Zuzana Semanová

Pavol Jozef Šafárik University in Košice, Košice, Kosicky Kraj, Slovakia

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Publications (5)3.61 Total impact

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    ABSTRACT: Is there a difference between the retinol-binding protein 4 (RBP4) levels in obese patients with insulin resistance (IR) without diabetes, in obese patients with type 2 diabetes mellitus (DM2T) treated with metformin and in nonobese healthy individuals? 28 obese individuals with insulin resistance, 11 type 2 diabetes patients treated with metformin and 17 control individuals were examined for serum level of retinol-binding protein 4 using the RIA method. The results were compared within the groups and RBP4 was correlated with insulin in the IR group and the control group. The highest and the lowest RBP4 levels (561.6 +/- 209 ng/ml) were recorded, respectively, for obese individuals with IR (IR HOMA 3.9) and for obese type 2 diabetics treated with metformin (391.1 +/- 133,5 ng/ml) (P < 0.01). The RBP4 level of the control group was significantly lower as compared with the obese individuals with IR (452.8 +/- 104.6 ng/ml) (P < 0.05), but insignificantly higher as compared with the obese individuals with DM2T treated with metformin (391,1 +/- 133.5 ng/ml). RBP4 in the monitored group correlated with insulin r = 0.46 (p < 0.03). The increase in RBP4 in obese individuals by GLUT4 regulation in adipocytes contributes to the development and aggravation of systemic IR. Through its effect on RBP4 expression in adipocytes, metformin may improve total insulin sensitivity in obese individuals including those with MS and delay the onset of manifest DM. RBP4 could by used as a marker of deteriorating glucose tolerance in obese individuals.
    Vnitr̆ní lékar̆ství 09/2007; 53(9):960-3.
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    ABSTRACT: To search whether there are differences in serum levels of adiponectin in subjects with metabolic syndrome (MS) as compared to the healthy controls. Serum levels of adiponectin were measured by ELISA in 22 subjects with MS (MS group: 9 males and 13 females, average age +/- SD 43.19 +/- 6.16) and in 17 healthy controls of about the same age (CONT group: 8 males and 9 females, average age +/- SD 45.88 +/- 11.6). All subjects of MS group had BMI >30 and also other criteria of MS (e.g. obesity, insulin resistance, possible disorders of glucose metabolism, dyslipidemia and hypertension) were manifested in all of them. Adiponectin levels in serum were compared between the groups and also within the pooled MS plus CONT group the interrelations between serum levels of adiponectin and BMI, serum fasting insulin (estimated by RIA method) and smoking were examined. For statistical processing one way ANOVA or its non-parametric parallel (Kruskal-Wallis one-way analysis) as well as regression and correlation analysis were used. Subjects with MS syndrome had significantly higher BMI, systolic and diastolic BP, fasting glycemia and insulin level. Significantly higher were also the values of both indexes of insulin resistance such as IR(HOMA) and IR(QUlCKI). In contrast, however, MS group had significantly lower adiponectin level than CONT group. There was no difference between the average age of both groups. In pooled MS plus CONT group inverse correlations were found between serum levels of adiponectin on one side and BMI and fasting insulin level on the other, while the level of adiponectin between smokers (which was declared by 18/39 subjects) and non-smokers did not show any influence on serum levels of adiponectin. Low level of adiponectin in obese individuals may be considered as a marker predicting a possibility of the development of metabolic syndrome. It is suggested that early regulation of serum adiponectin levels in obese subjects by treatment of obesity, especially in young ones, could result in a lowering the risk of mainly cardiovascular diseases associated with MS.
    Endocrine regulations 03/2006; 40(1):15-9.
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    ABSTRACT: Thyroid volume (ThV) and echogenicity by ultrasound were estimated in 324 schoolchildren (aged between 10 and 13-years) from high nitrate area (HNA) located in agricultural lowland with high nitrate drinking water supply (51-274 mg/l) from shallow wells. The data were compared to children of the same age from low nitrate area (LNA) consisting of 168 children from the neighboring area with very low nitrate (< 2 mg/l) drinking water and of 596 children from the city of Kosice located in a vicinity of LNA and also supplied by low nitrate water. Blood samples were obtained from 315 willing children from HNA and 109 children from LNA and the levels of thyrotropin (TSH), total thyroxine (TT4), free triiodothyronine (FT3) and thyroperoxidase antibodies (anti-TPO) in serum were determined. ThV (mean +/- SE) in 10-year (5.10 +/- 0.14 ml) and 13-year (5.97 +/- 0.11 ml) old children from HNA was significantly higher than that in two groups of respective age from LNA, 4.58 +/- 0.17 (p < 0.02) and 5.23 +/- 0.15 ml (p < 0.05), and from the city of Kosice, 4.77 +/- 0.10 ml (p < 0.05) and 4.87 +/- 0.1 0ml (p < 0.0001). The frequency of hypoechogenicity in HNA was also significantly higher than that in pooled LNA plus Kosice, 13.7% vs. 4.7% (p < 0.01) in 10-year and 10.6% vs. 5.7% (p < 0.03) in 13-year, respectively. The frequency of TSH level in the range of subclinical hypothyroidism (> 4.0 mU/l) in pooled age groups from HNA was 13/324 (4.0%) and that of positive anti-TPO was 8/324 (2.5%), while no case of either increased TSH or positive anti-TPO was found in 109 children from LNA. Finally, no differences in the levels of TT4 and FT3 were found between HNA and LNA. It was concluded that long-term exposure to high nitrate intake by drinking water and home made meals from local products results in increased thyroid volume and increased frequency of signs of subclinical thyroid disorders (thyroid hypoechogenicity by ultrasound, increased TSH level and positive anti-TPO).
    Chemosphere 01/2006; 62(4):559-64. · 3.14 Impact Factor
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    ABSTRACT: The authors compared the size of the thyroid gland, assessed by ultrasonographic examination of its volume and the functional state of the thyroid by examination of the serum level of TSH and anti-TPO antibodies in 492 pupils aged 10 and 13 years in two close agricultural areas. The areas differed above all as to the nitrate content of drinking water. In communities where the source of drinking water were private wells (nitrate area), as much as 68.1% of the water samples had a nitrate content > 50 mg/l and 46.4% samples > 100 mg/l. In communities where the source of drinking water was a water main with a known source (control area) the water samples did not exceed 50 mg/l (73.7% > 15 mg/l and 26.3% > 50 mg/l. Results: Pupils from the nitrate area had a larger thyroid gland similarly as older pupils from the control area. A volume above 7 ml/m2 in the nitrate area was recorded in the group of 10-year olds in 25/99 (27.7%) and in the group of 13-year-old ones in 33/154 (21.4%), while in the control area it was in the 10-year-old ones 11/92 (11.9%) and in the 13-year-old ones 16/156 (10.2%, P < or = 0.01). In the nitrate area TSH > 5 mIU/l was recorded in 5.6% and higher anti-TPO antibodies in 2.6% pupils. In the control area the corresponding figure was 1.1% pupils, P < or = 0.01.
    Vnitr̆ní lékar̆ství 11/2000; 46(11):764-7.
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    ABSTRACT: Thyroid gland ultrasonography is recommended in patients with nonspecific clinical symptoms such as fatigue, weight gain, dry skin, amnesic symptoms, depression, bradycardia, abnormal myocardial contractility, increased diastolic pressure, hypercholesterolemia, menstrual abnormalities, infertility, fibrocystic breast disease, anxiety, insomnia, tachycardia, paroxysmal atrial fibrillation and osteoporosis. Subclinical hypothyroidism or hyperthyroidism can cause any of the above mentioned symptoms. Diffusely decreased, decreased and inhomogenous thyroid gland echogenicity requires laboratory examination. Thyroid gland ultrasonography is recommended also in patients with type I. diabetes mellitus and vitiligo because of increased incidence of thyroid disorders in these patients. Clinical observation of patients treated with Lithium, Amiodaron or Interferon is also recommended. (Tab. 2, Fig. 6, Ref. 18.)
    Bratislavske lekarske listy 05/1999; 100(4):196-9. · 0.47 Impact Factor