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Fischer A, Masilamani AP, Schultze-Seemann S, Wolf I, Gratzke C, Fuchs H, Wolf P. Synergistic Cytotoxicity of a Toxin Targeting the Epidermal Growth Factor Receptor and the Glycosylated Triterpenoid SO1861 in Prostate Cancer. J Cancer 2023; 14:3039-3049. [PMID: 37859824 PMCID: PMC10583583 DOI: 10.7150/jca.85691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 08/01/2023] [Indexed: 10/21/2023] Open
Abstract
Treatment of advanced prostate cancer lacks specificity and curative intent. Therefore, the need for new targeted therapeutic approaches is high. In the present study, we generated the new targeted toxin EGF-PE24mutΔREDLK binding to the epidermal growth factor receptor (EGFR) on the surface of prostate cancer cells. It consists of the human epidermal growth factor (EGF) as binding domain and a de-immunized variant of Pseudomonas Exotoxin A (PE), called PE24mutΔREDLK, as toxin domain. The toxin domain contains a deletion of the C-terminal KDEL-like motif REDLK to prevent its transport from sorting endosomes via the KDEL receptor mediated pathway into the cytosol, where it can inhibit cellular protein biosynthesis and induce apoptosis. Indeed, REDLK deletion resulted in a strong decrease in cytotoxicity of the targeted toxin in prostate cancer cells compared to the parental targeted toxin EGF-PE24mut. However, addition of the plant glycosylated triterpenoid SO1861, which is known to mediate the release of biomolecules from endolysosomal compartments into the cytosol, resulted in an up to almost 7,000-fold enhanced synergistic cytotoxicity. Moreover, combination of PE24mutΔREDLK with SO1861 led to a cytotoxicity that was even 16- to 300-fold enhanced compared to that of EGF-PE24mut. Endolysosomal entrapment of the non-toxic targeted toxin EGF-PE24mutΔREDLK followed by activation through enhanced endosomal escape therefore represents a new promising approach for the future treatment of advanced prostate cancer with high efficacy and diminished side effects.
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Affiliation(s)
- Alexandra Fischer
- Department of Urology, Medical Center—University of Freiburg, Freiburg, Germany
- Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Anie Priscilla Masilamani
- Department of Urology, Medical Center—University of Freiburg, Freiburg, Germany
- Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Susanne Schultze-Seemann
- Department of Urology, Medical Center—University of Freiburg, Freiburg, Germany
- Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Isis Wolf
- Department of Urology, Medical Center—University of Freiburg, Freiburg, Germany
- Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Faculty for Biology, University of Freiburg, Freiburg, Germany
| | - Christian Gratzke
- Department of Urology, Medical Center—University of Freiburg, Freiburg, Germany
- Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Hendrik Fuchs
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin; Institute of Diagnostic Laboratory Medicine, Clinical Chemistry and Pathobiochemistry; Berlin, Germany
| | - Philipp Wolf
- Department of Urology, Medical Center—University of Freiburg, Freiburg, Germany
- Faculty of Medicine, University of Freiburg, Freiburg, Germany
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Cordier C, Haustrate A, Prevarskaya N, Lehen’kyi V. Characterization of the TRPV6 calcium channel-specific phenotype by RNA-seq in castration-resistant human prostate cancer cells. Front Genet 2023; 14:1215645. [PMID: 37576552 PMCID: PMC10415680 DOI: 10.3389/fgene.2023.1215645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 07/10/2023] [Indexed: 08/15/2023] Open
Abstract
Background: Transient receptor potential vanilloid subfamily member 6 (TRPV6), a highly calcium-selective channel, has been shown to play a significant role in calcium homeostasis and to participate both in vitro and in vivo in growth, cell survival, and drug resistance of prostate cancer. Its role and the corresponding calcium-dependent pathways were mainly studied in hormone-dependent human prostate cancer cell lines, often used as a model of early-stage prostate cancers. The goal of the present study was to describe the TRPV6-specific phenotype and signaling pathways it is involved in, using castration-resistant prostate cancer cell lines. Methods: RNA sequencing (RNA-seq) was used to study the gene expression impacted by TRPV6 using PC3Mtrpv6-/- versus PC3Mtrpv6+/+ and its derivative PC3M-luc-C6trpv6+/+ cell line in its native and TRPV6 overexpressed form. In addition to the whole-cell RNA sequencing, immunoblotting, quantitative PCR, and calcium imaging were used to validate trpv6 gene status and functional consequences, in both trpv6 -/- and TRPV6 overexpression cell lines. Results: trpv6 -/- status was validated using both immunoblotting and quantitative PCR, and the functional consequences of either trpv6 gene deletion or TRPV6 overexpression were shown using calcium imaging. RNA-seq analysis demonstrated that the calcium channel TRPV6, being a crucial player of calcium signaling, significantly impacts the expression of genes involved in cancer progression, such as cell cycle regulation, chemotaxis, migration, invasion, apoptosis, ferroptosis as well as drug resistance, and extracellular matrix (ECM) re-organization. Conclusion: Our data suggest that the trpv6 gene is involved in and regulates multiple pathways related to tumor progression and drug resistance in castration-resistant prostate cancer cells.
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Affiliation(s)
| | | | | | - V’yacheslav Lehen’kyi
- Department of Biology, Laboratory of Cell Physiology, INSERM U1003, Laboratory of Excellence Ion Channel Science and Therapeutics, Faculty of Science and Technologies, University of Lille, Villeneuve d’Ascq, France
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Transcriptomic Signature and Growth Factor Regulation of Castration-Tolerant Prostate Luminal Progenitor Cells. Cancers (Basel) 2022; 14:cancers14153775. [PMID: 35954439 PMCID: PMC9367377 DOI: 10.3390/cancers14153775] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 07/28/2022] [Indexed: 02/05/2023] Open
Abstract
Background: The molecular and cellular mechanisms that drive castration-resistant prostate cancer (CRPC) remain poorly understood. LSCmed cells defines an FACS-enriched population of castration-tolerant luminal progenitor cells that has been proposed to promote tumorigenesis and CRPC in Pten-deficient mice. The goals of this study were to assess the relevance of LSCmed cells through the analysis of their molecular proximity with luminal progenitor-like cell clusters identified by single-cell (sc)RNA-seq analyses of mouse and human prostates, and to investigate their regulation by in silico-predicted growth factors present in the prostatic microenvironment. Methods: Several bioinformatic pipelines were used for pan-transcriptomic analyses. LSCmed cells isolated by cell sorting from healthy and malignant mouse prostates were characterized using RT-qPCR, immunofluorescence and organoid assays. Results: LSCmed cells match (i) mouse luminal progenitor cell clusters identified in scRNA-seq analyses for which we provide a common 15-gene signature including the previously identified LSCmed marker Krt4, and (ii) Club/Hillock cells of the human prostate. This transcriptional overlap was maintained in cancer contexts. EGFR/ERBB4, IGF-1R and MET pathways were identified as autocrine/paracrine regulators of progenitor, proliferation and differentiation properties of LSCmed cells. The functional redundancy of these signaling pathways allows them to bypass the effect of receptor-targeted pharmacological inhibitors. Conclusions: Based on transcriptomic profile and pharmacological resistance to monotherapies that failed in CRPC patients, this study supports LSCmed cells as a relevant model to investigate the role of castration-tolerant progenitor cells in human prostate cancer progression.
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Moreira-Pais A, Nogueira-Ferreira R, Reis S, Aveiro S, Barros A, Melo T, Matos B, Duarte JA, Seixas F, Domingues P, Amado F, Fardilha M, Oliveira PA, Ferreira R, Vitorino R. Tracking Prostate Carcinogenesis over Time through Urine Proteome Profiling in an Animal Model: An Exploratory Approach. Int J Mol Sci 2022; 23:ijms23147560. [PMID: 35886909 PMCID: PMC9315930 DOI: 10.3390/ijms23147560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 06/26/2022] [Accepted: 07/06/2022] [Indexed: 01/27/2023] Open
Abstract
Prostate cancer (PCa) is one of the most lethal diseases in men, which justifies the search for new diagnostic tools. The aim of the present study was to gain new insights into the progression of prostate carcinogenesis by analyzing the urine proteome. To this end, urine from healthy animals and animals with prostate adenocarcinoma was analyzed at two time points: 27 and 54 weeks. After 54 weeks, the incidence of pre-neoplastic and neoplastic lesions in the PCa animals was 100%. GeLC-MS/MS and subsequent bioinformatics analyses revealed several proteins involved in prostate carcinogenesis. Increased levels of retinol-binding protein 4 and decreased levels of cadherin-2 appear to be characteristic of early stages of the disease, whereas increased levels of enolase-1 and T-kininogen 2 and decreased levels of isocitrate dehydrogenase 2 describe more advanced stages. With increasing age, urinary levels of clusterin and corticosteroid-binding globulin increased and neprilysin levels decreased, all of which appear to play a role in prostate hyperplasia or carcinogenesis. The present exploratory analysis can be considered as a starting point for studies targeting specific human urine proteins for early detection of age-related maladaptive changes in the prostate that may lead to cancer.
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Affiliation(s)
- Alexandra Moreira-Pais
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (A.M.-P.); (S.R.); (T.M.); (P.D.); (F.A.); (R.F.)
- Laboratory for Integrative and Translational Research in Population Health (ITR), Research Center in Physical Activity, Health and Leisure (CIAFEL), Faculty of Sports, University of Porto (FADEUP), 4200-450 Porto, Portugal;
- Centre for Research and Technology of Agro Environmental and Biological Sciences (CITAB), Inov4Agro, University of Trás-Os-Montes and Alto Douro (UTAD), Quinta de Prados, 5000-801 Vila Real, Portugal;
| | - Rita Nogueira-Ferreira
- UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine of the University of Porto, Alameda Professor Hernâni Monteiro, 4200-319 Porto, Portugal; (R.N.-F.); (A.B.)
| | - Stephanie Reis
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (A.M.-P.); (S.R.); (T.M.); (P.D.); (F.A.); (R.F.)
| | - Susana Aveiro
- GreenCoLab-Green Ocean Association, University of Algarve, 8005-139 Faro, Portugal;
| | - António Barros
- UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine of the University of Porto, Alameda Professor Hernâni Monteiro, 4200-319 Porto, Portugal; (R.N.-F.); (A.B.)
| | - Tânia Melo
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (A.M.-P.); (S.R.); (T.M.); (P.D.); (F.A.); (R.F.)
- CESAM-Centre for Environmental and Marine Studies, Department of Chemistry, Santiago University Campus, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Bárbara Matos
- Institute of Biomedicine—iBiMED, Department of Medical Sciences, University of Aveiro, 3810-193 Aveiro, Portugal; (B.M.); (M.F.)
- Cancer Biology and Epigenetics Group, IPO Porto Research Center (CI-IPOP), Portuguese Institute of Oncology of Porto (IPO Porto), 4200-072 Porto, Portugal
| | - José Alberto Duarte
- Laboratory for Integrative and Translational Research in Population Health (ITR), Research Center in Physical Activity, Health and Leisure (CIAFEL), Faculty of Sports, University of Porto (FADEUP), 4200-450 Porto, Portugal;
- TOXRUN—Toxicology Research Unit, University Institute of Health Sciences, CESPU, CRL, Avenida Central de Gandra 1317, 4585-116 Gandra, Portugal
| | - Fernanda Seixas
- Animal and Veterinary Research Center (CECAV), University of Trás-os-Montes and Alto Douro (UTAD), 5000-801 Vila Real, Portugal;
| | - Pedro Domingues
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (A.M.-P.); (S.R.); (T.M.); (P.D.); (F.A.); (R.F.)
| | - Francisco Amado
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (A.M.-P.); (S.R.); (T.M.); (P.D.); (F.A.); (R.F.)
| | - Margarida Fardilha
- Institute of Biomedicine—iBiMED, Department of Medical Sciences, University of Aveiro, 3810-193 Aveiro, Portugal; (B.M.); (M.F.)
| | - Paula A. Oliveira
- Centre for Research and Technology of Agro Environmental and Biological Sciences (CITAB), Inov4Agro, University of Trás-Os-Montes and Alto Douro (UTAD), Quinta de Prados, 5000-801 Vila Real, Portugal;
| | - Rita Ferreira
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal; (A.M.-P.); (S.R.); (T.M.); (P.D.); (F.A.); (R.F.)
| | - Rui Vitorino
- UnIC@RISE, Department of Surgery and Physiology, Faculty of Medicine of the University of Porto, Alameda Professor Hernâni Monteiro, 4200-319 Porto, Portugal; (R.N.-F.); (A.B.)
- Institute of Biomedicine—iBiMED, Department of Medical Sciences, University of Aveiro, 3810-193 Aveiro, Portugal; (B.M.); (M.F.)
- Correspondence:
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Wang Q, Tang H, Luo X, Chen J, Zhang X, Li X, Li Y, Chen Y, Xu Y, Han S. Immune-Associated Gene Signatures Serve as a Promising Biomarker of Immunotherapeutic Prognosis for Renal Clear Cell Carcinoma. Front Immunol 2022; 13:890150. [PMID: 35686121 PMCID: PMC9171405 DOI: 10.3389/fimmu.2022.890150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Accepted: 04/22/2022] [Indexed: 11/13/2022] Open
Abstract
As the most common type of renal cell carcinoma (RCC), the renal clear cell carcinoma (ccRCC) is highly malignant and insensitive to chemotherapy or radiotherapy. Although systemic immunotherapies have been successfully applied to ccRCC in recent years, screening for patients who can benefit most from these therapies is still essential and challenging due to immunological heterogeneity of ccRCC patients. To this end, we implemented a series of deep investigation on the expression and clinic data of ccRCC from The Cancer Genome Atlas (TCGA) International Consortium for Cancer Genomics (ICGC). We identified a total of 946 immune-related genes that were differentially expressed. Among them, five independent genes, including SHC1, WNT5A, NRP1, TGFA, and IL4R, were significantly associated with survival and used to construct the immune-related prognostic differential gene signature (IRPDGs). Then the ccRCC patients were categorized into high-risk and low-risk subgroups based on the median risk score of the IRPDGs. IRPDGs subgroups displays distinct genomic and immunological characteristics. Known immunotherapy-related genes show different mutation burden, wherein the mutation rate of VHL was higher than 40% in the two IRPDGs subgroups, and SETD2 and BAP1 mutations differed most between two groups with higher frequency in the high-risk subgroup. Moreover, IRPDGs subgroups had different abundance in tumor-infiltrating immune cells (TIICs) with distinct immunotherapy efficacy. Plasma cells, regulatory cells (Tregs), follicular helper T cells (Tfh), and M0 macrophages were enriched in the high-risk group with a higher tumor immune dysfunction and rejection (TIDE) score. In contrast, the low-risk group had abundant M1 macrophages, mast cell resting and dendritic cell resting infiltrates with lower TIDE score and benefited more from immune checkpoint inhibitors (ICI) treatment. Compared with other biomarkers, such as TIDE and tumor inflammatory signatures (TIS), IRPDGs demonstrated to be a better biomarker for assessing the prognosis of ccRCC and the efficacy of ICI treatment with the promise in screening precise patients for specific immunotherapies.
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Affiliation(s)
- Qi Wang
- Department of Radiation Oncology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Hanmin Tang
- Department of Radiation Oncology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Xuehui Luo
- Department of Radiation Oncology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Jie Chen
- Department of Radiation Oncology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Xinyue Zhang
- Department of Radiation Oncology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Xinyue Li
- Department of Radiation Oncology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yuesen Li
- Department of Radiation Oncology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yuetong Chen
- Department of Radiation Oncology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Yungang Xu
- Department of Cell Biology and Genetics, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, China
| | - Suxia Han
- Department of Radiation Oncology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
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AXL cooperates with EGFR to mediate neutrophil elastase-induced migration of prostate cancer cells. iScience 2021; 24:103270. [PMID: 34761189 PMCID: PMC8567381 DOI: 10.1016/j.isci.2021.103270] [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: 05/02/2021] [Revised: 06/28/2021] [Accepted: 10/12/2021] [Indexed: 01/05/2023] Open
Abstract
Neutrophil elastase (NE) promotes multiple stages of tumorigenesis. However, little is known regarding the molecular mechanisms underlying its stimulatory role. This study shows that NE triggers dose-dependent ERK signaling and cell migration in a panel of prostate cell lines representing the spectrum of prostate cell malignancy. All cell lines tested internalize NE; however, NE endocytosis is not required for ERK activation. Instead, NE acts extracellularly by stimulating the release of amphiregulin to initiate EGFR-dependent signaling. Inhibiting amphiregulin's biological activity with neutralizing antibodies, as well as gene silencing of amphiregulin or EGFR, attenuates NE-induced migration in normal and benign prostatic cells. Alternatively, in prostate cancer cells, knockdown of receptor tyrosine kinase AXL, but not EGFR, impairs both basal and NE-stimulated migration. When prostate cells progress to malignancy, the switch from EGFR-to AXL-dependence in NE-mediated migration implies the potential combined application of EGFR and AXL targeted therapy in prostate cancer treatment.
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Zhang X, Li X, Fu X, Yu M, Qin G, Chen G, Huang C. Circular RNA TAF4B Promotes Bladder Cancer Progression by Sponging miR-1298-5p and Regulating TGFA Expression. Front Oncol 2021; 11:643362. [PMID: 34322376 PMCID: PMC8312550 DOI: 10.3389/fonc.2021.643362] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 06/10/2021] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Bladder cancer (Bca) is the most common malignant tumor of the urinary system. Circular RNAs (circRNAs) have been recognized as key regulators in tumorigenesis. However, the molecular mechanisms underlying circRNAs involved in the progression of BCa remain largely unknown. METHODS We detected the expression level of circular RNA TAF4B (circTAF4B) by qRT-PCR assay. Cell proliferation was evaluated by CCK-8 and colony formation assays. Wound healing and Transwell assays were performed to measure cell migration and invasion capability. Moreover, we performed qRT-PCR and western blotting assays to determine the expression levels of epithelial-mesenchymal transition (EMT) markers. A nuclear/cytoplasmic fractionation assay was used to measure the subcellular location of circTAF4B. RNA pull-down and dual-luciferase reporter assays were used to detect the target microRNA of circTAF4B. A mouse xenograft model was produced to analyze the effect of circTAF4B on the tumorigenesis of BCa. RESULTS In this study, we identified a novel circular RNA, circTAF4B, that is significantly upregulated in BCa and correlated with poor prognosis. Downregulated circTAF4B abolished the growth, metastasis and EMT process in BCa cells. Mechanistically, we found that circTAF4B facilitated the expression of transforming growth factor A (TGFA) by sponging miR-1298-5p. Finally, circTAF4B enhanced the proliferation and EMT process of BCa cells in vivo. CONCLUSION In summary, our study demonstrated that circTAF4B played a carcinogenic role in the growth, metastasis, and EMT process of BCa by regulating the miR-1298-5p/TGFA axis. Thus, circTAF4B may become a diagnostic and therapeutic target for BCa.
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Affiliation(s)
- Xiaoting Zhang
- Shenzhen Bao’an District Songgang People’s Hospital, Shenzhen, China
| | - Xiaofeng Li
- Department of Laboratory Medicine, Peking University Shenzhen Hospital, Shenzhen, China
| | - Xian Fu
- Shenzhen Bao’an District Songgang People’s Hospital, Shenzhen, China
| | - Mengli Yu
- Shenzhen Bao’an District Songgang People’s Hospital, Shenzhen, China
| | - Guicheng Qin
- Shenzhen Bao’an District Songgang People’s Hospital, Shenzhen, China
| | - Guihong Chen
- Shenzhen Bao’an District Songgang People’s Hospital, Shenzhen, China
- School of Pharmaceutical Sciences, Guangzhou Medical University, Guangzhou, China
| | - Chenchen Huang
- Department of Urology, Peking University First Hospital, Beijing, China
- Department of Urology, Peking University Shenzhen Hospital, Shenzhen, China
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Hinz N, Jücker M. AKT in Bone Metastasis of Solid Tumors: A Comprehensive Review. Cancers (Basel) 2021; 13:cancers13102287. [PMID: 34064589 PMCID: PMC8151478 DOI: 10.3390/cancers13102287] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 05/05/2021] [Accepted: 05/07/2021] [Indexed: 02/07/2023] Open
Abstract
Simple Summary Bone metastasis is a frequent complication of solid tumors and leads to a reduced overall survival. Although much progress has been made in the field of tumor therapy in the last years, bone metastasis depicts a stage of the disease with a lack of appropriate therapeutical options. Hence, this review aims to present the role of AKT in bone metastasis of solid tumors to place the spotlight on AKT as a possible therapeutical approach for patients with bone metastases. Furthermore, we intended to discuss postulated underlying molecular mechanisms of the bone metastasis-promoting effect of AKT, especially in highly bone-metastatic breast, prostate, and lung cancer. To conclude, this review identified the AKT kinase as a potential therapeutical target in bone metastasis and revealed remaining questions, which need to be addressed in further research projects. Abstract Solid tumors, such as breast cancer and prostate cancer, often form bone metastases in the course of the disease. Patients with bone metastases frequently develop complications, such as pathological fractures or hypercalcemia and exhibit a reduced life expectancy. Thus, it is of vital importance to improve the treatment of bone metastases. A possible approach is to target signaling pathways, such as the PI3K/AKT pathway, which is frequently dysregulated in solid tumors. Therefore, we sought to review the role of the serine/threonine kinase AKT in bone metastasis. In general, activation of AKT signaling was shown to be associated with the formation of bone metastases from solid tumors. More precisely, AKT gets activated in tumor cells by a plethora of bone-derived growth factors and cytokines. Subsequently, AKT promotes the bone-metastatic capacities of tumor cells through distinct signaling pathways and secretion of bone cell-stimulating factors. Within the crosstalk between tumor and bone cells, also known as the vicious cycle, the stimulation of osteoblasts and osteoclasts also causes activation of AKT in these cells. As a consequence, bone metastasis is reduced after experimental inhibition of AKT. In summary, AKT signaling could be a promising therapeutical approach for patients with bone metastases of solid tumors.
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Fischer A, Wolf I, Fuchs H, Masilamani AP, Wolf P. Pseudomonas Exotoxin A Based Toxins Targeting Epidermal Growth Factor Receptor for the Treatment of Prostate Cancer. Toxins (Basel) 2020; 12:E753. [PMID: 33260619 PMCID: PMC7761469 DOI: 10.3390/toxins12120753] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/24/2020] [Accepted: 11/26/2020] [Indexed: 12/16/2022] Open
Abstract
The epidermal growth factor receptor (EGFR) was found to be a valuable target on prostate cancer (PCa) cells. However, EGFR inhibitors mostly failed in clinical studies with patients suffering from PCa. We therefore tested the targeted toxins EGF-PE40 and EGF-PE24mut consisting of the natural ligand EGF as binding domain and PE40, the natural toxin domain of Pseudomonas Exotoxin A, or PE24mut, the de-immunized variant thereof, as toxin domains. Both targeted toxins were expressed in the periplasm of E.coli and evoked an inhibition of protein biosynthesis in EGFR-expressing PCa cells. Concentration- and time-dependent killing of PCa cells was found with IC50 values after 48 and 72 h in the low nanomolar or picomolar range based on the induction of apoptosis. EGF-PE24mut was found to be about 11- to 120-fold less toxic than EGF-PE40. Both targeted toxins were more than 600 to 140,000-fold more cytotoxic than the EGFR inhibitor erlotinib. Due to their high and specific cytotoxicity, the EGF-based targeted toxins EGF-PE40 and EGF-PE24mut represent promising candidates for the future treatment of PCa.
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Affiliation(s)
- Alexandra Fischer
- Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.F.); (I.W.); (A.P.M.)
- Department of Urology, Antibody-Based Diagnostics and Therapies, Medical Center—University of Freiburg, Breisacher Str. 66, 79106 Freiburg, Germany
| | - Isis Wolf
- Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.F.); (I.W.); (A.P.M.)
- Department of Urology, Antibody-Based Diagnostics and Therapies, Medical Center—University of Freiburg, Breisacher Str. 66, 79106 Freiburg, Germany
| | - Hendrik Fuchs
- Institute of Laboratory Medicine, Clinical Chemistry and Pathobiochemistry, Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 13353 Berlin, Germany;
| | - Anie Priscilla Masilamani
- Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.F.); (I.W.); (A.P.M.)
- Department of Urology, Antibody-Based Diagnostics and Therapies, Medical Center—University of Freiburg, Breisacher Str. 66, 79106 Freiburg, Germany
| | - Philipp Wolf
- Faculty of Medicine, University of Freiburg, 79106 Freiburg, Germany; (A.F.); (I.W.); (A.P.M.)
- Department of Urology, Antibody-Based Diagnostics and Therapies, Medical Center—University of Freiburg, Breisacher Str. 66, 79106 Freiburg, Germany
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10
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EGFR as a stable marker of prostate cancer dissemination to bones. Br J Cancer 2020; 123:1767-1774. [PMID: 32901137 PMCID: PMC7722745 DOI: 10.1038/s41416-020-01052-8] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 07/21/2020] [Accepted: 08/06/2020] [Indexed: 12/12/2022] Open
Abstract
Background Prostate cancer (PCa) is among the most commonly diagnosed malignancies in men. Although 5-year survival in patients with localised disease reaches nearly 100%, metastatic disease still remains incurable. Therefore, there is a need for markers indicating metastatic dissemination. Methods EGFR overexpression (EGFRover) was tracked in 1039 primary tumours, circulating tumour cells from 39 d’Amico high-risk patients and metastatic samples from 21 castration-resistant PCa cases. EGFR status was compared to clinical parameters and multiple molecular factors were assessed using immunohistochemistry and gene ontology analysis. The functional aspect of EGFR was evaluated by plating PC-3 cells on soft and rigid matrices. Results EGFRover was found in 14% of primary tumours, where it was associated with shorter metastasis-free survival and was an independent indicator of worse overall survival. EGFRover correlated with a pro-migratory and pro-metastatic phenotype of tumour cells as well as rich collagen fibre content. All circulating tumour cells (detected in 13% of cases) were positive for EGFR, independent of their EMT-related phenotype. EGFRover was more prevalent in castration-resistant bone metastases (29% of patients) and supported growth of human PCa cells on rigid matrices mimicking bone stiffness. Conclusions EGFRover is a stable, EMT-independent marker of PCa disseminating to rigid organs, preferentially bones.
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Androgen receptor phosphorylation at serine 81 and serine 213 in castrate-resistant prostate cancer. Prostate Cancer Prostatic Dis 2020; 23:596-606. [PMID: 32358577 DOI: 10.1038/s41391-020-0235-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 03/31/2020] [Accepted: 04/20/2020] [Indexed: 01/09/2023]
Abstract
BACKGROUND Despite increases in diagnostics and effective treatments, over 300,000 men die from prostate cancer highlighting the need for specific and differentiating biomarkers. AR phosphorylation associates with castrate-resistance, with pARser213 promoting transcriptional activity. We hypothesise that combined pARser81 and pARser213 reduces survival and would benefit from dual-targeting androgen-dependent and Akt-driven disease. METHODS Immunohistochemistry and immunofluorescence were performed on matched hormone-naive and castrate-resistant prostate cancer samples. TempO-Seq gene profiling was analysed using DESeq2 package. LNCaP-AI cells were stimulated with DHT or EGF. WST-1 assays were performed to determine effects of Enzalutamide and BKM120 on cell viability. RESULTS Following the development of castrate-resistance, pARser81 expression reduced and pARser213 expression increased. Castrate-resistance pARser81 expression was not associated with survival but high pARser213 expression was associated with reduced survival from relapse. Combined high pARser81 and pARser213 was associated with reduced survival from relapse. pARser81 expression was induced by 10 nM DHT or 10 nM EGF and pARser213 expression was induced by treatment with 10 nM EGF in LNCaP-AI cells. Cell viability was reduced following treatment with 10 nM Enzalutamide and 10 nM BKM120. Eight genes were differentially expressed between hormone-naive and castrate-resistant tumours and twenty-five genes were differentially expressed between castrate-resistant tumours with high and low pARser213 expression. CONCLUSION Combined pARser81 and pARser213 provides a novel prognostic biomarker for castrate-resistant disease and a potential predictive and therapeutic target for prostate cancer. Further studies will be required to investigate the combined effects of targeting AR and PI3K/AKT signalling.
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12
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Rossini A, Giussani M, Ripamonti F, Aiello P, Regondi V, Balsari A, Triulzi T, Tagliabue E. Combined targeting of EGFR and HER2 against prostate cancer stem cells. Cancer Biol Ther 2020; 21:463-475. [PMID: 32089070 DOI: 10.1080/15384047.2020.1727702] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
Progression of prostate cancer has been associated with EGFR and HER2 activation and to tumor-initiating cells contribution toward chemotherapy resistance. We investigated the efficacy of a dual intervention against EGFR and HER2 to deplete the tumor-initiating cells, optimize the chemotherapy management and prevent the progression of castration-resistant prostate cancer (CRPC) cells. Using DU145, PC3, and 22Rv1 CRPC cell lines, biochemical analysis revealed activation of EGFR, HER2, MAPK, and STAT3 in DU145 and 22Rv1, and AKT and SRC in DU145 and PC-3. pSTAT3 nuclear staining was observed in DU145 xenografts and in 12 out of 14 CRPC specimens. The in vivo dual targeting of ErbB receptors with Cetuximab and Trastuzumab combined with chemotherapy caused an effective antitumor response in DU145 xenografted mice displaying STAT3 activation; conversely PC-3 bearing mice experienced tumor relapse. The potentiating of in vivo cytotoxic effect in DU145 model was accompanied by a significant decrease of prostatosphere-forming capacity assessed in vitro on residual tumor cells. Additionally, combined treatment in vitro with Cetuximab, Trastuzumab and chemotherapy negatively affected DU145 and 22Rv1 sphere formation, suggesting the critical function of ErbB receptors for tumor-initiating cells proliferation; no effect on PC-3 clonogenic potential was observed, indicating that other receptors than EGFR and HER2 may sustain PC3 tumor-initiating cells. These findings provided the preclinical evidence that the dual inhibition of EGFR and HER2 by targeting tumor-initiating cells may improve the efficacy of the current chemotherapy regimen, bringing benefits especially to castration-resistant patients with activated STAT3, and preventing disease progression.
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Affiliation(s)
- Anna Rossini
- Molecular Targeting Unit, Department of Research, Fondazione IRCCS Istituto Nazionale Dei Tumori, Milan, Italy
| | - Marta Giussani
- Molecular Targeting Unit, Department of Research, Fondazione IRCCS Istituto Nazionale Dei Tumori, Milan, Italy
| | - Francesca Ripamonti
- Molecular Targeting Unit, Department of Research, Fondazione IRCCS Istituto Nazionale Dei Tumori, Milan, Italy
| | - Piera Aiello
- Molecular Targeting Unit, Department of Research, Fondazione IRCCS Istituto Nazionale Dei Tumori, Milan, Italy
| | - Viola Regondi
- Molecular Targeting Unit, Department of Research, Fondazione IRCCS Istituto Nazionale Dei Tumori, Milan, Italy
| | - Andrea Balsari
- Molecular Targeting Unit, Department of Research, Fondazione IRCCS Istituto Nazionale Dei Tumori, Milan, Italy.,Dipartimento Di Scienze Biomediche per La Salute, Università Degli Studi Di Milano, Milan, Italy
| | - Tiziana Triulzi
- Molecular Targeting Unit, Department of Research, Fondazione IRCCS Istituto Nazionale Dei Tumori, Milan, Italy
| | - Elda Tagliabue
- Molecular Targeting Unit, Department of Research, Fondazione IRCCS Istituto Nazionale Dei Tumori, Milan, Italy
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13
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Lin HP, Ho HM, Chang CW, Yeh SD, Su YW, Tan TH, Lin WJ. DUSP22 suppresses prostate cancer proliferation by targeting the EGFR-AR axis. FASEB J 2019; 33:14653-14667. [PMID: 31693867 DOI: 10.1096/fj.201802558rr] [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] [Indexed: 01/08/2023]
Abstract
Dual-specificity phosphatases (DUSPs) regulate the activity of various downstream kinases through serine or threonine or tyrosine dephosphorylation. Loss of function and aberrant expression of DUSPs has been implicated in cancer progression and poor survival, yet the function of DUSP22 in prostate cancer (PCa) cells is not clear. Gene Expression Omnibus and cBioPortal microarray database analyses showed that DUSP22 expression was lower in PCa tissues than normal prostate tissues, and altered DUSP22 expression was associated with shorter progression-free and disease-free survival of patients with PCa. Exogenous DUSP22 expression in LNCaP, PC3, and C4-2B PCa cells inhibited cellular proliferation and colony formation, supporting a growth inhibitory role for DUSP22 in PCa cells. DUSP22 expression significantly attenuated epidermal growth factor (EGF) receptor (EGFR) and its downstream ERK1/2 signaling by dephosphorylation. However, DUSP22 failed to suppress the growth of CWR22Rv1 and DU145 cells with elevated phosphorylated (p-)ERK1/2 levels. A serine-to-alanine mutation at position 58, a potential ERK1/2-targeted phosphorylation site in DUSP22, was sufficient to suppress growth of CWR22Rv1 cells with elevated p-ERK1/2 levels, suggesting a mutually antagonistic relationship between DUSP22 and ERK1/2 dependent on phosphorylation status. We showed that DUSP22 can suppress prostate-specific antigen gene expression through phosphatase-dependent pathways, suggesting that DUSP22 is an important regulator of the androgen receptor (AR) in PCa cells. Mechanistically, DUSP22 can interact with AR as a regulatory partner and interfere with EGF-induced AR phosphorylation at Tyr534, suggesting that DUSP22 serves as a crucial suppressor of both EGFR and AR-dependent signaling in PCa cells via dephosphorylation. Our findings indicate that loss of function of DUSP22 in PCa cells leads to aberrant activation of both EGFR-ERKs and AR signaling and ultimately progression of PCa, supporting the potential for novel therapeutic design of harnessing DUSP22 in the treatment of PCa.-Lin, H.-P., Ho, H.-M., Chang, C.-W., Yeh, S.-D., Su, Y.-W., Tan, T.-H., Lin, W.-J. DUSP22 suppresses prostate cancer proliferation by targeting the EGFR-AR axis.
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Affiliation(s)
- Hsiu-Ping Lin
- Immunology Research Center, National Health Research Institutes, Zhunan, Taiwan; and
| | - Hui-Min Ho
- Immunology Research Center, National Health Research Institutes, Zhunan, Taiwan; and
| | - Cheng-Wei Chang
- Immunology Research Center, National Health Research Institutes, Zhunan, Taiwan; and
| | - Shauh-Der Yeh
- Department of Urology, Graduate Institute of Clinical Medicine, Taipei Medical University, Taipei, Taiwan
| | - Yu-Wen Su
- Immunology Research Center, National Health Research Institutes, Zhunan, Taiwan; and
| | - Tse-Hua Tan
- Immunology Research Center, National Health Research Institutes, Zhunan, Taiwan; and
| | - Wen-Jye Lin
- Immunology Research Center, National Health Research Institutes, Zhunan, Taiwan; and
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14
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Tata P, Gondaliya P, Sunkaria A, Srivastava A, Kalia K. Modulation of CD44, EGFR and RAC Pathway Genes (WAVE Complex) in Epithelial Cancers. Curr Pharm Des 2019; 25:833-848. [PMID: 30799784 DOI: 10.2174/1381612825666190222143044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 02/13/2019] [Indexed: 12/12/2022]
Abstract
Cancer hallmarks help in understanding the diversity of various neoplasms. Epithelial cancers play an immense role in the tumor biology through Epithelial-Mesenchymal Transition (EMT) process. Receptor tyrosine kinase, as well as phosphatidyl ionositol-3 kinase pathways, play an important role in the regulation of cell proliferation, survival, and differentiation during EMT. Till date, numerous studies have shown modulation in the expression profile of potential targets like CD44, EGFR, and Rac in epithelial cancers. CD44 interacts with EGFR and recruits other molecules which further activate the Rac pathway intermediates. This review mainly focused on modulation of genes like CD44, EGFR, and Rac pathway intermediates which play a crucial role in the tumor progression, metastasis, proliferation, and invasion characteristics in epithelial cancers with EMT properties. Hence, targeting Rac pathway might be a more strategically relevant approach in treating epithelial cancers.
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Affiliation(s)
- Pranathi Tata
- National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad, Palaj, Opposite Air Force Station, Gandhinagar, Gujarat-382355, India
| | - Piyush Gondaliya
- National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad, Palaj, Opposite Air Force Station, Gandhinagar, Gujarat-382355, India
| | - Aditya Sunkaria
- National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad, Palaj, Opposite Air Force Station, Gandhinagar, Gujarat-382355, India
| | - Akshay Srivastava
- National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad, Palaj, Opposite Air Force Station, Gandhinagar, Gujarat-382355, India
| | - Kiran Kalia
- National Institute of Pharmaceutical Education and Research (NIPER)-Ahmedabad, Palaj, Opposite Air Force Station, Gandhinagar, Gujarat-382355, India
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15
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Naftchali RE, Abadeh MS. A multi-layered incremental feature selection algorithm for adjuvant chemotherapy effectiveness/futileness assessment in non-small cell lung cancer. Biocybern Biomed Eng 2017. [DOI: 10.1016/j.bbe.2017.05.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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16
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Day KC, Lorenzatti Hiles G, Kozminsky M, Dawsey SJ, Paul A, Broses LJ, Shah R, Kunja LP, Hall C, Palanisamy N, Daignault-Newton S, El-Sawy L, Wilson SJ, Chou A, Ignatoski KW, Keller E, Thomas D, Nagrath S, Morgan T, Day ML. HER2 and EGFR Overexpression Support Metastatic Progression of Prostate Cancer to Bone. Cancer Res 2016; 77:74-85. [PMID: 27793843 DOI: 10.1158/0008-5472.can-16-1656] [Citation(s) in RCA: 122] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 09/22/2016] [Accepted: 10/18/2016] [Indexed: 12/21/2022]
Abstract
Activation of the EGF receptors EGFR (ErbB1) and HER2 (ErbB2) drives the progression of multiple cancer types through complex mechanisms that are still not fully understood. In this study, we report that HER2 expression is elevated in bone metastases of prostate cancer independently of gene amplification. An examination of HER2 and NF-κB receptor (RANK) coexpression revealed increased levels of both proteins in aggressive prostate tumors and metastatic deposits. Inhibiting HER2 expression in bone tumor xenografts reduced proliferation and RANK expression while maintaining EGFR expression. In examining the role of EGFR in tumor-initiating cells (TIC), we found that EGFR expression was required for primary and secondary sphere formation of prostate cancer cells. EGFR expression was also observed in circulating tumor cells (CTC) during prostate cancer metastasis. Dual inhibition of HER2 and EGFR resulted in significant inhibition of tumor xenograft growth, further supporting the significance of these receptors in prostate cancer progression. Overall, our results indicate that EGFR promotes survival of prostate TIC and CTC that metastasize to bone, whereas HER2 supports the growth of prostate cancer cells once they are established at metastatic sites. Cancer Res; 77(1); 74-85. ©2016 AACR.
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Affiliation(s)
- Kathleen C Day
- Department of Urology, University of Michigan, Ann Arbor, Michigan.,Translational Oncology Program, University of Michigan, Ann Arbor, Michigan.,Comprehensive Cancer Center, University of Michigan, Ann Arbor, Michigan
| | - Guadalupe Lorenzatti Hiles
- Department of Urology, University of Michigan, Ann Arbor, Michigan.,Translational Oncology Program, University of Michigan, Ann Arbor, Michigan.,Comprehensive Cancer Center, University of Michigan, Ann Arbor, Michigan
| | - Molly Kozminsky
- Translational Oncology Program, University of Michigan, Ann Arbor, Michigan.,Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan.,Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan
| | - Scott J Dawsey
- Department of Urology, University of Michigan, Ann Arbor, Michigan.,Translational Oncology Program, University of Michigan, Ann Arbor, Michigan.,Comprehensive Cancer Center, University of Michigan, Ann Arbor, Michigan
| | - Alyssa Paul
- Department of Urology, University of Michigan, Ann Arbor, Michigan.,Translational Oncology Program, University of Michigan, Ann Arbor, Michigan.,Comprehensive Cancer Center, University of Michigan, Ann Arbor, Michigan
| | - Luke J Broses
- Department of Urology, University of Michigan, Ann Arbor, Michigan.,Translational Oncology Program, University of Michigan, Ann Arbor, Michigan.,Comprehensive Cancer Center, University of Michigan, Ann Arbor, Michigan
| | - Rajal Shah
- Department of Urology, University of Michigan, Ann Arbor, Michigan.,Department of Pathology, University of Michigan, Ann Arbor, Michigan
| | - Lakshmi P Kunja
- Comprehensive Cancer Center, University of Michigan, Ann Arbor, Michigan.,Department of Pathology, University of Michigan, Ann Arbor, Michigan
| | - Christopher Hall
- Department of Urology, University of Michigan, Ann Arbor, Michigan.,Comprehensive Cancer Center, University of Michigan, Ann Arbor, Michigan
| | - Nallasivam Palanisamy
- Comprehensive Cancer Center, University of Michigan, Ann Arbor, Michigan.,Department of Pathology, University of Michigan, Ann Arbor, Michigan
| | | | - Layla El-Sawy
- Department of Urology, University of Michigan, Ann Arbor, Michigan.,Translational Oncology Program, University of Michigan, Ann Arbor, Michigan.,European Egyptian Pharmaceutical Industries, Alexandria, Egypt
| | - Steven James Wilson
- Department of Urology, University of Michigan, Ann Arbor, Michigan.,Translational Oncology Program, University of Michigan, Ann Arbor, Michigan.,Comprehensive Cancer Center, University of Michigan, Ann Arbor, Michigan
| | - Andrew Chou
- Department of Urology, University of Michigan, Ann Arbor, Michigan.,Translational Oncology Program, University of Michigan, Ann Arbor, Michigan.,Comprehensive Cancer Center, University of Michigan, Ann Arbor, Michigan
| | - Kathleen Woods Ignatoski
- Department of Urology, University of Michigan, Ann Arbor, Michigan.,Comprehensive Cancer Center, University of Michigan, Ann Arbor, Michigan
| | - Evan Keller
- Department of Urology, University of Michigan, Ann Arbor, Michigan.,Translational Oncology Program, University of Michigan, Ann Arbor, Michigan.,Comprehensive Cancer Center, University of Michigan, Ann Arbor, Michigan
| | - Dafydd Thomas
- Department of Pathology, University of Michigan, Ann Arbor, Michigan
| | - Sunitha Nagrath
- Translational Oncology Program, University of Michigan, Ann Arbor, Michigan.,Biointerfaces Institute, University of Michigan, Ann Arbor, Michigan.,Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan
| | - Todd Morgan
- Department of Urology, University of Michigan, Ann Arbor, Michigan.,Comprehensive Cancer Center, University of Michigan, Ann Arbor, Michigan
| | - Mark L Day
- Department of Urology, University of Michigan, Ann Arbor, Michigan. .,Translational Oncology Program, University of Michigan, Ann Arbor, Michigan.,Comprehensive Cancer Center, University of Michigan, Ann Arbor, Michigan
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17
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Chen S, Sun KX, Liu BL, Zong ZH, Zhao Y. MicroRNA-505 functions as a tumor suppressor in endometrial cancer by targeting TGF-α. Mol Cancer 2016; 15:11. [PMID: 26832151 PMCID: PMC4736705 DOI: 10.1186/s12943-016-0496-4] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Accepted: 01/27/2016] [Indexed: 02/06/2023] Open
Abstract
Background Endometrial carcinoma (EC) is one of the most lethal gynecologic cancers. Patients frequently have regional or distant metastasis at diagnosis. MicroRNAs are small non-coding RNAs that participate in numerous biological processes. Recent studies have demonstrated that miR-505 is associated with several types of cancer; however, the expression and function of miR-505 have not been investigated in EC. Methods miR-505 expression in normal endometrial tissue, endometrial carcinomas were quantified by Quantitative reverse transcription PCR. The endometrial carcinoma cell lines HEC-1B and Ishikawa were each transfected with miR-505 or scrambled mimics, after which cell phenotype and expression of relevant molecules were assayed. Dual-luciferase reporter assay and a xenograft mouse model were used to examine miR-505 and its target gene TGF-α. Results RT-PCR results demonstrated that miR-505 was significantly downregulated in human EC tissues compared to normal endometrial tissues. Besides, miR-505 expression was negatively associated with FIGO stage (stage I-II vs. III-IV), and lymph node metastasis (negative vs. positive). In vitro, overexpression of miR-505 significantly suppressed EC cell proliferation, increased apoptosis and reduced migratory and invasive activity. A miR-505 binding site was identified in the 3′ untranslated region of TGF-α mRNA (TGFA) using miRNA target-detecting software; a dual luciferase reporter assay confirmed that miR-505 directly targets and regulates TGFA. RT-PCR and Western-blotting results indicated that overexpressing miR-505 reduced the expression of TGF-α and the TGF-α-regulated proteins MMP2, MMP9, CDK2, while induced Bax and cleaved-PARP expression in EC cells. In vivo, overexpression of miR-505 reduced the tumorigenicity and inhibited the growth of xenograft tumors in a mouse model of EC. Conclusions Taken together, this study demonstrates that miR-505 acts as tumor suppressor in EC by regulating TGF-α. Electronic supplementary material The online version of this article (doi:10.1186/s12943-016-0496-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Shuo Chen
- Department of Gynecology, The First Affiliated Hospital of China Medical University, Shenyang, 110001, China
| | - Kai-Xuan Sun
- Department of Gynecology, The First Affiliated Hospital of China Medical University, Shenyang, 110001, China
| | - Bo-Liang Liu
- Department of Gynecology, The First Affiliated Hospital of China Medical University, Shenyang, 110001, China
| | - Zhi-Hong Zong
- Department of Biochemistry and Molecular Biology, College of Basic Medicine, China Medical University, Shenyang, 100013, China
| | - Yang Zhao
- Department of Gynecology, The First Affiliated Hospital of China Medical University, Shenyang, 110001, China.
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18
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Tang J, Xiao L, Cui R, Li D, Zheng X, Zhu L, Sun H, Pan Y, Du Y, Yu X. CX3CL1 increases invasiveness and metastasis by promoting epithelial-to-mesenchymal transition through the TACE/TGF-α/EGFR pathway in hypoxic androgen-independent prostate cancer cells. Oncol Rep 2015; 35:1153-62. [PMID: 26718770 DOI: 10.3892/or.2015.4470] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 11/06/2015] [Indexed: 11/05/2022] Open
Abstract
Epithelial-to-mesenchymal transition (EMT) endows cancer cells with enhanced invasive and metastatic potential during cancer progression. Fractalkine, also known as chemokine (C-X3-C motif) ligand 1 (CX3CL1), the only member recognized so far that belongs to the CX3C chemokine subfamily, was reported to participate in the molecular events that regulate cell adhesion, migration and survival of human prostate cancer cells. However, the relationship between CX3CL1 and EMT remains unknown. We treated DU145 and PC-3 cells with CX3CL1 under hypoxic conditions. The migration and invasion abilities of DU145 and PC-3 cells were detected by Transwell assays. Induction of EMT was verified by morphological changes in the DU145 and PC-3 cells and analysis of protein expression of EMT markers such as E-cadherin and vimentin. To identify the involved signaling pathway in CX3CL1-induced EMT, activation of epidermal growth factor receptor (EGFR) was measured using western blot analysis, and Slug expression was detected with or without an EGFR inhibitor prior to CX3CL1 treatment. Concentrations of soluble and total TGF-α in the CX3CL‑treated DU145 cells were detected by ELISA. Additionally, we determined the involvement of the TACE/TGF-α/EGFR pathway in CX3CL1‑induced EMT using RNA interference and specific inhibitors. CX3CL1 increased the migration and invasiveness of the DU145 and PC-3 cells, and resulted in characteristic alterations of EMT. Our results demonstrated that TACE/TGF-α/EGFR pathway activation and subsequent upregulation of Slug expression were responsible for CX3CL1‑induced EMT, and contributed to the migration and inva-sion of prostate cancer cells. Inhibition of TACE/TGF-α/EGFR signaling reversed EMT and led to reduced migration and invasion abilities of the prostate cancer cells. We provide initial evidence that CX3CL1 exposure resulted in EMT occurrence and enhancement of cell migration and invasion through a mechanism involving activation of TACE/TGF-α/EGFR signaling. These findings revealed that CX3CL1 may serve as a new target for the treatment of prostate cancer.
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Affiliation(s)
- Jiebing Tang
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Lijie Xiao
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Rongjun Cui
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Dong Li
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Xiulan Zheng
- Department of Ultrasonography, The Affiliated Tumor Hospital of Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Lijuan Zhu
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Hui Sun
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Yujia Pan
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Yandan Du
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
| | - Xiaoguang Yu
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
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19
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Firdous AB, Sharmila G, Balakrishnan S, RajaSingh P, Suganya S, Srinivasan N, Arunakaran J. Quercetin, a natural dietary flavonoid, acts as a chemopreventive agent against prostate cancer in an in vivo model by inhibiting the EGFR signaling pathway. Food Funct 2014; 5:2632-45. [PMID: 25164625 DOI: 10.1039/c4fo00255e] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Prostate cancer incidence and mortality rates have increased over the past years. The purpose of the present study was to examine the molecular mechanism underlying the chemopreventive effects of quercetin on prostate cancer in an in vivo model. Sprague-Dawley male rats were divided into four groups, Group I: vehicle control (propylene glycol), Group II: chemically induced cancer model (MNU + T); Group III: chemically induced cancer model + quercetin (200 mg per kg b.w.); Group IV: quercetin (200 mg per kg b.w.). Serum levels of quercetin were assessed by high performance liquid chromatography (HPLC). EGFR, PI3K/Akt protein levels were significantly increased in chemically induced cancer rats, which were brought back to normalcy in both DLP & VP (dorsolateral prostate & ventral prostate) by quercetin supplementation. Also, the protein expression levels of proliferating cell nuclear antigen (PCNA), N-cadherin, vimentin, and cyclin D1 exhibited a significant increase in both DLP & VP of chemically induced cancer rats. However, simultaneous quercetin supplementation significantly decreased PCNA, N-cadherin, vimentin, and cyclin D1 protein levels compared to chemically induced cancer rats. The E-cadherin expression was decreased in chemically induced cancer animals. Simultaneous quercetin supplementation prevented it. Real time PCR was used to study the mRNA expression of snail, slug and twist. Quercetin significantly decreased snail, slug, and twist mRNA levels in chemically induced cancer rats. To conclude from the present study, quercetin was effective in preventing prostate cancer progression by inhibiting the EGFR signaling pathway and by regulating cell adhesion molecules in Sprague Dawley rats.
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Affiliation(s)
- A B Firdous
- Department of Endocrinology, Dr ALM Post Graduate Institute of Basic Medical Sciences, University of Madras, Taramani, Chennai-600113, India.
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20
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QIN WEI, PAN YUJIA, ZHENG XIULAN, LI DONG, BU JINGYI, XU CHUNYAN, TANG JIEBING, CUI RONGJUN, LIN PING, YU XIAOGUANG. MicroRNA-124 regulates TGF-α-induced epithelial-mesenchymal transition in human prostate cancer cells. Int J Oncol 2014; 45:1225-31. [DOI: 10.3892/ijo.2014.2506] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Accepted: 05/23/2014] [Indexed: 11/06/2022] Open
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21
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Borghese C, Cattaruzza L, Pivetta E, Normanno N, De Luca A, Mazzucato M, Celegato M, Colombatti A, Aldinucci D. Gefitinib inhibits the cross-talk between mesenchymal stem cells and prostate cancer cells leading to tumor cell proliferation and inhibition of docetaxel activity. J Cell Biochem 2013. [PMID: 23192362 DOI: 10.1002/jcb.24456] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Increasing evidence suggests that bone marrow derived mesenchymal stem cells (BM-MSCs) are recruited into the stroma of developing tumors where they contribute to progression by enhancing tumor growth and metastasis, or by inducing anticancer-drug resistance. Prostate cancer cells secrete ligands of epidermal growth factor receptor (EGFR) and EGFR signaling could play an important role in the cross-talk between mesenchymal stem cells and prostate cancer cells. In this study, we showed that treatment of human primary MSCs with conditioned medium (CM) derived from the bone metastatic PC3 carcinoma cells (PC3-CM) resulted in: a significant activation of EGFR; increased proliferation; increased osteoblastic but decreased adipocitic differentiation; inhibition of senescence induced by serum starvation; increased CCL5 secretion. These activities were significantly inhibited in the presence of the EGFR tyrosine kinase inhibitor gefitinib. PC3-CM directly inhibited osteoclastogenesis as well as the ability of osteoblasts to induce osteoclast differentiation. The increased MSCs migration by PC3-CM and PC3 cells was partially mediated by CCL5. MSC-CM increased the formation of colonies by PC3 cells and inhibited the anti-proliferative activity of Docetaxel. Activation of EGFR expressed on MSCs by PC3-CM enhanced their capability to increase PC3 cells proliferation and to inhibit Docetaxel activity. These findings, by showing that the tumor-promoting interactions between PC3 cells and MSCs are mediated, at least in part, by EGFR, suggest a novel application of the EGFR-tyrosine kinase inhibitors in the treatment of prostate cancer.
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Affiliation(s)
- Cinzia Borghese
- Experimental Oncology 2, C.R.O. National Cancer Institute-IRCCS, Aviano, Italy
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22
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Ben Jemaa A, Sallami S, Céraline J, Oueslati R. A novel regulation of PSMA and PSA expression by Q640X AR in 22Rv1 and LNCaP prostate cancer cells. Cell Biol Int 2013; 37:464-70. [PMID: 23418075 DOI: 10.1002/cbin.10055] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Accepted: 01/22/2013] [Indexed: 01/31/2023]
Abstract
We have investigated the expression of prostate-specific membrane antigen (PSMA) and prostate-specific antigen (PSA) transcripts in androgen-dependent (LNCaP) and androgen-independent (22Rv1) prostate cancer cell lines. We also enquired whether Q640X CTE-truncated androgen receptor (AR) has an impact on transcription of mRNA for PSMA and PSA in transfected androgen-sensitive prostate cancer LNCaP cells. Wild type LNCaP, 22Rv1 prostate cancer cells, prostate stromal cells (PrSC) and LNCaP cells transfected with p-Q640X AR, p-WT AR or p-C3 empty plasmids were studied. The expression of PSMA and PSA were detected by real-time PCR after transfection for 4 and 7 days. Expression of mRNAs for PSA was sixfold greater than PSMA in wild type LNCaP cells. In contrast, the wild type androgen refractory 22Rv1 cell line reacted almost exactly the opposite way reverse to LNCaP cells, since the transcription of mRNA for PSMA almost twofold greater than PSA. Non-transfected human PrSC responded similarly to PSMA mRNA and PSA mRNA was not detected in these cells. Q640X AR transfected LNCaP cells downregulated the expression of PSMA and PSA genes after 7 days. Our results demonstrate that Q640X mutated AR may have an important regulatory role in mediating the PSMA and PSA genes expression during the progression of prostate cancer from androgen-dependence to androgen-independence. Understanding their functional properties and mechanisms by which ARs involved in regulation of PSMA and PSA expression will allow the identification of new target therapies for the treatment of hormone-resistant prostate cancer.
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Affiliation(s)
- Awatef Ben Jemaa
- Unit of Immunology and Microbiology Environmental and Carcinogenesis, Faculty of Sciences of Bizerte, University of Carthage, 7021 Zarzouna, Tunisia
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Zhang S, Wang X, Iqbal S, Wang Y, Osunkoya AO, Chen Z, Chen Z, Shin DM, Yuan H, Wang YA, Zhau HE, Chung LWK, Ritenour C, Kucuk O, Wu D. Epidermal growth factor promotes protein degradation of epithelial protein lost in neoplasm (EPLIN), a putative metastasis suppressor, during epithelial-mesenchymal transition. J Biol Chem 2013; 288:1469-79. [PMID: 23188829 PMCID: PMC3548460 DOI: 10.1074/jbc.m112.438341] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Aberrant expression of EGF receptors has been associated with hormone-refractory and metastatic prostate cancer (PCa). However, the molecular mechanism for EGF signaling in promoting PCa metastasis remains elusive. Using experimental models of PCa metastasis, we demonstrated that EGF could induce robust epithelial-mesenchymal transition (EMT) and increase invasiveness. Interestingly, EGF was found to be capable of promoting protein turnover of epithelial protein lost in neoplasm (EPLIN), a putative suppressor of EMT and tumor metastasis. Mechanistic study revealed that EGF could activate the phosphorylation, ubiquitination, and degradation of EPLIN through an extracellular signal-regulated kinase 1/2 (ERK1/2)-dependent signaling cascade. Pharmacological inhibition of the ERK1/2 pathway effectively antagonized EGF-induced EPLIN degradation. Two serine residues, i.e. serine 362 and serine 604, were identified as putative ERK1/2 phosphorylation sites in human EPLIN, whose point mutation rendered resistance to EGF-induced protein turnover. This study elucidated a novel molecular mechanism for EGF regulation of EMT and invasiveness in PCa cells, indicating that blockade of EGF signaling could be beneficial in preventing and retarding PCa metastasis at early stages.
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Affiliation(s)
- Shumin Zhang
- From the Department of Urology and Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia 30322
| | - Xu Wang
- the Department of Hematology and Medical Oncology, Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia 30322
| | - Shareen Iqbal
- From the Department of Urology and Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia 30322
| | - Yanru Wang
- From the Department of Urology and Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia 30322
| | - Adeboye O. Osunkoya
- From the Department of Urology and Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia 30322, ,the Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, Georgia 30322
| | - Zhengjia Chen
- the Department of Biostatistics and Bioinformatics, Rollins School of Public Health, Emory University, Atlanta, Georgia 30322
| | - Zhuo Chen
- the Department of Hematology and Medical Oncology, Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia 30322
| | - Dong M. Shin
- the Department of Hematology and Medical Oncology, Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia 30322
| | - Hongwei Yuan
- the Department of Pathology, The Affiliated Hospital Inner Mongolia Medical College, Hohhot, Inner Mongolia Autonomous Region 10050, China
| | | | - Haiyen E. Zhau
- the Uro-Oncology Research Program, Cedars-Sinai Medical Center, Los Angeles, California 90048
| | - Leland W. K. Chung
- the Uro-Oncology Research Program, Cedars-Sinai Medical Center, Los Angeles, California 90048
| | - Chad Ritenour
- From the Department of Urology and Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia 30322
| | - Omer Kucuk
- From the Department of Urology and Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia 30322
| | - Daqing Wu
- From the Department of Urology and Winship Cancer Institute, Emory University School of Medicine, Atlanta, Georgia 30322, , To whom correspondence should be addressed: Dept. of Urology, Emory University School of Medicine, 1365 Clifton Rd., NE., Clinic B, B5107, Atlanta, GA 30322. Tel.: 404-778-4845; E-mail:
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Cheng K, Agarwal R, Mitra S, Mills G. Rab25 Small GTPase Mediates Secretion of Tumor Necrosis Factor Receptor Superfamily Member 11b (osteoprotegerin) Protecting Cancer Cells from Effects of TRAIL. ACTA ACUST UNITED AC 2013; 4. [PMID: 25520884 PMCID: PMC4266180 DOI: 10.4172/2157-7412.1000153] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Expression of Rab25, which is located in the 1q amplicon present at high frequency in many cancer lineages, promotes cancer cell survival under multiple stress conditions. While Rab proteins play essential roles in all stages of vesicle trafficking, the functions and endogenous cargoes for Rab25 remain to be fully elucidated. Osteoprotegerin (OPG) is a secreted glycoprotein that binds the tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) thus preventing it from activating the TNF-family death receptors. In the present study, we demonstrated that Rab25 regulates OPG at both the transcription and secretion level. METHODS The effect of Rab25 on OPG expression and its effect on TRAIL-induced cell were examined in both ovarian and breast cells. Signal transduction pathways regulation of OPG expression was examined in cells using pharmacogenetic approaches. RESULTS Expression of Rab25 to levels similar to those in tumors with RAB25 amplification, increased OPG mRNA expression and secretion from ovarian and breast cancer cell lines, whereas down regulation with Rab25 specific siRNA decreased OPG secretion and sensitized cells to TRAIL-induced cell death. Critically, exogenous OPG mimicked the effects of Rab25 on cell death supporting the contention that Rab25-induced accumulation of OPG protects cancer cells from the effects of TRAIL. Rab25 cooperates with EGFR-mediated MAPK signaling to increase TRAIL production and release. Importantly, priming cells with EGFR inhibitors increased sensitivity to TRAIL-induced cells death regardless of the Rab25 background. CONCLUSION Increased OPG expression induced by Rab25 may provide a mechanistic advantage for cancer development and progression.
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Affiliation(s)
- Kw Cheng
- Department of Systems Biology, the University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - R Agarwal
- Department of Surgery & Cancer, Institute of Reproductive and Developmental Biology, Imperial College London, London, W12 0NN, UK
| | - S Mitra
- Department of Systems Biology, the University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Gb Mills
- Department of Systems Biology, the University of Texas MD Anderson Cancer Center, Houston, Texas, USA
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At the crossroads: EGFR and PTHrP signaling in cancer-mediated diseases of bone. Odontology 2012; 100:109-29. [PMID: 22684584 DOI: 10.1007/s10266-012-0070-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Accepted: 05/21/2012] [Indexed: 01/01/2023]
Abstract
The epidermal growth factor receptor is a well-established cancer therapeutic target due to its stimulation of proliferation, motility, and resistance to apoptosis. Recently, additional roles for the receptor have been identified in growth of metastases. Similar to development, metastatic spread requires signaling interactions between epithelial-derived tumor cells and mesenchymal derivatives of the microenvironment. This necessitates reactivation of developmental signaling molecules, including the hypercalcemia factor parathyroid hormone-related protein. This review covers the variations of epidermal growth factor receptor signaling in cancers that produce bone metastases, regulation of parathyroid hormone-related protein, and evidence that the two molecules drive cancer-mediated diseases of bone.
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Lin F, Lin P, Zhao D, Chen Y, Xiao L, Qin W, Li D, Chen H, Zhao B, Zou H, Zheng X, Yu X. Sox2 targets cyclinE, p27 and survivin to regulate androgen-independent human prostate cancer cell proliferation and apoptosis. Cell Prolif 2012; 45:207-16. [PMID: 22469032 DOI: 10.1111/j.1365-2184.2012.00812.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2011] [Accepted: 01/12/2012] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVES Sox2 is a major transcription factor and the transforming growth factor-α (TGF-α)/EGFR autocrine loop is a hallmark of prostate cancer progression. In this study, we have evaluated the effects and potential mechanisms of Sox2 on cell proliferation and apoptosis, and investigated effects of TGF-α on expression of Sox2 on androgen-independent human prostate cancer cells. MATERIALS AND METHODS Expression of Sox2 has been determined by RT-PCR, western blot analysis and immunocytochemistry, using RNAi and over-expression strategy to study functions of Sox2 in DU145 and PC-3 cells. Changes in level of proliferation, cell cycle and apoptosis profiles were measured by MTT, colony-forming, bromodeoxyuridine incorporation assays, cell cycle and annexin V analysis. RESULTS Sox2 was expressed in six human prostate cancer cell lines, and its inhibition reduced cell proliferation and induced apoptosis in DU145 cells. We have shown that knock-down of Sox2 inhibited G(1) to S phase transition concomitantly with down-regulation of cyclin E and up-regulation of p27 proteins. Conversely, over-expression of Sox2 led to the opposite effect in PC-3 cells but its inhibition induced apoptosis by down-regulation of survivin in DU145 cells. We also found that TGF-α up-regulated Sox2 and survivin protein expression via the EGFR/PI3K/AKT pathway. CONCLUSIONS Sox2 expression is necessary for cell proliferation and evasion of apoptosis in prostate cancer cells and TGF-α could regulate Sox2 and survivin expression by activating the EGFR/PI3K/AKT pathway.
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Affiliation(s)
- F Lin
- Department of Biochemistry and Molecular Biology, College of Basic Medical Science, Harbin Medical University, Harbin, China
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Lin P, Sun X, Feng T, Zou H, Jiang Y, Liu Z, Zhao D, Yu X. ADAM17 regulates prostate cancer cell proliferation through mediating cell cycle progression by EGFR/PI3K/AKT pathway. Mol Cell Biochem 2011; 359:235-43. [PMID: 21837402 DOI: 10.1007/s11010-011-1018-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Accepted: 07/27/2011] [Indexed: 12/22/2022]
Abstract
A disintegrin and metalloprotease 17 (ADAM17) is a transmembrane protein that can cleave membrane anchored proteins to release soluble factors and regulate important biological phenomena in cancers. In the present study, we evaluated the effects of ADAM17 on the proliferation and on the cell cycle distribution of human prostate cancer cells. Experiments were also performed to gain insights into the possible mechanism of action of ADAM17. We used over-expression and RNAi strategy to investigate the function of ADAM17 in human prostate cancer cells. Changes in rate of proliferation and cell cycle profile were measured by growth curve, Cell Counting Kit-8 (CCK-8) assay, bromodeoxyuridine (BrdU) incorporation assay and cell cycle analysis. In addition, changes in expression of associated genes and proteins were studied by semiquantitative RT-PCR, western blotting and ELISA analysis. Ectopic over-expression of ADAM17 resulted in increased cell proliferation. We also showed that ADAM17 promoted G1 to S phase transition concomitantly with upregulation of cyclin E, CDK2 and downregulation of p21 and p27 proteins. ADAM17 over-expression cells showed that more TGF-α released to the supernatant and activated the EGFR/PI3K/AKT pathway. Conversely, silencing ADAM17 led to the opposite effect. Both siRNAs knockdown of ADAM17 and blocking the EGFR/PI3K/AKT pathway using specific inhibitor caused downregulation of cyclin E, CDK2, and upregulation of p21 and p27 in prostate cancer cells. Collectively, this study demonstrates that over-expression of ADAM17 might target cyclin E, CDK2, p21, and p27 to promote prostate cancer cell proliferation through activation of the EGFR/PI3K/AKT pathway.
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Affiliation(s)
- Ping Lin
- Department of Biochemistry and Molecular Biology, College of Basic Medical Science, Harbin Medical University, Harbin, 150081, China
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Mimeault M, Batra SK. Frequent gene products and molecular pathways altered in prostate cancer- and metastasis-initiating cells and their progenies and novel promising multitargeted therapies. Mol Med 2011; 17:949-64. [PMID: 21607288 DOI: 10.2119/molmed.2011.00115] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2011] [Accepted: 05/19/2011] [Indexed: 12/14/2022] Open
Abstract
Recent gene expression profiling analyses and gain- and loss-of-function studies performed with distinct prostate cancer (PC) cell models indicated that the alterations in specific gene products and molecular pathways often occur in PC stem/progenitor cells and their progenies during prostate carcinogenesis and metastases at distant sites, including bones. Particularly, the sustained activation of epidermal growth factor receptor (EGFR), hedgehog, Wnt/β-catenin, Notch, hyaluronan (HA)/CD44 and stromal cell-derived factor-1 (SDF-1)/CXC chemokine receptor 4 (CXCR4) during the epithelial-mesenchymal transition (EMT) process may provide critical functions for PC progression to locally invasive, metastatic and androgen-independent disease states and treatment resistance. Moreover, an enhanced glycolytic metabolism in PC stem/progenitor cells and their progenies concomitant with the changes in their local microenvironment, including the induction of tumor hypoxia and release of diverse soluble factors by tumor myofibroblasts, also may promote the tumor growth, angiogenesis and metastases. More particularly, these molecular transforming events may cooperate to upregulate Akt, nuclear factor (NF)-κB, hypoxia-inducible factors (HIFs) and stemness gene products such as Oct3/4, Sox2, Nanog and Bmi-1 in PC cells that contribute to their acquisition of high self-renewal, tumorigenic and invasive capacities and survival advantages during PC progression. Consequently, the molecular targeting of these deregulated gene products in the PC- and metastasis-initiating cells and their progenies represent new promising therapeutic strategies of great clinical interest for eradicating the total PC cell mass and improving current antihormonal treatments and docetaxel-based chemotherapies, thereby preventing disease relapse and the death of PC patients.
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Affiliation(s)
- Murielle Mimeault
- Department of Biochemistry and Molecular Biology, College of Medicine, Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, Nebraska, USA
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Combined targeting of the VEGFr/EGFr and the mammalian target of rapamycin (mTOR) signaling pathway delays cell cycle progression and alters adhesion behavior of prostate carcinoma cells. Cancer Lett 2011; 301:17-28. [DOI: 10.1016/j.canlet.2010.11.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2010] [Revised: 11/04/2010] [Accepted: 11/07/2010] [Indexed: 01/08/2023]
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Yoshio Y, Ishii K, Arase S, Hori Y, Nishikawa K, Soga N, Kise H, Arima K, Sugimura Y. Effect of transforming growth factor α overexpression on urogenital organ development in mouse. Differentiation 2010; 80:82-8. [PMID: 20638776 DOI: 10.1016/j.diff.2010.06.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2010] [Revised: 06/25/2010] [Accepted: 06/29/2010] [Indexed: 10/19/2022]
Abstract
Transforming growth factor-α (TGFα) promotes cell proliferation by binding to the epidermal growth factor receptor (EGFR). TGFα and EGFR overexpression have been reported in various human cancers. However, whether TGFα induces cancer by itself is unknown in urogenital organs. To investigate whether TGFα overexpression induces carcinogenesis in urogenital organs, we analyzed the phenotypes of urogenital organs in male TGFα transgenic (TG) mice of the CD1 strain. Urogenital organs including the kidney, bladder, prostate, seminal vesicles, testes, and epididymis were isolated from 4- to 48-week-old TGFα TG and wild-type (WT) CD1 mice. Prostates were separated into anterior prostate (AP), dorsolateral prostate (DLP), and ventral prostate (VP). Neither tumor formation nor epithelial hyperplasia was observed in the TGFα TG mouse urogenital organs that we have investigated. Histopathologically, in prostate, we found an increased number of p63-positive basal epithelial cells in the TGFα TG mice AP and DLP. There was no morphological change in the stromal component, such as hypercellular stroma or fibrosis. However, bladder weight was greater in TGFα TG mice than that in WT mice, and distended bladders were observed macroscopically in 19 of 20 TGFα TG mice over 20 weeks of age. Ki67 labeling index was increased significantly in the TGFα TG mouse urethral epithelium, whereas neither epithelial hyperplasia nor hypertrophy was observed. In conclusion, our results suggest that TGFα overexpression in mouse urogenital organs alone may not be responsible for tumor formation and epithelial hyperplasia, but is involved in bladder outlet obstruction.
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Affiliation(s)
- Yuko Yoshio
- Department of Nephro-Urologic Surgery and Andrology, Mie University Graduate School of Medicine, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
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31
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Laflamme C, Curt S, Rouabhia M. Epidermal growth factor and bone morphogenetic proteins upregulate osteoblast proliferation and osteoblastic markers and inhibit bone nodule formation. Arch Oral Biol 2010; 55:689-701. [PMID: 20627196 DOI: 10.1016/j.archoralbio.2010.06.010] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2009] [Revised: 06/04/2010] [Accepted: 06/21/2010] [Indexed: 12/29/2022]
Abstract
OBJECTIVE The aim of this study was to investigate the in vitro osteogenic activity of EGF in association with bone morphogenetic proteins BMP2 and BMP7. METHODS SaOS-2 (osteoblast-like cell line from human osteosarcoma) were cultured in the presence of EGF and BMPs for various culture periods to assess (a) cell proliferation by MTT assay, (b) Runx2, alkaline phosphatase (ALP) and osteocalcin (OC) mRNA expression using quantitative RT-PCR and ELISA, and (c) bone tissue mineralization using Alizarin Red staining. RESULTS EGF alone was able to stimulate osteoblast growth in a time-dependent manner. When mixed with BMP2, BMP7, and their combination, EGF greatly promoted osteoblast growth, compared to the BMP- and EGF-stimulated cells, suggesting a possible synergistic effect between EGF and BMPs on osteoblast growth. Stimulation with EGF, EGF/BMP2, and EGF/BMP2/BMP7 for 7 days upregulated Runx2 mRNA expression by the osteoblasts. EGF downregulated ALP mRNA expression, which was recovered when the BMP2/BMP7 combination was added to the osteoblast culture. Tested on OC mRNA expression, EGF had no effect and inhibited the enhancing effect of BMP2 and BMP7 on osteocalcin expression. The bone mineralization assay showed that EGF reduced both the number and size of the bone nodules. This reducing effect was observable even in the presence of BMP2 and BMP7. CONCLUSION This study demonstrated that EGF may act in the early phase to promote osteoblast growth and specific marker expression rather than the late phase involving cell differentiation/mineralization.
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Affiliation(s)
- Claude Laflamme
- Groupe de recherche en écologie buccale, Faculté de médecine dentaire, Pavillon de médecine dentaire, Université Laval, Québec, Canada G1K 7P4
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Dorff TB, Goldman B, Pinski JK, Mack PC, Lara PN, Van Veldhuizen PJ, Quinn DI, Vogelzang NJ, Thompson IM, Hussain MHA. Clinical and correlative results of SWOG S0354: a phase II trial of CNTO328 (siltuximab), a monoclonal antibody against interleukin-6, in chemotherapy-pretreated patients with castration-resistant prostate cancer. Clin Cancer Res 2010; 16:3028-34. [PMID: 20484019 PMCID: PMC2898710 DOI: 10.1158/1078-0432.ccr-09-3122] [Citation(s) in RCA: 157] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
PURPOSE Interleukin-6 (IL-6) facilitates cancer cell survival via pleotrophic effects. We conducted a multicenter phase II study of CNTO328 (siltuximab) as second-line therapy for men with castration-resistant prostate cancer. EXPERIMENTAL DESIGN Eligible men had castration-resistant prostate cancer treated with one prior chemotherapy. Subjects were treated with 6 mg/kg CNTO328 i.v. every 2 weeks for 12 cycles. Response was assessed after every three cycles. Primary end point was prostate-specific antigen (PSA) response rate defined as a 50% reduction. Accrual was planned in two stages, with 20 eligible patients in the first stage and 40 overall. Plasma cytokines and growth factors were measured by Luminex. RESULTS Fifty-three eligible subjects had all received prior taxane therapy. Two (3.8%; 95% CI, 0.5-13.0%) had PSA response. None of the 31 patients with measurable disease had a RECIST (Response Evaluation Criteria in Solid Tumors) response but 7 (23%) had stable disease. With median follow-up of 14.8 months, median progression-free survival was 1.6 months (95% CI, 1.6-1.7) and median overall survival was 11.6 months (95% CI, 7.5-19.0). Grade 3/4 toxicities included disseminated intravascular coagulation (1), central nervous system ischemia (1), elevated aspartate aminotransferase (1), gastritis/esophagitis (2), thrombocytopenia (2), pain (2), leukopenia (1), and neuropathy (2). Median baseline IL-6 levels were 12.5 pg/mL (interquartile range, 2.5-41.5). Patients with IL-6 >12.5 pg/mL had worse survival than those with levels <12.5 pg/mL (53% versus 94%; P = 0.02). After treatment, IL-6 levels were >250-fold higher. Thirty-two of 38 patients had a decline in C-reactive protein plasma levels at 6 weeks. CONCLUSIONS CNTO328 resulted in a PSA response rate of 3.8% and a RECIST stable disease rate of 23%. Declining C-reactive protein levels during treatment may reflect biological activity. Despite evidence of CNTO-mediated IL-6 inhibition, elevated baseline IL-6 levels portended a poor prognosis.
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Affiliation(s)
- Tanya B Dorff
- University of Southern California, Norris Comprehensive Cancer Center, Los Angeles, California 90033, USA.
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Bibbo C, Hatfield SP, Albright JT. Treatment of metastatic prostate adenocarcinoma to the calcaneus. J Foot Ankle Surg 2009; 49:159.e15-20. [PMID: 20015665 DOI: 10.1053/j.jfas.2009.07.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2009] [Indexed: 02/03/2023]
Abstract
Metastatic skeletal adenocarcinoma is an all too common and unfortunate complication of advanced oncologic states. Mortality rates are usually elevated when bony metastasis are evident, as this signifies advanced disease. The foot and ankle are uncommon sites for metastatic deposits, but may occur. As such, the foot and ankle surgeon must be aware of the potential for such disease, and be able to proceed with an imaging and medical work-up of the patient with foot and ankle skeletal metastasis. The goal of treatment is pain relief and the preservation of functional ambulation, which may greatly enhance the quality of remaining life for patients. A team approach is mandatory to manage the patients with metastatic disease. We present a case of an elderly male with a known history of prostate cancer, who presented with unrelenting heel pain, which upon diagnostic work-up, proved to be progressive calcaneal as well as axial metastasis after a brief period of clinical remission. Operative management coupled with palliative radiation and bisphosphonate therapy provided symptomatic pain relief and maintenance of functional ambulation.
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Affiliation(s)
- Christopher Bibbo
- Foot & Ankle Section, Department of Orthopaedics, Marshfield Clinic, Marshfield, WI, USA.
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Subhawong AP, Subhawong TK, Li QK. Fine needle aspiration of metastatic prostate carcinoma simulating a primary adrenal cortical neoplasm: a case report and review of the literature. Diagn Cytopathol 2009; 38:147-53. [PMID: 19693937 DOI: 10.1002/dc.21165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Adrenal metastases usually occur in prostate cancer patients with widespread bone and visceral disease. Autopsy studies have shown that adrenal metastases may be found in up to 23% of these patients. However, the finding of an isolated adrenal metastasis without the involvement of other organs in a patient with prostate cancer is exceedingly rare. Thus, it may cause a diagnostic dilemma on FNA cytology. We report a patient with a history of prostate cancer, status post radiation, and hormonal therapy 4 years before, who presented with a new, single adrenal mass on abdominal imaging studies. The ultrasound-guided FNA cytology of the adrenal mass revealed cytomorphological features that were suggestive of a primary adrenal cortical neoplasm, but overlapped with those of a prostate metastasis. To our knowledge, FNA findings of metastatic prostate cancer simulating an adrenal cortical neoplasm have not been previously reported in the English literature. The purpose of our study is to discuss the differential diagnosis of these entities. The accurate diagnosis is important because of different prognosis and treatment implications for the various diseases.
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Affiliation(s)
- Andrea P Subhawong
- Division of Cytopathology, Department of Pathology, The Johns Hopkins Hospital, Baltimore, Maryland 21287, USA
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