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Cheng D, Yuan S, Hu L, Yi D, Luo K, Gong F, Lu C, Lu G, Lin G, Tan YQ. The genetic cause of intellectual deficiency and/or congenital malformations in two parental reciprocal translocation carriers and implications for assisted reproduction. J Assist Reprod Genet 2020; 38:243-250. [PMID: 33094427 DOI: 10.1007/s10815-020-01986-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 10/15/2020] [Indexed: 11/25/2022] Open
Abstract
PURPOSE To elucidate the genetic cause of intellectual deficiency and/or congenital malformations in two parental reciprocal translocation carriers and provide appropriate strategies of assisted reproductive therapy (ART). MATERIALS AND METHODS Two similar couples having a child with global developmental delay/intellectual disability symptoms attended the Reproductive and Genetic Hospital of CITIC-Xiangya (Changsha, China) in 2017 and 2019, respectively, in order to determine the cause(s) of the conditions affecting their child and to seek ART to have a healthy baby. Both of the healthy couples were not of consanguineous marriage, denied exposure to toxicants, and had no adverse life history. This study was approved by the Institutional Ethics Committee of the Reproductive & Genetic Hospital of CITIC-Xiangya, and written informed consent was obtained from the parents. Genetic diagnoses were performed by karyotype analysis, breakpoint mapping analysis of chromosomal translocation(s), single-nucleotide polymorphism (SNP) microarray analysis, and whole-exome sequencing (WES) for the two children and different appropriate reproductive strategies were performed in the two families. RESULTS Karyotype analysis revealed that both patients carried parental reciprocal translocations [46,XY,t(7;16)(p13;q24)pat and 46,XY,t(13;17)(q12.3;p11.2)pat, respectively]. Follow-up breakpoint mapping analysis showed no interruption of associated genes, and SNP microarray analysis identified no significant copy number variations (CNVs) in the two patients. Moreover, WES results revealed that patients 1 and 2 harbored candidate compound heterozygous mutations of MCOLN1 [c.195G>C (p.K65N) and c.1061G>A (p.W354*)] and MCPH1 [c.877A>G (p.S293G) and c.1869_1870delAT (p.C624*)], respectively, that were inherited from their parents and not previously reported. Furthermore, the parents of patient 1 obtained 10 embryos during ART cycle, and an embryo of normal karyotype and non-carrier of observed MCOLN1 mutations according to preimplantation genetic testing for structural rearrangement and monogenic defect was successfully transferred, resulting in the birth of a healthy boy. The parents of patient 2 chose to undergo ART with donor sperm to reduce the risk of recurrence. CONCLUSIONS Systematic genetic diagnosis of two carriers of inherited chromosomal translocations accompanied by clinical phenotypes revealed their cause of disease, which was critical for genetic counseling and further ART for these families.
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Affiliation(s)
- Dehua Cheng
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, 410008, China
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Changsha, 410013, Hunan, People's Republic of China
| | - Shimin Yuan
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, 410008, China
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Changsha, 410013, Hunan, People's Republic of China
| | - Liang Hu
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, 410008, China
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Changsha, 410013, Hunan, People's Republic of China
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, 410078, Hunan, China
- NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, Central South University, Changsha, 410008, China
- National Engineering and Research Center of Human Stem Cells, Changsha, 410013, China
| | - Duo Yi
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, 410008, China
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Changsha, 410013, Hunan, People's Republic of China
| | - Keli Luo
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, 410008, China
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Changsha, 410013, Hunan, People's Republic of China
| | - Fei Gong
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, 410008, China
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Changsha, 410013, Hunan, People's Republic of China
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, 410078, Hunan, China
- NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, Central South University, Changsha, 410008, China
- National Engineering and Research Center of Human Stem Cells, Changsha, 410013, China
| | - Changfu Lu
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, 410008, China
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Changsha, 410013, Hunan, People's Republic of China
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, 410078, Hunan, China
- NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, Central South University, Changsha, 410008, China
- National Engineering and Research Center of Human Stem Cells, Changsha, 410013, China
| | - Guangxiu Lu
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, 410008, China
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Changsha, 410013, Hunan, People's Republic of China
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, 410078, Hunan, China
- NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, Central South University, Changsha, 410008, China
- National Engineering and Research Center of Human Stem Cells, Changsha, 410013, China
| | - Ge Lin
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, 410008, China
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Changsha, 410013, Hunan, People's Republic of China
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, 410078, Hunan, China
- NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, Central South University, Changsha, 410008, China
- National Engineering and Research Center of Human Stem Cells, Changsha, 410013, China
| | - Yue-Qiu Tan
- Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, 410008, China.
- Clinical Research Center for Reproduction and Genetics in Hunan Province, Changsha, 410013, Hunan, People's Republic of China.
- Institute of Reproduction and Stem Cell Engineering, School of Basic Medical Science, Central South University, Changsha, 410078, Hunan, China.
- NHC Key Laboratory of Human Stem Cell and Reproductive Engineering, Central South University, Changsha, 410008, China.
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Majeed NK, Oramas D, Lindgren V, Garzon S, Wiley DE, Enakpene C, Emmadi R. A Case of Osteogenesis Imperfecta Type II With Additional Balanced Translocation t(1;20)(p13;p11.2). Fetal Pediatr Pathol 2019; 38:263-271. [PMID: 30942118 DOI: 10.1080/15513815.2019.1579877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND Osteogenesis imperfect (OI) type II is a genetic disorder of bone characterized by bone fragility, multiple fractures, severe bowing and shortening of long bones, and perinatal death due to respiratory insufficiency. It is mainly caused by mutations in the COL1A1 or COL1A2 genes, inherited in an autosomal dominant manner. CASE REPORT A fetal form of this disorder that included brachydactyly, macrocephaly, frontal bossing, soft calvarium, saddle nose, micrognathia, low set ears, and narrow thoracic cavity is described. A postmortem skeletal survey revealed multiple fractures, unossified skull, and long crumpled bones. The fetal karyotype revealed a balanced translocation t(1;20)(p13;p11.2). DNA sequencing detected a c.3065G > T transversion in exon 42 of the COL1A1 gene, a mutation associated with OI type II. CONCLUSION Although the balanced translocation t(1:20)(p13;p11.2) appears to be incidental in our case, identification of the specific mutation and translocation is important for estimation of genetic risk for another afflicted child.
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Affiliation(s)
- Nasma K Majeed
- a Pathology Department , University of Illinois at Chicago , Chicago , IL , USA
| | - Diana Oramas
- a Pathology Department , University of Illinois at Chicago , Chicago , IL , USA
| | - Valerie Lindgren
- a Pathology Department , University of Illinois at Chicago , Chicago , IL , USA
| | - Steven Garzon
- a Pathology Department , University of Illinois at Chicago , Chicago , IL , USA
| | - Dr Elizabeth Wiley
- a Pathology Department , University of Illinois at Chicago , Chicago , IL , USA
| | | | - Rajyasree Emmadi
- a Pathology Department , University of Illinois at Chicago , Chicago , IL , USA
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Jia M, Shi R, Zhao X, Fu Z, Bai Z, Sun T, Zhao X, Wang W, Xu C, Yan F. Confirmation of the pathogenicity of a mutation p.G337C in the COL1A2 gene associated with osteogenesis imperfecta. Medicine (Baltimore) 2017; 96:e7783. [PMID: 28953610 PMCID: PMC5626253 DOI: 10.1097/md.0000000000007783] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Mutation analysis as the gold standard is particularly important in diagnosis of osteogenesis imperfecta (OI) and it may be preventable upon early diagnosis. In this study, we aimed to analyze the clinical and genetic materials of an OI pedigree as well as to confirm the deleterious property of the mutation.A pedigree with OI was identified. All family members received careful clinical examinations and blood was drawn for genetic analyses. Genes implicated in OI were screened for mutation. The function and structure of the mutant protein were predicted using bioinformatics analysis.The proband, a 9-month fetus, showed abnormal sonographic images. Disproportionately short and triangular face with blue sclera was noticed at birth. She can barely walk and suffered multiple fractures till 2-year old. Her mother appeared small stature, frequent fractures, blue sclera, and deformity of extremities. A heterozygous missense mutation c.1009G>T (p.G337C) in the COL1A2 gene was identified in her mother and her. Bioinformatics analysis showed p.G337 was well-conserved among multiple species and the mutation probably changed the structure and damaged the function of collagen.We suggest that the mutation p.G337C in the COL1A2 gene is pathogenic for OI by affecting the protein structure and the function of collagen.
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Affiliation(s)
| | | | | | | | - Zhijing Bai
- Linyi County Traditional Chinese Medicine Hospital, Dezhou
| | - Tao Sun
- Department of Pain Management
| | | | - Wenbo Wang
- Department of Endocrinology and Metabolism, Shandong Provincial Hospital Affiliated to Shandong University
- Institute of Endocrinology, Shandong Academy of Clinical Medicine
- Shandong Clinical Medical Center of Endocrinology and Metabolism, Jinan, Shandong, China
| | - Chao Xu
- Department of Endocrinology and Metabolism, Shandong Provincial Hospital Affiliated to Shandong University
- Institute of Endocrinology, Shandong Academy of Clinical Medicine
- Shandong Clinical Medical Center of Endocrinology and Metabolism, Jinan, Shandong, China
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