The role of catecholamines in shock metabolism in dogs was studied by comparing the metabolism of shock due to cardiac tamponade, shock with catecholamine depletion from prior reserpine adminstration and metabolism in the normal dog with continuous epinephrine infusion. It was concluded that the high serum concentrations of catecholamines in shock probably cause the increased blood lactate, initial hyperglycemia and, possibly, the poor free fatty acid oxidation seen in shock, but do not cause the increased protein catabolism of shock. With the simultaneous infusion of glucagon, cortisol and epinephrine in physiologic dosages, catabolic metabolism similar to that observed in shock was established in the normal dog. Lactacidemia, hyperglycemia, poor ability to oxidize free fatty acid and massive protein breakdown were observed. The decreased metabolic rate and diminished fatty acid mobilization of shock were not duplicated in those in the normal group and are probably a function of hypoperfusion. The importance of these observations is that impaired use of fat and increased protein breakdown, as seen in shock and trauma, are mediated by hormonal changes. It follows that there may be the opportunity to reverse or modify this catabolism by hormonal manipulation in the surgical patient.
Download full-text PDF |
Source |
---|
Environ Sci Technol
January 2025
School of Marine Sciences, Zhuhai Key Laboratory of Marine Bioresources and Environment, Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Pearl River Estuary Marine Ecosystem Research Station, Ministry of Education, Sun Yat-Sen University, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China.
Increasing evidence suggests that organohalogen contaminants (OHCs) could disrupt lipid metabolism in organisms, prompting consideration of fatty acids (FAs) as biological tools for assessing chemical stress in biological systems. This study examined 87 OHCs and 32 FAs in two sentinel cetacean species─Indo-Pacific humpback dolphins ( = 128) and Indo-Pacific finless porpoises ( = 26)─from the northern South China Sea (NSCS), a global hotspot for OHCs. Our results revealed higher OHC levels in these cetaceans than global averages.
View Article and Find Full Text PDFJ Dent Sci
January 2025
School of Dentistry, Chung Shan Medical University, Taichung, Taiwan.
Background: : The metabolic by-product butyric acid of Gram-negative anaerobic bacteria can invoke pathological effects on periodontal cells resulting in inflammation and further destruction of periodontium. However, limited researches on the effects of butyric acid on cementoblasts were reported. Therefore, this study aimed to investigate the type of cell death in murine cementoblast (OCCM.
View Article and Find Full Text PDFFront Cell Infect Microbiol
January 2025
Center of Reproductive Medicine, Shengjing Hospital of China Medical University, Shenyang, China.
Objective: To investigate the roles of fecal short-chain fatty acids (SCFAs) in polycystic ovary syndrome (PCOS).
Methods: The levels of SCFAs (acetate, propionate, and butyrate) in 83 patients with PCOS and 63 controls were measured, and their relationships with various metabolic parameters were analyzed. Intestinal microbiome analysis was conducted to identify relevant bacteria.
Life Metab
December 2023
Center of Basic Medical Research, Institute of Medical Innovation and Research, Peking University Third Hospital, Beijing 100191, China.
In recent decades, the global prevalence of metabolic syndrome has surged, posing a significant public health challenge. Metabolic disorders, encompassing diabetes, obesity, nonalcoholic fatty liver disease, and polycystic ovarian syndrome, have been linked to alterations in the gut microbiota. Nonetheless, the connection between gut microbiota and host metabolic diseases warrants further investigation.
View Article and Find Full Text PDFLife Metab
December 2023
Department of Physiology and Pathophysiology, School of Basic Medical Sciences, and Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Peking University, Beijing 100191, China.
The "gut-liver axis" is critical for the control of hepatic lipid homeostasis, where the intestine affects the liver through multiple pathways, such as nutrient uptake, gastrointestinal hormone release, and gut microbiota homeostasis. Whether intestine-originated exosomes mediate the gut's influence on liver steatosis remains unknown. Here, we aimed to determine whether intestinal epithelium-derived exosomes (intExos) contribute to the regulation of hepatic lipid metabolism.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!