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[Killer immunoglobulin-like receptor gene genotype and expression pattern in healthy people]

Li-Ping Dou, Wan-Ming DA, Wen-Rong Huang, Hong-Hua Li, Yu Zhao, Quan-Shun Wang, Chun-Ji Gao, Li Yu
Zhongguo Shi Yan Xue Ye Xue za Zhi 2010, 18 (1): 132-5
20137133
The aim of study was to clarify the repertoire of killer immunoglobulin-like receptor (KIR) at the level of DNA and RNA in healthy persons and to compare KIR on genotypes and expression patterns. KIR genotypes including KIR2DL1, 2DL2, 2DL3, 2DL4, 2DL5, 2DS1, 2DS2, 2DS3, 2DS4, 2DS5, 3DL1, 3DL2, 3DL3, 3DS1, 2DP1 and 3DP1 were analyzed by PCR. The phenotypes including KIR2DL1, KIR2DL2, KIR2DL3, KIR3DL1, KIR2DS1, KIR2DS3, KIR2DS2/4 gene were determined by RT-PCR. The results showed that the genes of KIR2DL1, KIR2DL3, KIR2DL4, KIR3DL2, KIR3DL3 and KIR3DP1 could be detected in all healthy persons, NK-92MI cells and Molt4 cells, but all corresponding receptors were not expressed by Molt4 T cells. Only partial transcripts of KIR2DL1, KIR2DL3 and KIR2DS2/4 were detectable in NK-92MI cells. If genotypes of KIR2DL1, 2DL2, 2DL3, 2DS1, 2DS2, 2DS3 and 2DS4 were detected in healthy persons, almost all transcripts of corresponding receptors were expressed in peripheral blood NK cells. The expression levels of KIR were different. In conclusion, the repertoires of KIR are individually specific. The expression pattern of KIR is also specific, the expression levels of different KIRs are different in one individual, and the expression levels of the same KIR are also different in different individuals.

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