98%
921
2 minutes
20
Per3 is one of the primary components of circadian clock system. While circadian dysregulation is known to be involved in the pathogenesis of several neuropsychiatric diseases. It remains largely unknown whether they participate in embryonic brain development. Here, we examined the role of clock gene Per3 in the development of mouse cerebral cortex. In situ hybridization analysis revealed that Per3 is expressed in the developing mouse cortex. Acute knockdown of Per3 with in utero electroporation caused abnormal positioning of cortical neurons, which was rescued by RNAi-resistant Per3. Per3-deficient cells showed abnormal migration phenotypes, impaired axon extension and dendritic arbor formation. Taken together, Per3 was found to play a pivotal role in corticogenesis via regulation of excitatory neuron migration and synaptic network formation.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6458147 | PMC |
http://dx.doi.org/10.1038/s41598-019-42390-9 | DOI Listing |
Nat Commun
September 2025
Centre for Genomics and Oncological Research (GENYO), Avenue de la Ilustración 114, 18016, Granada, Spain.
Circadian oscillations of gene transcripts rely on a negative feedback loop executed by the activating BMAL1-CLOCK heterodimer and its negative regulators PER and CRY. Although circadian rhythms and CLOCK protein are mostly absent during embryogenesis, the lack of BMAL1 during prenatal development causes an early aging phenotype during adulthood, suggesting that BMAL1 performs an unknown non-circadian function during organism development that is fundamental for healthy adult life. Here, we show that BMAL1 interacts with TRIM28 and facilitates H3K9me3-mediated repression of transposable elements in naïve pluripotent cells, and that the loss of BMAL1 function induces a widespread transcriptional activation of MERVL elements, 3D genome reorganization and the acquisition of totipotency-associated molecular and cellular features.
View Article and Find Full Text PDFAnn Am Thorac Soc
September 2025
University of Florida, Department of Medicine, Gainesville, Florida, United States;
Background: Pulmonary hypertension (PH) is a systemic illness with increasingly subtle disease manifestations including sleep disruption. Patients with PH are at increased risk for disturbances in circadian biology, although to date there is no data on "morningness" or "eveningness" in pulmonary vascular disease.
Research Questions: Our group studied circadian rhythms in PH patients based upon chronotype analysis, to explore whether there is a link between circadian parameters and physiologic risk-stratifying factors to inform novel treatment strategies in patients with PH?
Study Design And Methods: We serially recruited participants from July 2022 to March 2024, administering in clinic the Munich Chronotype Questionnaire (MCTQ).
Proc Natl Acad Sci U S A
September 2025
Department of Biology, Duke University, Durham, NC 27708.
Organisms use circadian clocks to synchronize physiological processes to anticipate the Earth's day-night cycles and regulate responses to environmental signals to gain competitive advantage. While divergent genetic clocks have been studied extensively in bacteria, fungi, plants, and animals, an ancient conserved circadian redox rhythm has been recently reported. However, its biological function and physiological outputs remain elusive.
View Article and Find Full Text PDFInt J Soc Psychiatry
September 2025
Department of Community Medicine, All India Institute of Medical Sciences, Nagpur, MH, India.
Introduction: Night Eating Syndrome (NES) is a distinct psychopathological entity variously considered as a mental health disorder, eating disorder or circadian rhythm disorder. Medical students are faced with hectic schedules, sleep interruptions and high-stakes exams as they become healthcare providers. Such social factors coupled with poor dietary practices may impact their mental health and biological clocks, leading to NES amongst this population.
View Article and Find Full Text PDFZygote
September 2025
International School of Medicine, Istanbul Medipol University, Istanbul, Turkey.
Circadian rhythms are intrinsic, endogenously generated cycles that regulate various physiological processes, including reproductive functions. These rhythms are orchestrated by a network of core clock genes and are influenced by external environmental cues, primarily the light-dark cycle. Disruptions in circadian rhythms can have profound effects on fertility in both males and females, impacting processes such as the estrous cycle, ovulation, sperm production, implantation and pregnancy maintenance.
View Article and Find Full Text PDF