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Reanalysis of an Old Order Amish pedigree, to include several new individuals and two changes in clinical status, markedly reduces the probability of linkage between bipolar affective disorder and the Harvey-ras-1 oncogene and insulin loci on chromosome 11. This linkage can be excluded using a large lateral extension of the original Amish pedigree.
The authors review the goals, methods, sample, and selected epidemiologic findings from a collaborative study of affective disorders among the Amish. This culturally and genetically homogeneous population (N = 12,500) constitutes an excellent research setting for psychiatric epidemiologic and genetic study. Alcoholism, drug abuse, and sociopathy did not… (More)
An analysis of the segregation of restriction fragment length polymorphisms in an Old Order Amish pedigree has made it possible to localize a dominant gene conferring a strong predisposition to manic depressive disease to the tip of the short arm of chromosome 11.
OBJECTIVE A prospective study of psychiatrically well Amish children to determine differences in the frequency and pattern of clinical features that may be prodromal for bipolar I disorder. METHOD Children with a bipolar I parent (n = 100) and children of well parents in a matched control sample (n = 110) were assessed annually for 7 years with… (More)
OBJECTIVE Prospective study of well children at risk of bipolarity to identify the frequency and pattern of potentially prodromal symptoms/behaviors for bipolar disorder type I (BPI) disorder. METHOD A total of 110 at-risk children with a BPI parent and 112 children with well parents were studied. Ten-year data collection used structured and… (More)
Ellis-van Creveld syndrome (EvC; MIM 225500) is an autosomal recessive chondrodysplastic dwarfism. Thus far, the identified mutations in the EVC gene located on chromosome 4p16 have only accounted for illness in a small proportion of affected individuals. In this report we describe a novel gene, EVC2, that is mutated in an Ashkenazi individual with EvC… (More)
Genetic linkage studies were conducted on five Old Order Amish bipolar pedigrees in 1979 and 1982, with 94 members tested for color blindness and typed for 42 red blood cell and related markers in 17 antigen systems. Also, 59 individuals in two pedigrees were typed for HLA, Bf, and GLO. Linkage analyses assuming X-linkage and autosomal inheritance of… (More)
The most characteristic features of bipolar affective disorder (manic-depressive illness) are episodes of mania (bipolar I, BPI) or hypomania (bipolar II, BPII) interspersed with periods of depression. Manic-depressive illness afflicts about one percent of the population, and if untreated, is associated with an approximately 20% risk of suicide. Twin,… (More)