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Zhou D, Zeng J, Zeng X, Li Y, Wu Z, Wan X, Hu P, Su X. A Novel P53/POMC/Gas/SASH1 Autoregulatory Feedback Loop and Pathologic Hyperpigmentation. Mol Med 2019. [DOI: 10.5772/intechopen.81567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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Zhou D, Wei Z, Kuang Z, Luo H, Ma J, Zeng X, Wang K, Liu B, Gong F, Wang J, Lei S, Wang D, Zeng J, Wang T, He Y, Yuan Y, Dai H, He L, Xing Q. A novel P53/POMC/Gαs/SASH1 autoregulatory feedback loop activates mutated SASH1 to cause pathologic hyperpigmentation. J Cell Mol Med 2016; 21:802-815. [PMID: 27885802 PMCID: PMC5345616 DOI: 10.1111/jcmm.13022] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 09/28/2016] [Indexed: 12/22/2022] Open
Abstract
p53-Transcriptional-regulated proteins interact with a large number of other signal transduction pathways in the cell, and a number of positive and negative autoregulatory feedback loops act upon the p53 response. P53 directly controls the POMC/α-MSH productions induced by ultraviolet (UV) and is associated with UV-independent pathological pigmentation. When identifying the causative gene of dyschromatosis universalis hereditaria (DUH), we found three mutations encoding amino acid substitutions in the gene SAM and SH3 domain containing 1 (SASH1), and SASH1 was associated with guanine nucleotide-binding protein subunit-alpha isoforms short (Gαs). However, the pathological gene and pathological mechanism of DUH remain unknown for about 90 years. We demonstrate that SASH1 is physiologically induced by p53 upon UV stimulation and SASH and p53 is reciprocally induced at physiological and pathophysiological conditions. SASH1 is regulated by a novel p53/POMC/α-MSH/Gαs/SASH1 cascade to mediate melanogenesis. A novel p53/POMC/Gαs/SASH1 autoregulatory positive feedback loop is regulated by SASH1 mutations to induce pathological hyperpigmentation phenotype. Our study demonstrates that a novel p53/POMC/Gαs/SASH1 autoregulatory positive feedback loop is regulated by SASH1 mutations to induce pathological hyperpigmentation phenotype.
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Affiliation(s)
- Ding'an Zhou
- Department of Laboratory Medicine, Yongchuan Hospital, Chongqing Medical University, Chongqing, China.,Children's Hospital and Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Zhiyun Wei
- Bio-X Institute, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai, China
| | - Zhongshu Kuang
- Department of Laboratory Medicine, Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Huangchao Luo
- Department of Laboratory Medicine, Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Jiangshu Ma
- Department of Laboratory Medicine, Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Xing Zeng
- Department of Laboratory Medicine, Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Ke Wang
- Department of Laboratory Medicine, Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Beizhong Liu
- Department of Laboratory Medicine, Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Fang Gong
- Department of Laboratory Medicine, Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Jing Wang
- Department of Laboratory Medicine, Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Shanchuan Lei
- Department of Laboratory Medicine, Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Dongsheng Wang
- Department of Laboratory Medicine, The Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Jiawei Zeng
- Dujiangyan People's Hospital, Cheng du, Sichuan, China
| | - Teng Wang
- Children's Hospital and Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Yong He
- Department of Laboratory Medicine, Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Yongqiang Yuan
- Department of Laboratory Medicine, Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Hongying Dai
- Department of Laboratory Medicine, Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Lin He
- Children's Hospital and Institutes of Biomedical Sciences, Fudan University, Shanghai, China.,Bio-X Institute, Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education), Shanghai Jiao Tong University, Shanghai, China
| | - Qinghe Xing
- Children's Hospital and Institutes of Biomedical Sciences, Fudan University, Shanghai, China
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Li M, Yang L, Li C, Jin C, Lai M, Zhang G, Hu Y, Ji J, Yao Z. Mutational spectrum of the ADAR1 gene in dyschromatosis symmetrica hereditaria. Arch Dermatol Res 2010; 302:469-76. [PMID: 20186421 DOI: 10.1007/s00403-010-1039-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2009] [Revised: 01/31/2010] [Accepted: 02/02/2010] [Indexed: 11/24/2022]
Abstract
Dyschromatosis symmetrica hereditaria (DSH) is a rare autosomal dominant cutaneous disorder characterized by a mixture of hyperpigmented and hypopigmented macules of various sizes on the extremities and caused by the mutations of adenosine deaminase acting on RNA1 (ADAR1) gene. We screened 14 unrelated families or sporadic cases for mutation in the full coding sequence of this gene. Eight novel heterozygous mutations of ADAR1 and four known mutations were identified, including four missense mutations (p.R26K, p.Y1192D, p.R916Q, p.R1155W), six frameshift mutations (p.N205fsX217, p.V211fsX217, p.V404fsX417, p.I914fsX927, p.L1053fsX1076, p.L1070fs1092), and two nonsense mutations (p.R474X, p.R1096X). Interestingly, we failed to detect any mutations of ADAR1 in one family. Including our data, there are now 93 different mutations reported in 105 independent patients that we have tabulated. From the review of clinical features in these reports, we found that the same mutation could lead to different phenotypes even in the same family and did not establish a clear correlation between genotypes and phenotypes. Finally this study is useful for functional studies of the protein and to define a diagnostic strategy for mutation screening of the ADAR1 gene.
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Affiliation(s)
- Ming Li
- Department of Dermatology, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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