ABSTRACT
Enhanced Recovery After Surgery (ERAS) is a global surgical quality improvement initiative that has spread across numerous surgical disciplines. The uptake of ERAS in cesarean delivery in Canada is presently unknown. This study surveyed the current practices of Society of Obstetricians and Gynaecologists of Canada (SOGC) members with regards to ERAS guidelines for preoperative, intraoperative, and postoperative cesarean delivery care. Survey responses highlight perioperative practice variations across Canada. Active implementation of ERAS cesarean delivery guidelines could potentially lessen variations in perioperative care, improve patient outcomes, and minimize health care costs.
Subject(s)
Enhanced Recovery After Surgery , Canada , Cesarean Section , Female , Humans , Length of Stay , Perioperative Care , Pregnancy , Quality ImprovementABSTRACT
Islet transplantation is being considered as an alternative treatment for type 1 diabetes. Despite recent progress, transplant recipients continue to experience progressive loss of insulin independence. Cyanidin-3-O-Glucoside (C3G) has shown to be protective against damage that may lead to post-transplant islet loss. In this study, human islets cultured with or without C3G were treated with human amylin, Aß1-42, H2O2, or rapamycin to mimic stresses encountered in the post-transplant environment. Samples of these islets were collected and assayed to determine C3G's effect on cell viability and function, reactive oxygen species (ROS), oxidative stress, amyloid formation, and the presence of inflammatory as well as autophagic markers. C3G treatment of human islets exposed to either amylin or Aß1-42 increased cell viability (p<0.01) and inhibited amyloid formation (p<0.01). A reduction in ROS and an increase in HO-1 gene expression as well as in vitro islet function were also observed in C3G-treated islets exposed to amylin or Aß1-42, although not significantly. Additionally, treatment with C3G resulted in a significant reduction in the protein expression of inflammatory markers IL-1ß and NLRP3 (p<0.01) as well as an increase in LC3 autophagic marker (p<0.05) in human islets treated with amylin, Aß1-42, rapamycin, or H2O2. Thus, C3G appears to have a multi-faceted protective effect on human islets in vitro, possibly through its anti-oxidant property and alteration of inflammatory as well as autophagic pathways.
Subject(s)
Amyloid beta-Peptides/toxicity , Anthocyanins/pharmacology , Glucosides/pharmacology , Islet Amyloid Polypeptide/toxicity , Islets of Langerhans/cytology , Peptide Fragments/toxicity , Adult , Aged , Autophagy/drug effects , Biomarkers/metabolism , Cell Survival/drug effects , Cells, Cultured , Female , Gene Expression Regulation/drug effects , Heme Oxygenase-1/genetics , Heme Oxygenase-1/metabolism , Humans , Inflammation/pathology , Insulin Secretion/drug effects , Islets of Langerhans/ultrastructure , Middle Aged , Reactive Oxygen Species/metabolism , Young AdultABSTRACT
BACKGROUND: Genetically modified pigs (GMP) have been developed to alleviate the shortage of donors in human islet transplantation and rejection. In this study, we characterized and compared the islets from GalTKO, GalTKO/hCD46, GalTKO/hCD46/hCD39, and wild-type (WT) neonatal pigs. METHODS: Islets were isolated from GMP and WT pig pancreases that have been packaged with ice pack for at least 24 hours. The difference in gene expression and function of islets were evaluated by microarray analysis and transplantation of islets under the kidney capsule of streptozotocin-induced diabetic immune-deficient mice, respectively. Blood glucose levels of these mice were monitored weekly post-transplantation for >100 days, and islet grafts were collected and evaluated for the presence of endocrine cells. RESULTS: The genes involved in extracellular components, cell adhesion, glucose metabolism, and inflammatory response are differentially expressed between GMP and WT pig islets. Variation in the ability of pig islets in correcting the diabetic state of the mouse recipients appears to be dependent on the pig donor. In addition, prolonged cold ischemia time had a negative effect on the transplant outcome. All normoglycemic mice were able to respond well to glucose challenge despite the initial differences in the ability of islet transplants to reverse their diabetic state. Islet xenografts of normoglycemic mice contained abundant insulin- and glucagon-positive cells. CONCLUSION: The effect of GMP and WT neonatal pig islet transplants on hyperglycemia in mice appears to be dependent on the pig donor, and prolonged cold ischemia time negatively affects the neonatal pig islet transplant outcome.
