Relationship between thyroid function and endothelium dysfunction in hemodialyzed patients

Chronic renal failure affects thyroid function in many ways. Disturbances in hemostasis and inflammation are common complications of kidney diseases. Endothelial dysfunction may link these two processes. The study was performed to assess thyroid hormones in relation to markers of endothelial damage and inflammation in hemodialyzed [HD] patients. Sixty patients on regular HD [40 patients treated with erythropoietin and 20 patients without erythropoietin therapy] and 30 healthy controls were studied. Thyroid hormones, markers of endotherlial damage [Von Willebrand factor [vWF], intracellular adhesion molecule [ICAM], marker of inflammation [high-sensitivity C-reactive protein [hsCRP] and tumor necrosis factor alpha [TNF alpha], hemostatic parameter [tissue plasminogen activator [tPA], kidney function tests, complete blood count, lipid profile, serum iron, serum albumin and total protein, serum calcium and phosphate were measured. The weekly erythropoietin dose and the patient demographics were recorded. Free T[3] were lower in HD patients compared with controls, markers of hemostasis, inflammation and endotherlial dysfunction were significantly higher in HD patients compared with controls. In all hemodialysis patients, free T[3] was independently related to time on dialysis, albumin, serum iron, total protein, triglycerides, total calcium, vWF, tPA and hsCRP. In the HD patients with CRP less than 6 mg/L, free T[3] was related to time on dialysis, total protein and triglycerides. While in HD patients with CRP greater than or equal to 6 mg/L, free T[3] was related to total calcium and hsCRP. Also in multiple regression analysis the predictors of free T[3] were hsCRP and dose of erythropoietin. We describe a novel relation between thyroid hormones and markers of endothelial dysfunction and inflammation in HD patients. Thyroid dysfunction is related to time on dialysis, endothelial damage, and inflammatory state, frequently encountered in uremia could be responsible for accelerated atherosclerosis and development of cardiovascular complications. Therefore, the relations between thyroid axis and endothelium in HD subjects merit additional studies

Proteinuria as a risk factor for stroke in type 2 diabetes mellitus

The study was designed to assess the relation between proteinuria and stroke in patients with type 2 diabetes mellitus. The study was conducted on two groups; Group I included 60 patients with type 2 DM with ischemic stroke, group II included 60 patients with type 2 DM without stroke. Both groups were matched by age, sex, body mass index and duration of diabetes. The study was performed at Al-Azhar University Hospitals from May 2005 to January 2006. The patients were evaluated clinically using Glasgow Coma Scale [GCS] for comatose patients and Canadian Neurological Scale [CNS] for conscious patients. Routine laboratory investigations as well as 24 hours urine protein were measured for both groups. CT scans were performed to all patients of group I within two days and after one week from the onset of stroke to determined site, depth and size of infarction. Systolic and diastolic blood pressures, prevalence of smoking and 24 hours proteinuria were significantly higher in group I than group II. On the other hand no significant changes were found on duration of DM, fasting and postprandial blood sugar, total cholesterol, LDL cholesterol, triglycerides, HbAlc, age and gender between two groups. In group I 38 patients were found to have proteinuria 38/60 [63%] versus 16 patients 16/60 [26.7%] had proteinuria in-group II, which was statistically significant. HDL-cholesterol only was significantly lower in-patients with proteinuria than those without proteinuria in-group I [p<0.01]. On the other hand no significant correlations were found between proteinuria and severity of strokes and CT findings. In multivariate logistic regression analysis, the ORs and 95% CLs for the variables identified as risk factors for stroke were as follow; SBP [OR 14.5, 95% CL 2.5-13.9], DBP [OR 13.1, 95% CL 2.4-15.9], proteinuria [OR 7.6, 95% CL 2.5-22.9], HDL cholesterol [OR 5.5,95% CL 2.1-23.5] and smoking [OR 4.89, 95% CL 1. 7-22.3]. Our results give evidence that proteinuria is an independent risk factor for ischemic stroke in patients with type 2 DM. Further support from additional prospective studies is recommended to confirm these findings

Pulmonary function tests in Parkinson's disease

The study was a cross-sectional and patient-control study. The study was performed at Al-Azhar university Hospitals from May 2005 to January 2006. The study was performed to document changes in respiratory pump and ventilatory function in idiopathic Parkinson's disease [PD] patients and its relationship with the main clinical presentation and the specific daily living activities [DLA] inthose patients. The study was conducted on 30 patients with PD and 10 healthy control volunteers. Patients were subjected to clinical evaluation by Unified Parkinson Disease Rating Scale [UPDRS] and respiratory pump function evaluation was done for patients and controls. Among patients group, 3 patients had normal pulmonary function [PF], 15 had obstructive PF pattern, 2 had restrictive PF pattern and 17 had upper airway obstruction. A significant disturbance in respiratory neuromuscular drive represent by the tracheal occlusion pressure after 100 m / sec from the start of quit inspiration [PO.l], decrease in respiratory muscle strength evaluated by maximum inspiratory pressure [PImax], marked respiratory muscle fatigue evaluated by [PO.l / PO.lmax]. A significant decrease in partial arterial oxygen pressure [PaO[2]] and increase in PaCO2 was found in patients group when compared to control group. Rigid / hypokinetic group patients 16/30 [53.3%] had significant [p<0.05] respiratory dysfunction rather than tremulous 14/30 [46.7%] group of patients. A significant negative correlation between the duration of disease, severity of illness, total daily living activity [DLA] and the severity of pulmonary dysfunction was found. Among the specific DLA, salivation and severe axial involvement was negatively correlated with maximum voluntary ventilation [MVV], PImax and PaO[2] Patients with Parkinsonis disease have impaired pulmonary function showing both obstructive and restrictive pattern, also abnormalities in mouth occlusion pressure and maximum inspiratory pressure were evident

Assessment of thyroid function and autoantibody in type 2 diabetes mellitus

The associations between type 1 diabetes mellitus [DM] and autoimmune thyroid disease and other autoimmune diseases have long been recognized. However, these associations in type 2 DM are not certain. The study was performed to assess the thyroid function and autoimmune thyroiditis by detection of thyroglobulin antibodies [TG-ab] and thyroid peroxidase antibodies [TPO-ab] in type 2 diabetes mellitus. The study included 50 patients with type 2 diabetes over 10 years duration and 20 control subjects. The study was performed at Al-Azhar University Hospitals for control or management of diabetic complications. Patients with non-thyroidal illness or drug therapy, which known to affect thyroid functions were excluded from the study. The subjects of this study were submitted to the following: complete history and clinical examination, BMI, blood sugar, lipid profile, thyroid function test [FT3, FT4, and TSH], HbAlc and thyroid autoantibodies [Tg-ab and TPO-ab]. Twenty-six patients out of 50 having abnormal levels of TSH, 6 of them below the normal reference range, while the other 18 patients with elevated TSH levels. Patients with elevated TSH had significantly lowered serum FT3, FT4 and elevated levels of TPO-ab, TG-ab, HbAlc, disease duration and BMI when compared to those with normal TSH [p<0.01, for all]. Patients with decreased levels of TSH had significantly elevated levels of FT3, FT4, HbAlc and BMI when compared to those with normal TSH [p<0.01], but no significant changes were found in serum levels of autoantibodies. Interestingly the incidence of abnormal thyroid function and elevated thyroid auto-antibodies were significantly higher in patients treated by insulin [70%] versus those treated by oral hypoglycemic drugs [30%], [p<0.01]. Twenty two patients out of 50 [44%] had elevated TPO-ab levels, 13 of them have TSH abnormality, 12 of these 13 patients have subclinical hypothyroidism and one has subclinical hyperthyroidism. 25 patients of 50 [50%], have increased level of TG-ab, 18 of them have abnormal TSH values, 16 out of these 18 have subclinical hypothyroidism and two patients have subclinical hyperthyroidism. Serum level of TSH only was significantly higher in females than males [p<0.05]. Serum levels of autoantibodies were correlated positively with serum levels of TSH, BMI, HbAlc, disease duration and insulin therapy and correlated negatively with FT3 and FT4. Type 2 diabetes may be associated with alteration in thyroid function especially subclinical hypothyroidism that is not fully explained by the mere presence of antithyroid antibodies

Role of adhesion molecules in vascular complications of type 2 diabetes mellitus

The present study was undertaken to evaluate the plasma levels of soluble adhesion molecules [intercellular adhesion molecule-1 [ICAM-1] and vascular cell adhesion molecule-1 [VCAM-l] in type 2 DM to elucidate its potential involvement in pathogenesis of diabetic vascular complications and its association with other independent risk factors for diabetic atherosclerosis. The study was conducted on 60 patients with type 2 DM [27 with vascular complications Vs. 33 without vascular complications, assessed by fundus examinations] and 20 healthy controls, at Al-Azhar University Hospitals between March 2004 to August 2004. Serum levels of ICAM-l and VCAM-l in association with fasting blood sugar, fasting insulin and insulin resistance were measured, as wall as lipid profile, plasminogen activator inhibitor [PAl] and factor VII. Serum levels of ICAM-1 and VCAM-1 were significantly higher in type 2 diabetic patients with vascular complication than those without vascular complications, but no significant changes in their levels were found between patients without vascular complications and controls. Serum levels of ICAM- 1 and VCAM- I were significantly correlated with other studied parameters in patients with and without vascular complications except fasting serum insulin levels. Serum levels of insulin resistance [IR] and lipid profile were significantly higher in patients with type 2 DM than controls and in patients with vascular complications than those without vascular complications. Serum levels of fasting blood glucose, factor VII and PAl were significantly higher in diabetic patients with and without vascular complications than controls, on the other hand no significant changes was found between patients with and those without vascular complications. The present study suggested that the levels of soluble adhesion molecules in type 2 DM with dyslipidaemia, hyperinsulinemia and hypercoagulable state may be a marker of endothelial cell activation or dysfunction and may be related to the activity of multiple cell types in atherosclerotic lesion. Serum levels of ICAMs were closely related to vascular diabetic complications. Furthermore, they may serve as a tool for monitoring the impact of prevention and intervention on vascular damage