Oral gavage of capsaicin causes TRPV1-dependent acute hypothermia and TRPV1-independent long-lasting increase of locomotor activity in the mouse

In this study, therefore, we examined the effects of oral gavage of CAP on core body and tail surface temperature, locomotor activity, and Fos expression in thermoregulation- and sensory information-associated hypothalamic and medullary brain regions using freely moving mice. Oral gavage of CAP acutely decreased core body temperature and alternatively increased tail surface temperature of wild type (WT) mice, whereas such acute temperature changes were not observed in TRPV1 knockout (KO) animals. Moreover, a long-lasting increase of locomotor activity was observed in both WT and TRPV1 KO mice after oral gavage of CAP, but increase in core body temperature was seen only in TRPV1 KO animals. Oral gavage of CAP induced neuronal Fos expression in the circumventricular organs, median and medial preoptic area, arcuate nucleus, and nucleus of the solitary tract, whereas neuronal Fos expression was scarcely observed in TRPV1 KO mice. Thus, the present study demonstrates in the mice that oral intake of CAP causes TRPV1-dependent acute hypothermia and TRPV1-independent long-lasting increase of locomotor activity, and moreover activates the brain circuits controlling thermoregulation and metabolism.
Source: Physiology and Behavior - Category: Physiology Source Type: research

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This study was aimed at evaluating the antimalarial effect of leaf latex and isolates obtained from Aloe megalacantha against chloroquine sensitive Plasmodium berghei ANKA strain in Swiss albino mice. Peters' 4-day suppressive test method was used to test the antimalarial activity of both leaves latex and isolates. Three isolates were obtained using thin layer chromatography and were coded as AM1, AM2, and AM3 in ascending order of their retention factor. After treatment of Plasmodium berghei infected mice with leaf latex of Aloe megalacantha for four days at 100, 200, and 400 mg/kg, it shows 30.3%, 43.4%, and 56.4%...
Source: Evidence-based Complementary and Alternative Medicine - Category: Complementary Medicine Tags: Evid Based Complement Alternat Med Source Type: research
Deep hypothermic perfusionless circulatory arrest was the first practical neuroprotective technique used for open-heart surgery. It was refined at the Novosibirsk Medical Research Center in Siberia and was actively used from the mid-1950s until 2001.This review describes the development of this technique and its contribution to our understanding of the dynamic changes in human physiology during induced hypothermia for circulatory arrest without extracorporeal perfusion. Deep hypothermic perfusionless circulatory arrest was an important stepping stone in the development of modern approaches in neuroprotection and monitoring...
Source: Journal of Cardiothoracic and Vascular Anesthesia - Category: Anesthesiology Authors: Tags: Special Article Source Type: research
Therapeutic hypothermia is the standard of clinical care for moderate neonatal hypoxic-ischemic encephalopathy. We investigated the independent and interactive effects of hypoxia-ischemia (HI) and temperature on neuronal survival and injury in basal ganglia and cerebral cortex in neonatal piglets. Male piglets were randomized to receive HI injury or sham procedure followed by 29 h of normothermia, sustained hypothermia induced at 2 h, or hypothermia with rewarming during fentanyl-nitrous oxide anesthesia. Viable and injured neurons and apoptotic profiles were counted in the anterior putamen, posterior putamen, and motor co...
Source: Developmental Neuroscience - Category: Neuroscience Source Type: research
Abstract PURPOSE OF REVIEW: Optimizing the management of deceased organ donors focuses on providing critical care that prevents, mitigates, or repairs the pathophysiologic sequelae of brain death. This review discusses protocol-based care; approaches to monitoring, resuscitation, hormone replacement therapy, and respiratory management; and the potential of various additional donor therapies. RECENT FINDINGS: Protocol-based critical care after the determination of brain death has the potential to substantially increase the quantity and improve the quality of organs available for transplantation. Close hemodyna...
Source: Current Opinion in Organ Transplantation - Category: Transplant Surgery Authors: Tags: Curr Opin Organ Transplant Source Type: research
The objective of this study was to assess gastrointestinal (GI) blood flow and left ventricle output (LVO) in infants with hypoxic-ischemic encephalopathy during whole body TH and after rewarming.
Source: Pediatrics and Neonatology - Category: Perinatology & Neonatology Authors: Tags: Original Article Source Type: research
ada D Abstract Neonatal hypoxic-ischaemic encephalopathy due to the lack of oxygen at birth can have severe neurological consequences, such as cerebral palsy, or even the death of the asphyxiated newborn. Hypothermia is currently the only therapy included in intensive care neonatal units. This shows a clinical benefit in neonates suffering from hypoxic-ischaemic encephalopathy, mainly because of its ability to decrease the accumulation of excitatory amino acids and its anti-inflammatory, antioxidant, and anti-apoptotic effects. However, hypothermia is not effective in half of the cases, making it necessary to sear...
Source: Anales de Pediatria - Category: Pediatrics Authors: Tags: An Pediatr (Barc) Source Type: research
We report the case of a female patient who underwent late reoperation following endocarditis surgery. The patient first underwent surgery at 22 years of age for endocarditis with aortic and tricuspid insufficiency. She underwent aortic root replacement with a homograft and tricuspid valve replacement with a tissue valve. Coronary artery bypass using the internal thoracic artery and ligation of the left main coronary artery were performed. Ten years later, failure of the homograft and the tricuspid valve developed. In the second operation, the patient underwent a successful Bentall operation and tricuspid valve replacement ...
Source: Korean Journal of Thoracic and Cardiovascular Surgery - Category: Cardiovascular & Thoracic Surgery Tags: Korean J Thorac Cardiovasc Surg Source Type: research
Purpose of review Optimizing the management of deceased organ donors focuses on providing critical care that prevents, mitigates, or repairs the pathophysiologic sequelae of brain death. This review discusses protocol-based care; approaches to monitoring, resuscitation, hormone replacement therapy, and respiratory management; and the potential of various additional donor therapies. Recent findings Protocol-based critical care after the determination of brain death has the potential to substantially increase the quantity and improve the quality of organs available for transplantation. Close hemodynamic monitoring with ...
Source: Current Opinion in Organ Transplantation - Category: Surgery Tags: ETHICAL CONSIDERATIONS OF ALLOCATION: Edited by David A. Axelrod Source Type: research
Mortality for neonates requiring surgery for serious pathology such as NEC, remains high. Damage control surgery (DCS) has evolved as an operative strategy in battlefield trauma that sacrifices the completeness of the initial surgery to address the deadly triad of acidosis, hypothermia and coagulopathy. This approach is now used routinely in sick adults with nontrauma surgical emergencies. Here we describe our experience of using DCS in neonates.
Source: Journal of Pediatric Surgery - Category: Surgery Authors: Source Type: research
Conclusions: Topiramate reduced seizures in patients achieving therapeutic levels in the first hours after treatment initiation; however, they represented only a part of the study population. Our results warrant further studies with higher loading and maintenance dosing of topiramate.Neonatology 2019;116:76 –84
Source: Neonatology - Category: Perinatology & Neonatology Source Type: research
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