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Biomedical subjects

G Yilmaz

Publications and source records attributed to G Yilmaz.

50 records · Page 3Linked to original sources
PubMed1998

Central diabetes insipitus in a patient with congenital toxoplasmosis.

A 33-day-old male infant who developed central diabetes insipitus as a complication of congenital toxoplasmosis is presented. He had polyuria and hypernatremia on admission and responded to Intranasal desmopressin acetate with the normalization of above mentioned findings. Computed tomographic (CT) scan of the brain showed obstructive hydrocephaly with periventricular and right basal ganglion calcification. CT scan of the pituitary gland, thyroid function tests, and serum cortisol levels were all normal. This is the first report of isolated diabetes insipitus with congenital toxoplasmosis in literature and central diabetes insipitus should be remembered if polyuria and hypernatremia develops in a patient with congenital toxoplasmosis.

Diabetes Insipidus↗
PubMed1996

Antibodies reactive with HIV-1 antigens in systemic lupus erythematosus.

Antibodies reactive with retroviral gag proteins have been detected in patients with systemic lupus erythematosus (SLE). We investigated the immune responses against human immunodeficiency virus (HIV) 1 antigens in the sera of 44 Turkish patients with SLE. Serum samples were tested by using two different commercial enzyme immunoassay (EIA) kits and by Western blotting. EIA studies revealed positive results in 12 patients (27%) for HIV-1 antigens by one of the kits that coated with purified viral antigens. Immunoblot analysis showed antibodies mainly to retroviral gag proteins in 23 patients (52%). The most frequent reactivity was against the p18 gag protein (n = 9). Although antibodies reactive particularly with p24 antigen were described in the previous reports, antibodies to p24 were found in only two patients. These findings might reflect a serologic diversity in different ethnic groups and also suggest the involvement of different triggers in the etiopathogenesis of SLE.

Adolescent↗
PubMed1995

Effect of acute and chronic inhaled furosemide on bronchial hyperresponsiveness in mild asthma.

We determined whether chronic administration of furosemide aerosol would be beneficial for the treatment of asthma. First, we showed that furosemide aerosol delivered from a metered-dose inhaler (10 and 20 mg) significantly protected against sodium metabisulfite (MBS) challenge by 0.6 and 1.3 doubling dilutions respectively in 12 volunteers with mild asthma. In a double-blind cross-over study, we examined the effect of furosemide aerosol from a twice more efficient metered-dose inhaler (10 mg four times per day) inhaled over 4 wk versus placebo in 12 other asthmatic subjects. There was no significant effect of furosemide on bronchial responsiveness to methacholine or MBS. Treatment with furosemide over 1 mo did not improve bronchial hyperresponsiveness in subjects with mild asthma.

Administration, Inhalation↗
PubMed1994

Importance of serum anticardiolipin antibody levels in coronary heart disease.

During the past 10 years it has been shown that some patients with antibodies to phospholipids develop recurrent venous and arterial thromboses, repeated fetal loss, and thrombocytopenia. The aim of this study is to determine the importance of levels of serum anticardiolipin antibodies (ACA) in patients with coronary heart disease (CHD). The study population consisted of 76 CHD patients (Group 1) and 22 healthy subjects (Group 2). Group 1 comprised three subgroups: (1a) 32 patients with acute myocardial infarction (MI), (1b) 22 patients with chronic CHD and a history of MI, and (1c) 22 patients with CHD but without previous MI. Immunoglobulin G anticardiolipin antibodies (IgG ACA) and immunoglobulin M anticardiolipin antibodies (IgM ACA) were detected by ELISA. High IgG ACA levels were found in 36 patients (47%) in Group 1, but no high levels were found in the control group. IgM ACA levels showed no significant difference between the two groups. The ACA (IgG and IgM) levels showed no correlation with age, gender, risk factor profiles, platelet counts, coronary artery lesions, left ventricular function, and morbidity and mortality rates during the follow-up period of 22 months. As a result, measurement of ACA in CHD patients is unlikely to yield information that is diagnostically or prognostically important. The importance of serum anticardiolipin antibody levels in the natural history and prognosis of CHD is still undetermined and remains to be clarified.

Adult↗
PubMed1987

Modulation by endothelium of the vascular effects of angiotensin II.

Modulation by vascular endothelium of the effects of AII was studied in the isolated rabbit aortic and superior mesenteric artery strips. The contractile effect of AII was enhanced in rubbed aortic strips. Similar enhancement was obtained in hydroquinone pretreated unrubbed strips. The relaxing effect of acetylcholine in AII--induced precontracted aortic strips was abolished after rubbing and hydroquinone pretreatment. However, no significant changes were observed in the contractile response to AII on aspirin and nicotine pretreated strips. In the isolated mesenteric artery strips AII produced a biphasic responses. The contractile effect of AII was enhanced in rubbed strips. Similar potentiation was also obtained in hydroquinone, aspirin and nicotine pretreated unrubbed strips. The relaxation phase of AII response was completely abolished in rubbed strips but partially inhibited in hydroquinone, aspirin and nicotine pretreated unrubbed strips. From these results it was concluded that EDRF is the main endothelial humoral factor which modulates the effect of AII in the rabbit aorta while both EDRF and PGI2 are involved for the modulation of the effects of octapeptide in the mesenteric artery.

Acetylcholine↗
PubMedDate not supplied

Role of the vitreous in age-related macular degeneration.

PURPOSE: To investigate the relationship between posterior vitreous detachment (PVD) and age-related macular degeneration (AMD). METHODS: The condition of the vitreous was examined by slit-lamp funduscopy and ultrasonography in 93 eyes of 50 patients with AMD (exudative or dry) and 100 eyes of 50 controls. RESULTS: There was complete PVD in 31 of the 93 eyes (33.3%) of 50 patients with AMD and the posterior vitreous was attached in 62 of these eyes (66.6%). In the control group, in 50 eyes (50%) of 50 subjects there was posterior vitreous detachment. The prevalence of PVD in eyes with macular degeneration was significantly lower (P < .05). There was no statistically significant difference between the exudative and the nonexudative groups in respect to PVD. CONCLUSIONS: PVD may have a protective role against the development of AMD. Chronic vitreomacular traction and/or continuous exposure to free radicals and cytokines may possibly be one of the causes of AMD in eyes with attached vitreous.

Aged↗
PubMedDate not supplied

A study of serological markers of hepatitis B and C viruses in Istanbul, Turkey.

OBJECTIVE: This study was undertaken to investigate the prevalence of HBsAg, anti-HBs and anti-HCV positivity in Istanbul, Turkey. SUBJECTS AND METHODS: The frequencies of HBsAg, anti-HBs and anti-HCV positivity were determined in 1,157 randomly selected patients attending the outpatient clinic of Istanbul University Hospital, Istanbul, Turkey, during the years 1998 and 2001. All patients underwent complete physical and various routine laboratory examinations. RESULTS: Of the 1,157 patients, the prevalence of HBsAg, anti-HBs and anti-HCV was 6.6, 28.1 and 2.4%, respectively. It appeared that having dental and surgical procedures formed the risk factors for HBV infection. HBsAg positivity in the health care workers was not different from that of the other professions, but anti-HBs was significantly higher in this group. CONCLUSIONS: Our findings indicate that HBV infection occurs more frequently than HCV in Istanbul, and this poses an important health problem in the community.

Adolescent↗
PubMedDate not supplied

Retinal arterial macroaneurysm in a young patient with chronic renal failure.

PURPOSE: To report the youngest case of retinal arterial macroaneurysm. METHOD: Case Report. RESULTS: Clinical examination and fundus fluoroscein angiography revealed retinal arterial macroaneurysm in a 23-year-old patient with chronic renal failure. CONCLUSIONS: Acquired macroaneurysm may develop even in a very young patient, especially with chronic renal failure.

Adult↗
PubMedDate not supplied

Retinal vein occlusion and factor V Leiden and prothrombin 20210 G:A mutations.

PURPOSE: The aim of this study was to establish whether the factor V Leiden mutation and the prothrombin 20210 G:A mutation were risk factors for retinal vein occlusion. METHODS: Blood samples were obtained from 40 patients with retinal vein occlusion and from 50 healthy normal volunteers as controls. Polymerase chain reaction assays were done to detect factor V Leiden and prothrombin 20210 G:A mutations, and the two groups were compared. RESULTS: Two (5%) of 40 patients with retinal vein occlusion and three (6%) of 50 controls were heterozygous for factor V Leiden (p=0.84). None of the individuals in either group had the prothrombin 20210 G:A mutation. CONCLUSIONS: There was no significant association between retinal vein occlusion and the factor V Leiden mutation.

Adult↗
PubMedDate not supplied

Trends in major transfusion-transmissible infections among blood donors over 17 years in Istanbul, Turkey.

Infection with hepatitis B virus (HBV), hepatitis C virus (HCV), human immunodeficiency virus (HIV) and syphilis are serious complications of blood transfusion. These infections are routinely screened by blood banks; such tests are obligatory for transfusion safety in Turkey. The results of screening 1 737 943 blood donations from blood centres in Istanbul between 1 January 1987 and 31 December 2003 for HBV, HCV, HIV and syphilis were analysed retrospectively. Hepatitis B surface antigen rates fell from 5.98% in 1987 to 2.07% in 2003. Anti-HCV seropositivity was found to be approximately 0.5%, whereas anti-HIV seropositivity was approximately 0.001%. Rapid plasma reagin rates (test for syphilis) were 0.04% in 1987, and increased to 0.2% in 2002. The decreasing trends observed in data from the 17-year period studied indicate the value of safety measures taken, in particular the implementation of donor screening procedures in 1997.

Blood Banks↗
PubMedDate not supplied

Retinal tears associated with panuveitis and Behçet's disease.

To report retinal tears formation in 3 eyes of 2 patients with active panuveitis and Behçet's disease. We describe 2 patients that were diagnosed and treated for Behçet's disease with active panuveitis. Retinal tears developed while the inflammation was active. The patients were treated with topical, oral steroids, and cyclosporine therapy for bilateral panuveitis. One patient presented with a retinal tear located at the periphery of the active retinal lesion. The other had multiple tears associated with active retinal lesions in both eyes. Argon laser photocoagulation was performed in both patients as soon as the tears were detected. Ocular inflammation was controlled with this therapy, and only a few mild flare-ups occurred. The patients have been followed up for 8 and 16 months, respectively. During this period no new retinal tears have developed. Although retinal tear formation is rarely associated with Behçet's panuveitis, the clinician should be aware of this as a possible complication. When structural changes are present in the vitreous, detailed ophthalmoscopy is indicated to assess for retinal tears. If a tear is detected in a patient with panuveitis and Behçet's disease, laser photocoagulation therapy should be performed immediately to prevent retinal detachment.

Adult↗
PubMedDate not supplied

Occurrence of an aortic arch anomaly in two siblings born to a diabetic mother.

A patient with interruption of aortic arch type A, born to a diabetic mother, is described. The patient, a male infant, was the fourth child of a 29-year-old mother, and had a sibling with coarctation of the aorta. The mother had been treated for insulin-dependent diabetes mellitus for the previous 10 years. The infant died on the 3rd day of life after symptoms of cardiogenic shock. To our knowledge, interruption of aortic arch type A has not been previously described in infants of diabetic mothers. The relevance of the case is discussed and the literature reviewed.

Adult↗
PubMedDate not supplied

A preliminary study on IL4 levels in extrinsic atopic asthmatic children.

Interleukin 4, (IL4) known as a lymphokine secreted by type II helper T-cells, is thought to regulate IgG and IgE secretions. Therefore, elevated IL4 levels are expected in atopic allergic disease and parasitoses. The purpose of this study was to determine IL 4 levels in allergic asthmatic children. In 50 extrinsic atopic children (19 females, 31 males, mean age 8 +/- 4), IgE and IL 4 were found to be 469 +/- 296 U/L and 0.318 +/- 0.09 ng/ml, respectively. In seven control cases, IgE and IL4 levels were 62 +/- 25 and 0.106 +/- 0.017, respectively. Comparison of the two groups disclosed statistically significant differences in IL4 and IgE levels, suggesting the ability of IL4 to augment IgE production.

Adolescent↗