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1.
Curr Genomics ; 22(4): 244-266, 2021 Dec 16.
Artigo em Inglês | MEDLINE | ID: mdl-35273457

RESUMO

Background: In recent years, the availability of high throughput technologies, establishment of large molecular patient data repositories, and advancement in computing power and storage have allowed elucidation of complex mechanisms implicated in therapeutic response in cancer patients. The breadth and depth of such data, alongside experimental noise and missing values, requires a sophisticated human-machine interaction that would allow effective learning from complex data and accurate forecasting of future outcomes, ideally embedded in the core of machine learning design. Objective: In this review, we will discuss machine learning techniques utilized for modeling of treatment response in cancer, including Random Forests, support vector machines, neural networks, and linear and logistic regression. We will overview their mathematical foundations and discuss their limitations and alternative approaches in light of their application to therapeutic response modeling in cancer. Conclusion: We hypothesize that the increase in the number of patient profiles and potential temporal monitoring of patient data will define even more complex techniques, such as deep learning and causal analysis, as central players in therapeutic response modeling.

2.
Org Biomol Chem ; 12(19): 3037-44, 2014 May 21.
Artigo em Inglês | MEDLINE | ID: mdl-24671378

RESUMO

A new pyrene based fluorescence probe has been synthesized for fluorogenic detection of Cu(2+) in acetonitrile-aqueous media (7 : 3 CH3CN-HEPES buffer, v/v, at pH 7.5) with bioimaging in both prokaryotic (Candida albicans cells) and eukaryotic (Tecoma stans pollen cells) living cells. The anion recognition properties of the sensor have also been studied in acetonitrile by fluorescence methods which show remarkable sensitivity toward fluoride over other anions examined.


Assuntos
Bignoniaceae/citologia , Candida/citologia , Cobre/análise , Corantes Fluorescentes/química , Fluoretos/análise , Pirenos/química , Ânions , Sobrevivência Celular , Corantes Fluorescentes/síntese química , Espectroscopia de Prótons por Ressonância Magnética , Espectrometria de Fluorescência , Espectrofotometria Ultravioleta
3.
Nat Commun ; 15(1): 352, 2024 Jan 08.
Artigo em Inglês | MEDLINE | ID: mdl-38191557

RESUMO

Heterogeneous response to Enzalutamide, a second-generation androgen receptor signaling inhibitor, is a central problem in castration-resistant prostate cancer (CRPC) management. Genome-wide systems investigation of mechanisms that govern Enzalutamide resistance promise to elucidate markers of heterogeneous treatment response and salvage therapies for CRPC patients. Focusing on the de novo role of MYC as a marker of Enzalutamide resistance, here we reconstruct a CRPC-specific mechanism-centric regulatory network, connecting molecular pathways with their upstream transcriptional regulatory programs. Mining this network with signatures of Enzalutamide response identifies NME2 as an upstream regulatory partner of MYC in CRPC and demonstrates that NME2-MYC increased activities can predict patients at risk of resistance to Enzalutamide, independent of co-variates. Furthermore, our experimental investigations demonstrate that targeting MYC and its partner NME2 is beneficial in Enzalutamide-resistant conditions and could provide an effective strategy for patients at risk of Enzalutamide resistance and/or for patients who failed Enzalutamide treatment.


Assuntos
Resistencia a Medicamentos Antineoplásicos , Neoplasias de Próstata Resistentes à Castração , Humanos , Masculino , Antagonistas de Receptores de Andrógenos , Benzamidas , Nucleosídeo NM23 Difosfato Quinases , Neoplasias de Próstata Resistentes à Castração/tratamento farmacológico , Neoplasias de Próstata Resistentes à Castração/genética , Transdução de Sinais
4.
Front Oncol ; 13: 1222168, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37746266

RESUMO

Introduction: Chronological aging is a well-recognized diagnostic and prognostic factor in multiple cancer types, yet the role of biological aging in manifesting cancer progression has not been fully explored yet. Methods: Given the central role of chronological aging in prostate cancer and AML incidence, here we investigate a tissue-specific role of biological aging in prostate cancer and AML progression. We have employed Cox proportional hazards modeling to associate biological aging genes with cancer progression for patients from specific chronological aging groups and for patients with differences in initial cancer aggressiveness. Results: Our prostate cancer-specific investigations nominated four biological aging genes (CD44, GADD45B, STAT3, GFAP) significantly associated with time to disease progression in prostate cancer in Taylor et al. patient cohort. Stratified survival analysis on Taylor dataset and validation on an independent TCGA and DKFZ PRAD patient cohorts demonstrated ability of these genes to predict prostate cancer progression, especially for patients with higher Gleason score and for patients younger than 60 years of age. We have further tested the generalizability of our approach and applied it to acute myeloid leukemia (AML). Our analysis nominated three AML-specific biological aging genes (CDC42EP2, CDC42, ALOX15B) significantly associated with time to AML overall survival, especially for patients with favorable cytogenetic risk score and for patients older than 56 years of age. Discussion: Comparison of the identified PC and AML markers to genes selected at random and to known markers of progression demonstrated robustness of our results and nominated the identified biological aging genes as valuable markers of prostate cancer and AML progression, opening new avenues for personalized therapeutic management and potential novel treatment investigations.

5.
Prostate Int ; 10(2): 75-79, 2022 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-35510081

RESUMO

Purpose: Approximately 7% of patients with newly diagnosed prostate cancer (PCa) in the US will have have metastatic disease. The dogma that there is no role for surgery in this population has been questioned recently. Here we report long-term outcomes of a phase 1 clinical trial on cytoreductive radical prostatectomy. Materials and methods: This is a multicenter phase 1 trial. The major inclusion criterion was biopsy proven N1M0 or NxM1a/b PCa. Primary end point was the Clavien-Dindo-based major complication rate. Secondary outcomes were biochemical progression and overall survival. RNA-seq correlative study was conducted in nine select cases as a pilot study. Results: Final accrual was 32 patients of which 25 and 7 were cNxM1 and cN1M0, respectively. With the median follow-up of 46 months (interquartile range 31.7 - 52.7 months), 25 out of the 32 patients (75%) were alive at the time of last contact. There were three disparate groups based on the oncologic outcome: favorable, intermediate, and poor. In seven men with favorable response, androgen deprivation therapy was switched to intermittent approach and five remain free of any evidence of disease after more than two years off all systemic therapy with the normalization of serum testosterone. Of these five patients, three had M1 disease. Long-term use of one pad or less per day was 80%. RNA-seq analysis revealed an enriched downregulation of tumor necrosis factor (TNF)-α signature in the favorable group. Conclusion: Overall long-term oncologic outcome of cytoreductive radical prostatectomy was significantly higher than historical results. Importantly, the combination of surgery with systemic therapy may result in a long durable response in a minority of men who present with metastatic PCa.

6.
Cancer Discov ; 11(9): 2316-2333, 2021 09.
Artigo em Inglês | MEDLINE | ID: mdl-33893149

RESUMO

Mitochondria provide the first line of defense against the tumor-promoting effects of oxidative stress. Here we show that the prostate-specific homeoprotein NKX3.1 suppresses prostate cancer initiation by protecting mitochondria from oxidative stress. Integrating analyses of genetically engineered mouse models, human prostate cancer cells, and human prostate cancer organotypic cultures, we find that, in response to oxidative stress, NKX3.1 is imported to mitochondria via the chaperone protein HSPA9, where it regulates transcription of mitochondrial-encoded electron transport chain (ETC) genes, thereby restoring oxidative phosphorylation and preventing cancer initiation. Germline polymorphisms of NKX3.1 associated with increased cancer risk fail to protect from oxidative stress or suppress tumorigenicity. Low expression levels of NKX3.1 combined with low expression of mitochondrial ETC genes are associated with adverse clinical outcome, whereas high levels of mitochondrial NKX3.1 protein are associated with favorable outcome. This work reveals an extranuclear role for NKX3.1 in suppression of prostate cancer by protecting mitochondrial function. SIGNIFICANCE: Our findings uncover a nonnuclear function for NKX3.1 that is a key mechanism for suppression of prostate cancer. Analyses of the expression levels and subcellular localization of NKX3.1 in patients at risk of cancer progression may improve risk assessment in a precision prevention paradigm, particularly for men undergoing active surveillance.See related commentary by Finch and Baena, p. 2132.This article is highlighted in the In This Issue feature, p. 2113.


Assuntos
Regulação Neoplásica da Expressão Gênica , Proteínas de Homeodomínio/genética , Mitocôndrias/metabolismo , Neoplasias da Próstata/genética , Fatores de Transcrição/genética , Linhagem Celular Tumoral , Humanos , Masculino
7.
Nat Cancer ; 2(4): 444-456, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-33899001

RESUMO

Prostate cancers are considered to be immunologically 'cold' tumors given the very few patients who respond to checkpoint inhibitor (CPI) therapy. Recently, enrichment of interferon-stimulated genes (ISGs) predicted a favorable response to CPI across various disease sites. The enhancer of zeste homolog-2 (EZH2) is overexpressed in prostate cancer and known to negatively regulate ISGs. In the present study, we demonstrate that EZH2 inhibition in prostate cancer models activates a double-stranded RNA-STING-ISG stress response upregulating genes involved in antigen presentation, Th1 chemokine signaling and interferon response, including programmed cell death protein 1 (PD-L1) that is dependent on STING activation. EZH2 inhibition substantially increased intratumoral trafficking of activated CD8+ T cells and increased M1 tumor-associated macrophages, overall reversing resistance to PD-1 CPI. Our study identifies EZH2 as a potent inhibitor of antitumor immunity and responsiveness to CPI. These data suggest EZH2 inhibition as a therapeutic direction to enhance prostate cancer response to PD-1 CPI.


Assuntos
Receptor de Morte Celular Programada 1 , Neoplasias da Próstata , Linfócitos T CD8-Positivos , Proteína Potenciadora do Homólogo 2 de Zeste/genética , Humanos , Interferons/farmacologia , Masculino , Neoplasias da Próstata/tratamento farmacológico , RNA de Cadeia Dupla
8.
Nat Cancer ; 1(11): 1082-1096, 2020 11.
Artigo em Inglês | MEDLINE | ID: mdl-34085047

RESUMO

Understanding the intricacies of lethal prostate cancer poses specific challenges due to difficulties in accurate modeling of metastasis in vivo. Here we show that NPK EYFP mice (for Nkx3.1 CreERT2/+ ; Pten flox/flox ; Kras LSL-G12D/+ ; R26R-CAG-LSL-EYFP/+) develop prostate cancer with a high penetrance of metastasis to bone, thereby enabling detection and tracking of bone metastasis in vivo and ex vivo. Transcriptomic and whole-exome analyses of bone metastasis from these mice revealed distinct molecular profiles conserved between human and mouse and specific patterns of subclonal branching from the primary tumor. Integrating bulk and single-cell transcriptomic data from mouse and human datasets with functional studies in vivo unravels a unique MYC/RAS co-activation signature associated with prostate cancer metastasis. Finally, we identify a gene signature with prognostic value for time to metastasis and predictive of treatment response in human patients undergoing androgen receptor therapy across clinical cohorts, thus uncovering conserved mechanisms of metastasis with potential translational significance.


Assuntos
Neoplasias Ósseas , Neoplasias da Próstata , Animais , Neoplasias Ósseas/genética , Castração , Regulação Neoplásica da Expressão Gênica , Humanos , Masculino , Camundongos , Neoplasias da Próstata/genética , Fatores de Transcrição/genética
9.
Commun Biol ; 2: 334, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31508508

RESUMO

Despite recent advances in discovering a wide array of novel chemotherapy agents, identification of patients with poor and favorable chemotherapy response prior to treatment administration remains a major challenge in clinical oncology. To tackle this challenge, we present a generalizable genome-wide computational framework pathCHEMO that uncovers interplay between transcriptomic and epigenomic mechanisms altered in biological pathways that govern chemotherapy response in cancer patients. Our approach is tested on patients with lung adenocarcinoma who received adjuvant standard-of-care doublet chemotherapy (i.e., carboplatin-paclitaxel), identifying seven molecular pathway markers of primary treatment response and demonstrating their ability to predict patients at risk of carboplatin-paclitaxel resistance in an independent patient cohort (log-rank p-value = 0.008, HR = 10). Furthermore, we extend our method to additional chemotherapy-regimens and cancer types to demonstrate its accuracy and generalizability. We propose that our model can be utilized to prioritize patients for specific chemotherapy-regimens as a part of treatment planning.


Assuntos
Biologia Computacional , Resistencia a Medicamentos Antineoplásicos , Transdução de Sinais , Software , Adenocarcinoma de Pulmão/tratamento farmacológico , Adenocarcinoma de Pulmão/etiologia , Adenocarcinoma de Pulmão/metabolismo , Antineoplásicos/farmacologia , Biologia Computacional/métodos , Perfilação da Expressão Gênica , Regulação Neoplásica da Expressão Gênica , Humanos , Modelos Biológicos , Curva ROC , Reprodutibilidade dos Testes
10.
EBioMedicine ; 31: 110-121, 2018 May.
Artigo em Inglês | MEDLINE | ID: mdl-29685789

RESUMO

Therapeutic resistance is a central problem in clinical oncology. We have developed a systematic genome-wide computational methodology to allow prioritization of patients with favorable and poor therapeutic response. Our method, which integrates DNA methylation and mRNA expression data, uncovered a panel of 5 differentially methylated sites, which explain expression changes in their site-harboring genes, and demonstrated their ability to predict primary resistance to androgen-deprivation therapy (ADT) in the TCGA prostate cancer patient cohort (hazard ratio = 4.37). Furthermore, this panel was able to accurately predict response to ADT across independent prostate cancer cohorts and demonstrated that it was not affected by Gleason, age, or therapy subtypes. We propose that this panel could be utilized to prioritize patients who would benefit from ADT and patients at risk of resistance that should be offered an alternative regimen. Such approach holds a long-term objective to build an adaptable accurate platform for precision therapeutics.


Assuntos
Androgênios , Metilação de DNA , DNA de Neoplasias , Epigenômica , Modelos Biológicos , Neoplasias da Próstata , DNA de Neoplasias/genética , DNA de Neoplasias/metabolismo , Estudo de Associação Genômica Ampla , Humanos , Masculino , Valor Preditivo dos Testes , Neoplasias da Próstata/genética , Neoplasias da Próstata/metabolismo , Neoplasias da Próstata/patologia , Neoplasias da Próstata/terapia , Fatores de Risco
11.
Dis Model Mech ; 11(11)2018 11 16.
Artigo em Inglês | MEDLINE | ID: mdl-30266798

RESUMO

Although it is known that inflammation plays a critical role in prostate tumorigenesis, the underlying processes are not well understood. Based on analysis of genetically engineered mouse models combined with correlative analysis of expression profiling data from human prostate tumors, we demonstrate a reciprocal relationship between inflammation and the status of the NKX3.1 homeobox gene associated with prostate cancer initiation. We find that cancer initiation in aged Nkx3.1 mutant mice correlates with enrichment of specific immune populations and increased expression of immunoregulatory genes. Furthermore, expression of these immunoregulatory genes is similarly increased in human prostate tumors having low levels of NKX3.1 expression. We further show that induction of prostatitis in Nkx3.1 mutant mice accelerates prostate cancer initiation, which is coincident with aberrant cellular plasticity and differentiation. Correspondingly, human prostate tumors having low levels of NKX3.1 have de-regulated expression of genes associated with these cellular processes. We propose that loss of function of NKX3.1 accelerates inflammation-driven prostate cancer initiation potentially via aberrant cellular plasticity and impairment of cellular differentiation.This article has an associated First Person interview with the first author of the paper.


Assuntos
Carcinogênese/patologia , Inflamação/patologia , Neoplasias da Próstata/patologia , Fatores de Transcrição/deficiência , Animais , Diferenciação Celular , Linhagem da Célula , Plasticidade Celular , Doença Crônica , Regulação da Expressão Gênica , Regulação Neoplásica da Expressão Gênica , Proteínas de Homeodomínio/genética , Proteínas de Homeodomínio/metabolismo , Humanos , Masculino , Camundongos Endogâmicos C57BL , Camundongos Mutantes , Fenótipo , Próstata/metabolismo , Próstata/patologia , Neoplasias da Próstata/genética , Prostatite/patologia , Fatores de Transcrição/genética , Fatores de Transcrição/metabolismo
12.
Eur Urol ; 72(4): 499-506, 2017 10.
Artigo em Inglês | MEDLINE | ID: mdl-28385453

RESUMO

BACKGROUND: Although men on active surveillance for prostate cancer (PCa) may benefit from intervention with 5α-reductase inhibitors (5-ARIs), it has not been resolved whether 5-ARIs are effective for delaying disease progression and, if so, whether specific patients are more likely to benefit. OBJECTIVE: To identify molecular features predictive of patient response to 5-ARIs. DESIGN, SETTING, AND PARTICIPANTS: Nkx3.1 mutant mice, a model of early-stage PCa, were treated with the 5-ARI finasteride, and histopathological and molecular analyses were performed. Cross-species computational analyses were used to compare expression profiles for treated mice with those of patients who had received 5-ARIs before prostatectomy. INTERVENTION: Finasteride administered to Nkx3.1 mutant mice. 5-ARI-treated patient specimens obtained retrospectively. OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS: Endpoints in mice included histopathology, immunohistochemistry, and molecular profiling. GraphPad Prism software, R-studio, and Matlab were used for statistical and data analyses. RESULTS AND LIMITATIONS: Finasteride treatment of Nkx3.1 mutant mice resulted in a significant reduction in prostatic intraepithelial neoplasia (PIN), as evident from histopathological and expression profiling analyses. Cross-species computational analysis comparing finasteride-treated mice with two independent 5-ARI-treated patient cohorts showed that reduced NKX3.1 expression is predictive of response to 5-ARI. A limitation of the study is that these retrospective human cohorts have relatively few patients with limited clinical outcome data. Future prospective clinical trials are needed to validate whether stratifying patients on the basis of NKX3.1 expression improves the benefit of 5-ARIs during active surveillance. CONCLUSIONS: This co-clinical study implicates NKX3.1 status as a predictor of response to 5-ARIs, and suggests that molecular features, including NKX3.1 expression, may help to identify PCa patients most likely to benefit from 5-ARIs during active surveillance. PATIENT SUMMARY: The aim of precision cancer prevention is to tailor interventions on the basis of individualized patient characteristics. We propose that patients with low NKX3.1 expression are optimal candidates for intervention with 5α-reductase inhibitors as an adjunct to active surveillance.


Assuntos
Inibidores de 5-alfa Redutase/uso terapêutico , Biomarcadores Tumorais/genética , Dutasterida/uso terapêutico , Finasterida/uso terapêutico , Proteínas de Homeodomínio/genética , Mutação , Neoplasia Prostática Intraepitelial/tratamento farmacológico , Neoplasias da Próstata/tratamento farmacológico , Fatores de Transcrição/genética , Inibidores de 5-alfa Redutase/efeitos adversos , Idoso , Animais , Biomarcadores Tumorais/metabolismo , Quimioterapia Adjuvante , Tomada de Decisão Clínica , Análise Mutacional de DNA , Dutasterida/efeitos adversos , Finasterida/efeitos adversos , Proteínas de Homeodomínio/metabolismo , Humanos , Masculino , Camundongos Knockout , Pessoa de Meia-Idade , Terapia Neoadjuvante , Estadiamento de Neoplasias , Seleção de Pacientes , Medicina de Precisão , Valor Preditivo dos Testes , Prostatectomia , Neoplasia Prostática Intraepitelial/enzimologia , Neoplasia Prostática Intraepitelial/genética , Neoplasia Prostática Intraepitelial/patologia , Neoplasias da Próstata/enzimologia , Neoplasias da Próstata/genética , Neoplasias da Próstata/patologia , Estudos Retrospectivos , Fatores de Tempo , Fatores de Transcrição/metabolismo , Resultado do Tratamento
13.
Org Lett ; 15(21): 5412-5, 2013 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-24138076

RESUMO

A probe based on 2-(2'-hydroxyphenyl) benzothiazole (HBT) has been synthesized and used for the ratiometric detection of hydrazine. The probe is designed in such a way that the excited state intramolecular proton transfer (ESIPT) of the HBT moiety gets blocked. The chemodosimetric approach of hydrazine to the probe results in the recovery of the ESIPT by removal of a free HBT moiety through subsequent substitution, cyclization, and elimination processes. The probe is successfully demonstrated to enable the detection of hydrazine in live cells.


Assuntos
Corantes Fluorescentes/química , Hidrazinas/química , Benzotiazóis/síntese química , Benzotiazóis/química , Ciclização , Imagem Molecular , Estrutura Molecular , Fenóis/síntese química , Fenóis/química , Prótons , Espectrometria de Fluorescência
14.
Chem Commun (Camb) ; 49(91): 10739-41, 2013 Nov 25.
Artigo em Inglês | MEDLINE | ID: mdl-24104701

RESUMO

A spirobenzopyran-quinoline (SBPQ) based sensor was synthesized which selectively detects trivalent ions viz. Al(3+), Fe(3+) and Cr(3+) through a fluorescence turn on signal in the red region (~675 nm) with the detection limit in the order of 10(-8) M. The potentiality of the probe was confirmed by employing it for fluorescence bio-imaging with Al(3+) in three different types of live-cells.


Assuntos
Alumínio/análise , Cátions/análise , Cromo/análise , Compostos Férricos/análise , Benzopiranos/química , Corantes Fluorescentes , Quinolinas/química , Espectrometria de Fluorescência , Espectrofotometria Ultravioleta , Compostos de Espiro/química
15.
Chem Commun (Camb) ; 49(65): 7231-3, 2013 Aug 21.
Artigo em Inglês | MEDLINE | ID: mdl-23841111

RESUMO

Naphthalene-salisaldehyde conjugate (NAPSAL) is established as a novel arsenate (H2AsO4(-)) selective 'turn-on' fluorescence probe. It can detect as low as 5 × 10(-9) M H2AsO4(-) in HEPES buffered EtOH : water (0.1 M, 1 : 9, v/v, pH 7.4). Trace level H2AsO4(-) in drinking water samples is measured using standard addition method. Intracellular arsenate in Candida albicans, grown in arsenic contaminated water of Purbasthali has successfully been detected under fluorescence microscope.


Assuntos
Arseniatos/análise , Candida albicans/química , Corantes Fluorescentes/química , Naftalenos/química , Água Doce/química , Microscopia de Fluorescência
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