Try a new search

Format these results:

Searched for:



Total Results:


Androgen Receptor Pathway-Independent Prostate Cancer Is Sustained through FGF Signaling

Bluemn, Eric G; Coleman, Ilsa M; Lucas, Jared M; Coleman, Roger T; Hernandez-Lopez, Susana; Tharakan, Robin; Bianchi-Frias, Daniella; Dumpit, Ruth F; Kaipainen, Arja; Corella, Alexandra N; Yang, Yu Chi; Nyquist, Michael D; Mostaghel, Elahe; Hsieh, Andrew C; Zhang, Xiaotun; Corey, Eva; Brown, Lisha G; Nguyen, Holly M; Pienta, Kenneth; Ittmann, Michael; Schweizer, Michael; True, Lawrence D; Wise, David; Rennie, Paul S; Vessella, Robert L; Morrissey, Colm; Nelson, Peter S
Androgen receptor (AR) signaling is a distinctive feature of prostate carcinoma (PC) and represents the major therapeutic target for treating metastatic prostate cancer (mPC). Though highly effective, AR antagonism can produce tumors that bypass a functional requirement for AR, often through neuroendocrine (NE) transdifferentiation. Through the molecular assessment of mPCs over two decades, we find a phenotypic shift has occurred in mPC with the emergence of an AR-null NE-null phenotype. These "double-negative" PCs are notable for elevated FGF and MAPK pathway activity, which can bypass AR dependence. Pharmacological inhibitors of MAPK or FGFR repressed the growth of double-negative PCs in vitro and in vivo. Our results indicate that FGF/MAPK blockade may be particularly efficacious against mPCs with an AR-null phenotype.
PMID: 29017058
ISSN: 1878-3686
CID: 2758612

Myc regulates a transcriptional program that stimulates mitochondrial glutaminolysis and leads to glutamine addiction

Wise, David R; DeBerardinis, Ralph J; Mancuso, Anthony; Sayed, Nabil; Zhang, Xiao-Yong; Pfeiffer, Harla K; Nissim, Ilana; Daikhin, Evgueni; Yudkoff, Marc; McMahon, Steven B; Thompson, Craig B
Mammalian cells fuel their growth and proliferation through the catabolism of two main substrates: glucose and glutamine. Most of the remaining metabolites taken up by proliferating cells are not catabolized, but instead are used as building blocks during anabolic macromolecular synthesis. Investigations of phosphoinositol 3-kinase (PI3K) and its downstream effector AKT have confirmed that these oncogenes play a direct role in stimulating glucose uptake and metabolism, rendering the transformed cell addicted to glucose for the maintenance of survival. In contrast, less is known about the regulation of glutamine uptake and metabolism. Here, we report that the transcriptional regulatory properties of the oncogene Myc coordinate the expression of genes necessary for cells to engage in glutamine catabolism that exceeds the cellular requirement for protein and nucleotide biosynthesis. A consequence of this Myc-dependent glutaminolysis is the reprogramming of mitochondrial metabolism to depend on glutamine catabolism to sustain cellular viability and TCA cycle anapleurosis. The ability of Myc-expressing cells to engage in glutaminolysis does not depend on concomitant activation of PI3K or AKT. The stimulation of mitochondrial glutamine metabolism resulted in reduced glucose carbon entering the TCA cycle and a decreased contribution of glucose to the mitochondrial-dependent synthesis of phospholipids. These data suggest that oncogenic levels of Myc induce a transcriptional program that promotes glutaminolysis and triggers cellular addiction to glutamine as a bioenergetic substrate.
PMID: 19033189
ISSN: 1091-6490
CID: 2484092

Glutamine addiction: a new therapeutic target in cancer

Wise, David R; Thompson, Craig B
Most cancers depend on a high rate of aerobic glycolysis for their continued growth and survival. Paradoxically, some cancer cell lines also display addiction to glutamine despite the fact that glutamine is a nonessential amino acid that can be synthesized from glucose. The high rate of glutamine uptake exhibited by glutamine-dependent cells does not appear to result solely from its role as a nitrogen donor in nucleotide and amino acid biosynthesis. Instead, glutamine plays a required role in the uptake of essential amino acids and in maintaining activation of TOR (target of rapamycin) kinase. Moreover, in many cancer cells, glutamine is the primary mitochondrial substrate and is required for maintenance of mitochondrial membrane potential and integrity and for support of the NADPH production needed for redox control and macromolecular synthesis.
PMID: 20570523
ISSN: 0968-0004
CID: 2484082

High-volume prostate biopsy core involvement is not associated with an increased risk of cancer recurrence following 5-fraction stereotactic body radiation therapy monotherapy

Lischalk, Jonathan W; Sanchez, Astrid; Santos, Vianca F; Mendez, Christopher; Akerman, Meredith; Carpenter, Todd; Tam, Moses; Byun, David; Wise, David R; Mahadevan, Anand; Evans, Andrew; Huang, William; Katz, Aaron; Lepor, Herbert; Haas, Jonathan A
PURPOSE/OBJECTIVE:Percentage of positive cores involved on a systemic prostate biopsy has been established as a risk factor for adverse oncologic outcomes and is a National Comprehensive Cancer Network (NCCN) independent parameter for unfavorable intermediate-risk disease. Most data from a radiation standpoint was published in an era of conventional fractionation. We explore whether the higher biological dose delivered with SBRT can mitigate this risk factor. METHODS:A large single institutional database was interrogated to identify all patients diagnosed with localized prostate cancer (PCa) treated with 5-fraction SBRT without ADT. Pathology results were reviewed to determine detailed core involvement as well as Gleason score (GS). High-volume biopsy core involvement was defined as ≥ 50%. Weighted Gleason core involvement was reviewed, giving higher weight to higher-grade cancer. The PSA kinetics and oncologic outcomes were analyzed for association with core involvement. RESULTS:From 2009 to 2018, 1590 patients were identified who underwent SBRT for localized PCa. High-volume core involvement was a relatively rare event observed in 19% of our cohort, which was observed more in patients with small prostates (p < 0.0001) and/or intermediate-risk disease (p = 0.005). Higher PSA nadir was observed in those patients with low-volume core involvement within the intermediate-risk cohort (p = 0.004), which was confirmed when core involvement was analyzed as a continuous variable weighted by Gleason score (p = 0.049). High-volume core involvement was not associated with biochemical progression (p = 0.234). CONCLUSIONS:With a median follow-up of over 4 years, biochemical progression was not associated with pretreatment high-volume core involvement for patients treated with 5-fraction SBRT alone. In the era of prostate SBRT and MRI-directed prostate biopsies, the use of high-volume core involvement as an independent predictor of unfavorable intermediate risk disease should be revisited.
PMID: 38439040
ISSN: 1748-717x
CID: 5664372

TARGET: A Randomized, Noninferiority Trial of a Pretest, Patient-Driven Genetic Education Webtool Versus Genetic Counseling for Prostate Cancer Germline Testing

Loeb, Stacy; Keith, Scott W; Cheng, Heather H; Leader, Amy E; Gross, Laura; Sanchez Nolasco, Tatiana; Byrne, Nataliya; Hartman, Rebecca; Brown, Lauren H; Pieczonka, Christopher Michael; Gomella, Leonard G; Kelly, William Kevin; Lallas, Costas D; Handley, Nathan; Mille, Patrick Johnston; Mark, James Ryan; Brown, Gordon Andrew; Chopra, Sameer; McClellan, Alexandra; Wise, David R; Hollifield, Lucas; Giri, Veda N
PURPOSE/OBJECTIVE:Germline genetic testing (GT) is important for prostate cancer (PCA) management, clinical trial eligibility, and hereditary cancer risk. However, GT is underutilized and there is a shortage of genetic counselors. To address these gaps, a patient-driven, pretest genetic education webtool was designed and studied compared with traditional genetic counseling (GC) to inform strategies for expanding access to genetic services. METHODS:Technology-enhanced acceleration of germline evaluation for therapy (TARGET) was a multicenter, noninferiority, randomized trial ( identifier: NCT04447703) comparing a nine-module patient-driven genetic education webtool versus pretest GC. Participants completed surveys measuring decisional conflict, satisfaction, and attitudes toward GT at baseline, after pretest education/counseling, and after GT result disclosure. The primary end point was noninferiority in reducing decisional conflict between webtool and GC using the validated Decisional Conflict Scale. Mixed-effects regression modeling was used to compare decisional conflict between groups. Participants opting for GT received a 51-gene panel, with results delivered to participants and their providers. RESULTS:= .01), suggesting the patient-driven webtool was noninferior to GC. Overall, 145 (89.5%) GC and 120 (78.4%) in the webtool arm underwent GT, with pathogenic variants in 15.8% (8.7% in PCA genes). Satisfaction did not differ significantly between arms; knowledge of cancer genetics was higher but attitudes toward GT were less favorable in the webtool arm. CONCLUSION/CONCLUSIONS:The results of the TARGET study support the use of patient-driven digital webtools for expanding access to pretest genetic education for PCA GT. Further studies to optimize patient experience and evaluate them in diverse patient populations are warranted.
PMID: 38452310
ISSN: 2473-4284
CID: 5645652

A Phase 1/2 multicenter trial of DKN-01 as monotherapy or in combination with docetaxel for the treatment of metastatic castration-resistant prostate cancer (mCRPC)

Wise, David R; Pachynski, Russell K; Denmeade, Samuel R; Aggarwal, Rahul R; Deng, Jiehui; Febles, Victor Adorno; Balar, Arjun V; Economides, Minas P; Loomis, Cynthia; Selvaraj, Shanmugapriya; Haas, Michael; Kagey, Michael H; Newman, Walter; Baum, Jason; Troxel, Andrea B; Griglun, Sarah; Leis, Dayna; Yang, Nina; Aranchiy, Viktoriya; Machado, Sabrina; Waalkes, Erika; Gargano, Gabrielle; Soamchand, Nadia; Puranik, Amrutesh; Chattopadhyay, Pratip; Fedal, Ezeddin; Deng, Fang-Ming; Ren, Qinghu; Chiriboga, Luis; Melamed, Jonathan; Sirard, Cynthia A; Wong, Kwok-Kin
BACKGROUND:Dickkopf-related protein 1 (DKK1) is a Wingless-related integrate site (Wnt) signaling modulator that is upregulated in prostate cancers (PCa) with low androgen receptor expression. DKN-01, an IgG4 that neutralizes DKK1, delays PCa growth in pre-clinical DKK1-expressing models. These data provided the rationale for a clinical trial testing DKN-01 in patients with metastatic castration-resistant PCa (mCRPC). METHODS:(combination) for men with mCRPC who progressed on ≥1 AR signaling inhibitors. DKK1 status was determined by RNA in-situ expression. The primary endpoint of the phase 1 dose escalation cohorts was the determination of the recommended phase 2 dose (RP2D). The primary endpoint of the phase 2 expansion cohorts was objective response rate by iRECIST criteria in patients treated with the combination. RESULTS:18 pts were enrolled into the study-10 patients in the monotherapy cohorts and 8 patients in the combination cohorts. No DLTs were observed and DKN-01 600 mg was determined as the RP2D. A best overall response of stable disease occurred in two out of seven (29%) evaluable patients in the monotherapy cohort. In the combination cohort, five out of seven (71%) evaluable patients had a partial response (PR). A median rPFS of 5.7 months was observed in the combination cohort. In the combination cohort, the median tumoral DKK1 expression H-score was 0.75 and the rPFS observed was similar between patients with DKK1 H-score ≥1 versus H-score = 0. CONCLUSION/CONCLUSIONS:DKN-01 600 mg was well tolerated. DKK1 blockade has modest anti-tumor activity as a monotherapy for mCRPC. Anti-tumor activity was observed in the combination cohorts, but the response duration was limited. DKK1 expression in the majority of mCRPC is low and did not clearly correlate with anti-tumor activity of DKN-01 plus docetaxel.
PMID: 38341461
ISSN: 1476-5608
CID: 5635542

Case Series of Men with the Germline APC I1307K variant and Treatment-Emergent Neuroendocrine Prostate Cancer

Economides, Minas P; Nakazawa, Mari; Lee, Jonathan W; Li, Xiaochun; Hollifield, Lucas; Chambers, Rachelle; Sarfaty, Michal; Goldberg, Judith D; Antonarakis, Emmanuel S; Wise, David R
INTRODUCTION/BACKGROUND:Somatic mutations in the Wnt signaling gene Adenomatous Polyposis Coli (APC) promote metastatic prostate cancer (PCa) progression. Less is known regarding the impact of germline APC mutations on PCa outcomes. We sought to investigate the prevalence of aggressive variant PCa (AVPC) and treatment-emergent neuroendocrine PCa (t-NEPC) in patients with the germline APC I1307K variant, an alteration found in 7% of Ashkenazi Jewish men. MATERIALS AND METHODS/METHODS:We report a retrospective cohort study comparing patients with PCa and either APC I1307K germline mutation, APC somatic mutations, or unselected patients. Proportions of patients with AVPC among all the cases were estimated along with 95% Clopper-Pearson exact confidence intervals (CI). Odds ratios with 95% CI were provided for the prevalence of t-NEPC and AVPC in patients with germline APC I1307K compared to patients with frameshift alterations in APC. RESULTS:From 2016-2022, 18 patients with PCa at 3 institutions with the germline APC (I1307K) mutation were identified. Clinically-defined AVPC was found in 8 of the 15 cases with metastatic disease (53%; 95% CI: 26%-79%). Combined somatic alterations in two or more of RB1, TP53 or PTEN (molecularly-defined AVPC) were found in 5/18 cases (28%; 95% CI: 10%-54%). When compared to 20 patients with APC somatic frameshift mutations, patients with the germline APC I1307K variant had a significantly increased risk of AVPC (OR 7.2; 95% CI 1.27, 40.68). CONCLUSION/CONCLUSIONS:PCa that develops in the presence of the germline APC I1307K mutation appear to be enriched for clinically-defined and molecularly-defined AVPC and in particular, for t-NEPC.
PMID: 37482523
ISSN: 1938-0682
CID: 5618802

A Multivalent Peptoid Conjugate Modulates Androgen Receptor Transcriptional Activity to Inhibit Therapy-resistant Prostate Cancer

Habault, Justine; Schneider, Jeffrey A; Ha, Susan; Ruoff, Rachel; Pereira, Luiza D; Puccini, Joseph; Ranieri, Michela; Ayasun, Ruveyda; Deng, Jiehui; Kasper, Amanda C; Bar-Sagi, Dafna; Wong, Kwok-Kin; Zoubeidi, Amina; Claessens, Frank; Wise, David R; Logan, Susan K; Kirshenbaum, Kent; Garabedian, Michael J
Prostate cancers adapt to androgen receptor (AR) pathway inhibitors and progress to castration resistance due to ongoing AR expression and function. To counter this, we developed a new approach to modulate the AR and inhibit castration-resistant prostate cancer (CRPC) using multivalent peptoid conjugates (MPC) that contain multiple copies of the AR-targeting ligand ethisterone attached to a peptidomimetic scaffold. Here, we investigated the antitumor effects of compound MPC309, a trivalent display of ethisterone conjugated to a peptoid oligomer backbone that binds to the AR with nanomolar affinity. MPC309 exhibited potent antiproliferative effects on various enzalutamide-resistant prostate cancer models, including those with AR splice variants, ligand-binding mutations, and noncanonical AR gene expression programs, as well as mouse prostate organoids harboring defined genetic alterations that mimic lethal human prostate cancer subtypes. MPC309 is taken up by cells through macropinocytosis, an endocytic process more prevalent in cancer cells than in normal ones, thus providing an opportunity to target tumors selectively. MPC309 triggers a distinct AR transcriptome compared with DHT and enzalutamide, a clinically used antiandrogen. Specifically, MPC309 enhances the expression of differentiation genes while reducing the expression of genes needed for cell division and metabolism. Mechanistically, MPC309 increases AR chromatin occupancy and alters AR interactions with coregulatory proteins in a pattern distinct from DHT. In xenograft studies, MPC309 produced significantly greater tumor suppression than enzalutamide. Altogether, MPC309 represents a promising new AR modulator that can combat resistant disease by promoting an AR antiproliferative gene expression program.
PMID: 37486978
ISSN: 1538-8514
CID: 5634892

Single-cell analysis of localized prostate cancer patients links high Gleason score with an immunosuppressive profile

Adorno Febles, Victor R; Hao, Yuan; Ahsan, Aarif; Wu, Jiansheng; Qian, Yingzhi; Zhong, Hua; Loeb, Stacy; Makarov, Danil V; Lepor, Herbert; Wysock, James; Taneja, Samir S; Huang, William C; Becker, Daniel J; Balar, Arjun V; Melamed, Jonathan; Deng, Fang-Ming; Ren, Qinghu; Kufe, Donald; Wong, Kwok-Kin; Adeegbe, Dennis O; Deng, Jiehui; Wise, David R
BACKGROUND:Evading immune surveillance is a hallmark for the development of multiple cancer types. Whether immune evasion contributes to the pathogenesis of high-grade prostate cancer (HGPCa) remains an area of active inquiry. METHODS:Through single-cell RNA sequencing and multicolor flow cytometry of freshly isolated prostatectomy specimens and matched peripheral blood, we aimed to characterize the tumor immune microenvironment (TME) of localized prostate cancer (PCa), including HGPCa and low-grade prostate cancer (LGPCa). RESULTS: TILs. The PCa TME was infiltrated by macrophages but these did not clearly cluster by M1 and M2 markers. CONCLUSIONS:T cell exhaustion in localized PCa, a finding enriched in HGPCa relative to LGPCa. These studies suggest a possible link between the clinical-pathologic risk of PCa and the associated TME. Our results have implications for our understanding of the immunologic mechanisms of PCa pathogenesis and the implementation of immunotherapy for localized PCa.
PMID: 36988342
ISSN: 1097-0045
CID: 5463282

Avelumab Plus Talazoparib in Patients With Advanced Solid Tumors: The JAVELIN PARP Medley Nonrandomized Controlled Trial [Comment]

Yap, Timothy A; Bardia, Aditya; Dvorkin, Michael; Galsky, Matthew D; Beck, J Thaddeus; Wise, David R; Karyakin, Oleg; Rubovszky, Gábor; Kislov, Nikolay; Rohrberg, Kristoffer; Joy, Anil Abraham; Telli, Melinda L; Schram, Alison M; Conte, Umberto; Chappey, Colombe; Stewart, Ross; Stypinski, Daria; Michelon, Elisabete; Cesari, Rossano; Konstantinopoulos, Panagiotis A
IMPORTANCE/UNASSIGNED:Preclinical data suggest that poly(ADP-ribose) polymerase (PARP) inhibitors have synergistic activity when combined with immune checkpoint inhibitors (ICIs); however, it is unknown which tumor types or molecular subtypes may benefit from this combination. OBJECTIVE/UNASSIGNED:To investigate responses associated with the combination of avelumab and talazoparib in different tumor types and/or molecular subtypes. DESIGN, SETTING, AND PARTICIPANTS/UNASSIGNED:In this phase 1b and 2 basket nonrandomized controlled trial, patients with advanced solid tumors were enrolled in the following cohorts: non-small cell lung cancer (NSCLC); DNA damage response (DDR)-positive NSCLC; triple-negative breast cancer (TNBC); hormone receptor-positive, human epidermal growth factor receptor 2 (ERBB2)-negative, DDR-positive breast cancer; recurrent, platinum-sensitive ovarian cancer (OC); recurrent, platinum-sensitive, BRCA1/2-altered OC; urothelial cancer; metastatic castration-resistant prostate cancer (mCRPC); DDR-positive mCRPC; and BRCA1/2- or ATM-altered solid tumors. Data were analyzed between June 17, 2021, and August 6, 2021. INTERVENTIONS/UNASSIGNED:All patients in phases 1b and 2 received avelumab plus talazoparib. MAIN OUTCOMES AND MEASURES/UNASSIGNED:The phase 1b primary end point was dose-limiting toxic effects. The phase 2 primary end point was objective response, measured as objective response rate (ORR). Secondary end points included safety, time to response, duration of response (DOR), progression-free survival, time to prostate-specific antigen progression and PSA response of 50% or greater (for mCRPC), cancer antigen 125 response (for OC), pharmacokinetics, immunogenicity, and biomarkers. RESULTS/UNASSIGNED:A total of 223 patients (mean [SD] age, 63.2 [11.0] years; 117 [52.5%] men) were treated, including 12 patients in phase 1b and 211 patients in phase 2. The recommended phase 2 dose was avelumab 800 mg every 2 weeks plus talazoparib 1 mg once daily. In phase 2, the ORR was 18.2% (95% CI, 5.2%-40.3%) in patients with TNBC; 34.8% (95% CI, 16.4%-57.3%) in patients with HR-positive, ERBB2-negative, and DDR-positive BC; and 63.6% (95% CI, 30.8%-89.1%) in patients with platinum-sensitive, BRCA1/2-altered OC. Responses occurred more frequently in patients with BRCA1/2-altered tumors. Durable responses were observed in patients with TNBC (median [range] DOR, 11.1 [3.4-20.4] months); HR-positive, ERBB2-negative, and DDR-positive BC (median [range] DOR, 15.7 [3.9 to ≥20.6] months); and BRCA1/2-altered OC (median DOR not reached; range, 5.6 to ≥18.4 months). The most common grade 3 or greater treatment-related adverse events were anemia (75 patients [33.6%]), thrombocytopenia (48 patients [21.5%]), and neutropenia (31 patients [13.9%]). CONCLUSIONS AND RELEVANCE/UNASSIGNED:This nonrandomized controlled trial found that ORRs for avelumab plus talazoparib were comparable with those with PARP inhibitor or ICI monotherapy. Prolonged DOR in patients with TNBC; HR-positive, ERBB2-negative, and DDR-positive BC; and BRCA1/2-altered OC warrant further investigation in randomized clinical trials. These data highlight the importance of prospective patient selection in future studies of ICI and PARP-inhibitor combinations. TRIAL REGISTRATION/ Identifier: NCT03330405.
PMID: 36394849
ISSN: 2374-2445
CID: 5426152