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Lee CYS, Lu T, Seydoux G. Nanos promotes epigenetic reprograming of the germline by down-regulation of the THAP transcription factor LIN-15B. eLife 2017; 6:30201. [PMID: 29111977 PMCID: PMC5734877 DOI: 10.7554/elife.30201] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 11/06/2017] [Indexed: 12/15/2022] Open
Abstract
Nanos RNA-binding proteins are required for germline development in metazoans, but the underlying mechanisms remain poorly understood. We have profiled the transcriptome of primordial germ cells (PGCs) lacking the nanos homologs nos-1 and nos-2 in C. elegans. nos-1nos-2 PGCs fail to silence hundreds of transcripts normally expressed in oocytes. We find that this misregulation is due to both delayed turnover of maternal transcripts and inappropriate transcriptional activation. The latter appears to be an indirect consequence of delayed turnover of the maternally-inherited transcription factor LIN-15B, a synMuvB class transcription factor known to antagonize PRC2 activity. PRC2 is required for chromatin reprogramming in the germline, and the transcriptome of PGCs lacking PRC2 resembles that of nos-1nos-2 PGCs. Loss of maternal LIN-15B restores fertility to nos-1nos-2 mutants. These findings suggest that Nanos promotes germ cell fate by downregulating maternal RNAs and proteins that would otherwise interfere with PRC2-dependent reprogramming of PGC chromatin.
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Affiliation(s)
- Chih-Yung Sean Lee
- Department of Molecular Biology and Genetics, Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, Baltimore, United States
| | - Tu Lu
- Department of Molecular Biology and Genetics, Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, Baltimore, United States
| | - Geraldine Seydoux
- Department of Molecular Biology and Genetics, Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, Baltimore, United States
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Sui W, Zheng C, Yang M, Ou M, Chen J, Dong L, Chen P, Hou X, Liu F, Wei X, Dai Y. Study on 3'-UTR length polymorphism in peripheral blood mononuclear cells of uremia patient. Ren Fail 2015; 38:96-9. [PMID: 26554293 DOI: 10.3109/0886022x.2015.1104989] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVE The objective of this study was to measure the 3'-untranslated region (3'-UTR) polymorphism lengths in peripheral blood mononuclear cells (PBMCs) from uremia patients. METHOD We sequenced the alternative polyadenylation sites in the 3'-UTR of PBMCs from 10 uremic patients and 10 healthy people to detect different gene expression levels between uremia patients and healthy controls. Quantitative reverse transcription polymerase chain reaction was used as validation. RESULT Compared with the healthy control group, 691 genes in uremic patients had significantly different 3'-UTR lengths. Of these genes, 475 genes showed shortened 3'-UTRs, and the 3'-UTRs of 216 genes were lengthened. The verification results matched the original sequencing results. CONCLUSION There were significant differences in 3'-UTR lengths between uremic patients and healthy controls, and analysis of the differential genes may contribute to the understanding of uremia pathogenesis.
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Affiliation(s)
- Weiguo Sui
- a Guangxi Key Laboratory of Metabolic Diseases Research, Nephrology Department of Guilin 181st Hospital , Guilin , Guangxi , China and
| | - Can Zheng
- a Guangxi Key Laboratory of Metabolic Diseases Research, Nephrology Department of Guilin 181st Hospital , Guilin , Guangxi , China and
| | - Ming Yang
- a Guangxi Key Laboratory of Metabolic Diseases Research, Nephrology Department of Guilin 181st Hospital , Guilin , Guangxi , China and
| | - Minglin Ou
- a Guangxi Key Laboratory of Metabolic Diseases Research, Nephrology Department of Guilin 181st Hospital , Guilin , Guangxi , China and
| | - Jiejing Chen
- a Guangxi Key Laboratory of Metabolic Diseases Research, Nephrology Department of Guilin 181st Hospital , Guilin , Guangxi , China and
| | - Li Dong
- a Guangxi Key Laboratory of Metabolic Diseases Research, Nephrology Department of Guilin 181st Hospital , Guilin , Guangxi , China and
| | - Peng Chen
- a Guangxi Key Laboratory of Metabolic Diseases Research, Nephrology Department of Guilin 181st Hospital , Guilin , Guangxi , China and
| | - Xianliang Hou
- a Guangxi Key Laboratory of Metabolic Diseases Research, Nephrology Department of Guilin 181st Hospital , Guilin , Guangxi , China and
| | - Fuhua Liu
- a Guangxi Key Laboratory of Metabolic Diseases Research, Nephrology Department of Guilin 181st Hospital , Guilin , Guangxi , China and
| | - Xiaolian Wei
- a Guangxi Key Laboratory of Metabolic Diseases Research, Nephrology Department of Guilin 181st Hospital , Guilin , Guangxi , China and
| | - Yong Dai
- a Guangxi Key Laboratory of Metabolic Diseases Research, Nephrology Department of Guilin 181st Hospital , Guilin , Guangxi , China and.,b Clinical Medical Research Center, Second Clinical Medical College of Jinan University, Shenzhen People's Hospital , Shenzhen , Guangdong , China
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