<?xml version="1.0" encoding="US-ASCII" standalone="no"?>
<!--P3XBRL-->
<!--version 3.9.5 -->
<!--http://www.p3xbrl.com-->
<!--produced on 2011-11-09 @ 11:30 AM-->
<link:linkbase xmlns:psti="http://www.pluristem.com/20110930" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase">
  <link:roleRef roleURI="http://www.pluristem.com/role/DocumentAndEntityInformation" xlink:href="psti-20110930.xsd#psti-daei" xlink:type="simple" />
  <link:roleRef roleURI="http://www.pluristem.com/role/ConsolidatedBalanceSheets" xlink:href="psti-20110930.xsd#psti-cbsh" xlink:type="simple" />
  <link:roleRef roleURI="http://www.pluristem.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="psti-20110930.xsd#psti-cbsp" xlink:type="simple" />
  <link:roleRef roleURI="http://www.pluristem.com/role/ConsolidatedStatementsOfOperations" xlink:href="psti-20110930.xsd#psti-csop" xlink:type="simple" />
  <link:roleRef roleURI="http://www.pluristem.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="psti-20110930.xsd#psti-cscf" xlink:type="simple" />
  <link:roleRef roleURI="http://www.pluristem.com/role/General" xlink:href="psti-20110930.xsd#psti-genl" xlink:type="simple" />
  <link:roleRef roleURI="http://www.pluristem.com/role/SignificantAccountingPolicies" xlink:href="psti-20110930.xsd#psti-saps" xlink:type="simple" />
  <link:roleRef roleURI="http://www.pluristem.com/role/ShareCapitalAndStockOptions" xlink:href="psti-20110930.xsd#psti-scso" xlink:type="simple" />
  <link:roleRef roleURI="http://www.pluristem.com/role/StatementsOfChangesInStockholdersEquity" xlink:href="psti-20110930.xsd#psti-scse" xlink:type="simple" />
  <link:roleRef roleURI="http://www.pluristem.com/role/MarketableSecurities" xlink:href="psti-20110930.xsd#psti-mase" xlink:type="simple" />
  <link:roleRef roleURI="http://www.pluristem.com/role/FairValueOfFinancialInstruments" xlink:href="psti-20110930.xsd#psti-fvfi" xlink:type="simple" />
  <link:roleRef roleURI="http://www.pluristem.com/role/CommitmentsAndContingencies" xlink:href="psti-20110930.xsd#psti-coco" xlink:type="simple" />
  <link:roleRef roleURI="http://www.pluristem.com/role/SubsequentEvents" xlink:href="psti-20110930.xsd#psti-suev" xlink:type="simple" />
  <link:roleRef roleURI="http://www.pluristem.com/role/StatementsOfChangesInStockholdersEquityParenthetical" xlink:href="psti-20110930.xsd#psti-ssepar" xlink:type="simple" />
  <link:calculationLink xlink:title="002 - Statement - CONSOLIDATED BALANCE SHEETS" xlink:role="http://www.pluristem.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:label="loc_LiabilitiesCurrent.6082.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:type="locator" />
    <link:loc xlink:label="loc_AccountsPayableCurrent.13891.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_LiabilitiesCurrent.6082.14.6" xlink:to="loc_AccountsPayableCurrent.13891.14.6" order="1" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_AccruedLiabilitiesCurrent.13904.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_LiabilitiesCurrent.6082.14.6" xlink:to="loc_AccruedLiabilitiesCurrent.13904.14.6" order="2.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_AccountsPayableOtherCurrent.13894.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccountsPayableOtherCurrent" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_LiabilitiesCurrent.6082.14.6" xlink:to="loc_AccountsPayableOtherCurrent.13894.14.6" order="3.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_DeferredRevenueCurrent.6389.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredRevenueCurrent" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_LiabilitiesCurrent.6082.14.6" xlink:to="loc_DeferredRevenueCurrent.6389.14.6" order="2.50" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_CustomerAdvancesCurrent.6090.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CustomerAdvancesCurrent" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_LiabilitiesCurrent.6082.14.6" xlink:to="loc_CustomerAdvancesCurrent.6090.14.6" order="2.75" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_LiabilitiesAndStockholdersEquity.8067.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_LiabilitiesAndStockholdersEquity.8067.14.6" xlink:to="loc_LiabilitiesCurrent.6082.14.6" order="1" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_LiabilitiesNoncurrent.8718.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_LiabilitiesAndStockholdersEquity.8067.14.6" xlink:to="loc_LiabilitiesNoncurrent.8718.14.6" order="3.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_StockholdersEquity.12567.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_StockholdersEquity" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_LiabilitiesAndStockholdersEquity.8067.14.6" xlink:to="loc_StockholdersEquity.12567.14.6" order="4.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_CommitmentsAndContingencies.13629.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_LiabilitiesAndStockholdersEquity.8067.14.6" xlink:to="loc_CommitmentsAndContingencies.13629.14.6" order="2.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_AssetsNoncurrent.8716.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsNoncurrent" xlink:type="locator" />
    <link:loc xlink:label="loc_DepositsAssetsNoncurrent.6429.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DepositsAssetsNoncurrent" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_AssetsNoncurrent.8716.14.6" xlink:to="loc_DepositsAssetsNoncurrent.6429.14.6" order="1" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_PropertyPlantAndEquipmentNet.9645.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_AssetsNoncurrent.8716.14.6" xlink:to="loc_PropertyPlantAndEquipmentNet.9645.14.6" order="3.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent.13987.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_AssetsNoncurrent.8716.14.6" xlink:to="loc_DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent.13987.14.6" order="2.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_PostemploymentBenefitsLiabilityNoncurrent.6249.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PostemploymentBenefitsLiabilityNoncurrent" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_LiabilitiesNoncurrent.8718.14.6" xlink:to="loc_PostemploymentBenefitsLiabilityNoncurrent.6249.14.6" order="2.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_DeferredRevenueNoncurrent.6390.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredRevenueNoncurrent" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_LiabilitiesNoncurrent.8718.14.6" xlink:to="loc_DeferredRevenueNoncurrent.6390.14.6" order="1" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_AssetsCurrent.11042.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetsCurrent" xlink:type="locator" />
    <link:loc xlink:label="loc_CashAndCashEquivalentsAtCarryingValue.5490.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_AssetsCurrent.11042.14.6" xlink:to="loc_CashAndCashEquivalentsAtCarryingValue.5490.14.6" order="1" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_PrepaidExpenseCurrent.9435.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PrepaidExpenseCurrent" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_AssetsCurrent.11042.14.6" xlink:to="loc_PrepaidExpenseCurrent.9435.14.6" order="3.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ReceivablesNetCurrent.9869.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ReceivablesNetCurrent" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_AssetsCurrent.11042.14.6" xlink:to="loc_ReceivablesNetCurrent.9869.14.6" order="5.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_NontradeReceivablesCurrent.13575.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NontradeReceivablesCurrent" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_AssetsCurrent.11042.14.6" xlink:to="loc_NontradeReceivablesCurrent.13575.14.6" order="4.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_MarketableSecuritiesCurrent.8453.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MarketableSecuritiesCurrent" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_AssetsCurrent.11042.14.6" xlink:to="loc_MarketableSecuritiesCurrent.8453.14.6" order="2.50" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ShortTermInvestments.10802.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShortTermInvestments" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_AssetsCurrent.11042.14.6" xlink:to="loc_ShortTermInvestments.10802.14.6" order="2.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_Assets.11397.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Assets" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_Assets.11397.14.6" xlink:to="loc_AssetsCurrent.11042.14.6" order="1" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:calculationArc xlink:from="loc_Assets.11397.14.6" xlink:to="loc_AssetsNoncurrent.8716.14.6" order="2.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_CommonStockValue.5831.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CommonStockValue" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_StockholdersEquity.12567.14.6" xlink:to="loc_CommonStockValue.5831.14.6" order="1" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_AdditionalPaidInCapital.4916.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_StockholdersEquity.12567.14.6" xlink:to="loc_AdditionalPaidInCapital.4916.14.6" order="3.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_RetainedEarningsAccumulatedDeficit.10174.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_StockholdersEquity.12567.14.6" xlink:to="loc_RetainedEarningsAccumulatedDeficit.10174.14.6" order="2.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_AccumulatedOtherComprehensiveIncomeLossNetOfTax.4876.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_StockholdersEquity.12567.14.6" xlink:to="loc_AccumulatedOtherComprehensiveIncomeLossNetOfTax.4876.14.6" order="4.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:title="004 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS" xlink:role="http://www.pluristem.com/role/ConsolidatedStatementsOfOperations" xlink:type="extended">
    <link:loc xlink:label="loc_NetIncomeLoss.8620.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:type="locator" />
    <link:loc xlink:label="loc_OperatingIncomeLoss.8862.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetIncomeLoss.8620.14.6" xlink:to="loc_OperatingIncomeLoss.8862.14.6" order="1" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_FinancialIncomeExpenseNet.33947.14.6" xlink:href="psti-20110930.xsd#psti_FinancialIncomeExpenseNet" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetIncomeLoss.8620.14.6" xlink:to="loc_FinancialIncomeExpenseNet.33947.14.6" order="2.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_GeneralAndAdministrativeExpense.7417.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_OperatingIncomeLoss.8862.14.6" xlink:to="loc_GeneralAndAdministrativeExpense.7417.14.6" order="3.00" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ImpairmentOfIntangibleAssetsExcludingGoodwill.7506.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_OperatingIncomeLoss.8862.14.6" xlink:to="loc_ImpairmentOfIntangibleAssetsExcludingGoodwill.7506.14.6" order="4.00" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ResearchAndDevelopmentExpensesNet.33159.14.6" xlink:href="psti-20110930.xsd#psti_ResearchAndDevelopmentExpensesNet" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_OperatingIncomeLoss.8862.14.6" xlink:to="loc_ResearchAndDevelopmentExpensesNet.33159.14.6" order="1" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_Revenues.8863.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Revenues" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_OperatingIncomeLoss.8862.14.6" xlink:to="loc_Revenues.8863.14.6" order="2.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ResearchAndDevelopmentExpense.11299.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_ResearchAndDevelopmentExpensesNet.33159.14.6" xlink:to="loc_ResearchAndDevelopmentExpense.11299.14.6" order="1" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ParticipationByOfficeOfChiefScientistAndOtherParties.33160.14.6" xlink:href="psti-20110930.xsd#psti_ParticipationByOfficeOfChiefScientistAndOtherParties" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_ResearchAndDevelopmentExpensesNet.33159.14.6" xlink:to="loc_ParticipationByOfficeOfChiefScientistAndOtherParties.33160.14.6" order="2.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:title="007 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS" xlink:role="http://www.pluristem.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <link:loc xlink:label="loc_NetCashProvidedByUsedInFinancingActivities.8568.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:type="locator" />
    <link:loc xlink:label="loc_ProceedsFromIssuanceOfCommonStock.9525.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInFinancingActivities.8568.14.6" xlink:to="loc_ProceedsFromIssuanceOfCommonStock.9525.14.6" order="1" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions.14053.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInFinancingActivities.8568.14.6" xlink:to="loc_ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions.14053.14.6" order="2.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ReceiptsOnAccountOfShares.33168.14.6" xlink:href="psti-20110930.xsd#psti_ReceiptsOnAccountOfShares" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInFinancingActivities.8568.14.6" xlink:to="loc_ReceiptsOnAccountOfShares.33168.14.6" order="3.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ProceedsFromConvertibleDebt.9511.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromConvertibleDebt" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInFinancingActivities.8568.14.6" xlink:to="loc_ProceedsFromConvertibleDebt.9511.14.6" order="4.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_PaymentsOfDebtIssuanceCosts.6197.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInFinancingActivities.8568.14.6" xlink:to="loc_PaymentsOfDebtIssuanceCosts.6197.14.6" order="5.00" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_PaymentsOfKnowHowLicensors.33169.14.6" xlink:href="psti-20110930.xsd#psti_PaymentsOfKnowHowLicensors" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInFinancingActivities.8568.14.6" xlink:to="loc_PaymentsOfKnowHowLicensors.33169.14.6" order="6.00" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_RepaymentsOfRelatedPartyDebt.10028.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentsOfRelatedPartyDebt" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInFinancingActivities.8568.14.6" xlink:to="loc_RepaymentsOfRelatedPartyDebt.10028.14.6" order="7.00" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ProceedsFromRelatedPartyDebt.9561.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromRelatedPartyDebt" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInFinancingActivities.8568.14.6" xlink:to="loc_ProceedsFromRelatedPartyDebt.9561.14.6" order="8.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ProceedsFromIssuanceOfLongTermDebt.9547.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInFinancingActivities.8568.14.6" xlink:to="loc_ProceedsFromIssuanceOfLongTermDebt.9547.14.6" order="9.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_RepaymentsOfLongTermDebt.10020.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInFinancingActivities.8568.14.6" xlink:to="loc_RepaymentsOfLongTermDebt.10020.14.6" order="10.00" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_NetCashProvidedByUsedInInvestingActivities.8569.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:type="locator" />
    <link:loc xlink:label="loc_PaymentsToAcquirePropertyPlantAndEquipment.9790.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInInvestingActivities.8569.14.6" xlink:to="loc_PaymentsToAcquirePropertyPlantAndEquipment.9790.14.6" order="3.00" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_IncreaseDecreaseInTimeDeposits.8613.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInTimeDeposits" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInInvestingActivities.8569.14.6" xlink:to="loc_IncreaseDecreaseInTimeDeposits.8613.14.6" order="4.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ProceedsFromSaleOfPropertyPlantAndEquipment.9582.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInInvestingActivities.8569.14.6" xlink:to="loc_ProceedsFromSaleOfPropertyPlantAndEquipment.9582.14.6" order="5.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ProceedsFromSaleOfRestrictedInvestments.9586.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromSaleOfRestrictedInvestments" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInInvestingActivities.8569.14.6" xlink:to="loc_ProceedsFromSaleOfRestrictedInvestments.9586.14.6" order="7.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_PaymentsToAcquireAvailableForSaleSecuritiesEquity.12112.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesEquity" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInInvestingActivities.8569.14.6" xlink:to="loc_PaymentsToAcquireAvailableForSaleSecuritiesEquity.12112.14.6" order="8.00" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities.9550.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInInvestingActivities.8569.14.6" xlink:to="loc_ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities.9550.14.6" order="9.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_PaymentsToAcquireIntangibleAssets.9757.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquireIntangibleAssets" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInInvestingActivities.8569.14.6" xlink:to="loc_PaymentsToAcquireIntangibleAssets.9757.14.6" order="10.00" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_AcquisitionCosts.12714.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AcquisitionCosts" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInInvestingActivities.8569.14.6" xlink:to="loc_AcquisitionCosts.12714.14.6" order="1" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ReceiptsFromTimeDeposits.33167.14.6" xlink:href="psti-20110930.xsd#psti_ReceiptsFromTimeDeposits" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInInvestingActivities.8569.14.6" xlink:to="loc_ReceiptsFromTimeDeposits.33167.14.6" order="2.00" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ProceedsFromSaleOfShortTermInvestments.9588.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ProceedsFromSaleOfShortTermInvestments" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInInvestingActivities.8569.14.6" xlink:to="loc_ProceedsFromSaleOfShortTermInvestments.9588.14.6" order="3.50" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_PaymentsToAcquireInvestments.9760.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PaymentsToAcquireInvestments" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInInvestingActivities.8569.14.6" xlink:to="loc_PaymentsToAcquireInvestments.9760.14.6" order="6.00" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:type="locator" />
    <link:loc xlink:label="loc_NetIncomeLoss.8620.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_NetIncomeLoss" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_NetIncomeLoss.8620.14.6" order="1" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_Depreciation.4943.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_Depreciation" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_Depreciation.4943.14.6" order="8.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_GainLossOnSaleOfPropertyPlantEquipment.7397.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_GainLossOnSaleOfPropertyPlantEquipment.7397.14.6" order="9.00" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_AssetImpairmentCharges.5134.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AssetImpairmentCharges" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_AssetImpairmentCharges.5134.14.6" order="10.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ImpairmentOfIntangibleAssetsExcludingGoodwill.7506.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_ImpairmentOfIntangibleAssetsExcludingGoodwill.7506.14.6" order="11.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_DeferredFinanceCostsOwnshareLendingArrangementIssuanceCostsAmortizationExpense.14246.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_DeferredFinanceCostsOwnshareLendingArrangementIssuanceCostsAmortizationExpense" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_DeferredFinanceCostsOwnshareLendingArrangementIssuanceCostsAmortizationExpense.14246.14.6" order="12.00" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ShareBasedCompensation.6966.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_ShareBasedCompensation.6966.14.6" order="13.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_KnowHowLicensorsImputedInterest.33166.14.6" xlink:href="psti-20110930.xsd#psti_KnowHowLicensorsImputedInterest" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_KnowHowLicensorsImputedInterest.33166.14.6" order="14.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_SalaryGrantInSharesAndWarrants.33164.14.6" xlink:href="psti-20110930.xsd#psti_SalaryGrantInSharesAndWarrants" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_SalaryGrantInSharesAndWarrants.33164.14.6" order="15.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets.5699.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets.5699.14.6" order="17.00" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_IncreaseDecreaseInAccountsPayable.5726.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_IncreaseDecreaseInAccountsPayable.5726.14.6" order="18.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities.5633.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities.5633.14.6" order="19.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_IncreaseDecreaseInAccruedInterestReceivableNet.5674.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_IncreaseDecreaseInAccruedInterestReceivableNet.5674.14.6" order="20.00" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_IncreaseDecreaseInDueToRelatedParties.5739.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInDueToRelatedParties" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_IncreaseDecreaseInDueToRelatedParties.5739.14.6" order="21.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_LinkageDifferencesAndInterestOnLongTermRestrictedLeaseDeposit.33165.14.6" xlink:href="psti-20110930.xsd#psti_LinkageDifferencesAndInterestOnLongTermRestrictedLeaseDeposit" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_LinkageDifferencesAndInterestOnLongTermRestrictedLeaseDeposit.33165.14.6" order="22.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_AmortizationOfDebtDiscountPremium.5284.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_AmortizationOfDebtDiscountPremium" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_AmortizationOfDebtDiscountPremium.5284.14.6" order="23.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_MarketableSecuritiesRealizedGainLoss.11428.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MarketableSecuritiesRealizedGainLoss" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_MarketableSecuritiesRealizedGainLoss.11428.14.6" order="24.00" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments.15729.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_MarketableSecuritiesRealizedGainLossExcludingOtherThanTemporaryImpairments.15729.14.6" order="25.00" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_IncreaseDecreaseInPensionAndPostretirementObligations.13204.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInPensionAndPostretirementObligations" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_IncreaseDecreaseInPensionAndPostretirementObligations.13204.14.6" order="26.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_FairValueOfWarrantsGrantedToInvestors.33307.14.6" xlink:href="psti-20110930.xsd#psti_FairValueOfWarrantsGrantedToInvestors" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_FairValueOfWarrantsGrantedToInvestors.33307.14.6" order="7.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ShareBasedGoodsAndNonemployeeServicesTransactionExpense.10769.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ShareBasedGoodsAndNonemployeeServicesTransactionExpense" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_ShareBasedGoodsAndNonemployeeServicesTransactionExpense.10769.14.6" order="4.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_IssuanceOfStockAndWarrantsForServicesOrClaims.4951.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IssuanceOfStockAndWarrantsForServicesOrClaims" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_IssuanceOfStockAndWarrantsForServicesOrClaims.4951.14.6" order="5.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ChangeInFairValueOfLiabilityInRespectOfWarrants.33349.14.6" xlink:href="psti-20110930.xsd#psti_ChangeInFairValueOfLiabilityInRespectOfWarrants" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_ChangeInFairValueOfLiabilityInRespectOfWarrants.33349.14.6" order="6.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_AmortizationOfDiscountAndPremiumAndChangesInAccruedInterestFromMarketableSecurities.33949.14.6" xlink:href="psti-20110930.xsd#psti_AmortizationOfDiscountAndPremiumAndChangesInAccruedInterestFromMarketableSecurities" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_AmortizationOfDiscountAndPremiumAndChangesInAccruedInterestFromMarketableSecurities.33949.14.6" order="18.50" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ShareBasedCompensationToEmployeesDirectorsAndNonEmployees.33948.14.6" xlink:href="psti-20110930.xsd#psti_ShareBasedCompensationToEmployeesDirectorsAndNonEmployees" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_ShareBasedCompensationToEmployeesDirectorsAndNonEmployees.33948.14.6" order="6.50" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_IncreaseDecreaseInDeferredRevenue.12234.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInDeferredRevenue" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_IncreaseDecreaseInDeferredRevenue.12234.14.6" order="13.50" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_IncreaseDecreaseInCustomerAdvances.5648.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInCustomerAdvances" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_IncreaseDecreaseInCustomerAdvances.5648.14.6" order="13.75" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_LinkageDifferencesAndInterestOnShortTermRestrictedLeaseDeposit.34066.14.6" xlink:href="psti-20110930.xsd#psti_LinkageDifferencesAndInterestOnShortTermRestrictedLeaseDeposit" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_LinkageDifferencesAndInterestOnShortTermRestrictedLeaseDeposit.34066.14.6" order="15.50" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_IncreaseDecreaseInOtherReceivables.5690.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_IncreaseDecreaseInOtherReceivables" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" xlink:to="loc_IncreaseDecreaseInOtherReceivables.5690.14.6" order="10.50" weight="-1.00" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_CashAndCashEquivalentsPeriodIncreaseDecrease.8623.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_CashAndCashEquivalentsPeriodIncreaseDecrease.8623.14.6" xlink:to="loc_NetCashProvidedByUsedInOperatingActivities.8570.14.6" order="1" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:calculationArc xlink:from="loc_CashAndCashEquivalentsPeriodIncreaseDecrease.8623.14.6" xlink:to="loc_NetCashProvidedByUsedInInvestingActivities.8569.14.6" order="2.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:calculationArc xlink:from="loc_CashAndCashEquivalentsPeriodIncreaseDecrease.8623.14.6" xlink:to="loc_NetCashProvidedByUsedInFinancingActivities.8568.14.6" order="3.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_OtherSupplementalDisclosureCashFlow.33176.14.6" xlink:href="psti-20110930.xsd#psti_OtherSupplementalDisclosureCashFlow" xlink:type="locator" />
    <link:loc xlink:label="loc_WorkingCapitalExcludingCashAndCashEquivalents.33174.14.6" xlink:href="psti-20110930.xsd#psti_WorkingCapitalExcludingCashAndCashEquivalents" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_OtherSupplementalDisclosureCashFlow.33176.14.6" xlink:to="loc_WorkingCapitalExcludingCashAndCashEquivalents.33174.14.6" order="1" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_LongTermRestrictedLeaseDeposit.33175.14.6" xlink:href="psti-20110930.xsd#psti_LongTermRestrictedLeaseDeposit" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_OtherSupplementalDisclosureCashFlow.33176.14.6" xlink:to="loc_LongTermRestrictedLeaseDeposit.33175.14.6" order="2.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_PropertyPlantAndEquipmentAdditions.11289.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAdditions" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_OtherSupplementalDisclosureCashFlow.33176.14.6" xlink:to="loc_PropertyPlantAndEquipmentAdditions.11289.14.6" order="3.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
    <link:loc xlink:label="loc_ResearchAndDevelopmentInProcess.9615.14.6" xlink:href="http://xbrl.fasb.org/us-gaap/2011/elts/us-gaap-2011-01-31.xsd#us-gaap_ResearchAndDevelopmentInProcess" xlink:type="locator" />
    <link:calculationArc xlink:from="loc_OtherSupplementalDisclosureCashFlow.33176.14.6" xlink:to="loc_ResearchAndDevelopmentInProcess.9615.14.6" order="4.00" weight="1" priority="0" use="optional" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:type="arc" />
  </link:calculationLink>
</link:linkbase>
