International Stem Cell Corporation (OTCBB:ISCO),         http://www.intlstemcell.com,         announced today that the United States Patent and Trademark Office        (USPTO) has granted ISCO patent number 7,732,202,  the first of several        pending patents relating to its development of human parthenogenetic        Stem Cells (hpSC).  Human parthenogenetic stem cells are a new type of        pluripotent stem cell that allows immune matching to potentially solve        critical immune rejection problems,  and does not involve the ethical        issues that surround the use of fertilized human embryos.     
       Although ISCO's creation of human parthenogenetic stem cells was first        announced in a peer review publication in 2007,  the formal allowance of        claims by the USPTO will greatly advance the field of regenerative        medicine by allowing ISCO to share its knowledge of these hpSC lines        more freely with researchers in the US and around the world through        partnerships,  joint ventures,  funded research and licensing arrangements.     
       The patent protects ISCO's technology platform,  allowing the creation of        hpSC from unfertilized eggs,  exhibiting similar qualities and        pluripotency as embryonic stem cells,  with the added ability to be        immune-matched to the donor,  as illustrated in published peer-reviewed        articles.  Additional discoveries,  also previously published in a peer        reviewed journal and the subject of pending ISCO patents,  illustrate the        creation of 'homozygous' hpSC that can be immune matched to millions of        persons of differing sexes and racial backgrounds,  rather than only to        the donor or her family,  raising the potential of eventually creating a        universal source of stem cells that could benefit most the of the        world's population.     
       Researchers across the world work with ISCO to study different        therapeutic applications of hpSC.  Through previously announced        collaborative arrangements,  ISCO's scientists are working with major        universities and private research organizations to study hpSC to treat        liver disease,  diabetes,  Age-related Macular Degeneration (AMD),  corneal        blindness and various neural degenerative diseases.  In one such research        collaboration,  internationally-recognized stem cell researcher Hans        Keirstead,  PhD,  at the Reeve-Irvine Research Center (University of        California,  Irvine),  recently published a paper,  referring to his use of        embryonic stem cells and ISCO's hpSC in work focused on the derivation        of early retinal progenitor tissue.     
       Andrey Semechkin,  PhD,  CEO of ISCO said,  'Other than parthenogenetic        stem cells,  the three most commonly used and described types of stem        cells are human embryonic stem cells (hESC),  induced pluripotent stem        cells (iPS),  and adult stem cells,  such as those derived from cord        blood,  adipose tissue or bone marrow.  Parthenogenetic stem cells have        unique advantages over each of these other cell types,  and we anticipate        that since our core patent has been issued,  we can now accelerate the        adoption of our hpSC lines by researchers in the US and throughout the        world.'     
       'International Stem Cell Corporation is particularly proud of these        accomplishments because we have been funded thus far entirely by        investors,  without NIH or other governmental aid,' said Jeffrey Janus,         Senior Vice President of ISCO.  'However,  once it is generally recognized        that parthenogenetic cells have similar characteristics of embryonic        stem cells and offer the potential to solve critical immune rejection        issues - while not requiring the destruction of viable human embryos -        we expect these cells to be increasingly used in government funded        research to study ways of reducing human suffering and treating        intractable human diseases.'     
ABOUT INTERNATIONAL STEM CELL CORPORATION (ISCO.OB):
       International Stem Cell Corporation is a California-based biotechnology        company focused on therapeutic and research products.  ISCO's core        technology,  parthenogenesis,  results in creation of pluripotent human        stem cells from unfertilized oocytes (eggs).  hpSCs avoid ethical issues        associated with the use or destruction of viable human embryos.  ISCO        scientists have created the first parthenogenic,  homozygous stem cell        line that can be a source of therapeutic cells with minimal immune        rejection after transplantation into hundreds of millions of individuals        of differing sexes,  ages and racial groups.  This offers the potential to        create the first true stem cell bank,  UniStemCell(TM),  while avoiding        the ethical issue of using fertilized eggs.  ISCO also produces and        markets specialized cells and growth media for therapeutic research        worldwide through its subsidiary Lifeline Cell Technology.  More        information is available at ISCO's website,  http://www.internationalstemcell.com.     
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FORWARD-LOOKING STATEMENTS
       Statements pertaining to anticipated technological developments and        therapeutic applications,  and other opportunities for the company and        its subsidiary,  along with other statements about the future        expectations,  beliefs,  goals,  plans,  or prospects expressed by        management constitute forward-looking statements.  Any statements that        are not historical fact (including,  but not limited to statements that        contain words such as "will," "believes," "plans," " anticipates,"        "expects," "estimates,") should also be considered to be forward-        looking statements.  Forward-looking statements involve risks and        uncertainties,  including,  without limitation,  risks inherent in the        development and/or commercialization of potential products,  uncertainty        in the results of clinical trials or regulatory approvals,  need and        ability to obtain future capital,  application of capital resources among        competing uses,  and maintenance of intellectual property rights.  Actual        results may differ materially from the results anticipated in these        forward-looking statements and as such should be evaluated together with        the many uncertainties that affect the company's business,  particularly        those mentioned in the cautionary statements found in the company's        Securities and Exchange Commission filings.  The company disclaims any        intent or obligation to updat
e these forward-looking statements.     
       Key Words: Stem Cells,  Biotechnology,  Parthenogenesis     

       International Stem Cell Corporation
Kenneth C.  Aldrich,  Chairman
760-940-6383
kaldrich@intlstemcell.com
or
Brian        Lundstrom,  President
760-640-6383
bl@intlstemcell.com