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American medical academics
Ihor R. Lemischka
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    Ihor R. Lemischka

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    Ihor R. Lemischka, Ph.D. was an internationally recognized stem cell biologist and stem cell research advocate and was both the Lillian and Henry M. Stratton Professor of Gene and Cell Medicine and Director of the Black Family Stem Cell Institute at Mount Sinai Medical Center in New York City.

    His work with hematopoietic stem cells (HSC) was the first to identify their novel receptor tyrosine kinases and showed that HSC can rebuild all blood cell types in a mouse whose blood cells had been destroyed.

    He authored over 70 book chapters and publications in peer-reviewed journals.

    Biography

    Education and post-doctoral training

    Lemischka graduated from Johns Hopkins University in 1976 and earned his Ph.D in biology from MIT in 1983. He did his post-doctoral training at MIT's Whitehead Institute.

    Academic appointments

    Lemischka joined Princeton University in 1986 as Assistant Professor of Molecular Biology; he became Professor in 2002. In 2007, he joined the staff at Mount Sinai Medical Center, where he was Professor of Gene and Cell Medicine and Director of the Black Family Stem Cell Institute.

    Affiliations and awards

    Lemischka was a board member of the International Society for Stem Cell Research, the Journal of Visualized Experiments (JoVE) and the New York Stem Cell Foundation. His awards included a Damon Runyon-Walter Winchell Postdoctoral, a Leukemia Social Special Fellowship, an American Cyanamid Preceptorship Award and the DuPont Young Faculty Grant. He was a journal reviewer for Cell, Science, Nature, Nature Genetics, Nature Immunology, Nature Biotechnology, Proceedings of the National Academy of Sciences, Public Library of Science, Development, Genes & Development, Journal of Clinical Investigation and Blood.

    Patents

    Lemischka held or had patents pending for the following:

    Patent Number Title
    7465464 Populations of cells that express flk-2 receptors
    7445798 Populations of cells that express FLK-1 receptors
    6960446 Method for isolating cells expressing flk-2
    6677434 Soluble human flk-2 protein
    6613565 Use of delta-like protein to inhibit the differentiation of stem cells
    5912133 Method for isolating stem cells expressing flk-1 receptors
    5747651 Antibodies against tyrosine kinase receptor flk-1
    5621090 Nucleic acids encoding soluble human FLK-2 extracellular domain
    5548065 Tyrosine kinase receptor human flk-2-specific antibodies
    5367057 Tyrosine kinase receptor flk-2 and fragments thereof
    5283354 Nucleic acids encoding hematopoietic stem cells receptors flk-1
    5270458 Nucleic acids encoding fragments of hematopoietic stem cell receptor flk-2
    5185438 Nucleic acids encoding hencatoporetic stem cell receptor flk-2

    Areas of concentration

    Lemischka's interests included defining the cellular and molecular mechanisms that control cell fate decisions in embryonic stem cells. Research into mouse embryonic stem cells was aggressively studied in the embryonic stem cells of humans.

    Publications

    Partial List:

    • Fasano C, Dimos JT, Ivanova NB, Lowry N, Lemischka IR, Temple S. shRNA knockdown of Bmi-1 reveals a critical role for p21/Rb pathway in NSC self-renewal during development. Cell Stem Cell 2007; 1: 87-99. PMID 18371338
    • Ivanova N, Dobrin R, Lu R, Kotenko I, Levorse J, DeCoste C, Schafer X, Lun Y, Lemischka IR. Dissecting self-renewal in stem cells with RNA interference. Nature 2006; 442: 533-538. PMID 16767105
    • Moore KA, Lemischka IR. Stem cells and their niches. Science 2006; 311: 1880-1885. PMID 16574858
    • Schaniel C, Li F, Schafer X, Moore T, Lemischka I, Paddison P. Delivery of short hairpin RNAs-triggers of gene silencing into mouse embryonic stem cells. Nature Methods 2006; 3: 6946-6951. PMID 16628211
    • Pritsker M, Ford N, Jenq H, Lemischka IR. Genome-wide gain-of-function genetic screen identifies functionally active genes in mouse embryonic stem cells. Proc. Natl, Acad Sci USA 2006; 103: 6946-6951. PMID 16621925
    • Shen Q, Wang Y, Dimos JT, Fasano CA, Phoenix TN, Lemischka IR, Ivanova NB, Stifani S, Morrisey EE, Temple S. The timing of cortical neurogenesis is encoded within lineages of individual progenitor cells. Nat Neurosci. 2006; 9: 743-751. PMID 16680166
    • Pritsker M, Doniger T, Kramer L, Westcot S, Lemischka IR, . Diversification of stem cell molecular repertoire by alternative splicing. Proc. Natl. Acad. Sci. USA 2005; 102: 14290-14295. PMID 16183747
    • Ivanova NB, Dimos JT, Schaniel C, Hackney JA, Moore KA, Lemischka IR. A stem cell molecular signature. Science 2002; 298: 601-604. PMID 12228721
    • Phillips RL, Ernst RE, Brunk B, Ivanova N, Mahan MA, Deanehan JK, Moore KA, Overton GC, Lemischka IR. The Genetic Program of Hematopoietic Stem Cells. Science 2000; 288: 1635-1640. PMID 10834841
    • Petrenko O, Beavis A, Klaine M, Godin I, Lemischka IR. The molecular characterization of the fetal stem cell marker AA4. Immunity 1999; 10: 691-700. doi:10.1016/S1074-7613(00)80068-0 PMID 10403644

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