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Zhang X, Wang Y, Yang F, Tang J, Xu X, Yang L, Yang XA, Wu D. Biallelic INTS1 Mutations Cause a Rare Neurodevelopmental Disorder in Two Chinese Siblings. J Mol Neurosci 2019; 70:1-8. [PMID: 31428919 DOI: 10.1007/s12031-019-01393-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Accepted: 07/29/2019] [Indexed: 01/08/2023]
Abstract
This study presents two Chinese siblings with a rare neurodevelopmental disorder (NDD) caused by biallelic INTS1 mutations and investigates the clinical features of this disease by means of in silico analysis. Two siblings, an 11-year-old brother and a 5-year-old sister, visited our hospital due to physical retardation and profound intellectual disability. Whole-exome sequencing (WES) was performed for the girl, and Sanger sequencing was used to validate the identified variants. Phenotype correlation analysis and in silico genetic interaction network analysis were performed to investigate genes that could lead to diseases similar to the rare disease in the patients. Growth retardation, distinct intellectual disability, hypertelorism, mild cataract, uneven teeth, abnormal palmar and plantar creases, and dubious genitalia were noted in the sister. No neurological features related to neuropathy were found. The brother showed features and growth delay similar to his sister. Heterozygous novel variants of c.1645A>G,p.Met549Val and c.5881C>T,p.Gln1961* in INTS1 were considered a candidate etiology. Sanger sequencing demonstrated that the variants were inherited from the grandfather and (maternal) grandmother. Phenotype correlation analysis revealed that CTDP1 mutation-induced congenital cataracts-facial dysmorphism-neuropathy (CCFDN) mostly overlapped with the performance of our patients. In silico analysis of the genetic interaction network showed that INTS1 is highly associated with INTS8 and CTDP1. Our study further validated that biallelic INTS1 mutations could bring about the onset of a novel neurodevelopmental disorder.
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Affiliation(s)
- Xuemin Zhang
- The Children's Neurorehabilitation Center, Pediatric Department, The First Affiliated Hospital of Anhui Medical University, No. 218, Jixi Road, Hefei, 230022, People's Republic of China
| | - Yajian Wang
- Beijing Chigene Translational Medicine Research Center Co., Ltd., Beijing, 100875, People's Republic of China
| | - Fang Yang
- School of Basic Medical Science, Chengde Medical University, Anyuan Road, Chengde, 067000, People's Republic of China
| | - Jiulai Tang
- The Children's Neurorehabilitation Center, Pediatric Department, The First Affiliated Hospital of Anhui Medical University, No. 218, Jixi Road, Hefei, 230022, People's Republic of China
| | - Xiaoyan Xu
- The Children's Neurorehabilitation Center, Pediatric Department, The First Affiliated Hospital of Anhui Medical University, No. 218, Jixi Road, Hefei, 230022, People's Republic of China
| | - Li Yang
- The Children's Neurorehabilitation Center, Pediatric Department, The First Affiliated Hospital of Anhui Medical University, No. 218, Jixi Road, Hefei, 230022, People's Republic of China
| | - Xiu-An Yang
- School of Basic Medical Science, Chengde Medical University, Anyuan Road, Chengde, 067000, People's Republic of China.
| | - De Wu
- The Children's Neurorehabilitation Center, Pediatric Department, The First Affiliated Hospital of Anhui Medical University, No. 218, Jixi Road, Hefei, 230022, People's Republic of China.
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Zhong R, Ge X, Chu T, Teng J, Yan B, Pei J, Jiang L, Zhong H, Han B. Lentivirus-mediated knockdown of CTDP1 inhibits lung cancer cell growth in vitro. J Cancer Res Clin Oncol 2015; 142:723-32. [PMID: 26590573 DOI: 10.1007/s00432-015-2070-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Accepted: 10/29/2015] [Indexed: 12/20/2022]
Abstract
BACKGROUND CTDP1 catalyzes serine phosphorylation and dephosphorylation of the mobile carboxy-terminal domain of the RNA polymerase II. It is conserved among eukarya and is essential for cell growth for its ability in regulation of transcription machinery. However, its function in the process of tumorigenesis is unclear. In the present study, we aim to explore the roles of CTDP1 in the progression of human lung cancer. To our knowledge, this is the first study that reports the functions of CTDP1 in human lung cancer. METHODS We first detected the expression level of CTDP1 in four human lung cancer cell lines: H-125, H1299, LTEP-A-2 and NCI-H446 by semiquantitative RT-PCR. We compared the expression level of CTDP1 in lung cancer tissues and paired adjacent normal tissues on 29 pathologically confirmed patients by real-time quantitative PCR. To further explore the effect of CTDP1 on cell proliferation, a lentiviral vector expressing CTDP1 short hairpin RNA (shRNA) was constructed and infected into human lung cell lines H1299. Interference efficiency was determined by western blot analysis and real-time quantitative PCR. The effects of knockdown of CTDP1 on cell growth, cell cycle and apoptosis and cell colony formation were explored by Cellomics, fluorescence-activated cells sorting and fluorescence microscopy, respectively. RESULTS CTDP1 was expressed in all four human lung cancer cell lines. The expression of CTDP1 in tumor tissues was significantly higher than paired adjacent normal tissues in 29 patients with lung cancer. The expression of CTDP1 was markedly reduced in cells infected with lentivirus delivering shRNA against CTDP1. Inhibition of CTDP1 expression significantly suppressed cell growth, induced G0/G1 phase arrest and repressed cell colony formation. CONCLUSIONS Our results demonstrated that CTDP1 was upregulated in human lung cancer tissues. In addition, it implied that CTDP1 played an important role in cell proliferation and may be a useful therapeutic target in human lung cancer.
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Affiliation(s)
- Runbo Zhong
- Department of Pulmonary Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, 200030, Shanghai, China
| | - Xiaoxiao Ge
- Department of Pulmonary Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, 200030, Shanghai, China
| | - Tianqing Chu
- Department of Pulmonary Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, 200030, Shanghai, China
| | - Jiajun Teng
- Department of Pulmonary Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, 200030, Shanghai, China
| | - Bo Yan
- Department of Pulmonary Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, 200030, Shanghai, China
| | - Jun Pei
- Department of Pulmonary Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, 200030, Shanghai, China
| | - Liyan Jiang
- Department of Pulmonary Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, 200030, Shanghai, China
| | - Hua Zhong
- Department of Pulmonary Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, 200030, Shanghai, China.
| | - Baohui Han
- Department of Pulmonary Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, 200030, Shanghai, China.
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