Journal of thermal biology最新文献

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The δPON index as a headache biomarker. δPON指数作为头痛生物标志物。
IF 3.2 2区 生物学
Journal of thermal biology Pub Date : 2026-10-09 DOI: 10.1016/j.jtherbio.2026.104578
Álvarez-Prats David, Achalandabaso-Ochoa Alexander, Rodriguez-Almagro Daniel, Valera-Garrido Fermin, Naranjo-Cinto Fermin, Quintero-Pérez Jessica, Pecos-Martin Daniel, Carvajal-Fernández Oscar
{"title":"The δPON index as a headache biomarker.","authors":"Álvarez-Prats David, Achalandabaso-Ochoa Alexander, Rodriguez-Almagro Daniel, Valera-Garrido Fermin, Naranjo-Cinto Fermin, Quintero-Pérez Jessica, Pecos-Martin Daniel, Carvajal-Fernández Oscar","doi":"10.1016/j.jtherbio.2026.104578","DOIUrl":"https://doi.org/10.1016/j.jtherbio.2026.104578","url":null,"abstract":"","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"141 ","pages":"104578"},"PeriodicalIF":3.2,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149228250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The effects of ontogeny in variable temperature and flow waters on the locomotor physiology and morphology of Icelandic arctic charr (Salvelinus alpinus) 不同温度和水流条件下个体发育对冰岛北极鲑运动生理和形态的影响。
IF 3.2 2区 生物学
Journal of thermal biology Pub Date : 2026-10-01 Epub Date: 2026-10-08 DOI: 10.1016/j.jtherbio.2026.104585
Jay A. Nelson, Helgi Thor Thorarensen
{"title":"The effects of ontogeny in variable temperature and flow waters on the locomotor physiology and morphology of Icelandic arctic charr (Salvelinus alpinus)","authors":"Jay A. Nelson,&nbsp;Helgi Thor Thorarensen","doi":"10.1016/j.jtherbio.2026.104585","DOIUrl":"10.1016/j.jtherbio.2026.104585","url":null,"abstract":"<div><div>Climate change is causing increases in water temperature, flow and their variability in many freshwaters. Predicting fish futures will require knowing how they respond to variations in temperature and flow. This study tested the null hypothesis that locomotor physiology and morphology of Arctic charr are independent of the temperature and flow of water experienced during ontogeny. We raised cultured charr from hatch under a 2 X 2 matrix of flow (3 cm s<sup>−1</sup> &amp;15 cm s<sup>−1</sup>) and temperature (5°C and 13°C) in the laboratory. Fish were compared for sprinting performance (U<sub>sprint</sub>), swimming kinematics and performance during a constant acceleration swimming test (U<sub>cat</sub>) and oxygen consumption before and after the U<sub>cat</sub> test. We then captured wild charr from similar temperature environments in Iceland to compare with the laboratory fish. Fish performance in the U<sub>cat</sub> test was significantly better at 13°C than at 5°C with an apparent Q<sub>10</sub> of 1.3. The effect of rearing flow was noticeable in the metabolic support of swimming; fish reared under low flow at 5°C used more oxygen when swimming at low speed and were slower to recover metabolically from exhaustive swimming. Otherwise, oxygen consumption after exhaustive exercise was fairly uniform across treatments. Freshly-caught wild fish were better sprinters than laboratory fish at both temperatures, recovered faster from the U<sub>cat</sub> test at 13°C and were more thermally tolerant. Geometric morphometrics easily separated the shape of wild fish from cultured fish and flow, but not temperature, during ontogeny influenced morphology of cultured fish.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"141 ","pages":"Article 104585"},"PeriodicalIF":3.2,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149149864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Life history optimization and physiological constraints: Effects of temperature and oxygen on zebrafish growth differ as a function of cell size, sex and maturity 生活史优化和生理约束:温度和氧气对斑马鱼生长的影响随细胞大小、性别和成熟度的不同而不同。
IF 3.2 2区 生物学
Journal of thermal biology Pub Date : 2026-10-01 Epub Date: 2026-10-06 DOI: 10.1016/j.jtherbio.2026.104590
Iris L.E. van de Pol, Peter J.C. Kwant, J.G.J. Boerrigter, Wilco C.E.P. Verberk
{"title":"Life history optimization and physiological constraints: Effects of temperature and oxygen on zebrafish growth differ as a function of cell size, sex and maturity","authors":"Iris L.E. van de Pol,&nbsp;Peter J.C. Kwant,&nbsp;J.G.J. Boerrigter,&nbsp;Wilco C.E.P. Verberk","doi":"10.1016/j.jtherbio.2026.104590","DOIUrl":"10.1016/j.jtherbio.2026.104590","url":null,"abstract":"<div><div>Many ectothermic animals follow the temperature-size rule, whereby animals grow faster, but mature earlier at a smaller size in the warm. Here we investigate how temperature and oxygen affect growth in diploid and triploid zebrafish, the latter having larger cells. Cell size may modulate physiological constraints via effects on oxygen supply and demand. Small cells benefit from enhanced capacity for oxygen uptake and transport owing to a more favourable membrane surface-area-to-volume ratio, while large cells benefit from decreased costs related to ion pumping for maintaining electrochemical gradients over cell membranes. Life-history effects may arise because triploids are sterile; triploids may therefore allocate more energy towards growth. To test these ideas, we reared fish at different temperatures and oxygen conditions. In the cold, zebrafish grew slower but also took longer to mature, exhibiting greater size at maturity. Warmer temperatures generally reduced post-maturity growth, contrasting with the increase in growth observed before maturity. After maturation, we found differences between ploidy levels with triploid males having a better growth performance than diploid males, but only in the cold. As a result, thermal responses in asymptotic size were most pronounced in triploids. Hypoxia reduced post-maturity growth, especially in diploid females. Our results broadly matched expectations based on cell size. Maturation schedules seemed to govern size at maturity, while for asymptotic size, our results support a stronger role for physiological constraints, which appear more prevalent in triploids and in warm water.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"141 ","pages":"Article 104590"},"PeriodicalIF":3.2,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149181461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mechanistic insights into regulatory roles of long non-coding RNAs during ovarian development in heat-stressed Nile Tilapia (Oreochromis niloticus) 长链非编码rna在热胁迫尼罗罗非鱼卵巢发育中的调控作用机制研究
IF 3.2 2区 生物学
Journal of thermal biology Pub Date : 2026-10-01 Epub Date: 2026-10-08 DOI: 10.1016/j.jtherbio.2026.104584
Yi-Fan Tao, Wen Wang, Ji-Xiang Hua, Si-Qi Lu, Wen-Hao Zhang, Ya-Lun Dong, Jun Qiang
{"title":"Mechanistic insights into regulatory roles of long non-coding RNAs during ovarian development in heat-stressed Nile Tilapia (Oreochromis niloticus)","authors":"Yi-Fan Tao,&nbsp;Wen Wang,&nbsp;Ji-Xiang Hua,&nbsp;Si-Qi Lu,&nbsp;Wen-Hao Zhang,&nbsp;Ya-Lun Dong,&nbsp;Jun Qiang","doi":"10.1016/j.jtherbio.2026.104584","DOIUrl":"10.1016/j.jtherbio.2026.104584","url":null,"abstract":"<div><div>High temperatures adversely affect ovarian development in teleosts, manifested as elevated follicular atresia rates and reduced egg quality. However, the transcriptional and post-transcriptional regulatory mechanisms underlying heat stress-induced ovary syndrome in teleosts are poorly understood. In this study, RNA-Seq analyses were conducted to identify long non-coding RNAs (lncRNAs) and mRNAs showing differential expression in the ovary of reproductively active Nile tilapia (<em>Oreochromis niloticus</em>) between heat-stressed (34.5 ± 0.5 °C) and control (27.5 ± 0.5 °C) groups. By analyzing RNA-Seq data, we identified 681 differentially expressed (DE)-lncRNAs and 1764 DE-mRNAs after 12 days of heat exposure. Six randomly selected DE-lncRNAs and six DE-mRNAs were validated by RT-qPCR, including MSTRG.8300.1, <em>elovl5</em>, and others. The DE-lncRNAs were predicted to regulate 99 <em>cis</em> and 453 <em>trans</em> DE-mRNA targets. Pathway enrichment analyses indicated that these potential targets were involved in controlling the ovarian state and in the stimulus response, including the ErbB signaling pathway, endocytosis, apoptosis, and oocyte meiosis. A protein–protein interaction network analysis of DE-lncRNA predicted targets revealed six hub genes and four functional modules involved in ovarian responses to thermal stress. By combining the previously reported heat stress-responsive DE-miRNAs and the putative lncRNAs and mRNA targets predicted in this study, we constructed a predicted competing endogenous RNA (ceRNA) network that may be involved in the regulation of ovarian development under high temperatures. This predicted ceRNA network comprised 213 DE-mRNAs, 216 DE-lncRNAs, and 23 DE-miRNAs. Overall, our findings provide a foundational framework for elucidating heat stress-induced ovarian dysfunction in Nile tilapia via the lncRNA-associated regulatory network, but all predicted interactions in this study require further experimental functional validation.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"141 ","pages":"Article 104584"},"PeriodicalIF":3.2,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149154714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Behavioural thermoregulation modulates circadian clock gene expression in juvenile Atlantic salmon (Salmo salar) 行为体温调节调节幼年大西洋鲑鱼(Salmo salar)生物钟基因表达。
IF 3.2 2区 生物学
Journal of thermal biology Pub Date : 2026-10-01 Epub Date: 2026-09-25 DOI: 10.1016/j.jtherbio.2026.104577
María Alborja-Valado, Marcos López-Patiño, Frode Oppedal, Meredith Burke, Sonia Rey Planellas, Jesús M. Míguez, Mauro Chivite-Alcalde
{"title":"Behavioural thermoregulation modulates circadian clock gene expression in juvenile Atlantic salmon (Salmo salar)","authors":"María Alborja-Valado,&nbsp;Marcos López-Patiño,&nbsp;Frode Oppedal,&nbsp;Meredith Burke,&nbsp;Sonia Rey Planellas,&nbsp;Jesús M. Míguez,&nbsp;Mauro Chivite-Alcalde","doi":"10.1016/j.jtherbio.2026.104577","DOIUrl":"10.1016/j.jtherbio.2026.104577","url":null,"abstract":"<div><div>Environmental temperature is a key factor regulating physiological processes and circadian organization in ectothermic vertebrates. In fish, behavioural thermoregulation optimize physiological performance and may contribute to the synchronization of biological clocks, however, its effects on central and peripheral circadian oscillators remain poorly understood. In the present study, we investigated the daily rhythms of thermal preference and their influence on circadian organization in juvenile Atlantic salmon (<em>Salmo salar</em>). Fish were maintained either at a constant temperature or in a multi-chamber thermal gradient, allowing free thermal selection throughout a 24 h light-dark cycle. Daily thermal preference patterns were quantified through video analysis, while the expression of key clock genes were analysed in the brain, proximal intestine, and distal intestine using absolute quantitative PCR and cosinor analysis. Fish exposed to the thermal gradient displayed robust daily rhythms of thermal preference, together with significant circadian oscillations in clock gene expression across all tissues examined. However, the effects of thermal selection were tissue-specific. In both intestinal regions, thermal choice enhanced clock gene expression, whereas the brain exhibited more complex responses, including phase shifts and differential modulation among molecular clock components. These findings suggest a high degree of plasticity in the central circadian network in response to self-selected thermal environments. Overall, our results demonstrate that behavioural thermal selection is an important modulator of both central and peripheral circadian clocks in juvenile Atlantic salmon. This study highlights the pivotal role of temperature as a biological timing cue and advances our understanding of how thermoregulatory behaviour shapes circadian physiology in ectothermic vertebrates.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"141 ","pages":"Article 104577"},"PeriodicalIF":3.2,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149069788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ontogenetic consequences of developmental temperature in amphibians: simultaneous gains in heat tolerance and cumulative costs to stress physiology 两栖动物发育温度的个体发生后果:耐热性的同时增加和应激生理的累积成本。
IF 3.2 2区 生物学
Journal of thermal biology Pub Date : 2026-10-01 Epub Date: 2026-10-07 DOI: 10.1016/j.jtherbio.2026.104588
Ingrid R. Miguel, Pablo Burraco, Carlotta Hakemann, Lara Keunecke, Colette Martin, Natasha Kruger, Katharina Ruthsatz
{"title":"Ontogenetic consequences of developmental temperature in amphibians: simultaneous gains in heat tolerance and cumulative costs to stress physiology","authors":"Ingrid R. Miguel,&nbsp;Pablo Burraco,&nbsp;Carlotta Hakemann,&nbsp;Lara Keunecke,&nbsp;Colette Martin,&nbsp;Natasha Kruger,&nbsp;Katharina Ruthsatz","doi":"10.1016/j.jtherbio.2026.104588","DOIUrl":"10.1016/j.jtherbio.2026.104588","url":null,"abstract":"<div><div>Heat tolerance is critical for ectotherms facing environmental temperature variability, yet how it varies across life stages, and whether trade-offs occur between temperature-induced developmental plasticity and heat tolerance, remain unclear, particularly in organisms undergoing metamorphosis which represent 95% of all animal species. We examined how early-life thermal conditions shape growth, development, survival, acclimation capacity, heat tolerance, and energy allocation across ontogeny in the African clawed frog (<em>Xenopus laevis</em>), reared at six constant temperatures (17–32°C). We tested whether higher developmental temperatures generate trade-offs between accelerated growth and heat tolerance, and the consequences for post-metamorphic resilience to extreme heat. Rearing at 32°C was lethal before metamorphosis. At non-lethal warm temperatures (17–29°C), larvae and juveniles simultaneously accelerated development, maintained growth, and enhanced heat tolerance. However, juveniles reared at 29°C showed reduced survival, elevated corticosterone responses to acute stress, and diminished acclimation capacity, indicating increased energetic demands and constrained metabolic flexibility. These findings show that amphibians can integrate developmental plasticity with plastic adjustments in heat tolerance, but that such strategies incur cumulative physiological costs. By adopting an across-life-stage approach, our study highlights energy-allocation constraints that may limit population persistence under climate warming in species with complex life cycles.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"141 ","pages":"Article 104588"},"PeriodicalIF":3.2,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149166848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
From first to second: Does thermal stress shape reproductive investment decisions? 从头到尾:热应力会影响生殖投资决策吗?
IF 3.2 2区 生物学
Journal of thermal biology Pub Date : 2026-10-01 Epub Date: 2026-10-07 DOI: 10.1016/j.jtherbio.2026.104589
Jakob Wiil, Solène A. Morelle, Natalie Pilakouta
{"title":"From first to second: Does thermal stress shape reproductive investment decisions?","authors":"Jakob Wiil,&nbsp;Solène A. Morelle,&nbsp;Natalie Pilakouta","doi":"10.1016/j.jtherbio.2026.104589","DOIUrl":"10.1016/j.jtherbio.2026.104589","url":null,"abstract":"<div><div>Climate change is rapidly reshaping thermal environments with major consequences for animal fitness. Although the lethal effects of heat are well documented, sublethal thermal stress may influence reproductive investment, parental behaviour, and ultimately population persistence. Here, we tested whether elevated temperature alters parental investment decisions between current and future reproduction across successive breeding attempts in the burying beetle <em>Nicrophorus vespilloides</em>. Breeding pairs were maintained under control (20 °C) or warm (23 °C) conditions and monitored across two breeding bouts. We quantified parental behaviour (i.e., care duration and carcass preparation), somatic investment, reproductive output, and offspring fitness to determine whether warming modifies reproductive strategies. Elevated temperature did not interact with breeding bout to alter investment trajectories; instead, temperature and breeding bout exerted independent effects on reproductive strategies. Across thermal treatments, parents invested more in reproduction during the second bout, producing larger and heavier broods while gaining less mass themselves, consistent with increased reproductive allocation. Warming reduced reproductive success and offspring fitness, lowering brood size, brood mass, offspring survival, and female mass gain, but it did not affect parental care. These results indicate that chronic warming constrains reproductive efficiency without altering parental investment strategies, highlighting the need to distinguish intrinsic life-history dynamics from environmental constraints when forecasting animal responses to climate warming.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"141 ","pages":"Article 104589"},"PeriodicalIF":3.2,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149167364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Skin thermal damage as an independent pathophysiological entity: Molecular mechanisms distinct from photoaging and implications for systemic conditioning strategies 皮肤热损伤作为一个独立的病理生理实体:不同于光老化的分子机制及其对全身调节策略的影响。
IF 3.2 2区 生物学
Journal of thermal biology Pub Date : 2026-10-01 Epub Date: 2026-09-25 DOI: 10.1016/j.jtherbio.2026.104579
Huiting Yang, Yuanbai Li, Hong Meng, Meng Li, Yu Du, Yihao Li, Weibo Zhao, Jing Ma, Tao Liu, Yang Yang, Yujing Shi, Fangzhou Liu
{"title":"Skin thermal damage as an independent pathophysiological entity: Molecular mechanisms distinct from photoaging and implications for systemic conditioning strategies","authors":"Huiting Yang,&nbsp;Yuanbai Li,&nbsp;Hong Meng,&nbsp;Meng Li,&nbsp;Yu Du,&nbsp;Yihao Li,&nbsp;Weibo Zhao,&nbsp;Jing Ma,&nbsp;Tao Liu,&nbsp;Yang Yang,&nbsp;Yujing Shi,&nbsp;Fangzhou Liu","doi":"10.1016/j.jtherbio.2026.104579","DOIUrl":"10.1016/j.jtherbio.2026.104579","url":null,"abstract":"<div><h3>Background</h3><div>While photochemical damage mechanisms have been extensively characterized, thermal damage from infrared (IR) radiation and environmental heat persists as an underappreciated pathophysiological entity. Current photoprotection standards focus exclusively on ultraviolet (UV) blocking, leaving skin vulnerable to thermally-induced aging and systemic deterioration.</div></div><div><h3>Objective</h3><div>To systematically delineate skin thermal damage as distinct from photoaging through comparative molecular energetics analysis, propose an operational scientific definition, and elucidate the paradigm shift from \"photon blocking\" to \"systemic conditioning\" for effective thermal protection.</div></div><div><h3>Methods</h3><div>Comprehensive literature synthesis (2022-2025) focusing on epigenetic aging studies, TRPV1 thermosensory mechanisms, heat shock protein dynamics, and multi-targeted pharmacological interventions.</div></div><div><h3>Results</h3><div>Thermal damage operates through physical energy accumulation (molecular vibrational excitation) rather than photochemical bond cleavage, with TRPV1/Ca<sup>2+</sup>/HSF1 signaling constituting a pathway independent of UV-induced DNA damage. Recent evidence demonstrates that chronic heat exposure accelerates epigenetic aging by 14 months—equivalent to smoking effects (Choi 2025)—through DNAmAge acceleration. Notably, IR effects exhibit dose-dependent biphasicity: low-dose photobiomodulation (&lt;10 J/cm<sup>2</sup>) confers beneficial preconditioning via mild HSP induction, whereas high-dose thermal accumulation (&gt;42°C tissue temperature) triggers destructive protein denaturation and MMP-1 upregulation.</div></div><div><h3>Conclusions</h3><div>Skin thermal damage represents a \"physical dissolution\" process characterized by cumulative internal structural disruption, necessitating protection strategies fundamentally different from UV blocking. Traditional Chinese Medicine offers unique advantages through multi-targeted \"conditioning\" of cellular resilience mechanisms, aligning with the holistic requirements of thermal protection.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"141 ","pages":"Article 104579"},"PeriodicalIF":3.2,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149149870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rapid cold hardening improves tissue viability and facilitates recovery of activity following nonlethal cold exposure in Drosophila melanogaster 快速冷硬化提高组织活力和促进恢复活动后,非致死性冷暴露在果蝇黑腹。
IF 3.2 2区 生物学
Journal of thermal biology Pub Date : 2026-10-01 Epub Date: 2026-09-25 DOI: 10.1016/j.jtherbio.2026.104580
Laura N. Unfried, Nicholas M. Teets
{"title":"Rapid cold hardening improves tissue viability and facilitates recovery of activity following nonlethal cold exposure in Drosophila melanogaster","authors":"Laura N. Unfried,&nbsp;Nicholas M. Teets","doi":"10.1016/j.jtherbio.2026.104580","DOIUrl":"10.1016/j.jtherbio.2026.104580","url":null,"abstract":"<div><div>Low temperature is a significant stressor for small-bodied ectotherms like insects, and they employ a range of physiological mechanisms to mitigate damage caused by cold exposure. Rapid cold hardening (RCH) is a short-term acclimation response in which brief chilling (minutes to hours) dramatically improves tolerance to otherwise lethal temperatures. The ability of RCH to prevent lethality from low temperature exposure is well-studied and has been documented in many arthropod taxa. RCH can also protect against injuries incurred at nonlethal temperatures, but studies on the ability of RCH to protect against sublethal cold injury are limited, despite nonlethal cold exposure being more common in nature. Here, we test the hypothesis that RCH protects against sublethal cold injury in the model species <em>Drosophila melanogaster.</em> Specifically, we exposed flies to a nonlethal cold shock with and without an RCH pretreatment, and we assessed tissue viability, metabolic rate, macronutrient content, locomotor behavior, and reproduction after cold exposure. Relative to flies directly exposed to cold shock, flies pretreated with RCH had higher cell viability 24 h after treatment in both midgut and ovarian tissue. RCH also had longer-term organismal benefits; productivity in RCH females was higher than in non-hardened females for the first two days following treatment, and flies treated with RCH had higher activity 4-7 days after cold treatment, particularly in males. However, RCH did not preserve reproductive output in males or improve metabolic rate, macronutrient content, or short-term recovery rate from chill coma relative to flies exposed to nonlethal cold shock. Nonetheless, our results indicate that RCH does protect against specific types of sublethal cold injury, which further supports the ecological benefits of this trait.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"141 ","pages":"Article 104580"},"PeriodicalIF":3.2,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149111490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermoregulatory and cognitive responses to ambient temperature under resting and exercise conditions 在休息和运动条件下对环境温度的体温调节和认知反应。
IF 3.2 2区 生物学
Journal of thermal biology Pub Date : 2026-10-01 Epub Date: 2026-10-08 DOI: 10.1016/j.jtherbio.2026.104583
He Liu, Yuhao Chen, Ahmad Munir Che Muhamed, Xinyan Zheng
{"title":"Thermoregulatory and cognitive responses to ambient temperature under resting and exercise conditions","authors":"He Liu,&nbsp;Yuhao Chen,&nbsp;Ahmad Munir Che Muhamed,&nbsp;Xinyan Zheng","doi":"10.1016/j.jtherbio.2026.104583","DOIUrl":"10.1016/j.jtherbio.2026.104583","url":null,"abstract":"<div><div>Ambient temperature is associated with human thermoregulation and may relate to cognitive performance, but the effects of mild cold and moderate heat, which are more representative of daily environments, remain insufficiently understood. This study examined the thermoregulatory, perceptual, and cognitive responses during passive rest and moderate-intensity exercise. Forty-eight participants were randomly assigned to cold (10°C), moderate (22°C), or hot (32°C) conditions and completed separate resting and exercise sessions at their assigned temperature. Core temperature (Tcore), mean skin temperature (Tsk), thermal comfort (TC), and cognitive performance were assessed before and after a 1-h intervention using the Attention Network Test (ANT) and Stop-Signal Task (SST) under controlled relative humidity. Under resting conditions, Tsk decreased in the cold group without a corresponding change in Tcore, whereas both Tsk and Tcore increased in the hot group. TC was lower in the cold and hot groups than in the moderate-temperature group during the rest session. No significant ambient temperature × time interactions were detected for the ANT or SST outcomes, although significant main effects of time were observed for selected measures. Exploratory post-hoc comparisons showed cold-related reductions in accuracy under specific cue conditions, and heat-related declines in stop-accuracy with increased stop-signal reaction time/stop-accuracy, while stop-signal delays shortened in both cold and hot groups after sitting. These findings suggest a potential link between thermal exposure and cognitive changes at rest. During exercise, thermoregulatory and perceptual responses remained evident, but no significant temperature × time interactions were observed for cognitive outcomes. Reaction times and accuracy on both tasks were largely preserved across conditions. The pattern of cognitive responses to temperature differed at rest and during exercise. Overall, mild cold and moderate heat produced clear thermoregulatory and perceptual responses, whereas cognitive responses were varied across tasks and conditions.</div></div>","PeriodicalId":17428,"journal":{"name":"Journal of thermal biology","volume":"141 ","pages":"Article 104583"},"PeriodicalIF":3.2,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149170375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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