Monoclonal antibodies to ovine lymphocyte surface antigens were used in an immunohistochemical study of the intestine of sheep. In the epithelium CD8+ cells predominated whereas the majority of lamina propria T lymphocytes were CD4+. Infection of sheep with the parasitic nematode Trichostrongylus colubriformis including sufficiently large numbers of parasites to induce protective immunity did not alter the number of CD4+ or CD8+ lymphocytes in the intestinal mucosa. In contrast, exposure of naive sheep to a single large infection of T. colubriformis resulted in a substantial decrease in number of CD8+ cells and moderate decreases in number of CD4+ cells in the duodenal but not the jejunal mucosa. MHC class II antigens were not detected either in or on epithelial cells of the sheep small intestine.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1541552 | PMC |
Publication Analysis
Top Keywords
Similar Publications
PMA1-containing extracellular vesicles of triggers immune responses and colitis progression.
Gut Microbes
December 2025
Department of Oncology, Nanjing Drum Tower Hospital, State Key Laboratory of Pharmaceutical Biotechnology, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China.
() exhibits aberrant changes in patients with colitis, and it has been reported to dominate the colonic mucosal immune response. Here, we found that PMA1 expression was significantly increased in from patients with IBD compared to that in healthy controls. A Crispr-Cas9-based fungal strain editing system was then used to knock out PMA1 expression in .
View Article and Find Full Text PDFAlterations of the Intestinal Mucosal Barrier and Gut Fungal Microbiome in Asymptomatic HIV-Infected Patients.
Can J Infect Dis Med Microbiol
December 2024
School of Medicine, University of Electronic Science and Technology of China, Chengdu, China.
Damage to the intestinal mucosal barrier and dysbiosis of the gut microbiota are critical factors in HIV progression, reciprocally influencing each other. Besides bacteria, the fungal microbiota, a significant component of the gut, plays a pivotal role in this dysregulation. This study aims to investigate changes in the gut mucosal barrier and mycobiota during the initial stages of HIV infection, focusing on the involvement of intestinal fungi and their secretions in mucosal damage.
View Article and Find Full Text PDFMechanistic study of the effect of a high-salt diet on the intestinal barrier.
Sci Rep
January 2025
School of Health Preservation and Rehabilitation, Chengdu University of TCM, Shierqiao Road, Chengdu, 610075, Sichuan, People's Republic of China.
Despite the established link between chronic high salt diet (HSD) and an increase in gut inflammation, the effect of HSD on the integrity of the intestinal barrier remains understudied. The present study aims to investigate the impact of HSD on the intestinal barrier in rats, encompassing its mechanical, mucous, and immune components. Expression levels of intestinal tight junction proteins and mucin-2 (MUC2) in SD rats were analyzed using immunofluorescence.
View Article and Find Full Text PDFTofacitinib and budesonide treatment affect stemness and chemokine release in IBD patient-derived colonoids.
Sci Rep
January 2025
Department of Clinical and Molecular Medicine (IKOM), Faculty of Medicine and Health Sciences, NTNU - Norwegian University of Science and Technology, Prinsesse Kristinas gt. 1, Trondheim, 7030, Norway.
Restoration of the intestinal epithelial barrier is crucial for achieving mucosal healing, the therapeutic goal for inflammatory bowel disease (IBD). During homeostasis, epithelial renewal is maintained by crypt stem cells and progenitors that cease to divide as they differentiate into mature colonocytes. Inflammation is a major effector of mucosal damage in IBD and has been found to affect epithelial stemness, regeneration and cellular functions.
View Article and Find Full Text PDFIntestine versus liver? Uncovering the hidden major metabolic organs of silybin in rats.
Drug Metab Dispos
January 2025
Jiangsu Provincial Key Laboratory of Drug Metabolism and Pharmacokinetics, Research Unit of PK-PD Based Bioactive Components and Pharmacodynamic Target Discovery of Natural Medicine of Chinese Academy of Medical Sciences, China Pharmaceutical University, Nanjing, China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China. Electronic address:
Silybin, a milk thistle extract, is a flavonolignan compound with hepatoprotective effect. It is commonly used in dietary supplements, functional foods, and nutraceuticals. However, the metabolism of silybin has not been systematically characterized in organisms to date.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!