High concentrations of low density lipoprotein decrease basement membrane-associated heparan sulfate proteoglycan in cultured endothelial cells.
The effect of increasing low density lipoprotein (LDL) concentrations on the synthesis of basement membrane components was investigated in proliferating porcine aortic endothelial cells (PAEC) in culture. Basement membrane-associated heparan sulfate proteoglycan (HSPG) and fibronectin were determined by enzyme immunoassay. Low extracellular LDL-levels increase, high extracellular LDL-levels decrease the HSPG content of PAEC. Fibronectin synthesis was only slightly affected while proliferation and metabolic activity as assessed by lactate production were constant. Insulin or high extracellular glucose did not influence the effect of LDL on basement membrane components.
Olgemöller
B
B
Institut für Klinische Chemie und Diabetesforschung, Städtisches Krankenhaus Schwabing, München, FRG.
Schleicher
E D
ED
Schwaabe
S
S
Guretzki
H J
HJ
Gerbitz
K D
KD
D000818:Animals; D001485:Basement Membrane / Q000187:drug effects / Q000378:metabolism; D002478:Cells, Cultured; D008078:Cholesterol, LDL / Q000494:pharmacology; D011508:Chondroitin Sulfate Proteoglycans / Q000378:metabolism*; D003470:Culture Media; D004730:Endothelium, Vascular / Q000187:drug effects / Q000378:metabolism*; D005353:Fibronectins / Q000378:metabolism; D005947:Glucose / Q000494:pharmacology; D006025:Glycosaminoglycans / Q000378:metabolism*; D019812:Heparan Sulfate Proteoglycans; D006497:Heparan Sulfate / Q000378:metabolism*; D006801:Humans; D007328:Insulin / Q000494:pharmacology; D007700:Kinetics; D008077:Lipoproteins, LDL / Q000097:blood / Q000494:pharmacology*; D011509:Proteoglycans / Q000378:metabolism*; D013552:Swine
D008078:Cholesterol, LDL; D011508:Chondroitin Sulfate Proteoglycans; D003470:Culture Media; D005353:Fibronectins; D005947:Glucose; D006025:Glycosaminoglycans; D019812:Heparan Sulfate Proteoglycans; D006497:Heparan Sulfate; D007328:Insulin; D008077:Lipoproteins, LDL; D011509:Proteoglycans