对TK2缺乏症患者的临床和遗传分析
Francisco Ceballos1, Pablo Serrano-Lorenzo1, Laura Bermejo-Guerrero1
1From the Spanish Network for Biomedical Research in Rare Diseases (CIBERER) (F.C., P.S.-L., A.B., Jorge Amigo, P.M., C.A., E.G.-A., N.M., T.J., A.N., J. Arenas, A.C., R.M., M.A.M., C.D.-G.); Mitochondrial and Neuromuscular Research Group '12 de Octubre' (P.S.-L., A.B., J. Arenas, M.A.M., C.D.-G.), Hospital Research Institute (imas12); Neurology Department (L.B.-G.), Neuromuscular Disorders Unit, Hospital 12 de Octubre; Genetics Department (J.F.Q.-E., M.A.M.), Hospital Universitario 12 de Octubre, Madrid; Fundación Pública Galega de Medicina Xenómica (FPGMX) (J. Amigo, A.C.); Genetic's Group (J. Amigo, A.C.), Santiago de Compostela Research Institute (IDIS); Medicine Xenómica's Group (J. Amigo, A.C.), Research Center for Molecular Medicine and Chronic Diseases (CIMUS), Santiago de Compostela University (USC); Department of Genetics and Genomics (P.M., C.A.), Instituto de Investigación Sanitaria-Fundación Jiménez Díaz University Hospital; Bioinformatics Unit (P.M.), Health Research Institute-Fundación Jiménez Díaz University Hospital, Universidad Autónoma de Madrid (IIS-FJD, UAM), Madrid; Department of Clinical and Molecular Genetics (E.G.-A.), Valld'Hebron University Hospital; Research Group on Neuromuscular and Mitochondrial Disorders (E.G.-A., R.M.), Vall d'Hebron Research Institut (VHIR), Universitat Autónoma de Barcelona; Neuromuscular Unit (N.M.), Department of Neurology, Hospital Universitari I Politècnic La Fe, Neuromuscular and Ataxias Research Group, Instituto de Investigación Sanitaria La Fe; Department of Genetics (T.J.), Hospital Universitari I Politècnic la Fe de Valencia; Neuromuscular Unit (A.N.), Neurology Department, Sant Joan de Déu Research Institute, Sant Joan de Déu Hospital, Barcelona; Neurology Department (B.G.-R., C.P.), Neuromuscular Disorders Unit, Instituto de Biomedicina de Sevilla, Hospital U. Virgen del Rocío; and Spanish Network for Biomedical Research in Neurodegenerative Diseases (CIBERNED) (C.P.), Madrid, Spain.
胺基因酶2缺乏症 (TK2d) 往往是晚发症的,特别是在西班牙,由于特定的变异和血缘关系. 提高意识对于早期干预这种线粒体DNA维护障碍至关重要.
科学领域:
- 遗传学 是一个遗传学.
- 线粒体生物学 线粒体生物学
- 神经学 神经学
背景情况:
- 乙胺基因酶2缺乏症 (TK2d) 是一种罕见的,自体逆性疾病,影响线粒体DNA维护.
- TK2d与线粒体DNA枯竭或多重删除有关,导致肌肉病.
- 虽然在儿童中往往是致命的,但在青少年/成年人中存在较温和的发病形式,可能被诊断不足.
研究的目的:
- 在西班牙患者队列中描述TK2d的临床表型.
- 调查西班牙特定TK2变异的遗传基础和流行情况.
- 为了突出晚发性TK2d的频率.
主要方法:
- 来自7个西班牙中心的53名双TK2病原变异患者的回顾性分析.
- 使用Runs of Homozygosity对等基因频率,共同祖先哈普洛类型和变异凝聚的研究.
- 临床数据汇编,重点关注症状发作和疾病进展.
主要成果:
- 60%的患者 (32/53) 在12岁以后出现症状 (晚期发病).
- 两种特定的TK2变种 (p.Lys202del,p.Thr108Met) 在西班牙明显更普遍,可能是由于创始人影响和血缘关系.
- 晚发病例经常携带p.Lys202del变种 (46.9%).
结论:
- 特定的TK2变种和血缘关系的增加使得西班牙的TK2d频率更高.
- 晚发病例的高比例表明,在其他人口中,潜在的诊断不足.
- 提高对TK2d的认识对于及时诊断和干预至关重要,改善患者的治疗结果.


