当前位置： SCI文献检索 > Brain Structure & Function期刊下所有文献 > Early-life sleep deprivation persistently depresses melatonin production and bio-energetics of the pineal gland: potential implications for the development of metabolic deficiency.

Early-life sleep deprivation persistently depresses melatonin production and bio-energetics of the pineal gland: potential implications for the development of metabolic deficiency.

Abstract：

:Early-life sleep deprivation (ESD) is a serious condition with severe metabolic sequelae. The pineal hormone melatonin plays an important role in homeostatic regulation of metabolic function. Considering norepinephrine-mediated Ca(2+) influx and subsequent protein kinase A (PKA) activation is responsible for downstream cAMP-response element-binding protein (CREB) phosphorylation and melatonin biosynthesis, the present study determined whether Ca(2+) expression, together with the molecular machinery participated in melatonin production would significantly alter after ESD. Weaning rats subjected to chronic ESD and maintained naturally (light:dark cycle = 12:12) to adulthood were processed for time-of-flight secondary ion mass spectrometry, immunoblotting, immunohistochemistry together with spectrometric assay to detect the Ca(2+) signaling, adrenoreceptors, PKA, phosphorylated CREB (pCREB) as well as the serum level of melatonin, respectively. Pineal bio-energetics and metabolic function were determined by measuring the cytochrome oxidase activity and serum level of glucose, triglyceride, insulin, high- and low-density lipoproteins, respectively. Results indicated that in normal rats, strong Ca(2+) signaling along with intense adrenoreceptors, PKA, and pCREB activities were all detected in pinealocytes. Enhanced Ca(2+) imaging and signaling pathway corresponded well with intact bio-energetics, normal melatonin production and metabolic activity. However, following ESD, not only Ca(2+) but also pineal signaling activities were all significantly decreased. Blood analysis showed reduced melatonin level and impaired metabolic function after ESD. As depressed Ca(2+)-mediated signaling pathway and melatonin biosynthesis are positively correlated with the development of metabolic dysfunction, supplementary use of melatonin in childhood may thus serve as a practical way to prevent or counteract the ESD-induced metabolic deficiency.

journal_name

Brain Struct Funct

journal_title

Brain structure & function

authors

Chen LY,Tiong C,Tsai CH,Liao WC,Yang SF,Youn SC,Mai FD,Chang HM

doi

10.1007/s00429-014-0716-x

subject

Has Abstract

pub_date

2015-03-01 00:00:00

pages

663-76

issue

eissn

1863-2653

issn

1863-2661

journal_volume

220

pub_type

杂志文章

在线工具

Early-life sleep deprivation persistently depresses melatonin production and bio-energetics of the pineal gland: potential implications for the development of metabolic deficiency.