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Biomedical subjects

M Simko

Publications and source records attributed to M Simko.

At least 19 recordsLinked to original sources
PubMed2006

ROS release and Hsp70 expression after exposure to 1,800 MHz radiofrequency electromagnetic fields in primary human monocytes and lymphocytes.

The aim of this study is to investigate if 1,800 MHz radiofrequency electromagnetic fields (RF-EMF) can induce reactive oxygen species (ROS) release and/or changes in heat shock protein 70 (Hsp70) expression in human blood cells, using different exposure and co-exposure conditions. Human umbilical cord blood-derived monocytes and lymphocytes were used to examine ROS release after exposure to continuous wave or different GSM signals (GSM-DTX and GSM-Talk) at 2 W/kg for 30 or 45 min of continuous or intermittent (5 min ON/5 min OFF) exposure. The cells were exposed to incubator conditions, to sham, to RF-EMF, or to chemicals in parallel. Cell stimulation with the phorbol ester phorbol-12-myristate-13-acetate (PMA; 1 microM) was used as positive control for ROS release. To investigate the effects on Hsp70 expression, the human monocytes were exposed to the GSM-DTX signal at 2 W/kg for 45 min, or to heat treatment (42 degrees C) as positive control. ROS production and Hsp70 expression were determined by flow cytometric analysis. The data were compared to sham and/or to control values and the statistical analysis was performed by the Student's t-test (P<0.05). The PMA treatment induced a significant increase in ROS production in human monocytes and lymphocytes when the data were compared to sham or to incubator controls. After continuous or intermittent GSM-DTX signal exposure (2 W/kg), a significantly different ROS production was detected in human monocytes if the data were compared to sham. However, this significant difference appeared due to the lowered value of ROS release during sham exposure. In human lymphocytes, no differences could be detected if data were compared either to sham or to incubator control. The Hsp70 expression level after 0, 1, and 2 h post-exposure to GSM-DTX signal at 2 W/kg for 1 h did not show any differences compared to the incubator or to sham control.

Antigens, CD↗
PubMed2005

Short communication: hydroperoxides in circulating lipids from dairy cows: implications for bioactivity of endogenous-oxidized lipids.

This study was conducted to investigate the potential for increased oxidative stress of high- vs. average-producing dairy cows. Two experiments were performed using 11 and 13 Holstein cows (53 +/- 2 d postpartum). Lipohydroperoxides (LHP) were determined in serum lipids (experiment 1) and low-density lipoprotein (experiment 2) via oxidation of ferrous to ferric ions through LHP using thiocyanate as chromogen. In experiment 1, differing milk yield and milk energy output corresponded to different concentrations of LHP. In experiment 2, analysis of regression resulted in a significant relationship between milk yield and LHP. Phospholipids isolated from lipids with 6.5 microM of LHP evoked in monocytic cells a transient increase in superoxide formation, indicating inflammatory potential. The results show that high milk productivity can associate with oxidative stress indicated by oxidative modifications of circulating lipids and their changed bioactivity.

Animals↗
PubMed2002

[Changes in serum levels of lipid peroxidation products during labor and in the puerperium].

OBJECTIVE: To determine the activity of reactive oxygen species (ROS) during labour by characterizing changes in maternal serum levels of lipid peroxidation end-products--MDA and lipofuscin during labour and the early post-partum period. We also tried to evaluate the relationship between levels of lipid peroxides and some clinical characteristics of labour. DESIGN: Prospective study. SETTING: Department of Obstetrics and Gynaecology LFUK, Bratislava; Department of clinical laboratories, Ministry of defense SR, Bratislava. METHODS: Blood samples were obtained from 66 pregnant women with uncomplicated pregnancy at the end of labour and during the early post-partum period. The control group consisted of 19 pregnant women delivering by primary Cesarean section. Blood samples were examined for MDA and lipofuscin by HPLC method. We used paired and unpaired Student's t-test to statistically evaluate our results. RESULTS: MDA and lipofuscin levels in pregnant women delivering spontaneously compared to those delivering by C-section were significantly elevated (P < 0.05). MDA and lipofuscin levels in pregnant women during spontaneous labour or during by C-section compared to the levels in early post-partum period were not significantly increased. We have not found any correlation between the length of the labour and lipoperoxides concentration.

Adolescent↗
PubMed2001

An entirely suprasellar Rathke's cleft cyst: case report and review of the literature.

Rathke's cleft cysts usually present with an intrasellar or a combined intrasellar and suprasellar localization. In this report we present a 58-year-old man with a Rathke's cleft cysts in an entirely suprasellar location with intact diaphragm and intact sella. Although this presentation of a Rathke's cleft cyst is extremely rare, it belongs in the differential diagnosis of entirely suprasellar lesions. The relevant literature is discussed.

Central Nervous System Cysts↗
PubMed1997

[Epileptic seizures and immune disorders].

UNLABELLED: The links of epileptic seizures with febrile diseases, as well as with common infections are generally known. Similarly, physicians are aware of the coincidence of epileptic activity with immunity disturbances, as well as of the effects of the antiepileptic drug phenytoin on the immunity system. Disturbances of immunity are commonly reported in 30% of the population. Our clinic is a consilliary regional centre for torpid epilepsies and sleep defects. The aim of study is to document the occurrence of immunity disturbances in unsuccessfully treated patients (5-25 years of age) with generalised convulsive epilepsy (GENKONV-GK) in a group containing 50 patients, and with partial epilepsy with complex symptomatology (PARTKOMP-PK) in a group containing 75 patients. At the same time, this studys objective resided in seeking evidence of the positive effect of immunomodulatory therapy. In all patients, the basic diagnosis had been stated in coincidence with the origin of epilepsy during hospitalisation in neurologic wards. In 1993-1995 our clinic supplemented the electrodiagnosis by a series of routine EEG which was focused at the recurrence of the disease. As a rule, each of the patients was subdued to a 24-hour EEG monitoring on the 12-canal apparatus. Individual supplementation by CT, MR and USG of the brain, the arrangement of anti-epileptic therapy and basic immunological examination were made during the first year of investigation. Still, after the stabilisation of anti-epileptic therapy (monitoring) and indicated immunomodulatory therapy was added. RESULTS: The immunologic examination was negative in 4 patients, all being members of GENKONV group. Atopy was found in 56% of GK group, and in 65% of PK group. Disturbances of specific cellular immunity were revealed in 80% of the patients of the GK group, and in 85% of PK group. The signs of inflammatory activity and other signs of allergy were present to a lesser extent. CONCLUSIONS: Out of the amount of 125 patients only 3.2% yielded no disturbances of immunity. The application of immunomodulatory therapy appears to represent a promising supplementary-stabilisation therapy. (Tab. 2, Fig. 4, Ref. 5.)

Adolescent↗
PubMed1997

[Immunomodulatory therapy of epilepsy with transfer factor].

Effect of immunotherapy with Transfer factor administered for a period of three months was studied in a group of ten epileptic patients, treated with carbamazepine or primidon previously and throughout the study. Out of eight patients, who finished the study we could notice significant reduction of epileptic discharges in eight patients. The results of this study prove that addition of immunomodulatory treatment to patients with intractable epilepsy could substantially improve the course of the disease in some patients. (Tab. 1, Fig. 5, Ref. 13.)

Adolescent↗
PubMed1994

How to produce moisture chamber eyeglasses for the dry eye patient.

BACKGROUND: Moisture chambers are prosthetic devices coupled to eyeglasses that slow the evaporation of the tears from the ocular surface. The need for moisture chamber glasses is most evident when a patient suffers from Sjögren's syndrome. This disease creates a pathologically dry eye from tear anomalies. Other ocular and systemic conditions can also cause a painfully dry eye. METHODS: The concept behind a moisture chamber is to significantly minimize the air flow over the ocular surface. The chamber provides a vapor barrier that functions passively to prevent tear evaporation. This is achieved by using a polyurethane plastic to produce a chamber contiguous with spectacles. RESULTS: The chamber provides a humid environment behind the eyeglass lens and in front of the eye surface. Before deciding to produce a moisture chamber, one should consider the extensive time consumption involved in the production of these facially contoured customized devices. CONCLUSIONS: It may take 3-6 hours for a technician who has not previously made a moisture chamber to construct the first one. As the proficiency increases, one may be able to streamline the process to approximately 3 hours. This approach was investigated because of the paucity of available information about the production of moisture chamber glasses and the acute need and benefit by pathological dry eye patients for these special glasses.

Dry Eye Syndromes↗
PubMed1992

[Evaluation of the analgesic effect of dolsin during labor].

The authors evaluate the analgetic action of 50 mg dolsin in parturient women during childbirth using a Slovak version of McGill's questionnaire on pain. The intensity of pain in women is evaluated before administration of dolsin and after its administration. The obtained data on the analgetic effect are compared with the total score of pain and individual components of pain by the paired t-test. Although the mean values of the total score of pain and the sensory components of pain declined after administration of dolsin, the change was not statistically significant. In the affective component of pain the mean value of PRI(A) increased after dolsin administration.

Analgesia, Obstetrical↗
PubMed1989

[Evaluation of fetal status in risk pregnancy using the biophysical profile].

Experiences with using the biophysical profile according to Manning et al. in diagnosing the danger to the fetus in at risk pregnancy are presented. Examinations were carried out in 143 pregnant women. In 33 of them the following parameters were evaluated with respect to the values of the biophysical profile: placental maturity, urinary estriol, term and mode of termination of pregnancy, body weight, body length, and Apgar score of newborns. The authors recommend to extend this diagnostic method so that in interpreting the results it yields not only the overall clinical state of the pregnant woman should be considered but also biological rhythms of physiologic functions of the fetus as well the administration of drugs to the woman in pregnancy.

Female↗