Publication: A unique 3.5-kb deletion of the mitochondrial genome in Thai patients with Kearns-Sayre syndrome
Issued Date
1999-01-01
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ISSN
03406717
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2-s2.0-0032763779
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Mahidol University
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SCOPUS
Bibliographic Citation
Human Genetics. Vol.105, No.1-2 (1999), 127-131
Suggested Citation
Patcharee Lertrit, Arisa Imsumran, Pongkiat Karnkirawattana, Voraphan Devahasdin, Tumtip Sangruchi, La Ongsri Atchaneeyasakul, Charoensri Mungkornkarn, Neelobol Neungton A unique 3.5-kb deletion of the mitochondrial genome in Thai patients with Kearns-Sayre syndrome. Human Genetics. Vol.105, No.1-2 (1999), 127-131. doi:10.1007/s004399900062 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/25365
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Title
A unique 3.5-kb deletion of the mitochondrial genome in Thai patients with Kearns-Sayre syndrome
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Abstract
Kearns-Sayre syndrome is one of the neurological diseases caused by a defect in the energy-producing system of mitochondria. Kearns-Sayre is known to be associated with a deletion in the mitochondrial genome and is usually detected in muscle biopsies of the patients. In this study, we report the molecular lesion of mitochondrial DNA (mtDNA) in four Thai patients admitted to hospital with encephalomyopathies. The 3.5-kb deletion of mtDNA was detected by Southern analysis, mapped by amplification with five primer pairs covering almost the total mitochondrial genome, and confirmed by PCR primer shift analysis. The deleted position was localized to nt 10208/13765 or nt 10204/13761 spanning the coding area of subunits 3 (ND3), 4L (ND4L), 4 (ND4), and 5 (ND5) of respiratory chain enzyme complex I and the tRNA genes for histidine, serine, leucine, and arginine. The sequence flanking the deletion was a 4-bp repeat of TCCC. All four patients have exactly the same 3558-bp mtDNA deletion; this is the only deleted position in their mtDNA but is different from those reported in the literature. The deletion seems to be found only in Thai patients, although they present with different clinical manifestations and none of them is not related.