Phát hiện một trường hợp mang đột biến A3243 thuộc hội chứng MELAS

• Main Authors: Phùng, Bảo Khánh, Nguyễn, Minh Hoàng, Phạm, Vân Anh, Lê, Ngọc Anh, Cao, Vũ Hùng, Phan, Tuấn Nghĩa
• Format: Article
• Language: Vietnamese
• Published: Đại học Quốc gia Hà Nội 2017
• Subjects: Đột biến A 3243; Hội chứng MELAS; PCR-RFLP; Real-time PCR
• Online Access: http://repository.vnu.edu.vn/handle/VNU_123/60765
• Institution: Vietnam National University, Hanoi

Mitochondrial genome A3243G mutation in the tRNALeu(UUR) encodinggene (MTTL)is the main cause of mitochondrial encephalopathy, lactic acidosis and stroke-like episodes (MELAS). This mutation exists in heteroplasmic form and severity of the disease is affected by many factors including heteroplasmy level. In this study, a pediatric proband (female, 8 years old) was found to carry A3243G mutation at 77.6% of heteroplasmy by using PCR-RFLP in combination with real-time PCR. The results of the A3243G mutation analysis of the proband’s family showed that her mother without any symptoms of encephalopathyalso carried the mutation at 7.9% of heteroplasmy whereas the mutation was not found in the proband’s healthy father and healthy sister, indicating that the proband received the A3243G mutation from her mother and the expression of MELAS syndromes depended on the level of heteroplasmy.