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Patel RA, Sayar E, Coleman I, Roudier MP, Hanratty B, Low JY, Jaiswal N, Ajkunic A, Dumpit R, Ercan C, Salama N, O’Brien VP, Isaacs WB, Epstein JI, De Marzo AM, Trock BJ, Luo J, Brennen WN, Tretiakova M, Vakar-Lopez F, True LD, Goodrich DW, Corey E, Morrissey C, Nelson PS, Hurley PJ, Gulati R, Haffner MC. Characterization of HOXB13 expression patterns in localized and metastatic castration-resistant prostate cancer. J Pathol 2024; 262:105-120. [PMID: 37850574 PMCID: PMC10871027 DOI: 10.1002/path.6216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 08/16/2023] [Accepted: 09/08/2023] [Indexed: 10/19/2023]
Abstract
HOXB13 is a key lineage homeobox transcription factor that plays a critical role in the differentiation of the prostate gland. Several studies have suggested that HOXB13 alterations may be involved in prostate cancer development and progression. Despite its potential biological relevance, little is known about the expression of HOXB13 across the disease spectrum of prostate cancer. To this end, we validated a HOXB13 antibody using genetic controls and investigated HOXB13 protein expression in murine and human developing prostates, localized prostate cancers, and metastatic castration-resistant prostate cancers. We observed that HOXB13 expression increases during later stages of murine prostate development. All localized prostate cancers showed HOXB13 protein expression. Interestingly, lower HOXB13 expression levels were observed in higher-grade tumors, although no significant association between HOXB13 expression and recurrence or disease-specific survival was found. In advanced metastatic prostate cancers, HOXB13 expression was retained in the majority of tumors. While we observed lower levels of HOXB13 protein and mRNA levels in tumors with evidence of lineage plasticity, 84% of androgen receptor-negative castration-resistant prostate cancers and neuroendocrine prostate cancers (NEPCs) retained detectable levels of HOXB13. Notably, the reduced expression observed in NEPCs was associated with a gain of HOXB13 gene body CpG methylation. In comparison to the commonly used prostate lineage marker NKX3.1, HOXB13 showed greater sensitivity in detecting advanced metastatic prostate cancers. Additionally, in a cohort of 837 patients, 383 with prostatic and 454 with non-prostatic tumors, we found that HOXB13 immunohistochemistry had a 97% sensitivity and 99% specificity for prostatic origin. Taken together, our studies provide valuable insight into the expression pattern of HOXB13 during prostate development and cancer progression. Furthermore, our findings support the utility of HOXB13 as a diagnostic biomarker for prostate cancer, particularly to confirm the prostatic origin of advanced metastatic castration-resistant tumors. © 2023 The Pathological Society of Great Britain and Ireland.
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Affiliation(s)
- Radhika A. Patel
- Division of Human Biology, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Erolcan Sayar
- Division of Human Biology, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Ilsa Coleman
- Division of Human Biology, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | | | - Brian Hanratty
- Division of Human Biology, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Jin-Yih Low
- Division of Human Biology, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Neha Jaiswal
- Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Azra Ajkunic
- Division of Human Biology, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Ruth Dumpit
- Division of Human Biology, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Caner Ercan
- Institute of Pathology and Medical Genetics, University Hospital Basel, Basel, Switzerland
| | - Nina Salama
- Division of Human Biology, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Valerie P. O’Brien
- Division of Human Biology, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - William B. Isaacs
- Department of Urology, Johns Hopkins University School of Medicine, MD, Baltimore, USA
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, MD, Baltimore, USA
| | - Jonathan I. Epstein
- Department of Urology, Johns Hopkins University School of Medicine, MD, Baltimore, USA
- Department of Pathology, Johns Hopkins University School of Medicine, MD, Baltimore, USA
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, MD, Baltimore, USA
| | - Angelo M. De Marzo
- Department of Urology, Johns Hopkins University School of Medicine, MD, Baltimore, USA
- Department of Pathology, Johns Hopkins University School of Medicine, MD, Baltimore, USA
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, MD, Baltimore, USA
| | - Bruce J. Trock
- Department of Urology, Johns Hopkins University School of Medicine, MD, Baltimore, USA
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, MD, Baltimore, USA
| | - Jun Luo
- Department of Urology, Johns Hopkins University School of Medicine, MD, Baltimore, USA
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, MD, Baltimore, USA
| | - W Nathaniel Brennen
- Department of Urology, Johns Hopkins University School of Medicine, MD, Baltimore, USA
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, MD, Baltimore, USA
| | - Maria Tretiakova
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
| | - Funda Vakar-Lopez
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
| | - Lawrence D. True
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
| | - David W. Goodrich
- Department of Pharmacology and Therapeutics, Roswell Park Comprehensive Cancer Center, Buffalo, NY, USA
| | - Eva Corey
- Department of Urology, University of Washington, Seattle, WA, USA
| | - Colm Morrissey
- Department of Urology, University of Washington, Seattle, WA, USA
| | - Peter S. Nelson
- Division of Human Biology, Fred Hutchinson Cancer Center, Seattle, WA, USA
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
- Division of Clinical Research, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Paula J. Hurley
- Departments of Medicine and Urology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Roman Gulati
- Division of Public Health Sciences, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Michael C. Haffner
- Division of Human Biology, Fred Hutchinson Cancer Center, Seattle, WA, USA
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
- Division of Clinical Research, Fred Hutchinson Cancer Center, Seattle, WA, USA
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Agarwal S, Fang L, McGowen K, Yin J, Bowman J, Ku AT, Alilin AN, Corey E, Roudier MP, True LD, Dumpit R, Coleman I, Lee JK, Nelson PS, Capaldo BJ, Mariani A, Hoover C, Senatorov IS, Beshiri M, Sowalsky AG, Hurt EM, Kelly K. Tumor-derived biomarkers predict efficacy of B7H3 antibody-drug conjugate treatment in metastatic prostate cancer models. J Clin Invest 2023; 133:e162148. [PMID: 37725435 PMCID: PMC10645377 DOI: 10.1172/jci162148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 09/12/2023] [Indexed: 09/21/2023] Open
Abstract
Antibody-drug conjugates (ADCs) are a promising targeted cancer therapy; however, patient selection based solely on target antigen expression without consideration for cytotoxic payload vulnerabilities has plateaued clinical benefits. Biomarkers to capture patients who might benefit from specific ADCs have not been systematically determined for any cancer. We present a comprehensive therapeutic and biomarker analysis of a B7H3-ADC with pyrrolobenzodiazepine(PBD) payload in 26 treatment-resistant, metastatic prostate cancer (mPC) models. B7H3 is a tumor-specific surface protein widely expressed in mPC, and PBD is a DNA cross-linking agent. B7H3 expression was necessary but not sufficient for B7H3-PBD-ADC responsiveness. RB1 deficiency and/or replication stress, characteristics of poor prognosis, and conferred sensitivity were associated with complete tumor regression in both neuroendocrine (NEPC) and androgen receptor positive (ARPC) prostate cancer models, even with low B7H3 levels. Non-ARPC models, which are currently lacking efficacious treatment, demonstrated the highest replication stress and were most sensitive to treatment. In RB1 WT ARPC tumors, SLFN11 expression or select DNA repair mutations in SLFN11 nonexpressors governed response. Importantly, WT TP53 predicted nonresponsiveness (7 of 8 models). Overall, biomarker-focused selection of models led to high efficacy of in vivo treatment. These data enable a paradigm shift to biomarker-driven trial designs for maximizing clinical benefit of ADC therapies.
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Affiliation(s)
- Supreet Agarwal
- Laboratory of Genitourinary Cancer Pathogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | - Lei Fang
- Laboratory of Genitourinary Cancer Pathogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | - Kerry McGowen
- Laboratory of Genitourinary Cancer Pathogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | - JuanJuan Yin
- Laboratory of Genitourinary Cancer Pathogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | - Joel Bowman
- Laboratory of Genitourinary Cancer Pathogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | - Anson T. Ku
- Laboratory of Genitourinary Cancer Pathogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | - Aian Neil Alilin
- Laboratory of Genitourinary Cancer Pathogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | | | | | - Lawrence D. True
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington, USA
| | - Ruth Dumpit
- Divisions of Human Biology and Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Ilsa Coleman
- Divisions of Human Biology and Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - John K. Lee
- Divisions of Human Biology and Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Peter S. Nelson
- Divisions of Human Biology and Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Brian J. Capaldo
- Laboratory of Genitourinary Cancer Pathogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | | | | | - Ilya S. Senatorov
- Laboratory of Genitourinary Cancer Pathogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | - Michael Beshiri
- Laboratory of Genitourinary Cancer Pathogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | - Adam G. Sowalsky
- Laboratory of Genitourinary Cancer Pathogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
| | | | - Kathleen Kelly
- Laboratory of Genitourinary Cancer Pathogenesis, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA
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Schweizer MT, Gulati R, Yezefski T, Cheng HH, Mostaghel E, Haffner MC, Patel RA, De Sarkar N, Ha G, Dumpit R, Woo B, Lin A, Panlasigui P, McDonald N, Lai M, Nega K, Hammond J, Grivas P, Hsieh A, Montgomery B, Nelson PS, Yu EY. Bipolar androgen therapy plus olaparib in men with metastatic castration-resistant prostate cancer. Prostate Cancer Prostatic Dis 2023; 26:194-200. [PMID: 36564459 PMCID: PMC10286318 DOI: 10.1038/s41391-022-00636-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 12/07/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022]
Abstract
BACKGROUND Bipolar androgen therapy (BAT) results in rapid fluctuation of testosterone (T) between near-castrate and supraphysiological levels and has shown promise in metastatic castration-resistant prostate cancer (mCRPC). Its clinical effects may be mediated through induction of DNA damage, and preclinical studies suggest synergy with PARP inhibitors. PATIENTS AND METHODS This was a single-center, Phase II trial testing olaparib plus BAT (T cypionate/enanthate 400 mg every 28 days) with ongoing androgen deprivation. Planned recruitment was 30 subjects (equal proportions with/without homologous recombination repair [HRR] gene mutations) with mCRPC post abiraterone and/or enzalutamide. The primary objective was to determine PSA50 response (PSA decline ≥50% from baseline) rate at 12-weeks. The primary analysis utilized the entire (intent-to-treat [ITT]) cohort, with those dropping out early counted as non-responders. Secondary/exploratory analyses were in those treated beyond 12-weeks (response-evaluable cohort). RESULTS Thirty-six patients enrolled and 6 discontinued prior to response assessment. In the ITT cohort, PSA50 response rate at 12-weeks was 11/36 (31%; 95% CI 17-48%), and 16/36 (44%, 95% CI 28-62%) had a PSA50 response at any time on-study. After a median follow-up of 19 months, the median clinical/radiographic progression-free survival in the ITT cohort was 13.0 months (95% CI 7-17). Clinical outcomes were similar regardless of HRR gene mutational status. CONCLUSIONS BAT plus olaparib is associated with high response rates and long PFS. Clinical benefit was observed regardless of HRR gene mutational status.
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Affiliation(s)
- Michael T Schweizer
- Department of Medicine, University of Washington, Seattle, WA, USA.
- Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA, USA.
| | - Roman Gulati
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Todd Yezefski
- Department of Medicine, University of Washington, Seattle, WA, USA
- Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Heather H Cheng
- Department of Medicine, University of Washington, Seattle, WA, USA
- Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Elahe Mostaghel
- Department of Medicine, University of Washington, Seattle, WA, USA
- Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
- VA Puget Sound Health Care System, Seattle, WA, USA
| | - Michael C Haffner
- Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
- Human Biology Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
| | - Radhika A Patel
- Human Biology Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Navonil De Sarkar
- Human Biology Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Gavin Ha
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
- Human Biology Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Ruth Dumpit
- Human Biology Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Brianna Woo
- Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Aaron Lin
- Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Patrick Panlasigui
- Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Nerina McDonald
- Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Michael Lai
- Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Katie Nega
- Department of Medicine, University of Washington, Seattle, WA, USA
| | - Jeannette Hammond
- Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Petros Grivas
- Department of Medicine, University of Washington, Seattle, WA, USA
- Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Andrew Hsieh
- Department of Medicine, University of Washington, Seattle, WA, USA
- Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
- Human Biology Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Bruce Montgomery
- Department of Medicine, University of Washington, Seattle, WA, USA
- Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
- VA Puget Sound Health Care System, Seattle, WA, USA
| | - Peter S Nelson
- Department of Medicine, University of Washington, Seattle, WA, USA
- Human Biology Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
| | - Evan Y Yu
- Department of Medicine, University of Washington, Seattle, WA, USA
- Clinical Research Division, Fred Hutchinson Cancer Center, Seattle, WA, USA
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Jia D, Zhou Z, Kwon OJ, Zhang L, Wei X, Zhang Y, Yi M, Roudier MP, Regier MC, Dumpit R, Nelson PS, Headley M, True L, Lin DW, Morrissey C, Creighton CJ, Xin L. Stromal FOXF2 suppresses prostate cancer progression and metastasis by enhancing antitumor immunity. Nat Commun 2022; 13:6828. [PMID: 36369237 PMCID: PMC9652358 DOI: 10.1038/s41467-022-34665-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 11/02/2022] [Indexed: 11/13/2022] Open
Abstract
Cancer-associated fibroblasts (CAFs) mediate an immunosuppressive effect, but the underlying mechanism remains incompletely defined. Here we show that increasing prostatic stromal Foxf2 suppresses the growth and progression of both syngeneic and autochthonous mouse prostate cancer models in an immunocompetent context. Mechanistically, Foxf2 moderately attenuates the CAF phenotype and transcriptionally downregulates Cxcl5, which diminish the immunosuppressive myeloid cells and enhance T cell cytotoxicity. Increasing prostatic stromal Foxf2 sensitizes prostate cancer to the immune checkpoint blockade therapies. Augmenting lung stromal Foxf2 also mediates an immunosuppressive milieu and inhibits lung colonization of prostate cancer. FOXF2 is expressed higher in the stroma of human transition zone (TZ) than peripheral zone (PZ) prostate. The stromal FOXF2 expression level in primary prostate cancers inversely correlates with the Gleason grade. Our study establishes Foxf2 as a stromal transcription factor modulating the tumor immune microenvironment and potentially explains why cancers are relatively rare and indolent in the TZ prostate.
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Affiliation(s)
- Deyong Jia
- Department of Urology, University of Washington, Seattle, WA, USA
| | - Zhicheng Zhou
- Department of Urology, University of Washington, Seattle, WA, USA
| | - Oh-Joon Kwon
- Department of Urology, University of Washington, Seattle, WA, USA
| | - Li Zhang
- Department of Urology, University of Washington, Seattle, WA, USA
| | - Xing Wei
- Department of Urology, University of Washington, Seattle, WA, USA
| | - Yiqun Zhang
- Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX, USA
| | - Mingyang Yi
- Department of Biochemistry, University of Washington, Seattle, WA, USA
| | | | - Mary C Regier
- Institute of Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
| | - Ruth Dumpit
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Peter S Nelson
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Mark Headley
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Lawrence True
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
| | - Daniel W Lin
- Department of Urology, University of Washington, Seattle, WA, USA
| | - Colm Morrissey
- Department of Urology, University of Washington, Seattle, WA, USA
| | - Chad J Creighton
- Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX, USA
| | - Li Xin
- Department of Urology, University of Washington, Seattle, WA, USA.
- Institute of Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA.
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Patel RA, Coleman I, Roudier MP, Konnick EQ, Hanratty B, Dumpit R, Lucas JM, Ang LS, Low JY, Tretiakova MS, Ha G, Lee JK, True LD, De Marzo AM, Nelson PS, Morrissey C, Pritchard CC, Haffner MC. Comprehensive assessment of anaplastic lymphoma kinase in localized and metastatic prostate cancer reveals targetable alterations. Cancer Res Commun 2022; 2:277-285. [PMID: 36337169 PMCID: PMC9635400 DOI: 10.1158/2767-9764.crc-21-0156] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/14/2022] [Accepted: 04/14/2022] [Indexed: 06/16/2023]
Abstract
Anaplastic lymphoma kinase (ALK) is a tyrosine kinase with genomic and expression changes in many solid tumors. ALK inhibition is first line therapy for lung cancers with ALK alterations, and an effective therapy in other tumor types, but has not been well-studied in prostate cancer. Here, we aim to delineate the role of ALK genomic and expression changes in primary and metastatic prostate cancer. We determined ALK expression by immunohistochemistry and RNA-Seq, and genomic alterations by NGS. We assessed functional consequences of ALK overexpression and pharmacological ALK inhibition by cell proliferation and cell viability assays. Among 372 primary prostate cancer cases we identified one case with uniformly high ALK protein expression. Genomic analysis revealed a SLC45A3-ALK fusion which promoted oncogenesis in in vitro assays. We observed ALK protein expression in 5/52 (9%) of metastatic prostate cancer cases, of which 4 of 5 had neuroendocrine features. ALK-expressing neuroendocrine prostate cancer had a distinct transcriptional program, and earlier disease progression. An ALK-expressing neuroendocrine prostate cancer model was sensitive to pharmacological ALK inhibition. In summary, we found that ALK overexpression is rare in primary prostate cancer, but more frequent in metastatic prostate cancers with neuroendocrine differentiation. Further, ALK fusions similar to lung cancer are an occasional driver in prostate cancer. Our data suggest that ALK-directed therapies could be an option in selected patients with advanced prostate cancer.
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Affiliation(s)
- Radhika A. Patel
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Ilsa Coleman
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | | | - Eric Q. Konnick
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington
- The Brotman Baty Institute for Precision Medicine, Seattle, Washington
| | - Brian Hanratty
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Ruth Dumpit
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Jared M. Lucas
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Lisa S. Ang
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Jin-Yih Low
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Maria S. Tretiakova
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington
| | - Gavin Ha
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington
- The Brotman Baty Institute for Precision Medicine, Seattle, Washington
| | - John K. Lee
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington
- Division of Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Lawrence D. True
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington
| | - Angelo M. De Marzo
- Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, Baltimore, Maryland
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Peter S. Nelson
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington
- The Brotman Baty Institute for Precision Medicine, Seattle, Washington
- Division of Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Colm Morrissey
- Department of Urology, University of Washington, Seattle, Washington
| | - Colin C. Pritchard
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington
- The Brotman Baty Institute for Precision Medicine, Seattle, Washington
| | - Michael C. Haffner
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington
- Division of Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, Washington
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland
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Wei X, Roudier MP, Kwon OJ, Lee JD, Kong K, Dumpit R, True L, Morrissey C, Lin DW, Nelson PS, Xin L. Paracrine Wnt signaling is necessary for prostate epithelial proliferation. Prostate 2022; 82:517-530. [PMID: 35014711 PMCID: PMC8866211 DOI: 10.1002/pros.24298] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/18/2021] [Accepted: 12/21/2021] [Indexed: 11/07/2022]
Abstract
INTRODUCTION The Wnt proteins play key roles in the development, homeostasis, and disease progression of many organs including the prostate. However, the spatiotemporal expression patterns of Wnt proteins in prostate cell lineages at different developmental stages and in prostate cancer remain inadequately characterized. METHODS We isolated the epithelial and stromal cells in the developing and mature mouse prostate by flow cytometry and determined the expression levels of Wnt ligands. We used Visium spatial gene expression analysis to determine the spatial distribution of Wnt ligands in the mouse prostatic glands. Using laser-capture microscopy in combination with gene expression analysis, we also determined the expression patterns of Wnt signaling components in stromal and cancer cells in advanced human prostate cancer specimens. To investigate how the stroma-derived Wnt ligands affect prostate development and homeostasis, we used a Col1a2-CreERT2 mouse model to disrupt the Wnt transporter Wntless specifically in prostate stromal cells. RESULTS We showed that the prostate stromal cells are a major source of several Wnt ligands. Visium spatial gene expression analysis revealed a distinct spatial distribution of Wnt ligands in the prostatic glands. We also showed that Wnt signaling components are highly expressed in the stromal compartment of primary and advanced human prostate cancer. Blocking stromal Wnt secretion attenuated prostate epithelial proliferation and regeneration but did not affect cell survival and lineage maintenance. DISCUSSION Our study demonstrates a critical role of stroma-derived Wnt ligands in prostate development and homeostasis.
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Affiliation(s)
- Xing Wei
- Department of Urology, University of Washington, Seattle, WA, USA 98109
| | | | - Oh-Joon Kwon
- Department of Urology, University of Washington, Seattle, WA, USA 98109
| | - Justin Daho Lee
- Molecular Engineering Ph.D. Program, University of Washington, Seattle, WA, USA 98109
- Department of Bioengineering, University of Washington, Seattle, WA, USA 98109
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA 98109
| | - Kevin Kong
- Department of Biology, University of Washington, Seattle, WA, USA 98109
| | - Ruth Dumpit
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, WA, USA 98109
| | - Lawrence True
- Department of Urology, University of Washington, Seattle, WA, USA 98109
- Department of Pathology, University of Washington, Seattle, WA, USA 98109
| | - Colm Morrissey
- Department of Urology, University of Washington, Seattle, WA, USA 98109
| | - Daniel W. Lin
- Department of Urology, University of Washington, Seattle, WA, USA 98109
| | - Peter S. Nelson
- Department of Urology, University of Washington, Seattle, WA, USA 98109
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, WA, USA 98109
- Department of Pathology, University of Washington, Seattle, WA, USA 98109
| | - Li Xin
- Department of Urology, University of Washington, Seattle, WA, USA 98109
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA 98109
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7
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Wei X, Zhang L, Zhou Z, Kwon OJ, Zhang Y, Nguyen H, Dumpit R, True L, Nelson P, Dong B, Xue W, Birchmeier W, Taketo MM, Xu F, Creighton CJ, Ittmann MM, Xin L. Spatially Restricted Stromal Wnt Signaling Restrains Prostate Epithelial Progenitor Growth through Direct and Indirect Mechanisms. Cell Stem Cell 2019; 24:753-768.e6. [PMID: 30982770 DOI: 10.1016/j.stem.2019.03.010] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 12/11/2018] [Accepted: 03/10/2019] [Indexed: 12/31/2022]
Abstract
Cell-autonomous Wnt signaling has well-characterized functions in controlling stem cell activity, including in the prostate. While niche cells secrete Wnt ligands, the effects of Wnt signaling in niche cells per se are less understood. Here, we show that stromal cells in the proximal prostatic duct near the urethra, a mouse prostate stem cell niche, not only produce multiple Wnt ligands but also exhibit strong Wnt/β-catenin activity. The non-canonical Wnt ligand Wnt5a, secreted by proximal stromal cells, directly inhibits proliefration of prostate epithelial stem or progenitor cells whereas stromal cell-autonomous canonical Wnt/β-catenin signaling indirectly suppresses prostate stem or progenitor activity via the transforming growth factor β (TGFβ) pathway. Collectively, these pathways restrain the proliferative potential of epithelial cells in the proximal prostatic ducts. Human prostate likewise exhibits spatially restricted distribution of stromal Wnt/β-catenin activity, suggesting a conserved mechanism for tissue patterning. Thus, this study shows how distinct stromal signaling mechanisms within the prostate cooperate to regulate tissue homeostasis.
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Affiliation(s)
- Xing Wei
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Graduate Program in Integrative Molecular and Biomedical Sciences, Baylor College of Medicine, Houston, TX 77030, USA; Department of Urology, University of Washington, Seattle, WA 98109, USA
| | - Li Zhang
- Department of Urology, University of Washington, Seattle, WA 98109, USA
| | - Zhicheng Zhou
- Department of Urology, University of Washington, Seattle, WA 98109, USA
| | - Oh-Joon Kwon
- Department of Urology, University of Washington, Seattle, WA 98109, USA
| | - Yiqun Zhang
- Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
| | - Hoang Nguyen
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Center of Stem Cell and Regenerative Medicine, Baylor College of Medicine, Houston, TX 77030, USA
| | - Ruth Dumpit
- Human Biology Division, Fred Hutch Cancer Research Center, Seattle, WA 98109, USA
| | - Lawrence True
- Department of Pathology, University of Washington, Seattle, WA 98109, USA
| | - Peter Nelson
- Human Biology Division, Fred Hutch Cancer Research Center, Seattle, WA 98109, USA
| | - Baijun Dong
- Department of Urology, RenJi Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Wei Xue
- Department of Urology, RenJi Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Walter Birchmeier
- Max Delbrück Center for Molecular Medicine (MDC), Robert-Rössle-Str. 10, 13092 Berlin, Germany
| | - Makoto M Taketo
- Division of Experimental Therapeutics, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Feng Xu
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore
| | - Chad J Creighton
- Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA; Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA
| | - Michael M Ittmann
- Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA; Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX 77030, USA; Michael E. DeBakey Department of Veterans Affairs Medical Center, Houston, TX 77030, USA
| | - Li Xin
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Department of Urology, University of Washington, Seattle, WA 98109, USA; Institute of Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA.
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8
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Mostaghel EA, Zhang A, Hernandez S, Marck BT, Zhang X, Tamae D, Biehl HE, Tretiakova M, Bartlett J, Burns J, Dumpit R, Ang L, Matsumoto AM, Penning TM, Balk SP, Morrissey C, Corey E, True LD, Nelson PS. Contribution of Adrenal Glands to Intratumor Androgens and Growth of Castration-Resistant Prostate Cancer. Clin Cancer Res 2018; 25:426-439. [PMID: 30181386 DOI: 10.1158/1078-0432.ccr-18-1431] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 08/01/2018] [Accepted: 08/29/2018] [Indexed: 02/06/2023]
Abstract
PURPOSE Tumor androgens in castration-resistant prostate cancer (CRPC) reflect de novo intratumoral synthesis or adrenal androgens. We used C.B.-17 SCID mice in which we observed adrenal CYP17A activity to isolate the impact of adrenal steroids on CRPC tumors in vivo. EXPERIMENTAL DESIGN We evaluated tumor growth and androgens in LuCaP35CR and LuCaP96CR xenografts in response to adrenalectomy (ADX). We assessed protein expression of key steroidogenic enzymes in 185 CRPC metastases from 42 patients. RESULTS Adrenal glands of intact and castrated mice expressed CYP17A. Serum DHEA, androstenedione (AED), and testosterone (T) in castrated mice became undetectable after ADX (all P < 0.05). ADX prolonged median survival (days) in both CRPC models (33 vs. 179; 25 vs. 301) and suppressed tumor steroids versus castration alone (T 0.64 pg/mg vs. 0.03 pg/mg; DHT 2.3 pg/mg vs. 0.23 pg/mg; and T 0.81 pg/mg vs. 0.03 pg/mg, DHT 1.3 pg/mg vs. 0.04 pg/mg; all P ≤ 0.001). A subset of tumors recurred with increased steroid levels, and/or induction of androgen receptor (AR), truncated AR variants, and glucocorticoid receptor (GR). Metastases from 19 of 35 patients with AR positive tumors concurrently expressed enzymes for adrenal androgen utilization and nine expressed enzymes for de novo steroidogenesis (HSD3B1, CYP17A, AKR1C3, and HSD17B3). CONCLUSIONS Mice are appropriate for evaluating adrenal impact of steroidogenesis inhibitors. A subset of ADX-resistant CRPC tumors demonstrate de novo androgen synthesis. Tumor growth and androgens were suppressed more strongly by surgical ADX than prior studies using abiraterone, suggesting reduction in adrenally-derived androgens beyond that achieved by abiraterone may have clinical benefit. Proof-of-concept studies with agents capable of achieving true "nonsurgical ADX" are warranted.
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Affiliation(s)
- Elahe A Mostaghel
- Geriatric Research, Education and Clinical Center, VA Puget Sound Health Care System, Seattle, Washington. .,Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Ailin Zhang
- Fred Hutchinson Cancer Research Center, Seattle, Washington
| | | | - Brett T Marck
- Geriatric Research, Education and Clinical Center, VA Puget Sound Health Care System, Seattle, Washington
| | - Xiaotun Zhang
- Department of Urology, University of Washington, Seattle, Washington
| | - Daniel Tamae
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | | | - Maria Tretiakova
- Department of Pathology, University of Washington, Seattle, Washington
| | - Jon Bartlett
- Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - John Burns
- Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Ruth Dumpit
- Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Lisa Ang
- Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Alvin M Matsumoto
- Geriatric Research, Education and Clinical Center, VA Puget Sound Health Care System, Seattle, Washington
| | - Trevor M Penning
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Steven P Balk
- Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - Colm Morrissey
- Department of Urology, University of Washington, Seattle, Washington
| | - Eva Corey
- Department of Urology, University of Washington, Seattle, Washington
| | - Lawrence D True
- Department of Pathology, University of Washington, Seattle, Washington
| | - Peter S Nelson
- Fred Hutchinson Cancer Research Center, Seattle, Washington
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9
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Chalfin HJ, Glavaris SA, Malihi PD, Sperger JM, Gorin MA, Lu C, Goodwin CR, Chen Y, Caruso EA, Dumpit R, Kuhn P, Lang JM, Nelson PS, Luo J, Pienta KJ. Prostate Cancer Disseminated Tumor Cells are Rarely Detected in the Bone Marrow of Patients with Localized Disease Undergoing Radical Prostatectomy across Multiple Rare Cell Detection Platforms. J Urol 2018; 199:1494-1501. [PMID: 29339080 DOI: 10.1016/j.juro.2018.01.033] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/08/2018] [Indexed: 01/04/2023]
Abstract
PURPOSE Prostate circulating tumor cells escape into peripheral blood and enter bone marrow as disseminated tumor cells, representing an early step before conventionally detectable metastasis. It is unclear how frequently this occurs in localized disease and existing detection methods rely on epithelial markers with low specificity and sensitivity. We used multiple methodologies of disseminated tumor cell detection in bone marrow harvested at radical prostatectomy. MATERIALS AND METHODS Bone marrow was harvested from 208 clinically localized cases, 16 controls and 5 metastatic cases with peripheral blood obtained from 37 metastatic cases. Samples were evaluated at 4 centers with 4 distinct platforms using antibody enrichment with the AdnaTest (Qiagen®) or VERSA (versatile exclusion based rare sample analysis), or whole sample interrogation with the RareCyte platform (Seattle, Washington) or HD-SCA (high definition single cell assay) using traditional epithelial markers and prostate specific markers. We investigated the sensitivity and specificity of these markers by evaluating expression levels in control and metastatic cases. RESULTS EpCAM, NKX3.1 and AR were nonspecifically expressed in controls and in most samples using AdnaTest with no relation to perioperative variables. Only 1 patient with localized disease showed positive results for the prostate specific marker PSA. With the VERSA platform no localized case demonstrated disseminated tumor cells. With the RareCyte and HD-SCA platforms only a single patient had 1 disseminated tumor cell. CONCLUSIONS Evaluation across multiple platforms revealed that epithelial markers are nonspecific in bone marrow and, thus, not suitable for disseminated tumor cell detection. Using prostate specific markers disseminated tumor cells were typically not detected in patients with localized prostate cancer.
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Affiliation(s)
- Heather J Chalfin
- The James Buchanan Brady Urological Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland; Department of Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland.
| | - Stephanie A Glavaris
- The James Buchanan Brady Urological Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland; Department of Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Paymaneh D Malihi
- Bridge Institute, University of Southern California, Los Angeles, California
| | - Jamie M Sperger
- Department of Medicine, University of Wisconsin Carbone Cancer Center, Madison, Wisconsin
| | - Michael A Gorin
- The James Buchanan Brady Urological Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland; Department of Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Changxue Lu
- The James Buchanan Brady Urological Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland; Department of Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - C Rory Goodwin
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Yan Chen
- The James Buchanan Brady Urological Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland; Department of Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Emily A Caruso
- The James Buchanan Brady Urological Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland; Department of Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Ruth Dumpit
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Peter Kuhn
- Bridge Institute, University of Southern California, Los Angeles, California
| | - Joshua M Lang
- Department of Medicine, University of Wisconsin Carbone Cancer Center, Madison, Wisconsin
| | - Peter S Nelson
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Jun Luo
- The James Buchanan Brady Urological Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland; Department of Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Kenneth J Pienta
- The James Buchanan Brady Urological Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland; Department of Urology, Johns Hopkins University School of Medicine, Baltimore, Maryland
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10
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Hesk D, Borges S, Dumpit R, Hendershot S, Koharski D, McNamara P, Ren S, Saluja S, Truong V, Voronin K. Synthesis of 3 H, 2 H 4 , and 14 C-MK 3814 (preladenant). J Labelled Comp Radiopharm 2017; 60:194-199. [PMID: 28129428 DOI: 10.1002/jlcr.3490] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 01/06/2017] [Accepted: 01/24/2017] [Indexed: 11/09/2022]
Abstract
MK 3814 is a potent and selective antagonist of the A2a receptor. A2a receptor antagonists have the potential for the treatment of Parkinson disease. Three distinct isotopically labelled forms of MK 3814 were synthesized. [3 H]MK 3814 was prepared for a preliminary absorption, distribution, metabolism, and excretion data (ADME) evaluation of the compound and [14 C]MK 3814 for more definitive ADME work, including an absorption, metabolism, and excretion study in man. In addition, [2 H4 ]MK 3814 was prepared as an internal standard for a liquid chromatography mass spectrometry bioanalytical method. This paper discusses the synthesis of 3 isotopically labelled forms of MK 3814.
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Affiliation(s)
- D Hesk
- Labeled Compound Synthesis, Merck & Co., Inc., Rahway, NJ, USA
| | - S Borges
- Labeled Compound Synthesis, Merck & Co., Inc., Rahway, NJ, USA
| | - R Dumpit
- Labeled Compound Synthesis, Merck & Co., Inc., Rahway, NJ, USA
| | - S Hendershot
- Labeled Compound Synthesis, Merck & Co., Inc., Rahway, NJ, USA
| | - D Koharski
- Labeled Compound Synthesis, Merck & Co., Inc., Rahway, NJ, USA
| | - P McNamara
- Labeled Compound Synthesis, Merck & Co., Inc., Rahway, NJ, USA
| | - S Ren
- Labeled Compound Synthesis, Merck & Co., Inc., Rahway, NJ, USA
| | - S Saluja
- Labeled Compound Synthesis, Merck & Co., Inc., Rahway, NJ, USA
| | - V Truong
- Labeled Compound Synthesis, Merck & Co., Inc., Rahway, NJ, USA
| | - K Voronin
- Labeled Compound Synthesis, Merck & Co., Inc., Rahway, NJ, USA
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11
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Schech AJ, Sabnis GJ, Yu S, Njar VC, Jacoby DB, Nelson P, Dumpit R, Brodie AM. Abstract 3490: The effect of novel CYP17 inhibitor galeterone on gonadal and tumor progestogen and androgen levels in SCID mice bearing LNCaP prostate cancer xenografts. Cancer Res 2016. [DOI: 10.1158/1538-7445.am2016-3490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Prostate cancer growth is driven by androgen-dependent activation of the androgen receptor (AR). Inhibition of CYP17A1, a cytochrome P450 enzyme responsible for the conversion of progestogens to androgens, is a key strategy in the treatment of prostate cancer. CYP17A1 has both 17α-hydroxylase and 17,20-lyase function. The 17α-hydroxylase catalyzes the conversion of progesterone/pregnenolone to 17α-hydroxyprogesterone/17α-hydroxypregnenolone and the 17,20-lyase converts 17α-hydroxyprogesterone/17α-hydroxypregnenolone to androstenedione (AD)/dehydroepiandrosterone (DHEA). Galeterone, a novel AR degrader and antagonist, is also an inhibitor of CYP17A1 and has been shown to inhibit the growth of prostate cancer cells and tumors. However, the effects of galeterone on steroid levels affected by CYP17A1 inhibition have not been examined in vivo. Male SCID mice bearing LNCaP tumors were randomized to receive vehicle (30% beta-cyclodextran in saline) or 0.15mmol/kg galeterone (either po or sc). Mice were treated twice daily, seven days a week. Route of administration did not alter the efficacy of galeterone, which significantly reduced tumor volume (p = 0.044 and p = 0.049, sc, po). Upon completion of the experiment, tumors, testes, and plasma were collected for analysis of steroid levels. Analysis of intratumoral steroids showed an increase in progesterone (1.7- and 2-fold, sc, po) and a decrease in AD (89% and 77% reduction, sc, po). Similar results were observed in levels of pregnenolone which increased (1.4- and 3.0-fold, sc, po) while DHEA decreased (72% and 17% reduction, sc, po). Interestingly, levels of 17α-hydroxyprenenolone were increased in the sc treatment arm, suggesting selectivity of galeterone for the lyase over the hydroxylase catalytic function. Both routes of administration reduced intratumoral testosterone (97% and 77% reduction, sc, po). Intratesticular androgen levels showed similar trends compared to those in tumors. Following galeterone treatment, the levels of androgen precursors were higher in the testes than in the tumor (pregnenolone increased 2.3- and 1.5-fold sc, po; progesterone elevated 6.4- and 12.8-fold sc, po). Plasma androgen levels varied from those observed in the tumor and testes. However, galeterone treatment reduced the levels of AD (98% and 68% reduction, sc, po) and testosterone (99.6% and 99% reduction, sc, po). Together, these results show for the first time that galeterone specifically targets CYP17A1 in vivo as demonstrated by reduction of its enzymatic products DHEA, AD and testosterone. In addition, a selectivity for the lyase function was observed, as evidenced by greater decreases in DHEA and AD than in 17α-hydroxypregenelone. This is consistent with findings that patients treated with galeterone do not require cortisol replacement therapy and do not show symptoms of mineralocorticoid excess.
Citation Format: Amanda J. Schech, Gauri J. Sabnis, Stephen Yu, Vincent C.O. Njar, Douglas B. Jacoby, Peter Nelson, Ruth Dumpit, Angela M.H. Brodie. The effect of novel CYP17 inhibitor galeterone on gonadal and tumor progestogen and androgen levels in SCID mice bearing LNCaP prostate cancer xenografts. [abstract]. In: Proceedings of the 107th Annual Meeting of the American Association for Cancer Research; 2016 Apr 16-20; New Orleans, LA. Philadelphia (PA): AACR; Cancer Res 2016;76(14 Suppl):Abstract nr 3490.
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Affiliation(s)
| | | | - Stephen Yu
- 1Univ. of Maryland School of Medicine, Baltimore, MD
| | | | | | - Peter Nelson
- 3Fred Hutchinson Cancer Research Center, Seattle, WA
| | - Ruth Dumpit
- 3Fred Hutchinson Cancer Research Center, Seattle, WA
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12
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Zhang X, Coleman IM, Brown LG, True LD, Kollath L, Lucas JM, Lam HM, Dumpit R, Corey E, Chéry L, Lakely B, Higano CS, Montgomery B, Roudier M, Lange PH, Nelson PS, Vessella RL, Morrissey C. SRRM4 Expression and the Loss of REST Activity May Promote the Emergence of the Neuroendocrine Phenotype in Castration-Resistant Prostate Cancer. Clin Cancer Res 2015; 21:4698-708. [PMID: 26071481 DOI: 10.1158/1078-0432.ccr-15-0157] [Citation(s) in RCA: 129] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2015] [Accepted: 05/14/2015] [Indexed: 11/16/2022]
Abstract
PURPOSE The neuroendocrine phenotype is associated with the development of metastatic castration-resistant prostate cancer (CRPC). Our objective was to characterize the molecular features of the neuroendocrine phenotype in CRPC. EXPERIMENTAL DESIGN Expression of chromogranin A (CHGA), synaptophysin (SYP), androgen receptor (AR), and prostate-specific antigen (PSA) was analyzed by IHC in 155 CRPC metastases from 50 patients and in 24 LuCaP prostate cancer patient-derived xenografts (PDX). Seventy-one of 155 metastases and the 24 LuCaP xenograft lines were analyzed by whole-genome microarrays. REST splicing was verified by PCR. RESULTS Coexpression of CHGA and SYP in >30% of cells was observed in 22 of 155 metastases (9 patients); 11 of the 22 metastases were AR(+)/PSA(+) (6 patients), 11/22 were AR-/PSA- (4 patients), and 4/24 LuCaP PDXs were AR(-)/PSA(-). By IHC, of the 71 metastases analyzed by whole-genome microarrays, 5 metastases were CHGA(+)/SYP(+)/AR(-), and 5 were CHGA(+)/SYP(+)/AR(+). Only CHGA(+)/SYP(+) metastases had a neuroendocrine transcript signature. The neuronal transcriptional regulator SRRM4 transcript was associated with the neuroendocrine signature in CHGA(+)/SYP(+) metastases and all CHGA(+)/SYP(+) LuCaP xenografts. In addition, expression of SRRM4 in LuCaP neuroendocrine xenografts correlated with a splice variant of REST that lacks the transcriptional repressor domain. CONCLUSIONS (i) Metastatic neuroendocrine status can be heterogeneous in the same patient, (ii) the CRPC neuroendocrine molecular phenotype can be defined by CHGA(+)/SYP(+) dual positivity, (iii) the neuroendocrine phenotype is not necessarily associated with the loss of AR activity, and (iv) the splicing of REST by SRRM4 could promote the neuroendocrine phenotype in CRPC.
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Affiliation(s)
- Xiaotun Zhang
- Department of Urology, University of Washington, Seattle, Washington
| | - Ilsa M Coleman
- Divison of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Lisha G Brown
- Department of Urology, University of Washington, Seattle, Washington
| | - Lawrence D True
- Department of Pathology, University of Washington, Seattle, Washington
| | - Lori Kollath
- Department of Urology, University of Washington, Seattle, Washington
| | - Jared M Lucas
- Divison of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Hung-Ming Lam
- Department of Urology, University of Washington, Seattle, Washington
| | - Ruth Dumpit
- Divison of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Eva Corey
- Department of Urology, University of Washington, Seattle, Washington
| | - Lisly Chéry
- Department of Urology, University of Washington, Seattle, Washington
| | - Bryce Lakely
- Department of Urology, University of Washington, Seattle, Washington
| | - Celestia S Higano
- Department of Urology, University of Washington, Seattle, Washington. Department of Medicine, University of Washington, Seattle, Washington
| | - Bruce Montgomery
- Department of Medicine, University of Washington, Seattle, Washington
| | - Martine Roudier
- Department of Urology, University of Washington, Seattle, Washington
| | - Paul H Lange
- Department of Urology, University of Washington, Seattle, Washington. Department of Veterans Affairs Medical Center, Seattle, Washington
| | - Peter S Nelson
- Divison of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, Washington. Department of Medicine, University of Washington, Seattle, Washington
| | - Robert L Vessella
- Department of Urology, University of Washington, Seattle, Washington. Department of Veterans Affairs Medical Center, Seattle, Washington
| | - Colm Morrissey
- Department of Urology, University of Washington, Seattle, Washington.
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13
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Hesk D, Borges S, Dumpit R, Hendershot S, Koharski D, Lavey C, McNamara P, Voronin K. Synthesis of3H,13C,2H3,15N and14C-labelled SCH 466036, a histamine 3 receptor antagonist. J Labelled Comp Radiopharm 2015; 58:36-41. [DOI: 10.1002/jlcr.3261] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Revised: 12/03/2014] [Accepted: 12/14/2014] [Indexed: 11/09/2022]
Affiliation(s)
- D. Hesk
- Merck Research laboratories; Labeled Compound Synthesis, Department of Process Chemistry; 126 E. Lincoln Avenue, RY 80R Rahway NJ 07065 USA
| | - S. Borges
- Merck Research laboratories; Labeled Compound Synthesis, Department of Process Chemistry; 126 E. Lincoln Avenue, RY 80R Rahway NJ 07065 USA
| | - R. Dumpit
- Merck Research laboratories; Labeled Compound Synthesis, Department of Process Chemistry; 126 E. Lincoln Avenue, RY 80R Rahway NJ 07065 USA
| | - S. Hendershot
- Merck Research laboratories; Labeled Compound Synthesis, Department of Process Chemistry; 126 E. Lincoln Avenue, RY 80R Rahway NJ 07065 USA
| | - D. Koharski
- Merck Research laboratories; Labeled Compound Synthesis, Department of Process Chemistry; 126 E. Lincoln Avenue, RY 80R Rahway NJ 07065 USA
| | - C. Lavey
- Merck Research laboratories; Labeled Compound Synthesis, Department of Process Chemistry; 126 E. Lincoln Avenue, RY 80R Rahway NJ 07065 USA
| | - P. McNamara
- Merck Research laboratories; Labeled Compound Synthesis, Department of Process Chemistry; 126 E. Lincoln Avenue, RY 80R Rahway NJ 07065 USA
| | - K. Voronin
- Merck Research laboratories; Labeled Compound Synthesis, Department of Process Chemistry; 126 E. Lincoln Avenue, RY 80R Rahway NJ 07065 USA
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14
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Larson S, Zhang X, Dumpit R, Coleman I, Lakely B, Roudier M, Higano C, True LD, Lange PH, Montgomery B, Corey E, Nelson PS, Vessella RL, Morrissey C. Characterization of osteoblastic and osteolytic proteins in prostate cancer bone metastases. Prostate 2013; 73:932-40. [PMID: 23334979 PMCID: PMC4214278 DOI: 10.1002/pros.22639] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Accepted: 12/12/2012] [Indexed: 01/30/2023]
Abstract
BACKGROUND Approximately 90% of patients who die of Prostate Cancer (PCa) have bone metastases, which promote a spectrum of osteoblastic, osteolytic or mixed bone responses. Numerous secreted proteins have been reported to promote osteoblastic or osteolytic bone responses. We determined whether previously identified and/or novel proteins were associated with the osteoblastic or osteolytic response in clinical specimens of PCa bone metastases. METHODS Gene expression was analyzed on 14 PCa metastases from 11 patients by microarray profiling and qRT-PCR, and protein expression was analyzed on 33 PCa metastases from 30 patients by immunohistochemistry on highly osteoblastic and highly osteolytic bone specimens. RESULTS Transcript and protein levels of BMP-2, BMP-7, DKK-1, ET-1, and Sclerostin were not significantly different between osteoblastic and osteolytic metastases. However, levels of OPG, PGK1, and Substance P proteins were increased in osteoblastic samples. In addition, Emu1, MMP-12, and sFRP-1 were proteins identified with a novel role of being associated with either the osteoblastic or osteolytic bone response. CONCLUSIONS This is the first detailed analysis of bone remodeling proteins in human specimens of PCa bone metastases. Three proteins not previously shown to be involved may have a role in the PCa bone response. Furthermore, our data suggests that the relative expression of numerous, rather than a single, bone remodeling proteins determine the bone response in PCa bone metastases.
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Affiliation(s)
- Sandy Larson
- Department of Urology, University of Washington, Seattle, WA
| | - Xiaotun Zhang
- Department of Urology, University of Washington, Seattle, WA
| | - Ruth Dumpit
- Fred Hutchinson Cancer Research Center, Seattle, WA
| | - Ilsa Coleman
- Fred Hutchinson Cancer Research Center, Seattle, WA
| | - Bryce Lakely
- Department of Urology, University of Washington, Seattle, WA
| | - Martine Roudier
- Department of Pathology, University of Washington, Seattle, WA
| | - Celestia Higano
- Fred Hutchinson Cancer Research Center, Seattle, WA
- Department of Medicine, University of Washington, Seattle, WA
| | | | - Paul H. Lange
- Department of Urology, University of Washington, Seattle, WA
- Department of Veterans Affairs Medical Center, Seattle, WA
| | | | - Eva Corey
- Department of Urology, University of Washington, Seattle, WA
| | - Peter S. Nelson
- Fred Hutchinson Cancer Research Center, Seattle, WA
- Department of Medicine, University of Washington, Seattle, WA
| | - Robert L. Vessella
- Department of Urology, University of Washington, Seattle, WA
- Department of Veterans Affairs Medical Center, Seattle, WA
| | - Colm Morrissey
- Department of Urology, University of Washington, Seattle, WA
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Qu X, Randhawa G, Friedman C, O'Hara-Larrivee S, Kroeger K, Dumpit R, True L, Vakar-Lopez F, Porter C, Vessella R, Nelson P, Fang M. A novel four-color fluorescence in situ hybridization assay for the detection of TMPRSS2 and ERG rearrangements in prostate cancer. Cancer Genet 2013; 206:1-11. [PMID: 23352841 DOI: 10.1016/j.cancergen.2012.12.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 12/11/2012] [Accepted: 12/12/2012] [Indexed: 12/23/2022]
Abstract
Since the identification of the TMPRSS2-ERG rearrangement as the most common fusion event in prostate cancer, various methods have been developed to detect this rearrangement and to study its prognostic significance. We report a novel four-color fluorescence in situ hybridization (FISH) assay that detects not only the typical TMPRSS2-ERG fusion but also alternative rearrangements of the TMPRSS2 or ERG gene. We validated this assay on fresh, frozen, or formalin-fixed paraffin-embedded prostate cancer specimens, including cell lines, primary prostate cancer tissues, xenograft tissues derived from metastatic prostate cancer, and metastatic tissues from castration-resistant prostate cancer (CRPC) patients. When compared with either reverse transcription-polymerase chain reaction or the Gen-Probe method as the technical reference, analysis using the four-color FISH assay demonstrated an analytical sensitivity of 94.5% (95% confidence interval [CI] 0.80-0.99) and specificity of 100% (95% CI 0.89-1.00) for detecting the TMPRSS2-ERG fusion. The TMPRSS2-ERG fusion was detected in 41% and 43% of primary prostate cancer (n = 59) and CRPC tumors (n = 82), respectively. Rearrangements other than the typical TMPRSS2-ERG fusion were confirmed by karyotype analysis and found in 7% of primary cancer and 13% of CRPC tumors. Successful karyotype analyses are reported for the first time on four of the xenograft samples, complementing the FISH results. Analysis using the four-color FISH assay provides sensitive detection of TMPRSS2 and ERG gene rearrangements in prostate cancer.
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Affiliation(s)
- Xiaoyu Qu
- Fred Hutchinson Cancer Research Center, Seattle, WA, USA
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16
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Zhang X, Larson S, Dumpit R, Coleman I, Lakely B, Roudier M, Higano C, True LD, Lange PH, Nelson PS, Corey E, Vessella RL, Morrissey C. Abstract 1532: The identification of osteoblastic and osteolytic factors in prostate cancer bone metastases. Cancer Res 2012. [DOI: 10.1158/1538-7445.am2012-1532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Prostate Cancer (PCa) metastasizes to the bone in approximately 90% of patients who die of PCa. Growth of tumor cells in the bone can lead to replacement of bone marrow, spinal cord compression, severe bone pain, cachexia and death. The bone response to a metastasis can manifest as a spectrum of osteoblastic to osteoblastic/osteolytic (mixed) or osteolytic responses in the same patient at different biopsy sites. A number of proteins have been proposed to promote the osteoblastic and osteolytic responses in PCa bone metastasis. Our objective was to determine whether known bone forming and degrading factors are associated with the osteoblastic or osteolytic response in pre-clinical models and clinical specimens of PCa bone metastasis. Additionally, we wanted to identify novel proteins that may be associated with the osteoblastic and osteolytic response in PCa bone metastases. Using specimens obtained at rapid autopsy at the University of Washington, we compared the gene expression profile of osteoblastic and osteolytic metastases (n=14) from 13 patients and validated our findings by qRT-PCR. We also interrogated the same factors at the protein level in 18 osteoblastic and 18 osteolytic PCa bone metastases from 27 patients by immunohistochemistry (IHC). Additionally, we are currently interrogating the levels of these factors in 6 novel LuCaP xenograft models of PCa that promote an osteoblastic response and 4 that promote an osteolytic response in the tibia of immune compromised mice by IHC. Using gene expression arrays, validated by qRTPCR, we identified a putative osteoblastic factor EMID1 (p=0.01) and two putative osteolytic factors, MMP12 (p=0.03) and sFRP1 (p=0.02). By IHC, MMP12 expression approached significance (p=0.07), whereas sFRP1 was significantly higher in the osteolytic samples (p=0.02). Interestingly, we did not observed significant differences in transcript levels between osteoblastic and osteolytic metastases for a number of proposed osteoblastic and osteolytic factors including BMP2 and 7, tachykinin 1, endothelin 1, osteoprotegerin, and sclerostin. Furthermore, none of the proposed osteoblastic and osteolytic factors we interrogated by IHC showed a significant difference in protein expression between osteoblastic and osteolytic PCa bone metastases. This is the first detailed analysis of PCa osteoblastic and osteolytic factors in human specimens and animal models of PCa in the bone. Our data suggest that many of the factors important in bone remodeling may not be central to the bone response in PCa bone metastases. Additionally we have identified three factors that may have a role in bone remodeling in PCa bone metastases.
Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 103rd Annual Meeting of the American Association for Cancer Research; 2012 Mar 31-Apr 4; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2012;72(8 Suppl):Abstract nr 1532. doi:1538-7445.AM2012-1532
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Affiliation(s)
| | | | - Ruth Dumpit
- 2Fred Hutchinson Cancer Research Center, Seattle, WA
| | - Ilsa Coleman
- 2Fred Hutchinson Cancer Research Center, Seattle, WA
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- 1University of Washington, Seattle, WA
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Pritchard C, Mecham B, Dumpit R, Coleman I, Bhattacharjee M, Chen Q, Sikes RA, Nelson PS. Conserved Gene Expression Programs Integrate Mammalian Prostate Development and Tumorigenesis. Cancer Res 2009; 69:1739-47. [DOI: 10.1158/0008-5472.can-07-6817] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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18
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Risk M, Coleman I, Dumpit R, Gentleman R, Kristal AR, Knudsen BS, Nelson PS, Lin DW. Differential gene expression in normal prostate epithelium of men with and without prostate cancer. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.5142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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19
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Lin DW, Coleman IM, Hawley S, Huang CY, Dumpit R, Gifford D, Kezele P, Hung H, Knudsen BS, Kristal AR, Nelson PS. Influence of surgical manipulation on prostate gene expression: implications for molecular correlates of treatment effects and disease prognosis. J Clin Oncol 2006; 24:3763-70. [PMID: 16822846 DOI: 10.1200/jco.2005.05.1458] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
PURPOSE Measurements of tissue gene expression are increasingly used for disease stratification, clinical trial eligibility, and assessment of neoadjuvant therapy response. However, the method of tissue acquisition alone could significantly influence the expression of specific transcripts or proteins. This study examines whether there are transcript alterations associated with surgical resection of the prostate gland by radical retropubic prostatectomy. MATERIALS AND METHODS Twelve patients with clinically localized prostate cancer underwent immediate in situ prostate biopsy after induction of anesthesia for radical prostatectomy. Ex vivo prostate biopsies were performed immediately after surgical removal. Prostate epithelium was acquired by laser-capture microdissection, and transcript abundance levels were quantitated by cDNA microarray hybridization and confirmed by quantitative polymerase chain reaction. Data were analyzed by paired, two-sample t test using Statistical Analysis of Microarray algorithms, and linear models were fit as a function of clinical characteristics. RESULTS Of 5,753 cDNAs with measurable expression in prostate epithelium, 88 (1.5%) were altered as a result of surgery (false-discovery rate < or = 10%), representing 62 unique genes. These included transcripts encoding acute phase response proteins, IER2 and JUNB, and regulators of cell proliferation, p21Cip1 and KLF6. Of the clinical characteristics examined, including patient age, prostate volume, serum prostate-specific antigen, blood loss, and operative time, only gland volume was significantly and negatively associated with the magnitude of gene expression difference between pre- and postsurgical specimens. CONCLUSION Surgical manipulation results in significant gene expression changes. Molecular analyses of surgical samples should recognize that transcript alterations occur rapidly, and these results are important when designing and analyzing molecular correlates of clinical studies.
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Affiliation(s)
- Daniel W Lin
- Division of Human Biology, Fred Hutchinson Cancer Research Center, Seattle, WA, USA.
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20
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Lin DW, Coleman IM, Hawley S, Dumpit R, Gifford D, Hung H, Knudsen BS, Kristal AR, Nelson PS. 809: The Influence of Surgical Manipulation on Prostate Gene Expression: Implications for Molecular Correlates of Treatment Effects and Disease Prognosis. J Urol 2006. [DOI: 10.1016/s0022-5347(18)33045-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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21
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Mostaghel EA, Marks LS, Mazer N, Coleman I, Dumpit R, Nelson PS. 437: Quantitative Assessment of Prostate Gene Expression Changes Following Testosterone Supplementation. J Urol 2006. [DOI: 10.1016/s0022-5347(18)32693-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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22
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Abbott DE, Pritchard C, Clegg NJ, Ferguson C, Dumpit R, Sikes RA, Nelson PS. Expressed sequence tag profiling identifies developmental and anatomic partitioning of gene expression in the mouse prostate. Genome Biol 2003; 4:R79. [PMID: 14659016 PMCID: PMC329418 DOI: 10.1186/gb-2003-4-12-r79] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2003] [Revised: 10/28/2003] [Accepted: 11/12/2003] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND The prostate gland is an organ with highly specialized functional attributes that serves to enhance the fertility of mammalian species. Much of the information pertaining to normal and pathological conditions affecting the prostate has been obtained through extensive developmental, biochemical and genetic analyses of rodent species. Although important insights can be obtained through detailed anatomical and histological assessments of mouse and rat models, further mechanistic explanations are greatly aided through studies of gene and protein expression. RESULTS In this article we characterize the repertoire of genes expressed in the normal developing mouse prostate through the analysis of 50,562 expressed sequence tags derived from 14 mouse prostate cDNA libraries. Sequence assemblies and annotations identified 15,009 unique transcriptional units of which more than 600 represent high quality assemblies without corresponding annotations in public gene expression databases. Quantitative analyses demonstrate distinct anatomical and developmental partitioning of prostate gene expression. This finding may assist in the interpretation of comparative studies between human and mouse and guide the development of new transgenic murine disease models. The identification of several novel genes is reported, including a new member of the beta-defensin gene family with prostate-restricted expression. CONCLUSIONS These findings suggest a potential role for the prostate as a defensive barrier for entry of pathogens into the genitourinary tract and, further, serve to emphasize the utility of the continued evaluation of transcriptomes from a diverse repertoire of tissues and cell types.
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Affiliation(s)
- Denise E Abbott
- Division of Human Biology, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, WA 98109, USA
| | - Colin Pritchard
- Division of Human Biology, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, WA 98109, USA
| | - Nigel J Clegg
- Division of Human Biology, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, WA 98109, USA
| | - Camari Ferguson
- Division of Human Biology, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, WA 98109, USA
| | - Ruth Dumpit
- Division of Human Biology, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, WA 98109, USA
| | - Robert A Sikes
- Laboratory for Cancer Ontogeny and Therapeutics, Department of Biological Sciences, University of Delaware, Newark, DE 19716, USA
| | - Peter S Nelson
- Division of Human Biology, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, WA 98109, USA
- Division of Clinical Research, Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue North, Seattle, WA 98109, USA
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