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Siberski-Cooper CJ, Mayes MS, Gorden PJ, Kramer L, Bhatia V, Koltes JE. The genetic architecture of complete blood counts in lactating Holstein dairy cows. Front Genet 2024; 15:1360295. [PMID: 38601075 PMCID: PMC11004310 DOI: 10.3389/fgene.2024.1360295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Accepted: 03/04/2024] [Indexed: 04/12/2024] Open
Abstract
Complete blood counts (CBCs) measure the abundance of individual immune cells, red blood cells, and related measures such as platelets in circulating blood. These measures can indicate the health status of an animal; thus, baseline circulating levels in a healthy animal may be related to the productive life, resilience, and production efficiency of cattle. The objective of this study is to determine the heritability of CBC traits and identify genomic regions that are associated with CBC measurements in lactating Holstein dairy cattle. The heritability of CBCs was estimated using a Bayes C0 model. The study population consisted of 388 cows with genotypes at roughly 75,000 markers and 16 different CBC phenotypes taken at one to three time points (n = 33, 131, and 224 for 1, 2, and 3 time points, respectively). Heritabilities ranged from 0.00 ± 0.00 (red cell distribution width) to 0.68 ± 0.06 (lymphocytes). A total of 96 different 1-Mb windows were identified that explained more than 1% of the genetic variance for at least one CBC trait, with 10 windows explaining more than 1% of the genetic variance for two or more traits. Multiple genes in the identified regions have functions related to immune response, cell differentiation, anemia, and disease. Positional candidate genes include RAD52 motif-containing protein 1 (RDM1), which is correlated with the degree of immune infiltration of immune cells, and C-X-C motif chemokine ligand 12 (CXCL12), which is critically involved in neutrophil bone marrow storage and release regulation and enhances neutrophil migration. Since animal health directly impacts feed intake, understanding the genetics of CBCs may be useful in identifying more disease-resilient and feed-efficient dairy cattle. Identification of genes responsible for variation in CBCs will also help identify the variability in how dairy cattle defend against illness and injury.
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Affiliation(s)
| | - Mary S. Mayes
- Department of Animal Science, Iowa State University, Ames, IA, United States
| | - Patrick J. Gorden
- Veterinary Diagnostic and Production Animal Medicine, Iowa State University, Ames, IA, United States
| | - Luke Kramer
- Department of Animal Science, Iowa State University, Ames, IA, United States
| | - Vishesh Bhatia
- Department of Animal Science, Iowa State University, Ames, IA, United States
| | - James E. Koltes
- Department of Animal Science, Iowa State University, Ames, IA, United States
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2
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Barakat S, Ezen E, Devecioğlu İ, Gezen M, Piepoli S, Erman B. Dimerization choice and alternative functions of ZBTB transcription factors. FEBS J 2024; 291:237-255. [PMID: 37450366 DOI: 10.1111/febs.16905] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 06/09/2023] [Accepted: 07/12/2023] [Indexed: 07/18/2023]
Abstract
Zinc Finger DNA-binding domain-containing proteins are the most populous family among eukaryotic transcription factors. Among these, members of the BTB domain-containing ZBTB sub-family are mostly known for their transcriptional repressive functions. In this Viewpoint article, we explore molecular mechanisms that potentially diversify the function of ZBTB proteins based on their homo and heterodimerization, alternative splicing and post-translational modifications. We describe how the BTB domain is as much a scaffold for the assembly of co-repressors, as a domain that regulates protein stability. We highlight another mechanism that regulates ZBTB protein stability: phosphorylation in the zinc finger domain. We explore the non-transcriptional, structural roles of ZBTB proteins and highlight novel findings that describe the ability of ZBTB proteins to associate with poly adenosine ribose in the nucleus during the DNA damage response. Herein, we discuss the contribution of BTB domain scaffolds to the formation of transcriptional repressive complexes, to chromosome compartmentalization and their non-transcriptional, purely structural functions in the nucleus.
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Affiliation(s)
- Sarah Barakat
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Boğaziçi University, Istanbul, Turkey
| | - Ege Ezen
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Boğaziçi University, Istanbul, Turkey
| | - İzem Devecioğlu
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Boğaziçi University, Istanbul, Turkey
| | - Melike Gezen
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Boğaziçi University, Istanbul, Turkey
| | - Sofia Piepoli
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Boğaziçi University, Istanbul, Turkey
| | - Batu Erman
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Boğaziçi University, Istanbul, Turkey
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3
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Cao H, Naik SH, Amann-Zalcenstein D, Hickey P, Salim A, Cao B, Nilsson SK, Keightley MC, Lieschke GJ. Late fetal hematopoietic failure results from ZBTB11 deficiency despite abundant HSC specification. Blood Adv 2023; 7:6506-6519. [PMID: 37567157 PMCID: PMC10632610 DOI: 10.1182/bloodadvances.2022009580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 07/17/2023] [Accepted: 07/18/2023] [Indexed: 08/13/2023] Open
Abstract
Hematopoiesis produces diverse blood cell lineages to meet the basal needs and sudden demands of injury or infection. A rapid response to such challenges requires the expansion of specific lineages and a prompt return to balanced steady-state levels, necessitating tightly coordinated regulation. Previously we identified a requirement for the zinc finger and broad complex, tramtrak, bric-a-brac domain-containing 11 (ZBTB11) transcription factor in definitive hematopoiesis using a forward genetic screen for zebrafish myeloid mutants. To understand its relevance to mammalian systems, we extended these studies to mice. When Zbtb11 was deleted in the hematopoietic compartment, embryos died at embryonic day (E) 18.5 with hematopoietic failure. Zbtb11 hematopoietic knockout (Zbtb11hKO) hematopoietic stem cells (HSCs) were overabundantly specified from E14.5 to E17.5 compared with those in controls. Overspecification was accompanied by loss of stemness, inability to differentiate into committed progenitors and mature lineages in the fetal liver, failure to seed fetal bone marrow, and total hematopoietic failure. The Zbtb11hKO HSCs did not proliferate in vitro and were constrained in cell cycle progression, demonstrating the cell-intrinsic role of Zbtb11 in proliferation and cell cycle regulation in mammalian HSCs. Single-cell RNA sequencing analysis identified that Zbtb11-deficient HSCs were underrepresented in an erythroid-primed subpopulation and showed downregulation of oxidative phosphorylation pathways and dysregulation of genes associated with the hematopoietic niche. We identified a cell-intrinsic requirement for Zbtb11-mediated gene regulatory networks in sustaining a pool of maturation-capable HSCs and progenitor cells.
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Affiliation(s)
- Huimin Cao
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC, Australia
- Biomedical Manufacturing, Commonwealth Scientific and Industrial Research Organisation, Clayton, VIC, Australia
| | - Shalin H. Naik
- Department of Immunology, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia
- Single Cell Open Research Endeavour, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia
- Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - Daniela Amann-Zalcenstein
- Single Cell Open Research Endeavour, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia
- Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
- Advanced Genomics Facility, Advanced Technology and Biology Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia
| | - Peter Hickey
- Single Cell Open Research Endeavour, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia
- Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
- Advanced Genomics Facility, Advanced Technology and Biology Division, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia
| | - Agus Salim
- Mathematics and Statistics, La Trobe University, Bundoora, VIC, Australia
- Melbourne School of Population and Global Health, School of Mathematics and Statistics, University of Melbourne, Parkville, VIC, Australia
| | - Benjamin Cao
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC, Australia
- Biomedical Manufacturing, Commonwealth Scientific and Industrial Research Organisation, Clayton, VIC, Australia
| | - Susan K. Nilsson
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC, Australia
- Biomedical Manufacturing, Commonwealth Scientific and Industrial Research Organisation, Clayton, VIC, Australia
| | - M. Cristina Keightley
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC, Australia
- La Trobe Institute for Molecular Science, La Trobe University, Bundoora, VIC, Australia
- Rural Clinical Sciences, La Trobe Rural Health School, Bendigo, VIC, Australia
| | - Graham J. Lieschke
- Australian Regenerative Medicine Institute, Monash University, Clayton, VIC, Australia
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4
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Piepoli S, Barakat S, Nogay L, Şimşek B, Akkose U, Taskiran H, Tolay N, Gezen M, Yeşilada CY, Tuncay M, Adebali O, Atilgan C, Erman B. Sibling rivalry among the ZBTB transcription factor family: homodimers versus heterodimers. Life Sci Alliance 2022; 5:5/11/e202201474. [PMID: 36096675 PMCID: PMC9468604 DOI: 10.26508/lsa.202201474] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 08/26/2022] [Accepted: 08/29/2022] [Indexed: 11/24/2022] Open
Abstract
BTB domains potentially can form homo- or heterodimers. The study examines the dimerization choice of several BTB domains and finds only one heterodimer, while all tested pairs can homodimerize. The BTB domain is an oligomerization domain found in over 300 proteins encoded in the human genome. In the family of BTB domain and zinc finger–containing (ZBTB) transcription factors, 49 members share the same protein architecture. The N-terminal BTB domain is structurally conserved among the family members and serves as the dimerization site, whereas the C-terminal zinc finger motifs mediate DNA binding. The available BTB domain structures from this family reveal a natural inclination for homodimerization. In this study, we investigated the potential for heterodimer formation in the cellular environment. We selected five BTB homodimers and four heterodimer structures. We performed cell-based binding assays with fluorescent protein–BTB domain fusions to assess dimer formation. We tested the binding of several BTB pairs, and we were able to confirm the heterodimeric physical interaction between the BTB domains of PATZ1 and PATZ2, previously reported only in an interactome mapping experiment. We also found this pair to be co-expressed in several immune system cell types. Finally, we used the available structures of BTB domain dimers and newly constructed models in extended molecular dynamics simulations (500 ns) to understand the energetic determinants of homo- and heterodimer formation. We conclude that heterodimer formation, although frequently described as less preferred than homodimers, is a possible mechanism to increase the combinatorial specificity of this transcription factor family.
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Affiliation(s)
- Sofia Piepoli
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey.,Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Bogazici University, Istanbul, Turkey
| | - Sarah Barakat
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey
| | - Liyne Nogay
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey
| | - Büşra Şimşek
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey.,Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Bogazici University, Istanbul, Turkey
| | - Umit Akkose
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey
| | - Hakan Taskiran
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey
| | - Nazife Tolay
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey
| | - Melike Gezen
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey
| | - Canberk Yarkın Yeşilada
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Bogazici University, Istanbul, Turkey
| | - Mustafa Tuncay
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Bogazici University, Istanbul, Turkey
| | - Ogün Adebali
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey
| | - Canan Atilgan
- Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul, Turkey
| | - Batu Erman
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, Bogazici University, Istanbul, Turkey
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5
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Yu S, Yuan G, Hu F, Li Y, Chen Z, Zhang R, Li P, Chen Z, Song J. Contribution of ZBTB20 Polymorphisms to Esophageal Cancer Risk Among the Chinese Han Population. Pharmgenomics Pers Med 2022; 15:827-842. [PMID: 36172401 PMCID: PMC9512063 DOI: 10.2147/pgpm.s370963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Accepted: 09/09/2022] [Indexed: 11/23/2022] Open
Abstract
Background ZBTB20 was overexpressed in esophageal cancer (EC). The study aimed to identify genotypes of ZBTB20 polymorphisms and their correlation with EC occurrence in a Chinese Han population. Methods Four single nucleotide polymorphisms (SNPs) in ZBTB20 were randomly selected for genotyping through Agena MassARRAY system among 525 EC patients and 522 healthy controls. Multiple genetic models were applied to assess the association of ZBTB20 polymorphisms with EC susceptibility by calculating odds ratios (ORs) with 95% confidence intervals (CIs). Results Rs10934270 was associated with lower EC susceptibility (OR = 0.64, p = 0.004) with statistical power >90% in overall analysis. Specifically, the correlation of rs10934270 with EC susceptibility was found in subgroups including patients with esophageal squamous cell carcinoma (ESCC), males, subjects aged ≤65 years, subjects with BMI ≤ 24 kg/m2, and smokers. Rs9841504 might be a risk-increasing factor for ESCC. Moreover, rs9288999 in subjects aged ≤65 years and rs73230612 in females were related to lower EC risk. Conclusion Our research is the first to report that ZBTB20 rs10934270 is associated with reduced EC susceptibility in the Chinese Han population. These data provide a scientific basis for understanding the influence of the ZBTB20 gene on EC occurrence.
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Affiliation(s)
- Shuyong Yu
- Department of Gastrointestinal Surgery, Hainan Cancer Hospital, Haikou, 570100, People’s Republic of China
| | - Guihong Yuan
- Department of Gastroenterology, Hainan Cancer Hospital, Haikou, 570100, People’s Republic of China
| | - Feixiang Hu
- Department of Gastrointestinal Surgery, Hainan Cancer Hospital, Haikou, 570100, People’s Republic of China
| | - Yongyu Li
- Department of Gastroenterology, Hainan Cancer Hospital, Haikou, 570100, People’s Republic of China
| | - Zhuang Chen
- Department of Gastroenterology, Hainan Cancer Hospital, Haikou, 570100, People’s Republic of China
| | - Ronglin Zhang
- Digestive Endoscopy Center, Hainan Cancer Hospital, Haikou, 570100, People’s Republic of China
| | - Ping Li
- Digestive Endoscopy Center, Hainan Cancer Hospital, Haikou, 570100, People’s Republic of China
| | - Zhaowei Chen
- Department of Gastroenterology, Hainan Cancer Hospital, Haikou, 570100, People’s Republic of China
| | - Jian Song
- Department of Gastroenterology, Southern University of Science and Technology Hospital, Shenzhen, 518000, People’s Republic of China
- Correspondence: Jian Song, #6019, Liuxian Avenue, Nanshan District, Shenzhen, Guangdong, 518000, People’s Republic of China, Email
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6
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Chen L, Liu Z, Tang H, Zhou Z, Chen J, Ma Z, Deng M, Li X, Wu Y, Zheng L, Zhou L, Zheng X, Liu Z. Knockdown of ZBTB11 impedes R‐loop elimination and increases the sensitivity to cisplatin by inhibiting DDX1 transcription in bladder cancer. Cell Prolif 2022; 55:e13325. [DOI: 10.1111/cpr.13325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 06/28/2022] [Accepted: 07/26/2022] [Indexed: 11/26/2022] Open
Affiliation(s)
- Lei Chen
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine Sun Yat‐sen University Cancer Center Guangzhou China
- Department of Urology Sun Yat‐sen University Cancer Center Guangzhou China
| | - Zefu Liu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine Sun Yat‐sen University Cancer Center Guangzhou China
- Department of Urology Sun Yat‐sen University Cancer Center Guangzhou China
| | - Huancheng Tang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine Sun Yat‐sen University Cancer Center Guangzhou China
- Department of Urology Sun Yat‐sen University Cancer Center Guangzhou China
| | - Zhaohui Zhou
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine Sun Yat‐sen University Cancer Center Guangzhou China
- Department of Urology Sun Yat‐sen University Cancer Center Guangzhou China
| | - Jiawei Chen
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine Sun Yat‐sen University Cancer Center Guangzhou China
- Department of Urology Sun Yat‐sen University Cancer Center Guangzhou China
| | - Zikun Ma
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine Sun Yat‐sen University Cancer Center Guangzhou China
- Department of Urology Sun Yat‐sen University Cancer Center Guangzhou China
| | - Minhua Deng
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine Sun Yat‐sen University Cancer Center Guangzhou China
- Department of Urology Sun Yat‐sen University Cancer Center Guangzhou China
| | - Xiangdong Li
- Department of Urology Sun Yat‐sen University Cancer Center Guangzhou China
| | - Yuanzhong Wu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine Sun Yat‐sen University Cancer Center Guangzhou China
| | - Lisi Zheng
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine Sun Yat‐sen University Cancer Center Guangzhou China
| | - Liwen Zhou
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine Sun Yat‐sen University Cancer Center Guangzhou China
| | - Xianchong Zheng
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine Sun Yat‐sen University Cancer Center Guangzhou China
- Department of Urology Sun Yat‐sen University Cancer Center Guangzhou China
| | - Zhuowei Liu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine Sun Yat‐sen University Cancer Center Guangzhou China
- Department of Urology Sun Yat‐sen University Cancer Center Guangzhou China
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7
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Lu L, Shi M, Qiu J, Shi Z, Wang C, Fu Y, Lin C, Zhang L, Tao J, Liu C, Wei F, Liang S, Zheng J. ZBTB20 regulates cardiac allograft rejection through NFкB-mediated inflammation in mouse heart transplantation. Transpl Immunol 2022; 74:101676. [PMID: 35872083 DOI: 10.1016/j.trim.2022.101676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 07/18/2022] [Accepted: 07/19/2022] [Indexed: 11/24/2022]
Abstract
Allograft rejection is a major obstacle for the long-term survival of heart transplantation (Htx) patients. The cardiac allograft rejection requires the activation of macrophages and effector T cells. In this study, we explored the role of zinc-finger and BTB domain containing protein 20 (ZBTB20) in the regulation of heart allograft rejection. Flow cytometry analysis of the spleen cells from mice undergoing an acute cardiac rejection revealed that the ZBTB20 protein expression was upregulated in both T and B cells(n = 4,P < 0.01). In addition, ZBTB20 gene knockdown significantly prolonged the survival of heart allografts in mice(n = 4,P < 0.01). Lack of ZBTB20 increased the expression of Foxp3 and limited the response of T helper 1 (Th1) cells(n = 4,P < 0.01). The ZBTB20-related regulation occurred through the activation of the NFкB pathway. In conclusion, our data suggest that ZBTB20 is involved in the regulation of T cells involved in acute heart allograft rejection. Hence, downregulation of ZBTB20 expression may inhibit T cells to prolong heart transplant survival.
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Affiliation(s)
- Liuyi Lu
- Department of Cardiovascular Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; State Key Laboratory of Quality Research in Chinese Medicine and School of Pharmacy, Macau University of Science and Technology, Macao SAR, China
| | - Maomao Shi
- Department of Cardiovascular Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Junxiong Qiu
- Department of Cardiovascular Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Zhanyue Shi
- Department of Cardiovascular Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Chao Wang
- Department of Cardiovascular Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Department of Thoracic and Cardiac Surgery, The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen 518033, China
| | - Yuan Fu
- Department of Cardiovascular Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Canxiang Lin
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Department of Plastic Surgery, The First Affiliated Hospital of Jinan University, Key Laboratory of Regenerative Medicine, Ministry of Education, Guangzhou 510630, China
| | - Lisui Zhang
- Department of Cardiovascular Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Jun Tao
- Department of Cardiovascular Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Chang Liu
- Department of Cardiovascular Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Feng Wei
- Department of Cardiovascular Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China
| | - Shi Liang
- Department of Cardiovascular Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China.
| | - Junmeng Zheng
- Department of Cardiovascular Surgery, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, China; Department of Surgery, Kiang Wu Hospital, Macao SAR, China.
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8
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Krzyzanowska AK, Haynes Ii RAH, Kovalovsky D, Lin HC, Osorio L, Edelblum KL, Corcoran LM, Rabson AB, Denzin LK, Sant'Angelo DB. Zbtb20 identifies and controls a thymus-derived population of regulatory T cells that play a role in intestinal homeostasis. Sci Immunol 2022; 7:eabf3717. [PMID: 35522722 DOI: 10.1126/sciimmunol.abf3717] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The expression of BTB-ZF transcription factors such as ThPOK in CD4+ T cells, Bcl6 in T follicular helper cells, and PLZF in natural killer T cells defines the fundamental nature and characteristics of these cells. Screening for lineage-defining BTB-ZF genes led to the discovery of a subset of T cells that expressed Zbtb20. About half of Zbtb20+ T cells expressed FoxP3, the lineage-defining transcription factor for regulatory T cells (Tregs). Zbtb20+ Tregs were phenotypically and genetically distinct from the larger conventional Treg population. Zbtb20+ Tregs constitutively expressed mRNA for interleukin-10 and produced high levels of the cytokine upon primary activation. Zbtb20+ Tregs were enriched in the intestine and specifically expanded when inflammation was induced by the use of dextran sodium sulfate. Conditional deletion of Zbtb20 in T cells resulted in a loss of intestinal epithelial barrier integrity. Consequently, knockout (KO) mice were acutely sensitive to colitis and often died because of the disease. Adoptive transfer of Zbtb20+ Tregs protected the Zbtb20 conditional KO mice from severe colitis and death, whereas non-Zbtb20 Tregs did not. Zbtb20 was detected in CD24hi double-positive and CD62Llo CD4 single-positive thymocytes, suggesting that expression of the transcription factor and the phenotype of these cells were induced during thymic development. However, Zbtb20 expression was not induced in "conventional" Tregs by activation in vitro or in vivo. Thus, Zbtb20 expression identified and controlled the function of a distinct subset of Tregs that are involved in intestinal homeostasis.
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Affiliation(s)
- Agata K Krzyzanowska
- Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 08901, USA.,Rutgers Graduate School of Biomedical Sciences, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 08901, USA
| | - Rashade A H Haynes Ii
- Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 08901, USA
| | - Damian Kovalovsky
- Center for Cancer Research, National Cancer Institute National Institutes of Health, Bethesda, MD 20892, USA
| | - Hsin-Ching Lin
- Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 08901, USA
| | - Louis Osorio
- Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 08901, USA
| | - Karen L Edelblum
- Department of Pathology and Laboratory Medicine Center for Immunity and Inflammation, Rutgers New Jersey Medical School, Newark, NJ 07103, USA
| | - Lynn M Corcoran
- The Walter and Eliza Hall Institute of Medical Research Immunology Division, Department of Medical Biology, The University of Melbourne, Parkville, Victoria 3052, Australia
| | - Arnold B Rabson
- Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 08901, USA.,Rutgers Graduate School of Biomedical Sciences, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 08901, USA.,Department of Pediatrics and Pharmacology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 08901, USA
| | - Lisa K Denzin
- Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 08901, USA.,Rutgers Graduate School of Biomedical Sciences, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 08901, USA.,Department of Pediatrics and Pharmacology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 08901, USA
| | - Derek B Sant'Angelo
- Child Health Institute of New Jersey, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 08901, USA.,Rutgers Graduate School of Biomedical Sciences, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 08901, USA.,Department of Pediatrics and Pharmacology, Rutgers Robert Wood Johnson Medical School, New Brunswick, NJ 08901, USA
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9
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Pla-Prats C, Thomä NH. Quality control of protein complex assembly by the ubiquitin-proteasome system. Trends Cell Biol 2022; 32:696-706. [PMID: 35300891 DOI: 10.1016/j.tcb.2022.02.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 02/17/2022] [Accepted: 02/21/2022] [Indexed: 12/12/2022]
Abstract
The majority of human proteins operate as multimeric complexes with defined compositions and distinct architectures. How the assembly of these complexes is surveyed and how defective complexes are recognized is just beginning to emerge. In eukaryotes, over 600 E3 ubiquitin ligases form part of the ubiquitin-proteasome system (UPS) which detects structural characteristics in its target proteins and selectively induces their degradation. The UPS has recently been shown to oversee key quality control steps during the assembly of protein complexes. We review recent findings on how E3 ubiquitin ligases regulate protein complex assembly and highlight unanswered questions relating to their mechanism of action.
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Affiliation(s)
- Carlos Pla-Prats
- Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, 4058 Basel, Switzerland; Faculty of Science, University of Basel, Petersplatz 1, 4001 Basel, Switzerland
| | - Nicolas H Thomä
- Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, 4058 Basel, Switzerland.
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10
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Sumathipala D, Strømme P, Fattahi Z, Lüders T, Sheng Y, Kahrizi K, Einarsen IH, Sloan JL, Najmabadi H, van den Heuvel L, Wevers RA, Guerrero-Castillo S, Mørkrid L, Valayannopoulos V, Backe PH, Venditti CP, van Karnebeek CD, Nilsen H, Frengen E, Misceo D. ZBTB11 dysfunction: spectrum of brain abnormalities, biochemical signature and cellular consequences. Brain 2022; 145:2602-2616. [PMID: 35104841 PMCID: PMC9337812 DOI: 10.1093/brain/awac034] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 12/07/2021] [Accepted: 12/20/2021] [Indexed: 11/25/2022] Open
Abstract
Bi-allelic pathogenic variants in ZBTB11 have been associated with intellectual developmental disorder, autosomal recessive 69 (MRT69; OMIM 618383). We report five patients from three families with novel, bi-allelic variants in ZBTB11. We have expanded the clinical phenotype of MRT69, documenting varied severity of atrophy affecting different brain regions and described combined malonic and methylmalonic aciduria as a biochemical manifestation. As ZBTB11 encodes for a transcriptional regulator, we performeded chromatin immunoprecipitation-sequencing targeting ZBTB11 in fibroblasts from patients and controls. Chromatin immunoprecipitation-sequencing revealed binding of wild-type ZBTB11 to promoters in 238 genes, among which genes encoding proteins involved in mitochondrial functions and RNA processing are over-represented. Mutated ZBTB11 showed reduced binding to 61 of the targeted genes, indicating that the variants act as loss of function. Most of these genes are related to mitochondrial functions. Transcriptome analysis of the patient fibroblasts revealed dysregulation of mitochondrial functions. In addition, we uncovered that reduced binding of the mutated ZBTB11 to ACSF3 leads to decreased ACSF3 transcript level, explaining combined malonic and methylmalonic aciduria. Collectively, these results expand the clinical spectrum of ZBTB11-related neurological disease and give insight into the pathophysiology in which the dysfunctional ZBTB11 affect mitochondrial functions and RNA processing contributing to the neurological and biochemical phenotypes.
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Affiliation(s)
| | | | - Zohreh Fattahi
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Torben Lüders
- Department of Clinical Molecular Biology, Section of Clinical Molecular Biology (EpiGen), University of Oslo and Akershus University Hospital, Lørenskog, Norway
| | - Ying Sheng
- Department of Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Kimia Kahrizi
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Ingunn Holm Einarsen
- Department of Medical Genetics, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Jennifer L Sloan
- Organic Acid Research Section, Medical Genomics and Metabolic Genetics Branch, NHGRI, NIH, Bethesda, MD, USA
| | - Hossein Najmabadi
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Lambert van den Heuvel
- Translational Metabolic Laboratory, Department Laboratory Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Ron A Wevers
- Translational Metabolic Laboratory, Department Laboratory Medicine, Radboud University Medical Center, Nijmegen, The Netherlands,United for Metabolic Disease—UMD, The Netherlands
| | - Sergio Guerrero-Castillo
- University Children’s Research@Kinder-UKE, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - Lars Mørkrid
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway,Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | | | - Paul Hoff Backe
- Department of Medical Biochemistry, Oslo University Hospital, Oslo, Norway,Department of Microbiology, Oslo University Hospital, Oslo, Norway
| | - Charles P Venditti
- Organic Acid Research Section, Medical Genomics and Metabolic Genetics Branch, NHGRI, NIH, Bethesda, MD, USA
| | - Clara D van Karnebeek
- Translational Metabolic Laboratory, Department Laboratory Medicine, Radboud University Medical Center, Nijmegen, The Netherlands,United for Metabolic Disease—UMD, The Netherlands,Department of Pediatrics, Centre for Molecular Medicine and Therapeutics, University of British Columbia, Vancouver, Canada
| | - Hilde Nilsen
- Department of Clinical Molecular Biology, Section of Clinical Molecular Biology (EpiGen), University of Oslo and Akershus University Hospital, Lørenskog, Norway
| | | | - Doriana Misceo
- Correspondence to: Doriana Misceo Department of Medical Genetics Oslo University Hospital and University of Oslo Postboks 4956 Nydalen, 0424 Oslo, Norway E-mail:
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11
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DUBR suppresses migration and invasion of human lung adenocarcinoma cells via ZBTB11-mediated inhibition of oxidative phosphorylation. Acta Pharmacol Sin 2022; 43:157-166. [PMID: 33758355 PMCID: PMC8724295 DOI: 10.1038/s41401-021-00624-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Accepted: 02/07/2021] [Indexed: 01/03/2023] Open
Abstract
Long noncoding RNAs (lncRNAs) are involved in a variety of cancers, but the role of LncRNA DUBR in lung adenocarcinoma (LUAD), the most prevalent form of lung cancer, remains unclear. In this study we investigated the expression of DUBR in LUAD to ascertain its association with the clinical pathology and prognosis of LUAD. Analysis of mRNA expression in The Cancer Genome Atlas (TCGA) LUAD database and in-house LUAD cohort (n = 94) showed that DUBR was significantly downregulated in LUAD, and was associated with poor prognosis. In LUAD cell lines (H1975, A549), overexpression of DUBR significantly suppressed the migration and invasion of the LUAD cells. We demonstrated that c-Myc could bind to the promoter of DUBR, and transcriptionally suppressed its expression. Knockdown of c-Myc almost completely blocked the invasion and migration of LUAD cells, whereas knockdown of DUBR partially rescued c-Myc-knockdown suppressed cell migration and invasion. Furthermore, DUBR overexpression significantly increased the expression of a downstream protein of DUBR, zinc finger, and BTB domain containing 11 (ZBTB11), in H1975 and A549 cells; knockdown of ZBTB11 partially rescued the DUBR-overexpression suppressed cell migration and invasion; knockdown of c-Myc significantly upregulated the expression of ZBTB11 in LUAD cells. Finally, we revealed that DUBR/ZBTB11 axis suppressed oxidative phosphorylation in LUAD cells. In short, we demonstrate that c-Myc/DUBR/ZBTB11 axis suppresses migration and invasion of LUAD by attenuating cell oxidative phosphorylation, which provides new insights into the regulatory mechanism of DUBR.
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12
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Carrera C, Cárcel-Márquez J, Cullell N, Torres-Águila N, Muiño E, Castillo J, Sobrino T, Campos F, Rodríguez-Castro E, Llucià-Carol L, Millán M, Muñoz-Narbona L, López-Cancio E, Bustamante A, Ribó M, Álvarez-Sabín J, Jiménez-Conde J, Roquer J, Giralt-Steinhauer E, Soriano-Tárraga C, Mola-Caminal M, Vives-Bauza C, Navarro RD, Tur S, Obach V, Arenillas JF, Segura T, Serrano-Heras G, Martí-Fàbregas J, Delgado-Mederos R, Freijo-Guerrero MM, Moniche F, Cabezas JA, Castellanos M, Gallego-Fabrega C, González-Sanchez J, Krupinsky J, Strbian D, Tatlisumak T, Thijs V, Lemmens R, Slowik A, Pera J, Kittner S, Cole J, Heitsch L, Ibañez L, Cruchaga C, Lee JM, Montaner J, Fernández-Cadenas I. Single nucleotide variations in ZBTB46 are associated with post-thrombolytic parenchymal haematoma. Brain 2021; 144:2416-2426. [PMID: 33723576 PMCID: PMC8418348 DOI: 10.1093/brain/awab090] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 02/12/2021] [Accepted: 02/25/2021] [Indexed: 12/13/2022] Open
Abstract
Haemorrhagic transformation is a complication of recombinant tissue-plasminogen activator treatment. The most severe form, parenchymal haematoma, can result in neurological deterioration, disability, and death. Our objective was to identify single nucleotide variations associated with a risk of parenchymal haematoma following thrombolytic therapy in patients with acute ischaemic stroke. A fixed-effect genome-wide meta-analysis was performed combining two-stage genome-wide association studies (n = 1904). The discovery stage (three cohorts) comprised 1324 ischaemic stroke individuals, 5.4% of whom had a parenchymal haematoma. Genetic variants yielding a P-value < 0.05 1 × 10-5 were analysed in the validation stage (six cohorts), formed by 580 ischaemic stroke patients with 12.1% haemorrhagic events. All participants received recombinant tissue-plasminogen activator; cases were parenchymal haematoma type 1 or 2 as defined by the European Cooperative Acute Stroke Study (ECASS) criteria. Genome-wide significant findings (P < 5 × 10-8) were characterized by in silico functional annotation, gene expression, and DNA regulatory elements. We analysed 7 989 272 single nucleotide polymorphisms and identified a genome-wide association locus on chromosome 20 in the discovery cohort; functional annotation indicated that the ZBTB46 gene was driving the association for chromosome 20. The top single nucleotide polymorphism was rs76484331 in the ZBTB46 gene [P = 2.49 × 10-8; odds ratio (OR): 11.21; 95% confidence interval (CI): 4.82-26.55]. In the replication cohort (n = 580), the rs76484331 polymorphism was associated with parenchymal haematoma (P = 0.01), and the overall association after meta-analysis increased (P = 1.61 × 10-8; OR: 5.84; 95% CI: 3.16-10.76). ZBTB46 codes the zinc finger and BTB domain-containing protein 46 that acts as a transcription factor. In silico studies indicated that ZBTB46 is expressed in brain tissue by neurons and endothelial cells. Moreover, rs76484331 interacts with the promoter sites located at 20q13. In conclusion, we identified single nucleotide variants in the ZBTB46 gene associated with a higher risk of parenchymal haematoma following recombinant tissue-plasminogen activator treatment.
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Affiliation(s)
- Caty Carrera
- Neurovascular Research Laboratory, VHIR, Universitat Autònoma de Barcelona, Barcelona 08035, Spain
- Stroke Pharmacogenomics and Genetics, IIB-Sant Pau, Barcelona 08025, Spain
| | | | - Natalia Cullell
- Stroke Pharmacogenomics and Genetics, IIB-Sant Pau, Barcelona 08025, Spain
- Stroke Pharmacogenomics and Genetics, Fundació Docència i Recerca Mútua Terrassa, Terrassa 08221, Spain
| | - Nuria Torres-Águila
- Stroke Pharmacogenomics and Genetics, IIB-Sant Pau, Barcelona 08025, Spain
- Stroke Pharmacogenomics and Genetics, Fundació Docència i Recerca Mútua Terrassa, Terrassa 08221, Spain
| | - Elena Muiño
- Stroke Pharmacogenomics and Genetics, IIB-Sant Pau, Barcelona 08025, Spain
| | - José Castillo
- Clinical Neurosciences Research Laboratory, IDIS, Santiago de Compostela, 15706, Spain
| | - Tomás Sobrino
- Clinical Neurosciences Research Laboratory, IDIS, Santiago de Compostela, 15706, Spain
| | - Francisco Campos
- Clinical Neurosciences Research Laboratory, IDIS, Santiago de Compostela, 15706, Spain
| | | | - Laia Llucià-Carol
- Stroke Pharmacogenomics and Genetics, IIB-Sant Pau, Barcelona 08025, Spain
| | - Mònica Millán
- Department of Neuroscience, HUGTP, Badalona 08916, Spain
| | | | | | - Alejandro Bustamante
- Neurovascular Research Laboratory, VHIR, Universitat Autònoma de Barcelona, Barcelona 08035, Spain
| | - Marc Ribó
- Stroke Unit, HUVH, Barcelona 08035, Spain
| | | | - Jordi Jiménez-Conde
- Department of Neurology, Neurovascular Research Group, IMIM-Hospital del Mar, Barcelona 08003, Spain
| | - Jaume Roquer
- Department of Neurology, Neurovascular Research Group, IMIM-Hospital del Mar, Barcelona 08003, Spain
| | - Eva Giralt-Steinhauer
- Department of Neurology, Neurovascular Research Group, IMIM-Hospital del Mar, Barcelona 08003, Spain
| | - Carolina Soriano-Tárraga
- Department of Neurology, Neurovascular Research Group, IMIM-Hospital del Mar, Barcelona 08003, Spain
| | - Marina Mola-Caminal
- Department of Neurology, Neurovascular Research Group, IMIM-Hospital del Mar, Barcelona 08003, Spain
| | | | | | - Silvia Tur
- Department of Neurology, HUSE, Mallorca 07120, Spain
| | - Victor Obach
- Department of Neurology, Hospital Clínic i Provincial de Barcelona, Barcelona 08036, Spain
| | - Juan Francisco Arenillas
- Department of Neurology, Hospital Clínico Universitario, University of Valladolid, Valladolid 47003, Spain
| | - Tomás Segura
- Department of Neurology, CHUA, Albacete 02006, Spain
| | | | - Joan Martí-Fàbregas
- Department of Neurology, Hospital de la Santa Creu i Sant Pau, IIB-Sant Pau, Barcelona 08025, Spain
| | - Raquel Delgado-Mederos
- Department of Neurology, Hospital de la Santa Creu i Sant Pau, IIB-Sant Pau, Barcelona 08025, Spain
| | - M Mar Freijo-Guerrero
- Neurovascular Unit, Biocruces Bizkaia Health Research Institute, Bilbao 48903, Spain
| | - Francisco Moniche
- Department of Neurology, Virgen del Rocío, IBIS, Seville 41023, Spain
| | | | | | - Cristina Gallego-Fabrega
- Stroke Pharmacogenomics and Genetics, IIB-Sant Pau, Barcelona 08025, Spain
- Stroke Pharmacogenomics and Genetics, Fundació Docència i Recerca Mútua Terrassa, Terrassa 08221, Spain
| | - Jonathan González-Sanchez
- Stroke Pharmacogenomics and Genetics, Fundació Docència i Recerca Mútua Terrassa, Terrassa 08221, Spain
- School of Healthcare Science, Manchester Metropolitan University, Manchester M15 6BH, UK
| | - Jurek Krupinsky
- School of Healthcare Science, Manchester Metropolitan University, Manchester M15 6BH, UK
- Neurology Unit, Hospital Universitari Mútua Terrassa, Terrassa 08221, Spain
| | - Daniel Strbian
- Department of Neurology, Helsinki University Hospital, Helsinki FI-00029, Finland
| | - Turgut Tatlisumak
- Sahlgrenska Academy at University of Gothenburg and Sahlgrenska University Hospital, Gothenburg 41345, Sweden
| | - Vincent Thijs
- Stroke Division, Florey Institute of Neuroscience and Mental Health, University of Melbourne, Heidelberg, VIC 3072, Australia
- Department of Neurology, Austin Health, Heidelberg, VIC 3072, Australia
| | - Robin Lemmens
- Department of Neurology, University Hospitals Leuven, Campus Gasthuisberg, Leuven 3000, Belgium
| | - Agnieszka Slowik
- Department of Neurology, Jagiellonian University Medical College, Kraków 31-007, Poland
| | - Johanna Pera
- Department of Neurology, Jagiellonian University Medical College, Kraków 31-007, Poland
| | - Steven Kittner
- Department of Neurology, University of Maryland School of Medicine and Baltimore, Baltimore, MD 21201-1559, USA
| | - John Cole
- Department of Neurology, University of Maryland School of Medicine and Baltimore, Baltimore, MD 21201-1559, USA
| | - Laura Heitsch
- Division of Emergency Medicine, Washington University School of Medicine, St. Louis, MO 63110-1010, USA
- Department of Neurology, Washington University School of Medicine, St. Louis, MO 63110-1010, USA
| | - Laura Ibañez
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110-1010, USA
| | - Carlos Cruchaga
- Department of Psychiatry, Washington University School of Medicine, St. Louis, MO 63110-1010, USA
| | - Jin-Moo Lee
- Department of Neurology, Washington University School of Medicine, St. Louis, MO 63110-1010, USA
| | - Joan Montaner
- Neurovascular Research Laboratory, VHIR, Universitat Autònoma de Barcelona, Barcelona 08035, Spain
- Department of Neurology, Virgen del Rocío, IBIS, Seville 41023, Spain
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13
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Olivieri D, Paramanathan S, Bardet AF, Hess D, Smallwood SA, Elling U, Betschinger J. The BTB-domain transcription factor ZBTB2 recruits chromatin remodelers and a histone chaperone during the exit from pluripotency. J Biol Chem 2021; 297:100947. [PMID: 34270961 PMCID: PMC8350017 DOI: 10.1016/j.jbc.2021.100947] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 06/21/2021] [Accepted: 07/08/2021] [Indexed: 12/12/2022] Open
Abstract
Transcription factors (TFs) harboring broad-complex, tramtrack, and bric-a-brac (BTB) domains play important roles in development and disease. These BTB domains are thought to recruit transcriptional modulators to target DNA regions. However, a systematic molecular understanding of the mechanism of action of this TF family is lacking. Here, we identify the zinc finger BTB-TF Zbtb2 from a genetic screen for regulators of exit from pluripotency and demonstrate that its absence perturbs embryonic stem cell differentiation and the gene expression dynamics underlying peri-implantation development. We show that ZBTB2 binds the chromatin remodeler Ep400 to mediate downstream transcription. Independently, the BTB domain directly interacts with nucleosome remodeling and deacetylase and histone chaperone histone regulator A. Nucleosome remodeling and deacetylase recruitment is a common feature of BTB TFs, and based on phylogenetic analysis, we propose that this is a conserved evolutionary property. Binding to UBN2, in contrast, is specific to ZBTB2 and requires a C-terminal extension of the BTB domain. Taken together, this study identifies a BTB-domain TF that recruits chromatin modifiers and a histone chaperone during a developmental cell state transition and defines unique and shared molecular functions of the BTB-domain TF family.
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Affiliation(s)
- Daniel Olivieri
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland.
| | | | - Anaïs F Bardet
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland; CNRS, University of Strasbourg, UMR7242 Biotechnology and Cell Signaling, Illkirch, France
| | - Daniel Hess
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland
| | | | - Ulrich Elling
- Institute of Molecular Biotechnology of the Austrian Academy of Science (IMBA), Vienna BioCenter (VBC), Vienna, Austria
| | - Joerg Betschinger
- Friedrich Miescher Institute for Biomedical Research, Basel, Switzerland.
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14
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Wong R, Bhattacharya D. ZBTB38 is dispensable for antibody responses. PLoS One 2020; 15:e0235183. [PMID: 32956421 PMCID: PMC7505459 DOI: 10.1371/journal.pone.0235183] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 09/07/2020] [Indexed: 12/19/2022] Open
Abstract
Members of the broad complex, tram track, bric-a-brac and zinc finger (BTB-ZF) family of transcription factors, such as BCL-6, ZBTB20, and ZBTB32, regulate antigen-specific B cell differentiation, plasma cell longevity, and the duration of antibody production. We found that ZBTB38, a different member of the BTB-ZF family that binds methylated DNA at CpG motifs, is highly expressed by germinal center B cells and plasma cells. To define the functional role of ZBTB38 in B cell responses, we generated mice conditionally deficient in this transcription factor. Germinal center B cells lacking ZBTB38 dysregulated very few genes relative to wild-type and heterozygous littermate controls. Accordingly, mice with hematopoietic-specific deletion of Zbtb38 showed normal germinal center B cell numbers and antibody responses following immunization with hapten-protein conjugates. Memory B cells from these animals functioned normally in secondary recall responses. Despite expression of ZBTB38 in hematopoietic stem cells, progenitors and mature myeloid and lymphoid lineages were also present in normal numbers in mutant mice. These data demonstrate that ZBTB38 is dispensable for hematopoiesis and antibody responses. These conditional knockout mice may instead be useful in defining the functional importance of ZBTB38 in other cell types and contexts.
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Affiliation(s)
- Rachel Wong
- Division of Biological and Biomedical Sciences, Washington University in St. Louis, Saint Louis, MO, United States of America
- Department of Immunobiology, University of Arizona, Tucson, AZ, United States of America
| | - Deepta Bhattacharya
- Department of Immunobiology, University of Arizona, Tucson, AZ, United States of America
- * E-mail:
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15
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Ren AJ, Chen C, Zhang S, Liu M, Wei C, Wang K, Ma X, Song Y, Wang R, Zhang H, Chen YX, Wu H, Xie Z, Zhang Y, Zhang WJ. Zbtb20 deficiency causes cardiac contractile dysfunction in mice. FASEB J 2020; 34:13862-13876. [PMID: 32844471 DOI: 10.1096/fj.202000160rr] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 08/04/2020] [Accepted: 08/07/2020] [Indexed: 12/15/2022]
Abstract
The zinc-finger protein ZBTB20 regulates development and metabolism in multiple systems, and is essential for postnatal survival in mice. However, its potential role in the cardiovascular system remains undefined. Here, we demonstrate that ZBTB20 is critically involved in the regulation of cardiac contractility and blood pressure in mice. At the age of 16 days, the relatively healthy Zbtb20-null mice exhibited hypotension without obvious change of heart rate or other evidence for heart failure. Moreover, Zbtb20 deletion led to a marked reduction in heart size, left ventricular wall thickness, and cell size of cardiomyocytes, which was largely proportional to the decreased body growth. Notably, echocardiographic and hemodynamic analyses showed that cardiac contractility was greatly impaired in the absence of ZBTB20. Mechanistically, ZBTB20 deficiency decreased cardiac ATP contents, and compromised the enzyme activity of mitochondrial complex I in heart as well as L-type calcium current density in cardiomyocytes. Furthermore, the developmental activation of some mitochondrial function-related genes was significantly attenuated in Zbtb20-null myocardium, which included Hspb8, Ckmt2, Cox7a1, Tfrc, and Ogdhl. Put together, these results suggest that ZBTB20 plays a crucial role in the regulation of heart development, energy metabolism, and contractility.
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Affiliation(s)
- An-Jing Ren
- Department of Pathophysiology, Naval Medical University, Shanghai, China
| | - Chao Chen
- Institute of Vascular Medicine, Peking University Third Hospital, Beijing, China
| | - Sha Zhang
- Department of Pathophysiology, Naval Medical University, Shanghai, China.,Department of Cardiovascular Diseases, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Mengna Liu
- Department of Pathophysiology, Naval Medical University, Shanghai, China
| | - Chunchun Wei
- Department of Pathophysiology, Naval Medical University, Shanghai, China
| | - Kai Wang
- Department of Pathophysiology, Naval Medical University, Shanghai, China
| | - Xianhua Ma
- Department of Pathophysiology, Naval Medical University, Shanghai, China
| | - Yao Song
- Institute of Vascular Medicine, Peking University Third Hospital, Beijing, China
| | - Rui Wang
- Department of Pathophysiology, Naval Medical University, Shanghai, China
| | - Hai Zhang
- Department of Pathophysiology, Naval Medical University, Shanghai, China
| | - Yu-Xia Chen
- Department of Pathophysiology, Naval Medical University, Shanghai, China
| | - Hong Wu
- Department of Cardiovascular Diseases, Changhai Hospital, Naval Medical University, Shanghai, China
| | - Zhifang Xie
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Youyi Zhang
- Institute of Vascular Medicine, Peking University Third Hospital, Beijing, China
| | - Weiping J Zhang
- Department of Pathophysiology, Naval Medical University, Shanghai, China.,NHC Key Laboratory of Hormones and Development, Tianjin Institute of Endocrinology, Tianjin Medical University Chu Hsien-I Memorial Hospital, Tianjin, China
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16
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Piepoli S, Alt AO, Atilgan C, Mancini EJ, Erman B. Structural analysis of the PATZ1 BTB domain homodimer. Acta Crystallogr D Struct Biol 2020; 76:581-593. [PMID: 32496219 PMCID: PMC7271949 DOI: 10.1107/s2059798320005355] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 04/16/2020] [Indexed: 11/10/2022] Open
Abstract
PATZ1 is a ubiquitously expressed transcriptional repressor belonging to the ZBTB family that is functionally expressed in T lymphocytes. PATZ1 targets the CD8 gene in lymphocyte development and interacts with the p53 protein to control genes that are important in proliferation and in the DNA-damage response. PATZ1 exerts its activity through an N-terminal BTB domain that mediates dimerization and co-repressor interactions and a C-terminal zinc-finger motif-containing domain that mediates DNA binding. Here, the crystal structures of the murine and zebrafish PATZ1 BTB domains are reported at 2.3 and 1.8 Å resolution, respectively. The structures revealed that the PATZ1 BTB domain forms a stable homodimer with a lateral surface groove, as in other ZBTB structures. Analysis of the lateral groove revealed a large acidic patch in this region, which contrasts with the previously resolved basic co-repressor binding interface of BCL6. A large 30-amino-acid glycine- and alanine-rich central loop, which is unique to mammalian PATZ1 amongst all ZBTB proteins, could not be resolved, probably owing to its flexibility. Molecular-dynamics simulations suggest a contribution of this loop to modulation of the mammalian BTB dimerization interface.
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Affiliation(s)
- Sofia Piepoli
- Faculty of Engineering and Natural Sciences, Sabanci University, Orta Mahalle, Üniversite Caddesi No. 27, Orhanlı, Tuzla, 34956 Istanbul, Turkey
| | - Aaron Oliver Alt
- School of Life Sciences, University of Sussex, Falmer, Brighton BN1 9QG, United Kingdom
| | - Canan Atilgan
- Faculty of Engineering and Natural Sciences, Sabanci University, Orta Mahalle, Üniversite Caddesi No. 27, Orhanlı, Tuzla, 34956 Istanbul, Turkey
- Sabanci University Nanotechnology Research and Application Center, SUNUM, 34956 Istanbul, Turkey
| | - Erika Jazmin Mancini
- School of Life Sciences, University of Sussex, Falmer, Brighton BN1 9QG, United Kingdom
| | - Batu Erman
- Faculty of Engineering and Natural Sciences, Sabanci University, Orta Mahalle, Üniversite Caddesi No. 27, Orhanlı, Tuzla, 34956 Istanbul, Turkey
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17
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He Z, Zhu J, Mo J, Zhao H, Chen Q. HBV DNA integrates into upregulated ZBTB20 in patients with hepatocellular carcinoma. Mol Med Rep 2020; 22:380-386. [PMID: 32319639 PMCID: PMC7248478 DOI: 10.3892/mmr.2020.11074] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 03/18/2020] [Indexed: 12/27/2022] Open
Abstract
Hepatitis B virus (HBV) affects the malignant phenotype of hepatocellular carcinoma (HCC). The aim of the present study was to investigate the integration sites of HBV DNA and the expression of the zinc finger protein, zinc finger and BTB domain containing 20 (ZBTB20) in patients with hepatocellular carcinoma. Integration of the HBV gene was detected using a high-throughput sequencing technique based on the HBV-Alu-PCR method. The expression of ZBTB20 was detected by western blotting. HBVX integration sites were detected in ~70% of the HCC tissue samples. HBV-integrated subgene X detection suggested that 67% of the integrated specimens were inserted into the host X gene in a forward direction, 57% in a reverse direction, 24% in both forward and reverse directions, and 38% had two HBV integration sites. A total of 3,320 HBV integration sites were identified, including 1,397 in HCC tissues, 1,205 in paracancerous tissues and 718 in normal liver tissues. HBV integration fragments displayed enrichment in the 200–800 bp region. Additionally, the results suggested that HBV was highly integrated into transmembrane phosphatase with tensin homology, long intergenic non-protein coding RNA (LINC)00618, LOC101929241, ACTR3 pseudogene 5, LINC00999, LOC101928775, deleted in oesophageal cancer 1, LINC00824, EBF transcription factor 2 and ZBTB20 in tumour tissues. Furthermore, the expression of ZBTB20 was upregulated in HCC tissues compared with normal control liver tissues, and was associated with HBV integration frequency. The present study suggested that HBV DNA integrated into upregulated ZBTB20 in patients with hepatocellular carcinoma, which might promote the occurrence and development of HCC. Furthermore, the results of the present study may provide a theoretical basis for the diagnosis and treatment of HCC.
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Affiliation(s)
- Zebao He
- Department of Neurology, Taizhou Enze Medical Center Enze Hospital, Taizhou, Zhejiang 318000, P.R. China
| | - Jiansheng Zhu
- Department of Neurology, Taizhou Enze Medical Center Enze Hospital, Taizhou, Zhejiang 318000, P.R. China
| | - Jinggang Mo
- Department of Neurology, Taizhou Central Hospital, Taizhou University Hospital, Taizhou, Zhejiang 318000, P.R. China
| | - Haihong Zhao
- Department of Neurology, Taizhou Enze Medical Center Enze Hospital, Taizhou, Zhejiang 318000, P.R. China
| | - Qiuyue Chen
- Department of Neurology, Taizhou Central Hospital, Taizhou University Hospital, Taizhou, Zhejiang 318000, P.R. China
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18
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Mayor-Ruiz C, Jaeger MG, Bauer S, Brand M, Sin C, Hanzl A, Mueller AC, Menche J, Winter GE. Plasticity of the Cullin-RING Ligase Repertoire Shapes Sensitivity to Ligand-Induced Protein Degradation. Mol Cell 2020; 75:849-858.e8. [PMID: 31442425 DOI: 10.1016/j.molcel.2019.07.013] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 06/13/2019] [Accepted: 07/09/2019] [Indexed: 12/20/2022]
Abstract
Inducing protein degradation via small molecules is a transformative therapeutic paradigm. Although structural requirements of target degradation are emerging, mechanisms determining the cellular response to small-molecule degraders remain poorly understood. To systematically delineate effectors required for targeted protein degradation, we applied genome-scale CRISPR/Cas9 screens for five drugs that hijack different substrate receptors (SRs) of cullin RING ligases (CRLs) to induce target proteolysis. We found that sensitivity to small-molecule degraders is dictated by shared and drug-specific modulator networks, including the COP9 signalosome and the SR exchange factor CAND1. Genetic or pharmacologic perturbation of these effectors impairs CRL plasticity and arrests a wide array of ligases in a constitutively active state. Resulting defects in CRL decommissioning prompt widespread CRL auto-degradation that confers resistance to multiple degraders. Collectively, our study informs on regulation and architecture of CRLs amenable for targeted protein degradation and outlines biomarkers and putative resistance mechanisms for upcoming clinical investigation.
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Affiliation(s)
- Cristina Mayor-Ruiz
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Lazarettgasse 14, AKH BT 25.3, 1090 Vienna, Austria.
| | - Martin G Jaeger
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Lazarettgasse 14, AKH BT 25.3, 1090 Vienna, Austria
| | - Sophie Bauer
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Lazarettgasse 14, AKH BT 25.3, 1090 Vienna, Austria
| | - Matthias Brand
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Lazarettgasse 14, AKH BT 25.3, 1090 Vienna, Austria
| | - Celine Sin
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Lazarettgasse 14, AKH BT 25.3, 1090 Vienna, Austria
| | - Alexander Hanzl
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Lazarettgasse 14, AKH BT 25.3, 1090 Vienna, Austria
| | - André C Mueller
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Lazarettgasse 14, AKH BT 25.3, 1090 Vienna, Austria
| | - Jörg Menche
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Lazarettgasse 14, AKH BT 25.3, 1090 Vienna, Austria
| | - Georg E Winter
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Lazarettgasse 14, AKH BT 25.3, 1090 Vienna, Austria.
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19
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Kelch-like proteins: Physiological functions and relationships with diseases. Pharmacol Res 2019; 148:104404. [DOI: 10.1016/j.phrs.2019.104404] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 08/15/2019] [Accepted: 08/19/2019] [Indexed: 02/07/2023]
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20
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Aktar S, Sasaki H, Unoki M. Identification of ZBTB24 protein domains and motifs for heterochromatin localization and transcriptional activation. Genes Cells 2019; 24:746-755. [PMID: 31561277 DOI: 10.1111/gtc.12723] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 09/19/2019] [Accepted: 09/23/2019] [Indexed: 12/27/2022]
Abstract
Immunodeficiency, centromeric instability, facial anomalies (ICF) syndrome is a rare autosomal recessive disorder caused by mutations in either DNMT3B, ZBTB24, CDCA7, HELLS or an unknown gene(s). Among the known causative genes, ZBTB24 encodes a member of the BTB-zinc finger (ZF) transcription factor family. The protein possesses a BTB domain, an AT-hook and eight C2H2 ZF motifs. All ZBTB24 mutations reported in ICF patients are predicted to disrupt at least one ZF motif. Here, we show that both AT-hook and distinct ZF motifs, particularly the 6th motif, of human and mouse ZBTB24 proteins are important for their heterochromatin localization. On the other hand, the 6th and 7th ZF motifs, and not the AT-hook or the BTB domain, of the human and mouse proteins are essential for transcriptional activation of CDCA7, another ICF causative gene and a known target of ZBTB24. By deletion analysis of the human CDCA7 promoter, we show that two motifs for ZBTB24 binding are important for transcriptional activation of this gene. These results reveal the evolutionarily conserved domains and motifs important for the biological function of ZBTB24, which provides a basis for understanding the molecular mechanisms underlying the pathogenesis of ICF syndrome.
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Affiliation(s)
- Sharmin Aktar
- Division of Epigenomics and Development, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
| | - Hiroyuki Sasaki
- Division of Epigenomics and Development, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
| | - Motoko Unoki
- Division of Epigenomics and Development, Medical Institute of Bioregulation, Kyushu University, Fukuoka, Japan
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21
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Hamada H, Yamamura M, Ohi H, Kobayashi Y, Niwa K, Oyama T, Mano Y, Asai M, Tanuma SI, Uchiumi F. Characterization of the human zinc finger nfx‑1‑type containing 1 encoding ZNFX1 gene and its response to 12‑O‑tetradecanoyl‑13‑acetate in HL‑60 cells. Int J Oncol 2019; 55:896-904. [PMID: 31432148 DOI: 10.3892/ijo.2019.4860] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 07/19/2019] [Indexed: 11/06/2022] Open
Abstract
Human promyelocytic HL‑60 cells can be differentiated into macrophage‑like cells by treatment with 12‑O‑tetra decanoylphorbol‑13‑acetate (TPA). Certain 5' upstream regions of the zinc finger protein (ZNF)‑encoding genes contain duplicated GGAA motifs, which are frequently found in the TPA‑responding gene promoter regions. To examine transcriptional responses to TPA, 5'flanking regions of human zinc finger CCCH‑type containing, antiviral, ZNF252, ZNF343, ZNF555, ZNF782 and zinc finger nfx‑1‑type containing 1 (ZNFX1) genes were isolated by polymerase chain reaction (PCR) and ligated into a multiple‑cloning site of the pGL4.10[luc2] vector. Transient transfection and a luciferase assay revealed that the ZNFX1 promoter most prominently responded to the TPA treatment. Deletion and point mutation experiments indicated that the duplicated GGAA motif in the 100‑bp region positively responded to TPA. In addition, reverse transcription‑quantitative PCR and western blotting showed that the mRNA and protein of ZNFX1 accumulate during the differentiation of HL‑60 cells. These results indicated that expression of the TPA‑inducible ZNFX1 gene, which belongs to the group of interferon‑responsive genes, is regulated by the cis‑action of the duplicated GGAA motif.
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Affiliation(s)
- Hiroshi Hamada
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Mayu Yamamura
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Hiroto Ohi
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Yota Kobayashi
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Kuniyoshi Niwa
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Takahiro Oyama
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Yasunari Mano
- Department of Clinical Drug Informatics, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Masashi Asai
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Sei-Ichi Tanuma
- Department of Biochemistry, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
| | - Fumiaki Uchiumi
- Department of Gene Regulation, Faculty of Pharmaceutical Sciences, Tokyo University of Science, Noda‑shi, Chiba‑ken 278‑8510, Japan
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22
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Sogkas G, Dubrowinskaja N, Bergmann AK, Lentes J, Ripperger T, Fedchenko M, Ernst D, Jablonka A, Geffers R, Baumann U, Schmidt RE, Atschekzei F. Progressive Immunodeficiency with Gradual Depletion of B and CD4⁺ T Cells in Immunodeficiency, Centromeric Instability and Facial Anomalies Syndrome 2 (ICF2). Diseases 2019; 7:diseases7020034. [PMID: 30987377 PMCID: PMC6631482 DOI: 10.3390/diseases7020034] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 04/02/2019] [Accepted: 04/04/2019] [Indexed: 12/29/2022] Open
Abstract
Immunodeficiency, centromeric instability and facial anomalies syndrome 2 (ICF2) is a rare autosomal recessive primary immunodeficiency disorder. So far, 27 patients have been reported. Here, we present three siblings with ICF2 due to a homozygous ZBTB24 gene mutation (c.1222 T>G, p. (Cys408Gly)). Immune deficiency in these patients ranged from late-onset combined immunodeficiency (CID) with severe respiratory tract infections and recurrent shingles to asymptomatic selective antibody deficiency. Evident clinical heterogeneity manifested despite a common genetic background, suggesting the pathogenic relevance of epigenetic modification. Immunological follow-up reveals a previously unidentified gradual depletion of B and CD4+ T cells in all three presented patients with transition of a common variable immunodeficiency (CVID)-like disease to late-onset-CID in one of them. Considering all previously published cases with ICF2, we identify inadequate antibody responses to vaccines and reduction in CD27+ memory B cells as prevalent immunological traits. High mortality among ICF2 patients (20%) together with the progressive course of immunodeficiency suggest that hematopoietic stem cell transplantation (HSCT) should be considered as a treatment option in due time.
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Affiliation(s)
- Georgios Sogkas
- Department of Clinical Immunology and Rheumatology, Hannover Medical School, 30625 Hannover, Germany.
| | - Natalia Dubrowinskaja
- Department of Clinical Immunology and Rheumatology, Hannover Medical School, 30625 Hannover, Germany.
| | - Anke K Bergmann
- Department of Human Genetics, Hannover Medical School, 30625 Hannover, Germany.
| | - Jana Lentes
- Department of Human Genetics, Hannover Medical School, 30625 Hannover, Germany.
| | - Tim Ripperger
- Department of Human Genetics, Hannover Medical School, 30625 Hannover, Germany.
| | - Mykola Fedchenko
- Institute of Pathology, Hannover Medical School, 30625 Hannover, Germany.
| | - Diana Ernst
- Department of Clinical Immunology and Rheumatology, Hannover Medical School, 30625 Hannover, Germany.
| | - Alexandra Jablonka
- Department of Clinical Immunology and Rheumatology, Hannover Medical School, 30625 Hannover, Germany.
| | - Robert Geffers
- Helmholtz Centre for Infection Research, 38124 Braunschweig, Germany.
| | - Ulrich Baumann
- Department of Paediatric Pulmonology, Allergy and Neonatology, Hannover Medical School, 30625 Hannover, Germany.
| | - Reinhold E Schmidt
- Department of Clinical Immunology and Rheumatology, Hannover Medical School, 30625 Hannover, Germany.
| | - Faranaz Atschekzei
- Department of Clinical Immunology and Rheumatology, Hannover Medical School, 30625 Hannover, Germany.
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23
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Wang J, Wang T, Benedicenti O, Collins C, Wang K, Secombes CJ, Zou J. Characterisation of ZBTB46 and DC-SCRIPT/ZNF366 in rainbow trout, transcription factors potentially involved in dendritic cell maturation and activation in fish. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2018; 80:2-14. [PMID: 27889532 DOI: 10.1016/j.dci.2016.11.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Revised: 11/05/2016] [Accepted: 11/05/2016] [Indexed: 06/06/2023]
Abstract
ZBTB46 and DC-SCRIPT/ZNF366 are two zinc finger transcription factors that play important roles in regulating differentiation of dendritic cells in mammals. In this study, the ZBTB46 and DC-SCRIPT/ZNF366 homologues were identified in rainbow trout Oncorhynchus mykiss and their expression analysed in vivo and in vitro. As transcription factors, they are well conserved in sequence, genomic organisation and gene synteny. Their expression was differentially modulated by bacterial and viral PAMPs in the monocyte/macrophage-like cell line RTS-11, in primary head kidney (HK) macrophages, and in HK macrophages cultured with IL-4/13A. In the RTS-11 cells and primary HK macrophages, all the ZBTB46 and DC-SCRIPT/ZNF366 homologues were down-regulated by interferon gamma (type II IFN) but unaffected by IFN2 (type I IFN), administered as recombinant proteins to cell cultures. In fish gills, infection with amoebae (Paramoebae perurans) resulted in reduction of ZBTB46 and DC-SCRIPT/ZNF366 expression in Atlantic salmon Salmo salar, whilst infection with Yersinia ruckeri induced gene expression in rainbow trout.
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Affiliation(s)
- Jun Wang
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 2TZ, UK; Department of Basic Veterinary, Sichuan Agricultural University, Huimin Road No. 211, Chengdu 611130, China
| | - Tiehui Wang
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 2TZ, UK
| | - Ottavia Benedicenti
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 2TZ, UK
| | - Catherine Collins
- Marine Scotland Science Marine Laboratory, 375 Victoria Rd, Aberdeen AB11 9DB, UK
| | - Kaiyu Wang
- Department of Basic Veterinary, Sichuan Agricultural University, Huimin Road No. 211, Chengdu 611130, China
| | - Christopher J Secombes
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 2TZ, UK
| | - Jun Zou
- Scottish Fish Immunology Research Centre, Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 2TZ, UK.
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24
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Zhang X, Lu Y, Cao X, Zhen T, Kovalovsky D. Zbtb1 prevents default myeloid differentiation of lymphoid-primed multipotent progenitors. Oncotarget 2018; 7:58768-58778. [PMID: 27542215 PMCID: PMC5312274 DOI: 10.18632/oncotarget.11356] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Accepted: 08/02/2016] [Indexed: 11/25/2022] Open
Abstract
Zbtb1 is a transcription factor that prevents DNA damage and p53-mediated apoptosis in replicating immune progenitors, affecting lymphoid as well as myeloid development when hematopoietic progenitors are in competition in mixed bone marrow chimeras. However, Zbtb1-deficient mice do not have an apparent myeloid deficiency. We report here that Zbtb1-deficient lymphoid-primed multipotent progenitors (LMPPs) are biased to develop towards the myeloid fate in detriment of lymphoid development, contributing to the apparent unaffected myeloid development. Zbtb1 expression was maintained during lymphoid development of LMPP cells but downregulated during myeloid development. Deficiency of Zbtb1 in LMPP cells was sufficient to direct a myeloid fate in lymphoid-inducing conditions and in the absence of myeloid cytokines as shown by upregulation of a myeloid gene signature and the generation of myeloid cells in vitro. Finally, biased myeloid differentiation of Zbtb1-deficient LMPP cells was not due to increased p53-dependent apoptosis as it was not reverted by transgenic Bcl2 expression or p53 deficiency. Altogether, our results show that Zbtb1 expression prevents activation of a default myeloid program in LMPP cells, ensuring the generation of lymphoid cells.
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Affiliation(s)
- Xianyu Zhang
- Experimental Immunology Branch, NCI, NIH, Maryland, USA
| | - Ying Lu
- Experimental Immunology Branch, NCI, NIH, Maryland, USA
| | - Xin Cao
- College of Life Science and Engineering, Northwest University for Nationalities, Gansu Engineering Research Center for Animal Cell, Lanzhou, China
| | - Tao Zhen
- Oncogenesis and Development Section, National Human Genome Research Institute, NIH, Maryland, USA
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25
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Zinc Finger-Containing Cellular Transcription Corepressor ZBTB25 Promotes Influenza Virus RNA Transcription and Is a Target for Zinc Ejector Drugs. J Virol 2017; 91:JVI.00842-17. [PMID: 28768860 DOI: 10.1128/jvi.00842-17] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 07/24/2017] [Indexed: 02/03/2023] Open
Abstract
Influenza A virus (IAV) replication relies on an intricate interaction between virus and host cells. How the cellular proteins are usurped for IAV replication remains largely obscure. The aim of this study was to search for novel and potential cellular factors that participate in IAV replication. ZBTB25, a transcription repressor of a variety of cellular genes, was identified by an RNA interference (RNAi) genomic library screen. Depletion of ZBTB25 significantly reduced IAV production. Conversely, overexpression of ZBTB25 enhanced it. ZBTB25 interacted with the viral RNA-dependent RNA polymerase (RdRp) protein and modulated its transcription activity. In addition, ZBTB25 also functioned as a viral RNA (vRNA)-binding protein, binding preferentially to the U-rich sequence within the 5' untranslated region (UTR) of vRNA. Both protein-protein and protein-RNA interactions involving ZBTB25 facilitated viral RNA transcription and replication. In addition, ZBTB25 suppressed interferon production, further enhancing viral replication. ZBTB25-associated functions required an intact zinc finger domain and posttranslational SUMO-1 modification of ZBTB25. Furthermore, treatment with disulfiram (a zinc ejector) of ZBTB25-overexpressing cells showed significantly reduced IAV production as a result of reduced RNA synthesis. Our findings indicate that IAV usurps ZBTB25 for IAV RNA synthesis and serves as a novel and potential therapeutic antiviral target.IMPORTANCE IAV-induced seasonal influenza causes severe illness and death in high-risk populations. However, IAV has developed resistance to current antiviral drugs due to its high mutation rate. Therefore, development of drugs targeting cellular factors required for IAV replication is an attractive alternative for IAV therapy. Here, we discovered a cellular protein, ZBTB25, that enhances viral RdRp activity by binding to both viral RdRp and viral RNA to stimulate viral RNA synthesis. A unique feature of ZBTB25 in the regulation of viral replication is its dual transcription functions, namely, promoting viral RNA transcription through binding to the U-rich region of vRNA and suppressing cellular interferon production. ZBTB25 contains a zinc finger domain that is required for RNA-inhibitory activity by chelating zinc ions. Disulfiram treatment disrupts the zinc finger functions, effectively repressing IAV replication. Based on our findings, we demonstrate that ZBTB25 regulates IAV RNA transcription and replication and serves as a promising antiviral target for IAV treatment.
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26
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Keightley MC, Carradice DP, Layton JE, Pase L, Bertrand JY, Wittig JG, Dakic A, Badrock AP, Cole NJ, Traver D, Nutt SL, McCoey J, Buckle AM, Heath JK, Lieschke GJ. The Pu.1 target gene Zbtb11 regulates neutrophil development through its integrase-like HHCC zinc finger. Nat Commun 2017; 8:14911. [PMID: 28382966 PMCID: PMC5384227 DOI: 10.1038/ncomms14911] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 02/13/2017] [Indexed: 12/27/2022] Open
Abstract
In response to infection and injury, the neutrophil population rapidly expands and then quickly re-establishes the basal state when inflammation resolves. The exact pathways governing neutrophil/macrophage lineage outputs from a common granulocyte-macrophage progenitor are still not completely understood. From a forward genetic screen in zebrafish, we identify the transcriptional repressor, ZBTB11, as critical for basal and emergency granulopoiesis. ZBTB11 sits in a pathway directly downstream of master myeloid regulators including PU.1, and TP53 is one direct ZBTB11 transcriptional target. TP53 repression is dependent on ZBTB11 cys116, which is a functionally critical, metal ion-coordinating residue within a novel viral integrase-like zinc finger domain. To our knowledge, this is the first description of a function for this domain in a cellular protein. We demonstrate that the PU.1–ZBTB11–TP53 pathway is conserved from fish to mammals. Finally, Zbtb11 mutant rescue experiments point to a ZBTB11-regulated TP53 requirement in development of other organs. Neutrophils are increased in response to injury and infection but how they form from a common granulocyte-macrophage progenitor is unclear. Here, the authors identify a role for the transcriptional repressor ZBTB11 in zebrafish, which is regulated by master myeloid regulators and represses TP53.
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Affiliation(s)
- Maria-Cristina Keightley
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria 3800, Australia.,The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3050, Australia
| | - Duncan P Carradice
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3050, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Judith E Layton
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3050, Australia.,Ludwig Institute for Cancer Research, Melbourne-Parkville Branch, The Royal Melbourne Hospital, Parkville, Victoria 3050, Australia
| | - Luke Pase
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria 3800, Australia.,The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3050, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Julien Y Bertrand
- Department of Pathology and Immunology, University of Geneva-CMU, 1211 Geneva 4, Switzerland
| | - Johannes G Wittig
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Aleksandar Dakic
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3050, Australia
| | - Andrew P Badrock
- Faculty of Life Sciences, The University of Manchester, Manchester M13 9PL, UK
| | - Nicholas J Cole
- Motor Neuron Disease Research Group, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, New South Wales 2109, Australia
| | - David Traver
- Department of Cellular and Molecular Medicine, University of California at San Diego, La Jolla, California 92093, USA
| | - Stephen L Nutt
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3050, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Julia McCoey
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria 3800, Australia
| | - Ashley M Buckle
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria 3800, Australia
| | - Joan K Heath
- The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3050, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Victoria 3010, Australia.,Ludwig Institute for Cancer Research, Melbourne-Parkville Branch, The Royal Melbourne Hospital, Parkville, Victoria 3050, Australia
| | - Graham J Lieschke
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria 3800, Australia.,The Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, Victoria 3050, Australia.,Ludwig Institute for Cancer Research, Melbourne-Parkville Branch, The Royal Melbourne Hospital, Parkville, Victoria 3050, Australia
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27
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Maeda T. Regulation of hematopoietic development by ZBTB transcription factors. Int J Hematol 2016; 104:310-23. [PMID: 27250345 DOI: 10.1007/s12185-016-2035-x] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 05/26/2016] [Accepted: 05/26/2016] [Indexed: 12/19/2022]
Abstract
Hematopoietic development is governed by the coordinated expression of lineage- and differentiation stage-specific genes. Transcription factors play major roles in this process and their perturbation may underlie hematologic and immunologic disorders. Nearly 1900 transcription factors are encoded in the human genome: of these, 49 BTB (for broad-complex, tram-track and bric à brac)-zinc finger transcription factors referred to as ZBTB or POK proteins have been identified. ZBTB proteins, including BCL6, PLZF, ThPOK and LRF, exhibit a broad spectrum of functions in normal and malignant hematopoiesis. This review summarizes developmental and molecular functions of ZBTB proteins relevant to hematology.
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Affiliation(s)
- Takahiro Maeda
- Division of Hematology, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, One Blackfan Circle, Boston, MA, 02115, USA.
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28
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Downregulation of ZBTB24 hampers the G0/1- to S-phase cell-cycle transition via upregulating the expression of IRF-4 in human B cells. Genes Immun 2016; 17:276-82. [PMID: 27098601 DOI: 10.1038/gene.2016.18] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 03/30/2016] [Accepted: 03/31/2016] [Indexed: 12/27/2022]
Abstract
It has been recently identified that loss-of-function mutations in the uncharacterized gene ZBTB24 (zinc finger and BTB domain-containing 24) cause ICF2 (immunodeficiency, centromeric instability and facial anomalies syndrome 2) with immunological characteristics of greatly reduced serum antibodies and circulating memory B cells. ZBTB24 belongs to the large ZBTB family of transcriptional repressors with members like B-cell lymphoma 6 (BCL-6; ZBTB27) playing critical roles in B-cell functions. Given the genotype-phenotype correlation analyses in ICF2 patients and the high expression of ZBTB24 in human B cells, we, in the present study, investigated the function of ZBTB24 in human B-cell line Raji cells. Knockdown of endogenous ZBTB24 by small hairpin RNAs results in a significantly reduced proliferation through blocking the G0/1- to S-phase cell-cycle progression, but not apoptosis induction. Moreover, downregulation of ZBTB24 increases the expression of IRF-4 (interferon regulatory factor 4) and Blimp-1 (B lymphocyte-induced maturation protein 1), two crucial factors involved in the proliferation and differentiation of B cells. Importantly, ZBTB24 exerts these functions independent of BCL-6 as it does not affect the expression and function of BCL-6. Our study thus not only provides a molecular explanation for the B-cell and antibody defects observed in ZBTB24-deficient ICF2 patients, but also indicates that ZBTB24 represents a novel transcriptional factor essentially involved in human B-cell functions.
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Weisel FJ, Zuccarino-Catania GV, Chikina M, Shlomchik MJ. A Temporal Switch in the Germinal Center Determines Differential Output of Memory B and Plasma Cells. Immunity 2016; 44:116-130. [PMID: 26795247 DOI: 10.1016/j.immuni.2015.12.004] [Citation(s) in RCA: 366] [Impact Index Per Article: 45.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Revised: 08/15/2015] [Accepted: 09/24/2015] [Indexed: 10/22/2022]
Abstract
There is little insight into or agreement about the signals that control differentiation of memory B cells (MBCs) and long-lived plasma cells (LLPCs). By performing BrdU pulse-labeling studies, we found that MBC formation preceded the formation of LLPCs in an adoptive transfer immunization system, which allowed for a synchronized Ag-specific response with homogeneous Ag-receptor, yet at natural precursor frequencies. We confirmed these observations in wild-type (WT) mice and extended them with germinal center (GC) disruption experiments and variable region gene sequencing. We thus show that the GC response undergoes a temporal switch in its output as it matures, revealing that the reaction engenders both MBC subsets with different immune effector function and, ultimately, LLPCs at largely separate points in time. These data demonstrate the kinetics of the formation of the cells that provide stable humoral immunity and therefore have implications for autoimmunity, for vaccine development, and for understanding long-term pathogen resistance.
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Affiliation(s)
- Florian J Weisel
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA
| | | | - Maria Chikina
- Department of Computational and Systems Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15260, USA
| | - Mark J Shlomchik
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA; Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA.
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Chevrier S, Emslie D, Shi W, Kratina T, Wellard C, Karnowski A, Erikci E, Smyth GK, Chowdhury K, Tarlinton D, Corcoran LM. The BTB-ZF transcription factor Zbtb20 is driven by Irf4 to promote plasma cell differentiation and longevity. ACTA ACUST UNITED AC 2014; 211:827-40. [PMID: 24711583 PMCID: PMC4010913 DOI: 10.1084/jem.20131831] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Zbtb20 facilitates terminal differentiation of B cells into antibody-secreting cells, and its expression is dependent on Irf4 and independent of Blimp1. The transcriptional network regulating antibody-secreting cell (ASC) differentiation has been extensively studied, but our current understanding is limited. The mechanisms of action of known “master” regulators are still unclear, while the participation of new factors is being revealed. Here, we identify Zbtb20, a Bcl6 homologue, as a novel regulator of late B cell development. Within the B cell lineage, Zbtb20 is specifically expressed in B1 and germinal center B cells and peaks in long-lived bone marrow (BM) ASCs. Unlike Bcl6, an inhibitor of ASC differentiation, ectopic Zbtb20 expression in primary B cells facilitates terminal B cell differentiation to ASCs. In plasma cell lines, Zbtb20 induces cell survival and blocks cell cycle progression. Immunized Zbtb20-deficient mice exhibit curtailed humoral responses and accelerated loss of antigen-specific plasma cells, specifically from the BM pool. Strikingly, Zbtb20 induction does not require Blimp1 but depends directly on Irf4, acting at a newly identified Zbtb20 promoter in ASCs. These results identify Zbtb20 as an important player in late B cell differentiation and provide new insights into this complex process.
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Affiliation(s)
- Stéphane Chevrier
- Molecular Immunology Division, 2 Bioinformatics Division, 3 Immunology Division, The Walter and Eliza Hall Institute, Parkville, Victoria 3052, Australia
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