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Characterization of a fluorometric method for lipoprotein lipase
M Del Prado1, H Hernández-Montes, S Villalpando
1Unidad de Investigación en Nutrición, Hospital de Pediatría, Centro Médico Nacional Siglo XXI, IMSS, México, D.F.
Archives of Medical Research
|January 1, 1994
Summary
A new fluorometric assay accurately measures lipoprotein lipase (LPL) activity using dibutyrilfluorescine. This sensitive, cost-effective method offers an alternative to radioactive assays for studying LPL in various tissues.
Area of Science:
- Biochemistry
- Enzymology
- Analytical Chemistry
Background:
- Lipoprotein lipase (LPL) is crucial for lipid metabolism.
- Accurate measurement of LPL activity is essential for metabolic research.
- Existing radioactive assays can be costly and time-consuming.
Purpose of the Study:
- To develop and validate a novel fluorometric assay for quantifying LPL activity.
- To compare the performance of the fluorometric assay with a traditional radioactive method.
- To assess the assay's utility in detecting changes in LPL activity related to nutritional status.
Main Methods:
- Utilized dibutyrilfluorescine (DBF) as a fluorometric substrate for LPL.
- Measured liberated fluoresceine to determine enzyme activity.
- Compared results with a radioactive assay using tri[9,10(3)H]oleylglycerol.
- Tested enzyme extracts from adipose tissue and heart.
Main Results:
- The fluorometric assay demonstrated characteristics consistent with LPL activity, including NaCl inhibition and alkaline pH optimum.
- Close agreement was observed between the fluorometric and radioactive methods for LPL activity measurement.
- Similar inhibition patterns by NaCl were noted for both assay types.
- The fluorometric method showed comparable specificity and sensitivity to the radioactive method in detecting LPL activity changes.
Conclusions:
- The developed fluorometric assay provides a sensitive, specific, and cost-effective alternative for measuring LPL activity.
- This method is less expensive and faster than traditional radioactive assays.
- The assay is suitable for analyzing LPL activity in various tissues and under different physiological conditions.