Mechanisms of temperature modulation in mammalian seasonal timing
| Autor: | Renzo T M Roodenrijs, Roelof A. Hut, Laura van Rosmalen, Jayme van Dalum, Daniel Appenroth, Lauren de Wit, David G. Hazlerigg |
|---|---|
| Přispěvatelé: | Hut lab, Van de Zande lab |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0301 basic medicine
Male endocrine system Bioenergetics Photoperiod Deiodinase Zoology Biochemistry Iodide Peroxidase Mammalian reproduction 03 medical and health sciences 0302 clinical medicine Genetics Seasonal breeder Animals Microtus Gonads Molecular Biology Melatonin photoperiodism biology Arvicolinae Reproduction Temperature biology.organism_classification Phenotype Circadian Rhythm 030104 developmental biology biology.protein Female Pars tuberalis Seasons Energy Metabolism 030217 neurology & neurosurgery hormones hormone substitutes and hormone antagonists Biotechnology |
| Zdroj: | The FASEB Journal, 35(5):e21605. FEDERATION AMER SOC EXP BIOL |
| ISSN: | 0892-6638 |
| Popis: | Global warming is predicted to have major effects on the annual time windows during which species may successfully reproduce. At the organismal level, climatic shifts engage with the control mechanism for reproductive seasonality. In mammals, laboratory studies on neuroendocrine mechanism emphasize photoperiod as a predictive cue, but this is based on a restricted group of species. In contrast, field-oriented comparative analyses demonstrate that proximate bioenergetic effects on the reproductive axis are a major determinant of seasonal reproductive timing. The interaction between proximate energetic and predictive photoperiodic cues is neglected. Here, we focused on photoperiodic modulation of postnatal reproductive development in common voles (Microtus arvalis), a herbivorous species in which a plastic timing of breeding is well documented. We demonstrate that temperature-dependent modulation of photoperiodic responses manifest in the thyrotrophin-sensitive tanycytes of the mediobasal hypothalamus. Here, the photoperiod-dependent expression of type 2 deiodinase expression, associated with the summer phenotype was enhanced by 21°C, whereas the photoperiod-dependent expression of type 3 deiodinase expression, associated with the winter phenotype, was enhanced by 10°C in spring voles. Increased levels of testosterone were found at 21°C, whereas somatic and gonadal growth were oppositely affected by temperature. The magnitude of these temperature effects was similar in voles photoperiodical programmed for accelerated maturation (ie, born early in the breeding season) and in voles photoperiodical programmed for delayed maturation (ie, born late in the breeding season). The melatonin-sensitive pars tuberalis was relatively insensitive to temperature. These data define a mechanistic hierarchy for the integration of predictive temporal cues and proximate thermo-energetic effects in mammalian reproduction. |
| Databáze: | OpenAIRE |
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