To partly or completely satisfy the increasing demand for insulin, pregnant rats were infused SC with human insulin (2.4 or 4.8 IU/day) from day 14 to day 20 of gestation. Cyclic control rats underwent the same procedure of 6 days of insulin-treatment. During the treatment all groups of rats were hypoglycaemic, but foetal survival was not affected. The low dose treatment prevented the characteristic rise of the insulin response to a glucose challenge during pregnancy, both in vivo and in vitro, while the high dose treatment suppressed the insulin response, as well as the pancreatic insulin content. The insulin responses and insulin contents of pregnant rats were higher than those of the corresponding cyclic control rats. These results support the hypothesis that during gestation the increased insulin demand, due to the actions of placental hormones, is the cause of the increased insulin secretion. However, it cannot be excluded that direct effects of placental hormones on the islets of Langerhans are also involved.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/0031-9384(95)00080-3 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
PIM1 enhances insulin secretion and inhibits ferroptosis of high glucose-induced pancreatic β-cells through strengthening PINK1/Parkin-mediated mitophagy via inactivating JNK/p38 signaling pathway.
Tissue Cell
January 2025
Department of Endocrinology, Fuyang Cancer Hospital, Fuyang, Anhui Province 236000, PR China. Electronic address:
Background: Diabetes mellitus (DM), a chronic metabolic disease, is characterized by long-term hyperglycemia resulting from the defect of insulin production and insulin resistance. The damage and dysfunction of pancreatic β-cells is a main link in DM development.
Methods: In this work, pancreatic β-cell line INS-1E cells were exposed to 30 mM glucose for 48 h to construct an in vitro DM model.
Effects of Acute Aerobic Exercise on Skeletal Muscle and Liver Glucose Metabolism in Male Rodents with Type 1 Diabetes.
Can J Physiol Pharmacol
January 2025
Western University Faculty of Health Sciences, School of Kinesiology, London, Ontario, Canada.
Aerobic exercise (AE) is associated with a significant hypoglycemia risk in individuals with type 1 diabetes mellitus (T1DM). However, the mechanisms in the liver and skeletal muscle governing exercise-induced hypoglycemia in T1DM are poorly understood. This study examined the effects of a 60-minute bout of AE on hepatic and muscle glucose metabolism in T1DM rats.
View Article and Find Full Text PDFDuodenal-jejunal bypass ameliorates MASLD in rats by regulating gut microbiota and bile acid metabolism through FXR pathways.
Hepatol Commun
February 2025
Department of Gastroenterology, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.
Background: Although bariatric and metabolic surgical methods, including duodenal-jejunal bypass (DJB), were shown to improve metabolic dysfunction-associated steatotic liver disease (MASLD) in clinical trials and experimental rodent models, their underlying mechanisms remain unclear. The present study therefore evaluated the therapeutic effects and mechanisms of action of DJB in rats with MASLD.
Methods: Rats with MASLD were randomly assigned to undergo DJB or sham surgery.
The TRP Channels Serving as Chemical-to-Electrical Signal Converter.
Physiol Rev
January 2025
Department of Physiology and Membrane Biology, University of California, Davis, School of Medicine, Davis CA, 95616, USA.
Biology uses many signaling mechanisms. Among them, calcium and membrane potential are two prominent mediators for cellular signaling. TRPM4 and TRPM5, two calcium-activated monovalent cation-conducting ion channels, offer a direct linkage between these two signals.
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!