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. 1994 Dec 20;91(26):12492–12495. doi: 10.1073/pnas.91.26.12492

Comparison of the heat shock response in ethnically and ecologically different human populations.

V N Lyashko 1, V K Vikulova 1, V G Chernicov 1, V I Ivanov 1, K A Ulmasov 1, O G Zatsepina 1, M B Evgen'ev 1
PMCID: PMC45464  PMID: 7809064

Abstract

In response to heat shock or other metabolic insults, an increased expression of different heat shock proteins (hsps) and, in particular, members of the hsp70 family is observed in human cells. Using two-dimensional electrophoresis, we compared the pattern of hsp70 synthesis in human fibroblast cell lines isolated from two contrasting groups of individuals. The first group was represented by native Turk-men living in the hot desert of Middle Asia; the second group consisted of Russians living in moderate climatic regions of European Russia. This analysis has shown that fibroblasts isolated from Turkmen after severe heat shock exhibited intensive synthesis of all hsps in parallel with synthesis of many other cellular proteins, while only trace synthesis of hsps was observed in the second group (Russians). Surprisingly, Northern analysis of RNA synthesis failed to reveal any differences between the two groups after heat shock treatment. When survival of fibroblasts after severe heat shock treatment was assessed by colony formation assay, the cells of the first group exhibited significantly higher survival rates.

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