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- W2898648336 abstract "Familial LCAT Deficiency (FLD) is associated with the gradual development of severe kidney dysfunction from the renal deposition of LpX, an abnormal lipoprotein that accumulates in this disorder. The aim of our study was to develop an efficient mouse model of FLD in which elevated plasma LpX and kidney dysfunction can be rapidly induced in order to test whether recombinant human LCAT (rhLCAT) injections can prevent renal disease. We used the previously described LCAT-Ko x SREBP1a transgenic mouse model (Zhu et al., 2004) with the transgene placed under control of PEPCK promoter, which can be induced by high protein diets. We demonstrate that high levels of LpX plasma particles appeared within 5-7 days after 2-3 month old mice were switched to a protein rich carbohydrate low diet (PRCL). Kidney dysfunction measured by albumin/creatinine ratio after 9 days on PRCL diet increased by 32±12 fold. On the PRCL diet, plasma VLDL-C and LDL-C fractions of LCAT-Ko x SREBP1a mice increased 2-4 fold compared to mice on a normal chow diet. Transmission electron microscopy clearly demonstrated the presence of multilamellar LpX particles in plasma and renal glomeruli, as well as robust accumulation lipid droplets in hepatocytes of mice kept on the PRCL diet for 7 days. All these changes were reversible; when mice were returned to the normal chow diet their plasma lipid characteristics and kidney function quickly returned within days to the level observed before the diet was initiated. When LCAT-Ko x SREBP1a mice were placed on PRCL diet and simultaneously treated with rhLCAT (x 3 per week IV injection 30 mg/kg for 2 weeks) plasma LpX was eliminated and a normal mouse lipoprotein profile was observed and most notably HDL-C increased from 5.6 g/dL to 54.1 mg/dL. Treatment with rhLCAT decreased the albumin/creatinine ratio 5±1 fold. Conclusions: LCAT-Ko and SREBP1a mice on a PRCL diet can be used as efficient model for investigating potential therapies for LCAT deficiency. Results show the feasibility of rhLCAT treatment for preventing renal disease in patients with FLD." @default.
- W2898648336 created "2018-11-09" @default.
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- W2898648336 date "2016-05-01" @default.
- W2898648336 modified "2023-09-24" @default.
- W2898648336 title "Abstract 234: Reduction of LpX and Improvement in Kidney Function in LCAT-KO Mice by Enzyme Replacement Therapy" @default.
- W2898648336 doi "https://doi.org/10.1161/atvb.36.suppl_1.234" @default.
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