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Jiménez N, Garcia de Herreros M, Reig Ò, Marín-Aguilera M, Aversa C, Ferrer-Mileo L, García-Esteve S, Rodríguez-Carunchio L, Trias I, Font A, Rodriguez-Vida A, Climent MÁ, Cros S, Chirivella I, Domènech M, Figols M, Carles J, Suárez C, Herrero Rivera D, González-Billalabeitia E, Cívico C, Sala-González N, Ruiz de Porras V, Ribal MJ, Prat A, Mellado B. Development and Independent Validation of a Prognostic Gene Expression Signature Based on RB1, PTEN, and TP53 in Metastatic Hormone-sensitive Prostate Cancer Patients. Eur Urol Oncol 2024; 7:954-964. [PMID: 38429210 DOI: 10.1016/j.euo.2023.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/30/2023] [Accepted: 12/29/2023] [Indexed: 03/03/2024]
Abstract
BACKGROUND Androgen deprivation therapy (ADT) with docetaxel (D) and/or antiandrogen receptor therapies (ARTs) are the standard therapies in metastatic hormone-sensitive prostate cancer (mHSPC). Alterations in the tumor suppressor genes (TSGs) RB1, PTEN, and TP53 are associated with an aggressive evolution and treatment resistance in castration-resistant prostate cancer (CRPC). OBJECTIVE To study the clinical implications of TSG mRNA expression in mHSPC patients. DESIGN, SETTING, AND PARTICIPANTS This is a multicenter retrospective biomarker study in mHSPC patients. TSGlow status was defined when two or more out of the three TSGs presented low RNA expression by nCounter in formalin-fixed paraffin-embedded samples and TSGwt for the remaining cases. The microarray data from the CHAARTED trial were analyzed as an independent validation cohort. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS Molecular data were correlated with CRPC-free survival (CRPC-FS) and overall survival (OS) by the Kaplan-Meier method and multivariate Cox analysis. RESULTS AND LIMITATIONS A total of 226 patients were included, of whom 218 were eligible: 93 were treated with ADT and 125 with ADT + D; 75.7% presented de novo stage IV and 67.9% high-volume disease. TSGlow (19.2%) was independently correlated with shorter CRPC-FS (hazard ratio [HR] 1.8, p = 0.002) and OS (HR 2, p = 0.002). In the CHAARTED trial, TSGlow was independently correlated with lower CRPC-FS (HR 2.2, p = 0.02); no differences in clinical outcomes according to treatment were observed in TSGlow patients, while a significant benefit was observed for ADT + D in the TSGwt group for CRPC-FS (HR 0.4, p < 0.001) and OS (HR 0.4, p = 0.001). However, no interaction was observed between TSG signature and treatment in either series. Study limitations are the retrospective design, small sample size, and lack of inclusion of patients treated with ADT + ART. CONCLUSIONS TSGlow expression correlates with adverse outcomes in patients with mHSPC. The investigation of new therapeutic strategies in these patients is warranted. PATIENT SUMMARY The low RNA expression of tumor suppressor genes in the tumors is correlated with adverse outcomes in patients with metastatic hormone-sensitive prostate cancer.
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Affiliation(s)
- Natalia Jiménez
- Translational Genomics and Targeted Therapeutics in Solid Tumors Lab, Fundació de Recerca Clínic Barcelona - Institut d'Investigacions Biomèdiques August Pi i Sunyer (FRCB-IDIBAPS), Barcelona, Spain
| | - Marta Garcia de Herreros
- Translational Genomics and Targeted Therapeutics in Solid Tumors Lab, Fundació de Recerca Clínic Barcelona - Institut d'Investigacions Biomèdiques August Pi i Sunyer (FRCB-IDIBAPS), Barcelona, Spain; Medical Oncology Department, Hospital Clínic, Barcelona, Spain
| | - Òscar Reig
- Translational Genomics and Targeted Therapeutics in Solid Tumors Lab, Fundació de Recerca Clínic Barcelona - Institut d'Investigacions Biomèdiques August Pi i Sunyer (FRCB-IDIBAPS), Barcelona, Spain; Medical Oncology Department, Hospital Clínic, Barcelona, Spain; Uro-Oncology Unit, Hospital Clínic, University of Barcelona, Barcelona, Spain; Department of Medicine, University of Barcelona, Barcelona, Spain
| | - Mercedes Marín-Aguilera
- Translational Genomics and Targeted Therapeutics in Solid Tumors Lab, Fundació de Recerca Clínic Barcelona - Institut d'Investigacions Biomèdiques August Pi i Sunyer (FRCB-IDIBAPS), Barcelona, Spain; Medical Oncology Department, Hospital Clínic, Barcelona, Spain
| | - Caterina Aversa
- Translational Genomics and Targeted Therapeutics in Solid Tumors Lab, Fundació de Recerca Clínic Barcelona - Institut d'Investigacions Biomèdiques August Pi i Sunyer (FRCB-IDIBAPS), Barcelona, Spain; Medical Oncology Department, Hospital Clínic, Barcelona, Spain; Uro-Oncology Unit, Hospital Clínic, University of Barcelona, Barcelona, Spain
| | - Laura Ferrer-Mileo
- Translational Genomics and Targeted Therapeutics in Solid Tumors Lab, Fundació de Recerca Clínic Barcelona - Institut d'Investigacions Biomèdiques August Pi i Sunyer (FRCB-IDIBAPS), Barcelona, Spain; Medical Oncology Department, Hospital Clínic, Barcelona, Spain; Uro-Oncology Unit, Hospital Clínic, University of Barcelona, Barcelona, Spain
| | - Samuel García-Esteve
- Translational Genomics and Targeted Therapeutics in Solid Tumors Lab, Fundació de Recerca Clínic Barcelona - Institut d'Investigacions Biomèdiques August Pi i Sunyer (FRCB-IDIBAPS), Barcelona, Spain; Department of Medicine, University of Barcelona, Barcelona, Spain
| | - Leonardo Rodríguez-Carunchio
- Uro-Oncology Unit, Hospital Clínic, University of Barcelona, Barcelona, Spain; Department of Pathology, Hospital Clínic, Barcelona, Spain
| | - Isabel Trias
- Uro-Oncology Unit, Hospital Clínic, University of Barcelona, Barcelona, Spain; Department of Pathology, Hospital Clínic, Barcelona, Spain
| | - Albert Font
- Medical Oncology Department, Institut Català d'Oncologia, Hospital Germans Trias i Pujol, Badalona, Spain
| | - Alejo Rodriguez-Vida
- Medical Oncology Department, Institut Hospital del Mar d'Investigacions Mèdiques (IMIM), Hospital del Mar, Barcelona, Spain
| | - Miguel Ángel Climent
- Medical Oncology Service, Instituto Valenciano de Oncología (IVO), Valencia, Spain
| | - Sara Cros
- Medical Oncology Department, Hospital General de Granollers, Barcelona, Spain
| | - Isabel Chirivella
- Oncology Department, Hospital Clínico Universitario de Valencia, Valencia, Spain
| | - Montserrat Domènech
- Medical Oncology Department, Fundació Althaia, Xarxa Assistencial Universitària de Manresa, Spain
| | - Mariona Figols
- Medical Oncology Department, Fundació Althaia, Xarxa Assistencial Universitària de Manresa, Spain
| | - Joan Carles
- Vall d'Hebron Institute of Oncology, Vall d'Hebron University Hospital, Barcelona, Spain
| | - Cristina Suárez
- Vall d'Hebron Institute of Oncology, Vall d'Hebron University Hospital, Barcelona, Spain
| | | | | | - Claudia Cívico
- Department of Hematology and Medical Oncology, Hospital Universitario Morales Meseguer, IMIB-Universidad de Murcia, Murcia, Spain
| | | | - Vicenç Ruiz de Porras
- Badalona Applied Research Group in Oncology (B-ARGO), Institut Català d'Oncologia - Germans Trias i Pujol Research Institute, Badalona, Spain
| | - Maria J Ribal
- Department of Urology, Hospital Clínic, Barcelona, Spain
| | - Aleix Prat
- Translational Genomics and Targeted Therapeutics in Solid Tumors Lab, Fundació de Recerca Clínic Barcelona - Institut d'Investigacions Biomèdiques August Pi i Sunyer (FRCB-IDIBAPS), Barcelona, Spain; Medical Oncology Department, Hospital Clínic, Barcelona, Spain; Department of Medicine, University of Barcelona, Barcelona, Spain
| | - Begoña Mellado
- Translational Genomics and Targeted Therapeutics in Solid Tumors Lab, Fundació de Recerca Clínic Barcelona - Institut d'Investigacions Biomèdiques August Pi i Sunyer (FRCB-IDIBAPS), Barcelona, Spain; Medical Oncology Department, Hospital Clínic, Barcelona, Spain; Uro-Oncology Unit, Hospital Clínic, University of Barcelona, Barcelona, Spain; Department of Medicine, University of Barcelona, Barcelona, Spain.
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2
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Aparicio AM, Tidwell RSS, Yadav SS, Chen JS, Zhang M, Liu J, Guo S, Pilié PG, Yu Y, Song X, Vundavilli H, Jindal S, Zhu K, Viscuse PV, Lebenthal JM, Hahn AW, Soundararajan R, Corn PG, Zurita AJ, Subudhi SK, Zhang J, Wang W, Huff C, Troncoso P, Allison JP, Sharma P, Logothetis CJ. A Modular Trial of Androgen Signaling Inhibitor Combinations Testing a Risk-Adapted Strategy in Patients with Metastatic Castration-Resistant Prostate Cancer. Clin Cancer Res 2024; 30:2751-2763. [PMID: 38683200 PMCID: PMC11216872 DOI: 10.1158/1078-0432.ccr-23-3740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 02/13/2024] [Accepted: 04/22/2024] [Indexed: 05/01/2024]
Abstract
PURPOSE To determine the efficacy and safety of risk-adapted combinations of androgen signaling inhibitors and inform disease classifiers for metastatic castration-resistant prostate cancers. PATIENTS AND METHODS In a modular, randomized phase II trial, 192 men were treated with 8 weeks of abiraterone acetate, prednisone, and apalutamide (AAPA; module 1) and then allocated to modules 2 or 3 based on satisfactory (≥50% PSA decline from baseline and <5 circulating tumor cell/7.5 mL) versus unsatisfactory status. Men in the former were randomly assigned to continue AAPA alone (module 2A) or with ipilimumab (module 2B). Men in the latter group had carboplatin + cabazitaxel added to AAPA (module 3). Optional baseline biopsies were subjected to correlative studies. RESULTS Median overall survival (from allocation) was 46.4 [95% confidence interval (CI), 39.2-68.2], 41.4 (95% CI, 33.3-49.9), and 18.7 (95% CI, 14.3-26.3) months in modules 2A (n = 64), 2B (n = 64), and 3 (n = 59), respectively. Toxicities were within expectations. Of 192 eligible patients, 154 (80.2%) underwent pretreatment metastatic biopsies. The aggressive-variant prostate cancer molecular profile (defects in ≥2 of p53, RB1, and PTEN) was associated with unsatisfactory status. Exploratory analyses suggested that secreted phosphoprotein 1-positive and insulin-like growth factor-binding protein 2-positive macrophages, druggable myeloid cell markers, and germline pathogenic mutations were enriched in the unsatisfactory group. CONCLUSIONS Adding ipilimumab to AAPA did not improve outcomes in men with androgen-responsive metastatic castration-resistant prostate cancer. Despite the addition of carboplatin + cabazitaxel, men in the unsatisfactory group had shortened survivals. Adaptive designs can enrich for biologically and clinically relevant disease subgroups to contribute to the development of marker-informed, risk-adapted therapy strategies in men with prostate cancer.
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Affiliation(s)
- Ana M. Aparicio
- Department of Genitourinary Medical Oncology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Rebecca S. S. Tidwell
- Department of Biostatistics; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Shalini S. Yadav
- Department of Immunology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Jiun-Sheng Chen
- Department of Immunology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Miao Zhang
- Department of Anatomical Pathology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Jingjing Liu
- Department of Genomic Medicine; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Shuai Guo
- Department of Bioinformatics and Computational Biology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Patrick G. Pilié
- Department of Genitourinary Medical Oncology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Yao Yu
- Department of Epidemiology, University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA
| | - Xingzhi Song
- Department of Genomic Medicine; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Haswanth Vundavilli
- Department of Bioinformatics and Computational Biology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Sonali Jindal
- Department of Immunology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Keyi Zhu
- Department of Anatomical Pathology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Paul V. Viscuse
- Department of Genitourinary Medical Oncology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Justin M. Lebenthal
- Department of Genitourinary Medical Oncology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Andrew W. Hahn
- Department of Genitourinary Medical Oncology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Rama Soundararajan
- Department of Translational Molecular Pathology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Paul G. Corn
- Department of Genitourinary Medical Oncology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Amado J. Zurita
- Department of Genitourinary Medical Oncology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Sumit K. Subudhi
- Department of Genitourinary Medical Oncology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Jianhua Zhang
- Department of Genomic Medicine; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Wenyi Wang
- Department of Bioinformatics and Computational Biology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Chad Huff
- Department of Epidemiology, University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA
| | - Patricia Troncoso
- Department of Anatomical Pathology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - James P. Allison
- Department of Immunology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Padmanee Sharma
- Department of Genitourinary Medical Oncology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
- Department of Immunology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Christopher J. Logothetis
- Department of Genitourinary Medical Oncology; University of Texas MD Anderson Cancer Center, Houston, Texas, USA
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Kouroukli O, Bravou V, Giannitsas K, Tzelepi V. Tissue-Based Diagnostic Biomarkers of Aggressive Variant Prostate Cancer: A Narrative Review. Cancers (Basel) 2024; 16:805. [PMID: 38398199 PMCID: PMC10887410 DOI: 10.3390/cancers16040805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 02/10/2024] [Accepted: 02/12/2024] [Indexed: 02/25/2024] Open
Abstract
Prostate cancer (PC) is a common malignancy among elderly men, characterized by great heterogeneity in its clinical course, ranging from an indolent to a highly aggressive disease. The aggressive variant of prostate cancer (AVPC) clinically shows an atypical pattern of disease progression, similar to that of small cell PC (SCPC), and also shares the chemo-responsiveness of SCPC. The term AVPC does not describe a specific histologic subtype of PC but rather the group of tumors that, irrespective of morphology, show an aggressive clinical course, dictated by androgen receptor (AR) indifference. AR indifference represents an adaptive response to androgen deprivation therapy (ADT), driven by epithelial plasticity, an inherent ability of tumor cells to adapt to their environment by changing their phenotypic characteristics in a bi-directional way. The molecular profile of AVPC entails combined alterations in the tumor suppressor genes retinoblastoma protein 1 (RB1), tumor protein 53 (TP53), and phosphatase and tensin homolog (PTEN). The understanding of the biologic heterogeneity of castration-resistant PC (CRPC) and the need to identify the subset of patients that would potentially benefit from specific therapies necessitate the development of prognostic and predictive biomarkers. This review aims to discuss the possible pathophysiologic mechanisms of AVPC development and the potential use of emerging tissue-based biomarkers in clinical practice.
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Affiliation(s)
- Olga Kouroukli
- Department of Pathology, Evaggelismos General Hospital, 10676 Athens, Greece
| | - Vasiliki Bravou
- Department of Anatomy-Histology-Embryology, School of Medicine, University of Patras, 26504 Patras, Greece;
| | | | - Vasiliki Tzelepi
- Department of Pathology, School of Medicine, University of Patras, 26504 Patras, Greece
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4
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Viscuse PV, Slack-Tidwell RS, Zhang M, Rohra P, Zhu K, San Lucas FA, Konnick E, Pilie PG, Siddiqui B, Logothetis CJ, Corn P, Subudhi SK, Pritchard CC, Soundararajan R, Aparicio A. Evaluation of the Aggressive-Variant Prostate Cancer Molecular Signature in Clinical Laboratory Improvement Amendments (CLIA) Environments. Cancers (Basel) 2023; 15:5843. [PMID: 38136389 PMCID: PMC10741546 DOI: 10.3390/cancers15245843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 11/30/2023] [Accepted: 12/01/2023] [Indexed: 12/24/2023] Open
Abstract
Aggressive-variant prostate cancers (AVPCs) are a subset of metastatic castrate-resistant prostate cancers (mCRPCs) characterized by defects in ≥ two of three of TP53, RB1, and PTEN (AVPCm), a profile linked to lineage plasticity, androgen indifference, and platinum sensitivity. Men with mCRPC undergoing biopsies for progression were assessed for AVPCm using immunohistochemistry (IHC), next-generation sequencing (NGS) of solid tumor DNA (stDNA), and NGS of circulating tumor DNA (ctDNA) assays in CLIA-certified labs. Biopsy characteristics, turnaround times, inter-reader concordance, and inter-assay concordance were assessed. AVPCm was detected in 13 (27%) patients via IHC, two (6%) based on stDNA, and seven (39%) based on ctDNA. The concordance of the IHC reads between pathologists was variable. IHC had a higher detection rate of AVPCm+ tumors with the shortest turnaround times. stDNA had challenges with copy number loss detection, limiting its detection rate. ctDNA detected the greatest proportion of AVPCm+ tumors but had a low tumor content in two thirds of patients. These data show the operational characteristics of AVPCm detection using various assays, and inform trial design using AVPCm as a criterion for patient selection or stratification.
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Affiliation(s)
- Paul V. Viscuse
- Department of Medicine, University of Virginia, Charlottesville, VA 22903, USA;
| | - Rebecca S. Slack-Tidwell
- Department of Biostatistics, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Miao Zhang
- Department of Pathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA (K.Z.)
| | - Prih Rohra
- Department of Pathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA (K.Z.)
| | - Keyi Zhu
- Department of Pathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA (K.Z.)
| | - F. Anthony San Lucas
- Department of Hematopathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Eric Konnick
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA 98195, USA; (E.K.)
| | - Patrick G. Pilie
- Department of Genitourinary Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Bilal Siddiqui
- Department of Genitourinary Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Christopher J. Logothetis
- Department of Genitourinary Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Paul Corn
- Department of Genitourinary Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Sumit K. Subudhi
- Department of Genitourinary Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Colin C. Pritchard
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA 98195, USA; (E.K.)
| | - Rama Soundararajan
- Department of Translational Molecular Pathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA;
| | - Ana Aparicio
- Department of Genitourinary Medical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
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5
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Logotheti S, Papadaki E, Zolota V, Logothetis C, Vrahatis AG, Soundararajan R, Tzelepi V. Lineage Plasticity and Stemness Phenotypes in Prostate Cancer: Harnessing the Power of Integrated "Omics" Approaches to Explore Measurable Metrics. Cancers (Basel) 2023; 15:4357. [PMID: 37686633 PMCID: PMC10486655 DOI: 10.3390/cancers15174357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/21/2023] [Accepted: 08/25/2023] [Indexed: 09/10/2023] Open
Abstract
Prostate cancer (PCa), the most frequent and second most lethal cancer type in men in developed countries, is a highly heterogeneous disease. PCa heterogeneity, therapy resistance, stemness, and lethal progression have been attributed to lineage plasticity, which refers to the ability of neoplastic cells to undergo phenotypic changes under microenvironmental pressures by switching between developmental cell states. What remains to be elucidated is how to identify measurements of lineage plasticity, how to implement them to inform preclinical and clinical research, and, further, how to classify patients and inform therapeutic strategies in the clinic. Recent research has highlighted the crucial role of next-generation sequencing technologies in identifying potential biomarkers associated with lineage plasticity. Here, we review the genomic, transcriptomic, and epigenetic events that have been described in PCa and highlight those with significance for lineage plasticity. We further focus on their relevance in PCa research and their benefits in PCa patient classification. Finally, we explore ways in which bioinformatic analyses can be used to determine lineage plasticity based on large omics analyses and algorithms that can shed light on upstream and downstream events. Most importantly, an integrated multiomics approach may soon allow for the identification of a lineage plasticity signature, which would revolutionize the molecular classification of PCa patients.
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Affiliation(s)
- Souzana Logotheti
- Department of Pathology, University of Patras, 26504 Patras, Greece; (S.L.); (E.P.); (V.Z.)
| | - Eugenia Papadaki
- Department of Pathology, University of Patras, 26504 Patras, Greece; (S.L.); (E.P.); (V.Z.)
- Department of Informatics, Ionian University, 49100 Corfu, Greece;
| | - Vasiliki Zolota
- Department of Pathology, University of Patras, 26504 Patras, Greece; (S.L.); (E.P.); (V.Z.)
| | - Christopher Logothetis
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA;
| | | | - Rama Soundararajan
- Department of Translational Molecular Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Vasiliki Tzelepi
- Department of Pathology, University of Patras, 26504 Patras, Greece; (S.L.); (E.P.); (V.Z.)
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6
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Zielske SP, Chen W, Ibrahim KG, Cackowski FC. SNHG1 opposes quiescence and promotes docetaxel sensitivity in prostate cancer. BMC Cancer 2023; 23:672. [PMID: 37464317 DOI: 10.1186/s12885-023-11006-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 05/25/2023] [Indexed: 07/20/2023] Open
Abstract
BACKGROUND A majority of prostate cancer cells are in a non-proliferating, G0 (quiescent) phase of the cell cycle and may lie dormant for years before activation into a proliferative, rapidly progressing, disease phase. Many mechanisms which influence proliferation and quiescence choices remain to be elucidated, including the role of non-coding RNAs. In this study, we investigated the role of a long non-coding RNA (lncRNA), SNHG1, on cell proliferation, quiescence, and sensitivity to docetaxel as a potential factor important in prostate cancer biology. METHODS Publically available, anonymous, clinical data was obtained from cBioPortal for analysis. RNAi and prostate cancer cell lines were utilized to investigate SNHG1 in vitro. We measured G0 cells, DNA synthesis, and cell cycle distribution by flow cytometry. Western blotting was used to assess G2 arrest and apoptosis. These parameters were also investigated following docetaxel treatment. RESULTS We discovered that in prostate cancer patients from The Cancer Genome Atlas (TCGA) data set, high SNHG1 expression in localized tumors correlated with reduced progression-free survival, and in a data set of both primary and metastatic tumors, high SNHG1 expression was associated with metastatic tumors. In vitro analysis of prostate cancer cell lines showed SNHG1 expression correlated with a quiescent versus proliferative phenotype. Knockdown of SNHG1 by RNAi in PC3 and C4-2B cells resulted in an accumulation of cells in the G0 phase. After knockdown, 60.0% of PC3 cells were in G0, while control cultures had 13.2% G0. There were reciprocal decreases in G1 phase, but little impact on the proportion of cells in S and G2/M phases, depending on cell line. DNA synthesis and proliferation were largely halted- decreasing by 75% and 81% in C4-2B and PC3 cells, respectively. When cells were treated with docetaxel, SNHG1-depleted C4-2B and PC3 cells were resistant to G2 arrest, and displayed reduced apoptosis, as indicated by reduced cyclin B1 and cleaved caspase 3, suggesting SNHG1 levels may modulate drug response. CONCLUSIONS Overall, these results indicate SNHG1 has complex roles in prostate cancer, as it stimulates cell cycle entry and disease progression, but sensitizes cells to docetaxel treatment.
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Affiliation(s)
- Steven P Zielske
- Department of Oncology, Wayne State University and Karmanos Cancer Institute, 4100 John R, MI, 48201, Detroit, USA
| | - Wei Chen
- Department of Oncology, Wayne State University and Karmanos Cancer Institute, 4100 John R, MI, 48201, Detroit, USA
| | - Kristina G Ibrahim
- Department of Oncology, Wayne State University and Karmanos Cancer Institute, 4100 John R, MI, 48201, Detroit, USA
| | - Frank C Cackowski
- Department of Oncology, Wayne State University and Karmanos Cancer Institute, 4100 John R, MI, 48201, Detroit, USA.
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