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Nascimento-Viana JB, Alcántara-Hernández R, Oliveira-Barros E, Castello Branco LA, Feijó PR, Soares Romeiro LA, Nasciutti LE, Noël F, García-Sáinz JA, Silva CLM. The α1-adrenoceptor-mediated human hyperplastic prostate cells proliferation is impaired by EGF receptor inhibition. Life Sci 2019; 239:117048. [PMID: 31730867 DOI: 10.1016/j.lfs.2019.117048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 10/24/2019] [Accepted: 11/05/2019] [Indexed: 01/12/2023]
Abstract
Benign prostatic hyperplasia (BPH) is an aging-related and progressive disease linked to an up-regulation of α1-adrenoceptors. The participation of EGF receptors (EGFR) in the GPCRs' signalosome has been described but so far data about the contribution of these receptors to prostatic stromal hyperplasia are scanty. We isolated and cultured vimentin-positive prostate stromal cells obtained from BPH patients. According to intracellular Ca2+ measurements, cell proliferation and Western blotting assays, these cultured hyperplastic stromal cells express functional α1-adrenoceptors and EGFR, and proliferate in response to the α1-adrenoceptor agonist phenylephrine. Interestingly, in these cells the inhibition of EGFR signaling with GM6001, CRM197, AG1478 or PD98059 was associated with full blockage of α1-adrenoceptor-mediated cell proliferation, while cell treatment with each inhibitor alone did not alter basal cell growth. Moreover, the co-incubation of AG1478 (EGFR inhibitor) with α1A/α1D-adrenoceptor antagonists showed no additive inhibitory effect. These findings highlight a putative role of EGFR signaling to α1-adrenoceptor-mediated human prostate hyperplasia, suggesting that the inhibition of this transactivation cascade could be useful to reduce BPH progression.
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Affiliation(s)
| | | | - Eliane Oliveira-Barros
- Cell Biology and Development Research Program, Universidade Federal do Rio de Janeiro, Brazil
| | - Luiza A Castello Branco
- Cell Biology and Development Research Program, Universidade Federal do Rio de Janeiro, Brazil
| | - Priscilla R Feijó
- Laboratory of Biochemical and Molecular Pharmacology, Universidade Federal do Rio de Janeiro, Brazil
| | | | - Luiz Eurico Nasciutti
- Cell Biology and Development Research Program, Universidade Federal do Rio de Janeiro, Brazil
| | - François Noël
- Laboratory of Biochemical and Molecular Pharmacology, Universidade Federal do Rio de Janeiro, Brazil
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2
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Kim J, Morley S, Le M, Bedoret D, Umetsu DT, Di Vizio D, Freeman MR. Enhanced shedding of extracellular vesicles from amoeboid prostate cancer cells: potential effects on the tumor microenvironment. Cancer Biol Ther 2014; 15:409-18. [PMID: 24423651 DOI: 10.4161/cbt.27627] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The gene encoding the cytoskeletal regulator DIAPH3 is lost at high frequency in metastatic prostate cancer, and DIAPH3 silencing evokes a transition to an amoeboid tumor phenotype in multiple cell backgrounds. This amoeboid transformation is accompanied by increased tumor cell migration, invasion, and metastasis. DIAPH3 silencing also promotes the formation of atypically large (> 1 μm) membrane blebs that can be shed as extracellular vesicles (EV) containing bioactive cargo. Whether loss of DIAPH3 also stimulates the release of nano-sized EV (e.g., exosomes) is not established. Here we examined the mechanism of release and potential biological functions of EV shed from DIAPH3-silenced and other prostate cancer cells. We observed that stimulation of LNCaP cells with the prostate stroma-derived growth factor heparin-binding EGF-like growth factor (HB-EGF), combined with p38MAPK inhibition caused EV shedding, a process mediated by ERK1/2 hyperactivation. DIAPH3 silencing in DU145 cells also increased rates of EV production. EV isolated from DIAPH3-silenced cells activated AKT1 and androgen signaling, increased proliferation of recipient tumor cells, and suppressed proliferation of human macrophages and peripheral blood mononuclear cells. DU145 EV contained miR-125a, which suppressed AKT1 expression and proliferation in recipient human peripheral blood mononuclear cells and macrophages. Our findings suggest that EV produced as a result of DIAPH3 loss or growth factor stimulation may condition the tumor microenvironment through multiple mechanisms, including the proliferation of cancer cells and suppression of tumor-infiltrating immune cells.
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Affiliation(s)
- Jayoung Kim
- Division of Cancer Biology and Therapeutics; Departments of Surgery, Pathology and Laboratory Medicine, and Biomedical Sciences; Samuel Oschin Comprehensive Cancer Institute; Cedars-Sinai Medical Center; Los Angeles, CA USA; Urological Diseases Research Center; Boston Children's Hospital; Boston, MA USA; Department of Surgery; Harvard Medical School; Boston, MA USA
| | - Samantha Morley
- Urological Diseases Research Center; Boston Children's Hospital; Boston, MA USA; Department of Surgery; Harvard Medical School; Boston, MA USA
| | - Minh Le
- Program in Cellular and Molecular Medicine; Boston Children's Hospital; Harvard Medical School; Boston, MA USA
| | - Denis Bedoret
- Division of Immunology; Boston Children's Hospital; Harvard Medical School; Boston, MA USA
| | - Dale T Umetsu
- Division of Immunology; Boston Children's Hospital; Harvard Medical School; Boston, MA USA
| | - Dolores Di Vizio
- Division of Cancer Biology and Therapeutics; Departments of Surgery, Pathology and Laboratory Medicine, and Biomedical Sciences; Samuel Oschin Comprehensive Cancer Institute; Cedars-Sinai Medical Center; Los Angeles, CA USA; Urological Diseases Research Center; Boston Children's Hospital; Boston, MA USA; Department of Surgery; Harvard Medical School; Boston, MA USA
| | - Michael R Freeman
- Division of Cancer Biology and Therapeutics; Departments of Surgery, Pathology and Laboratory Medicine, and Biomedical Sciences; Samuel Oschin Comprehensive Cancer Institute; Cedars-Sinai Medical Center; Los Angeles, CA USA; Urological Diseases Research Center; Boston Children's Hospital; Boston, MA USA; Department of Surgery; Harvard Medical School; Boston, MA USA
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Bauer M, Su G, Casper C, He R, Rehrauer W, Friedl A. Heterogeneity of gene expression in stromal fibroblasts of human breast carcinomas and normal breast. Oncogene 2010; 29:1732-40. [PMID: 20062080 PMCID: PMC2845730 DOI: 10.1038/onc.2009.463] [Citation(s) in RCA: 134] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Breast carcinoma invasion is associated with prominent alterations in stromal fibroblasts. Carcinoma-associated fibroblasts (CAF) support and promote tumorigenesis, whereas normal mammary fibroblasts (NF) are thought to suppress tumor progression. Little is known about the difference in gene expression between CAF and NF or the patient-to-patient variability in gene expression. Paired CAF and NF were isolated from six primary human breast carcinoma specimens. RNA was extracted from low-passage cultures of CAF and NF and analyzed with Affymetrix Human Genome U133 Plus 2.0 arrays. The array data were examined with an empirical Bayes model and filtered according to the posterior probability of equivalent expression and fold difference in expression. Twenty-one genes (27 probe sets) were up-regulated in CAF, as compared to NF. Known functions of these genes relate to paracrine or intracellular signaling, transcriptional regulation, extracellular matrix and cell adhesion/migration. Ten genes (14 probe sets) were down-regulated in CAF, including the pluripotency transcription factor KLF4. Quantitative RT-PCR analysis of 10 genes validated the array results. Immunohistochemical staining for three gene products confirmed stromal expression in terms of location and relative quantity. Surprisingly, the variability of gene expression was slightly higher in NF than in CAF, suggesting inter-individual heterogeneity of normal stroma.
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Affiliation(s)
- M Bauer
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI 53705, USA
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Hattori K, Joraku A, Miyagawa T, Kawai K, Oyasu R, Akaza H. Bladder reconstruction using a collagen patch prefabricated within the omentum. Int J Urol 2006; 13:529-37. [PMID: 16771721 DOI: 10.1111/j.1442-2042.2006.01351.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE We present our experience with a novel bladder reconstruction model using a collagen sponge pre-embedded within the omentum. The aim of the study is to evaluate tissue regeneration of the reconstructed bladder and the effect of prefabricating the collagen patch within the omentum. MATERIALS AND METHODS Twenty pigs were divided into three groups. For the prefabricated patch group (PFP; n=10), collagen sponge was inserted into the omentum. After 1 week, the pigs underwent a hemicystectomy and the sponge with an attached omental flap was brought to close the defect. For the non-prefabricated patch group (NPFP; n=6), pigs received hemicystectomy and closure with a collagen sponge without prefabricating in the omentum. Four other pigs received hemicystectomy alone as a control (C; n=4). All animals in the NPFP and C groups, and 7 of 10 in the PFP group were sacrificed at 4 or 8 weeks. Three other pigs in the PFP group were sacrificed at 12 weeks. Resected bladders were submitted to hematoxylin-eosin, and immunohistochemical staining. RESULTS All animals except for two in the NPFP group survived. At the time of grafting, the collagen sponge was covered with thick omental methothelial layers, and neo-vascularization from the omentum was observed. At each time point, only slight adhesion was observed around the patch in the PFP group, while severe adhesion between the patch and the bowel was observed in the NPFP group, suggesting that prefabricated collagen sponge within the omentum prevented urine leakage from the bladder. Histologically, the patch was well vascularized, and the luminal surface was covered with urothelium at 4 weeks in both groups. However, in the PFP group, there was mild inflammation in the submucosa and in-growth of smooth muscle derived from the adjacent muscle layers was observed with time, whereas severe inflammation was observed and in-growth of smooth muscle was limited in the NPF group. CONCLUSIONS Prefabricating of a collagen patch within the omentum stimulated early neo-vascularization before grafting, and this procedure appears to offer an advantage for bladder reconstruction over a non-prefabricated procedure in terms of prevention of urine leakage and inflammation, and favorable tissue regeneration.
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Stehr M, Estrada CR, Khoury J, Danciu TE, Sullivan MP, Peters CA, Solomon KR, Freeman MR, Adam RM. CAVEOLAE ARE NEGATIVE REGULATORS OF TRANSFORMING GROWTH FACTOR-β1 SIGNALING IN URETERAL SMOOTH MUSCLE CELLS. J Urol 2004; 172:2451-5. [PMID: 15538289 DOI: 10.1097/01.ju.0000138084.53577.ca] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE The mechanisms underlying ureteral cell regulation are largely unknown. Previous studies have identified lipid rafts/caveolae as regulators of growth stimulatory signals in ureteral smooth muscle cells (USMCs). In this study we determined whether growth inhibitory signaling by transforming growth factor-beta1 (TGF-beta1) is also regulated by caveolae in USMC. MATERIALS AND METHODS Expression of components of the TGF-beta1 signaling axis in USMCs was determined by immunoblot and mRNA analyses. Growth regulatory activity of TGF-beta1 was assessed by H-thymidine incorporation. In select experiments caveolae were disrupted reversibly by cholesterol depletion and replenishment prior to TGF-beta1 treatment. TGF-beta1-responsive gene expression was evaluated using the TGF-beta1 responsive promoter-reporter construct 3TP-Lux. RESULTS USMCs expressed TGF-beta1, types I and II TGF-beta1 receptors, and the effector Smad-2. TGF-beta1 potently inhibited DNA synthesis in USMCs (IC50 60 pM). TGF-beta1 mediated DNA synthesis inhibition was potentiated following the disruption of caveolae by cholesterol depletion. This effect was reversible with membrane cholesterol restoration. TGF-beta1 stimulated gene activity was augmented by caveolae disruption, while caveolae reformation returned promoter activity to baseline levels. CONCLUSIONS TGF-beta1 is a potent growth inhibitor of USMCs and its activity can be enhanced by caveolae ablation. These findings suggest a role for TGF-beta1 in the growth regulation of normal ureteral cells and implicate caveolar membrane domains in the negative regulation of TGF-beta1 signaling. These studies may be relevant to ureteral pathologies that are characterized by smooth muscle dysplasia.
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Affiliation(s)
- Maximilian Stehr
- Department of Urology (Urological Diseases Research Center), Children's Hospital Boston, Massachusetts 02115, USA
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Lin J, Freeman MR. Transactivation of ErbB1 and ErbB2 receptors by angiotensin II in normal human prostate stromal cells. Prostate 2003; 54:1-7. [PMID: 12481249 DOI: 10.1002/pros.10160] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
BACKGROUND Heparin-binding epidermal growth factor-like growth factor (HB-EGF) is synthesized primarily in the stromal compartment of the human prostate and may regulate stromal as well as epithelial cell growth and survival. The primary cognate HB-EGF receptor, ErbB1, has been shown recently to be transactivated by G-protein coupled receptors (GPCRs) through regulated proteolytic cleavage of the membrane-bound, precursor form of HB-EGF. Previous studies have demonstrated that human prostate tissue, especially tissue from benign prostatic hyperplasia (BPH), has high angiotensin converting enzyme activity, and a high density of angiotensin (Ang) receptors in periurethral stromal cells. Because the pressor peptide Ang II signals through GPCRs, we tested the possibility that Ang II could transactivate ErbB1/ErbB2 in human prostate stromal (hPS) cells. METHODS Primary and early passage hPS cells were used as an in vitro model. Cells were stimulated by recombinant HB-EGF or Ang II and total cell lysates were harvested for immunoprecipitation and Western blot. Cell growth was measured by [(3)H]thymidine incorporation assay and 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyl-tetrazoliumbromide (MTT) assay. RESULTS Ang II receptors AT1 and AT2 were expressed in hPS cells. ErbB1 and ErbB2 receptors were activated by HB-EGF. Furthermore, Ang II was able to transactivate both ErbB1 and ErbB2, and this transactivation activity could be abolished by pretreatment with [Glu-52]-diphtheria toxin/CRM197, a specific inhibitor of HB-EGF bioactivity. Consistent with its transactivation activity, Ang II modestly promoted hPS cell growth and this effect was abolished by pretreatment with the ErbB1 antagonist AG1478. CONCLUSION These experiments suggest a regulatory role for Ang II in the prostate stroma and implicate the endogenous stromal growth factor HB-EGF as a mediator of Ang II signaling in the prostate.
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Affiliation(s)
- Jianqing Lin
- The Urologic Laboratory, Department of Urology, Children's Hospital, and the Department of Surgery, Harvard Medical School, Boston, Massachusetts 02115, USA
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7
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Agus DB, Akita RW, Fox WD, Lewis GD, Higgins B, Pisacane PI, Lofgren JA, Tindell C, Evans DP, Maiese K, Scher HI, Sliwkowski MX. Targeting ligand-activated ErbB2 signaling inhibits breast and prostate tumor growth. Cancer Cell 2002; 2:127-37. [PMID: 12204533 DOI: 10.1016/s1535-6108(02)00097-1] [Citation(s) in RCA: 656] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
ErbB2 is a ligand-less member of the ErbB receptor family that functions as a coreceptor with EGFR, ErbB3, and ErbB4. Here, we describe an approach to target ErbB2's role as a coreceptor using a monoclonal antibody, 2C4, which sterically hinders ErbB2's recruitment into ErbB ligand complexes. Inhibition of ligand-dependent ErbB2 signaling by 2C4 occurs in both low- and high-ErbB2-expressing systems. Since the ErbB3 receptor contains an inactive tyrosine kinase domain, 2C4 is very effective in blocking heregulin-mediated ErbB3-ErbB2 signaling. We demonstrate that the in vitro and in vivo growth of several breast and prostate tumor models is inhibited by 2C4 treatment.
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MESH Headings
- Androgens/metabolism
- Animals
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/therapeutic use
- Antineoplastic Agents/pharmacology
- Antineoplastic Agents/therapeutic use
- Breast Neoplasms/drug therapy
- Breast Neoplasms/metabolism
- Breast Neoplasms/pathology
- Cell Division/drug effects
- Female
- Gene Expression Regulation, Neoplastic
- Humans
- Ligands
- Male
- Mice
- Neoplasm Transplantation
- Neuregulin-1/pharmacology
- Prostatic Neoplasms/drug therapy
- Prostatic Neoplasms/metabolism
- Prostatic Neoplasms/pathology
- Protein Binding/drug effects
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Receptor, ErbB-2/antagonists & inhibitors
- Receptor, ErbB-2/genetics
- Receptor, ErbB-2/immunology
- Receptor, ErbB-2/metabolism
- Receptor, ErbB-3/metabolism
- Signal Transduction/drug effects
- Time Factors
- Transplantation, Heterologous
- Tumor Cells, Cultured
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Affiliation(s)
- David B Agus
- Cedars-Sinai Prostate Cancer Center, Los Angeles, California 90048, USA
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Peng JB, Zhuang L, Berger UV, Adam RM, Williams BJ, Brown EM, Hediger MA, Freeman MR. CaT1 expression correlates with tumor grade in prostate cancer. Biochem Biophys Res Commun 2001; 282:729-34. [PMID: 11401523 DOI: 10.1006/bbrc.2001.4638] [Citation(s) in RCA: 136] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Ca(2+) signaling is important for growth and survival of prostatic carcinoma (PCa) cells. Here we report that the gene for CaT1, a channel protein highly selective for Ca(2+), is expressed at high levels in human PCa and in the LNCaP PCa cell line. CaT1 mRNA levels were elevated in PCa specimens in comparison to benign prostatic hyperplasia (BPH) specimens and positively correlated with Gleason grade in a PCa series. CaT1 mRNA was suppressed by androgen and was induced by a specific androgen receptor antagonist in LNCaP cells, suggesting that the gene is negatively regulated by androgen. These findings are the first to implicate a Ca(2+) channel in PCa progression and suggest that CaT1 may be a novel target for therapy.
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Affiliation(s)
- J B Peng
- Membrane Biology Program, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, 02115, USA
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