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Dou Z, Lu F, Hu J, Li B, Li X. CBX7 silencing promoted liver regeneration by interacting with BMI1 and activating the Nrf2/ARE signaling pathway. Sci Rep 2024; 14:11008. [PMID: 38744845 PMCID: PMC11094083 DOI: 10.1038/s41598-024-58248-8] [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: 08/23/2023] [Accepted: 03/27/2024] [Indexed: 05/16/2024] Open
Abstract
Multiple studies have shown knockdown of chromobox 7 (CBX7) promotes the regenerative capacity of various cells or tissues. We examined the effect of CBX7 on hepatocyte proliferation and liver regeneration after 2/3 hepatectomy in a mouse model. For in vitro experiments, NCTC 1469 and BNL CL.2 hepatocytes were co-transfected with siRNA-CBX7-1 (si-CBX7-1), siRNA-CBX7-2 (si-CBX7-2), pcDNA-CBX7, si-BMI1-1, si-BMI1-2, pcDNA-BMI1, or their negative control. For in vivo experiments, mice were injected intraperitoneally with lentivirus-packaged shRNA and shRNA CBX7 before hepatectomy. Our results showed that CBX7 was rapidly induced in the early stage of liver regeneration. CBX7 regulated hepatocyte proliferation, cell cycle, and apoptosis of NCTC 1469 and BNL CL.2 hepatocytes. CBX7 interacted with BMI1 and inhibited BMI1 expression in hepatocytes. Silencing BMI1 aggregated the inhibitory effect of CBX7 overexpression on hepatocyte viability and the promotion of apoptosis. Furthermore, silencing BMI1 enhanced the regulatory effect of CBX7 on Nrf2/ARE signaling in HGF-induced hepatocytes. In vivo, CBX7 silencing enhanced liver/body weight ratio in PH mice. CBX7 silencing promoted the Ki67-positive cell count and decreased the Tunel-positive cell count after hepatectomy, and also increased the expression of nuclear Nrf2, HO-1, and NQO-1. Our results suggest that CBX7 silencing may increase survival following hepatectomy by promoting liver regeneration.
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Affiliation(s)
- Zhimin Dou
- The First School of Clinical Medicine, Lanzhou University, No. 199, Donggang West Road, Chengguan District, Lanzhou, 730000, Gansu, China
- Department of Critical Care Medicine, The First Hospital of Lanzhou University, Lanzhou, 730000, China
| | - Fei Lu
- The First School of Clinical Medicine, Lanzhou University, No. 199, Donggang West Road, Chengguan District, Lanzhou, 730000, Gansu, China
| | - Jinjing Hu
- Key Laboratory of Biotherapy and Regenerative Medicine of Gansu Province, No. 1 Donggang West Road, Chengguan District, Lanzhou, 730000, Gansu, China
| | - Bin Li
- Department of Critical Care Medicine, The First Hospital of Lanzhou University, Lanzhou, 730000, China
| | - Xun Li
- The First School of Clinical Medicine, Lanzhou University, No. 199, Donggang West Road, Chengguan District, Lanzhou, 730000, Gansu, China.
- Key Laboratory of Biotherapy and Regenerative Medicine of Gansu Province, No. 1 Donggang West Road, Chengguan District, Lanzhou, 730000, Gansu, China.
- Department of General Surgery, The First Hospital of Lanzhou University, No. 1 Donggang West Road, Chengguan District, Lanzhou, 730000, Gansu, China.
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2
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Quisiguiña Salem C, Ruiz Delgado E, Crespo Reinoso PA, Robalino JJ. Alveolar ridge preservation: A review of concepts and controversies. Natl J Maxillofac Surg 2023; 14:167-176. [PMID: 37661984 PMCID: PMC10474543 DOI: 10.4103/njms.njms_224_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 03/06/2023] [Accepted: 04/10/2023] [Indexed: 09/05/2023] Open
Abstract
The loss of thickness and height of the alveolar process after tooth extraction is a significant impediment to implant placement, which limits the aesthetic results of many restorative treatments. Alveolar ridge preservation can reduce bone resorption. Knowing how beneficial this procedure is can help clinicians decide if it is worth doing. The purpose of this article is to present a contemporary review of the different approaches to preserving the dimensions of the alveolar ridge. We analyze the alveolar healing process, atraumatic extraction techniques, graft materials, and controversies.
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Affiliation(s)
- Cinthya Quisiguiña Salem
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Universidad Nacional Autónoma de México, Ciudad Universitaria, México
| | - Emilio Ruiz Delgado
- Department of Prosthodontics and Implantology, Faculty of Dentistry, Universidad de Cuenca, Cuenca, Ecuador
| | - Pablo A. Crespo Reinoso
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Universidad de Cuenca, Cuenca, Ecuador
| | - James Jerez Robalino
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Universidad Nacional Autónoma de México, Ciudad Universitaria, México
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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: 56] [Impact Index Per Article: 18.7] [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.
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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
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4
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Strauss FJ, Stähli A, Kobatake R, Tangl S, Heimel P, Apaza Alccayhuaman KA, Schosserer M, Hackl M, Grillari J, Gruber R. miRNA-21 deficiency impairs alveolar socket healing in mice. J Periodontol 2020; 91:1664-1672. [PMID: 32396233 PMCID: PMC7818433 DOI: 10.1002/jper.19-0567] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 02/25/2020] [Accepted: 03/02/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND MicroRNAs (miRNAs) are small noncoding RNAs demonstrated as critical post-transcriptional modulators in dental tissues and bone regeneration, particularly miR-21-5p. However, the role of miR-21-5p in the healing of alveolar sockets following tooth extraction remains unknown. In this study we evaluated the influence of miR-21-5p in the healing of alveolar socket after tooth extraction. METHODS Eight miR-21-5p knockout mice and eight littermate controls underwent tooth extraction of the upper right incisor. After a healing period of 14 days microCT and histological analyses were performed. RESULTS MicroCT analysis showed that the percentage of bone in the extraction socket was significantly higher in the control group than in the miR-21 knockout mice; either in the coronal (39.0%, CI 31.8 to 48.0 versus 23.0%, CI 17.8 to 35.2, P = 0.03) or in the middle part of the alveolar socket (56.0%, CI 50.9 to 62.5 versus 43.5% CI 28.6 to 54.6, P = 0.03). These differences were not noted in the apical part of the extraction socket. Histological analysis supported the microCT findings. Newly bone volume per tissue volume (BV/TV) was significantly higher in the control group when compared to miR-21 knockout mice, 27.4% (CI 20.6 to 32.9) versus 19.0% (CI 14.7 to 21.5, P < 0.05), respectively. Surprisingly, no evident signs of buccal bone resorption were observed in both groups. CONCLUSION Despite the limitation of one observation period, these findings suggest that miR-21-5p delays the early healing of alveolar socket following tooth extraction. Whether miR-21-5p is essential for healing of alveolar sockets remains to be elucidated.
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Affiliation(s)
- Franz Josef Strauss
- Department of Oral Biology, Medical University of Vienna, Vienna, Vienna, Austria.,Department of Conservative Dentistry, School of Dentistry, University of Chile, Santiago, Chile.,Clinic of Reconstructive Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| | - Alexandra Stähli
- Department of Periodontology, School of Dental Medicine, University of Bern, Bern, Switzerland
| | - Reiko Kobatake
- Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Hiroshima, Japan
| | - Stefan Tangl
- Karl Donath Laboratory for Hard Tissue and Biomaterial Research, Division of Oral Surgery, School of Dentistry, Medical University of Vienna, Wein, Wein, Austria.,Austrian Cluster for Tissue Regeneration, Medical University of Vienna, Vienna, Austria
| | - Patrick Heimel
- Karl Donath Laboratory for Hard Tissue and Biomaterial Research, Division of Oral Surgery, School of Dentistry, Medical University of Vienna, Wein, Wein, Austria.,Austrian Cluster for Tissue Regeneration, Medical University of Vienna, Vienna, Austria.,Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria
| | | | - Markus Schosserer
- Institute of Molecular Biotechnology, University of Natural Resources and Life Sciences, Vienna, Vienna, Austria
| | | | - Johannes Grillari
- Austrian Cluster for Tissue Regeneration, Medical University of Vienna, Vienna, Austria.,Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria.,Institute of Molecular Biotechnology, University of Natural Resources and Life Sciences, Vienna, Vienna, Austria
| | - Reinhard Gruber
- Department of Oral Biology, Medical University of Vienna, Vienna, Vienna, Austria.,Department of Periodontology, School of Dental Medicine, University of Bern, Bern, Switzerland.,Austrian Cluster for Tissue Regeneration, Medical University of Vienna, Vienna, Austria
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Zhang Y, Zu D, Chen Z, Ying G. An update on Wnt signaling pathway in cancer. Transl Cancer Res 2020; 9:1246-1252. [PMID: 35117469 PMCID: PMC8797977 DOI: 10.21037/tcr.2019.12.50] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 12/03/2019] [Indexed: 12/12/2022]
Abstract
Wnt signaling involves many aspects of development, cell biology and physiology. Mutations in the Wnt gene can lead to abnormal embryonic development and cancer formation, including various aspects that affect proliferation, morphogenesis, and differentiation. The occurrence and development of tumors is a complex process involving multiple factors. The Wnt signaling pathway participates in this process as an anti-tumor target by activating multiple gene transcriptions. The emergence of Wnt pathway inhibitors and targeted drugs has opened up a new world of cancer treatment. This review focuses on the mechanism of action of the Wnt signaling pathway in different cancers. Secondly, we have organized and introduced the latest Wnt anti-tumor drugs.
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Affiliation(s)
- Yanlu Zhang
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China
| | - Dan Zu
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China
| | - Zhe Chen
- First Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Guoqing Ying
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou 310014, China
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6
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Yang X, Zhou Z, Mao Z, Shen M, Chen N, Miao D. Role of p53 deficiency in socket healing after tooth extractions. J Mol Histol 2020; 51:55-65. [PMID: 32006186 DOI: 10.1007/s10735-020-09856-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 01/26/2020] [Indexed: 12/17/2022]
Abstract
p53 is known to advance the cell arrest and cell senescence in human tumors. In this study, we displayed that osteogenic ability of p53-knockout (p53-/-) mice was significantly increased in the tooth extraction socket compared with wild-type (WT) counterparts. Bone marrow mesenchymal stem cells (BM-MSCs) from mandibular were collected and exhibited with elevated proliferation potential and colony-forming units compared with the control, as well as stronger mineral deposits and osteogenic markers. Besides, the bone mass and bone parameter in p53-/- mice were markedly enhanced compared with the counterpart after extractions by micro-CT. Masson's trichrome staining and immunohistochemistry also revealed that new bone filling and osterix/osteocalcin (Osx/OCN)-immunopositive staining in p53-/- mice were remarkably increased at each time point. Furthermore, consistent with the enhanced osteogenic markers, the angiogenic marker of blood vessels (alpha smooth muscle actin, α-SMA) was significantly elevated in p53-/- mice in contrast to WT mice. Importantly, we found that the osteoclast numbers exhibited an increased trend in p53-/- mice compared with WT mice during socket healing. Collectively, our result suggest that p53 deficiency could promote the osteogenesis and angiogenesis in the tooth extraction socket and might lend possibility for p53-based therapeutic approaches in acceleration of extraction bone healing.
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Affiliation(s)
- Xiaohan Yang
- The Research Center for Bone and Stem Cells, Nanjing Medical University, Nanjing, China.,Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, No. 140, Han Zhong Road, Nanjing, 210029, People's Republic of China.,Department of Stomatology, The Second Affiliated Hospital of Nanjing Medical University, No. 262, Zhong Shan North Road, Nanjing, 210003, People's Republic of China
| | - Zhixuan Zhou
- Department of Polyclinic, Affiliated Hospital of Stomatology, Nanjing Medical University, No. 136, Han Zhong Road, Nanjing, 210029, People's Republic of China
| | - Zhiyuan Mao
- The Research Center for Bone and Stem Cells, Nanjing Medical University, Nanjing, China.,Department of Stomatology, The Second Affiliated Hospital of Nanjing Medical University, No. 262, Zhong Shan North Road, Nanjing, 210003, People's Republic of China
| | - Ming Shen
- Department of Polyclinic, Affiliated Hospital of Stomatology, Nanjing Medical University, No. 136, Han Zhong Road, Nanjing, 210029, People's Republic of China
| | - Ning Chen
- Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, No. 140, Han Zhong Road, Nanjing, 210029, People's Republic of China. .,Department of Dental Implant, Affiliated Hospital of Stomatology, Nanjing Medical University, No. 136, Han Zhong Road, Nanjing, 210029, People's Republic of China.
| | - Dengshun Miao
- The Research Center for Bone and Stem Cells, Nanjing Medical University, Nanjing, China. .,Department of Stomatology, The Second Affiliated Hospital of Nanjing Medical University, No. 262, Zhong Shan North Road, Nanjing, 210003, People's Republic of China.
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