In this study, we investigated whether a type of retroviral interference might be one mechanism that mediates the powerful protection induced by live attenuated SIVC8. Our results show that retroviral interference could be demonstrated between SIV and SHIV-HXBc2 in human T-cell lines chronically infected with either SIVC8 or SIVJ5. Lymphocytes from macaques infected with live attenuated SIVC8 were significantly less sensitive (P < 0.05) to in vitro infection by virulent SIVJ5 and SHIV-HXBc2 than were lymphocytes from naive controls. However, this significant difference in the sensitivity of lymphocytes to virus infection was not observed for more efficiently replicating viruses such as SHIVSF33 and SIVsm3. Virus growth was significantly enhanced (P < 0.01) by depletion of CD8+ T-cells, suggesting a role for these cells in the control of SIV replication, both in vitro and in vivo. We found that levels of the beta-chemokines regulated upon activation, normal T-cell expressed and secreted, macrophage inflammatory protein-1alpha and macrophage inflammatory protein-1beta did not correlate with inhibition of virus replication. Taken together, our findings do not support the hypothesis that retroviral interference is the mechanism by which live attenuated SIVC8 induces protection.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1111/j.1600-0684.2001.300101.x | DOI Listing |
Front Immunol
January 2025
Research Institute of Internal Medicine, Oslo University Hospital, Rikshospitalet and University of Oslo, Oslo, Norway.
Introduction: CD38, a regulator of intracellular calcium signalling, is highly expressed in immune cells. Mice lacking CD38 are very susceptible to acute bacterial infections, implicating CD38 in innate immune responses. The effects of CD38 inhibition on NLRP3 inflammasome activation in human primary monocytes and monocyte-derived macrophages have not been investigated.
View Article and Find Full Text PDFInt Immunopharmacol
January 2025
Department of Dermatovenereology, Tianjin Medical University General Hospital/Tianjin Institute of Sexually Transmitted Disease, Tianjin 300052, China. Electronic address:
Background: Chlamydia trachomatis (Ct) is the leading cause of tubal inflammation in women, with a high tendency for persistent asymptomatic infections. Antibiotics are currently the primary treatment for Ct infections of the reproductive tract. However, mounting evidence indicates an increasing incidence of persistent infections and recurrence due to antibiotic treatment failure, highlighting the urgent need for novel therapeutic approaches.
View Article and Find Full Text PDFGeriatr Psychol Neuropsychiatr Vieil
December 2024
Service hospitalo-universitaire de gériatrie clinique, centre hospitalier universitaire Grenoble-Alpes, Grenoble, France.
The risk of herpes zoster (HZ) and postherpetic neuralgia (PHN) increases rapidly after the age of 50 years old. The incidence of herpes zoster and PHN appears to be correctly measured albeit irregularly and the immediate and long-term complications are so poorly measured that the perception of a benign disease remains entrenched among professionals and in the general population. Because acute-phase treatments are only marginally effective in reducing the severity and duration of complications, zoster vaccines have been developed over the last twenty years.
View Article and Find Full Text PDFClin Transl Med
January 2025
State Key Laboratory of Reproductive Medicine and Offspring Health, Nanjing Medical University, Nanjing, China.
Background: Numerous pathogenic variants causing human oocyte maturation arrest have been reported on the primate-specific TUBB8 gene. The main etiology is the dramatic reduction of tubulin α/β dimer, but still large numbers of variants remain unexplained.
Methods: Using microinjection mRNA and genome engineering to reintroduce the conserved pathogenic missense variants into oocytes or in generating TUBB8 variant knock-in mouse models, we investigated that the human deleterious variants alter microtubule nucleation and spindle assembly during meiosis.
BMC Infect Dis
January 2025
Division of Animal Biotechnology, Faculty of Veterinary Sciences & Animal Husbandry, SKUAST Kashmir, Shuhama, J&K, 190006, India.
Background: Salmonella infections represent a major global public health concern due to their widespread zoonotic transmission, antimicrobial resistance, and associated morbidity and mortality. This review aimed to summarize the zoonotic nature of Salmonella, the challenges posed by antimicrobial resistance, the global burden of infections, and the need for effective vaccination strategies to mitigate the rising threat of Salmonella.
Methods: A systematic review of literature was conducted using databases such as PubMed, Scopus, Web of Science, and Google Scholar.
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!