[Study on the polymorphism of killer cell immunoglobulin like receptor (KIR) gene with systemic lupus erythematosus of North population in China].

AIM: To investigate the polymorphism of KIR genes in systemic lupus erythematosus (SLE) patients, and to study the correlation between KIR genes and susceptibility of SLE. METHODS: The polymorphism of KIR genes were detected by PCR-SSP technique in 62 patients with SLE and 61 healthy persons as controls from North of China. RESULTS: The differences of KIR frequency between the SLE group and the control were tested by statistical analysis. The most frequent genotype was KIR 3DP1, 2DL1, 2DP1, 3DL1, 2DL3, 1D, followed by 2DS4, 2DL5, 3DS1, 2DS2, 2DS5 and 2DL2. KIR 2DS1, 2DS3 and 3DP1v were lower in frequency compared with others. The frequency of KIR 3DS1, 2DL2, 2DL5 and 2DL3 were significantly lower in SLE group than that in the control èP<0.01é. CONCLUSION: There may be a association between the polymorphism of KIR genes with SLE in North of China should be investigated further.

[Polymorphism of killer cell immunoglobulin-like receptor gene and its correlation with leukemia].

The study was purposed to investigate the polymorphism of killer cell immunoglobulin-like receptor (KIR) gene of the patients with leukemia and to explore the correlation between the KIR gene and susceptibility of leukemia. The KIR genotype of 50 patients with leukemia and 60 healthy controls in northern. Hans were analyzed by PCR-SSP. The results indicated that the present known 18 KIR genes were detected and identified. The frequencies of KIR 3DL3, 3DL2 and 2DL4 were 100% in all subjects, with the most frequent genotype KIR 3DP1 (0.86) followed by 2DP1, 2DL3, 3DL1, 2DL1, 3DS1, 2DL5, 2DS4, 2DS2, 1D, 2DS5, 2DL2, 2DS1, 2DS3 and 3DP1v in leukemia successively. Compared with the control, the KIR 3DL1 (0.60) and 2DL1 (0.57) were significantly lower in the leukemia patient group than that in the control group (1.00) (P < 0.01). It is concluded that the polymorphism of KIR gene is associated with susceptibility of leukemia in Hans. There may be a negative correlation between pathogenesis of leukemia and KIR 3DL1, KIR 3DS1, KIR 2DL1, KIR 2DL5 genes.

[Distribution features of HLA-DRB1 allele frequencies in normal cord blood donors of 3 438 Shandong Hans].

The objective of the study was to research the distribution features of HLA-DRB1 alleles in Shandong Hans' population and explore the possibility of finding the cord blood donor of HLA-DR matched to perform the stem cell transplantation for more patients from larger region of China and even other areas in the world. The subjects of the study were drawn from 3 438 Shandong Hans donors in Shandong Umbilical Cord Blood Bank and were tested by PCR-SSP technique for HLA-DR low resolution typing. The result indicated that the most prevalent five alleles of HLA-DRB1 locus were DRB1 * 15 (0.1817), * 07 (0.1369), * 09 (0.1221), * 04 (0.1084) and * 12 (0.1038). The DR18 has the lowest gene frequency 0.0003, while DRB1 * 10, * 16 and * 01 showed lower gene frequencies (GF), which GF were 0.0151, 0.0262, and 0.0322 respectively. As compared the HLA-DRB1 GF of Shandong Hans with those of other Han Chinese and other ethnic populations, there were unique distributed features of DRB1 alleles among various races populations, and those among the studied population groups from various regions with the same race origin. The difference from various regions in the same race was less than that among different races. In conclusion, a patient of Han Chinese is easier to search a DR-matched cord blood donor in Shandong Umbilical Cord Blood Bank, especially from northern Hans. No DRB1 allele is unique to single racial group and majority of DRB1 low-resolution phenotypes are common to all studied groups. It is reasonable for some patients from other races including Caucasian and Japanese to receive a transplant of cord blood stem cell matched with HLA-DR in Shandong Umbilical Cord Blood Bank.