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Null Allele Frequencies at HLA-G Locus in Iranian Healthy Subjects | ||
Iranian Journal of Immunology | ||
مقاله 3، دوره 5، شماره 4، اسفند 2008، صفحه 207-211 اصل مقاله (275.08 K) | ||
نوع مقاله: Original Article | ||
نویسندگان | ||
Roghayeh Rahimi1؛ Ahmad Zavaran Hosseini* 1؛ Fatemeh Yari2 | ||
1Tarbiat Modares University, School of Medical Sciences | ||
2Research Center, Iranian Blood Transfusion Organization, Tehran, Iran | ||
چکیده | ||
Background: HLA-G gene contains 15 alleles including a null allele, HLA-G*0105N. Previous studies have shown that HLA-G*0105N does not encode the complete HLA-G1 or HLA-G5 isoforms but encodes a functional HLA-G protein with the ability to in-hibit NK cell cytolysis. Thus, although the biological functions of HLA-G1 and HLA-G5 proteins are abrogated, other isoforms such as HLA-G2 can replace their roles. Stud-ies on the null allele of HLA-G gene could be useful in understanding the genetic vari-ants of HLA-G alleles in ethnic groups. Objective: The goal of this research was to de-termine the frequency of HLA-G*0105N null allele in Iranian healthy subjects. Meth-ods: The frequency of HLA-G*0105N null allele was evaluated in Iranian healthy sub-jects by PCR-RFLP method. Genomic DNA was isolated from the whole blood of 100 randomly selected, healthy, unrelated Iranian individuals using salting-out technique followed by PCR amplification of the exon 3 of HLA-G gene. PCR products were di-gested with PpUM-1 and the resulted fragments were analyzed using gel electrophore-sis. Results: In this study the restriction enzyme digestion confirmed homozygous HLA-G*0105N null allele for 9 % of the population. Furthermore obtained results indi-cated that the total frequency of HLA-G*0105N null allele was 20 % in the studied population of Iran. Conclusion: The final data analysis showed that the total frequency of this allele in Iranian people was higher than other ethnic groups that have been stud-ied so far. | ||
کلیدواژهها | ||
Frequency؛ HLA-G*0105N antigen؛ Iran؛ RFLPs | ||
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