Association of the leucine-7 to proline-7 variation in the signal sequence of neuropeptide Y with major depression

作者：Koefoed Pernille^*; Woldbye David P D; Hansen Thomas v O; Eplov Lene F; Christiansen Soren H; Mors Ole; Kessing Lars V; Werge Thomas; Kaipio Katja; Pesonen Ullamari; Fahmy Thomas; Mellerup Erling; Jakobsen Klaus D; Hansen Elsebeth S; Knudsen Gitte M; Bukh Jens D; Bock Camilla; Lindberg Camilla; Kristensen Ann S; Dam Henrik; Nordentoft Merete; Als Thomas D; Wang August G; Gether Ulrik; Rehfeld Jens F; Bolwig Tom G

来源：Acta Neuropsychiatrica, 2012, 24(2): 81-90.

DOI：10.1111/j.1601-5215.2011.00600.x

• candidate gene approach
• case-control association study
• NPY Leu7Pro
• major depression

Objective: There is clear evidence of a genetic component in major depression, and several studies indicate that neuropeptide Y (NPY) could play an important role in the pathophysiology of the disease. A well-known polymorphism encoding the substitution of leucine to proline in the signal peptide sequence of NPY (Leu7Pro variation) was previously found to protect against depression. Our study aimed at replicating this association in a large Danish population with major depression. %26lt;br%26gt;Method: Leu7Pro was studied in a sample of depressed patients and ethnically matched controls, as well as psychiatric disease controls with schizophrenia. Possible functional consequences of Leu7Pro were explored in vitro. %26lt;br%26gt;Results: In contrast to previous studies, Pro7 appeared to be a risk allele for depression, being significantly more frequent in the depression sample (5.5%, n = 593; p = 0.009; odds ratio, OR: 1.46) as compared to ethnically matched controls (3.8%, n = 2912), while schizophrenia patients (4.1%, n = 503) did not differ. In vitro, the Pro7 substitution appeared to be associated with reduced levels of NPY without affecting its mRNA level. %26lt;br%26gt;Conclusion: The Leu7Pro variation may increase the risk of major depression, possibly by affecting the biosynthesis of NPY.

• 出版日期2012-4
• 单位上海市精神卫生中心