Out of 91 volunteers enrolled for the HIV vaccine trial, only 33 volunteers were eligible for vaccination. Of 33 volunteers recruited, 59 per cent of them had incomes of more than 5,000 Baht/ month. The median duration of drug addicts was 15 years (range 1-26 years) and 42 per cent never used condoms during sexual intercourse. As far as consent comprehension was concerned, all of them understood.
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Enhanced D614G and Omicron Variants Antibody Persistence in Infants at 2 Months of Age Following Maternal mRNA Booster Vaccination During Pregnancy or Postpartum.
Pediatr Infect Dis J
November 2024
National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD.
Background: Following maternal COVID-19 vaccination, the persistence of antibodies in sera and breast milk for mothers and infants is not well characterized. We sought to describe the persistence of antibodies through 2 months after delivery in maternal and infant serum and breast milk following maternal COVID-19 mRNA vaccination and to examine differences by receipt of booster dose during pregnancy or postpartum.
Methods: This is a prospective cohort study with enrollment from July 2021 to January 2022 at 9 US academic sites.
High frequency CCR5 editing in human hematopoietic stem progenitor cells protects xenograft mice from HIV infection.
Nat Commun
January 2025
Ragon Institute of MGH, MIT and Harvard, Cambridge, MA, USA.
The only cure of HIV has been achieved in a small number of people who received a hematopoietic stem cell transplant (HSCT) comprising allogeneic cells carrying a rare, naturally occurring, homozygous deletion in the CCR5 gene. The rarity of the mutation and the significant morbidity and mortality of such allogeneic transplants precludes widespread adoption of this HIV cure. Here, we show the application of CRISPR/Cas9 to achieve >90% CCR5 editing in human, mobilized hematopoietic stem progenitor cells (HSPC), resulting in a transplant that undergoes normal hematopoiesis, produces CCR5 null T cells, and renders xenograft mice refractory to HIV infection.
View Article and Find Full Text PDFElephant in the room: natural killer cells don't forget HIV either.
Curr Opin HIV AIDS
December 2024
Division of Innate and Comparative Immunology, Center for Human Systems Immunology, Department of Surgery, Duke University School of Medicine, Durham, North Carolina, USA.
Purpose Of Review: Like elephants (and T cells), accumulating evidence suggest natural killer (NK) cells never forget. The description of adaptive or memory NK cells, which can be induced by HIV/SIV infections and vaccines and associated with protective effects in persons with HIV (PWH), has dramatically increased the interest in leveraging NK cells to prevent HIV infection or suppress HIV reservoirs. However, harnessing their full antiviral potential has been hindered by an incomplete understanding of mechanisms underlying adaptive NK cell development and infected cell recognition.
View Article and Find Full Text PDFRole of follicular homing natural killer cells in HIV infection.
Curr Opin HIV AIDS
January 2025
Department of Pathology and Laboratory Medicine, Emory Vaccine Center, Emory National Primate Research Center (ENPRC).
Purpose Of Review: Natural killer (NK) cells are integral components of the innate immune system, serving a vital function in eliminating virally infected cells. This review highlights the significance of CXCR5+ NK cells in the context of chronic HIV/SIV infection and viral control.
Recent Findings: Controlled HIV/SHIV infection results in a substantial increase in the population of CXCR5+ NK cells within the B-cell follicles of secondary lymphoid organs (SLOs).
An engineered immunogen activates diverse HIV broadly neutralizing antibody precursors and promotes acquisition of improbable mutations.
Sci Transl Med
January 2025
Duke Human Vaccine Institute, Duke University School of Medicine, Durham, NC 27710, USA.
Elicitation of HIV broadly neutralizing antibodies (bnAbs) by vaccination first requires the activation of diverse precursors, followed by successive boosts that guide these responses to enhanced breadth through the acquisition of somatic mutations. Because HIV bnAbs contain mutations in their B cell receptors (BCRs) that are rarely generated during conventional B cell maturation, HIV vaccine immunogens must robustly engage and expand B cells with BCRs that contain these improbable mutations. Here, we engineered an immunogen that activates diverse precursors of an HIV V3-glycan bnAb and promotes their acquisition of a functionally critical improbable mutation.
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