Publications by authors named "Mariane Fontes"

Prostate and bladder cancers are the most common genitourinary cancers. In the past 2 decades, there has been increasing drug approval for these cancers, but there are patients who inherently do not respond or progress on such therapies highlighting the need for a better understanding of disease biology and mechanisms of resistance. Precision medicine has attempted to better select patients for specific therapies, although many advances have taken place in this field, access to targeted therapies and technology is distinct in different parts of the world.

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The treatment landscape of urothelial cancers has evolved in the last decade with the approval of chemotherapy, immune checkpoint inhibitors, targeted therapies, and antibody drug conjugates. Although improvements in response and survival have been achieved with these strategies, in some scenarios their benefit is still questionable. Current efforts to identify prognostic and predictive biomarkers are crucial for better patient selection and treatment outcomes.

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Background: With the ongoing expansion of life-prolonging therapies approved to treat advanced prostate cancer, there is currently an unmet need to better understand real-world treatment patterns and identify optimal treatment sequencing for men with metastatic castration-resistant prostate cancer (mCRPC).

Methods: In this retrospective, observational cohort analysis, patients with confirmed mCRPC were identified in the Auditron claims database and used to describe mCRPC treatment patterns and trends in the Brazilian private healthcare system from 2014 to 2019. Demographics and clinical characteristics, prostate cancer stage at diagnosis, and type and number of treatment lines were evaluated.

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Urothelial carcinoma is the second most frequent genitourinary malignancy. Despite the poor prognosis, new treatment options have emerged and have expanded the therapeutic landscape for the disease. Although major improvements have been achieved, many patients experience rapid disease progression and low responses in subsequent lines of therapy.

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Introduction: Germ-cell tumors (GCTs) are the most common malignancy in young men. There is a paucity of data on GCTs in developing countries. LACOG 0515 study aimed to evaluate clinical characteristics and treatment outcomes in patients with GCTs from Brazilian cancer centers.

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Article Synopsis
  • The study investigates the genomic differences between primary prostate cancer and metastatic castration-resistant prostate cancer (mCRPC), analyzing biopsies from patients who developed mCRPC.
  • Researchers examined 470 treatment-naive prostate cancer biopsies and 61 matched mCRPC biopsies, utilizing targeted and low-pass whole-genome sequencing to identify common mutations and copy number variations.
  • Key findings include higher than previously reported mutations in TP53, BRCA2, and CDK12, and the discovery that RB1 loss in primary tumors correlates with poorer patient prognosis, indicating significant genomic differences between early-stage and more advanced cancer.
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The presence of high expressing epithelial cell adhesion molecule (EpCAM) circulating tumor cells (CTC) enumerated by CellSearch in blood of cancer patients is strongly associated with poor prognosis. This raises the question about the presence and relation with clinical outcome of low EpCAM expressing CTC (EpCAM CTC). In the EU-FP7 CTC-Trap program, we investigated the presence of EpCAM and EpCAM CTC using CellSearch, followed by microfiltration of the EpCAM CTC depleted blood.

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Background: Understanding the integrated immunogenomic landscape of advanced prostate cancer (APC) could impact stratified treatment selection.

Methods: Defective mismatch repair (dMMR) status was determined by either loss of mismatch repair protein expression on IHC or microsatellite instability (MSI) by PCR in 127 APC biopsies from 124 patients (Royal Marsden [RMH] cohort); MSI by targeted panel next-generation sequencing (MSINGS) was then evaluated in the same cohort and in 254 APC samples from the Stand Up To Cancer/Prostate Cancer Foundation (SU2C/PCF). Whole exome sequencing (WES) data from this latter cohort were analyzed for pathogenic MMR gene variants, mutational load, and mutational signatures.

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Circulating tumor cells (CTCs) have clinical relevance, but their study has been limited by their low frequency. We evaluated liquid biopsies by apheresis to increase CTC yield from patients suffering from metastatic prostate cancer, allow precise gene copy-number calls, and study disease heterogeneity. Apheresis was well tolerated and allowed the separation of large numbers of CTCs; the average CTC yield from 7.

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Article Synopsis
  • The study investigates the role of Circulating Tumor Cells (CTCs) and tumor-derived Extracellular Vesicles (tdEVs) in predicting overall survival for patients with Castration-Resistant Prostate Cancer (CRPC).
  • It involved isolating and counting CTCs and tdEVs in 129 CRPC patients, using established biomarkers to differentiate between favorable and unfavorable prognoses based on overall survival data.
  • Results showed that both CTCs and tdEVs, along with other plasma markers, were higher in CRPC patients compared to healthy individuals, with tdEVs providing comparable prognostic information to CTC counts in assessing patient outcomes.
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Introduction: Cardiovascular surgery with cardiopulmonary bypass (CPB) has improved in past decades, but inflammatory activation in this setting is still unpredictable and is associated with several postoperative complications. Perioperative levels of macrophage migration inhibitory factor (MIF) and other inflammatory mediators could be implicated in adverse outcomes in cardiac surgery.

Methods: Serum levels of MIF, monocyte chemoattractant protein (MCP)-1, soluble CD40 ligand, IL-6 and IL-10 from 93 patients subjected to CPB were measured by enzyme-linked immunosorbent assay and compared with specific and global postoperative organ dysfunctions through multiple organ dysfunction score (MODS) and sequential organ failure assessment (SOFA).

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