Regional distribution of heterozygous 657del5 mutation carriers of the NBS1 gene in Wielkopolska province (Poland).
The homozygous 657del5 mutation, called Slavic mutation, of the NBS1 gene, causes the Nijmegen Breakage Syndrome (NBS). This syndrome is connected with a high incidence of malignancies in early childhood. A high frequency of NBS heterozygotes was found among patients with melanoma, breast, ovary and prostate cancer. The aim of our research was to determine the frequency of 657del5 mutation of the NBS1 gene in the population of Wielkopolska province. For this purpose, we analysed blood samples from anonymous Guthrie cards. In a group of 2090 newborns from the whole province, we found 16 heterozygous mutation carriers. The frequency of 1/131 is higher than 1/190 reported for populations from other regions in Poland. We observed differential regional distribution of heterozygous 657del5 mutation carriers within the province: among 464 samples from the eastern part of Wielkopolska we found 6 carriers (1/77), in contrast to the southern part without any carrier among 625 samples analysed. The high mean frequency of heterozygous 657del5 mutation (1/131) in Wielkopolska province may be associated with cancer incidence in this region.
Ziółkowska
Iwona
I
Institute of Human Genetics of the Polish Academy of Sciences, Strzeszynska 32, 60-479 Poznań, Poland. iwonus21@wp.pl
Mosor
Maria
M
Nowak
Jerzy
J
D018797:Cell Cycle Proteins / Q000235:genetics*; D006580:Genetic Carrier Screening; D006801:Humans; D007231:Infant, Newborn; D009154:Mutation / Q000235:genetics*; D049932:Nijmegen Breakage Syndrome / Q000453:epidemiology* / Q000235:genetics*; D009687:Nuclear Proteins / Q000235:genetics*; D011044:Poland / Q000453:epidemiology; D015995:Prevalence
D018797:Cell Cycle Proteins; C112156:NBN protein, human; D009687:Nuclear Proteins