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1.
Int J Mol Sci ; 23(24)2022 Dec 10.
Artigo em Inglês | MEDLINE | ID: mdl-36555323

RESUMO

Breast cancer (BC) is the most common cancer diagnosed among women in the world, with an ever-increasing incidence rate. Due to the dynamic increase in the occurrence of risk factors, including obesity and related metabolic disorders, the search for new regulatory mechanisms is necessary. This will help a complete understanding of the pathogenesis of breast cancer. The review presents the mechanisms of obesity as a factor that increases the risk of developing breast cancer and that even initiates the cancer process in the female population. The mechanisms presented in the paper relate to the inflammatory process resulting from current or progressive obesity leading to cell metabolism disorders and disturbed hormonal metabolism. All these processes are widely regulated by the action of microRNAs (miRNAs), which may constitute potential biomarkers influencing the pathogenesis of breast cancer and may be a promising target of anti-cancer therapies.


Assuntos
Neoplasias da Mama , Doenças Metabólicas , MicroRNAs , Obesidade , Feminino , Humanos , Neoplasias da Mama/genética , Neoplasias da Mama/patologia , Regulação Neoplásica da Expressão Gênica , Doenças Metabólicas/genética , MicroRNAs/genética , Obesidade/complicações , Obesidade/genética , Obesidade/patologia , Fatores de Risco
2.
JTO Clin Res Rep ; 3(11): 100400, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-36275912

RESUMO

Introduction: Fucosyl-GM1 is a monosialoganglioside with limited expression in healthy tissues and high expression on SCLC cells. BMS-986012 is a nonfucosylated, first-in-class, fully human immunoglobulin G1 monoclonal antibody that binds to fucosyl-GM1. Methods: CA001-030 is a phase 1/2, first-in-human study of BMS-986012 as monotherapy or in combination with nivolumab for adults with relapsed or refractory SCLC. Safety is the primary end point. Additional end points include objective response rate, duration of response, progression-free survival, pharmacokinetics, and overall survival. Results: Patients (BMS-986012 monotherapy, n = 77; BMS-986012 + nivolumab, n = 29) were predominantly of male sex (58%), 63 years old (mean), current or past tobacco users (97%), and treated previously with first-line systemic therapy (99%). The most common treatment-related adverse event was pruritus (n = 95 [90%]). Grade 4 treatment-related adverse events were reported in 2% (n = 2) of patients. The objective response rate (95% confidence interval [CI]) was higher with BMS-986012 plus nivolumab (38% [20.7%-57.7%]) than with monotherapy (4% [0.8%-11.0%]). Median (95% CI) duration of response with BMS-986012 plus nivolumab was 26.4 (4.4-not reached) months. Progression-free survival (95% CI) at 24 weeks with monotherapy and BMS-986012 plus nivolumab was 12.2% (6.0%-20.7%) and 39.3% (21.7%-56.5%), respectively. The pharmacokinetics profile of monotherapy and BMS-986012 plus nivolumab suggested dose proportionality across the tested dose range. Median overall survival (95% CI) with monotherapy and BMS-986012 plus nivolumab was 5.4 (4.0-7.3) and 18.7 (8.2-37.3) months, respectively. Conclusions: BMS-986012 in combination with nivolumab represents a well-tolerated, potential new therapy for relapsed or refractory SCLC. BMS-986012 is currently being explored in combination with carboplatin, etoposide, and nivolumab as a first-line therapy in extensive-stage SCLC (NCT04702880).

3.
Vaccines (Basel) ; 8(4)2020 Oct 31.
Artigo em Inglês | MEDLINE | ID: mdl-33142718

RESUMO

Peripheral T cell lymphomas (PTCLs) are generally chemotherapy resistant and have a poor prognosis. The lack of targeted immunotherapeutic approaches for T cell malignancies results in part from potential risks associated with targeting broadly expressed T cell markers, namely T cell depletion and clinically significant immune compromise. The knowledge that the T cell receptor (TCR) ß chain in human α/ß TCRs are grouped into Vß families that can each be targeted by a monoclonal antibody can therefore be exploited for therapeutic purposes. Here, we develop a flexible approach for targeting TCR Vß families by engineering T cells to express a chimeric CD64 protein that acts as a high affinity immune receptor (IR). We found that CD64 IR-modified T cells can be redirected with precision to T cell targets expressing selected Vß families by combining CD64 IR-modified T cells with a monoclonal antibody directed toward a specific TCR Vß family in vitro and in vivo. These findings provide proof of concept that TCR Vß-family-specific T cell lysis can be achieved using this novel combination cell-antibody platform and illuminates a path toward high precision targeting of T cell malignancies without substantial immune compromise.

4.
Aging Ment Health ; 24(2): 280-290, 2020 02.
Artigo em Inglês | MEDLINE | ID: mdl-30520312

RESUMO

Objectives: The MEETINGDEM research project aimed to implement the combined Dutch Meeting Centre Support Programme (MCSP) for community-dwelling people with dementia and caregivers within Italy, Poland and UK and to assess whether comparable benefits were found in these countries as in the Netherlands.Method: Nine pilot Meeting Centres (MCs) participated (Italy-5, Poland-2, UK-2). Effectiveness of MCSP was compared to usual care (UC) on caregiver outcomes measuring competence (SSCQ), mental health (GHQ-12), emotional distress (NPI-Q) and loneliness (UCLA) analysed by ANCOVAs in a 6-month pre-test/post-test controlled trial. Interviews using standardised measures were completed with caregivers.Results: Pre/post data were collected for 93 caregivers receiving MCSP and 74 receiving UC. No statistically significant differences on the outcome measures were found overall. At a country level MC caregivers in Italy showed significant better general mental health (p = 0.04, d = 0.55) and less caregiver distress (p = 0.02, d = 0.62) at post-test than the UC group. Caregiver satisfaction was rated on a sample at 3 months (n = 81) and 6 months (n = 84). The majority of caregivers reported feeling less burdened and more supported by participating in MCSP.Conclusion: The moderate positive effect on sense of competence and the greater mental health benefit for lonely caregivers using the MCSP compared to UC as found in the original Dutch studies were not replicated. However, subject to study limitations, caregivers in Italy using MCSP benefitted more regarding their mental health and emotional distress than caregivers using UC. Further evaluation of the benefits of MCSP within these countries in larger study samples is recommended.


Assuntos
Adaptação Psicológica , Cuidadores/psicologia , Demência/reabilitação , Qualidade de Vida/psicologia , Apoio Social , Idoso , Continuidade da Assistência ao Paciente , Demência/psicologia , Feminino , Humanos , Vida Independente , Itália , Masculino , Polônia , Avaliação de Programas e Projetos de Saúde , Grupos de Autoajuda , Reino Unido
5.
Psychiatr Pol ; 53(5): 1053-1067, 2019 Oct 30.
Artigo em Inglês, Polonês | MEDLINE | ID: mdl-31955185

RESUMO

OBJECTIVES: New, effective biological interventions for treatment of depressive episodes and recurrent depression are still needed. Whole-body cryotherapy (WBC), which is a treatment using cryogenic temperature, is a novel therapeutic modality in neurology and rheumatology. The objective of this study was to determine the efficacy and safety of WBC as an add-on treatment for depressive episode. METHODS: 30 adults diagnosed with depressive episode were recruited to an observational, prospective study. 21 participants (17 women, 81%), mean age 46.1 (±16.7), completed the whole study procedure. The Hamilton Depression Rating Scale and the Beck Depression Inventory were used to assess the severity of depressive symptoms. Additionally, quality of life and anhedonia were assessed with the WHOQoL-BREF and the SHAPS. Participants undertook 10, 2-minute (from - 110 C to - 135 degrees C) WBC sessions within two weeks. RESULTS: Patients after WBC sessions showed significant improvement in the form of a reduction in total scores in scales assessing depressive symptoms: the HDRS (p< 0.00001) between T1 (16.94±4.3) and T4 (4.50±4.2) and the BDI-II (T1: 13.48±4.6; T4: 6.14±6.7, p<0.03), lower anhedonialevelon SHAPS (p =0.011) and higher quality of lifein thefollowing domains: physical health (p =0.024), psychological health (p =0.016) and environmental domain (p =0.003). Pre/post comparison of self-report well-being measured by the VAS scale showed a significant increase (p< 0.00001). It was shown that WBC have no effect on the level of cytokines, NO, hsCRP, ESR and TAS in blood (p> 0.05). CONCLUSIONS: WBC proved to be an effective, safe, and tolerable add-on intervention in patients with depressive episode. Further randomized controlled trials should be conducted.


Assuntos
Crioterapia/métodos , Transtorno Depressivo Maior/terapia , Exercício Físico , Qualidade de Vida/psicologia , Adulto , Anedonia , Temperatura Baixa , Transtorno Depressivo Maior/psicologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Resultado do Tratamento
7.
Mol Neurobiol ; 56(4): 2741-2759, 2019 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-30056576

RESUMO

Neuroligins (NLGNs) are cell adhesion molecules located on the postsynaptic side of the synapse that interact with their presynaptic partners neurexins to maintain trans-synaptic connection. Fragile X syndrome (FXS) is a common neurodevelopmental disease that often co-occurs with autism and is caused by the lack of fragile X mental retardation protein (FMRP) expression. To gain an insight into the molecular interactions between the autism-related genes, we sought to determine whether FMRP controls the synaptic levels of NLGNs. We show evidences that FMRP associates with Nlgn1, Nlgn2, and Nlgn3 mRNAs in vitro in both synaptoneurosomes and neuronal cultures. Next, we confirm local translation of Nlgn1, Nlgn2, and Nlgn3 mRNAs to be synaptically regulated by FMRP. As a consequence of elevated Nlgns mRNA translation Fmr1 KO mice exhibit increased incorporation of NLGN1 and NLGN3 into the postsynaptic membrane. Finally, we show that neuroligins synaptic level is precisely and dynamically regulated by their rapid proteolytic cleavage upon NMDA receptor stimulation in both wild type and Fmr1 KO mice. In aggregate, our study provides a novel approach to understand the molecular basis of FXS by linking the dysregulated synaptic expression of NLGNs with FMRP.


Assuntos
Moléculas de Adesão Celular Neuronais/metabolismo , Proteína do X Frágil da Deficiência Intelectual/metabolismo , Biossíntese de Proteínas , Proteólise , Sinapses/metabolismo , Animais , Moléculas de Adesão Celular Neuronais/genética , Membrana Celular/metabolismo , Células Cultivadas , Química Click , Reagentes de Ligações Cruzadas/metabolismo , Hipocampo/metabolismo , Masculino , Camundongos Knockout , Modelos Biológicos , Polirribossomos/metabolismo , Ligação Proteica , RNA Mensageiro/genética , RNA Mensageiro/metabolismo
8.
Folia Neuropathol ; 56(3): 167-174, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30509037

RESUMO

Tuberous sclerosis complex (TSC) represents a genetic condition, in which the clinical manifestations are caused by the disinhibition of the mammalian target of rapamycin (mTOR) pathway due to mutations in the TSC1 (hamartin) or TSC2 (tuberin) genes. The deregulated mTOR activity leads to multi-site tumors, including subependymal giant cell astrocytoma (SEGA). SEGA is a brain tumor that affects around 15% of TSC patients. The aim of the study was to evaluate miR-21 expression in the serum of two groups of TSC patients: with or without SEGA tumors. We found no differences in the level of miR-21 depending on the presence of SEGA. Next, we studied the influence of prolonged rapamycin administration on miR-21 level in the blood serum of TSC patients (6-12 months of rapamycin) and in primary cultures of SEGA-derived cells treated with rapamycin in vitro. Here we show that rapamycin treatment leads to the upregulation of miR-21 in both patients' serum and in primary SEGA tumor cells in the culture indicating the regulatory relationship between rapamycin treatment and miR-21 expression.


Assuntos
Antibióticos Antineoplásicos/uso terapêutico , MicroRNAs/biossíntese , MicroRNAs/efeitos dos fármacos , Sirolimo/uso terapêutico , Esclerose Tuberosa/tratamento farmacológico , Adolescente , Astrocitoma/etiologia , Criança , Feminino , Humanos , Masculino , Esclerose Tuberosa/complicações , Esclerose Tuberosa/metabolismo , Células Tumorais Cultivadas , Regulação para Cima , Adulto Jovem
9.
Clin Interv Aging ; 13: 787-795, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29731618

RESUMO

PURPOSE: The purpose of this study was to determine the validity and reliability of the Polish version of the Questionnaire for Health-Related Resource Use in an Elderly Population [Fragebogen zur Inanspruchnahme medizinischer und nicht-medizinischer Versorgungsleistungen im Alter (FIMA)]. PATIENTS AND METHODS: This was a cross-sectional study conducted in a rehabilitation care unit in Poland between January and June of 2017. Sixty-one patients aged ≥65 years who had been admitted to the unit were enrolled into the study. Each participant was evaluated twice: once within 48 hours of admission (T1) and once after 2 weeks (T2). RESULTS: The translated instrument was understood by most respondents in a selected population and it maintained a reading and comprehension level that was accessible by most respondents, even of a low education level. With the aid of the prevalence-adjusted bias-adjusted kappa (PABAK) and intraclass correlation coefficient (ICC), 100% test-retest reliability for 10 out of the 12 questions that were subjected to analysis was indicated. The most frequent health-related resource uses were appointments at the general practitioner (90.2%) and orthopedist (54.1%), medication (93.4%), and the necessity to have glasses as supportive equipment (70.5%). CONCLUSION: The Polish FIMA demonstrated very good test-retest reliability, good validity, and ease of use for elderly people. Further investigation is required. In the future, the routine use of this instrument could be encouraged to assess the use and demand for medical and nonmedical services among the elderly.


Assuntos
Tomada de Decisões , Avaliação Geriátrica/métodos , Recursos em Saúde/estatística & dados numéricos , Inquéritos Epidemiológicos , Psicometria/métodos , Garantia da Qualidade dos Cuidados de Saúde , Inquéritos e Questionários , Idoso , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Polônia , Reprodutibilidade dos Testes , Traduções
10.
Int J Geriatr Psychiatry ; 33(7): 883-892, 2018 07.
Artigo em Inglês | MEDLINE | ID: mdl-29513909

RESUMO

OBJECTIVES: MEETINGDEM investigated whether the Dutch Meeting Centres Support Programme (MCSP) could be implemented in Italy, Poland, and the UK with comparable benefits. This paper reports on the impact on people living with dementia attending pilot Meeting Centres in the 3 countries. METHODS: Nine pilot Meeting Centres (MCs) participated (Italy-5, Poland-2, UK-2). Effectiveness of MCSP was compared with Usual Care (UC) on outcomes measuring behavioural and psychological symptoms (NPI), depression (CSDD), and quality of life (DQoL, QOL-AD), analysed by ANCOVAs in a 6-month pre-test/post-test controlled trial. RESULTS: Pre/post data were collected for 85 people with dementia and 93 carers (MCSP) and 74 people with dementia /carer dyads' receiving UC. MCSP showed significant positive effects for DQoL [Self-esteem (F = 4.8, P = 0.03); Positive Affect (F = 14.93, P < 0.00); Feelings of Belonging (F = 7.77, P = 0.01)] with medium and large effect sizes. Higher attendance levels correlated with greater neuropsychiatric symptom reduction (rho = 0.24, P = 0.03) and a greater increase in feelings of support (rho = 0.36, P = 0.001). CONCLUSIONS: MCSPs showed significant wellbeing and health benefits compared with UC, building on the evidence of effectiveness from the Netherlands. In addition to the previously reported successful implementation of MCSP in Italy, Poland, and the UK, these findings suggest that further international dissemination of MCSP is recommended.


Assuntos
Centros Comunitários de Saúde/organização & administração , Demência/terapia , Transtornos Mentais/epidemiologia , Idoso , Idoso de 80 Anos ou mais , Demência/psicologia , Transtorno Depressivo/epidemiologia , Feminino , Humanos , Itália/epidemiologia , Masculino , Pessoa de Meia-Idade , Polônia/epidemiologia , Qualidade de Vida , Reino Unido/epidemiologia
11.
Int Psychogeriatr ; 30(11): 1717-1734, 2018 11.
Artigo em Inglês | MEDLINE | ID: mdl-29436322

RESUMO

ABSTRACTBackground:The "pathway to care" concept offers a helpful framework for preparing national dementia plans and strategies and provides a structure to explore the availability and accessibility of timely and effective care for people with dementia and support for their informal carers. Within the framework of the JPND-MEETINGDEM implementation project the pathways to regular day-care activities and the Meeting Centers Support Programme (MCSP), an innovative combined support form for people with dementia and carers, was explored. METHODS: An exploratory, descriptive, qualitative, cross-country design was applied to investigate the pathways to day care in several regions in four European countries (Italy, Poland, United Kingdom, and the Netherlands). RESULTS: Before implementation of MCSP, of the four countries the United Kingdom had the most structured pathway to post-diagnostic support for people with dementia. MCSP introduction had a positive impact on the pathways to day-care activities in all countries. MCSP filled an important gap in post-diagnostic care, increasing the accessibility to support for both people with dementia and carers. Key elements such as program of activities, target group, and collaboration between healthcare and social services were recognized as success factors. CONCLUSIONS: This study shows that MCSP fills (part of) the gap between diagnosis and residential care and can therefore be seen as a pillar of post-diagnostic care and support. Further dissemination of Meeting Centers in Europe may have a multiple impact on the structure of dementia services in European countries and the pathways to day care for people with dementia and their carer(s).


Assuntos
Cuidadores/psicologia , Centros Comunitários de Saúde/organização & administração , Continuidade da Assistência ao Paciente/organização & administração , Hospital Dia , Qualidade de Vida , Apoio Social , Idoso , Idoso de 80 Anos ou mais , Demência/psicologia , Demência/terapia , Feminino , Humanos , Itália , Masculino , Pessoa de Meia-Idade , Países Baixos , Avaliação de Resultados em Cuidados de Saúde , Polônia , Pesquisa Qualitativa , Reino Unido
12.
Med Pr ; 67(4): 455-66, 2016.
Artigo em Polonês | MEDLINE | ID: mdl-27623827

RESUMO

BACKGROUND: Fast progress in a lot of economic sectors has greatly contributed to a growing role of road transportation systems, including freight transport and passenger transport. The job of professional drivers is regarded as extremely hard and dangerous, it is associated with high risk of health loss and even life loss. This profession is also associated with mental burden, the main cause of the absence at work and alarming number of road accidents. The aim of study was to compare exposure to stress, check the level of stress and ways to cope with stress in 2 groups of drivers (N = 187). MATERIAL AND METHODS: The study was carried out among public transport drivers and freight transport drivers. The authors' own questionnaire and 2 psychological tests: Perceived Stress Scale (PSS-10) and Posttraumatic Growth Inventory and Inventory to Measure Coping Strategies with Stress (Mini-COPE) were used as the study tools. RESULTS: The level of stress is high in both groups, mostly due to a similar type of work. Both groups practice similar ways to cope with stress, but active ways predominate. CONCLUSIONS: The work of a professional driver is considered as extremely stressful. The level of stress among professional drivers should be under continuous control. Employers should introduce preventive programs and educate employees about some professional ways to cope with stress. Med Pr 2016;67(4):455-466.


Assuntos
Acidentes de Trabalho/prevenção & controle , Adaptação Psicológica , Condução de Veículo/psicologia , Autocontrole/psicologia , Estresse Psicológico/prevenção & controle , Humanos , Veículos Automotores , Gestão da Segurança
13.
Cancer Immunol Res ; 3(10): 1130-7, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-26112923

RESUMO

Adoptive transfer of T cells engineered to express chimeric immunoreceptors is an effective strategy to treat hematologic cancers; however, the use of this type of therapy for solid cancers, such as ovarian cancer, remains challenging because a safe and effective immunotherapeutic target has not yet been identified. Here, we constructed and evaluated a novel redirected T-cell-based immunotherapy targeting human follicle-stimulating hormone receptor (FSHR), a highly conserved molecule in vertebrate animals with expression limited to gonadal tissues, ovarian cancer, and cancer-associated vasculature. Receptor ligand-based anti-FSHR immunoreceptors were constructed that contained small binding fragments from the ligand for FSHR, FSH, fused to T-cell transmembrane and T-cell signaling domains. Human T cells transduced to express anti-FSHR immunoreceptors were specifically immunoreactive against FSHR-expressing human and mouse ovarian cancer cell lines in an MHC-nonrestricted manner and mediated effective lysis of FHSR-expressing tumor cells, but not FSHR-deficient targets, in vitro. Similarly, the outgrowth of human ovarian cancer xenografts in immunodeficient mice was significantly inhibited by the adoptive transfer of FSHR-redirected T cells. Our experimental observations show that FSHR is a promising immunotherapeutic target for ovarian cancer and support further exploration of FSHR-targeted immune therapy approaches for patients with cancer.


Assuntos
Imunoterapia Adotiva , Neoplasias/genética , Neoplasias/imunologia , Receptores do FSH/genética , Linfócitos T/imunologia , Linfócitos T/metabolismo , Animais , Antígenos de Neoplasias/genética , Antígenos de Neoplasias/imunologia , Linhagem Celular , Citotoxicidade Imunológica , Modelos Animais de Doenças , Feminino , Expressão Gênica , Ordem dos Genes , Vetores Genéticos/genética , Humanos , Imunoterapia Adotiva/métodos , Camundongos , Neoplasias/terapia , Neoplasias Ovarianas/genética , Neoplasias Ovarianas/imunologia , Neoplasias Ovarianas/patologia , Neoplasias Ovarianas/terapia , Receptores do FSH/imunologia , Proteínas Recombinantes de Fusão/genética , Proteínas Recombinantes de Fusão/imunologia , Especificidade do Receptor de Antígeno de Linfócitos T/imunologia , Carga Tumoral , Ensaios Antitumorais Modelo de Xenoenxerto
15.
J Transl Med ; 12: 347, 2014 Dec 13.
Artigo em Inglês | MEDLINE | ID: mdl-25496493

RESUMO

BACKGROUND: Redirection of T lymphocytes against tumor antigens can induce dramatic regression of advanced stage malignancy. The use of bispecific antibodies (BsAbs) that bind both the T-cell receptor (TCR) and a target antigen is one promising approach to T-cell redirection. However, BsAbs indiscriminately bind all CD3+ T-cells and trigger TCR activation in the absence of parallel costimulatory signals required to overcome T-cell unresponsiveness or anergy. METHODS: To address these limitations, a combination platform was designed wherein a unique BsAb referred to as frBsAb exclusively engages T-cells engineered to express a novel chimeric receptor comprised of extracellular folate receptor fused to intracellular TCR and CD28 costimulatory signaling domains in tandem; a BsAb-binding immune receptor (BsAb-IR). As a surrogate TCR, the BsAb-IR allows for concomitant TCR and costimulatory signaling exclusively in transduced T-cells upon engagement with specific frBsAbs, and can therefore redirect T-cells on command to desired antigen. Human primary T-cells were transduced with lentiviral vector and expanded for 14-18 days. BsAb-IRs were harvested and armed with frBsAbs to test for redirected cytotoxicity against CD20 positive cancer cell lines. RESULTS: Using frBsAbs specific for CD20 or HER2, the lytic activity of primary human T-cells expressing the BsAb-IR was specifically redirected against CD20+ leukemic cells or HER2+ epithelial cancer cells, respectively, while non-engineered T-cells were not activated. Notably, elimination of the CD28 costimulatory domain from the BsAb-IR construct significantly reduced frBsAb-redirected antitumor responses, confirming that frBsAbs are capable of delivering simultaneous TCR activation and costimulatory signals to BsAb-IR T-cells. CONCLUSION: In summary, our results establish the proof of concept that the combination of BsAbs with optimized gene-engineered T-cells provides the opportunity to specify and augment tumor antigen-specific T-cell activation and may improve upon the early success of conventional BsAbs in cancer immunotherapy.


Assuntos
Anticorpos Biespecíficos/uso terapêutico , Engenharia Genética , Imunoterapia , Neoplasias/terapia , Linfócitos T/imunologia , Linhagem Celular , Humanos
16.
Folia Microbiol (Praha) ; 58(1): 47-52, 2013 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-22711180

RESUMO

Many serious diseases caused by Staphylococcus aureus appear to be associated with biofilms. Therefore, we investigated the biofilm-forming ability of the methicillin-resistant S. aureus (MRSA) isolates collected from hospitalized patients. As many as 96 % strains had the ability to form biofilm in vitro. The majority of S. aureus strains formed biofilm in ica-dependent mechanism. However, 23 % of MRSA isolates formed biofilm in ica-independent mechanism. Half of these strains carried fnbB genes encoding surface proteins fibronectin-binding protein B involved in intercellular accumulation and biofilm development in S. aureus strains. The biofilm structures were examined via confocal laser scanning microscopy (CLSM) and three-dimensional structures were reconstructed. The images obtained in CLSM revealed that the biofilm created by ica-positive strains was different from biofilm formed by ica-negative strains. The MRSA population showed a large genetic diversity and we did not find a single clone that occurred preferentially in hospital environment. Our results demonstrated the variation in genes encoding adhesins for the host matrix proteins (elastin, laminin, collagen, fibronectin, and fibrinogen) and in the gene involved in biofilm formation (icaA) within the majority of S. aureus clones.


Assuntos
Biofilmes , Staphylococcus aureus Resistente à Meticilina/fisiologia , Humanos , Staphylococcus aureus Resistente à Meticilina/genética , Microscopia Confocal
17.
Oncoimmunology ; 1(5): 777-779, 2012 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-22934280

RESUMO

Chimeric antigen receptors (CARs) possess fixed specificity for a single antigen and require empirical testing in T cells. To address this, we have developed a novel, adaptable immune receptor strategy that allows for the rapid generation and testing of T cells of nearly infinite antigen specificity.

18.
Cell Cycle ; 11(14): 2660-71, 2012 Jul 15.
Artigo em Inglês | MEDLINE | ID: mdl-22732497

RESUMO

Anti-neoplastic potential of calorie restriction or ligand-induced activation of peroxisome proliferator activated receptors (PPARs) has been demonstrated in multiple studies; however, mechanism(s) by which tumor cells respond to these stimuli remain to be elucidated. One of the potent agonists of PPARα, fenofibrate, is a commonly used lipid-lowering drug with low systemic toxicity. Fenofibrate-induced PPARα transcriptional activity is expected to shift energy metabolism from glycolysis to fatty acid ß-oxidation, which in the long-term, could target weak metabolic points of glycolysis-dependent glioblastoma cells. The results of this study demonstrate that 25 µM fenofibrate can effectively repress malignant growth of primary glial tumor cells and glioblastoma cell lines. This cytostatic action involves G(1) arrest accompanied by only a marginal level of apoptotic cell death. Although the cells treated with 25 µM fenofibrate remain arrested, the cells treated with 50 µM fenofibrate undergo massive apoptosis, which starts after 72 h of the treatment. This delayed apoptotic event was preceded by FoxO3A nuclear accumulation, FoxO3A phosphorylation on serine residue 413, its elevated transcriptional activity and expression of FoxO-dependent apoptotic protein, Bim. siRNA-mediated inhibition of FoxO3A attenuated fenofibrate-induced apoptosis, indicating a direct involvement of this transcription factor in the fenofibrate action against glioblastoma. These properties of fenofibrate, coupled with its low systemic toxicity, make it a good candidate in support of conventional therapies against glial tumors.


Assuntos
Proteínas Reguladoras de Apoptose/metabolismo , Apoptose/efeitos dos fármacos , Fenofibrato/toxicidade , Fatores de Transcrição Forkhead/metabolismo , Hipolipemiantes/toxicidade , Proteínas de Membrana/metabolismo , Proteínas Proto-Oncogênicas/metabolismo , Proteína 11 Semelhante a Bcl-2 , Linhagem Celular Tumoral , Nucléolo Celular/metabolismo , Metabolismo Energético , Proteína Forkhead Box O3 , Fatores de Transcrição Forkhead/antagonistas & inibidores , Fatores de Transcrição Forkhead/genética , Pontos de Checagem da Fase G1 do Ciclo Celular/efeitos dos fármacos , Glioblastoma/metabolismo , Glioblastoma/patologia , Humanos , PPAR gama/agonistas , PPAR gama/metabolismo , Fosforilação , Interferência de RNA , RNA Interferente Pequeno/metabolismo
19.
Cancer Res ; 72(7): 1844-52, 2012 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-22315351

RESUMO

Adoptive immunotherapies composed of T cells engineered to express a chimeric antigen receptor (CAR) offer an attractive strategy for treatment of human cancer. However, CARs have a fixed antigen specificity such that only one tumor-associated antigen (TAA) can be targeted, limiting the efficacy that can be achieved because of heterogeneous TAA expression. For this reason, a more generalized and effective application of CAR therapy would benefit from the capability to produce large panels of CARs against many known TAAs. In this study, we show a novel strategy to extend the recognition specificity potential of a bioengineered lymphocyte population, allowing flexible approaches to redirect T cells against various TAAs. Our strategy employs a biotin-binding immune receptor (BBIR) composed of an extracellular-modified avidin linked to an intracellular T-cell signaling domain. BBIR T cells recognized and bound exclusively to cancer cells pretargeted with specific biotinylated molecules. The versatility afforded by BBIRs permitted sequential or simultaneous targeting of a combination of distinct antigens. Together, our findings show that a platform of universal T-cell specificity can significantly extend conventional CAR approaches, permitting the tailored generation of T cells of unlimited antigen specificity for improving the effectiveness of adoptive T-cell immunotherapies for cancer.


Assuntos
Antígenos de Neoplasias/imunologia , Imunoterapia Adotiva , Neoplasias/terapia , Receptores de Antígenos de Linfócitos T/imunologia , Animais , Antígenos de Neoplasias/fisiologia , Biotinilação , Moléculas de Adesão Celular/fisiologia , Linhagem Celular , Molécula de Adesão da Célula Epitelial , Epitopos , Feminino , Engenharia Genética , Humanos , Interferon gama/biossíntese , Camundongos , Neoplasias/imunologia , Linfócitos T/fisiologia
20.
J Neurosci Res ; 89(2): 183-98, 2011 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-21162126

RESUMO

In HIV patients, antiretroviral medications trigger metabolic abnormalities, including insulin resistance. In addition, the inflammatory cytokine tumor necrosis factor-α (TNFα), which is elevated in human immunodeficiency virus encephalitis (HIVE), also induces insulin resistance and inflicts neuronal damage in vitro. In differentiated PC12 cells and rat cortical neurons, high glucose (HG; 25 mM) triggers reactive oxygen species (ROS) accumulation, contributing to the retraction of neuronal processes, with only a minimal involvement of neuronal apoptosis. In the presence of TNFα, HG-treated neurons undergo massive apoptosis. Because mammalian homolog of the Forkhead family of transcription factors, Forkhead box O transcription factor 3a (FOXO3a), controls ROS metabolism, we asked whether FOXO3a could affect the fate of differentiated neurons in the paradigm of HIVE. We observed FOXO3a nuclear translocation in HG-treated neuronal cultures, accompanied by partial loss of mitochondrial potential and gradual retraction of neuronal processes. Addition of TNFα to HG-treated neurons increased expression of the FOXO-dependent proapoptotic gene Bim, which resulted in extensive apoptotic death. Insulin-like growth factor-I (IGF-I) significantly lowered intracellular ROS, which was accompanied by IGF-I-mediated FOXO3a nuclear export and decrease in its transcriptional activity. The clinical relevance of these findings is supported by detection of nuclear FOXO3a in TUNEL-positive cortical neurons from HIVE, especially in brain areas characterized by elevated TNFα.


Assuntos
Complexo AIDS Demência/metabolismo , Fatores de Transcrição Forkhead/metabolismo , Resistência à Insulina/fisiologia , Fator de Crescimento Insulin-Like I/metabolismo , Neurônios/metabolismo , Fator de Necrose Tumoral alfa/metabolismo , Animais , Apoptose/fisiologia , Proteínas Reguladoras de Apoptose/metabolismo , Proteína 11 Semelhante a Bcl-2 , Western Blotting , Imunofluorescência , Proteína Forkhead Box O3 , Glucose/metabolismo , Marcação In Situ das Extremidades Cortadas , Potencial da Membrana Mitocondrial/fisiologia , Proteínas de Membrana/metabolismo , Neurônios/patologia , Células PC12 , Proteínas Proto-Oncogênicas/metabolismo , Ratos , Ratos Sprague-Dawley , Espécies Reativas de Oxigênio/metabolismo , Reação em Cadeia da Polimerase Via Transcriptase Reversa
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