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Chinese Journal of Brain Diseases and Rehabilitation(Electronic Edition) ›› 2022, Vol. 12 ›› Issue (06): 355-359. doi: 10.3877/cma.j.issn.2095-123X.2022.06.007

• Clinical Research • Previous Articles     Next Articles

Effect of BDNF Val66Met gene polymorphism on the efficacy of delayed encephalopathy after acute carbon monoxide poisoning in patients

Yong Zhang1,(), Li Zhou2, Bin He3   

  1. 1. Department of Emergency, The First People's Hospital of Longquanyi District, Chengdu 610100, China
    2. Department of Emergency, Chengdu Longquanyi District Hospital of Traditional Chinese Medicine, Chengdu 610100, China
    3. Department of Emergency, West China Hospital of Sichuan University, Chengdu 610000, China
  • Received:2022-04-21 Online:2022-12-15 Published:2023-01-20
  • Contact: Yong Zhang

Abstract:

Objective

To investigate the effect of BDNF Val66Met gene polymorphism on the efficacy of delayed encephalopathy after acute carbon monoxide poisoning (DEACMP).

Methods

A total of 102 cases of DEACMP inpatients admitted to Neurosurgery Department of West China Hospital of Sichuan University from February 2018 to March 2020 were selected as study subjects. All patients were given unified treatment measures, and were divided into effective group and ineffective group according to the treatment effect. BDNF Val66Met gene polymorphism was detected, and factors affecting the treatment effect of DEACMP patients were analyzed.

Results

(1) After treatment, 48 of 102 patients were significantly effective, 31 were effective, and were included in the effective group; 23 cases with no effect were included in the ineffective group. The overall effective rate was 77.45%. (2) The genotype distribution of the effective group and the ineffective group conformed to the Hardy-Weinberg equilibrium test law (P>0.05); The difference in BDNF Val66Met allele frequency between the effective group and the ineffective group was statistically significant (P<0.05), and the Met allele frequency of the ineffective group was higher than that of the effective group (P<0.05); Under the implicit model (Met/Met vs Val/Val+Val/Met), there was statistically significant difference in the distribution of BDNF Val66Met genotypes between the effective group and the ineffective group (P<0.05), and the proportion of Met/Met genotypes in the ineffective group was significantly higher than that in the effective group (P<0.05). (3) Univariate analysis based on treatment effect of DEACMP patients showed that age, carbon monoxide exposure time, degree of poisoning, BDNF Val66Met gene polymorphism were the factors affecting the efficacy of DEACMP patients (P<0.05); Multivariate analysis based on the therapeutic effect of DEACMP patients showed that age, carbon monoxide exposure time and degree of poisoning were independent risk factors affecting the efficacy of DEACMP patients (P<0.05).

Conclusion

BDNF Val66Met gene polymorphism was related to the efficacy of DEACMP patients, and the efficacy was poor in patients with Met/Met genotype and Met allele of BDNF Val66Met.

Key words: Brain-derived neurotrophic factor, Gene polymorphism, Carbon monoxide poisoning, Delayed encephalopathy, Efficacy

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