Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Volumes and Na+/H+ antiporter activity of lymphocytes in patients with congestive heart failure (1994)
    Springer
    Journal of molecular medicine 72 (1994), S. 985-991 
    Details
    ISSN: 1432-1440
    Keywords: Cell volume ; Na+/H+ antiporter activity ; Human mononuclear leukocytes ; Angiotensin-converting enzyme inhibitor ; Diuretic therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Previous studies in patients with congestive heart failure (CHF) treated with diuretics and/or digoxin have shown abnormalities of cellular volume and electrolytes in biopsies of skeletal muscle. These abnormalities seem to play an important role with regard to the dysregulation of peripheral vascular resistance and characteristic clinical features of CHF, for example, muscular weakness. This study assessed the effect of angiotension-converting enzyme (ACE) inhibitor therapy on cell volume and cell volume regulation in patients with CHF. Cell diameters of human mononuclear leukocytes (HML) were determined electronically by a Coulter Counter. Cell diameters for 19 patients with decreased left ventricular ejection fraction (determined via levocardiography) on therapy with ACE inhibitors (group 1) were compared to those of HML from patients on diuretics alone (group 2,n = 16). The activity of the Na+/H+ antiporter was determined by cell swelling in isotonic propionate. The control group consisted of 20 normal, age- and sex-matched volunteers. HML diameters were significantly increased from 7.16 ± 0.07 in normals to 7.24 ± 0.08 μm (group 1;P 〈 0.01) and 7.23 ± 0.11 μm (group 2;P 〈 0.05), indicating an abnormal regulation of cell volume. There were no statistically significant correlations between the individual ejection fraction or digoxin therapy and average cell diameters. In both patient groups ethylisopropylamiloride-sensitive swelling rates were normal compared to the control group indicating a normal activity of the Na+/H+ antiporter. In conclusion, increased cell sizes reflect a structural change in HML rather than a rapidly reversible functional abnormality which was not affected different by ACE inhibition and diuretic therapy. The pathomechanisms underlying abnormal cell sizes in CHF patients remain to be determined but could be similar to those responsible for muscular changes in CHF. Further studies should show whether HML, being easily accessible, are a valid cell model to reflect these muscular abnormalities in CHF, and whether a normal cell size can be achieved therapeutically by normalized neurohumoral activities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00577741
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Aneurysms of coronary arteries in a patient with adult polycystic kidney disease: arteriosclerosis or involvement by the primary disease? (1993)
    Springer
    Journal of molecular medicine 71 (1993), S. 150-152 
    Details
    ISSN: 1432-1440
    Keywords: Adult polycystic kidney disease ; Coronary vascular abnormalities ; Coronary artery aneurysms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Adult polycystic kidney disease is frequently associated with gastrointestinal and cardiovascular abnormalities. These include hypertension, mitral valve prolapse, mild dilation of the aortic root, abdominal aneurysms, and predisposition to aortic, mitral, and tricuspidal valve regurgitation reminiscent of Marfan's syndrome. Although tho exact molecular mechanisms of adult polycystic kidney disease are not well established, a generalized defect of collagen structure is hypothesized. The most severe vascular problems, however, are typical intracranial aneurysms with a high incidence of subarachnoid hemorrhage and a high mortality rate. We report a case of dilated coronary arteries found incidentally in a patient with adult polycystic kidney disease and stress-induced angina pectoris. The typical angina pectoris of the patient is explained by left ventricular hypertrophy and coronary heart disease. Multiple liver cysts, mitral valve prolapse, and the coronary aneurysms in this patient with adult polycystic kidney disease appear to reflect the manifestation of a generalized connective tissue disorder in this syndrome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00179997
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Effects of aldosterone on intralymphocytic sodium and potassium in patients with essential hypertension (1990)
    Springer
    Journal of molecular medicine 68 (1990), S. 71-76 
    Details
    ISSN: 1432-1440
    Keywords: Essential hypertension ; Lymphocytes ; Sodium ; Potassium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In vitro binding of aldosterone to mineralocorticoid receptors on human mononuclear leukocytes (HML) and its effects on the intracellular sodium and potassium concentrations of HML have already been described. In the present paper this easily accessible human cell model was investigated in 13 patients with essential hypertension. In only four patients sodium in HML without incubation was elevated compared with the range for normal persons. A decrease of intracellular sodium or potassium occurred during incubation without aldosterone (P〈0.02). The addition of 1.4 nM aldosterone did not prevent this loss of electrolytes as observed in normal persons. Plasma renin activity and aldosterone were not correlated with the electrolyte response and were within the normal limits. The number of mineralocorticoid receptors/cell were within or close to the normal range (n=9). The independence of intracellular electrolytes from aldosterone despite a normal number of mineralocorticoid receptors may reflect an impairment of the mineralocorticoid effector mechanism in the HML of patients with essential hypertension.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01646846
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...