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Ren X, Xu J, Xue Q, Tong Y, Xu T, Wang J, Yang T, Chen Y, Shi D, Li X. BRG1 enhances porcine iPSC pluripotency through WNT/β-catenin and autophagy pathways. Theriogenology 2024; 215:10-23. [PMID: 38000125 DOI: 10.1016/j.theriogenology.2023.11.014] [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: 09/18/2023] [Revised: 11/13/2023] [Accepted: 11/13/2023] [Indexed: 11/26/2023]
Abstract
Brahma-related gene 1 (BRG1) enhances the pluripotency of embryonic and adult stem cells, however, its effect on induced pluripotent stem cell (iPSC) pluripotency has not been reported. The aim of this study was to investigate the effect of BRG1 on porcine iPSC pluripotency and its mechanisms. The effect of BRG1 on porcine iPSC pluripotency was explored by positive and negative control it. The mechanism was investigated by regulating the WNT/β-catenin signaling pathway and autophagy flux. The results showed that inhibition of BRG1 decreased pluripotency-related gene expression in porcine iPSCs; while its overexpression had the opposite effect, the expression of WNT/β-catenin signaling pathway- and autophagy-related genes was significantly up-regulated (P < 0.05) in the BRG1 overexpressed group when compared to the control group. Inhibited pluripotency-related gene or protein expression, decreased autophagy flux, and increased mitochondrial length and mitochondrial membrane potential (MMP) were observed when porcine iPSCs were treated with the WNT/β-catenin signaling pathway inhibitor IWR-1. Forced BRG1 expression restored porcine iPSC pluripotency, increased autophagy flux, shortened mitochondria, and reduced MMP. Lastly, Compound C was used to activate porcine iPSC autophagy, and it was found that the expression of BRG1 and β-catenin increased, and pluripotency-related gene and protein expression was up-regulated; these effects were reversed when the BRG1 inhibitor PFI-3 and IWR-1 were added. These results suggested that BRG1 enhanced the pluripotency of porcine iPSCs through WNT/β-catenin and autophagy pathways.
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Affiliation(s)
- Xuan Ren
- Guangxi Key Laboratory of Animal Breeding and Disease Control, College of Animal Science and Technology, Guangxi University, Nanning, 530005, China
| | - Jianchun Xu
- Guangxi Key Laboratory of Animal Breeding and Disease Control, College of Animal Science and Technology, Guangxi University, Nanning, 530005, China
| | - Qingsong Xue
- Guangxi Key Laboratory of Animal Breeding and Disease Control, College of Animal Science and Technology, Guangxi University, Nanning, 530005, China
| | - Yi Tong
- Guangxi Key Laboratory of Animal Breeding and Disease Control, College of Animal Science and Technology, Guangxi University, Nanning, 530005, China
| | - Tairan Xu
- Guangxi Key Laboratory of Animal Breeding and Disease Control, College of Animal Science and Technology, Guangxi University, Nanning, 530005, China
| | - Jinli Wang
- Guangxi Key Laboratory of Animal Breeding and Disease Control, College of Animal Science and Technology, Guangxi University, Nanning, 530005, China
| | - Ting Yang
- Guangxi Key Laboratory of Animal Breeding and Disease Control, College of Animal Science and Technology, Guangxi University, Nanning, 530005, China
| | - Yuan Chen
- Guangxi Key Laboratory of Animal Breeding and Disease Control, College of Animal Science and Technology, Guangxi University, Nanning, 530005, China
| | - Deshun Shi
- Guangxi Key Laboratory of Animal Breeding and Disease Control, College of Animal Science and Technology, Guangxi University, Nanning, 530005, China
| | - Xiangping Li
- Guangxi Key Laboratory of Animal Breeding and Disease Control, College of Animal Science and Technology, Guangxi University, Nanning, 530005, China.
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Doucet D, Brubaker C, Turner D, Gregory CA. Factors affecting the role of canonical Wnt inhibitor Dickkopf-1 in cancer progression. Front Oncol 2023; 13:1114822. [PMID: 37007131 PMCID: PMC10050559 DOI: 10.3389/fonc.2023.1114822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 03/01/2023] [Indexed: 03/17/2023] Open
Abstract
BackgroundThe canonical Wnt inhibitor Dickkopf-1 (Dkk-1) has the capacity to modulate homeostasis between canonical and non-canonical Wnt pathways and also signal independently of Wnt. The specific effects of Dkk-1 activity on tumor physiology are therefore unpredictable with examples of Dkk-1 serving as either a driver or suppressor of malignancy. Given that Dkk-1 blockade may serve as a potential treatment for some types of cancer, we questioned whether it is possible to predict the role of Dkk-1 on tumor progression based on the tissue origin of the tumor.MethodsOriginal research articles that described Dkk-1 in terms a tumor suppressor or driver of cancer growth were identified. To determine the association between tumor developmental origin and the role of Dkk-1, a logistic regression was performed. The Cancer Genome Atlas database was interrogated for survival statistics based on tumor Dkk-1 expression.ResultsWe report that Dkk-1 is statistically more likely to serve as a suppressor in tumors arising from the ectoderm (p = 0.0198) or endoderm (p = 0.0334) but more likely to serve as a disease driver in tumors of mesodermal origin (p = 0.0155). Survival analyses indicated that in cases where Dkk-1 expression could be stratified, high Dkk-1 expression is usually associated with poor prognosis. This in part may be due to pro-tumorigenic role Dkk-1 plays on tumor cells but also through its influence on immunomodulatory and angiogenic processes in the tumor stroma.ConclusionDkk-1 has a context-specific dual role as a tumor suppressor or driver. Dkk-1 is significantly more likely to serve as a tumor suppressor in tumors arising from ectoderm and endoderm while the converse is true for mesodermal tumors. Patient survival data indicated high Dkk-1 expression is generally a poor prognostic indicator. These findings provide further support for the importance of Dkk-1 as a therapeutic cancer target in some cases.
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Affiliation(s)
- Dakota Doucet
- Medical Sciences Program, Texas A&M Health Science Center School of Medicine, Texas A&M University, Bryan, TX, United States
| | - Connor Brubaker
- Department of Statistics, Texas A&M University, College Station, TX, United States
| | - Donald Turner
- Department of Statistics, Texas A&M University, College Station, TX, United States
| | - Carl A. Gregory
- Department of Cell Biology and Genetics, Texas A&M Health Science Center School of Medicine, Texas A&M University, Bryan, TX, United States
- *Correspondence: Carl A. Gregory,
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Tao SS, Cao F, Sam NB, Li HM, Feng YT, Ni J, Wang P, Li XM, Pan HF. Dickkopf-1 as a promising therapeutic target for autoimmune diseases. Clin Immunol 2022; 245:109156. [DOI: 10.1016/j.clim.2022.109156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 09/24/2022] [Accepted: 10/06/2022] [Indexed: 11/03/2022]
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Yang H, Qin D, Xu S, He C, Sun J, Hua J, Peng S. Folic acid promotes proliferation and differentiation of porcine pancreatic stem cells into insulin-secreting cells through canonical Wnt and ERK signaling pathway. J Steroid Biochem Mol Biol 2021; 205:105772. [PMID: 33091596 DOI: 10.1016/j.jsbmb.2020.105772] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 09/29/2020] [Accepted: 10/04/2020] [Indexed: 11/16/2022]
Abstract
Porcine pancreatic stem cells (pPSCs) can be induced to differentiate into insulin-producing cells in vitro and thus serve as a major cells source for β-cell regeneration. However, this application is limited by the weak cell proliferation ability and low insulin induction efficiency. In this study, we explored the role of folic acid in the proliferation of pPSCs and the formation of insulin-secreting cells. We found that FA-treated pPSCs cells had a high EDU positive rate, and the proliferation marker molecules PCNA, CyclinD1 and c-Myc were up-regulated, while the expression of folate receptor α (FOLRα) was up-regulated. In further research, interference FOLRα or adding canonical Wnt signaling pathway or ERK signaling pathway inhibitors could significantly inhibit the effect of FA on pPSCs proliferation. Meanwhile, during the differentiation of pPSCs into insulin-secreting cells, we found that the maturation marker genes Insulin, NKX6.1, MafA, and NeuroD1 was upregulated in insulin-secreting cell masses differentiationed from pPSCs after FA treatment, and the functional molecules Insulin and C-peptide were increased, the ability to secrete insulin in response to high glucose was also increased. With the addition of Wnt and ERK signaling pathway inhibitors, the pro-differentiation effect of FA was weakened. In conclusion, FA promotes the proliferation of pPSCs by binding to folate receptor α (FOLRα) and increase the efficiency of directed differentiation of pPSCs into insulin-producing cells by regulating canonical Wnt and ERK signaling pathway. This study lays theoretical foundation for solving the bottleneck in the treatment of diabetes with stem cell transplantation in future.
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Affiliation(s)
- Hong Yang
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Dezhe Qin
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Shuanshuan Xu
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Chen He
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Jing Sun
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Jinlian Hua
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Sha Peng
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, PR China.
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Liu LH, Shi RJ, Chen ZC. Paeonol exerts anti‑tumor activity against colorectal cancer cells by inducing G0/G1 phase arrest and cell apoptosis via inhibiting the Wnt/β‑catenin signaling pathway. Int J Mol Med 2020; 46:675-684. [PMID: 32626954 PMCID: PMC7307818 DOI: 10.3892/ijmm.2020.4629] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 05/19/2020] [Indexed: 12/15/2022] Open
Abstract
Paeonol is a simple phenolic compound isolated from herbal root bark, which has been reported to possess numerous biological and pharmacological characteristics, including a desirable anti‑tumor effect. To date, the effect of paeonol against colorectal cancer (CRC) cells is yet to be fully elucidated. Therefore, the present study aimed to identify the underlying mechanism via which paeonol exerts its anti‑tumor activity on HCT116 cells. After incubation with various concentrations of paeonol (7.8125, 15.625, 31.25, 62.5, 125, 250 and 500 µg/ml), the inhibitory effect of paeonol on cell viability was assessed using a Cell Counting Kit‑8 assay. Cell apoptosis and cell cycle distribution were measured using flow cytometry. Moreover, caspase activity was measured using a colorimetric caspase assay. Luciferase assay was also used to determine the β‑catenin‑mediated transcriptional activity of T‑cell specific transcription factor/lymphoid‑enhancer binding factor (TCF/LEF), and western blotting analysis was performed to measure the related expression of proteins. The results indicated that paeonol exhibited a notable effect against HCT116 cells by inducing G0/G1‑phase arrest, as demonstrated by downregulation of the cell cycle regulators cyclin‑dependent kinase 4 and cyclin D1 and upregulation of p21Cip1 in a dose‑dependent manner. Furthermore, paeonol dose‑dependently induced cell apoptosis, accompanied by an increase in the Bax/Bcl‑2 ratio, release of cytochrome c and further activation of caspases. Paeonol also dose‑dependently blocked the activation of the Wnt/β‑catenin signaling pathway by suppressing the expression of β‑catenin, resulting in a decrease in β‑catenin‑mediated activity of TCF/LEF and downregulation of downstream target genes, including cyclin D1, survivin and c‑Myc. Therefore, the present results suggested that paeonol exerted its anti‑tumor effects on CRC cells, including the inhibition of cell proliferation, induction of cell cycle arrest and initiation of apoptosis, at least partly by suppressing the Wnt/β‑catenin pathway, which may offer a promising therapeutic strategy for CRC.
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Affiliation(s)
- Li-Hua Liu
- No. 1 Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210029
| | - Ren-Jie Shi
- No. 1 Clinical Medical College, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210029
- Department of Anorectal Surgery, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023
| | - Zhi-Cheng Chen
- Department of Anorectal Surgery, Zhongda Hospital Affiliated to Southeast University, Nanjing, Jiangsu 210009, P.R. China
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Wnt Signaling Protects against Paclitaxel-Induced Spiral Ganglion Neuron Damage in the Mouse Cochlea In Vitro. BIOMED RESEARCH INTERNATIONAL 2019; 2019:7878906. [PMID: 31687397 PMCID: PMC6800971 DOI: 10.1155/2019/7878906] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 07/25/2019] [Accepted: 09/13/2019] [Indexed: 11/22/2022]
Abstract
It has been reported that paclitaxel administration could cause sensorineural hearing loss, and Wnt activation is important for the development and cell protection of mouse cochlea. However, the effect of Wnt signaling in spiral ganglion neurons (SGNs) damage induced by paclitaxel has not yet been elucidated. In this study, we explored the effect of paclitaxel on SGNs in the mouse cochlea and the neuroprotective effects of Wnt signaling pathway against paclitaxel-induced SGN damage by using Wnt agonist/antagonists in vitro. We first found that paclitaxel treatment resulted in a degenerative change and reduction of cell numbers in SGNs and induced caspase-mediated apoptosis in SGNs. The expression levels of β-catenin and C-myc were increased, thus indicating Wnt signaling was activated in SGNs after paclitaxel treatment. The activation of Wnt signaling pathway protected against SGN loss after exposure to paclitaxel, whereas the suppression of Wnt signaling in SGNs made them more vulnerable to paclitaxel treatment. We also showed that activation of Wnt signaling in SGNs inhibited caspase-mediated apoptosis. Our findings demonstrated that Wnt signaling had an important role in protecting SGNs against paclitaxel-induced damage and thus might be an effective therapeutic target for the prevention of paclitaxel-induced SGN death.
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Pizzute T, He F, Zhang XB, Pei M. Impact of Wnt signals on human intervertebral disc cell regeneration. J Orthop Res 2018; 36:3196-3207. [PMID: 30035326 PMCID: PMC7261601 DOI: 10.1002/jor.24115] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 07/16/2018] [Indexed: 02/04/2023]
Abstract
Although preconditioning strategies are growing areas of interest for therapies targeting intervertebral discs (IVDs), it is unknown whether the Wnt signals previously implicated in chondrogenesis, Wnt3A, Wnt5A, and Wnt11, play key roles in the promotion of human nucleus pulposus (NP) cell redifferentiation. In this study, NP cells isolated from herniated disc patients were transduced with lentiviral vectors to overexpress the WNT3A, WNT5A, or WNT11 genes, or CRISPR associated protein 9 (Cas9)/single-guide RNA (sgRNA) vectors to knock out these genes. Following expansion, transduced NP cells were induced for redifferentiation toward the NP phenotype. The overexpression of specific WNT factors led to increases in both glycosaminoglycan (GAG) deposition and expression of redifferentiation genes. These effects were attenuated by knockout of the same WNT genes. These results indicate that specific WNT signals can regulate the expression of redifferentiation genes, unequally impact GAG deposition, and contribute to the redifferentiation of human NP cells. © 2018 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 36:3196-3207, 2018.
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Affiliation(s)
- Tyler Pizzute
- Stem Cell and Tissue Engineering Laboratory, Department of Orthopaedics, West Virginia University, Morgantown, WV, USA;,Exercise Physiology, West Virginia University, Morgantown, WV, USA
| | - Fan He
- Orthopaedic Institute, Medical College, Soochow University, Suzhou, China
| | - Xiao-Bing Zhang
- State Key Laboratory of Experimental Hematology, Tianjin, China;,Department of Medicine, Loma Linda University, Loma Linda, CA, USA;,Co-Corresponding Author: Xiao-Bing Zhang PhD, Division of Regenerative Medicine MC 1528B, Department of Medicine, Loma Linda University, 11234 Anderson Street, Loma Linda, CA 92350, USA,
| | - Ming Pei
- Stem Cell and Tissue Engineering Laboratory, Department of Orthopaedics, West Virginia University, Morgantown, WV, USA;,Exercise Physiology, West Virginia University, Morgantown, WV, USA;,WVU Cancer Institute, Robert C. Byrd Health Sciences Center, West Virginia University, Morgantown, WV, USA,Corresponding author: Ming Pei MD, PhD, Stem Cell and Tissue Engineering Laboratory, Department of Orthopaedics, West Virginia University, PO Box 9196, One Medical Center Drive, Morgantown, WV 26506-9196, USA, Telephone: 304-293-1072; Fax: 304-293-7070;
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Jiang WJ, Peng YC, Yang KM. Cellular signaling pathways regulating β-cell proliferation as a promising therapeutic target in the treatment of diabetes. Exp Ther Med 2018; 16:3275-3285. [PMID: 30233674 PMCID: PMC6143874 DOI: 10.3892/etm.2018.6603] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 07/27/2018] [Indexed: 12/30/2022] Open
Abstract
It is established that a decrease in β-cell number and deficiency in the function of existing β-cells contribute to type 1 and type 2 diabetes mellitus. Therefore, a major focus of current research is to identify novel methods of improving the number and function of β-cells, so as to prevent and/or postpone the development of diabetes mellitus and potentially reverse diabetes mellitus. Based on prior knowledge of the above-mentioned causes, promising therapeutic approaches may include direct transplantation of islets, implantation and subsequent induced differentiation of progenitors/stem cells to β-cells, replication of pre-existing β-cells, or activation of endogenous β-cell progenitors. More recently, with regards to cell replacement and regenerative treatment for diabetes patients, the identification of cellular signaling pathways with related genes or corresponding proteins involved in diabetes has become a topic of interest. However, the majority of pathways and molecules associated with β-cells remain unresolved, and the specialized functions of known pathways remain unclear, particularly in humans. The current article has evaluated the progress of research on pivotal cellular signaling pathways involved with β-cell proliferation and survival, and their validity for therapeutic adult β-cell regeneration in diabetes. More efforts are required to elucidate the cellular events involved in human β-cell proliferation in terms of the underlying mechanisms and functions.
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Affiliation(s)
- Wen-Juan Jiang
- Institute of Anatomy, Basic Medical College of Dali University, Dali, Yunnan 671000, P.R. China
| | - Yun-Chuan Peng
- Institute of Anatomy, Basic Medical College of Dali University, Dali, Yunnan 671000, P.R. China
| | - Kai-Ming Yang
- Institute of Anatomy, Basic Medical College of Dali University, Dali, Yunnan 671000, P.R. China
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Li B, He X, Zhuang M, Niu B, Wu C, Mu H, Tang F, Cui Y, Liu W, Zhao B, Peng S, Li G, Hua J. Melatonin Ameliorates Busulfan-Induced Spermatogonial Stem Cell Oxidative Apoptosis in Mouse Testes. Antioxid Redox Signal 2018; 28:385-400. [PMID: 28027652 DOI: 10.1089/ars.2016.6792] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
AIMS Many men endure immunosuppressive or anticancer treatments that contain alkylating agents before the age of sexual maturity, especially the increasing number of preadolescent males who undergo busulfan treatment for myeloablative conditioning before hematopoietic stem cell transplantation. Before sperm production, there are no sperm available for cryopreservation. Thus, it is necessary to identify a solution to ameliorate the busulfan-induced damage of spermatogonial stem cells (SSCs). RESULTS In this study, we demonstrated that melatonin relieved the previously described SSC loss and apoptosis in mouse testes. Melatonin increased the expression of manganese superoxide dismutase (MnSOD), which regulated the production of busulfan-induced reactive oxygen species (ROS). Moreover, melatonin promoted sirtuin type 1 (SIRT1) expression. SIRT1 participated in the deacetylation of p53, which promotes p53 ubiquitin degradation. Decreased concentrations of deacetylated p53 resulted in spermatogonial cell resistance to apoptosis. Acute T cell leukemia cell assay demonstrated that melatonin does not affect busulfan-induced cancer cell apoptosis and ROS. INNOVATION The current evidence suggests that melatonin may alleviate the side effects of alkylating drugs, such as busulfan. CONCLUSION Melatonin promoted MnSOD and SIRT1 expression, which successfully ameliorated busulfan-induced SSC apoptosis caused by high concentrations of ROS and p53. Antioxid. Redox Signal. 28, 385-400.
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Affiliation(s)
- Bo Li
- 1 College of Veterinary Medicine, Shaanxi Centre of Stem Cell Engineering and Technology, Northwest A&F University , Yangling, Shaanxi, China
| | - Xin He
- 1 College of Veterinary Medicine, Shaanxi Centre of Stem Cell Engineering and Technology, Northwest A&F University , Yangling, Shaanxi, China
| | - Mengru Zhuang
- 1 College of Veterinary Medicine, Shaanxi Centre of Stem Cell Engineering and Technology, Northwest A&F University , Yangling, Shaanxi, China
| | - Bowen Niu
- 1 College of Veterinary Medicine, Shaanxi Centre of Stem Cell Engineering and Technology, Northwest A&F University , Yangling, Shaanxi, China
| | - Chongyang Wu
- 1 College of Veterinary Medicine, Shaanxi Centre of Stem Cell Engineering and Technology, Northwest A&F University , Yangling, Shaanxi, China
| | - Hailong Mu
- 1 College of Veterinary Medicine, Shaanxi Centre of Stem Cell Engineering and Technology, Northwest A&F University , Yangling, Shaanxi, China
| | - Furong Tang
- 1 College of Veterinary Medicine, Shaanxi Centre of Stem Cell Engineering and Technology, Northwest A&F University , Yangling, Shaanxi, China
| | - Yanhua Cui
- 1 College of Veterinary Medicine, Shaanxi Centre of Stem Cell Engineering and Technology, Northwest A&F University , Yangling, Shaanxi, China
| | - Weishuai Liu
- 3 Department of Pathology, Yangling Demonstration Zone Hospital , Yangling, Shaanxi, China
| | - Baoyu Zhao
- 1 College of Veterinary Medicine, Shaanxi Centre of Stem Cell Engineering and Technology, Northwest A&F University , Yangling, Shaanxi, China
| | - Sha Peng
- 1 College of Veterinary Medicine, Shaanxi Centre of Stem Cell Engineering and Technology, Northwest A&F University , Yangling, Shaanxi, China
| | - Guangpeng Li
- 2 Key Laboratory for Mammalian Reproductive Biology and Biotechnology, Ministry of Education, Inner Mongolia University , Hohhot, China
| | - Jinlian Hua
- 1 College of Veterinary Medicine, Shaanxi Centre of Stem Cell Engineering and Technology, Northwest A&F University , Yangling, Shaanxi, China
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The aldehyde group of gossypol induces mitochondrial apoptosis via ROS-SIRT1-p53-PUMA pathway in male germline stem cell. Oncotarget 2017; 8:100128-100140. [PMID: 29245965 PMCID: PMC5725007 DOI: 10.18632/oncotarget.22044] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 10/05/2017] [Indexed: 01/14/2023] Open
Abstract
As a widely grown economic crop, cotton is the major oil and protein resource for human and livestock. But the highly toxic of gossypol in cottonseed severely restricts its effective utilization, consequently creating huge resource waste. Previous studies have shown the male germline stem cells were the most vulnerable cells in gossypol damages, but the mechanism was still unclear. We found gossypol induced cell viability decline resulted from apoptosis. And the increase of Caspase-9 activity in gossypol treatment hinted the mitochondrial apoptosis. So the mitochondrial dysfunction was confirmed by the decreased mitochondrial membrane potential and ATP concentration. We found the higher intracellular H2O2 level did not accompany with the O2·- associated increase in gossypol-treated, which indicated that gossypol obstructed the intracellular reactive oxygen species (ROS) elimination. Manipulated gossypol-induced H2O2 level by H2O2 and α-lipoic acid, we demonstrated that the mitochondrial dysfunction resulted from the excessive intracellular H2O2. Treated with Apogossypolone (ApoG2), an aldehyde group removed derivative of gossypol, the GSH/GSSG ratio and H2O2 did not decrease. ApoG2 also did not cause the mitochondrial apoptosis. So the aldehyde group is key factor in gossypol cytotoxicity. We respectively detected the NAD+/NADH ratio, SIRT1 activity, the relative protein level and apoptosis. Comparing with the specific inhibitors groups, the data illustrated that gossypol induced apoptosis through SIRT1-P53-PUMA pathway. This study helped to overcome barriers of gossypol cytotoxicity, which is crucial in feed and food use of cottonseed. This also provides a reference for the gossypol derivatives using in male contraception and anticancer.
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Wang X, Peng Q, Jiang F, Xue L, Li J, Fan Z, Chen P, Chen G, Cai Y. Secreted frizzled-related protein 5 protects against oxidative stress-induced apoptosis in human aortic endothelial cells via downregulation of Bax. J Biochem Mol Toxicol 2017; 31. [PMID: 28834606 DOI: 10.1002/jbt.21978] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 08/01/2017] [Indexed: 12/14/2022]
Abstract
This study was undertaken to determine the role of secreted frizzled-related protein 5 (SFRP5) in endothelial oxidative injury. Human aortic endothelial cells (HAECs) were exposed to different oxidative stimuli and examined for SFRP5 expression. The effects of SFRP5 overexpression and knockdown on cell viability, apoptosis, and reactive oxygen species production were measured. HAECs treated with angiotensin (Ang) II (1 μM) or oxidized low-density lipoprotein (oxLDL) (150 μg/mL) showed a significant increase in SFRP5 expression. Overexpression of SFRP5 significantly attenuated the viability suppression and apoptosis induction by Ang II and oxLDL, whereas the knockdown of SFRP5 exerted opposite effects. Overexpression of SFRP5 prevented ROS formation and β-catenin activation and reduced Bax expression. Co-expression of Bax significantly reversed the anti-apoptotic effect of SFRP5 overexpression, whereas knockdown of Bax restrained Ang II- and oxLDL-induced apoptosis in HAECs. Taken together, SFRP5 confers protection against oxidative stress-induced apoptosis through inhibition of β-catenin activation and downregulation of Bax.
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Affiliation(s)
- Xiaojie Wang
- Department of Endocrinology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Qing Peng
- Department of Cardiology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Feng Jiang
- Department of Cardiology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Li Xue
- Department of Cardiology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Jiafu Li
- Department of Cardiology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Zhongcai Fan
- Department of Cardiology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Pan Chen
- Department of Endocrinology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Guo Chen
- Department of Endocrinology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
| | - Yihua Cai
- Department of Cardiology, The Affiliated Hospital, Southwest Medical University, Luzhou, China
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Hu S, Zhang M, Sun F, Ren L, He X, Hua J, Peng S. miR-375 controls porcine pancreatic stem cell fate by targeting 3-phosphoinositide-dependent protein kinase-1 (Pdk1). Cell Prolif 2017; 49:395-406. [PMID: 27218665 DOI: 10.1111/cpr.12263] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Accepted: 04/10/2016] [Indexed: 12/11/2022] Open
Abstract
OBJECTIVES miR-375 is one of the highly expressed microRNAs (miRNAs) found in pancreatic islets of both humans and mice. In this study, we investigated functions of miRNA miR-375 in porcine pancreatic stem cells (PSC). MATERIALS AND METHODS We transfected mimic and inhibitor of miR-375 in PSCs to measure functional roles of the microRNA and its effects on cell cycle proliferation and cell differentiation were determined. Luciferase assays were also performed to reveal the target gene of miR-375. RESULTS Overexpression of miR-375 suppressed proliferation, promoted apoptosis and inhibited differentiation into islet-like cells. PDK1 was identified as being a target of miR-375. Furthermore, we found that overexpression of miR-375 inhibited activation of the PDK1-AKT signalling pathway. CONCLUSION miR-375 directly targeted PDK1 in porcine PSCs, suppressing cell proliferation and differentiation into islet-like cells.
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Affiliation(s)
- Shuxian Hu
- College of Veterinary Medicine, Shaanxi Center of Stem Cells Engineering and Technology, Key Lab for Animal Biotechnology of Agriculture Ministry of China, Northwest A&F University, Yangling, Shaanxi, China
| | - Mingzhi Zhang
- College of Veterinary Medicine, Shaanxi Center of Stem Cells Engineering and Technology, Key Lab for Animal Biotechnology of Agriculture Ministry of China, Northwest A&F University, Yangling, Shaanxi, China
| | - Fen Sun
- College of Veterinary Medicine, Shaanxi Center of Stem Cells Engineering and Technology, Key Lab for Animal Biotechnology of Agriculture Ministry of China, Northwest A&F University, Yangling, Shaanxi, China
| | - Lipeng Ren
- College of Veterinary Medicine, Shaanxi Center of Stem Cells Engineering and Technology, Key Lab for Animal Biotechnology of Agriculture Ministry of China, Northwest A&F University, Yangling, Shaanxi, China
| | - Xin He
- College of Veterinary Medicine, Shaanxi Center of Stem Cells Engineering and Technology, Key Lab for Animal Biotechnology of Agriculture Ministry of China, Northwest A&F University, Yangling, Shaanxi, China
| | - Jinlian Hua
- College of Veterinary Medicine, Shaanxi Center of Stem Cells Engineering and Technology, Key Lab for Animal Biotechnology of Agriculture Ministry of China, Northwest A&F University, Yangling, Shaanxi, China
| | - Sha Peng
- College of Veterinary Medicine, Shaanxi Center of Stem Cells Engineering and Technology, Key Lab for Animal Biotechnology of Agriculture Ministry of China, Northwest A&F University, Yangling, Shaanxi, China
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Ren L, Han W, Yang H, Sun F, Xu S, Hu S, Zhang M, He X, Hua J, Peng S. Autophagy stimulated proliferation of porcine PSCs might be regulated by the canonical Wnt signaling pathway. Biochem Biophys Res Commun 2016; 479:537-543. [PMID: 27664705 DOI: 10.1016/j.bbrc.2016.09.105] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Accepted: 09/20/2016] [Indexed: 02/07/2023]
Abstract
Porcine pancreatic stem cells (PSCs) are one kind of the potential cells for treatment of human diabetes. Autophagy is a highly conserved cellular degradation process in which it helps to maintain the balance between the synthesis, degradation and subsequent recycling of cellular components. However, how autophagy contributes to PSCs has not yet been investigated. Here, we established GFP-LC3 transfected porcine PSC lines in which the accumulation of autophagosomes can be efficiently visualized to evaluate the autophagic activity. Moreover, we observed that starved PSCs which showed increased autophagic activity exhibited an increased tendency to proliferate through the results of BrdU, flow cytometry and western blotting. Furthermore, increased expression of active β-catenin after inducing autophagy indicated that it might be the canonical Wnt signaling that autophagy activated to exert the function on the stimulation of PSCs proliferation. Collectively, these results demonstrated that autophagy stimulated proliferation of PSCs might be regulated by the canonical Wnt signaling pathway. Our results for the first time shed light on a role of autophagy for stimulating the proliferation of porcine PSCs.
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Affiliation(s)
- Lipeng Ren
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Wei Han
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Hong Yang
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Fen Sun
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Shuanshuan Xu
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Shuxian Hu
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Mingzhi Zhang
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Xin He
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, PR China
| | - Jinlian Hua
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, PR China.
| | - Sha Peng
- College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering & Technology, Northwest A&F University, Yangling, Shaanxi, 712100, PR China.
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14
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Emerging Role and Therapeutic Implication of Wnt Signaling Pathways in Autoimmune Diseases. J Immunol Res 2016; 2016:9392132. [PMID: 27110577 PMCID: PMC4826689 DOI: 10.1155/2016/9392132] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 03/05/2016] [Accepted: 03/09/2016] [Indexed: 12/13/2022] Open
Abstract
The Wnt signaling pathway plays a key role in many biological aspects, such as cellular proliferation, tissue regeneration, embryonic development, and other systemic effects. Under a physiological condition, it is tightly controlled at different layers and arrays, and a dysregulated activation of this signaling has been implicated into the pathogenesis of various human disorders, including autoimmune diseases. Despite the fact that therapeutic interventions are available for ameliorating disease manifestations, there is no curative therapy currently available for autoimmune disorders. Increasing lines of evidence have suggested a crucial role of Wnt signaling during the pathogenesis of many autoimmune diseases; in addition, some of microRNAs (miRNAs), a class of small, noncoding RNA molecules capable of transcriptionally regulating gene expression, have also recently been demonstrated to possess both physiological and pathological roles in autoimmune diseases by regulating the Wnt signaling pathway. This review summarizes currently our understanding of the pathogenic roles of Wnt signaling in several major autoimmune disorders and miRNAs, those targeting Wnt signaling in autoimmune diseases, with a focus on the implication of the Wnt signaling as potential biomarkers and therapeutic targets in immune diseases, as well as miRNA-mediated regulation of Wnt signaling activation in the development of autoimmune diseases.
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