Publications

OBJECTIVE

Programme implementers have argued that the increasing availability of antiretroviral therapy (ART) will reduce the stigma of HIV. We analyzed data from Uganda to assess how HIV-related stigma has changed during a period of ART expansion.

DESIGN

Serial cross-sectional surveys.

METHODS

We analyzed data from the Uganda AIDS Rural Treatment Outcomes study during 2007-2012 to estimate trends in internalized stigma among people living with HIV (PLHIV) at the time of treatment initiation. We analyzed data from the Uganda Demographic and Health Surveys from 2006 to 2011 to estimate trends in stigmatizing attitudes and anticipated stigma in the general population. We fitted regression models adjusted for sociodemographic characteristics, with year of data collection as the primary explanatory variable.

RESULTS

We estimated an upward trend in internalized stigma among PLHIV presenting for treatment initiation [adjusted b = 0.18; 95% confidence interval (CI), 0.06-0.30]. In the general population, the odds of reporting anticipated stigma were greater in 2011 compared with 2006 [adjusted odds ratio (OR) = 1.80; 95% CI, 1.51-2.13], despite an apparent decline in stigmatizing attitudes (adjusted OR = 0.62; 95% CI, 0.52-0.74).

CONCLUSION

Internalized stigma has increased over time among PLHIV in the setting of worsening anticipated stigma in the general population. Further study is needed to better understand the reasons for increasing HIV-related stigma in Uganda and its impact on HIV prevention efforts.

OBJECTIVE

Microbial translocation and innate immune action characterize HIV infection. Continued gut mucosal dysfunction during treatment and its relationship to CD4 T-cell recovery has not been well described.

DESIGN

A cross-sectional study was performed of antiretroviral therapy (ART)-suppressed (immunologic responders with CD4 > 500 cells/μl and immunologic nonresponders with CD4 < 350 cells/μl), untreated HIV-infected, and seronegative participants consenting to gut biopsies and a blood draw.

METHODS

Neutrophil infiltration as a surrogate response to epithelial breach, colorectal epithelial proliferation as a measure of repair, and mucosal apoptosis by immunohistochemistry were determined in gut biopsies. Plasma markers of monocyte activation (sCD14), immune activation (interleukin-6), and indoleamine 2,3-dioxygenase-1 activity (plasma kynurenine/tryptophanratio) were concurrently measured.

RESULTS

Each HIV-infected group had greater neutrophil infiltration than controls. Similarly, untreated HIV-infected participants and ART-suppressed immunologic responders had increased epithelial proliferation compared with controls, but immunologic nonresponders had no appreciable increase in epithelial proliferation despite elevated neutrophil infiltration. The CD4 T-cell count was positively correlated with epithelial proliferation and was modestly negatively correlated with neutrophil infiltration in ART-suppressed patients. Epithelial proliferation was inversely correlated with mucosal apoptosis, and apoptosis was linked to plasma sCD14 and modestly to kynurenine/tryptophan ratio.

CONCLUSIONS

Neutrophil infiltration and mucosal apoptosis remain abnormally high despite ART. Epithelial proliferation increases in HIV, but may be impaired in immunologic nonresponders. Whether mucosal apoptosis is a cause or consequence of epithelial proliferative defects is unclear, but appears to be associated with systemic inflammation. The impact of ART and interventions targeting the gut epithelial barrier in treated HIV infection warrant further investigation.

Interest in "Emerging Adulthood" (EA) as a unique developmental period has increased. This study examined the heterogeneity of EA among at-risk youth (N=1,677) by identifying trajectories of development across individuals. First, an 8-item version of the Inventory of Dimensions of EA (IDEA) measure was tested for factorial invariance across three time points; the 5-item EA measure was found to be factorially invariant. Next, latent class growth modeling identified three unique developmental trajectories. Lastly, classes were compared on demographics and health-risk behaviors. Class 1 represented a large, low-risk class (highest on EA). Classes 2 and 3 were comparably sized (~5% of the sample). Class 2 appears to be a high-risk class that decreases in EA, while Class 3 appears to be a medium-risk class that increases in EA. This study confirms that not everyone experiences EA similarly and that continuation high school students do not circumvent EA (move directly to adulthood).

Monocytes and macrophages are key components of the innate immune system yet they are often the victims of attack by infectious agents. This review examines the significance of viral infection of macrophages. The central hypothesis is that macrophage tropism enhances viral dissemination and persistence, but these changes may come at the cost of reduced replication in cells other than macrophages.

Short-rib polydactyly syndromes (SRPS) arise from mutations in genes involved in retrograde intraflagellar transport (IFT) and basal body homeostasis, which are critical for cilia assembly and function. Recently, mutations in WDR34 or WDR60 (candidate dynein intermediate chains) were identified in SRPS. We have identified and characterized Tctex1d2, which associates with Wdr34, Wdr60 and other dynein complex 1 and 2 subunits. Tctex1d2 and Wdr60 localize to the base of the cilium and their depletion causes defects in ciliogenesis. We propose that Tctex1d2 is a novel dynein light chain important for trafficking to the cilium and potentially retrograde IFT and is a new molecular link to understanding SRPS pathology.