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Plasma phospholipid mass transfer rate: relationship to plasma phospholipid and cholesteryl ester transfer activities and lipid parameters.
Biochim Biophys Acta. 1996 Sep 27; 1303(2):103-10.BB

Abstract

Human plasma phospholipid transfer protein (PLTP) has been shown to facilitate the transfer of phospholipid from liposomes or isolated very low and low density lipoproteins to high density lipoproteins. Its activity in plasma and its physiological function are presently unknown. To elucidate the role of PLTP in lipoprotein metabolism and to delineate factors that may affect the rate of phospholipid transfer between lipoproteins, we determined the plasma phospholipid mass transfer rate (PLTR) in 16 healthy adult volunteers and assessed its relationship to plasma lipid levels, and to phospholipid transfer activity (PLTA) and cholesteryl ester transfer activity (CETA) measured by radioassays. The plasma PLTR in these subjects was 27.2 +/- 11.8 nmol/ml per h at 37 degrees C (mean +/- S.D.), and their PLTA and CETA were 13.0 +/- 1.7 mumol/ml per h and 72.8 +/- 15.7 nmol/ml per h, respectively. Plasma PLTR was correlated directly with total, non-HDL, and HDL triglyceride (rs = 0.76, P < 0.001), total and non-HDL phospholipid (rs > 0.53, P < 0.05), and inversely with HDL free cholesterol (rs = -0.54, P < 0.05), but not with plasma PLTA and CETA. When 85% to 96% of the PLTA in plasma was removed by polyclonal antibodies against recombinant human PLTP, phospholipid mass transfer from VLDL and LDL to HDL was reduced by 50% to 72%, but 80% to 100% of CETA could still be detected. These studies demonstrate that PLTP plays a major role in facilitating the transfer of phospholipid between lipoproteins, and suggest that triglyceride is a significant modulator of intravascular phospholipid transport. Furthermore, most of the PLTP and CETP in human plasma is associated with different particles. Plasma PLTA and CETA were also measured in mouse, rat, hamster, guinea pig, rabbit, dog, pig, and monkey. Compared to human, PLTA in rat and mouse was significantly higher and in rabbit and guinea pig was significantly lower while the remaining animal species had PLTA similar to humans. No correlation between PLTA and CETA was observed among animal species.

Authors+Show Affiliations

Northwest Lipid Research Laboratories, Department of Medicine, School of Medicine, University of Washington, Seattle 98103, USA.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

8856039

Citation

Cheung, M C., et al. "Plasma Phospholipid Mass Transfer Rate: Relationship to Plasma Phospholipid and Cholesteryl Ester Transfer Activities and Lipid Parameters." Biochimica Et Biophysica Acta, vol. 1303, no. 2, 1996, pp. 103-10.
Cheung MC, Wolfbauer G, Albers JJ. Plasma phospholipid mass transfer rate: relationship to plasma phospholipid and cholesteryl ester transfer activities and lipid parameters. Biochim Biophys Acta. 1996;1303(2):103-10.
Cheung, M. C., Wolfbauer, G., & Albers, J. J. (1996). Plasma phospholipid mass transfer rate: relationship to plasma phospholipid and cholesteryl ester transfer activities and lipid parameters. Biochimica Et Biophysica Acta, 1303(2), 103-10.
Cheung MC, Wolfbauer G, Albers JJ. Plasma Phospholipid Mass Transfer Rate: Relationship to Plasma Phospholipid and Cholesteryl Ester Transfer Activities and Lipid Parameters. Biochim Biophys Acta. 1996 Sep 27;1303(2):103-10. PubMed PMID: 8856039.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Plasma phospholipid mass transfer rate: relationship to plasma phospholipid and cholesteryl ester transfer activities and lipid parameters. AU - Cheung,M C, AU - Wolfbauer,G, AU - Albers,J J, PY - 1996/9/27/pubmed PY - 1996/9/27/medline PY - 1996/9/27/entrez SP - 103 EP - 10 JF - Biochimica et biophysica acta JO - Biochim. Biophys. Acta VL - 1303 IS - 2 N2 - Human plasma phospholipid transfer protein (PLTP) has been shown to facilitate the transfer of phospholipid from liposomes or isolated very low and low density lipoproteins to high density lipoproteins. Its activity in plasma and its physiological function are presently unknown. To elucidate the role of PLTP in lipoprotein metabolism and to delineate factors that may affect the rate of phospholipid transfer between lipoproteins, we determined the plasma phospholipid mass transfer rate (PLTR) in 16 healthy adult volunteers and assessed its relationship to plasma lipid levels, and to phospholipid transfer activity (PLTA) and cholesteryl ester transfer activity (CETA) measured by radioassays. The plasma PLTR in these subjects was 27.2 +/- 11.8 nmol/ml per h at 37 degrees C (mean +/- S.D.), and their PLTA and CETA were 13.0 +/- 1.7 mumol/ml per h and 72.8 +/- 15.7 nmol/ml per h, respectively. Plasma PLTR was correlated directly with total, non-HDL, and HDL triglyceride (rs = 0.76, P < 0.001), total and non-HDL phospholipid (rs > 0.53, P < 0.05), and inversely with HDL free cholesterol (rs = -0.54, P < 0.05), but not with plasma PLTA and CETA. When 85% to 96% of the PLTA in plasma was removed by polyclonal antibodies against recombinant human PLTP, phospholipid mass transfer from VLDL and LDL to HDL was reduced by 50% to 72%, but 80% to 100% of CETA could still be detected. These studies demonstrate that PLTP plays a major role in facilitating the transfer of phospholipid between lipoproteins, and suggest that triglyceride is a significant modulator of intravascular phospholipid transport. Furthermore, most of the PLTP and CETP in human plasma is associated with different particles. Plasma PLTA and CETA were also measured in mouse, rat, hamster, guinea pig, rabbit, dog, pig, and monkey. Compared to human, PLTA in rat and mouse was significantly higher and in rabbit and guinea pig was significantly lower while the remaining animal species had PLTA similar to humans. No correlation between PLTA and CETA was observed among animal species. SN - 0006-3002 UR - https://www.unboundmedicine.com/medline/citation/8856039/Plasma_phospholipid_mass_transfer_rate:_relationship_to_plasma_phospholipid_and_cholesteryl_ester_transfer_activities_and_lipid_parameters_ L2 - https://linkinghub.elsevier.com/retrieve/pii/0005-2760(96)00082-3 DB - PRIME DP - Unbound Medicine ER -