Subjective response to alcohol and ADH polymorphisms in a select sample of young adult male East Indians and Africans in Trinidad and Tobago

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2014-09
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American English
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Alcohol Research Documentation
Abstract

OBJECTIVE:

Level of response to alcohol has been associated with risk of alcohol dependence in a number of ethnic groups. In the present study, subjective and objective responses to alcohol were evaluated in Indo-Trinidadians (Indo-T) and Afro-Trinidadians (Afro-T). Associations of alcohol dehydrogenase polymorphisms with response to alcohol, using the Subjective High Assessment Scale (SHAS), and breath alcohol concentrations (BrAC) were tested. METHOD:

Regular male drinkers without alcohol dependence (n = 112) ages 18-25 years participated in alcohol challenge sessions consisting of placebo and two doses of alcohol (target BrAC: 0 g/dl for placebo, .04 g/dl low dose, and .08 g/dl high dose) and genotyped for variants in ADH1B3 and ADH1C2. RESULTS:

Indo-T had significantly higher BrAC, pulse rates, and cortisol levels when compared with Afro-T but did not have significantly higher SHAS values. Higher responses on the SHAS items muddle/confused and nauseated were significantly associated with the presence of at least one ADH1B3 allele following the high dose of alcohol in Afro-T. Indo-T with at least one ADH1C2 allele displayed significantly different Drug × Time interactions for the SHAS item effects of alcohol at the low dose and for the SHAS items clumsy, muddle/confused, effects of alcohol, floating, drunk, and total at the high dose from Indo-T with two ADH1C*1 alleles. CONCLUSIONS:

This is the first study that has investigated individual sensitivity to alcohol in a Caribbean population and in people of East Indian descent. Indo-T with at least one ADH1C2 allele may be at higher risk for heavy drinking by feeling less of the effects of alcohol, including nausea. In Afro-T, having at least one ADH1B3 allele appears to exert a protective effect by enhancing the unpleasant effects of alcohol, such as nausea and confusion.

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Montane Jaime, L. K., Shafe, S., Liang, T., Wills, D. N., Berg, G. I., & Ehlers, C. L. (2014). Subjective Response to Alcohol and ADH Polymorphisms in a Select Sample of Young Adult Male East Indians and Africans in Trinidad and Tobago. Journal of Studies on Alcohol and Drugs, 75(5), 827–838.
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