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Neuropeptide Y (NPY) has an important role in appetite and body weight regulation. Associations between AIWG and serum NPY levels, and genetic polymorphisms (SNPs) associated with its serum levels have been little studied in these patients.<\/jats:p><\/jats:sec><jats:sec id=\"S0924933800191758_abs2\" sec-type=\"methods\"><jats:title>Subjects and methods<\/jats:title><jats:p>Associations between serum NPY concentration and other metabolic and inflammatory markers, and 215 SNPs in 21 genes (NPY gene, NPY receptor genes and genes encoding arcuate nucleus NPY neuron receptors) were studied in 180 patients with schizophrenia on clozapine treatment.<\/jats:p><\/jats:sec><jats:sec id=\"S0924933800191758_abs3\" sec-type=\"results\"><jats:title>Results<\/jats:title><jats:p>The serum levels of NPY correlated with levels of resistin (<jats:italic>r<\/jats:italic> = 0.31, <jats:italic>P<\/jats:italic> &lt; 0.001) and age (<jats:italic>r<\/jats:italic> = 0.22, <jats:italic>P<\/jats:italic> = 0.003). In the general linear univariate model the best-fitting model with explanatory factors age, serum resistin level, serum insulin level, BMI and gender explained 18.0% (<jats:italic>P<\/jats:italic> &lt; 0.001) of the variance of serum NPY. Genetic risk score (GRS<jats:sub>NPY<\/jats:sub>) analysis found twelve significant (<jats:italic>P<\/jats:italic> &lt; 0.05) serum NPY concentration related SNPs among \u03b17 nicotinic acetylcholine receptor gene CHRNA7, insulin receptor gene INSR, leptin receptor gene LEPR, glucocorticoid receptor (GR) gene NR3C1, and NPY gene. However, after permutation test of gene score the predictive value of GRS<jats:sub>NPY<\/jats:sub> remained non-significant (<jats:italic>P<\/jats:italic> = 0.078).<\/jats:p><\/jats:sec><jats:sec id=\"S0924933800191758_abs4\" sec-type=\"conclusions\"><jats:title>Conclusions<\/jats:title><jats:p>Serum NPY level does not seem to be a feasible biomarker of AIWG. Serum NPY level alterations are not significantly associated with the candidate gene polymorphisms studied.<\/jats:p><\/jats:sec>","DOI":"10.1016\/j.eurpsy.2016.07.004","type":"journal-article","created":{"date-parts":[[2016,11,10]],"date-time":"2016-11-10T06:07:46Z","timestamp":1478758066000},"page":"13-19","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":9,"title":["Association Study of Arcuate Nucleus Neuropeptide Y Neuron Receptor Gene Variation And Serum Npy Levels in Clozapine Treated Patients With 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