Linked Life Data

10427619

Source:http://linkedlifedata.com/resource/pubmed/id/10427619

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1999-9-8
pubmed:abstractText
Low density lipoprotein (LDL) apheresis is a safe procedure to treat severe hypercholesterolemia in patients with chronic heart disease (CHD). However, both hypercholesterolemia and extracorporeal treatment have been associated with oxidative stress. Even though LDL lowering has been proven to reduce CHD, the oxidative modification of LDL has been suggested to render these lipoproteins more atherogenic. It is therefore important to know whether LDL apheresis is safe with respect to oxidative stress including LDL oxidation. The contact of living cells such as leukocytes with artificial surfaces during extracorporeal treatment induces the liberation of various chemokines and cytokines as well as oxygen-derived radicals also known as respiratory burst. These effects justify the consideration of leukocyte activation resulting from extracorporeal treatment as an inflammatory reaction. In extracorporeal circuits such as those used for hemodialysis, the release of oxygen radicals has been shown and depends on the fiber material used in the dialyzer membranes. Reactive oxygen radicals can interact with different cell components such as carbohydrates, DNA, proteins, and lipids. Antioxidants in the form of low molecular weight molecules such as glutathione or radical scavenging enzymes such as superoxide dismutase offer protection against the damaging effects of prooxidants. The disturbed balance between prooxidants and antioxidants is considered as oxidative stress. Therefore, either an increase in oxygen radical formation or a decrease of antioxidants will lead to oxidative stress. During LDL apheresis, a decrease of low molecular weight antioxidants has been reported. In contrast, we have observed an increase in plasma glutathione concentrations but no severe reduction in the activity of antioxidant enzymes in plasma, red cells, or granulocytes, which may explain the lack of plasma lipid peroxidation shown during this kind of extracorporeal treatment. In addition, LDL isolated at the end of apheresis procedures are more resistant to oxidation. These findings suggest that LDL apheresis is safe with respect to radical mediated injury.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
1091-6660
pubmed:author
pubmed:issnType
Print
pubmed:volume
3
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
219-26
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1999
pubmed:articleTitle
Review: the oxidant/antioxidant balance during regular low density lipoprotein apheresis.
pubmed:affiliation
Department of Nephrology and Rheumatology, Georg-August-University, Göttingen, Germany. vschett@gwdg.de
pubmed:publicationType
Journal Article, Review