Two-compartment model of cholesterol kinetics for establishment of treatment strategy of LDL apheresis in nephrotic hypercholesterolemia.

Abstract:

:Cholesterol kinetics in the time course after LDL apheresis using a dextran sulfate cellulose column was analyzed by adapting a two-compartment cholesterol kinetic model. Fifteen sets of serial serum cholesterol concentrations after LDL apheresis from 4 patients with drug-resistant nephrotic hypercholesterolemia due to focal glomerulosclerosis (FGS) were analyzed and cholesterol kinetic parameters were estimated with the nonlinear least-squares method. The fractional cholesterol catabolic rates (Kc; 0.171 +/- 0.073/day, mean +/- SD) were markedly decreased as reported in familial hypercholesterolemia (homo: 0.101/day, hetero: 0.280/day). Cholesterol generation rates (G; 68.0 +/- 28.7 mg/dl/day, mean +/- SD) considerably overlapped the normal range (39.2-77.5 mg/dl/day). This result was compatible with an earlier report that Kc was reduced earlier than G in nephrotic hypercholesterolemia. The time average serum cholesterol concentrations (TAC) in the rebound phase after LDL apheresis can be simulated using these kinetic parameters by the Runge-Kutta-Gill method. According to our previous report, TAC must be reduced to under a near-normal level in order to obtain a beneficial effect on nephrotic syndrome due to FGS. In 10 sets out of the 15, once-weekly treatment of LDL apheresis was sufficient to achieve this aim, but in the remaining 5 cases, more frequent LDL apheresis up to twice a week was necessary in the early phase of treatment. In conclusion, the two-compartment cholesterol kinetic model is useful in clarifying the abnormal cholesterol kinetics in nephrotic syndrome and may be helpful in establishing a more rational strategy of LDL apheresis for nephrotic hypercholesterolemia.

journal_name

Blood Purif

journal_title

Blood purification

authors

Yashiro M,Muso E,Matsushima M,Nagura R,Sawanishi K,Sasayama S

doi

10.1159/000170180

subject

Has Abstract

pub_date

1994-01-01 00:00:00

pages

317-26

issue

6

eissn

0253-5068

issn

1421-9735

journal_volume

12

pub_type

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