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Melanocortin su

Eun Jin Kwon, Hye Ah Lee, Young-Ah You, Hyesook Park, Su Jin Cho, Eun Hee Ha, Young Ju Kim
The association of preterm birth with obesity and metabolic syndrome later in life is well established. Although the biological mechanism for this association is poorly understood, epigenetic alterations of metabolic-related genes in early life may have important roles in metabolic dysfunction. Thus, we investigated the associations of DNA methylations of melanocortin 4 receptor (MC4R) and hepatocyte nuclear factor 4 alpha (HNF4α) with metabolic profiles in cord blood of term and preterm infants.We measured metabolic profiles in cord blood samples of 85 term and 85 preterm infants...
August 2016: Medicine (Baltimore)
Hsiu-Mei Chiang, Yin-Chih Chien, Chieh-Hsi Wu, Yueh-Hsiung Kuo, Wan-Chen Wu, Yu-Yun Pan, Yu-Han Su, Kuo-Ching Wen
We investigated the effects of an aqueous alcohol extract of Rhodiola rosea (R. rosea) and its hydrolysate on melanin synthesis and the mechanisms mediating the activity. The ratio of tyrosol to salidroside was 2.3 in hydroalcoholic extract, and 51.0 in hydrolysate. We found that R. rosea extract and its hydrolysate inhibited melanin synthesis and tyrosinase activity in mouse melanoma cells (B16F0 cells). R. rosea extract also inhibited gene and protein expression of melanocortin 1 receptor (MC1R) and inhibited c-AMP response element binding protein (CREB) phosphorylation, suppressed the activation of AKT and glycogen synthase kinase-3 beta (GSK3β), and inhibited the expression of microphthalmia-associated transcription factor (MITF) and tyrosinase-related protein 1 (TRP-1)...
March 2014: Food and Chemical Toxicology
Guang-Li Yang, Dong-Li Fu, Xia Lang, Yu-Tao Wang, Shu-Ru Cheng, Su-Li Fang, Yu-Zhu Luo
The melanocortin receptor 1 (MC1R) plays a central role in regulation of animal coat color formation. In this study, we sequenced the complete coding region and parts of the 5'- and 3'-untranslated regions of the MC1R gene in Chinese sheep with completely white (Large-tailed Han sheep), black (Minxian Black-fur sheep), and brown coat colors (Kazakh Fat-Rumped sheep). The results showed five single nucleotide polymorphisms (SNPs): two non-synonymous mutations previously associated with coat color (c.218 T>A, p...
2013: TheScientificWorldJournal
Su-Mei Zhao, Wei-Zhen Li, Hong-Bin Pan, Ying Huang, Ming-Hua Yang, Hong-Jiang Wei, Shi-Zheng Gao
Intramuscular fat (IMF) content plays an important role in meat quality. Many genes involved in lipid and energy metabolism were identified as candidate genes for IMF deposition, since genetic polymorphisms within these genes were associated with IMF content. However, there is less information on the expression levels of these genes in the muscle tissue. This study aimed at investigating the expression levels of sterol regulating element binding protein-1c (SREBP-1c), diacylglycerol acyltransferase (DGAT-1), heart-fatty acids binding protein (H-FABP), leptin receptor (LEPR) and melanocortin 4 receptor (MC4R) genes and proteins in two divergent Banna mini-pig inbred lines (BMIL)...
December 2012: Genetics and Molecular Biology
Shu-Fang Su, Ai-Min Yang, Shao-Bin Yang, Ning-Bo Wang, Song-Song Lu, Hui-Hui Wang, Qiang Chen
Neuronostatin is a 13-amino acid amidated peptide widely distributed in various organs including gastrointestinal tract. However, the effect of neuronostatin on gastrointestinal motility has not been well characterized. In the present work, effects of central administration of neuronostatin on gastric emptying and gastrointestinal transit were investigated. The results indicated that intracerebroventricular (i.c.v.) administration of neuronostatin (1, 5, 10 or 20nmol/mouse) delayed gastric emptying and gastrointestinal transit in a dose-related manner in mice...
May 2012: Peptides
Shao-Bin Yang, Ai-Min Yang, Shu-Fang Su, Hui-Hui Wang, Ning-Bo Wang, Qiang Chen
Neuronostatin, a newly identified peptide encoded by the somatostatin (SST) gene, was proved to produce significant antinociceptive effect in mouse tail immersion test. However, the effect of neuronostatin on tonic pain was still not clear. The aim of this study was to investigate the effect of neuronostatin in the formalin test and its possible mechanism. We found that intracerebroventricular (i.c.v.) administration of neuronostatin (1, 3, 6, 12nmol/mouse) increased licking in a dose-related manner during the late phase, but did not affect the early phase of formalin test in mice...
January 6, 2012: Neuroscience Letters
Ai-min Yang, Yue-ke Ji, Shu-fang Su, Shao-bin Yang, Song-song Lu, Ze-yun Mi, Qing-zhen Yang, Qiang Chen
Neuronostatin is a recently discovered endogenous bioactive peptide that is encoded by pro-mRNA of somatostatin. In the present study, we investigated the effect of neuronostatin on mood regulation in the forced swim test of mice. Our results showed intracerebroventricular (i.c.v.) administration of neuronostatin produced an increase in the immobility time, suggesting that neuronostatin induced depression-like effect. In order to rule out the possibility that neuronostatin had increased immobility time by a non-specific reduction in general activity, the effect of neuronostatin on locomotor activity was examined...
September 2011: Peptides
Ai-min Yang, Wan-wen Ge, Song-song Lu, Shao-bin Yang, Shu-fang Su, Ze-yun Mi, Qiang Chen
Neuronostatin, a recently discovered endogenous bioactive peptide, was encoded by pro-mRNA of somatostatin that contributes to modulation of nociception. However, nociceptive effect of neuronostatin is still not fully known. The aim of this study was to evaluate effect of neuronostatin on nociception and elucidate its possible mechanism of action. Intracerebroventricular (i.c.v.) administration of neuronostatin (0.3, 3, 6, 12nmol/mouse) produced a dose- and time-related antinociceptive effect in the tail immersion assay in mice, an acute pain model...
September 2011: Peptides
Timothy Weeden, Jim Stefano, Su Duan, Andrea Edling, Lihui Hou, Wei-Lien Chuang, Michael A Perricone, Clark Pan, John L Dzuris
α-melanocyte stimulating hormone (α-MSH) is a tridecapeptide fragment of pro-opiomelanocortin (POMC) with broad effects on appetite, skin pigmentation, hormonal regulation, and potential roles in both inflammation and autoimmunity. The use of this peptide as an anti-inflammatory agent is limited by its low selectivity between the melanocortin receptors, susceptibility to proteolytic degradation, and rapid clearance from circulation. A retro-inverso (RI) sequence of α-MSH was characterized for receptor activity and resistance to protease...
January 2011: Journal of Peptide Science: An Official Publication of the European Peptide Society
Guihong Yang, Juan Su, Yuan Yao, Zhihai Lei, Guorui Zhang, Xun Li
Neuromedin S (NMS) has been implicated in the regulation of luteinizing hormone (LH) secretion. However, the regulatory mechanism of NMS on LH in pigs remains unexplored. In the present study, we confirmed the hypothesis that the effect of NMS on LH could be mediated via hypothalamic melanocyte-stimulating hormones (MSH) neurons of ovariectomized pigs. In an immunohistological experiment, NMS receptor NMU2R-positive neurons were found in the paraventricular nucleus of hypothalamus, widely distributed in the anterior pituitary, and sparsely observed in the posterior pituitary...
December 2010: Animal Reproduction Science
Yijing Su, Jing Zhang, Yanchun Tang, Feng Bi, Jian-Ning Liu
Nesfatin-1 is recently reported as a satiety molecule to suppress food intake via the melanocortin signaling in hypothalamus when injected centrally and peripherally. Here we report that nesfatin-1 is also anti-hyperglycemic. It was found that the intravenous injection of nesfatin-1 significantly reduced blood glucose in hyperglycemic db/db mice. This anti-hyperglycemic effect of nesfatin-1 was time-, dose-, insulin-dependent and peripheral.
January 1, 2010: Biochemical and Biophysical Research Communications
Du Wang, Jun Ma, Su Zhang, Anke Hinney, Johannes Hebebrand, Yan Wang, Hai-Jun Wang
Recently, large-scaled studies suggested a negative association of the infrequent allele of the melanocortin-4 receptor (MC4R) V103I polymorphism with obesity. We conducted a Chinese case-control study, meta-analysis in East Asians and in all populations, in order to further assess the association between the V103I polymorphism and reduced body weight and to explore whether the association varies among different ethnic groups. We conducted a case-control study to analyze this polymorphism in 2,012 children of two independent study groups from Beijing, China, no association was found between the V103I polymorphism and obesity or obesity-related phenotypes (P > 0...
March 2010: Obesity
Yi-Bo Zhang, Cai-Feng Ba, Yu-Hong Su, Rui-Xia Zeng
The relationship between MC4R gene polymorphism and body weight in beagle dogs was analyzed. Using gene-specific primers based on canine MC4R exonic sequences a gene fragment was PCR amplified, cloned and sequenced to identify potential polymorphisms. The relationship between a MC4R gene polymorphism detected by PCR-RFLP and canine body weight was analyzed. Three variants were found in beagle dog MC4R DNA sequence, of which two were deletions and one was a transversion which created a PshA I site that could be detected by PCR-RFLP...
October 2006: Yi Chuan, Hereditas
Ernest U Do, Eun Bae Jo, Gyu Choi, Long Zhu Piao, Jaekyoon Shin, Min-Duk Seo, Su-Jin Kang, Bong-Jin Lee, Kang Ho Kim, Jae Bum Kim, Su-il Kim
We have developed fluorescence polarization (FP) assays of human melanocortin 4 receptor (MC4R) in 384-well microtiter plates using TAMRA-NDP-MSH as a tracer. The rank order of potency of agonists and antagonists agrees well relative to the published assays: SHU9119>MTII>NDP alphaMSH>alphaMSH. We have screened libraries of Korean plant extracts and frog peptide analogues in search of MC4R ligands using FP assays and cell-based CRE luciferase reporter assays. We report that FLGFLFKVASK, FLGWLFKVASK, FLGALFKWASK, and FLGWLFKWASK are the peptide analogues, which bind to human MC4R receptor with good affinity in vitro...
May 19, 2006: Biochemical and Biophysical Research Communications
Duo Guo, Yu-Hong Su, Cai-Feng Ba, Bao-Qin Zhu, Yi-Bo Zhang, Ning Li, Qing-Hua Chen, Xue-Jing Gu
In order to detect the polymorphism of T105A in MC1R gene in dogs and to analyze the relationship between the genetic polymorphisms and phenotypes of dog coat color, the blood samples of 111 cross-breed dogs were taken and their genomic DNAs were extracted. The phenotypes of dog coat color were recorded. The T105A locus of MC1R gene in the canine was detected through the technology of PCR-RFLP. Furthermore, the polymorphic fragments at T105A were sequenced. The relationships between the polymorphism of T105A and coat color trait were analyzed by the statistical methods of bivarate correlation analysis...
July 2004: Yi Chuan, Hereditas
Su-Hua Deng, Jun Gao, Jun Ren, Ke-Fei Chen, Neng-Shui Ding, Hua-Shui Ai, Wan-Hua Lin, Wen-Jun Wang, Bao-Sheng Liu, Fen-Ju Lai, Lu-Sheng Huang
Although coat color in pigs has no direct relation with economic traits, it affects economic benefit significantly, coat color selection are widely used in pig breeding and production. PCR-Acc II-RFLP, PCR-BspH I-RFLP and PCR-SSCP were used in combination to analyze genotype at MC1R locus among individuals from 16 full-sib pedigrees and 6 Chinese native breeds including Jinhua, Jiaxing Black, Yushan Black, Leping Spotted, Shanggao Spotted and Shengxian Spotted pig. It was found that the Chinese native pig breeds carry a dominant black allele at MC1R at high frequency, this ED1 allele was suggested to be the major allele controlling black coat color in Chinese native pig breed...
October 2003: Yi Chuan Xue Bao, Acta Genetica Sinica
Sung-Kil Lim, Song-Zhe Li, Yumie Rhee, Sang Su Chung, Yong-Jun Jin, Jong In Yook
Melanocortin is the downstream mediator of leptin signaling and absence of leptin signaling in ob/ob and db/db mice revealed the enhancement of bone formation through the central regulation. While alpha-melanocyte-stimulating hormone (alphaMSH) inhibits the secretion of interleukin-1alpha and tumor necrosis factor-alpha from the inflammatory cells, alphaMSH can also enhance clonal expansion of pro B cells linked to stimulation of osteoclastogenesis. Therefore, we tested the effect of melanocortin on bones. alphaMSH analogues [(6)His]alphaMSH-ND and [(6)Asn]alphaMSH-ND were synthesized and the radio-ligand receptor binding- and cyclic AMP generating activity were analyzed in China Hamster Ovary cell line over- expressing melanocortin receptors...
August 2002: Yonsei Medical Journal
Su Qian, Howard Chen, Drew Weingarth, Myrna E Trumbauer, Dawn E Novi, Xiaoming Guan, Hong Yu, Zhu Shen, Yue Feng, Easter Frazier, Airu Chen, Ramon E Camacho, Lauren P Shearman, Shobhna Gopal-Truter, Douglas J MacNeil, Lex H T Van der Ploeg, Donald J Marsh
Agouti-related protein (AgRP), a neuropeptide abundantly expressed in the arcuate nucleus of the hypothalamus, potently stimulates feeding and body weight gain in rodents. AgRP is believed to exert its effects through the blockade of signaling by alpha-melanocyte-stimulating hormone at central nervous system (CNS) melanocortin-3 receptor (Mc3r) and Mc4r. We generated AgRP-deficient (Agrp(-/-)) mice to examine the physiological role of AgRP. Agrp(-/-) mice are viable and exhibit normal locomotor activity, growth rates, body composition, and food intake...
July 2002: Molecular and Cellular Biology
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