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Zhou J, Sun X, Chen X, Liu H, Miao X, Guo Y, Fan Z, Li J, Xu Y, Li Z. Phosphatidic acid-enabled MKL1 contributes to liver regeneration: Translational implication in liver failure. Acta Pharm Sin B 2024; 14:256-272. [PMID: 38261867 PMCID: PMC10793099 DOI: 10.1016/j.apsb.2023.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 09/05/2023] [Accepted: 09/13/2023] [Indexed: 01/25/2024] Open
Abstract
Liver regeneration following injury aids the restoration of liver mass and the recovery of liver function. In the present study we investigated the contribution of megakaryocytic leukemia 1 (MKL1), a transcriptional modulator, to liver regeneration. We report that both MKL1 expression and its nuclear translocation correlated with hepatocyte proliferation in cell and animal models of liver regeneration and in liver failure patients. Mice with MKL1 deletion exhibited defective regenerative response in the liver. Transcriptomic analysis revealed that MKL1 interacted with E2F1 to program pro-regenerative transcription. MAPKAPK2 mediated phosphorylation primed MKL1 for its interaction with E2F1. Of interest, phospholipase d2 promoted MKL1 nuclear accumulation and liver regeneration by catalyzing production of phosphatidic acid (PA). PA administration stimulated hepatocyte proliferation and enhanced survival in a MKL1-dependent manner in a pre-clinical model of liver failure. Finally, PA levels was detected to be positively correlated with expression of pro-regenerative genes and inversely correlated with liver injury in liver failure patients. In conclusion, our data reveal a novel mechanism whereby MKL1 contributes to liver regeneration. Screening for small-molecule compounds boosting MKL1 activity may be considered as a reasonable approach to treat acute liver failure.
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Affiliation(s)
- Jiawen Zhou
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing 211198, China
| | - Xinyue Sun
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing 211198, China
| | - Xuelian Chen
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing 211198, China
| | - Huimin Liu
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing 211198, China
| | - Xiulian Miao
- Institute of Biomedical Research, Liaocheng University, Liaocheng 252200, China
| | - Yan Guo
- Institute of Biomedical Research, Liaocheng University, Liaocheng 252200, China
| | - Zhiwen Fan
- Department of Pathology, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China
| | - Jie Li
- Department of Infectious Diseases, Nanjing Drum Tower Hospital Affiliated with Nanjing University Medical School, Nanjing 210008, China
- Institute of Viruses and Infectious Diseases, Nanjing University, Nanjing 210008, China
| | - Yong Xu
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing 211198, China
- Institute of Biomedical Research, Liaocheng University, Liaocheng 252200, China
| | - Zilong Li
- State Key Laboratory of Natural Medicines, Department of Pharmacology, China Pharmaceutical University, Nanjing 211198, China
- Institute of Biomedical Research, Liaocheng University, Liaocheng 252200, China
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Carreño A, Lykke-Andersen J. The Conserved CNOT1 Interaction Motif of Tristetraprolin Regulates ARE-mRNA Decay Independently of the p38 MAPK-MK2 Kinase Pathway. Mol Cell Biol 2022; 42:e0005522. [PMID: 35920669 PMCID: PMC9476947 DOI: 10.1128/mcb.00055-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The regulation of the mRNA decay activator Tristetraprolin (TTP) by the p38 mitogen-activated protein kinase (MAPK) pathway during the mammalian inflammatory response represents a paradigm for the control of mRNA turnover by signaling. TTP activity is regulated through multiple phosphorylation sites, including an evolutionary conserved serine in its CNOT1 Interacting Motif (CIM) whose phosphorylation disrupts an interaction with CNOT1 of the CCR4-NOT deadenylase complex. Here we present evidence that the TTP CIM recruits the CCR4-NOT deadenylase complex and activates mRNA degradation cooperatively with the conserved tryptophan residues of TTP, previously identified to interact with CNOT9. Surprisingly, the TTP CIM remains unphosphorylated and capable of promoting association with the CCR4-NOT complex and mRNA decay upon activation of p38-MAPK-activated kinase MK2, a well-established regulator of TTP activity. The CIM is instead targeted by other kinases including PKCα. These observations suggest that signaling pathways regulate TTP activity in a cooperative manner and that the p38 MAPK-MK2 kinase pathway relies on the activation of additional kinase pathway(s) to fully control TTP function.
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Affiliation(s)
- Alberto Carreño
- Department of Molecular Biology, School of Biological Sciences, University of California San Diego, La Jolla, California, USA
| | - Jens Lykke-Andersen
- Department of Molecular Biology, School of Biological Sciences, University of California San Diego, La Jolla, California, USA
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Schreiter T, Gieseler RK, Vílchez-Vargas R, Jauregui R, Sowa JP, Klein-Scory S, Broering R, Croner RS, Treckmann JW, Link A, Canbay A. Transcriptome-Wide Analysis of Human Liver Reveals Age-Related Differences in the Expression of Select Functional Gene Clusters and Evidence for a PPP1R10-Governed 'Aging Cascade'. Pharmaceutics 2021; 13:pharmaceutics13122009. [PMID: 34959291 PMCID: PMC8709089 DOI: 10.3390/pharmaceutics13122009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 11/17/2021] [Accepted: 11/21/2021] [Indexed: 12/27/2022] Open
Abstract
A transcriptome-wide analysis of human liver for demonstrating differences between young and old humans has not yet been performed. However, identifying major age-related alterations in hepatic gene expression may pinpoint ontogenetic shifts with important hepatic and systemic consequences, provide novel pharmacogenetic information, offer clues to efficiently counteract symptoms of old age, and improve the overarching understanding of individual decline. Next-generation sequencing (NGS) data analyzed by the Mann-Whitney nonparametric test and Ensemble Feature Selection (EFS) bioinformatics identified 44 transcripts among 60,617 total and 19,986 protein-encoding transcripts that significantly (p = 0.0003 to 0.0464) and strikingly (EFS score > 0.3:16 transcripts; EFS score > 0.2:28 transcripts) differ between young and old livers. Most of these age-related transcripts were assigned to the categories 'regulome', 'inflammaging', 'regeneration', and 'pharmacogenes'. NGS results were confirmed by quantitative real-time polymerase chain reaction. Our results have important implications for the areas of ontogeny/aging and the age-dependent increase in major liver diseases. Finally, we present a broadly substantiated and testable hypothesis on a genetically governed 'aging cascade', wherein PPP1R10 acts as a putative ontogenetic master regulator, prominently flanked by IGFALS and DUSP1. This transcriptome-wide analysis of human liver offers potential clues towards developing safer and improved therapeutic interventions against major liver diseases and increased insights into key mechanisms underlying aging.
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Affiliation(s)
- Thomas Schreiter
- Department of Medicine, University Hospital Knappschaftskrankenhaus Bochum, Ruhr University Bochum, 44892 Bochum, Germany; (T.S.); (R.K.G.); (J.-P.S.); (S.K.-S.)
- Laboratory of Immunology & Molecular Biology, University Hospital Knappschaftskrankenhaus Bochum, Ruhr University Bochum, 44892 Bochum, Germany
| | - Robert K. Gieseler
- Department of Medicine, University Hospital Knappschaftskrankenhaus Bochum, Ruhr University Bochum, 44892 Bochum, Germany; (T.S.); (R.K.G.); (J.-P.S.); (S.K.-S.)
- Laboratory of Immunology & Molecular Biology, University Hospital Knappschaftskrankenhaus Bochum, Ruhr University Bochum, 44892 Bochum, Germany
| | - Ramiro Vílchez-Vargas
- Department of Gastroenterology, Hepatology, and Infectious Diseases, Medical Faculty, Otto-von-Guericke University, 39120 Magdeburg, Germany; (R.V.-V.); (A.L.)
| | - Ruy Jauregui
- Data Science Grasslands, Grasslands Research Centre, AgResearch, Palmerston North 4410, New Zealand;
| | - Jan-Peter Sowa
- Department of Medicine, University Hospital Knappschaftskrankenhaus Bochum, Ruhr University Bochum, 44892 Bochum, Germany; (T.S.); (R.K.G.); (J.-P.S.); (S.K.-S.)
- Laboratory of Immunology & Molecular Biology, University Hospital Knappschaftskrankenhaus Bochum, Ruhr University Bochum, 44892 Bochum, Germany
| | - Susanne Klein-Scory
- Department of Medicine, University Hospital Knappschaftskrankenhaus Bochum, Ruhr University Bochum, 44892 Bochum, Germany; (T.S.); (R.K.G.); (J.-P.S.); (S.K.-S.)
- Laboratory of Immunology & Molecular Biology, University Hospital Knappschaftskrankenhaus Bochum, Ruhr University Bochum, 44892 Bochum, Germany
| | - Ruth Broering
- Department of Gastroenterology and Hepatology, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany;
| | - Roland S. Croner
- Department of General, Visceral, Vascular and Transplantation Surgery, Medical Faculty, Otto-von-Guericke University, 39120 Magdeburg, Germany;
| | - Jürgen W. Treckmann
- Department of General, Visceral and Transplantation Surgery, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany;
| | - Alexander Link
- Department of Gastroenterology, Hepatology, and Infectious Diseases, Medical Faculty, Otto-von-Guericke University, 39120 Magdeburg, Germany; (R.V.-V.); (A.L.)
| | - Ali Canbay
- Department of Medicine, University Hospital Knappschaftskrankenhaus Bochum, Ruhr University Bochum, 44892 Bochum, Germany; (T.S.); (R.K.G.); (J.-P.S.); (S.K.-S.)
- Section of Hepatology and Gastroenterology, University Hospital Knappschaftskrankenhaus Bochum, Ruhr University Bochum, 44892 Bochum, Germany
- Correspondence: ; Tel.: +49-234-299-3401
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Chen H, Chen X, Wang G. Platelets: A review of their function and effects in liver diseases. LIVER RESEARCH 2020. [DOI: 10.1016/j.livres.2020.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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Wang Z, Liang XY, Chang X, Nie YY, Guo C, Jiang JH, Chang M. MMI-0100 Ameliorates Dextran Sulfate Sodium-Induced Colitis in Mice through Targeting MK2 Pathway. Molecules 2019; 24:molecules24152832. [PMID: 31382637 PMCID: PMC6696270 DOI: 10.3390/molecules24152832] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 07/30/2019] [Accepted: 08/02/2019] [Indexed: 01/01/2023] Open
Abstract
Backgrounds: This study aimed to investigate the protective effects of MMI-0100, a cell-penetrating peptide inhibitor of MAPK-activated protein kinase II (MK2), on acute colitis induced by dextran sodium sulfate (DSS). Mice were injected intraperitoneally with different doses of MMI-0100 (0.5 and 1 mg/kg per day, six days). The physiological indexes, the parameters for colonic pathological injury and the intensity of inflammatory responses were evaluated by histological staining, quantitative PCR, western blotting, and immunostaining. MMI-0100 attenuated DSS-induced body weight loss, colon length shortening, and colonic pathological injury, including decreased myeloperoxidase (MPO) and inhibited inflammatory cell infiltration. MMI-0100 suppressed DSS-induced activation of CD11b+ and F4/80 positive cell, and dramatically decreased the expression of a series of pro-inflammatory cytokines such as TNF-α, IL-6, IL-1β, TGF- β, IFN-γ, IL-17A, COX-2 and iNOS. A TUNEL assay showed that MMI-0100 protected against DSS-induced apoptosis. This is consistent with the results of Western blotting assay in apoptosis-related proteins including Bcl-2, BAX, caspase-3. The anti-inflammatory effects of MMI-0100 on DSS-induced colitis were achieved by down-regulating the phosphorylation level of MK2, IκBα and p65 protein. The current study clearly demonstrates a protective role for MMI-0100 in experimental IBD.
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Affiliation(s)
- Zhe Wang
- School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an, Shanxi 710061, China
- Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Xue Ya Liang
- Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Xin Chang
- Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Yao Yan Nie
- Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Chen Guo
- Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Jin Hong Jiang
- Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Min Chang
- Institute of Biochemistry and Molecular Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000, China.
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Ding Y, Liu Y, Fei F, Yang L, Mao G, Zhao T, Zhang Z, Yan M, Feng W, Wu X. Study on the metabolism toxicity, susceptibility and mechanism of di-(2-ethylhexyl) phthalate on rat liver BRL cells with insulin resistance in vitro. Toxicology 2019; 422:102-120. [DOI: 10.1016/j.tox.2019.05.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 04/29/2019] [Accepted: 05/27/2019] [Indexed: 12/16/2022]
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Lee SR, Mun JY, Jeong MS, Lee HH, Roh YG, Kim WT, Kim MH, Heo J, Choi YH, Kim SJ, Cha HJ, Jun M, Leem SH. Thymoquinone-Induced Tristetraprolin Inhibits Tumor Growth and Metastasis through Destabilization of MUC4 mRNA. Int J Mol Sci 2019; 20:ijms20112614. [PMID: 31141941 PMCID: PMC6600862 DOI: 10.3390/ijms20112614] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 05/27/2019] [Accepted: 05/27/2019] [Indexed: 12/15/2022] Open
Abstract
Tristetraprolin (TTP), a well-characterized AU-rich element (ARE) binding protein, functions as a tumor suppressor gene. The purpose of this study was to investigate whether a bioactive substance derived from a natural medicinal plant affects the induction of TTP and to elucidate its mechanism. We examined the effects of natural bioactive materials including Resveratrol (RSV), thymoquinone (TQ) and curcumin on the expression of TTP in cancer cell. TQ derived from a natural plant Nigella sativa increased the expression levels of TTP mRNA and proteins in a dose-dependent manner in gastric and breast cancer cells. TQ-induced TTP increased the instability of MUC4 mRNA by direct binding of TTP to ARE in the 3′UTR of MUC4 mRNA. The induction of TTP by TQ also reduced the proliferation, migration and invasion of cancer cells. The expression of the epithelial-mesenchymal (EMT)-related genes, which were target genes of TTP, was also decreased by the TQ treatment. In the in vivo experiments using mouse melanoma cells, TQ-induced TTP inhibited metastasis of tumor cells. We have found that TQ-induced TTP might inhibit metastasis by reducing tumor cell migration and invasion through destabilization of MUC4 mRNA, which suggest the MUC4 as a novel target to TTP.
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Affiliation(s)
- Se-Ra Lee
- Department of Biological Science, Dong-A University, Busan 49315, Korea.
- Division of Drug Development & Optimization, Osong Medical Innovation Foundation (KBio), Chungbuk 28160, Korea.
| | - Jeong-Yeon Mun
- Department of Biological Science, Dong-A University, Busan 49315, Korea.
| | - Mi-So Jeong
- Department of Biological Science, Dong-A University, Busan 49315, Korea.
| | - Hyun-Hee Lee
- Department of Biological Science, Dong-A University, Busan 49315, Korea.
| | - Yun-Gil Roh
- Department of Biological Science, Dong-A University, Busan 49315, Korea.
| | - Won-Tae Kim
- Department of Biological Science, Dong-A University, Busan 49315, Korea.
| | - Min-Hye Kim
- Department of Biological Science, Dong-A University, Busan 49315, Korea.
| | - Jeonghoon Heo
- Departments of Molecular Biology and Immunology, College of Medicine, Kosin University, Busan 49267, Korea.
| | - Yung Hyun Choi
- Department of Biochemistry, College of Oriental Medicine, Anti-Aging Research Center, Dongeui University, Busan 47227, Korea.
| | - Su Jin Kim
- Department of Pathology, College of Medicine, Dong-A University, Busan 49315, Korea.
| | - Hee-Jae Cha
- Department of Parasitology and Genetics, Kosin University College of Medicine, Busan 602-702, Korea.
| | - Mira Jun
- Department of Food Science and Nutrition, Dong-A University, Busan 49315, Korea.
| | - Sun-Hee Leem
- Department of Biological Science, Dong-A University, Busan 49315, Korea.
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Xu L, Liang Z, Li S, Ma J. Signaling via the CXCR5/ERK pathway is mediated by CXCL13 in mice with breast cancer. Oncol Lett 2018; 15:9293-9298. [PMID: 29844827 DOI: 10.3892/ol.2018.8510] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 01/10/2018] [Indexed: 01/01/2023] Open
Abstract
Breast cancer is the most common cause of cancer-associated mortality and the most frequently diagnosed type of cancer in women worldwide. It has been revealed that the chemokine C-X-C motif chemokine ligand 13 (CXCL13) serves a pivotal role in breast cancer growth and is associated with lymph node metastasis. However, to the best of our knowledge, the mechanism by which CXCL13 mediates breast cancer growth remains uncharacterized. Female BALB/c mice were used in this study. Tumor volume was calculated and changes of gross tumor morphology were observed by hematoxylin and eosin staining. The expression of CXCL13, C-X-C motif chemokine receptor 5 (CXCR5) and extracellular signaling-related kinase (ERK) mRNA and protein expression were detected by reverse transcriptase quantitative-polymerase chain reaction and western blot analysis. Simultaneously, the production of cytokines [interleukin-1β (IL-1β), tumor necrosis factor (TNF) and tumor growth factor β1 (TGF-β1)] was detected by an ELISA. The CXCL13 inhibitor reduced tumor volume and growth, and reduced the mRNA and protein expression levels of key members of the CXCR5/ERK signaling pathway: CXCL13, CXCR5 and ERK. Furthermore, the detectable concentration of the cytokines IL-1β and TNF decreased following CXCL13 inhibition, whereas the concentration of TGF-β1 was increased. The attenuation of tumor growth resulting from CXCL13 inhibition may be associated with the CXCR5/ERK signaling pathway. This study provides a theoretical basis for treating breast cancer through CXCL13 inhibition in clinical trials.
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Affiliation(s)
- Licheng Xu
- Department of Breast Surgery, Yantaishan Hospital, Yantai, Shandong 264002, P.R. China
| | - Zhi Liang
- Department of Breast Surgery, Yantaishan Hospital, Yantai, Shandong 264002, P.R. China
| | - Shuyan Li
- Department of Breast Surgery, Yantaishan Hospital, Yantai, Shandong 264002, P.R. China
| | - Jianjun Ma
- Department of Medical Oncology, The People's Liberation Army 107th Hospital, Yantai, Shandong 264002, P.R. China
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Li Y, Zhang D, Yu K, Hu Y, Wu Q, Qian F, Wang Z. CMPD1 inhibited human gastric cancer cell proliferation by inducing apoptosis and G2/M cell cycle arrest. Biol Res 2018; 51:11. [PMID: 29661232 PMCID: PMC5901880 DOI: 10.1186/s40659-018-0159-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 04/10/2018] [Indexed: 01/02/2023] Open
Abstract
Background Gastric cancer occupies the fourth highest morbidity rate of cancers worldwide. Clinical therapies of gastric cancer remain limited because of uncertainty of mechanisms and shortness of effective medicine. Thus, new drug candidates for gastric cancer treatment is urgently needed. Results In this study, CMPD1 as a wildly used MK2 phosphorylation inhibitor was employed to find its impact on gastric cancer cell proliferation, apoptosis and cell cycle using colony formation assay and flow cytometry analysis. Along with its anti-proliferation effect on gastric cancer cell line MKN-45 and SGC7901, CMPD1 also induced massive apoptosis and significant G2/M phase arrest in a time-dependent and dose-dependent manner in MKN-45 cells respectively. Furthermore, Western blot confirmed that the expression of anti-apoptotic proteins Bcl-2 was decreased while BAX, cytochrome c release and cleaved PARP were increased. In addition, oncogene c-Myc was downregulated in response to CMPD1 treatment. Conclusions Our results demonstrated that CMPD1 has anti-tumor effect on human gastric cancer cell line MKN-45 possibly via downregulating oncogene c-Myc expression and CMPD1 could be applied as a potential candidate for treating gastric malignancy. To the best of our knowledge, it is the first report of anti-tumor effect of CMPD-1 on human gastric cancer cells.
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Affiliation(s)
- Yu Li
- Department of Medical Oncology, The First Affiliated Hospital of Bengbu Medical College, 287 Changhuai Road, Bengbu, 233004, Anhui, People's Republic of China.,Center for Cancer Precision Medicine, Bengbu Medical College, Bengbu, 233003, Anhui, People's Republic of China
| | - Depeng Zhang
- Engineering Research Center of Cell, & Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Kaikai Yu
- Engineering Research Center of Cell, & Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Yudong Hu
- Engineering Research Center of Cell, & Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Qiong Wu
- Department of Medical Oncology, The First Affiliated Hospital of Bengbu Medical College, 287 Changhuai Road, Bengbu, 233004, Anhui, People's Republic of China.,Center for Cancer Precision Medicine, Bengbu Medical College, Bengbu, 233003, Anhui, People's Republic of China
| | - Feng Qian
- Center for Cancer Precision Medicine, Bengbu Medical College, Bengbu, 233003, Anhui, People's Republic of China. .,Engineering Research Center of Cell, & Therapeutic Antibody, Ministry of Education, School of Pharmacy, Shanghai Jiao Tong University, Shanghai, People's Republic of China.
| | - Zishu Wang
- Department of Medical Oncology, The First Affiliated Hospital of Bengbu Medical College, 287 Changhuai Road, Bengbu, 233004, Anhui, People's Republic of China. .,Center for Cancer Precision Medicine, Bengbu Medical College, Bengbu, 233003, Anhui, People's Republic of China.
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Tran DDH, Koch A, Allister A, Saran S, Ewald F, Koch M, Nashan B, Tamura T. Treatment with MAPKAP2 (MK2) inhibitor and DNA methylation inhibitor, 5-aza dC, synergistically triggers apoptosis in hepatocellular carcinoma (HCC) via tristetraprolin (TTP). Cell Signal 2016; 28:1872-1880. [PMID: 27619201 DOI: 10.1016/j.cellsig.2016.09.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 08/29/2016] [Accepted: 09/08/2016] [Indexed: 01/20/2023]
Abstract
Over 100 putative driver genes that are associated with multiple recurrently altered pathways were detected in hepatocellular carcinoma (HCC), suggesting that multiple pathways will need to be inhibited for any therapeutic method to be effective. In this context, functional modification of the RNA regulating protein, tristetraprolin (TTP) that regulates approximately 2500 genes represents a promising strategy in HCC therapy. Since overexpression of TTP induces cell death in all cell types, it would be useful to target the regulator of TTP. In this study, we applied an inhibitor to MAPKAP2 (MK2) that suppresses TTP function. Importantly, cBIOportal for HCC genomics shows that expression level of the MK2 gene correlates with clinical outcome of HCC. We show that upon treatment with MK2 inhibitor, all 5 HCC cell lines, namely HepG2, Huh7, Hep3B, HLE and HLF, reduced cell growth, especially HepG2 and Hep3B cells underwent apoptosis. Simultaneously, TTP target genes such as c-Myc, IER3 or AKT-1 were downregulated. Depletion of the TTP gene rescued cells from apoptosis and restored the TTP-target mRNA expression in the presence of MK2 inhibitor. Furthermore, MK2 was activated in primary HCC that express TTP at high level. The TTP gene was induced upon treatment with DNA methylation inhibitor, 5-aza dC or interferon in three other cell lines, Huh7, HLE or HLF. Upon treatment with MK2 inhibitor and 5-aza dC or interferon these cells underwent apoptosis. The depletion of TTP in these cells partially rescued them from apoptosis, suggesting that the MK2/TTP pathway plays a role in proliferation and maintenance of HCCs. Notably, under the same conditions human hepatocyte cells (THLE-2) did not undergo apoptosis. These data also suggest that MK2 inhibitor with 5-aza dC or interferon may be a useful tool for therapy against HCC.
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Affiliation(s)
- Doan Duy Hai Tran
- Institut fuer Biochemie, OE4310, Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, D-30623 Hannover, Germany
| | - Alexandra Koch
- Institut fuer Biochemie, OE4310, Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, D-30623 Hannover, Germany
| | - Aldrige Allister
- Institut fuer Biochemie, OE4310, Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, D-30623 Hannover, Germany
| | - Shashank Saran
- Institut fuer Biochemie, OE4310, Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, D-30623 Hannover, Germany
| | - Florian Ewald
- Department of Hepatobiliary and Transplant Surgery, University Medical Center Eppendorf, Martinistrasse 52, 20256 Hamburg, Germany
| | - Martina Koch
- Department of Hepatobiliary and Transplant Surgery, University Medical Center Eppendorf, Martinistrasse 52, 20256 Hamburg, Germany
| | - Björn Nashan
- Department of Hepatobiliary and Transplant Surgery, University Medical Center Eppendorf, Martinistrasse 52, 20256 Hamburg, Germany
| | - Teruko Tamura
- Institut fuer Biochemie, OE4310, Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, D-30623 Hannover, Germany.
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