Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: UMLS:C0020505 (hyperphagia)
 6,116 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Ghrelin and peptide YY (PYY) are peptides generally produced by the gastrointestinal organs which are involved in appetite regulation via highly specialized centers in the brain. Abnormal plasma ghrelin and PYY levels compared with controls have been reported for subjects with Prader-Willi syndrome (PWS) which is characterized by infantile hypotonia, poor suck reflex and failure to thrive followed by hyperphagia and marked obesity in early childhood. We studied gene expression of ghrelin, peptide YY, and their receptors (i.e., GHS-R1a, GHS-R1b, and NPY2R) in six different brain regions (frontal cortex, temporal cortex, visual cortex, pons, medulla, and hypothalamus) obtained from three subjects with PWS, two individuals with Angelman syndrome, and six controls to determine if expression of these genes is detectable in different regions of the brain in subjects with and without PWS. In general, expression of these genes using RT-PCR was detected in all subjects and no obvious differences were seen in their pattern of expression between subjects with or without PWS. Additional studies including quantitative gene expression measurements will be required to further evaluate the role of these genes in the eating disorder seen in PWS.
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PMID:Ghrelin, peptide YY and their receptors: gene expression in brain from subjects with and without Prader-Willi syndrome. 1575 36

Stress increases the risk for major depressive disorder (MDD), overeating, and alcohol dependence (AD). The neuropeptide Y system is one of the best-known modulators of the stress response, and some of its effects are mediated through the neuropeptide Y receptor Y2 (NPY2R). The functional NPY2R variant rs6857715 (C-599T) has been implicated in both obesity and AD, but with opposing alleles. The present study explored whether rs6857715 is also associated with MDD. Analysis of the overall sample (595 MDD cases; 1295 controls) showed an association with the AD risk allele C [P=0.020, odds ratio (OR) (C-allele)=1.18]. The association remained significant after excluding MDD patients with AD/alcohol abuse [P=0.038, OR (C-allele)=1.18]; increased weight/appetite [P=0.006, OR (C-allele)=1.23]; or both [P=0.008, OR (C-allele)=1.25]. The present findings suggest that the NPY2R rs6857715 C-allele makes a genuine contribution toward MDD.
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PMID:Association between neuropeptide Y receptor Y2 promoter variant rs6857715 and major depressive disorder. 2758 37