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Pouliot R, Saint-Laurent A, Chypre C, Audet R, Vitté-Mony I, -Gaudreault RC, Auger M. Spectroscopic characterization of nanoErythrosomes in the absence and presence of conjugated polyethyleneglycols: an FTIR and (31)P-NMR study. BIOCHIMICA ET BIOPHYSICA ACTA 2002; 1564:317-24. [PMID: 12175913 DOI: 10.1016/s0005-2736(02)00465-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
We have recently developed from red blood cells a new delivery system called nanoErythrosomes. These nanovesicles offer a high degree of versatility for the encapsulation of biological or nonbiological compounds and for the binding of targeting agents. In particular, polyethyleneglycols can be conjugated by a covalent link to the basic amino acid residues constitutive of the different proteins. The binding of polyethyleneglycols to the nanoErythrosome membrane could be interesting for the therapeutic use of this delivery system since it could overcome heterologous immunogenicity and reduce rapid clearance from circulation. In the present study, we have investigated the effect of temperature on the nanoErythrosome behavior in the absence and presence of conjugated polyethyleneglycols. More specifically, Fourier transform infrared (FTIR) spectroscopy has been used to evaluate the lipid order and dynamics, the hydration and the degree of protein aggregation of the nanoErythrosomes after covalent binding of polyethyleneglycols having molecular weights of 2000 and 5000 g mol(-1). The results indicate that the nanoErythrosome lipid chain order is not significantly affected by heating the nanoErythrosomes at temperatures up to 50 degrees C. They also indicate that the nanoErythrosome proteins aggregate irreversibly at temperatures above 37 degrees C, this effect being abolished in the presence of polyethyleneglycols. The presence of polyethyleneglycols decreases the accessibility of water to the lipid head groups. On the other hand, 31P-nuclear magnetic resonance (NMR) and electron microscopy results reveal that the presence of polyethyleneglycols prevents the aggregation of the nanoErythrosome structures.
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Affiliation(s)
- Roxane Pouliot
- Département de Chimie, Centre de Recherche en Sciences et Ingénierie des Macromolécules, Université Laval, Pavillon Vachon, Rm. 2214 C, Quebec, Quebec, Canada G1K 7P4
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213
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Kuhl TL, Majewski J, Howes PB, Kjaer K, von Nahmen A, Lee KYC, Ocko B, Israelachvili JN, Smith GS. Packing Stress Relaxation in Polymer−Lipid Monolayers at the Air−Water Interface: An X-ray Grazing-Incidence Diffraction and Reflectivity Study. J Am Chem Soc 1999. [DOI: 10.1021/ja991048j] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- T. L. Kuhl
- Contribution from the Materials Research Laboratory, University of California, Santa Barbara, California 93106, Manuel Lujan Jr. Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Solid State Physics, Risø National Laboratory, DK-4000 Roskilde, Denmark, Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, and Department of Chemistry, The University of Chicago, Chicago, Illinois 60637
| | - J. Majewski
- Contribution from the Materials Research Laboratory, University of California, Santa Barbara, California 93106, Manuel Lujan Jr. Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Solid State Physics, Risø National Laboratory, DK-4000 Roskilde, Denmark, Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, and Department of Chemistry, The University of Chicago, Chicago, Illinois 60637
| | - P. B. Howes
- Contribution from the Materials Research Laboratory, University of California, Santa Barbara, California 93106, Manuel Lujan Jr. Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Solid State Physics, Risø National Laboratory, DK-4000 Roskilde, Denmark, Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, and Department of Chemistry, The University of Chicago, Chicago, Illinois 60637
| | - K. Kjaer
- Contribution from the Materials Research Laboratory, University of California, Santa Barbara, California 93106, Manuel Lujan Jr. Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Solid State Physics, Risø National Laboratory, DK-4000 Roskilde, Denmark, Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, and Department of Chemistry, The University of Chicago, Chicago, Illinois 60637
| | - A. von Nahmen
- Contribution from the Materials Research Laboratory, University of California, Santa Barbara, California 93106, Manuel Lujan Jr. Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Solid State Physics, Risø National Laboratory, DK-4000 Roskilde, Denmark, Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, and Department of Chemistry, The University of Chicago, Chicago, Illinois 60637
| | - K. Y. C. Lee
- Contribution from the Materials Research Laboratory, University of California, Santa Barbara, California 93106, Manuel Lujan Jr. Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Solid State Physics, Risø National Laboratory, DK-4000 Roskilde, Denmark, Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, and Department of Chemistry, The University of Chicago, Chicago, Illinois 60637
| | - B. Ocko
- Contribution from the Materials Research Laboratory, University of California, Santa Barbara, California 93106, Manuel Lujan Jr. Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Solid State Physics, Risø National Laboratory, DK-4000 Roskilde, Denmark, Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, and Department of Chemistry, The University of Chicago, Chicago, Illinois 60637
| | - J. N. Israelachvili
- Contribution from the Materials Research Laboratory, University of California, Santa Barbara, California 93106, Manuel Lujan Jr. Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Solid State Physics, Risø National Laboratory, DK-4000 Roskilde, Denmark, Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, and Department of Chemistry, The University of Chicago, Chicago, Illinois 60637
| | - G. S. Smith
- Contribution from the Materials Research Laboratory, University of California, Santa Barbara, California 93106, Manuel Lujan Jr. Neutron Scattering Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, Department of Solid State Physics, Risø National Laboratory, DK-4000 Roskilde, Denmark, Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, and Department of Chemistry, The University of Chicago, Chicago, Illinois 60637
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214
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Hianik T, Babincová M, Babinec P, Prenner E, Paltauf F, Hermetter A. Aggregation of Small Unilamellar Vesicles of Polyunsaturated Phosphatidylcholines under the Influence of Polyethylene Glycol. ACTA ACUST UNITED AC 1999. [DOI: 10.1524/zpch.1999.211.part_2.133] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- T. Hianik
- Department of Biophysics and Chemical Physics, Faculty of Mathematics and Physics, Comenius University, Bratislava, Slovakia
| | - M. Babincová
- Department of Biophysics and Chemical Physics, Faculty of Mathematics and Physics, Comenius University, Bratislava, Slovakia
| | - P. Babinec
- Department of Biophysics and Chemical Physics, Faculty of Mathematics and Physics, Comenius University, Bratislava, Slovakia
| | - E. Prenner
- Institut of Biochemistry and Food Chemistry, Technical University of Graz, Graz, Austria
| | - F. Paltauf
- Institut of Biochemistry and Food Chemistry, Technical University of Graz, Graz, Austria
| | - A. Hermetter
- Institut of Biochemistry and Food Chemistry, Technical University of Graz, Graz, Austria
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216
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Dan P, Dagan A, Krimsky M, Pruzanski W, Vadas P, Yedgar S. Inhibition of type I and type II phospholipase A2 by phosphatidyl-ethanolamine linked to polymeric carriers. Biochemistry 1998; 37:6199-204. [PMID: 9558359 DOI: 10.1021/bi972066l] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We have previously shown that cell surface proteoglycans protect the cell membrane from the action of extracellular phospholipase A2 (PLA2) enzymes [Dan, P., Nitzan, D. W., Dagan, A., Ginsburg, I., and Yedgar, S. (1996) FEBS Lett. 383, 75-78]. Cell-impermeable PLA2 inhibitors (ExPLIs) were prepared by linking phosphatidylethanolamine (PE) to polymeric carriers, specifically, carboxymethylcellulose, heparin, or hyaluronic acid. The structure of these inhibitors enables the incorporation of their PE moiety into the membrane while the polymer remains at the membrane surface. In the present study, we show that the ExPLIs are effective inhibitors of the hydrolysis of different phospholipids in biological (Escherichia coli) and model (phospholipid vesicle) membranes, by diverse types of PLA2 enzymes, specifically human recombinant synovial fluid and C. atrox (type II), as well as Naja mocambique and porcine pancreatic (type I) PLA2. It is proposed that the external polymers of the ExPLIs, which are anchored to the membrane by the PE, mimic the naturally occurring cell surface proteoglycans and similarly protect membranes from the action of exogenous PLA2.
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Affiliation(s)
- P Dan
- Department of Biochemistry, Hebrew University-Hadassah Medical School, Jerusalem, Israel
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