AIM:To estimate the prevalence of the lactase non-persistent genotype(C/C-13910)in a northern Russian population in accordance with ethnicity,and to evaluate self-reported milk consumption depending on lactase activit...AIM:To estimate the prevalence of the lactase non-persistent genotype(C/C-13910)in a northern Russian population in accordance with ethnicity,and to evaluate self-reported milk consumption depending on lactase activity. METHODS:Blood samples for genotyping lactase activity,defining the C/T-13910 variant by polymerase chain reaction,and direct sequencing were taken from 231 medical students of Russian origin aged 17-26 years. We analyzed milk product consumption by questionnaire which was specially designed for the estimation of milk consumption and abdominal complaints. RESULTS:We found that the prevalence of the C/C-13190 genotype in the northern Russian population was 35.6%.The other genotypes nearby C/T-13910 and associated with lactase activity were not present in the study population.The consumption of milk among people with the non-persistent genotype tended to be lower than among the lactose tolerant subjects,but was not statistically significant.CONCLUSION:An investigation of the lactase persistent genotype in a northern Russian population has not been performed before.The genotype did not affect the consumption of milk products in this population which could be explained by low consumption of milk products among the entire study population.展开更多
AIM: To defi ne the frequency of the C/T-13910 variant associated with lactase persistence/non-persistence trait and to analyze the milk consumption of lactase non- persistent subjects in Estonia. METHODS: We genotype...AIM: To defi ne the frequency of the C/T-13910 variant associated with lactase persistence/non-persistence trait and to analyze the milk consumption of lactase non- persistent subjects in Estonia. METHODS: We genotyped 355 Estonians by polymerase chain reaction and direct sequencing. Milk consumption was analyzed by a questionnaire, specially developed to analyze milk consumption and abdominal complaints. RESULTS: The frequency of the genotype of the C/ C-13910 (lactase non-persistence) was found to be 24.8% in native Estonians. No other single nucleotide polymorphisms covering the region of 400 bp adjacent to the C/T-13910 variant were found. Lactase non- persistence subjects were found to consume less milk than lactase persistence subjects. CONCLUSION: The frequency of lactase non- persistence defi ned by the C/C-13910 genotype confi rms the results of the previous studies based on indirect methods of determining hypolactasia. Milk consumption of lactase non-persistence subjects is consistent with previously reported figures of adult-type hypolactasia in Estonia. However, lactase non-persistence does not prevent the intake of milk in many adults.展开更多
基金The Sigrid Jusélius Foundation,Helsinki,Finland and Tampere University Hospital Research Funds
文摘AIM:To estimate the prevalence of the lactase non-persistent genotype(C/C-13910)in a northern Russian population in accordance with ethnicity,and to evaluate self-reported milk consumption depending on lactase activity. METHODS:Blood samples for genotyping lactase activity,defining the C/T-13910 variant by polymerase chain reaction,and direct sequencing were taken from 231 medical students of Russian origin aged 17-26 years. We analyzed milk product consumption by questionnaire which was specially designed for the estimation of milk consumption and abdominal complaints. RESULTS:We found that the prevalence of the C/C-13190 genotype in the northern Russian population was 35.6%.The other genotypes nearby C/T-13910 and associated with lactase activity were not present in the study population.The consumption of milk among people with the non-persistent genotype tended to be lower than among the lactose tolerant subjects,but was not statistically significant.CONCLUSION:An investigation of the lactase persistent genotype in a northern Russian population has not been performed before.The genotype did not affect the consumption of milk products in this population which could be explained by low consumption of milk products among the entire study population.
基金Supported by the Estonian Science Foundation grant No. 6452, Sigrid Jusélius Foundation, Helsinki, Finland and Helsinki University Hospital Research Funding, University of Helsinki, Finland
文摘AIM: To defi ne the frequency of the C/T-13910 variant associated with lactase persistence/non-persistence trait and to analyze the milk consumption of lactase non- persistent subjects in Estonia. METHODS: We genotyped 355 Estonians by polymerase chain reaction and direct sequencing. Milk consumption was analyzed by a questionnaire, specially developed to analyze milk consumption and abdominal complaints. RESULTS: The frequency of the genotype of the C/ C-13910 (lactase non-persistence) was found to be 24.8% in native Estonians. No other single nucleotide polymorphisms covering the region of 400 bp adjacent to the C/T-13910 variant were found. Lactase non- persistence subjects were found to consume less milk than lactase persistence subjects. CONCLUSION: The frequency of lactase non- persistence defi ned by the C/C-13910 genotype confi rms the results of the previous studies based on indirect methods of determining hypolactasia. Milk consumption of lactase non-persistence subjects is consistent with previously reported figures of adult-type hypolactasia in Estonia. However, lactase non-persistence does not prevent the intake of milk in many adults.
基金Supported by The Sigrid Juselius Foundation, Helsinki, Finland The Helsinki University Hospital Research Funding, Helsinki, Finland The Helsinki University Science Foundation, Helsinki, Finland and The Foundation of Nutrition Research, Helsinki, Finland
