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1.
BMC Cardiovasc Disord ; 24(1): 109, 2024 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-38355415

RESUMO

BACKGROUND: Early diagnosis of atrial fibrillation is important as it is crucial for improving patient outcomes. Fibroblast growth factor-2 (FGF2) may serve as a diagnostic biomarker for heart failure due to its ability to promote cardiac fibrosis and hypertrophy; however, the relationship between FGF2 concentration and heart failure is unclear. Therefore, this study aimed to explore whether FGF2 could aid in distinguishing patients with heart failure from healthy controls and those with dyspnea without heart failure. Additionally, to evaluate the possible correlation between serum FGF2 levels and its diagnostic parameters in patients with heart failure. METHODS: Plasma FGF2 concentration was measured in 114 patients with a complaint of dyspnea (enrolled in the study between January 2022 and August 2022). Based on heart failure diagnosis, the patients were assigned to three groups, as follows: heart failure (n = 80), non-heart-failure dyspnea (n = 34), and healthy controls (n = 36), following physical examination. Possible correlations between serum FGF2 levels and other prognostic parameters in patients with heart failure were analyzed. RESULTS: Serum FGF2 levels were higher in patients with heart failure (125.60 [88.95, 183.40] pg/mL) than in those with non-heart-failure dyspnea (65.30 [28.85, 78.95] pg/mL) and healthy controls (78.90 [60.80, 87.20] pg/mL) (p < 0.001). Receiver operating characteristic curve analysis identified FGF2 concentration as a significant predictor in heart failure diagnosis, with an area under the curve of 0.8693 (p < 0.0001). Importantly, in the heart failure group, serum FGF2 concentrations correlated with key prognostic parameters for heart failure, such as reduced left ventricular ejection fraction and elevated serum levels of N-terminal pro-B-type natriuretic peptide. CONCLUSIONS: Elevated serum FGF2 level is strongly associated with an increased risk of heart failure and could serve as a useful biomarker to complement vital diagnostic parameters for heart failure.


Assuntos
Fator 2 de Crescimento de Fibroblastos , Insuficiência Cardíaca , Humanos , Volume Sistólico , Função Ventricular Esquerda , Biomarcadores , Peptídeo Natriurético Encefálico , Fragmentos de Peptídeos , Dispneia/diagnóstico , Dispneia/etiologia
2.
Hong Kong Med J ; 30(3): 218-226, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38835098

RESUMO

INTRODUCTION: The level of amniotic fluid gamma-glutamyl transferase (AFGGT) may help identify biliary atresia (BA) in cases of non-visualisation of the fetal gallbladder (NVFGB). This study aimed to validate a serum/plasma matrix-based gamma-glutamyl transferase (GGT) assay for amniotic fluid (AF) samples, establish a local gestational age-specific AFGGT reference range, and evaluate the efficacy of AFGGT for predicting fetal BA in pregnancies with NVFGB using the constructed reference range. METHODS: The analytical performance of a serum/plasma matrix-based GGT assay on AF samples was evaluated using a Cobas c502 analyser. Amniotic fluid gamma-glutamyl transferase levels in confirmed euploid singleton pregnancies (16+0 to 22+6 weeks of gestation) were determined using the same analyser to establish a local gestational age-specific reference range (the 2.5th to 97.5th percentiles). This local reference range was used to determine the positive predictive value (PPV) and negative predictive value (NPV) of AFGGT level <2.5th percentile for identifying fetal BA in euploid pregnancies with NVFGB. RESULTS: The serum/plasma matrix-based GGT assay was able to reliably and accurately determine GGT levels in AF samples. Using the constructed local gestational age-specific AFGGT reference range, the NPV and PPV of AFGGT level <2.5th percentile for predicting fetal BA in pregnancies with NVFGB were 100% and 25% (95% confidence interval=0, 53), respectively. CONCLUSION: In pregnancies with NVFGB, AFGGT level ≥2.5th percentile likely excludes fetal BA. Although AFGGT level <2.5th percentile is not diagnostic of fetal BA, fetuses with AFGGT below this level should be referred for early postnatal investigation.


Assuntos
Líquido Amniótico , Atresia Biliar , Vesícula Biliar , Idade Gestacional , gama-Glutamiltransferase , Humanos , gama-Glutamiltransferase/sangue , Feminino , Gravidez , Estudos Retrospectivos , Valores de Referência , Líquido Amniótico/química , Atresia Biliar/diagnóstico , Atresia Biliar/sangue , Valor Preditivo dos Testes , Adulto , Diagnóstico Pré-Natal/métodos
3.
Ann Oncol ; 2023 Oct 21.
Artigo em Inglês | MEDLINE | ID: mdl-37871699

RESUMO

BACKGROUND: Oral SERDs are a novel drug class that have been developed to counteract resistance due to ESR1 mutations. Several SERDs have emerged from phase 2 and 3 trials, with the FDA limiting approval for Elacestrant to patients with ESR1mt tumours despite PFS benefit in the overall population. However, questions remain on whether patients with ESR1wt tumours stand to benefit from oral SERDs. PATIENTS AND METHODS: Manuscripts and conference presentations of Randomised Controlled Trials were extracted after a systematic search of Embase, PubMed and Cochrane from inception until January 21,2023. RCTs investigating the efficacy of oral SERDs versus endocrine therapy for ER positive, HER2 negative advanced breast cancer, and which reported the Kaplan Meier (KM) curves of PFS in the overall and ESR1 mutant (ESR1mt) population were selected. A graphical reconstructive algorithm was applied to estimate time-to-event outcomes from reported KM curves in all overall and ESR1mt cohorts. A bipartite matching algorithm, KMSubtraction, was used to derive survival data for unreported (ESR1wt) subgroups. An individual patient data (IPD) meta-analysis was then pursued, pooling data by ESR1 mutation status in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) and Cochrane Guidelines for IPD. RESULTS: The randomized clinical trials ACELERA, AMEERA-3, EMERALD and SERENA-2 were included, totalling 1290 patients. In the pooled analysis of the overall cohort, PFS benefit was observed with oral SERDs when compared with treatment of physicians choice (TPC) (HR 0.783, 95%CI 0.681-0.900, p<0.001). In the ESR1mt subgroup, oral SERDs demonstrated improved PFS (HR 0.557, 95%CI 0.440-0.705, p<0.001) compared to TPC. In the ESR1wt subgroup, oral SERDs demonstrated no significant PFS benefit (HR 0.944, 95%CI 0.783-1.138, p=0.543) when compared to TPC. CONCLUSIONS: The results of this IPD meta-analysis suggests that PFS benefit in the overall population is mainly driven by the ESR1mt subgroup.

4.
Osteoporos Int ; 33(3): 695-701, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-34625826

RESUMO

The rationale of this study was to examine the effectiveness of 6-month high-impact step aerobics (SA) or moderate-intensity resistance training exercise (RT) on bone mineral density (BMD) and bone bending strength in sedentary women. Results show that SA enhanced BMD in the heel, lower leg, and lumbar spine 2. INTRODUCTION: To determine the effectiveness of 6 months of high-impact step aerobics (SA) or moderate-intensity resistance training (RT) on areal bone mineral density (aBMD) and tibial bending strength in sedentary premenopausal women. METHODS: Sixty-nine women (20-35 years old) who were randomly assigned to RT (n = 22), SA (n = 26), or non-treatment control (CON, n = 21) groups completed the study. SA had a minimum of 50 high-impact landings each training session. RT had a periodized lower body resistance training program incorporating eight exercises (65-85% of 1 repetition maximum: 1-RM). Both RT and SA met 3 times weekly. aBMD was assessed using dual X-ray absorptiometry (DXA). Tibial bending strength was assessed using mechanical response tissue analysis (MRTA). Measurements at 6 months were compared to baseline using ANCOVA, adjusted for baseline measures and covariates with α = 0.05. RESULTS: Calcaneus aBMD (0.0176 vs -0.0019 or -0.0009 g/cm2 relative to RT, p < 0.004, and CON, p < 0.006, respectively), lower leg aBMD (0.0105 vs -0.0036 g/cm2, relative to RT, p = 0.02), and lumbar spine 2 (L2) aBMD (0.0082 vs -0.0157 g/cm2 relative to CON, p < 0.02) were significantly greater in the SA group after 6 months. Tibial bending strength and bone resorption biomarkers were unchanged in all three groups after 6 months. CONCLUSION: Sedentary premenopausal women engaging in 6 months of high-impact aerobic exercise improved aBMD in the calcaneus, lower leg, and L2.


Assuntos
Densidade Óssea , Treinamento Resistido , Absorciometria de Fóton , Adulto , Exercício Físico , Feminino , Humanos , Pré-Menopausa , Adulto Jovem
5.
Hong Kong Med J ; 28(3): 223-229, 2022 06.
Artigo em Inglês | MEDLINE | ID: mdl-35765732

RESUMO

INTRODUCTION: With widespread adoption of antiretroviral therapy, human immunodeficiency virus (HIV) epidemiology has changed since the late 2000s. Accordingly, attitudes towards the disease may also have changed. Because medical students are future physicians, their attitudes have important implications in access to care among patients with HIV/acquired immunodeficiency syndrome (AIDS). Here, we performed a survey to compare medical students' attitudes towards HIV/AIDS between the late 2000s (2007-2010) and middle 2010s (2014- 2017). METHODS: From 2007 to 2010, we surveyed three cohorts of medical students at the end of clinical training to assess their attitudes towards HIV/AIDS. From 2014 to 2017, we surveyed three additional cohorts of medical students at the end of clinical training to compare changes in attitudes towards HIV/AIDS between the late 2000s and middle 2010s. Each set of three cohorts was grouped together to maximise sample size; comparisons were performed between the 2007-2010 and 2014-2017 cohorts. RESULTS: From 2007 to 2010, 546 medical students were surveyed; from 2014 to 2017, 504 students were surveyed. Compared with students in the late 2000s, significantly fewer students in the mid-2010s initially encountered patients with HIV during attachment to an HIV clinic or preferred to avoid work in a field involving HIV/AIDS; significantly more students planned to specialise in HIV medicine. Student willingness to provide HIV care remained similar over time: approximately 78% of students were willing to provide care in each grouped cohort. CONCLUSION: Although medical students had more positive attitudes towards HIV/AIDS, their willingness to provide HIV care did not change between the late 2000s and middle 2010s.


Assuntos
Síndrome da Imunodeficiência Adquirida , Infecções por HIV , Estudantes de Medicina , Síndrome da Imunodeficiência Adquirida/tratamento farmacológico , Infecções por HIV/tratamento farmacológico , Infecções por HIV/epidemiologia , Hong Kong , Humanos , Inquéritos e Questionários
6.
Ultrasound Obstet Gynecol ; 57(4): 631-638, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-32898286

RESUMO

OBJECTIVES: Mesh repair surgery for pelvic organ prolapse (POP) has been suspended in some countries owing to concerns about its associated complications. However, mesh repair has been shown to reduce the risk of prolapse recurrence after surgery. In view of this controversy, our aim was to assess the incidence of subjective and objective recurrence of POP following mesh repair surgery vs native-tissue repair in women with Stage-III or Stage-IV POP. METHODS: This was a prospective observational study of women who presented with Stage-III or Stage-IV POP and received primary prolapse surgery between 2013 and 2018. Transperineal ultrasound was performed before the operation and volumes were analyzed offline to assess the presence of levator ani muscle (LAM) avulsion. All women were counseled on either mesh repair or native-tissue reconstruction. The mesh-repair group was followed up for up to 5 years and the native-tissue-repair group for up to 2 years after the operation. Prolapse symptoms and POP quantification (POP-Q) staging were assessed at follow-up. Subjective recurrence of POP was defined as symptoms of prolapse (vaginal bulge sensation or dragging sensation) reported by the patient. Objective recurrence was defined as POP-Q ≥ Stage II. The subjective and objective recurrences of prolapse were compared between women with and those without mesh use. Multivariate regression analysis was used to identify risk factors for the recurrence of POP. RESULTS: A total of 154 Chinese women with Stage-III or Stage-IV prolapse were recruited. Of these, 104 (67.5%) underwent mesh repair (transabdominal in 57 women and transvaginal in 47 women) and 50 (32.5%) had native-tissue repair surgery. Ninety-five (61.7%) women had LAM avulsion. Both the subjective POP recurrence rate (4.8% vs 20.0%; P = 0.003) and the objective recurrence rate (20.2% vs 46.0%; P = 0.001) were significantly lower in the mesh-repair group than in the native-tissue-repair group. On multivariate logistic regression analysis, mesh repair was associated significantly with a reduced risk of subjective recurrence (odds ratio (OR), 0.20 (95% CI, 0.07-0.63)) and of objective recurrence (OR, 0.16 (95% CI, 0.07-0.55)) of prolapse. On subgroup analysis of women with LAM avulsion, mesh repair significantly reduced the risk of subjective recurrence (OR, 0.24 (95% CI, 0.07-0.87)) and objective recurrence (OR, 0.23 (95% CI, 0.09-0.57)) of POP. The incidence of mesh-related complications was low, and mesh exposure could be treated conservatively or by minor surgery. CONCLUSIONS: Mesh repair surgery, compared with native-tissue repair, was associated with a 5-fold reduction in the risk of subjective recurrence and a 6-fold reduction in the risk of objective recurrence of prolapse in women with Stage-III or Stage-IV POP. In women with concomitant LAM avulsion, mesh repair surgery was associated with a 4-fold reduction in both objective and subjective recurrence of POP. The rate of mesh-related complications was low, and mesh exposure could be treated conservatively or by minor surgery. The benefit of mesh surgery for these high-risk women appears to outweigh the risks of mesh complications, and it could be a treatment option for this group of women. © 2020 International Society of Ultrasound in Obstetrics and Gynecology.


Assuntos
Diafragma da Pelve/cirurgia , Prolapso de Órgão Pélvico/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Complicações Pós-Operatórias/epidemiologia , Telas Cirúrgicas , Idoso , Feminino , Humanos , Pessoa de Meia-Idade , Diafragma da Pelve/fisiopatologia , Prolapso de Órgão Pélvico/patologia , Complicações Pós-Operatórias/etiologia , Período Pós-Operatório , Estudos Prospectivos , Recidiva , Resultado do Tratamento
7.
Tech Coloproctol ; 24(11): 1121-1136, 2020 11.
Artigo em Inglês | MEDLINE | ID: mdl-32681344

RESUMO

BACKGROUND: Emergency surgery (ES) is the standard-of-care for left-sided obstructing colon cancer, with self-expanding metallic stents (SEMSs) and diverting colostomies (DCs) being alternative approaches. The aim of this study was to review the short- and long-term outcomes of SEMS versus ES or DC. METHODS: Embase and Medline were searched for articles comparing SEMS versus ES or DC. Primary outcomes were survival and recurrence rates. Secondary outcomes were peri- and postoperative outcomes. SEMS-specific outcomes include success and complication rates. Pooled odds ratio and 95% confidence interval were estimated with DerSimonian and Laird random effects used to account for heterogeneity. RESULTS: Thirty-three studies were included, involving 15,224 patients in 8 randomized controlled trials and 25 observational studies. There were high technical and clinical success rates for SEMS, with low rates of complications. Our meta-analysis revealed increased odds of laparoscopic surgery and anastomosis, and decreased stoma creation with SEMS compared to ES. SEMS led to fewer complications, including anastomotic leak, wound infection, ileus, myocardial infarction, and improved 90-day in-hospital mortality. There were no significant differences in 3- and 5-year overall, cancer-specific and disease-free survival. SEMS, compared to DC, led to decreased rates of stoma creation, higher rates of ileus and reoperation, and led to longer hospital stay. CONCLUSIONS: SEMS leads to better short-term outcomes but confers no survival advantage over ES. It is unclear whether SEMS has better short-term outcomes compared to DC. There is a lack of randomized trials with long-term outcomes for SEMS versus DC, hence results should be interpreted with caution.


Assuntos
Neoplasias do Colo , Neoplasias Colorretais , Obstrução Intestinal , Estomas Cirúrgicos , Neoplasias do Colo/complicações , Neoplasias do Colo/cirurgia , Humanos , Obstrução Intestinal/etiologia , Obstrução Intestinal/cirurgia , Recidiva Local de Neoplasia , Estudos Retrospectivos , Stents , Resultado do Tratamento
8.
BMC Infect Dis ; 19(1): 352, 2019 Apr 27.
Artigo em Inglês | MEDLINE | ID: mdl-31029097

RESUMO

BACKGROUND: Cervical cancer is caused by oncogenic human papillomaviruses (HPV) and is one of the most common malignancies in women living in sub-Saharan Africa. Women infected with the human immunodeficiency virus (HIV) have a higher incidence of cervical cancer, but the full impact on HPV detection is not well understood, and associations of biological and behavioral factors with oncogenic HPV detection have not been fully examined. Therefore, a study was initiated to investigate factors that are associated with oncogenic HPV detection in Kenyan women. METHODS: Women without cervical dysplasia were enrolled in a longitudinal study. Data from enrollment are presented as a cross-sectional analysis. Demographic and behavioral data was collected, and HPV typing was performed on cervical swabs. HIV-uninfected women (n = 105) and HIV-infected women (n = 115) were compared for demographic and behavioral characteristics using t-tests, Chi-square tests, Wilcoxon sum rank tests or Fisher's exact tests, and for HPV detection using logistic regression or negative binomial models adjusted for demographic and behavioral characteristics using SAS 9.4 software. RESULTS: Compared to HIV-uninfected women, HIV-infected women were older, had more lifetime sexual partners, were less likely to be married, were more likely to regularly use condoms, and were more likely to have detection of HPV 16, other oncogenic HPV types, and multiple oncogenic types. In addition to HIV, more lifetime sexual partners was associated with a higher number of oncogenic HPV types (aIRR 1.007, 95% CI 1.007-1.012). Greater travel distance to the clinic was associated with increased HPV detection (aOR for detection of ≥ 2 HPV types: 3.212, 95% CI 1.206-8.552). Older age (aOR for HPV 16 detection: 0.871, 95% CI 0.764-0.993) and more lifetime pregnancies (aOR for detection of oncogenic HPV types: 0.706, 95% CI, 0.565-0.883) were associated with reduced detection. CONCLUSION: HIV infection, more lifetime sexual partners, and greater distance to health-care were associated with a higher risk of oncogenic HPV detection, in spite of ART use in those who were HIV-infected. Counseling of women about sexual practices, improved access to health-care facilities, and vaccination against HPV are all potentially important in reducing oncogenic HPV infections.


Assuntos
Infecções por HIV/patologia , Infecções por Papillomavirus/diagnóstico , Adulto , Fatores Etários , Estudos Transversais , Feminino , Genótipo , Infecções por HIV/epidemiologia , Papillomavirus Humano 16/isolamento & purificação , Humanos , Quênia/epidemiologia , Modelos Logísticos , Estudos Longitudinais , Pessoa de Meia-Idade , Razão de Chances , Infecções por Papillomavirus/epidemiologia , Infecções por Papillomavirus/virologia , Fatores de Risco , Parceiros Sexuais , Vagina/virologia , Adulto Jovem
10.
Hong Kong Med J ; 25(5): 382-391, 2019 10.
Artigo em Inglês | MEDLINE | ID: mdl-31619578

RESUMO

INTRODUCTION: Pre-exposure prophylaxis (PrEP) with tenofovir disoproxil fumarate (TDF) 300 mg/emtricitabine (FTC) 200 mg is a proven strategy for preventing human immunodeficiency virus (HIV) transmission in men who have sex with men (MSM). This study aimed to test the feasibility and acceptability of PrEP delivered at a pilot clinic for MSM in Hong Kong, where PrEP service is currently unavailable. METHODS: Partially self-financed PrEP was provided to HIV-negative adult MSM with high behavioural risk of HIV transmission after excluding hepatitis B infection and renal insufficiency. Participants received daily TDF/FTC for 30 weeks at 13.3% of the drug cost. Adherence and behaviours were monitored through questionnaires while creatinine and HIV/STI (sexually transmitted infection) incidence were monitored with point-of-care and laboratory tests. Preference for continuing with PrEP was evaluated at the end of the prescription period. RESULTS: Seventy-one PrEP-naïve MSM were included in the study, of whom 57 (80%) were retained at the end of 28 weeks. Satisfactory adherence and self-limiting adverse events were reported, while none of the participants contracted HIV. Risk compensation was observed, with an STI incidence of 3.17 per 100 person-years. At the end of the prescription period, a majority (89%) indicated interest in continuing with PrEP. Preference for PrEP was associated with age ≥28 years and peer influence (P=0.04), while stigma was a concern. Price was a deterrent to self-financed PrEP, and only half (51%) considered a monthly cost of ≤HK$500 (US$1=HK$7.8) as reasonable. CONCLUSIONS: A partially self-financed mode of PrEP delivery is feasible with good retention in MSM in Hong Kong.


Assuntos
Fármacos Anti-HIV/uso terapêutico , Combinação Emtricitabina e Fumarato de Tenofovir Desoproxila/uso terapêutico , Infecções por HIV/prevenção & controle , Profilaxia Pré-Exposição/economia , Adulto , Economia Médica , Infecções por HIV/economia , Infecções por HIV/epidemiologia , Homossexualidade Masculina , Hong Kong/epidemiologia , Humanos , Incidência , Masculino , Adesão à Medicação/estatística & dados numéricos , Projetos Piloto , Inquéritos e Questionários
11.
J Viral Hepat ; 25(2): 161-170, 2018 02.
Artigo em Inglês | MEDLINE | ID: mdl-29032634

RESUMO

While hepatitis C virus (HCV) infection is long known to be associated with parenteral exposure, the specific route of transmission is not identified in a proportion of infected patients. Taking blood donors as the surrogate of healthy adults in the community in Hong Kong, we identified 91 HCV-infected donors (≤0.02% positive rate) in 2014-2016, of whom 46 were recruited in a mixed-method study to examine their transmission routes. A majority (75%) of the recruited donors were HCV RNA positive, with the predominant subtypes being 1b and 6a. From the results of the structured self-administered questionnaire and in-depth interviews, only 14 (30%) recruited donors could be traced to past history of contaminated blood transfusion (n = 9) or injection drug use (n = 5). Case-control analyses with 3 different control groups were performed to examine factors associated with HCV infection in multivariable analyses. High-risk sexual behaviour, body piercing, intramuscular injection and vaccine inoculation abroad, having lived abroad for >3 months were significantly associated with HCV in donors with otherwise nonidentifiable source of infection. While the specific route of transmission cannot be established for each person, associations with multiple parenteral exposures outside Hong Kong were observed. The World Health Organization has advocated for the global elimination of HCV by 2030. With a high proportion of HCV-infected persons who are unaware of their infections, HCV elimination could be hard to achieve.


Assuntos
Doadores de Sangue , Hepatite C/epidemiologia , Hepatite C/transmissão , Adulto , Idoso , Transfusão de Sangue , Estudos de Casos e Controles , Feminino , Genótipo , Voluntários Saudáveis/estatística & dados numéricos , Hepacivirus/genética , Hepacivirus/isolamento & purificação , Anticorpos Anti-Hepatite C/sangue , Hong Kong/epidemiologia , Humanos , Masculino , Pessoa de Meia-Idade , Prevalência , RNA Viral/sangue , Fatores de Risco , Comportamento Sexual , Abuso de Substâncias por Via Intravenosa , Reação Transfusional
13.
Pharmacogenomics J ; 17(4): 337-343, 2017 07.
Artigo em Inglês | MEDLINE | ID: mdl-26975227

RESUMO

This study investigated the impact of ABCB5, ABCC5 and RLIP76 polymorphisms on doxorubicin pharmacokinetics in Asian breast cancer patients (N=62). Direct sequencing was performed to screen for previously identified ABCC5 polymorphisms as well as polymorphisms in the exons and exon-intron boundaries of ABCB5 and RLIP76 genes. Genotype-phenotype correlations were analyzed using Mann-Whitney U-test. The homozygous variant allele at the ABCC5 g.+7161G>A (rs1533682) locus was significantly associated with higher doxorubicin clearance (g.+7161AA vs g.+7161GG, CL/BSA (Lh-1m-2): 30.34 (25.41-33.60) vs 22.46 (15.04-49.4), P=0.04). Homozygosity for the reference allele at the ABCC5 g.-1679T>A locus was associated with significantly higher doxorubicinol exposure (g.-1679TT vs g.-1679TA, AUC0-∞/dose/BSA (hm-5): 15.48 (6.18-67.17) vs 8.88 (3.68-21.71), P=0.0001). No significant influence of the three newly identified ABCB5 polymorphisms (c.2T>C, c.343A>G and c.1573G>A) on doxorubicin pharmacokinetics was observed. No polymorphisms were identified in the RLIP76 gene. These findings suggest that ABCC5 polymorphisms may explain partially the interpatient variability in doxorubicin disposition.


Assuntos
Membro 1 da Subfamília B de Cassetes de Ligação de ATP/genética , Transportadores de Cassetes de Ligação de ATP/genética , Povo Asiático/genética , Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/genética , Doxorrubicina/farmacocinética , Proteínas Ativadoras de GTPase/genética , Proteínas Associadas à Resistência a Múltiplos Medicamentos/genética , Subfamília B de Transportador de Cassetes de Ligação de ATP , Adulto , Idoso , Alelos , Antibióticos Antineoplásicos/farmacocinética , Antibióticos Antineoplásicos/uso terapêutico , Doxorrubicina/uso terapêutico , Éxons/genética , Feminino , Frequência do Gene/genética , Estudos de Associação Genética , Genótipo , Haplótipos/genética , Humanos , Pessoa de Meia-Idade , Farmacogenética/métodos , Polimorfismo Genético/genética
15.
Curr Oncol ; 24(6): 352-359, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-29270046

RESUMO

BACKGROUND: In families with a proven BRCA1/2 mutation, women not carrying the familial mutation should follow the cancer screening recommendations applying to women in the general population. In the present study, we evaluated the cancer screening practices of unaffected noncarriers from families with a proven BRCA mutation, and we assessed the role of family history in their screening practices. METHODS: Self-report data were provided retrospectively by 220 unaffected female noncarriers for periods of up to 10 years (mean: 4.3 years) since disclosure of their BRCA1/2 genetic test result. A ratio for the annual frequency of breast and ovarian cancer screening exams (mammography, breast ultrasonography, breast magnetic resonance imaging, transvaginal or pelvic ultrasound, cancer antigen 125 testing) was calculated as number of screening exams divided by the number of years in the individual observation period. RESULTS: The annual average for mammography exams was 0.15, 0.4, 0.56, and 0.71 in women 30-39, 40-49, 50-59, and 60-69 years of age respectively. The uptake of other breast and ovarian cancer screening exams was very low. Mammography and breast ultrasonography and magnetic resonance imaging were generally more frequent among participants with at least 1 first-degree relative affected by breast cancer. CONCLUSIONS: In most noncarriers, screening practices are consistent with the guidelines concerning women in the general population. When noncarriers adopt screening behaviours that are different from those that would be expected for average-risk women, those behaviours are influenced by their familial cancer history. IMPACT: Decision tools might help female noncarriers to be involved in their follow-up in accordance with their genetic status and their family history, while taking into account the benefits and disadvantages of cancer screening.

17.
Psychol Med ; 46(12): 2485-99, 2016 09.
Artigo em Inglês | MEDLINE | ID: mdl-27328861

RESUMO

BACKGROUND: Late-life depression (LLD) in the elderly was reported to present with emotion dysregulation accompanied by high perceived loneliness. Previous research has suggested that LLD is a disorder of connectivity and is associated with aberrant network properties. On the other hand, perceived loneliness is found to adversely affect the brain, but little is known about its neurobiological basis in LLD. The current study investigated the relationships between the structural connectivity, functional connectivity during affective processing, and perceived loneliness in LLD. METHOD: The current study included 54 participants aged >60 years of whom 31 were diagnosed with LLD. Diffusion tensor imaging (DTI) data and task-based functional magnetic resonance imaging (fMRI) data of an affective processing task were collected. Network-based statistics and graph theory techniques were applied, and the participants' perceived loneliness and depression level were measured. The affective processing task included viewing affective stimuli. RESULTS: Structurally, a loneliness-related sub-network was identified across all subjects. Functionally, perceived loneliness was related to connectivity differently in LLD than that in controls when they were processing negative stimuli, with aberrant networking in subcortical area. CONCLUSIONS: Perceived loneliness was identified to have a unique role in relation to the negative affective processing in LLD at the functional brain connectional and network levels. The findings increas our understanding of LLD and provide initial evidence of the neurobiological mechanisms of loneliness in LLD. Loneliness might be a potential intervention target in depressive patients.


Assuntos
Envelhecimento , Conectoma/métodos , Transtorno Depressivo Maior/fisiopatologia , Solidão , Rede Nervosa/fisiopatologia , Idoso , Transtorno Depressivo Maior/diagnóstico por imagem , Imagem de Tensor de Difusão , Feminino , Humanos , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Rede Nervosa/diagnóstico por imagem
18.
Diabet Med ; 33(7): 912-9, 2016 07.
Artigo em Inglês | MEDLINE | ID: mdl-26341116

RESUMO

AIMS: The metabolic syndrome (MetS) is a clustering of low levels of HDL cholesterol, hyperglycaemia, high waist circumference, hypertension and elevated triglycerides, and is associated with cardiovascular disease. Calcified atherosclerotic plaque in the thoracic aorta (TAC), measured by non-contrast cardiac computed tomography (CT) scans, is a marker for atherosclerosis and relates to mortality. We sought to evaluate the independent association of MetS and TAC on cardiac CT scans. METHODS: We examined the relation of the MetS, and each of its components, to the prevalence of TAC, measured from 2000 to 2002 in 6778 white, Chinese, African-American and Hispanic participants in the Multi-Ethnic Study of Atherosclerosis (MESA). RESULTS: Adjusting for age, gender, race, smoking, LDL cholesterol and lipid-lowering medications, relative risks and 95% confidence intervals (CI) for a TAC score > 0 were: 1.19 (95% CI 1.11 to 1.28) for participants with MetS, 1.34 (95% CI 1.21 to 1.49) for those with diabetes and MetS, and 1.33 (95% CI 1.11, 1.58) for those with diabetes and no MetS compared with participants who were free of the MetS and diabetes. Associations were found for most of the components of the MetS with TAC. CONCLUSIONS: We conclude that in adults without known heart disease, the MetS, most of its components and diabetes are associated with a higher prevalence of calcified atherosclerotic plaque in the thoracic arteries in a multi-ethnic population of men and women.


Assuntos
Doenças da Aorta/epidemiologia , Diabetes Mellitus/epidemiologia , Síndrome Metabólica/epidemiologia , Calcificação Vascular/epidemiologia , Negro ou Afro-Americano , Idoso , Idoso de 80 Anos ou mais , Aorta Torácica/diagnóstico por imagem , Doenças da Aorta/diagnóstico por imagem , Asiático , Doenças Cardiovasculares/epidemiologia , China , HDL-Colesterol/sangue , Dislipidemias/sangue , Dislipidemias/epidemiologia , Feminino , Hispânico ou Latino , Humanos , Hiperglicemia/epidemiologia , Hipertensão/epidemiologia , Hipertrigliceridemia/sangue , Hipertrigliceridemia/epidemiologia , Masculino , Pessoa de Meia-Idade , Tomografia Computadorizada por Raios X , Calcificação Vascular/diagnóstico por imagem , Circunferência da Cintura , População Branca
19.
Support Care Cancer ; 24(1): 401-408, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26093975

RESUMO

PURPOSE: Psychological responses to cancer are widely believed to affect survival. We investigated associations between hope, optimism, anxiety, depression, health utility and survival in patients starting first-line chemotherapy for metastatic colorectal cancer. METHODS: Four hundred twenty-nine subjects with metastatic colorectal cancer in a randomised controlled trial of chemotherapy completed baseline questionnaires assessing the following: hopefulness, optimism, anxiety and depression and health utility. Hazard ratios (HRs) and P values were calculated with Cox models for overall survival (OS) and progression-free survival (PFS) in univariable and multivariable analyses. RESULTS: Median follow-up was 31 months. Univariable analyses showed that OS was associated negatively with depression (HR 2.04, P < 0.001) and positively with health utility (HR 0.56, P < 0.001) and hopefulness (HR 0.75, P = 0.013). In multivariable analysis, OS was also associated negatively with depression (HR 1.72, P < 0.001) and positively with health utility (HR 0.73, P = 0.014), but not with optimism, anxiety or hopefulness. PFS was not associated with hope, optimism, anxiety or depression in any analyses. CONCLUSIONS: Depression and health utility, but not optimism, hope or anxiety, were associated with survival after controlling for known prognostic factors in patients with advanced colorectal cancer. Further research is required to understand the nature of the relationship between depression and survival. If a causal mechanism is identified, this may lead to interventional possibilities.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Neoplasias Colorretais/tratamento farmacológico , Esperança , Otimismo , Idoso , Transtornos de Ansiedade/etiologia , Neoplasias Colorretais/psicologia , Transtorno Depressivo/etiologia , Intervalo Livre de Doença , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Metástase Neoplásica , Modelos de Riscos Proporcionais , Inquéritos e Questionários
20.
Curr Oncol ; 23(6): e615-e625, 2016 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-28050152

RESUMO

In recent years, risk stratification has sparked interest as an innovative approach to disease screening and prevention. The approach effectively personalizes individual risk, opening the way to screening and prevention interventions that are adapted to subpopulations. The international perspective project, which is developing risk stratification for breast cancer, aims to support the integration of its screening approach into clinical practice through comprehensive tool-building. Policies and guidelines for risk stratification-unlike those for population screening programs, which are currently well regulated-are still under development. Indeed, the development of guidelines for risk stratification reflects the translational aspects of perspective. Here, we describe the risk stratification process that was devised in the context of perspective, and we then explain the consensus-based method used to develop recommendations for breast cancer screening and prevention in a risk-stratification approach. Lastly, we discuss how the recommendations might affect current screening policies.

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