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1.
J Proteome Res ; 23(1): 483-493, 2024 01 05.
Artigo em Inglês | MEDLINE | ID: mdl-38109371

RESUMO

Proton magnetic resonance spectroscopy (1H-MRS) of surgically collected tumor specimens may contribute to investigating cancer metabolism and the significance of the "total choline" (tCho) peak (3.2 ppm) as malignancy and therapy response biomarker. To ensure preservation of intrinsic metabolomic information, standardized handling procedures are needed. The effects of time to freeze (cold ischemia) were evaluated in (a) surgical epithelial ovarian cancer (EOC) specimens using high-resolution (HR) 1H-MRS (9.4 T) of aqueous extracts and (b) preclinical EOC samples (xenografts in SCID mice) investigated by in vivo MRI-guided 1H-MRS (4.7 T) and by HR-1H-MRS (9.4 T) of tumor extracts or intact fragments (using magic-angle-spinning (MAS) technology). No significant changes were found in the levels of 27 of 29 MRS-detected metabolites (including the tCho profile) in clinical specimens up to 2 h cold ischemia, besides an increase in lysine and a decrease in glutathione. EOC xenografts showed a 2-fold increase in free choline within 2 h cold ischemia, without further significant changes for any MRS-detected metabolite (including phosphocholine and tCho) up to 6 h. At shorter times (≤1 h), HR-MAS analyses showed unaltered tCho components, along with significant changes in lactate, glutamate, and glutamine. Our results support the view that a time to freeze of 1 h represents a safe threshold to ensure the maintenance of a reliable tCho profile in EOC specimens.


Assuntos
Isquemia Fria , Neoplasias Ovarianas , Camundongos , Animais , Humanos , Feminino , Espectroscopia de Ressonância Magnética/métodos , Camundongos SCID , Metaboloma , Neoplasias Ovarianas/diagnóstico por imagem , Neoplasias Ovarianas/metabolismo , Colina/metabolismo
2.
Int J Cancer ; 154(10): 1842-1856, 2024 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-38289016

RESUMO

Triple negative breast cancers (TNBC) are characterized by a poor prognosis and a lack of targeted treatments. Their progression depends on tumor cell intrinsic factors, the tumor microenvironment and host characteristics. Although adipocytes, the primary stromal cells of the breast, have been determined to be plastic in physiology and cancer, the tumor-derived molecular mediators of tumor-adipocyte crosstalk have not been identified yet. In this study, we report that the crosstalk between TNBC cells and adipocytes in vitro beyond adipocyte dedifferentiation, induces a unique transcriptional profile that is characterized by inflammation and pathways that are related to interaction with the tumor microenvironment. Accordingly, increased cancer stem-like features and recruitment of pro-tumorigenic immune cells are induced by this crosstalk through CXCL5 and IL-8 production. We identified serum amyloid A1 (SAA1) as a regulator of the adipocyte reprogramming through CD36 and P2XR7 signaling. In human TNBC, SAA1 expression was associated with cancer-associated adipocyte infiltration, inflammation, stimulated lipolysis, stem-like properties, and a distinct tumor immune microenvironment. Our findings constitute evidence that the interaction between tumor cells and adipocytes through the release of SAA1 is relevant to the aggressiveness of TNBC.


Assuntos
Neoplasias de Mama Triplo Negativas , Humanos , Neoplasias de Mama Triplo Negativas/patologia , Transdução de Sinais , Células Estromais/patologia , Adipócitos/metabolismo , Inflamação/patologia , Microambiente Tumoral , Proteína Amiloide A Sérica/metabolismo
3.
Acta Oncol ; 63: 213-219, 2024 Apr 21.
Artigo em Inglês | MEDLINE | ID: mdl-38647024

RESUMO

BACKGROUND: Immune checkpoint inhibitors (ICIs) have significantly improved outcomes in various cancers. ICI treatment is associated with the incidence of immune-related adverse events (irAEs) which can affect any organ. Data on irAEs occurrence in relation to sex- differentiation and their association with gender-specific factors are limited. AIMS: The primary objective of the G-DEFINER study is to compare the irAEs incidence in female and male patients who undergo ICI treatment. Secondary objectives are: to compare the irAEs incidence in pre- and postmenopausal female patients; to compare the irAEs incidence in female and male patients according to different clinical and gender-related factors (lifestyle, psychosocial, and behavioral factors). Exploratory objectives of the study are to compare and contrast hormonal, gene-expression, SNPs, cytokines, and gut microbiota profiles in relation to irAEs incidence in female and male patients. METHODS AND RESULTS: The patients are recruited from Fondazione IRCCS Istituto Nazionale dei Tumori, Italy, St Vincent's University Hospital, Ireland, Oslo University Hospital, Norway, and Karolinska Insitutet/Karolinska University Hospital, Sweden. The inclusion of patients was delayed due to the Covid pandemic, leading to a total of 250 patients recruited versus a planned number of 400 patients. Clinical and translational data will be analyzed. INTERPRETATION: The expected outcomes are to improve the management of cancer patients treated with ICIs, leading to more personalized clinical approaches that consider potential toxicity profiles. The real world nature of the trial makes it highly applicable for timely irAEs diagnosis.


Assuntos
Inibidores de Checkpoint Imunológico , Neoplasias , Humanos , Feminino , Masculino , Neoplasias/tratamento farmacológico , Estudos Prospectivos , Inibidores de Checkpoint Imunológico/efeitos adversos , Fatores Sexuais , Incidência , Imunoterapia/efeitos adversos , Imunoterapia/métodos , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos/epidemiologia , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos/etiologia , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos/diagnóstico , Estudos Observacionais como Assunto
4.
Bioinformatics ; 38(10): 2940-2942, 2022 05 13.
Artigo em Inglês | MEDLINE | ID: mdl-35561166

RESUMO

SUMMARY: Hundreds of gene expression signatures have been developed during the last two decades. However, due to the multitude of development procedures and sometimes a lack of explanation for their implementation, it can become challenging to apply the original method on custom data. Moreover, at present, there is no unified and tidy interface to compute signature scores with different single sample enrichment methods. For these reasons, we developed hacksig, an R package intended as a unified framework to obtain single sample scores with a tidy output as well as a collection of manually curated gene signatures and methods from cancer transcriptomics literature. AVAILABILITY AND IMPLEMENTATION: The hacksig R package is freely available on CRAN (https://CRAN.R-project.org/package=hacksig) under the MIT license. The source code can be found on GitHub at https://github.com/Acare/hacksig. SUPPLEMENTARY INFORMATION: Supplementary data are available at Bioinformatics online.


Assuntos
Neoplasias , Transcriptoma , Humanos , Neoplasias/genética , Software
5.
J Neurooncol ; 163(3): 577-586, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-37326761

RESUMO

BACKGROUND: First-line therapies for medulloblastoma(MBL) are obtaining higher survival-rates while decreasing late-effects, but treatment at relapse is not standardized. We report here the experience with MBL re-irradiation(re-RT), its timing and outcome in different clinical settings and tumor groups. METHODS: Patient's staging/treatment at diagnosis, histotypes/molecular subgroups, relapse site/s, re-treatments outcome are reported. RESULTS: 25 patients were included, with a median age of 11.4 years; 8 had metastases. According to 2016-2021 WHO-classification, 14 had SHH subgroup tumors(six TP53 mutated,one + MYC,one + NMYC amplification), 11 non-WNT/non-SHH (two with MYC/MYCN amplification).Thirteen had received HART-CSI, 11 standard-CSI, one HFRT; all post-radiation chemotherapy(CT), 16 also pre-RT. Median time to relapse (local-LR in nine, distant-DR in 14, LR + DR in two) was 26 months. Fourteen patients were re-operated, in five cases excising single DR-sites, thereafter three received CT, two after re-RT; out of 11 patients not re-operated, four had re-RT as first treatment and seven after CT. Re-RT was administered at median 32 months after first RT: focally in 20 cases, craniospinal-CSI in five. Median post-relapse-PFS/after re-RT was 16.7/8.2 months, while overall survival-OS was 35.1/23.9 months, respectively. Metastatic status both at diagnosis/relapse negatively affected outcome and re-surgery was prognostically favorable. PD after re-RT was however significantly more frequent in SHH (with a suggestive association with TP53 mutation, p = 0.050). We did not observe any influence of biological subgroups on PFS from recurrence while SHH showed apparently worse OS compared to non-WNT/non-SHH group. CONCLUSIONS: Re-surgery + reRT can prolong survival; a substantial fraction of patients with worse outcome belongs to the SHH-subgroup.


Assuntos
Neoplasias Encefálicas , Neoplasias Cerebelares , Meduloblastoma , Reirradiação , Humanos , Criança , Meduloblastoma/genética , Prognóstico , Neoplasias Cerebelares/patologia , Recidiva Local de Neoplasia/patologia , Doença Crônica
6.
Pediatr Blood Cancer ; : e30501, 2023 Jun 20.
Artigo em Inglês | MEDLINE | ID: mdl-37338505

RESUMO

INTRODUCTION: Osteosarcoma (OS) is a rare pediatric cancer for which therapeutic approaches, including chemotherapy and surgery, show a wide interindividual variability in patient response, both in terms of adverse events and therapy efficacy. There is growing evidence that this individual variable response to therapies is also influenced by inherited genetic variations. However, the results obtained to date in these pediatric cancers have been contradictory and often lack validation in independent series. Additionally, these studies frequently focused only on a limited number of polymorphisms in candidate genes. METHODS: In order to identify germline coding variations associated with individual differences in adverse events occurrence in pediatric patients affected by localized OS, we carried out an exome-wide association study in 24 OS patients treated with methotrexate, cisplatin, and doxorubicin, using the SNP-Set (Sequence) Kernel Association Test (SKAT), optimized for small sample size. RESULTS: Gene sets significantly associated (FDR < .05) with neutropenia and hepatotoxicity induced by methotrexate were identified. Some of the identified genes map in loci previously associated with similar phenotypes (e.g., leukocyte count, alkaline phosphatase levels). CONCLUSION: Further studies in larger series and with functional characterization of the identified associations are needed; nonetheless, this pilot study prompts the relevance of broadly investigating variants along the whole genome, to identify new potential pharmacogenes, beyond drug metabolism, transport, and receptor candidate genes.

7.
Int J Mol Sci ; 23(22)2022 Nov 13.
Artigo em Inglês | MEDLINE | ID: mdl-36430468

RESUMO

Adolescents and young adults (AYA) with rhabdomyosarcoma (RMS) form a subgroup of patients whose optimal clinical management and best possible access to care remain a challenge and whose survival rates lag behind that of children diagnosed with histologically similar tumors. A better understanding of tumor biology that differentiates children (PEDS-) from AYA-RMS could provide critical information and drive new initiatives to improve their final outcome. We investigated the functional role of miRNAs implicated in AYA-RMS development, as they have the potential to lead to discovery of new targets pathways for a more tailored treatment in these age groups of young RMS patients. MiR-223 and miR-486 were observed de-regulated in nine RMS tissues compared to their normal counterparts, yet only miR-223 replacement impaired proliferation and aggressiveness of AYA-RMS cell lines, while inducing apoptosis and determining cell cycle arrest. Interestingly, IGF1R resulted in the direct target of miR-223 in AYA-RMS cells, as demonstrated by IGF1R silencing. Our results highlight an exclusive functional role of miR-223 in AYA-RMS development and aggressiveness.


Assuntos
MicroRNAs , Rabdomiossarcoma , Criança , Humanos , Adulto Jovem , Adolescente , Linhagem Celular Tumoral , Rabdomiossarcoma/metabolismo , MicroRNAs/genética , MicroRNAs/metabolismo , Apoptose/genética , Taxa de Sobrevida , Receptor IGF Tipo 1/genética
8.
Int J Mol Sci ; 23(24)2022 Dec 13.
Artigo em Inglês | MEDLINE | ID: mdl-36555441

RESUMO

Hyperprogressive disease (HPD), an aggressive acceleration of tumor growth, was observed in a group of cancer patients treated with anti-PD1/PDL1 antibodies. The presence of a peculiar macrophage subset in the tumor microenvironment is reported to be a sort of "immunological prerequisite" for HPD development. These macrophages possess a unique phenotype that it is not clear how they acquire. We hypothesized that certain malignant cells may promote the induction of an "HPD-related" phenotype in macrophages. Bone-marrow-derived macrophages were exposed to the conditioned medium of five non-small cell lung cancer cell lines. Macrophage phenotype was analyzed by microarray gene expression profile and real-time PCR. We found that human NSCLC cell lines, reported as undergoing HPD-like tumor growth in immunodeficient mice, polarized macrophages towards a peculiar pro-inflammatory phenotype sharing both M1 and M2 features. Lipid-based factors contained in cancer cell-conditioned medium induced the over-expression of several pro-inflammatory cytokines and the activation of innate immune receptor signaling pathways. We also determined that tumor-derived Extracellular Vesicles represent the main components involved in the observed macrophage re-education program. The present study might represent the starting point for the future development of diagnostic tools to identify potential hyperprogressors.


Assuntos
Carcinoma Pulmonar de Células não Pequenas , Vesículas Extracelulares , Neoplasias Pulmonares , Humanos , Animais , Camundongos , Carcinoma Pulmonar de Células não Pequenas/patologia , Neoplasias Pulmonares/metabolismo , Meios de Cultivo Condicionados/farmacologia , Meios de Cultivo Condicionados/metabolismo , Macrófagos/metabolismo , Fenótipo , Vesículas Extracelulares/metabolismo , Microambiente Tumoral
9.
Int J Mol Sci ; 23(21)2022 Oct 22.
Artigo em Inglês | MEDLINE | ID: mdl-36361537

RESUMO

An immunosuppressive microenvironment in lung concurs to pre-malignant lesions progression to cancer. Here, we explore if perturbing lung microbiota, which contribute to immunosuppression, by antibiotics or probiotic aerosol interferes with lung cancer development in a mouse carcinogen-induced tumor model. Urethane-injected mice were vancomycin/neomycin (V/N)-aerosolized or live or dead L. rhamnosus GG (L.RGG)-aerosolized, and tumor development was evaluated. Transcriptional profiling of lungs and IHC were performed. Tumor nodules number, diameter and area were reduced by live or heat-killed L.RGG, while only a decrease in nodule diameter was observed in V/N-treated lungs. Both L.RGG and V/N reduced Tregs in the lung. In L.RGG-treated groups, the gene encoding the joining chain (J chain) of immunoglobulins was increased, and higher J chain protein and IgA levels were observed. An increased infiltration of B, NK and myeloid-derived cells was predicted by TIMER 2.0. The Kaplan-Meier plotter revealed an association between high levels of J chain mRNA and good prognosis in lung adenocarcinoma patients that correlated with increased B and CD4 T cells and reduced Tregs and M2 macrophages. This study highlights L.RGG aerosol efficacy in impairing lung cancer growth by promoting local immunity and points to this non-invasive strategy to treat individuals at risk of lung cancer.


Assuntos
Adenoma , Lacticaseibacillus rhamnosus , Neoplasias Pulmonares , Probióticos , Camundongos , Animais , Carcinógenos , Temperatura Alta , Neoplasias Pulmonares/patologia , Probióticos/uso terapêutico , Probióticos/farmacologia , Modelos Animais de Doenças , Microambiente Tumoral
10.
BMC Cancer ; 21(1): 561, 2021 May 17.
Artigo em Inglês | MEDLINE | ID: mdl-34001010

RESUMO

BACKGROUND: Oral Potentially Malignant Disorders (OPMD) have a non-negligible malignant transformation rate of up to 8%. Loss of heterozygosity (LOH) in critical chromosomal loci has proven to be the most effective marker in defining the risk of transformation and it is found in about 28% of OPMD and may therefore identify patients carrying higher risk. To date, clinical management of OPMD is limited to surgical excision and clinical surveillance, which however do not fully prevent oral cancer development. Immune system has been shown to play a key role in transformation surveillance mechanism and an immunosuppressive imbalance may be responsible for progression to cancer. Given all these considerations, we designed a clinical trial with the aim to prevent OPMD neoplastic transformation and revert the LOH status. METHODS: This is a phase II, open label, single arm, multicentric trial involving Italian referral centres and expected to enrol 80 patients out of a total of 175 screened. Patients who meet all inclusion criteria and test positive for LOH after an incisional biopsy of the OPMD will undergo a short course of immunotherapy with 4 administration of avelumab. After 6 months since treatment start, resection of the entire OPMD will be performed and LOH assessment will be repeated. The follow-up for malignant transformation and safety assessment will last 30 months from the end of treatment, for a total planned study duration of approximately 5.5 years. DISCUSSION: Restoring the activity of immune system through checkpoint inhibitor may play a crucial role against malignant transformation of OPMD by reverting the balance in favour of immune control and preventing cancer occurrence. TRIAL REGISTRATION: This trial was prospectively registered in ClinicalTrials.gov as NCT04504552 on 7th August 2020.


Assuntos
Anticorpos Monoclonais Humanizados/administração & dosagem , Inibidores de Checkpoint Imunológico/administração & dosagem , Neoplasias Bucais/epidemiologia , Lesões Pré-Cancerosas/tratamento farmacológico , Evasão Tumoral/efeitos dos fármacos , Adulto , Anticorpos Monoclonais Humanizados/efeitos adversos , Antígeno B7-H1/antagonistas & inibidores , Ensaios Clínicos Fase II como Assunto , Intervalo Livre de Doença , Feminino , Seguimentos , Humanos , Inibidores de Checkpoint Imunológico/efeitos adversos , Itália/epidemiologia , Perda de Heterozigosidade , Masculino , Neoplasias Bucais/genética , Neoplasias Bucais/imunologia , Neoplasias Bucais/prevenção & controle , Estudos Multicêntricos como Assunto , Lesões Pré-Cancerosas/genética , Lesões Pré-Cancerosas/imunologia , Lesões Pré-Cancerosas/mortalidade , Recidiva , Evasão Tumoral/genética , Evasão Tumoral/imunologia , Adulto Jovem
11.
Pediatr Blood Cancer ; 68(7): e28987, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-33751795

RESUMO

BACKGROUND: Rhabdomyosarcoma (RMS), the most frequent soft-tissue sarcoma in childhood, shows extensive heterogeneity in histology, site and age of onset, clinical course, and prognosis. Adolescents and young adults (AYA) with RMS form a subgroup of patients whose survival lacks behind that of children while diagnosed with histologically similar tumors. PROCEDURES: A 67-gene prognostic signature related to chromosome integrity, mitotic control, and genome complexity in sarcomas (CINSARC) is considered a powerful tool for identifying tumors with a highly metastatic potential. With this study, we investigated the prognostic value of CINSARC signature on a cohort of 48 pediatric (PEDs) and AYAs-RMS. RESULTS: CINSARC resulted not significantly correlated with age, suggesting other determinants to be responsible for that difference in survival. It remained a significant prognostic variable in both the groups of PEDs and AYAs. Also, genomic grade index signature was tested on the same cohort and showed very similar results with CINSARC. CONCLUSIONS: Our study showed that CINSARC correlated with outcome in RMS patients and may be potentially considered a tool to predict outcome, and so stratify RMS patients.


Assuntos
Rabdomiossarcoma , Adolescente , Biomarcadores Tumorais/genética , Criança , Genômica , Humanos , Prognóstico , Rabdomiossarcoma/genética , Rabdomiossarcoma Embrionário , Neoplasias de Tecidos Moles/genética , Adulto Jovem
12.
J Minim Invasive Gynecol ; 28(8): 1519-1525, 2021 08.
Artigo em Inglês | MEDLINE | ID: mdl-33373728

RESUMO

STUDY OBJECTIVE: There are growing concerns regarding the potential risk of coronavirus disease transmission during surgery and in particular during minimally invasive procedures owing to the aerosolization of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) particles. However, no study has demonstrated this hypothesis. Here, we aimed to investigate the presence of SARS-CoV-2 in surgical smoke. DESIGN: A prospective pilot study. SETTING: A tertiary cancer center in northern Italy. PATIENTS: Overall, 17 patients underwent laparoscopic procedures for the management of suspected or documented gynecologic malignancies. The median age was 57 years (range 26-77). The surgical indications included endometrial cancer (n = 11), borderline ovarian tumor (n = 3), early-stage ovarian cancer (n = 1), stage IA cervical cancer after diagnostic conization (n = 1), and an ovarian cyst that turned out to be benign at final histologic examination (n = 1). INTERVENTIONS: We evaluated all consecutive women scheduled to have laparoscopic procedures for suspected or documented gynecologic cancers. The patients underwent planned laparoscopic surgery. At the end of the laparoscopic procedures (after extubation), we performed reverse transcription-polymerase chain reaction (RT-PCR) tests for the detection of SARS-CoV-2 from both the endotracheal tube and the filter applied on the trocar valve. MEASUREMENTS AND MAIN RESULTS: In 1 patient, both swab tests (endotracheal tube and trocar valve filter) showed amplification of the N gene on RT-PCR analysis. This case was considered to be a presumptive positive case. In another case, the RT-PCR analysis showed an amplification curve for the N gene only in the swab test performed on the filter. No ORF1ab amplification was detected. CONCLUSION: Our study suggested the proof of principle that SARS-CoV-2 might be transmitted through surgical smoke and aerosolized native fluid from the abdominal cavity.


Assuntos
COVID-19 , Laparoscopia , Adulto , Idoso , Feminino , Humanos , Pessoa de Meia-Idade , Projetos Piloto , Estudos Prospectivos , SARS-CoV-2 , Fumaça/efeitos adversos
13.
Int J Mol Sci ; 22(11)2021 May 27.
Artigo em Inglês | MEDLINE | ID: mdl-34072194

RESUMO

BRAFV600E is the most frequent oncogenic mutation identified in papillary thyroid cancer (PTC). In PTC patients who do not respond to standard treatment, BRAF inhibitors are currently tested as alternative strategies. However, as observed for other targeted therapies, patients eventually develop drug resistance. The mechanisms of BRAF inhibitors response are still poorly understood in a thyroid cancer (TC) context. In this study, we investigated in BRAFV600E mutated TC cell lines the effects of Vemurafenib and Dabrafenib, two BRAF inhibitors currently used in a clinical setting. We assessed cell proliferation, and the expression and activity of the thyroid function related transporter NIS following the treatment with BRAF inhibitors. In addition, we investigated the global gene expression by microarray, the relevant modulated biological processes by gene set enrichment analysis (GSEA), and TC specific gene signatures related to MAPK pathway activation, thyroid differentiation, and transcriptional profile associated with BRAFV600E or RAS mutation. We found that both inhibitors induce antiproliferative and redifferentiative effects on TC cells, as well as a rewiring of the MAPK pathway related to RAS signaling. Our results suggest a possible mechanism of drug response to the BRAF inhibitors Vemurafenib or Dabrafenib, supporting very recent findings in TC patients treated with targeted therapies.


Assuntos
Inibidores de Proteínas Quinases/farmacologia , Proteínas Proto-Oncogênicas B-raf/antagonistas & inibidores , Transdução de Sinais/efeitos dos fármacos , Neoplasias da Glândula Tireoide/metabolismo , Proteínas ras/metabolismo , Biomarcadores Tumorais , Linhagem Celular Tumoral , Biologia Computacional/métodos , Relação Dose-Resposta a Droga , Resistencia a Medicamentos Antineoplásicos/genética , Perfilação da Expressão Gênica , Regulação Neoplásica da Expressão Gênica , Humanos , Mutação , Inibidores de Proteínas Quinases/uso terapêutico , Proteínas Proto-Oncogênicas B-raf/genética , Proteínas Proto-Oncogênicas B-raf/metabolismo , Neoplasias da Glândula Tireoide/tratamento farmacológico , Neoplasias da Glândula Tireoide/etiologia , Neoplasias da Glândula Tireoide/patologia , Transcriptoma
14.
Carcinogenesis ; 41(7): 918-926, 2020 07 14.
Artigo em Inglês | MEDLINE | ID: mdl-32157280

RESUMO

Transcripts originating from the transcriptional read through of two adjacent, similarly oriented genes have been identified in normal and neoplastic tissues, but their functional role and the mechanisms that regulate their expression are mostly unknown. Here, we investigated whether the expression of read-through transcripts previously identified in the non-involved lung tissue of lung adenocarcinoma patients was genetically regulated. Data on genome-wide single nucleotide variant genotypes and expression levels of 10 read-through transcripts in 201 samples of lung tissue were combined to identify expression quantitative trait loci (eQTLs). Then, to identify genes whose expression levels correlated with the 10 read-through transcripts, we used whole transcriptome profiles available for 154 patients. For 8 read-though transcripts, we identified 60 eQTLs (false discovery rate <0.05), including 17 cis-eQTLs and 43 trans-eQTLs. These eQTLs did not maintain their behavior on the 'parental' genes involved in the read-through transcriptional event. The expression levels of 7 read-through transcripts were found to correlate with the expression of other genes: CHIA-PIFO and CTSC-RAB38 correlated with CHIA and RAB38, respectively, while 5 other read-through transcripts correlated with 43 unique non-parental transcripts; thus offering indications about the molecular processes in which these chimeric transcripts may be involved. We confirmed 9 eQTLs (for 4 transcripts) in the non-involved lung tissue from an independent series of 188 lung adenocarcinoma patients. Therefore, this study indicates that the expression of four read-through transcripts in normal lung tissue is under germline genetic regulation, and that this regulation is independent of that of the genes involved in the read-through event.


Assuntos
Adenocarcinoma de Pulmão/genética , Predisposição Genética para Doença , Locos de Características Quantitativas/genética , Transcriptoma/genética , Adenocarcinoma de Pulmão/patologia , Adenocarcinoma de Pulmão/cirurgia , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Regulação Neoplásica da Expressão Gênica/genética , Estudo de Associação Genômica Ampla , Genótipo , Células Germinativas/metabolismo , Células Germinativas/patologia , Humanos , Pulmão/metabolismo , Pulmão/patologia , Masculino , Pessoa de Meia-Idade , Proteínas de Neoplasias/genética , Polimorfismo de Nucleotídeo Único/genética
15.
Mod Pathol ; 32(2): 216-230, 2019 02.
Artigo em Inglês | MEDLINE | ID: mdl-30206415

RESUMO

Breast implant-associated anaplastic large cell lymphoma is a new provisional entity in the revised World Health Organization classification of lymphoid malignancies, the pathogenesis and cell of origin of which are still unknown. We performed gene expression profiling of microdissected breast implant-associated anaplastic large cell lymphoma samples and compared their transcriptional profiles with those previously obtained from normal T-cells and other peripheral T-cell lymphomas and validated expression of selected markers by immunohistochemistry. Our results indicate that most breast implant-associated anaplastic large cell lymphomas exhibit an activated CD4+ memory T-cell phenotype, which is associated with CD25 and FoxP3 expression. Gene ontology analyses revealed upregulation of genes involved in cell motility programs (e.g., CCR6, MET, HGF, CXCL14) in breast implant-associated anaplastic large cell lymphomas compared to normal CD4+ T-cells and upregulation of genes involved in myeloid cell differentiation (e.g., PPARg, JAK2, SPI-1, GAB2) and viral gene transcription (e.g., RPS10, RPL17, RPS29, RPL18A) compared to other types of peripheral T-cell lymphomas. Gene set enrichment analyses also revealed shared features between the molecular profiles of breast implant-associated anaplastic large cell lymphomas and other types of anaplastic large cell lymphomas, including downregulation of T-cell receptor signaling and STAT3 activation. Our findings provide novel insights into the biology of this rare disease and further evidence that breast implant-associated anaplastic large cell lymphoma represents a distinct peripheral T-cell lymphoma entity.


Assuntos
Implantes de Mama/efeitos adversos , Linfoma Anaplásico de Células Grandes/genética , Adulto , Feminino , Humanos , Linfoma de Células T Periférico/genética , Transcriptoma
16.
Br J Cancer ; 119(12): 1487-1494, 2018 12.
Artigo em Inglês | MEDLINE | ID: mdl-30478407

RESUMO

BACKGROUND: Optimising the selection of HER2-targeted regimens by identifying subsets of HER2-positive breast cancer (BC) patients who need more or less therapy remains challenging. We analysed BC samples before and after treatment with 1 cycle of trastuzumab according to the response to trastuzumab. METHODS: Gene expression profiles of pre- and post-treatment tumour samples from 17 HER2-positive BC patients were analysed on the Illumina platform. Tumour-associated immune pathways and blood counts were analysed with regard to the response to trastuzumab. HER2-positive murine models with differential responses to trastuzumab were used to reproduce and better characterise these data. RESULTS: Patients who responded to single-agent trastuzumab had basal tumour biopsies that were enriched in immune pathways, particularly the MHC-II metagene. One cycle of trastuzumab modulated the expression levels of MHC-II genes, which increased in patients who had a complete response on treatment with trastuzumab and chemotherapy. Trastuzumab increased the MHC-II-positive cell population, primarily macrophages, only in the tumour microenvironment of responsive mice. In patients who benefited from complete trastuzumab therapy and in mice that harboured responsive tumours circulating neutrophil levels declined, but this cell subset rose in nonresponsive tumours. CONCLUSIONS: Short treatment with trastuzumab induces local and systemic immunomodulation that is associated with clinical outcomes.


Assuntos
Antineoplásicos Imunológicos/farmacologia , Neoplasias da Mama/tratamento farmacológico , Fatores Imunológicos/farmacologia , Receptor ErbB-2/antagonistas & inibidores , Trastuzumab/farmacologia , Animais , Neoplasias da Mama/imunologia , Feminino , Genes MHC da Classe II , Humanos , Antígeno Ki-67/análise , Camundongos , Receptor ErbB-2/análise , Transcriptoma , Trastuzumab/uso terapêutico , Microambiente Tumoral
18.
BMC Cancer ; 18(1): 899, 2018 Sep 18.
Artigo em Inglês | MEDLINE | ID: mdl-30227835

RESUMO

BACKGROUND: Interactions between cancer cells and the surrounding microenvironment are crucial determinants of cancer progression. During this process, bi-directional communication among tumor cells and cancer associated fibroblasts (CAF) regulate extracellular matrix (ECM) deposition and remodeling. As a result of this dynamic process, soluble ECM proteins can be released into the bloodstream and may represent novel circulating biomarkers useful for cancer diagnosis. The aim of the present study was to measure the levels of three circulating ECM related proteins (COL11A1, COL10A1 and SPARC) in plasma samples of lung cancer patients and in healthy heavy-smokers controls and test whether such measurements have diagnostic or prognostic value. METHODS: Gene expression profiling of lung fibroblasts isolated from paired normal and cancer tissue of NSCLC patients was performed by gene expression microarrays. The prioritization of the candidates for the study of circulating proteins in plasma was based on the most differentially expressed genes in cancer associated fibroblasts. Soluble ECM proteins were assessed by western blot in the conditioned medium of lung fibroblasts and by ELISA assays in plasma samples. RESULTS: Plasma samples from lung cancer patients and healthy heavy-smokers controls were tested for levels of COL11A1 and COL10A1 (n = 57 each) and SPARC (n = 90 each). Higher plasma levels of COL10A1 were detected in patients (p ≤ 0.001), a difference that was driven specifically by females (p < 0.001). No difference in COL11A1 levels between patients and controls was found. SPARC levels were also higher in plasma patients than controls (p < 0.001) with good performance in discriminating the two groups (AUC = 0.744). No significant association was observed between plasma proteins levels and clinicopathological features or survival. CONCLUSION: Soluble factors related to proficient tumor-stroma cross-talk are detectable in plasma of primary lung cancer patients and may represent a valuable complementary diagnostic tool to discriminate lung cancer patients from healthy heavy-smokers individuals as shown for the SPARC protein.


Assuntos
Carcinoma Pulmonar de Células não Pequenas/sangue , Colágeno Tipo XI/sangue , Colágeno Tipo X/sangue , Osteonectina/sangue , Idoso , Carcinoma Pulmonar de Células não Pequenas/genética , Carcinoma Pulmonar de Células não Pequenas/patologia , DNA Tumoral Circulante/sangue , Intervalo Livre de Doença , Matriz Extracelular , Proteínas da Matriz Extracelular/sangue , Proteínas da Matriz Extracelular/genética , Feminino , Regulação Neoplásica da Expressão Gênica , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico , Caracteres Sexuais , Fumantes
19.
J Neurooncol ; 138(3): 679-680, 2018 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-29767306

RESUMO

The therapeutic experience reported in the paper was conceived after the use of nimotuzumab and radiotherapy (BSCPED-05 international multicentric trial, EUDRACT 2005-003100-11) in 2009 when we decided to explore the activity of the same combination plus vinorelbine (see the paper for the rationale).

20.
Curr Treat Options Oncol ; 19(12): 62, 2018 10 25.
Artigo em Inglês | MEDLINE | ID: mdl-30361937

RESUMO

OPINION STATEMENT: Head and neck cancers can be used as a paradigm for exploring "big data" applications in oncology. Computational strategies derived from big data science hold the promise of shedding new light on the molecular mechanisms driving head and neck cancer pathogenesis, identifying new prognostic and predictive factors, and discovering potential therapeutics against this highly complex disease. Big data strategies integrate robust data input, from radiomics, genomics, and clinical-epidemiological data to deeply describe head and neck cancer characteristics. Thus, big data may advance research generating new knowledge and improve head and neck cancer prognosis supporting clinical decision-making and development of treatment recommendations.


Assuntos
Big Data , Sistemas de Apoio a Decisões Clínicas , Neoplasias de Cabeça e Pescoço/genética , Neoplasias de Cabeça e Pescoço/radioterapia , Neoplasias de Cabeça e Pescoço/patologia , Humanos , Aprendizado de Máquina , Prognóstico , Máquina de Vetores de Suporte , Inquéritos e Questionários
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