Ho RJ, Agy MB, Morton WR, Scheibel M, McClure J, Watson A, Hu SL, Nosbisch C, Dorofeeva N, Unadkat JD. Development of a chronically catheterized maternal-fetal macaque model to study in utero mother-to-fetus HIV transmission: a preliminary report.
J Med Primatol 1996;
25:218-24. [PMID:
8892043 DOI:
10.1111/j.1600-0684.1996.tb00019.x]
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Abstract
The lack of a representative animal model that permits frequent in utero fetal blood sampling is a major limiting factor for the study of maternal-fetal HIV transmission. Therefore, we have developed a maternal-fetal virus infection model using chronically catheterized macaques to simultaneously study the time-course of viral infection in the mother and the response of the fetus to maternal HIV infection. Pregnant macaques were infected with 10(3) infectious units of HIV-2(287); every 3 days blood samples from both the mother and the fetus as well as amniotic fluid samples were collected. We found a varying degree of peak and time-to-peak virus load, virus-infected PBMCs, and free virus (determined by QC-RNA-PCR method) in maternal blood. Two of the three mothers with more than 10(8) copies of viral RNA/ml of plasma at peak viremia transmitted the virus to their fetuses at about 14 days post-infection. As observed with HIV-2(287) infected mothers, virus-infected fetuses also produced a rapid rate of CD4+ cell decline in utero.
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