This study determined if intracolonically applied prostaglandin E1 analogue (misoprostol) had a mucosal protective effect in rats with 4% acetic acid-induced colitis. The effects of misoprostol were compared with those of 5-aminosalicylic acid and betamethasone. A single application of 4% acetic acid induced an experimental colitis which was maximal at 2 days and showed spontaneous macroscopic and histologic healing by 12 days. Misoprostol (100 micrograms/kg), but not 5-aminosalicylic acid or betamethasone, administered 30 min before induction of colitis, provided macroscopic and histologic colonic mucosal protection but not protection of in vivo fluid absorption. The mucosal protective effect of misoprostol was time, dose, and diluent volume dependent. In the presence of misoprostol-induced colonic morphologic but not functional absorptive mucosal protection, in vitro unidirectional sodium and chloride flux measurements showed protection of theophylline-stimulated chloride secretion but not sodium absorption. Protection of in vivo colonic fluid absorption, in addition to morphologic protection, could be achieved when misoprostol was administered between 2 and 16 min before induction of colitis or when the highest dose (1000 micrograms/kg) of misoprostol was examined. We conclude that intracolonic misoprostol administration provides unique mucosal protective effects in experimental colitis.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/0016-5085(90)90280-e | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
n-butanol extract of Pulsatilla decoction alleviates vulvovaginal candidiasis via the regulation of mitochondria-associated Type I interferon signaling pathways.
J Ethnopharmacol
December 2024
Department of Pathogenic Biology and Immunology, College of Integrated Chinese and Western Medicine (College of Life Science), Anhui University of Chinese Medicine, Hefei, China; Institute of Integrated Traditional Chinese and Western Medicine, Anhui University of Chinese Medicine, Hefei, China; Anhui Province Key Laboratory of Chinese Medicinal Formula, Hefei, China. Electronic address:
Ethnopharmacological Relevance: Vulvovaginal candidiasis (VVC) is a relatively common fungal infectious disease in the female reproductive tract. The pathogenesis of VVC not only involves Candida albicans (C. albicans) infection, but also the improper immune response of the vaginal mucosal immune system to the fungus.
View Article and Find Full Text PDFMulti-omics analysis reveals the pre-protective mechanism of Dendrobium flexicaule polysaccharide against alcohol-induced gastric mucosal injury.
Int J Biol Macromol
December 2024
College of Pharmacy, Hubei University of Chinese Medicine, Wuhan 430065, China; Hubei Shizhen Laboratory, Wuhan 430065, China. Electronic address:
Dendrobium flexicaule (DF) is an endemic plant primarily found in the mountains of central China with important medicinal and edible values. In traditional Chinese medicine, DF has the effects of nourishing stomach and "Yin", and clearing heat. At present, no studies have explored the mechanisms by which Dendrobium flexicaule polysaccharides (DFP) exert pre-protect effects against alcohol-induced gastric mucosal injury.
View Article and Find Full Text PDFButyrolactone-I from Marine Fungal Metabolites Mitigates Heat-Stress-Induced Apoptosis in IPEC-J2 Cells and Mice Through the ROS/PERK/CHOP Signaling Pathway.
Mar Drugs
December 2024
Marine Medical Research and Development Centre, Shenzhen Institute of Guangdong Ocean University, Shenzhen 518120, China.
Heat stress poses a significant challenge to animal husbandry, contributing to oxidative stress, intestinal mucosal injury, and apoptosis, which severely impact animal health, growth, and production efficiency. The development of safe, sustainable, and naturally derived solutions to mitigate these effects is critical for advancing sustainable agricultural practices. Butyrolactone-I (BTL-I), a bioactive compound derived from deep-sea fungi (Aspergillus), shows promise as a functional feed additive to combat heat stress in animals.
View Article and Find Full Text PDFTransgenic as a Promising Oral Vaccine Carrier: Potential Application in the Aquaculture Industry.
Mar Drugs
December 2024
State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China.
SR21, a kind of eukaryotic heterotrophic organism rich in unsaturated fatty acids, is an emerging microbial alternative to fish oil. The dietary inclusion of 15% SR21 was optimal for the growth performance of zebrafish. Previous studies demonstrated that fructose-1,6-bisphosphate aldolase (FBA) of is a valuable broad-spectrum antigen against various pathogens in aquaculture (e.
View Article and Find Full Text PDFLipid nanoparticles encapsulating both adjuvant and antigen mRNA improve influenza immune cross-protection in mice.
Biomaterials
December 2024
Center for Inflammation, Immunity & Infection, Institute for Biomedical Science, Georgia State University, Atlanta, GA, USA. Electronic address:
The rapid approval of SARS-CoV-2 mRNA lipid nanoparticle (LNP) vaccines indicates the versatility of mRNA LNPs in an urgent vaccine need. However, the mRNA vaccines do not induce mucosal cellular responses or broad protection against recent variants. To improve cross-protection of mRNA vaccines, here we engineered a pioneered mRNA LNP encapsulating with mRNA constructs encoding cytokine adjuvant and influenza A hemagglutinin (HA) antigen for intradermal vaccination.
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!