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Chimeric SCID-hu Model As a Human Hematopoietic Stem Cell Host That Recapitulates the Effects of HIV-1 on Bone Marrow Progenitors in Infected Patients

Overview
Journal J Stem Cells
Specialty Cell Biology
Date 2008 Nov 26
PMID 19030112
Citations 4
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Abstract

The chimeric small animal model system wherein the severe combined immunodeficient mouse is transplanted with human fetal thymus and liver tissues (SCID-hu Thy/Liv) has been used in different areas of experimental research [1]. A living model system offers the advantage that studies of longer duration than in vitro can be performed. Here we discuss the importance of experimental in vivo studies and how well the data generated using this model system correlates with epidemiological studies from HIV-positive humans. Patients with HIV-1 infection often suffer from cytopenias, with thrombocytopenia typically having an earlier onset than anemia and neutropenia. The cytopenias in patients may be caused by virus effects at the stem cell level, or the mature blood cell level, or by other factors like medications used to treat the infection. Several studies preformed in SCID-hu animals show that the function of human hematopoietic progenitor stem cells are indirectly affected by HIV-1 infection. Colony forming activity (CFA) assays on hematopoietic progenitor cells derived from SCID-hu animals and human bone marrow have been performed as a measure of progenitor cellular function, and HIV-1 infection decreased CFA in multiple lineages that include megakaryoid, erythroid and myeloid types. Highly active antiretroviral therapy (HAART) partially and transiently reduces the inhibition of multilineage CFA and data suggest that HIV-1 indirectly affects stem cell differentiation into multiple lineages. The cojoint human hematopoietic organ of this small animal model system recapitulates the inhibitory effects of HIV-1 infection on the function of progenitor cells of the human bone marrow. Thus the SCID-hu (Thy/Liv) model is a useful in vivo system for preclinical translational research towards development of stem cell therapies in HIV infection.

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References
1.
. Valganciclovir: new preparation. CMV retinitis: a simpler, oral treatment. Prescrire Int. 2003; 12(66):133-5. View

2.
Li Z, Nardi M, Karpatkin S . Role of molecular mimicry to HIV-1 peptides in HIV-1-related immunologic thrombocytopenia. Blood. 2005; 106(2):572-6. PMC: 1895171. DOI: 10.1182/blood-2005-01-0243. View

3.
Michael N, Nelson J, Kewalramani V, Chang G, OBrien S, Mascola J . Exclusive and persistent use of the entry coreceptor CXCR4 by human immunodeficiency virus type 1 from a subject homozygous for CCR5 delta32. J Virol. 1998; 72(7):6040-7. PMC: 110409. DOI: 10.1128/JVI.72.7.6040-6047.1998. View

4.
Lannutti B, Drachman J . Lyn tyrosine kinase regulates thrombopoietin-induced proliferation of hematopoietic cell lines and primary megakaryocytic progenitors. Blood. 2004; 103(10):3736-43. DOI: 10.1182/blood-2003-10-3566. View

5.
Emery S, Capra W, Cooper D, Mitsuyasu R, Kovacs J, Vig P . Pooled analysis of 3 randomized, controlled trials of interleukin-2 therapy in adult human immunodeficiency virus type 1 disease. J Infect Dis. 2000; 182(2):428-34. DOI: 10.1086/315736. View