06 May 2014 In Cancer

 

 

 

BACKGROUND: Barrett's esophagus (BE) is a precursor lesion of esophageal adenocarcinoma. Besides gastroesophageal reflux, possible risk factors for BE include overweight, cigarette smoking, and alcohol consumption. Our objective was to study these associations using prospective data.

METHODS: The prospective Netherlands Cohort Study, initiated in 1986, consists of 120,852 men and women, aged 55-69 years at baseline. At baseline, all subjects completed a questionnaire on dietary habits and lifestyle. After 16.3 years of follow-up, 370 BE cases with specialized intestinal metaplasia and 3866 subcohort members were available for case-cohort analysis. Cox proportional hazards models were used to calculate incidence rate ratios (RR) and 95% confidence intervals (CI).

RESULTS: Body mass index at baseline was associated with risk of BE in women [multivariable adjusted RR per 1 kg/m2, 1.07 (1.03-1.11)] but not in men [RR per 1 kg/m2, 0.99 (0.93-1.05)]. The association in women was not specifically due to abdominal overweight. Former cigarette smokers were at increased risk of BE (RR=1.33, 95% CI 1.00-1.77), but current smokers were not. Smoking duration showed a positive association with BE risk (p trend=0.03). For alcohol consumption, the RR per 10 grams ethanol/day was 0.95 (0.87-1.03).

CONCLUSIONS: Increased body mass index was a risk factor for BE in women, but not in men. Several aspects of cigarette smoking were positively associated with BE risk. Alcohol consumption was not associated with an increased risk of BE.Impact: Future research should focus on risk factors for development as well as for progression of BE to esophageal adenocarcinoma.

 

 

 

06 May 2014 In Cancer

 

 

 

PURPOSE: Given the high cost and side effects of radioprotective agents such as amifostine, attention has been focused on potentially equally effective but less expensive and toxic natural substances. We evaluated the potential radioprotective effects of wine in preventing skin toxicity in patients with breast cancer.

METHODS AND MATERIALS: Before treatment, the medical history and habits of patients were assessed and the information recorded in their clinical folders. Patients were divided into three groups based on the dose/fractionation scheme used: control group, 60.4 Gy (standard technique); Modulated Accelerated Radiotherapy in Adjuvant treatment of breast cancer (MARA)-1 protocol group, 44 Gy (concomitant boost to tumoral bed); and MARA-2 protocol group, 60 Gy (concomitant boost to tumoral bed). The impact of the following variables on acute skin toxicity was evaluated by chart review: radiotherapy protocol, planning target volume (PTV), comorbidity (e.g., hypertension and diabetes), hemoglobin level before therapy, adjuvant hormone therapy, adjuvant chemotherapy, cigarette smoking, and drinking habits.

RESULTS: The study population consisted of 348 patients. More severe skin toxicity was significantly associated with the radiotherapy protocol (p < 0.001) and median PTV (p = 0.005). In addition, the incidence of acute toxicity of Grade 2 or greater was higher in patients without alcohol intake (38.4% vs. 22.3%, p = 0.021). The daily amount of alcohol intake also influenced the incidence of skin toxicity, with an incidence of 38.4% in patients with no wine intake, 31.8% in patients drinking half a glass per day, 13.6% in patients drinking one glass per day, and 35.0% in patients drinking two glasses per day. Multivariate analysis showed that wine intake, PTV, and radiotherapy protocol were all significantly correlated with acute toxicity.

CONCLUSIONS: Our results indicate that wine may have a radioprotective effect; however, prospective studies are needed to confirm this beneficial effect of wine and its components.

 

 

 

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