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Zhang Y, Yu H, Wang D, Lei X, Meng Y, Zhang N, Chen F, Lv L, Pan Q, Qin H, Zhang Z, van Aalten DMF, Yuan K. Protein O-GlcNAcylation homeostasis regulates facultative heterochromatin to fine-tune sog-Dpp signaling during Drosophila early embryogenesis. J Genet Genomics 2023; 50:948-959. [PMID: 37286164 DOI: 10.1016/j.jgg.2023.05.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 04/30/2023] [Accepted: 05/18/2023] [Indexed: 06/09/2023]
Abstract
Protein O-GlcNAcylation is a monosaccharide post-translational modification maintained by two evolutionarily conserved enzymes, O-GlcNAc transferase (OGT) and O-GlcNAcase (OGA). Mutations in human OGT have recently been associated with neurodevelopmental disorders, although the mechanisms linking O-GlcNAc homeostasis to neurodevelopment are not understood. Here, we investigate the effects of perturbing protein O-GlcNAcylation using transgenic Drosophila lines that overexpress a highly active OGA. We reveal that temporal reduction of protein O-GlcNAcylation in early embryos leads to reduced brain size and olfactory learning in adult Drosophila. Downregulation of O-GlcNAcylation induced by the exogenous OGA activity promotes nuclear foci formation of Polycomb-group protein Polyhomeotic and the accumulation of excess K27 trimethylation of histone H3 (H3K27me3) at the mid-blastula transition. These changes interfere with the zygotic expression of several neurodevelopmental genes, particularly shortgastrulation (sog), a component of an evolutionarily conserved sog-Decapentaplegic (Dpp) signaling system required for neuroectoderm specification. Our findings highlight the importance of early embryonic O-GlcNAcylation homeostasis for the fidelity of facultative heterochromatin redeployment and initial cell fate commitment of neuronal lineages, suggesting a possible mechanism underpinning OGT-associated intellectual disability.
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Affiliation(s)
- Yaowen Zhang
- Center for Medical Genetics, School of Life Sciences & Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Haibin Yu
- Center for Medical Genetics, School of Life Sciences & Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Dandan Wang
- Center for Medical Genetics, School of Life Sciences & Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Xiaoyun Lei
- Center for Medical Genetics, School of Life Sciences & Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Yang Meng
- Center for Medical Genetics, School of Life Sciences & Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Na Zhang
- Center for Medical Genetics, School of Life Sciences & Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Fang Chen
- Center for Medical Genetics, School of Life Sciences & Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Lu Lv
- Center for Medical Genetics, School of Life Sciences & Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Qian Pan
- Center for Medical Genetics, School of Life Sciences & Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Hongtao Qin
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, Hunan University, Changsha, Hunan 410082, China
| | - Zhuohua Zhang
- Center for Medical Genetics, School of Life Sciences & Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China
| | - Daan M F van Aalten
- Center for Medical Genetics, School of Life Sciences & Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China; Division of Cell and Developmental Biology, School of Life Sciences, University of Dundee, Dundee DD1 5EH, UK; Department of Molecular Biology and Genetics, University of Aarhus, Aarhus 8000, Denmark.
| | - Kai Yuan
- Center for Medical Genetics, School of Life Sciences & Hunan Key Laboratory of Molecular Precision Medicine, Department of Oncology, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China; National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan 410008, China; The Biobank of Xiangya Hospital, Central South University, Changsha, Hunan 410008, China.
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Zhang Q, Dou W, Pan D, Chen EH, Niu JZ, Smagghe G, Wang JJ. Genome-Wide Analysis of MicroRNAs in Relation to Pupariation in Oriental Fruit Fly. Front Physiol 2019; 10:301. [PMID: 30967796 PMCID: PMC6439999 DOI: 10.3389/fphys.2019.00301] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Accepted: 03/07/2019] [Indexed: 12/15/2022] Open
Abstract
Insect metamorphosis is a complex process involving drastic morphological and physiological changes. microRNAs (miRNAs) are a class of endogenous small non-coding RNAs that play key roles in regulating various biological processes, including metamorphosis, by post-transcriptional repression of mRNAs. The oriental fruit fly, Bactrocera dorsalis, is one of the most destructive insect pests in many Asian countries and the Pacific Islands. The regulatory role of miRNAs in B. dorsalis metamorphosis is unclear. To better understand the molecular regulatory mechanisms of miRNAs in pupariation, Illumina sequencing of the wandering stage (WS), the late WS and the white puparium stage of B. dorsalis were performed. Two hundred forty-nine miRNAs, including 184 known miRNAs and 65 novel miRNAs, were obtained. Among these miRNAs, 19 miRNAs were differentially expressed in pupariation, and eight miRNAs showed relative high expression levels (>50 TPM), of which five differentially expressed miRNAs (DEMs) had target differentially expressed genes (DEGs) predicted by the expected miRNA-mRNA negative regulation pattern using the Illumina HiSeq data. Four sets of DEMs and their predicted target DEGs were confirmed by qPCR. Of the four miRNAs, two miRNAs were down-regulated: miR-981, which may target pdpc, and Bdo-novel-mir-55, which potentially regulates spsX1, psB/C, and chit3. The other two miRNAs were up-regulated: let-7a-3p, which possibly controls lap, and Bdo-novel-mir-24, which may regulate ipc and sp1/2. This study provides a useful resource to elucidate the regulatory role of miRNAs and understand the molecular mechanisms of metamorphosis.
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Affiliation(s)
- Qiang Zhang
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China.,Academy of Agricultural Sciences, Southwest University, Chongqing, China.,International China-Belgium Joint Laboratory on Sustainable Crop Pest Control Between Southwest University in China and Ghent University in Belgium, Chongqing, China.,Department of Plants and Crops, Ghent University, Ghent, Belgium
| | - Wei Dou
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China.,Academy of Agricultural Sciences, Southwest University, Chongqing, China.,International China-Belgium Joint Laboratory on Sustainable Crop Pest Control Between Southwest University in China and Ghent University in Belgium, Chongqing, China.,Department of Plants and Crops, Ghent University, Ghent, Belgium
| | - Deng Pan
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China.,Academy of Agricultural Sciences, Southwest University, Chongqing, China.,International China-Belgium Joint Laboratory on Sustainable Crop Pest Control Between Southwest University in China and Ghent University in Belgium, Chongqing, China.,Department of Plants and Crops, Ghent University, Ghent, Belgium
| | - Er-Hu Chen
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China.,Academy of Agricultural Sciences, Southwest University, Chongqing, China.,International China-Belgium Joint Laboratory on Sustainable Crop Pest Control Between Southwest University in China and Ghent University in Belgium, Chongqing, China.,Department of Plants and Crops, Ghent University, Ghent, Belgium
| | - Jin-Zhi Niu
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China.,Academy of Agricultural Sciences, Southwest University, Chongqing, China.,International China-Belgium Joint Laboratory on Sustainable Crop Pest Control Between Southwest University in China and Ghent University in Belgium, Chongqing, China.,Department of Plants and Crops, Ghent University, Ghent, Belgium
| | - Guy Smagghe
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China.,Academy of Agricultural Sciences, Southwest University, Chongqing, China.,International China-Belgium Joint Laboratory on Sustainable Crop Pest Control Between Southwest University in China and Ghent University in Belgium, Chongqing, China.,Department of Plants and Crops, Ghent University, Ghent, Belgium
| | - Jin-Jun Wang
- Key Laboratory of Entomology and Pest Control Engineering, College of Plant Protection, Southwest University, Chongqing, China.,Academy of Agricultural Sciences, Southwest University, Chongqing, China.,International China-Belgium Joint Laboratory on Sustainable Crop Pest Control Between Southwest University in China and Ghent University in Belgium, Chongqing, China.,Department of Plants and Crops, Ghent University, Ghent, Belgium
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Abstract
ASCIZ/ATMIN is not required for ATM activation by replication stress in MEFs. ATM activation is normal in human ASCIZ/ATMIN KO cells. ASCIZ/ATMIN is dispensable for aphidicolin-induced 53BP1 focus formation.
The ATM kinase plays critical roles in the response to DNA double-strand breaks, and can also be activated by prolonged DNA replication blocks. It has recently been proposed that replication stress-dependent ATM activation is mediated by ASCIZ (also known as ATMIN, ZNF822), an essential developmental transcription factor. In contrast, we show here that ATM activation, and phosphorylation of its substrates KAP1, p53 and H2AX in response to the replication blocking agent aphidicolin was unaffected in both immortalized and primary ASCIZ/ATMIN-deficient murine embryonic fibroblasts compared to control cells. Similar results were also obtained in human ASCIZ/ATMIN-deleted lymphoma cells. The results demonstrate that ASCIZ/ATMIN is dispensable for ATM activation, and contradict the previously reported dependence of ATM on ASCIZ/ATMIN.
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