Maternal nicotine exposure impairs brown adipose tissue via AMPK-SIRT1-PGC-1α signals in male offspring. 2021

Gai-Ling Li, and Jie Ping, and Hui-Jian Chen, and Wan-Xia Zhang, and Jie Fan, and Dang-Sheng Peng, and Li Zhang, and You-E Yan
Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China.

OBJECTIVE Maternal nicotine exposure during pregnancy and lactation is associated with obesity in offspring. Brown adipose tissue (BAT) is correlated with energy metabolism and obesity. In this study, we explored the mechanism of maternal nicotine exposure on BAT changes in male offspring. METHODS Pregnant rats were randomly assigned to nicotine (1.0 mg/kg twice per day, subcutaneous administration) or control groups. In vitro, C3H10T1/2 cells were induced to differentiate into mature brown adipocytes, and 0-50 μM nicotine was given to C3H10T1/2 cells during the differentiation process. RESULTS Nicotine-exposed males had white-like adipocytes and abnormal mitochondria structure in iBAT at 26 weeks. The expression of mitochondrial genes, UCP1 and AMPK-SIRT1-PGC-1α pathway were downregulated in the nicotine group at 26 weeks rather than 4 weeks. In vitro, 50 μM nicotine decreased the expression of mitochondrial genes, UCP1 and AMPK-SIRT1-PGC-1α pathway in brown adipocytes. CONCLUSIONS Maternal nicotine exposure showed the "programming" effect on the decreased brown-like phenotype in BAT of adult male offspring via downregulating AMPK-SIRT1-PGC-1α pathway. This impairment of BAT may be a potential mechanism of nicotine-induced obesity in male offspring.

UI MeSH Term Description Entries
D008297 Male Males
D009538 Nicotine Nicotine is highly toxic alkaloid. It is the prototypical agonist at nicotinic cholinergic receptors where it dramatically stimulates neurons and ultimately blocks synaptic transmission. Nicotine is also important medically because of its presence in tobacco smoke. Nicotine Bitartrate,Nicotine Tartrate
D011247 Pregnancy The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH. Gestation,Pregnancies
D011297 Prenatal Exposure Delayed Effects The consequences of exposing the FETUS in utero to certain factors, such as NUTRITION PHYSIOLOGICAL PHENOMENA; PHYSIOLOGICAL STRESS; DRUGS; RADIATION; and other physical or chemical factors. These consequences are observed later in the offspring after BIRTH. Delayed Effects, Prenatal Exposure,Late Effects, Prenatal Exposure
D002001 Adipose Tissue, Brown A thermogenic form of adipose tissue composed of BROWN ADIPOCYTES. It is found in newborns of many species including humans, and in hibernating mammals. Brown fat is richly vascularized, innervated, and densely packed with MITOCHONDRIA which can generate heat directly from the stored lipids. Brown Fat,Hibernating Gland,Brown Adipose Tissue,Fat, Brown,Tissue, Brown Adipose
D005260 Female Females
D005786 Gene Expression Regulation Any of the processes by which nuclear, cytoplasmic, or intercellular factors influence the differential control (induction or repression) of gene action at the level of transcription or translation. Gene Action Regulation,Regulation of Gene Expression,Expression Regulation, Gene,Regulation, Gene Action,Regulation, Gene Expression
D000071248 Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha A transcriptional co-activator for NUCLEAR RECEPTORS. It is characterized by an N-terminal LxxLL sequence, a region that interacts with PPAR GAMMA, and a C-terminal RNA RECOGNITION MOTIF. It increases expression of MITOCHONDRIAL UNCOUPLING PROTEIN to regulate genes involved in metabolic reprogramming in response to dietary restriction and the integration of CIRCADIAN RHYTHMS with ENERGY METABOLISM. PGC-1-alpha Protein,PPARGC-1-alpha Protein,PPARGC1a Protein,PGC 1 alpha Protein,PPARGC 1 alpha Protein,Peroxisome Proliferator Activated Receptor Gamma Coactivator 1 alpha
D000071256 Uncoupling Protein 1 A mitochondrial uncoupling protein that is expressed in BROWN ADIPOSE TISSUE. It is critical for NONSHIVERING THERMOGENESIS to prevent heat loss in NEONATES. BAT Uncoupling Protein,Brown Adipose Tissue Uncoupling Protein,Mitochondrial Brown Fat Uncoupling Protein 1,Mitochondrial Uncoupling Protein,SLC25A7 Protein,Solute Carrier Family 25 Member 7,Thermogenin,UCP1 Protein,Uncoupling Protein 1a,Uncoupling Protein, Mitochondrial Membrane,Uncoupling Protein, BAT,Uncoupling Protein, Mitochondrial
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia

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