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1.
Future Oncol ; 20(29): 2203-2212, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39440714

RESUMO

Aim: Characterize febrile neutropenia in the real-world and explore potentially modifiable risk factors.Patients & methods: Characteristics of patient presenting with febrile neutropenia after systemic cancer treatment were investigated, with a thorough evaluation of potential risk factors.Results: The rate of febrile neutropenia requiring hospitalization was comparable with clinical trials (mean absolute difference 2%, 95% CI: -1-4%; p = 0.29). The in-hospital mortality rate was 6%. Most cases resulted from low-risk regimens (50%) and 18.2% presented no apparent risk factors. 42.4% of patients presented modifiable factors potentially involved in the occurrence of febrile neutropenia.Conclusion: Febrile neutropenia rate in contemporary real-world evidence is comparable with clinical trials. Appropriate G-CSF administration and avoidance of potentially harmful drug-interactions represent potential areas for improvement.


[Box: see text].


Assuntos
Neutropenia Febril , Neoplasias , Humanos , Masculino , Feminino , Neutropenia Febril/etiologia , Neutropenia Febril/epidemiologia , Neutropenia Febril/induzido quimicamente , Pessoa de Meia-Idade , Fatores de Risco , Neoplasias/complicações , Neoplasias/tratamento farmacológico , Idoso , Fator Estimulador de Colônias de Granulócitos/uso terapêutico , Adulto , Hospitalização/estatística & dados numéricos , Mortalidade Hospitalar , Antineoplásicos/efeitos adversos , Antineoplásicos/uso terapêutico , Estudos Retrospectivos , Neutropenia Febril Induzida por Quimioterapia/epidemiologia , Neutropenia Febril Induzida por Quimioterapia/etiologia , Idoso de 80 Anos ou mais
2.
Int J Cancer ; 153(9): 1568-1578, 2023 11 01.
Artigo em Inglês | MEDLINE | ID: mdl-37306359

RESUMO

The spatial distribution of tumor-infiltrating lymphocytes (TIL) predicts breast cancer outcome and response to systemic therapy, highlighting the importance of an intact tissue structure for characterizing tumors. Here, we present ST-FFPE, a spatial transcriptomics method for the analysis of formalin-fixed paraffin-embedded samples, which opens the possibility of interrogating archival tissue. The method involves extraction, exome capture and sequencing of RNA from different tumor compartments microdissected by laser-capture, and can be used to study the cellular composition of tumor microenvironment. Focusing on triple-negative breast cancer (TNBC), we characterized T cells, B cells, dendritic cells, fibroblasts and endothelial cells in both stromal and intra-epithelial compartments. We found a highly variable spatial distribution of immune cell subsets among tumors. This analysis revealed that the immune repertoires of intra-epithelial T and B cells were consistently less diverse and more clonal than those of stromal T and B cells. T-cell receptor (TCR) sequencing confirmed a reduced diversity and higher clonality of intra-epithelial T cells relative to the corresponding stromal T cells. Analysis of the top 10 dominant clonotypes in the two compartments showed a majority of shared but also some unique clonotypes both in stromal and intra-epithelial T cells. Hyperexpanded clonotypes were more abundant among intra-epithelial than stromal T cells. These findings validate the ST-FFPE method and suggest an accumulation of antigen-specific T cells within tumor core. Because ST-FFPE is applicable for analysis of previously collected tissue samples, it could be useful for rapid assessment of intratumoral cellular heterogeneity in multiple disease and treatment settings.


Assuntos
Neoplasias da Mama , Humanos , Feminino , Neoplasias da Mama/genética , Células Endoteliais , Transcriptoma , Receptores de Antígenos de Linfócitos T , Perfilação da Expressão Gênica , Linfócitos do Interstício Tumoral , Microambiente Tumoral/genética
3.
Int J Mol Sci ; 24(5)2023 Feb 24.
Artigo em Inglês | MEDLINE | ID: mdl-36901951

RESUMO

The development of targeted therapies for non-BRAF p.Val600-mutant melanomas remains a challenge. Triple wildtype (TWT) melanomas that lack mutations in BRAF, NRAS, or NF1 form 10% of human melanomas and are heterogeneous in their genomic drivers. MAP2K1 mutations are enriched in BRAF-mutant melanoma and function as an innate or adaptive resistance mechanism to BRAF inhibition. Here we report the case of a patient with TWT melanoma with a bona fide MAP2K1 mutation without any BRAF mutations. We performed a structural analysis to validate that the MEK inhibitor trametinib could block this mutation. Although the patient initially responded to trametinib, he eventually progressed. The presence of a CDKN2A deletion prompted us to combine a CDK4/6 inhibitor, palbociclib, with trametinib but without clinical benefit. Genomic analysis at progression showed multiple novel copy number alterations. Our case illustrates the challenges of combining MEK1 and CDK4/6 inhibitors in case of resistance to MEK inhibitor monotherapy.


Assuntos
Melanoma , Neoplasias Cutâneas , Masculino , Humanos , Neoplasias Cutâneas/genética , Melanoma/genética , Piridonas/uso terapêutico , Pirimidinonas/uso terapêutico , Inibidores de Proteínas Quinases/farmacologia , Quinases de Proteína Quinase Ativadas por Mitógeno/genética , Proteínas Proto-Oncogênicas B-raf/genética , Mutação , MAP Quinase Quinase 1/genética
4.
Gut ; 71(12): 2502-2517, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-35477539

RESUMO

OBJECTIVE: Stroma-rich tumours represent a poor prognostic subtype in stage II/III colon cancer (CC), with high relapse rates and limited response to standard adjuvant chemotherapy. DESIGN: To address the lack of efficacious therapeutic options for patients with stroma-rich CC, we stratified our human tumour cohorts according to stromal content, enabling identification of the biology underpinning relapse and potential therapeutic vulnerabilities specifically within stroma-rich tumours that could be exploited clinically. Following human tumour-based discovery and independent clinical validation, we use a series of in vitro and stroma-rich in vivo models to test and validate the therapeutic potential of elevating the biology associated with reduced relapse in human tumours. RESULTS: By performing our analyses specifically within the stroma-rich/high-fibroblast (HiFi) subtype of CC, we identify and validate the clinical value of a HiFi-specific prognostic signature (HPS), which stratifies tumours based on STAT1-related signalling (High-HPS v Low-HPS=HR 0.093, CI 0.019 to 0.466). Using in silico, in vitro and in vivo models, we demonstrate that the HPS is associated with antigen processing and presentation within discrete immune lineages in stroma-rich CC, downstream of double-stranded RNA and viral response signalling. Treatment with the TLR3 agonist poly(I:C) elevated the HPS signalling and antigen processing phenotype across in vitro and in vivo models. In an in vivo model of stroma-rich CC, poly(I:C) treatment significantly increased systemic cytotoxic T cell activity (p<0.05) and reduced liver metastases (p<0.0002). CONCLUSION: This study reveals new biological insight that offers a novel therapeutic option to reduce relapse rates in patients with the worst prognosis CC.


Assuntos
Biomarcadores Tumorais , Neoplasias do Colo , Humanos , Biomarcadores Tumorais/genética , Células Estromais/patologia , Recidiva Local de Neoplasia/prevenção & controle , Recidiva Local de Neoplasia/patologia , Neoplasias do Colo/patologia , Prognóstico
5.
BMC Med Ethics ; 22(1): 62, 2021 05 18.
Artigo em Inglês | MEDLINE | ID: mdl-34006284

RESUMO

BACKGROUND: In this article, we address questions regarding how people consider what they do or do not consent to and the reasons why. This article presents the findings of a citizen forum study conducted by the University of Geneva in partnership with the Geneva University Hospitals to explore the opinions and concerns of members of the public regarding predictive oncology, genetic sequencing, and cancer. METHODS: This paper presents the results of a citizen forum that included 73 participants. A research tool titled "the mechanics of consent" was designed for this study. This tool is a table encouraging participants to reflect on social and research actors, types of data, and desired levels of control while sharing different types of data with different actors. Participants' discussion that led to the completion of each table were audio-recorded, transcribed, and analyzed using thematic analysis. RESULTS: The results are a compilation of responses from the mechanics of consent tool divided into two sections; the first presents quantitative results of collective responses regarding attitudes to consent to donate their data. The second section present qualitative findings emerged from the discussion amongst participants. DISCUSSION: Choice and control of personal data is crucial for the public to be able to decide who and how to trust. Key information to be disclosed to potential research participants shall include information about potential risks and benefits; who will be accessing and using their data; as well as assurances that their choice will be respected. Furthermore, researchers ought to make sure they are trustworthy, by acting in a competent, reliable, and honest manner. Governance systems ought to be better equipped to address ethical issues raise by the growing presence of non-traditional research actors, consent of exchanges of data via digital devices and online activity such as social media and fairness of data trading. Finally, informed consent is one of the various elements that contribute to conducting ethical research. More needs to be done to strengthen governance and ensure adequate protection of research participants, particularly to address issues related to predictive health analytics.


Assuntos
Consentimento Livre e Esclarecido , Justiça Social , Atitude , Humanos , Reprodutibilidade dos Testes , Confiança
7.
J Pathol ; 246(4): 459-469, 2018 12.
Artigo em Inglês | MEDLINE | ID: mdl-30229909

RESUMO

Mucinous ovarian tumors (MOTs) morphologically and epidemiologically resemble mucinous cystic neoplasms (MCNs) of the pancreas, sharing a similar stroma and both occurring disproportionately among young females. Additionally, MOTs and MCNs share similar clinical characteristics and immunohistochemical phenotypes. Exome sequencing has revealed frequent recurrent mutations in KRAS and RNF43 in both MOTs and MCNs. The cell of origin for these tumors remains unclear, but MOTs sometimes arise in the context of mature cystic teratomas and other primordial germ cell (PGC) tumors. We undertook the present study to investigate whether non-teratoma-associated MOTs and MCNs share a common cell of origin. Comparisons of the gene expression profiles of MOTs [including both the mucinous borderline ovarian tumors (MBOTs) and invasive mucinous ovarian carcinomas (MOCs)], high-grade serous ovarian carcinomas, ovarian surface epithelium, Fallopian tube epithelium, normal pancreatic tissue, pancreatic duct adenocarcinomas, MCNs, and single-cell RNA-sequencing of PGCs revealed that both MOTs and MCNs are more closely related to PGCs than to either eutopic epithelial tumors or normal epithelia. We hypothesize that MCNs may arise from PGCs that stopped in the dorsal pancreas during their descent to the gonads during early human embryogenesis, while MOTs arise from PGCs in the ovary. Together, these data suggest a common pathway for the development of MCNs and MOTs, and suggest that these tumors may be more properly classified as germ cell tumor variants. Copyright © 2018 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.


Assuntos
Linhagem da Célula , Células Germinativas/patologia , Neoplasias Císticas, Mucinosas e Serosas/embriologia , Neoplasias Embrionárias de Células Germinativas/embriologia , Células-Tronco Neoplásicas/patologia , Neoplasias Ovarianas/embriologia , Neoplasias Pancreáticas/embriologia , Adulto , Biologia Computacional/métodos , Mineração de Dados/métodos , Bases de Dados Genéticas , Feminino , Perfilação da Expressão Gênica/métodos , Regulação da Expressão Gênica no Desenvolvimento , Células Germinativas/metabolismo , Humanos , Masculino , Pessoa de Meia-Idade , Morfogênese , Neoplasias Císticas, Mucinosas e Serosas/classificação , Neoplasias Císticas, Mucinosas e Serosas/genética , Neoplasias Císticas, Mucinosas e Serosas/metabolismo , Neoplasias Embrionárias de Células Germinativas/classificação , Neoplasias Embrionárias de Células Germinativas/genética , Neoplasias Embrionárias de Células Germinativas/metabolismo , Células-Tronco Neoplásicas/metabolismo , Neoplasias Ovarianas/classificação , Neoplasias Ovarianas/genética , Neoplasias Ovarianas/metabolismo , Neoplasias Pancreáticas/classificação , Neoplasias Pancreáticas/genética , Neoplasias Pancreáticas/metabolismo , Fenótipo , Análise de Sequência de RNA/métodos , Análise de Célula Única/métodos
8.
J Transl Med ; 15(1): 199, 2017 10 02.
Artigo em Inglês | MEDLINE | ID: mdl-28969705

RESUMO

SLFN11 is a recently discovered protein with a putative DNA/RNA helicase function. First identified in association with the maturation of thymocytes, SLFN11 was later causally associated, by two independent groups, with the resistance to DNA damaging agents such as topoisomerase I and II inhibitors, platinum compounds, and other alkylators, making it an attractive molecule for biomarker development. Later, SLFN11 was linked to antiviral response in human cells and interferon production, establishing a potential bond between immunity and chemotherapy. Recently, we demonstrated the potential role of SLN11 as a biomarker to predict sensitivity to the carboplatin/taxol combination in ovarian cancer. The present manuscript reports on the first international monothematic workshop on SLFN11. Several researchers from around the world, directly and actively involved in the discovery, functional characterization, and study of SLFN11 for its biomarker and medicinal properties gathered to share their views on the current knowledge advances concerning SLFN11. The aim of the manuscript is to summarize the authors' interventions and the main take-home messages resulting from the workshop.


Assuntos
Biomarcadores Tumorais/metabolismo , Neoplasias/metabolismo , Proteínas Nucleares/metabolismo , Pontos de Checagem do Ciclo Celular/efeitos dos fármacos , Consenso , Dano ao DNA , Humanos , Mutagênicos/toxicidade , Neoplasias/tratamento farmacológico , Neoplasias/imunologia , Neoplasias/patologia , Fenótipo
9.
Rev Med Suisse ; 13(563): 1044-1048, 2017 May 17.
Artigo em Francês | MEDLINE | ID: mdl-28636296

RESUMO

Improvements in diagnosis and treatments explain the notable increase in patients chronically affected or recovering from cancer. This is a fragile population, who is physically, psychologically and socially affected by the consequences of the disease and the associated treatments. In addition to detecting a possible relapse, oncologists and primary care physicians have to deal with a variety of issues like psychological distress, sexual dysfunction, cardiotoxicity, cognitive impairment, fatigue and, in some cases, a second primary cancer. This is a real challenge for modern medical oncology, with an important financial impact. A long-term structured follow-up could improve the management of patients with a history of cancer and favour their physical recovery and psychosocial integration.


Les progrès accomplis dans le diagnostic et le traitement oncologique sont à l'origine d'une augmentation remarquable du nombre de patients guéris ou souffrant chroniquement d'un cancer. Il s'agit d'une population touchée sur le plan physique, psychologique et socio-économique par les effets de la maladie et du traitement reçu. Au-delà de la détection de la récidive, l'oncologue et le généraliste seront confrontés à la gestion de problématiques telles que la détresse psychologique, la cardiotoxicité, les troubles cognitifs, la fatigue ou l'apparition d'un deuxième cancer primaire. Il s'agit d'un véritable défi de l'oncologie moderne, dont l'impact économique sera majeur. Un suivi à long terme structuré pourrait améliorer la prise en charge de ces patients et favoriser leur récupération physique et leur intégration psychosociale.


Assuntos
Sobreviventes de Câncer , Continuidade da Assistência ao Paciente , Neoplasias/terapia , Fadiga/etiologia , Fadiga/psicologia , Seguimentos , Humanos , Oncologia/métodos , Oncologia/tendências , Recidiva Local de Neoplasia/patologia , Recidiva Local de Neoplasia/prevenção & controle , Neoplasias/complicações , Neoplasias/patologia , Neoplasias/psicologia , Recidiva , Fatores de Tempo
10.
Br J Cancer ; 114(12): 1387-94, 2016 06 14.
Artigo em Inglês | MEDLINE | ID: mdl-27219019

RESUMO

BACKGROUND: A better understanding of the molecular profile of anal squamous cell carcinomas (ASCCs) is necessary to consider new therapeutic approaches, and the identification of prognostic and predictive factors for response to treatment. METHODS: We retrospectively analysed tumours from ASCC patients for mutational analysis of KRAS, NRAS, HRAS, BRAF, PIK3CA, MET, TP53 and FBXW7 genes by HRM and Sanger sequencing analysis. RESULTS: Specimens from 148 patients were analysed: 96 treatment-naive tumours and 52 recurrences after initial radiotherapy (RT) or chemoradiotherapy (CRT). Mutations of KRAS, PIK3CA, FBXW7 and TP53 genes were present in 3 (2.0%), 30 (20.3%), 9 (6.1%) and 7 tumours (4.7%), respectively. The distribution of the mutations was similar between treatment-naive tumours and recurrences, except for TP53 mutations being more frequent in recurrences (P=0.0005). In patients treated with abdominoperineal resection (APR) after relapse (n=38, median follow-up of 18.2 years), overall survival (OS) was significantly correlated with HPV16 status (P=0.048), gender (P=0.045) and PIK3CA mutation (P=0.037). The PIK3CA status retained its prognostic significance in Cox multivariate regression analysis (P=0.025). CONCLUSIONS: Our study identified PIK3CA mutation as an independent prognostic factor in patients who underwent APR for ASCC recurrence, suggesting a potential benefit from adjuvant treatment and the evaluation of targeted therapies with PI3K/Akt/mTor inhibitors in PIK3CA-mutated patients.


Assuntos
Neoplasias do Ânus/genética , Neoplasias do Ânus/cirurgia , Mutação , Fosfatidilinositol 3-Quinases/genética , Terapia de Salvação/métodos , Adulto , Idoso , Idoso de 80 Anos ou mais , Neoplasias do Ânus/metabolismo , Neoplasias do Ânus/patologia , Classe I de Fosfatidilinositol 3-Quinases , Análise Mutacional de DNA , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/genética , Recidiva Local de Neoplasia/metabolismo , Recidiva Local de Neoplasia/patologia , Recidiva Local de Neoplasia/cirurgia , Fosfatidilinositol 3-Quinases/metabolismo , Estudos Retrospectivos
11.
Rev Med Suisse ; 12(519): 978-81, 2016 May 18.
Artigo em Francês | MEDLINE | ID: mdl-27424424

RESUMO

Bioinformatics is essential in clinical oncology and research. Combining biology, computer science and mathematics, bioinformatics aims to derive useful information from clinical and biological data, often poorly structured, at a large scale. Bioinformatics approaches have reclassified certain cancers based on their molecular and biological presentation, improving treatment selection. Many molecular signatures have been developed and, after validation, some are now usable in clinical practice. Other applications could facilitate daily practice, reduce the risk of error and increase the precision of medical decision-making. Bioinformatics must evolve in accordance with ethical considerations and requires multidisciplinary collaboration. Its application depends on a sound technical foundation that meets strict quality requirements.


Assuntos
Biologia Computacional/métodos , Informática Médica/métodos , Neoplasias/terapia , Tomada de Decisão Clínica , Biologia Computacional/ética , Comportamento Cooperativo , Humanos , Comunicação Interdisciplinar , Informática Médica/ética , Oncologia/métodos , Neoplasias/classificação , Neoplasias/patologia
12.
Cell Mol Life Sci ; 71(23): 4519-44, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25238782

RESUMO

Common fragile sites (CFSs) are regions of the genome with a predisposition to DNA double-strand breaks in response to intrinsic (oncogenic) or extrinsic replication stress. CFS breakage is a common feature in carcinogenesis from its earliest stages. Given that a number of oncogenes and tumor suppressors are located within CFSs, a question that emerges is whether fragility in these regions is only a structural "passive" incident or an event with a profound biological effect. Furthermore, there is sparse evidence that other elements, like non-coding RNAs, are positioned with them. By analyzing data from various libraries, like miRbase and ENCODE, we show a prevalence of various cancer-related genes, miRNAs, and regulatory binding sites, such as CTCF within CFSs. We propose that CFSs are not only susceptible structural domains, but highly organized "functional" entities that when targeted, severe repercussion for cell homeostasis occurs.


Assuntos
Sítios Frágeis do Cromossomo , Neoplasias/genética , Oncogenes , Animais , Reparo do DNA , Replicação do DNA , Humanos , MicroRNAs/genética
13.
Sci Transl Med ; 16(757): eadk1731, 2024 Jul 24.
Artigo em Inglês | MEDLINE | ID: mdl-39047119

RESUMO

Acute myeloid leukemia (AML) remains a challenging hematological malignancy with poor prognosis and limited treatment options. Leukemic stem cells (LSCs) contribute to therapeutic failure, relapse, and adverse outcome. This study investigates the role of quiescence and related molecular mechanisms in AML pathogenesis and LSC functions to identify potential therapeutic targets. Transcriptomic analysis revealed that the LSC-enriched quiescent cell population has a distinct gene signature with prognostic relevance in patients with AML. Mechanistically, quiescent blasts exhibit increased autophagic activity, which contributes to their sustained viability. Proteomic profiling uncovered differential requirements for iron metabolism between quiescent and cycling cells, revealing a unique dependence of quiescent cells on ferritinophagy, a selective form of autophagy mediated by nuclear receptor coactivator 4 (NCOA4), which regulates iron bioavailability. We evaluated the therapeutic potential of inhibiting NCOA4-mediated ferritinophagy using genetic knockdown and chemical inhibition approaches. In vitro assays showed that suppression of NCOA4 was toxic to leukemic blasts, particularly the CD34+CD38- LSC-enriched population, without affecting normal CD34+ hematopoietic progenitors. In vivo studies using murine patient-derived xenograft (PDX) models of AML confirmed that NCOA4 inhibition reduced tumor burden and impaired LSC viability and self-renewal, indicating a specific vulnerability of these cells to ferritinophagy disruption. Our findings underscore the role of NCOA4-mediated ferritinophagy in maintaining LSC quiescence and function and suggest that targeting this pathway may be an effective therapeutic strategy for AML. This study highlights the potential of NCOA4 inhibition to improve AML outcomes and paves the way for future research and clinical development.


Assuntos
Autofagia , Ferritinas , Leucemia Mieloide Aguda , Células-Tronco Neoplásicas , Coativadores de Receptor Nuclear , Leucemia Mieloide Aguda/patologia , Leucemia Mieloide Aguda/metabolismo , Células-Tronco Neoplásicas/metabolismo , Células-Tronco Neoplásicas/patologia , Humanos , Animais , Ferritinas/metabolismo , Coativadores de Receptor Nuclear/metabolismo , Camundongos , Linhagem Celular Tumoral , Ferro/metabolismo , Ensaios Antitumorais Modelo de Xenoenxerto
14.
Cancers (Basel) ; 16(8)2024 Apr 11.
Artigo em Inglês | MEDLINE | ID: mdl-38672547

RESUMO

BACKGROUND: Immune checkpoint inhibitors (ICIs) improve overall survival (OS) in advanced/metastatic urothelial cancer (a/mUC) patients. Preliminary evidence suggests a prognostic role of inflammatory biomarkers in this setting. We aimed to develop a disease-specific prognostic inflammatory index for a/mUC patients on ICIs. METHODS: Fifteen variables were retrospectively correlated with OS and progression-free survival (PFS) in a development (D, n = 264) and a validation (V, n = 132) cohort of platinum-pretreated a/mUC pts receiving ICIs at L2 or further line. A nomogram and inflammatory prognostic index (U-IPI) were developed. The index was also tested in a control cohort of patients treated with chemotherapy only (C, n = 114). RESULTS: The strongest predictors of OS were baseline platelet/lymphocyte (PLR) and neutrophil/lymphocyte (NLR) ratios, and lactate dehydrogenase (LDH), NLR, and albumin changes at 4 weeks. These were used to build the U-IPI, which can distinctly classify patients into good or poor response groups. The nomogram scoring is significant for PFS and OS (p < 0.001 in the D, V, and combined cohorts) for the immunotherapy (IO) cohort, but not for the control cohort. CONCLUSIONS: The lack of a baseline systemic inflammatory profile and the absence of early serum inflammatory biomarker changes are associated with significantly better outcomes on ICIs in a/mUC pts. The U-IPI is an easily applicable dynamic prognostic tool for PFS and OS, allowing for the early identification of a sub-group with dismal outcomes that would not benefit from ICIs, while distinguishing another that draws an important benefit.

15.
Nat Genet ; 56(3): 458-472, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38351382

RESUMO

Molecular stratification using gene-level transcriptional data has identified subtypes with distinctive genotypic and phenotypic traits, as exemplified by the consensus molecular subtypes (CMS) in colorectal cancer (CRC). Here, rather than gene-level data, we make use of gene ontology and biological activation state information for initial molecular class discovery. In doing so, we defined three pathway-derived subtypes (PDS) in CRC: PDS1 tumors, which are canonical/LGR5+ stem-rich, highly proliferative and display good prognosis; PDS2 tumors, which are regenerative/ANXA1+ stem-rich, with elevated stromal and immune tumor microenvironmental lineages; and PDS3 tumors, which represent a previously overlooked slow-cycling subset of tumors within CMS2 with reduced stem populations and increased differentiated lineages, particularly enterocytes and enteroendocrine cells, yet display the worst prognosis in locally advanced disease. These PDS3 phenotypic traits are evident across numerous bulk and single-cell datasets, and demark a series of subtle biological states that are currently under-represented in pre-clinical models and are not identified using existing subtyping classifiers.


Assuntos
Neoplasias Colorretais , Humanos , Neoplasias Colorretais/patologia , Prognóstico , Diferenciação Celular/genética , Fenótipo , Biomarcadores Tumorais/genética , Perfilação da Expressão Gênica
16.
Praxis (Bern 1994) ; 112(3): 149-155, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36855887

RESUMO

Immunotherapy is becoming increasingly important in the management of urological, gynecological, and gastrointestinal cancers. Immune checkpoint inhibitor-based combinations have become a standard of care for patients with metastatic renal and liver cancers, as well as for many patients with bladder, cervical, gastric, and esophageal cancers, based on various biomarkers. Some tumor types are less responsive to immunotherapy, such as prostate and colon cancer. In these tumors, however, a subgroup of patients with a microsatellite-instability-high/DNA-mismatch repair deficient molecular phenotype significantly benefits from immunotherapy. Molecular characterization is therefore essential to identify patients who may benefit from these treatments. One of the major challenges is the search for new predictive biomarkers and novel combinations or strategies to further improve patient outcome.


Assuntos
Neoplasias Gastrointestinais , Ginecologia , Neoplasias Hepáticas , Masculino , Humanos , Neoplasias Gastrointestinais/diagnóstico , Neoplasias Gastrointestinais/terapia , Imunoterapia , Rim
17.
Swiss Med Wkly ; 153: 3504, 2023 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-38579317

RESUMO

BACKGROUND: The development of immunotherapy and tyrosine kinase inhibitors dramatically improved the prognosis of metastatic melanoma. Consequently, chemotherapy is now rarely used. Here, we describe the characteristics of long-surviving patients with metastatic melanoma treated with immunochemotherapy. MATERIAL AND METHODS: We retrieved retrospective clinical and pathological data for patients diagnosed with metastatic melanoma between January 1993 and December 2015 who received the CVD-INF (cisplatin, vinblastine, dacarbazine, and interferon α-2b) regimen at the Hôpitaux Universitaires de Genève. We estimated their progression-free survival and overall survival. This ad hoc study's primary aim was to describe the clinical and biological characteristics of long-term survivors, defined as patients surviving more than two years after immunochemotherapy initiation. The spatial distribution pattern of CD8+ T cells (inflamed, excluded, or desert) was immunohistochemically determined. RESULTS: Ninety patients received CVD-INF. Their median age at metastatic melanoma diagnosis was 55 years (20-75). Their median progression-free survival was 2.8 months, and median overall survival was 7.2 months. Eleven (12%) patients were long-term survivors. In multivariate analysis, central nervous system metastases (hazard ratio [HR]: 2.66; 95% confidence interval [CI]: 1.43-4.95; p = 0.001), multiple metastases (HR: 1.82; 95% CI: 1.01-3.29; p = 0.047), and elevated lactate dehydrogenase (LDH) (HR: 1.92; 95% CI: 1.12-3.30; p = 0.016) were independently associated with shorter survival. Most long-survivors (6/8; 75%) had a tumour-inflamed pattern compared to 25% of non-long survivors (5/20; Fisher's test p = 0.030). CONCLUSIONS: A subset of patients with metastatic melanoma and a tumour-inflamed phenotype treated with CVD-INF survived over two years. Factors associated with prolonged survival are consistent with those previously reported in metastatic melanoma.


Assuntos
Doenças Cardiovasculares , Melanoma , Neoplasias Cutâneas , Humanos , Adulto Jovem , Adulto , Pessoa de Meia-Idade , Idoso , Melanoma/tratamento farmacológico , Estudos Retrospectivos , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Resultado do Tratamento , Interleucina-2 , Neoplasias Cutâneas/tratamento farmacológico
18.
J Gastroenterol ; 58(2): 125-134, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36357817

RESUMO

BACKGROUND: Rectal cancers represent 35% of colorectal cancers; 90% are adenocarcinomas, while squamous cell carcinoma accounts for 0.3% of them. Given its rarity, little is known concerning its pathogenesis, molecular profile and therapeutic management. The current treatment trend is to treat rectal squamous cell carcinoma by analogy to anal squamous cell carcinoma with definitive chemo-radiotherapy, setting aside surgery in case of local recurrence. METHODS: We performed an in-depth genomic analysis (next-generation sequencing, copy number variation, and human papilloma virus characterization) on 10 rectal squamous cell carcinoma samples and compared them in silico to those of anal squamous cell carcinoma and rectal adenocarcinoma. RESULTS: Rectal squamous cell carcinoma shows 100% HPV positivity. It has a mutational (PIK3CA, PTEN, TP53, ATM, BCL6, SOX2) and copy number variation profile (3p, 10p, 10q, 16q deletion and 1q, 3q, 5p, 8q, 20p gain) similar to anal squamous cell carcinoma. PI3K/Akt/mTOR is the most commonly affected signaling pathway similarly to anal squamous cell carcinoma. Most commonly gained or lost genes seen in rectal adenocarcinoma (FLT3, CDX2, GNAS, BCL2, SMAD4, MALT1) are not found in rectal squamous cell carcinoma. CONCLUSION: This study presents the first comprehensive genomic characterization of rectal squamous cell carcinoma. We confirm the existence of this rare histology and its molecular similarity with anal squamous cell carcinoma. This molecular proximity confirms the adequacy of therapeutic management based on histology and not localization, suggesting that rectal squamous cell carcinoma should be treated like anal squamous cell carcinoma and not as a rectal adenocarcinoma.


Assuntos
Adenocarcinoma , Carcinoma de Células Escamosas , Neoplasias Retais , Humanos , Variações do Número de Cópias de DNA , Fosfatidilinositol 3-Quinases/genética , Carcinoma de Células Escamosas/genética , Carcinoma de Células Escamosas/terapia , Carcinoma de Células Escamosas/patologia , Neoplasias Retais/genética , Neoplasias Retais/terapia , Neoplasias Retais/patologia , Adenocarcinoma/genética , Adenocarcinoma/terapia , Adenocarcinoma/patologia , Genômica
19.
Front Digit Health ; 5: 1195017, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37388252

RESUMO

Objectives: The objective of this study is the exploration of Artificial Intelligence and Natural Language Processing techniques to support the automatic assignment of the four Response Evaluation Criteria in Solid Tumors (RECIST) scales based on radiology reports. We also aim at evaluating how languages and institutional specificities of Swiss teaching hospitals are likely to affect the quality of the classification in French and German languages. Methods: In our approach, 7 machine learning methods were evaluated to establish a strong baseline. Then, robust models were built, fine-tuned according to the language (French and German), and compared with the expert annotation. Results: The best strategies yield average F1-scores of 90% and 86% respectively for the 2-classes (Progressive/Non-progressive) and the 4-classes (Progressive Disease, Stable Disease, Partial Response, Complete Response) RECIST classification tasks. Conclusions: These results are competitive with the manual labeling as measured by Matthew's correlation coefficient and Cohen's Kappa (79% and 76%). On this basis, we confirm the capacity of specific models to generalize on new unseen data and we assess the impact of using Pre-trained Language Models (PLMs) on the accuracy of the classifiers.

20.
Swiss Med Wkly ; 153: 40108, 2023 08 15.
Artigo em Inglês | MEDLINE | ID: mdl-37598311

RESUMO

The management of prostate cancer is undergoing rapid changes in all disease settings. Novel imaging tools for diagnosis have been introduced, and the treatment of high-risk localized, locally advanced and metastatic disease has changed considerably in recent years. From clinical and health-economic perspectives, a rational and optimal use of the available options is of the utmost importance. While international guidelines list relevant pivotal trials and give recommendations for a variety of clinical scenarios, there is much room for interpretation, and several important questions remain highly debated. The goal of developing a national consensus on the use of these novel diagnostic and therapeutic strategies in order to improve disease management and eventually patient outcomes has prompted a Swiss consensus meeting. Experts from several specialties, including urology, medical oncology, radiation oncology, pathology and nuclear medicine, discussed and voted on questions of the current most important areas of uncertainty, including the staging and treatment of high-risk localized disease, treatment of metastatic hormone-sensitive prostate cancer (mHSPC) and use of new options to treat metastatic castration-resistant prostate cancer (mCRPC).


Assuntos
Neoplasias da Próstata , Masculino , Humanos , Consenso , Suíça , Neoplasias da Próstata/diagnóstico , Neoplasias da Próstata/terapia , Estudos Interdisciplinares , Oncologia
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