1. Two loss-of-function ANKRD11 variants in Chinese patients with short stature and a possible molecular pathway.
- Author
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Zhang T, Yang Y, Yin X, Wang X, Ni J, Dong Z, Li C, and Lu W
- Subjects
- Abnormalities, Multiple genetics, Bone Diseases, Developmental genetics, Child, Dwarfism genetics, Facies, Female, Genetic Association Studies, Heterozygote, Humans, Infant, Newborn, Intellectual Disability genetics, Male, Pedigree, Phenotype, Prognosis, Tooth Abnormalities genetics, Abnormalities, Multiple pathology, Asian People genetics, Bone Diseases, Developmental pathology, Chromosome Deletion, Dwarfism pathology, Intellectual Disability pathology, Loss of Function Mutation, Repressor Proteins genetics, Tooth Abnormalities pathology
- Abstract
KBG syndrome is a rare genetic disease characterized mainly by skeletal abnormalities, distinctive facial features, and intellectual disability. Heterozygous mutations in ANKRD11 gene, or deletion of 16q24.3 that includes ANKRD11 gene are the cause of KBG syndrome. We describe two patients presenting with short stature and partial facial features, whereas no intellectual disability or hearing loss was observed in them. Two ANKRD11 variants, c.4039_4041del (p. Lys1347del) and c.6427C > G (p. Leu2143Val), were identified in this study. Both of them were classified as variants of uncertain significance (VOUS) by ACMG/AMP guidelines and were inherited from their mothers. ANKRD11 could enhance the transactivation of p21 gene, which was identified to participate in chondrogenic differentiation. In this study, we demonstrated that the knockdown of ANKRD11 could reduce the p21-promoter luciferase activities while re-introduction of wild type ANKRD11, but not ANKRD11 variants (p. Lys1347del or p. Leu2143Val), could restore the p21 levels. Thus, our study report two loss-of-function ANKRD11 variants which might provide new insight on pathogenic mechanism that correlates ANKRD11 variants with the short stature phenotype of KBG syndrome., (© 2020 The Authors. American Journal of Medical Genetics Part A published by Wiley Periodicals LLC.)
- Published
- 2021
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