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Nonselective beta blockade enhances gut microbiome diversity in a rodent model of trauma, hemorrhage, and chronic stress.
J Trauma Acute Care Surg
November 2024
From the Department of Surgery and Sepsis and Critical Illness Research Center (J.A.M., L.S.K., E.E.P., C.G.A., K.B.K., L.E.B., P.A.E., A.M.M.), University of Florida College of Medicine, Gainesville; and The Gut Biome Lab, Department of Health, Nutrition, and Food Sciences (G.P., R.N.), Florida State University College of Education, Health, and Human Sciences, Tallahassee, Florida.
Background: Traumatic injury leads to gut dysbiosis with changes in microbiome diversity and conversion toward a "pathobiome" signature characterized by a selective overabundance of pathogenic bacteria. The use of non-selective beta antagonism in trauma patients has been established as a useful adjunct to reduce systemic inflammation. We sought to investigate whether beta-adrenergic blockade following trauma would prevent the conversion of microbiome to a "pathobiome" phenotype.
View Article and Find Full Text PDFSuccessful thoracoscopic-assisted resection of a functional paraganglioma in the mediastinum with extracorporeal circulation: a case report.
J Cardiothorac Surg
January 2025
Department of Thoracic Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan, P. R. China.
Background: Paragangliomas are rare neoplasms arising from extra-adrenal chromaffin cells, with mediastinal paragangliomas representing an exceptionally rare subset. This report details the surgical management of a complex mediastinal paraganglioma case, presenting with refractory hypertension and invasion of critical surrounding structures. A comprehensive review of the current literature is included to underscore existing cases, enhance clinical awareness, and share our insights and experience in the diagnosis and treatment of this challenging condition.
View Article and Find Full Text PDFSeparate and combined blockades of α- and β-adrenergic receptors in forearm sweating induced by adrenergic agents and exercise in the heat in young adults.
Am J Physiol Regul Integr Comp Physiol
December 2024
Institute of Health and Sport Sciences, University of Tsukuba, Tsukuba City, Japan.
The assessment of adrenergic modulation of sweating as assessed via pharmacologic administration of α- and β-adrenergic receptor blockers during exercise has yielded mixed findings. However, the underlying mechanisms for this disparity remains unresolved. We investigated the effects of separate and combined blockade of α- and β-adrenergic receptors on forearm sweating induced by a 30-min moderate-intensity exercise bout (n=17, protocol 1) and the administration of adrenergic agonists epinephrine and norepinephrine (n=16, protocol 2) in the heat.
View Article and Find Full Text PDFUnexpected pheochromocytoma leading to cardiac arrest during the perioperative period: a case report and literature review.
BMC Anesthesiol
December 2024
Department of Anaesthesiology, The Fourth Affiliated Hospital, School of Medicine, Zhejiang University, Yiwu, Zhejiang, 322000, China.
Background: Pheochromocytomas (PCCs) are rare neuroendocrine catecholamine (CA)-secreting tumours that originate from chromaffin tissue and can produce and store CAs. Unexpected PCCs pose a serious threat to the perioperative safety of patients and a considerable challenge to anaesthesiologists because of the risks of fatal hypertensive crises and other stresses.
Case Presentation: A 37-year-old woman who was scheduled for tonsillectomy and palatopharyngoplasty under general anaesthesia experienced a malignant cardiovascular event after induction, which was characterized mainly by a sharp increase in heart rate and blood pressure, ultimately leading to cardiac arrest and the occurrence of secondary long QT syndrome.
Beta-adrenergic blockade via atenolol negatively affects body and heart mass and renal morphology in the developing chicken (Gallus Gallus Domesticus).
Comp Biochem Physiol C Toxicol Pharmacol
November 2024
Developmental Integrative Biology Group, The University of North Texas, 1155 Union Circle, Denton, TX 76203, USA. Electronic address:
Atenolol is a widely prescribed β-cardioselective blocker. We studied atenolol effects on cardiac and renal development in day 18 (D18) chicken embryos. Embryos were dosed with atenolol (3 μg atenolol/g estimated embryo mass) for three days during one of the mesonephric kidney stage (D7-D9), mesonephric-metanephric stage (D11-D13), or metanephric stage (D15-D17), and then sampled on D18.
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