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1.
Ann Oncol ; 26(6): 1091-1101, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-25403592

RESUMO

BACKGROUND: Frailty is a state of vulnerability to poor resolution of homeostasis following a stressor event, such as chemotherapy or cancer surgery. Better knowledge of the epidemiology of frailty could help drive a global cancer care strategy for older people. The aim of this review was to establish the prevalence and outcomes of frailty and pre-frailty in older cancer patients. METHODS: Observational studies that reported data on the prevalence and/or outcomes of frailty in older cancer patients with any stage of solid or haematological malignancy were considered. We searched Medline, CINAHL, Cochrane Library, EMBASE, Web of Science, Allied and Complementary medicine, Psychinfo and ProQuest (1 January 1996 to 30 June 2013). The primary outcomes were prevalence of frailty, treatment-related side-effects, unplanned hospitalization and mortality. Risk of bias was assessed using the Newcastle-Ottawa checklist. RESULTS: Data from 20 studies evaluating 2916 participants are included. The median reported prevalence of frailty and pre-frailty was 42% (range 6%-86%) and 43% (range 13%-79%), respectively. A median of 32% (range 11%-78%) of patients were classified as fit. Frailty was independently associated with increased all-cause mortality [adjusted 5-year hazard ratio (HR) 1.87, 95% confidence interval (CI) 1.36-2.57]. There was evidence of increased risk of postoperative mortality for both frailty (adjusted 30-day HR 2.67, 95% CI 1.08-6.62) and pre-frailty (adjusted HR 2.33, 95% CI 1.20-4.52). Treatment complications were more frequent in those with frailty, including intolerance to cancer treatment (adjusted odds ratio 4.86, 95% CI 2.19-10.78) and postoperative complications (adjusted 30-day HR 3.19, 95% CI 1.68-6.04). CONCLUSIONS: More than half of older cancer patients have pre-frailty or frailty and these patients are at increased risk of chemotherapy intolerance, postoperative complications and mortality. The findings of this review support routine assessment of frailty in older cancer patients to guide treatment decisions, and the development of multidisciplinary geriatric oncology services.


Assuntos
Antineoplásicos/uso terapêutico , Idoso Fragilizado , Neoplasias/epidemiologia , Neoplasias/terapia , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Antineoplásicos/efeitos adversos , Comorbidade , Feminino , Avaliação Geriátrica , Humanos , Masculino , Neoplasias/diagnóstico , Neoplasias/mortalidade , Razão de Chances , Complicações Pós-Operatórias/epidemiologia , Valor Preditivo dos Testes , Prevalência , Fatores de Risco , Resultado do Tratamento
2.
Br J Cancer ; 108(5): 1133-42, 2013 Mar 19.
Artigo em Inglês | MEDLINE | ID: mdl-23449350

RESUMO

BACKGROUND: Clear cell renal cancer frequently harbours von Hippel-Lindau (VHL) gene mutations, leading to stabilisation of the hypoxia-inducible factors (HIFs) and expression of their target genes. We investigated HIF-1 and HIF-2 in the regulation of microRNA-210 (miR-210), and its clinical relevance in renal tumours. METHODS: RCC4 and 786-O renal cancer cell lines transfected with either an empty vector or functional VHL and incubated in normoxia or hypoxia were examined for miR-210 expression. Hypoxia-inducible factor siRNAs were used to examine their regulation of miR-210. Seventy-one clear cell renal tumours were sequenced for VHL mutations. Expression of miR-210, VHL, CA9, ISCU and Ki-67 were determined by immunohistochemistry and qRT-PCR. RESULTS: In addition to HIF-1 regulating miR-210 in renal cancer, HIF-2 can regulate this microRNA in the absence of HIF-1. MicroRNA-210 is upregulated in renal cancer compared with normal renal cortex tissue. MicroRNA-210 correlates negatively with its gene target ISCU at the protein and mRNA level. MicroRNA-210 correlated with positive outcome variables and negatively with Ki-67. CONCLUSION: We provide further evidence of miR-210 activity in vivo, and show that high miR-210 expression is associated with better clinico-pathological prognostic factors.


Assuntos
Fatores de Transcrição Hélice-Alça-Hélice Básicos/metabolismo , Carcinoma de Células Renais/genética , Regulação Neoplásica da Expressão Gênica , Fator 1 Induzível por Hipóxia/metabolismo , Proteínas Ferro-Enxofre/metabolismo , Neoplasias Renais/genética , MicroRNAs/genética , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma de Células Renais/metabolismo , Linhagem Celular Tumoral , Feminino , Humanos , Neoplasias Renais/metabolismo , Masculino , Pessoa de Meia-Idade , Mutação , Prognóstico , Regulação para Cima , Proteína Supressora de Tumor Von Hippel-Lindau/genética
3.
Br J Cancer ; 107(7): 1131-7, 2012 Sep 25.
Artigo em Inglês | MEDLINE | ID: mdl-22918393

RESUMO

BACKGROUND: Objectively measured circulating biomarkers of prognosis complementing existing clinicopathological models are needed in renal cell carcinoma (RCC). METHODS: Blood samples collected from 216 RCC patients in Leeds before nephrectomy (median follow-up 7 years) were analysed for C-reactive protein (CRP), osteopontin (OPN) and carbonic anhydrase IX (CA9) and prognostic significance determined. RESULTS: CA9, OPN and CRP were univariately prognostic for overall survival (OS), cancer-specific survival (CSS) and disease-free survival (DFS) with CRP and CA9 being independently prognostic for OS/CSS and OS, respectively. Including CA9, OPN and CRP with other conventional prognostic factors gave a superior predictive capacity when compared with a previously published pre-operative clinical nomogram (Karakiewicz et al, 2009). Osteopontin outperformed this nomogram and the post-operative SSIGN score for OS but not for CSS, being significantly predictive for non-cancer deaths. Osteopontin, CRP and CA9 outperformed stage (c-index 76% compared with 70% for stage) and OPN or CA9 identified several subsets of poor prognosis patients including in T1 patients, who may benefit from adjuvant therapy and increased surveillance. CONCLUSION: Circulating CA9, OPN and CRP add value to existing clinicopathological prognostic factors/models and support further studies to investigate their potential use in improving the clinical management of RCC.


Assuntos
Biomarcadores Tumorais/sangue , Proteína C-Reativa/metabolismo , Anidrase Carbônica IV/sangue , Carcinoma de Células Renais/sangue , Neoplasias Renais/sangue , Osteopontina/sangue , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma de Células Renais/enzimologia , Intervalo Livre de Doença , Feminino , Seguimentos , Humanos , Neoplasias Renais/enzimologia , Masculino , Pessoa de Meia-Idade , Nefrectomia/métodos , Prognóstico
4.
Gene Ther ; 17(8): 1000-10, 2010 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-20410926

RESUMO

We have assessed the ability of bispecific fusion proteins to improve adenovirus-mediated transfer of therapeutic and marker transgenes. We constructed an expression vector that can be easily modified to synthesize a variety of fusion proteins for retargeting adenoviral gene therapy vectors to cell surface markers, which are differentially expressed between normal and cancer cells. Adenoviral transduction can be improved in a number of tumour cell lines which overexpress EGFR (epidermal growth factor receptor) or uPAR (urokinase-type plasminogen activator receptor), but which have only low levels of endogenous hCAR (human coxsackie B and adenovirus receptor) expression. Up to 40-fold improvement in beta-galactosidase transgene expression was seen using an EGFR retargeting protein, and up to 16-fold using a second fusion protein targeting uPAR. In vitro, our uPAR retargeting fusion protein improved the sensitivity to adenoviral herpes simplex virus thymidine kinase/ganciclovir by an order of magnitude, whereas in vivo, our EGFR retargeting protein is able to significantly delay tumour growth in rodent animal models in a dose-dependent manner. The 'cassette' design of our fusion protein constructs offers a flexible method for the straightforward synthesis of multiple adenoviral retargeting proteins, directed against a variety of tumour-associated antigens, for use in clinical trials.


Assuntos
Adenoviridae/genética , Receptores ErbB/genética , Terapia Genética/métodos , Neoplasias/terapia , Receptores de Ativador de Plasminogênio Tipo Uroquinase/genética , Antivirais/farmacologia , Linhagem Celular Tumoral , Receptor Constitutivo de Androstano , Resistencia a Medicamentos Antineoplásicos/genética , Receptores ErbB/metabolismo , Ganciclovir/farmacologia , Técnicas de Transferência de Genes , Vetores Genéticos , Humanos , Proteínas de Membrana/genética , Engenharia de Proteínas , Receptores Citoplasmáticos e Nucleares/genética , Receptores Citoplasmáticos e Nucleares/metabolismo , Receptores de Ativador de Plasminogênio Tipo Uroquinase/metabolismo , Proteínas Recombinantes de Fusão/análise , Transdução Genética
5.
Br J Cancer ; 103(1): 101-11, 2010 Jun 29.
Artigo em Inglês | MEDLINE | ID: mdl-20531413

RESUMO

BACKGROUND: In renal cell carcinoma (RCC), the discovery of biomarkers for clinical use is a priority. This study aimed to identify and validate diagnostic and prognostic serum markers using proteomic profiling. METHODS: Pre-operative sera from 119 patients with clear cell RCC and 69 healthy controls was analysed by surface-enhanced laser desorption/ionisation time-of-flight mass spectrometry with stringent in-house quality control and analysis routines. Following identification of one prognostic peak as a fragment of serum amyloid A (SAA), total serum SAA and CRP were also determined by immunoassay for further validation. RESULTS: Several peptides were identified as having independent prognostic but not diagnostic significance on multivariable analysis. One was subsequently identified as a 1525 Da fragment of SAA (hazard ratio (HR)=0.26, 95% CI 0.08-0.85, P=0.026). This was weakly negatively correlated with total SAA, which was also of independent prognostic significance (HR=2.46, 95% CI 1.17-5.15, P=0.017). Both potentially strengthened prognostic models based solely on pre-operative variables. CONCLUSIONS: This is the first description of the prognostic value of this peptide in RCC and demonstrates proof of principle of the approach. The subsequent examination of SAA protein considerably extends previous studies, being the first study to focus solely on pre-operative samples and describing potential clinical utility in pre-operative prognostic models.


Assuntos
Carcinoma de Células Renais/sangue , Carcinoma de Células Renais/mortalidade , Neoplasias Renais/sangue , Neoplasias Renais/mortalidade , Fragmentos de Peptídeos/sangue , Proteína Amiloide A Sérica/análise , Adulto , Idoso , Idoso de 80 Anos ou mais , Intervalo Livre de Doença , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Prognóstico , Espectrometria de Massas por Ionização e Dessorção a Laser Assistida por Matriz , Taxa de Sobrevida
6.
Br J Cancer ; 103(11): 1649-56, 2010 Nov 23.
Artigo em Inglês | MEDLINE | ID: mdl-21063409

RESUMO

BACKGROUND: Validated objective biomarkers are needed for patients with renal cell carcinoma (RCC) to guide patient management and define high-risk populations for follow-up or for therapeutic purposes. METHODS: Patients undergoing nephrectomy for RCC (n=286 all stages, 84% with conventional clear cell type) were included with a median duration follow-up of 5 years. The prognostic significance of pre-operative haematological and biochemical variables, including C-reactive protein (CRP) values were examined and whether they added additional information to a recently published pre-operative scoring system was determined. RESULTS: C-reactive protein was the most significant predictor of overall survival (OS; χ(2)=50.9, P<0.001). Five-year OS for patients with CRP ≤ 15 mg l(-1) vs >15 mg l(-1) was 72% (95% CI 65-78%) and 33% (95% CI 23-44%), respectively. Similar results were seen for cancer-specific survival (CSS) and disease-free survival. On multivariate analysis, CRP remained highly significant for CSS (χ(2)=17.3, P<0.0001) and OS (χ(2)=9.8, P<0.002), in addition to other pre-operative variables including log of neutrophil/lymphocyte ratio, red blood cell count and white cell count. C-reactive protein was significant in addition to the pre-operative nomogram score (χ(2)=12.5, P=0.0004 for OS, χ(2)=16.2, P=0.0001 for CSS and χ(2)=8.6, P=0.003 for DFS) and was still significant when other pre-operative variables were included. CONCLUSION: C-reactive protein and other haematological and biochemical variables have independent prognostic significance in RCC and may enhance pre-operative scoring systems.


Assuntos
Proteína C-Reativa/análise , Carcinoma de Células Renais/mortalidade , Neoplasias Renais/mortalidade , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma de Células Renais/sangue , Feminino , Humanos , Neoplasias Renais/sangue , Masculino , Pessoa de Meia-Idade , Prognóstico , Modelos de Riscos Proporcionais
7.
Gene Ther ; 16(5): 689-99, 2009 May.
Artigo em Inglês | MEDLINE | ID: mdl-19282847

RESUMO

Reovirus is a naturally occurring oncolytic virus currently in early clinical trials. However, the rapid induction of neutralizing antibodies represents a major obstacle to successful systemic delivery. This study addresses, for the first time, the ability of cellular carriers in the form of T cells and dendritic cells (DC) to protect reovirus from systemic neutralization. In addition, the ability of these cellular carriers to manipulate the subsequent balance of anti-viral versus anti-tumour immune response is explored. Reovirus, either neat or loaded onto DC or T cells, was delivered intravenously into reovirus-naive or reovirus-immune C57Bl/6 mice bearing lymph node B16tk melanoma metastases. Three and 10 days after treatment, reovirus delivery, carrier cell trafficking, metastatic clearance and priming of anti-tumour/anti-viral immunity were assessed. In naive mice, reovirus delivered either neat or through cell carriage was detectable in the tumour-draining lymph nodes 3 days after treatment, though complete clearance of metastases was only obtained when the virus was delivered on T cells or mature DC (mDC); neat reovirus or loaded immature DC (iDC) gave only partial early tumour clearance. Furthermore, only T cells carrying reovirus generated anti-tumour immune responses and long-term tumour clearance; reovirus-loaded DC, in contrast, generated only an anti-viral immune response. In reovirus-immune mice, however, the results were different. Neat reovirus was completely ineffective as a therapy, whereas mDC--though not iDC--as well as T cells, effectively delivered reovirus to melanoma in vivo for therapy and anti-tumour immune priming. Moreover, mDC were more effective than T cells over a range of viral loads. These data show that systemically administered neat reovirus is not optimal for therapy, and that DC may be an appropriate vehicle for carriage of significant levels of reovirus to tumours. The pre-existing immune status against the virus is critical in determining the balance between anti-viral and anti-tumour immunity elicited when reovirus is delivered by cell carriage, and the viral dose and mode of delivery, as well as the immune status of patients, may profoundly affect the success of any clinical anti-tumour viral therapy. These findings are therefore of direct translational relevance for the future design of clinical trials.


Assuntos
Células Dendríticas/transplante , Melanoma Experimental/secundário , Melanoma Experimental/terapia , Terapia Viral Oncolítica/métodos , Vírus Oncolíticos/imunologia , Linfócitos T/transplante , Imunidade Adaptativa , Animais , Morte Celular , Citotoxicidade Imunológica , Linfonodos/virologia , Metástase Linfática , Melanoma Experimental/imunologia , Melanoma Experimental/patologia , Camundongos , Camundongos Endogâmicos C57BL , Reoviridae/imunologia , Reoviridae/isolamento & purificação , Resultado do Tratamento , Células Tumorais Cultivadas , Carga Viral
8.
Br J Cancer ; 101(7): 1175-82, 2009 Oct 06.
Artigo em Inglês | MEDLINE | ID: mdl-19789534

RESUMO

BACKGROUND: No circulating markers are routinely used for renal cancer. The objective of this pilot study was to investigate whether conditioned media (CM) from renal cancer cell lines contains potential biomarkers that, when measured in clinical fluids, have diagnostic or prognostic utility. METHODS: Comparative 2D PAGE profiling of CM from renal cell carcinoma (RCC) and normal renal cultures identified cathepsin D that was subsequently validated in urine samples from 239 patients and healthy and benign disease subjects. RESULTS: Urinary cathepsin D was found to be significantly associated with overall (OS) (hazard ratio, HR, 1.33, 95%CI [1.09-1.63], P=0.005) and cancer-specific survival (HR 1.36, 95%CI [1.07-1.74], P=0.013) in RCC patients on univariate analysis. An optimal cut point (211 ng ml(-1) micromolCr(-1)) around which to stratify patients by OS was determined. Five-year OS equal to/above and below this value was 47.0% (95%CI 35.4%, 62.4%) and 60.9% (48.8%, 76.0%), respectively. On multivariable analysis using pre-operative variables, cathepsin D showed some evidence of independent prognostic value for OS (likelihood ratio test P-value=0.056) although requiring further validation in larger patient numbers with sufficient statistical power to determine independent significance. CONCLUSION: These data establish an important proof of principle and show the potential of proteomics-based studies. Cathepsin D may be of value as a pre-operative urinary biomarker for RCC, alone or in combination.


Assuntos
Biomarcadores Tumorais/urina , Carcinoma de Células Renais/mortalidade , Catepsina D/urina , Neoplasias Renais/mortalidade , Adulto , Idoso , Idoso de 80 Anos ou mais , Western Blotting , Carcinoma de Células Renais/urina , Linhagem Celular Tumoral , Meios de Cultivo Condicionados , Feminino , Humanos , Neoplasias Renais/urina , Masculino , Pessoa de Meia-Idade , Análise Multivariada , Projetos Piloto , Prognóstico , Proteômica
9.
Eur J Cancer ; 44(2): 216-23, 2008 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-18164612

RESUMO

Two studies were carried out to evaluate heat-killed Mycobacterium vaccae SRL172 as an immunotherapeutic agent for patients with metastatic, post-nephrectomy, renal cell carcinoma. In the first study, 60 patients in France and the UK received injections of SRL172, and their survival was compared with that of historical controls who had been treated either with biological response modifiers (IL-2, IFN-alpha) or chemotherapy. In the second study, 36 patients were randomised to receive treatment with IL-2 alone or IL-2 plus SRL172. Survival and adverse events related to the treatments were assessed and compared between treatment groups. The first study showed that those treated with SRL172 alone survived equally as long as those receiving IL-2 or IFN-alpha and both treatment groups survived longer than those on chemotherapy (p<0.001), a result supported by Cox's proportional hazards regression analysis. The second study, stopped early due to drug supply issues, showed that the addition of SRL172 to IL-2 made no difference to survival compared to IL-2 alone, in the limited numbers treated. Adverse events occurring in those receiving SRL172 in the first study were mild and in the second study those receiving IL-2 alone had significantly more adverse events than those receiving SRL172 plus IL-2 (p<0.001). It is concluded that SRL172 may have activity in metastatic renal cancer and has very low toxicity, making it worthy of further study.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Vacinas Bacterianas/uso terapêutico , Vacinas Anticâncer/uso terapêutico , Carcinoma de Células Renais/terapia , Imunoterapia/métodos , Neoplasias Renais/terapia , Adulto , Idoso , Idoso de 80 Anos ou mais , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Vacinas Bacterianas/efeitos adversos , Vacinas Anticâncer/administração & dosagem , Intervalo Livre de Doença , Feminino , Humanos , Interleucina-2/administração & dosagem , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos
10.
Clin Oncol (R Coll Radiol) ; 20(2): 101-12, 2008 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-18037277

RESUMO

The ability of the immune system to effectively respond to human tumours is a matter of long-term controversy. There is an increasing body of recent evidence to support a role for the immune system in eliminating pre-clinical cancers, an old concept termed 'immunosurveillance'. 'Immunoediting' is an updated hypothesis, in which selection pressures applied by the immune response to tumours modulate tumour immunogenicity and growth. Tumour infiltration by immune cells has been shown to have powerful prognostic significance in a host of cancer types. Paradoxically, in some circumstances the immune system can promote tumour development. Cytotoxic therapies, including radiotherapy and chemotherapy, induce potentially immunogenic cell death, releasing tumour-associated antigens in the context of a 'danger' signal to the immune system. An understanding of the interaction between immune cells, tumour cells and treatment modalities will therefore guide the future combination of immunotherapy with conventional therapy to achieve optimal anti-tumour effects.


Assuntos
Antineoplásicos/efeitos adversos , Sistema Imunitário/fisiologia , Neoplasias/imunologia , Animais , Antígenos de Neoplasias/fisiologia , Humanos , Sistema Imunitário/efeitos dos fármacos , Sistema Imunitário/efeitos da radiação , Tolerância Imunológica , Vigilância Imunológica , Camundongos , Modelos Imunológicos , Regressão Neoplásica Espontânea , Radioterapia/efeitos adversos , Evasão Tumoral
11.
Cell Death Differ ; 13(9): 1564-76, 2006 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-16410800

RESUMO

Comparing normal human urothelial (NHU) cells to a panel of six representative urothelial cell carcinoma (UCC)-derived cell lines, we showed that while TRAIL receptor expression patterns were similar, susceptibility to soluble recombinant crosslinked TRAIL fell into three categories. 4/6 carcinoma lines were sensitive, undergoing rapid and extensive death; NHU and 253J cells were partially resistant and HT1376 cells, like normal fibroblasts, were refractory. Both normal and malignant urothelial cells underwent apoptosis via the same caspase-8/9-mediated mechanism. Rapid receptor downregulation was a mechanism for evasion by some UCC cells. TRAIL resistance in malignant urothelial cells was partially dependent on FLIP(L) and was differentially mediated by p38(MAPK), whereas in normal cells, resistance was mediated by NF-kappaB. Importantly, extensive killing of UCC cells could be induced using noncrosslinked TRAIL after prolonged exposure, with no damage to their homologous, normal urothelial cell counterparts.


Assuntos
Receptores do Ligante Indutor de Apoptose Relacionado a TNF/biossíntese , Receptores do Fator de Necrose Tumoral/biossíntese , Ligante Indutor de Apoptose Relacionado a TNF/fisiologia , Neoplasias da Bexiga Urinária/metabolismo , Urotélio/metabolismo , Apoptose , Proteína Reguladora de Apoptosis Semelhante a CASP8 e FADD/metabolismo , Caspases/metabolismo , Linhagem Celular , Linhagem Celular Tumoral , Reagentes de Ligações Cruzadas/química , Regulação para Baixo , Humanos , Ligantes , Glicoproteínas de Membrana/química , Glicoproteínas de Membrana/farmacologia , NF-kappa B/metabolismo , Fragmentos de Peptídeos/química , Fragmentos de Peptídeos/farmacologia , Proteínas Recombinantes de Fusão/química , Proteínas Recombinantes de Fusão/farmacologia , Proteínas Recombinantes/farmacologia , Ligante Indutor de Apoptose Relacionado a TNF/farmacologia , Fator de Necrose Tumoral alfa/química , Fator de Necrose Tumoral alfa/farmacologia , Neoplasias da Bexiga Urinária/patologia , Urotélio/citologia , Proteínas Quinases p38 Ativadas por Mitógeno/metabolismo
12.
Cell Death Differ ; 13(10): 1789-801, 2006 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-16429118

RESUMO

Membrane-presented CD40 agonists can induce apoptosis in carcinoma, but not normal homologous epithelial cells, whereas soluble agonists are growth inhibitory but not proapoptotic unless protein synthesis is blocked. Here we demonstrate that membrane-presented CD40 ligand (CD154) (mCD40L), but not soluble agonists, triggers cell death in malignant human urothelial cells via a direct mechanism involving rapid upregulation of TNFR-associated factor (TRAF)3 protein, without concomitant upregulation of TRAF3 mRNA, followed by activation of the c-Jun N-terminal kinase (JNK)/activator protein-1 (AP-1) pathway and induction of the caspase-9/caspase-3-associated intrinsic apoptotic machinery. TRAF3 knockdown abrogated JNK/AP-1 activation and prevented CD40-mediated apoptosis, whereas restoration of CD40 expression in CD40-negative carcinoma cells restored apoptotic susceptibility via the TRAF3/AP-1-dependent mechanism. In normal human urothelial cells, mCD40L did not trigger apoptosis, but induced rapid downregulation of TRAF2 and 3, thereby paralleling the situation in B-lymphocytes. Thus, TRAF3 stabilization, JNK activation and caspase-9 induction define a novel pathway of CD40-mediated apoptosis in carcinoma cells.


Assuntos
Apoptose/fisiologia , Antígenos CD40/metabolismo , Proteínas Quinases JNK Ativadas por Mitógeno/metabolismo , Fator de Transcrição AP-1/metabolismo , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral/metabolismo , Neoplasias Urológicas/metabolismo , Neoplasias Urológicas/patologia , Sequência de Bases , Antígenos CD40/genética , Caspase 8 , Caspase 9 , Caspases/metabolismo , Linhagem Celular Tumoral , Expressão Gênica , Humanos , Ligantes , Interferência de RNA , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , RNA Neoplásico/genética , RNA Neoplásico/metabolismo , RNA Interferente Pequeno/genética , Solubilidade , Fator 3 Associado a Receptor de TNF , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral/antagonistas & inibidores , Peptídeos e Proteínas Associados a Receptores de Fatores de Necrose Tumoral/genética , Neoplasias Urológicas/imunologia , Urotélio/citologia , Urotélio/imunologia , Urotélio/metabolismo
13.
Biochim Biophys Acta ; 1729(2): 126-34, 2005 Jun 30.
Artigo em Inglês | MEDLINE | ID: mdl-15913809

RESUMO

The transcriptional control elements of tissue-specific genes may be exploited in the design of therapeutic constructs for use in human gene therapy. The uroplakins are a family of four proteins which form the asymmetric unit membrane of the urothelium. We have cloned the human uroplakin Ia gene and defined its genomic structure and transcriptional start site. Using quantitative RT-PCR in an extended panel of normal tissues, we have demonstrated highly urothelial-specific expression of this gene. A Dual-Luciferase assay was used to assess the transcriptional activity of a variety of promoter fragments of the human uroplakin Ia gene. A highly specific promoter fragment (consisting of 2147 bp of 5'-flanking sequence, intron 1 and the 5' UTR) was identified which regulated urothelial-specific expression in vitro. The human uroplakin Ia promoter identified has potential use in future gene therapy strategies to restrict transgene expression to the urothelium.


Assuntos
Regulação da Expressão Gênica , Glicoproteínas de Membrana/biossíntese , Glicoproteínas de Membrana/genética , Região 5'-Flanqueadora , Sequência de Bases , Linhagem Celular , Clonagem Molecular , Humanos , Dados de Sequência Molecular , Regiões Promotoras Genéticas , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Distribuição Tecidual , Sítio de Iniciação de Transcrição , Uroplaquina Ia
14.
Cancer Res ; 42(11): 4758-62, 1982 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-7127312

RESUMO

Human melanoma xenografts in immune-deprived mice have been used to assess the value of the agar diffusion chamber for chemosensitivity testing. Tumor cells were treated with melphalan, Adriamycin, or methyl trans-1-(2-chloroethyl)-3-(4-methylcyclohexyl)-1-nitrosourea either as solid tumors growing in mice or as suspensions in agar in i.p. diffusion chambers. Survival of clonogenic human tumor cells was measured by the agar diffusion chamber assay in both cases. Cell survival curves were log-linear for treatment of tumor cells in vivo or in the chambers. For melphalan the slopes of survival curves were significantly greater for treatment in the chambers than as solid tumors in vivo, but for methyl trans-1-(2-chloroethyl(-3-(4-methylcyclohexyl)-1-nitrosourea or Adriamycin, they were indistinguishable. Experiments with [14C]melphalan showed that the levels of drug achieved were less inside the diffusion chambers than in the tumors in vivo so that the sensitivity of tumor cells to melphalan was much greater when they were treated in chambers. The differences in drug exposure and in cellular chemosensitivity between chambers and tumors suggest caution in the interpretation of drug testing using this system, but the log-linear nature of the dose-response curves is an important feature which may be useful in the eventual development of optimal chemosensitivity testing systems.


Assuntos
Antineoplásicos/uso terapêutico , Melanoma/tratamento farmacológico , Ágar , Animais , Sobrevivência Celular/efeitos dos fármacos , Difusão , Doxorrubicina/uso terapêutico , Avaliação Pré-Clínica de Medicamentos/métodos , Humanos , Melfalan/uso terapêutico , Camundongos , Transplante de Neoplasias , Semustina/uso terapêutico , Transplante Heterólogo
15.
Cancer Res ; 61(4): 1678-85, 2001 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-11245483

RESUMO

Interactions between epithelial cells and the extracellular matrix are central to tissue homeostasis and have a dynamic role in tissue remodeling and repair. Regulation of these pathways is balanced by positive and negative feedback elements, many of which have been implicated in the pathways of malignant progression. We have used differential display to identify genes that are up-regulated in normal human urothelial cells in response to exposure to extracellular matrix proteins (Matrigel) in vitro. This approach has identified genes that have key roles in cell-cell and cell-matrix interactions and that have been implicated in the progression of carcinomas of urothelial or other epithelial cell origins. One confirmed but unknown differentially expressed sequence was used to isolate a full-length gene, MIG-C4, from a human urothelial cDNA library. This gene was found to encode a novel urokinase plasminogen-activator receptor-like member of the Ly-6 family of glycosyl-phosphatidylinositol-anchored glycoproteins, and was identified as the human homologue of the rat metastasis-associated C4.4A gene. By in situ hybridization, MIG-C4 was expressed variably in normal urothelium and intensely in the tumor component of some noninvasive superficial lesions and in invasive and metastatic urothelial cancers. Thus, our approach has identified previously nonimplicated gene products involved in normal urothelium-matrix interactions that could be tumor-invasion or suppressor-gene targets in the development of invasive and metastatic tumor phenotypes.


Assuntos
Carcinoma de Células de Transição/genética , Matriz Extracelular/fisiologia , Pelve Renal/fisiologia , Ureter/fisiologia , Neoplasias Urológicas/genética , Sequência de Aminoácidos , Animais , Carcinoma de Células de Transição/metabolismo , Comunicação Celular/genética , Comunicação Celular/fisiologia , Colágeno , DNA Complementar/genética , DNA Complementar/isolamento & purificação , Combinação de Medicamentos , Matriz Extracelular/metabolismo , Perfilação da Expressão Gênica , Regulação da Expressão Gênica , Regulação Neoplásica da Expressão Gênica , Humanos , Hibridização In Situ , Pelve Renal/citologia , Pelve Renal/metabolismo , Laminina , Dados de Sequência Molecular , Proteoglicanas , Ratos , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Homologia de Sequência de Aminoácidos , Células Tumorais Cultivadas , Ureter/citologia , Ureter/metabolismo , Neoplasias Urológicas/metabolismo
16.
Cancer Res ; 60(21): 6160-70, 2000 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-11085540

RESUMO

Ewing's sarcoma is thought to arise after developmental arrest of primitive neural cells during embryogenesis. Because basic fibroblast growth factor (bFGF) has a critical role in the regulation of cell survival, proliferation, and differentiation during embryogenesis, we have tested the hypothesis that bFGF and FGF receptors may contribute to the development of Ewing's sarcoma and may provide a mechanism for the modulation of their behavior. All four of the Ewing's sarcoma cell lines examined expressed bFGF and FGF receptors, which were detected by immunofluorescence and Western blotting. bFGF-induced a significant dose-dependent decrease in Ewing's sarcoma cell proliferation on plastic and reduced anchorage-independent growth in soft agar. Unexpectedly, this decrease in cell number reflected bFGF-induced apoptosis and necrosis, as demonstrated by electron microscopy, binding of annexin V, and staining with acridine orange. Induction of cell death was dependent on dosage of, and period of exposure to, bFGF. bFGF did not induce differentiation of Ewing's sarcoma cells in either the presence or the absence of serum or nerve growth factor. Treatment of NuNu mice with bFGF decreased growth of the highly tumorigenic Ewing's sarcoma cell lines. Histologically tumors grown in the NuNu mice treated with bFGF were less cellular than those in control mice, and showed an increased level of apoptotic nuclei. This is in contrast to the mitogenic effect bFGF has in most other cancer cells. In summary, bFGF decreases Ewing's sarcoma growth in vitro and in vivo by the induction of cell death. This novel observation may provide a new therapeutic strategy for Ewing's sarcomas.


Assuntos
Neoplasias Ósseas/patologia , Fator 2 de Crescimento de Fibroblastos/farmacologia , Sarcoma de Ewing/patologia , Neoplasias de Tecidos Moles/patologia , Animais , Apoptose/efeitos dos fármacos , Neoplasias Ósseas/tratamento farmacológico , Neoplasias Ósseas/metabolismo , Contagem de Células , Morte Celular/efeitos dos fármacos , Diferenciação Celular/efeitos dos fármacos , Divisão Celular/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Feminino , Fator 2 de Crescimento de Fibroblastos/biossíntese , Humanos , Camundongos , Camundongos Nus , Necrose , Fator de Crescimento Neural/farmacologia , Tumores Neuroectodérmicos Primitivos Periféricos/tratamento farmacológico , Tumores Neuroectodérmicos Primitivos Periféricos/metabolismo , Tumores Neuroectodérmicos Primitivos Periféricos/patologia , Receptores de Fatores de Crescimento de Fibroblastos/biossíntese , Sarcoma de Ewing/tratamento farmacológico , Sarcoma de Ewing/metabolismo , Neoplasias de Tecidos Moles/tratamento farmacológico , Neoplasias de Tecidos Moles/metabolismo , Células Tumorais Cultivadas , Ensaios Antitumorais Modelo de Xenoenxerto
17.
Cancer Res ; 60(11): 2898-905, 2000 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-10850435

RESUMO

The assessment of angiogenesis in breast cancer is of importance as a key indicator of survival and response to therapy. Circulating vascular endothelial growth factor (VEGF) measurements may provide a less subjective analysis than microvessel density (MVD) or immunohistochemical analysis of VEGF expression; however, most studies have used serum, which is now known to largely reflect platelet-derived VEGF concentrations. This study examined for the first time both plasma (VEGFp) and serum (VEGFs) VEGF concentrations in 201 blood samples from pre- and postmenopausal healthy controls and from patients with benign breast disease, localized breast cancer, breast cancer in remission, or metastatic breast cancer and related these to other clinicopathological markers. VEGFp but not VEGFs concentrations of patients with localized disease were significantly elevated compared with normal controls (P = 0.016). Patients with metastatic disease had higher VEGFp and VEGFs levels than normal controls (P < 0.001, P = 0.044 respectively), and higher VEGFp, but not VEGFs, than patients with benign disease (P = 0.009) and patients with localized disease (P = 0.004). However, the highest VEGFp and VEGFs concentrations were seen in patients in remission compared with normal controls (P < 0.001 and P = 0.008, respectively). VEGFp concentrations in patients in remission were also higher than in patients with benign disease (P = 0.01) or patients with localized disease (P = 0.005). Tamoxifen treatment was significantly associated with higher circulating and platelet-derived VEGF levels. Circulating VEGF did not correlate with any clinicopathological factor, including MVD or VEGF expression. VEGF expression was significantly correlated with estrogen receptor status and inversely correlated with tumor grade. MVD correlated with tumor size. Tamoxifen-induced increases in VEGF may be important in clinical prognosis or associated pathologies.


Assuntos
Antineoplásicos Hormonais/farmacologia , Neoplasias da Mama/sangue , Neoplasias da Mama/irrigação sanguínea , Neoplasias da Mama/metabolismo , Fatores de Crescimento Endotelial/biossíntese , Linfocinas/biossíntese , Microcirculação/metabolismo , Tamoxifeno/farmacologia , Adulto , Idoso , Idoso de 80 Anos ou mais , Plaquetas/metabolismo , Progressão da Doença , Fatores de Crescimento Endotelial/sangue , Feminino , Humanos , Imuno-Histoquímica , Linfocinas/sangue , Pessoa de Meia-Idade , Metástase Neoplásica , Indução de Remissão , Fator A de Crescimento do Endotélio Vascular , Fatores de Crescimento do Endotélio Vascular
18.
J Clin Oncol ; 17(3): 998-1007, 1999 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-10071295

RESUMO

PURPOSE: To evaluate alternative automated methods of collecting data on quality of life (QOL) in cancer patients. After initial evaluation of a range of technologies, we compared computer touch-screen questionnaires with paper questionnaires scanned by optical reading systems in terms of patients' acceptance, data quality, and reliability. PATIENTS AND METHODS: In a randomized cross-over trial, 149 cancer patients completed the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire-Core 30, version 2.0 (EORTC QLQ-C30), and the Hospital Anxiety and Depression Scale (HADS) on paper and on a touch screen. In a further test-retest study, 81 patients completed the electronic version of the questionnaires twice, with a time interval of 3 hours between questionnaires. RESULTS: Fifty-two percent of the patients preferred the touch screen to paper; 24% had no preference. The quality of the data collected with the touch-screen system was good, with no missed responses. At the group level, the differences between scores obtained with the two modes of administration of the instruments were small, suggesting equivalence for most of the QOL scales, with the possible exception of the emotional, fatigue, and nausea/vomiting scales and the appetite item, where patients tended to give more positive responses on the touch screen. At the individual patient level, the agreement was good, with a kappa coefficient from 0.57 to 0.77 and percent global agreement from 61% to 97%. The electronic questionnaire had good test-retest reliability, with correlation coefficients between the two administrations from 0.78 to 0.95, kappa coefficients of agreement from 0.55 to 0.90, and percent global agreement from 56% to 100%. CONCLUSION: Computer touch-screen QOL questionnaires were well accepted by cancer patients, with good data quality and reliability.


Assuntos
Neoplasias/psicologia , Qualidade de Vida , Adulto , Idoso , Computadores , Estudos Cross-Over , Coleta de Dados , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias/terapia , Inventário de Personalidade , Reprodutibilidade dos Testes , Inquéritos e Questionários
19.
J Clin Oncol ; 12(4): 764-8, 1994 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-8151320

RESUMO

PURPOSE: To present long-term follow-up data of patients with myeloma treated with high-dose melphalan HDM, including an assessment of prognostic factors. PATIENTS AND METHODS: Between November 1981 and April 1986, 63 previously untreated patients with multiple myeloma received HDM 140 mg/m2 without autologous bone marrow transplantation. RESULTS: The overall response rate was 82% (51 of 62), with 32% (20 of 62) patients entering complete remission (CR). The median duration of response was 18 months, and six patients remain alive and free from disease progression at 60+ to 84+ months. Improvements in quality of life associated with remission were immediate in terms of pain grade (89% of patients) and performance status (92%), and later in terms of bone healing (29%). Currently, at a median follow-up duration of 74 months (range, 63 to 100) since HDM, 23 patients are alive with a median survival duration of 47 months, and 35% of patients are expected to be alive at 9 years. Apart from early-stage disease, no factors were found to predict long-term survival. No second malignancies or other late side effects have been recorded. CONCLUSION: Single-agent HDM without autologous bone marrow transplantation is a feasible therapeutic option in myeloma, and is associated with a high objective response rate, relatively long remission durations, and good symptom control.


Assuntos
Melfalan/uso terapêutico , Mieloma Múltiplo/tratamento farmacológico , Adulto , Idoso , Feminino , Seguimentos , Humanos , Masculino , Melfalan/administração & dosagem , Melfalan/efeitos adversos , Pessoa de Meia-Idade , Prognóstico , Qualidade de Vida , Análise de Sobrevida , Resultado do Tratamento
20.
J Clin Oncol ; 21(2): 374-82, 2003 Jan 15.
Artigo em Inglês | MEDLINE | ID: mdl-12525532

RESUMO

PURPOSE: Systematic quality-of-life (QOL) assessment may have value in oncology practice by increasing awareness of a wide range of issues, possibly increasing detection of psychologic morbidity, social problems, and changes in physical status, and improving care and its outcomes. However, logistic problems are substantial. Automated systems solve many of these problems. We field-tested the feasibility and compliance that can be achieved using a computer touchscreen system in two consecutive studies. PATIENTS AND METHODS: In study 1, a prospective cohort of 272 patients was offered QOL assessment at each clinic appointment for 6 months. In study 2, all patients (N = 1,291) were offered QOL assessment as part of clinic routine during a 12-week period. RESULTS: In study 1, 82% of patients agreed to take part, but over time, compliance was poor (median, 40%; mean, 43%) and deteriorated with longer follow-up. In study 2, the overall compliance was greatly increased (median, 100%; mean, 70%), and compliance was retained over multiple visits. In study 1, compliance was better in younger patients, males, and socially advantaged patients, but was not affected by the presence of depression or anxiety, or QOL. In the second study, building on experience in the first study, data collection and storage in the computer system was excellent, achieving 98% of collected data stored in one center. In general, patients were comfortable with the computers and the approach. Data collection on the wards was more difficult and less complete than in clinics, especially for patients undergoing acute admissions. CONCLUSION: Feasibility with higher compliance was demonstrated in study 2, in which the data collection was integrated into routine care, and can be improved with further technical initiatives and education of staff.


Assuntos
Coleta de Dados/métodos , Neoplasias/psicologia , Cooperação do Paciente , Qualidade de Vida , Adulto , Idoso , Idoso de 80 Anos ou mais , Automação , Estudos de Coortes , Computadores , Estudos de Viabilidade , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias/terapia , Estudos Prospectivos , Psicometria/métodos , Projetos de Pesquisa , Fatores Socioeconômicos , Inquéritos e Questionários
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