Current paradigms of CD8 T cell-mediated protection in HIV infection center almost exclusively on studies of peripheral blood, which is thought to provide a window into immune activity at the predominant sites of viral replication in lymphoid tissues (LTs). Through extensive comparison of blood, thoracic duct lymph (TDL), and LTs in different species, we show that many LT memory CD8 T cells bear phenotypic, transcriptional, and epigenetic signatures of resident memory T cells (T). Unlike their circulating counterparts in blood or TDL, most of the total and follicular HIV-specific CD8 T cells in LTs also resemble T Moreover, high frequencies of HIV-specific CD8 T with skewed clonotypic profiles relative to matched blood samples are present in LTs of individuals who spontaneously control HIV replication in the absence of antiretroviral therapy (elite controllers). Single-cell RNA sequencing analysis confirmed that HIV-specific T are enriched for effector-related immune genes and signatures compared with HIV-specific non-T in elite controllers. Together, these data indicate that previous studies in blood have largely failed to capture the major component of HIV-specific CD8 T cell responses resident within LTs.

Notch1 signaling sustains the proinflammatory behavior of Th1 cells, implicated in the development of aplastic anemia in humans and mice.

We investigated the hypothesis that host immunosuppression due to advancing human immunodeficiency virus (HIV) disease favors the direct development of infective larvae of Strongyloides stercoralis, which may facilitate hyperinfection and, hence, disseminated strongyloidiasis. To do this, we sought correlations between the immune status of the subjects and the development of S. stercoralis infections. Among 35 adults, there were significant negative rank correlations between CD4+ cell counts and the proportions of free-living male and female worms. Thus, in individuals with preserved immune function, direct development of S. stercoralis is favored, whereas, in individuals with lesser immune function, indirect development is relatively more common. These results may explain the notable absence of disseminated strongyloidiasis in advanced HIV disease. Because disseminated infection requires the direct development of infective larvae in the gut, the observed favoring of indirect development in individuals immunosuppressed by advancing HIV disease is not consistent with the promotion of disseminated infection.

Family members with a relative with dementia often experience what has been called the “unexpected career of caregiver” and face multifaceted, complex, and stressful life situations that can have important consequences. This exploratory study was designed to address this major public health challenge through the lens of caregiver resilience and caregiver respite programming. While many caregivers report that they derive significant emotional and spiritual rewards from their caregiving role, many also experience physical and emotional problems directly related to the stress and demands of daily care. One way to alleviate these demands is the growing respite care field, providing services in a variety of settings for caregiver. Through qualitative analysis from face-to-face interviews with 33 family caregivers of individuals with dementia, several themes emerged describing the path to caregiver resilience which include family dynamics, isolation, financial struggles, seeking respite, and acceptance. While much research focuses on a caregiving burden perspective, the innovation of the present study is applying the resilience framework to outcomes from respite programming.