What does this research mean for the field?

Human lipoprotein lipase and hepatic triglyceride lipase are structurally and immunologically distinct proteins with different molecular weights, biochemical properties, and distinct epitopes. Novelty: ClaimNovelty.CONFIRMATORY. Consensus alignment: ConsensusAlignment.SUPPORTS_CONSENSUS.

What question did this study set out to answer?

To purify human lipoprotein lipase and hepatic triglyceride lipase to homogeneity from post-heparin plasma and characterize their biochemical relatedness and antibody reactivity.

September 1, 1985Journal of Biological ChemistryOpen Access

Purification and characterization of human lipoprotein lipase and hepatic triglyceride lipase. Reactivity with monoclonal antibodies to hepatic triglyceride lipase.

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Population

Human post-heparin plasma

Design

Preclinical

Authors

CCC F ChengCornell University ABAndré BensadounPreventive Cardiology TBThomas P. BersotGladstone Institutes

Discussion

Member takes

Implication

Confirms LPL and hepatic triglyceride lipase as distinct proteins in animal models; leaves differential human roles open.

Key Points

To purify human lipoprotein lipase and hepatic triglyceride lipase to homogeneity from post-heparin plasma and characterize their biochemical relatedness and antibody reactivity.
Purified enzymes from human post-heparin plasma, determining purity, yield, and molecular weight via SDS-PAGE under reducing conditions.
Generated four monoclonal antibodies against hepatic triglyceride lipase using hybridoma technology and assessed their binding and inhibition kinetics.
Compared both lipases across thermal inactivation, sulfhydryl sensitivity, amino acid composition, cyanogen bromide peptide fragments, and antibody cross-reactivity via Western blot and ELISA.
Lipoprotein lipase was purified 250,000-fold with a 27 +/- 15% yield (molecular weight 60,500 +/- 1,800), while hepatic triglyceride lipase was purified 100,000-fold with a 19 +/- 6% yield (molecular weight 65,200 +/- 400).
Monoclonal antibody HL3-5 selectively immunoprecipitated hepatic triglyceride lipase catalytic activity without inhibiting it, whereas the remaining three antibodies recognized only denatured enzyme.
All four monoclonal antibodies directed against hepatic triglyceride lipase showed zero cross-reactivity with lipoprotein lipase across Western blot, ELISA, and immunoprecipitation assays.

Structured PICO

Population

Human post-heparin plasma

Intervention

Purification and characterization of human lipoprotein lipase and hepatic triglyceride lipase, and generation of monoclonal antibodies

Outcome

Enzyme purity, molecular weight, and immunological cross-reactivitysurrogate

Biochemical and immunological characterization confirms that human lipoprotein lipase and hepatic triglyceride lipase are distinct proteins.

Cite This Study

Cheng et al. (1985) studied this question.

synapsesocial.com/papers/6a1bfda726cb5670aa9d3884 https://doi.org/10.1016/s0021-9258(19)85142-6

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Purification and characterization of human lipoprotein lipase and hepatic triglyceride lipase. Reactivity with monoclonal antibodies to hepatic triglyceride lipase.

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Purification and characterization of human lipoprotein lipase and hepatic triglyceride lipase. Reactivity with monoclonal antibodies to hepatic triglyceride lipase.

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

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