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Li J, Fang Z, Dal E, Zhang H, Yu K, Ma M, Wang M, Sun R, Lu M, Wang H, Li Y. Transmembrane protein 176B regulates amino acid metabolism through the PI3K-Akt-mTOR signaling pathway and promotes gastric cancer progression. Cancer Cell Int 2024; 24:95. [PMID: 38438907 PMCID: PMC10913232 DOI: 10.1186/s12935-024-03279-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 02/19/2024] [Indexed: 03/06/2024] Open
Abstract
BACKGROUND The present study aimed to investigate the expression level, biological function, and underlying mechanism of transmembrane protein 176B (TMEM176B) in gastric cancer (GC). METHODS TMEM176B expression was detected by quantitative real-time polymerase chain reaction (qRT-PCR) and western blotting (WB). The function of TMEM176B was determined by various in vitro assays including colony formation, 5-ethynyl-2'-deoxyuridine (EdU), Transwell, and flow cytometry. Bioinformatics techniques were then used to elucidate the signaling pathways associated with TMEM176B activity. Tumor formation experiments were conducted on nude mice for in vivo validation of the preceding findings. TMEM176B expression was cross-referenced to clinicopathological parameters and survival outcomes. RESULTS It was observed that TMEM176B was overexpressed in GC cells and tissues. Targeted TMEM176B abrogation inhibited colony formation, proliferation, migration, and invasion but promoted apoptosis in GC cell lines while TMEM176B overexpression had the opposite effects. Subsequent experimental validation disclosed an association between TMEM176B and the phosphatidylinositol 3-carboxykinase (PI3K)-protein kinase B (Akt)-mammalian target of rapamycin (mTOR) signaling axis. Moreover, TMEM176B affects GC cancer progression by regulating asparagine synthetase (ASNS). The in vivo assays confirmed that TMEM176B is oncogenic and the clinical data revealed a connection between TMEM176B expression and the clinicopathological determinants of GC. CONCLUSION The foregoing results suggest that TMEM176B significantly promotes the development of gastric cancer and is an independent prognostic factor of it.
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Affiliation(s)
- Jing Li
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
| | - ZiQing Fang
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
| | - Emre Dal
- University of Utah, Salt Lake City, UT, 84102, USA
| | - Hao Zhang
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
| | - KeXun Yu
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
| | - MengDi Ma
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
| | - MingLiang Wang
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
| | - Ruochuan Sun
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
| | - MingDian Lu
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
| | - HuiZhen Wang
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China.
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China.
| | - YongXiang Li
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China.
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China.
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Han L, Chen S, Du SY. Role of inositol polyphosphate-4-phosphatase type II in oncogenesis of digestive system tumors. World J Gastrointest Oncol 2023; 15:1706-1716. [PMID: 37969410 PMCID: PMC10631434 DOI: 10.4251/wjgo.v15.i10.1706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 08/22/2023] [Accepted: 09/19/2023] [Indexed: 10/10/2023] Open
Abstract
Inositol polyphosphate-4-phosphatase type II (INPP4B) is a newly discovered PI(3,4,5)P3 phosphatase. Many studies have revealed that INPP4B is upregulated or downregulated in tumors of the digestive system, and the abnormal expression of INPP4B may be attributed to the occurrence, development, and prognosis of tumors of the digestive system. This paper reviews studies on the correlations between INPP4B and digestive system tumors and the roles of INPP4B in the development of different tumors to provide a theoretical basis for further research on its molecular mechanism and clinical application. "INPP4B" and "tumor" were searched as key words in PubMed and in the CNKI series full text database retrieval system from January 2000 to August 2023. A total of 153 English-language studies and 30 Chinese-language studies were retrieved. The following enrollment criteria were applied: (1) Studies contained information on the biological structure and functions of INPP4B; (2) studies covered the influence of abnormal expression of INPP4B in digestive system tumors; and (3) studies covered the role of INPP4B in the diagnosis, treatment, and prognosis of digestive system tumors. After excluding the literature irrelevant to this study, 61 papers were finally included in the analysis. INPP4B expression is low in gastric cancer, colon cancer, pancreatic cancer, and liver cancer but it has high expression in esophageal cancer, colon cancer, pancreatic cancer, and gallbladder cancer. INPP4B is involved in the occurrence and development of digestive system tumors through the regulation of gene expression and signal transduction. The abnormal expression of INPP4B plays an important role in the development of digestive system tumors. Studies on INPP4B provide new molecular insights for the diagnosis, treatment, and prognosis evaluation of digestive system tumors.
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Affiliation(s)
- Le Han
- Peking University China-Japan Friendship School of Clinical Medicine, Peking University, Beijing 100029, China
| | - Shuo Chen
- Department of Gastroenterology, China-Japan Friendship Hospital, Beijing 100029, China
| | - Shi-Yu Du
- Department of Gastroenterology, China-Japan Friendship Hospital, Beijing 100029, China
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Yu Z, Wang H, You G. The regulation of human organic anion transporter 4 by insulin-like growth factor 1 and protein kinase B signaling. Biochem Pharmacol 2023; 215:115702. [PMID: 37487877 PMCID: PMC10528241 DOI: 10.1016/j.bcp.2023.115702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 07/07/2023] [Accepted: 07/21/2023] [Indexed: 07/26/2023]
Abstract
Human organic anion transporter 4 (hOAT4), mainly expressed in the kidney and placenta, is essential for the disposition of numerous drugs, toxins, and endogenous substances. Insulin-like growth factor 1 (IGF-1) is a hormone generated in the liver and plays important roles in systemic growth, development, and metabolism. In the current study, we explored the regulatory effects of IGF-1 and downstream signaling on the transport activity, protein expression, and SUMOylation of hOAT4. We showed that IGF-1 significantly increased the transport activity, expression, and maximal transport velocity Vmax of hOAT4 in kidney-derived cells. This stimulatory effect of IGF-1 on hOAT4 activity was also confirmed in cells derived from the human placenta. The increased activity and expression were correlated well with the reduced degradation rate of hOAT4 at the cell surface. Furthermore, IGF-1 significantly increased hOAT4 SUMOylation, and protein kinase B (PKB)-specific inhibitors blocked the IGF-1-induced regulations on hOAT4. In conclusion, our study demonstrates that the hepatic hormone IGF-1 regulates hOAT4 expressed in the kidney and placenta through the PKB signaling pathway. Our results support the remote sensing and signaling theory, where OATs play a central role in the remote communications among distal tissues.
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Affiliation(s)
- Zhou Yu
- Department of Pharmaceutics, Rutgers, The State University of New Jersey, 160 Frelinghuysen Road, Piscataway, NJ 08854, USA
| | - Haoxun Wang
- Department of Pharmaceutics, Rutgers, The State University of New Jersey, 160 Frelinghuysen Road, Piscataway, NJ 08854, USA
| | - Guofeng You
- Department of Pharmaceutics, Rutgers, The State University of New Jersey, 160 Frelinghuysen Road, Piscataway, NJ 08854, USA.
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Ezzat GM, Nassar AY, Bakr MH, Mohamed S, Nassar GA, Kamel AA. Acetylated Oligopeptide and N-acetyl cysteine Protected Against Oxidative Stress, Inflammation, Testicular-Blood Barrier Damage, and Testicular Cell Death in Iron-Overload Rat Model. Appl Biochem Biotechnol 2023:10.1007/s12010-023-04457-2. [PMID: 36947366 DOI: 10.1007/s12010-023-04457-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/15/2023] [Indexed: 03/23/2023]
Abstract
Multiple organs, including the testes, are damaged by iron overload. It has been shown that N-acetyl cysteine (NAC) influences oxidative stress in iron overload. The present study aimed to evaluate the roles of acetylated peptide (AOP) and NAC in the inhibition of iron-overload induced-testicular damage. At the beginning of the experiment, NAC (150 mg /kg) was given for a week to all 40 rats. Then, four groups were formed by dividing the animals (10 rats/group). Group I included healthy control rats. Group II (iron overload) was given intraperitoneal iron dextran (60 mg/kg/day) 5 days a week for 4 weeks. Group III (NAC) was given NAC orally at a dose of 150 mg/kg/day for 4 weeks in addition to iron dextran. Group IV (AOP) was given AOP orally at a dose of 150 mg/kg/day for 4 weeks besides iron dextran. When the experiment time was over, testosterone serum level, testicular B cell lymphoma-2 (BCL-2) and protein kinase B (PKB) protein levels, nuclear factor kappa-B (NF-κB), and Beclin1 mRNA expression levels, and malondialdehyde (MDA), and reduced glutathione (GSH) were determined by ELISA, quantitative reverse transcription-PCR, and chemical methods. Finally, histopathological examinations and immunohistochemical detection of claudin-1 and CD68 were performed. The iron overload group exhibited decreased testosterone, BCL-2, PKB, claudin-1, and GSH and increased MDA, NF-κB, Beclin1, and CD68, while both NAC and AOP treatments protected against the biochemical and histopathological disturbances occurring in the iron overload model. We concluded that NAC and AOP can protect against testes damage by iron overload via their antioxidant, anti-inflammatory, antiapoptotic, and ant-autophagic properties. The NAC and AOP may be used as preventative measures against iron overload-induced testicular damage.
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Affiliation(s)
- Ghada M Ezzat
- Department of Medical Biochemistry and Molecular Biology, Faculty of Medicine, Assiut University, Assiut, Egypt.
| | - Ahmed Y Nassar
- Department of Medical Biochemistry and Molecular Biology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Marwa H Bakr
- Department of Histology and Cell Biology, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Shimma Mohamed
- Department of Medical Biochemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt
| | - Gamal A Nassar
- Metabolic and Genetic disorders unit, Faculty of Medicine, Assiut University, Assiut, Egypt
| | - Amira A Kamel
- Department of Medical Biochemistry and Molecular Biology, Faculty of Medicine, Assiut University, Assiut, Egypt
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Samborowska E, Olek RA. Twenty-Four Weeks of L-Carnitine Combined with Leucine Supplementation Does Not Increase the Muscle Carnitine Content in Healthy Active Subjects. Ann Nutr Metab 2023; 79:219-227. [PMID: 36696886 DOI: 10.1159/000529333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 01/16/2023] [Indexed: 01/26/2023]
Abstract
INTRODUCTION To increase the total carnitine (TC) content in muscles, L-carnitine (LC) should be co-ingested with carbohydrates to induce an insulin response. Leucine has an insulin secretagogue effect. Therefore, the primary aim of this study was to examine the effects of 24 weeks of LC and leucine supplementation on the skeletal muscle TC content, muscle mass, and strength in active college-aged subjects. The secondary aim was to determine the activation of the Akt/mTOR signaling pathway in skeletal muscles after supplementation. METHODS Over the 24 weeks, the participants were supplemented with either 1 g of LC-L-tartrate and 3 g of leucine per day (LC + L group; n = 7) or 4 g of leucine per day (L group; n = 7) as a placebo. Before and 24 weeks after the initiation of the study protocol, the free carnitine (FC) and TC content in plasma and muscle samples, as well as body composition and muscle strength, were measured. In addition, the phosphorylation of the Akt/mTOR pathway proteins in muscles was evaluated. RESULTS Plasma FC and TC content increased in LC + L group after 24 weeks of supplementation (p = 0.003 and 0.010, respectively). However, the skeletal muscle FC and TC contents were not affected by the supplementation protocol. No changes were noted in the body mass and composition; serum insulin-like growth factor-1 concentration; and phosphorylation of the signaling pathway proteins Akt, mTOR, and p70S6K. CONCLUSION LC supplementation may have the potential to exert beneficial effects in muscle atrophy. Therefore, additional research is necessary to investigate the effect of various LC supplementation protocols.
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Affiliation(s)
- Emilia Samborowska
- Mass Spectrometry Laboratory, Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | - Robert A Olek
- Department of Athletics, Strength, and Conditioning, Poznan University of Physical Education, Poznan, Poland
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Yu Z, Zhang J, Liang Z, Wu J, Liu K, You G. Pancreatic Hormone Insulin Modulates Organic Anion Transporter 1 in the Kidney: Regulation via Remote Sensing and Signaling Network. AAPS J 2023; 25:13. [PMID: 36627500 PMCID: PMC10695010 DOI: 10.1208/s12248-022-00778-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 12/09/2022] [Indexed: 01/11/2023] Open
Abstract
Organic anion transporter 1 (OAT1) expressed in the kidney plays an important role in the elimination of numerous anionic drugs used in the clinic. We report here that insulin, a pancreas-secreted hormone, regulated the expression and activity of kidney-specific OAT1 both in cultured cells and in rats. We showed that treatment of OAT1-expressing cells with insulin led to an increase in OAT1 expression, transport activity, and SUMOylation. Such insulin-induced increase was blocked by afuresertib, a specific inhibitor for protein kinase B (PKB), suggesting insulin regulates OAT1 through PKB signaling pathway. Furthermore, insulin stimulated transport activity and SUMOylation of endogenously expressed OAT1 in rat kidneys. In conclusion, our data support a remote sensing and signaling model, in which OAT1 plays an essential role in intercellular and inter-organ communication and in maintaining local and whole-body homeostasis. Such complex and dedicated communication is carried out by insulin, and PKB signaling and membrane sorting.
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Affiliation(s)
- Zhou Yu
- Department of Pharmaceutics, Rutgers, The State University of New Jersey, 160 Frelinghuysen Road, Piscataway, New Jersey, 08854, USA
| | - Jinghui Zhang
- Department of Pharmaceutics, Rutgers, The State University of New Jersey, 160 Frelinghuysen Road, Piscataway, New Jersey, 08854, USA
| | - Zhengxuan Liang
- Department of Pharmaceutics, Rutgers, The State University of New Jersey, 160 Frelinghuysen Road, Piscataway, New Jersey, 08854, USA
| | - Jingjing Wu
- College of Pharmacy, Dalian Medical University, Dalian, China
| | - Kexin Liu
- College of Pharmacy, Dalian Medical University, Dalian, China
| | - Guofeng You
- Department of Pharmaceutics, Rutgers, The State University of New Jersey, 160 Frelinghuysen Road, Piscataway, New Jersey, 08854, USA.
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Tsai YL, Wang CY, Chuang FH, Pan YH, Lin YR, Dhingra K, Liao PS, Huang FS, Chang MC, Jeng JH. Stimulation phosphatidylinositol 3-kinase/ protein kinase B signaling by Porphyromonas gingivalis lipopolysacch aride mediates interleukin-6 and interleukin-8 mRNA/protein expression in pulpal inflammation. J Formos Med Assoc 2023; 122:47-57. [PMID: 36031486 DOI: 10.1016/j.jfma.2022.08.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 07/23/2022] [Accepted: 08/07/2022] [Indexed: 01/28/2023]
Abstract
BACKGROUND/PURPOSE The signaling mechanisms for Porphyromonas gingivalis lipopolysaccharide (PgLPS)-induced inflammation in human dental pulp cells are not fully clarified. This in vitro study aimed to evaluate the involvement of phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt) pathway in PgLPS-induced pulpal inflammation. METHODS Human dental pulp cells (HDPCs) were challenged with PgLPS with or without pretreatment and coincubation with a PI3K/Akt inhibitor (LY294002). The gene or protein levels of PI3K, Akt, interleukin (IL)-6, IL-8, alkaline phosphatase (ALP), osteocalcin and osteonectin were analyzed by reverse transcription polymerase chain reaction (PCR), real-time PCR, western blotting, and immunofluorescent staining. In addition, an enzyme-linked immunosorbent assay was used to analyze IL-6 and IL-8 levels in culture medium. RESULTS In response to 5 μg/ml PgLPS, IL-6, IL-8, and PI3K, but not Akt mRNA expression of HDPCs, was upregulated. IL-6, IL-8, PI3K, and p-Akt protein levels were stimulated by 10-50 μg/ml of PgLPS in HDPCs. PgLPS also induced IL-6 and IL-8 secretion at concentrations higher than 5 μg/ml. Pretreatment and co-incubation by LY294002 attenuated PgLPS-induced IL-6 and IL-8 mRNA expression in HDPCs. The mRNA expression of ALP, but not osteocalcin and osteonectin, was inhibited by higher concentrations of PgLPS in HDPCs. CONCLUSION P. gingivalis contributes to pulpal inflammation in HDPCs by dysregulating PI3K/Akt signaling pathway to stimulate IL-6 and IL-8 mRNA/protein expression and secretion. These results are useful for understanding the pulpal inflammation and possible biomarkers of inflamed pulp diagnosis and treatment.
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Affiliation(s)
- Yi-Ling Tsai
- Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan; School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chen-Ying Wang
- Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan; School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Fu-Hsiung Chuang
- School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Dentistry, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Yu-Hwa Pan
- Department of Dentistry, Chang Gung Memorial Hospital, Taipei, Taiwan
| | - Yan-Ru Lin
- Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan; School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Kunaal Dhingra
- Periodontics Division, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, India
| | - Pai-Shien Liao
- Shu-Zen Junior College of Medicine and Management, Kaohsiung, Taiwan
| | - Fong-Shung Huang
- Department of Integrated Diagnostics and Therapeutics, National Taiwan University Hospital, Taipei, Taiwan
| | - Mei-Chi Chang
- Department of Dentistry, Chang Gung Memorial Hospital, Taipei, Taiwan; Chang Gung University of Science and Technology, Taoyuan, Taiwan.
| | - Jiiang-Huei Jeng
- Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan; School of Dentistry, College of Medicine, National Taiwan University, Taipei, Taiwan; School of Dentistry, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; Department of Dentistry, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.
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Cho YA, Ko IG, Jin JJ, Hwang L, Kim SH, Jeon JW, Yang MJ, Kim CJ. Polydeoxyribonucleotide ameliorates alcoholic liver injury though suppressing phosphatidylinositol 3-kinase/ protein kinase B signaling pathway in mice. J Exerc Rehabil 2022; 18:350-355. [PMID: 36684531 PMCID: PMC9816614 DOI: 10.12965/jer.2244504.252] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Accepted: 11/03/2022] [Indexed: 12/29/2022] Open
Abstract
Polydeoxyribonucleotide (PDRN), which is adenosine A2A receptor agonist, facilitates healing and inhibits inflammation and apoptosis. The effect of PDRN on alcoholic liver injury (ALI) was evaluated focusing on the phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt) signaling pathway. The mice were given daily oral administration of 50% ethanol at a dose of 4 g/kg during 8 weeks. After 4 weeks of alcohol intake, 200 μL of normal saline containing 8-mg/kg PDRN was intraperitoneally administered 3 times a week for 4 weeks. To determine whether the action of PDRN occurs through the adenosine A2A receptor, 8-mg/kg 3,7-dimethyl-1-propargylxanthine (DMPX) with PDRN was treated. The concentration of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) was detected. For liver histopathological score, hematoxylin and eosin staining was conducted. Enzyme-linked immunoassay was used to measure cyclic adenosine-3',5'-monophosphate (cAMP) concentration. PI3K and Akt expression was determined using Western blot analysis. In the results, PDRN treatment suppressed AST and ALT level in serum and liver tissue, and improved damaged liver tissue and decreased histological score. PDRN application inhibited the expression of phosphorylated PI3K/Akt signaling pathway. The increasing effect of PDRN on cAMP level ats as a mechanism for ALI treatment. Co-treatment of DMPX with PDRN did not reduce apoptosis, causing no improvement in liver function. As a result of this experiment, PDRN has the potential to be selected as a therapeutic agent for ALI.
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Affiliation(s)
- Young-A Cho
- Department of Physiology, College of Medicine, Kyung Hee University, Seoul,
Korea
| | - Il-Gyu Ko
- Department of Physiology, College of Medicine, Kyung Hee University, Seoul,
Korea
| | - Jun-Jang Jin
- Department of Physiology, College of Medicine, Kyung Hee University, Seoul,
Korea
| | - Lakkyong Hwang
- Department of Physiology, College of Medicine, Kyung Hee University, Seoul,
Korea
| | - Sang-Hoon Kim
- Department of Physiology, College of Medicine, Kyung Hee University, Seoul,
Korea,Department of Sport and Health Sciences, College of Art and Culture, Sangmyung University, Seoul,
Korea
| | - Jung Won Jeon
- Department of Internal Medicine, Kyung Hee University Hospital at Gangdong, College of Medicine, Kyung Hee University, Seoul,
Korea
| | - Myoung Joo Yang
- Department of Sports Science, Hongik University, Sejong,
Korea
| | - Chang-Ju Kim
- Department of Physiology, College of Medicine, Kyung Hee University, Seoul,
Korea,Corresponding author: Chang-Ju Kim, Department of Physiology, College of Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02447, Korea,
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Al Abadey A, Connor B, Flamme ACL, Robichon K. Clozapine reduces chemokine-mediated migration of lymphocytes by targeting NF-κB and AKT phosphorylation. Cell Signal 2022; 99:110449. [PMID: 36031090 DOI: 10.1016/j.cellsig.2022.110449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 08/11/2022] [Accepted: 08/22/2022] [Indexed: 11/27/2022]
Abstract
Multiple sclerosis is a disease characterised by demyelination of axons in the central nervous system. The atypical antipsychotic drug clozapine has been shown to attenuate disease severity in experimental autoimmune encephalomyelitis (EAE), a mouse model that is useful for the study of multiple sclerosis. However, the mechanism of action by which clozapine reduces disease in EAE is poorly understood. To better understand how clozapine exerts its protective effects, we investigated the underlying signalling pathways by which clozapine may reduce immune cell migration by evaluating chemokine and dopamine receptor-associated signalling pathways. We found that clozapine inhibits migration of immune cells by reducing chemokine production in microglia cells by targeting NF-κB phosphorylation and promoting an anti-inflammatory milieu. Furthermore, clozapine directly targets immune cell migration by changing Ca2+ levels within immune cells and reduces the phosphorylation of signalling protein AKT. Linking these pathways to the antagonising effect of clozapine on dopamine and serotonin receptors, we provide insight into how clozapine alters immune cells migration by directly targeting the underlying migration-associated pathways.
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Affiliation(s)
- Afnan Al Abadey
- School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand; Centre for Biodiscovery Wellington, Victoria University of Wellington, Wellington, New Zealand
| | - Bronwen Connor
- Department of Pharmacology and Clinical Pharmacology, Centre for Brain Research, University of Auckland, Auckland, New Zealand
| | - Anne Camille La Flamme
- School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand; Centre for Biodiscovery Wellington, Victoria University of Wellington, Wellington, New Zealand; Malaghan Institute of Medical Research, Wellington, New Zealand
| | - Katharina Robichon
- School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand; Centre for Biodiscovery Wellington, Victoria University of Wellington, Wellington, New Zealand.
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Gan X, Huang H, Wen J, Liu K, Yang Y, Li X, Fang G, Liu Y, Wang X. α-Terthienyl induces prostate cancer cell death through inhibiting androgen receptor expression. Biomed Pharmacother 2022; 152:113266. [PMID: 35691152 DOI: 10.1016/j.biopha.2022.113266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 05/30/2022] [Accepted: 06/06/2022] [Indexed: 11/28/2022] Open
Abstract
Prostate cancer is a disease that often occurs in elderly men. Androgen receptor signaling pathway runs through the occurrence and development of prostate cancer. Thereby, targeting androgen receptor is a crucial strategy for the treatment of prostate cancer. α-Terthienyl, which has been used as photosensitive activator and insecticide, is a natural compound rich in marigold. In the present study, we found α- terthienyl could inhibit the cell viability of four prostate cancer cell lines, especially on LNCaP and 22Rv1 cells which endogenously express androgen receptor. Then we proved that it could inhibit the proliferation of prostate cancer cells and induce apoptosis of prostate cancer cells by plate clone formation assay and flow cytometry respectively. Furthermore, we found α-terthienyl could inhibit androgen receptor nuclear translocation, reduce androgen receptor expression, reduce the mRNA and protein expression of androgen receptor target genes (KLK3, TMPRSS2, PCA3) and nuclear proliferation antigen Ki67 and PCNA. In addition, it inhibited the expression and phosphorylation of Akt protein while increasing the expression of tumor suppressor p27. Besides, we constructed a mouse xenograft prostate cancer model and confirmed that α-terthienyl also inhibited the growth of prostate cancer in vivo. In conclusively, α-terthienyl played an anti-prostate cancer role by inhibiting both the expression of androgen receptor and the transduction of its signal pathway, suggesting that it is a promising natural small molecule for the treatment of prostate cancer.
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Affiliation(s)
- Xia Gan
- Guangxi Zhuang Yao Medicine Center of Engineering and Technology, Guangxi University of Chinese Medicine, 13 Wuhe Road, Qingxiu District, Nanning 530200, China; Institute of Marine Drugs, Guangxi University of Chinese Medicine, 13 Wuhe Road, Qingxiu District, Nanning 530200, China
| | - Hailing Huang
- Guangxi Zhuang Yao Medicine Center of Engineering and Technology, Guangxi University of Chinese Medicine, 13 Wuhe Road, Qingxiu District, Nanning 530200, China
| | - Jing Wen
- Guangxi Zhuang Yao Medicine Center of Engineering and Technology, Guangxi University of Chinese Medicine, 13 Wuhe Road, Qingxiu District, Nanning 530200, China
| | - Kai Liu
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, 13 Wuhe Road, Qingxiu District, Nanning 530200, China
| | - Yuting Yang
- Guangxi Zhuang Yao Medicine Center of Engineering and Technology, Guangxi University of Chinese Medicine, 13 Wuhe Road, Qingxiu District, Nanning 530200, China
| | - Xiaoning Li
- School of Foreign Languages, Nanning Normal University, 3 Hexing Road, Qingxiu District, Nanning 530299, China
| | - Gang Fang
- Guangxi Zhuang Yao Medicine Center of Engineering and Technology, Guangxi University of Chinese Medicine, 13 Wuhe Road, Qingxiu District, Nanning 530200, China.
| | - Yonghong Liu
- Institute of Marine Drugs, Guangxi University of Chinese Medicine, 13 Wuhe Road, Qingxiu District, Nanning 530200, China; CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.
| | - Xueni Wang
- Guangxi Zhuang Yao Medicine Center of Engineering and Technology, Guangxi University of Chinese Medicine, 13 Wuhe Road, Qingxiu District, Nanning 530200, China; CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.
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Fukuyama K, Okada M. High frequency oscillations play important roles in development of epileptogenesis/ictogenesis via activation of astroglial signallings. Biomed Pharmacother 2022; 149:112846. [PMID: 35325849 DOI: 10.1016/j.biopha.2022.112846] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 03/16/2022] [Accepted: 03/18/2022] [Indexed: 11/24/2022] Open
Abstract
To explore developmental processes of epileptogenesis/ictogenesis and pathophysiology of carbamazepine-resistant epilepsy, we determined effects of high-frequency-oscillation (HFO) on glutamatergic tripartite-synaptic transmission, astroglial expression of connexin43, and intracellular Erk- and Akt-signalling, using genetic rat model (S286L-TG) of autosomal-dominant sleep-related hypermotor epilepsy(ADSHE), which bears rat S286L-mutant Chrna4(corresponding to human S284L-mutant CHRNA4). Artificial physiological ripple- and pathological fast-ripple-burst stimulations use-dependently increased L-glutamate release through connexin43-containing hemichannels by enhancing Erk-signalling alone or both ERK- and Akt-signalling together, respectively. Stimulatory effects of HFO-bursts on astroglial L-glutamate release were enhanced by increasing extracellular K+ levels, Akt- and Erk-signalling-dependently. HFO-bursts also activated connexin43 expression and Akt- and Erk-signallings use-dependently. Extracellular pH elevation enhanced HFO-burst-evoked astroglial L-glutamate release, which was suppressed by therapeutically-relevant concentration of zonisamide via possible carbonic-anhydrase inhibition, but not by that of carbamazepine. Unexpectedly, these responses of S286L-TG to HFO-bursts were almost equal to those of wild-type astrocytes. These results indicated that candidate pathomechanism/pathophysiology of carbamazepine-resistant ADSHE, which enhanced HFO-bursts in S286L-TG neurons may contribute to epileptogenesis/ictogenesis development via activation of connexin43-associated astroglial transmission, which was directly unaffected by mutation, and induced through activated Erk-signalling, followed by Akt-signalling. Therefore, suppression of overexpressed Erk-signalling probably prevents ADSHE onset via indirect inhibition of mutant CHRNA4-associated pathomechanistic developments.
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Zhang K, Ge W, Luo S, Zhou Z, Liu Y. Static Magnetic Field Promotes Proliferation, Migration, Differentiation, and AKT Activation of Periodontal Ligament Stem Cells. Cells Tissues Organs 2022; 212:317-326. [PMID: 35344952 PMCID: PMC10534995 DOI: 10.1159/000524291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 02/04/2022] [Indexed: 11/19/2022] Open
Abstract
Periodontal ligament stem cells (PDLSCs) possess self-renewal and multilineage differentiation potential and exhibit great potential for the treatment of bone tissue defects caused by inflammation. Previous studies have indicated that static magnetic field (SMF) can enhance the proliferation and differentiation of mesenchymal stem cells (MSCs). SMF has been widely used to repair bone defects and for orthodontic and implantation treatment. In this study, we revealed that a 320 mT SMF upregulates the protein expression levels of cytokines such as MCM7 and PCNA in proliferating PDLSCs. Cell counting kit-8 results revealed that the SMF group had higher optical density values than the control group. The ratio of cells in the S phase to those in the G2/M phase was significantly increased after exposure to a 320 mT SMF. In scratch assays, the SMF-treated PDLSCs exhibited a higher migration rate than the sham-exposed group after 24 h of culture, indicating that the SMF promoted the migratory ability of PDLSCs. The activity level of the early differentiation marker alkaline phosphatase and the late marker matrix mineralization, as well as osteoblast-specific gene and protein expression, were enhanced in PDLSCs exposed to the SMF. Furthermore, AKT signaling pathway was activated by SMF. Our data demonstrated that the potential mechanism of action of SMF may enhance PDLSCs proliferation and osteogenic differentiation by activating the phosphorylated AKT pathway. The elucidation of this molecular mechanism may lead to a better understanding of bone repair responses and aid in improved stem cell-mediated regeneration.
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Affiliation(s)
- Kun Zhang
- School and Hospital of Stomatology, Kunming Medical University, Kunming, China
| | - WenBin Ge
- School and Hospital of Stomatology, Kunming Medical University, Kunming, China
| | - ShiTong Luo
- School and Hospital of Stomatology, Kunming Medical University, Kunming, China
| | - Zhi Zhou
- Department of Orthodontics, Affiliated Hospital of Yunnan University, Kunming, China
| | - YaLi Liu
- School and Hospital of Stomatology, Kunming Medical University, Kunming, China
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Li HX, Shi L, Liang SJ, Fang CC, Xu QQ, Lu G, Wang Q, Cheng J, Shen J, Shen MH. Moxibustion alleviates decreased ovarian reserve in rats by restoring the PI3K/AKT signaling pathway. J Integr Med 2022; 20:163-172. [PMID: 35153135 DOI: 10.1016/j.joim.2022.01.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 11/18/2021] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Moxibustion, a common therapy in traditional Chinese medicine, has potential benefits for treating decreased ovarian reserve (DOR). The present study investigates the protective effect of moxibustion in a rat model of DOR and explores the possible mechanisms. METHODS Sixty-four female Sprague-Dawley rats were randomly divided into four groups: control, DOR, moxibustion (MOX), and hormone replacement therapy (HRT). The DOR rat model was established by intragastric administration of 50 mg/kg Tripterygium glycoside suspension (TGS), once daily for 14 days. MOX and HRT treatments were given from the day TGS administration was initiated. The ovarian reserve function was evaluated by monitoring the estrus cycle, morphological changes in ovaries, levels of serum estradiol (E2), follicle-stimulating hormone (FSH), luteinizing hormone (LH), and anti-Mullerian hormone (AMH), pregnancy rate and embryo numbers. Terminal-deoxynucleotidyl transferase-mediated nick-end-labeling staining was used to identify ovarian granulosa cell apoptosis, while the protein and mRNA expressions of Bax, B-cell lymphoma-2 (Bcl-2), phosphatidylinositol 3-kinase (PI3K) and protein kinase B (AKT) in ovarian tissues were examined by immunohistochemistry, Western blot and quantitative reverse transcription-polymerase chain reaction. RESULTS Compared with the DOR group, MOX improved the disordered estrous cycle, promoted follicular growth, reduced the number of atresia follicles, increased the concentrations of serum E2 and AMH, and decreased serum FSH and LH concentrations. More importantly, the pregnancy rate and embryo numbers in DOR rats were both upregulated in the MOX treatment group, compared to the untreated DOR model. Further, we found that the MOX group had reduced apoptosis of ovarian granulosa cells, increased Bcl-2 expression and reduced expression of Bax. Furthermore, the PI3K/AKT signaling pathway was triggered by the moxibustion treatment. CONCLUSION Moxibustion improved ovarian function and suppressed apoptosis of ovarian granulosa cells in a rat model of DOR induced by TGS, and the mechanism may involve the PI3K/AKT signaling pathway.
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Affiliation(s)
- Hong-Xiao Li
- College of Acupuncture, Moxibustion and Tuina, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China; Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China
| | - Ling Shi
- College of Acupuncture, Moxibustion and Tuina, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China; Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China
| | - Shang-Jie Liang
- College of Acupuncture, Moxibustion and Tuina, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China; Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China
| | - Chen-Chen Fang
- College of Acupuncture, Moxibustion and Tuina, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China; Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China
| | - Qian-Qian Xu
- School of Traditional Chinese Medicine & School of Integrated Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China
| | - Ge Lu
- College of Acupuncture, Moxibustion and Tuina, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China; Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China
| | - Qian Wang
- College of Acupuncture, Moxibustion and Tuina, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China; Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China
| | - Jie Cheng
- College of Acupuncture, Moxibustion and Tuina, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China; Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China
| | - Jie Shen
- College of Acupuncture, Moxibustion and Tuina, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China; Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China.
| | - Mei-Hong Shen
- College of Acupuncture, Moxibustion and Tuina, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China; Key Laboratory of Acupuncture and Medicine Research of Ministry of Education, Nanjing University of Chinese Medicine, Nanjing 210023, Jiangsu Province, China.
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Li HZ, Qi L, Zhang XL, Chen XL, Guo L, Guo SQ, Ma J. [Effect of electroacupuncture on GLP-1R/PI3K/Akt protein pathway in mice with Parkinson's disease]. Zhen Ci Yan Jiu 2022; 47:27-32. [PMID: 35128867 DOI: 10.13702/j.1000-0607.20210447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
OBJECTIVE To observe the effect of electroacupuncture(EA) on glucagon-like peptide-1 receptor (GLP-1R)/ phosphatidylinositol 3-kinase (PI3K)/ protein kinase B(Akt) protein pathway in the substantia nigra of mice with Parkinson's di-sease (PD),so as to explore its underlying mechanisms in treatment of PD. METHODS Forty-eight C57BL/6 male mice were randomly divided into normal, model, EA and inhibitor groups, with 12 mice in each group. PD mouse model was established by intragastrical administration of rotenone for 4 weeks. In the EA group, EA was applied at "Fengfu"(GV16), "Taichong"(LR3) and"Zusanli"(ST36) for 30 min, once daily, for 2 weeks. The mice of the inhibitor group received gavage of dipeptidyl peptidase-4 inhibitor ligliptin (10 mg·kg-1·d-1) once a day for 2 weeks. The behavioral scores of mice in each group were observed. The levels of tyrosine hydroxylase (TH) in serum and substantia nigra were detected by ELISA, and the protein relative expression levels of GLP-1R, phosphorylation of PI3K (p-PI3K) and phosphorylation of Akt (p-Akt) in substantia nigra of midbrain of mice were detected by Western blot. RESULTS Compared with the normal group, the behavioral scores were significantly increased (P<0.01), TH levels in serum and substantia nigra, protein expression levels of GLP-1R, p-PI3K and p-Akt of the substantia nigra in the model group were significantly decreased (all P<0.01). After intervention and in comparison with the model group, the behavioral scores were significantly decreased (P<0.01), TH levels and the protein expression levels of GLP-1R, p-PI3K and p-Akt in both EA and inhibitor groups were significantly increased (all P<0.01). There were no significant differences in the abovementioned indexes between EA group and inhibitor group (all P>0.05), except for TH levels which were considerably down-regulated in the EA group relative to the inhibitor group (P<0.01, P<0.05). CONCLUSION EA at GV16, LR3 and ST36 may increase the level of TH in serum and substantia nigra by up-regulating the activity of GLP-1R/PI3K/Akt protein pathway, and improve the behavioral performance of PD induced by rotenone.
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Affiliation(s)
- Han-Zhang Li
- College of Acupuncture and Orthopaedics of Hubei University of Chinese Medicine/Hubei Provincial Collaborative Innovation Center of Preventive Treatment of Diseases by Acupuncture-moxibustion, Wuhan 430061, China
| | - Ling Qi
- College of Acupuncture and Orthopaedics of Hubei University of Chinese Medicine/Hubei Provincial Collaborative Innovation Center of Preventive Treatment of Diseases by Acupuncture-moxibustion, Wuhan 430061, China
| | - Xiao-Lei Zhang
- College of Acupuncture and Orthopaedics of Hubei University of Chinese Medicine/Hubei Provincial Collaborative Innovation Center of Preventive Treatment of Diseases by Acupuncture-moxibustion, Wuhan 430061, China
| | - Xiang-Lin Chen
- College of Acupuncture and Orthopaedics of Hubei University of Chinese Medicine/Hubei Provincial Collaborative Innovation Center of Preventive Treatment of Diseases by Acupuncture-moxibustion, Wuhan 430061, China
| | - Lei Guo
- College of Acupuncture and Orthopaedics of Hubei University of Chinese Medicine/Hubei Provincial Collaborative Innovation Center of Preventive Treatment of Diseases by Acupuncture-moxibustion, Wuhan 430061, China
| | - Shu-Qin Guo
- College of Acupuncture and Orthopaedics of Hubei University of Chinese Medicine/Hubei Provincial Collaborative Innovation Center of Preventive Treatment of Diseases by Acupuncture-moxibustion, Wuhan 430061, China
| | - Jun Ma
- College of Acupuncture and Orthopaedics of Hubei University of Chinese Medicine/Hubei Provincial Collaborative Innovation Center of Preventive Treatment of Diseases by Acupuncture-moxibustion, Wuhan 430061, China
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Tessiri S, Techasen A, Kongpetch S, Namjan A, Loilome W, Chan-on W, Thanan R, Jusakul A. Therapeutic targeting of ARID1A and PI3K/AKT pathway alterations in cholangiocarcinoma. PeerJ 2022; 10:e12750. [PMID: 35070505 PMCID: PMC8761367 DOI: 10.7717/peerj.12750] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 12/15/2021] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Genetic alterations in ARID1A were detected at a high frequency in cholangiocarcinoma (CCA). Growing evidence indicates that the loss of ARID1A expression leads to activation of the PI3K/AKT pathway and increasing sensitivity of ARID1A-deficient cells for treatment with the PI3K/AKT inhibitor. Therefore, we investigated the association between genetic alterations of ARID1A and the PI3K/AKT pathway and evaluated the effect of AKT inhibition on ARID1A-deficient CCA cells. METHODS Alterations of ARID1A, PI3K/AKT pathway-related genes, clinicopathological data and overall survival of 795 CCA patients were retrieved from cBio Cancer Genomics Portal (cBioPortal) databases. The association between genetic alterations and clinical data were analyzed. The effect of the AKT inhibitor (MK-2206) on ARID1A-deficient CCA cell lines and stable ARID1A-knockdown cell lines was investigated. Cell viability, apoptosis, and expression of AKT signaling were analyzed using an MTT assay, flow cytometry, and Western blots, respectively. RESULTS The analysis of a total of 795 CCA samples revealed that ARID1A alterations significantly co-occurred with mutations of EPHA2 (p < 0.001), PIK3CA (p = 0.047), and LAMA1 (p = 0.024). Among the EPHA2 mutant CCA tumors, 82% of EPHA2 mutant tumors co-occurred with ARID1A truncating mutations. CCA tumors with ARID1A and EPHA2 mutations correlated with better survival compared to tumors with ARID1A mutations alone. We detected that 30% of patients with PIK3CA driver missense mutations harbored ARID1A-truncated mutations and 60% of LAMA1-mutated CCA co-occurred with truncating mutations of ARID1A. Interestingly, ARID1A-deficient CCA cell lines and ARID1A-knockdown CCA cells led to increased sensitivity to treatment with MK-2206 compared to the control. Treatment with MK-2206 induced apoptosis in ARID1A-knockdown KKU-213A and HUCCT1 cell lines and decreased the expression of pAKTS473 and mTOR. CONCLUSION These findings suggest a dependency of ARID1A-deficient CCA tumors with the activation of the PI3K/AKT-pathway, and that they may be more vulnerable to selective AKT pathway inhibitors which can be used therapeutically.
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Affiliation(s)
- Supharada Tessiri
- Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand,Biomedical Science Program, Graduate School, Khon Kaen University, Khon Kaen, Thailand
| | - Anchalee Techasen
- Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand,Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Sarinya Kongpetch
- Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand,Department of Pharmacology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Achira Namjan
- Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand,Biomedical Science Program, Graduate School, Khon Kaen University, Khon Kaen, Thailand
| | - Watcharin Loilome
- Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand,Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Waraporn Chan-on
- Center for Research and Innovation, Faculty of Medical Technology, Mahidol University, Bangkok, Thailand
| | - Raynoo Thanan
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Apinya Jusakul
- Centre for Research and Development of Medical Diagnostic Laboratories, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand,Cholangiocarcinoma Research Institute, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
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Sheppard PAS, Puri TA, Galea LAM. Sex Differences and Estradiol Effects in MAPK and Akt Cell Signaling across Subregions of the Hippocampus. Neuroendocrinology 2022; 112:621-635. [PMID: 34407537 DOI: 10.1159/000519072] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 08/16/2021] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Rapid effects of estrogens within the hippocampus of rodents are dependent upon cell-signaling cascades, and activation of these cascades by estrogens varies by sex. Whether these pathways are rapidly activated within the dentate gyrus (DG) and CA1 by estrogens across sex and the anatomical longitudinal axis has been overlooked. METHODS Gonadally intact female and male rats were given either vehicle or physiological systemic low (1.1 µg/kg) or high (37.3 µg/kg) doses of 17β-estradiol 30 min prior to tissue collection. To control for the effects of circulating estrogens, an additional group of female rats was ovariectomized (OVX) and administered 17β-estradiol. Brains were extracted, and tissue punches of the CA1 and DG were taken along the longitudinal hippocampal axis (dorsal and ventral) and analyzed for key mitogen-activated protein kinase (MAPK) and protein kinase B (Akt) cascade phosphoproteins. RESULTS Intact females had higher Akt pathway phosphoproteins (pAkt, pGSK-3β, and pp70S6K) than males in the DG (dorsal and ventral) and lower pERK1/2 in the dorsal DG. Most effects of 17β-estradiol on cell signaling occurred in OVX animals. In OVX animals, 17β-estradiol increased cell signaling of MAPK and Akt phosphoproteins (pERK1/2, pJNK, pAkt, and pGSK-3β) in the CA1 and pERK1/2 and pJNK DG. DISCUSSION/CONCLUSIONS Systemic 17β-estradiol treatment rapidly alters phosphoprotein levels in the hippocampus, dependent on reproductive status, and intact females have greater expression of Akt phosphoproteins than that in intact males in the DG. These findings shed light on underlying mechanisms of sex differences in hippocampal function and response to interventions that affect MAPK or Akt signaling.
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Affiliation(s)
- Paul A S Sheppard
- Department of Psychology, University of British Columbia, Vancouver, British Columbia, Canada
- Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, British Columbia, Canada
| | - Tanvi A Puri
- Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, British Columbia, Canada
- Graduate Program in Neuroscience, University of British Columbia, Vancouver, British Columbia, Canada
| | - Liisa A M Galea
- Department of Psychology, University of British Columbia, Vancouver, British Columbia, Canada
- Djavad Mowafaghian Centre for Brain Health, University of British Columbia, Vancouver, British Columbia, Canada
- Graduate Program in Neuroscience, University of British Columbia, Vancouver, British Columbia, Canada
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Ahmad Z, Somanath PR. AKT Isoforms in the Immune Response in Cancer. Curr Top Microbiol Immunol 2022; 436:349-366. [PMID: 36243852 DOI: 10.1007/978-3-031-06566-8_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
AKT is a protein kinase that exists in three isoforms: AKT1, AKT2, and AKT3. Though similar in structure, these isoforms display different effects. AKT is activated downstream of PI3K, and together, this signaling pathway helps regulate cellular processes including cell growth, proliferation, metabolism, survival, and apoptosis. Disruption in these pathways has been associated with disorders including cardiovascular diseases, developmental disorders, inflammatory responses, autoimmune diseases, neurologic disorders, type 2 diabetes, and several cancers. In cancer, deregulation in the PI3K/AKT pathway can be manifested as tumorigenesis, pathological angiogenesis, and metastasis. Increased activity has been correlated with tumor progression and resistance to cancer treatments. Recent studies have suggested that inhibition of the PI3K/AKT pathway plays a significant role in the development, expansion, and proliferation of cells of the immune system. Additionally, AKT has been found to play an important role in differentiating regulatory T cells, activating B cells, and augmenting tumor immunosurveillance. This emphasizes AKT as a potential target for inhibition in cancer therapy. This chapter reviews AKT structure and regulation, its different isoforms, its role in immune cells, and its modulation in oncotherapy.
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Affiliation(s)
- Zayd Ahmad
- Clinical and Experimental Therapeutics, College of Pharmacy, University of Georgia and Charlie Norwood VA Medical Center, Augusta, GA, 30912, USA
| | - Payaningal R Somanath
- Clinical and Experimental Therapeutics, College of Pharmacy, University of Georgia and Charlie Norwood VA Medical Center, Augusta, GA, 30912, USA.
- Georgia Cancer Center, Vascular Biology Center and Department of Medicine, Augusta University, Augusta, GA, 30912, USA.
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Zhang M, Cheng LH, Yin XT, Luo H, Cai C. Protective effect of adrenomedullin on hyperoxia-induced lung injury. Zhongguo Dang Dai Er Ke Za Zhi 2021; 23:1282-8. [PMID: 34911614 DOI: 10.7499/j.issn.1008-8830.2109005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVES To study the role of adrenomedullin (ADM) in hyperoxia-induced lung injury by examining the effect of ADM on the expression of calcitonin receptor-like receptor (CRLR), receptor activity-modifying protein 2 (RAMP2), extracellular signal-regulated kinase (ERK), and protein kinase B (PKB) in human pulmonary microvascular endothelial cells (HPMECs) under different experimental conditions. METHODS HPMECs were randomly divided into an air group and a hyperoxia group (n=3 each).The HPMECs in the hyperoxia group were cultured in an atmosphere of 92% O2 (3 L/minute) +5% CO2. RT-qPCR and Western blot were used to measure the mRNA and protein expression levels of ADM, CRLR, RAMP2, ERK1/2, and PKB. Other HPMECs were divided into a non-interference group and an interference group (n=3 each), and the mRNA and protein expression levels of ADM, ERK1/2, and PKB were measured after the HPMECs in the interference group were transfected with ADM siRNA. RESULTS Compared with the air group, the hyperoxia group had significant increases in the mRNA and protein expression levels of ADM, CRLR, RAMP2, ERK1/2, and PKB (P<0.05). Compared with the non-interference group, the interference group had significant reductions in the mRNA and protein expression levels of ADM, ERK1/2, and PKB (P<0.05). CONCLUSIONS ERK1/2 and PKB may be the downstream targets of the ADM signaling pathway. ADM mediates the ERK/PKB signaling pathway by regulating CRLR/RAMP2 and participates in the protection of hyperoxia-induced lung injury.
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Oktelik FB, Yilmaz V, Turkoglu R, Akbayir E, Tuzun E, Deniz G, Cinar S. Expression of Akt1 and p-Akt1 in peripheral T cell subsets of multiple sclerosis patients. Acta Neurol Belg 2021; 121:1777-1782. [PMID: 33034831 DOI: 10.1007/s13760-020-01518-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Accepted: 09/28/2020] [Indexed: 12/12/2022]
Abstract
Multiple sclerosis is an autoimmune disorder induced by the infiltration of autoreactive immune cells into the central nervous system. Akt/PKB signaling pathway is crucially involved in T cell development and survival. We aimed to determine whether Akt1 expression levels of regulatory T (Treg) cells are altered in MS and are associated with disease activity. Relapsing-remitting multiple sclerosis (RR-MS, n = 17) patients and healthy individuals (n = 20) were enrolled. Peripheral blood mononuclear cells were isolated and anti-CD3, -CD4, -CD8, -CD25, -CD127 monoclonal antibodies were used to identify the T cell subsets. After stimulation with phorbol myristate acetate/ionomycin, the Akt1 and phosphorylated-Akt1 (p-Akt1) levels of T cell subsets were detected with intracellular staining using flow cytometry. Total Akt1 and p-Akt1 expression levels were found to be suppressed in CD4+ T cell and Treg populations of RR-MS patients. Progression indices were positively correlated with Akt1 expression levels of Tregs indicating that the Akt pathway might partake in the progression of multiple sclerosis. Flow cytometry may effectively be used for the evaluation of the Akt pathway activity. Our findings suggest that the magnitude of suppression of the Akt pathway might serve as a biomarker for the prognosis of multiple sclerosis.
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Affiliation(s)
- Fatma Betul Oktelik
- Department of Immunology, Istanbul University, Aziz Sancar Institute of Experimental Medicine, Vakif Gureba C. Fatih, Istanbul, Turkey
| | - Vuslat Yilmaz
- Department of Neuro Science, Istanbul University, Aziz Sancar Institute of Experimental Medicine, Istanbul, Turkey
| | - Recai Turkoglu
- Department of Neurology, Istanbul Haydarpasa Numune Training and Research Hospital, Istanbul, Turkey
| | - Ece Akbayir
- Department of Neuro Science, Istanbul University, Aziz Sancar Institute of Experimental Medicine, Istanbul, Turkey
| | - Erdem Tuzun
- Department of Neuro Science, Istanbul University, Aziz Sancar Institute of Experimental Medicine, Istanbul, Turkey
| | - Gunnur Deniz
- Department of Immunology, Istanbul University, Aziz Sancar Institute of Experimental Medicine, Vakif Gureba C. Fatih, Istanbul, Turkey
| | - Suzan Cinar
- Department of Immunology, Istanbul University, Aziz Sancar Institute of Experimental Medicine, Vakif Gureba C. Fatih, Istanbul, Turkey.
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Wang W, Li QL, Ma Q, Xia R, Gao B, Wang Y, Wang J. [Effect of moxibustion combined with benazepril on expression of IL-18 and phosphorylated protein kinase B in myocardial tissue of rats with chronic heart failure]. Zhen Ci Yan Jiu 2021; 46:935-41. [PMID: 34865330 DOI: 10.13702/j.1000-0607.201219] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To observe the effect of moxibustion combined with benazepril on cardiac function and expression levels of myocardial interleukin-18(IL-18), phosphorylated protein kinase B(p-Akt) in rats with chronic heart failure (CHF), so as to explore its underlying mechanisms in improvement of CHF. METHODS Fifty male rats were randomly divided into normal, model, moxibustion, benazepril and moxibustion+benazepril groups (n=10 rats per group). The CHF model was established by intraperitoneal injection of doxorubicin hydrochloride solution (DOX, 2.5 mg/kg) twice a week for 4 weeks. After successful modeling, the rats in the normal and model groups were fed with normal diet, and fixed on a rat plate for 20 min each time without any treatment. Mild moxibustion was applied to bilateral "Feishu" (BL13) and "Xinshu" (BL15) for 20 min each time, for 3 weeks in the moxibustion and moxibustion+benazepril groups. Rats of the benazepril and moxibustion+benazepril groups received gavage of benazepril (2 mg/kg) once daily for 3 weeks. The general behaviors of rats were observed. The ejection fraction (EF), left ventricular diameter shortening (FS), left ventricular end-diastolic diameter (LVIDd), left ventricular end-systolic diameter (LVIDs), heart rate (HR) and ventricular septal thickness (IVS) were examined by echocardiography. The content of serum N-terminal pro-brain natriuretic peptide (NT-proBNP) was detected by enzyme-linked immunosorbent assay, and expression levels of myocardial IL-18, p-Akt were detected by Western blot. RESULTS Compared with the normal group, the EF, FS, IVS, and myocardial p-Akt expression level were significantly reduced (P<0.01), and the LVIDd, LVIDs, HR, and serum NT-proBNP content and myocardial IL-18 expression level were significantly increased in the model group (P<0.01). In comparison with the model group, the EF, FS, IVS, and myocardial p-Akt were remarkably up-regulated (P<0.05, P<0.01), and the LVIDd, LVIDs, HR, serum NT-proBNP content, and myocardial IL-18 expression level were significantly down-regulated (P<0.05, P<0.01) in the moxibustion, benazepril, and moxibustion+benazepril groups. Compared with the moxibustion+benazepr group, the levels of LVIDs, HR, serum NT-proBNP and myocardial IL-18 expression were obviously higher (P<0.05, P<0.01), while the levels of EF, FS, IVS and p-Akt were significantly lower in the moxibustion and benazepril groups (P<0.01). CONCLUSION Moxibustion combined with benazepril improves cardiac function in CHF rats, and is superior to simple moxibustion and simple benazepril in reducing IL-18 expression and increasing p-Akt expression in myocardial tissue.
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Affiliation(s)
- Wei Wang
- Clinical College of Chinese Medicine, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Qing-Ling Li
- Clinical College of Chinese Medicine, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Qiang Ma
- Clinical College of Chinese Medicine, Anhui University of Chinese Medicine, Hefei 230012, China; Graduate School, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Ran Xia
- Clinical College of Chinese Medicine, Anhui University of Chinese Medicine, Hefei 230012, China; Graduate School, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Bing Gao
- College of Acupuncture and Massage, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Yi Wang
- College of Acupuncture and Massage, Anhui University of Chinese Medicine, Hefei 230012, China
| | - Jing Wang
- Clinical College of Chinese Medicine, Anhui University of Chinese Medicine, Hefei 230012, China
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21
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Yeoh Y, Low TY, Abu N, Lee PY. Regulation of signal transduction pathways in colorectal cancer: implications for therapeutic resistance. PeerJ 2021; 9:e12338. [PMID: 34733591 PMCID: PMC8544255 DOI: 10.7717/peerj.12338] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 09/28/2021] [Indexed: 12/13/2022] Open
Abstract
Resistance to anti-cancer treatments is a critical and widespread health issue that has brought serious impacts on lives, the economy and public policies. Mounting research has suggested that a selected spectrum of patients with advanced colorectal cancer (CRC) tend to respond poorly to both chemotherapeutic and targeted therapeutic regimens. Drug resistance in tumours can occur in an intrinsic or acquired manner, rendering cancer cells insensitive to the treatment of anti-cancer therapies. Multiple factors have been associated with drug resistance. The most well-established factors are the emergence of cancer stem cell-like properties and overexpression of ABC transporters that mediate drug efflux. Besides, there is emerging evidence that signalling pathways that modulate cell survival and drug metabolism play major roles in the maintenance of multidrug resistance in CRC. This article reviews drug resistance in CRC as a result of alterations in the MAPK, PI3K/PKB, Wnt/β-catenin and Notch pathways.
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Affiliation(s)
- Yeelon Yeoh
- UKM Medical Molecular Biology Institute (UMBI), Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Teck Yew Low
- UKM Medical Molecular Biology Institute (UMBI), Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Nadiah Abu
- UKM Medical Molecular Biology Institute (UMBI), Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Pey Yee Lee
- UKM Medical Molecular Biology Institute (UMBI), Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
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22
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Zhang Y, Shang Z, Liu A. Angiotensin-(3-7) alleviates isoprenaline-induced cardiac remodeling via attenuating cAMP-PKA and PI3K/Akt signaling pathways. Amino Acids 2021; 53:1533-1543. [PMID: 34494132 DOI: 10.1007/s00726-021-03074-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 08/26/2021] [Indexed: 02/06/2023]
Abstract
The renin-angiotensin system is involved in the regulation of various heart diseases. The present study aimed to determine the effects of angiotensin (Ang)-(3-7) on cardiac remodeling and its downstream signaling pathways in neonatal rat cardiomyocytes (NRCMs) and neonatal rat cardiac fibroblasts (NRCFs). The administration of Ang-(3-7) alleviated isoprenaline (ISO)-induced cardiac hypertrophy and fibrosis of mice. ISO treatment increased the levels of atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP) and beta-myosin heavy chain (β-MHC) in NRCMs, and reduced the levels of collagen I, collagen III, fibronectin, and alpha-smooth muscle actin (α-SMA) in NRCFs. These changes were inhibited by Ang-(3-7) administration. The levels of protein kinase A (PKA), phosphorylated phosphatidylinositol-3-kinase (p-PI3K), and phosphorylated protein kinase B (p-Akt) were increased in NRCMs and NRCFs treated with ISO. The increase of PKA, but not p-PI3K or p-Akt was attenuated by Ang-(3-7) treatment in NRCMs. The increases of p-PI3K and p-Akt, but not PKA were reversed by Ang-(3-7) treatment in NRCFs. Treatment with cAMP or PKA overexpression reversed the attenuating effects of Ang-(3-7) on ISO-induced hypertrophy of NRCMs. The administration of PI3K inhibitor or Akt inhibitor alleviated ISO-induced fibrosis of NRCFs. These results indicated that Ang-(3-7) could alleviate cardiac remodeling. The administration of Ang-(3-7) attenuated hypertrophy of NRCMs via inhibiting the cAMP/PKA signaling pathway, and alleviated fibrosis of NRCFs via inhibiting PI3K/Akt signaling pathway.
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Affiliation(s)
- Yonglin Zhang
- Department of Cardiology, Binhai County People's Hospital, 188 Fudong Middle Road, Yancheng, 224500, Jiangsu, China
| | - Zhenglu Shang
- Department of Cardiology, Wuxi Huishan District People's Hospital, Wuxi, China
| | - Aijun Liu
- Department of Cardiology, Binhai County People's Hospital, 188 Fudong Middle Road, Yancheng, 224500, Jiangsu, China.
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Ying KE, Feng W, Ying WZ, Sanders PW. Cellular antioxidant mechanisms control immunoglobulin light chain-mediated proximal tubule injury. Free Radic Biol Med 2021; 171:80-90. [PMID: 33989758 PMCID: PMC8217262 DOI: 10.1016/j.freeradbiomed.2021.05.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 04/27/2021] [Accepted: 05/06/2021] [Indexed: 12/27/2022]
Abstract
A major cause of morbidity and mortality in multiple myeloma is kidney injury from overproduction of monoclonal immunoglobulin light chains (FLC). FLC can induce damage through the production of hydrogen peroxide, which activates pro-inflammatory and pro-apoptotic pathways. The present study focused on catalase, a highly conserved antioxidant enzyme that degrades hydrogen peroxide. Initial findings were that FLC increased hydrogen peroxide levels but also decreased catalase levels and activity in proximal tubule epithelium. In order to clarify, we showed that the phosphatidylinositol 3-kinase inhibitor, LY294002, inhibited FLC-induced Akt-mediated deactivation of Forkhead box O class 3a (FoxO3a) and increased catalase activity in proximal tubule cells. Augmented catalase activity decreased FLC-mediated production of hydrogen peroxide as well as the associated increase in High Mobility Group Box 1 (HMGB1) protein release and caspase-3 activity. Coincubation of cells with FLC and an allosteric activator of Sirtuin 1 (SIRT1) was also sufficient to increase catalase activity and promote similar cytoprotective effects. Our studies confirmed that the mechanism of downregulation of catalase by FLC involved deactivation of FoxO3a and inhibition of SIRT1. Mechanistic understanding of catalase regulation allows for future treatments that target pathways that increase catalase in the setting of proximal tubule injury from FLC.
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Affiliation(s)
- Kai Er Ying
- Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, 35294-0007, USA
| | - Wenguang Feng
- Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, 35294-0007, USA
| | - Wei-Zhong Ying
- Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, 35294-0007, USA
| | - Paul W Sanders
- Division of Nephrology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, 35294-0007, USA; Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL, 35294-0007, USA; Department of Veterans Affairs Medical Center, Birmingham, AL, 35233, USA.
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Yang J, Feng G, Chen M, Wang S, Tang F, Zhou J, Bao N, Yu J, Jiang G. Glucosamine promotes seizure activity via activation of the PI3K/Akt pathway in epileptic rats. Epilepsy Res 2021; 175:106679. [PMID: 34166966 DOI: 10.1016/j.eplepsyres.2021.106679] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 04/28/2021] [Accepted: 05/27/2021] [Indexed: 11/25/2022]
Abstract
CONTEXT Glucosamine is an amino monosaccharide with a small molecular weight and has a protective effect against various neurological diseases including multiple sclerosis and encephalomyelitis. Interestingly, low-dose glucosamine has exhibited anti-epilepsy activity. Recent studies have shown that the activation of the protein kinase B (Akt) signaling pathway may promote epilepsy. Glucosamine can increase the level of Akt phosphorylation in the brain tissue, which may aggravate epilepsy. Hence, we speculate that a higher dose of glucosamine may aggravate epilepsy via AKT signaling. OBJECTIVE To investigate the effect of glucosamine on the behavior and electrophysiology of epileptic rats through PI3K/Akt pathway. METHODS Glucose (2.0 g/kg) and glucosamine (0, 0.5, 1.0, and 2.0 g/kg) were added to 2 mL of drinking water, respectively. An acute seizure rat model of lithium-pilocarpine and PTZ-kindling were constructed to observe the effects of different doses of glucosamine on epileptic behavior and hippocampal electrical activity. Meanwhile, the changes in Akt were detected by western blot. RESULTS Epileptic seizures were induced by a single dose of pilocarpine or PTZ and 2.0 g/kg of glucosamine significantly prolonged the duration and severity of epileptic seizures, enhanced hippocampal electrical activity energy density, and increased phosphorylated AKT levels. A glucosamine dose of 2.0 g/kg also significantly increased the total onset energy density. Furthermore, 2.0 g/kg glucosamine facilitated the development of the chronic PTZ-kindling process. CONCLUSIONS Glucosamine may exacerbate acute and chronic epileptic seizures via activation of the PI3K/Akt pathway in rats with experimental epilepsy.
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Affiliation(s)
- Jin Yang
- Department of Neurology, Affiliated Hospital of North Sichuan Medical College, 63 Wenhua Road, Nanchong, 637000, China; Institute of Neurological Diseases, North Sichuan Medical College, 234 Fujiang Road, Nanchong, Sichuan, China
| | - Guibo Feng
- Department of General Medicine, Yongchuan Hospital of Chongqing Medical University, Chongqing, 402160, China
| | - Mingyue Chen
- Department of Neurology, Affiliated Hospital of North Sichuan Medical College, 63 Wenhua Road, Nanchong, 637000, China; Institute of Neurological Diseases, North Sichuan Medical College, 234 Fujiang Road, Nanchong, Sichuan, China
| | - Shenglin Wang
- Department of Neurology, Affiliated Hospital of North Sichuan Medical College, 63 Wenhua Road, Nanchong, 637000, China; Institute of Neurological Diseases, North Sichuan Medical College, 234 Fujiang Road, Nanchong, Sichuan, China
| | - Feng Tang
- Department of Neurology, Affiliated Hospital of North Sichuan Medical College, 63 Wenhua Road, Nanchong, 637000, China; Institute of Neurological Diseases, North Sichuan Medical College, 234 Fujiang Road, Nanchong, Sichuan, China
| | - Jing Zhou
- Department of Neurology, Affiliated Hospital of North Sichuan Medical College, 63 Wenhua Road, Nanchong, 637000, China; Institute of Neurological Diseases, North Sichuan Medical College, 234 Fujiang Road, Nanchong, Sichuan, China
| | - Nana Bao
- Department of Neurology, Affiliated Hospital of North Sichuan Medical College, 63 Wenhua Road, Nanchong, 637000, China; Institute of Neurological Diseases, North Sichuan Medical College, 234 Fujiang Road, Nanchong, Sichuan, China
| | - Juming Yu
- Department of Neurology, Affiliated Hospital of North Sichuan Medical College, 63 Wenhua Road, Nanchong, 637000, China; Institute of Neurological Diseases, North Sichuan Medical College, 234 Fujiang Road, Nanchong, Sichuan, China
| | - Guohui Jiang
- Department of Neurology, Affiliated Hospital of North Sichuan Medical College, 63 Wenhua Road, Nanchong, 637000, China; Institute of Neurological Diseases, North Sichuan Medical College, 234 Fujiang Road, Nanchong, Sichuan, China.
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Ren S, Pan L, Yang L, Niu Z, Wang L, Feng H, Yuan M. miR-29a-3p transferred by mesenchymal stem cells-derived extracellular vesicles protects against myocardial injury after severe acute pancreatitis. Life Sci 2021; 272:119189. [PMID: 33571516 DOI: 10.1016/j.lfs.2021.119189] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 01/28/2021] [Accepted: 02/06/2021] [Indexed: 02/05/2023]
Abstract
AIMS Acute pancreatitis (AP) is an inflammatory disease of the pancreas that may affect local tissues or remote organ systems, while severe acute pancreatitis (SAP) is a life-threatening disorder associated with multiple organ failure. In this investigation, we set about to determine whether microRNA-29a-3p (miR-29a-3p) carried by mesenchymal stem cell (MSCs)-derived extracellular vesicles (EVs) affects the myocardial injury during SAP. MAIN METHODS EVs were isolated from MSCs of rat bone marrow by differential centrifugation. An SAP rat model was developed and treated with MSCs-EVs and/or alteration of miR-29a-3p and HMGB1 expression, followed by assessment of the rats' cardiac function and inflammation. Next, cardiomyocytes H9C2 were co-cultured with MSC-EVs and internalization of EVs was evaluated, followed by evaluation of whether EVs could transmit miR-29a-3p cargos into H9C2 cells and affect their biological functions. KEY FINDINGS EVs derived from MSCs were observed to protect against SAP-induced myocardial injury. In SAP-induced rats, miR-29a-3p was under-expressed in myocardial tissues. In addition, we also confirmed that miR-29a-3p could be transferred into the H9C2 cardiomyocytes by MSC-derived EVs, which downregulated the expression of inflammatory markers and improve cardiac function to attenuate myocardial injury. Furthermore, miR-29a-3p inhibited the expression of HMGB1 to downregulate TLR4 expression and further inactivate the Akt signaling pathway. SIGNIFICANCE These findings support the cardioprotective action of miR-29a-3p transmitted by MSCs-derived EVs in SAP-induced myocardial injury via downregulation of the HMGB1/TLR4/Akt axis, highlighting a promising target for the EV-based therapy for SAP.
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Affiliation(s)
- Song Ren
- Department of Geriatric Digestive Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, PR China
| | - Longfei Pan
- Department of Emergency Medicine, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, PR China.
| | - Linqing Yang
- Department of Nursing, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, PR China
| | - Zequn Niu
- Department of Emergency Medicine, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, PR China
| | - Liming Wang
- Department of Emergency Medicine, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, PR China
| | - Hui Feng
- Department of Emergency Medicine, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, PR China
| | - Miao Yuan
- Department of Emergency Medicine, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, PR China
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Issaadi HM, Béni Z, Tóth T, Dékány M, Hsieh TJ, Balogh GT, Hunyadi A. Diversity-oriented synthesis through gamma radiolysis: Preparation of unusual ecdysteroid derivatives activating Akt and AMPK in skeletal muscle cells. Bioorg Chem 2021; 112:104951. [PMID: 34000705 DOI: 10.1016/j.bioorg.2021.104951] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 04/22/2021] [Accepted: 04/26/2021] [Indexed: 11/19/2022]
Abstract
Gamma-ray radiation is a unique way to induce chemical transformations of bioactive compounds. In the present study, we pursued this approach to the diversity-oriented synthesis of analogs of 20-hydroxyecdysone (20E), an abundant ecdysteroid with a range of beneficial, non-hormonal bioactivities in mammals including humans. Gamma irradiations of aqueous solutions of 20E were conducted either in N2- or N2O-saturated solutions. Centrifugal partition chromatography was used to fractionate crude resulting irradiated materials using a biphasic solvent system composed of tert-butyl alcohol - ethyl acetate - water (0.45:0.9:1, v/v/v) in ascending mode. Subsequently, the products were purified by RP-HPLC. Fourteen ecdysteroids, including five new compounds, were isolated, and their structure were elucidated by 1D and 2D NMR and HRMS. Compounds 2-4, 7, 9, 12 and 15 were tested for their capacity to increase the Akt- and AMPK-phosphorylation of C2C12 murine skeletal myotubes in vitro. The compounds were similarly active on Akt as their parent compound. Stachysterone B (7) and a new ring-rearranged compound (12) were more potent than 20E in activating AMPK, indicating a stronger cytoprotective effect. Our results demonstrate the use of gamma irradiation in expanding the chemical diversity of ecdysteroids to obtain new, unusual bioactive metabolites.
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Affiliation(s)
- Halima Meriem Issaadi
- Institute of Pharmacognosy, University of Szeged, Eötvös str. 6, 6726 Szeged, Hungary
| | - Zoltán Béni
- Spectroscopic Research, Gedeon Richter Plc., Gyömrői út 19-21, H-1103 Budapest, Hungary
| | - Tünde Tóth
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, PO Box 91, H-1521 Budapest, Hungary; Institute for Energy Security and Environmental Safety, Centre for Energy Research, P.O. Box 49, H-1525 Budapest, Hungary
| | - Miklós Dékány
- Spectroscopic Research, Gedeon Richter Plc., Gyömrői út 19-21, H-1103 Budapest, Hungary
| | - Tusty-Jiuan Hsieh
- Graduate Institute of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan, ROC
| | - György Tibor Balogh
- Department of Chemical and Environmental Process Engineering, Budapest University of Technology and Economics, Budafoki út 8., H-1111 Budapest, Hungary; Faculty of Pharmacy, Department of Pharmacodynamics and Biopharmacy, University of Szeged, Eötvös utca 6., H-6720 Szeged, Hungary.
| | - Attila Hunyadi
- Institute of Pharmacognosy, University of Szeged, Eötvös str. 6, 6726 Szeged, Hungary; Interdisciplinary Centre for Natural Products, University of Szeged, Eötvös str. 6, 6720 Szeged, Hungary.
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Aslan A, Beyaz S, Gok O, Can MI, Erman F, Erman O. The impact of ellagic acid on some apoptotic gene expressions: a new perspective for the regulation of pancreatic Nrf-2/NF-κB and Akt/VEGF signaling in CCl 4-induced pancreas damage in rats. Immunopharmacol Immunotoxicol 2021; 43:145-152. [PMID: 33455449 DOI: 10.1080/08923973.2020.1869255] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVE The aim of this study was to evaluate the potential effect of ellagic acid (EA) in the treatment of pancreatic injury. EA has been found to have strong anti-inflammatory, antioxidative, and anticancer properties. The effects of EA on pancreati˜c star cell (PSC) activation and cell functions have been evaluated and it has been shown that it inhibits the activation of basic cell functions and PSCs and. it has antidiabetic activity through its effect on β-pancreas cells. MATERIALS AND METHODS In this work, 36 Wistar albino rats (n = 36, 8 weeks old) were used. Rats were divided to 4 groups and 9 rats were each group. Groups: Group 1: control group; Group 2: EA group; Group 3: carbon tetrachloride (CCl4) group; Group 4: EA + CCl4 group. Animals were decapitated after 8 weeks and their pancreas tissue samples were taken and researched. In pancreas tissue, NF-κB, TNF-α, Nrf-2, VEGF, Bcl-2, caspase-3, and Akt proteins expression ratios were analyzed by western blotting method, CAT activity and GSH levels were determined by spectrophotometer and ROS production was detected by MDA. RESULTS In our results, the Nrf-2 and caspase-3 protein expressions, catalase activities and GSH levels increased, TNF-α, NF-κB, Bcl-2, VEGF, and Akt protein expressions and MDA levels reduced in EA + CCl4 group comparable to the CCl4 group. CONCLUSIONS These findings reveal that EA decreases pancreas tissue injury in rats and that EA may also be used as a drug against pancreas tissue injury in the future.
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Affiliation(s)
- Abdullah Aslan
- Department of Biology-Molecular Biology and Genetics Program, Faculty of Science, Firat University, Elazig, Turkey
| | - Seda Beyaz
- Department of Biology, Faculty of Science, Firat University, Elazig, Turkey
| | - Ozlem Gok
- Department of Biology, Faculty of Science, Firat University, Elazig, Turkey
| | - Muhammed Ismail Can
- Department of Biology, Faculty of Science, Inonu University, Malatya, Turkey
| | - Fazilet Erman
- Faculty of Health Sciences, Firat University, Elazig, Turkey
| | - Orhan Erman
- Department of Biology, Faculty of Science, Firat University, Elazig, Turkey
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Piao MJ, Kim KC, Kang KA, Fernando PDSM, Herath HMUL, Hyun JW. Phloroglucinol Attenuates Ultraviolet B-Induced 8-Oxoguanine Formation in Human HaCaT Keratinocytes through Akt and Erk-Mediated Nrf2/Ogg1 Signaling Pathways. Biomol Ther (Seoul) 2021; 29:90-97. [PMID: 32587122 PMCID: PMC7771840 DOI: 10.4062/biomolther.2020.059] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Revised: 05/15/2020] [Accepted: 05/19/2020] [Indexed: 12/19/2022] Open
Abstract
Ultraviolet B (UVB) radiation causes DNA base modifications. One of these changes leads to the generation of 8-oxoguanine (8-oxoG) due to oxidative stress. In human skin, this modification may induce sunburn, inflammation, and aging and may ultimately result in cancer. We investigated whether phloroglucinol (1,3,5-trihydroxybenzene), by enhancing the expression and activity of 8-oxoG DNA glycosylase 1 (Ogg1), had an effect on the capacity of UVB-exposed human HaCaT keratinocytes to repair oxidative DNA damage. Here, the effects of phloroglucinol were investigated using a luciferase activity assay, reverse transcription-polymerase chain reactions, western blot analysis, and a chromatin immunoprecipitation assay. Phloroglucinol restored Ogg1 activity and decreased the formation of 8-oxoG in UVB-exposed cells. Moreover, phloroglucinol increased Ogg1 transcription and protein expression, counteracting the UVB-induced reduction in Ogg1 levels. Phloroglucinol also enhanced the nuclear translocation of nuclear factor erythroid 2-related factor 2 (Nrf2) as well as Nrf2 binding to an antioxidant response element located in the Ogg1 gene promoter. UVB exposure inhibited the phosphorylation of protein kinase B (PKB or Akt) and extracellular signal-regulated kinase (Erk), two major enzymes involved in cell protection against oxidative stress, regulating the activity of Nrf2. Akt and Erk phosphorylation was restored by phloroglucinol in the UVB-exposed keratinocytes. These results indicated that phloroglucinol attenuated UVB-induced 8-oxoG formation in keratinocytes via an Akt/Erk-dependent, Nrf2/Ogg1-mediated signaling pathway.
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Affiliation(s)
- Mei Jing Piao
- Department of Biochemistry, College of Medicine, Jeju National University and Jeju Research Center for Natural Medicine, Jeju 63243, Republic of Korea
| | - Ki Cheon Kim
- National Center for Efficacy Evaluation of Respiratory Disease Product, Korea Institute of Toxicology, Jeongeup 56212, Republic of Korea
| | - Kyoung Ah Kang
- Department of Biochemistry, College of Medicine, Jeju National University and Jeju Research Center for Natural Medicine, Jeju 63243, Republic of Korea
| | | | | | - Jin Won Hyun
- Department of Biochemistry, College of Medicine, Jeju National University and Jeju Research Center for Natural Medicine, Jeju 63243, Republic of Korea
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Chen J, Qiu S, Kim JT, Cho JS, Moon JH, Zhou Y, Auh JH, Lee HJ. Garcinone C suppresses colon tumorigenesis through the Gli1-dependent hedgehog signaling pathway. Phytomedicine 2020; 79:153334. [PMID: 32920288 DOI: 10.1016/j.phymed.2020.153334] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 07/31/2020] [Accepted: 09/02/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Although garcinone C, a natural xanthone derivative identified in the pericarp of Garcinia mangostana, has been demonstrated to exert different health beneficial activities in oxidative stress and β-amyloid aggregation, the role of garcinone C in colon tumorigenesis has not been investigated. In addition, aberrant Hedgehog (Hh) signaling activation is associated with tumorigenesis including colon cancer. Here, we hypothesized that garcinone C can prevent colon tumorigenesis through regulating the Hh signaling pathway. METHOD Colony formation assay and flow cytometry were used to evaluate the effect of garcinone C on the proliferation and cell cycle progression of colon cancer cells. Protein expression of cell cycle related markers and Hh/Gli1 signaling mediators were determined. The regulatory effect of orally administered garcinone C on the Hh/Gli1 signaling pathway and colon tumorigenesis was evaluated in an azoxymethane (AOM)/dextran sulfate sodium (DSS)-induced colon cancer animal model. RESULTS Garcinone C suppressed the proliferation of colon cancer cells, induced G0/G1 cell cycle arrest, as well as regulated the expression of cell cycle-related markers such as cyclin D1, cyclin E, CDK6, and p21. Garcinone C inhibited the expression of Gli1, a key mediator of Hedgehog signaling, and protein kinase B (AKT) phosphorylation in Smo-independent colon cancer cells. In the AOM/DSS-induced colon tumorigenesis model, garcinone C significantly inhibited tumor development, regulated the expression of cell cycle markers and Gli1, and reduced AKT phosphorylation in colon tumor tissues, which is consistent with our in vitro results. CONCLUSION Garcinone C can suppress colon tumorigenesis in vitro and in vivo through Gli1-dependent non-canonical Hedgehog signaling, suggesting that it may serve as a potent chemopreventive agent against colon tumorigenesis.
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Affiliation(s)
- Jing Chen
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546, South Korea
| | - Shuai Qiu
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546, South Korea
| | - Jin Tae Kim
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546, South Korea
| | - Jae Seok Cho
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546, South Korea
| | - Ji Hyun Moon
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546, South Korea
| | - Yimeng Zhou
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546, South Korea
| | - Joong-Hyuck Auh
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546, South Korea.
| | - Hong Jin Lee
- Department of Food Science and Biotechnology, Chung-Ang University, Anseong, 17546, South Korea.
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Gao YH, Yu L, Liu ZS, Li YF. Aristocratic human papillomavirus drove cervical cancer: a study of the therapeutic potential of the combination of interferon with zinc. Mol Cell Biochem 2021; 476:757-65. [PMID: 33099745 DOI: 10.1007/s11010-020-03941-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 10/09/2020] [Indexed: 10/23/2022]
Abstract
Human papillomavirus (HPV) infection is related to cancer growth of vaginal, cervical, vulva, penile, anogenital, and non-genital oropharyngeal sites. HPV, as a sexually transmitted virus, infects all sexes similarly but with more significant pathological risks in women. This accounts for high mortality due to late detection and poor prognosis. The initial development and eventual progress of this cancer type depend entirely on three main oncogenes E5, E6 and E7, constitutively expressed to lead to carcinogenesis. Despite an opportunity for pharmacological therapy, there is still a shortage of medical treatment that may remove HPV from infected lesions. This study offers a concise summary of the nature of the issue and the current status of work on potential lead molecules and therapeutic approaches that show the capacity of HPV therapies to counteract the roles of deregulation of E5, E6, and E7.
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Yan S, Hui Y, Li J, Xu X, Li Q, Wei H. Glutamine relieves oxidative stress through PI3K/Akt signaling pathway in DSS-induced ulcerative colitis mice. Iran J Basic Med Sci 2020; 23:1124-1129. [PMID: 32963733 PMCID: PMC7491493 DOI: 10.22038/ijbms.2020.39815.9436] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Objective(s): Ulcerative colitis (UC) is a kind of complex immune disease, and a major cause of destruction of intestinal barrier and oxidative stress in this field. In this paper, glutamine (Gln) was believed to offer protection against oxidative stress injury in colitis mice. Materials and Methods: Thirty mice were randomly assigned into control, model, LY294002 (PI3K/Akt inhibitor), Gln, Gln+LY294002 and 5-Aminosalicylic acid (5-ASA) groups. The mice in the experimental group drank 4% dextran sulfate sodium salt (DSS) for 7 consecutive days. The protective effect of Gln on oxidative stress was quantified by keeping colitis mice, involving Phosphatidylinositol-3-kinase (PI3K)/Protein kinase B (Akt)/mammalian target of Rapamycin (mTOR) signaling pathway, with different medications or distilled water through intragastric administration for 10 consecutive days. Results: In vivo administration of Gln, LY294002 or 5-ASA was found to ameliorate the symptoms of colitis in mice, such as reduced growth, loose stools and stool bleeding; protected DSS-induced colitis mice from goblet cell loss, lymphocytosis, mucosal erosion, loss of crypts, and neutrophil infiltration; improved the activity of superoxide dismutase (SOD) and glutathione peroxidase (GSH-XP); decreased the content of malondialdehyde (MDA); and inhibited the activation of PI3K/Akt signaling pathway. Conclusion: Administration of Gln to the DSS-induced colitis mice led to a clearly reduction in oxidative stress-induced injury. The Gln is confirmed as inhibiting the PI3K/Akt signaling pathway activity.
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Affiliation(s)
- Shuguang Yan
- College of Basic Medicine, the Shaanxi University of Chinese Medicine, Xianyang, Shaanxi 712046, P.R. China
| | - Yi Hui
- College of Basic Medicine, the Shaanxi University of Chinese Medicine, Xianyang, Shaanxi 712046, P.R. China
| | - Jingtao Li
- Department of Liver Diseases, the Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, Shaanxi 712020, P.R. China
| | - Xiaofan Xu
- Medical Experiment Center, the Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, 712046, P.R. China
| | - Qian Li
- Medical Experiment Center, the Shaanxi University of Chinese Medicine, Xianyang, Shaanxi, 712046, P.R. China
| | - Hailiang Wei
- Departments of General Surgery, the Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang 712020, Shaanxi, P.R. China
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Sawicka AK, Renzi G, Olek RA. The bright and the dark sides of L-carnitine supplementation: a systematic review. J Int Soc Sports Nutr 2020; 17:49. [PMID: 32958033 PMCID: PMC7507632 DOI: 10.1186/s12970-020-00377-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 09/04/2020] [Indexed: 12/16/2022] Open
Abstract
Background L-carnitine (LC) is used as a supplement by recreationally-active, competitive and highly trained athletes. This systematic review aims to evaluate the effect of prolonged LC supplementation on metabolism and metabolic modifications. Methods A literature search was conducted in the MEDLINE (via PubMed) and Web of Science databases from the inception up February 2020. Eligibility criteria included studies on healthy human subjects, treated for at least 12 weeks with LC administered orally, with no drugs or any other multi-ingredient supplements co-ingestion. Results The initial search retrieved 1024 articles, and a total of 11 studies were finally included after applying inclusion and exclusion criteria. All the selected studies were conducted with healthy human subjects, with supplemented dose ranging from 1 g to 4 g per day for either 12 or 24 weeks. LC supplementation, in combination with carbohydrates (CHO) effectively elevated total carnitine content in skeletal muscle. Twenty-four-weeks of LC supplementation did not affect muscle strength in healthy aged women, but significantly increased muscle mass, improved physical effort tolerance and cognitive function in centenarians. LC supplementation was also noted to induce an increase of fasting plasma trimethylamine-N-oxide (TMAO) levels, which was not associated with modification of determined inflammatory nor oxidative stress markers. Conclusion Prolonged LC supplementation in specific conditions may affect physical performance. On the other hand, LC supplementation elevates fasting plasma TMAO, compound supposed to be pro-atherogenic. Therefore, additional studies focusing on long-term supplementation and its longitudinal effect on the cardiovascular system are needed.
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Affiliation(s)
- Angelika K Sawicka
- Department of Human Physiology, Faculty of Health Sciences, Medical University of Gdansk, 80-210, Gdansk, Poland
| | | | - Robert A Olek
- Department of Athletics, Strength and Conditioning, Poznan University of Physical Education, Krolowej Jadwigi 27/39, 61-871, Poznan, Poland.
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Cheng L, Tu C, Min Y, He D, Wan S, Xiong F. MiR-194 targets Runx1/Akt pathway to reduce renal fibrosis in mice with unilateral ureteral obstruction. Int Urol Nephrol 2020; 52:1801-1808. [PMID: 32661617 DOI: 10.1007/s11255-020-02544-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 06/15/2020] [Indexed: 12/25/2022]
Abstract
PURPOSE Chronic kidney disease (CKD) has become a global public health problem and accompanied by renal fibrosis. MiR-194, a tumor suppressor gene, has been previously reported to be associated with the pathogenesis of tissue fibrosis. However, the role of miR-194 in the pathogenesis of renal fibrosis remains unknown. METHODS A renal fibrosis model was constructed by unilateral ureteral obstruction (UUO) in male C57BL/6 mice. HE and MASSON stainings were used for histological analysis. The expression level of miR-194 was detected by RT-qPCR. The protein expression was detected by western blotting. The levels of inflammatory cytokines were detected by ELISA. The relationship between miR-194 and Runx1 was further verified by dual luciferase reporter assay. RESULTS The results showed that miR-194 level was downregulated in kidney tissue of UUO mice, accompanied by significantly pathological damage and renal fibrosis. MiR-194 mimics significantly reduced pathological damage and alleviated renal fibrosis that caused by UOO, and inhibited the expression levels of α-SMA and collagen I. In addition, miR-194 mimics also reduced the expression level of serum inflammatory factors. Moreover, in vitro analysis indicated that Runx1 was a downstream target gene of miR-194. Furthermore, mechanism analysis indicated that miR-194 reduced mouse renal fibrosis by inhibiting the Runx1/AKT pathway in vivo and in vitro. CONCLUSION The present findings suggested that miR-194 targets Runx1/Akt pathway to reduce renal fibrosis in UOO-induced mice. This study provides a novel strategy for the prevention and treatment of renal fibrosis.
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Affiliation(s)
- Li Cheng
- Department of Nephrology, Hubei Province, Wuhan No. 1 Hospital, 215# Zhongshan Avenue, Wuhan, 430022, China
| | - Can Tu
- Department of Nephrology, Hubei Province, Wuhan No. 1 Hospital, 215# Zhongshan Avenue, Wuhan, 430022, China
| | - Yonglong Min
- Department of Nephrology, Hubei Province, Wuhan No. 1 Hospital, 215# Zhongshan Avenue, Wuhan, 430022, China
| | - Da He
- Department of Nephrology, Hubei Province, Wuhan No. 1 Hospital, 215# Zhongshan Avenue, Wuhan, 430022, China
| | - Sheng Wan
- Department of Nephrology, Hubei Province, Wuhan No. 1 Hospital, 215# Zhongshan Avenue, Wuhan, 430022, China
| | - Fei Xiong
- Department of Nephrology, Hubei Province, Wuhan No. 1 Hospital, 215# Zhongshan Avenue, Wuhan, 430022, China.
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Nieto-Nicolau N, de la Torre RM, Fariñas O, Savio A, Vilarrodona A, Casaroli-Marano RP. Extrinsic modulation of integrin α6 and progenitor cell behavior in mesenchymal stem cells. Stem Cell Res 2020; 47:101899. [PMID: 32659733 DOI: 10.1016/j.scr.2020.101899] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 06/11/2020] [Accepted: 06/24/2020] [Indexed: 01/07/2023] Open
Abstract
Mesenchymal stem cells (MSC) are heterogeneous cells of complex nature that show different potentials while different culture conditions can modify their functionalities through interactions with the microenviroment. Here, we found that bone marrow (BM) MSC from different donor sources and passages that expressed higher levels of α6 integrin subunit (ITGA6), showed higher clonogenicity, migration and differentiation potential. ITGA6 showed important roles improving these potentials and regulating proliferation through protein kinase B (AKT) pathway and cell cycle inhibitor proteins p53 and p21. Moreover, ITGA6 downregulation impaired migration. Cell confluence regulated ITGA6, increasing its expression in low density cultures and decreasing in high density cultures. Besides, ITGA6- cells expressed ITGA6 when seeded at low densities. We found higher ITGA6 expression on fibronectin substrates at lower confluency. Fibronectin increased proliferation, clonogenicity, activation of AKT, decreased cell cycle inhibitor proteins and augmented growth factors expression. Spheres-derived MSC showed higher ITGA6 expression and enhanced potentials for migration, clonogenicity and proliferation. In conclusion, though there is an intrinsic regulation of ITGA6 expression, associated to the progenitor potential of BM-MSC, this expression is regulated by culture conditions and is translated in changes in cell behavior and proliferation. This knowledge could be used to enhance the potential of BM-MSC for clinical application.
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Affiliation(s)
- Nuria Nieto-Nicolau
- Barcelona Tissue Bank (BTB) & Donor Center, Banc de Sang i Teixits (BST), Barcelona, Spain; CellTec-UB, University of Barcelona, Barcelona, Spain; Institute of Biomedical Research Sant Pau (IIB-Sant Pau), Barcelona, Spain
| | | | - Oscar Fariñas
- Barcelona Tissue Bank (BTB) & Donor Center, Banc de Sang i Teixits (BST), Barcelona, Spain; Institute of Biomedical Research Sant Pau (IIB-Sant Pau), Barcelona, Spain
| | - Andrés Savio
- Barcelona Tissue Bank (BTB) & Donor Center, Banc de Sang i Teixits (BST), Barcelona, Spain; Institute of Biomedical Research Sant Pau (IIB-Sant Pau), Barcelona, Spain
| | - Anna Vilarrodona
- Barcelona Tissue Bank (BTB) & Donor Center, Banc de Sang i Teixits (BST), Barcelona, Spain; Institute of Biomedical Research Sant Pau (IIB-Sant Pau), Barcelona, Spain
| | - Ricardo P Casaroli-Marano
- Barcelona Tissue Bank (BTB) & Donor Center, Banc de Sang i Teixits (BST), Barcelona, Spain; CellTec-UB, University of Barcelona, Barcelona, Spain; Department of Surgery, School of Medicine & Hospital Clinic de Barcelona, University of Barcelona, Barcelona, Spain; Institute of Biomedical Research Sant Pau (IIB-Sant Pau), Barcelona, Spain.
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Lei JH, Yan W, Luo CH, Guo YM, Zhang YY, Wang XH, Su XJ. Cytotoxicity of nonylphenol on spermatogonial stem cells via phosphatidylinositol-3-kinase/ protein kinase B/mammalian target of rapamycin pathway. World J Stem Cells 2020; 12:500-513. [PMID: 32742567 PMCID: PMC7360990 DOI: 10.4252/wjsc.v12.i6.500] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 03/17/2020] [Accepted: 04/09/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND With continuous advancement of industrial society, environmental pollution has become more and more serious. There has been an increase in infertility caused by environmental factors. Nonylphenol (NP) is a stable degradation product widely used in daily life and production and has been proven to affect male fertility. However, the underlying mechanisms therein are unclear. Thus, it is necessary to study the effect and mechanism of NP on spermatogonial stem cells (SSCs).
AIM To investigate the cytotoxic effect of NP on SSCs via the phosphatidylinositol-3-kinase/protein kinase B/mammalian target of rapamycin (PI3K/AKT/mTOR) pathway.
METHODS SSCs were treated with NP at 0, 10, 20 or 30 µmol. MTT assay was performed to evaluate the effect of NP on the proliferation of SSCs. Flow cytometry was conducted to measure SSC apoptosis. The expression of Bad, Bcl-2, cytochrome-c, pro-Caspase 9, SOX-2, OCT-4, Nanog, Nanos3, Stra8, Scp3, GFRα1, CD90, VASA, Nanos2, KIT, PLZF and PI3K/AKT/mTOR-related proteins was observed by western blot, and the mRNA expression of SOX-2, OCT-4 and Nanog was detected by quantitative reverse transcription polymerase chain reaction.
RESULTS Compared with untreated cells (0 μmol NP), SSCs treated with NP at all concentrations showed a decrease in cell proliferation and expression of Bcl-2, Nanog, OCT-4, SOX-2, Nanos3, Stra8, Scp3, GFRα1, CD90, VASA, Nanos2, KIT, and PLZF (P < 0.05), whereas the expression of Bad, cytochrome-c, and pro-Caspase 9 increased significantly (P < 0.05). We further examined the PI3K/AKT/mTOR pathway and found that the phosphorylation of PI3K, AKT, mTORC1, and S6K was significantly decreased by NP at all concentrations compared to that in untreated SSCs (P < 0.05). NP exerted the greatest effect at 30 μmol among all NP concentrations.
CONCLUSION NP attenuated the proliferation, differentiation and stemness maintenance of SSCs while promoting apoptosis and oxidative stress. The associated mechanism may be related to the PI3K/AKT/mTOR pathway.
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Affiliation(s)
- Jun-Hao Lei
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan 430071, Hubei Province, China
| | - Wen Yan
- Department of Radiology, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan 430071, Hubei Province, China
| | - Chun-Hua Luo
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan 430071, Hubei Province, China
| | - Yu-Ming Guo
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan 430071, Hubei Province, China
| | - Yang-Yang Zhang
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan 430071, Hubei Province, China
| | - Xing-Huan Wang
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan 430071, Hubei Province, China
- Center for Evidence-based and Translational Medicine, Wuhan University, Wuhan 430071, Hubei Province, China
| | - Xin-Jun Su
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan University, Wuhan 430071, Hubei Province, China
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Han Z, Wu X, Gao Y, Liu X, Bai J, Gu R, Lan R, Xu B, Xu W. PDK1-AKT signaling pathway regulates the expression and function of cardiac hyperpolarization-activated cyclic nucleotide-modulated channels. Life Sci 2020; 250:117546. [PMID: 32184125 DOI: 10.1016/j.lfs.2020.117546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 03/03/2020] [Accepted: 03/11/2020] [Indexed: 11/18/2022]
Abstract
AIM The enzyme 3-phosphoinositide-dependent protein kinase-1 (PDK1) is associated with cardiac and pathological remodeling and ion channel function regulation. However, whether it regulates hyperpolarization-activated cyclic nucleotide-modulated channels (HCNs) remains unclear. MAIN METHODS In the atrial myocytes of heart-specific PDK1 "knockout" mouse model and neonatal mice, protein kinase B (AKT)-related inhibitors or agonists as well as knockdown or overexpression plasmids were used to study the relationship between PDK1 and HCNs. KEY FINDINGS HCN1 expression and AKT phosphorylation at the Thr308 site were significantly decreased in atrial myocytes after PDK1 knockout or inhibition; in contrast, HCN2 and HCN4 levels were significantly increased. Also, a similar trend of HCNs expression has been observed in cultured atrial myocytes after PDK1 inhibition, as further demonstrated via immunofluorescence and patch-clamp experiments. Moreover, these results of PDK1 overexpression indicate an opposite trend compared with the previous experimental results. However, the results of PDK1 inhibition or overexpression could be reversed by activating or inhibiting AKT, respectively. SIGNIFICANCE These results indicate that the PDK1-AKT signaling pathway is involved in the regulation of HCN mRNA transcription, protein expression, HCN current density, and cell membrane location.
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Affiliation(s)
- Zhonglin Han
- Department of Cardiology, Nanjing University Medical School Affiliated Nanjing Drum Tower Hospital, Nanjing, China
| | - Xiang Wu
- Department of Cardiology, Nanjing University Medical School Affiliated Nanjing Drum Tower Hospital, Nanjing, China
| | - Yuan Gao
- Department of Cardiology, Nanjing University Medical School Affiliated Nanjing Drum Tower Hospital, Nanjing, China
| | - Xuehua Liu
- Department of Cardiology, Nanjing University Medical School Affiliated Nanjing Drum Tower Hospital, Nanjing, China
| | - Jian Bai
- Department of Cardiology, Nanjing University Medical School Affiliated Nanjing Drum Tower Hospital, Nanjing, China
| | - Rong Gu
- Department of Cardiology, Nanjing University Medical School Affiliated Nanjing Drum Tower Hospital, Nanjing, China
| | - RongFang Lan
- Department of Cardiology, Nanjing University Medical School Affiliated Nanjing Drum Tower Hospital, Nanjing, China
| | - Biao Xu
- Department of Cardiology, Nanjing University Medical School Affiliated Nanjing Drum Tower Hospital, Nanjing, China
| | - Wei Xu
- Department of Cardiology, Nanjing University Medical School Affiliated Nanjing Drum Tower Hospital, Nanjing, China.
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Zhang Y, Huang N, Lu H, Huang J, Jin H, Shi J, Jin F. Icariin protects against sodium azide-induced neurotoxicity by activating the PI3K/Akt/GSK-3β signaling pathway. PeerJ 2020; 8:e8955. [PMID: 32341897 PMCID: PMC7179568 DOI: 10.7717/peerj.8955] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 03/21/2020] [Indexed: 01/22/2023] Open
Abstract
Background Icariin (ICA) is one of the major active flavonoids extracted from the traditional Chinese herb Epimedium brevicornum Maxim and has been shown to have neuroprotective effects. This study was designed to investigate the effect of ICA on sodium azide (NaN3)-induced rat adrenal pheochromocytoma (PC12) cell damage and to further examine the underlying mechanisms. Methods To explore its possible mechanism, we used NaN3 (50 mM)-induced neuronal PC12 cell damage. Cell viability was evaluated by CCK-8 and lactate dehydrogenase (LDH) assays. Mitochondrial membrane potential (MMP) was detected by JC-1. Glucose concentration was assessed by the glucose oxidase method. The role of ICA in the PI3K/Akt/GSK-3β signaling pathway was explored by Western blotting. Results The results indicate that pretreatment with ICA reduced NaN3-induced cell damage and significantly reduced the leakage rate of LDH in PC12 cells. ICA pretreatment increased the MMP and a decrease in glucose concentration indicate increased glucose consumption. Furthermore, the protein levels of p-PI3K (p85), PI3K-110α, p-Ser473-Akt and p-Ser9-GSK-3β were markedly decreased in PC12 cells after NaN3 treatment for 24 h, whereas these effects were reverted after pretreatment with ICA. Tau phosphorylation at the Ser396/404 and Thr217 sites was significantly decreased by pretreatment with ICA. Conclusions These results suggest that ICA protects against NaN3-induced neurotoxicity in PC12 cells by activating the PI3K/Akt/GSK-3β signaling pathway.
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Affiliation(s)
- Ying Zhang
- Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China.,Department of Pharmacy, People's Hospital of Zhongmu, Zhengzhou, Henan, China
| | - Nanqu Huang
- National Drug Clinical Trial Institution, The Third Affiliated Hospital of Zunyi Medical University (The First People's Hospital of Zunyi), Zunyi, Guizhou, China
| | - Hao Lu
- Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China
| | - Juan Huang
- Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China.,School of Public Health, Zunyi Medical University, Zunyi, Guizhou, China
| | - Hai Jin
- Institute of Digestive Diseases of Affiliated Hospital, Zunyi Medical University, Zunyi, Guizhou, China
| | - Jingshan Shi
- Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China
| | - Feng Jin
- Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China
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Jabbarzadeh Kaboli P, Salimian F, Aghapour S, Xiang S, Zhao Q, Li M, Wu X, Du F, Zhao Y, Shen J, Cho CH, Xiao Z. Akt-targeted therapy as a promising strategy to overcome drug resistance in breast cancer - A comprehensive review from chemotherapy to immunotherapy. Pharmacol Res 2020; 156:104806. [PMID: 32294525 DOI: 10.1016/j.phrs.2020.104806] [Citation(s) in RCA: 81] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 04/04/2020] [Accepted: 04/05/2020] [Indexed: 12/12/2022]
Abstract
Breast cancer is the most frequently occurring cancer in women. Chemotherapy in combination with immunotherapy has been used to treat breast cancer. Atezolizumab targeting the protein programmed cell death-ligand (PD-L1) in combination with paclitaxel was recently approved by the Food and Drug Administration (FDA) for Triple-Negative Breast Cancer (TNBC), the most incurable type of breast cancer. However, the use of such drugs is restricted by genotype and is effective only for those TNBC patients expressing PD-L1. In addition, resistance to chemotherapy with drugs such as lapatinib, geftinib, and tamoxifen can develop. In this review, we address chemoresistance in breast cancer and discuss Akt as the master regulator of drug resistance and several oncogenic mechanisms in breast cancer. Akt not only directly interacts with the mitogen-activated protein (MAP) kinase signaling pathway to affect PD-L1 expression, but also has crosstalk with Notch and Wnt/β-catenin signaling pathways involved in cell migration and breast cancer stem cell integrity. In this review, we discuss the effects of tyrosine kinase inhibitors on Akt activation as well as the mechanism of Akt signaling in drug resistance. Akt also has a crucial role in mitochondrial metabolism and migrates into mitochondria to remodel breast cancer cell metabolism while also functioning in responses to hypoxic conditions. The Akt inhibitors ipatasertib, capivasertib, uprosertib, and MK-2206 not only suppress cancer cell proliferation and metastasis, but may also inhibit cytokine regulation and PD-L1 expression. Ipatasertib and uprosertib are undergoing clinical investigation to treat TNBC. Inhibition of Akt and its regulators can be used to control breast cancer progression and also immunosuppression, while discovery of additional compounds that target Akt and its modulators could provide solutions to resistance to chemotherapy and immunotherapy.
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Zhang Y, Chen L, Cao Y, Chen S, Xu C, Xing J, Zhang K. LETM1 Promotes Gastric Cancer Cell Proliferation, Migration, and Invasion via the PI3K/Akt Signaling Pathway. J Gastric Cancer 2020; 20:139-151. [PMID: 32595998 PMCID: PMC7311216 DOI: 10.5230/jgc.2020.20.e12] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 03/04/2020] [Accepted: 03/06/2020] [Indexed: 12/14/2022] Open
Abstract
Purpose Globally, there is a high incidence of gastric cancer (GC). Leucine zipper-EF-hand containing transmembrane protein 1 (LETM1) is reported to play a vital role in several human malignancies. However, there is limited understanding of the role of LETM1 in GC. This study aims to investigate the effects of LETM1 on proliferation, migration, and invasion of GC cells. Materials and Methods The expression levels of LETM1 in the normal gastric mucosal epithelial cells (GES-1) and GC cells were analyzed by quantitative real-time polymerase chain reaction and western blotting. CCK-8, wound healing, and Transwell invasion assays were performed to evaluate the effect of LETM1 knockdown or overexpression on the proliferation, migration, and invasion of the GC cells, respectively. Additionally, the effect of LETM1 knockdown or overexpression on GC cell apoptosis was determined by flow cytometry. Furthermore, the effect of LETM1 knockdown or overexpression on the expression levels of PI3K/Akt signaling pathway-related proteins was evaluated by western blotting. Results The GC cells exhibited markedly higher mRNA and protein expression levels of LETM1 than the GES-1 cells. Additionally, the knockdown of LETM1 remarkably suppressed the GC cell proliferation, migration, and invasion, and promoted the apoptosis of GC cells, which were reversed upon LETM1 overexpression. Furthermore, the western blotting analysis indicated that LETM1 facilitates GC progression via the PI3K/Akt signaling pathway. Conclusions LETM1 acts as an oncogenic gene to promote GC cell proliferation, migration, and invasion via the PI3K/Akt signaling pathway. Therefore, LETM1 may be a potential target for GC diagnosis and treatment.
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Affiliation(s)
- Yunfeng Zhang
- Department of Gastroenterology, The Affiliated Provincial Hospital of Anhui Medical University, Hefei, China
| | - Lele Chen
- Department of Gastroenterology, The Affiliated Provincial Hospital of Anhui Medical University, Hefei, China
| | - Yifan Cao
- Department of Gastroenterology, The Affiliated Provincial Hospital of Anhui Medical University, Hefei, China
| | - Si Chen
- Department of Gastroenterology, The Affiliated Provincial Hospital of Anhui Medical University, Hefei, China
| | - Chao Xu
- Department of Gastroenterology, The Affiliated Provincial Hospital of Anhui Medical University, Hefei, China
| | - Jun Xing
- Department of Gastroenterology, The Affiliated Provincial Hospital of Anhui Medical University, Hefei, China
| | - Kaiguang Zhang
- Department of Gastroenterology, The Affiliated Provincial Hospital of Anhui Medical University, Hefei, China
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Feng AL, Han X, Meng X, Chen Z, Li Q, Shu W, Dai H, Zhu J, Yang Z. PRDX2 plays an oncogenic role in esophageal squamous cell carcinoma via Wnt/β-catenin and AKT pathways. Clin Transl Oncol 2020; 22:1838-1848. [PMID: 32130676 DOI: 10.1007/s12094-020-02323-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Accepted: 02/12/2020] [Indexed: 12/16/2022]
Abstract
PURPOSE To investigate the role of PRDX2 in esophageal carcinoma (ESCA). METHODS The expression of PRDX2 was detected in ESCA tissues. And PRDX2 expression in two ESCA cell lines was knocked down. Cell proliferation, metastasis and invasion were detected in these cells. RESULTS Here, we found that PRDX2 expression was significantly increased in ESCA tissues and was associated with a poor prognosis in ESCA patients. In addition, PRDX2 expression was significantly associated with pathological grading, infiltration degree and 5-year survival time in ESCA patients. Next, we knocked down PRDX2 expression by PRDX2-shRNA transfection in two ESCA cell lines, Eca-109 and TE-1. Proliferation analysis indicated that in vitro PRDX2 knockdown decreased growth and clone formation of ESCA cells. Scratch and transwell assays indicated that cell migration and invasion were significantly inhibited by PRDX2 knockdown. In addition, PRDX2 knockdown inhibited cell cycle of ESCA cells and down-regulated Cyclin D1-CDK4/6. Moreover, PRDX2 knockdown regulated proteins involved in mitochondrial-dependent apoptosis, including increased Bax and Caspase9/3 and decreased Bcl2. Mechanism investigation indicated that PRDX2 knockdown led to inactivation of Wnt/β-catenin and AKT pathways. CONCLUSIONS Our data suggest that PRDX2 may function as an oncogene in the development of ESCA via regulating Wnt/β-catenin and AKT pathways. Our study fills a gap in the understanding of the role of PRDX2 in ESCA and provides a potential target for ESCA treatment.
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Affiliation(s)
- A L Feng
- Department of Oncology, Shandong Provincial Hospital Affiliated To Shandong University, 324# Jing 5 Road, Jinan, 250021, People's Republic of China
| | - X Han
- Experimental Department, Affiliated Tumor Hospital of Guangxi Medical University, 71# Hedi Road, Nanning, 530021, People's Republic of China
| | - X Meng
- Department of Oncology, Shandong Provincial Hospital Affiliated To Shandong University, 324# Jing 5 Road, Jinan, 250021, People's Republic of China
| | - Z Chen
- Department of Oncology, Shandong Provincial Hospital Affiliated To Shandong University, 324# Jing 5 Road, Jinan, 250021, People's Republic of China
| | - Q Li
- Department of Oncology, Shandong Provincial Hospital Affiliated To Shandong University, 324# Jing 5 Road, Jinan, 250021, People's Republic of China
| | - W Shu
- Department of Oncology, Shandong Provincial Hospital Affiliated To Shandong University, 324# Jing 5 Road, Jinan, 250021, People's Republic of China
| | - H Dai
- Department of Oncology, Shandong Provincial Hospital Affiliated To Shandong University, 324# Jing 5 Road, Jinan, 250021, People's Republic of China
| | - J Zhu
- Department of General Surgery, The First Affiliated Hospital of Shandong First Medical University, 16766# Jingshi Road, Jinan, 250014, People's Republic of China.
| | - Z Yang
- Department of Oncology, Shandong Provincial Hospital Affiliated To Shandong University, 324# Jing 5 Road, Jinan, 250021, People's Republic of China.
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Kim WY, Cai WT, Jang JK, Kim JH. Ezrin-radixin-moesin proteins are regulated by Akt-GSK3β signaling in the rat nucleus accumbens core. Korean J Physiol Pharmacol 2020; 24:121-126. [PMID: 31908581 PMCID: PMC6940492 DOI: 10.4196/kjpp.2020.24.1.121] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 11/15/2019] [Accepted: 11/20/2019] [Indexed: 11/15/2022]
Abstract
The ezrin-radixin-moesin (ERM) proteins are a family of membrane-associated proteins known to play roles in cell-shape determination as well as in signaling pathways. We have previously shown that amphetamine decreases phosphorylation levels of these proteins in the nucleus accumbens (NAcc), an important neuronal substrate mediating rewarding effects of drugs of abuse. In the present study, we further examined what molecular pathways may be involved in this process. By direct microinjection of LY294002, a PI3 kinase inhibitor, or of S9 peptide, a proposed GSK3β activator, into the NAcc core, we found that phosphorylation levels of ERM as well as of GSK3β in this site are simultaneously decreased. These results indicate that ERM proteins are under the regulation of Akt-GSK3β signaling pathway in the NAcc core. The present findings have a significant implication to a novel signal pathway possibly leading to structural plasticity in relation with drug addiction.
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Affiliation(s)
- Wha Young Kim
- Department of Physiology, Brain Korea 21 Plus Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Korea
| | - Wen Ting Cai
- Department of Medical Science, Brain Korea 21 Plus Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Korea
| | | | - Jeong-Hoon Kim
- Department of Physiology, Brain Korea 21 Plus Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Korea.,Department of Medical Science, Brain Korea 21 Plus Project for Medical Science, Yonsei University College of Medicine, Seoul 03722, Korea
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Rattanachitthawat N, Pinkhien T, Opanasopit P, Ngawhirunpat T, Chanvorachote P. Finasteride Enhances Stem Cell Signals of Human Dermal Papilla Cells. In Vivo 2019; 33:1209-1220. [PMID: 31280211 DOI: 10.21873/invivo.11592] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 06/06/2019] [Accepted: 06/10/2019] [Indexed: 12/22/2022]
Abstract
BACKGROUND/AIM Finasteride (FN) has been widely used to treat androgenetic alopecia (AGA). This study aimed at exploring the effect of FN on DP stem cell properties. MATERIALS AND METHODS Effect of FN on stem cell properties was tested in a DP cell line and 2 human primary DP cells (HDPCs1 and HDPCs2). Cell toxicity and growth were analyzed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. The aggregation behavior was observed by phase-contrast microscopy and a scanning electron microscope (SEM). Effects of FN on cell signaling were determined by western blotting and immunocytochemistry. RESULTS Treatment of DPCs with FN was able to significantly increase their aggregation behavior and the expression of stem cell transcription factors Nanog and Sox-2, when compared to the non-treated control. FN up-regulated stem cell regulatory proteins through the activation of protein kinase B (AKT), β-catenin, and integrin-β1. CONCLUSION FN had an interesting biological effect on stem cell induction. These findings support the use of this drug for hair loss control and the development of regeneration approaches.
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Affiliation(s)
- Napapat Rattanachitthawat
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Silpakorn University, Sanamchan Palace Campus, Nakhon Pathom, Thailand.,Pharmaceutical Development of Green Innovation Group (PDGIG), Faculty of Pharmacy, Silpakorn University, Sanamchan Palace Campus, Nakhon Pathom, Thailand
| | - Tatchakorn Pinkhien
- Cell-Based Drug and Health Product Development Research Unit, Faculty of Pharmaceutical Science, Chulalongkorn University, Bangkok, Thailand
| | - Praneet Opanasopit
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Silpakorn University, Sanamchan Palace Campus, Nakhon Pathom, Thailand.,Pharmaceutical Development of Green Innovation Group (PDGIG), Faculty of Pharmacy, Silpakorn University, Sanamchan Palace Campus, Nakhon Pathom, Thailand
| | - Tanasait Ngawhirunpat
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Silpakorn University, Sanamchan Palace Campus, Nakhon Pathom, Thailand .,Pharmaceutical Development of Green Innovation Group (PDGIG), Faculty of Pharmacy, Silpakorn University, Sanamchan Palace Campus, Nakhon Pathom, Thailand
| | - Pithi Chanvorachote
- Cell-Based Drug and Health Product Development Research Unit, Faculty of Pharmaceutical Science, Chulalongkorn University, Bangkok, Thailand .,Department of Pharmacology and Physiology, Faculty of Pharmaceutical Science, Chulalongkorn University, Bangkok, Thailand
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Abstract
BACKGROUND AKT, also known as protein kinase B, is a key element of the PI3K/AKT signaling pathway. Moreover, AKT regulates the hallmarks of cancer, e.g. tumor growth, survival and invasiveness of tumor cells. After AKT was discovered in the early 1990s, further studies revealed that there are three different AKT isoforms, namely AKT1, AKT2 and AKT3. Despite their high similarity of 80%, the distinct AKT isoforms exert non-redundant, partly even opposing effects under physiological and pathological conditions. Breast cancer as the most common cancer entity in women, frequently shows alterations of the PI3K/AKT signaling. MAIN CONTENT A plethora of studies addressed the impact of AKT isoforms on tumor growth, metastasis and angiogenesis of breast cancer as well as on therapy response and overall survival in patients. Therefore, this review aimed to give a comprehensive overview about the isoform-specific effects of AKT in breast cancer and to summarize known downstream and upstream mechanisms. Taking account of conflicting findings among the studies, the majority of the studies reported a tumor initiating role of AKT1, whereas AKT2 is mainly responsible for tumor progression and metastasis. In detail, AKT1 increases cell proliferation through cell cycle proteins like p21, p27 and cyclin D1 and impairs apoptosis e.g. via p53. On the downside AKT1 decreases migration of breast cancer cells, for instance by regulating TSC2, palladin and EMT-proteins. However, AKT2 promotes migration and invasion most notably through regulation of β-integrins, EMT-proteins and F-actin. Whilst AKT3 is associated with a negative ER-status, findings about the role of AKT3 in regulation of the key properties of breast cancer are sparse. Accordingly, AKT1 is mutated and AKT2 is amplified in some cases of breast cancer and AKT isoforms are associated with overall survival and therapy response in an isoform-specific manner. CONCLUSIONS Although there are several discussed hypotheses how isoform specificity is achieved, the mechanisms behind the isoform-specific effects remain mostly unrevealed. As a consequence, further effort is necessary to achieve deeper insights into an isoform-specific AKT signaling in breast cancer and the mechanism behind it.
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Affiliation(s)
- Nico Hinz
- Institute of Biochemistry and Signal Transduction, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany
| | - Manfred Jücker
- Institute of Biochemistry and Signal Transduction, University Medical Center Hamburg-Eppendorf, Martinistraße 52, 20246, Hamburg, Germany.
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Huang N, Zhang Y, Chen M, Jin H, Nie J, Luo Y, Zhou S, Shi J, Jin F. Resveratrol delays 6-hydroxydopamine-induced apoptosis by activating the PI3K/Akt signaling pathway. Exp Gerontol 2019; 124:110653. [PMID: 31295526 DOI: 10.1016/j.exger.2019.110653] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 05/30/2019] [Accepted: 07/05/2019] [Indexed: 01/10/2023]
Abstract
This study aimed to determine whether resveratrol (Res) delays the progression of 6-hydroxydopamine (6-OHDA)-induced apoptosis via activating the phosphoinositide 3-kinase (PI3K)/protein kinase B (Akt) signaling pathway. Sprague-Dawley (SD) rats were unilaterally injected with 6-OHDA (8 μg/4 μL) into the substantia nigra of the midbrain. Res (15 and 30 mg/kg) was given orally to the rats for a total of 36 days to examine its protective effects. We first tested whether Res can delay the progression of 6-OHDA-induced damage by measuring weight and performance on behavioral tests (rotarod, open field test and grid test) and further explored whether this effect is related to the activation of the PI3K/Akt signaling pathway using immunohistochemistry (IHC) and Western blotting (WB). Our results showed that the damage induced by 6-OHDA gradually worsened, while Res 30 mg/kg treatment significantly improved motor function and increased body weight. Compared with those in the model group, the number of dopaminergic neurons cells and the expression of PI3K-110α, p-Akt Ser473, and pro-caspase-3 in the Res 30 mg/kg group were significantly increased, and the Bax/Bcl-2 ratio and the level of activated caspase-3 was decreased. The results indicate that Res ameliorates 6-OHDA-induced apoptosis and motor dysfunction via activating the PI3K/Akt signaling pathway, delaying the progression of Parkinson's disease (PD) symptoms in this model.
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Affiliation(s)
- Nanqu Huang
- Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Guizhou, China; Drug Clinical Trial Institution, The First People's Hospital of Zunyi & The Third Affiliated Hospital of Zunyi Medical University, Guizhou, China
| | - Ying Zhang
- Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Guizhou, China
| | - Mingji Chen
- Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Guizhou, China
| | - Hai Jin
- Institute of Digestive Diseases of Affiliated Hospital, Zunyi Medical University, Guizhou, China
| | - Jing Nie
- Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Guizhou, China
| | - Yong Luo
- Department of Neurology, The First People's Hospital of Zunyi & The Third Affiliated Hospital of Zunyi Medical University, Guizhou, China
| | - Shaoyu Zhou
- Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Guizhou, China; Department of Environmental Health, Indiana University Bloomington, IN, United States
| | - Jingshan Shi
- Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Guizhou, China
| | - Feng Jin
- Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Guizhou, China.
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Zhong H, Wu H, Bai H, Wang M, Wen J, Gong J, Miao M, Yuan F. Panax notoginseng saponins promote liver regeneration through activation of the PI3K/AKT/mTOR cell proliferation pathway and upregulation of the AKT/Bad cell survival pathway in mice. Altern Ther Health Med 2019; 19:122. [PMID: 31182089 PMCID: PMC6558887 DOI: 10.1186/s12906-019-2536-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 05/29/2019] [Indexed: 12/15/2022]
Abstract
Backgroud The regenerative capacity of the liver is crucial for the host to survive after serious hepatic injuries, tumor resection, or living donor liver transplantation. Panax notoginseng saponins (PNS) have been reported to exert protective effects during organ injuries. The present study aimed to evaluate the effect of PNS on liver regeneration(LR) and on injuries induced by partial hepatectomy (PH). Methods We performed 70% partial PH on C57BL/6 J mice treated with or without PNS. LR was estimated by liver weight/body weight, serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels and cell proliferation, and the related cellular signals were analyzed by Western blot. Results Different concentrations of PNS promoted hepatocyte proliferation in vitro. Mice in the PNS group showed higher liver/body weight ratios at 2 d and 7 d (P < 0.05) after PH and lower levels of serum ALT and AST (P < 0.05) compared to those of mice in the normal control (NC) group. Histological analysis showed that the expression of proliferating cell nuclear antigen(PCNA) at 2 d and 7 d after PH was significantly higher in the PNS group than in the NC group (P < 0.05). Mechanistically, the AKT/mTOR cell proliferation pathway and AKT/Bad cell survival pathway were activated by PNS, which accelerated hepatocyte proliferation and inhibited apoptosis (P < 0.05). Conclusions PNS promoted liver regeneration through activation of PI3K/AKT/mTOR and upregulated the AKT/Bad cell pathways in mice.
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Landucci E, Gencarelli M, Mazzantini C, Laurino A, Pellegrini-Giampietro DE, Raimondi L. N-(3-Ethoxy-phenyl)-4-pyrrolidin-1-yl-3-trifluoromethyl-benzamide (EPPTB) prevents 3-iodothyronamine (T1AM)-induced neuroprotection against kainic acid toxicity. Neurochem Int 2019; 129:104460. [PMID: 31075293 DOI: 10.1016/j.neuint.2019.05.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 04/30/2019] [Accepted: 05/07/2019] [Indexed: 11/17/2022]
Abstract
Thyroid hormone and thyroid hormone metabolites, including 3-iodothyronamine (T1AM) and 3-iodothyroacetic acid (TA1), activate AKT signaling in hippocampal neurons affording protection from excitotoxic damage. We aim to explore whether the mechanism of T1AM neuroprotection against kainic acid (KA)-induced excitotoxicity included the activation of the trace amine associated receptor isoform 1 (TAAR1), one of T1AM targets. Rat organotypic hippocampal slices were exposed to vehicle (Veh) or to 5 μM kA for 24 h in the absence or presence of 0.1, 1 and 10 μM T1AM or to 0.1, 1 and 10 μM T1AM and 1 μM N-(3-Ethoxy-phenyl)-4-pyrrolidin-1-yl-3-trifluoromethyl-benzamide (EPPTB), the only available TAAR1 antagonist, or to 1 μM T1AM in the absence or in the presence of 10 μM LY294002, an inhibitor of phosphoinositide 3-kinases (PI3Ks). Cell death was evaluated by measuring propidium iodide (PI) levels of fluorescence 24 h after treatment. In parallel, the expression levels of p-AKT and p-PKA were evaluated by Western blot analysis of slice lysates. The activity of mitochondrial monoamine oxidases (MAO) was assayed fluorimetrically. 24 h exposure of slices to T1AM resulted in the activation of AKT and PKA. KA exposure induced cell death in the CA3 region and significantly reduced p-AKT and p-PKA levels. The presence of 1 and 10 μM T1AM significantly protected neurons from death and conserved both kinase levels with the essential role of AKT in neuroprotection. Furthermore, EPPTB prevented T1AM-induced neuroprotection, activation of PKA and AKT. Of note, in the presence of EPPTB T1AM degradation by MAO was reduced. Our results indicate that the neuroprotection offered by T1AM depends, as for TA1, on AKT activation but do not allow to conclusively indicate TAAR1 as the target implicated.
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Affiliation(s)
- Elisa Landucci
- Dept. of Health Sciences, Section of Pharmacology, University of Florence, 50139, Florence, Italy
| | - Manuela Gencarelli
- Dept. of Neurology, Psychology, Drug Sciences and Child Health, Section of Pharmacology, University of Florence, 50139, Florence, Italy
| | - Costanza Mazzantini
- Dept. of Neurology, Psychology, Drug Sciences and Child Health, Section of Pharmacology, University of Florence, 50139, Florence, Italy
| | - Annunziatina Laurino
- Dept. of Neurology, Psychology, Drug Sciences and Child Health, Section of Pharmacology, University of Florence, 50139, Florence, Italy
| | | | - Laura Raimondi
- Dept. of Neurology, Psychology, Drug Sciences and Child Health, Section of Pharmacology, University of Florence, 50139, Florence, Italy.
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Shapiro LP, Kietzman HW, Guo J, Rainnie DG, Gourley SL. Rho-kinase inhibition has antidepressant-like efficacy and expedites dendritic spine pruning in adolescent mice. Neurobiol Dis 2019; 124:520-530. [PMID: 30593834 PMCID: PMC6365018 DOI: 10.1016/j.nbd.2018.12.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 11/15/2018] [Accepted: 12/21/2018] [Indexed: 12/29/2022] Open
Abstract
Adolescence represents a critical period of neurodevelopment, defined by structural and synaptic pruning within the prefrontal cortex. While characteristic of typical development, this structural instability may open a window of vulnerability to developing neuropsychiatric disorders, including depression. Thus, therapeutic interventions that support or expedite neural remodeling in adolescence may be advantageous. Here, we inhibited the neuronally-expressed cytoskeletal regulatory factor Rho-kinase (ROCK), focusing primarily on the clinically-viable ROCK inhibitor fasudil. ROCK inhibition had rapid antidepressant-like effects in adolescent mice, and its efficacy was comparable to ketamine and fluoxetine. It also modified levels of the antidepressant-related signaling factors, tropomyosin/tyrosine receptor kinase B and Akt, as well as the postsynaptic marker PSD-95, in the ventromedial prefrontal cortex (vmPFC). Meanwhile, adolescent-typical dendritic spine pruning on excitatory pyramidal neurons in the vmPFC was expedited. Further, vmPFC-specific shRNA-mediated reduction of ROCK2, the dominant ROCK isoform in the brain, had antidepressant-like consequences. We cautiously suggest that ROCK inhibitors may have therapeutic potential for adolescent-onset depression.
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Affiliation(s)
- Lauren P Shapiro
- Molecular and Systems Pharmacology, Emory University, Atlanta, GA, United States; Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, United States; Yerkes National Primate Research Center, Emory University, Atlanta, GA, United States
| | - Henry W Kietzman
- Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, United States; Yerkes National Primate Research Center, Emory University, Atlanta, GA, United States; Graduate Program in Neuroscience, Emory University, Atlanta, GA, United States
| | - Jidong Guo
- Yerkes National Primate Research Center, Emory University, Atlanta, GA, United States; Department of Psychiatry, Emory University School of Medicine, Atlanta, GA, United States
| | - Donald G Rainnie
- Yerkes National Primate Research Center, Emory University, Atlanta, GA, United States; Department of Psychiatry, Emory University School of Medicine, Atlanta, GA, United States
| | - Shannon L Gourley
- Molecular and Systems Pharmacology, Emory University, Atlanta, GA, United States; Department of Pediatrics, Emory University School of Medicine, Atlanta, GA, United States; Yerkes National Primate Research Center, Emory University, Atlanta, GA, United States; Graduate Program in Neuroscience, Emory University, Atlanta, GA, United States; Department of Psychiatry, Emory University School of Medicine, Atlanta, GA, United States.
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Zhang Y, Huang N, Chen M, Jin H, Nie J, Shi J, Jin F. Procyanidin protects against 6-hydroxydopamine-induced dopaminergic neuron damage via the regulation of the PI3K/Akt signalling pathway. Biomed Pharmacother 2019; 114:108789. [PMID: 30925459 DOI: 10.1016/j.biopha.2019.108789] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 02/21/2019] [Accepted: 03/13/2019] [Indexed: 12/15/2022] Open
Abstract
Over the past 200 years, Parkinson's disease (PD) has remained an insurmountable challenge. Despite the existence of numerous therapeutic drugs, there are still not enough treatments in the face of the complex pathogenesis of PD. Therefore, the search for more effective therapeutic drugs for PD has extremely important practical significance. Procyanidin (PC), widely found in plants such as grapes, is a bioflavonoid antioxidant with a special molecular structure that can effectively remove free radicals in the human body. To explore its possible mechanism in PD, we used 6-hydroxydopamine (6-OHDA, 8 μg) to mimic dopaminergic (DA) neuronal damage and validated this model in vivo and in vitro. in vivo, we detected an effect of PC (60 mg/kg) on the behavioural changes exhibited in 6-OHDA model rats, the number of DA neurons and the phosphorylation of protein kinase B (Akt). in vitro, we detected changes in cell viability, mitochondrial membrane potential (MMP) and total superoxide dismutase (SOD) and explored the role of PC (50 μM) by inhibiting the phosphoinositide 3-kinase (PI3K)/Akt signalling pathway with LY294002 (20 μM). The present study demonstrates that PC plays a protective role against 6-OHDA-induced neurotoxicity, which may be mediated through the activation of the PI3K/Akt signalling pathway. This study indicates a potential use for PC in the treatment and prevention of PD.
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Affiliation(s)
- Ying Zhang
- Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Guizhou, China
| | - Nanqu Huang
- Drug Clinical Trial Institution, The First People's Hospital of Zunyi, Guizhou, China
| | - Mingji Chen
- Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Guizhou, China
| | - Hai Jin
- Institute of Digestive Diseases of Affiliated Hospital, Zunyi Medical University, Guizhou, China
| | - Jing Nie
- Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Guizhou, China
| | - Jingshan Shi
- Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Guizhou, China
| | - Feng Jin
- Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Guizhou, China.
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Altman AM, Mahmud J, Nikolovska-Coleska Z, Chan G. HCMV modulation of cellular PI3K/AKT/mTOR signaling: New opportunities for therapeutic intervention? Antiviral Res 2019; 163:82-90. [PMID: 30668978 PMCID: PMC6391997 DOI: 10.1016/j.antiviral.2019.01.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 01/09/2019] [Accepted: 01/16/2019] [Indexed: 12/15/2022]
Abstract
Human cytomegalovirus (HCMV) remains a major public health burden domestically and abroad. Current approved therapies, including ganciclovir, are only moderately efficacious, with many transplant patients suffering from a variety of side effects. A major impediment to the efficacy of current anti-HCMV drugs is their antiviral effects are restricted to the lytic stage of viral replication. Consequently, the non-lytic stages of the viral lifecycle remain major sources of HCMV infection associated with transplant recipients and ultimately the cause of morbidity and mortality. While work continues on new antivirals that block lytic replication, the dormant stages of HCMV's unique lifecycle need to be concurrently assessed for new therapeutic interventions. In this review, we will examine the role that the PI3K/Akt/mTOR signaling axis plays during the different stages of HCMV's lifecycle, and describe the advantages of targeting this cellular pathway as an antiviral strategy. In particular, we focus on the potential of exploiting the unique modifications HCMV imparts on the PI3K/Akt/mTOR pathway during quiescent infection of monocytes, which serve an essential role in the dissemination strategy of the virus.
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Affiliation(s)
- Aaron M Altman
- Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY 13210, USA
| | - Jamil Mahmud
- Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY 13210, USA
| | | | - Gary Chan
- Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY 13210, USA.
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Zhang FL, Chu SL, Wang WW, Chen LL. [Downregulated PI3K-Akt-eNOS expression is related to increased atrial fibrillation inducibility in diabetic rats]. Zhonghua Xin Xue Guan Bing Za Zhi 2018; 46:376-81. [PMID: 29804440 DOI: 10.3760/cma.j.issn.0253-3758.2018.05.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the impact of PI3K-Akt-eNOS signaling on atrial fibrillation inducibility in diabetic rats. Method: Eight-week-old male diabetic rats were randomized assigned into GK group, IGF group and L-NAME group (n=8 each) which respectively received normal saline (NS), insulin like growth factor (IGF-1) or L-NAME+IGF-1 through tail vein daily for 4 weeks. Eight 8-week-old male homologous Wister-Kyoto(WKY) rats treated with intravenous NS served as control group (WKY group). Blood glucose was measured once per week. The left atrial diameter (LAD) was measured by echocardiography, the atrial electrical parameters, including the P-wave duration, the atrial effective refractory period (AERP) and its dispersion (AERP-d), the incidence and the duration of atrial fibrillation induced by atrial burst pacing, were evaluated by electro-physiological instrument at 4 weeks post various treatments. Rats were then sacrificed, left atrial (LA) cell morphology was determined on HE stained sections, LA interstitial collagen was determined on Masson stained sections. The protein expression of phosphatidylinositol 3-kinase (PI3K) and phosphate endothelial nitric oxide synthase (p-eNOS) were detected by Western blot. Results: (1) At the beginning of the study, the random blood glucose (GLU) level was significantly higher and LAD was large in GK, IGF and L-NAME groups than in WKY group;after 4 weeks, GLU level and LAD dimension of IGF group were lower than GK and L-NAME groups (P<0.01 or 0.05). (2) One rat in L-NAME group died during operation. Four weeks later, the incidence of atrial fibrillation in GK group, IGF group, L-NAME group and WKY group was 7/8, 2/8, 6/7 and 3/8. The median duration of atrial fibrillation in GK group, IGF group, L-NAME group and WKY group was 11.9(9.3, 13.1), 0(0, 1.8), 11.5(4.4, 12.0), and 0(0, 3.0) s. Compare with WKY group, the P-wave duration and PR interval were significantly longer, AERP-d, incidence, and duration of atrial fibrillation were significantly higher in GK group (P<0.01), these changed were significantly reversed in IGF group compared to GK and L-NAME groups (all P<0.01). Heart rate and AERP were similar among the 4 groups on (P>0.05). (3) Four weeks later, the CSA and CVF of LA were significantly larger in GK group than in WKY group (P<0.01), which were significantly reversed in IGF group (P<0.01 vs. GK group), and the beneficial effects of IGF disappeared by co-treatment with L-NAME (P<0.01 vs. IGF group). (4) Four weeks later, compare with WKY group, the protein expression of PI3K (P<0.01) and p-eNOS (P<0.05) of LA were significantly downregulated in GK group, which could be significantly upregulated by IGF (P<0.01 and 0.05 vs. GK group), these effects diminished by co-treatment with L-NAME (P<0.01 or 0.05 vs. IGF group). Conclusion: Increased atrial fibrillation susceptibility in diabetic rat is linked with structural and electrical remodeling in LA, possibly mediated through downregulated PI3K-Akt-eNOS signaling.
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