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BDNF Val66Met polymorphism, energy intake and BMI: a follow-up study in schoolchildren at risk of eating disorders.
BMC Public Health 2010; 10:363BP

Abstract

BACKGROUND

Eating disorders (ED) have a multifactorial aetiology in which genetics play an important role. Several studies have found an association between the Val66Met (G196A) polymorphism of the Brain-Derived Neurotrophic Factor (BDNF) and Eating disorders.The aim of this study was to determine the association of the Val66Met (G196A) polymorphism of the BDNF gene and its effect on eating disorders (ED), energy intake and BMI in schoolchildren.

METHODS

Two-year cohort study (preadolescence to adolescence). From an initial sample of 1336 Caucasian children (mean age = 11.37 years), a group at risk of ED (n = 141) and a control group (n = 117) were selected using the Children's Eating Attitudes Test. Two years later, they were re-classified into an at-risk group (n = 41) and a control group (n = 159) using the Eating Attitudes Test. The diagnosis of the individuals at risk of ED was confirmed by means of the Diagnostic Interview for Children and Adolescents. BMI, energy intake and the Val66Met (G196A) polymorphism of the BDNF gene were analysed in the at-risk and control groups.

RESULTS

The frequency of genotypes of the Val66Met (G196A) polymorphism of the BDNF gene is 28.6% (95% CI: 22.4-34.9) in the heterozygous form (Val/Met) and 5% (95% CI: 2.4-9) in the homozygous form (Met/Met). We detected no association between Val66Met genotypes and the severity of ED. Over time, the carriers of the Met66 allele with a persistent risk of ED significantly restricted energy intake (507 Kcal/day; p = 0.033).

CONCLUSION

We have not found an association between Val66Met (G196A) polymorphism of the BDNF and ED in schoolchildren from general population. The relationship found between this polymorphism and energy intake restriction in adolescents with a persistent risk of ED should be replicated in a larger sample.

Authors+Show Affiliations

IISPV, Unitat de Medicina Preventiva i Salut Pública., Universitat Rovira i Virgili, Spain.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

20573217

Citation

Arija, Victoria, et al. "BDNF Val66Met Polymorphism, Energy Intake and BMI: a Follow-up Study in Schoolchildren at Risk of Eating Disorders." BMC Public Health, vol. 10, 2010, p. 363.
Arija V, Ferrer-Barcala M, Aranda N, et al. BDNF Val66Met polymorphism, energy intake and BMI: a follow-up study in schoolchildren at risk of eating disorders. BMC Public Health. 2010;10:363.
Arija, V., Ferrer-Barcala, M., Aranda, N., & Canals, J. (2010). BDNF Val66Met polymorphism, energy intake and BMI: a follow-up study in schoolchildren at risk of eating disorders. BMC Public Health, 10, p. 363. doi:10.1186/1471-2458-10-363.
Arija V, et al. BDNF Val66Met Polymorphism, Energy Intake and BMI: a Follow-up Study in Schoolchildren at Risk of Eating Disorders. BMC Public Health. 2010 Jun 23;10:363. PubMed PMID: 20573217.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - BDNF Val66Met polymorphism, energy intake and BMI: a follow-up study in schoolchildren at risk of eating disorders. AU - Arija,Victoria, AU - Ferrer-Barcala,Marta, AU - Aranda,Nuria, AU - Canals,Josepa, Y1 - 2010/06/23/ PY - 2009/06/23/received PY - 2010/06/23/accepted PY - 2010/6/25/entrez PY - 2010/6/25/pubmed PY - 2013/2/15/medline SP - 363 EP - 363 JF - BMC public health JO - BMC Public Health VL - 10 N2 - BACKGROUND: Eating disorders (ED) have a multifactorial aetiology in which genetics play an important role. Several studies have found an association between the Val66Met (G196A) polymorphism of the Brain-Derived Neurotrophic Factor (BDNF) and Eating disorders.The aim of this study was to determine the association of the Val66Met (G196A) polymorphism of the BDNF gene and its effect on eating disorders (ED), energy intake and BMI in schoolchildren. METHODS: Two-year cohort study (preadolescence to adolescence). From an initial sample of 1336 Caucasian children (mean age = 11.37 years), a group at risk of ED (n = 141) and a control group (n = 117) were selected using the Children's Eating Attitudes Test. Two years later, they were re-classified into an at-risk group (n = 41) and a control group (n = 159) using the Eating Attitudes Test. The diagnosis of the individuals at risk of ED was confirmed by means of the Diagnostic Interview for Children and Adolescents. BMI, energy intake and the Val66Met (G196A) polymorphism of the BDNF gene were analysed in the at-risk and control groups. RESULTS: The frequency of genotypes of the Val66Met (G196A) polymorphism of the BDNF gene is 28.6% (95% CI: 22.4-34.9) in the heterozygous form (Val/Met) and 5% (95% CI: 2.4-9) in the homozygous form (Met/Met). We detected no association between Val66Met genotypes and the severity of ED. Over time, the carriers of the Met66 allele with a persistent risk of ED significantly restricted energy intake (507 Kcal/day; p = 0.033). CONCLUSION: We have not found an association between Val66Met (G196A) polymorphism of the BDNF and ED in schoolchildren from general population. The relationship found between this polymorphism and energy intake restriction in adolescents with a persistent risk of ED should be replicated in a larger sample. SN - 1471-2458 UR - https://www.unboundmedicine.com/medline/citation/20573217/BDNF_Val66Met_polymorphism_energy_intake_and_BMI:_a_follow_up_study_in_schoolchildren_at_risk_of_eating_disorders_ L2 - https://bmcpublichealth.biomedcentral.com/articles/10.1186/1471-2458-10-363 DB - PRIME DP - Unbound Medicine ER -