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Liang H, Hou Y, Pang Q, Jiang Y, Wang O, Li M, Xing X, Zhu H, Xia W. Clinical, Biochemical, Radiological, Genetic and Therapeutic Analysis of Patients with COMP Gene Variants. Calcif Tissue Int 2022; 110:313-323. [PMID: 34709441 DOI: 10.1007/s00223-021-00920-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 09/29/2021] [Indexed: 11/30/2022]
Abstract
Pseudoachondroplasia (PSACH) and multiple epiphyseal dysplasia type 1 (MED1) are two rare skeletal disorders caused by cartilage oligomeric matrix protein (COMP) variants. This study aims to analyze the genotype and phenotype of patients with COMP variants. Clinical information for 14 probands was collected; DNA was extracted from blood for COMP variant detection. Clinical manifestations and radiology scoring systems were established to evaluate the severity of each patient's condition. Serum COMP levels in PSACH patients and healthy subjects were measured. Thirty-nine patients were included, along with 12 PSACH probands and two MED1 probands. Disproportionate short stature, waddling gait, early-onset osteoarthritis and skeletal deformities were the most common features. The height Z-score of PSACH patients correlated negatively with age at evaluation (r = - 0.603, p = 0.01) and the clinical manifestation score (r = - 0.556, p = 0.039). Over 50% of the PSACH patients were overweight/obese. The median serum COMP level in PSACH patients was 16.75 ng/ml, which was significantly lower than that in healthy controls (98.53 ng/ml; p < 0.001). The condition of MED1 patients was better than that of PSACH patients. Four novel variants of COMP were detected: c.874T>C, c.1123_1134del, c.1531G>A, and c.1576G>T. Height Z-scores and serum COMP levels were significantly lower in patients carrying mutations located in calmodulin-like domains 6, 7, and 8. As the two phenotypes overlap to different degrees, PSACH and MED1 are suggested to combine to produce "spondyloepiphyseal dysplasia, COMP type". Clinical manifestations and radiology scoring systems, serum COMP levels and genotype are important for evaluating patient condition severity.
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Affiliation(s)
- Hanting Liang
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100730, China
| | - Yanfang Hou
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100730, China
| | - Qianqian Pang
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100730, China
| | - Yan Jiang
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100730, China
| | - Ou Wang
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100730, China
| | - Mei Li
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100730, China
| | - Xiaoping Xing
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100730, China
| | - Huijuan Zhu
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100730, China
| | - Weibo Xia
- Key Laboratory of Endocrinology of National Health Commission, Department of Endocrinology, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, 100730, China.
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Ma M, Liang X, Wang X, Zhang L, Cheng S, Guo X, Zhang F, Wen Y. The molecular mechanism study of COMP involved in the articular cartilage damage of Kashin-Beck disease. Bone Joint Res 2020; 9:578-586. [PMID: 33005397 PMCID: PMC7502256 DOI: 10.1302/2046-3758.99.bjr-2019-0247.r1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Aims Kashin-Beck disease (KBD) is a kind of chronic osteochondropathy, thought to be caused by environmental risk factors such as T-2 toxin. However, the exact aetiology of KBD remains unclear. In this study, we explored the functional relevance and biological mechanism of cartilage oligosaccharide matrix protein (COMP) in the articular cartilage damage of KBD. Methods The articular cartilage specimens were collected from five KBD patients and five control subjects for cell culture. The messenger RNA (mRNA) and protein expression levels were detected by quantitative reverse transcription PCR (qRT-PCR) and western blot. The survival rate of C28/I2 chondrocyte cell line was detected by MTT assay after T-2 toxin intervention. The cell viability and mRNA expression levels of apoptosis related genes between COMP-overexpression groups and control groups were examined after cell transfection. Results The mRNA and protein expression levels of COMP were significantly lower in KBD chondrocytes than control chondrocytes. After the T-2 toxin intervention, the COMP mRNA expression of C28/I2 chondrocyte reduced and the protein level of COMP in three intervention groups was significantly lower than in the control group. MTT assay showed that the survival rate of COMP overexpression KBD chondrocytes were notably higher than in the blank control group. The mRNA expression levels of Survivin, SOX9, Caspase-3, and type II collagen were also significantly different among COMP overexpression, negative control, and blank control groups. Conclusion Our study results confirmed the functional relevance of COMP with KBD. COMP may play an important role in the excessive chondrocytes apoptosis of KBD patients.Cite this article: Bone Joint Res 2020;9(9):578-586.
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Affiliation(s)
- Mei Ma
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, China
| | - Xiao Liang
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, China.,National Local Joint Engineering Research Center of Biodiagnostics and Biotherapy, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Xi Wang
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, China
| | - Lu Zhang
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, China
| | - Shiqiang Cheng
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, China
| | - Xiong Guo
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, China
| | - Feng Zhang
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, China
| | - Yan Wen
- School of Public Health, Health Science Center, Xi'an Jiaotong University, Xi'an, China
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Abstract
PURPOSE In 1959, Maroteaux and Lamy initially designated pseudoachondroplasia as a distinct dysplasia different from achondroplasia the most common form of skeletal dysplasia. Pseudoachondroplasia is caused by a mutation in the collagen oligomeric matrix protein gene (COMP) gene on chromosome 19p13.1-p12 encoding the COMP. The COMP gene mutations result in rendering the articular and growth plate cartilages incapable of withstanding routine biomechanical loads with resultant deformity of the joints. The purpose of the study was to characterize the typical orthopaedic findings in pseudoachondroplasia. METHODS The charts and radiographs of 141 patients with pseudoachondroplasia were analyzed. This cohort, to our knowledge, represents the largest group of patients describing the typical orthopaedic manifestations of pseudoachondroplasia. RESULTS Patients with pseudoachondroplasia have normal craniofacial appearance with normal intelligence. Short stature is not present at birth and generally appears by two to four years of age. The condition is a form of spondyloepiphyseal dysplasia and the long bones are characterized by dysplastic changes in the epiphysis, metaphysis and vertebral bodies. Radiographically the long bones have altered the appearance and structure of the epiphyses with small irregularly formed or fragmented epiphyses or flattening. The metaphyseal regions of the long bones show flaring, widening or 'trumpeting'. The cervical (89%) and thoracic and lumbar vertebrae show either platyspondyly, ovoid, 'cod-fish' deformity or anterior 'beaking'. Kyphosis (28%), scoliosis (58%) and lumbar lordosis (100%) are commonly seen. The femoral head and acetabulum are severely dysplastic (100%). The knees show either genu valgum (22%), genu varum (56%) or 'windswept' deformity (22%). CONCLUSION Most commonly these distortions of the appendicular and the axial skeleton lead to premature arthritis particularly of the hips and often the knees not uncommonly in the 20- to 30-year-old age group. LEVEL OF EVIDENCE III.
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Affiliation(s)
- D. S. Weiner
- Department of Orthopaedics, Akron Children’s Hospital, Akron, Ohio, USA,Correspondence should be sent to D. S. Weiner, Department of Orthopaedics, Akron Children’s Hospital, 300 Locust Street, Ste. 250, Akron, OH 44302-1821, USA.
| | - J. Guirguis
- Department of Orthopaedics, Akron Children’s Hospital, Akron, Ohio, USA
| | - M. Makowski
- Department of Orthopaedics, Cleveland Clinic/Akron General, Akron, Ohio, USA
| | - S. Testa
- Rebecca D. Considine Research Institute/Akron Children’s Hospital, Akron, Ohio, USA
| | - L. Shauver
- Rebecca D. Considine Research Institute/Akron Children’s Hospital, Akron, Ohio, USA
| | - D. Morgan
- Rebecca D. Considine Research Institute/Akron Children’s Hospital, Akron, Ohio, USA
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Ansari H, Mohammadi-Asl J, Hajjari M, Tahmasebi-Birgani M, Kollaee A, Jassemi-Zergani F, Vakili-Hajiagha A. Exome sequencing revealed a p.G299R mutation in the COMP gene in an Iranian family suffering from pseudoachondroplasia. J Gene Med 2019; 21:e3103. [PMID: 31177591 DOI: 10.1002/jgm.3103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 05/18/2019] [Accepted: 05/31/2019] [Indexed: 11/07/2022] Open
Abstract
BACKGROUND Short-stature (SS) is multifactorial pathologic condition that originates from either genetic or environmental factors. The diagnosis is based on family history, clinical findings, radiological examination and genetic analysis. A variety of genes have been reported for SS, among which FGFR-3 was the main gene in achondroplasia and hypochondroplasia. In other forms of SS, the gene involved varies from one patient to another. Whole exome sequencing (WES) and comparative genomic hybridization (CGH) have recently introduced a growing body of genes annually. The present study performed a WES analysis on an Iranian family suffering from an inherited form of SS aiming to diagnose the causative gene. The father and all of his four sons were diagnosed as SS. METHODS The blood samples were collected from the proband and his available family members. Genomic DNA was extracted using salting-out method. The DNA of the proband was analyzed using WES and confirmed through polymerase chain reaction (PCR)-sequencing. The WES-extracted variant was evaluated in silico using software aiming to determine whether this nucleotide change is pathogenic. The presence of the variant was traced in other affected family members using PCR-sequencing. RESULTS Following segregation analysis, variant c.896 G>A of the COMP gene was found in all of the affected individuals in a heterozygous form. This variant resulted in substitution of glycine 299 with arginine and was previously predicted as pathogenic in the Human Gene Mutation Database dataset, although it represents the first report in Iran. CONCLUSIONS The findings of the present study suggest consideration of the c.896 G>A variant of the COMP gene with respect to the genetic counseling of inherited skeletal dysplasia in Iran.
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Affiliation(s)
- Hossein Ansari
- Department of Medical Genetics, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Javad Mohammadi-Asl
- Department of Medical Genetics, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Noor Genetics Laboratory, Ahvaz, Iran
| | - Mohammadreza Hajjari
- Department of Genetics, Faculty of Sciences, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Maryam Tahmasebi-Birgani
- Department of Medical Genetics, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | | | - Farzad Jassemi-Zergani
- Research Institute for Infectious Disease of Digestive System, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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