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Kholodenko IV, Kholodenko RV, Yarygin KN. The Crosstalk between Mesenchymal Stromal/Stem Cells and Hepatocytes in Homeostasis and under Stress. Int J Mol Sci 2023; 24:15212. [PMID: 37894893 PMCID: PMC10607347 DOI: 10.3390/ijms242015212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 10/07/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023] Open
Abstract
Liver diseases, characterized by high morbidity and mortality, represent a substantial medical problem globally. The current therapeutic approaches are mainly aimed at reducing symptoms and slowing down the progression of the diseases. Organ transplantation remains the only effective treatment method in cases of severe liver pathology. In this regard, the development of new effective approaches aimed at stimulating liver regeneration, both by activation of the organ's own resources or by different therapeutic agents that trigger regeneration, does not cease to be relevant. To date, many systematic reviews and meta-analyses have been published confirming the effectiveness of mesenchymal stromal cell (MSC) transplantation in the treatment of liver diseases of various severities and etiologies. However, despite the successful use of MSCs in clinical practice and the promising therapeutic results in animal models of liver diseases, the mechanisms of their protective and regenerative action remain poorly understood. Specifically, data about the molecular agents produced by these cells and mediating their therapeutic action are fragmentary and often contradictory. Since MSCs or MSC-like cells are found in all tissues and organs, it is likely that many key intercellular interactions within the tissue niches are dependent on MSCs. In this context, it is essential to understand the mechanisms underlying communication between MSCs and differentiated parenchymal cells of each particular tissue. This is important both from the perspective of basic science and for the development of therapeutic approaches involving the modulation of the activity of resident MSCs. With regard to the liver, the research is concentrated on the intercommunication between MSCs and hepatocytes under normal conditions and during the development of the pathological process. The goals of this review were to identify the key factors mediating the crosstalk between MSCs and hepatocytes and determine the possible mechanisms of interaction of the two cell types under normal and stressful conditions. The analysis of the hepatocyte-MSC interaction showed that MSCs carry out chaperone-like functions, including the synthesis of the supportive extracellular matrix proteins; prevention of apoptosis, pyroptosis, and ferroptosis; support of regeneration; elimination of lipotoxicity and ER stress; promotion of antioxidant effects; and donation of mitochondria. The underlying mechanisms suggest very close interdependence, including even direct cytoplasm and organelle exchange.
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Affiliation(s)
- Irina V. Kholodenko
- Laboratory of Cell Biology, Orekhovich Institute of Biomedical Chemistry, 119121 Moscow, Russia
| | - Roman V. Kholodenko
- Laboratory of Molecular Immunology, Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia;
| | - Konstantin N. Yarygin
- Laboratory of Cell Biology, Orekhovich Institute of Biomedical Chemistry, 119121 Moscow, Russia
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Wang YW, Song HL, Chiang CY, Song HF, Chang HY, Chu CA, Tuan YL, Tsai KH, Ou YC, Chow NH, Tsai YS. The significance of SMARCB1 in the pathogenesis of renal cell carcinoma with rhabdoid features. Transl Oncol 2021; 14:101175. [PMID: 34243015 PMCID: PMC8273225 DOI: 10.1016/j.tranon.2021.101175] [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: 11/06/2020] [Revised: 06/23/2021] [Accepted: 07/04/2021] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Renal cell carcinoma with rhabdoid features (RCC-RF) is an aggressive histologic variant in the adults and is usually unresponsive to standard chemotherapy. METHODS Expression of SMARCB1/INI1 was examined in primary RCC-RF (n = 5). Stable INI1 with/without prostaglandin E2 receptor 1 (EP1) knockdown cell lines were created in the ACHN and 786-O RCC cell lines and measured for epidermal growth factor receptor (EGFR)-related signaling pathways. Chemosensitivity to targeted drugs in vitro was tested after knocking down of INI1 in both cell lines. The outcome of co-targeting of INI1 and EP1 in RCC was examined using a tumorigenicity assay. RESULTS Expression of INI1 was markedly reduced at both transcriptional and translational levels in primary RCC-RF. Immunohistochemical expression of INI1 protein was lost in the nuclei of rhabdoid cells compared with conventional RCC (n = 8). Using two cell lines with different genetic background, we showed that knocking down of INI1 activates the EGFR signaling with up-regulated AKT and ERK pathways and sensitizes cancer cells to Erlotinib treatment in vitro. However, cell-line dependent effects were also demonstrated with reference to impact of INI1 or EP1 on cell growth, migration and response to Gefitinib or Everolimus treatment in vitro. CONCLUSION Inactivation of INI1 may play a role in the pathogenesis of RCC-RF. Erlotinib is recommended in the management of patients with INI1-related RCC.
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Affiliation(s)
- Yi-Wen Wang
- Departments of Pathology, College of Medicine, National Cheng Kung University, Tainan, TAIWAN
| | - Hsiang-Lin Song
- Department of Pathology, National Cheng Kung University Hospital, Tainan, TAIWAN
| | - Cheng-Yao Chiang
- Departments of Pathology, College of Medicine, National Cheng Kung University, Tainan, TAIWAN
| | - Hong-Fang Song
- Institute of Molecular Medicine, College of Medicine, National Cheng Kung University, Tainan, TAIWAN
| | - Hong-Yi Chang
- Department of Biotechnology and Food Technology, College of Engineering, Southern Taiwan University of Science and Technology, Tainan, TAIWAN
| | - Chien-An Chu
- Departments of Pathology, College of Medicine, National Cheng Kung University, Tainan, TAIWAN
| | - Yih-Lin Tuan
- Institute of Molecular Medicine, College of Medicine, National Cheng Kung University, Tainan, TAIWAN
| | - Kun-Hao Tsai
- Institute of Molecular Medicine, College of Medicine, National Cheng Kung University, Tainan, TAIWAN
| | - Yin-Chien Ou
- Departments of Urology, College of Medicine, National Cheng Kung University, Tainan, TAIWAN
| | - Nan-Haw Chow
- Departments of Pathology, College of Medicine, National Cheng Kung University, Tainan, TAIWAN; Department of Pathology, National Cheng Kung University Hospital, Tainan, TAIWAN; Institute of Molecular Medicine, College of Medicine, National Cheng Kung University, Tainan, TAIWAN.
| | - Yuh-Shyan Tsai
- Departments of Urology, College of Medicine, National Cheng Kung University, Tainan, TAIWAN.
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Inhibition of 15-PDGH: a strategy to rejuvenate aged muscles? MOLECULAR BIOMEDICINE 2021; 2:14. [PMID: 35006447 PMCID: PMC8607396 DOI: 10.1186/s43556-020-00025-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 12/30/2020] [Indexed: 02/08/2023] Open
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Shi T, Fujita K, Gong J, Nakahara M, Iwama H, Liu S, Yoneyama H, Morishita A, Nomura T, Tani J, Takuma K, Tadokoro T, Himoto T, Oura K, Tsutsui K, Kobara H, Masaki T. Aspirin inhibits hepatocellular carcinoma cell proliferation in vitro and in vivo via inducing cell cycle arrest and apoptosis. Oncol Rep 2020; 44:457-468. [PMID: 32627038 PMCID: PMC7336451 DOI: 10.3892/or.2020.7630] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 03/10/2020] [Indexed: 12/24/2022] Open
Abstract
Aspirin, a nonsteroidal anti‑inflammatory drug (NSAID), is known to inhibit cell proliferation in a variety of cancers. However, the underlying mechanism of this inhibition remains unknown. We investigated the effects of aspirin on hepatocellular carcinoma (HCC) cells using in vitro and in vivo models. Six HCC cell lines and a liver cancer cell line including Huh‑7 were used in assays that evaluated cell proliferation, cell cycle, and apoptosis. Flow cytometry, enzyme‑linked immunosorbent assay (ELISA), western blot analysis, and phosphorylated receptor tyrosine kinase array were used to evaluate the effects of aspirin on the cells, and microRNAs (miRNAs) were analyzed by a miRNA array chip. The results were validated in vivo using a nude mouse model of Huh‑7‑xenografted tumors. Our results showed that aspirin exhibited an antiproliferative effect on all cell lines. Moreover, aspirin induced G0/G1 cell cycle arrest and modulated the levels of cell cycle‑related molecules such as cyclin E, cyclin D1, and cyclin‑dependent kinase 2 (Cdk2). In addition, aspirin upregulated the levels of caspase‑cleaved cytokeratin 18, increased the proportion of early apoptotic cells, decreased the levels of clusterin and heat shock protein 70 (HSP 70), upregulated the levels of miRNA‑137 and inhibited epidermal growth factor receptor (EGFR) activation. In addition, we observed that aspirin suppressed cell proliferation partially through the miRNA‑137/EGFR pathway. Our in vivo results showed that aspirin reduced the growth of xenograft tumors in nude mice. In conclusion, aspirin was able to inhibit the growth of HCC cells by cell cycle arrest, apoptosis, and alteration of miRNA levels in in vitro and in vivo models.
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Affiliation(s)
- Tingting Shi
- Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kida, Kagawa 761‑0793, Japan
| | - Koji Fujita
- Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kida, Kagawa 761‑0793, Japan
| | - Jian Gong
- Department of Gastroenterology, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Mai Nakahara
- Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kida, Kagawa 761‑0793, Japan
| | - Hisakazu Iwama
- Life Science Research Center, Kagawa University, Kida, Kagawa 761‑0793, Japan
| | - Shi Liu
- Department of Gastroenterology, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Hirohito Yoneyama
- Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kida, Kagawa 761‑0793, Japan
| | - Asahiro Morishita
- Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kida, Kagawa 761‑0793, Japan
| | - Takako Nomura
- Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kida, Kagawa 761‑0793, Japan
| | - Joji Tani
- Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kida, Kagawa 761‑0793, Japan
| | - Kei Takuma
- Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kida, Kagawa 761‑0793, Japan
| | - Tomoko Tadokoro
- Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kida, Kagawa 761‑0793, Japan
| | - Takashi Himoto
- Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kida, Kagawa 761‑0793, Japan
| | - Kyoko Oura
- Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kida, Kagawa 761‑0793, Japan
| | - Kunihiko Tsutsui
- Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kida, Kagawa 761‑0793, Japan
| | - Hideki Kobara
- Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kida, Kagawa 761‑0793, Japan
| | - Tsutomu Masaki
- Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, Kida, Kagawa 761‑0793, Japan
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Cho J, Lee HJ, Hwang SJ, Min HY, Kang HN, Park AY, Hyun SY, Sim JY, Lee HJ, Jang HJ, Suh YA, Hong S, Shin YK, Kim HR, Lee HY. The Interplay between Slow-Cycling, Chemoresistant Cancer Cells and Fibroblasts Creates a Proinflammatory Niche for Tumor Progression. Cancer Res 2020; 80:2257-2272. [PMID: 32193288 DOI: 10.1158/0008-5472.can-19-0631] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 08/05/2019] [Accepted: 03/16/2020] [Indexed: 11/16/2022]
Abstract
Quiescent cancer cells are believed to cause cancer progression after chemotherapy through unknown mechanisms. We show here that human non-small cell lung cancer (NSCLC) cell line-derived, quiescent-like, slow-cycling cancer cells (SCC) and residual patient-derived xenograft (PDX) tumors after chemotherapy experience activating transcription factor 6 (ATF6)-mediated upregulation of various cytokines, which acts in a paracrine manner to recruit fibroblasts. Cancer-associated fibroblasts (CAF) underwent transcriptional upregulation of COX2 and type I collagen (Col-I), which subsequently triggered a slow-to-active cycling switch in SCC through prostaglandin E2 (PGE2)- and integrin/Src-mediated signaling pathways, leading to cancer progression. Both antagonism of ATF6 and cotargeting of Src/COX2 effectively suppressed cytokine production and slow-to-active cell cycling transition in SCC, withholding cancer progression. Expression of COX2 and Col-I and activation of Src were observed in patients with NSCLC who progressed while receiving chemotherapy. Public data analysis revealed significant association between COL1A1 and SRC expression and NSCLC relapse. Overall, these findings indicate that a proinflammatory niche created by the interplay between SCC and CAF triggers tumor progression. SIGNIFICANCE: Cotargeting COX2 and Src may be an effective strategy to prevent cancer progression after chemotherapy.
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Affiliation(s)
- Jaebeom Cho
- Creative Research Initiative Center for Concurrent Control of Emphysema and Lung Cancer, College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Hyo-Jong Lee
- College of Pharmacy, Inje University, Gimhae, Gyungnam, Republic of Korea
| | - Su Jung Hwang
- College of Pharmacy, Inje University, Gimhae, Gyungnam, Republic of Korea
| | - Hye-Young Min
- Creative Research Initiative Center for Concurrent Control of Emphysema and Lung Cancer, College of Pharmacy, Seoul National University, Seoul, Republic of Korea.,College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, Republic of Korea
| | - Han Na Kang
- JE-UK Institute for Cancer Research, JEUK Co. Ltd., Gumi-City, Kyungbuk, Republic of Korea
| | - A-Young Park
- JE-UK Institute for Cancer Research, JEUK Co. Ltd., Gumi-City, Kyungbuk, Republic of Korea
| | - Seung Yeob Hyun
- Creative Research Initiative Center for Concurrent Control of Emphysema and Lung Cancer, College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Jeong Yeon Sim
- Creative Research Initiative Center for Concurrent Control of Emphysema and Lung Cancer, College of Pharmacy, Seoul National University, Seoul, Republic of Korea.,Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology and College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Ho Jin Lee
- Creative Research Initiative Center for Concurrent Control of Emphysema and Lung Cancer, College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Hyun-Ji Jang
- Creative Research Initiative Center for Concurrent Control of Emphysema and Lung Cancer, College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Young-Ah Suh
- Institute for Innovative Cancer Research, Asan Institute for Life Science, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Sungyoul Hong
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, Republic of Korea
| | - Young Kee Shin
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, Republic of Korea.,Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology and College of Pharmacy, Seoul National University, Seoul, Republic of Korea
| | - Hye Ryun Kim
- Yonsei Cancer Center, Division of Medical Oncology, Yonsei University College of Medicine, Seoul, Republic of Korea.
| | - Ho-Young Lee
- Creative Research Initiative Center for Concurrent Control of Emphysema and Lung Cancer, College of Pharmacy, Seoul National University, Seoul, Republic of Korea. .,College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, Republic of Korea
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7
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Li L, Lv Y, Yan D. Inhibition of Ep3 attenuates migration and promotes apoptosis of non-small cell lung cancer cells via suppression of TGF-β/Smad signaling. Oncol Lett 2018; 16:5645-5654. [PMID: 30344720 PMCID: PMC6176252 DOI: 10.3892/ol.2018.9391] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 06/19/2018] [Indexed: 01/05/2023] Open
Abstract
Non-small cell lung cancer (NSCLC) is the most common cause of cancer-associated mortality worldwide. Prostaglandin E2 (PGE2) regulates various biological processes, including invasion, proliferation and apoptosis. E-prostanoid 3 (Ep3) is a PGE2 receptor, and the functional role of Ep3 in the progression of NSCLC remains unresolved. The present study investigated the effects of Ep3 in A549 cells and explored the underlying molecular mechanisms. The results revealed that the mRNA and protein expression levels of Ep3 were significantly upregulated in NSCLC tissues and A549 cells. Pharmacological inhibition of Ep3 or RNA interference against Ep3 attenuated the cell viability, migration and invasion, and promoted apoptosis in A549 cells. Ep3 deficiency also decreased the expression of transforming growth factor (TGF)-β, phosphorylated (p)-Smad2 and p-Smad3. The transfection of TGF-β overexpression plasmids reversed the effects of Ep3 deficiency on the cell viability and apoptosis in A549 cells. Finally, an in vivo experiment revealed that Ep3-siRNA transfection strongly reduced the tumor growth and tumor volume. The Ep3-siRNA transfection also inhibited tumor metastasis via suppression of the expression of metastasis-associated proteins. Taken together, these findings indicate that inhibition of Ep3 attenuates the viability and migration, and promotes the apoptosis of NSCLC through suppression of the TGF-β/Smad signaling pathway. Targeting of the Ep3/TGF-β/Smad signaling pathway may be a novel therapeutic strategy for the prevention and treatment of NSCLC.
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Affiliation(s)
- Lei Li
- Department of Respiration, Zhoukou Central Hospital, Zhoukou, Henan 466000, P.R. China
| | - Yanping Lv
- Department of Respiration, Zhoukou Central Hospital, Zhoukou, Henan 466000, P.R. China
| | - Dengfeng Yan
- Department of Respiration, Zhoukou Central Hospital, Zhoukou, Henan 466000, P.R. China
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Ødegård J, Sondresen JE, Aasrum M, Tveteraas IH, Guren TK, Christoffersen T, Thoresen GH. Differential effects of epidermal growth factor (EGF) receptor ligands on receptor binding, downstream signalling pathways and DNA synthesis in hepatocytes. Growth Factors 2017; 35:239-248. [PMID: 29582692 DOI: 10.1080/08977194.2018.1453506] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Hepatocytes are responsive to mitogenic effects of several ligands acting via EGFR. Studying primary cultures of rat hepatocytes, we found that, as compared to EGF, HB-EGF had a markedly higher affinity of the EGFR, while AR and TGFα had lower affinity. HB-EGF was also more potent compared to the other growth factors regarding phosphorylation of EGFR, Shc, ERK1/2 and Akt. All ligands induced phosphorylation of ErbB2, indicating receptor heterodimerization. TGFα, despite having much lower receptor affinity, was about equally potent and efficacious as HB-EGF as a stimulator of DNA synthesis. In contrast, EGF had relatively high affinity but markedly lower efficacy in stimulation of DNA synthesis. The results suggest that amplifying and/or inhibitory mechanisms may modulate the mitogenic responses downstream of the initial signalling steps, and that this may affect the effects of the EGFR ligands differentially.
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Affiliation(s)
- J Ødegård
- a Department of Pharmacology , Institute of Clinical Medicine, University of Oslo , Oslo , Norway
| | - J E Sondresen
- a Department of Pharmacology , Institute of Clinical Medicine, University of Oslo , Oslo , Norway
| | - M Aasrum
- a Department of Pharmacology , Institute of Clinical Medicine, University of Oslo , Oslo , Norway
| | - I H Tveteraas
- a Department of Pharmacology , Institute of Clinical Medicine, University of Oslo , Oslo , Norway
- b Department of Pharmacology , Oslo University Hospital , Oslo , Norway
| | - T K Guren
- c Department of Oncology , Oslo University Hospital , Oslo , Norway
| | - T Christoffersen
- a Department of Pharmacology , Institute of Clinical Medicine, University of Oslo , Oslo , Norway
| | - G H Thoresen
- a Department of Pharmacology , Institute of Clinical Medicine, University of Oslo , Oslo , Norway
- d Department of Pharmaceutical Biosciences, School of Pharmacy , University of Oslo , Oslo , Norway
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Fang YH, Hsu CC, Hsieh MJ, Hung MS, Tsai YH, Lin YC. Impact of hypertrophic pulmonary osteoarthropathy on patients with lung cancer. Onco Targets Ther 2017; 10:5173-5177. [PMID: 29123415 PMCID: PMC5661835 DOI: 10.2147/ott.s139558] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Purpose Hypertrophic pulmonary osteoarthropathy (HPOA) is a rare disease that most commonly occurs secondary to lung cancer. However, the clinical significance of HPOA remains unclear. The aim of this study was to evaluate the impact of HPOA on patients with lung cancer in Taiwan. Patients and methods Data regarding lung cancer patients who demonstrated findings of HPOA on bone scintigraphy between 2010 and 2016 were retrospectively analyzed. Pathological confirmation of cases was conducted at Chiayi and Kaohsiung Chang Gang Memorial Hospital. Clinical characteristics, including gender, smoking status, histology subtype, clinical stage, and epidermal growth factor receptor (EGFR) status were investigated. Results We identified 69 lung cancer patients with typical HPOA findings on bone scintigraphy. Among them, 56 were male (81.2%) and 51 were ex-smokers or current smokers (73.9%). Adenocarcinoma was the most common histology subtype (n=42, 60.9%). Of 34 patients subjected to EGFR mutation analysis, only 4 (11.8%) had EGFR-tyrosine kinase inhibitor (EGFR-TKI)-sensitive mutations. Conclusion Male, smoking, and adenocarcinoma were the most common clinical characteristics of lung cancer patients with HPOA in our cohort. However, the proportion of EGFR-TKI-sensitive mutation cases was extremely low.
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Affiliation(s)
- Yu-Hung Fang
- Department of Pulmonary and Critical Care Medicine, Division of Thoracic Oncology, Chang Gung Memorial Hospital, Puzi
| | - Chien-Chin Hsu
- Department of Nuclear Medicine, Chang Gung Memorial Hospital, Kaohsiung Branch, Kaohsiung
| | - Meng-Jer Hsieh
- Department of Respiratory Therapy, College of Medicine, Chang Gung University, Guishan.,Department of Pulmonary and Critical Care Medicine, Division of Pulmonary Infection and Critical Care Medicine, Chang Gung Memorial Hospital
| | - Ming-Szu Hung
- Department of Pulmonary and Critical Care Medicine, Division of Thoracic Oncology, Chang Gung Memorial Hospital, Puzi.,Department of Respiratory Care, Chang Gung University of Science and Technology, Puzi.,Department of Medicine, College of Medicine, Chang Gung University, Guishan, Taiwan, Republic of China
| | - Ying-Huang Tsai
- Department of Pulmonary and Critical Care Medicine, Division of Thoracic Oncology, Chang Gung Memorial Hospital, Puzi.,Department of Respiratory Therapy, College of Medicine, Chang Gung University, Guishan
| | - Yu-Ching Lin
- Department of Pulmonary and Critical Care Medicine, Division of Thoracic Oncology, Chang Gung Memorial Hospital, Puzi.,Department of Pulmonary and Critical Care Medicine, Division of Pulmonary Infection and Critical Care Medicine, Chang Gung Memorial Hospital.,Department of Respiratory Care, Chang Gung University of Science and Technology, Puzi.,Department of Medicine, College of Medicine, Chang Gung University, Guishan, Taiwan, Republic of China
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Yao L, Chen W, Han C, Wu T. Microsomal prostaglandin E synthase-1 protects against Fas-induced liver injury. Am J Physiol Gastrointest Liver Physiol 2016; 310:G1071-80. [PMID: 27102561 PMCID: PMC4935489 DOI: 10.1152/ajpgi.00327.2015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 04/17/2016] [Indexed: 01/31/2023]
Abstract
Microsomal prostaglandin E synthase-1 (mPGES-1) is the terminal enzyme for the synthesis of prostaglandin E2 (PGE2), a proproliferative and antiapoptotic lipid molecule important for tissue regeneration and injury repair. In this study, we developed transgenic (Tg) mice with targeted expression of mPGES-1 in the liver to assess Fas-induced hepatocyte apoptosis and acute liver injury. Compared with wild-type (WT) mice, the mPGES-1 Tg mice showed less liver hemorrhage, lower serum alanine transaminase (ALT) and aspartate transaminase (AST) levels, less hepatic necrosis/apoptosis, and lower level of caspase cascade activation after intraperitoneal injection of the anti-Fas antibody Jo2. Western blotting analysis revealed increased expression and activation of the serine/threonine kinase Akt and associated antiapoptotic molecules in the liver tissues of Jo2-treated mPGES-1 Tg mice. Pretreatment with the mPGES-1 inhibitor (MF63) or the Akt inhibitor (Akt inhibitor V) restored the susceptibility of the mPGES-1 Tg mice to Fas-induced liver injury. Our findings provide novel evidence that mPGES-1 prevents Fas-induced liver injury through activation of Akt and related signaling and suggest that induction of mPGES-1 or treatment with PGE2 may represent important therapeutic strategy for the prevention and treatment of Fas-associated liver injuries.
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Affiliation(s)
| | | | | | - Tong Wu
- Department of Pathology and Laboratory Medicine, Tulane University School of Medicine, New Orleans, Louisiana
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Sun L, Wei X, Liu X, Zhou D, Hu F, Zeng Y, Sun Y, Luo S, Zhang Y, Yi XP. Expression of prostaglandin E2 and EP receptors in human papillary thyroid carcinoma. Tumour Biol 2015; 37:4689-97. [PMID: 26511970 DOI: 10.1007/s13277-015-4316-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Accepted: 10/22/2015] [Indexed: 01/15/2023] Open
Abstract
The objective of the present study is to determine the role of prostaglandin E2 (PGE2) and downstream EP receptors in the development of human papillary thyroid carcinoma (PTC). A total of 90 thyroid specimens excised from patients undergoing total or subtotal thyroidectomy in the Department of General Surgery, the Fifth Affiliated Hospital of Sun Yat-sen University, China, from August 2013 to September 2014, were analyzed. The quantitative reverse transcription-polymerase chain reaction (qRT-PCR) and immunohistochemical analyses were employed to examine the messenger RNA (mRNA) and protein expression, respectively. The expressions and significances of cyclooxygenase-2 (COX-2), microsomal prostaglandin E synthase-1 (mPGES-1), PGE2, and EP receptors in PTC and nodular goiter were investigated. The COX-2 mRNA and protein expression level significantly increased in the PTC tissues than in the paired noncarcinoma tissues adjacent to the PTC or nodular goiter tissues. The mPGES-1 protein expression was also significantly upregulated in the PTC tissues. All the four subtypes of EP receptors (EP1-4) could express in the thyroid tissues, while only the EP4 mRNA and protein levels significantly increased in the PTC tissues. The local production of PGE2 had a higher-level expression in the PTC tissues than in the noncarcinoma thyroid tissues adjacent to the PTC lesion and the benign nodular goiter tissues. The induction of PGE2 biosynthesis as well as the overexpression of EP4 in PTC suggested that this pathway might play an important role in the carcinogenesis and progression of PTC. These observations raise the possibility that pharmacological inhibition of mPGES-1 and/or EP4 may hold therapeutic promise in this common cancer.
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Affiliation(s)
- Liao Sun
- Department of Endocrinology & Metabolism, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, 519000, Guangdong, China.
| | - Xiaohong Wei
- Department of Endocrinology & Metabolism, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, 519000, Guangdong, China
| | - Xueting Liu
- Department of Endocrinology & Metabolism, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, 519000, Guangdong, China
| | - Danli Zhou
- Department of Endocrinology & Metabolism, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, 519000, Guangdong, China
| | - Fang Hu
- Department of Endocrinology & Metabolism, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, 519000, Guangdong, China
| | - Yingjuan Zeng
- Department of Endocrinology & Metabolism, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, 519000, Guangdong, China
| | - Ying Sun
- Department of Endocrinology & Metabolism, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, 519000, Guangdong, China
| | - Shunkui Luo
- Department of Endocrinology & Metabolism, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, 519000, Guangdong, China
| | - Yu Zhang
- Department of Endocrinology & Metabolism, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, 519000, Guangdong, China
| | - Xian Ping Yi
- Department of Pathology, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, 519000, Guangdong, China
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Tveteraas IH, Aasrum M, Brusevold IJ, Ødegård J, Christoffersen T, Sandnes D. Lysophosphatidic acid induces both EGFR-dependent and EGFR-independent effects on DNA synthesis and migration in pancreatic and colorectal carcinoma cells. Tumour Biol 2015; 37:2519-26. [DOI: 10.1007/s13277-015-4010-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 08/27/2015] [Indexed: 12/19/2022] Open
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13
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Kacprzak D, Pawliczak R. Does aspirin-induced oxidative stress cause asthma exacerbation? Arch Med Sci 2015; 11:494-504. [PMID: 26170841 PMCID: PMC4495142 DOI: 10.5114/aoms.2014.41960] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Revised: 05/15/2013] [Accepted: 07/10/2013] [Indexed: 12/13/2022] Open
Abstract
Aspirin-induced asthma (AIA) is a distinct clinical syndrome characterized by severe asthma exacerbations after ingestion of aspirin or other non-steroidal anti-inflammatory drugs. The exact pathomechanism of AIA remains unknown, though ongoing research has shed some light. Recently, more and more attention has been focused on the role of aspirin in the induction of oxidative stress, especially in cancer cell systems. However, it has not excluded the similar action of aspirin in other inflammatory disorders such as asthma. Moreover, increased levels of 8-isoprostanes, reliable biomarkers of oxidative stress in expired breath condensate in steroid-naïve patients with AIA compared to AIA patients treated with steroids and healthy volunteers, has been observed. This review is an attempt to cover aspirin-induced oxidative stress action in AIA and to suggest a possible related pathomechanism.
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Affiliation(s)
- Dorota Kacprzak
- Department of Immunopathology, Division of Allergology, Immunology and Dermatology, Medical University of Lodz, Lodz, Poland
| | - Rafał Pawliczak
- Department of Immunopathology, Division of Allergology, Immunology and Dermatology, Medical University of Lodz, Lodz, Poland
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Polavarapu S, Mani AM, Gundala NKV, Hari AD, Bathina S, Das UN. Effect of polyunsaturated fatty acids and their metabolites on bleomycin-induced cytotoxic action on human neuroblastoma cells in vitro. PLoS One 2014; 9:e114766. [PMID: 25536345 PMCID: PMC4275295 DOI: 10.1371/journal.pone.0114766] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 11/13/2014] [Indexed: 12/20/2022] Open
Abstract
In the present study, we noted that bleomycin induced growth inhibitory action was augmented by all the polyunsaturated fatty acids (PUFAs) tested on human neuroblastoma IMR-32 (0.5 × 10(4) cells/100 µl of IMR) cells (EPA > DHA > ALA = GLA = AA > DGLA = LA: ∼ 60, 40, 30, 10-20% respectively) at the maximum doses used. Of all the prostaglandins (PGE1, PGE2, PGF2α, and PGI2) and leukotrienes (LTD4 and LTE4) tested; PGE1, PGE2 and LTD4 inhibited the growth of IMR-32 cells to a significant degree at the highest doses used. Lipoxin A4 (LXA4), 19,20-dihydroxydocosapentaenoate (19, 20 DiHDPA) and 10(S),17(S)-dihydroxy-4Z,7Z,11E,13Z,15E,19Z-docosahexaenoic acid (protectin: 10(S),17(S)DiHDoHE), metabolites of DHA, significantly inhibited the growth of IMR-32 cells. Pre-treatment with AA, GLA, DGLA and EPA and simultaneous treatment with all PUFAs used in the study augmented growth inhibitory action of bleomycin. Surprisingly, both indomethacin and nordihydroguaiaretic acid (NDGA) at 60 and 20 µg/ml respectively enhanced the growth of IMR-32 cells even in the presence of bleomycin. AA enhanced oxidant stress in IMR-32 cells as evidenced by an increase in lipid peroxides, superoxide dismutase levels and glutathione peroxidase activity. These results suggest that PUFAs suppress growth of human neuroblastoma cells, augment growth inhibitory action of bleomycin by enhancing formation of lipid peroxides and altering the status of anti-oxidants and, in all probability, increase the formation of lipoxins, resolvins and protectins from their respective precursors that possess growth inhibitory actions.
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Affiliation(s)
- Sailaja Polavarapu
- Bio-Science Research Centre, Gayatri Vidya Parishad College of Engineering Campus, Madhurawada, Visakhapatnam-530048, Andhra Pradesh, India
| | - Arul M Mani
- Bio-Science Research Centre, Gayatri Vidya Parishad College of Engineering Campus, Madhurawada, Visakhapatnam-530048, Andhra Pradesh, India
| | - Naveen K V Gundala
- Bio-Science Research Centre, Gayatri Vidya Parishad College of Engineering Campus, Madhurawada, Visakhapatnam-530048, Andhra Pradesh, India
| | - Anasuya D Hari
- Bio-Science Research Centre, Gayatri Vidya Parishad College of Engineering Campus, Madhurawada, Visakhapatnam-530048, Andhra Pradesh, India
| | - Siresha Bathina
- Bio-Science Research Centre, Gayatri Vidya Parishad College of Engineering Campus, Madhurawada, Visakhapatnam-530048, Andhra Pradesh, India
| | - Undurti N Das
- UND Life Sciences, 2020 S 360th St, # K-202, Federal Way, Washington, 98003, United States of America
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Cantley JL, Vatner DF, Galbo T, Madiraju A, Petersen M, Perry RJ, Kumashiro N, Guebre-Egziabher F, Gattu AK, Stacy MR, Dione DP, Sinusas AJ, Ragolia L, Hall CE, Manchem VP, Bhanot S, Bogan JS, Samuel VT. Targeting steroid receptor coactivator 1 with antisense oligonucleotides increases insulin-stimulated skeletal muscle glucose uptake in chow-fed and high-fat-fed male rats. Am J Physiol Endocrinol Metab 2014; 307:E773-83. [PMID: 25159329 PMCID: PMC4216948 DOI: 10.1152/ajpendo.00148.2014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The steroid receptor coactivator 1 (SRC1) regulates key metabolic pathways, including glucose homeostasis. SRC1(-/-) mice have decreased hepatic expression of gluconeogenic enzymes and a reduction in the rate of endogenous glucose production (EGP). We sought to determine whether decreasing hepatic and adipose SRC1 expression in normal adult rats would alter glucose homeostasis and insulin action. Regular chow-fed and high-fat-fed male Sprage-Dawley rats were treated with an antisense oligonucleotide (ASO) against SRC1 or a control ASO for 4 wk, followed by metabolic assessments. SRC1 ASO did not alter basal EGP or expression of gluconeogenic enzymes. Instead, SRC1 ASO increased insulin-stimulated whole body glucose disposal by ~30%, which was attributable largely to an increase in insulin-stimulated muscle glucose uptake. This was associated with an approximately sevenfold increase in adipose expression of lipocalin-type prostaglandin D2 synthase, a previously reported regulator of insulin sensitivity, and an approximately 70% increase in plasma PGD2 concentration. Muscle insulin signaling, AMPK activation, and tissue perfusion were unchanged. Although GLUT4 content was unchanged, SRC1 ASO increased the cleavage of tether-containing UBX domain for GLUT4, a regulator of GLUT4 translocation. These studies point to a novel role of adipose SRC1 as a regulator of insulin-stimulated muscle glucose uptake.
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Affiliation(s)
- Jennifer L Cantley
- Howard Hughes Medical Institute and Departments of Internal Medicine and
| | | | | | | | | | | | - Naoki Kumashiro
- Howard Hughes Medical Institute and Departments of Internal Medicine and
| | | | - Arijeet K Gattu
- Departments of Internal Medicine and West Haven Veterans Affairs Medical Center, West Haven, Connecticut
| | | | | | | | - Louis Ragolia
- Vascular Biology Institute, Winthrop-University Hospital, Mineola, New York
| | - Christopher E Hall
- Vascular Biology Institute, Winthrop-University Hospital, Mineola, New York
| | | | | | - Jonathan S Bogan
- Departments of Internal Medicine and Cell Biology, Yale School of Medicine, New Haven, Connecticut
| | - Varman T Samuel
- Departments of Internal Medicine and West Haven Veterans Affairs Medical Center, West Haven, Connecticut;
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Bishayee A. The role of inflammation and liver cancer. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 816:401-35. [PMID: 24818732 DOI: 10.1007/978-3-0348-0837-8_16] [Citation(s) in RCA: 182] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Persistent inflammation is known to promote and exacerbate malignancy. Primary liver cancer, mostly hepatocellular carcinoma (HCC), is a clear example of inflammation-related cancer as more than 90 % of HCCs arise in the context of hepatic injury and inflammation. HCC represents the fifth most common malignancy and the third leading cause of cancer-related death worldwide with about one million new cases diagnosed every year with almost an equal number of deaths. Chronic unresolved inflammation is associated with persistent hepatic injury and concurrent regeneration, leading to sequential development of fibrosis, cirrhosis, and eventually HCC. Irrespective of the intrinsic differences among various etiological factors, a common denominator at the origin of HCC is the perpetuation of a wound-healing response activated by parenchymal cell death and the resulting inflammatory cascade. Hence, the identification of fundamental inflammatory signaling pathways causing transition from chronic liver injury to dysplasia and HCC could depict new predictive biomarkers and targets to identify and treat patients with chronic liver inflammation. This chapter critically discusses the roles of several major cytokines, chemokines, growth factors, transcription factors, and enzymes as well as a distinct network of inflammatory signaling pathways in the development and progression of HCC. It also highlights and analyzes preclinical animal studies showing innovative approaches of targeting inflammatory mediators and signaling by a variety of natural compounds and synthetic agents to achieve effective therapy as well as prevention of hepatic malignancy. Additionally, current limitations and potential challenges associated with the inhibition of inflammatory signaling as well as future directions of research to accelerate clinical development of anti-inflammatory agents to prevent and treat liver cancer are presented.
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Affiliation(s)
- Anupam Bishayee
- Department of Pharmaceutical Sciences, School of Pharmacy, American University of Health Sciences, 1600 East Hill Street, Signal Hill, CA, 90755, USA,
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17
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Brusevold IJ, Tveteraas IH, Aasrum M, Ødegård J, Sandnes DL, Christoffersen T. Role of LPAR3, PKC and EGFR in LPA-induced cell migration in oral squamous carcinoma cells. BMC Cancer 2014; 14:432. [PMID: 24928086 PMCID: PMC4065589 DOI: 10.1186/1471-2407-14-432] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Accepted: 06/03/2014] [Indexed: 11/10/2022] Open
Abstract
Background Oral squamous cell carcinoma is an aggressive neoplasm with serious morbidity and mortality, which typically spreads through local invasive growth. Lysophosphatidic acid (LPA) is involved in a number of biological processes, and may have a role in cancer cell migration and invasiveness. LPA is present in most tissues and can activate cells through six different LPA receptors (LPAR1-6). Although LPA is predominantly promigratory, some of the receptors may have antimigratory effects in certain cells. The signalling mechanisms of LPA are not fully understood, and in oral carcinoma cells the specific receptors and pathways involved in LPA-stimulated migration are unknown. Methods The oral carcinoma cell lines E10, SCC-9, and D2 were investigated. Cell migration was studied in a scratch wound assay, and invasion was demonstrated in organotypic three dimensional co-cultures. Protein and mRNA expression of LPA receptors was studied with Western blotting and qRT-PCR. Activation of signalling proteins was examined with Western blotting and isoelectric focusing, and signalling mechanisms were further explored using pharmacological agents and siRNA directed at specific receptors and pathways. Results LPA stimulated cell migration in the two oral carcinoma cell lines E10 and SCC-9, but was slightly inhibitory in D2. The receptor expression profile and the effects of specific pharmacological antagonist and agonists indicated that LPA-stimulated cell migration was mediated through LPAR3 in E10 and SCC-9. Furthermore, in both these cell lines, the stimulation by LPA was dependent on PKC activity. However, while LPA induced transactivation of EGFR and the stimulated migration was blocked by EGFR inhibitors in E10 cells, LPA did not induce EGFR transactivation in SCC-9 cells. In D2 cells, LPA induced EGFR transactivation, but this was associated with slowing of a very high inherent migration rate in these cells. Conclusion The results demonstrate LPA-stimulated migration in oral carcinoma cells through LPAR3, mediated further by PKC, which acts either in concert with or independently of EGFR transactivation.
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Affiliation(s)
- Ingvild J Brusevold
- Department of Pharmacology, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, and Oslo University Hospital, Blindern, P,O, Box 1057, Oslo N-0316, Norway.
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A role for cAMP-driven transactivation of EGFR in cancer aggressiveness - therapeutic implications. Med Hypotheses 2014; 83:142-7. [PMID: 24932579 DOI: 10.1016/j.mehy.2014.05.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 04/18/2014] [Accepted: 05/01/2014] [Indexed: 12/29/2022]
Abstract
In many common cancers, production of cAMP boosts cancer proliferation, survival, and aggressiveness, reflecting the fact that, through mechanisms that require further clarification, cAMP can promote tyrosine phosphorylation, notably transactivation of the epidermal growth factor receptor (EGFR). Hormones which activate adenylate cyclase in many cancers include PGE2 - often produced by cox-2 activity within tumors - and adrenergic hormones, acting on beta2 receptors. NSAID cyclooxygenase inhibitors, including low-dose aspirin, clearly reduce risk for many adenocarcinomas, but the impact of cox-2 inhibitors in clinical cancer therapy remains somewhat equivocal. There is increasing evidence that increased sympathetic drive, often reflecting psychic stress or tobacco usage, increases risk for, and promotes the aggressiveness of, many cancers. The non-specific beta antagonist propranolol shows cancer-retardant activity in pre-clinical rodent studies, especially in stressed animals, and a limited amount of epidemiology concludes that concurrent propranolol usage is associated with superior prognosis in breast cancer, ovarian cancer, and melanoma. Epidemiology correlating increased resting heart rate with increased total cancer mortality can be interpreted as compelling evidence that increased sympathetic drive encourages the onset and progression of common cancers. Conversely, hormones which inhibit adenylate cyclase activity in cancers may have potential for cancer control; GABA, which can be administered as a well-tolerated nutraceutical, has potential in this regard. Combination regimens intended to down-regulate cancer cAMP levels, perhaps used in conjunction with EGFR inhibitors, may have considerable potential for suppressing the contribution of cAMP/EGFR to cancer aggressiveness. This model also predicts that certain other hormones which activate adenylate cylase in various tissue may play a yet-unsuspected role in cancer induction and spread.
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Das UN. Lipoxins, resolvins, protectins, maresins and nitrolipids, and their clinical implications with specific reference to cancer: part I. ACTA ACUST UNITED AC 2013. [DOI: 10.2217/clp.13.31] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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20
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Sales KU, Giudice FS, Castilho RM, Salles FT, Squarize CH, Abrahao AC, Pinto DS. Cyclin D1-induced proliferation is independent of beta-catenin in head and neck cancer. Oral Dis 2013; 20:e42-8. [PMID: 23730900 DOI: 10.1111/odi.12124] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Revised: 04/04/2013] [Accepted: 04/18/2013] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Head and neck squamous cell carcinoma (HNSCC) progression and metastasis have previously been associated with the activation of phosphatidylinositol 3-kinase-protein kinase B (PI3K-Akt) and Wnt signalling pathways, which lead to the activation of pro-proliferative genes, such as cyclin D1. The current study aims to investigate whether there is a crosstalk between these pathways in HNSCC and which pathway is more likely to regulate cyclin D1. MATERIAL AND METHODS Two HNSCC and a control keratinocyte cell lines were treated with EGF and wortmannin to respectively activate and block the PI3K-Akt and Wnt pathways. Partial and total levels of cyclin D1, beta-catenin and Akt were evaluated by Western blotting and immunofluorescence. Twenty-four paraffin-embedded samples of human HNSCC, as well as normal oral mucosa biopsies, were also immunohistochemically evaluated for beta-catenin and cyclin D1 expression. RESULTS Following both treatments, change in cyclin D1 protein was correlated with Akt levels only. Cytoplasmic staining for beta-catenin and loss of its membranous expression in the HNSCC invasive areas were found in 92% of the HNSCC biopsies. CONCLUSION Taken together, we show that the change in cyclin D1 levels is more likely to be due to the EGFR-Akt pathway activation than due to beta-catenin nuclear translocation.
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Affiliation(s)
- K U Sales
- Department of Oral Pathology, University of São Paulo School of Dentistry, São Paulo, Brazil
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Mor A, Aizman E, Kloog Y. Celecoxib enhances the anti-inflammatory effects of farnesylthiosalicylic acid on T cells independent of prostaglandin E(2) production. Inflammation 2013; 35:1706-14. [PMID: 22688643 DOI: 10.1007/s10753-012-9488-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Celecoxib (Celebrex(®)), a non-steroidal anti-inflammatory drug and selective cyclooxygenase-2 inhibitor, is widely used to treat arthritis and other inflammatory disorders. Awareness of its anti-proliferative properties has prompted another indication for its use, in preventing colon polyps in high-risk populations. Farnesylthiosalicylic acid (FTS; Salirasib(®)), designed to inhibit oncogenic Ras and currently under evaluation in phase I/II and II clinical trials, was recently shown by our group to exert anti-inflammatory effects on both lymphocytes and mast cells. Here we examined whether celecoxib combined with FTS would enhance this anti-inflammatory activity. While each drug separately inhibited Ras activation in these cells, their combination yielded more marked inhibition as well as further inhibition of ERK phosphorylation, lymphocyte adhesion, and interleukin-2 secretion. The inhibitory effects, moreover, were independent of prostaglandin E(2) secretion. These data point to the promising potential of combined treatment with celecoxib and FTS for inflammatory disorders involving lymphocytes.
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Affiliation(s)
- Adam Mor
- Department of Medicine, Division of Rheumatology, New York University School of Medicine, 450 E 29th Street, New York, NY 10016, USA.
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22
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Lee YK, Park OJ. Soybean isoflavone genistein regulates apoptosis through NF-κB dependent and independent pathways. EXPERIMENTAL AND TOXICOLOGIC PATHOLOGY : OFFICIAL JOURNAL OF THE GESELLSCHAFT FUR TOXIKOLOGISCHE PATHOLOGIE 2013; 65:1-6. [PMID: 21724378 DOI: 10.1016/j.etp.2011.05.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2010] [Revised: 04/07/2011] [Accepted: 05/04/2011] [Indexed: 01/22/2023]
Abstract
Cyclooxygenase-2 (COX-2), the key enzyme of the conversion of arachidonic acid to prostaglandins is an important regulator of inflammation and perhaps apoptosis. Genistein is an active component of legumes and other related food associated with prevention of degenerative diseases possibly through modulating certain signaling pathways. It was investigated whether the induction of apoptosis with genistein was carried out via COX-2 suppression through the regulation of NF-κB. The cox-2 positive and negative cells were used to compare the effect of genistein on the modulation of NF-κB in COX-2 expressed or non-expressed genotypic systems. Suppression of COX-2 as well as decreasing NF-κB DNA binding activity was accompanied with the induction of apoptosis in genistein-treated COX-2 expressed cells. However, in cox-2 negative cells, apoptosis occurred without any involvement of NF-κB with genistein treatement. Genistein induced apoptosis through the generation of reactive oxygen species (ROS) both of cox-2 positive and negative cells. These results suggested that genistein is capable of exihibiting NF-κB-dependent and NF-κB-independent apoptotic control via ROS generation depending on genetic cell types.
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Affiliation(s)
- Yun-Kyoung Lee
- Department of Food and Nutrition, Hannam University Daedeok Valley Campus, 461-6 Jeonmin-dong, Yusung-gu, Daejeon 305-811, South Korea
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Tveteraas IH, Müller KM, Aasrum M, Ødegård J, Dajani O, Guren T, Sandnes D, Christoffersen T. Mechanisms involved in PGE2-induced transactivation of the epidermal growth factor receptor in MH1C1 hepatocarcinoma cells. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2012; 31:72. [PMID: 22967907 PMCID: PMC3542006 DOI: 10.1186/1756-9966-31-72] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Accepted: 09/01/2012] [Indexed: 12/31/2022]
Abstract
Background It is important to understand the mechanisms by which the cells integrate signals from different receptors. Several lines of evidence implicate epidermal growth factor (EGF) receptor (EGFR) in the pathophysiology of hepatocarcinomas. Data also suggest a role of prostaglandins in some of these tumours, through their receptors of the G protein-coupled receptor (GPCR) family. In this study we have investigated mechanisms of interaction between signalling from prostaglandin receptors and EGFR in hepatocarcinoma cells. Methods The rat hepatocarcinoma cell line MH1C1 and normal rat hepatocytes in primary culture were stimulated with EGF or prostaglandin E2 (PGE2) and in some experiments also PGF2α. DNA synthesis was determined by incorporation of radiolabelled thymidine into DNA, phosphorylation of proteins in signalling pathways was assessed by Western blotting, mRNA expression of prostaglandin receptors was determined using qRT-PCR, accumulation of inositol phosphates was measured by incorporation of radiolabelled inositol, and cAMP was determined by radioimmunoassay. Results In the MH1C1 hepatocarcinoma cells, stimulation with PGE2 or PGF2α caused phosphorylation of the EGFR, Akt, and ERK, which could be blocked by the EGFR tyrosine kinase inhibitor gefitinib. This did not occur in primary hepatocytes. qRT-PCR revealed expression of EP1, EP4, and FP receptor mRNA in MH1C1 cells. PGE2 stimulated accumulation of inositol phosphates but not cAMP in these cells, suggesting signalling via PLCβ. While pretreatment with EP1 and EP4 receptor antagonists did not inhibit the effect of PGE2, pretreatment with an FP receptor antagonist blocked the phosphorylation of EGFR, Akt and ERK. Further studies suggested that the PGE2-induced signal was mediated via Ca2+ release and not PKC activation, and that it proceeded through Src and shedding of membrane-bound EGFR ligand precursors by proteinases of the ADAM family. Conclusion The results indicate that in MH1C1 cells, unlike normal hepatocytes, PGE2 activates the MEK/ERK and PI3K/Akt pathways by transactivation of the EGFR, thus diversifying the GPCR-mediated signal. The data also suggest that the underlying mechanisms in these cells involve FP receptors, PLCβ, Ca2+, Src, and proteinase-mediated release of membrane-associated EGFR ligand(s).
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Affiliation(s)
- Ingun Heiene Tveteraas
- Department of Pharmacology, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, P,O,Box 1057 Blindern, N-0316 Oslo, Norway.
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Ødegård J, Aasrum M, Tveteraas IH, Bharath SP, Sandnes D, Christoffersen T. Role of ErbB2 in the prostaglandin E₂-induced enhancement of the mitogenic response to epidermal growth factor in cultured hepatocytes. Biochem Biophys Res Commun 2012; 421:255-60. [PMID: 22503980 DOI: 10.1016/j.bbrc.2012.03.148] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Accepted: 03/30/2012] [Indexed: 01/20/2023]
Abstract
Prostaglandin E(2) (PGE(2)) enhances the mitogenic response to epidermal growth factor (EGF) in hepatocytes, but the underlying mechanisms are not clear. We previously observed that PGE(2) upregulates EGF-induced signalling in the MEK/ERK and PI3K/Akt pathways in hepatocytes. Other investigations have indicated that ErbB2 enhances the mitogenic effect of EGF in these cells. In the present study we found that treatment with PGE(2) increased ErbB2 and decreased ErbB3 expression at both the mRNA and protein level in cultured rat hepatocytes. Silencing of the ErbB2 expression with specific siRNA blocked the stimulation by PGE(2) and EGF of cyclin D1 expression and DNA synthesis. Both EGF and PGE(2) increased the expression of ERK and Akt, but while the effect of EGF was inhibited by ErbB2-directed siRNA, this did not affect the PGE(2)-induced upregulation of ERK and Akt. These data suggest that PGE(2) can enhance the mitogenic effect of EGF both by increasing ErbB2 expression and by ErbB2-independent mechanisms.
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Affiliation(s)
- John Ødegård
- Department of Pharmacology, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo and Oslo University Hospital, Oslo, Norway.
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Xu Q, Nakayama M, Suzuki Y, Sakai K, Nakamura T, Sakai Y, Matsumoto K. Suppression of acute hepatic injury by a synthetic prostacyclin agonist through hepatocyte growth factor expression. Am J Physiol Gastrointest Liver Physiol 2012; 302:G420-9. [PMID: 22159278 DOI: 10.1152/ajpgi.00216.2011] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Previous studies have demonstrated that mice disrupted with the cyclooxygenase-2 gene showed much more severe liver damage compared with wild-type mice after liver injury, and prostaglandins (PGs) such as PGE(1/2) and PGI(2) have decreased hepatic injury, but the mechanisms by which prostaglandins exhibit protective action on the liver have yet to be addressed. In the present study, we investigated the mechanism of the protective action of PGI(2) using the synthetic IP receptor agonist ONO-1301. In primary cultures of hepatocytes and nonparenchymal liver cells, ONO-1301 did not show protective action directly on hepatocytes, whereas it stimulated expression of hepatocyte growth factor (HGF) in nonparenchymal liver cells. In mice, peroral administration of ONO-1301 increased hepatic gene expression and protein levels of HGF. Injections of CCl4 induced acute liver injury in mice, but the onset of acute liver injury was strongly suppressed by administration of ONO-1301. The increases in serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST) by CCl4 were suppressed by 10 mg/kg ONO-1301 to 39.4 and 33.6%, respectively. When neutralizing antibody against HGF was administered with ONO-1301 and CCl4, the decreases by ONO-1301 in serum ALT and AST, apoptotic liver cells, and expansion of necrotic areas in liver tissue were strongly reversed by neutralization of endogenous HGF. These results indicate that ONO-1301 increases expression of HGF and that hepatoprotective action of ONO-1301 in CCl4-induced liver injury may be attributable to its activity to induce expression of HGF, at least in part. The potential for involvement of HGF-Met-mediated signaling in the hepatotrophic action of endogenous prostaglandins generated by injury-dependent cyclooxygenase-2 induction is considerable.
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Affiliation(s)
- Qing Xu
- Division of Tumor Dynamics and Regulation, Cancer Research Institute, Kanazawa Univ., Kakuma, Kanazawa, Japan
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Cytosolic phospholipase A(2)α protects against Fas- but not LPS-induced liver injury. J Hepatol 2011; 55:1281-90. [PMID: 21703211 PMCID: PMC3221788 DOI: 10.1016/j.jhep.2011.03.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2010] [Revised: 02/27/2011] [Accepted: 03/01/2011] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS Cytosolic phospholipase A(2)α (cPLA(2)α) is a rate-limiting key enzyme controlling the release of arachidonic acid (AA) substrate for the synthesis of prostaglandins and leukotrienes. This study was designed to explore the role of hepatocyte cPLA(2)α in Fas-mediated liver injury, in vivo. METHODS Transgenic mice with targeted expression of cPLA(2)α under control of the albumin-promoter enhancer and wild-type mice were injected intraperitoneally with anti-Fas antibody Jo2 or lipopolysaccharide plus d-galactosamine and monitored for liver injury and survival at various time points. RESULTS The cPLA(2)α Tg mice resist Fas-induced liver failure, as reflected by the lower serum transaminase levels, fewer apoptotic hepatocytes, reduced caspase activation, and reduced PARP cleavage when compared to the matched wild type mice. Inhibition of cPLA(2)α by its pharmacological inhibitor, pyrrolidine, enhanced Jo2-induced liver injury in both cPLA(2)α Tg and wild type mice. Hepatic overexpression of cPLA(2)α increases the expression of EGFR in the liver and the EGFR inhibitor, AG1478, exacerbated Jo2-mediated liver injury. The cPLA(2)α transgenic mice develop more prominent liver tissue damage than wild-type mice after LPS/d-galactosamine injection. CONCLUSIONS Hepatocyte cPLA(2)α protects against Fas-induced liver injury and this effect is mediated at least in part through the upregulation of EGFR.
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Pink RC, Bailey TA, Iputo JE, Sammon AM, Woodman AC, Carter DRF. Molecular basis for maize as a risk factor for esophageal cancer in a South African population via a prostaglandin E2 positive feedback mechanism. Nutr Cancer 2011; 63:714-21. [PMID: 21667399 DOI: 10.1080/01635581.2011.570893] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The incidence of squamous cancer of the esophagus varies up to a hundredfold in different regions of the world. In Transkei, South Africa, a particularly high incidence of the disease is observed. We have previously proposed an association between a maize-rich diet and elevated levels of intragastric prostaglandin E2 production (PGE(2)). Here we investigate the molecular mechanisms by which a high-maize diet could lead to increased incidence of squamous cancer of the esophagus. We confirm that levels of PGE(2) are high (606.8 pg/ml) in the gastric fluid of individuals from Transkei. We also show that treatment of esophageal cells with linoleic acid, which is found at high levels in maize and is a precursor to PGE(2), leads to increased cell proliferation. Similarly, treatment of cells with PGE(2) or with gastric fluid from Transkeians also leads to increased proliferation. Our data suggest that the high levels of PGE(2) associated with a maize-rich diet stimulate cell division and induce the enzyme COX 2, resulting in a positive feedback mechanism that predisposes the esophagus to carcinoma.
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Affiliation(s)
- Ryan C Pink
- Cranfield Health, Cranfield University, Cranfield, Bedfordshire, United Kingdom.
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Acetylsalicylic acid-induced oxidative stress, cell cycle arrest, apoptosis and mitochondrial dysfunction in human hepatoma HepG2 cells. Eur J Pharmacol 2011; 668:15-24. [PMID: 21722632 DOI: 10.1016/j.ejphar.2011.06.016] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Revised: 05/03/2011] [Accepted: 06/14/2011] [Indexed: 12/21/2022]
Abstract
It is widely accepted that non-steroidal anti-inflammatory drugs (NSAIDs), including aspirin, reduce the risk of cancer. The anti-cancer and anti-inflammatory effects of NSAIDs are associated with the inhibition of prostaglandin synthesis and cyclooxygenase-2 activity. Several other mechanisms which contribute to the anti-cancer effect of these drugs in different cancer models both in vivo and in vitro are also presumed to be involved. The precise molecular mechanism, however, is still not clear. We investigated, therefore, the effects of acetylsalicylic acid (ASA, aspirin) on multiple cellular and functional targets, including mitochondrial bioenergetics, using human hepatoma HepG2 cancer cells in culture. Our results demonstrate that ASA induced G0/G1 cell cycle arrest and apoptosis in HepG2 cells. ASA increased the production of reactive oxygen species, reduced the cellular glutathione (GSH) pool and inhibited the activities of the mitochondrial respiratory enzyme complexes, NADH-ubiquinone oxidoreductase (complex I), cytochrome c oxidase (complex IV) and the mitochondrial matrix enzyme, aconitase. Apoptosis was triggered by alteration in mitochondrial permeability transition, inhibition of ATP synthesis, decreased expression of the anti-apoptotic protein Bcl-2, release of cytochrome c and activation of pro-apoptotic caspase-3 and the DNA repairing enzyme, poly (-ADP-ribose) polymerase (PARP). These findings strongly suggest that ASA-induced toxicity in human hepatoma HepG2 cells is mediated by increased metabolic and oxidative stress, accompanied by mitochondrial dysfunction which result in apoptosis.
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Yun SP, Ryu JM, Jang MW, Han HJ. Interaction of profilin-1 and F-actin via a β-arrestin-1/JNK signaling pathway involved in prostaglandin E(2)-induced human mesenchymal stem cells migration and proliferation. J Cell Physiol 2011; 226:559-71. [PMID: 20717968 DOI: 10.1002/jcp.22366] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Although many previous reports have examined the function of prostaglandin E(2) (PGE(2)) in the migration and proliferation of various cell types, the role of the actin cytoskeleton in human mesenchymal stem cells (hMSCs) migration and proliferation has not been reported. The present study examined the involvement of profilin-1 (Pfn-1) and filamentous-actin (F-actin) in PGE(2)-induced hMSC migration and proliferation and its related signal pathways. PGE(2) (10(-6) M) increased both cell migration and proliferation, and also increased E-type prostaglandin receptor 2 (EP2) mRNA expression, β-arrestin-1 phosphorylation, and c-Jun N-terminal kinase (JNK) phosphorylation. Small interfering RNA (siRNA)-mediated knockdown of β-arrestin-1 and JNK (-1, -2, -3) inhibited PGE(2)-induced growth of hMSCs. PGE(2) also activated Pfn-1, which was blocked by JNK siRNA, and induced F-actin level and organization. Downregulation of Pfn-1 by siRNA decreased the level and organization of F-actin. In addition, specific siRNA for TRIO and F-actin-binding protein (TRIOBP) reduced the PGE(2)-induced increase in hMSC migration and proliferation. Together, these experimental data demonstrate that PGE(2) partially stimulates hMSCs migration and proliferation by interaction of Pfn-1 and F-actin via EP2 receptor-dependent β-arrestin-1/JNK signaling pathways.
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Affiliation(s)
- Seung Pil Yun
- Department of Veterinary Physiology, College of Veterinary Medicine, Biotherapy Human Resources Center (BK21), Chonnam National University, Gwangju, Korea
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Chun KS, Lao HC, Langenbach R. The prostaglandin E2 receptor, EP2, stimulates keratinocyte proliferation in mouse skin by G protein-dependent and {beta}-arrestin1-dependent signaling pathways. J Biol Chem 2010; 285:39672-81. [PMID: 20959465 DOI: 10.1074/jbc.m110.117689] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
The prostaglandin E(2) (PGE(2)) G protein-coupled receptor (GPCR), EP2, plays important roles in mouse skin tumor development (Chun, K. S., Lao, H. C., Trempus, C. S., Okada, M., and Langenbach, R. (2009) Carcinogenesis 30, 1620-1627). Because keratinocyte proliferation is essential for skin tumor development, EP2-mediated signaling pathways that contribute to keratinocyte proliferation were investigated. A single topical application of the EP2 agonist, butaprost, dose-dependently increased keratinocyte replication via activation of epidermal growth factor receptor (EGFR) and PKA signaling. Because GPCR-mediated activation of EGFR can involve the formation of a GPCR-β-arrestin-Src signaling complex, the possibility of a β-arrestin1-Src complex contributing to EP2-mediated signaling in keratinocytes was investigated. Butaprost induced β-arrestin1-Src complex formation and increased both Src and EGFR activation. A role for β-arrestin1 in EP2-mediated Src and EGFR activation was demonstrated by the observation that β-arrestin1 deficiency significantly reduced Src and EGFR activation. In agreement with a β-arrestin1-Src complex contributing to EGFR activation, Src and EGFR inhibition (PP2 and AG1478, respectively) indicated that Src was upstream of EGFR. Butaprost also induced the activation of Akt, ERK1/2, and STAT3, and both β-arrestin1 deficiency and EGFR inhibition (AG1478 or gefitinib) decreased their activation. In addition to β-arrestin1-dependent EGFR activation, butaprost increased PKA activation, as measured by phospho-GSK3β (p-GSK3β) and p-cAMP-response element-binding protein formation. PKA inhibition (H89 or R(P)-adenosine-3',5'-cyclic monophosphorothioate (R(P)-cAMPS)) decreased butaprost-induced cAMP-response element-binding protein and ERK activation but did not affect EGFR activation, whereas β-arrestin1 deficiency decreased EGFR activation but did not affect butaprost-induced PKA activation, thus indicating that they were independent EP2-mediated pathways. Therefore, the results indicate that EP2 contributed to mouse keratinocyte proliferation by G protein-independent, β-arrestin1-dependent activation of EGFR and G protein-dependent activation of PKA.
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Affiliation(s)
- Kyung-Soo Chun
- Laboratory of Toxicology and Pharmacology, NIEHS, National Institutes of Health, Research Triangle Park, North Carolina 27709, USA
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Cyclooxygenase-2 in tumorigenesis of gastrointestinal cancers: an update on the molecular mechanisms. Cancer Lett 2010; 295:7-16. [PMID: 20381235 DOI: 10.1016/j.canlet.2010.03.015] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2010] [Revised: 03/18/2010] [Accepted: 03/22/2010] [Indexed: 12/20/2022]
Abstract
The use of nonsteroidal anti-inflammatory drugs (NSAIDs) is associated with lower risks for esophageal, gastric and colon cancers as well as other solid tumors. The antitumor effect of NSAIDs is mediated through cyclooxygenase-2 (COX-2)-dependent and -independent regulation of oncogenic and tumor-suppressive pathways. Recent discoveries have shed new light on the regulation of COX-2 at the molecular level in these cancers. Moreover, prostaglandin E(2) (PGE(2)), a COX-2-derived eicosanoid, has been found to affect numerous tumorigenic processes. In this connection, PGE(2) activates multiple intracellular signaling pathways, including (1) transactivation of epidermal growth factor receptor (EGFR); (2) protein kinase C-dependent, EGFR-independent activation of extracellular signal-regulated kinase (ERK) and the transcription factors activator protein-1 and c-Myc; (3) G-protein-mediated activation of beta-catenin/TCF-dependent transcription. Activation of these signaling pathways by PGE(2) is mediated by EP receptors whose inhibitors suppress gastrointestinal carcinogenesis. Taken together, COX-2 expression is dysregulated in many types of cancer and COX-2-derived PGE(2) elicits multiple oncogenic signals to promote carcinogenesis. Targeting PGE(2) signaling by EP receptor antagonists holds promise for the development of targeted therapy for the treatment of cancer.
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Park JH, Han HJ. Caveolin-1 plays important role in EGF-induced migration and proliferation of mouse embryonic stem cells: involvement of PI3K/Akt and ERK. Am J Physiol Cell Physiol 2009; 297:C935-44. [DOI: 10.1152/ajpcell.00121.2009] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The involvement of caveolin-1 in the regulation of embryonic stem (ES) cell growth by epidermal growth factor (EGF) is by no means clear cut. Thus we examined the relationship between EGF and caveolin-1 in mouse ES cell migration and proliferation. The results revealed that EGF increased Src, caveolin-1, focal adhesion kinase (FAK), Akt, and extracellular signal-regulated kinase-1/2 (ERK) phosphorylation levels. Especially, phosphorylation of caveolin-1 is attenuated by AG1478, herbimycin A (tyrosine kinase inhibitors), and pyrazolopyrimidine 2 (PP2, Src inhibitor) and EGF-induced ERK activation was blocked by PP2, methyl-β-cyclodextrin (MβCD), caveolin-1 small interfering RNA (siRNA), LY-294002 [phosphoinositol-3 kinase inhibitor (PI3K)], and Akt inhibitor. In addition, EGF promoted the cell migration, which was attenuated by PP2, caveolin-1 siRNA, FAK siRNA, LY-294002, Akt inhibitor, and PD-98059. EGF also increased matrix metalloproteinase (MMP-2) expression levels and EGF-induced MMP2 expression was inhibited by caveolin-1 siRNA, FAK siRNA, LY-294002, Akt inhibitor, and PD-98059. Furthermore, EGF-induced increase of cell cycle proteins expression level and [3H]thymidine incorporation was blocked by MMP inhibitor. EGF also significantly increases [3H]thymidine incorporation and cell number, which were significantly blocked by AG 1478, PP2, MβCD, caveolin-1 siRNA, FAK siRNA, LY-294002, and PD-98059 (ERK inhibitor). EGF-induced increase of protooncogenes (c- fos, c- myc, and c- Jun) and cell cycle regulatory proteins (cyclin D1, CDK4, cyclin E, and CDK2) expression levels were also attenuated by caveolin-1 siRNA and FAK siRNA. In conclusion, these results demonstrated that EGF-induced DNA synthesis and cell migration are mediated by caveolin-1, which is activated by Src, FAK, PI3K/Akt, ERK, and MMP-2 signals in mouse ES cells.
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Affiliation(s)
- Jae Hong Park
- Department of Veterinary Physiology, Biotherapy Human Resources Center (BK21), College of Veterinary Medicine, Chonnam National University, Gwangju, Korea
| | - Ho Jae Han
- Department of Veterinary Physiology, Biotherapy Human Resources Center (BK21), College of Veterinary Medicine, Chonnam National University, Gwangju, Korea
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Henkel J, Neuschäfer-Rube F, Pathe-Neuschäfer-Rube A, Püschel GP. Aggravation by prostaglandin E2 of interleukin-6-dependent insulin resistance in hepatocytes. Hepatology 2009; 50:781-90. [PMID: 19575453 DOI: 10.1002/hep.23064] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
UNLABELLED Hepatic insulin resistance is a major contributor to fasting hyperglycemia in patients with metabolic syndrome and type 2 diabetes. Circumstantial evidence suggests that cyclooxygenase products in addition to cytokines might contribute to insulin resistance. However, direct evidence for a role of prostaglandins in the development of hepatic insulin resistance is lacking. Therefore, the impact of prostaglandin E(2) (PGE(2)) alone and in combination with interleukin-6 (IL-6) on insulin signaling was studied in primary hepatocyte cultures. Rat hepatocytes were incubated with IL-6 and/or PGE(2) and subsequently with insulin. Glycogen synthesis was monitored by radiochemical analysis; the activation state of proteins of the insulin receptor signal chain was analyzed by western blot with phosphospecific antibodies. In hepatocytes, insulin-stimulated glycogen synthesis and insulin-dependent phosphorylation of Akt-kinase were attenuated synergistically by prior incubation with IL-6 and/or PGE(2) while insulin receptor autophosphorylation was barely affected. IL-6 but not PGE(2) induced suppressors of cytokine signaling (SOCS3). PGE(2) but not IL-6 activated extracellular signal-regulated kinase 1/2 (ERK1/2) persistently. Inhibition of ERK1/2 activation by PD98059 abolished the PGE(2)-dependent but not the IL-6-dependent attenuation of insulin signaling. In HepG2 cells expressing a recombinant EP3-receptor, PGE(2) pre-incubation activated ERK1/2, caused a serine phosphorylation of insulin receptor substrate 1 (IRS1), and reduced the insulin-dependent Akt-phosphorylation. CONCLUSION PGE(2) might contribute to hepatic insulin resistance via an EP3-receptor-dependent ERK1/2 activation resulting in a serine phosphorylation of insulin receptor substrate, thereby preventing an insulin-dependent activation of Akt and glycogen synthesis. Since different molecular mechanisms appear to be employed, PGE(2) may synergize with IL-6, which interrupted the insulin receptor signal chain, principally by an induction of SOCS, namely SOCS3.
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Affiliation(s)
- Janin Henkel
- From Universität Potsdam, Institut für Ernährungswissenschaft, Biochemie der Ernährung, Arthur-Scheunert-Allee 114-116, D-14558 Nuthetal, Germany
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Li G, Han C, Xu L, Lim K, Isse K, Wu T. Cyclooxygenase-2 prevents fas-induced liver injury through up-regulation of epidermal growth factor receptor. Hepatology 2009; 50:834-43. [PMID: 19585617 PMCID: PMC2758493 DOI: 10.1002/hep.23052] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
UNLABELLED Cyclooxygenase-2 (COX-2)-derived prostaglandins participate in a number of pathophysiological responses such as inflammation, carcinogenesis, and modulation of cell growth and survival. This study used complementary approaches of COX-2 transgenic (Tg) and knockout (KO) mouse models to evaluate the mechanism of COX-2 in Fas-induced hepatocyte apoptosis and liver failure in vivo. We generated Tg mice with targeted expression of COX-2 in the liver by using the albumin promoter-enhancer-driven vector. The COX-2 Tg, COX-2 KO, and wild-type mice were treated with the anti-Fas antibody Jo2 (0.5 microg/g of body weight) for 4 to 6 hours, and the extent of liver injury was assessed by histopathology, serum aminotransferases, TUNEL staining, and caspase activation. The COX-2 Tg mice showed resistance to Fas-induced liver injury in comparison with the wild-type mice; this was reflected by the lower alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels, less liver damage, and less hepatocyte apoptosis (P < 0.01). In contrast, the COX-2 KO mice showed significantly higher serum ALT and AST levels, more prominent hepatocyte apoptosis, and higher levels of caspase-8, caspase-9, and caspase-3 activity than the wild-type mice (P < 0.01). The COX-2 Tg livers expressed higher levels of epidermal growth factor receptor (EGFR) than the wild-type controls; the COX-2 KO livers expressed the lowest levels of EGFR. Pretreatment with a COX-2 inhibitor (NS-398) or an EGFR inhibitor (AG1478) exacerbated Jo2-mediated liver injury and hepatocyte apoptosis. CONCLUSION These findings demonstrate that COX-2 prevents Fas-induced hepatocyte apoptosis and liver failure at least in part through up-regulation of EGFR.
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Affiliation(s)
- Guiying Li
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213,Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, Jilin University, Changchun 130021, China
| | - Chang Han
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213
| | - Lihong Xu
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213
| | - Kyu Lim
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213,Department of Biochemistry, College of Medicine, Chungnam National University, Korea
| | - Kumiko Isse
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213
| | - Tong Wu
- Department of Pathology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213
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Duran J, Obach M, Navarro-Sabate A, Manzano A, Gómez M, Rosa JL, Ventura F, Perales JC, Bartrons R. Pfkfb3 is transcriptionally upregulated in diabetic mouse liver through proliferative signals. FEBS J 2009; 276:4555-68. [PMID: 19645723 DOI: 10.1111/j.1742-4658.2009.07161.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The ubiquitous isoform of 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase (uPFK-2), a product of the Pfkfb3 gene, plays a crucial role in the control of glycolytic flux. In this study, we demonstrate that Pfkfb3 gene expression is increased in streptozotocin-induced diabetic mouse liver. The Pfkfb3/-3566 promoter construct linked to the luciferase reporter gene was delivered to the liver via hydrodynamic gene transfer. This promoter was upregulated in streptozotocin-induced diabetic mouse liver compared with transfected healthy cohorts. In addition, increases were observed in Pfkfb3 mRNA and uPFK-2 protein levels, and intrahepatic fructose-2,6-bisphosphate concentration. During streptozotocin-induced diabetes, phosphorylation of both p38 mitogen-activated protein kinase and Akt was detected, together with the overexpression of the proliferative markers cyclin D and E2F. These findings indicate that uPFK-2 induction is coupled to enhanced hepatocyte proliferation in streptozotocin-induced diabetic mouse liver. Expression decreased when hepatocytes were treated with either rapamycin or LY 294002. This shows that uPFK-2 regulation is phosphoinositide 3-kinase-Akt-mammalian target of rapamycin dependent. These results indicate that fructose-2,6-bisphosphate is essential to the maintenance of the glycolytic flux necessary for providing energy and biosynthetic precursors to dividing cells.
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Affiliation(s)
- Joan Duran
- Unitat Bioquímica i Biologia Molecular, Universitat de Barcelona, Spain
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Liang P, Jiang B, Huang X, Xiao W, Zhang P, Yang X, Long J, Xiao X, Huang X. Anti-apoptotic role of EGF in HaCaT keratinocytes via a PPARbeta-dependent mechanism. Wound Repair Regen 2009; 16:691-8. [PMID: 19128264 DOI: 10.1111/j.1524-475x.2008.00419.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Epidermal growth factor (EGF) plays an important role in epithelial cell proliferation and apoptosis. Our recent studies found that EGF-attenuated tumor necrosis factor-alpha induced HaCaT keratinocyte apoptosis, and this effect was accompanied by up-regulation of the expression of peroxisome proliferator-activated receptor beta (PPARbeta). However, little is known about whether PPARbeta is functionally involved in the inhibition of keratinocyte apoptosis by EGF. Here, we showed that EGF up-regulated the DNA-binding and transcriptional regulation activities of PPARbeta. Antisense phosphorothioate oligonucleotides against PPARbeta markedly inhibited de novo synthesis of PPARbeta and attenuated the protective effect of EGF on tumor necrosis factor-alpha-induced apoptosis. L165041, a specific PPARbeta ligand, significantly enhanced the transcriptional regulation activity of PPARbeta and increased the protective effect of EGF. These results suggest a molecular mechanism by which EGF protects HaCaT keratinocytes against apoptosis in a PPARbeta-dependent manner.
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Affiliation(s)
- Pengfei Liang
- Department of Burns and Plastic Surgery, Xiangya Hospital, Central South University, Changsha, Hunan, China
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Cao C, Huang X, Han Y, Wan Y, Birnbaumer L, Feng GS, Marshall J, Jiang M, Chu WM. Galpha(i1) and Galpha(i3) are required for epidermal growth factor-mediated activation of the Akt-mTORC1 pathway. Sci Signal 2009; 2:ra17. [PMID: 19401591 DOI: 10.1126/scisignal.2000118] [Citation(s) in RCA: 107] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The precise mechanism whereby epidermal growth factor (EGF) activates the serine-threonine kinase Akt and the mammalian target of rapamycin (mTOR) complex 1 (mTORC1) remains elusive. Here, we report that the alpha subunits of the heterotrimeric guanine nucleotide-binding proteins (G proteins) Galpha(i1) and Galpha(i3) are critical for this activation process. Both Galpha(i1) and Galpha(i3) formed complexes with growth factor receptor binding 2 (Grb2)-associated binding protein 1 (Gab1) and the EGF receptor (EGFR) and were required for the phosphorylation of Gab1 and its subsequent interaction with the p85 subunit of phosphatidylinositol 3-kinase in response to EGF. Loss of Galpha(i1) and Galpha(i3) severely impaired the activation of Akt and of p70 S6 kinase and 4E-BP1, downstream targets of mTORC1, in response to EGF, heparin-binding EGF-like growth factor, and transforming growth factor alpha, but not insulin, insulin-like growth factor, or platelet-derived growth factor. In addition, ablation of Galpha(i1) and Galpha(i3) largely inhibited EGF-induced cell growth, migration, and survival and the accumulation of cyclin D1. Overall, this study suggests that Galpha(i1) and Galpha(i3) lie downstream of EGFR, but upstream of Gab1-mediated activation of Akt and mTORC1, thus revealing a role for Galpha(i) proteins in mediating EGFR signaling.
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Affiliation(s)
- Cong Cao
- Department of Molecular Microbiology and Immunology, Brown University, Providence, RI 02912, USA
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Berasain C, Castillo J, Perugorria MJ, Latasa MU, Prieto J, Avila MA. Inflammation and liver cancer: new molecular links . Ann N Y Acad Sci 2009; 1155:206-21. [PMID: 19250206 DOI: 10.1111/j.1749-6632.2009.03704.x] [Citation(s) in RCA: 289] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A connection between inflammation and cancer has been long suspected. Epidemiological studies have established that many tumors occur in association with chronic infectious diseases, and it is also known that persistent inflammation in the absence of infections increases the risk and accelerates the development of cancer. One clear example of inflammation-related cancer is hepatocellular carcinoma (HCC). HCC is a type tumor that slowly unfolds on a background of chronic inflammation mainly triggered by exposure to infectious agents (hepatotropic viruses) or to toxic compounds (ethanol). The molecular links that connect inflammation and cancer are not completely known, but evidences gathered over the past few years are beginning to define the precise mechanisms. In this article we review the most compelling evidences on the role of transcription factors such as NF-kappaB and STAT3, cytokines like IL-6 and IL-1alpha, ligands of the EGF receptor and other inflammatory mediators in cancer development, with special emphasis in HCC. The molecular dissection of the pathways connecting the inflammatory reaction and neoplasia will pave the way for better therapies to treat cancers.
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Affiliation(s)
- C Berasain
- Division of Hepatology and Gene Therapy, CIMA-Universidad de Navarra, Pamplona, Spain
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Meisdalen K, Dajani OF, Christoffersen T, Sandnes D. Prostaglandins Enhance Epidermal Growth Factor-Induced DNA Synthesis in Hepatocytes by Stimulation of E Prostanoid 3 and F Prostanoid Receptors. J Pharmacol Exp Ther 2007; 322:1044-50. [PMID: 17567965 DOI: 10.1124/jpet.107.121277] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Prostaglandins stimulate hepatocyte proliferation in vivo and in vitro. We have examined the role of E prostanoid (EP) and F prostanoid receptors (FP) in enhancing the growth-stimulatory effect of epidermal growth factor (EGF) in cultured hepatocytes. The EP2 receptor agonist butaprost had no significant effect on EGF-induced DNA synthesis. EP1 receptor-selective antagonists did not affect the enhancement by prostaglandin E(2) of EGF-stimulated DNA synthesis. Sulprostone, misoprostol, and fluprostenol strongly enhanced DNA synthesis and inhibited glucagon-stimulated cAMP accumulation, indicating that they all activated EP3 receptors. Sulprostone and fluprostenol, and to a lesser extent misoprostol, stimulated accumulation of inositol phosphates. The effects of fluprostenol and sulprostone on phospholipase C (PLC) were inhibited by the FP receptor antagonist AL-8810 [9 alpha, 15R-dihydroxy-11 beta-fluoro-15-(2,3-dihydro-1H-inden-2-yl)-16,17,18,19,20-pentanor-prosta-5Z, 13E-dien-1-oic acid], indicating that this effect was mediated by FP receptors. Inhibition of protein kinase C with GF109203X [2-[1-(3-dimetylaminopropyl)-1H-indol-3-yl]-maleimide] resulted in a partial reduction of the growth stimulation induced by fluprostenol, indicating a minor role of FP receptors. Combining fluprostenol with misoprostol, but not with sulprostone, resulted in partially additive effects on DNA synthesis, suggesting that both EP3 and FP receptors are involved. Combining sulprostone with misoprostol did not result in additive effects on DNA synthesis, suggesting that EP4 receptors were not involved. We conclude that, although a minor effect is exerted by FP receptors, the growth-stimulatory effects of prostaglandins in rat hepatocytes are mediated mainly by EP3 receptors. We have found no evidence of EP1 receptor involvement.
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Affiliation(s)
- Kristin Meisdalen
- Department of Pharmacology, Faculty of Medicine, University of Oslo, P.O. Box 1057 Blindern, N-0316 Oslo, Norway.
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