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Feng K, Liu C, Wang W, Kong P, Tao Z, Liu W. Emerging proteins involved in castration‑resistant prostate cancer via the AR‑dependent and AR‑independent pathways (Review). Int J Oncol 2023; 63:127. [PMID: 37732538 PMCID: PMC10609492 DOI: 10.3892/ijo.2023.5575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 09/06/2023] [Indexed: 09/22/2023] Open
Abstract
Despite achieving optimal initial responses to androgen deprivation therapy, most patients with prostate cancer eventually progress to a poor prognosis state known as castration‑resistant prostate cancer (CRPC). Currently, there is a notable absence of reliable early warning biomarkers and effective treatment strategies for these patients. Although androgen receptor (AR)‑independent pathways have been discovered and acknowledged in recent years, the AR signaling pathway continues to play a pivotal role in the progression of CRPC. The present review focuses on newly identified proteins within human CRPC tissues. These proteins encompass both those involved in AR‑dependent and AR‑independent pathways. Specifically, the present review provides an in‑depth summary and analysis of the emerging proteins within AR bypass pathways. Furthermore, the significance of these proteins as potential biomarkers and therapeutic targets for treating CRPC is discussed. Therefore, the present review offers valuable theoretical insights and clinical perspectives to comprehensively enhance the understanding of CRPC.
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Affiliation(s)
- Kangle Feng
- Department of Blood Transfusion, Shaoxing Central Hospital, Shaoxing, Zhejiang 312030, P.R. China
- Department of Laboratory Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, P.R. China
| | - Chunhua Liu
- Department of Blood Transfusion, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, P.R. China
| | - Weixi Wang
- Department of Laboratory Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, P.R. China
| | - Piaoping Kong
- Department of Laboratory Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, P.R. China
| | - Zhihua Tao
- Department of Laboratory Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, P.R. China
| | - Weiwei Liu
- Department of Laboratory Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang 310009, P.R. China
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2
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Bian Q, Li B, Zhang L, Sun Y, Zhao Z, Ding Y, Yu H. Molecular pathogenesis, mechanism and therapy of Cav1 in prostate cancer. Discov Oncol 2023; 14:196. [PMID: 37910338 PMCID: PMC10620365 DOI: 10.1007/s12672-023-00813-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 10/25/2023] [Indexed: 11/03/2023] Open
Abstract
Prostate cancer is the second incidence of malignant tumors in men worldwide. Its incidence and mortality are increasing year by year. Enhanced expression of Cav1 in prostate cancer has been linked to both proliferation and metastasis of cancer cells, influencing disease progression. Dysregulation of the Cav1 gene shows a notable association with prostate cancer. Nevertheless, there is no systematic review to report about molecular signal mechanism of Cav1 and drug treatment in prostate cancer. This article reviews the structure, physiological and pathological functions of Cav1, the pathogenic signaling pathways involved in prostate cancer, and the current drug treatment of prostate cancer. Cav1 mainly affects the occurrence of prostate cancer through AKT/mTOR, H-RAS/PLCε, CD147/MMPs and other pathways, as well as substance metabolism including lipid metabolism and aerobic glycolysis. Baicalein, simvastatin, triptolide and other drugs can effectively inhibit the growth of prostate cancer. As a biomarker of prostate cancer, Cav1 may provide a potential therapeutic target for the treatment of prostate cancer.
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Affiliation(s)
- Qiang Bian
- Department of Pathophysiology, Weifang Medicine University, Weifang, 261053, Shandong, People's Republic of China
- Department of Biochemistry, Jining Medical University, Jining, 272067, Shandong, People's Republic of China
- The Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, 272100, Shandong, People's Republic of China
| | - Bei Li
- Department of Radiological Image, Zhengzhou University People's Hospital, Zhengzhou, 450003, Henan, People's Republic of China
| | - Luting Zhang
- Department of Biochemistry, Jining Medical University, Jining, 272067, Shandong, People's Republic of China
| | - Yinuo Sun
- Department of Biochemistry, Jining Medical University, Jining, 272067, Shandong, People's Republic of China
| | - Zhankui Zhao
- The Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, 272100, Shandong, People's Republic of China
| | - Yi Ding
- Department of Pathophysiology, Weifang Medicine University, Weifang, 261053, Shandong, People's Republic of China.
| | - Honglian Yu
- Department of Biochemistry, Jining Medical University, Jining, 272067, Shandong, People's Republic of China.
- The Affiliated Hospital of Jining Medical University, Jining Medical University, Jining, 272100, Shandong, People's Republic of China.
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3
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Wang Y, Li Y, Zhong J, Li M, Zhou Y, Lin Q, Zong S, Luo W, Wang J, Wang K, Wang J, Xiong L. Tumor-derived Cav-1 promotes pre-metastatic niche formation and lung metastasis in breast cancer. Theranostics 2023; 13:1684-1697. [PMID: 37056561 PMCID: PMC10086203 DOI: 10.7150/thno.79250] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Accepted: 03/04/2023] [Indexed: 04/15/2023] Open
Abstract
Rationale: Breast cancer (BC), as one of the most frequently diagnosed cancer, has a poor prognosis due to the development of distant metastasis. Among the BC metastatic sites, lung is one of the most common sites. Caveolin-1 (Cav-1) is a functional membrane protein that plays a vital role in tumor metastasis. Although studies have revealed that Cav-1 levels were elevated in patients with advanced cancer, whether Cav-1 affects BC lung metastasis by influencing the formation of pre-metastatic niche (PMN) through exosomes has not been explored. Methods: Differential ultracentrifugation, transmission electron microscopy and nanoparticle tracking analysis were used to verify the presence of exosomes. Transwell assays were used to examine the biological effects of exosomes containing Cav-1. Both in vitro cell cultures and mammary tumor cell-induced mouse models were used to assess the lung metastasis. The regulatory mechanisms of PMN formation were revealed using western blot, flow cytometry, RT-qPCR, immunofluorescence assays, gene overexpression assays and RNA interference assays. Results: Exosomes have critical functions in transporting Cav-1 between primary BC and metastatic organ microenvironments. Cav-1 in BC-derived exosomes can act as a signaling molecule to mediate intercellular communication and regulate the PMN before lung metastasis by regulating the expression of PMN marker genes and inflammatory chemokines in lung epithelial cells, promoting the secretion of tenascin-C (TnC) in lung fibroblasts to cause extracellular matrix (ECM) deposition, and inhibiting the PTEN/CCL2/VEGF-A signaling pathway in lung macrophages to facilitate their M2-type polarization and angiogenesis. Conclusion: Our study investigated the mechanisms of lung PMN formation induced by Cav-1 in BC-derived exosomes. Our data may provide new directions for exploring the mechanisms and developing treatment strategies of BC lung metastasis.
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Affiliation(s)
- Yi Wang
- Department of Pathophysiology, Medical College, Nanchang University, 461 Bayi Road, Nanchang 330006, China
| | - Yuqiu Li
- Department of Pathophysiology, Medical College, Nanchang University, 461 Bayi Road, Nanchang 330006, China
- Queen Mary college, Nanchang University, Nanchang 330006, China
| | - Junpei Zhong
- Department of Pathophysiology, Medical College, Nanchang University, 461 Bayi Road, Nanchang 330006, China
| | - Miao Li
- Second Clinical Medical College, Nanchang University, Nanchang 330006, China
| | - Youjia Zhou
- Department of Pathophysiology, Medical College, Nanchang University, 461 Bayi Road, Nanchang 330006, China
| | - Qing Lin
- Department of Pathophysiology, Medical College, Nanchang University, 461 Bayi Road, Nanchang 330006, China
| | - Siwen Zong
- Second Clinical Medical College, Nanchang University, Nanchang 330006, China
| | - Wenting Luo
- Second Clinical Medical College, Nanchang University, Nanchang 330006, China
| | - Jiayang Wang
- First Clinical Medical College, Nanchang University, Nanchang 330006, China
| | - Keqin Wang
- First Clinical Medical College, Nanchang University, Nanchang 330006, China
| | - Jie Wang
- Key laboratory of functional and clinical translational medicine, Xiamen Medical College, Fujian province university, Xiamen 361023, China
| | - Lixia Xiong
- Department of Pathophysiology, Medical College, Nanchang University, 461 Bayi Road, Nanchang 330006, China
- Key laboratory of functional and clinical translational medicine, Xiamen Medical College, Fujian province university, Xiamen 361023, China
- ✉ Corresponding author: Lixia Xiong
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4
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Mariano R, Tavares KL, Panhoca R, Sadi M. Influence of statins in metastatic castration-resistant prostate cancer patients treated with new antiandrogen therapies: a systematic review and meta-analysis. EINSTEIN-SAO PAULO 2022; 20:eRW6339. [PMID: 35384986 PMCID: PMC8967314 DOI: 10.31744/einstein_journal/2022rw6339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 04/24/2021] [Indexed: 11/05/2022] Open
Abstract
Objective To evaluate whether the addition of statins to the new antiandrogens (enzalutamide or abiraterone) affects overall survival in patients with metastatic castration-resistant prostate cancer. Methods We searched studies in English language including the keywords statins, overall survival, and metastatic castration-resistant prostate cancer, at PubMed® (MEDLINE®), Embase and Cochrane databases. Results A total of 195 articles were initially identified, but only four met the inclusion criteria and were selected for the meta-analysis. A total of 955 patients, 632 on the new antiandrogens only group, and 323 on the new antiandrogens + statins group, were analyzed. In all four studies the combination therapy (new antiandrogens + statin) was well tolerated, regardless of which new antiandrogens were used. Neither the type of statin nor the doses and duration of use were well specified in the studies. The combination therapy in metastatic castration-resistant prostate cancer was associated with an overall survival improvement, and a 46% reduction in death (hazard ratio of 0.54; 95%CI 0.34-0.87; p<0.01) in multivariate analysis. Conclusion There seems to be a clinical benefit with the association of statins to the new antiandrogens in patients with metastatic castration-resistant prostate cancer, suggesting longer overall survival with no important collateral effect. However, due to fragility of the studies available in the literature, we are not yet capable of recommending this combination of drugs in the clinical practice. Further randomized prospective studies are warranted to confirm these beneficial outcomes.
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Affiliation(s)
| | - Kevin Lima Tavares
- Hospital do Servidor Púbico Estadual "Francisco Morato de Oliveira", São Paulo, SP, Brazil
| | - Renato Panhoca
- Hospital do Servidor Púbico Estadual "Francisco Morato de Oliveira", São Paulo, SP, Brazil
| | - Marcus Sadi
- Universidade de São Paulo, São Paulo, SP, Brazil
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Low JY, Laiho M. Caveolae-Associated Molecules, Tumor Stroma, and Cancer Drug Resistance: Current Findings and Future Perspectives. Cancers (Basel) 2022; 14:cancers14030589. [PMID: 35158857 PMCID: PMC8833326 DOI: 10.3390/cancers14030589] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/21/2022] [Accepted: 01/22/2022] [Indexed: 02/04/2023] Open
Abstract
Simple Summary Cell membranes contain small invaginations called caveolae. They are a specialized lipid domain and orchestrate cellular signaling events, mechanoprotection, and lipid homeostasis. Formation of the caveolae depends on two classes of proteins, the caveolins and cavins, which form large complexes that allow their self-assembly into caveolae. Loss of either of these two proteins leads to distortion of the caveolae structure and disruption of many physiological processes that affect diseases of the muscle, metabolic states governing lipids, and the glucose balance as well as cancers. In cancers, the expression of caveolins and cavins is heterogenous, and they undergo alterations both in the tumors and the surrounding tumor microenvironment stromal cells. Remarkably, their expression and function has been associated with resistance to many cancer drugs. Here, we summarize the current knowledge of the resistance mechanisms and how this knowledge could be applied into the clinic in future. Abstract The discovery of small, “cave-like” invaginations at the plasma membrane, called caveola, has opened up a new and exciting research area in health and diseases revolving around this cellular ultrastructure. Caveolae are rich in cholesterol and orchestrate cellular signaling events. Within caveola, the caveola-associated proteins, caveolins and cavins, are critical components for the formation of these lipid rafts, their dynamics, and cellular pathophysiology. Their alterations underlie human diseases such as lipodystrophy, muscular dystrophy, cardiovascular disease, and diabetes. The expression of caveolins and cavins is modulated in tumors and in tumor stroma, and their alterations are connected with cancer progression and treatment resistance. To date, although substantial breakthroughs in cancer drug development have been made, drug resistance remains a problem leading to treatment failures and challenging translation and bench-to-bedside research. Here, we summarize the current progress in understanding cancer drug resistance in the context of caveola-associated molecules and tumor stroma and discuss how we can potentially design therapeutic avenues to target these molecules in order to overcome treatment resistance.
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Affiliation(s)
- Jin-Yih Low
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA;
- Correspondence: ; Tel.: +1-410-502-9748; Fax: +1-410-502-2821
| | - Marikki Laiho
- Department of Radiation Oncology and Molecular Radiation Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA;
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
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Abstract
Caveolin-1 (CAV1) is commonly considered to function as a cell surface protein, for instance in the genesis of caveolae. Nonetheless, it is also present in many intracellular organelles and compartments. The contributions of these intracellular pools to CAV1 function are generally less well understood, and this is also the case in the context of cancer. This review will summarize literature available on the role of CAV1 in cancer, highlighting particularly our understanding of the canonical (CAV1 in the plasma membrane) and non-canonical pathways (CAV1 in organelles and exosomes) linked to the dual role of the protein as a tumor suppressor and promoter of metastasis. With this in mind, we will focus on recently emerging concepts linking CAV1 function to the regulation of intracellular organelle communication within the same cell where CAV1 is expressed. However, we now know that CAV1 can be released from cells in exosomes and generate systemic effects. Thus, we will also elaborate on how CAV1 participates in intracellular communication between organelles as well as signaling between cells (non-canonical pathways) in cancer.
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Abstract
Caveolae are specialised and dynamic plasma membrane subdomains, involved in many cellular functions including endocytosis, signal transduction, mechanosensing and lipid storage, trafficking, and metabolism. Two protein families are indispensable for caveola formation and function, namely caveolins and cavins. Mutations of genes encoding these caveolar proteins cause serious pathological conditions such as cardiomyopathies, skeletal muscle diseases, and lipodystrophies. Deregulation of caveola-forming protein expression is associated with many types of cancers including prostate cancer. The distinct function of secretion of the prostatic fluid, and the unique metabolic phenotype of prostate cells relying on lipid metabolism as a main bioenergetic pathway further suggest a significant role of caveolae and caveolar proteins in prostate malignancy. Accumulating in vitro, in vivo, and clinical evidence showed the association of caveolin-1 with prostate cancer grade, stage, metastasis, and drug resistance. In contrast, cavin-1 was found to exhibit tumour suppressive roles. Studies on prostate cancer were the first to show the distinct function of the caveolar proteins depending on their localisation within the caveolar compartment or as cytoplasmic or secreted proteins. In this review, we summarise the roles of caveola-forming proteins in prostate cancer and the potential of exploiting them as therapeutic targets or biological markers.
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8
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Pereira PMR, Mandleywala K, Ragupathi A, Lewis JS. Acute Statin Treatment Improves Antibody Accumulation in EGFR- and PSMA-Expressing Tumors. Clin Cancer Res 2020; 26:6215-6229. [PMID: 32998959 DOI: 10.1158/1078-0432.ccr-20-1960] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 08/20/2020] [Accepted: 09/24/2020] [Indexed: 02/07/2023]
Abstract
PURPOSE Statins are cholesterol-depleting drugs used to treat patients with hypercholesterolemia. Preclinically, statins disrupt trafficking of receptors present at the cell membrane. Membrane receptors, defined as tumor biomarkers and therapeutic targets, are often internalized by an endocytic pathway. Indeed, receptor endocytosis and recycling are dynamic mechanisms that often affect receptor density at the cell surface. In therapies using monoclonal antibodies (mAb), a downregulation in receptor density at the cell surface decreases antibody binding to the extracellular domain of the membrane receptor. Here, we determined the potential of lovastatin, simvastatin, and rosuvastatin in preclinically modulating epidermal growth factor receptor (EGFR) and prostate-specific membrane antigen (PSMA) receptor density at the tumor cell surface. EXPERIMENTAL DESIGN Small-animal PET was used to study the binding of 89Zr-labeled antibodies in ectopic xenografts. Ex vivo analyses were performed to determine changes in endocytic proteins, EGFR, and PSMA surface levels. RESULTS Acute statin treatment using lovastatin, simvastatin, or rosuvastatin enhanced tumors' avidity for the mAbs panitumumab, cetuximab, and huJ591. Statins temporarily modulated caveolin-1, cavin-1, endophilin, clathrin, and dynamin proteins in EGFR- and PSMA-overexpressing xenografts. CONCLUSIONS These data show the potential of statins as pharmacologic modulators of endocytic proteins for improved tumors' accumulation of mAbs. The translational significance of these findings lies in the potential of statins to temporarily modulate the heterogeneous presence of receptors at the cell membrane, a characteristic often associated with poor response in tumors to therapeutic antibodies.
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Affiliation(s)
- Patrícia M R Pereira
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York.
| | - Komal Mandleywala
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Ashwin Ragupathi
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Jason S Lewis
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York. .,Molecular Pharmacology Program, Memorial Sloan Kettering Cancer Center, New York, New York.,Department of Pharmacology, Weill Cornell Medical College, New York, New York.,Department of Radiology, Weill Cornell Medical College, New York, New York.,Radiochemistry and Molecular Imaging Probes Core, Memorial Sloan Kettering Cancer Center, New York, New York
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9
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Zheng Y, Jin J, Gao Y, Luo C, Wu X, Liu J. Phospholipase Cε Regulates Prostate Cancer Lipid Metabolism and Proliferation by Targeting AMP-Activated Protein Kinase (AMPK)/Sterol Regulatory Element-Binding Protein 1 (SREBP-1) Signaling Pathway. Med Sci Monit 2020; 26:e924328. [PMID: 32696762 PMCID: PMC7392057 DOI: 10.12659/msm.924328] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Metabolic reprogramming is a common characteristic of numerous kinds of tumors, including prostate cancer (PCa). Tumor metabolism such as lipid metabolism provides sufficient lipids for tumor cell division and rapid growing as well as a vital source for formation of new cellular membranes. Phospholipase Cε (PLCε) is an oncogene that can drive proliferation, progression, and lipid metabolism of tumors, but its effect in lipid metabolism of PCa is not clear. MATERIAL AND METHODS Benign prostatic hyperplasia (BPH) and PCa tissue specimens were assessed for SREBP-1, FASN, and PLCε by immunohistochemistry, and PLCε was knocked-down by a lentiviral short hairpin RNA. The mRNA and protein level expression of related factors were tested by qPCR and Western blot analyses. Cell proliferation was assessed by clone formation, CCK-8, and Ki-67 assays. Nile red and oil red O staining were performed to detect endogenous lipid levels. Immunofluorescence was used to localize the protein of SREBP-1. Finally, a tumor xenograft assay of nude mice was performed to assess the role of PLCε in prostate tumor generation. RESULTS We found that overexpression of PLCε indicates low PFS in PCa and is involved in metastasis of PCa, and that the PLCε/AMPK/SREBP-1 signaling network promotes the progression of PCa through lipid metabolism in vivo and in vitro. CONCLUSIONS This study is the first to discover the lethal role of PLCε in lipid metabolism and malignant behavior of PCa, elucidation PCa occurrence and progression.
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Affiliation(s)
- Yongbo Zheng
- Department of Urology Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China (mainland)
| | - Jiajia Jin
- Chongqing University Cancer Hospital, Chongqing, China (mainland)
| | - Yingying Gao
- Department of Laboratory Diagnosis, Jiamusi University, Jiamusi, Heilongjiang, China (mainland)
| | - Chunli Luo
- College of Laboratory Medicine, Chongqing Medical University, Chongqing, China (mainland)
| | - Xiaohou Wu
- Department of Urology Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China (mainland)
| | - Jiayu Liu
- Department of Urology Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China (mainland)
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10
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Gao Y, Xu H, Li N, Wang H, Ma L, Chen S, Liu J, Zheng Y, Zhang Y. Renal cancer-derived exosomes induce tumor immune tolerance by MDSCs-mediated antigen-specific immunosuppression. Cell Commun Signal 2020; 18:106. [PMID: 32641056 PMCID: PMC7341585 DOI: 10.1186/s12964-020-00611-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 06/08/2020] [Indexed: 12/15/2022] Open
Abstract
Backgound Although Myeloid-derived suppressor cells (MDSCs) have a prominent ability to suppress the immune responses of T lymphocytes and propel tumor immune escape, a lack of profound systemic immunesuppression in tumor-bearing mice and tumor patients. The underlying mechanism of these remains unclear. Methods For this purpose, renal cancer-derived exosomes (RDEs) were first labeled with PKH67 and been observed the internalization by MDSCs. Flow cytometry analysis showed the proportion and activity change of MDSCs in spleen and bone marrow induced by RDEs. Further, western blot experiments were used to verify triggered mechanism of MDSCs by RDEs. Finally, proliferation and cytotoxicity of cytotoxic T lymphocytes (CTLs) co-cultured with MDSCs in vitro and a series of experiments in vivo were performed to demonstrate the specific inhibitory effect of RDEs-induced MDSCs. Results This study suggested that RDEs crucially contributed to presenting antigenic information, activating and driving specific immunosuppressive effect to MDSCs. HSP70, which is highly expressed in RDEs, initiate this process in a toll like receptor 2 (TLR2)-dependent manner. Importantly, RDEs-induced MDSCs could exert an antigen-specific immunosuppression effect on CTL and specific promote renal tumors-growth and immune escape in consequence. Conclusion The immunosuppression mediated by MDSCs which is induced by RDEs is antigen-specific. HSP70, which is highly expressed in RDEs, plays a pivotal role in this process. Targeted abrogating the function of MDSCs, or eliminating the expression of HSP70 in exosomes, or blocking the crosstalk between them provides a new direction and theoretical support for future immunotherapy. Video abstract
Graphical abstract ![]()
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Affiliation(s)
- Yingying Gao
- Department of Laboratory Diagnosis, Chongqing Medical University, Chongqing, 408000, China.,Department of Laboratory Diagnosis, Jiamusi University, Jiamusi, 154000, Heilongjiang, China
| | - Haoyu Xu
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, No. 1, medical college road, Yuzhong district, Chongqing, 408000, China
| | - Nan Li
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, No. 1, medical college road, Yuzhong district, Chongqing, 408000, China
| | - Hexi Wang
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, No. 1, medical college road, Yuzhong district, Chongqing, 408000, China
| | - Lei Ma
- Department of Laboratory Diagnosis, The First Affiliated Hospital of Jiamusi University, Jiamusi, 154000, Heilongjiang, China
| | - Shiyou Chen
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, No. 1, medical college road, Yuzhong district, Chongqing, 408000, China
| | - Jiayu Liu
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, No. 1, medical college road, Yuzhong district, Chongqing, 408000, China
| | - Yongbo Zheng
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, No. 1, medical college road, Yuzhong district, Chongqing, 408000, China
| | - Yao Zhang
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, No. 1, medical college road, Yuzhong district, Chongqing, 408000, China.
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11
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Knockdown of MSI2 inhibits metastasis by interacting with caveolin-1 and inhibiting its ubiquitylation in human NF1-MPNST cells. Cell Death Dis 2020; 11:489. [PMID: 32606289 PMCID: PMC7326958 DOI: 10.1038/s41419-020-2703-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/17/2020] [Accepted: 06/17/2020] [Indexed: 01/03/2023]
Abstract
Malignant peripheral nerve sheath tumours (MPNSTs) are highly aggressive Schwann cell-derived sarcomas, and they are either associated with neurofibromatosis type 1 (NF1) or sporadic. Our previous study found that high mobility group protein A2 (HMGA2) regulates NF1-MPNST growth through Musashi-2 (MSI2); however, whether MSI2 regulates MPNST metastasis and what the mechanism is remain unclear. Here, we demonstrated that the protein caveolin-1 (CAV1) directly interacts with MSI2 in human NF1-MPNST cells. Moreover, we discovered that knockdown of MSI2 induces CAV1 protein expression by inhibiting its ubiquitylation level in NF1-MPNSTs. In addition, CAV1 mediates the suppressive function of MSI2 in epithelial-mesenchymal transition, migration and invasion in vitro and metastasis in vivo. These results help to reveal the potential mechanisms of MSI2 as a target of antimetastatic treatment for human NF1-MPNST.
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12
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Liu J, Zheng Y, Gao Y, Quan Z, Qiao B, Li L, Li T, Duan L, Yang J, Luo C, Wu X. Inhibitor 9 Combined With Androgen Deprivation Therapy or Chemotherapy Delays the Malignant Behavior of Castration-Resistant Prostate Cancer Through K-Ras/PLCε/PKCε Signaling Pathway. Front Oncol 2020; 10:75. [PMID: 32158687 PMCID: PMC7051985 DOI: 10.3389/fonc.2020.00075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Accepted: 01/15/2020] [Indexed: 12/12/2022] Open
Abstract
Castration-resistant prostate cancer (CRPC) is a progressed stage of prostate cancer, which requires better understanding of the mechanisms and remains an unmet clinical need. As a common oncogene, K-Ras is associated with malignant behavior in different types of tumors but its role in CRPC is unknown. The present study aims to find the mechanism of K-Ras in CRPC and whether it can be used as a crucial molecule for the treatment of CRPC. For this purpose, tissue samples from primary prostate cancer (PPC) and CRPC patients were analyzed by immunohistochemistry and the data showed that K-Ras was elevated in CRPC. More importantly, higher K-Ras expression was related to a shorter recurrence-free survival time in patients with CRPC. In addition, K-Ras promoted the invasion, migration, and drug resistance of CRPC cells by activation of PLCε/PKCε signaling pathway. Meanwhile, the inhibitor of K-RasG12C mutants was able to inhibit malignant behavior of CRPC cells in vitro and in vivo. Inhibitors of K-RasG12C mutants have entered clinical trials. Taken together, the study shows that K-Ras may activate PKCε through PLCε, resulting in the alterations of malignant behavior of CRPC. Inhibitor 9, an inhibitor of the K-RasG12C mutant, has a strong anti-tumor effect in CRPC, which potentially suggests that inhibitors of this nature may serve as a promising treatment for CRPC.
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Affiliation(s)
- Jiayu Liu
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yongbo Zheng
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yingying Gao
- Department of Laboratory Diagnosis, Chongqing Medical University, Chongqing, China.,Department of Laboratory Diagnosis, Clinical Medical College, Jiamusi University, Heilongjiang, China
| | - Zhen Quan
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Bo Qiao
- Department of Orthopaedics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Luo Li
- Department of Laboratory Diagnosis, Chongqing Medical University, Chongqing, China.,Department of Laboratory Diagnosis, Chongqing Public Health Medical Treatment Center, Chongqing, China
| | - Ting Li
- Department of Laboratory Diagnosis, Chongqing Medical University, Chongqing, China
| | - Limei Duan
- Department of Laboratory Diagnosis, Chongqing Medical University, Chongqing, China
| | - Jinxiao Yang
- Department of Laboratory Diagnosis, Chongqing Medical University, Chongqing, China
| | - Chunli Luo
- Department of Laboratory Diagnosis, Chongqing Medical University, Chongqing, China
| | - Xiaohou Wu
- Department of Urology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
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Duan LM, Liu JY, Yu CW, Fan JX, Li T, Yang JX, Zheng YB, Liu FC, He ZT, Yuan HL, Wu XH, Luo CL. PLCε knockdown prevents serine/glycine metabolism and proliferation of prostate cancer by suppressing YAP. Am J Cancer Res 2020; 10:196-210. [PMID: 32064161 PMCID: PMC7017741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 12/29/2019] [Indexed: 06/10/2023] Open
Abstract
The metabolic reprogramming is an important basis for the development of many tumors, including prostate cancer (PCa). Metabolic changes in many amino acids consist of serine and glycine affect the biological behavior of them. Phospholipase C epsilon (PLCε) plays an important role as an oncogene. However, its role in regulating amino acid metabolism remains unclear. In this study, results found significantly positive correlation between PLCε and Yes-associated protein (YAP) in PCa tissues. LC-MS/MS and GC-MS results further displayed abnormally elevated levels of serine, glycine and its some downstream metabolites in the blood of PCa patients. Secondly, PLCε knockdown can inhibit serine/glycine producing and proliferation of PCa both in vivo and in vitro. Mechanistically, PLCε may affect the serine/glycine metabolism by regulating dephosphorylation and nuclear translocation of YAP. More interestingly, verteporfin (VP, a specific inhibitor of YAP) could effectively enhance the PLCε-depletion induced inhibition of serine/glycine secretion and growth. Overall, this research revealed the possibility of anomalous serine/glycine levels in the blood for the diagnosis of PCa, identified the important role of the PLCε/YAP axis in regulating serine/glycine metabolism, cell proliferation and tumor growth, and suggested the combination of VP with PLCε-depletion may provide a new idea for the treatment of PCa.
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Affiliation(s)
- Li-Mei Duan
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), School of Laboratory Medicine, Chongqing Medical UniversityChongqing 400016, China
| | - Jia-Yu Liu
- Department of Urology, The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016, China
| | - Chao-Wen Yu
- Center for Clinical Molecular Medicine, Children’s Hospital of Chongqing Medical UniversityChongqing 400014, China
| | - Jia-Xin Fan
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), School of Laboratory Medicine, Chongqing Medical UniversityChongqing 400016, China
| | - Ting Li
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), School of Laboratory Medicine, Chongqing Medical UniversityChongqing 400016, China
| | - Jin-Xiao Yang
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), School of Laboratory Medicine, Chongqing Medical UniversityChongqing 400016, China
| | - Yong-Bo Zheng
- Department of Urology, The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016, China
| | - Feng-Chun Liu
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), School of Laboratory Medicine, Chongqing Medical UniversityChongqing 400016, China
| | - Zhen-Ting He
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), School of Laboratory Medicine, Chongqing Medical UniversityChongqing 400016, China
| | - Hong-Ling Yuan
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), School of Laboratory Medicine, Chongqing Medical UniversityChongqing 400016, China
| | - Xiao-Hou Wu
- Department of Urology, The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016, China
| | - Chun-Li Luo
- Key Laboratory of Clinical Laboratory Diagnostics (Ministry of Education), School of Laboratory Medicine, Chongqing Medical UniversityChongqing 400016, China
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