Biomedical subjects

E Martinka

Publications and source records attributed to E Martinka.

24 records · Page 2Linked to original sources

PubMed1995

[Endogenous digitalis-like substance. I. Basic characteristics].

Endogenous digitalis-like substances (EDLS) present endogenous products which structurally belong to cardiac glycosides (CG). According contemporary views these substances potentially present a newly discovered hormonal group produced by adrenal cortex. EDLS, similarly exogenous CG, bind to specific CG- receptor of Na(+)-K(+)-ATPase and inhibit activity of this enzyme. At the cellular level, EDLS lead to increase in intracellular calcium storing and such may play an important role in modulation of calcium-dependent processes and their response to characteristic stimuli (e.g. contractility of vascular smooth muscle cells, hormonal secretion etc.). First part is a review of present views to character and cellular effects of EDLS.

Animals↗

PubMed1995

[Endogenous digitalis-like substance. II. Relation to pathologic states and diseases].

Endogenous digitalis-like substances (EDLS) may play an active but differential role in numerous physiological and pathophysiological mechanisms. Reviewed are diseases, in which EDLS could be considered to play a causative role in their pathogenesis. Relations of EDLS were described mainly to cardiovascular, endocrine and metabolic diseases. Existence of EDLS, however, may have also another clinical implications which include possibility of influencing of digoxin monitoring as well as effects of digoxin therapy. Finally, methods of detection of EDLS are reviewed.

Blood Proteins↗

PubMed1994

[Renal excretion of calcium in healthy persons].

The authors examined the calcium excretion in a group of 100 healthy subjects (50 men and 50 women) aged 21-40 years. Urine was collected under ambulatory conditions. Calcium excretion was expressed as Ca excretion per minute, Nordin's index, calciuria/GF.1.73 m2 and the renal threshold for calcium. Calcium excretion per minute was significantly lower in women, as compared with men. This significant difference of mean values of calcium excretion per minute persists when the subjects are classified by sex and age groups. Women aged 31-40 years had a significantly lower calciuria/GF.1.73 m2 than men aged 21-30 years and a significantly higher renal threshold for calcium, as compared with men of equal age. If standard conditions of urine collection are respected, the mentioned examination method can be used during ambulatory examinations of patients with impaired calcium and phosphate metabolism. The assessed values of different indicators must be, however, compared with values of healthy subjects of the same age and sex.

Adult↗

PubMed1993

[Dynamics of digoxin-like immunoactivity during the oral glucose tolerance test in pregnant women].

The changes of serum digoxin-like immunoactivity (DLIA) during 75g oral glucose tolerance test (OGTT), were investigated in 25 pregnant women with various glucose tolerance. 13 women had a normal glucose tolerance (NGT), 12 women had an impaired glucose tolerance (IGT) or gestational diabetes mellitus (GDM). Test was performed after 25 week of pregnancy. The results were compared with 9 nonpregnant healthy volunteers (NHV). After an oral glucose challenge, there was observed a significant decrease in serum DLIA (p < 0.01 in 1st hour), in both groups of the pregnant women. In the group of NHV these findings were not found. Our findings suggest a possible relationships between DLIA and glucose tolerance in pregnant women. However, it needs further investigation. (Tab. 1, Fig. 1, Ref. 24.)

Adult↗

PubMed1993

[Lyme disease in internal medicine].

The authors present a review on the aetiology, clinical aspects, diagnosis and treatment of Lyme disease. They describe three patients who were treated in their department for Lyme disease. Although this disease has been followed up in Bohemia and Slovakia only for nine years, it is probable that it is more frequent than diagnosed. Lyme disease is a disease which affects different organs. Therefore it is important that specialists in internal medicine should more frequently consider the possible presence of this disease when making differential diagnoses.

Adult↗

PubMed1992

[Endogenous digitalis-like substance in relation to glycemia and insulinemia].

The digitalis-like substance (DLS), insulin resistance, and hyperglycemia are ascribed important roles in the pathogenesis of essential hypertension. The relationship between DLS and glycemia (insulinemia) was investigated in the present study. The levels of glycemia, insulinemia and DLS were measured during oral glucose load in a group of 18 subjects with various blood pressure values. Fasting levels of glycemia and insulinemia were in each subject within the physiological range and no correlation was found to exist between the fasting levels of DLS and glycemia (insulinemia). One hour after oral glucose load the increase of glycemia and insulinemia was significantly higher in the group of subjects with SBP > 140 and/or DBP > 90 mmHg than in normotensive subjects (p < 0.001). The increase in glycemia (insulinemia) was followed by a decrease of DLS. This contrary trend could be expressed as a significant inverse correlation between the change in plasma DLS and the change in glycemia (r = -0.660 p = 0.0039), and also between the change in plasma DLS and the change insulinemia (r = -0.687 p = 0.0023). These findings are assumed to suggest certain mechanisms involved in the pathophysiology of essential hypertension. (Tab. 3, Fig. 2, Ref. 20.)

Adult↗