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Photoperiodic modulation of melatonin receptor and immune genes in migratory redheaded bunting
Comp Biochem Physiol A Mol Integr Physiol. 2023 Jan 29:111381. doi: 10.1016/j.cbpa.2023.111381. Online ahead of print.ABSTRACTThe transcriptional regulation of innate immune function across annual life history states (LHS) remains obscure in avian migrants. We, therefore, investigated this in a migratory passerine songbird, redheaded bunting (Emberiza bruniceps), which exhibits long-distance vernal migration from India to Central Asia. We exposed the birds (N = 10) to differential photoperiodic conditions to induce a non-migratory (NM), pre-migratory (PM), migratory (MIG), and refractory (REF) state, and performed gene exp...
Source: Comparative Biochemistry and Physiology. Part A, Molecular and integrative physiology. - February 1, 2023 Category: Physiology Authors: Jyoti Tiwari Sayantan Sur Asma Naseem Sangeeta Rani Shalie Malik Source Type: research

Role of BMAL1 and CLOCK in regulating the secretion of melatonin in chick retina under monochromatic green light.
Abstract As the circadian pacemaker of birds, the retina possesses the ability to receive light information, generate circadian oscillation, and secrete melatonin. Previous studies have confirmed that monochromatic green light can accelerate the circadian rhythmic expression of clock genes in the chick retina, thereby increasing cAanat mRNA level and melatonin secretion. However, as the core components of the transcriptional-translational negative feedback loop, the role that cBmal1 and cClock plays in the regulation of the retinal molecular clock system and melatonin secretion under monochromatic green light is u...
Source: Chronobiology International - October 28, 2020 Category: Biology Authors: Bian J, Wang Z, Dong Y, Cao J, Chen Y Tags: Chronobiol Int Source Type: research