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1.
Heliyon ; 9(11): e21853, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-38027900

RESUMO

The detection of RAS mutations and co-mutations in liquid biopsy offers a novel paradigm for the dynamic management of metastatic colorectal cancer (mCRC) patients. Expanding the results of the prospective OMITERC (OMIcs application from solid to liquid biopsy for a personalized ThERapy of Cancer) project, we collected blood samples at specific time points from patients who received a first-line chemotherapy (CT) for KRAS-mutated mCRC. CTC quantification was performed by CellSearch® system. Libraries from cfDNA were prepared using the Oncomine™ Colon cfDNA Assay to detect tumour-derived DNA in cfDNA. The analysis involved >240 hotspots in 14 genes. Twenty patients with KRAS-mutated mCRC treated at the Medical Oncology Unit of Careggi University Hospital were prospectively enrolled. Nine patients had available data for longitudinal monitoring of cfDNA. After 6 weeks of first-line CT an increase of KRAS-mutated clone was reported in the only patient who did not obtain disease control, while all patients with decrease of KRAS clones obtained disease control. Overall, in patients with a short (<9 months) progression-free survival (PFS) we registered, at 6 weeks, an increase in cfDNA levels and in KRAS mutations or other co-mutations, i.e. PIK3CA, FBXW7, GNAS, and TP53. In selected cases, co-mutations were able to better anticipate radiological progressive disease (PD) than the increase of KRAS-mutated clones. In conclusion, our study confirms plasma ctDNA as a crucial tool for anticipating PD at an early time point and highlights the value of a comprehensive assessment of clonal dynamics to improve the management of patients with mCRC.

2.
Histopathology ; 81(3): 389-401, 2022 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-35791778

RESUMO

OBJECTIVE: Chondroblastoma-like osteosarcoma (CBLOS) is a rare and poorly understood variant of OS. We examined the clinicopathological, immunohistochemical and molecular features of six CBLOSs to highlight the differences with conventional high-grade OS (CHGOS) and CB, including CB with aggressive features. METHODS: We performed histone 3.3 mutation analysis by gene sequencing and/or immunohistochemistry in all cases, while whole exome sequencing (WES) was performed on two CB-like osteosarcomas and 11 conventional high-grade OS. RESULTS: CBLOSs were predominantly localised at acral sites and involved mainly male subjects with a mean age of 29 years. One patient who had metastases at presentation died of disease, while another patient who developed multiple local recurrences and lung metastases was alive with no evidence of disease (ANED) at 294 months. The remaining patients were ANED after a mean interval of 70.8 months. Histologically, all CBLOS presented aggressive features, including nuclear atypia and infiltrative growth. Immunohistochemistry with H3F3 K36M mutant antibody was negative in all CBLOSs, and none of the five tumours tested by gene sequencing had H3F3B mutations. Conversely, all CBs presented the H3F3B K36M variant and were positive for immunostaining with the H3F3 K36M antibody. Two CBLOSs analysed by WES differed in amount and type of mutation from 11 cases of CHGOS. Moreover, CBLOSs showed lower copy number alteration (CNA) score values than CHGOSs. CONCLUSIONS: CBLOS presents a different genetic background and a less aggressive clinical behaviour in comparison with CHGOS. Search of the H3F3B K36M mutation is useful in the differential diagnosis with CB.


Assuntos
Neoplasias Ósseas , Condroblastoma , Osteossarcoma , Adulto , Anticorpos , Neoplasias Ósseas/patologia , Condroblastoma/diagnóstico , Condroblastoma/genética , Condroblastoma/patologia , Feminino , Histonas/genética , Humanos , Imuno-Histoquímica , Masculino , Osteossarcoma/patologia
3.
Br J Cancer ; 125(1): 94-100, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-33953347

RESUMO

BACKGROUND: Within the OMITERC prospective study (OMIcs application from solid to liquid biopsy for a personalised ThERapy of Cancer), we explored the prognostic role of liquid biopsy encompassing cell-free DNA (cfDNA) and circulating tumour cells (CTCs) in KRAS mutated metastatic colorectal cancer (mCRC). METHODS: We defined a workflow including pre-analytical and analytical procedures collecting blood before therapy and every 3 months until disease progression (PD). CTCs were counted by CellSearch® and isolated by DEPArray™. NGS sequencing of CTCs and cfDNA was performed using a panel of cancer/CRC related genes respectively. RESULTS: KRAS mutational status was mostly concordant between tumour tissues and liquid biopsy. The percentage of cfDNA samples with mutations in CRC driver genes was in line with literature. In longitudinal monitoring circulating biomarkers anticipated or overlapped conventional diagnostic tools in predicting PD. The presence of CTCs at baseline was confirmed a negative prognostic marker. CONCLUSIONS: Cell-free DNA and CTCs are readily available candidates for clinical application in mCRC. While CTCs demonstrated a prognostic significance at baseline, cfDNA was confirmed an easily accessible material for monitoring the mutational status of the tumour over time. Moreover, in the longitudinal study, the two markers emerged as complementary in assessing disease progression.


Assuntos
Biomarcadores Tumorais/genética , Ácidos Nucleicos Livres/genética , Neoplasias Colorretais/patologia , Células Neoplásicas Circulantes/patologia , Proteínas Proto-Oncogênicas p21(ras)/genética , Análise de Sequência de DNA/métodos , Idoso , Idoso de 80 Anos ou mais , Neoplasias Colorretais/genética , Progressão da Doença , Feminino , Sequenciamento de Nucleotídeos em Larga Escala , Humanos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Mutação , Metástase Neoplásica , Prognóstico , Estudos Prospectivos
4.
J Biophotonics ; 14(3): e202000365, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-33305912

RESUMO

Malignant melanoma is an aggressive form of skin cancer, which develops from the genetic mutations of melanocytes - the most frequent involving BRAF and NRAS genes. The choice and the effectiveness of the therapeutic approach depend on tumour mutation; therefore, its assessment is of paramount importance. Current methods for mutation analysis are destructive and take a long time; instead, Raman spectroscopy could provide a fast, label-free and non-destructive alternative. In this study, confocal Raman microscopy has been used for examining three in vitro melanoma cell lines, harbouring different molecular profiles and, in particular, specific BRAF and NRAS driver mutations. The molecular information obtained from Raman spectra has served for developing two alternative classification algorithms based on linear discriminant analysis and artificial neural network. Both methods provide high accuracy (≥90%) in discriminating all cell types, suggesting that Raman spectroscopy may be an effective tool for detecting molecular differences between melanoma mutations.


Assuntos
Melanoma , Neoplasias Cutâneas , Linhagem Celular , Humanos , Melanócitos , Melanoma/genética , Mutação , Neoplasias Cutâneas/genética , Aprendizado de Máquina Supervisionado
5.
N Biotechnol ; 55: 19-29, 2020 Mar 25.
Artigo em Inglês | MEDLINE | ID: mdl-31580920

RESUMO

The term 'liquid biopsy', introduced in 2013 in reference to the analysis of circulating tumour cells (CTCs) in cancer patients, was extended to cell-free nucleic acids (cfNAs) circulating in blood and other body fluids. CTCs and cfNAs are now considered diagnostic and prognostic markers, used as surrogate materials for the molecular characterisation of solid tumours, in particular for research on tumour-specific or actionable somatic mutations. Molecular characterisation of cfNAs and CTCs (especially at the single cell level) is technically challenging, requiring highly sensitive and specific methods and/or multi-step processes. The analysis of the liquid biopsy relies on a plethora of methods whose standardisation cannot be accomplished without disclosing criticisms related to the pre-analytical phase. Thus, pre-analytical factors potentially influencing downstream cellular and molecular analyses must be considered in order to translate the liquid biopsy approach into clinical practice. The present review summarises the most recent reports in this field, discussing the main pre-analytical aspects related to CTCs, cfNAs and exosomes in blood samples for liquid biopsy analysis. A short discussion on non-blood liquid biopsy samples is also included.


Assuntos
Biópsia Líquida/métodos , Fase Pré-Analítica/métodos , Animais , Líquidos Corporais/metabolismo , Ácidos Nucleicos Livres/análise , Exossomos/metabolismo , Humanos , Células Neoplásicas Circulantes/patologia
6.
Diagnostics (Basel) ; 9(3)2019 Sep 12.
Artigo em Inglês | MEDLINE | ID: mdl-31547467

RESUMO

Next Generation Sequencing (NGS) is a promising tool for the improvement of tumor molecular profiling in view of the identification of a personalized treatment in oncologic patients. To verify the potentiality of a targeted NGS (Ion AmpliSeq™ Cancer Hotspot Panel v2), selected melanoma samples (n = 21) were retrospectively analyzed on S5 platform in order to compare NGS performance with the conventional techniques adopted in our routine clinical setting (Sequenom MassARRAY system, Sanger sequencing, allele-specific real-time PCR). The capability in the identification of rare and low-frequency mutations in the main genes involved in melanoma (BRAF and NRAS genes) was verified and integrated with the results deriving from other oncogenes and tumor suppressor genes. The analytical evaluation was carried out by the analysis of DNA derived from control cell lines and FFPE (Formalin-Fixed, Paraffin-Embedded) samples to verify that the achieved resolution of uncommon mutations and low-frequency variants was suitable to meet the technical and clinical requests. Our results demonstrate that the amplicon-based NGS approach can reach the sensitivity proper of the allele-specific assays together with the high specificity of a sequencing method. An overall concordance among the tested methods was observed in the identification of classical and uncommon mutations. The assessment of the quality parameters and the comparison with the orthogonal methods suggest that the NGS method could be implemented in the clinical setting for melanoma molecular characterization.

7.
Int J Cancer ; 145(9): 2580-2593, 2019 11 01.
Artigo em Inglês | MEDLINE | ID: mdl-30973654

RESUMO

Five-year overall survival of stage III colorectal cancer (CRC) patients treated with standard adjuvant chemotherapy (ACHT) is highly variable. Genomic biomarkers and/or transcriptomic profiles identified lack of adequate validation. Aim of our study was to identify and validate molecular biomarkers predictive of ACHT response in stage III CRC patients by a transcriptomic approach. From a series of CRC patients who received ACHT, two stage III extreme cohorts (unfavorable vs. favorable prognosis) were selected. RNA-sequencing was performed from fresh frozen explants. Tumors were characterized for somatic mutations. Validation was performed in stage III CRC patients extracted from two GEO datasets. According to disease-free survival (DFS), 108 differentially expressed genes (104/4 up/downregulated in the unfavorable prognosis group) were identified. Among 104 upregulated genes, 42 belonged to olfactory signaling pathways, 62 were classified as pseudogenes (n = 17), uncharacterized noncoding RNA (n = 10), immune response genes (n = 4), microRNA (n = 1), cancer-related genes (n = 14) and cancer-unrelated genes (n = 16). Three out of four down-regulated genes were cancer-related. Mutational status (i.e., RAS, BRAF, PIK3CA) did not differ among the cohorts. In the validation cohort, multivariate analysis showed high PNN and KCNQ1OT1 expression predictive of shorter DFS in ACHT treated patients (p = 0.018 and p = 0.014, respectively); no difference was observed in untreated patients. This is the first study that identifies by a transcriptomic approach and validates PNN and KCNQ1OT1 as molecular biomarkers predictive of chemotherapy response in stage III CRC patients. After a further validation in an independent cohort, PNN and KCNQ1OT1 evaluation could be proposed to prospectively identify stage III CRC patients benefiting from ACHT.


Assuntos
Biomarcadores Tumorais/genética , Moléculas de Adesão Celular/genética , Neoplasias Colorretais/genética , Proteínas Nucleares/genética , Idoso , Quimioterapia Adjuvante/métodos , Classe I de Fosfatidilinositol 3-Quinases/genética , Estudos de Coortes , Neoplasias Colorretais/patologia , Intervalo Livre de Doença , Regulação para Baixo/genética , Feminino , Perfilação da Expressão Gênica/métodos , Humanos , Masculino , Pessoa de Meia-Idade , Mutação/genética , Estadiamento de Neoplasias/métodos , Canais de Potássio de Abertura Dependente da Tensão da Membrana/genética , Prognóstico , Análise de Sequência de RNA/métodos , Transdução de Sinais/genética , Transcriptoma/genética , Regulação para Cima/genética
8.
Clin Drug Investig ; 39(2): 169-178, 2019 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-30523522

RESUMO

BACKGROUND AND OBJECTIVE: Clinical practice guidelines recommend antipsychotic monotherapy, including oral and long-acting formulations, in the treatment of schizophrenia. This open-label, randomized, controlled trial aimed to evaluate the efficacy and tolerability in patients with schizophrenia of once-monthly long-acting paliperidone palmitate (PP1M) compared with oral paliperidone extended release (ER), with a particular focus on satisfaction, subjective well-being, and service engagement. METHODS: Seventy-two consecutive outpatients with schizophrenia (DSM-5) were randomly assigned for 6 months to: (1) PP1M (50-150 mg equivalent) or (2) paliperidone ER (6-12 mg/day). Participants were assessed at baseline and after 6 months with the Treatment Satisfaction Questionnaire for Medication (TSQM); the Subjective Well-being under Neuroleptics Scale (SWN-K); the Service Engagement Scale (SES); the Clinical Global Impression-Schizophrenia (CGI-SCH); and the Personal and Social Performance (PSP) score. ANOVA repeated measures was performed. Intention-to-treat analysis with last observation carried forward was conducted. RESULTS: We found a significant within-subjects effect (trial duration) for all rating scale except for cognitive symptoms and the TSQM domain "side effects". A significant effect between subjects (treatment modality) was found for the CGI negative symptoms, the TSQM domains "overall satisfaction" and "convenience," and the SES. There were seven drop-outs (9.7%): twi due to hyperprolactinemia and five for lack of compliance. CONCLUSIONS: Significant differences between the two formulations were found. PP1M was superior to paliperidone ER on global treatment satisfaction and convenience, on service engagement, and in reducing negative symptoms. The trial was registered in the Australian New Zealand Clinical Trials Registry (ANZCTR) with the code: ACTRN12618001113246.


Assuntos
Antipsicóticos/uso terapêutico , Palmitato de Paliperidona/uso terapêutico , Esquizofrenia/tratamento farmacológico , Administração Oral , Adulto , Assistência Ambulatorial , Preparações de Ação Retardada , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Palmitato de Paliperidona/efeitos adversos , Satisfação do Paciente
9.
Clin Chem Lab Med ; 56(12): 1981-1991, 2018 11 27.
Artigo em Inglês | MEDLINE | ID: mdl-29990304

RESUMO

In contrast to population-based medical decision making, which emphasizes the use of evidence-based treatment strategies for groups of patients, personalized medicine is based on optimizing treatment at the level of the individual patient. The creation of molecular profiles of individual patients was made possible by the advent of "omics" technologies, based on high throughput instrumental techniques in combination with biostatistics tools and artificial intelligence. The goal of personalized laboratory medicine is to use advanced technologies in the process of preventive, curative or palliative patient management. Personalized medicine does not rely on changes in concentration of a single molecular marker to make a therapeutic decision, but rather on changes of a profile of markers characterizing an individual patient's status, taking into account not only the expected response to treatment of the disease but also the expected response of the patient. Such medical approach promises a more effective diagnostics with more effective and safer treatment, as well as faster recovery and restoration of health and improved cost effectiveness. The laboratory medicine profession is aware of its key role in personalized medicine, but to empower the laboratories, at least an enhancement in cooperation between disciplines within laboratory medicine will be necessary.


Assuntos
Ciência de Laboratório Médico , Assistência Centrada no Paciente , Medicina de Precisão , Humanos
10.
Mol Ther Methods Clin Dev ; 9: 225-233, 2018 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-29766030

RESUMO

Gene therapy has been shown to be a feasible approach to treat inherited disorders in vivo. Among the currently used viral vector systems, adeno-associated virus (AAV) vectors are the most advanced and have been applied in patients successfully. An important drawback of non-integrating AAV vectors is their loss of expression upon cell division, while repeating systemic administration lacks efficacy due to the induction of neutralizing antibodies. In addition, a significant percentage of the general population is not eligible for AAV-mediated gene therapy due to pre-existing immunity. Development of additional viral vectors may overcome this hurdle. Simian virus 40 (SV40)-derived vectors have been reported to transduce different tissues, including the liver, and prevalence of neutralizing antibodies in the general population is very low. This renders recombinant SV40 (rSV40) vector an interesting candidate for effective (re-)administration. Clinical use of SV40 vectors is in part hampered by less advanced production methods compared to AAVs. To optimize the production of rSV40 and make it better suitable for clinical practice, we developed a production system that relies on Cre recombinase-mediated removal of the bacterial plasmid backbone.

11.
Hum Pathol ; 68: 128-135, 2017 10.
Artigo em Inglês | MEDLINE | ID: mdl-28899740

RESUMO

Mutually exclusive histone 3.3 gene mutations have been recognized in chondroblastoma and giant cell tumor of bone (GCTB), which may be useful for differential diagnostic purposes in morphologically ambiguous cases. Although more than 90% of GCTBs present histone 3.3 variants exclusively in the H3F3A gene, chondroblastoma is mutated mainly in H3F3B. In this study, we examined a series of giant cell-rich primary bone tumors, aiming to evaluate the possible diagnostic role of histone 3.3 mutations in the differential diagnosis between GCTB and giant cell-rich sarcomas. Sixteen cases of nonmetastatic GCTB, 9 GCTBs with lung metastases, and 35 giant cell-rich sarcomas were selected from our institutional archives. Eight chondroblastomas were used as controls. Direct sequencing for the presence of H3F3A and H3F3B variants in coding region between codons 1 and 42, including the hotspot codons (28, 35, and 37), was performed on DNA extracted from formalin-fixed, paraffin-embedded tissue using conventional polymerase chain reaction and fast coamplification at lower denaturation temperature-polymerase chain reaction. Overall, 24 GCTBs (96%) presented a mutation in the H3F3A gene (15 of 16 nonmetastatic and 9 of 9 metastatic). Five sarcomas harbored an H3F3A mutation (3 p.G35W, 1 p.G35L, and 1 p.G35E), and these were all secondary malignant GCTBs. In conclusion, we confirm that H3F3A mutational testing may be a useful adjunct to differentiate GCTB from giant cell-rich sarcomas. Although the presence of H3F3A mutations does not exclude with certainty a diagnosis of sarcoma, the possibility of a malignant evolution of GCTB should also be considered.


Assuntos
Biomarcadores Tumorais/genética , Neoplasias Ósseas/genética , Tumor de Células Gigantes do Osso/genética , Histonas/genética , Mutação , Osteossarcoma/genética , Adolescente , Adulto , Idoso , Neoplasias Ósseas/patologia , Criança , Pré-Escolar , Análise Mutacional de DNA , Diagnóstico Diferencial , Feminino , Tumor de Células Gigantes do Osso/secundário , Humanos , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/secundário , Masculino , Pessoa de Meia-Idade , Osteossarcoma/patologia , Valor Preditivo dos Testes , Adulto Jovem
12.
Mol Ther Methods Clin Dev ; 6: 124-134, 2017 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-28791314

RESUMO

Replication-defective (RD) recombinant simian virus 40 (SV40)-based gene delivery vectors hold a great potential for clinical applications because of their presumed non-immunogenicity and capacity to induce immune tolerance to the transgene products in humans. However, the clinical use of SV40 vectors has been hampered by the lack of a packaging cell line that produces replication-competent (RC) free SV40 particles in the vector production process. To solve this problem, we have adapted the current SV40 vector genome used for the production of vector particles and generated a novel Vero-based packaging cell line named SuperVero that exclusively expresses the SV40 large T antigen. SuperVero cells produce similar numbers of SV40 vector particles compared to the currently used packaging cell lines, albeit in the absence of contaminating RC SV40 particles. Our unique SV40 vector platform named SVac paves the way to clinically test a whole new generation of SV40-based therapeutics for a broad range of important diseases.

13.
Int J Mol Sci ; 18(7)2017 Jun 24.
Artigo em Inglês | MEDLINE | ID: mdl-28672797

RESUMO

Cell-free DNA (cfDNA) quantity and quality in plasma has been investigated as a non-invasive biomarker in cancer. Previous studies have demonstrated increased cfDNA amount and length in different types of cancer with respect to healthy controls. The present study aims to test the hypothesis that the presence of longer DNA strands circulating in plasma can be considered a biomarker for tumor presence in thyroid cancer. We adopted a quantitative real-time PCR (qPCR) approach based on the quantification of two amplicons of different length (67 and 180 bp respectively) to evaluate the integrity index 180/67. Cell-free DNA quantity and integrity were higher in patients affected by nodular thyroid diseases than in healthy controls. Importantly, cfDNA integrity index was higher in patients with cytological diagnosis of thyroid carcinoma (Thy4/Thy5) than in subjects with benign nodules (Thy2). Therefore, cfDNA integrity index 180/67 is a suitable parameter for monitoring cfDNA fragmentation in thyroid cancer patients and a promising circulating biomarker in the diagnosis of thyroid nodules.


Assuntos
Biomarcadores Tumorais , Ácidos Nucleicos Livres , DNA de Neoplasias , Neoplasias da Glândula Tireoide/diagnóstico , Neoplasias da Glândula Tireoide/genética , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Estudos de Casos e Controles , Fragmentação do DNA , Feminino , Humanos , Biópsia Líquida , Masculino , Pessoa de Meia-Idade , Curva ROC , Reprodutibilidade dos Testes , Sensibilidade e Especificidade , Neoplasias da Glândula Tireoide/patologia , Neoplasias da Glândula Tireoide/cirurgia , Adulto Jovem
14.
Histopathology ; 71(3): 453-460, 2017 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-28477388

RESUMO

AIMS: Giant-cell tumour (GCT) of soft tissue (GCT-ST) is a primary soft tissue neoplasm that is histologically similar to GCT of bone (GCT-B). Recently, it has been reported that >90% of GCT-Bs have a driver mutation in the H3F3A gene. As the relationship between GCT-ST and GCT-B is unclear, the aim of this study was to compare a series of GCT-STs and GCT-Bs with regard to the presence of H3F3A mutations and several immunophenotypic markers. METHODS AND RESULTS: Eight GCT-STs were retrieved from our institutional archives. Fifteen GCT-Bs served as controls. Direct sequencing for H3F3A mutations in coding regions between codons 1 and 42, including the hotspot codons (28, 35, and 37), was performed on DNA extracted from formalin-fixed paraffin-embedded tissue. Tumours were studied immunohistochemically for the expression of CD14, CD33, RANKL, RANK, p63, and the osteoblastic markers SATB2 and RUNX2. None of the seven GCT-STs that could be analysed showed H3F3A mutations, whereas 14 GCT-Bs (93.3%) were mutated. All eight GCT-STs were positive for RANK and RUNX2, whereas RANKL and SATB2 were detected in only two cases (25%). CD14 was detected only in mononuclear elements, whereas multinucleated giant cells and a proportion of the mononuclear population expressed CD33. Few mononuclear cells of GCT-STs expressed p63. In comparison, GCT-Bs showed higher expression of p63 (14 of 15 cases with >50% of positive mononuclear cells), RANKL, and SATB2, whereas CD14, CD33, RANK and RUNX2 were similarly expressed. CONCLUSIONS: Although GCT-ST and GCT-B are similar in histological appearance, our results indicate that they are immunophenotypically and genetically distinct.


Assuntos
Biomarcadores Tumorais/análise , Neoplasias Ósseas/genética , Tumor de Células Gigantes do Osso/genética , Tumores de Células Gigantes/genética , Neoplasias de Tecidos Moles/genética , Adolescente , Adulto , Idoso , Biomarcadores Tumorais/genética , Biomarcadores Tumorais/imunologia , Neoplasias Ósseas/patologia , Criança , Feminino , Genótipo , Tumor de Células Gigantes do Osso/imunologia , Tumor de Células Gigantes do Osso/patologia , Tumores de Células Gigantes/imunologia , Tumores de Células Gigantes/patologia , Humanos , Masculino , Pessoa de Meia-Idade , Fenótipo , Neoplasias de Tecidos Moles/imunologia , Neoplasias de Tecidos Moles/patologia , Adulto Jovem
15.
Psychiatry Res ; 244: 317-23, 2016 Oct 30.
Artigo em Inglês | MEDLINE | ID: mdl-27517342

RESUMO

Aims of the current study were to explore differences in coping between 58 patients with schizoaffective disorder (SAD) and 89 with schizophrenia (SZ) and to identify factors associated with coping in both disorders. The demographic and clinical characteristics of patients with SAD and with SZ were compared using ANOVA and χ(2). Pearson's correlations were calculated between coping styles and socio-demographic and clinical variables in each group. The significant ones were subsequently analyzed using multiple regressions. Patients with SAD used emotion oriented coping more frequently than patients 2016with SZ. In patients with SAD, self-esteem contributed to task-oriented; avolition-anhedonia (AA) to emotion-oriented; duration of illness and years of education to distraction; AA to social diversion. In patients with SZ, AA, the mental component summary score of the Short Form - 36 Health Survey (SF-36) and self-esteem contributed to emotion oriented coping; the mental component summary score of SF-36 to distraction; AA to social diversion. Our results suggest that patients with SAD and SZ use diverse coping strategies. A greater attention must be given to the presence of self-esteem and AA in individuals with both disorders. These factors are potentially modifiable from specific therapeutic interventions, which can produce effects on coping strategies.


Assuntos
Adaptação Psicológica , Transtornos Psicóticos/psicologia , Esquizofrenia , Psicologia do Esquizofrênico , Adulto , Anedonia , Emoções , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Autoimagem
16.
Oncotarget ; 7(18): 26107-19, 2016 May 03.
Artigo em Inglês | MEDLINE | ID: mdl-27034166

RESUMO

Circulating Tumor Cells (CTCs) represent a "liquid biopsy" of the tumor potentially allowing real-time monitoring of cancer biology and therapies in individual patients.The purpose of the study was to explore the applicability of a protocol for the molecular characterization of single CTCs by Next Generation Sequencing (NGS) in order to investigate cell heterogeneity and provide a tool for a personalized medicine approach.CTCs were enriched and enumerated by CellSearch in blood from four metastatic breast cancer patients and singularly isolated by DEPArray. Upon whole genome amplification 3-5 single CTCs per patient were analyzed by NGS for 50 cancer-related genes.We found 51 sequence variants in 25 genes. We observed inter- and intra-patient heterogeneity in the mutational status of CTCs.The highest number of somatic deleterious mutations was found in the gene TP53, whose mutation is associated with adverse prognosis in breast cancer.The discordance between the mutational status of the primary tumor and CTCs observed in 3 patients suggests that, in advanced stages of cancer, CTC characteristics are more closely linked to the dynamic modifications of the disease status.In one patient the mutational profiles of CTCs before and during treatment shared only few sequence variants.This study supports the applicability of a non-invasive approach based on the liquid biopsy in metastatic breast cancer patients which, in perspective, should allow investigating the clonal evolution of the tumor for the development of new therapeutic strategies in precision medicine.


Assuntos
Biomarcadores Tumorais/genética , Neoplasias da Mama/genética , Análise Mutacional de DNA/métodos , Sequenciamento de Nucleotídeos em Larga Escala/métodos , Mutação , Células Neoplásicas Circulantes/patologia , Neoplasias da Mama/secundário , Feminino , Humanos , Prognóstico , Análise de Célula Única , Taxa de Sobrevida , Proteína Supressora de Tumor p53/genética
17.
J Clin Pathol ; 69(3): 240-7, 2016 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-26338802

RESUMO

AIMS: Denosumab, a fully human monoclonal antibody directed against RANKL, has recently been introduced in the treatment strategy of giant cell tumour of bone (GCTB). Aim of this study was to investigate the phenotypical modifications induced by denosumab treatment in a series of 15 GCTB. METHODS: The tumours were characterised for histone 3.3 mutations, and studied immunohistochemically for the modifications of RANKL, RANK, SATB2 and RUNX2 expression, as well as of tumour proliferative activity and angiogenesis. RESULTS: Nine of 11 tumours investigated presented a histone 3.3 mutation in H3F3A, and 2 of these for which the analysis was carried out in pretreatment and post-treatment specimens showed the same mutation in both. Denosumab induced the disappearance of osteoclast-like giant cells, leaving residual spindle neoplastic cells arranged in a storiform pattern, with deposition of trabecular collagen matrix and osteoid, which tended to maturation in the peripheral portions of the lesion. RANK and RANKL expression was variable, with no significant variation after treatment. Moreover, we did not observe any significant modification of the expression of the osteoblastic markers SATB2 and RUNX2. Denosumab treatment determined a significant reduction of the proliferative index and of tumour angiogenesis (p=0.001, Wilcoxon rank-sum test). CONCLUSIONS: These results indicate that denosumab induces a partial maturation towards the osteoblastic phenotype of the neoplastic cells of GCTB, with production of fibrous and osteoid matrix, but with minor immunophenotypical changes. Finally, we first report an antiangiogenic activity of denosumab in GCTB, possibly mediated by a RANKL-dependent pathway.


Assuntos
Inibidores da Angiogênese/uso terapêutico , Biomarcadores Tumorais , Conservadores da Densidade Óssea/uso terapêutico , Neoplasias Ósseas/tratamento farmacológico , Análise Mutacional de DNA , Denosumab/uso terapêutico , Tumor de Células Gigantes do Osso/tratamento farmacológico , Imuno-Histoquímica , Adolescente , Adulto , Idoso , Biomarcadores Tumorais/genética , Biomarcadores Tumorais/metabolismo , Neoplasias Ósseas/genética , Neoplasias Ósseas/metabolismo , Neoplasias Ósseas/patologia , Proliferação de Células/efeitos dos fármacos , Subunidade alfa 1 de Fator de Ligação ao Core/metabolismo , Feminino , Tumor de Células Gigantes do Osso/genética , Tumor de Células Gigantes do Osso/metabolismo , Tumor de Células Gigantes do Osso/patologia , Histonas/genética , Humanos , Masculino , Proteínas de Ligação à Região de Interação com a Matriz/metabolismo , Pessoa de Meia-Idade , Mutação , Neovascularização Patológica , Valor Preditivo dos Testes , Ligante RANK/metabolismo , Receptor Ativador de Fator Nuclear kappa-B/metabolismo , Fatores de Transcrição/metabolismo , Resultado do Tratamento , Adulto Jovem
18.
Biomed Res Int ; 2015: 687635, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26097845

RESUMO

Mouse models that carry mutations causing thalassemia represent a suitable tool to test in vivo new mutation-specific therapeutic approaches. Transgenic mice carrying the ß-globin IVSI-6 mutation (the most frequent in Middle-Eastern regions and recurrent in Italy and Greece) are, at present, not available. We report the production and characterization of a transgenic mouse line (TG-ß-IVSI-6) carrying the IVSI-6 thalassemia point mutation within the human ß-globin gene. In the TG-ß-IVSI-6 mouse (a) the transgenic integration region is located in mouse chromosome 7; (b) the expression of the transgene is tissue specific; (c) as expected, normally spliced human ß-globin mRNA is produced, giving rise to ß-globin production and formation of a human-mouse tetrameric chimeric hemoglobin (mu) α-globin2/(hu) ß-globin2 and, more importantly, (d) the aberrant ß-globin-IVSI-6 RNAs are present in blood cells. The TG-ß-IVSI-6 mouse reproduces the molecular features of IVSI-6 ß-thalassemia and might be used as an in vivo model to characterize the effects of antisense oligodeoxynucleotides targeting the cryptic sites responsible for the generation of aberrantly spliced ß-globin RNA sequences, caused by the IVSI-6 mutation. These experiments are expected to be crucial for the development of a personalized therapy for ß-thalassemia.


Assuntos
Camundongos Transgênicos , Globinas beta/genética , Talassemia beta/genética , Animais , Sequência de Bases , Grécia , Hemoglobinas/genética , Humanos , Itália , Camundongos , Fenótipo , Mutação Puntual , Splicing de RNA , Talassemia beta/patologia
19.
Drug Metab Pers Ther ; 30(2): 121-8, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-26036226

RESUMO

Developments in "-omics" are creating a paradigm shift in laboratory medicine leading to personalized medicine. This allows the increase in diagnostics and therapeutics focused on individuals rather than populations. In order to investigate whether laboratory medicine is ready to play a key role in the integration of personalized medicine in routine health care and set the state-of-the-art knowledge about personalized medicine and laboratory medicine in Europe, a questionnaire was constructed under the auspices of the European Federation of Clinical Chemistry and Laboratory Medicine (EFLM) and the European Society of Pharmacogenomics and Personalised Therapy (ESPT). The answers of the participating laboratory medicine professionals indicate that they are aware that personalized medicine can represent a new and promising health model, and that laboratory medicine should play a key role in supporting the implementation of personalized medicine in the clinical setting. Participants think that the current organization of laboratory medicine needs additional/relevant implementations such as (i) new technological facilities in -omics; (ii) additional training for the current personnel focused on the new methodologies; (iii) incorporation in the laboratory of new competencies in data interpretation and counseling; and (iv) cooperation and collaboration among professionals of different disciplines to integrate information according to a personalized medicine approach.


Assuntos
Ciência de Laboratório Médico/educação , Medicina de Precisão , Centros Médicos Acadêmicos , Química Clínica/educação , Europa (Continente) , Instalações de Saúde/normas , Instalações de Saúde/provisão & distribuição , Humanos , Laboratórios Hospitalares/normas , Laboratórios Hospitalares/provisão & distribuição , Papel Profissional , Faculdades de Medicina , Sociedades Médicas , Inquéritos e Questionários , Ensino
20.
Clin Chem Lab Med ; 53(7): 981-8, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-25995323

RESUMO

Developments in "-omics" are creating a paradigm shift in laboratory medicine leading to personalized medicine. This allows the increase in diagnostics and therapeutics focused on individuals rather than populations. In order to investigate whether laboratory medicine is ready to play a key role in the integration of personalized medicine in routine health care and set the state-of-the-art knowledge about personalized medicine and laboratory medicine in Europe, a questionnaire was constructed under the auspices of the European Federation of Clinical Chemistry and Laboratory Medicine (EFLM) and the European Society of Pharmacogenomics and Personalised Therapy (ESPT). The answers of the participating laboratory medicine professionals indicate that they are aware that personalized medicine can represent a new and promising health model, and that laboratory medicine should play a key role in supporting the implementation of personalized medicine in the clinical setting. Participants think that the current organization of laboratory medicine needs additional/relevant implementations such as (i) new technological facilities in -omics; (ii) additional training for the current personnel focused on the new methodologies; (iii) incorporation in the laboratory of new competencies in data interpretation and counseling; and (iv) cooperation and collaboration among professionals of different disciplines to integrate information according to a personalized medicine approach.


Assuntos
Técnicas de Laboratório Clínico , Hospitais , Medicina de Precisão , Faculdades de Medicina , Inquéritos e Questionários , Educação Médica , Europa (Continente) , Humanos , Laboratórios/organização & administração , Sociedades Médicas
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