1
|
Donohoe ME, Morey R, Li Y, Pizzo D, Kallol S, Cho HY, Soncin F, Parast MM. Identification of HTRA4 as a Transcriptional Target of p63 in Trophoblast. THE AMERICAN JOURNAL OF PATHOLOGY 2024; 194:1162-1170. [PMID: 38880601 PMCID: PMC11220921 DOI: 10.1016/j.ajpath.2024.03.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 03/12/2024] [Accepted: 03/27/2024] [Indexed: 06/18/2024]
Abstract
The placenta plays a crucial role in pregnancy success. ΔNp63α (p63), a transcription factor from the TP53 family, is highly expressed in villous cytotrophoblasts (CTBs), the epithelial stem cells of the human placenta, and is involved in CTB maintenance and differentiation. We examined the mechanisms of action of p63 by identifying its downstream targets. Gene expression changes were evaluated following overexpression and knockdown of p63 in the JEG3 choriocarcinoma cell line, using microarray-based RNA profiling. High-temperature requirement A4 (HTRA4), a placenta-specific serine protease involved in trophoblast differentiation and altered in preeclampsia, was identified as a gene reciprocally regulated by p63, and its expression was characterized in primary human placental tissues by RNA-sequencing and in situ hybridization. Potential p63 DNA-binding motifs were identified in the HTRA4 promoter, and p63 occupancy at some of these sites was confirmed using chromatin immunoprecipitation, followed by quantitative PCR in both JEG3 and trophoblast stem cells. These data begin to identify members of the transcriptional network downstream of p63, thus laying the groundwork for probing mechanisms by which this important transcription factor regulates trophoblast stemness and differentiation.
Collapse
Affiliation(s)
- Mary E Donohoe
- Department of Pathology, University of California San Diego, La Jolla, California; Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, California
| | - Robert Morey
- Department of Pathology, University of California San Diego, La Jolla, California; Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, California
| | - Yingchun Li
- Center for Genes, Environment, and Health, National Jewish Health, Denver, Colorado
| | - Donald Pizzo
- Department of Pathology, University of California San Diego, La Jolla, California
| | - Sampada Kallol
- Department of Pathology, University of California San Diego, La Jolla, California; Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, California
| | - Hee-Young Cho
- Department of Obstetrics and Gynecology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Francesca Soncin
- Department of Pathology, University of California San Diego, La Jolla, California; Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, California
| | - Mana M Parast
- Department of Pathology, University of California San Diego, La Jolla, California; Sanford Consortium for Regenerative Medicine, University of California San Diego, La Jolla, California.
| |
Collapse
|
2
|
Wang J, Jia W, zhou X, Ma Z, Liu J, Lan P. CBX4 suppresses CD8 + T cell antitumor immunity by reprogramming glycolytic metabolism. Theranostics 2024; 14:3793-3809. [PMID: 38994031 PMCID: PMC11234269 DOI: 10.7150/thno.95748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 06/08/2024] [Indexed: 07/13/2024] Open
Abstract
Rationale: CD8+ T cells undergo a series of metabolic reprogramming processes during their activation and proliferation, including increased glycolysis, decreased aerobic oxidation of sugars, increased amino acid metabolism and increased protein synthesis. However, it is still unclear what factors regulate these metabolic reprogramming processes in CD8+ T cells in the tumor immune microenvironment. Methods: T cell chromobox protein 4 (CBX4) knock-out mice models were used to determine the role of CBX4 in CD8+ T cells on the tumor immune microenvironment and tumor progression. Flow cytometry, Cut-Tag qPCR, Chip-seq, immunoprecipitation, metabolite detection, lentivirus infection and adoptive T cells transfer were performed to explore the underlying mechanisms of CBX4 knock-out in promoting CD8+ T cell activation and inhibiting tumor growth. Results: We found that CBX4 expression was induced in tumor-infiltrating CD8+ T cells and inhibited CD8+ T cell function by regulating glucose metabolism in tumor tissue. Mechanistically, CBX4 increases the expression of the metabolism-associated molecule aldolase B (Aldob) through sumoylation of trans-acting transcription factor 1 (SP1) and Krüppel-like factor 3 (KLF3). In addition, Aldob inhibits glycolysis and ATP synthesis in T cells by reducing the phosphorylation of the serine/threonine protein kinase (Akt) and ultimately suppresses CD8+ T cell function. Significantly, knocking out CBX4 may improve the efficacy of anti-PD-1 therapy by enhancing the function of CD8+ T cells in the tumor microenvironment. Conclusion: CBX4 is involved in CD8+ T cell metabolic reprogramming and functional persistence in tumor tissues, and serves as an inhibitor in CD8+ T cells' glycolysis and effector function.
Collapse
Affiliation(s)
- Jingzeng Wang
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, China
| | - Wenlong Jia
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Clinical Medical Research Center of Hepatic Surgery at Hubei Province, Wuhan, China
| | - Xi zhou
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, China
| | - Zhibo Ma
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, China
| | - Jing Liu
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, China
| | - Peixiang Lan
- Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, China
| |
Collapse
|
3
|
Kida M, Fatima I, Rozhkova E, Otero-Viñas M, Wu M, Kalin JH, Cole PA, Falanga V, Alani RM, Sharov AA. Inhibition of the CoREST Repressor Complex Promotes Wound Re-Epithelialization through the Regulation of Keratinocyte Migration. J Invest Dermatol 2024; 144:378-386.e2. [PMID: 37633457 PMCID: PMC10790709 DOI: 10.1016/j.jid.2023.07.022] [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: 04/27/2022] [Revised: 07/24/2023] [Accepted: 07/31/2023] [Indexed: 08/28/2023]
Abstract
Wound healing is a complex process involving phases of hemostasis, inflammation, proliferation, and remodeling. The regenerative process in the skin requires coordination between many regulators, including signaling molecules, transcription factors, and the epigenetic machinery. In this study, we show that chromatin regulators HDAC1 and LSD1, key components of the CoREST repressor complex, are upregulated in the regenerating epidermis during wound repair. We also show that corin, a synthetic dual inhibitor of the CoREST complex and HDAC1/LSD1 activities, significantly accelerates wound closure through enhanced re-epithelialization in a mouse tail wound model. Acetylated H3K9 (methylation of histone H3 at lysine 9) expression, a histone modification targeted by HDAC1, is increased in keratinocytes after topical treatment with 100 nM and 1 μM of corin. In vitro experiments demonstrate that corin promotes migration and inhibits the proliferation of human keratinocytes. Furthermore, expression levels of genes promoting keratinocyte migration, such as AREG, CD24, EPHB2, ITGAX, PTGS, SCT1, SERPINB2, SERPINE1, SLPI, SNAI2, and TWIST, increased in keratinocytes treated with corin. These data demonstrate that dual inhibition of class I histone deacetylases and LSD1 by corin may serve as a new approach for promoting wound re-epithelialization and provide a platform for further applications of corin for the treatment of chronic wounds.
Collapse
Affiliation(s)
- Maki Kida
- Department of Dermatology, Chobanian & Avedisian School of Medicine, Boston University, Boston, Massachusetts, USA
| | - Iqra Fatima
- Department of Dermatology, Chobanian & Avedisian School of Medicine, Boston University, Boston, Massachusetts, USA
| | - Elena Rozhkova
- Department of Dermatology, Chobanian & Avedisian School of Medicine, Boston University, Boston, Massachusetts, USA
| | - Marta Otero-Viñas
- Department of Dermatology, Chobanian & Avedisian School of Medicine, Boston University, Boston, Massachusetts, USA; The Tissue Repair and Regeneration Laboratory (TR2Lab), Faculty of Sciences and Technology, University of Vic - Central University of Catalonia, Vic, Spain
| | - Muzhou Wu
- Department of Dermatology, Chobanian & Avedisian School of Medicine, Boston University, Boston, Massachusetts, USA
| | - Jay H Kalin
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA; Department of Biological Chemistry and Molecular Pharmacology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Philip A Cole
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA; Department of Biological Chemistry and Molecular Pharmacology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Vincent Falanga
- Department of Dermatology, Chobanian & Avedisian School of Medicine, Boston University, Boston, Massachusetts, USA
| | - Rhoda M Alani
- Department of Dermatology, Chobanian & Avedisian School of Medicine, Boston University, Boston, Massachusetts, USA
| | - Andrey A Sharov
- Department of Dermatology, Chobanian & Avedisian School of Medicine, Boston University, Boston, Massachusetts, USA.
| |
Collapse
|
4
|
Li Y, Giovannini S, Wang T, Fang J, Li P, Shao C, Wang Y, Shi Y, Candi E, Melino G, Bernassola F. p63: a crucial player in epithelial stemness regulation. Oncogene 2023; 42:3371-3384. [PMID: 37848625 PMCID: PMC10638092 DOI: 10.1038/s41388-023-02859-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 09/26/2023] [Accepted: 10/02/2023] [Indexed: 10/19/2023]
Abstract
Epithelial tissue homeostasis is closely associated with the self-renewal and differentiation behaviors of epithelial stem cells (ESCs). p63, a well-known marker of ESCs, is an indispensable factor for their biological activities during epithelial development. The diversity of p63 isoforms expressed in distinct tissues allows this transcription factor to have a wide array of effects. p63 coordinates the transcription of genes involved in cell survival, stem cell self-renewal, migration, differentiation, and epithelial-to-mesenchymal transition. Through the regulation of these biological processes, p63 contributes to, not only normal epithelial development, but also epithelium-derived cancer pathogenesis. In this review, we provide an overview of the role of p63 in epithelial stemness regulation, including self-renewal, differentiation, proliferation, and senescence. We describe the differential expression of TAp63 and ΔNp63 isoforms and their distinct functional activities in normal epithelial tissues and in epithelium-derived tumors. Furthermore, we summarize the signaling cascades modulating the TAp63 and ΔNp63 isoforms as well as their downstream pathways in stemness regulation.
Collapse
Affiliation(s)
- Yanan Li
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133, Rome, Italy
- The Third Affiliated Hospital of Soochow University, Institutes for Translational Medicine, Soochow University, Suzhou, 215000, China
| | - Sara Giovannini
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133, Rome, Italy
| | - Tingting Wang
- The Third Affiliated Hospital of Soochow University, Institutes for Translational Medicine, Soochow University, Suzhou, 215000, China
| | - Jiankai Fang
- The Third Affiliated Hospital of Soochow University, Institutes for Translational Medicine, Soochow University, Suzhou, 215000, China
| | - Peishan Li
- The Third Affiliated Hospital of Soochow University, Institutes for Translational Medicine, Soochow University, Suzhou, 215000, China
| | - Changshun Shao
- The Third Affiliated Hospital of Soochow University, Institutes for Translational Medicine, Soochow University, Suzhou, 215000, China
| | - Ying Wang
- Shanghai Institute of Nutrition and Health, Shanghai, 200031, China
| | - Yufang Shi
- The Third Affiliated Hospital of Soochow University, Institutes for Translational Medicine, Soochow University, Suzhou, 215000, China.
| | - Eleonora Candi
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133, Rome, Italy.
- Biochemistry Laboratory, Istituto Dermopatico Immacolata (IDI-IRCCS), 00100, Rome, Italy.
| | - Gerry Melino
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133, Rome, Italy.
| | - Francesca Bernassola
- Department of Experimental Medicine, TOR, University of Rome Tor Vergata, 00133, Rome, Italy.
| |
Collapse
|
5
|
Chen YH, Zhang X, Attarian D, Kraus VB. Synergistic roles of CBX4 chromo and SIM domains in regulating senescence of primary human osteoarthritic chondrocytes. Arthritis Res Ther 2023; 25:197. [PMID: 37828576 PMCID: PMC10568837 DOI: 10.1186/s13075-023-03183-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 10/03/2023] [Indexed: 10/14/2023] Open
Abstract
BACKGROUND Cellular senescence is a critical factor contributing to osteoarthritis (OA). Overexpression of chromobox homolog 4 (CBX4) in a mouse system was demonstrated to alleviate post-traumatic osteoarthritis (PTOA) by reducing cellular senescence. Additionally, replicative cellular senescence of WI-38 fibroblasts can be attenuated by CBX4. However, the mechanisms underlying this senomorphic function of CBX4 are not fully understood. In this study, we aimed to investigate the role of CBX4 in cellular senescence in human primary osteoarthritic chondrocytes and to identify the functional domains of CBX4 necessary for its function in modulating senescence. METHODS Chondrocytes, isolated from 6 individuals undergoing total knee replacement for OA, were transduced with wild-type CBX4, mutant CBX4, and control lentiviral constructs. Senescence-related phenotypic outcomes included the following: multiple flow cytometry-measured markers (p16INK4A, senescence-associated β-galactosidase [SA-β-gal] activity and dipeptidyl peptidase-4 [DPP4], and proliferation marker EdU), multiplex ELISA-measured markers in chondrocyte culture media (senescence-associated secretory phenotypes [SASPs], including IL-1β, IL-6, IL-8, TNF-α, MMP-1, MMP-3, and MMP-9), and PCR array-evaluated senescence-related genes. RESULTS Compared with control, CBX4 overexpression in OA chondrocytes decreased DPP4 expression and SASP secretion and increased chondrocyte proliferation confirming CBX4 senomorphic effects on primary human chondrocytes. Point mutations of the chromodomain domain (CDM, involved in chromatin modification) alone were sufficient to partially block the senomorphic activity of CBX4 (p16INK4A and DPP4 increased, and EdU decreased) but had minimal effect on SASP secretion. Although having no effect on p16INK4A, DPP4, and EdU, deletion of two small-ubiquitin-like-modifier-interaction motifs (CBX4 ΔSIMs) led to increased SASP secretion (IL-1β, TNF-α, IL-8). The combination CBX4 CDMΔSIMs altered all these measures adversely and to a greater degree than the single domain mutants. Deletion of the C-terminal (CBX4 ΔC-box) involved with transcriptional silencing of polycomb group proteins increased IL-1β slightly but significantly but altered none of the other senescence outcome measures. CONCLUSIONS CBX4 has a senomorphic effect on human osteoarthritic chondrocytes. CDM is critical for CBX4-mediated regulation of senescence. The SIMs are supportive but not indispensable for CBX4 senomorphic function while the C-box is dispensable.
Collapse
Affiliation(s)
- Yu-Hsiu Chen
- Duke Molecular Physiology Institute, Duke University, 300 N Duke St, Durham, NC, 27701, USA
- Division of Rheumatology/Immunology/Allergy, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, ROC
- Department of Pathology, Duke University Medical Center, Durham, NC, USA
| | - Xin Zhang
- Duke Molecular Physiology Institute, Duke University, 300 N Duke St, Durham, NC, 27701, USA
- Department of Orthopaedic Surgery, Duke University, Durham, NC, USA
| | - David Attarian
- Department of Orthopaedic Surgery, Duke University, Durham, NC, USA
| | - Virginia Byers Kraus
- Duke Molecular Physiology Institute, Duke University, 300 N Duke St, Durham, NC, 27701, USA.
- Department of Pathology, Duke University Medical Center, Durham, NC, USA.
- Department of Orthopaedic Surgery, Duke University, Durham, NC, USA.
- Department of Medicine, Duke University School of Medicine, Durham, NC, USA.
| |
Collapse
|
6
|
Chen F, Hou W, Yu X, Wu J, Li Z, Xu J, Deng Z, Chen G, Liu B, Yin X, Yu W, Zhang L, Xu G, Ji H, Liang C, Wang Z. CBX4 deletion promotes tumorigenesis under Kras G12D background by inducing genomic instability. Signal Transduct Target Ther 2023; 8:343. [PMID: 37696812 PMCID: PMC10495400 DOI: 10.1038/s41392-023-01623-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 08/03/2023] [Accepted: 08/22/2023] [Indexed: 09/13/2023] Open
Abstract
Chromobox protein homolog 4 (CBX4) is a component of the Polycomb group (PcG) multiprotein Polycomb repressive complexes 1 (PRC1), which is participated in several processes including growth, senescence, immunity, and tissue repair. CBX4 has been shown to have diverse, even opposite functions in different types of tissue and malignancy in previous studies. In this study, we found that CBX4 deletion promoted lung adenocarcinoma (LUAD) proliferation and progression in KrasG12D mutated background. In vitro, over 50% Cbx4L/L, KrasG12D mouse embryonic fibroblasts (MEFs) underwent apoptosis in the initial period after Adeno-Cre virus treatment, while a small portion of survival cells got increased proliferation and transformation abilities, which we called selected Cbx4-/-, KrasG12D cells. Karyotype analysis and RNA-seq data revealed chromosome instability and genome changes in selected Cbx4-/-, KrasG12D cells compared with KrasG12D cells. Further study showed that P15, P16 and other apoptosis-related genes were upregulated in the primary Cbx4-/-, KrasG12D cells due to chromosome instability, which led to the large population of cell apoptosis. In addition, multiple pathways including Hippo pathway and basal cell cancer-related signatures were altered in selected Cbx4-/-, KrasG12D cells, ultimately leading to cancer. We also found that low expression of CBX4 in LUAD was associated with poorer prognosis under Kras mutation background from the human clinical data. To sum up, CBX4 deletion causes genomic instability to induce tumorigenesis under KrasG12D background. Our study demonstrates that CBX4 plays an emerging role in tumorigenesis, which is of great importance in guiding the clinical treatment of lung adenocarcinoma.
Collapse
Affiliation(s)
- Fangzhen Chen
- Department of Human Anatomy and Histoembryology, School of Basic Medical Sciences and Shanghai Xuhui Central Hospital, Shanghai Medical College, Fudan University, Shanghai, 200030, China
| | - Wulei Hou
- Shanghai Xuhui Central Hospital, Zhongshan-Xuhui Hospital, Fudan University, Shanghai, 200031, China
| | - Xiangtian Yu
- Clinical Research Center, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Jing Wu
- Department of Human Anatomy and Histoembryology, School of Basic Medical Sciences and Shanghai Xuhui Central Hospital, Shanghai Medical College, Fudan University, Shanghai, 200030, China
| | - Zhengda Li
- Department of Human Anatomy and Histoembryology, School of Basic Medical Sciences and Shanghai Xuhui Central Hospital, Shanghai Medical College, Fudan University, Shanghai, 200030, China
| | - Jietian Xu
- Department of Human Anatomy and Histoembryology, School of Basic Medical Sciences and Shanghai Xuhui Central Hospital, Shanghai Medical College, Fudan University, Shanghai, 200030, China
| | - Zimu Deng
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai, China
| | - Gaobin Chen
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai, China
| | - Bo Liu
- CAS Key Laboratory of Molecular Virology and Immunology, Institute Pasteur of Shanghai, Chinese Academy of Sciences, Shanghai, China
| | - Xiaoxing Yin
- Department of General Surgery, Jing'an District Central Hospital of Shanghai, Fudan University, Shanghai, China
| | - Wei Yu
- Key Laboratory of Respiratory Disease, People's Hospital of Yangjiang, Yangjiang, Guangdong, China
| | - Lei Zhang
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai, China
| | - Guoliang Xu
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai, China
| | - Hongbin Ji
- State Key Laboratory of Cell Biology, CAS Center for Excellence in Molecular Cell Science, Shanghai Institute of Biochemistry and Cell Biology, Chinese Academy of Sciences, Shanghai, China
| | - Chunmin Liang
- Department of Human Anatomy and Histoembryology, School of Basic Medical Sciences and Shanghai Xuhui Central Hospital, Shanghai Medical College, Fudan University, Shanghai, 200030, China.
| | - Zuoyun Wang
- Department of Human Anatomy and Histoembryology, School of Basic Medical Sciences and Shanghai Xuhui Central Hospital, Shanghai Medical College, Fudan University, Shanghai, 200030, China.
| |
Collapse
|
7
|
Zhang Y, Karagiannis D, Liu H, Lin M, Fang Y, Jiang M, Chen X, Suresh S, Huang H, She J, Shi F, Yang P, El-Rifai W, Zaika A, Oro AE, Rustgi AK, Wang TC, Lu C, Que J. Epigenetic regulation of p63 blocks squamous-to-neuroendocrine transdifferentiation in esophageal development and malignancy. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.09.556982. [PMID: 37745439 PMCID: PMC10515764 DOI: 10.1101/2023.09.09.556982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
While cell fate determination and maintenance are important in establishing and preserving tissue identity and function during development, aberrant cell fate transition leads to cancer cell heterogeneity and resistance to treatment. Here, we report an unexpected role for the transcription factor p63 (Trp63/TP63) in the fate choice of squamous versus neuroendocrine lineage in esophageal development and malignancy. Deletion of p63 results in extensive neuroendocrine differentiation in the developing mouse esophagus and esophageal progenitors derived from human embryonic stem cells. In human esophageal neuroendocrine carcinoma (eNEC) cells, p63 is transcriptionally silenced by EZH2-mediated H3K27 trimethylation (H3K27me3). Upregulation of the major p63 isoform ΔNp63α, through either ectopic expression or EZH2 inhibition, promotes squamous transdifferentiation of eNEC cells. Together these findings uncover p63 as a rheostat in coordinating the transition between squamous and neuroendocrine cell fates during esophageal development and tumor progression.
Collapse
|
8
|
Chen C, Zeng J, Lu J. Critical role of epigenetic modification in the pathogenesis of atopic dermatitis. Indian J Dermatol Venereol Leprol 2023; 89:700-709. [PMID: 37067130 DOI: 10.25259/ijdvl_298_2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 10/24/2022] [Indexed: 03/31/2023]
Abstract
Atopic dermatitis is a chronic inflammatory skin disease characterised by recurrent eczema-like lesions and severe pruritus, along with drying and decrustation of skin. Current research relates the pathogenesis of atopic dermatitis mainly to genetic susceptibility, abnormal skin barrier function, immune disorders, Staphylococcus aureus colonisation, microbiological dysfunction and vitamin D insufficiency. Epigenetic modifications are distinct genetic phenotypes resulting from environment-driven changes in chromosome functions in the absence of nuclear DNA sequence variation. Classic epigenetic events include DNA methylation, histone protein modifications and non-coding RNA regulation. Increasing evidence has indicated that epigenetic events are involved in the pathogenesis of atopic dermatitis by their effects on multiple signalling pathways which in turn influence the above factors. This review primarily analyses the function of epigenetic regulation in the pathogenesis of atopic dermatitis. In addition, it tries to make recommendations for personalised epigenetic treatment strategies for atopic dermatitis in the future.
Collapse
Affiliation(s)
- Chunli Chen
- Department of Dermatology, the Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jinrong Zeng
- Department of Dermatology, the Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jianyun Lu
- Department of Dermatology, the Third Xiangya Hospital, Central South University, Changsha, Hunan, China
| |
Collapse
|
9
|
Aghagolzadeh P, Plaisance I, Bernasconi R, Treibel TA, Pulido Quetglas C, Wyss T, Wigger L, Nemir M, Sarre A, Chouvardas P, Johnson R, González A, Pedrazzini T. Assessment of the Cardiac Noncoding Transcriptome by Single-Cell RNA Sequencing Identifies FIXER, a Conserved Profibrogenic Long Noncoding RNA. Circulation 2023; 148:778-797. [PMID: 37427428 DOI: 10.1161/circulationaha.122.062601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 06/02/2023] [Indexed: 07/11/2023]
Abstract
BACKGROUND Cardiac fibroblasts have crucial roles in the heart. In particular, fibroblasts differentiate into myofibroblasts in the damaged myocardium, contributing to scar formation and interstitial fibrosis. Fibrosis is associated with heart dysfunction and failure. Myofibroblasts therefore represent attractive therapeutic targets. However, the lack of myofibroblast-specific markers has precluded the development of targeted therapies. In this context, most of the noncoding genome is transcribed into long noncoding RNAs (lncRNAs). A number of lncRNAs have pivotal functions in the cardiovascular system. lncRNAs are globally more cell-specific than protein-coding genes, supporting their importance as key determinants of cell identity. METHODS In this study, we evaluated the value of the lncRNA transcriptome in very deep single-cell RNA sequencing. We profiled the lncRNA transcriptome in cardiac nonmyocyte cells after infarction and probed heterogeneity in the fibroblast and myofibroblast populations. In addition, we searched for subpopulation-specific markers that can constitute novel targets in therapy for heart disease. RESULTS We demonstrated that cardiac cell identity can be defined by the sole expression of lncRNAs in single-cell experiments. In this analysis, we identified lncRNAs enriched in relevant myofibroblast subpopulations. Selecting 1 candidate we named FIXER (fibrogenic LOX-locus enhancer RNA), we showed that its silencing limits fibrosis and improves heart function after infarction. Mechanitically, FIXER interacts with CBX4, an E3 SUMO protein ligase and transcription factor, guiding CBX4 to the promoter of the transcription factor RUNX1 to control its expression and, consequently, the expression of a fibrogenic gene program.. FIXER is conserved in humans, supporting its translational value. CONCLUSIONS Our results demonstrated that lncRNA expression is sufficient to identify the various cell types composing the mammalian heart. Focusing on cardiac fibroblasts and their derivatives, we identified lncRNAs uniquely expressed in myofibroblasts. In particular, the lncRNA FIXER represents a novel therapeutic target for cardiac fibrosis.
Collapse
Affiliation(s)
- Parisa Aghagolzadeh
- Experimental Cardiology Unit, Division of Cardiology, Department of Cardiovascular Medicine, University of Lausanne Medical School, Switzerland (P.A., I.P., R.B., M.N., T.P.)
| | - Isabelle Plaisance
- Experimental Cardiology Unit, Division of Cardiology, Department of Cardiovascular Medicine, University of Lausanne Medical School, Switzerland (P.A., I.P., R.B., M.N., T.P.)
| | - Riccardo Bernasconi
- Experimental Cardiology Unit, Division of Cardiology, Department of Cardiovascular Medicine, University of Lausanne Medical School, Switzerland (P.A., I.P., R.B., M.N., T.P.)
| | - Thomas A Treibel
- Institute of Cardiovascular Sciences, University College London, United Kingdom (T.A.T.)
| | - Carlos Pulido Quetglas
- Department for BioMedical Research, University of Bern, Switzerland (C.P.Q., P.C., R.J.)
| | - Tania Wyss
- Department of Oncology, Ludwig Institute for Cancer Research, University of Lausanne, Epalinges, Switzerland (T.W.)
- Swiss Institute of Bioinformatics, Lausanne, Switzerland (T.W., L.W.)
| | - Leonore Wigger
- Swiss Institute of Bioinformatics, Lausanne, Switzerland (T.W., L.W.)
| | - Mohamed Nemir
- Experimental Cardiology Unit, Division of Cardiology, Department of Cardiovascular Medicine, University of Lausanne Medical School, Switzerland (P.A., I.P., R.B., M.N., T.P.)
| | - Alexandre Sarre
- Cardiovascular Assessment Facility, University of Lausanne, Switzerland (A.S.)
| | - Panagiotis Chouvardas
- Department for BioMedical Research, University of Bern, Switzerland (C.P.Q., P.C., R.J.)
| | - Rory Johnson
- Department for BioMedical Research, University of Bern, Switzerland (C.P.Q., P.C., R.J.)
| | - Arantxa González
- Program of Cardiovascular Diseases, CIMA Universidad de Navarra and IdiSNA, Pamplona, Spain (A.G.)
- CIBERCV, Madrid, Spain (A.G.)
| | - Thierry Pedrazzini
- Experimental Cardiology Unit, Division of Cardiology, Department of Cardiovascular Medicine, University of Lausanne Medical School, Switzerland (P.A., I.P., R.B., M.N., T.P.)
| |
Collapse
|
10
|
Fisher ML, Balinth S, Hwangbo Y, Wu C, Ballon C, Goldberg GL, Mills AA. Cancer-associated fibroblasts promote cancer stemness by inducing expression of the chromatin-modifying protein CBX4 in squamous cell carcinoma. Carcinogenesis 2023; 44:485-496. [PMID: 37463322 PMCID: PMC10436759 DOI: 10.1093/carcin/bgad048] [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: 03/20/2023] [Revised: 06/07/2023] [Accepted: 07/06/2023] [Indexed: 07/20/2023] Open
Abstract
The chromobox-containing protein CBX4 is an important regulator of epithelial cell proliferation and differentiation, and has been implicated in several cancer types. The cancer stem cell (CSC) population is a key driver of metastasis and recurrence. The undifferentiated, plastic state characteristic of CSCs relies on cues from the microenvironment. Cancer-associated fibroblasts (CAFs) are a major component of the microenvironment that can influence the CSC population through the secretion of extracellular matrix and a variety of growth factors. Here we show CBX4 is a critical regulator of the CSC phenotype in squamous cell carcinomas of the skin and hypopharynx. Moreover, CAFs can promote the expression of CBX4 in the CSC population through the secretion of interleukin-6 (IL-6). IL-6 activates JAK/STAT3 signaling to increase ∆Np63α-a key transcription factor that is essential for epithelial stem cell function and the maintenance of proliferative potential that is capable of regulating CBX4. Targeting the JAK/STAT3 axis or CBX4 directly suppresses the aggressive phenotype of CSCs and represents a novel opportunity for therapeutic intervention.
Collapse
Affiliation(s)
- Matthew L Fisher
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA
| | - Seamus Balinth
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA
- Molecular and Cellular Biology Program, Stony Brook University, Stony Brook, NY 11794, USA
| | - Yon Hwangbo
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA
| | - Caizhi Wu
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA
| | - Carlos Ballon
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA
| | - Gary L Goldberg
- Zucker School of Medicine, Hofstra University/Northwell Health, Hempstead, NY 11549, USA
| | - Alea A Mills
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY 11724, USA
| |
Collapse
|
11
|
Nayak S, Jiang K, Hope E, Cross M, Overmiller A, Naz F, Worrell S, Bajpai D, Hasneen K, Brooks SR, Dell'Orso S, Morasso MI. Chromatin Landscape Governing Murine Epidermal Differentiation. J Invest Dermatol 2023; 143:1220-1232.e9. [PMID: 36708949 PMCID: PMC10293054 DOI: 10.1016/j.jid.2022.12.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 11/16/2022] [Accepted: 12/12/2022] [Indexed: 01/27/2023]
Abstract
Chromatin landscape and regulatory networks are determinants in lineage specification and differentiation. To define the temporospatial differentiation axis in murine epidermal cells in vivo, we generated datasets profiling expression dynamics (RNA sequencing), chromatin accessibility (assay for transposase-accessible chromatin using sequencing), architecture (Hi-C), and histone modifications (chromatin immunoprecipitation followed by sequencing) in the epidermis. We show that many differentially regulated genes are suppressed during the differentiation process, with superenhancers controlling differentiation-specific epigenomic changes. Our data shows the relevance of the Dlx/Klf/Grhl combinatorial regulatory network in maintaining correct temporospatial gene expression during epidermal differentiation. We determined differential open compartments, topologically associating domain score, and looping in the basal cell and suprabasal cell epidermal fractions, with the evolutionarily conserved epidermal differentiation complex region showing distinct suprabasal cell-specific topologically associating domain and loop formation that coincided with superenhancer sites. Overall, our study provides a global genome-wide resource of chromatin dynamics that define unrecognized regulatory networks and the epigenetic control of Dlx3-bound superenhancer elements during epidermal differentiation.
Collapse
Affiliation(s)
- Subhashree Nayak
- Laboratory of Skin Biology, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Kan Jiang
- Biodata Mining and Discovery Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Emma Hope
- Laboratory of Skin Biology, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Michael Cross
- Laboratory of Skin Biology, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Andrew Overmiller
- Laboratory of Skin Biology, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Faiza Naz
- Genomic Technology Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Stephen Worrell
- Laboratory of Skin Biology, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Deepti Bajpai
- Laboratory of Skin Biology, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Kowser Hasneen
- Laboratory of Skin Biology, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Stephen R Brooks
- Biodata Mining and Discovery Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Stefania Dell'Orso
- Genomic Technology Section, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA
| | - Maria I Morasso
- Laboratory of Skin Biology, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, Maryland, USA.
| |
Collapse
|
12
|
Botchkarev VA, Fessing MY, Sharov AA. Deciphering a Message from the Nucleus: How Transcription Factors and Spatial Chromatin Interactions Orchestrate Epidermal Differentiation. J Invest Dermatol 2023; 143:1117-1120. [PMID: 37045617 PMCID: PMC10715816 DOI: 10.1016/j.jid.2023.02.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 02/14/2023] [Indexed: 04/14/2023]
Affiliation(s)
- Vladimir A Botchkarev
- Department of Dermatology, Boston University School of Medicine, Boston, Massachusetts, USA.
| | - Michael Y Fessing
- Centre for Skin Sciences, School of Chemistry and Biosciences, University of Bradford, West Yorkshire, United Kingdom
| | - Andrey A Sharov
- Department of Dermatology, Boston University School of Medicine, Boston, Massachusetts, USA
| |
Collapse
|
13
|
Fatima I, Chen G, Botchkareva NV, Sharov AA, Thornton D, Wilkinson HN, Hardman MJ, Grutzkau A, Pedro de Magalhaes J, Seluanov A, Smith ESJ, Gorbunova V, Mardaryev AN, Faulkes CG, Botchkarev VA. Skin Aging in Long-Lived Naked Mole-Rats Is Accompanied by Increased Expression of Longevity-Associated and Tumor Suppressor Genes. J Invest Dermatol 2022; 142:2853-2863.e4. [PMID: 35691364 PMCID: PMC9613526 DOI: 10.1016/j.jid.2022.04.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 04/26/2022] [Accepted: 04/26/2022] [Indexed: 10/31/2022]
Abstract
Naked mole-rats (NMRs) (Heterocephalus glaber) are long-lived mammals that possess a natural resistance to cancer and other age-related pathologies, maintaining a healthy life span >30 years. In this study, using immunohistochemical and RNA-sequencing analyses, we compare skin morphology, cellular composition, and global transcriptome signatures between young and aged (aged 3‒4 vs. 19‒23 years, respectively) NMRs. We show that similar to aging in human skin, aging in NMRs is accompanied by a decrease in epidermal thickness; keratinocyte proliferation; and a decline in the number of Merkel cells, T cells, antigen-presenting cells, and melanocytes. Similar to that in human skin aging, expression levels of dermal collagens are decreased, whereas matrix metalloproteinase 9 and matrix metalloproteinase 11 levels increased in aged versus in young NMR skin. RNA-sequencing analyses reveal that in contrast to human or mouse skin aging, the transcript levels of several longevity-associated (Igfbp3, Igf2bp3, Ing2) and tumor-suppressor (Btg2, Cdkn1a, Cdkn2c, Dnmt3a, Hic1, Socs3, Sfrp1, Sfrp5, Thbs1, Tsc1, Zfp36) genes are increased in aged NMR skin. Overall, these data suggest that specific features in the NMR skin aging transcriptome might contribute to the resistance of NMRs to spontaneous skin carcinogenesis and provide a platform for further investigations of NMRs as a model organism for studying the biology and disease resistance of human skin.
Collapse
Affiliation(s)
- Iqra Fatima
- Centre for Skin Sciences, Faculty of Life Sciences, University of Bradford, Bradford, United Kingdom
| | - Guodong Chen
- Department of Dermatology, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Natalia V Botchkareva
- Department of Dermatology, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Andrey A Sharov
- Department of Dermatology, Boston University School of Medicine, Boston, Massachusetts, USA
| | - Daniel Thornton
- Genomics of Aging and Rejuvenation Laboratory, Institute of Life Course and Medical Sciences, Univeristy of Liverpool, Liverpool, United Kingdom
| | - Holly N Wilkinson
- Centre for Atherothrombosis and Metabolic Disease, Hull York Medical School, University of Hull, Hull, United Kingdom
| | - Matthew J Hardman
- Centre for Atherothrombosis and Metabolic Disease, Hull York Medical School, University of Hull, Hull, United Kingdom
| | - Andreas Grutzkau
- Deutsches Rheuma-Forschungszentrum Berlin, Institute of the Leibniz Association, Berlin, Germany
| | - Joao Pedro de Magalhaes
- Genomics of Aging and Rejuvenation Laboratory, Institute of Life Course and Medical Sciences, Univeristy of Liverpool, Liverpool, United Kingdom
| | - Andrei Seluanov
- Department of Biology, School of Arts & Sciences, University of Rochester, Rochester, New York, USA; Department of Medicine, School of Medicine and Dentistry, University of Rochester, Rochester, New York, USA
| | - Ewan St J Smith
- Department of Pharmacology, University of Cambridge, Cambridge, United Kingdom
| | - Vera Gorbunova
- Department of Biology, School of Arts & Sciences, University of Rochester, Rochester, New York, USA; Department of Medicine, School of Medicine and Dentistry, University of Rochester, Rochester, New York, USA
| | - Andrei N Mardaryev
- Centre for Skin Sciences, Faculty of Life Sciences, University of Bradford, Bradford, United Kingdom
| | - Chris G Faulkes
- School of Biological and Behavioural Sciences, Queen Mary University of London, London, United Kingdom
| | - Vladimir A Botchkarev
- Department of Dermatology, Boston University School of Medicine, Boston, Massachusetts, USA.
| |
Collapse
|
14
|
Distinct interactors define the p63 transcriptional signature in epithelial development or cancer. Biochem J 2022; 479:1375-1392. [PMID: 35748701 PMCID: PMC9250260 DOI: 10.1042/bcj20210737] [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: 04/05/2022] [Revised: 06/01/2022] [Accepted: 06/06/2022] [Indexed: 11/24/2022]
Abstract
The TP63 is an indispensable transcription factor for development and homeostasis of epithelia and its derived glandular tissue. It is also involved in female germline cell quality control, muscle and thymus development. It is expressed as multiple isoforms transcribed by two independent promoters, in addition to alternative splicing occurring at the mRNA 3′-UTR. Expression of the TP63 gene, specifically the amino-deleted p63 isoform, ΔNp63, is required to regulate numerous biological activities, including lineage specification, self-renewal capacity of epithelial stem cells, proliferation/expansion of basal keratinocytes, differentiation of stratified epithelia. In cancer, ΔNp63 is implicated in squamous cancers pathogenesis of different origin including skin, head and neck and lung and in sustaining self-renewal of cancer stem cells. How this transcription factor can control such a diverse set of biological pathways is central to the understanding of the molecular mechanisms through which p63 acquires oncogenic activity, profoundly changing its down-stream transcriptional signature. Here, we highlight how different proteins interacting with p63 allow it to regulate the transcription of several central genes. The interacting proteins include transcription factors/regulators, epigenetic modifiers, and post-transcriptional modifiers. Moreover, as p63 depends on its interactome, we discuss the hypothesis to target the protein interactors to directly affect p63 oncogenic activities and p63-related diseases.
Collapse
|
15
|
Molecular Mechanisms of Cutaneous Squamous Cell Carcinoma. Int J Mol Sci 2022; 23:ijms23073478. [PMID: 35408839 PMCID: PMC8998533 DOI: 10.3390/ijms23073478] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/18/2022] [Accepted: 03/18/2022] [Indexed: 12/25/2022] Open
Abstract
Non-melanoma skin cancers are cutaneous malignancies representing the most common form of cancer in the United States. They are comprised predominantly of basal cell carcinomas and squamous cell carcinomas (cSCC). The incidence of cSCC is increasing, resulting in substantial morbidity and ever higher treatment costs; currently in excess of one billion dollars, per annum. Here, we review research defining the molecular basis and development of cSCC that aims to provide new insights into pathogenesis and drive the development of novel, cost and morbidity saving therapies.
Collapse
|
16
|
ΔNp63-Senataxin circuit controls keratinocyte differentiation by promoting the transcriptional termination of epidermal genes. Proc Natl Acad Sci U S A 2022; 119:e2104718119. [PMID: 35235452 PMCID: PMC8915885 DOI: 10.1073/pnas.2104718119] [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] [Indexed: 12/26/2022] Open
Abstract
ΔNp63 is a master regulator of skin homeostasis since it finely controls keratinocyte differentiation and proliferation. Here, we provide cellular and molecular evidence demonstrating the functional role of a ΔNp63 interactor, the R-loop–resolving enzyme Senataxin (SETX), in fine-tuning keratinocyte differentiation. We found that SETX physically binds the p63 DNA–binding motif present in two early epidermal differentiation genes, Keratin 1 (KRT1) and ZNF750, facilitating R-loop removal over their 3′ ends and thus allowing efficient transcriptional termination and gene expression. These molecular events translate into the inability of SETX-depleted keratinocytes to undergo the correct epidermal differentiation program. Remarkably, SETX is dysregulated in cutaneous squamous cell carcinoma, suggesting its potential involvement in the pathogenesis of skin disorders. ΔNp63, a master regulator of epithelial biology, is involved in regulating epithelial stem cell function, maintaining the integrity of stratified epithelial cells, and committing epidermal cells to the differentiation program. To this end, ΔNp63 exploits several direct mechanisms. Here, we elucidated a mechanism whereby ΔNp63 efficiently sustains the expression of epidermal differentiation genes. We show that ΔNp63 interacts with Senataxin (SETX), an RNA/DNA helicase able to resolve the R-loop intermediates over the GC-rich termination sites of coding genes. Notably, we found that SETX and ΔNp63 coregulate a subset of genes involved in the early step of the keratinocyte differentiation program. At the molecular level, SETX physically binds the p63 DNA–binding motifs present in two early epidermal differentiation genes, Keratin 1 (KRT1) and ZNF750, facilitating R-loop removal over their 3′ ends and thus promoting efficient transcriptional termination and gene expression. Remarkably, SETX loss affects the activation of the proper epidermal differentiation program in vitro and impacts epidermal layer stratification in organotypic human skin. Furthermore, we found that SETX is mutated or downmodulated in squamous cell carcinoma (SCC), and SETX gene mutation is a negative prognostic factor for cutaneous SCC patient survival. Collectively, our results unveil SETX as a molecular player of skin homeostasis potentially involved in hyperproliferative skin disorders.
Collapse
|
17
|
Martinez-Ruíz GU, Morales-Sánchez A, Bhandoola A. Transcriptional and epigenetic regulation in thymic epithelial cells. Immunol Rev 2022; 305:43-58. [PMID: 34750841 PMCID: PMC8766885 DOI: 10.1111/imr.13034] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/22/2021] [Accepted: 10/26/2021] [Indexed: 01/03/2023]
Abstract
The thymus is required for the development of both adaptive and innate-like T cell subsets. There is keen interest in manipulating thymic function for therapeutic purposes in circumstances of autoimmunity, immunodeficiency, and for purposes of immunotherapy. Within the thymus, thymic epithelial cells play essential roles in directing T cell development. Several transcription factors are known to be essential for thymic epithelial cell development and function, and a few transcription factors have been studied in considerable detail. However, the role of many other transcription factors is less well understood. Further, it is likely that roles exist for other transcription factors not yet known to be important in thymic epithelial cells. Recent progress in understanding of thymic epithelial cell heterogeneity has provided some new insight into transcriptional requirements in subtypes of thymic epithelial cells. However, it is unknown whether progenitors of thymic epithelial cells exist in the adult thymus, and consequently, developmental relationships linking putative precursors with differentiated cell types are poorly understood. While we do not presently possess a clear understanding of stage-specific requirements for transcription factors in thymic epithelial cells, new single-cell transcriptomic and epigenomic technologies should enable rapid progress in this field. Here, we review our current knowledge of transcription factors involved in the development, maintenance, and function of thymic epithelial cells, and the mechanisms by which they act.
Collapse
Affiliation(s)
- Gustavo Ulises Martinez-Ruíz
- T Cell Biology and Development Unit, Laboratory of Genome Integrity, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
- Research Division, Faculty of Medicine, National Autonomous University of Mexico, Mexico City, Mexico
- Children’s Hospital of Mexico Federico Gomez, Mexico City, Mexico
| | - Abigail Morales-Sánchez
- T Cell Biology and Development Unit, Laboratory of Genome Integrity, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
- Children’s Hospital of Mexico Federico Gomez, Mexico City, Mexico
| | - Avinash Bhandoola
- T Cell Biology and Development Unit, Laboratory of Genome Integrity, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| |
Collapse
|
18
|
Giordano I, Pirone L, Muratore V, Landaluze E, Pérez C, Lang V, Garde-Lapido E, Gonzalez-Lopez M, Barroso-Gomila O, Vertegaal ACO, Aransay AM, Rodriguez JA, Rodriguez MS, Sutherland JD, Barrio R. SALL1 Modulates CBX4 Stability, Nuclear Bodies, and Regulation of Target Genes. Front Cell Dev Biol 2021; 9:715868. [PMID: 34621739 PMCID: PMC8490708 DOI: 10.3389/fcell.2021.715868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 08/30/2021] [Indexed: 11/16/2022] Open
Abstract
Development is orchestrated through a complex interplay of multiple transcription factors. The comprehension of this interplay will help us to understand developmental processes. Here we analyze the relationship between two key transcription factors: CBX4, a member of the Polycomb Repressive Complex 1 (PRC1), and SALL1, a member of the Spalt-like family with important roles in embryogenesis and limb development. Both proteins localize to nuclear bodies and are modified by the small ubiquitin-like modifier (SUMO). Our results show that CBX4 and SALL1 interact in the nucleoplasm and that increased SALL1 expression reduces ubiquitination of CBX4, enhancing its stability. This is accompanied by an increase in the number and size of CBX4-containing Polycomb bodies, and by a greater repression of CBX4 target genes. Thus, our findings uncover a new way of SALL1-mediated regulation of Polycomb bodies through modulation of CBX4 stability, with consequences in the regulation of its target genes, which could have an impact in cell differentiation and development.
Collapse
Affiliation(s)
- Immacolata Giordano
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance, Derio, Spain
| | - Lucia Pirone
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance, Derio, Spain
| | - Veronica Muratore
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance, Derio, Spain
| | - Eukene Landaluze
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance, Derio, Spain
| | - Coralia Pérez
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance, Derio, Spain
| | - Valerie Lang
- Viralgen Vector Core, Parque Científico y Tecnológico de Guipúzcoa, San Sebastián, Spain
| | - Elisa Garde-Lapido
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance, Derio, Spain
| | - Monika Gonzalez-Lopez
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance, Derio, Spain
| | - Orhi Barroso-Gomila
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance, Derio, Spain
| | - Alfred C O Vertegaal
- Department of Cell and Chemical Biology, Leiden University Medical Center, Leiden, Netherlands
| | - Ana M Aransay
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance, Derio, Spain.,Centro de Investigación Biomédica en Red. Enfermedades Hepáticas y Digestivas (CIBERehd), Instituto de Salud Carlos III, Madrid, Spain
| | - Jose Antonio Rodriguez
- Department of Genetics, Physical Anthropology and Animal Physiology, University of the Basque Country, Leioa, Spain
| | - Manuel S Rodriguez
- Laboratoire de Chimie de Coordination-CNRS, Paul Sabatier: Université Toulouse III, Toulouse, France
| | - James D Sutherland
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance, Derio, Spain
| | - Rosa Barrio
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance, Derio, Spain
| |
Collapse
|
19
|
Flora P, Dalal G, Cohen I, Ezhkova E. Polycomb Repressive Complex(es) and Their Role in Adult Stem Cells. Genes (Basel) 2021; 12:1485. [PMID: 34680880 PMCID: PMC8535826 DOI: 10.3390/genes12101485] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 09/13/2021] [Accepted: 09/22/2021] [Indexed: 12/31/2022] Open
Abstract
Populations of resident stem cells (SCs) are responsible for maintaining, repairing, and regenerating adult tissues. In addition to having the capacity to generate all the differentiated cell types of the tissue, adult SCs undergo long periods of quiescence within the niche to maintain themselves. The process of SC renewal and differentiation is tightly regulated for proper tissue regeneration throughout an organisms' lifetime. Epigenetic regulators, such as the polycomb group (PcG) of proteins have been implicated in modulating gene expression in adult SCs to maintain homeostatic and regenerative balances in adult tissues. In this review, we summarize the recent findings that elucidate the composition and function of the polycomb repressive complex machinery and highlight their role in diverse adult stem cell compartments.
Collapse
Affiliation(s)
- Pooja Flora
- Department of Cell, Developmental, and Regenerative Biology, Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L. Levy Place, New York, NY 10029, USA;
| | - Gil Dalal
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel;
| | - Idan Cohen
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel;
| | - Elena Ezhkova
- Department of Cell, Developmental, and Regenerative Biology, Black Family Stem Cell Institute, Icahn School of Medicine at Mount Sinai, 1 Gustave L. Levy Place, New York, NY 10029, USA;
| |
Collapse
|
20
|
The SUMO E3 ligase CBX4 is identified as a poor prognostic marker of gastric cancer through multipronged OMIC analyses. Genes Dis 2021; 8:827-837. [PMID: 34522711 PMCID: PMC8427259 DOI: 10.1016/j.gendis.2020.08.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 08/13/2020] [Accepted: 08/24/2020] [Indexed: 11/21/2022] Open
Abstract
Gastric cancer (GC) is one of the most common malignancies, with an ever-increasing incidence and high mortality rate. Chromobox4 (CBX4), also named hPC2, is a small ubiquitin-related modifier (SUMO) E3 ligase. Previous studies have found that high CBX4 expression is associated with tumor size, pathologic differentiation and decreased patient survival in hepatocellular carcinoma (HCC). However, the expression and prognostic value of CBX4 in GC have not been clarified. In our study, ONCOMINE, UALCAN, Kaplan-Meier Plotter, cBioPortal, DAVID 6.8 and TIMER were utilized. RT-PCR, immunohistochemistry (IHC), Western blot, CCK-8 assay, cell apoptosis assay, cell cycle assay were used to further verify in GC tissue samples or cell line. The transcriptional and protein level of CBX4 in GC tissues was found significantly elevated and a significant association between the expression of CBX4 and clinicopathological parameters was found in GC patients. Low expression of CBX4 in GC patients were correlated with a significantly improved prognosis. The functions of CBX4 are primarily related to the stem cell pluripotency signaling pathway, Hippo signaling pathway, HTLV-I infection, Notch signaling pathway, and N-glycan biosynthesis. Our results may provide novel insights for the selection of therapeutic targets and prognostic biomarkers for GC.
Collapse
|
21
|
Oss-Ronen L, Cohen I. Epigenetic regulation and signalling pathways in Merkel cell development. Exp Dermatol 2021; 30:1051-1064. [PMID: 34152646 DOI: 10.1111/exd.14415] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 06/15/2021] [Accepted: 06/17/2021] [Indexed: 12/20/2022]
Abstract
Merkel cells are specialized epithelial cells connected to afferent nerve endings responsible for light-touch sensations, formed at specific locations in touch-sensitive regions of the mammalian skin. Although Merkel cells are descendants of the epidermal lineage, little is known about the mechanisms responsible for the development of these unique mechanosensory cells. Recent studies have highlighted that the Polycomb group (PcG) of proteins play a significant role in spatiotemporal regulation of Merkel cell formation. In addition, several of the major signalling pathways involved in skin development have been shown to regulate Merkel cell development as well. Here, we summarize the current understandings of the role of developmental regulators in Merkel cell formation, including the interplay between the epigenetic machinery and key signalling pathways, and the lineage-specific transcription factors involved in the regulation of Merkel cell development.
Collapse
Affiliation(s)
- Liat Oss-Ronen
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Science, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Idan Cohen
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Science, Ben-Gurion University of the Negev, Beer Sheva, Israel
| |
Collapse
|
22
|
Wagner RN, Piñón Hofbauer J, Wally V, Kofler B, Schmuth M, De Rosa L, De Luca M, Bauer JW. Epigenetic and metabolic regulation of epidermal homeostasis. Exp Dermatol 2021; 30:1009-1022. [PMID: 33600038 PMCID: PMC8359218 DOI: 10.1111/exd.14305] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 02/11/2021] [Accepted: 02/14/2021] [Indexed: 02/06/2023]
Abstract
Continuous exposure of the skin to environmental, mechanical and chemical stress necessitates constant self‐renewal of the epidermis to maintain its barrier function. This self‐renewal ability is attributed to epidermal stem cells (EPSCs), which are long‐lived, multipotent cells located in the basal layer of the epidermis. Epidermal homeostasis – coordinated proliferation and differentiation of EPSCs – relies on fine‐tuned adaptations in gene expression which in turn are tightly associated with specific epigenetic signatures and metabolic requirements. In this review, we will briefly summarize basic concepts of EPSC biology and epigenetic regulation with relevance to epidermal homeostasis. We will highlight the intricate interplay between mitochondrial energy metabolism and epigenetic events – including miRNA‐mediated mechanisms – and discuss how the loss of epigenetic regulation and epidermal homeostasis manifests in skin disease. Discussion of inherited epidermolysis bullosa (EB) and disorders of cornification will focus on evidence for epigenetic deregulation and failure in epidermal homeostasis, including stem cell exhaustion and signs of premature ageing. We reason that the epigenetic and metabolic component of epidermal homeostasis is significant and warrants close attention. Charting epigenetic and metabolic complexities also represents an important step in the development of future systemic interventions aimed at restoring epidermal homeostasis and ameliorating disease burden in severe skin conditions.
Collapse
Affiliation(s)
- Roland N Wagner
- Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Josefina Piñón Hofbauer
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Verena Wally
- EB House Austria, Research Program for Molecular Therapy of Genodermatoses, Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Barbara Kofler
- Research Program for Receptor Biochemistry and Tumor Metabolism, Department of Pediatrics, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| | - Matthias Schmuth
- Department of Dermatology, Medical University Innsbruck, Innsbruck, Austria
| | - Laura De Rosa
- Holostem Terapie Avanzate S.r.l., Center for Regenerative Medicine "Stefano Ferrari", Modena, Italy
| | - Michele De Luca
- Center for Regenerative Medicine "Stefano Ferrari", Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Johann W Bauer
- Department of Dermatology and Allergology, University Hospital of the Paracelsus Medical University, Salzburg, Austria
| |
Collapse
|
23
|
van Wijnen AJ, Bagheri L, Badreldin AA, Larson AN, Dudakovic A, Thaler R, Paradise CR, Wu Z. Biological functions of chromobox (CBX) proteins in stem cell self-renewal, lineage-commitment, cancer and development. Bone 2021; 143:115659. [PMID: 32979540 DOI: 10.1016/j.bone.2020.115659] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 09/02/2020] [Accepted: 09/21/2020] [Indexed: 02/06/2023]
Abstract
Epigenetic regulatory proteins support mammalian development, cancer, aging and tissue repair by controlling many cellular processes including stem cell self-renewal, lineage-commitment and senescence in both skeletal and non-skeletal tissues. We review here our knowledge of epigenetic regulatory protein complexes that support the formation of inaccessible heterochromatin and suppress expression of cell and tissue-type specific biomarkers during development. Maintenance and formation of heterochromatin critically depends on epigenetic regulators that recognize histone 3 lysine trimethylation at residues K9 and K27 (respectively, H3K9me3 and H3K27me3), which represent transcriptionally suppressive epigenetic marks. Three chromobox proteins (i.e., CBX1, CBX3 or CBX5) associated with the heterochromatin protein 1 (HP1) complex are methyl readers that interpret H3K9me3 marks which are mediated by H3K9 methyltransferases (i.e., SUV39H1 or SUV39H2). Other chromobox proteins (i.e., CBX2, CBX4, CBX6, CBX7 and CBX8) recognize H3K27me3, which is deposited by Polycomb Repressive Complex 2 (PRC2; a complex containing SUZ12, EED, RBAP46/48 and the methyl transferases EZH1 or EZH2). This second set of CBX proteins resides in PRC1, which has many subunits including other polycomb group factors (PCGF1, PCGF2, PCGF3, PCGF4, PCGF5, PCGF6), human polyhomeotic homologs (HPH1, HPH2, HPH3) and E3-ubiquitin ligases (RING1 or RING2). The latter enzymes catalyze the subsequent mono-ubiquitination of lysine 119 in H2A (H2AK119ub). We discuss biological, cellular and molecular functions of CBX proteins and their physiological and pathological activities in non-skeletal cells and tissues in anticipation of new discoveries on novel roles for CBX proteins in bone formation and skeletal development.
Collapse
Affiliation(s)
- Andre J van Wijnen
- Department of Orthopedic Surgery, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, MN, United States of America; Biochemistry & Molecular Biology, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, MN, United States of America; Center for Regenerative Medicine, Mayo Clinic, Rochester, MN, United States of America.
| | - Leila Bagheri
- Department of Orthopedic Surgery, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, MN, United States of America.
| | - Amr A Badreldin
- Department of Orthopedic Surgery, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, MN, United States of America.
| | - A Noelle Larson
- Department of Orthopedic Surgery, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, MN, United States of America.
| | - Amel Dudakovic
- Department of Orthopedic Surgery, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, MN, United States of America; Biochemistry & Molecular Biology, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, MN, United States of America.
| | - Roman Thaler
- Department of Orthopedic Surgery, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, MN, United States of America.
| | - Christopher R Paradise
- Center for Regenerative Medicine, Mayo Clinic, Rochester, MN, United States of America; Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, MN, United States of America
| | - Zhong Wu
- Department of Orthopedic Surgery, Mayo Clinic College of Medicine, Mayo Clinic, Rochester, MN, United States of America
| |
Collapse
|
24
|
Isoform-Specific Roles of Mutant p63 in Human Diseases. Cancers (Basel) 2021; 13:cancers13030536. [PMID: 33572532 PMCID: PMC7866788 DOI: 10.3390/cancers13030536] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 01/25/2021] [Accepted: 01/27/2021] [Indexed: 12/26/2022] Open
Abstract
Simple Summary The protein p63 belongs to the family of the p53 tumor suppressor. Mouse models have, however, shown that it is not a classical tumor suppressor but instead involved in developmental processes. Mutations in the p63 gene cause several developmental defects in human patients characterized by limb deformation, cleft lip/palate, and ectodermal dysplasia due to p63’s role as a master regulator of epidermal development. In addition, p63 plays a key role as a quality control factor in oocytes and p63 mutations can result either in compromised genetic quality control or premature cell death of all oocytes. Abstract The p63 gene encodes a master regulator of epidermal commitment, development, and differentiation. Heterozygous mutations in the DNA binding domain cause Ectrodactyly, Ectodermal Dysplasia, characterized by limb deformation, cleft lip/palate, and ectodermal dysplasia while mutations in in the C-terminal domain of the α-isoform cause Ankyloblepharon-Ectodermal defects-Cleft lip/palate (AEC) syndrome, a life-threatening disorder characterized by skin fragility, severe, long-lasting skin erosions, and cleft lip/palate. The molecular disease mechanisms of these syndromes have recently become elucidated and have enhanced our understanding of the role of p63 in epidermal development. Here we review the molecular cause and functional consequences of these p63-mutations for skin development and discuss the consequences of p63 mutations for female fertility.
Collapse
|
25
|
Daher MT, Bausero P, Agbulut O, Li Z, Parlakian A. Bcl11b/Ctip2 in Skin, Tooth, and Craniofacial System. Front Cell Dev Biol 2020; 8:581674. [PMID: 33363142 PMCID: PMC7758212 DOI: 10.3389/fcell.2020.581674] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 11/19/2020] [Indexed: 12/20/2022] Open
Abstract
Ctip2/Bcl11b is a zinc finger transcription factor with dual action (repression/activation) that couples epigenetic regulation to gene transcription during the development of various tissues. It is involved in a variety of physiological responses under healthy and pathological conditions. Its role and mechanisms of action are best characterized in the immune and nervous systems. Furthermore, its implication in the development and homeostasis of other various tissues has also been reported. In the present review, we describe its role in skin development, adipogenesis, tooth formation and cranial suture ossification. Experimental data from several studies demonstrate the involvement of Bcl11b in the control of the balance between cell proliferation and differentiation during organ formation and repair, and more specifically in the context of stem cell self-renewal and fate determination. The impact of mutations in the coding sequences of Bcl11b on the development of diseases such as craniosynostosis is also presented. Finally, we discuss genome-wide association studies that suggest a potential influence of single nucleotide polymorphisms found in the 3’ regulatory region of Bcl11b on the homeostasis of the cardiovascular system.
Collapse
Affiliation(s)
- Marie-Thérèse Daher
- Biological Adaptation and Ageing, Inserm ERL U1164, UMR CNRS 8256, Institut de Biologie Paris-Seine, Sorbonne Université, Paris, France
| | - Pedro Bausero
- Biological Adaptation and Ageing, Inserm ERL U1164, UMR CNRS 8256, Institut de Biologie Paris-Seine, Sorbonne Université, Paris, France
| | - Onnik Agbulut
- Biological Adaptation and Ageing, Inserm ERL U1164, UMR CNRS 8256, Institut de Biologie Paris-Seine, Sorbonne Université, Paris, France
| | - Zhenlin Li
- Biological Adaptation and Ageing, Inserm ERL U1164, UMR CNRS 8256, Institut de Biologie Paris-Seine, Sorbonne Université, Paris, France
| | - Ara Parlakian
- Biological Adaptation and Ageing, Inserm ERL U1164, UMR CNRS 8256, Institut de Biologie Paris-Seine, Sorbonne Université, Paris, France
| |
Collapse
|
26
|
Yi M, Tan Y, Wang L, Cai J, Li X, Zeng Z, Xiong W, Li G, Li X, Tan P, Xiang B. TP63 links chromatin remodeling and enhancer reprogramming to epidermal differentiation and squamous cell carcinoma development. Cell Mol Life Sci 2020; 77:4325-4346. [PMID: 32447427 PMCID: PMC7588389 DOI: 10.1007/s00018-020-03539-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 02/21/2020] [Accepted: 04/24/2020] [Indexed: 12/19/2022]
Abstract
Squamous cell carcinoma (SCC) is an aggressive malignancy that can originate from various organs. TP63 is a master regulator that plays an essential role in epidermal differentiation. It is also a lineage-dependent oncogene in SCC. ΔNp63α is the prominent isoform of TP63 expressed in epidermal cells and SCC, and overexpression promotes SCC development through a variety of mechanisms. Recently, ΔNp63α was highlighted to act as an epidermal-specific pioneer factor that binds closed chromatin and enhances chromatin accessibility at epidermal enhancers. ΔNp63α coordinates chromatin-remodeling enzymes to orchestrate the tissue-specific enhancer landscape and three-dimensional high-order architecture of chromatin. Moreover, ΔNp63α establishes squamous-like enhancer landscapes to drive oncogenic target expression during SCC development. Importantly, ΔNp63α acts as an upstream regulator of super enhancers to activate a number of oncogenic transcripts linked to poor prognosis in SCC. Mechanistically, ΔNp63α activates genes transcription through physically interacting with a number of epigenetic modulators to establish enhancers and enhance chromatin accessibility. In contrast, ΔNp63α also represses gene transcription via interacting with repressive epigenetic regulators. ΔNp63α expression is regulated at multiple levels, including transcriptional, post-transcriptional, and post-translational levels. In this review, we summarize recent advances of p63 in epigenomic and transcriptional control, as well as the mechanistic regulation of p63.
Collapse
Affiliation(s)
- Mei Yi
- NHC Key Laboratory of Carcinogenesis, Hunan Provincial Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410013, Hunan, China
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, The Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, China
- The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute and School of Basic Medical Sciences, Central South University, Changsha, 410078, Hunan, China
| | - Yixin Tan
- Department of Dermatology, The Second Xiangya Hospital, The Central South University, Changsha, 410011, Hunan, China
| | - Li Wang
- Department of Thoracic Surgery, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Jing Cai
- NHC Key Laboratory of Carcinogenesis, Hunan Provincial Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410013, Hunan, China
- Department of Dermatology, Xiangya Hospital, Central South University, Changsha, 410008, Hunan, China
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, The Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, China
- The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute and School of Basic Medical Sciences, Central South University, Changsha, 410078, Hunan, China
| | - Xiaoling Li
- NHC Key Laboratory of Carcinogenesis, Hunan Provincial Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410013, Hunan, China
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, The Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, China
- The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute and School of Basic Medical Sciences, Central South University, Changsha, 410078, Hunan, China
| | - Zhaoyang Zeng
- NHC Key Laboratory of Carcinogenesis, Hunan Provincial Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410013, Hunan, China
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, The Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, China
- The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute and School of Basic Medical Sciences, Central South University, Changsha, 410078, Hunan, China
| | - Wei Xiong
- NHC Key Laboratory of Carcinogenesis, Hunan Provincial Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410013, Hunan, China
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, The Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, China
- The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute and School of Basic Medical Sciences, Central South University, Changsha, 410078, Hunan, China
| | - Guiyuan Li
- NHC Key Laboratory of Carcinogenesis, Hunan Provincial Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410013, Hunan, China
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, The Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, China
- The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute and School of Basic Medical Sciences, Central South University, Changsha, 410078, Hunan, China
| | - Xiayu Li
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, The Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, China.
| | - Pingqing Tan
- NHC Key Laboratory of Carcinogenesis, Hunan Provincial Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410013, Hunan, China.
- Department of Head and Neck Surgery, Hunan Provincial Cancer Hospital and Cancer Hospital Affiliated to Xiangya Medical School, Central South University, Changsha, 410013, Hunan, China.
| | - Bo Xiang
- NHC Key Laboratory of Carcinogenesis, Hunan Provincial Cancer Hospital and the Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410013, Hunan, China.
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, The Third Xiangya Hospital, Central South University, Changsha, 410013, Hunan, China.
- The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute and School of Basic Medical Sciences, Central South University, Changsha, 410078, Hunan, China.
| |
Collapse
|
27
|
Abstract
p63 (also known as TP63) is a transcription factor of the p53 family, along with p73. Multiple isoforms of p63 have been discovered and these have diverse functions encompassing a wide array of cell biology. p63 isoforms are implicated in lineage specification, proliferative potential, differentiation, cell death and survival, DNA damage response and metabolism. Furthermore, p63 is linked to human disease states including cancer. p63 is critical to many aspects of cell signaling, and in this Cell science at a glance article and the accompanying poster, we focus on the signaling cascades regulating TAp63 and ΔNp63 isoforms and those that are regulated by TAp63 and ΔNp63, as well the role of p63 in disease.
Collapse
Affiliation(s)
- Matthew L Fisher
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, 11724, USA
| | - Seamus Balinth
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, 11724, USA.,Stony Brook University, Department of Molecular and Cell Biology, Stony Brook, NY, 11794, USA
| | - Alea A Mills
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, 11724, USA
| |
Collapse
|
28
|
Ren X, Hu B, Song M, Ding Z, Dang Y, Liu Z, Zhang W, Ji Q, Ren R, Ding J, Chan P, Jiang C, Ye K, Qu J, Tang F, Liu GH. Maintenance of Nucleolar Homeostasis by CBX4 Alleviates Senescence and Osteoarthritis. Cell Rep 2020; 26:3643-3656.e7. [PMID: 30917318 DOI: 10.1016/j.celrep.2019.02.088] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 01/27/2019] [Accepted: 02/21/2019] [Indexed: 01/12/2023] Open
Abstract
CBX4, a component of polycomb repressive complex 1 (PRC1), plays important roles in the maintenance of cell identity and organ development through gene silencing. However, whether CBX4 regulates human stem cell homeostasis remains unclear. Here, we demonstrate that CBX4 counteracts human mesenchymal stem cell (hMSC) aging via the maintenance of nucleolar homeostasis. CBX4 protein is downregulated in aged hMSCs, whereas CBX4 knockout in hMSCs results in destabilized nucleolar heterochromatin, enhanced ribosome biogenesis, increased protein translation, and accelerated cellular senescence. CBX4 maintains nucleolar homeostasis by recruiting nucleolar protein fibrillarin (FBL) and heterochromatin protein KRAB-associated protein 1 (KAP1) at nucleolar rDNA, limiting the excessive expression of rRNAs. Overexpression of CBX4 alleviates physiological hMSC aging and attenuates the development of osteoarthritis in mice. Altogether, our findings reveal a critical role of CBX4 in counteracting cellular senescence by maintaining nucleolar homeostasis, providing a potential therapeutic target for aging-associated disorders.
Collapse
Affiliation(s)
- Xiaoqing Ren
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Boqiang Hu
- Biodynamic Optical Imaging Center, College of Life Sciences, Peking University, Beijing 100871, China
| | - Moshi Song
- University of Chinese Academy of Sciences, Beijing 100049, China; State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing 100101, China
| | - Zhichao Ding
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yujiao Dang
- Biodynamic Optical Imaging Center, College of Life Sciences, Peking University, Beijing 100871, China
| | - Zunpeng Liu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Weiqi Zhang
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China; Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing 100101, China; Advanced Innovation Center for Human Brain Protection, National Clinical Research Center for Geriatric Disorders, Xuanwu Hospital Capital Medical University, Beijing 100053, China
| | - Qianzhao Ji
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ruotong Ren
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China; Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing 100101, China
| | - Jianjian Ding
- Army Diagnosis and Treatment Center for Oral Disease, 306th Hospital of the PLA, Beijing 100101, China
| | - Piu Chan
- Advanced Innovation Center for Human Brain Protection, National Clinical Research Center for Geriatric Disorders, Xuanwu Hospital Capital Medical University, Beijing 100053, China
| | - Changtao Jiang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education and Beijing Key Laboratory of Cardiovascular Receptors Research, Beijing 100191, China
| | - Keqiong Ye
- University of Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory of RNA Biology, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Jing Qu
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China; Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing 100101, China.
| | - Fuchou Tang
- Biodynamic Optical Imaging Center, College of Life Sciences, Peking University, Beijing 100871, China; Peking-Tsinghua Center for Life Sciences, Peking University, Beijing 100871, China; Ministry of Education Key Laboratory of Cell Proliferation and Differentiation, Beijing 100871, China; Biomedical Institute for Pioneering Investigation via Convergence, Peking University, Beijing 100871, China.
| | - Guang-Hui Liu
- National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China; Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing 100101, China; Advanced Innovation Center for Human Brain Protection, National Clinical Research Center for Geriatric Disorders, Xuanwu Hospital Capital Medical University, Beijing 100053, China; Beijing Institute for Brain Disorders, Capital Medical University, Beijing 100069, China.
| |
Collapse
|
29
|
Jiang N, Niu G, Pan YH, Pan W, Zhang MF, Zhang CZ, Shen H. CBX4 transcriptionally suppresses KLF6 via interaction with HDAC1 to exert oncogenic activities in clear cell renal cell carcinoma. EBioMedicine 2020; 53:102692. [PMID: 32113161 PMCID: PMC7044754 DOI: 10.1016/j.ebiom.2020.102692] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 02/12/2020] [Accepted: 02/12/2020] [Indexed: 12/19/2022] Open
Abstract
Background Dysregulation of polycomb chromobox (CBX) proteins that mediate epigenetic gene silencing contributes to the progression of human cancers. Yet their roles in clear cell renal cell carcinoma (ccRCC) remain to be explored. Methods The expression of CBX4 and its clinical significance were determined by qRT-PCR, western blot, immunohistochemistry and statistical analyses. The biological function of CBX4 in ccRCC tumor growth and metastasis and the underlying mechanism were investigated using in vitro and in vivo models. Findings CBX4 exerts oncogenic activities in ccRCC via interaction with HDAC1 to transcriptionally suppress tumor suppressor KLF6. CBX4 expression is increased in ccRCC and correlated with poor prognosis in two independent cohorts containing 840 patients. High CBX4 expression is significantly associated with Fuhrman grade and tumor lymph node invasion. CBX4 overexpression promotes tumor growth and metastasis, whereas CBX4 knockdown results in the opposite phenotypes. Mechanistically, CBX4 downregulates KLF6 via repressing the transcriptional activity of its promoter. Further studies show that CBX4 physically binds to HDAC1 to maintain its localization on the KLF6 promoter. Ectopic expression of KLF6 or disruption of CBX4-HDAC1 interaction attenuates CBX4-mediated cell growth and migration. Furthermore, CBX4 depletion markedly enhances the histone deacetylase inhibitor (HDACi)-induced cell apoptosis and suppression of tumor growth. Interpretation Our data suggest CBX4 as an oncogene with prognostic potential in ccRCC. The newly identified CBX4/HDAC1/KLF6 axis may represent a potential therapeutic target for the clinical intervention of ccRCC.
Collapse
Affiliation(s)
- Nan Jiang
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Gang Niu
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Ying-Hua Pan
- Department of Rheumatology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510600, China
| | - Wenwei Pan
- Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China
| | - Mei-Fang Zhang
- Department of Pathology, Sun Yat-sen University Cancer Center, China; State Key Laboratory of Oncology in South China, China; Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
| | - Chris Zhiyi Zhang
- Department of Pathology, Sun Yat-sen University Cancer Center, China; State Key Laboratory of Oncology in South China, China; Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China; Key Laboratory of Functional Protein Research of Guangdong Higher Education Institutes and MOE Key Laboratory of Tumor Molecular Biology, Institute of Life and Health Engineering, College of Life Science and Technology, Jinan University, Guangzhou 510632, China.
| | - Huimin Shen
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, China.
| |
Collapse
|
30
|
Todorova K, Mandinova A. Novel approaches for managing aged skin and nonmelanoma skin cancer. Adv Drug Deliv Rev 2020; 153:18-27. [PMID: 32526451 DOI: 10.1016/j.addr.2020.06.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Revised: 05/30/2020] [Accepted: 06/04/2020] [Indexed: 12/29/2022]
Abstract
The process of aging influences every bodily organ and tissue, and those with rapid epithelial cell turnover, are particularly affected. The most visible of these, however, is the skin (including the epidermis), the largest human organ that provides a barrier to external insults, structure to the body and its movements, facilitates thermoregulation, harbors immune cells, and incorporates sensory neurons (including mechanoreceptors, nociceptors, and thermoreceptors). Skin aging has traditionally been categorized into intrinsic and extrinsic, with the latter nearly exclusively restricted to "photoaging," (i.e., aging due to exposure to solar or artificial ultraviolet radiation). However, both intrinsic and extrinsic aging share similar causes, including oxidative damage, telomere shortening, and mitochondrial senescence. Also, like other malignancies, the risk of malignant and nonmalignant lesions increases with age. Herein, we review the most recent findings in skin aging and nonmelanoma skin cancer, including addition to traditional and developing therapies.
Collapse
|
31
|
Cho SW, Park TH. Comparative Evaluation of Sensitivity to Hexanal Between Human and Canine Olfactory Receptors. BIOTECHNOL BIOPROC E 2019. [DOI: 10.1007/s12257-019-0265-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
32
|
Hu C, Zhang Q, Tang Q, Zhou H, Liu W, Huang J, Liu Y, Wang Q, Zhang J, Zhou M, Sheng F, Lai W, Tian J, Li G, Zhang R. CBX4 promotes the proliferation and metastasis via regulating BMI-1 in lung cancer. J Cell Mol Med 2019; 24:618-631. [PMID: 31724308 PMCID: PMC6933416 DOI: 10.1111/jcmm.14771] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 09/09/2019] [Accepted: 09/13/2019] [Indexed: 12/16/2022] Open
Abstract
Proliferation and metastasis are significantly malignant characteristics of human lung cancer, but the underlying molecular mechanisms are poorly understood. Chromobox 4 (CBX4), a member of the Polycomb group (PcG) family of epigenetic regulatory factors, enhances cellular proliferation and promotes cancer cell migration. However, the effect of CBX4 in the progression of lung cancer is not fully understood. We found that CBX4 is highly expressed in lung tumours compared with adjacent normal tissues. Overexpression of CBX4 significantly promotes cell proliferation and migration in human lung cancer cell lines. The knockdown of CBX4 obviously suppresses the cell growth and migration of human lung cancer cells in vitro. Also, the proliferation and metastasis in vivo are blocked by CBX4 knockdown. Furthermore, CBX4 knockdown effectively arrests cell cycle at the G0/G1 phase through suppressing the expression of CDK2 and Cyclin E and decreases the formation of filopodia through suppressing MMP2, MMP9 and CXCR4. Additionally, CBX4 promotes proliferation and metastasis via regulating the expression of BMI‐1 which is a significant regulator of proliferation and migration in lung cancer cells. Taken together, these data suggest that CBX4 is not only a novel prognostic marker but also may be a potential therapeutic target in lung cancer.
Collapse
Affiliation(s)
- Changpeng Hu
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Qian Zhang
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Qin Tang
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Huyue Zhou
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Wuyi Liu
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Jingbin Huang
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Yali Liu
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Qin Wang
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Jing Zhang
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Min Zhou
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Fangfang Sheng
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Wenjing Lai
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Jing Tian
- Department of Teaching Support, Army Medical University, Chongqing, China
| | - Guobing Li
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| | - Rong Zhang
- Department of Pharmacy, The Second Affiliated Hospital, Army Medical University, Chongqing, China
| |
Collapse
|
33
|
Pioneer and repressive functions of p63 during zebrafish embryonic ectoderm specification. Nat Commun 2019; 10:3049. [PMID: 31296872 PMCID: PMC6624255 DOI: 10.1038/s41467-019-11121-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 06/20/2019] [Indexed: 12/14/2022] Open
Abstract
The transcription factor p63 is a master regulator of ectoderm development. Although previous studies show that p63 triggers epidermal differentiation in vitro, the roles of p63 in developing embryos remain poorly understood. Here, we use zebrafish embryos to analyze in vivo how p63 regulates gene expression during development. We generate tp63-knock-out mutants that recapitulate human phenotypes and show down-regulated epidermal gene expression. Following p63-binding dynamics, we find two distinct functions clearly separated in space and time. During early development, p63 binds enhancers associated to neural genes, limiting Sox3 binding and reducing neural gene expression. Indeed, we show that p63 and Sox3 are co-expressed in the neural plate border. On the other hand, p63 acts as a pioneer factor by binding non-accessible chromatin at epidermal enhancers, promoting their opening and epidermal gene expression in later developmental stages. Therefore, our results suggest that p63 regulates cell fate decisions during vertebrate ectoderm specification.
Collapse
|
34
|
Kang S, Chovatiya G, Tumbar T. Epigenetic control in skin development, homeostasis and injury repair. Exp Dermatol 2019; 28:453-463. [PMID: 30624812 PMCID: PMC6488370 DOI: 10.1111/exd.13872] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 12/11/2018] [Accepted: 01/05/2019] [Indexed: 12/14/2022]
Abstract
Cell-type- and cell-state-specific patterns of covalent modifications on DNA and histone tails form global epigenetic profiles that enable spatiotemporal regulation of gene expression. These epigenetic profiles arise from coordinated activities of transcription factors and epigenetic modifiers, which result in cell-type-specific outputs in response to dynamic environmental conditions and signalling pathways. Recent mouse genetic and functional studies have highlighted the physiological significance of global DNA and histone epigenetic modifications in skin. Importantly, specific epigenetic profiles are emerging for adult skin stem cells that are associated with their cell fate plasticity and proper activity in tissue regeneration. We can now begin to draw a more comprehensive picture of how epigenetic modifiers orchestrate their cell-intrinsic role with microenvironmental cues for proper skin development, homeostasis and wound repair. The field is ripe to begin to implement these findings from the laboratory into skin therapies.
Collapse
Affiliation(s)
- Sangjo Kang
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York
| | - Gopal Chovatiya
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York
| | - Tudorita Tumbar
- Department of Molecular Biology and Genetics, Cornell University, Ithaca, New York
| |
Collapse
|
35
|
Gatti V, Fierro C, Annicchiarico-Petruzzelli M, Melino G, Peschiaroli A. ΔNp63 in squamous cell carcinoma: defining the oncogenic routes affecting epigenetic landscape and tumour microenvironment. Mol Oncol 2019; 13:981-1001. [PMID: 30845357 PMCID: PMC6487733 DOI: 10.1002/1878-0261.12473] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 02/21/2019] [Accepted: 02/22/2019] [Indexed: 12/20/2022] Open
Abstract
Squamous cell carcinoma (SCC) is a treatment‐refractory tumour which arises from the epithelium of diverse anatomical sites such as oesophagus, head and neck, lung and skin. Accumulating evidence has revealed a number of genomic, clinical and molecular features commonly observed in SCC of distinct origins. Some of these genetic events culminate in fostering the activity of ΔNp63, a potent oncogene which exerts its pro‐tumourigenic effects by regulating specific transcriptional programmes to sustain malignant cell proliferation and survival. In this review, we will describe the genetic and epigenetic determinants underlying ΔNp63 oncogenic activities in SCC, and discuss some relevant transcriptional effectors of ΔNp63, emphasizing their impact in modulating the crosstalk between tumour cells and tumour microenvironment (TME).
Collapse
Affiliation(s)
- Veronica Gatti
- Department of Experimental Medicine, TOR, University of Rome, Tor Vergata, Italy
| | - Claudia Fierro
- Department of Experimental Medicine, TOR, University of Rome, Tor Vergata, Italy
| | | | - Gerry Melino
- Department of Experimental Medicine, TOR, University of Rome, Tor Vergata, Italy.,Medical Research Council, Toxicology Unit, University of Cambridge, UK
| | - Angelo Peschiaroli
- National Research Council of Italy, Institute of Translational Pharmacology, Rome, Italy
| |
Collapse
|
36
|
Singarapu N, Ma K, Reeh KAG, Shen J, Lancaster JN, Yi S, Xie H, Orkin SH, Manley NR, Ehrlich LIR, Jiang N, Richie ER. Polycomb Repressive Complex 2 is essential for development and maintenance of a functional TEC compartment. Sci Rep 2018; 8:14335. [PMID: 30254371 PMCID: PMC6156232 DOI: 10.1038/s41598-018-32729-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 09/12/2018] [Indexed: 12/15/2022] Open
Abstract
Thymic epithelial cells (TEC) are essential for thymocyte differentiation and repertoire selection. Despite their indispensable role in generating functional T cells, the molecular mechanisms that orchestrate TEC development from endodermal progenitors in the third pharyngeal pouch (3rd PP) are not fully understood. We recently reported that the T-box transcription factor TBX1 negatively regulates TEC development. Although initially expressed throughout the 3rd PP, Tbx1 becomes downregulated in thymus-fated progenitors and when ectopically expressed impairs TEC progenitor proliferation and differentiation. Here we show that ectopic Tbx1 expression in thymus fated endoderm increases expression of Polycomb repressive complex 2 (PRC2) target genes in TEC. PRC2 is an epigenetic modifier that represses gene expression by catalyzing trimethylation of lysine 27 on histone H3. The increased expression of PRC2 target genes suggests that ectopic Tbx1 interferes with PRC2 activity and implicates PRC2 as an important regulator of TEC development. To test this hypothesis, we used Foxn1Cre to delete Eed, a PRC2 component required for complex stability and function in thymus fated 3rd PP endoderm. Proliferation and differentiation of fetal and newborn TEC were disrupted in the conditional knockout (EedCKO) mutants leading to severely dysplastic adult thymi. Consistent with PRC2-mediated transcriptional silencing, the majority of differentially expressed genes (DEG) were upregulated in EedCKO TEC. Moreover, a high frequency of EedCKO DEG overlapped with DEG in TEC that ectopically expressed Tbx1. These findings demonstrate that PRC2 plays a critical role in TEC development and suggest that Tbx1 expression must be downregulated in thymus fated 3rd PP endoderm to ensure optimal PRC2 function.
Collapse
Affiliation(s)
- Nandini Singarapu
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas M.D. Anderson Cancer Center, Science Park, Smithville, Texas, 78957, USA
| | - Keyue Ma
- Department of Biomedical Engineering, Cockrell School of Engineering, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Kaitlin A G Reeh
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas M.D. Anderson Cancer Center, Science Park, Smithville, Texas, 78957, USA
| | - Jianjun Shen
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas M.D. Anderson Cancer Center, Science Park, Smithville, Texas, 78957, USA
| | - Jessica N Lancaster
- Department of Molecular Biosciences, Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Song Yi
- Department of Oncology, Dell Medical School and Department of Biomedical Engineering, Cockrell School of Engineering, The University of Texas at Austin, Austin, TX, 78712, USA.,Livestrong Cancer Institutes, Dell Medical School, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Huafeng Xie
- Division of Hematology/Oncology, Boston Children's Hospital, Boston, MA, 02115, USA.,Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, 02115, USA
| | - Stuart H Orkin
- Division of Hematology/Oncology, Boston Children's Hospital, Boston, MA, 02115, USA.,Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, 02115, USA.,Harvard Stem Cell Institute, Harvard University, Cambridge, MA, 02138, USA.,Howard Hughes Medical Institute, Boston, MA, 02115, USA
| | - Nancy R Manley
- Department of Genetics, Paul D. Coverdell Center, 500 DW Brooks Drive, University of Georgia, Athens, GA, 30602, USA
| | - Lauren I R Ehrlich
- Department of Molecular Biosciences, Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, TX, 78712, USA.,Livestrong Cancer Institutes, Dell Medical School, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Ning Jiang
- Department of Biomedical Engineering, Cockrell School of Engineering, The University of Texas at Austin, Austin, TX, 78712, USA
| | - Ellen R Richie
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas M.D. Anderson Cancer Center, Science Park, Smithville, Texas, 78957, USA.
| |
Collapse
|
37
|
Soares E, Zhou H. Master regulatory role of p63 in epidermal development and disease. Cell Mol Life Sci 2018; 75:1179-1190. [PMID: 29103147 PMCID: PMC5843667 DOI: 10.1007/s00018-017-2701-z] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 10/16/2017] [Accepted: 10/26/2017] [Indexed: 01/19/2023]
Abstract
The transcription factor p63 is a master regulator of epidermal development. Mutations in p63 give rise to human developmental diseases that often manifest epidermal defects. In this review, we summarize major p63 isoforms identified so far and p63 mutation-associated human diseases that show epidermal defects. We discuss key roles of p63 in epidermal keratinocyte proliferation and differentiation, emphasizing its master regulatory control of the gene expression pattern and epigenetic landscape that define epidermal fate. We subsequently review the essential function of p63 during epidermal commitment and transdifferentiation towards epithelial lineages, highlighting the notion that p63 is the guardian of the epithelial lineage. Finally, we discuss current therapeutic development strategies for p63 mutation-associated diseases. Our review proposes future directions for dissecting p63-controlled mechanisms in normal and diseased epidermal development and for developing therapeutic options.
Collapse
Affiliation(s)
- Eduardo Soares
- Department of Molecular Developmental Biology, Faculty of Science, Radboud Institute for Molecular Life Sciences, Radboud University, 274, Postbus 9101, 6500HB, Nijmegen, The Netherlands
- CAPES Foundation, Ministry of Education of Brazil, Brasília, Brazil
| | - Huiqing Zhou
- Department of Molecular Developmental Biology, Faculty of Science, Radboud Institute for Molecular Life Sciences, Radboud University, 274, Postbus 9101, 6500HB, Nijmegen, The Netherlands.
- Department of Human Genetics, Radboud University Medical Center, 855, Postbus 9101, 6500HB, Nijmegen, The Netherlands.
| |
Collapse
|
38
|
Wilms C, Krikki I, Hainzl A, Kilo S, Alupei M, Makrantonaki E, Wagner M, Kroeger CM, Brinker TJ, Gatzka M. 2A-DUB/Mysm1 Regulates Epidermal Development in Part by Suppressing p53-Mediated Programs. Int J Mol Sci 2018; 19:ijms19030687. [PMID: 29495602 PMCID: PMC5877548 DOI: 10.3390/ijms19030687] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 02/18/2018] [Accepted: 02/27/2018] [Indexed: 01/26/2023] Open
Abstract
Development and homeostasis of the epidermis are governed by a complex network of sequence-specific transcription factors and epigenetic modifiers cooperatively regulating the subtle balance of progenitor cell self-renewal and terminal differentiation. To investigate the role of histone H2A deubiquitinase 2A-DUB/Mysm1 in the skin, we systematically analyzed expression, developmental functions, and potential interactions of this epigenetic regulator using Mysm1-deficient mice and skin-derived epidermal cells. Morphologically, skin of newborn and young adult Mysm1-deficient mice was atrophic with reduced thickness and cellularity of epidermis, dermis, and subcutis, in context with altered barrier function. Skin atrophy correlated with reduced proliferation rates in Mysm1-/- epidermis and hair follicles, and increased apoptosis compared with wild-type controls, along with increases in DNA-damage marker γH2AX. In accordance with diminished α6-Integrinhigh+CD34⁺ epidermal stem cells, reduced colony formation of Mysm1-/- epidermal progenitors was detectable in vitro. On the molecular level, we identified p53 as potential mediator of the defective Mysm1-deficient epidermal compartment, resulting in increased pro-apoptotic and anti-proliferative gene expression. In Mysm1-/-p53-/- double-deficient mice, significant recovery of skin atrophy was observed. Functional properties of Mysm1-/- developing epidermis were assessed by quantifying the transepidermal water loss. In summary, this investigation uncovers a role for 2A-DUB/Mysm1 in suppression of p53-mediated inhibitory programs during epidermal development.
Collapse
Affiliation(s)
- Christina Wilms
- Department of Dermatology and Allergic Diseases, University of Ulm, 89081 Ulm, Germany.
| | - Ioanna Krikki
- Department of Dermatology and Allergic Diseases, University of Ulm, 89081 Ulm, Germany.
| | - Adelheid Hainzl
- Department of Dermatology and Allergic Diseases, University of Ulm, 89081 Ulm, Germany.
| | - Sonja Kilo
- Institute and Out-Patient Clinic of Occupational, Social, and Environmental Medicine, Friedrich-Alexander University, 91054 Erlangen-Nürnberg, Germany.
| | - Marius Alupei
- Department of Dermatology and Allergic Diseases, University of Ulm, 89081 Ulm, Germany.
| | - Evgenia Makrantonaki
- Department of Dermatology and Allergic Diseases, University of Ulm, 89081 Ulm, Germany.
| | - Maximilian Wagner
- Department of Dermatology and Allergic Diseases, University of Ulm, 89081 Ulm, Germany.
| | - Carsten M Kroeger
- Department of Dermatology and Allergic Diseases, University of Ulm, 89081 Ulm, Germany.
| | - Titus Josef Brinker
- Department of Dermatology, University Hospital Heidelberg, 69120 Heidelberg, Germany.
- National Center for Tumor Diseases (NCT), 69120 Heidelberg, Germany.
| | - Martina Gatzka
- Department of Dermatology and Allergic Diseases, University of Ulm, 89081 Ulm, Germany.
| |
Collapse
|
39
|
Zeng JS, Zhang ZD, Pei L, Bai ZZ, Yang Y, Yang H, Tian QH. CBX4 exhibits oncogenic activities in breast cancer via Notch1 signaling. Int J Biochem Cell Biol 2017; 95:1-8. [PMID: 29229426 DOI: 10.1016/j.biocel.2017.12.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Accepted: 12/06/2017] [Indexed: 01/09/2023]
Abstract
Polycomb chromobox (CBX) proteins are involved in gene silencing to function as oncogenes or tumor suppressors through the polycomb repressive complex (PRC1). CBX4 has been implicated in the progression of human cancers, but its role and clinical significance in breast cancer remain unclear. Here, we show that CBX4 is up-regulated in breast cancer and exerts oncogenic activities via miR-137-mediated activation of Notch1 signaling pathway. CBX4 expression was increased in breast cancer, compared with the nontumorous tissues. High CBX4 expression was closely correlated with tumor metastasis, advanced clinical stage and poor overall survival in a cohort of 179 patients with breast cancer. In vitro studies demonstrated that CBX4 overexpression enhanced, whereas CBX4 knockdown inhibited cell growth and migration. Mechanistically, in a PRC1-dependent manner, CBX4 inhibited the promoter activity of miR-137 and suppressed its expression. miR-137 decreased the expression of Notch1, Jag1 and Hey2 via targeting their 3'-UTRs. The suppression of Notch1 by siRNA or overexpression of miR-137 markedly attenuated CBX4-promoted phenotypes. Collectively, these findings indicate that CBX4 promotes breast cancer via miR-137-mediated Notch1 signaling. Our data, therefore, suggest that CBX4 serve as a prognostic biomarker and that targeting CBX4/miR-137 axis may provide therapeutic potent in the treatment of breast cancer.
Collapse
Affiliation(s)
- Jin-Sheng Zeng
- Department of General Surgery, First Affiliated Hospital of NanChang University, NanChang, Jiangxi 330006, China
| | - Zhen-Dong Zhang
- Department of Pathology, First Affiliated Hospital of NanChang University, NanChang, Jiangxi 330006, China
| | - Li Pei
- Department of Imaging and Interventional Radiology, First Affiliated Hospital of NanChang University, NanChang, Jiangxi 330006, China
| | - Zhi-Zhu Bai
- Department of General Surgery, First Affiliated Hospital of NanChang University, NanChang, Jiangxi 330006, China
| | - Yong Yang
- Department of General Surgery, First Affiliated Hospital of NanChang University, NanChang, Jiangxi 330006, China
| | - Hong Yang
- Department of Thoracic Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China.
| | - Qiu-Hong Tian
- Department of Oncology, First Affiliated Hospital of NanChang University, NanChang, Jiangxi 330006, China.
| |
Collapse
|
40
|
Rapisarda V, Malashchuk I, Asamaowei IE, Poterlowicz K, Fessing MY, Sharov AA, Karakesisoglou I, Botchkarev VA, Mardaryev A. p63 Transcription Factor Regulates Nuclear Shape and Expression of Nuclear Envelope-Associated Genes in Epidermal Keratinocytes. J Invest Dermatol 2017; 137:2157-2167. [PMID: 28595999 PMCID: PMC5610935 DOI: 10.1016/j.jid.2017.05.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 04/20/2017] [Accepted: 05/01/2017] [Indexed: 01/07/2023]
Abstract
The maintenance of a proper nuclear architecture and three-dimensional organization of the genes, enhancer elements, and transcription machinery plays an essential role in tissue development and regeneration. Here we show that in the developing skin, epidermal progenitor cells of mice lacking p63 transcription factor display alterations in the nuclear shape accompanied by a marked decrease in expression of several nuclear envelope-associated components (Lamin B1, Lamin A/C, Sun1, Nesprin-3, Plectin) compared with controls. Furthermore, chromatin immunoprecipitation-quantitative PCR assay showed enrichment of p63 on Sun1, Syne3, and Plec promoters, suggesting them as p63 targets. Alterations in the nuclei shape and expression of nuclear envelope-associated proteins were accompanied by altered distribution patterns of the repressive histone marks trimethylation on lysine 27 of histone H3, trimethylation on lysine 9 of histone H3, and heterochromatin protein 1-alpha in p63-null keratinocytes. These changes were also accompanied by downregulation of the transcriptional activity and relocation of the keratinocyte-specific gene loci away from the sites of active transcription toward the heterochromatin-enriched repressive nuclear compartments in p63-null cells. These data demonstrate functional links between the nuclear envelope organization, chromatin architecture, and gene expression in keratinocytes and suggest nuclear envelope-associated genes as important targets mediating p63-regulated gene expression program in the epidermis.
Collapse
Key Words
- cc, chromocenter
- chip-qpcr, chromatin immunoprecipitation-quantitative pcr
- h3k9me3, trimethylation on lysine 9 of histone h3
- h3k27me3, trimethylation on lysine 27 of histone h3
- ktyi, keratin type i
- ktyii, keratin type ii
- pmk, primary mouse keratinocyte
- if, intermediate filament
- nm, nuclear membrane
- ne, nuclear envelope
- wt, wild-type
Collapse
Affiliation(s)
| | - Igor Malashchuk
- Centre for Skin Sciences, University of Bradford, Bradford, UK
| | | | | | | | - Andrey A Sharov
- Department of Dermatology, Boston University School of Medicine, Boston, Massachusetts, USA
| | | | - Vladimir A Botchkarev
- Centre for Skin Sciences, University of Bradford, Bradford, UK; Department of Dermatology, Boston University School of Medicine, Boston, Massachusetts, USA.
| | | |
Collapse
|
41
|
Abstract
Many of the known SUMO substrates are nuclear proteins, which regulate gene expression and chromatin dynamics. Sumoylation, in general, appears to correlate with decreased transcriptional activity, and in many cases modulation of the chromatin template is implicated. Sumoylation of the core histones is associated with transcriptional silencing, and transcription factor sumoylation can decrease gene expression by promoting recruitment of chromatin modifying enzymes. Additionally, sumoylation of transcriptional corepressors and chromatin remodeling enzymes can influence interactions with other transcriptional regulators, and alter their enzymatic activity. In some cases, proteins that are components of transcriptional corepressor complexes have been shown to be SUMO E3 ligases, further emphasizing the integration of sumoylation with the regulation of chromatin remodeling. Despite the evidence suggesting that sumoylation is primarily repressive for access to chromatin, recent analyses suggest that protein sumoylation on the chromatin template may play important roles at highly expressed genes. Elucidating the dynamic interplay of sumoylation with other post-translational modifications of histones and chromatin associated proteins will be key to fully understanding the regulation of access to the chromatin template.
Collapse
|
42
|
Poterlowicz K, Yarker JL, Malashchuk I, Lajoie BR, Mardaryev AN, Gdula MR, Sharov AA, Kohwi-Shigematsu T, Botchkarev VA, Fessing MY. 5C analysis of the Epidermal Differentiation Complex locus reveals distinct chromatin interaction networks between gene-rich and gene-poor TADs in skin epithelial cells. PLoS Genet 2017; 13:e1006966. [PMID: 28863138 PMCID: PMC5599062 DOI: 10.1371/journal.pgen.1006966] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 09/14/2017] [Accepted: 08/08/2017] [Indexed: 02/07/2023] Open
Abstract
Mammalian genomes contain several dozens of large (>0.5 Mbp) lineage-specific gene loci harbouring functionally related genes. However, spatial chromatin folding, organization of the enhancer-promoter networks and their relevance to Topologically Associating Domains (TADs) in these loci remain poorly understood. TADs are principle units of the genome folding and represents the DNA regions within which DNA interacts more frequently and less frequently across the TAD boundary. Here, we used Chromatin Conformation Capture Carbon Copy (5C) technology to characterize spatial chromatin interaction network in the 3.1 Mb Epidermal Differentiation Complex (EDC) locus harbouring 61 functionally related genes that show lineage-specific activation during terminal keratinocyte differentiation in the epidermis. 5C data validated by 3D-FISH demonstrate that the EDC locus is organized into several TADs showing distinct lineage-specific chromatin interaction networks based on their transcription activity and the gene-rich or gene-poor status. Correlation of the 5C results with genome-wide studies for enhancer-specific histone modifications (H3K4me1 and H3K27ac) revealed that the majority of spatial chromatin interactions that involves the gene-rich TADs at the EDC locus in keratinocytes include both intra- and inter-TAD interaction networks, connecting gene promoters and enhancers. Compared to thymocytes in which the EDC locus is mostly transcriptionally inactive, these interactions were found to be keratinocyte-specific. In keratinocytes, the promoter-enhancer anchoring regions in the gene-rich transcriptionally active TADs are enriched for the binding of chromatin architectural proteins CTCF, Rad21 and chromatin remodeler Brg1. In contrast to gene-rich TADs, gene-poor TADs show preferential spatial contacts with each other, do not contain active enhancers and show decreased binding of CTCF, Rad21 and Brg1 in keratinocytes. Thus, spatial interactions between gene promoters and enhancers at the multi-TAD EDC locus in skin epithelial cells are cell type-specific and involve extensive contacts within TADs as well as between different gene-rich TADs, forming the framework for lineage-specific transcription.
Collapse
Affiliation(s)
- Krzysztof Poterlowicz
- Centre for Skin Sciences, Faculty of Life Sciences, University of Bradford, Bradford, United Kingdom
| | - Joanne L. Yarker
- Centre for Skin Sciences, Faculty of Life Sciences, University of Bradford, Bradford, United Kingdom
| | - Igor Malashchuk
- Centre for Skin Sciences, Faculty of Life Sciences, University of Bradford, Bradford, United Kingdom
| | - Brian R. Lajoie
- Program in Systems Biology, University of Massachusetts Medical School, Worcester, Massachusetts, United States of America
| | - Andrei N. Mardaryev
- Centre for Skin Sciences, Faculty of Life Sciences, University of Bradford, Bradford, United Kingdom
| | - Michal R. Gdula
- Department of Biochemistry, University of Oxford, Oxford, United Kingdom
| | - Andrey A. Sharov
- Department of Dermatology, Boston University School of Medicine, Boston, Massachusetts, United States of America
| | - Terumi Kohwi-Shigematsu
- Department of Orofacial Sciences, School of Dentistry, University of California San Francisco, San Francisco, California, United States of America
| | - Vladimir A. Botchkarev
- Centre for Skin Sciences, Faculty of Life Sciences, University of Bradford, Bradford, United Kingdom
- Department of Dermatology, Boston University School of Medicine, Boston, Massachusetts, United States of America
- * E-mail: (MYF); , (VAB)
| | - Michael Y. Fessing
- Centre for Skin Sciences, Faculty of Life Sciences, University of Bradford, Bradford, United Kingdom
- * E-mail: (MYF); , (VAB)
| |
Collapse
|
43
|
Botchkarev VA, Mardaryev AN. Repressing the Keratinocyte Genome: How the Polycomb Complex Subunits Operate in Concert to Control Skin and Hair Follicle Development. J Invest Dermatol 2017; 136:1538-1540. [PMID: 27450498 DOI: 10.1016/j.jid.2016.04.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2016] [Accepted: 04/27/2016] [Indexed: 01/10/2023]
Abstract
The Polycomb group proteins are transcriptional repressors that are critically important in the control of stem cell activity and maintenance of the identity of differentiated cells. Polycomb proteins interact with each other to form chromatin-associated repressive complexes (Polycomb repressive complexes 1 and 2) leading to chromatin compaction and gene silencing. However, the roles of the distinct components of the Polycomb repressive complex 2 in the control of skin development and keratinocyte differentiation remain obscure. Dauber et al. demonstrate the conditional ablations of three essential Polycomb repressive complex 2 subunits (EED, Suz12, or Ezh1/2) in the epidermal progenitors result in quite similar skin phenotypes including premature acquisition of a functional epidermal barrier, formation of ectopic Merkel cells, and defective postnatal hair follicle development. The reported data demonstrate that in skin epithelia, EED, Suz12, and Ezh1/2 function largely as subunits of the Polycomb repressive complex 2, which is important in the context of data demonstrating their independent activities in other cell types. The report provides an important platform for further analyses of the role of distinct Polycomb components in the control of gene expression programs in the disorders of epidermal differentiation, such as psoriasis and epidermal cancer.
Collapse
Affiliation(s)
- Vladimir A Botchkarev
- Centre for Skin Sciences, Faculty of Life Sciences, University of Bradford, Bradford, UK; Department of Dermatology, Boston University School of Medicine, Boston, USA.
| | - Andrei N Mardaryev
- Centre for Skin Sciences, Faculty of Life Sciences, University of Bradford, Bradford, UK
| |
Collapse
|
44
|
D'Arcangelo D, Tinaburri L, Dellambra E. The Role of p16 INK4a Pathway in Human Epidermal Stem Cell Self-Renewal, Aging and Cancer. Int J Mol Sci 2017; 18:ijms18071591. [PMID: 28737694 PMCID: PMC5536078 DOI: 10.3390/ijms18071591] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 07/13/2017] [Accepted: 07/19/2017] [Indexed: 12/31/2022] Open
Abstract
The epidermis is a self-renewing tissue. The balance between proliferation and differentiation processes is tightly regulated to ensure the maintenance of the stem cell (SC) population in the epidermis during life. Aging and cancer may be considered related endpoints of accumulating damages within epidermal self-renewing compartment. p16INK4a is a potent inhibitor of the G1/S-phase transition of the cell cycle. p16INK4a governs the processes of SC self-renewal in several tissues and its deregulation may result in aging or tumor development. Keratinocytes are equipped with several epigenetic enzymes and transcription factors that shape the gene expression signatures of different epidermal layers and allow dynamic and coordinated expression changes to finely balance keratinocyte self-renewal and differentiation. These factors converge their activity in the basal layer to repress p16INK4a expression, protecting cells from senescence, and preserving epidermal homeostasis and regeneration. Several stress stimuli may activate p16INK4a expression that orchestrates cell cycle exit and senescence response. In the present review, we discuss the role of p16INK4a regulators in human epidermal SC self-renewal, aging and cancer.
Collapse
Affiliation(s)
- Daniela D'Arcangelo
- Laboratory of Vascular Pathology, Istituto Dermopatico dell'Immacolata, Istituto di Ricovero e Cura a Carattere Scientifico (IDI-IRCCS), Fondazione Luigi Maria Monti (FLMM), via Monti di Creta 104, 00167 Rome, Italy.
| | - Lavinia Tinaburri
- Molecular and Cell Biology Laboratory, Istituto Dermopatico dell'Immacolata, Istituto di Ricovero e Cura a Carattere Scientifico (IDI-IRCCS), Fondazione Luigi Maria Monti (FLMM), via Monti di Creta 104, 00167 Rome, Italy.
| | - Elena Dellambra
- Molecular and Cell Biology Laboratory, Istituto Dermopatico dell'Immacolata, Istituto di Ricovero e Cura a Carattere Scientifico (IDI-IRCCS), Fondazione Luigi Maria Monti (FLMM), via Monti di Creta 104, 00167 Rome, Italy.
| |
Collapse
|
45
|
Botchkarev VA. The Molecular Revolution in Cutaneous Biology: Chromosomal Territories, Higher-Order Chromatin Remodeling, and the Control of Gene Expression in Keratinocytes. J Invest Dermatol 2017; 137:e93-e99. [PMID: 28411854 DOI: 10.1016/j.jid.2016.04.040] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 03/05/2016] [Accepted: 04/15/2016] [Indexed: 12/16/2022]
Abstract
Three-dimensional organization of transcription in the nucleus and mechanisms controlling the global chromatin folding, including spatial interactions between the genes, noncoding genome elements, and epigenetic and transcription machinery, are essential for establishing lineage-specific gene expression programs during cell differentiation. Spatial chromatin interactions in the nucleus involving gene promoters and distal regulatory elements are currently considered major forces that drive cell differentiation and genome evolution in general, and such interactions are substantially reorganized during many pathological conditions. During terminal differentiation of the epidermal keratinocytes, the nucleus undergoes programmed transformation from highly active status, associated with execution of the genetic program of epidermal barrier formation, to a fully inactive condition and finally becomes a part of the keratinized cells of the cornified epidermal layer. This transition is accompanied by marked remodeling of the three-dimensional nuclear organization and microanatomy, including changes in the spatial arrangement of lineage-specific genes, nuclear bodies, and heterochromatin. This mini-review highlights the important landmarks in the accumulation of our current knowledge on three-dimensional organization of the nucleus, spatial arrangement of the genes, and their distal regulatory elements, and it provides an update on the mechanisms that control higher-order chromatin remodeling in the context of epidermal keratinocyte differentiation in the skin.
Collapse
Affiliation(s)
- Vladimir A Botchkarev
- Centre for Skin Sciences, Faculty of Life Sciences, University of Bradford, Bradford, UK; Department of Dermatology, Boston University School of Medicine, Boston, Massachusetts, USA.
| |
Collapse
|
46
|
Klein RH, Lin Z, Hopkin AS, Gordon W, Tsoi LC, Liang Y, Gudjonsson JE, Andersen B. GRHL3 binding and enhancers rearrange as epidermal keratinocytes transition between functional states. PLoS Genet 2017; 13:e1006745. [PMID: 28445475 PMCID: PMC5425218 DOI: 10.1371/journal.pgen.1006745] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 05/10/2017] [Accepted: 04/05/2017] [Indexed: 11/19/2022] Open
Abstract
Transcription factor binding, chromatin modifications and large scale chromatin re-organization underlie progressive, irreversible cell lineage commitments and differentiation. We know little, however, about chromatin changes as cells enter transient, reversible states such as migration. Here we demonstrate that when human progenitor keratinocytes either differentiate or migrate they form complements of typical enhancers and super-enhancers that are unique for each state. Unique super-enhancers for each cellular state link to gene expression that confers functions associated with the respective cell state. These super-enhancers are also enriched for skin disease sequence variants. GRHL3, a transcription factor that promotes both differentiation and migration, binds preferentially to super-enhancers in differentiating keratinocytes, while during migration, it binds preferentially to promoters along with REST, repressing the expression of migration inhibitors. Key epidermal differentiation transcription factor genes, including GRHL3, are located within super-enhancers, and many of these transcription factors in turn bind to and regulate super-enhancers. Furthermore, GRHL3 represses the formation of a number of progenitor and non-keratinocyte super-enhancers in differentiating keratinocytes. Hence, chromatin relocates GRHL3 binding and enhancers to regulate both the irreversible commitment of progenitor keratinocytes to differentiation and their reversible transition to migration.
Collapse
Affiliation(s)
- Rachel Herndon Klein
- Department of Biological Chemistry, School of Medicine, University of California Irvine, Irvine, California, United States of America
| | - Ziguang Lin
- Department of Biological Chemistry, School of Medicine, University of California Irvine, Irvine, California, United States of America
| | - Amelia Soto Hopkin
- Department of Biological Chemistry, School of Medicine, University of California Irvine, Irvine, California, United States of America
| | - William Gordon
- Department of Biological Chemistry, School of Medicine, University of California Irvine, Irvine, California, United States of America
| | - Lam C. Tsoi
- Department of Dermatology, University of Michigan, Ann Arbor, Michigan, United States of America
- Department of Computational Medicine & Bioinformatics, University of Michigan, Ann Arbor, Michigan, United States of America
- Department of Biostatistics, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Yun Liang
- Department of Dermatology, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Johann E. Gudjonsson
- Department of Dermatology, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Bogi Andersen
- Department of Biological Chemistry, School of Medicine, University of California Irvine, Irvine, California, United States of America
- Center for Complex Biological Systems, University of California Irvine, Irvine, California, United States of America
- Department of Medicine, School of Medicine, University of California Irvine, Irvine, California, United States of America
| |
Collapse
|
47
|
Sumoylation in Development and Differentiation. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 963:197-214. [DOI: 10.1007/978-3-319-50044-7_12] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
48
|
Zhen CY, Tatavosian R, Huynh TN, Duc HN, Das R, Kokotovic M, Grimm JB, Lavis LD, Lee J, Mejia FJ, Li Y, Yao T, Ren X. Live-cell single-molecule tracking reveals co-recognition of H3K27me3 and DNA targets polycomb Cbx7-PRC1 to chromatin. eLife 2016; 5. [PMID: 27723458 PMCID: PMC5056789 DOI: 10.7554/elife.17667] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Accepted: 08/29/2016] [Indexed: 12/11/2022] Open
Abstract
The Polycomb PRC1 plays essential roles in development and disease pathogenesis. Targeting of PRC1 to chromatin is thought to be mediated by the Cbx family proteins (Cbx2/4/6/7/8) binding to histone H3 with a K27me3 modification (H3K27me3). Despite this prevailing view, the molecular mechanisms of targeting remain poorly understood. Here, by combining live-cell single-molecule tracking (SMT) and genetic engineering, we reveal that H3K27me3 contributes significantly to the targeting of Cbx7 and Cbx8 to chromatin, but less to Cbx2, Cbx4, and Cbx6. Genetic disruption of the complex formation of PRC1 facilitates the targeting of Cbx7 to chromatin. Biochemical analyses uncover that the CD and AT-hook-like (ATL) motif of Cbx7 constitute a functional DNA-binding unit. Live-cell SMT of Cbx7 mutants demonstrates that Cbx7 is targeted to chromatin by co-recognizing of H3K27me3 and DNA. Our data suggest a novel hierarchical cooperation mechanism by which histone modifications and DNA coordinate to target chromatin regulatory complexes. DOI:http://dx.doi.org/10.7554/eLife.17667.001
Collapse
Affiliation(s)
- Chao Yu Zhen
- Department of Chemistry, University of Colorado Denver, Denver, United States
| | - Roubina Tatavosian
- Department of Chemistry, University of Colorado Denver, Denver, United States
| | - Thao Ngoc Huynh
- Department of Chemistry, University of Colorado Denver, Denver, United States
| | - Huy Nguyen Duc
- Department of Chemistry, University of Colorado Denver, Denver, United States
| | - Raibatak Das
- Department of Integrative Biology, University of Colorado Denver, Denver, United States
| | - Marko Kokotovic
- Department of Chemistry, University of Colorado Denver, Denver, United States
| | - Jonathan B Grimm
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, United States
| | - Luke D Lavis
- Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, United States
| | - Jun Lee
- Department of Chemistry, University of Colorado Denver, Denver, United States
| | - Frances J Mejia
- Department of Chemistry, University of Colorado Denver, Denver, United States
| | - Yang Li
- Department of Chemistry, University of Colorado Denver, Denver, United States
| | - Tingting Yao
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, United States
| | - Xiaojun Ren
- Department of Chemistry, University of Colorado Denver, Denver, United States
| |
Collapse
|
49
|
Friedenberg SG, Meurs KM, Mackay TFC. Evaluation of artificial selection in Standard Poodles using whole-genome sequencing. Mamm Genome 2016; 27:599-609. [PMID: 27510710 DOI: 10.1007/s00335-016-9660-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 07/28/2016] [Indexed: 12/11/2022]
Abstract
Identifying regions of artificial selection within dog breeds may provide insights into genetic variation that underlies breed-specific traits or diseases-particularly if these traits or disease predispositions are fixed within a breed. In this study, we searched for runs of homozygosity (ROH) and calculated the d i statistic (which is based upon F ST) to identify regions of artificial selection in Standard Poodles using high-coverage, whole-genome sequencing data of 15 Standard Poodles and 49 dogs across seven other breeds. We identified consensus ROH regions ≥1 Mb in length and common to at least ten Standard Poodles covering 0.6 % of the genome, and d i regions that most distinguish Standard Poodles from other breeds covering 3.7 % of the genome. Within these regions, we identified enriched gene pathways related to olfaction, digestion, and taste, as well as pathways related to adrenal hormone biosynthesis, T cell function, and protein ubiquitination that could contribute to the pathogenesis of some Poodle-prevalent autoimmune diseases. We also validated variants related to hair coat and skull morphology that have previously been identified as being under selective pressure in Poodles, and flagged additional polymorphisms in genes such as ITGA2B, CBX4, and TNXB that may represent strong candidates for other common Poodle disorders.
Collapse
Affiliation(s)
- Steven G Friedenberg
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, NC, 27607, USA.
- Comparative Medicine Institute, North Carolina State University, Raleigh, NC, 27607, USA.
| | - Kathryn M Meurs
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, 1060 William Moore Drive, Raleigh, NC, 27607, USA
- Comparative Medicine Institute, North Carolina State University, Raleigh, NC, 27607, USA
| | - Trudy F C Mackay
- Department of Biological Sciences, College of Sciences, North Carolina State University, 3510 Thomas Hall, Raleigh, NC, 27695, USA
- Comparative Medicine Institute, North Carolina State University, Raleigh, NC, 27607, USA
| |
Collapse
|
50
|
Abstract
Mammalian embryonic development is a tightly regulated process that, from a single zygote, produces a large number of cell types with hugely divergent functions. Distinct cellular differentiation programmes are facilitated by tight transcriptional and epigenetic regulation. However, the contribution of epigenetic regulation to tissue homeostasis after the completion of development is less well understood. In this Review, we explore the effects of epigenetic dysregulation on adult stem cell function. We conclude that, depending on the tissue type and the epigenetic regulator affected, the consequences range from negligible to stem cell malfunction and disruption of tissue homeostasis, which may predispose to diseases such as cancer.
Collapse
|