2,141 results match your criteria provide thermoregulation


Body Temperature and Activity Adaptation of Short Photoperiod-Exposed Djungarian Hamsters (): Timing, Traits, and Torpor.

Front Physiol 2021 7;12:626779. Epub 2021 Jul 7.

Institute of Neurobiology, Ulm University, Ulm, Germany.

To survive the Siberian winter, Djungarian hamsters () adjust their behavior, morphology, and physiology to maintain energy balance. The reduction of body mass and the improvement of fur insulation are followed by the expression of spontaneous daily torpor, a state of reduced metabolism during the resting phase to save additional energy. Since these complex changes require time, the upcoming winter is anticipated decreasing photoperiod. Read More

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Role of the Preoptic Area in Sleep and Thermoregulation.

Front Neurosci 2021 1;15:664781. Epub 2021 Jul 1.

Department of Neuroscience, Perelman School of Medicine, Chronobiology and Sleep Institute, University of Pennsylvania, Philadelphia, PA, United States.

Sleep and body temperature are tightly interconnected in mammals: warming up our body helps to fall asleep and the body temperature in turn drops while falling asleep. The preoptic area of the hypothalamus (POA) serves as an essential brain region to coordinate sleep and body temperature. Understanding how these two behaviors are controlled within the POA requires the molecular identification of the involved circuits and mapping their local and brain-wide connectivity. Read More

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Biological transformation - battery protection inspired by wound healing.

Bioinspir Biomim 2021 Jul 7. Epub 2021 Jul 7.

Safety Technology and Protective Structures, Fraunhofer-Institut für Kurzzeitdynamik Ernst-Mach-Institut EMI Institutsteil Efringen-Kirchen, Am Klingelberg 1, Efringen-Kirchen, 79588, GERMANY.

One of the major challenges for electric vehicle safety and mobility is the development of battery protection mechanisms that are able to cope with irregular and unpredictable heating of the battery unit. Biological protection mechanisms are considered to be one of the most effective and resilient mechanisms due to their ability to react dynamically and adaptively to unpredictable disturbances. Consequently, biological systems can be viewed as models for high resiliency that provide inpiration for tackling issues suchs as excessive resource consumption or low technical resilience. Read More

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The circadian system: From clocks to physiology.

Handb Clin Neurol 2021 ;179:233-247

Faculty of Medicine, Universidad Nacional Autónoma de México (UNAM), Ciudad de México, Mexico.

The circadian system, composed of the central autonomous clock, the suprachiasmatic nucleus (SCN), and systems of the body that follow the signals of the SCN, continuously change the homeostatic set points of the body over the day-night cycle. Changes in the body's physiological state that do not agree with the time of the day feedback to the hypothalamus, and provide input to the SCN to adjust the condition, thus reaching another set point required by the changed conditions. This allows the adjustment of the set points to another level when environmental conditions change, which is thought to promote adaptation and survival. Read More

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January 2021

The role of mound functions and local environment in the diversity of termite mound structures.

J Theor Biol 2021 Jul 1;527:110823. Epub 2021 Jul 1.

Florida State University, FAMU-FSU College of Engineering, Department of Mechanical Engineering, 2525 Pottsdamer St., Tallahassee, FL 32310, USA. Electronic address:

Mound structures that soil termites build have diverse morphologies. Previous observational studies documented that mounds are built to provide regulated environments for the termites that live within them and their structures are formed in ways to support this purpose under the influence of the mounds' immediate environment. The objective of this study is to provide a methodology and a predictive computational model to investigate the reason behind the different but systematic shapes of termite mounds, considering all the relevant forces imposed on them and their thermoregulatory and gas-exchange functions. Read More

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Maternal cold exposure induces distinct transcriptome changes in the placenta and fetal brown adipose tissue in mice.

BMC Genomics 2021 Jul 3;22(1):500. Epub 2021 Jul 3.

Gene Regulation and Metabolism, Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, Louisiana, 70808, USA.

Background: Brown adipose tissue (BAT) is specialized to dissipate energy in the form of heat. BAT-mediated heat production in rodents and humans is critical for effective temperature adaptation of newborns to the extrauterine environment immediately after birth. However, very little is known about whether and how fetal BAT development is modulated in-utero in response to changes in maternal thermal environment during pregnancy. Read More

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Thermal Effects of Topical Hyperbaric Oxygen Therapy in Hard-to-Heal Wounds-A Pilot Study.

Int J Environ Res Public Health 2021 Jun 23;18(13). Epub 2021 Jun 23.

Department and Clinic of Internal Medicine, Angiology and Physical Medicine, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, Batorego 15 St., 41-902 Bytom, Poland.

Clinical studies have been performed to evaluate the thermal response of topical hyperbaric oxygen therapy (THBOT) in patients suffering from hard-to-heal wounds diagnosed as venous leg ulcers located on their lower extremities. It was found that this therapy leads to a temperature decrease in areas around the wound. Moreover, a minor temperature differentiation between all areas was seen in the third period of topical hyperbaric oxygen therapy (THBOT) that may suggest that microcirculation and thermoregulation improvement start the healing process. Read More

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PGC1s and Beyond: Disentangling the Complex Regulation of Mitochondrial and Cellular Metabolism.

Int J Mol Sci 2021 Jun 27;22(13). Epub 2021 Jun 27.

Dipartimento di Scienze Farmacologiche e Biomolecolari, Università degli Studi di Milano, via Balzaretti 9, 20133 Milano, Italy.

Metabolism is the central engine of living organisms as it provides energy and building blocks for many essential components of each cell, which are required for specific functions in different tissues. Mitochondria are the main site for energy production in living organisms and they also provide intermediate metabolites required for the synthesis of other biologically relevant molecules. Such cellular processes are finely tuned at different levels, including allosteric regulation, posttranslational modifications, and transcription of genes encoding key proteins in metabolic pathways. Read More

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A Web-Based Nursing Education for Thermoregulation.

Authors:
Carri D Gest

J Nurses Prof Dev 2021 Jul-Aug 01;37(4):249-256

Carri D. Gest, MN, is Assistant Nurse Manager, Neonatal Intensive Care Unit, University of Washington Medical Center, Seattle.

Neonatal nurses provide essential care in the hospital setting for improving infants' morbidity and mortality outcomes by preventing hypothermia after delivery. This quality improvement project describes the development and implementation of a web-based educational activity, demonstrating that online education effectively increases nurse knowledge and commitment to thermoregulation practices. A learning management system provides nursing professional development practitioners an effective method of improving nursing knowledge using a web-based educational curriculum in the clinical setting. Read More

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Estimation of the time since death based on body cooling: a comparative study of four temperature-based methods.

Int J Legal Med 2021 Jun 19. Epub 2021 Jun 19.

Department of Forensic Medicine, University Hospital of Montpellier, Montpellier, France.

The estimation of the time since death is an important task in forensic medicine that mainly relies on body cooling in the early post-mortem period. The rectum has been traditionally used to determine the central core temperature after death, though the external auditory canal has been proposed as an alternative site by several authors. The objective of this study was to assess the ability of four body temperature-based methods (Henssge's rectal nomogram, Henssge's brain nomogram, and Baccino's both interval and global formulae based on ear temperature) to estimate the post-mortem interval (PMI). Read More

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Presynaptic inputs to vasopressin neurons in the hypothalamic supraoptic nucleus and paraventricular nucleus in mice.

Exp Neurol 2021 Sep 15;343:113784. Epub 2021 Jun 15.

Department of Pharmacology, School of Basic Medical Sciences, State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China. Electronic address:

Arginine vasopressin (AVP) neurons in the hypothalamic supraoptic nucleus (SON) and paraventricular nucleus (PVN) are involved in important physiological behaviors, such as controling osmotic stability and thermoregulation. However, the presynaptic input patterns governing AVP neurons have remained poorly understood due to their heterogeneity, as well as intermingling of AVP neurons with other neurons both in the SON and PVN. In the present study, we employed a retrograde modified rabies-virus system to reveal the brain areas that provide specific inputs to AVP neurons in the SON and PVN. Read More

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September 2021

Can offsetting the energetic cost of hibernation restore an active season phenotype in grizzly bears (Ursus arctos horribilis)?

J Exp Biol 2021 06 17;224(12). Epub 2021 Jun 17.

School of Biological Sciences, College of Arts and Sciences, Washington State University, Pullman, WA 99164, USA.

Hibernation is characterized by depression of many physiological processes. To determine if this state is reversible in a non-food caching species, we fed hibernating grizzly bears (Ursus arctos horribilis) dextrose for 10 days to replace 53% or 100% of the estimated minimum daily energetic cost of hibernation. Feeding caused serum concentrations of glycerol and ketones (β-hydroxybutyrate) to return to active season levels irrespective of the amount of glucose fed. Read More

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Fluid and electrolyte balance considerations for female athletes.

Eur J Sport Sci 2021 Jun 17:1-12. Epub 2021 Jun 17.

Physiology, Exercise, and Nutrition Research Group, Faculty of Health Sciences and Sport, University of Stirling, United Kingdom.

This review explores the effects of oestrogen and progesterone fluctuations across the menstrual cycle on fluid and electrolyte balance. The review aims to provide information on this topic for the exercising female but also for researchers working in this field. Beginning with a basic introduction to fluid and electrolyte balance, the review goes on to describe how oestrogen and progesterone have independent and integrated roles to play in the regulation of fluid and electrolyte balance. Read More

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Bumblebee resilience to climate change, through plastic and adaptive responses.

Glob Chang Biol 2021 Jun 12. Epub 2021 Jun 12.

Laboratory of Agrozoology, Department Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.

Bumblebees are ubiquitous, cold-adapted eusocial bees found worldwide from subarctic to tropical regions of the world. They are key pollinators in most temperate and boreal ecosystems, and both wild and managed populations are significant contributors to agricultural pollination services. Despite their broad ecological niche at the genus level, bumblebee species are threatened by climate change, particularly by rising average temperatures, intensifying seasonality and the increasing frequency of extreme weather events. Read More

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Thermoregulatory and physiological responses of nonpregnant, mid-gestation, and late-gestation sows exposed to incrementally increasing dry bulb temperature.

J Anim Sci 2021 Jul;99(7)

Livestock Behavior Research Unit, USDA-ARS, West Lafayette, IN 47907, USA.

Gestating sows may be more susceptible to increasing dry bulb temperatures (TDB) due to greater metabolic heat production and increased body mass, especially as gestation advances. However, there are few studies on the thermoregulatory and physiological responses of sows at differing gestation stages exposed to gradually increasing temperatures. The study objective was to determine the thermoregulatory and physiological responses of nonpregnant (n = 12; parity 3. Read More

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Adult skin acute stress responses to short-term environmental and internal aggression from exposome factors.

J Eur Acad Dermatol Venereol 2021 Jun 2. Epub 2021 Jun 2.

Department of Psychosomatic Medicine and Psychotherapy, Justus-Liebig University, Gießen, Germany.

Exposome factors that lead to stressed skin can be defined as any disturbance to homeostasis from environmental (meteorological factors, solar radiation, pollution or tobacco smoke) and/or internal exposure (unhealthy diet, hormonal variations, lack of sleep, psychosocial stress). The clinical and biological impact of chronic exposome effects on skin functions has been extensively reviewed, whereas there is a paucity of information on the impact of short-term acute exposure. Acute stress, which would typically last minutes to hours (and generally no more than a week), provokes a transient but robust neuroendocrine-immune and tissue remodelling response in the skin and can alter the skin barrier. Read More

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Thermogenic Fat: Development, Physiological Function, and Therapeutic Potential.

Int J Mol Sci 2021 May 31;22(11). Epub 2021 May 31.

Department of Physiology & Pharmacology, Thomas J. Long School of Pharmacy & Health Sciences, University of the Pacific, Stockton, CA 95211, USA.

The concerning worldwide increase of obesity and chronic metabolic diseases, such as T2D, dyslipidemia, and cardiovascular disease, motivates further investigations into preventive and alternative therapeutic approaches. Over the past decade, there has been growing evidence that the formation and activation of thermogenic adipocytes (brown and beige) may serve as therapy to treat obesity and its associated diseases owing to its capacity to increase energy expenditure and to modulate circulating lipids and glucose levels. Thus, understanding the molecular mechanism of brown and beige adipocytes formation and activation will facilitate the development of strategies to combat metabolic disorders. Read More

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Partial Deficiency of Zfp217 Resists High-Fat Diet-Induced Obesity by Increasing Energy Metabolism in Mice.

Int J Mol Sci 2021 May 20;22(10). Epub 2021 May 20.

Key Laboratory of Animal Genetics, Breeding and Reproduction Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.

Obesity-induced adipose tissue dysfunction and disorders of glycolipid metabolism have become a worldwide research priority. Zfp217 plays a crucial role in adipogenesis of 3T3-L1 preadipocytes, but about its functions in animal models are not yet clear. To explore the role of Zfp217 in high-fat diet (HFD)-induced obese mice, global Zfp217 heterozygous knockout (Zfp217) mice were constructed. Read More

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Effects of Pre-Exercise Ice Slurry Ingestion on Physiological and Perceptual Measures in Athletes with Spinal Cord Injuries.

Int J Exerc Sci 2021 1;14(2):19-32. Epub 2021 Apr 1.

United States Olympic Committee, Chula Vista, CA, USA.

Athletes with cervical level spinal cord injuries (SCI) have an impaired ability to thermoregulate during exercise, leading to an increased core temperature (T) due to a decrease in sweat response. Elevated T may result in premature onset of fatigue and decreased athletic performance. Therefore, precooling techniques that decrease T before exercise may increase the storage capacity for metabolic heat production, thereby delaying the time before reaching a critically high T. Read More

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A low-cost mouse cage warming system provides improved intra-ischemic and post-ischemic body temperature control - Application for reducing variability in experimental stroke studies.

J Neurosci Methods 2021 May 28;360:109228. Epub 2021 May 28.

Department of Neurology, McGovern Medical School, The University of Texas Health Science Center, Houston, TX, USA. Electronic address:

Background: Brain temperature is a strong determinant of ischemic stroke injury. For this reason, tight management of brain or body temperature (Tcore) in experimental rodent stroke models is recommended to improve the rigor and reproducibility of outcomes. However, methods for managing Tcore during and after stroke vary widely in approach and effectiveness. Read More

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Thermographic imaging of mouse across circadian time reveals body surface temperature elevation associated with non-locomotor body movements.

PLoS One 2021 28;16(5):e0252447. Epub 2021 May 28.

Department of Systems Biology, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto, Japan.

Circadian clocks orchestrate multiple different physiological rhythms in a well-synchronized manner. However, how these separate rhythms are interconnected is not exactly understood. Here, we developed a method that allows for the real-time simultaneous measurement of locomotor activity and body temperature of mice using infrared video camera imaging. Read More

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Field and laboratory metabolism and thermoregulation in rhinoceros auklets.

PeerJ 2021 18;9:e11460. Epub 2021 May 18.

Environmental Science Research Laboratory, Central Research Institute of Electric Power Industry, Abiko, Chiba, Japan.

Seabirds spend most of their lives at sea, except when visiting their breeding sites. Since the thermal conductivity of water is 25 times higher than that of air, seabirds resting on water lose heat and expend a considerable amount of energy for thermoregulation. For example, rhinoceros auklet (), a medium-sized (480620 g) alcid, spends most of its time floating on the sea. Read More

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Human cognitive functions and psycho-physiological responses under low thermal conditions in a simulated office environment.

Work 2021 ;69(1):197-207

Department of Ergonomics, School of Public Health and Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran.

Background: In office environments, thermal comfort is one of the most significant factor affecting employees' performance.

Objective: This study aimed to determine the effects of exposure to low air temperatures on human cognitive performance, physiological responses, and thermal perceptions during mental work.

Methods: Twenty-four volunteers with an age range of 18-30 years participated in this study. Read More

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Kidney physiology and pathophysiology during heat stress and the modification by exercise, dehydration, heat acclimation and aging.

Temperature (Austin) 2021 13;8(2):108-159. Epub 2020 Oct 13.

Department of Kinesiology, School of Public Health, Indiana University, Bloomington, IN, USA.

The kidneys' integrative responses to heat stress aid thermoregulation, cardiovascular control, and water and electrolyte regulation. Recent evidence suggests the kidneys are at increased risk of pathological events during heat stress, namely acute kidney injury (AKI), and that this risk is compounded by dehydration and exercise. This heat stress related AKI is believed to contribute to the epidemic of chronic kidney disease (CKD) occurring in occupational settings. Read More

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October 2020

Feet first: Adaptive growth in magellanic penguin chicks.

Ecol Evol 2021 May 13;11(9):4339-4352. Epub 2021 Mar 13.

Department of Biology University of Washington Seattle WA USA.

Growing animals should allocate their limited resources in ways that maximize survival. Seabird chicks must balance the growth of features and fat reserves needed to survive on land with those needed to successfully fledge and survive at sea. We used a large, 34-year dataset to examine energy allocation in Magellanic penguin chicks. Read More

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Food intake: an overlooked driver of climate change casualties?

Trends Ecol Evol 2021 08 7;36(8):676-678. Epub 2021 May 7.

Australian National University, Research School of Biology, Canberra, Australian Capital Territory (ACT), 2601, Australia.

Reduced voluntary food intake is a common response of endotherms to warmer temperatures. However, the implications of this are rarely considered for wild animals exposed to higher temperatures caused by climate change. We provide a conceptual model to demonstrate the potential consequences of elevated temperatures on food intake and survival. Read More

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Utilisation of far infrared-emitting garments for optimising performance and recovery in sport: Real potential or new fad? A systematic review.

PLoS One 2021 6;16(5):e0251282. Epub 2021 May 6.

Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, United Kingdom.

Background: Thanks to the specific materials they embed, far infrared (FIR)-emitting garments can interact with the body's physiological functions. Such effects have been sought in medicine and physiotherapy for a long time for the treatment/relief of a variety of pathologies and disabling conditions. Recently, FIR-emitting garments have been introduced in the sporting domain under the influence of manufacturers seeing here a new opportunity to support physical performance in athletes, though this is not clearly established. Read More

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Polycystic οvary syndrome revisited: An interactions network approach.

Eur J Clin Invest 2021 May 5:e13578. Epub 2021 May 5.

Clinical, Translational & Experimental Surgery Research Center, Biomedical Research Foundation of the Academy of Athens, Athens, Greece.

Background: The polycystic ovary syndrome (PCOS) has genetic, epigenetic, metabolic and reproductive aspects, while its complex pathophysiology has not been conclusively deciphered.

Aim: The goal of this research was to screen the gene/gene products associated with PCOS and to predict any possible interactions with the highest possible fidelity.

Materials And Methods: STRING v10. Read More

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Challenges in handling a civilian mass pediatric disaster during flood relief in a partially inundated armed forces medical facility.

J Emerg Manag 2021 Mar-Apr;19(2):173-188

Graded Specialist Pediatrics, Military Hospital Secunderabad, Hyderabad, India.

Background: Armed forces hospitals are often called upon to provide medical aid to civilians during natural calamities. Though children are often the most vulnerable segment of population in these events, research that addresses their unique needs and the role of armed forces hospitals remains sparse.

Objectives: We examined pediatric morbidity and mortality at a flooded armed forces hospital. Read More

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