Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 197
Filtrar
Mais filtros

Base de dados
País/Região como assunto
Tipo de documento
Intervalo de ano de publicação
1.
Breast Cancer Res Treat ; 185(3): 647-655, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33226492

RESUMO

PURPOSE: Prediction of response to primary endocrine therapy (PET) in older women is based on measurement of oestrogen receptor (ER), progesterone receptor (PgR) and human epidermal growth factor (HER)-2. This study uses a unique method for construction of core needle biopsy (CNB) tissue microarray (TMA), to correlate expression of a panel of 17 biomarkers with clinical outcome, in patients receiving PET. METHODS: Over 37 years (1973-2010), 1758 older (≥ 70 years) women with operable primary breast cancer were managed in a single institution. Of these, 693 had sufficient good-quality CNB to construct TMA, of which 334 had ER-positive tumours treated by PET with a minimum of 6-month follow-up. A panel of biomarkers was measured by immunohistochemistry (ER, PgR, HER2, Ki-67, p53, CK5/6, CK 7/8, EGFR, BCL-2, MUC1, VEGF, LKB1, BRCA1, HER3, HER4, PTEN and AIB1). Expression of each biomarker was dichotomised into 'low' or 'high' based on breast cancer-specific survival (BCSS). RESULTS: From the panel of biomarkers, multivariate analysis showed: High ER (p = 0.003) and PgR (p = 0.002) were associated with clinical benefit of PET at 6 months, as opposed to progressive disease. High ER (p = 0.0023), PgR (p < 0.001) and BCL-2 (p = 0.043) and low LKB1 (p = 0.022) were associated with longer time to progression. High PgR (p < 0.001) and low MUC1 (p = 0.021) were associated with better BCSS. Expression of other biomarkers did not show any significant correlation. CONCLUSIONS: In addition to ER and PgR; MUC1, BCL-2 and LKB1 are important in determining the outcome of PET in this cohort.


Assuntos
Neoplasias da Mama , Idoso , Biomarcadores Tumorais , Biópsia com Agulha de Grande Calibre , Mama , Neoplasias da Mama/tratamento farmacológico , Fator de Crescimento Epidérmico , Feminino , Humanos , Receptor ErbB-2 , Receptores de Estrogênio , Receptores de Progesterona/genética
2.
Br J Surg ; 108(3): 315-325, 2021 04 05.
Artigo em Inglês | MEDLINE | ID: mdl-33760065

RESUMO

BACKGROUND: Primary endocrine therapy may be an alternative treatment for less fit women with oestrogen receptor (ER)-positive breast cancer. This study compared quality-of-life (QoL) outcomes in older women treated with surgery or primary endocrine therapy. METHODS: This was a multicentre, prospective, observational cohort study of surgery or primary endocrine therapy in women aged over 70 years with operable breast cancer. QoL was assessed using European Organisation for Research and Treatment of cancer QoL questionnaires QLQ-C30, -BR23, and -ELD14, and the EuroQol Five Dimensions 5L score at baseline, 6 weeks, and 6, 12, 18, and 24 months. Propensity score matching was used to adjust for baseline variation in health, fitness, and tumour stage. RESULTS: The study recruited 3416 women (median age 77 (range 69-102) years) from 56 breast units. Of these, 2979 (87.2 per cent) had ER-positive breast cancer; 2354 women had surgery and 500 received primary endocrine therapy (125 were excluded from analysis due to inadequate data or non-standard therapy). Median follow-up was 52 months. The primary endocrine therapy group was older and less fit. Baseline QoL differed between the groups; the mean(s.d.) QLQ-C30 global health status score was 66.2(21.1) in patients who received primary endocrine therapy versus 77.1(17.8) among those who had surgery plus endocrine therapy. In the unmatched analysis, changes in QoL between 6 weeks and baseline were noted in several domains, but by 24 months most scores had returned to baseline levels. In the matched analysis, major surgery (mastectomy or axillary clearance) had a more pronounced adverse impact than primary endocrine therapy in several domains. CONCLUSION: Adverse effects on QoL are seen in the first few months after surgery, but by 24 months these have largely resolved. Women considering surgery should be informed of these effects.


Assuntos
Antineoplásicos Hormonais/uso terapêutico , Neoplasias da Mama/terapia , Qualidade de Vida , Idoso , Idoso de 80 Anos ou mais , Neoplasias da Mama/metabolismo , Neoplasias da Mama/psicologia , Feminino , Humanos , Estudos Longitudinais , Mastectomia , Estudos Prospectivos , Receptores de Estrogênio/metabolismo
3.
Br J Surg ; 108(5): 499-510, 2021 05 27.
Artigo em Inglês | MEDLINE | ID: mdl-33760077

RESUMO

BACKGROUND: Rates of surgery and adjuvant therapy for breast cancer vary widely between breast units. This may contribute to differences in survival. This cluster RCT evaluated the impact of decision support interventions (DESIs) for older women with breast cancer, to ascertain whether DESIs influenced quality of life, survival, decision quality, and treatment choice. METHODS: A multicentre cluster RCT compared the use of two DESIs against usual care in treatment decision-making in older women (aged at least ≥70 years) with breast cancer. Each DESI comprised an online algorithm, booklet, and brief decision aid to inform choices between surgery plus adjuvant endocrine therapy versus primary endocrine therapy, and adjuvant chemotherapy versus no chemotherapy. The primary outcome was quality of life. Secondary outcomes included decision quality measures, survival, and treatment choice. RESULTS: A total of 46 breast units were randomized (21 intervention, 25 usual care), recruiting 1339 women (670 intervention, 669 usual care). There was no significant difference in global quality of life at 6 months after the baseline assessment on intention-to-treat analysis (difference -0.20, 95 per cent confidence interval (C.I.) -2.69 to 2.29; P = 0.900). In women offered a choice of primary endocrine therapy versus surgery plus endocrine therapy, knowledge about treatments was greater in the intervention arm (94 versus 74 per cent; P = 0.003). Treatment choice was altered, with a primary endocrine therapy rate among women with oestrogen receptor-positive disease of 21.0 per cent in the intervention versus 15.4 per cent in usual-care sites (difference 5.5 (95 per cent C.I. 1.1 to 10.0) per cent; P = 0.029). The chemotherapy rate was 10.3 per cent at intervention versus 14.8 per cent at usual-care sites (difference -4.5 (C.I. -8.0 to 0) per cent; P = 0.013). Survival was similar in both arms. CONCLUSION: The use of DESIs in older women increases knowledge of breast cancer treatment options, facilitates shared decision-making, and alters treatment selection. Trial registration numbers: EudraCT 2015-004220-61 (https://eudract.ema.europa.eu/), ISRCTN46099296 (http://www.controlled-trials.com).


Assuntos
Neoplasias da Mama/terapia , Tomada de Decisões , Técnicas de Apoio para a Decisão , Idoso , Idoso de 80 Anos ou mais , Antineoplásicos Hormonais/uso terapêutico , Neoplasias da Mama/mortalidade , Quimioterapia Adjuvante , Feminino , Conhecimentos, Atitudes e Prática em Saúde , Humanos , Qualidade de Vida
4.
Hong Kong Med J ; 24(2): 128-136, 2018 04.
Artigo em Inglês | MEDLINE | ID: mdl-29622760

RESUMO

INTRODUCTION: Frontline health care professionals in Hong Kong may encounter high refusal rates for the Hospital Authority's Smoking Counselling and Cessation Programme (SCCP) when smokers know it is subject to a service charge. We compared SCCP booking and attendance rates among smokers with or without a financial incentive. METHODS: In this multicentre non-randomised cluster-controlled trial, adult smokers who attended one of six general out-patient clinics between November 2015 and April 2016 were invited to join an SCCP. Attendees in the three intervention-group centres but not the three control-group centres received a supermarket coupon to offset the service charge. RESULTS: A total of 173 smokers aged 18 years or older (92 in the intervention group and 81 in the control group) were recruited into the study. In the intervention group, 47 smokers (51%) agreed via a questionnaire that they would join the SCCP, compared with only 23 smokers in the control group (28%). The booking rates were 83% (n=39) in the intervention group and 83% (n=19) in the control group. Among those who had booked a place, 19 (49%) intervention-group participants and 11 (58%) control-group participants attended an SCCP session. Multivariable logistic regression revealed that offering a coupon was associated with agreeing to join an SCCP (odds ratio=4.963, 95% confidence interval=2.173-11.334; P<0.001) and booking an SCCP place (odds ratio=4.244, 95% confidence interval=1.838-9.799; P<0.001). CONCLUSION: Provision of a financial incentive was positively associated with agreement to join an SCCP and booking an SCCP place. Budget holders should consider providing the SCCP free of charge to increase smokers' access to the service.


Assuntos
Motivação , Abandono do Hábito de Fumar/economia , Adulto , Idoso , Feminino , Humanos , Modelos Logísticos , Masculino , Pessoa de Meia-Idade , Recompensa
5.
Diabet Med ; 33(8): 1013-25, 2016 08.
Artigo em Inglês | MEDLINE | ID: mdl-26577885

RESUMO

AIM: To identify the relationship between HbA1c and cancers in people with or without diabetes. BACKGROUND: Cancer is a major public health problem, accounting for 8.2 million deaths worldwide in 2012. HbA1c level has been associated with the risk of developing certain cancers, although the existing evidence is conflicting. METHODS: EMBASE, MEDLINE, CINAHL and the Cochrane Library were searched. Eligible articles included randomized controlled trials, cohort studies, case-control studies, systematic reviews and meta-analyses. Participants of either sex, with or without Type 1 or 2 diabetes, were included. The studies were assessed using the Scottish Intercollegiate Guidelines Network (SIGN) criteria by two independent assessors. No meta-analysis was performed because of the heterogeneity of results. RESULTS: A total of 19 studies from 1006 met the inclusion criteria, of which 14 were cohort studies and five were nested case-control studies. Eight studies investigated outcomes for all cancer sites. Four of these studies reported that higher HbA1c levels were associated with higher incidence and/or mortality risk for all cancers. One study observed a U-shaped relationship between HbA1c and cancer incidence and mortality. Increasing HbA1c levels were associated with increasing risk of developing colorectal, pancreatic, respiratory and female genital tract cancers. No increased risk was observed for breast cancer, gastrointestinal or urological malignancies. CONCLUSION: HbA1c appears to be associated with cancer incidence and/or cancer mortality, but further studies are needed to fully understand the complex relationship between HbA1c and cancer.


Assuntos
Diabetes Mellitus/epidemiologia , Hemoglobinas Glicadas/metabolismo , Neoplasias/epidemiologia , Estudos de Casos e Controles , Neoplasias Colorretais/epidemiologia , Neoplasias Colorretais/metabolismo , Neoplasias Colorretais/mortalidade , Diabetes Mellitus/metabolismo , Feminino , Neoplasias dos Genitais Femininos/epidemiologia , Neoplasias dos Genitais Femininos/metabolismo , Neoplasias dos Genitais Femininos/mortalidade , Humanos , Incidência , Masculino , Neoplasias/metabolismo , Neoplasias/mortalidade , Neoplasias Pancreáticas/epidemiologia , Neoplasias Pancreáticas/metabolismo , Neoplasias Pancreáticas/mortalidade , Prognóstico , Neoplasias do Sistema Respiratório/epidemiologia , Neoplasias do Sistema Respiratório/metabolismo , Neoplasias do Sistema Respiratório/mortalidade
6.
Ann Oncol ; 25(4): 837-842, 2014 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-24667716

RESUMO

INTRODUCTION: There is dearth of literature reporting the prevalence and biological characteristics as well as the long-term clinical outcome of human epidermal growth factor receptor-2 (HER2) overexpressing tumours in older women. Currently, research involving trastuzumab at large focuses on the younger population. This study aimed to analyse their biological characteristics and to compare them with their younger counterparts from a single centre with a long-term clinical follow-up. METHODS: Over 37 years (1973-2010), 1758 older (≥70 years) women with early operable (<5 cm) primary breast cancer were managed in a dedicated clinic and have complete clinical information available. Of these, 813 patients underwent primary surgery and 575 had good quality tumour samples available for tissue microarray analysis using indirect immunohistochemistry. Comparison was made with data from a well-characterised younger (<70 years) series (N = 1711) treated between 1986 and 1998 (before adjuvant trastuzumab became standard) in our institution. Forty five (7.6%) and 140 (8.2%) patients from the older and younger series, respectively, had HER2-positive tumours. RESULTS: HER2 overexpression was seen in 45 (7.6%) older women and 140 (8.2%) in younger patients (P = 0.56). HER2 overexpressing tumours in older women when compared with that in their younger counterparts were associated with low Ki67 and high bcl2 expression (P < 0.05). Only 26% of the younger patients and none of the older patients received adjuvant chemotherapy, and no patients at the time received trastuzumab. However, there was no significant difference in the outcome of the two age groups (5-year breast cancer-specific survival rate: <70 years = 65% versus >70 years = 70%, P = 0.51). CONCLUSION: HER2 overexpressing tumours in older women showed relatively a less aggressive phenotype and did not show any inferior long-term clinical outcome despite not having received chemotherapy when compared with the younger patients. The precise role of different adjuvant systemic therapies in this population needs to be delineated.


Assuntos
Fatores Etários , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/genética , Receptor ErbB-2/genética , Adulto , Idoso , Idoso de 80 Anos ou mais , Anticorpos Monoclonais Humanizados/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica , Neoplasias da Mama/patologia , Neoplasias da Mama/cirurgia , Feminino , Regulação Neoplásica da Expressão Gênica , Humanos , Pessoa de Meia-Idade , Taxa de Sobrevida , Trastuzumab , Resultado do Tratamento
7.
Breast Cancer Res Treat ; 147(3): 671-4, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-25148877

RESUMO

Ductal carcinoma is the commonest histological type found in invasive breast carcinomas and may be associated with worse prognosis, when compared to non-ductal carcinoma. Older patients tend to display more favourable tumour biology than younger patients. This study aimed to investigate the significance of histological type and its relationship with clinical outcome in the older group. A total of 808 older (≥70 years) women with early operable primary breast cancer underwent surgery as their primary treatment, followed by optimal adjuvant therapies, in the Nottingham Breast Unit between 1973 and 2009. The histological types of the surgical specimens were reviewed and compared with those in a previously characterised younger (<70 years) series (N = 1,733), in terms of distribution and correlation with clinical outcome. Ductal type was associated with a significantly worse clinical outcome when compared to non-ductal type in the older group in terms of 10-year rates of metastasis-free survival (75 vs 79 %, p = 0.028) and overall survival (44 vs 52 %; p = 0.015). Similar worse clinical outcome was found with the ductal type in the younger group in terms of 10-year rates of metastasis-free survival (65 vs 79 %; p = 0.001) and overall survival (60 vs 78 %; p = 0.001). For all patients with ductal type carcinomas, the older series showed significantly better 10-year metastasis-free survival (75 vs 65 %, p < 0.001) and breast cancer-specific survival (75 vs 69 %, p = 0.025) when compared to the younger series. In both old and the young, ductal cancers were associated with poor survival outcome when compared to non-ductal cancers. When compared to their younger counterparts, older patients with ductal type carcinomas had better metastasis-free and breast cancer-specific survival rates (their lower overall survival was likely to be due to death from other causes), despite having a lower likelihood of receiving adjuvant systemic therapy.


Assuntos
Neoplasias da Mama/mortalidade , Neoplasias da Mama/patologia , Carcinoma Ductal de Mama/mortalidade , Carcinoma Ductal de Mama/patologia , Adolescente , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Pessoa de Meia-Idade , Taxa de Sobrevida , Resultado do Tratamento , Reino Unido/epidemiologia , Adulto Jovem
8.
Br J Cancer ; 108(5): 1042-51, 2013 Mar 19.
Artigo em Inglês | MEDLINE | ID: mdl-23462719

RESUMO

BACKGROUND: As age advances breast cancer appears to change its biological characteristics, however, very limited data are available to define the precise differences between older and younger patients. METHODS: Over 36 years (1973-2009), 1758 older (≥70 years) women with early operable primary breast cancer were managed in a dedicated clinic. In all, 813 underwent primary surgery and 575 good quality tumour samples were available for biological analysis. The pattern of biomarkers was analysed using indirect immunohistochemistry on tissue microarrays. Comparison was made with a previously characterised series of younger (<70 years) patients. RESULTS: There was high expression of oestrogen receptor (ER), PgR, Bcl2, Muc1, BRCA1 and 2, E-cadherin, luminal cytokeratins, HER3, HER4, MDM2 and 4 and low expression of human epidermal growth factor receptor (HER)-2, Ki67, p53, EGFR and CK17. Oestrogen receptor and axillary stage appeared as independent prognostic factors. Unsupervised partitional clustering showed six biological clusters in older patients, five of which were common in the younger patients, whereas the low ER luminal cluster was distinct in the older series. The luminal phenotype showed better breast cancer-specific survival, whereas basal and HER2-overexpressing tumours were associated with poor outcome. CONCLUSION: Early operable primary breast cancer in older women appears as a distinct biological entity, with existence of a novel cluster. Overall older women showed less aggressive tumour biology and ER appeared as an independent prognostic factor alongside the time-dependent axillary stage. These biological characteristics may explain the differences in clinical outcome and should be considered in making therapeutic decisions.


Assuntos
Biomarcadores Tumorais/metabolismo , Neoplasias da Mama/metabolismo , Neoplasias da Mama/cirurgia , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Neoplasias da Mama/mortalidade , Neoplasias da Mama/patologia , Intervalo Livre de Doença , Feminino , Humanos , Pessoa de Meia-Idade , Prognóstico , Resultado do Tratamento
9.
Eur J Neurosci ; 38(7): 3071-9, 2013 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23834742

RESUMO

Consolidation of motor memories associated with skilled practice can occur both online, concurrent with practice, and offline, after practice has ended. The current study investigated the role of dorsal premotor cortex (PMd) in early offline motor memory consolidation of implicit sequence-specific learning. Thirty-three participants were assigned to one of three groups of repetitive transcranial magnetic stimulation (rTMS) over left PMd (5 Hz, 1 Hz or control) immediately following practice of a novel continuous tracking task. There was no additional practice following rTMS. This procedure was repeated for 4 days. The continuous tracking task contained a repeated sequence that could be learned implicitly and random sequences that could not. On a separate fifth day, a retention test was performed to assess implicit sequence-specific motor learning of the task. Tracking error was decreased for the group who received 1 Hz rTMS over the PMd during the early consolidation period immediately following practice compared with control or 5 Hz rTMS. Enhanced sequence-specific learning with 1 Hz rTMS following practice was due to greater offline consolidation, not differences in online learning between the groups within practice days. A follow-up experiment revealed that stimulation of PMd following practice did not differentially change motor cortical excitability, suggesting that changes in offline consolidation can be largely attributed to stimulation-induced changes in PMd. These findings support a differential role for the PMd in support of online and offline sequence-specific learning of a visuomotor task and offer converging evidence for competing memory systems.


Assuntos
Memória/fisiologia , Córtex Motor/fisiologia , Destreza Motora/fisiologia , Aprendizagem Seriada/fisiologia , Estimulação Magnética Transcraniana/métodos , Adulto , Conscientização , Feminino , Mãos , Humanos , Masculino , Adulto Jovem
10.
Ann Oncol ; 23(9): 2296-2300, 2012 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-22357257

RESUMO

BACKGROUND: Long-term analysis of a randomised trial in Nottingham comparing tamoxifen versus surgery as initial treatment demonstrated that in oestrogen receptor (ER)-unselected cases, surgery achieved better local control, with no difference in overall survival. It was suggested that for patients with ER-rich tumours, local control and survival may be comparable. We now present long-term follow-up of a randomised trial designed to address this clinical scenario. PATIENTS AND METHODS: One hundred and fifty three fit elderly (≥70 years) women with clinically node-negative primary invasive breast carcinoma <5 cm of high ER content [histochemical (H) score ≥100] were randomised 2:1 to primary tamoxifen (Tam) (N = 100) or mastectomy with adjuvant tamoxifen (Mx + Tam) (N = 53). RESULTS: With median follow-up of 78 months, there was no statistically significant difference in 10-year rates of regional recurrence (9.0% versus 7.5%), metastasis (8.0% versus 13.2%), breast cancer-specific survival (89.0% versus 86.8%) or overall survival (64.0% versus 66.0%) between Tam and Mx + Tam; however, local control was inferior with Tam (local failure rates 43.0% versus 1.9%; P < 0.001). CONCLUSION: Irrespective of the degree of ER positivity, surgery achieved better local control. However, there was excellent and similar survival in both groups. Tam could be considered in those who are 'frail', refuse or prefer not to initially undergo surgery.


Assuntos
Antineoplásicos Hormonais/uso terapêutico , Neoplasias da Mama/terapia , Carcinoma/terapia , Neoplasias Hormônio-Dependentes/tratamento farmacológico , Receptores de Estrogênio/metabolismo , Tamoxifeno/uso terapêutico , Idoso , Neoplasias da Mama/metabolismo , Neoplasias da Mama/mortalidade , Neoplasias da Mama/patologia , Carcinoma/metabolismo , Carcinoma/mortalidade , Carcinoma/patologia , Quimioterapia Adjuvante , Feminino , Seguimentos , Humanos , Mastectomia , Invasividade Neoplásica , Neoplasias Hormônio-Dependentes/mortalidade , Estatísticas não Paramétricas , Resultado do Tratamento
11.
Ann Oncol ; 23(6): 1465-71, 2012 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-22003241

RESUMO

BACKGROUND: A dedicated clinic for older women with early primary breast cancer, established in 1973, has recently evolved into a combined surgical/oncology facility. This study aimed to compare the clinical outcome across these periods. METHODS: From 1973 to 2010, 1758 women were managed. Analysis was carried out based on retrospective review and continued update of patient records. RESULTS: In the recent decade, 56.3% had surgery, followed by primary endocrine therapy (PET; 41.1%) and primary radiotherapy (1.5%). Before 1999, 42.8%, 55.6% and 1% of patients had surgery, PET and primary radiotherapy, respectively. The use of adjuvant endocrine therapy and radiotherapy has increased from 33.6% to 54.9% and 5.8% to 34.6%, respectively. A significant improvement was seen in the annual rates of local (2.2% versus 0.5%, P < 0.001), regional (1.8% versus 0.4%, P < 0.001) and distant (2.9% versus 1.9%, P = 0.002) recurrences. Similarly, the 5-year breast cancer-specific and overall survival rates showed improvement [81% versus 91% (P < 0.001) and 56% versus 71% (P < 0.001), respectively]. CONCLUSIONS: In the recent decade, while surgery became the predominant treatment, a significant proportion of patients had non-operative therapies, selection of which was based on multidisciplinary assessment in the clinic. This management approach appears to produce excellent clinical outcome, which is significantly better than that in earlier period.


Assuntos
Neoplasias da Mama/terapia , Institutos de Câncer , Mastectomia , Recidiva Local de Neoplasia , Idoso , Idoso de 80 Anos ou mais , Antineoplásicos Hormonais/uso terapêutico , Neoplasias da Mama/mortalidade , Neoplasias da Mama/patologia , Terapia Combinada , Feminino , Seguimentos , Humanos , Estimativa de Kaplan-Meier , Metástase Linfática
12.
Arch Toxicol ; 86(5): 741-52, 2012 May.
Artigo em Inglês | MEDLINE | ID: mdl-22349056

RESUMO

Polyphyllin D (PD) is a potent anticancer agent isolated from a traditional medicinal herb Paris polyphylla that has been used in China for many years to treat cancer. PD is not a substrate of p-glycoprotein, and it can bypass the multi-drug resistance in cancer cell line R-HepG2. However, the effect of PD on the induction of cell death in human erythrocytes remains unknown. Given that PD is a small molecule that can depolarize the mitochondrial membrane potential and release apoptosis-inducing factor (AIF) in isolated mitochondria, we hypothesized that the apoptogenic effect of PD in human erythrocytes devoid of mitochondria would be minimal. This study therefore tried to evaluate the in vitro effect of PD on hemolysis and apoptosis in human erythrocytes. Apoptosis in human red blood cells (RBCs), also known as eryptosis or erythroptosis, after PD treatment was determined by flow cytometry and confocal microscopy for the phosphatidyl-serine externalization and other apoptosis feature events. False to our prediction, PD caused hemolysis and eryptosis/erythroptosis in human RBCs. Mechanistically, elevation in the cytosolic Ca²âº ion level seems to be a key but not the only mediator in the PD-mediated eryptosis/erythroptosis because depletion of the external Ca²âº could not eliminate the PD effect. Also, PD was able to permeabilize the membrane of RBC ghosts in a way similar to digitonin. Taken together, we report here for the first time the toxicity of PD in human RBCs as well as its underlying mechanism for the hemolysis and eryptosis/erythroptosis.


Assuntos
Apoptose/efeitos dos fármacos , Permeabilidade da Membrana Celular/efeitos dos fármacos , Diosgenina/análogos & derivados , Eritrócitos/efeitos dos fármacos , Cálcio/metabolismo , Caspase 3/metabolismo , Tamanho Celular/efeitos dos fármacos , Células Cultivadas , Citosol/efeitos dos fármacos , Citosol/metabolismo , Diosgenina/farmacologia , Diosgenina/toxicidade , Eritrócitos/metabolismo , Eritrócitos/patologia , Humanos , Membranas Mitocondriais/efeitos dos fármacos , Saponinas
13.
Br J Cancer ; 104(9): 1393-400, 2011 Apr 26.
Artigo em Inglês | MEDLINE | ID: mdl-21448163

RESUMO

INTRODUCTION: A Cochrane review of seven randomised trials (N=1571) comparing surgery and primary endocrine therapy (PET) (oestrogen receptor (ER) unselected) shows no difference in overall survival (OS). We report outcome of a large series with ER-positive (ER+) early invasive primary breast cancer. METHODS: Between 1973 and 2009, 1065 older (≥ 70 years) women (median age 78 years (70-99)) had either surgery (N=449) or PET (N=616) as initial treatment. RESULTS: At 49-month median follow-up (longest 230 months), the 5-year breast cancer-specific survival (BCSS) and OS were 90 and 62%, respectively. Majority (74.2%) died from causes other than breast cancer. The rates (per annum) of local/regional recurrence (<1%) (following surgery), contralateral tumour (<1%) and metastases (<3%) were low. For patients on PET, 97.9% achieved clinical benefit (CB) at 6 months, with median time to progression of 49 months (longest 132 months) and significantly longer BCSS when compared with those who progressed (P<0.001). All patients with strongly ER+ (H-score >250) tumours achieved CB and had better BCSS (P<0.01). Patients with tumours having an H-score >250 were found to have equivalent BCSS regardless of treatment (surgery or PET; P=0.175), whereas for those with H-score ≤ 250, surgery produced better outcome (P<0.001). CONCLUSION: Older women with ER+ breast cancer appear to have excellent long-term outcome regardless of initial treatment. Majority also die from non-breast cancer causes. Although surgery remains the treatment of choice, patients with ER-rich (H-score >250) tumours tend to do equally well when treated by PET. This should be taken into account when therapies are considered.


Assuntos
Antineoplásicos Hormonais/uso terapêutico , Biomarcadores Tumorais/análise , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/cirurgia , Receptores de Estrogênio/análise , Idoso , Idoso de 80 Anos ou mais , Neoplasias da Mama/química , Neoplasias da Mama/patologia , Causas de Morte , Estudos de Coortes , Feminino , Humanos , Estimativa de Kaplan-Meier , Invasividade Neoplásica , Recidiva Local de Neoplasia/prevenção & controle , Fatores de Tempo , Resultado do Tratamento
14.
World J Surg Oncol ; 9: 101, 2011 Sep 09.
Artigo em Inglês | MEDLINE | ID: mdl-21906312

RESUMO

BACKGROUND: It has been shown in in-vitro experiments that "withdrawal" of tamoxifen inhibits growth of tumor cells. However, evidence is scarce when this is extrapolated into clinical context. We report our experience to verify the clinical relevance of "withdrawal therapy". METHODS: Breast cancer patients since 1998 who fulfilled the following criteria were selected from the departmental database and the case-notes were retrospectively reviewed: (1) estrogen receptor positive, operable primary breast cancer in elderly (age > 70 years), locally advanced or metastatic breast cancer; (2) disease deemed suitable for treatment by hormonal manipulation; (3) disease assessable by UICC criteria; (4) received "withdrawal" from a prior endocrine agent as a form of therapy; (5) on "withdrawal therapy" for ≥ 6 months unless they progressed prior. RESULTS: Seventeen patients with median age of 84.3 (53.7-92.5) had "withdrawal therapy" as second to tenth line of treatment following prior endocrine therapy using tamoxifen (n = 10), an aromatase inhibitor (n = 5), megestrol acetate (n = 1) or fulvestrant (n = 1). Ten patients (58.8%) had clinical benefit (CB) (complete response/partial response/stable disease ≥ 6 months) with a median duration of Clinical Benefit (DoCB) of 10+ (7-27) months. Two patients remain on "withdrawal therapy" at the time of analysis. CONCLUSION: "Withdrawal therapy" appears to produce sustained CB in a significant proportion of patients. This applies not only to "withdrawal" from tamoxifen, but also from other categories of endocrine agents. "Withdrawal" from endocrine therapy is, therefore, a viable intercalating option between endocrine agents to minimise resistance and provide additional line of therapy. It should be considered as part of the sequencing of endocrine therapy.


Assuntos
Neoplasias da Mama/terapia , Resistencia a Medicamentos Antineoplásicos/efeitos dos fármacos , Moduladores de Receptor Estrogênico/uso terapêutico , Receptores de Estrogênio/sangue , Terapia de Salvação/métodos , Idoso , Idoso de 80 Anos ou mais , Antineoplásicos Hormonais/uso terapêutico , Neoplasias da Mama/diagnóstico , Neoplasias da Mama/metabolismo , Feminino , Seguimentos , Humanos , Pessoa de Meia-Idade , Receptores de Estrogênio/antagonistas & inibidores , Estudos Retrospectivos , Tamoxifeno/uso terapêutico , Resultado do Tratamento
15.
Eur J Surg Oncol ; 47(8): 1891-1899, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-33875285

RESUMO

Primary endocrine therapy as treatment of breast cancer is only recommended in older women with limited life expectancy. However, many older women opt for endocrine therapy due to concerns regarding frailty and potential decline in function after surgery. A decline in functional status after surgery is documented in some cancer types, such as colorectal, however, the full impact of breast cancer surgery is less understood. A systematic review was performed to examine the evidence for impact of breast cancer surgery on functional status in older women. PubMed and Embase databases were searched. Studies were eligible if performed within the last 10 years; included patients over the age of 65 years undergoing breast cancer surgery; included stratification of results by age; measured functional status pre-operatively and at least six months following surgery. A total of 11 studies including 12 030 women were appraised. Two studies represented level-II and nine level-IV evidence. Overall, physical activity level was negatively impacted by breast cancer surgery and this was compounded by the extent of surgery. Evidence for impact of breast cancer surgery on quality of life, fatigue and cognition, was conflicting. The possibility of decline in functional status after breast cancer surgery should be discussed in all older women considering surgery. A structured exercise program may improve the negative effects of surgery on physical activity. Further work is required in the areas of quality of life, fatigability and cognition.


Assuntos
Atividades Cotidianas , Neoplasias da Mama/cirurgia , Exercício Físico , Estado Funcional , Complicações Cognitivas Pós-Operatórias/epidemiologia , Complicações Pós-Operatórias/epidemiologia , Qualidade de Vida , Idoso , Axila , Fadiga/epidemiologia , Fadiga/fisiopatologia , Feminino , Humanos , Excisão de Linfonodo , Mastectomia , Mastectomia Segmentar , Complicações Cognitivas Pós-Operatórias/fisiopatologia , Complicações Pós-Operatórias/fisiopatologia
16.
Breast Cancer ; 28(5): 991-1001, 2021 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-34165702

RESUMO

PURPOSE: There are numerous biomarkers which may have potential predictive and prognostic significance in breast cancer. This is extremely important in older adults, who may opt for less aggressive therapy. This work outlines the literature on biological assessment outside of standard biomarkers (defined as ER, PgR, HER2, Ki67) in women ≥ 65 years with primary operable invasive breast cancer, to determine which additional biomarkers are relevant to outcome in older women. METHODS: Medline and Embase databases were searched. Studies were eligible if included ≥ 50 patients aged ≥ 65 years; stratified results by age; measured a biomarker outside of standard assay and reported patient data. RESULTS: A total of 12 studies were appraised involving 5000 patients, measuring 28 biomarkers. The studies were extremely varied in methodology and outcome but three themes emerged: 1. Differences in biomarker expression between younger and older women, indicating that breast cancer in older women is generally less aggressive compared to younger women; 2. Relationship of biomarker expression with survival, suggesting biomarkers which may exclusively predict response to primary treatment in older women; 3. Association of biomarker with chemotherapy, suggesting that older patients should not be declined chemotherapy based on age alone. CONCLUSION: There is evidence to support further investigation of B-cell lymphoma (BCL2), liver kinase (LK)B1, epidermal growth factor receptor (EGFR), cytoplasmic cyclin-E, mucin (MUC)1 and cytokeratins (CKs) as potential predictive or prognostic markers in older women with breast cancer undergoing surgery. Studies exploring these biomarkers in larger cohorts and in women undergoing non-operative therapies are required.


Assuntos
Biomarcadores Tumorais/metabolismo , Neoplasias da Mama/metabolismo , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Protocolos Antineoplásicos , Neoplasias da Mama/mortalidade , Feminino , Humanos
17.
Hong Kong Med J ; 16(2): 137-40, 2010 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-20354249

RESUMO

Brain abscesses are uncommon in children. We report a 3-year-old, previously healthy and immunocompetent boy, with an Absidia brain abscess. He presented with decreased sensorium and status epilepticus. The brain abscess was detected using cranial computed tomography and magnetic resonance imaging, and the diagnosis was confirmed with pus and brain tissue cultures. The patient responded to surgical drainage with concomitant intravenous and intraventricular amphotericin B.


Assuntos
Anfotericina B/uso terapêutico , Abscesso Encefálico/terapia , Mucormicose/tratamento farmacológico , Absidia/isolamento & purificação , Anfotericina B/administração & dosagem , Antifúngicos/administração & dosagem , Antifúngicos/uso terapêutico , Abscesso Encefálico/diagnóstico , Abscesso Encefálico/microbiologia , Pré-Escolar , Drenagem/métodos , Humanos , Imunocompetência , Injeções Intraventriculares , Masculino , Mucormicose/microbiologia
18.
Minerva Chir ; 65(5): 555-68, 2010 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-21081867

RESUMO

Although surgery has long been considered the main form of curative treatment for breast cancer, its use in older women may not always be indicated. Whilst surgery has been shown to provide superior local control for breast cancer, there is conflicting evidence on whether surgery offers a significant improvement on overall survival in these patients. The more indolent tumour biology commonly seen in older women with breast cancer, coupled with competing causes of death may alter the goals of treatment. The differing needs of older patients should be thoroughly assessed to consider their comorbidities, functional status and quality of life. A comprehensive geriatric assessment and quality of life assessment could identify pretreatment risk factors and guide clinical decision making, improving morbidity and prognosis. Alternatives to surgery include primary endocrine therapy and primary radiotherapy. Further research is required to identify different patient or tumour factors which can be used to individualize treatment for breast cancer in older women and to develop holistic assessment tools which take into account their individual quality of life, geriatric syndromes and functional needs. A dedicated multidisciplinary-led clinic may provide a suitable platform for the assessment, review and management of this distinctive set of patients.


Assuntos
Neoplasias da Mama/cirurgia , Pesquisa Biomédica/tendências , Neoplasias da Mama/terapia , Feminino , Previsões , Humanos
19.
Breast Cancer Res Treat ; 113(2): 403-7, 2009 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-18311583

RESUMO

INTRODUCTION: There are trials comparing different neoadjuvant chemotherapy regimens for locally advanced primary breast cancer (LAPC). Few studies have evaluated alternative therapeutic approaches towards LAPC. A previous trial from our institute in LAPC patients unselected for oestrogen receptor (ER) status, comparing primary endocrine therapy versus multimodal treatment, showed no difference in breast cancer related deaths or overall survival. We report our experience of primary endocrine therapy in ER+ LAPC. METHODS: Between 1988 and 2007, 195 ER+, non-inflammatory LAPC patients were treated with primary endocrine agents in our institute, due to patient choice, being unfit for chemotherapy, or recruitment into the above mentioned trial. All patients had disease assessable by UICC criteria. RESULTS: Median age was 69 years. The median follow-up was 61 months. 154 patients (79%) received endocrine treatment alone. 185 patients (95%) derived clinical benefit (complete response/ partial response/ stable disease) for > or =6 months from primary endocrine therapy. Overall 5-year survival was 76% and 5-year breast cancer specific survival was 86%. CONCLUSION: In selected group of ER+ LAPC patients, primary endocrine treatment achieves excellent survival outcome and is a viable alternative to other modalities of treatment.


Assuntos
Antineoplásicos Hormonais/uso terapêutico , Neoplasias da Mama/tratamento farmacológico , Carcinoma/tratamento farmacológico , Moduladores de Receptor Estrogênico/uso terapêutico , Estrogênios , Neoplasias Hormônio-Dependentes/tratamento farmacológico , Tamoxifeno/uso terapêutico , Adulto , Idoso , Idoso de 80 Anos ou mais , Antineoplásicos Hormonais/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias da Mama/mortalidade , Neoplasias da Mama/patologia , Neoplasias da Mama/terapia , Carcinoma/mortalidade , Carcinoma/patologia , Carcinoma/terapia , Terapia Combinada , Inglaterra/epidemiologia , Moduladores de Receptor Estrogênico/administração & dosagem , Feminino , Gosserrelina/administração & dosagem , Humanos , Pessoa de Meia-Idade , Neoplasias Hormônio-Dependentes/mortalidade , Ensaios Clínicos Controlados Aleatórios como Assunto/estatística & dados numéricos , Receptores de Estrogênio/análise , Estudos Retrospectivos , Taxa de Sobrevida , Tamoxifeno/administração & dosagem , Resultado do Tratamento
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA