Investigation of micronucleus frequencies in lymphocytes of inhabitants environmentally exposed to chrysotile asbestos

Exposure to asbestos minerals has been associated with a wide variety of adverse health effects including lung cancer, pleural mesothelioma, and cancer of other organs. Many of the regions of Turkey have asbestos deposits. People in Do?anl? village – one of these regions – have been environmentally exposed to chrysotile asbestos since they were born. In this study the effects of asbestos on micronucleus (MN) frequencies of inhabitants exposed to chrysotile asbestos have been examined. Thirty subjects who had been environmentally exposed to chrysotile asbestos and living in Do?anl? village, and 25 controls were studied to assess the MN frequency. The control group was selected from healthy individuals with no exposure to asbestos and living in similar geographic conditions to Do?anl? village. Peripheral blood samples were collected from each subject and cultured for MN assay. Cytochalasin-B was added to lymphocyte cultures for evaluation of MN in binucleated (BN) cells. The differences between those exposed to chrysotile asbestos and controls were not statistically significant in terms of BN cells with MN (p > 0.05). There was not a significant relationship between MN frequencies and age, sex, smoking, both in chrysotile asbestos-exposed subjects and in controls (p > 0.05). Although the detection of calcified pleural plaques found in the inhabitants has indicated environmental exposure to chrysotile asbestos, our results show that chrysotile asbestos was not an inducer of MN in subjects exposed to chrysotile asbestos.     

Intravenous Propafenone for Conversion of Atrial Fibrillation or Flutter to Sinus Rhythm: A Randomized, Placebo-controlled, Crossover Study

BACKGROUND: Propafenone has been claimed to be effective in converting atrial fibrillation and flutter to sinus rhythm; however, controlled clinical trials have reported variable results, and data about the safety of propafenone in the setting of heart failure are lacking. The aim of the present study was to evaluate the efficacy and safety of intravenous propafenone in converting atrial fibrillation and flutter to sinus rhythm. METHODS: Sixty patients with acute (<72 h) or chronic atrial fibrillation or flutter were included in a randomized, placebo-controlled, conditional cross-over study. Twenty eight patients, of whom 12 were in New York Heart Association class III and IV, had heart failure. Patients received intravenous propafenone (2 mg/kg in 10 minutes) and placebo subsequently at 1 hour intervals if sinus rhythm was not achieved. The patients' rhythms were continuously monitored for 1 hour and a 12-lead electrocardiogram, a 1-minute continuous rhythm strip and vital signs were recorded at baseline and at 15, 30, 45, and 60 minutes after the administration of each drug. RESULTS: Twenty of teh 59 patients (34%) treated with propafenone converted to sinus rhythm, while only 4 of the 50 patients (8%) treated with placebo converted (P <.001). Propafenone was more effective in patients with acute (<72 h) atrial fibrillation (64.5%). The conversion rate with propafenone was not significantly different from placebo in patients with atrial flutter and chronic atrial fibrillation (>72 h). Propafenone significantly decreased (P <.005 vs placebo) mean ventricular rate in nonresponders with a baseline heart rate of more than 100 beats/min. No clinically significant adverse effect occurred. CONCLUSIONS: We conclude that intravenous propafenone treatment is effective for converting acute atrial fibrillation; however, it seems unlikely to be beneficial in atrial flutter and chronic atrial fibrillation. Propafenone decreases ventricular rate in nonresponders, and a single dose of propafenone is relatively safe even in moderate-to-severe heart failure.     

Serum Pentraxin-3 Level in Patients Who Underwent Coronary Angiography and Relationship with Coronary Atherosclerosis

Objectives

To evaluate the role of pentraxin-3 (PTX-3) in determining the presence and severity of coronary atherosclerosis in patients with coronary artery disease (CAD).

Subjects and Methods

Ninety-five patients (77 males and 18 females) who underwent elective coronary angiography were enrolled in this study. Patients with heart failure, renal failure, diabetes and thyroid disease were excluded. The study population was divided into 3 groups: individuals with normal coronary arteries, patients with critical CAD (n = 35) and patients with noncritical CAD (n = 36). The association of PTX-3 levels with the presence and severity of CAD and the number of involved vessels were analyzed.

Results

The mean age was 53.40 ± 10.25 years. The PTX-3 levels were significantly higher in patients with CAD than without CAD (146.48 ± 48.52 vs. 109.83 ± 49.06 pg/ml, p < 0.001). A statistically significant difference was found among the 3 groups regarding the severity of CAD (165.66 ± 49.10, 127.83 ± 40.51 and 109.83 ± 49.06 pg/ml, p < 0.001, respectively). The serum PTX-3 levels in normal arteries were 110.4 ± 48.11 pg/ml, in single-vessel disease 132.35 ± 32.96 pg/ml, in 2-vessel disease 142.57 ± 55.88 pg/ml, in 3-vessel disease 156.07 ± 50.53 pg/ml, and in 3-vessel disease 160.50 ± 30.41 pg/ml. After adjusting for baseline confounders, older age (OR = 1.107, 95% CI = 1.027-1.193, p = 0.008) and higher PTX-3 levels (OR = 1.017, 95% CI = 1.003-1.032, p = 0.021) were detected as significant predictors for the presence of CAD.

Conclusions

Higher PTX-3 levels were associated with the presence of CAD and its increased severity in clinically stable patients. Higher PTX-3 levels may be regarded as a novel diagnostic predictor and may offer therapeutic options in the clinic.Key Words: Coronary angiography, Coronary artery disease, Pentraxin-3     

Examining prevalence of urinary incontinence and risk factors in women in third postpartum month

Are pregnancy and birth‐related parameters important risk factors in the development of urinary incontinence (UI)? The aim of this study is to examine the prevalence of UI and associated risk factors in Turkish women in the third postpartum month. Incontinence after childbirth is a common problem. A cross‐sectional study that included 370 women in third postpartum month in Çanakkale is presented in this paper. Wagner's quality of life scale questionnaire exploring the risk factors for UI was used as the principle data collection tool. All women gave consent prior to inclusion in the study. Chi‐square, t test, Mann‐Whitney U test and Binary logistic regression were used for comparison. The prevalence of self‐reported postpartum UI was 35.9%. In this study; age, educational level, parity, number of normal birth, nocturia and constipation were determined to be the associated risk factors for postpartum UI in univariate analysis. When examining these risk factors by using logistic regression, it was found that the number of birth being 2 increased UI 2.7 times (P = 0.002, 95% CI:1.434‐5.324), the number of birth being 3 or more increased UI 20.3 times (P = 0.001, 95% CI:7.130‐58.332) and nocturia being 3 times and more increased UI 2.6 times (P = 0.041, 95% CI:1.042‐6.790). Pregnancy and birth‐related parameters are important risk factors in development of UI. It would be useful to increase the awareness in women in pregnancy and the postpartum period, by providing health training and consultancy services about UI protection and the reduction of risk factors.     

Role of Capsaicin-Sensitive Nerves in Gastric and Hepatic Injury Induced by Cold-Restraint Stress

The role of capsaicin-sensitive afferent fibers on cold-restraint stress-induced gastric and hepatic injury was examined at the macroscopic and ultrastructural levels. Wistar albino rats were treated with capsaicin either locally (intragastric, perivagal, and periceliac) or systemically (neonatal, intraperitoneal). Perineural and neonatal treatment with capsaicin was used to denervate afferent fibers, while intragastric capsaicin treatment would have activated mucosal afferent fibers just before the stress exposure. Capsaicin decreased significantly the formation of macroscopic gastric lesions caused by stress in all treatment groups. At the electron microscopic level, however, denervation of vagal afferent fibers with capsaicin was most effective in prevention of cellular injury in gastric mucosa. In the liver, systemic denervation of afferent fibers completely inhibited stress-induced cellular damage, while denervation of afferent fibers in vagus and splanchnic nerve was partially effective. Central neural pathways sensitive to capsaicin may mediate formation of both gastric and hepatic injury resulting from stress.     

The Effect of Sildenafil on an Animal Model for Ischemic Colitis

Introduction Sildenafil both enhances vasodilatation by relaxing the smooth muscle in the vessels and inhibits platelet aggregation. We have therefore examined the potential benefits of sildenafil on an animal model for ischemic colitis (IC). Methods Twenty-eight female Wistar albino rats weighing 250–300 g were randomized into three experimental groups as follows: in Group 1, animals were sham operated (n = 8) and received tap water; in Groups 2 and 3, the rats underwent a standardized surgical procedure to induce IC (n = 10 in each group). Group 2 animals served as the controls, receiving only tap water, while Group 3 animals received 10 mg/kg sildenafil per day as a single dose for a 3-day period. All animals were sacrificed 72 h after devascularization. To determine the severity of the ischemia, we scored the macroscopically visible damage, measured the ischemic area and scored the histopathology. Tissue malondialdehyde levels were also evaluated. Results The mean area of ischemic changes were 116.80 ± 189.93 and 0.55 ± 1.01 mm² in Group 2 and 3 animals, respectively (p = 0.0001), while the macroscopically mean visible damage score decreased to 0.66 ± 0.70 (p = 0.0001) for Group 3 animals. The Chiu scores were 0.00, 3.80 ± 0.91 and 2.66 ± 1.00 in Group 1, 2 and 3 animals, respectively. There was a statistically significant difference between Group 2 and 3 animals (p = 0.017). Conclusions Our findings support the view that sildenafil leads to a improvement in IC due to its well-known effects on the vascular smooth muscle and on the microcirculatory hemodynamics.     

Diagnostic efficiency of serum lipid-bound sialic acid level in malignant pleural effusions

In this study, pleural fluid and serum lipid-bound sialic acid (LBSA) levels of 68 cases with pleural effusion hospitalised at the department of Chest Diseases in the Medical School of Sel?uk University, and serum LBSA levels of 30 healthy individuals as control group were studied. Pleural effusions of 32 cases were due to malignancy of which considerably lung cancer. In the other 36 cases the causes were nonmalignant in origin. Levels of mean serum LBSA in malignant and benign groups were significantly higher than control group (p< 0.001). However, difference of the mean serum LBSA levels of malignant and benign groups was not statistically significant. We found the mean pleural fluid LBSA level of 23.34 mg/dL in malignant group and it was significantly higher than benign group (17.97 mg/dL) (p< 0.05). It was observed that there was no significant statistical difference between the pleural fluid to serum LBSA ratios of malignant and benign groups. In differential diagnosis of malignant pleural effusions, sensitivity and specificity of pleural fluid LBSA were 91%, and 51%, respectively. In conclusion, for the differentiation of malignant pleural effusions LBSA is not believed to be a reliable tumor marker since it may also increase in various chronic and inflammatory diseases. Despite of that, in cases with a suspicion of malignancy, the increased level of pleural fluid LBSA may be useful as a supportive parameter.     

Aortic elastic properties in patients with coronary artery ectasia.

BACKGROUND: The purpose of the present study was to investigate the elastic characteristics of the aorta in patients with coronary ectasia (CE) and the relationship between these characteristics and echocardiographic left ventricular (LV) diastolic functions. METHODS AND RESULTS: In the first group there were 35 patients with CE, the second group consisted of 35 patients with coronary artery disease (CAD) and the third group consisted of 35 patients with normal coronary arteries. Echocardiographic investigation was carried out for the assessment of the LV diastolic functions. Aortic strain, beta index and aortic distensibility were used as aortic elasticity parameters. LV diastolic functions were impaired in both the ectasia group and the CAD group as compared with patients with normal coronary arteries. Beta index and aortic distensibility measurements were similar between the CAD and CE groups. The values obtained for aortic strain, beta index and aortic distensibility were lower in the CAD and ectasia groups when compared with the values of the normal group. On performing the stepwise linear multivariable analyses, aortic elastic parameters have been determined to possess the strongest diagnostic power for LV diastolic functions. CONCLUSIONS: The results of the current study show that stiffness parameters of aorta are impaired in the patients with CE as in the patients with CAD. The increase in aortic stiffness might be responsible for LV diastolic dysfunction.