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Gao Y, Li L, Yuan P, Zhai F, Ren Y, Yan L, Li R, Lian Y, Zhu X, Wu X, Kee K, Wen L, Qiao J, Tang F. 5-Formylcytosine landscapes of human preimplantation embryos at single-cell resolution. PLoS Biol 2020; 18:e3000799. [PMID: 32730243 PMCID: PMC7419013 DOI: 10.1371/journal.pbio.3000799] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 08/11/2020] [Accepted: 07/13/2020] [Indexed: 12/21/2022] Open
Abstract
Epigenetic dynamics, such as DNA methylation and chromatin accessibility, have been extensively explored in human preimplantation embryos. However, the active demethylation process during this crucial period remains largely unexplored. In this study, we use single-cell chemical-labeling-enabled C-to-T conversion sequencing (CLEVER-seq) to quantify the DNA 5-formylcytosine (5fC) levels of human preimplantation embryos. We find that 5-formylcytosine phosphate guanine (5fCpG) exhibits genomic element-specific distribution features and is enriched in L1 and endogenous retrovirus-K (ERVK), the subfamilies of repeat elements long interspersed nuclear elements (LINEs) and long terminal repeats (LTRs), respectively. Unlike in mice, paired pronuclei in the same zygote present variable difference of 5fCpG levels, although the male pronuclei experience stronger global demethylation. The nucleosome-occupied regions show a higher 5fCpG level compared with nucleosome-depleted ones, suggesting the role of 5fC in organizing nucleosome position. Collectively, our work offers a valuable resource for ten-eleven translocation protein family (TET)-dependent active demethylation-related study during human early embryonic development.
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Affiliation(s)
- Yun Gao
- Beijing Advanced Innovation Center for Genomics, Department of Obstetrics and Gynecology, School of Life Sciences, Third Hospital, Peking University, Beijing, China
- Biomedical Pioneering Innovaiton Center, Ministry of Education Key Laboratory of Cell Proliferation and Differentiation, Peking University, Beijing, China
| | - Lin Li
- Guangdong Provincial Key Laboratory of Proteomics, Department of Pathophysiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Peng Yuan
- Beijing Advanced Innovation Center for Genomics, Department of Obstetrics and Gynecology, School of Life Sciences, Third Hospital, Peking University, Beijing, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, China
| | - Fan Zhai
- Beijing Advanced Innovation Center for Genomics, Department of Obstetrics and Gynecology, School of Life Sciences, Third Hospital, Peking University, Beijing, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, China
| | - Yixin Ren
- Beijing Advanced Innovation Center for Genomics, Department of Obstetrics and Gynecology, School of Life Sciences, Third Hospital, Peking University, Beijing, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, China
| | - Liying Yan
- Beijing Advanced Innovation Center for Genomics, Department of Obstetrics and Gynecology, School of Life Sciences, Third Hospital, Peking University, Beijing, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, China
| | - Rong Li
- Beijing Advanced Innovation Center for Genomics, Department of Obstetrics and Gynecology, School of Life Sciences, Third Hospital, Peking University, Beijing, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, China
| | - Ying Lian
- Beijing Advanced Innovation Center for Genomics, Department of Obstetrics and Gynecology, School of Life Sciences, Third Hospital, Peking University, Beijing, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, China
| | - Xiaohui Zhu
- Beijing Advanced Innovation Center for Genomics, Department of Obstetrics and Gynecology, School of Life Sciences, Third Hospital, Peking University, Beijing, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, China
| | - Xinglong Wu
- Beijing Advanced Innovation Center for Genomics, Department of Obstetrics and Gynecology, School of Life Sciences, Third Hospital, Peking University, Beijing, China
- Biomedical Pioneering Innovaiton Center, Ministry of Education Key Laboratory of Cell Proliferation and Differentiation, Peking University, Beijing, China
- Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
| | - Kehkooi Kee
- Center for Stem Cell Biology and Regenerative Medicine, Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing, China
| | - Lu Wen
- Beijing Advanced Innovation Center for Genomics, Department of Obstetrics and Gynecology, School of Life Sciences, Third Hospital, Peking University, Beijing, China
- Biomedical Pioneering Innovaiton Center, Ministry of Education Key Laboratory of Cell Proliferation and Differentiation, Peking University, Beijing, China
| | - Jie Qiao
- Beijing Advanced Innovation Center for Genomics, Department of Obstetrics and Gynecology, School of Life Sciences, Third Hospital, Peking University, Beijing, China
- Key Laboratory of Assisted Reproduction, Ministry of Education, Beijing, China
- Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology, Beijing, China
- Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China
| | - Fuchou Tang
- Beijing Advanced Innovation Center for Genomics, Department of Obstetrics and Gynecology, School of Life Sciences, Third Hospital, Peking University, Beijing, China
- Biomedical Pioneering Innovaiton Center, Ministry of Education Key Laboratory of Cell Proliferation and Differentiation, Peking University, Beijing, China
- Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China
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