Inheritance pattern of familial moyamoya disease: autosomal dominant mode and genomic imprinting
- Y Mineharu1,
- K Takenaka3,
- H Yamakawa4,
- K Inoue2,
- H Ikeda5,
- K-I Kikuta1,
- Y Takagi1,
- K Nozaki1,
- N Hashimoto1,
- A Koizumi2
- 1Department of Neurosurgery, Kyoto University Graduate School of Medicine, Kyoto, Japan
- 2Department of Health and Environmental Sciences, Kyoto University Graduate School of Medicine
- 3Department of Neurosurgery, Takayama Red Cross Hospital, Takayama, Gifu, Japan
- 4Department of Neurosurgery, Gifu Prefectural Gero Hot Spring Hospital, Gifu
- 5Department of Neurosurgery, Ohara Medical Center, Fukushima, Japan
- Correspondence to: A Koizumi Department of Health and Environmental Sciences, Kyoto University Graduate School of Medicine, Konoe-cho, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan;
- Received 18 April 2006
- Accepted 9 June 2006
- Revised 5 June 2006
- Published Online First 20 June 2006
Background: Although the aetiology of moyamoya disease (MMD) has not been fully clarified, genetic analysis of familial MMD (F-MMD) has considerable potential to disclose it.
Objective: To determine the inheritance pattern and clinical characteristics of F-MMD to enable precise genetic analyses of the disease.
Methods: 15 highly aggregated Japanese families (52 patients; 38 women and 14 men) with three or more affected members were examined. The difference in categories of age at onset (child onset, adult onset and asymptomatic) between paternal and maternal transmission was compared by χ2 statistics.
Results: In all families there had been three or more generations without consanguinity, and all types of transmission, including father-to-son, were observed. Among a total of 135 offspring of affected people, 59 (43.7%) were patients with MMD or obligatory carriers. Affected mothers were more likely to produce late-onset (adult-onset or asymptomatic) female offspring (p = 0.007).
Conclusions: The mode of inheritance of F-MMD is autosomal dominant with incomplete penetrance. Thus, in future genetic studies on F-MMD, parametric linkage analyses using large families with an autosomal dominant mode of inheritance are recommended. Genomic imprinting may be associated with the disease.
- F-MMD, familial moyamoya disease
- MMD, moyamoya disease
- MRA, magnetic resonance angiography
- MRI, magnetic resonance imaging
Published Online First 20 June 2006
Competing interests: None declared.