A neonatal-onset succinyl-CoA:3-ketoacid CoA transferase (SCOT)-deficient patient with T435N and c.658-666dupAACGTGATT p.N220_I222dup mutations in the OXCT1 gene.

Journal of Inherited Metabolic Disease
Toshiyuki FukaoTomonobu Hasegawa

Abstract

Succinyl-CoA:3-ketoacid CoA transferase (SCOT) deficiency causes episodic ketoacidotic crises and no apparent symptoms between them. Here, we report a Japanese case of neonatal-onset SCOT deficiency. The male patient presented a severe ketoacidotic crisis, with blood pH of 7.072 and bicarbonate of 5.8 mmol/L at the age of 2 days and was successfully treated with intravenous infusion of glucose and sodium bicarbonate. He was diagnosed as SCOT deficient by enzymatic assay and mutation analysis. At the age of 7 months, he developed a second ketoacidotic crisis, with blood pH of 7.059, bicarbonate of 5.4 mmol/L, and total ketone bodies of 29.1 mmol/L. He experienced two milder ketoacidotic crises at the ages of 1 year and 7 months and 3 years and 7 months. His urinary ketone bodies usually range from negative to 1+ but sometimes show 3+ (ketostix) without any symptoms. Hence, this patient does not show permanent ketonuria, which is characteristic of typical SCOT-deficient patients. He is a compound heterozygote of c.1304C > A (T435N) and c.658-666dupAACGTGATT p.N220_I222dup. mutations in the OXCT1 gene. The T435N mutation was previously reported as one which retained significant residual activity. The latter novel mutation was reve...Continue Reading

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Citations

Feb 20, 2013·Journal of Inherited Metabolic Disease·Naeem ShafqatWyatt W Yue
Apr 8, 2014·Journal of Inherited Metabolic Disease·Toshiyuki FukaoYuka Aoyama
Jan 7, 2015·Pediatrics International : Official Journal of the Japan Pediatric Society·Tomohiro HoriToshiyuki Fukao
Jul 12, 2017·Journal of Inherited Metabolic Disease·Hideo SasaiToshiyuki Fukao

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