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Lactase non-persistent genotype influences milk consumption and gastrointestinal symptoms in Northern Russians

Khabarova, Yulia; Torniainen, Suvi; Tuomisto, Sari; Järvelä, Irma; Karhunen, Pekka J; Isokoski, Mauri; Mattila, Kari (2011)

 
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Khabarova, Yulia
Torniainen, Suvi
Tuomisto, Sari
Järvelä, Irma
Karhunen, Pekka J
Isokoski, Mauri
Mattila, Kari
2011

BMC Gastroenterology 11
124
Lääketieteen yksikkö - School of Medicine
This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.
doi:10.1186/1471-230X-11-124
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Julkaisun pysyvä osoite on
https://urn.fi/urn:nbn:uta-3-750

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BioMed Central Open access
Tiivistelmä
Background

Milk is an important source of nutrients. The consumption of milk, however, may cause abdominal complaints in lactose intolerant individuals. The frequency of -13910C/C genotype is known to be high among Northern Russians, exceeding the prevalence in northern Europe. In our study we tested two hypotheses: 1) subjects with lactase non-persistent genotype (-13910C/C) have more gastrointestinal (GI) symptoms associated with milk 2) subjects with lactase non-persistence avoid using milk.
Methods
In total, 518 students aged 17 to 26 years were randomly selected from different departments in the Northern State Medical University (NSMU) for genotyping the lactase activity-defining -13910C/T variant. All subjects filled in a questionnaire covering their personal data, self-reported GI symptoms and milk consumption habits.
Results
Northern Russians consume very small amounts of milk daily. Among carriers of the lactase non-persistent (LNP) genotype there were 10 percentage units of milk-consumers fewer than among lactase-persistent (LP) subjects (p = 0.03). Complaints of GI disorders caused by milk were different between the genotypes (p = 0.02). Among all types of food analyzed only milk was associated with increased GI symptoms among subjects with the LNP genotype (OR =1.95, CI 1.03-3.69)
Conclusions
Subjects with -13910C/C have more GI symptoms from milk. Subjects with lactase non-persistent genotype avoid using milk. In the case of increasing milk consumption symptoms may increase the need for medical consultation. It is thus important either for people themselves or for health care staff to be aware of lactase persistence/non-persistence.
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Kalevantie 5
PL 617
33014 Tampereen yliopisto
oa[@]tuni.fi | Yhteydenotto | Tietosuoja | Saavutettavuusseloste