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Is there a role for prostanoid-mediated inhibition of IL-6 trans-signalling in the management of pulmonary arterial hypertension? Biochem Soc Trans 2019; 47:1143-1156. [PMID: 31341036 DOI: 10.1042/bst20190046] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 06/18/2019] [Accepted: 06/21/2019] [Indexed: 12/17/2022]
Abstract
Inflammation has been highlighted as a key factor in pulmonary arterial hypertension (PAH) development, particularly interleukin-6 (IL-6). IL-6 activates JAK-STAT signalling to induce transcription of pro-inflammatory and pro-angiogenic genes, enabling PAH progression, as well as the transcription of suppressor of cytokine signalling 3 (SOCS3) which limits IL-6 signalling. Current PAH therapies include prostanoid drugs which induce vasodilation via stimulating intracellular 3',5'-cyclic adenosine monophosphate (cAMP) levels. cAMP can also inhibit IL-6-mediated endothelial dysfunction via the induction of SOCS3. Thus, we propose that an important mechanism by which cAMP-mobilising prostanoid drugs limit PAH is by inhibiting IL-6-mediated pulmonary inflammation and remodelling via SOCS3 inhibition of IL-6 signalling. Further clarification may result in effective strategies with which to target the IL-6/JAK-STAT signalling pathway in PAH.
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Simondurairaj C, Krishnakumar R, Sundaram S, Venkatraman G. Interleukin-6 Receptor (IL-6R) Expression in Human Gastric Carcinoma and its Clinical Significance. Cancer Invest 2019; 37:293-298. [PMID: 31328584 DOI: 10.1080/07357907.2019.1638395] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The aim of the study is to analyse the expression of Interleukin-6 receptor in different human gastric tissue and to correlate with the clinicopathological features of the patients. Immunohistochemistry was done against the IL-6R antibody and the Q-score was calculated from the staining pattern. Higher Q-scores were observed in tumour cells than the adjacent normal cells which were statistically significant. We also observed a significant correlation between the expressions of IL-6R and the clinicopathological features These findings suggest that IL-6R may represent as a therapeutic target for gastric carcinoma and serve as a prognostic indicator, as well.
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Affiliation(s)
- C Simondurairaj
- Department of Pathology, Sri Ramachandra Institute of Higher Education and Research (Deemed to be University) , Chennai , India
| | - R Krishnakumar
- Department of Pathology, Sri Ramachandra Institute of Higher Education and Research (Deemed to be University) , Chennai , India
| | - Sandhya Sundaram
- Department of Pathology, Sri Ramachandra Institute of Higher Education and Research (Deemed to be University) , Chennai , India
| | - Ganesh Venkatraman
- Department of Human Genetics, Sri Ramachandra Institute of Higher Education and Research (Deemed to be University) , Chennai , India
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53
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Zhu S, Soutto M, Chen Z, Piazuelo MB, Washington MK, Belkhiri A, Zaika A, Peng D, El-Rifai W. Activation of IGF1R by DARPP-32 promotes STAT3 signaling in gastric cancer cells. Oncogene 2019; 38:5805-5816. [PMID: 31235784 PMCID: PMC6639157 DOI: 10.1038/s41388-019-0843-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 02/25/2019] [Accepted: 02/25/2019] [Indexed: 01/12/2023]
Abstract
Dopamine and cAMP-regulated phosphoprotein, Mr 32000 (DARPP-32), is frequently overexpressed in early stages of gastric cancers. We utilized in vitro assays, 3D gastric gland organoid cultures, mouse models, and human tissue samples to investigate the biological and molecular impact of DARPP-32 on activation of IGF1R and STAT3 signaling and gastric tumorigenesis. DARPP-32 enhanced phosphorylation of IGF1R (Y1135), a step that was critical for STAT3 phosphorylation at Y705, nuclear localization, and transcription activation. By using proximity ligation and co-immunoprecipitation assays, we found that IGF1R and DARPP-32 co-existed in the same protein complex. Binding of DARPP-32 to IGF1R promoted IGF1R phosphorylation with subsequent activation of downstream SRC and STAT3. Analysis of gastric tissues from the TFF1 knockout (KO) mouse model of gastric neoplasia, demonstrated phosphorylation of STAT3 in the early stages of gastric tumorigenesis. By crossing the TFF1 KO mice with DARPP-32 (DP) knockout (KO) mice, that have normal stomach, we obtained double knockout (TFF1 KO/DP KO). The gastric mucosa from the double KO mice did not show phosphorylation of IGF1R or STAT3. In addition, the TFF1 KO/DP KO mice had a significant delay in developing neoplastic gastric lesions. Analysis of human gastric cancer tissue microarrays, showed high levels of DARPP-32 and positive immunostaining for nuclear STAT3 in cancer tissues, as compared to non-cancer histologically normal tissues. In summary, the DARPP-32-IGF1R signaling axis plays a key role in regulating the STAT3 signaling, a critical step in gastric tumorigenesis.
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Affiliation(s)
- Shoumin Zhu
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida, USA
| | - Mohammed Soutto
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida, USA
- Department of Veterans Affairs, Miami Healthcare System, Miami, Florida, USA
| | - Zheng Chen
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida, USA
- Department of Veterans Affairs, Miami Healthcare System, Miami, Florida, USA
| | - M. Blanca Piazuelo
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - M. Kay Washington
- Department of Pathology, and Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Abbes Belkhiri
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Alexander Zaika
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida, USA
- Department of Veterans Affairs, Miami Healthcare System, Miami, Florida, USA
- Sylvester Comprehensive Cancer Center, University of Miami, Miami, Florida, USA
| | - Dunfa Peng
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida, USA
- Sylvester Comprehensive Cancer Center, University of Miami, Miami, Florida, USA
| | - Wael El-Rifai
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida, USA
- Department of Veterans Affairs, Miami Healthcare System, Miami, Florida, USA
- Sylvester Comprehensive Cancer Center, University of Miami, Miami, Florida, USA
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Cote B, Rao D, Alany RG, Kwon GS, Alani AW. Lymphatic changes in cancer and drug delivery to the lymphatics in solid tumors. Adv Drug Deliv Rev 2019; 144:16-34. [PMID: 31461662 DOI: 10.1016/j.addr.2019.08.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 08/05/2019] [Accepted: 08/23/2019] [Indexed: 02/08/2023]
Abstract
Although many solid tumors use the lymphatic system to metastasize, there are few treatment options that directly target cancer present in the lymphatic system, and those that do are highly invasive, uncomfortable, and/or have limitations. In this review we provide a brief overview of lymphatic function and anatomy, discusses changes that befall the lymphatics in cancer and the mechanisms by which these changes occur, and highlight limitations of lymphatic drug delivery. We then go on to summarize relevant techniques and new research for targeting cancer populations in the lymphatics and enhancing drug delivery intralymphatically, including intralymphatic injections, isolated limb perfusion, passive nano drug delivery systems, and actively targeted nanomedicine.
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Early Pattern of Epstein-Barr Virus Infection in Gastric Epithelial Cells by "Cell-in-cell". Virol Sin 2019; 34:253-261. [PMID: 30911896 DOI: 10.1007/s12250-019-00097-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 02/18/2019] [Indexed: 12/16/2022] Open
Abstract
Epstein-Barr virus (EBV) is an important human dsDNA virus, which has been shown to be associated with several malignancies including about 10% of gastric carcinomas. How EBV enters an epithelial cell has been an interesting project for investigation. "Cell-in-cell" infection was recently reported an efficient way for the entry of EBV into nasopharynx epithelial cells. The present approach was to explore the feasibility of this mode for EBV infection in gastric epithelial cells and the dynamic change of host inflammatory reaction. The EBV-positive lymphoblastic cells of Akata containing a GFP tag in the viral genome were co-cultured with the gastric epithelial cells (GES-1). The infection situation was observed under fluorescence and electron microscopies. Real-time quantitative PCR and Western-blotting assay were employed to detect the expression of a few specific cytokines and inflammatory factors. The results demonstrated that EBV could get into gastric epithelial cells by "cell-in-cell" infection but not fully successful due to the host fighting. IL-1β, IL-6 and IL-8 played prominent roles in the cellular response to the infection. The activation of NF-κB and HSP70 was also required for the host antiviral response. The results imply that the gastric epithelial cells could powerfully resist the virus invader via cell-in-cell at the early stage through inflammatory and innate immune responses.
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Wu J, Han Y, Zou X, Zhu K, Wang Z, Ye X, Liu Y, Dong S, Chen X, Liu D, Wen Z, Wang Y, Huang S, Zhou Z, Zeng C, Huang C, Zheng S, Du X, Huang X, Zhang B, Jing C, Yang G. Silica nanoparticles as an enhancer in the IL-1β-induced inflammation cycle of A549 cells. Immunopharmacol Immunotoxicol 2019; 41:199-206. [PMID: 30724633 DOI: 10.1080/08923973.2019.1569046] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Objective: The industrial production and combustion of coal can produce silica nanoparticles (nano-SiO2). It enters the human body mainly through the respiratory tract and exerts a toxic effect. However, whether nano-SiO2 can increase the IL-1β-induced inflammatory expression in A549 cells has not been tested. Therefore, the synergistic toxicity of nano-SiO2 and IL-1β to A549 was observed in our study. Materials and methods: We exposed A549 cells to nano-SiO2 (0, 100, 500, and 1000 μg/ml) for 12 and 24 h. The effect of nano-SiO2 on the viability of A549 cells was observed by the CCK-8 method. The A549 cells were exposed to nano-SiO2 (1 mg/mL) and cytokine IL-1β (10 ng/mL) for 4 h, and we detected the expression of IL-1β and IL-6 cytokines by real time quantitative polymerase chain (RT-qPCR) and enzyme linked immunosorbent assay (ELISA). The expression of β-Actin, I-κB, phospho-ERK1/2 (P-ERK1/2), total-ERK1/2 (T-ERK1/2), phospho-JNK (P-JNK), total-JNK (T-JNK), phospho-P38 (P-P38), and total-P38 (T-P38) in A549 cells was detected by the Western Blot method. Results: The nano-SiO2 treatment resulted in a time-dependent decrease in the viability of A549 cells. The synergistic effect of nano-SiO2 and IL-1β was observed on the new production of IL-1β and IL-6 in A549 cells. The Western blot results showed that nano-SiO2 can increase the expression of IL-1β and IL-6 by promoting the phosphorylation of ERK1/2 and elevating the phosphorylation of I-κB by IL-1β. IL-1β and IL-6 were induced by nano-SiO2, and the IL-1β treatment with 20 μM of I-κBα phosphorylation inhibitor (PD98059) and 20 μM of ERK1/2 inhibitor (BAY11-7082) for 1 h was significantly lower than that of the control group in A549 cells. Discussion and conclusion: These results indicated that nano-SiO2 had a toxic effect on A549 cells, and this effect could increase IL-1β on the A549 cell-induced inflammatory response. The results suggested that the release of IL-1β and IL-6 in A549 was enhanced by the synergistic IL-1β-induced phosphorylation of ERK1/2 and I-κB. This process is similar to a snowball, and it is possible that IL-1β is continuously produced and repeatedly superimposed in A549 cells to produce an inflammatory effect; then, a vicious circle occurs, and an inflammatory storm is accelerated.
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Affiliation(s)
- Jing Wu
- a Department of Pathogen Biology, School of Medicine , Jinan University , Guangzhou , China.,b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Yajing Han
- a Department of Pathogen Biology, School of Medicine , Jinan University , Guangzhou , China.,b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Xiaoqian Zou
- a Department of Pathogen Biology, School of Medicine , Jinan University , Guangzhou , China.,b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Kehui Zhu
- a Department of Pathogen Biology, School of Medicine , Jinan University , Guangzhou , China.,b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Zichen Wang
- b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Xiaohong Ye
- a Department of Pathogen Biology, School of Medicine , Jinan University , Guangzhou , China.,b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Yumei Liu
- a Department of Pathogen Biology, School of Medicine , Jinan University , Guangzhou , China.,b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Shirui Dong
- a Department of Pathogen Biology, School of Medicine , Jinan University , Guangzhou , China.,b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Xiaojing Chen
- a Department of Pathogen Biology, School of Medicine , Jinan University , Guangzhou , China.,b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Dandan Liu
- b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Zihao Wen
- b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Yao Wang
- b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Shiqi Huang
- b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Zixing Zhou
- b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Chengli Zeng
- b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Chuican Huang
- b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Shaoling Zheng
- b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Xiuben Du
- b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Xiuxia Huang
- b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China
| | - Baohuan Zhang
- a Department of Pathogen Biology, School of Medicine , Jinan University , Guangzhou , China
| | - Chunxia Jing
- b Department of Epidemiology, School of Medicine , Jinan University , Guangzhou , China.,c Guangzhou Key Laboratory of Environmental Exposure and Health in Guangzhou , Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University , Guangzhou , Guangdong , China
| | - Guang Yang
- a Department of Pathogen Biology, School of Medicine , Jinan University , Guangzhou , China.,c Guangzhou Key Laboratory of Environmental Exposure and Health in Guangzhou , Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University , Guangzhou , Guangdong , China
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Talbot H, Saada S, Naves T, Gallet PF, Fauchais AL, Jauberteau MO. Regulatory Roles of Sortilin and SorLA in Immune-Related Processes. Front Pharmacol 2019; 9:1507. [PMID: 30666202 PMCID: PMC6330335 DOI: 10.3389/fphar.2018.01507] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 12/10/2018] [Indexed: 12/25/2022] Open
Abstract
Sortilin, also known as Neurotensin Receptor-3, and the sorting-related receptor with type-A repeats (SorLA) are both members of the Vps10p domain receptor family. Initially identified in CNS cells, they are expressed in various other cell types where they exert multiple functions. Although mostly studied for its involvement in Alzheimer’s disease, SorLA has recently been shown to be implicated in immune response by regulating IL-6-mediated signaling, as well as driving monocyte migration. Sortilin has been shown to act as a receptor, as a co-receptor and as an intra- and extracellular trafficking regulator. In the last two decades, deregulation of sortilin has been demonstrated to be involved in many human pathophysiologies, including neurodegenerative disorders (Alzheimer and Parkinson diseases), type 2 diabetes and obesity, cancer, and cardiovascular pathologies such as atherosclerosis. Several studies highlighted different functions of sortilin in the immune system, notably in microglia, pro-inflammatory cytokine regulation, phagosome fusion and pathogen clearance. In this review, we will analyze the multiple roles of sortilin and SorLA in the human immune system and how their deregulation may be involved in disease development.
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Affiliation(s)
- Hugo Talbot
- Faculty of Medicine, University of Limoges, Limoges, France
| | - Sofiane Saada
- Faculty of Medicine, University of Limoges, Limoges, France
| | - Thomas Naves
- Faculty of Medicine, University of Limoges, Limoges, France
| | | | - Anne-Laure Fauchais
- Faculty of Medicine, University of Limoges, Limoges, France.,Department of Internal Medicine, University Hospital Limoges Dupuytren Hospital, Limoges, France
| | - Marie-Odile Jauberteau
- Faculty of Medicine, University of Limoges, Limoges, France.,Department of Immunology, University Hospital Limoges Dupuytren Hospital, Limoges, France
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58
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Wang ZF, Ma DG, Wang L, Feng L, Fu JW, Li Y, Wang DT, Jia YF. Paeoniflorin Inhibits Migration- and Invasion-Promoting Capacities of Gastric Cancer Associated Fibroblasts. Chin J Integr Med 2018; 25:837-844. [PMID: 30361813 DOI: 10.1007/s11655-018-2985-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/12/2017] [Indexed: 01/27/2023]
Abstract
OBJECTIVE To investigate the inhibitory effects of paeoniflorin on migration- and invasion-promoting capacities of gastric cancer associated fibroblasts (GCAFs) and to explore the molecular mechanism underlying the effects. METHODS Paired gastric normal fifbroblast (GNF) and GCAF cultures were established from resected tissues. GCAFs were treated with control medium, or 2.5, 5 or 10 μg/mL paeoniflorin. Conditioned media were prepared from GNFs, GCAFs, control-treated GCAFs and paeoniflorin-treated GCAFs, and used to culture AGS human gastric cancer cells. The migration and invasion capacities of AGS cells were determined with wound healing test and transwell invasion assay, respectively. The interleukin 6 (IL-6) mRNA and microRNA-149 expression in GCAFs were detected by reverse transcription-quantitative polymerase chain reaction. The IL-6 protein expression and secretion by GCAFs were measured with Western blot and enzyme-linked immunosorbent assay analysis, respectively. The protein levels of phosphorylated signal transducer and activator of transcription 3 (STAT3), matrix metalloproteinase (MMP) and MMP9 in AGS cells were examined by Western blot. RESULTS GCAFs displayed enhanced capacities to induce AGS cell migration and invasion as compared with GNFs. Paeoniflorin treatment significantly inhibited the migration- and invasion-promoting capacities of GCAFs (P<0.05). GCAFs produced and secreted more IL-6 into the conditioned medium than GNFs, leading to over-activation of STAT3-MMP signaling in AGS cells. Paeoniflorin suppressed IL-6 production and secretion by up-regulating microRNA149 expression in GCAFs, and subsequently prevented GCAFs from activating IL-6-STAT3-MMP signaling of AGS cells. CONCLUSIONS Paeoniflorin inhibits the migration- and invasion-promoting capacities of GCAFs by targeting microRNA-149 and IL-6. Paeoniflorin is potentially a novel therapeutic agent against cancer microenvironment.
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Affiliation(s)
- Zhen-Fei Wang
- The Laboratory for Tumor Molecular Diagnosis, Affiliated People's Hospital of Inner Mongolia Medical University, Hohhot, 010020, China
| | - Da-Guang Ma
- The Laboratory for Tumor Molecular Diagnosis, Affiliated People's Hospital of Inner Mongolia Medical University, Hohhot, 010020, China
| | - Ling Wang
- Department of Gastroenterology, Affiliated People's Hospital of Inner Mongolia Medical University, Hohhot, 010020, China
| | - Li Feng
- Department of Gastroenterology, Affiliated People's Hospital of Inner Mongolia Medical University, Hohhot, 010020, China
| | - Jian-Wei Fu
- The Central Laboratory of People' Hospital of Wuhai City, Inner Mongolia Autonomous Region, Wuhai, 016000, China
| | - Ying Li
- Department of Gastroenterology, Affiliated People's Hospital of Inner Mongolia Medical University, Hohhot, 010020, China
| | - Dan-Ting Wang
- Department of Gastroenterology, Affiliated People's Hospital of Inner Mongolia Medical University, Hohhot, 010020, China
| | - Yong-Feng Jia
- The Laboratory for Tumor Molecular Diagnosis, Affiliated People's Hospital of Inner Mongolia Medical University, Hohhot, 010020, China.
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Meng X, Zhu S, Dong Q, Zhang S, Ma J, Zhou C. Expression of Th17/Treg related molecules in gastric cancer tissues. TURKISH JOURNAL OF GASTROENTEROLOGY 2018; 29:45-51. [PMID: 29391307 DOI: 10.5152/tjg.2018.17114] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND/AIMS The function of regulatory T cells (Treg) and helper T cells 17 (Th17) related indexes, such as interleukin (IL)-6, IL-17, transforming growth factor (TGF)-β1, and forkhead box protein 3(FoxP3) in gastric adenocarcinoma tissues remains undefined. We investigated and analyzed the relevance of the proteins with the clinicopathological characteristics and the interactions among them in gastric cancer. MATERIALS AND METHODS A total 68 gastric cancer patients and 40 healthy controls were enrolled. Immunohistochemistry (IHC) as well as quantitative real-time reverse transcription- polymerase chain reaction (RT-PCR) was used to determine the expression levels of IL-6, TGF-β1, IL-17, and FoxP3 in the prepared tissues. Statistical analysis included ANOVA and chi-square test. RESULTS The expression levels of IL-6, IL-17, FoxP3, and TGF-β1 had significantly increased in cancer tissues compared to controls. Clinical staging of gastric cancer were correlated with the rise of IL-6, IL-17, FoxP3, and TGF-β1 levels expressed in cancer tissues. The expression level of TGF-β1 and IL-6 was positively related to that of IL-17 and FoxP3, similar to FoxP3 and IL-17 in gastric cancer tissues. CONCLUSION IL-6, TGF-β1, FoxP3, and IL-17 may promote the progression of gastric cancer individually or jointly and have complex interactions.
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Affiliation(s)
- Xinying Meng
- Department of Health Care, Qingdao Municipal Hospital (East), Qingdao, China
| | - Shengtao Zhu
- Beijing Digestive Diseases Center, Beijing Friendship Hospital, Beijing, China; Beijing Key Laboratory for Precancerous Lesion of Digestive Diseases, Beijing, China
| | - Quanjiang Dong
- Department of Gastroenterology, Qingdao Municipal Hospital (East), Qingdao, China
| | - Shutian Zhang
- Beijing Digestive Diseases Center, Beijing Friendship Hospital, Beijing, China; Beijing Key Laboratory for Precancerous Lesion of Digestive Diseases, Beijing, China
| | - Jian Ma
- Department of Health Care, Qingdao Municipal Hospital (East), Qingdao, China
| | - Changhong Zhou
- Department of Health Care, Qingdao Municipal Hospital (East), Qingdao, China
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Chen Y, Tan W, Wang C. Tumor-associated macrophage-derived cytokines enhance cancer stem-like characteristics through epithelial-mesenchymal transition. Onco Targets Ther 2018; 11:3817-3826. [PMID: 30013362 PMCID: PMC6038883 DOI: 10.2147/ott.s168317] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Cancer stem cells are a small population of cells with the potential for self-renewal and multi-directional differentiation and are an important source of cancer initiation, treatment resistance, and recurrence. Epithelial-mesenchymal transition (EMT) is a process in which epithelial cells lose their epithelial phenotype and convert to mesenchymal cells. Recent studies have shown that cancer cells undergoing EMT can become stem-like cells. Many kinds of tumors are associated with chronic inflammation, which plays a role in tumor progression. Among the various immune cells mediating chronic inflammation, macrophages account for ~30%-50% of the tumor mass. Macrophages are highly infiltrative in the tumor microenvironment and secrete a series of inflammatory factors and cytokines, such as transforming growth factor (TGF)-β, IL-6, IL-10, and tumor necrosis factor (TNF)-α, which promote EMT and enhance the stemness of cancer cells. This review summarizes and discusses recent research findings on some specific mechanisms of tumor-associated macrophage-derived cytokines in EMT and cancer stemness transition, which are emerging targets of cancer treatment.
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Affiliation(s)
- Yongxu Chen
- Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangdong Geriatric Institute, Guangzhou, Guangdong Province, People's Republic of China, .,School of Medicine, South China University of Technology, Guangzhou, Guangdong Province, People's Republic of China,
| | - Wei Tan
- Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangdong Geriatric Institute, Guangzhou, Guangdong Province, People's Republic of China,
| | - Changjun Wang
- Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangdong Geriatric Institute, Guangzhou, Guangdong Province, People's Republic of China, .,School of Medicine, South China University of Technology, Guangzhou, Guangdong Province, People's Republic of China,
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Wu Y, Tian L, Xu Y, Zhang M, Xiang S, Zhao J, Wang Z. CXCR7 silencing inhibits the migration and invasion of human tumor endothelial cells derived from hepatocellular carcinoma by suppressing STAT3. Mol Med Rep 2018; 18:1644-1650. [PMID: 29901083 DOI: 10.3892/mmr.2018.9114] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Accepted: 05/11/2018] [Indexed: 12/28/2022] Open
Abstract
C-X-C chemokine receptor type 7 (CXCR7) is reported to be overexpressed in tumor endothelial cells (TECs), which are the primary target cells of antivascular chemotherapy. However, the role of CXCR7 in TECs is not fully understood. In the present study, CXCR7 expression was inhibited in TECs derived from hepatocellular carcinoma (HCC) using short hairpin (sh)RNA plasmids to investigate the role of CXCR7 in the regulation of migration and invasion of TECs as well as its underlying mechanisms. The data showed that the downregulation of CXCR7 significantly inhibited the migration and invasion of TECs. Further study showed that silencing CXCR7 resulted in decreased phosphorylated signal transducer and activator of transcription 3 (STAT3) at Tyr705 and its downstream target genes in TECs, including matrix metalloproteinase‑2 (MMP2) and vascular endothelial growth factor (VEGF). However, restoring STAT3 phosphorylation abolished the CXCR7‑shRNA‑induced decrease in TECs migration and invasion, as well as the downregulation of MMP2 and VEGF in TECs. These findings indicate that CXCR7 may regulate the migration and invasion of TECs derived from HCC via the STAT3 signaling pathway and that CXCR7 could be a potential target for the antivascular therapy of HCC.
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Affiliation(s)
- Ye Wu
- Department of General Surgery, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia 010059, P.R. China
| | - Lei Tian
- Department of Anesthesia, General Hospital of The PLA Rocket Force, Beijing 100088, P.R. China
| | - Yongle Xu
- Department of Vascular Surgery, General Hospital of PLA, Beijing 100853, P.R. China
| | - Minhong Zhang
- Department of Vascular Surgery, General Hospital of PLA, Beijing 100853, P.R. China
| | - Shengqing Xiang
- Department of Pharmacy, General Hospital of The PLA Rocket Force, Beijing 100088, P.R. China
| | - Jianguo Zhao
- Department of General Surgery, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia 010059, P.R. China
| | - Zhenxia Wang
- Department of General Surgery, Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia 010059, P.R. China
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Upregulation of bone morphogenetic protein 1 is associated with poor prognosis of late-stage gastric Cancer patients. BMC Cancer 2018; 18:508. [PMID: 29720137 PMCID: PMC5930761 DOI: 10.1186/s12885-018-4383-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 04/17/2018] [Indexed: 01/02/2023] Open
Abstract
Background Gastric cancer is the eighth most common cancer in Taiwan, with a 40% 5-year survival rate. Approximately 40% of patients are refractory to chemotherapy. Currently, the anti-HER2 therapy is the only clinically employed targeted therapy. However, only 7% patients in Taiwan are HER2-positive. Identifying candidate target genes will facilitate the development of adjuvant targeted therapy to increase the efficacy of gastric cancer treatment. Methods Clinical specimens were analyzed by targeted RNA sequencing to assess the expression levels of target genes. Statistical significance of differential expression and correlation between specimens was evaluated. The correlation with patient survival was analyzed as well. In vitro cell mobility was determined using wound-healing and transwell mobility assays. Results Expression of BMP1, COL1A1, STAT3, SOX2, FOXA2, and GATA6 was progressively dysregulated through the stages of gastric oncogenesis. The expression profile of these six genes forms an ubiquitously biomarker signature that is sufficient to differentiate cancer from non-cancerous specimens. High expression status of BMP1 correlates with poor long-term survival of late-stage patients. In vitro, suppression of BMP1 inhibits the mobility of the gastric cancer cell lines, indicating a role of BMP1 in metastasis. Conclusions BMP1 is upregulated in gastric cancer and is correlated with poor patient survival. Suppression of BMP1 reduced gastric cancer mobility in vitro. Our finding suggests that anti-BMP1 therapy will likely augment the efficacy of standard chemotherapy and improve the treatment outcome.
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63
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Chen X, Wang Y, Wang J, Wen J, Jia X, Wang X, Zhang H. Accumulation of T-helper 22 cells, interleukin-22 and myeloid-derived suppressor cells promotes gastric cancer progression in elderly patients. Oncol Lett 2018; 16:253-261. [PMID: 29928409 PMCID: PMC6006301 DOI: 10.3892/ol.2018.8612] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Accepted: 07/27/2017] [Indexed: 12/12/2022] Open
Abstract
Chronic inflammation and immunosuppression lead to aging and tumorigenesis. T-helper 22 (Th22) cells, interleukin 22 (IL-22) and myeloid-derived suppressor cells (MDSCs) serve an important role in inflammatory-immune diseases and cancer. However, the status of Th22 cells, IL-22 and MDSCs in aging and elderly gastric cancer progression is unknown. In the present study, 39 elderly patients with gastric cancer (EGC), 32 elderly healthy controls (HE) and 31 young healthy controls (HY) were enrolled, and the peripheral Th22, Th17 and Th1 cells, and MDSCs, were examined using flow cytometry. Plasma levels of IL-22, IL-6 and tumor necrosis factor-α (TNF-α) were examined using ELISA. IL-22 protein levels in tumor tissues were examined using immunohistochemistry. There were increased numbers of peripheral Th22 and Th17 cells, and MDSCs, as well as increased plasma levels of IL-22, IL-6 and TNF-α in EGC compared with HE and HY. However, HE exhibited significantly increased levels of peripheral Th22 and Th17 cells as well as IL-6 and TNF-α compared with HY. Immunohistochemical analysis demonstrated that IL-22 protein accumulated in tumor cells and lymphocytes in the tumor microenvironment. The results obtained demonstrated that peripheral Th22 and Th17 cells as well as IL-6 and TNF-α plasma levels increased with aging. Furthermore, Th22 and Th17 cells, MDSCs, and IL-22 may be used as prognostic markers for identifying gastric cancer in elderly patients.
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Affiliation(s)
- Xuehua Chen
- Department of Geratology, The First Affiliated Hospital, Dalian Medical University, Dalian, Liaoning 116000, P.R. China
| | - Yanfu Wang
- Department of Geratology, The First Affiliated Hospital, Dalian Medical University, Dalian, Liaoning 116000, P.R. China
| | - Jiali Wang
- Department of Geratology, The First Affiliated Hospital, Dalian Medical University, Dalian, Liaoning 116000, P.R. China
| | - Jinhui Wen
- Department of Geratology, The First Affiliated Hospital, Dalian Medical University, Dalian, Liaoning 116000, P.R. China
| | - Xuzhao Jia
- Department of Geratology, The First Affiliated Hospital, Dalian Medical University, Dalian, Liaoning 116000, P.R. China
| | - Xiaojun Wang
- Department of Geratology, The First Affiliated Hospital, Dalian Medical University, Dalian, Liaoning 116000, P.R. China
| | - Hua Zhang
- Department of Geratology, The First Affiliated Hospital, Dalian Medical University, Dalian, Liaoning 116000, P.R. China
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64
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Wang XP, Wang QX, Lin HP, Chang N. Anti-tumor bioactivities of curcumin on mice loaded with gastric carcinoma. Food Funct 2018; 8:3319-3326. [PMID: 28848967 DOI: 10.1039/c7fo00555e] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Curcumin, a derivative from the dried rhizome of curcuma longa, has been proven to possess anti-tumor effects. However, the detailed molecular mechanisms have not been fully elucidated. In this study, we aimed to explore the anti-tumor mechanisms of curcumin in treating gastric cancer. BALB/C mice grafted with a mouse gastric adenocarcinoma cell line (MFC) were used as the experimental model. Mice received different doses of curcumin after grafting. Tumor size was measured and tumor weight was determined after tumor inoculation. TUNEL assay and flow cytometric analysis were applied to evaluate the apoptosis of the cancer cells. Serum cytokines IFN-γ, TNF-α, granzyme B and perforin were detected by ELISA assay. The anti-tumor effect was determined using cytotoxic T-lymphocyte (CTL) assays and in vivo tumor prevention tests. The expression of DEC1, HIF-1α, STAT3 and VEGF in tumor tissues was examined by immunostaining and analyzed using an Image J analysis system. Compared with controls, tumor growth (size and weight) was significantly inhibited by curcumin treatment (P < 0.05). The apoptotic index in gastric cancer cells was significantly increased in the curcumin treatment group. Splenocyte cells from mice treated with curcumin exhibited higher cytolytic effects on MFC cancer cells than those from mice treated with saline (P < 0.01). The expression of DEC1, HIF-1α, STAT3 and VEGF in tumor tissues was down-regulated after curcumin treatment. Our results indicate that curcumin inhibits the proliferation of gastric carcinoma by inducing the apoptosis of tumor cells, activating immune cells to secrete a large amount of cytokines, and down-regulating the DEC1, HIF-1α, VEGF and STAT3 signal transduction pathways.
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Affiliation(s)
- Xiao-Ping Wang
- Laboratory of Molecular Biology & Pathology, Shaanxi University of Chinese Medicine, Xianyang, PR China.
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65
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Zuo E, Lu Y, Yan M, Pan X, Cheng X. Increased expression of hepcidin and associated upregulation of JAK/STAT3 signaling in human gastric cancer. Oncol Lett 2017; 15:2236-2244. [PMID: 29434930 PMCID: PMC5777096 DOI: 10.3892/ol.2017.7574] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 07/03/2017] [Indexed: 12/16/2022] Open
Abstract
Gastric cancer is one of the most common malignancies with high cancer-associated mortality rate globally. Hepcidin is the peptide hormone, which is critically important in the regulation of systemic iron homeostasis. Cumulating evidence has reported that the disturbed local expression of hepcidin may serve as a predictive biomarker in assessing the clinical outcomes in a range of cancer types. However, the expression profile of hepcidin in human gastric cancer is remains to be investigated. In the present retrospective study, using archived paraffin-embedded tissue blocks, the local production of hepcidin by immunohistochemical analysis was detected, and then its correlation with clinicopathological characteristics in human gastric cancer was evaluated. In parallel, using western blotting, quantitative reverse transcription polymerase chain reaction and chromatin immunoprecipitation assay, the local status of Janus kinase (JAK)/signal transducer and activator of transcription 3 (STAT3) signaling in response to inflammatory stimuli mediated by interleukin (IL)-6, which in turn regulates transcriptional activity of hepcidin gene (HAMP) was also assessed. The results indicated that, the local production of hepcidin was significantly elevated in tumor tissues compared with adjacent non-tumor tissues, and was tightly correlated with increasing tumor stages according to the tumor node metastasis (TNM) classification. In addition, JAK/STAT3 signaling and the STAT3 binding affinity to the HAMP gene promoter were significantly enhanced, in parallel with an increased expression of hepcidin, in tumor tissues compared with adjacent non-tumor tissues. Collectively, the present study indicated that local expression of hepcidin in gastric cancer tumor tissues was positively correlated with increasing tumor stages, which may be closely associated with the upregulation of IL-6-mediated JAK/STAT3 signaling in human gastric cancer.
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Affiliation(s)
- Erdong Zuo
- Department of Chemotherapy and Hematology, Taicang Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215400, P.R. China
| | - Ye Lu
- Department of Chemotherapy and Hematology, Taicang Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215400, P.R. China
| | - Min Yan
- Department of Chemotherapy and Hematology, Taicang Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215400, P.R. China
| | - Xiangtao Pan
- Department of Chemotherapy and Hematology, Taicang Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215400, P.R. China
| | - Xu Cheng
- Department of Chemotherapy and Hematology, Taicang Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215400, P.R. China
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66
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Ferretti E, Di Carlo E, Ognio E, Fraternali-Orcioni G, Corcione A, Belmonte B, Ravetti JL, Tripodo C, Ribatti D, Pistoia V. IL-25 dampens the growth of human germinal center-derived B-cell non Hodgkin Lymphoma by curtailing neoangiogenesis. Oncoimmunology 2017; 7:e1397249. [PMID: 29399397 DOI: 10.1080/2162402x.2017.1397249] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 10/20/2017] [Accepted: 10/21/2017] [Indexed: 12/13/2022] Open
Abstract
Interleukin (IL)-25, a member of the IL-17 cytokine superfamily, is produced by immune and non-immune cells and exerts type 2 pro-inflammatory effects in vitro and in vivo. The IL-25 receptor(R) is composed of the IL-17RA/IL-17RB subunits. Previous work showed that germinal centre (GC)-derived B-cell non Hodgkin lymphomas (B-NHL) expressed IL-17AR, formed by IL-17RA and IL-17RC subunits, and IL-17A/IL-17AR axis promoted B-NHL growth by stimulating neoangiogenesis. Here, we have investigated expression and function of IL-25/IL-25R axis in lymph nodes from human GC-derived B-NHL, i.e. Follicular Lymphoma (FL,10 cases), Diffuse Large B Cell Lymphoma (6 cases) and Burkitt Lymphoma (3 cases). Tumor cells expressed IL-25R and IL-25 that was detected also in non-malignant cells by flow cytometry. Immunohistochemical studies confirmed expression of IL-25R and IL-25 in FL cells, and highlighted IL-25 expression in bystander elements of the FL microenvironment. IL-25 i) up-regulated phosphorylation of NFkBp65, STAT-1 and JNK in B-NHL cells; ii) inhibited in vitro proliferation of the latter cells; iii) exerted anti-tumor activity in two in vivo B-NHL models by dampening expression of pro-angiogenic molecules as VEGF-C, CXCL6 and ANGPT3. In conclusion, IL-25, that is intrinsically pro-angiogenic, inhibits B-NHL growth by reprogramming the angiogenic phenotype of B-NHL cells.
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Affiliation(s)
- Elisa Ferretti
- Laboratory of Experimental Therapies in Oncology and Laboratory of Oncology, Istituto Giannina Gaslini, Genova, Italy
| | - Emma Di Carlo
- Department of Medicine and Sciences of Aging, "G. d'Annunzio" University and Ce.SI-MeT, Aging Research Center, Pathological Anatomy and Immuno-Oncology Unit, "G. d'Annunzio" University, Chieti, Italy
| | - Emanuela Ognio
- Animal Facility, IRCCS AOU San Martino - IST - Istituto Nazionale per la Ricerca sul Cancro, Genova, Italy
| | - Giulio Fraternali-Orcioni
- Unit of Pathology, IRCCS AOU San Martino - IST - Istituto Nazionale per la Ricerca sul Cancro, Genova, Italy
| | - Anna Corcione
- Laboratorio di Oncologia and Laboratorio malattie autoinfiammatorie e immudeficienze, Istituto Giannina Gaslini, Genova, Italy
| | - Beatrice Belmonte
- Tumor Immunology Unit, Department of Health Science, Human Pathology Section, University of Palermo, Palermo, Italy
| | - Jean Louis Ravetti
- Unit of Pathology, IRCCS AOU San Martino - IST - Istituto Nazionale per la Ricerca sul Cancro, Genova, Italy
| | - Claudio Tripodo
- Laboratorio di Oncologia and Laboratorio malattie autoinfiammatorie e immudeficienze, Istituto Giannina Gaslini, Genova, Italy
| | - Domenico Ribatti
- Department of Basic Medical Sciences, Neurosciences and Sensory Organs, University of Bari Medical School, Bari, Italy, and National Cancer Institute "Giovanni Paolo II", Bari, Italy
| | - Vito Pistoia
- Immunology Research Area, Ospedale Pediatrico Bambino Gesù, Roma, Italy
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67
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Han C, Sun B, Zhao X, Zhang Y, Gu Q, Liu F, Zhao N, Wu L. Phosphorylation of STAT3 Promotes Vasculogenic Mimicry by Inducing Epithelial-to-Mesenchymal Transition in Colorectal Cancer. Technol Cancer Res Treat 2017; 16:1209-1219. [PMID: 29333928 PMCID: PMC5762092 DOI: 10.1177/1533034617742312] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Vasculogenic mimicry refers to the process by which highly invasive cancer cells mimic endothelial cells by forming blood channels. Vasculogenic mimicry is important for the invasion and metastasis of tumor cells in colorectal cancer. STAT3 was initially identified as a mediator of the inflammation-associated acute phase response. The phosphorylation of Signal Transducers and Activators of Transcription 3 (p-STAT3) is closely related to tumor invasion and migration. We analyzed the relationship between p-STAT3 and vasculogenic mimicry formation in 65 human colorectal cancer samples, and the results showed that the expression of p-STAT3 is significantly correlated with vasculogenic mimicry, tumor metastasis, Tumor, Lymph Node and Metastasis Stage (TNM Stage), and poor prognosis. It is known that interleukin 6 can induce the phosphorylation of STAT3. We found that using interleukin 6 to induce p-STAT3 activation in colorectal cancer cell lines can result in vasculogenic mimicry and using AG490 to suppress p-STAT3 activation restrained vasculogenic mimicry. Furthermore, the state of p-STAT3 activation can affect epithelial-to-mesenchymal transition. By immunofluorescence double staining, we discovered that p-STAT3 expression is more directly correlated with the epithelial-to-mesenchymal transition marker vimentin than with the vasculogenic mimicry-related protein VE-cadherin. These data show that activated p-STAT3 upregulates epithelial-to-mesenchymal transition–related proteins and promotes vasculogenic mimicry.
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Affiliation(s)
- Cong Han
- 1 Department of Pathology, Tianjin Medical University, Tianjin, People's Republic of China
| | - Baocun Sun
- 1 Department of Pathology, Tianjin Medical University, Tianjin, People's Republic of China.,2 Department of Pathology, General Hospital of Tianjin Medical University, Tianjin, People's Republic of China.,3 Department of Pathology, Cancer Hospital of Tianjin Medical University, Tianjin, People's Republic of China
| | - Xiulan Zhao
- 1 Department of Pathology, Tianjin Medical University, Tianjin, People's Republic of China.,2 Department of Pathology, General Hospital of Tianjin Medical University, Tianjin, People's Republic of China
| | - Yanhui Zhang
- 3 Department of Pathology, Cancer Hospital of Tianjin Medical University, Tianjin, People's Republic of China
| | - Qiang Gu
- 1 Department of Pathology, Tianjin Medical University, Tianjin, People's Republic of China.,2 Department of Pathology, General Hospital of Tianjin Medical University, Tianjin, People's Republic of China
| | - Fang Liu
- 1 Department of Pathology, Tianjin Medical University, Tianjin, People's Republic of China
| | - Nan Zhao
- 1 Department of Pathology, Tianjin Medical University, Tianjin, People's Republic of China
| | - Lili Wu
- 2 Department of Pathology, General Hospital of Tianjin Medical University, Tianjin, People's Republic of China
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68
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Amani H, Ajami M, Nasseri Maleki S, Pazoki-Toroudi H, Daglia M, Tsetegho Sokeng AJ, Di Lorenzo A, Nabavi SF, Devi KP, Nabavi SM. Targeting signal transducers and activators of transcription (STAT) in human cancer by dietary polyphenolic antioxidants. Biochimie 2017; 142:63-79. [DOI: 10.1016/j.biochi.2017.08.007] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Accepted: 08/08/2017] [Indexed: 12/11/2022]
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69
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Mirzaei A, Ghaffari SH, Nikbakht M, Kamranzadeh Foumani H, Vaezi M, Mohammadi S, Alimoghaddam K, Ghavamzadeh A. OPN b and c Isoforms Doubtless Veto Anti-angiogenesis Effects of Curcumin in Combination with Conventional AML Regiment. Asian Pac J Cancer Prev 2017; 18:2591-2599. [PMID: 28952709 PMCID: PMC5720671 DOI: 10.22034/apjcp.2017.18.9.2591] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Osteopontin (OPN) is an extracellular structural protein that is secreted by osteoblasts and hematopoietic cells. It suppresses the proliferation of hematopoietic stem and also plays an important role in promoting survival and drug resistance in leukemic stem cells (LSCs). Since the role of OPN isoforms in AML angiogenesis are remaining controversial, in the present study, we aimed to evaluate whether curcumin (CUR), as a known natural component with anti-angiogenesis effects, in a combination of AML conventional regiment has the potency to preclude induced anti-angiogenesis effects of OPN isoforms or not? Leukemia cells were treated with different concentration of CUR and AML conventional drugs alone and/or in combination with together to find effective doses and IC50 values. Percentages of apoptotic cells were evaluated by Annexin/PI staining and mRNA levels of OPN isoforms and AKT/ VEGF-A and VEGF-C/ STAT3/ β-catenin/ CXCR4/ IL-6/ KDR gene expression were investigated by Real Time-PCR method. Moreover, to confirm OPN gene expression data, we investigated the effect of simvastatin and OPN siRNA as an OPN inhibitor on the cell proliferation and induction of apoptosis in the indicated cell lines. Our data display that Ara-c (2μM and 1μM in KG-1 and U937 cell lines respectively), CUR (40μM in both cell lines), and also their combination significantly increased the percentage of apoptotic cells. Moreover, the mRNA level of OPN isoforms were down regulated in the KG-1and U937 cell lines treated with Ara-c while, upregulated in KG-1and U937 cell lines treated with CUR and its combination. Our results suggest that despite anti-angiogenesis effects of CUR, AML cells probably evade from anti-angiogenesis effects of CUR via induction of OPN b and c isoform and related molecular pathways.
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Affiliation(s)
- Akram Mirzaei
- Hematology, Oncology and Stem Cell Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran.
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70
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Endothelial fibrosis induced by suppressed STAT3 expression mediated by signaling involving the TGF-β1/ALK5/Smad pathway. J Transl Med 2017; 97:1033-1046. [PMID: 28737766 DOI: 10.1038/labinvest.2017.61] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 04/21/2017] [Accepted: 04/22/2017] [Indexed: 12/22/2022] Open
Abstract
During systemic inflammatory pathologies, mediators of inflammation circulate in the bloodstream and interact with endothelial cells (ECs), resulting in endothelial dysfunction that maintains and enhances the pathological condition. Inflammatory mediators change the protein expression profile of ECs, which become activated fibroblasts via endothelial-to-mesenchymal transition. This process is characterized by downregulated endothelial proteins and strongly upregulated fibrotic-specific genes and extracellular matrix-forming proteins. The main inductor of endothelial fibrosis is transforming growth factor-β1 (TGF-β1), which acts through the TGF-β1/activin receptor-like kinase 5 (ALK5)/Smads intracellular signaling pathway. The signal transducer and activator of transcription 3 (STAT3) is also involved in fibrosis in several tissues (e.g. heart and vascular system), where STAT3 signaling decreases TGF-β1-induced responses by directly interacting with Smad proteins, suggesting that decreased STAT3 could induce TGF-β1-mediated fibrosis. However, it is unknown if suppressed STAT3 expression induces EC fibrosis through a mechanism involving the TGF-β signaling pathway. The present study evaluated the fibrotic actions of STAT3 suppression in ECs and investigated TGF-β1/ALK5/Smad4 signaling pathway participation. Suppressed STAT3 expression stimulated fibrotic conversion in ECs, as mediated by protein expression reprograming that decreased endothelial marker expression and increased fibrotic and extracellular matrix protein levels. The potential mechanism underlying these changes was dependent on TGF-β1 secretion, the ALK5 activation pathway, and Smad4 translocation into the nucleus. We conclude that suppressed STAT3 expression converts ECs into activated fibroblasts via TGF-β1/ALK5/Smad4 signaling pathway involvement.
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71
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Cutler SJ, Doecke JD, Ghazawi I, Yang J, Griffiths LR, Spring KJ, Ralph SJ, Mellick AS. Novel STAT binding elements mediate IL-6 regulation of MMP-1 and MMP-3. Sci Rep 2017; 7:8526. [PMID: 28819304 PMCID: PMC5561029 DOI: 10.1038/s41598-017-08581-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Accepted: 07/24/2017] [Indexed: 01/30/2023] Open
Abstract
Dynamic remodelling of the extracellular matrix (ECM) is a key feature of cancer progression. Enzymes that modify the ECM, such as matrix metalloproteinases (MMPs), have long been recognised as important targets of anticancer therapy. Inflammatory cytokines are known to play a key role in regulating protease expression in cancer. Here we describe the identification of gamma-activated site (GAS)-like, signal transducer and activator of transcription (STAT) binding elements (SBEs) within the proximal promoters of the MMP-1 and MMP-3 genes, which in association with AP-1 components (c-Fos or Jun), bind STAT-1 in a homodimer like complex (HDLC). We further demonstrate that MMP expression and binding of this complex to SBEs can either be enhanced by interleukin (IL)-6, or reduced by interferon gamma (IFN-γ), and that IL-6 regulation of MMPs is not STAT-3 dependent. Collectively, this data adds to existing understanding of the mechanism underlying cytokine regulation of MMP expression via STAT-1, and increases our understanding of the links between inflammation and malignancy in colon cancer.
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Affiliation(s)
- Samuel J Cutler
- School of Medical Science, Griffith Institute for Health and Medical Research, Griffith University, Parklands Drive, Southport, 4215, QLD, Australia
| | - James D Doecke
- School of Medical Science, Griffith Institute for Health and Medical Research, Griffith University, Parklands Drive, Southport, 4215, QLD, Australia
| | - Ibtisam Ghazawi
- School of Medical Science, Griffith Institute for Health and Medical Research, Griffith University, Parklands Drive, Southport, 4215, QLD, Australia
| | - Jinbo Yang
- Department of Molecular Genetics, Lerner Research Institute, 9500 Euclid Avenue, Cleveland, Ohio, 44195, USA
| | - Lyn R Griffiths
- Institute for Health & Biomedical Innovation, Queensland University of Technology, 60 Musk Avenue, Kelvin Grove, QLD 4059, Australia
| | - Kevin J Spring
- School of Medicine, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia.,Ingham Institute for Applied Medical Research, South Western Sydney Clinical School UNSW & CONCERT Translational Cancer Research Centre, 1 Campbell Street, Liverpool, NSW 2170, Australia
| | - Stephen J Ralph
- School of Medical Science, Griffith Institute for Health and Medical Research, Griffith University, Parklands Drive, Southport, 4215, QLD, Australia.
| | - Albert S Mellick
- School of Medical Science, Griffith Institute for Health and Medical Research, Griffith University, Parklands Drive, Southport, 4215, QLD, Australia. .,School of Medicine, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia. .,Ingham Institute for Applied Medical Research, South Western Sydney Clinical School UNSW & CONCERT Translational Cancer Research Centre, 1 Campbell Street, Liverpool, NSW 2170, Australia.
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72
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Lu R, Zhang YG, Sun J. STAT3 activation in infection and infection-associated cancer. Mol Cell Endocrinol 2017; 451:80-87. [PMID: 28223148 PMCID: PMC5469714 DOI: 10.1016/j.mce.2017.02.023] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 02/14/2017] [Indexed: 12/23/2022]
Abstract
The Janus kinase/signal transducers and activators for transcription (JAK/STAT) pathway plays crucial roles in regulating apoptosis, proliferation, differentiation, and the inflammatory response. The JAK/STAT families are composed of four JAK family members and seven STAT family members. STAT3 plays a key role in inducing and maintaining a pro-carcinogenic inflammatory microenvironment. Recent evidence suggests that STAT3 regulates diverse biological functions in pathogenesis of diseases, such as infection and cancer. In the current review, we will summarize the research progress of STAT3 activation in infection and cancers. We highlight our recent study on the novel role of STAT3 in Salmonella infection-associated colon cancer. Infection with bacterial AvrA-expressing Salmonella activates the STAT3 pathway, which induces the β-catenin signals and enhances colonic tumorigenesis. STAT3 may be a promising target in developing prevention and treatment for infectious diseases and infection-associated cancers.
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Affiliation(s)
- Rong Lu
- Division of Gastroenterology and Hepatology, Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Yong-Guo Zhang
- Division of Gastroenterology and Hepatology, Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Jun Sun
- Division of Gastroenterology and Hepatology, Medicine, University of Illinois at Chicago, Chicago, IL, USA.
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73
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Ishibashi K, Haber T, Breuksch I, Gebhard S, Sugino T, Kubo H, Hata J, Koguchi T, Yabe M, Kataoka M, Ogawa S, Hiraki H, Yanagida T, Haga N, Thüroff JW, Prawitt D, Brenner W, Kojima Y. Overriding TKI resistance of renal cell carcinoma by combination therapy with IL-6 receptor blockade. Oncotarget 2017; 8:55230-55245. [PMID: 28903416 PMCID: PMC5589655 DOI: 10.18632/oncotarget.19420] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 07/12/2017] [Indexed: 02/06/2023] Open
Abstract
Metastatic renal cell carcinoma (RCC) is a tumor entity with poor prognosis due to limited therapy options. Tyrosine kinase inhibitors (TKI) represent the standard of care for RCCs, however a significant proportion of RCC patients develop resistance to this therapy. Interleukin-6 (IL-6) is considered to be associated with poor prognosis in RCCs. We therefore hypothesized that TKI resistance and IL-6 secretion are causally connected. We first analyzed IL-6 expression after TKI treatment in RCC cells and RCC tumor specimens. Cell proliferation and signal transduction activity were then quantified after co-treatment with tocilizumab, an IL-6R inhibitor, in vitro and in vivo. 786-O RCC cells secrete high IL-6 levels after low dose stimulation with the TKIs sorafenib, sunitinib and pazopanib, inducing activation of AKT-mTOR pathway, NFκB, HIF-2α and VEGF expression. Tocilizumab neutralizes the AKT-mTOR pathway activation and results in reduced proliferation. Using a mouse xenograft model we can show that a combination therapy with tocilizumab and low dosage of sorafenib suppresses 786-O tumor growth, reduces AKT-mTOR pathway and inhibits angiogenesis in vivo more efficient than sorafenib alone. Furthermore FDG-PET imaging detected early decrease of maximum standardized uptake values prior to extended central necrosis. Our findings suggest that a combination therapy of IL-6R inhibitors and TKIs may represent a novel therapeutic approach for RCC treatment.
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Affiliation(s)
- Kei Ishibashi
- Department of Urology, Fukushima Medical University, Fukushima, Japan.,Department of Urology, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - Tobias Haber
- Department of Urology, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - Ines Breuksch
- Department of Gynecology and Obstetrics, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - Susanne Gebhard
- Department of Gynecology and Obstetrics, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - Takashi Sugino
- Department of Pathology, Shizuoka Cancer Center, Shizuoka, Japan
| | - Hitoshi Kubo
- Advanced Clinical Research Center, Fukushima Medical University, Fukushima, Japan
| | - Junya Hata
- Department of Urology, Fukushima Medical University, Fukushima, Japan
| | - Tomoyuki Koguchi
- Department of Urology, Fukushima Medical University, Fukushima, Japan
| | - Michihiro Yabe
- Department of Urology, Fukushima Medical University, Fukushima, Japan
| | - Masao Kataoka
- Department of Urology, Fukushima Medical University, Fukushima, Japan
| | - Soichiro Ogawa
- Department of Urology, Fukushima Medical University, Fukushima, Japan
| | - Hiroyuki Hiraki
- Department of Urology, Fukushima Medical University, Fukushima, Japan
| | - Tomohiko Yanagida
- Department of Urology, Fukushima Medical University, Fukushima, Japan
| | - Nobuhiro Haga
- Department of Urology, Fukushima Medical University, Fukushima, Japan
| | - Joachim W Thüroff
- Department of Urology, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - Dirk Prawitt
- Center for Pediatrics and Adolescent Medicine, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - Walburgis Brenner
- Department of Urology, Johannes Gutenberg University Medical Center, Mainz, Germany.,Department of Gynecology and Obstetrics, Johannes Gutenberg University Medical Center, Mainz, Germany
| | - Yoshiyuki Kojima
- Department of Urology, Fukushima Medical University, Fukushima, Japan
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74
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Mirzaei A, Mohammadi S, Ghaffari SH, Nikbakht M, Bashash D, Alimoghaddam K, Ghavamzadeh A. Osteopontin b and c isoforms: Molecular Candidates Associated with Leukemic Stem Cell Chemoresistance in Acute Myeloid
Leukemia. Asian Pac J Cancer Prev 2017; 18:1707-1715. [PMID: 28670893 PMCID: PMC6373801 DOI: 10.22034/apjcp.2017.18.6.1707] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Despite impressive advances in therapeutic approaches, long-term survival with acute myeloid leukemia (AML) is
low as a result of treatment resistance and frequent relapse. Among multitude oncogenic proteins involved in acquisition
of a chemo-resistanr phenotype, osteopontin (OPN) recently has attracted marked attention. In spite of the well-defined
association between OPN expression and cure rate with solid tumors, there is a scarcity of information on any role of this
protein in AML cases. Based on the critical role of OPN in cell survival, it seems reasonable to hypothesize that isoform
expression levels may impact on regulation of apoptosis in AML cells in response to conventional chemotherapeutic
drugs and its relation to relapse. To investigate associations between induction of apoptosis and OPN isoform expression,
two distinct AML cell lines (KG-1 as a leukemic stem cell model and U937) were treated with chemotherapy drugs,
and cell viability and apoptosis were evaluated by MTT and Annexin/PI assay. After determination of appropriate drug
doses, mRNA expression levels of OPN isoforms and OPN-related genes were investigated. Our results demonstrated
for the first time that acquired up-regulation of OPN-b and c isoforms might prevent conventional chemotherapy
regimen-induced apoptosis in AML cells. Moreover, upregulation of OPN-b and c in AML cells appears concurrent
with upregulation of AKT/VEGF/CXCR4/STAT3/ IL-6 gene expression. To sum up, this study suggests that OPN-b
and c isoforms could be considered as unique beneficial molecular biomarkers associated with leukemic stem cell
chemoresistance. Hence, they have potential as molecular candidates for detection of minimal residual disease (MRD)
and determination of remission in AML patients. Further evaluation with quantative real time PCR on patient samples
for confirmation appears warranted.
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Affiliation(s)
- Akram Mirzaei
- Hematology, Oncology and Stem Cell Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran. ,
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Guo C, Chen Y, Gao W, Chang A, Ye Y, Shen W, Luo Y, Yang S, Sun P, Xiang R, Li N. Liposomal Nanoparticles Carrying anti-IL6R Antibody to the Tumour Microenvironment Inhibit Metastasis in Two Molecular Subtypes of Breast Cancer Mouse Models. Am J Cancer Res 2017; 7:775-788. [PMID: 28255366 PMCID: PMC5327649 DOI: 10.7150/thno.17237] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 12/04/2016] [Indexed: 12/17/2022] Open
Abstract
Tumour microenvironment (TME) contributes significantly towards potentiating the stemness and metastasis properties of cancer cells. IL6-Stat3 is one of the important cell signaling pathways in mediating the communication between tumour and immune cells. Here, we have systematically developed a novel anti-CD44 antibody-mediated liposomal nanoparticle delivery system loaded with anti-IL6R antibody, which could specifically target the TME of CD44+ breast cancer cells in different mouse models for triple negative and luminal breast cancer. This nanoparticle had an enhanced and specific tumour targeting efficacy with dramatic anti-tumour metastasis effects in syngeneic BALB/c mice bearing 4T1 cells as was in the syngeneic MMTV-PyMT mice. It inhibited IL6R-Stat3 signaling and moderated the TME, characterized by the reduced expression of genes encoding Stat3, Sox2, VEGFA, MMP-9 and CD206 in the breast tissues. Furthermore, this nanoparticle reduced the subgroups of Sox2+ and CD206+ cells in the lung metastatic foci, demonstrating its inhibitory effect on the lung metastatic niche for breast cancer stem cells. Taken together, the CD44 targeted liposomal nanoparticles encapsulating anti-IL6R antibody achieved a significant effect to inhibit the metastasis of breast cancer in different molecular subtypes of breast cancer mouse models. Our results shed light on the application of nanoparticle mediated cancer immune-therapy through targeting TME.
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76
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Tumor apelin, not serum apelin, is associated with the clinical features and prognosis of gastric cancer. BMC Cancer 2016; 16:794. [PMID: 27733135 PMCID: PMC5062883 DOI: 10.1186/s12885-016-2815-y] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 09/26/2016] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND To study the association between Apelin expression and the clinical features and postoperative prognosis in patients with gastric cancer (Int J Cancer 136:2388-2401, 2015). METHODS Tumor samples and matched adjacent normal tissues were collected from 270 patients with GC receiving surgical resection. The tumor and serum Apelin levels were determined by immunohistochemistry and ELISA methods, respectively. GC cell lines were cultured for migration and invasive assays. RESULTS Our data showed that tumor Apelin expression status, instead of serum Apelin level, was closely associated with more advance clinical features including tumor differentiation, lymph node and distant metastases. Moreover, patients with high tumor Apelin level had a significantly shorter overall survival period compared to those with low Apelin expression and those with or negative Apelin staining. Our in vitro study revealed that the Apelin regulated the migration and invasion abilities of GC cell lines, accompanied by up-regulations of a variety of cytokines associated with tumor invasiveness. CONCLUSION Our data suggest that tumor Apelin can be used as a marker to evaluate clinical characteristics and predict prognosis in GC patients.
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77
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Zhang Y, Zhou GQ, Liu X, Chen L, Li WF, Tang LL, Liu Q, Sun Y, Ma J. Exploration and Validation of C-Reactive Protein/Albumin Ratio as a Novel Inflammation-Based Prognostic Marker in Nasopharyngeal Carcinoma. J Cancer 2016; 7:1406-12. [PMID: 27471556 PMCID: PMC4964124 DOI: 10.7150/jca.15401] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2016] [Accepted: 05/18/2016] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND The prognostic value of C-reactive protein/albumin ratio (CRP/Alb), a novel inflammation-based marker, remains unknown in nasopharyngeal carcinoma (NPC). METHODS We conducted a retrospective review of 1572 consecutive patients with non-metastatic NPC. Patients were randomly divided into a training set (n = 514) and validation set (n = 1058). The prognostic value of the CRP/Alb ratio and the modified Glasgow prognostic score (mGPS; a well-recognized inflammation-based score) was assessed. RESULTS Receiver-operating characteristic analysis identified 0.05 as the optimal CRP/Alb cut-off value for disease failure in the training set. Patients with a CRP/Alb > 0.05 had poorer overall survival (OS), distant metastasis-free survival (DMFS) and disease-free survival (DFS) in the training set (all P < 0.05). These results were confirmed in the validation set (all P < 0.05) and the whole cohort (all P < 0.001). In multivariate analysis of the entire cohort, the pretreatment CRP/Alb ratio was an independent prognostic factor for OS (HR, 1.394; 95% CI, 1.004-1.937; P = 0.048) and DMFS (HR, 1.545; 95% CI, 1.124-2.122; P = 0.007), but not for DFS (P = 0.083). The mGPS had no significant independent prognostic value for any end-point. CONCLUSION CRP/Alb ratio is an useful prognostic indicator in patients with NPC, independent of disease stage.
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Affiliation(s)
- Yuan Zhang
- 1. Department of Radiation Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Canton, Guangdong Province, People's Republic of China
| | - Guan-Qun Zhou
- 1. Department of Radiation Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Canton, Guangdong Province, People's Republic of China
| | - Xu Liu
- 1. Department of Radiation Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Canton, Guangdong Province, People's Republic of China
| | - Lei Chen
- 1. Department of Radiation Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Canton, Guangdong Province, People's Republic of China
| | - Wen-Fei Li
- 1. Department of Radiation Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Canton, Guangdong Province, People's Republic of China
| | - Ling-Long Tang
- 1. Department of Radiation Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Canton, Guangdong Province, People's Republic of China
| | - Qing Liu
- 2. Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, Canton, People's Republic of China
| | - Ying Sun
- 1. Department of Radiation Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Canton, Guangdong Province, People's Republic of China
| | - Jun Ma
- 1. Department of Radiation Oncology, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Canton, Guangdong Province, People's Republic of China
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