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GM-CSF treatment of frozen bovine sperm improves function, fertilization, and subsequent embryo development.
Theriogenology
January 2025
Robinson Research Institute, The University of Adelaide, South Australia, Australia; Discipline of Reproduction and Development, School of Biomedicine, The University of Adelaide, South Australia, Australia. Electronic address:
In vitro embryo production (IVP) is used in the cattle industry to increase the rate of genetic gain. IVP uses semen that has been frozen and thawed, a process that renders sperm less viable than sperm from fresh semen. Granulocyte macrophage colony stimulating factor (GM-CSF) is present in bovine seminal plasma, while its receptor is present on bovine sperm.
View Article and Find Full Text PDFTargeted deletion of the pancreatic β-cell oxytocin receptor and its effects on metabolic regulation and β-cell health.
Front Endocrinol (Lausanne)
January 2025
Department of Psychology, University of Miami, Coral Gables, FL, United States.
The neuropeptide oxytocin (OXT) and its receptor (OXTR) have been shown to play an important role in glucose metabolism, and pancreatic islets express this ligand and receptor. In the current study, OXTR expression was identified in α-, β-, and δ-cells of the pancreatic islet by RNA hybridization, and OXT protein expression was observed only in β-cells. In order to examine the contribution of islet OXT/OXTR in glycemic control and islet β-cell heath, we developed a β-cell specific OXTR knock-out (β-KO) mouse.
View Article and Find Full Text PDFL-type Calcium Channel Blockade Worsens Glucose Tolerance and β-Cell Function in C57BL6/J Mice Exposed to Intermittent Hypoxia.
Am J Physiol Endocrinol Metab
January 2025
Division of Pulmonary, Critical Care, and Sleep Medicine, University of Miami, Miller School of Medicine, Miami Florida.
Intermittent hypoxemia (IH), a pathophysiologic consequence of obstructive sleep apnea (OSA), adversely affects insulin sensitivity, insulin secretion, and glucose tolerance. Nifedipine, an L-type calcium channel blocker frequently used for treatment of hypertension, can also impair insulin sensitivity and secretion. However, the cumulative and interactive repercussions of IH and nifedipine on glucose homeostasis have not been previously investigated.
View Article and Find Full Text PDFNLRP3 inflammasome-modulated angiogenic function of EPC via PI3K/ Akt/mTOR pathway in diabetic myocardial infarction.
Cardiovasc Diabetol
January 2025
Department of Clinical Pharmacy, School of Preclinical Medicine and Clinical Pharmacy, China Pharmaceutical University, 24 Tong jia Lane, Nanjing, 210009, People's Republic of China.
Background: Inflammatory diseases impair the reparative properties of endothelial progenitor cells (EPC); however, the involvement of diabetes in EPC dysfunction associated with myocardial infarction (MI) remains unknown.
Methods: A model was established combining high-fat diet (HFD)/streptozotocin (STZ)-induced diabetic mice with myocardial infarction. The therapeutic effects of transplanted wild-type EPC, Nlrp3 knockout EPC, and Nlrp3 overexpression EPC were evaluated.
A dissociated glucocorticoid receptor modulator mitigates glucolipotoxicity in the endocrine pancreas and peripheral tissues: Preclinical data from a mouse model of diet-induced type 2 diabetes.
Life Sci
January 2025
Immuno-Endocrinology, Diabetes & Metabolism Laboratory, Instituto de Investigaciones en Medicina Traslacional (IIMT), CONICET - Universidad Austral, Pilar, Argentina; Facultad de Ciencias Biomédicas, , Universidad Austral, Pilar, Argentina. Electronic address:
Aims: Type 2 diabetes (T2D) is a prevalent metabolic disease linked to obesity and metabolic syndrome (MS). The glucolipotoxic environment (GLT) impacts tissues causing low-grade inflammation, insulin resistance and the gradual loss of pancreatic β-cell function, leading to hyperglycemia. We have previously shown that Compound A (CpdA), a plant-derived dissociative glucocorticoid receptor-modulator with inflammation-suppressive activity, displays protective effects on β-cells in type 1 diabetes murine models.
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