Drug delivery by phospholipase A2 degradable liposomes

Jesper Davidsen; Charlotte Vermehren; Sven Frokjaer; Ole G. Mouritsen; Kent Jørgensen

doi:10.1016/S0378-5173(00)00634-7

Drug delivery by phospholipase A₂ degradable liposomes

Jesper Davidsen, Charlotte Vermehren, Sven Frokjaer, Ole G. Mouritsen, Kent Jørgensen^*

^*Corresponding author af dette arbejde

39 Citationer (Scopus)

Abstract

The effect of poly(ethylene glycol)-phospholipid (PE-PEG) lipopolymers on phospholipase A₂ (PLA₂) hydrolysis of liposomes composed of stearoyl-oleoylphosphatidylcholine (SOPC) was investigated. The PLA₂ lag-time, which is inversely related to the enzymatic activity, was determined by fluorescence, and the zeta-potentials of the liposomes were measured as a function of PE-PEG lipopolymer concentration. A significant decrease in the lag-time, and hence an increase in enzymatic activity, was observed with increasing amounts of the negatively charged PE-PEG lipopolymers incorporated into the SOPC liposomes. The enhancement of the PLA₂ enzymatic activity might involve a stronger PLA₂ binding affinity towards the negatively charged and polymer covered PEG liposomes.

Originalsprog	Engelsk
Tidsskrift	International Journal of Pharmaceutics
Vol/bind	214
Udgave nummer	1-2
Sider (fra-til)	67-69
Antal sider	3
ISSN	0378-5173
DOI	https://doi.org/10.1016/S0378-5173(00)00634-7
Status	Udgivet - 19 feb. 2001

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Citationsformater

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title = "Drug delivery by phospholipase A2 degradable liposomes",

abstract = "The effect of poly(ethylene glycol)-phospholipid (PE-PEG) lipopolymers on phospholipase A2 (PLA2) hydrolysis of liposomes composed of stearoyl-oleoylphosphatidylcholine (SOPC) was investigated. The PLA2 lag-time, which is inversely related to the enzymatic activity, was determined by fluorescence, and the zeta-potentials of the liposomes were measured as a function of PE-PEG lipopolymer concentration. A significant decrease in the lag-time, and hence an increase in enzymatic activity, was observed with increasing amounts of the negatively charged PE-PEG lipopolymers incorporated into the SOPC liposomes. The enhancement of the PLA2 enzymatic activity might involve a stronger PLA2 binding affinity towards the negatively charged and polymer covered PEG liposomes.",

keywords = "Degradation, Drug-delivery, Lipopolymer, Liposomes, PEG liposomes, Phospholipase A",

author = "Jesper Davidsen and Charlotte Vermehren and Sven Frokjaer and Mouritsen, {Ole G.} and Kent J{\o}rgensen",

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TY - JOUR

T1 - Drug delivery by phospholipase A2 degradable liposomes

AU - Davidsen, Jesper

AU - Vermehren, Charlotte

AU - Frokjaer, Sven

AU - Mouritsen, Ole G.

AU - Jørgensen, Kent

PY - 2001/2/19

Y1 - 2001/2/19

N2 - The effect of poly(ethylene glycol)-phospholipid (PE-PEG) lipopolymers on phospholipase A2 (PLA2) hydrolysis of liposomes composed of stearoyl-oleoylphosphatidylcholine (SOPC) was investigated. The PLA2 lag-time, which is inversely related to the enzymatic activity, was determined by fluorescence, and the zeta-potentials of the liposomes were measured as a function of PE-PEG lipopolymer concentration. A significant decrease in the lag-time, and hence an increase in enzymatic activity, was observed with increasing amounts of the negatively charged PE-PEG lipopolymers incorporated into the SOPC liposomes. The enhancement of the PLA2 enzymatic activity might involve a stronger PLA2 binding affinity towards the negatively charged and polymer covered PEG liposomes.

AB - The effect of poly(ethylene glycol)-phospholipid (PE-PEG) lipopolymers on phospholipase A2 (PLA2) hydrolysis of liposomes composed of stearoyl-oleoylphosphatidylcholine (SOPC) was investigated. The PLA2 lag-time, which is inversely related to the enzymatic activity, was determined by fluorescence, and the zeta-potentials of the liposomes were measured as a function of PE-PEG lipopolymer concentration. A significant decrease in the lag-time, and hence an increase in enzymatic activity, was observed with increasing amounts of the negatively charged PE-PEG lipopolymers incorporated into the SOPC liposomes. The enhancement of the PLA2 enzymatic activity might involve a stronger PLA2 binding affinity towards the negatively charged and polymer covered PEG liposomes.

KW - Degradation

KW - Drug-delivery

KW - Lipopolymer

KW - Liposomes

KW - PEG liposomes

KW - Phospholipase A

UR - http://www.scopus.com/inward/record.url?scp=0035910868&partnerID=8YFLogxK

U2 - 10.1016/S0378-5173(00)00634-7

DO - 10.1016/S0378-5173(00)00634-7

M3 - Journal article

C2 - 11282239

AN - SCOPUS:0035910868

SN - 0378-5173

VL - 214

SP - 67

EP - 69

JO - International Journal of Pharmaceutics

JF - International Journal of Pharmaceutics

IS - 1-2