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Sex differences in circadian timing systems: implications for disease.
1Department of Psychology, Columbia University, United States.
Frontiers in Neuroendocrinology
|November 30, 2013
Summary
Biological sex influences circadian rhythms, impacting hormone regulation and sleep. Understanding these sex differences in biological clocks is crucial for developing targeted disease treatments.
Area of Science:
- Chronobiology
- Endocrinology
- Neuroscience
- Sex Differences Research
Background:
- Eukaryotic cells possess endogenous circadian clocks synchronized by internal and external cues.
- Biological sex is a fundamental characteristic of virtually all eukaryotic cells.
- The suprachiasmatic nucleus (SCN) acts as the master circadian clock in mammals.
Purpose of the Study:
- To review the intricate relationship between circadian clocks and biological sex differences.
- To explore sex-specific variations in key physiological systems regulated by circadian rhythms.
- To highlight how circadian rhythm disruption differs between sexes and its association with disease.
Main Methods:
- Literature review focusing on circadian timing systems and sex differences.
- Analysis of sex-specific variations in the hypothalamic-pituitary-gonadal (HPG) axis.
- Examination of sex differences in the hypothalamic-adrenal-pituitary (HPA) axis and sleep-arousal systems.
Main Results:
- Gonadal steroid receptors are expressed widely, interacting with SCN inputs.
- Significant sex differences exist in the circadian timing of the HPG and HPA axes.
- Disruptions in circadian rhythms manifest differently across sexes, correlating with various dysfunctions and diseases.
Conclusions:
- Circadian timing systems exhibit significant sex differentiation.
- Understanding these sex-specific circadian mechanisms is vital for personalized medicine.
- Tailored therapeutic strategies targeting circadian rhythm disruptions can improve disease outcomes.
Keywords:
17β-estradiol5-FU5-HT5-fluorouracilACTHAMYANSAPARARCAVPAVPVBMAL1BNSTC-FOSCRHCircadianDDDHTDMHDRDSPSDelayed Sleep Phase SyndromeE(2)EEGEPERERαFASPSFamilial Advanced Sleep Phase SyndromeGCGDXGHTGRGRPGnIHGnRHHAHBHPAHPGHormonesIGLIMLKOKiss1Kiss1 RKiss1 receptorLCLDLHLHALSMRMUAMnPONANeuronal PAS domain-containing protein 2Npas2OVXPPER1PER2POAPVAPVNPer1Per2Period1 gene or mRNAPeriod1 proteinPeriod2 gene or mRNAPeriod2 proteinRHTRchReproductionSCNSDSex differencesSleepStressSuprachiasmatic nucleusTTHTMNVIPVLPOVMHVNTRWTaction potentialadrenocorticotropic hormoneamygdalaandrogen receptorsanterior paraventricular thalamic nucleianterolateral paraventricular nucleusarcuate nucleusarginine vasopressinautonomic nervous systembed nucleus of the stria terminalisbrain and muscle ARNT-like protein1c-fosconstant darknesscorticotropin releasing hormonedenoting the gene or mRNAdenoting the proteindihydrotestosteronedorsal raphedorsomedial hypothalamuselectroencephalographyestradiol plus progesteroneestrogen receptor alphaestrogen receptorsgastrin-releasing peptidegeniculo-hypothalamic tractglucocortocoid receptorglucocortocoidsgonadectomygonadotropin inhibiting hormonegonadotropin releasing hormonehabenulahistaminehypothalamic–adrenalhypothalamic–pituitary–gonadalintergeniculate leafletintermediolateral columnkisspeptinknock outlateral hypothalamic arealateral septumlight-darklocus coeruleusluteinizing hormonemPOAmedial parvocellular PVNmedial preoptic areamedial raphemedian preoptic areampPVNmulti-unit neural activitynorandrenergicovariectomizedparaventricular nucleus of the hypothalamuspreoptic areaprogesteroneretinohypothalamic tractretrochiasmatic areasPVZserotonergicsleep deprivationsub paraventricular zone SWA, slow wave activitysuprachiasmatic nucleitestosteronetuberomammillary nucleustyrosine hydroxylasevariable nucleotide tandem repeatvasoactive intestinal polypeptideventrolateral preoptic areaventromedial nucleus of the hypothalamuswild typeRelated Concept Videos
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