A clinical study of Proteus syndrome caused by a mosaic somatic mutation in AKT1 gene
10.3760/cma.j.issn.0578?1426.2019.07.005
- VernacularTitle:AKT1基因嵌合性体细胞突变导致Proteus综合征临床研究
- Author:
Yang XU
1
;
Wenzhen FU
;
Jinwei HE
;
Hua YUE
;
Zhenlin ZHANG
Author Information
1. 上海交通大学附属第六人民医院骨质疏松与骨病专科骨代谢病和遗传研究室200233
- Keywords:
Proteus syndrome;
AKT1 gene;
Mosaic somatic mutation
- From:
Chinese Journal of Internal Medicine
2019;58(7):508-513
- CountryChina
- Language:Chinese
-
Abstract:
Objective Proteus syndrome is a rare disease. The aim of the present study was to analyze the clinical characteristics and gene mutations of Proteus syndrome with a case report and relevant literature review. Methods Clinical data of the patient with Proteus syndrome were collected in detail and biochemical measurements and radiological examinations were conducted. Tissues from phalanges with lesions were obtained to extract DNA, and Sanger sequencing of AKT1 gene was carried on. The pathogenic mutation was further tested in peripheral blood samples of the patient, his parents and 250 healthy volunteers. Orthopaedic surgery was performed on the affected limbs of the patient. Results The patient was presented with progressive overgrowth of the right extremity, scoliosis, cerebral connective tissue nevus and lower extremity venous. A heterozygous mutation of AKT1 gene (c. 49G>A) was identified in DNA extracted from the affected bone tissue of the patient, but not be found in genomic DNA of peripheral blood samples from the patient, his parents and 250 healthy volunteers. Movement function of the affected limb improved significantly after the operations. Conclusions The prominent features of Proteus syndrome are overgrowth of one extremity and cerebral connective tissue nevus. A mosaic somatic mutation of AKT1 gene is one of the pathogenic mutations for Proteus syndrome, and orthopedic surgery may be a good way to improve symptoms of the disease.
