Mutation analysis of an adult patient with fructose-1, 6-bisphosphatase deficiency in a Chinese family

Abstract

The gene mutations of a patient with fructose-1, 6-bisphosphatase (FBPase) deficiency and her parents were analyzed and her clinical manifestations, laboratory tests, and genetic characteristics were reviewed. The molecular analysis of FBP1 gene showed a G residue duplication at base 960 in exon 7(c.960dupG) in this patient while her parents carried the heterozygous c. 960dupG mutation. The prominent clinical feature of this patient was the benign course of the disease with age. However, acute attack could be triggered by stress, long-time fasting, a large amounts of fructose intake, etc. The typical clinical manifestations were severe lactic acidosis, hypoglycemia, and elevated liver enzymes. (Chin J Endocrinol Metab, 2017, 33: 752-754) Key words: Fructose-1, 6-bisphosphatase deficiency; Lactic acidosis; Fructose-1, 6-bisphosphatase 1 gene