Owerbach D, Gabbay K H
Diabetes Research Center, Baylor College of Medicine, Houston.
Am J Hum Genet. 1994 May;54(5):909-12.
Ninety-six multiplex type I diabetic families were typed at the 5' flanking region of the insulin gene by using a PCR assay that better resolves the VNTR into multiple alleles. Affected sibling pairs shared 2, 1, and 0 VNTR alleles--identical by descent--at a frequency of .47, .45, and .08, respectively, a ratio that deviated from the expected 1:2:1 ratio (P < .001). These results confirm linkage of the chromosome 11p15.5 region with type I diabetes mellitus susceptibility.
通过使用一种能更好地将可变数目串联重复序列(VNTR)解析为多个等位基因的聚合酶链反应(PCR)检测法,对96个I型糖尿病多重家庭在胰岛素基因的5'侧翼区域进行分型。受累同胞对分别以0.47、0.45和0.08的频率共享2个、1个和0个通过遗传相同的VNTR等位基因,该比例偏离了预期的1:2:1比例(P < 0.001)。这些结果证实了11号染色体p15.5区域与I型糖尿病易感性之间的连锁关系。