Savukoski M, Kestilä M, Williams R, Järvelä I, Sharp J, Harris J, Santavuori P, Gardiner M, Peltonen L
Department of Human Molecular Genetics, National Public Health Institute, Helsinki, Finland.
Am J Hum Genet. 1994 Oct;55(4):695-701.
We demonstrate here that at least four genetically separate loci are involved in the pathogenesis of human neuronal ceroid lipofuscinoses (NCLs), fatal brain disorders of children. Earlier the assignments of the infantile and juvenile subtypes of NCL to 1p32 and 16p12 had revealed two loci; and here a variant subtype of the late-infantile form of NCL is mapped to a well-defined region on 13q21.1-q32, whereas the clinically similar, classical form of late-infantile NCL was found to represent the fourth, yet-unidentified NCL locus. The linkage disequilibrium was crucial for locus assignment in our highly limited family material, and the data exemplify the significance of this phenomenon in the random mapping of rare human diseases.
我们在此证明,至少有四个基因上相互独立的位点参与了人类神经元蜡样脂褐质沉积症(NCLs)的发病机制,这是一种儿童致命性脑部疾病。此前,婴儿型和青少年型NCL分别定位于1p32和16p12,已揭示了两个位点;在此,晚婴儿型NCL的一个变异亚型被定位到13q21.1-q32的一个明确区域,而临床上相似的经典晚婴儿型NCL被发现代表第四个尚未确定的NCL位点。连锁不平衡对于我们极为有限的家系材料中的位点定位至关重要,这些数据例证了这一现象在罕见人类疾病随机定位中的重要性。