Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 29
Filtrar
3.
BMJ ; 377: e067745, 2022 06 10.
Artigo em Inglês | MEDLINE | ID: mdl-35688481

RESUMO

OBJECTIVE: To describe an approach for reporting master protocol research programs (MPRPs) that is consistent with existing good reporting practices and that uses structured information to convey the overall master protocol and design of each substudy. DESIGN: Qualitative analysis. DATA SOURCES: ClinicalTrials.gov trial registry. MAIN OUTCOME MEASURES: Established goals and related practices of the trial reporting system were outlined, examples and key characteristics of MPRPs were reviewed, and specific challenges in registering and reporting summary results to databases designed for traditional clinical trial designs that rely on a model of one study per protocol were identified. RESULTS: A reporting approach is proposed that accommodates the complex study design of MPRPs and their results. This approach involves the use of separate registration records for each substudy within one MPRP protocol (with potential exceptions noted). CONCLUSIONS: How the proposed approach allows for clear, descriptive, structured information about each substudy's prespecified design and supports timely reporting of results after completion of each substudy is described and illustrated. Although the focus is on reporting to ClinicalTrials.gov, the approach supports broader application across trial registries and results databases. This paper is intended to stimulate further discussion of this approach among stakeholders, build awareness about the need to improve reporting of MPRPs, and encourage harmonization across trial registries globally.


Assuntos
Ensaios Clínicos como Assunto , Projetos de Pesquisa , Bases de Dados Factuais , Humanos , Pesquisa Qualitativa , Sistema de Registros
4.
Cancer J ; 28(2): 111-117, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35333495

RESUMO

ABSTRACT: The COVID-19 pandemic posed unprecedented strain on enrollment to cancer clinical trials and their conduct. Here, we highlight an analysis using information from the National Cancer Institute (NCI) Clinical Trials Reporting Program database to describe enrollment patterns to interventional cancer treatment trials at NCI-Designated Cancer Centers during the pandemic. Enrollment to cancer treatment trials at NCI-Designated Cancer Centers decreased precipitously early in the pandemic and has not yet fully returned to the 2019 baseline as of mid-2021. We discuss possible reasons for this and how some of the changes in clinical trial conduct implemented during the pandemic may become part of the standard conduct of NCI-supported clinical trials and broaden access to trials.


Assuntos
COVID-19 , Ensaios Clínicos como Assunto , Neoplasias , Participação do Paciente , COVID-19/epidemiologia , Bases de Dados Factuais , Humanos , National Cancer Institute (U.S.) , Neoplasias/epidemiologia , Neoplasias/terapia , Pandemias , Participação do Paciente/estatística & dados numéricos , Estados Unidos/epidemiologia
5.
J Natl Cancer Inst ; 113(10): 1281-1284, 2021 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-33057660

RESUMO

The coronavirus disease 2019 (COVID-19) pandemic and related socioeconomic events have markedly changed the environment in which cancer clinical trials are conducted. These events have resulted in a substantial, immediate-term decrease in accrual to both diagnostic and therapeutic cancer investigations as well as substantive alterations in patterns of oncologic care. The sponsors of clinical trials, including the US National Cancer Institute, as well as the cancer centers and community oncology practices that conduct such studies, have all markedly adapted their models of care, usage of healthcare personnel, and regulatory requirements in the attempt to continue clinical cancer investigations while maintaining high levels of patient safety. In doing so, major changes in clinical trials practice have been embraced nationwide. There is a growing consensus that the regulatory and clinical research process alterations that have been adopted in response to the pandemic (such as the use of telemedicine visits to reduce patient travel requirements and the application of remote informed consent procedures) should be implemented long term. The COVID-19 outbreak has also refocused the oncologic clinical trials community on the need to bring clinical trials closer to patients by dramatically enhancing clinical trial access, especially for minority and underserved communities that have been disproportionately affected by the pandemic. In this commentary, changes to the program of clinical trials supported by the National Cancer Institute that could improve clinical trial availability, effectiveness, and diversity are proposed.


Assuntos
Pesquisa Biomédica , COVID-19/epidemiologia , Ensaios Clínicos como Assunto , Oncologia , SARS-CoV-2 , Justiça Social , Humanos
6.
Cancer Prev Res (Phila) ; 13(12): 1027-1036, 2020 12.
Artigo em Inglês | MEDLINE | ID: mdl-32753377

RESUMO

Breast ductal cytologic atypia is an important risk factor for sporadic breast cancer. Characterization of the associated normal breast tissue is needed to develop additional methods of risk assessment and new targets for breast cancer prevention. We conducted a prospective clinical trial evaluating women at normal-risk or at high-risk for sporadic breast cancer. Breast ductal cells were collected and studied cytologically and by gene expression profiling, and breast ductal architectural changes were studied by breast ductal endoscopy (BDE) and breast MRI. One hundred and forty subjects were studied, 70 at high risk (RR, 2.0-4.6) and 70 at normal risk. Cytologic atypia was present in 22.9% of high-risk and 25.7% of normal-risk subjects. Ductal endoscopy was performed in 89 subjects and revealed benign intraductal abnormalities, primarily intraductal fibrous webbing suggesting chronic inflammation, in 40.4% of high-risk and 5.4% of normal-risk subjects, respectively (P 2 = 0.0002). Two high-risk subjects with atypia and no normal-risk subjects with atypia developed invasive breast cancer. Gene expression profiling of ductal cells showed comparable gene expression profiles without enriched expression of previously defined oncogenic signatures in subjects with cellular atypia compared with those without atypia, and in high-risk subjects compared with normal-risk subjects (FDR > 0.5). Cytologic ductal atypia in normal-risk subjects does not appear to be of clinical significance. Atypia in women at high risk may be associated with benign and malignant breast ductal abnormalities; these characteristics of high-risk ductal cells may not be reflected in gene expression profiles.


Assuntos
Biomarcadores Tumorais/metabolismo , Neoplasias da Mama/patologia , Mama/patologia , Carcinoma Ductal de Mama/patologia , Carcinoma Intraductal não Infiltrante/patologia , Citodiagnóstico/métodos , Medição de Risco/métodos , Adulto , Idoso , Biomarcadores Tumorais/genética , Mama/metabolismo , Neoplasias da Mama/genética , Neoplasias da Mama/metabolismo , Carcinoma Ductal de Mama/genética , Carcinoma Ductal de Mama/metabolismo , Carcinoma Intraductal não Infiltrante/genética , Carcinoma Intraductal não Infiltrante/metabolismo , Feminino , Seguimentos , Perfilação da Expressão Gênica , Regulação Neoplásica da Expressão Gênica , Humanos , Pessoa de Meia-Idade , Prognóstico , Estudos Prospectivos
7.
Semin Oncol ; 46(4-5): 308-313, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31711680

RESUMO

Cancer clinical trials represent an important option for patients with a diagnosis of cancer and the clinician-investigators involved in their care who seek options for their disease. For all who are impacted by cancer, these studies offer opportunities for greater learning. Conducting these important studies involves several challenges, including recruiting eligible participants. To address barriers that arise over the course of these activities, the Department of Veterans Affairs (VA) and National Cancer Institute (NCI) have partnered to increase Veteran participation in oncology clinical trials. This initiative, the NCI And VA Interagency Group to Accelerate Trials Enrollment, or NAVIGATE, is focused on addressing recruitment across the VA healthcare system and finding systematic solutions related to activating, recruiting for and conducting oncology clinical trials at VA Medical Centers. Additional goals include (1) establishing a sustainable network that can serve as a model for other VA sites interested in doing cancer clinical trials, (2) recruitment of minority patients, and (3) developing best practices and policies that can be deployed across the VA healthcare system. In this manuscript, we describe the scope, organization, activities, and future directions of NAVIGATE while also highlighting key needs for successfully conducting cancer clinical trials within the VA system. This partnership between 2 large federal agencies with a shared commitment to improving cancer care may provide lessons to others who are also dedicated to helping those affected by the disease.


Assuntos
Ensaios Clínicos como Assunto/organização & administração , Oncologia/organização & administração , Administração dos Cuidados ao Paciente/organização & administração , Humanos , Oncologia/métodos , Oncologia/normas , National Cancer Institute (U.S.) , Assistência ao Paciente , Melhoria de Qualidade , Estados Unidos , United States Department of Veterans Affairs
8.
Clin Cancer Res ; 22(8): 1907-13, 2016 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-26888828

RESUMO

There is strong evidence that cigarette smoking causes adverse outcomes in people with cancer. However, more research is needed regarding those effects and the effects of alternative tobacco products and of secondhand smoke, the effects of cessation (before diagnosis, during treatment, or during survivorship), the biologic mechanisms, and optimal strategies for tobacco dependence treatment in oncology. Fundamentally, tobacco is an important source of variation in clinical treatment trials. Nevertheless, tobacco use assessment has not been uniform in clinical trials. Progress has been impeded by a lack of consensus regarding tobacco use assessment suitable for cancer patients. The NCI-AACR Cancer Patient Tobacco Use Assessment Task Force identified priority research areas and developed recommendations for assessment items and timing of assessment in cancer research. A cognitive interview study was conducted with 30 cancer patients at the NIH Clinical Center to evaluate and improve the measurement items. The resulting Cancer Patient Tobacco Use Questionnaire (C-TUQ) includes "Core" items for minimal assessment of tobacco use at initial and follow-up time points, and an "Extension" set. Domains include the following: cigarette and other tobacco use status, intensity, and past use; use relative to cancer diagnosis and treatment; cessation approaches and history; and secondhand smoke exposure. The Task Force recommends that assessment occur at study entry and, at a minimum, at the end of protocol therapy in clinical trials. Broad adoption of the recommended measures and timing protocol, and pursuit of the recommended research priorities, will help us to achieve a clearer understanding of the significance of tobacco use and cessation for cancer patients.


Assuntos
Guias como Assunto , Oncologia , Pesquisa , Uso de Tabaco , Comitês Consultivos , Humanos , Oncologia/métodos , Oncologia/normas , Pesquisa/normas , Medição de Risco , Uso de Tabaco/efeitos adversos
9.
Breast Cancer (Auckl) ; 9: 31-40, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26078587

RESUMO

BACKGROUND: There is a strong need to define the molecular changes in normal at-risk breast epithelium to identify biomarkers and new targets for breast cancer prevention and to develop a molecular signature for risk assessment. Improved methods of breast epithelial sampling are needed to promote whole-genome molecular profiling, increase ductal epithelial cell yield, and reduce sample cell heterogeneity. METHODS: We developed an improved method of breast ductal sampling with ductal lavage through a 22-gauge catheter and collection of ductal samples with a microaspirator. Women at normal risk or increased risk for breast cancer were studied. Ductal epithelial samples were analyzed for cytopathologic changes, cellular yield, epithelial cell purity, quality and quantity of DNA and RNA, and use in multiple downstream molecular applications. RESULTS: We studied 50 subjects, including 40 subjects at normal risk for breast cancer and 37 subjects with non-nipple aspirate fluid-yielding ducts. This method provided multiple 1.0 mL samples of high ductal epithelial cell content (median ≥8 samples per subject of ≥5,000 cells per sample) with 80%-100% epithelial cell purity. Extraction of a single intact ductal sample (fluid and cells) or the separate frozen cellular component provided DNA and RNA for multiple downstream studies, including quantitative reverse transcription- polymerase chain reaction (PCR) for microRNA, quantitative PCR for the human telomerase reverse transcriptase gene, whole-genome DNA amplification, and array comparative genomic hybridization analysis. CONCLUSION: An improved breast epithelial sampling method has been developed, which should significantly expand the acquisition and biomarker analysis of breast ductal epithelium in women at risk for breast cancer.

10.
Breast Cancer Res ; 16(4): 424, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25159706

RESUMO

INTRODUCTION: Mammographic density is similar among women at risk of either sporadic or BRCA1/2-related breast cancer. It has been suggested that digitized mammographic images contain computer-extractable information within the parenchymal pattern, which may contribute to distinguishing between BRCA1/2 mutation carriers and non-carriers. METHODS: We compared mammographic texture pattern features in digitized mammograms from women with deleterious BRCA1/2 mutations (n = 137) versus non-carriers (n = 100). Subjects were stratified into training (107 carriers, 70 non-carriers) and testing (30 carriers, 30 non-carriers) datasets. Masked to mutation status, texture features were extracted from a retro-areolar region-of-interest in each subject's digitized mammogram. Stepwise linear regression analysis of the training dataset identified variables to be included in a radiographic texture analysis (RTA) classifier model aimed at distinguishing BRCA1/2 carriers from non-carriers. The selected features were combined using a Bayesian Artificial Neural Network (BANN) algorithm, which produced a probability score rating the likelihood of each subject's belonging to the mutation-positive group. These probability scores were evaluated in the independent testing dataset to determine whether their distribution differed between BRCA1/2 mutation carriers and non-carriers. A receiver operating characteristic analysis was performed to estimate the model's discriminatory capacity. RESULTS: In the testing dataset, a one standard deviation (SD) increase in the probability score from the BANN-trained classifier was associated with a two-fold increase in the odds of predicting BRCA1/2 mutation status: unadjusted odds ratio (OR) = 2.00, 95% confidence interval (CI): 1.59, 2.51, P = 0.02; age-adjusted OR = 1.93, 95% CI: 1.53, 2.42, P = 0.03. Additional adjustment for percent mammographic density did little to change the OR. The area under the curve for the BANN-trained classifier to distinguish between BRCA1/2 mutation carriers and non-carriers was 0.68 for features alone and 0.72 for the features plus percent mammographic density. CONCLUSIONS: Our findings suggest that, unlike percent mammographic density, computer-extracted mammographic texture pattern features are associated with carrying BRCA1/2 mutations. Although still at an early stage, our novel RTA classifier has potential for improving mammographic image interpretation by permitting real-time risk stratification among women undergoing screening mammography.


Assuntos
Neoplasias da Mama/genética , Neoplasias da Mama/patologia , Genes BRCA1 , Genes BRCA2 , Glândulas Mamárias Humanas/anormalidades , Mutação , Adulto , Idoso , Densidade da Mama , Neoplasias da Mama/diagnóstico , Conjuntos de Dados como Assunto , Feminino , Heterozigoto , Humanos , Mamografia , Pessoa de Meia-Idade , Fatores de Risco , Sensibilidade e Especificidade
11.
J Natl Cancer Inst ; 105(13): 954-9, 2013 Jul 03.
Artigo em Inglês | MEDLINE | ID: mdl-23776198

RESUMO

BACKGROUND: The National Cancer Institute (NCI) organized the Operational Efficiency Working Group in 2008 to develop recommendations for improving the speed with which NCI-sponsored clinical trials move from the idea stage to a protocol open to patient enrollment. METHODS: Given the many stakeholders involved, the Operational Efficiency Working Group advised a multifaceted approach to mobilize the entire research community to improve their business processes. New staff positions to monitor progress, protocol-tracking Web sites, and strategically planned conference calls were implemented. NCI staff and clinical teams at Cooperative Groups and Cancer Centers strived to achieve new target timelines but, most important, agreed to abide by absolute deadlines. For phase I-II studies and phase III studies, the target timelines are 7 months and 10 months, whereas the absolute deadlines were set at 18 and 24 months, respectively. Trials not activated by the absolute deadline are automatically disapproved. RESULTS: The initial experience is encouraging and indicates a reduction in development times for phase I-II studies from the historical median of 541 days to a median of 442 days, an 18.3% decrease. The experience with phase III studies to date, although more limited (n = 25), demonstrates a 45.7% decrease in median days. CONCLUSIONS: Based upon this progress, the NCI and the investigator community have agreed to reduce the absolute deadlines to 15 and 18 months for phase I-II and III trials, respectively. Emphasis on initiating trials rapidly is likely to help reduce the time it takes for clinical trial results to reach patients in need of new treatments.


Assuntos
Ensaios Clínicos como Assunto/normas , Estudos Multicêntricos como Assunto/normas , Ensaios Clínicos como Assunto/métodos , Ensaios Clínicos como Assunto/tendências , Ensaios Clínicos Fase I como Assunto/normas , Ensaios Clínicos Fase II como Assunto/normas , Ensaios Clínicos Fase III como Assunto/normas , Guias como Assunto , Humanos , Estudos Multicêntricos como Assunto/métodos , Estudos Multicêntricos como Assunto/tendências , National Cancer Institute (U.S.) , Fatores de Tempo , Estados Unidos
12.
Am J Pathol ; 181(5): 1807-22, 2012 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-23062488

RESUMO

Ductal carcinoma in situ (DCIS) is a precursor lesion of invasive ductal carcinoma (IDC) of the breast. To understand the dynamics of genomic alterations in this progression, we used four multicolor fluorescence in situ hybridization probe panels consisting of the oncogenes COX2, MYC, HER2, CCND1, and ZNF217 and the tumor suppressor genes DBC2, CDH1, and TP53 to visualize copy number changes in 13 cases of synchronous DCIS and IDC based on single-cell analyses. The DCIS had a lower degree of chromosomal instability than the IDC. Despite enormous intercellular heterogeneity in DCIS and IDC, we observed signal patterns consistent with a nonrandom distribution of genomic imbalances. CDH1 was most commonly lost, and gain of MYC emerged during progression from DCIS to IDC. Four of 13 DCISs showed identical clonal imbalances in the IDCs. Six cases revealed a switch, and in four of those, the IDC had acquired a gain of MYC. In one case, the major clone in the IDC was one of several clones in the DCIS, and in another case, the major clone in the DCIS became one of the two major clones in the IDC. Despite considerable chromosomal instability, in most cases the evolution from DCIS to IDC is determined by recurrent patterns of genomic imbalances, consistent with a biological continuum.


Assuntos
Neoplasias da Mama/genética , Carcinoma Ductal de Mama/genética , Carcinoma Intraductal não Infiltrante/genética , Instabilidade Cromossômica/genética , Heterogeneidade Genética , Proteínas Proto-Oncogênicas c-myc/genética , Análise de Célula Única/métodos , Adulto , Idoso , Biomarcadores Tumorais/genética , Neoplasias da Mama/patologia , Carcinoma Intraductal não Infiltrante/patologia , Células Clonais , Progressão da Doença , Feminino , Genes Neoplásicos/genética , Genoma Humano/genética , Humanos , Hibridização in Situ Fluorescente , Pessoa de Meia-Idade , Invasividade Neoplásica , Ploidias
13.
Cancer Prev Res (Phila) ; 3(4): 416-9, 2010 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-20332302

RESUMO

This perspective on Varella-Garcia et al. (beginning on p. 447 in this issue of the journal) examines the role of interphase fluorescence in situ hybridization for the early detection of lung cancer. This work is an important step toward identifying and validating a molecular marker in sputum samples for lung cancer early detection and highlights the value of establishing cohort studies with biorepositories of samples collected from participants followed over time for disease development.


Assuntos
Biomarcadores Tumorais/genética , Citogenética/métodos , Detecção Precoce de Câncer/métodos , Neoplasias Pulmonares/diagnóstico , Escarro/citologia , Biomarcadores Tumorais/análise , Humanos , Hibridização in Situ Fluorescente , Interfase , Neoplasias Pulmonares/genética
14.
Breast Cancer Res Treat ; 123(1): 245-55, 2010 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-20130984

RESUMO

Elevated mammographic density (MD) is one of the strongest risk factors for sporadic breast cancer. Epidemiologic evidence suggests that MD is, in part, genetically determined; however, the relationship between MD and BRCA1/2 mutation status is equivocal. We compared MD in unaffected BRCA1/2 mutation carriers enrolled in the U.S. National Cancer Institute's Clinical Genetics Branch's Breast Imaging Study (n = 143) with women at low-to-average breast cancer risk enrolled in the same study (n = 29) or the NCI/National Naval Medical Center's Susceptibility to Breast Cancer Study (n = 90). The latter were BRCA mutation-negative members of mutation-positive families or women with no prior breast cancer, a Pedigree Assessment Tool score <8 (i.e., low risk of a hereditary breast cancer syndrome) and a Gail score <1.67. A single experienced mammographer measured MD using a computer-assisted thresholding method. We collected standard breast cancer risk factor information in both studies. Unadjusted mean percent MD was higher in women with BRCA1/2 mutations compared with women at low-to-average breast cancer risk (37.3% vs. 33.4%; P = 0.04), but these differences disappeared after adjusting for age and body mass index (34.9% vs. 36.3%; P = 0.43). We explored age at menarche, nulliparity, age at first birth, menopausal status, number of breast biopsies, and exposure to exogenous hormonal agents as potential confounders of the MD and BRCA1/2 association. Taking these factors into account did not significantly alter the results of the age/body mass index-adjusted analysis. Our results do not provide support for an independent effect of BRCA1/2 mutation status on mammographic density.


Assuntos
Neoplasias da Mama/diagnóstico por imagem , Neoplasias da Mama/genética , Mamografia , Adulto , Feminino , Genes BRCA1 , Genes BRCA2 , Predisposição Genética para Doença , Humanos , Interpretação de Imagem Assistida por Computador , Pessoa de Meia-Idade , Mutação , Fatores de Risco
15.
Clin Cancer Res ; 15(17): 5323-37, 2009 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-19723653

RESUMO

The purpose of the National Cancer Institute pilot project to prioritize cancer antigens was to develop a well-vetted, priority-ranked list of cancer vaccine target antigens based on predefined and preweighted objective criteria. An additional aim was for the National Cancer Institute to test a new approach for prioritizing translational research opportunities based on an analytic hierarchy process for dealing with complex decisions. Antigen prioritization involved developing a list of "ideal" cancer antigen criteria/characteristics, assigning relative weights to those criteria using pairwise comparisons, selecting 75 representative antigens for comparison and ranking, assembling information on the predefined criteria for the selected antigens, and ranking the antigens based on the predefined, preweighted criteria. Using the pairwise approach, the result of criteria weighting, in descending order, was as follows: (a) therapeutic function, (b) immunogenicity, (c) role of the antigen in oncogenicity, (d) specificity, (e) expression level and percent of antigen-positive cells, (f) stem cell expression, (g) number of patients with antigen-positive cancers, (h) number of antigenic epitopes, and (i) cellular location of antigen expression. None of the 75 antigens had all of the characteristics of the ideal cancer antigen. However, 46 were immunogenic in clinical trials and 20 of them had suggestive clinical efficacy in the "therapeutic function" category. These findings reflect the current status of the cancer vaccine field, highlight the possibility that additional organized efforts and funding would accelerate the development of therapeutically effective cancer vaccines, and accentuate the need for prioritization.


Assuntos
Antígenos de Neoplasias/imunologia , Vacinas Anticâncer/imunologia , Neoplasias/imunologia , Desenvolvimento de Programas , Ensaios Clínicos como Assunto , Humanos , National Cancer Institute (U.S.) , Neoplasias/terapia , Projetos Piloto , Estados Unidos
16.
Cancer Epidemiol Biomarkers Prev ; 18(4): 1243-51, 2009 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-19336560

RESUMO

PURPOSE: Ductal lavage has been used for risk stratification and biomarker development and to identify intermediate endpoints for risk-reducing intervention trials. Little is known about patient characteristics associated with obtaining nipple aspirate fluid (NAF) and adequate cell counts (> or =10 cells) in ductal lavage specimens from BRCA mutation carriers. METHODS: We evaluated patient characteristics associated with obtaining NAF and adequate cell counts in ductal lavage specimens from the largest cohort of women from BRCA families yet studied (BRCA1/2 = 146, mutation-negative = 23, untested = 2). Fisher's exact test was used to evaluate categorical variables; Wilcoxon nonparametric test was used to evaluate continuous variables associated with NAF or ductal lavage cell count adequacy. Logistic regression was used to identify independent correlates of NAF and ductal lavage cell count adequacy. RESULTS: From 171 women, 45 (26%) women had NAF and 70 (41%) women had ductal lavage samples with > or =10 cells. Postmenopausal women with intact ovaries compared with premenopausal women [odds ratio (OR), 4.8; P = 0.03] and women without a prior breast cancer history (OR, 5.2; P = 0.04) had an increased likelihood of yielding NAF. Having breast-fed (OR, 3.4; P = 0.001), the presence of NAF before ductal lavage (OR, 3.2; P = 0.003), and being premenopausal (OR, 3.0; P = 0.003) increased the likelihood of ductal lavage cell count adequacy. In known BRCA1/2 mutation carriers, only breast-feeding (OR, 2.5; P = 0.01) and the presence of NAF (OR, 3.0; P = 0.01) were independent correlates of ductal lavage cell count adequacy. CONCLUSIONS: Ductal lavage is unlikely to be useful in breast cancer screening among BRCA1/2 mutation carriers because the procedure fails to yield adequate specimens sufficient for reliable cytologic diagnosis or to support translational research activities.


Assuntos
Neoplasias da Mama/genética , Carcinoma Ductal de Mama/genética , Células Epiteliais/patologia , Genes BRCA1 , Genes BRCA2 , Predisposição Genética para Doença/genética , Testes Genéticos , Mamilos/patologia , Adulto , Biomarcadores Tumorais , Líquidos Corporais/citologia , Neoplasias da Mama/diagnóstico , Carcinoma Ductal de Mama/diagnóstico , Estudos de Coortes , Feminino , Humanos , Pessoa de Meia-Idade , Prognóstico , Fatores de Risco , Irrigação Terapêutica
17.
BMC Med Res Methodol ; 9: 27, 2009 Apr 27.
Artigo em Inglês | MEDLINE | ID: mdl-19397816

RESUMO

BACKGROUND: Physical activity is being studied as a breast cancer prevention strategy. Women at risk of breast cancer report interest in lifestyle modification, but recruitment to randomized physical activity intervention studies is challenging. METHODS: We conducted an analysis of recruitment techniques used for a prospective, randomized pilot study of physical activity in women at risk of breast cancer. We evaluated differences in proportion of eligible patients, enrolled patients, and successful patients identified by each individual recruitment method. The Fisher-Freeman-Halton test (an extension of Fisher's exact test from 2 x 2 tables to general row by column tables) was used to compare the success of different recruitment strategies. RESULTS: We received 352 inquiries from women interested in participating, of whom 171 (54%) were eligible. Ninety-nine women completed a baseline activity evaluation, and 58 (34% of eligible; 16% of total inquiries) were randomized. Recruitment methods fell into three broad categories: media techniques, direct contact with potential participants, and contacts with health care providers. Recruitment strategies differed significantly in their ability to identify eligible women (p = 0.01), and women who subsequently enrolled in the study (p = 0.02). CONCLUSION: Recruitment techniques had varying success. Our data illustrate the challenges in recruiting to behavior modification studies, and provide useful information for tailoring future recruitment efforts for lifestyle intervention trials. TRIAL REGISTRATION NO(S): CDR0000393790, NCI-04-C-0276, NCI-NAVY-B05-001.


Assuntos
Neoplasias da Mama/terapia , Exercício Físico/fisiologia , Seleção de Pacientes , Ensaios Clínicos Controlados Aleatórios como Assunto/métodos , Neoplasias da Mama/patologia , Meios de Comunicação/estatística & dados numéricos , Feminino , Promoção da Saúde/métodos , Humanos , Aceitação pelo Paciente de Cuidados de Saúde/estatística & dados numéricos , Participação do Paciente/estatística & dados numéricos , Reprodutibilidade dos Testes , Fatores de Risco
18.
J Surg Oncol ; 99(6): 319-23, 2009 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-19204954

RESUMO

PURPOSE: The Oncotype Dx Recurrence Score (RS), is often employed in patients with estrogen receptor-positive, node negative (ER+LN-) breast cancer. We investigated the impact of the RS on actual chemotherapy administration and the effect of the assay on a panel of breast oncology experts. PATIENTS AND METHODS: The prospective adjuvant chemotherapy recommendations (prior to RS) and actual adjuvant therapy (after RS) for consecutive patients with ER+LN- breast cancer were recorded. After 6 months and with the same information, a panel of five experts made adjuvant therapy recommendations with and without RS and rated the strength of their recommendations. Rates of panel consensus, recommendation changes, and changes in recommendation strength were compared. RESULTS: There were 29 patients (28 women). RS results altered the plan for chemotherapy in 9 patients (31%); 7 of 13 patients (54%) initially recommended for chemotherapy did not receive it, and 2 of 16 (13%) received chemotherapy following initial recommendations against it. RS results changed the panel's chemotherapy recommendation in 7 patients (24%): 5 of 12 (42%) recommendations for changed to against, and 2 of 17 (12%) recommendations against changed to for chemotherapy. RS increased consensus by the panel 10%, but did not increase the reported strength in chemotherapy recommendations. CONCLUSIONS: RS results were associated with real-world decision changes in 31% of patients and 24% of panel recommendations and increased panel consensus by 10%. However RS did not increase the strength of panelist's recommendations.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Biomarcadores Tumorais/análise , Neoplasias da Mama/química , Neoplasias da Mama/tratamento farmacológico , Perfilação da Expressão Gênica , Recidiva Local de Neoplasia/prevenção & controle , Adulto , Idoso , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Neoplasias da Mama/patologia , Neoplasias da Mama/prevenção & controle , Neoplasias da Mama Masculina/química , Neoplasias da Mama Masculina/tratamento farmacológico , Quimioterapia Adjuvante , Feminino , Humanos , Imuno-Histoquímica , Metástase Linfática , Masculino , Pessoa de Meia-Idade , Projetos Piloto , Estudos Prospectivos , Receptores de Estrogênio/análise , Receptores de Progesterona/análise
19.
Cancer Epidemiol Biomarkers Prev ; 17(7): 1696-701, 2008 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-18583470

RESUMO

BACKGROUND: Mammographic density is a risk factor for breast cancer. Mammographic density and breast magnetic resonance imaging (MRI) volume (MRIV) assess the amount of fibroglandular tissue in the breast. Mammographic density and MRIV can be modulated with hormonal interventions, suggesting that these imaging modalities may be useful as surrogate endpoint biomarkers for breast cancer chemoprevention trials. We evaluated the effect of raloxifene on mammographic density and MRIV in premenopausal women at increased risk for breast cancer. METHODS: Mammograms and MRI were obtained at baseline and after 1 and 2 years of 60 mg raloxifene by mouth daily for 27 premenopausal women. Mammographic percent dense area was calculated using a semiquantitative thresholding technique. T(1)-weighted spoiled gradient-echo MRI with fat suppression was used to determine breast MRIV using a semiautomatic method. Mean change in mammographic density and median change in MRIV were assessed by the Wilcoxon signed-rank test. RESULTS: No significant change in mammographic density was seen after treatment with raloxifene. Mean change after 1 year was 1% [95% confidence interval (95% CI), -3 to +5] and after 2 years was 1% (95% CI, -2 to +5). MRIV decreased on raloxifene. Median relative change in MRIV after 1 year was -17% (95% CI, -28 to -9; P = 0.0017) and after 2 years was -16% (95% CI, -31 to -4; P = 0.0004). CONCLUSIONS: In high-risk premenopausal women, mammographic density did not change on raloxifene, whereas MRIV significantly declined. Our findings suggest that MRIV is a promising surrogate biomarker in premenopausal women at increased risk for breast cancer and should be investigated further in breast cancer prevention trials.


Assuntos
Neoplasias da Mama/diagnóstico , Imageamento por Ressonância Magnética/métodos , Mamografia/métodos , Pré-Menopausa/efeitos dos fármacos , Cloridrato de Raloxifeno/administração & dosagem , Moduladores Seletivos de Receptor Estrogênico/administração & dosagem , Neoplasias da Mama/epidemiologia , Neoplasias da Mama/prevenção & controle , Progressão da Doença , Feminino , Seguimentos , Humanos , Incidência , Prognóstico , Fatores de Risco , Fatores de Tempo
20.
Genet Med ; 9(8): 487-95, 2007 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-17700386

RESUMO

PURPOSE: This study evaluated whether phone results were equivalent to in-person result disclosure for individuals undergoing BRCA1/2 predisposition genetic testing. METHODS: A total of 111 of 136 subjects undergoing education and counseling for BRCA1/2 predisposition genetic testing agreed to randomization to phone or in-person result disclosure. Content and format for both sessions were standardized. Data from the State-Trait Anxiety Inventory and the Psychological General Well-Being index were collected at baseline and then again at 1 week and 3 months after disclosure of test results. Baseline measures were administered after the following had occurred: counseling/education session had been conducted, informed consent had been obtained, and decision to be tested had been made. Satisfaction and cost assessments were administered after the result session. At 1 week, participants were asked their preferred method of result disclosure. RESULTS: There were no differences in anxiety and general well-being measures between 50 phone and 52 in-person results disclosure. Both groups reported similar rates of satisfaction with services. Among those with a preference, 77% preferred the notification method assigned. There was a statistically significant preference for phone results among the 23% who did not prefer the method assigned. Greater costs were associated with in-person result disclosure. CONCLUSIONS: These data suggest that phone results are a reasonable alternative to traditional in-person BRCA1/2 genetic test disclosure without any negative psychologic outcomes or compromise in knowledge. However, further study is needed in a more clinically representative population to confirm these findings.


Assuntos
Proteína BRCA1/genética , Proteína BRCA2/genética , Aconselhamento Genético , Predisposição Genética para Doença , Telefone , Adulto , Idoso , Ansiedade/etiologia , Ansiedade/psicologia , Proteínas Reguladoras de Apoptose , Feminino , Predisposição Genética para Doença/psicologia , Humanos , Masculino , Pessoa de Meia-Idade , Satisfação do Paciente
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...