Publications

Human APOBEC3G (A3G), a deoxycytidine deaminase, is a broadly acting antiretroviral factor expressed in a variety of cells. Mitogen activation of CD4 T cells enhances A3G expression and leads to recruitment of low molecular mass (LMM) A3G, which functions as a post-entry human immunodeficiency virus (HIV) restriction factor, into enzymatically inactive, high molecular mass (HMM) RNA-protein complexes that include Staufen RNA-transporting granules. We now report that interleukin-2 (IL-2), IL-15 and, to a lesser extent, IL-7 enhance the expression of A3G in peripheral blood lymphocytes and that this effect is blocked by inhibitors of the JAK and MAPK signaling pathways. In mixed cultures of CD4+ T cells containing either HMM or LMM A3G, HIV preferentially infected cells containing HMM A3G. A3G shifted into a HMM complex when IL-2, -7, or -15 was added to resting T cells, likely explaining how cytokine treatment renders resting CD4+ T cells permissive to HIV infection. Similarly, poly(I:C)/tumor necrosis factor-alpha-induced maturation of dendritic cells was associated with a sharp increase in A3G expression; however, this induction led to the accumulation of LMM A3G. Together, these results highlight the distinct inductive effects of select cytokines on A3G gene expression and A3G complex assembly that occur in natural cellular targets of HIV infection.

PURPOSE

Understanding practice models and provider costs for medication abortion (MAB) provision may elucidate ways to facilitate MAB integration into a larger arena of health care services. This study provides descriptive data on the diverse MAB practice models currently being utilized by US health care providers and the costs associated with the components of those models.

METHOD

Data were gathered from a sample of 11 abortion care settings, using clinic administrative records and patient satisfaction surveys.

RESULTS

Practice models varied dramatically, with a wide range in the type of staff employed to provide MAB. The total episode cost for providing MAB ranged from 252 to 460 US Dollars, and patient satisfaction was high across all practices.

CONCLUSION

Information from this study can be used to guide decisions regarding MAB integration into practices not currently providing abortion or which provide only aspiration abortions. The information may also be useful for providers wishing to refine their MAB services.