Abstract
A pattern photobleaching method has been used to measure the rates of lateral diffusion of fluorescent-labeled specific anti-nitroxide IgG bound with both combining sites to nitroxide-containing phospholipids in liposomal membranes composed of dimyristoyl phosphatidylcholine at 28 degrees C ("fluid"), dipalmitoyl phosphatidylcholine at 32 degrees C ("Solid"), and dipalmitoyl phosphatidylcholine containing 15 or 25 mol% cholesterol ("solid" or "fluid," respectively, at 32 degrees C). The diffusion coefficients of the bound immunoglobulin were found to be the same as those of fluorescent-labeled phospholipids in each case even though these diffusion coefficients range from 10(-11) to 10(-8) cm2/sec. Hapten-containing liposomal membranes of the type studied here have previously been shown to elicit a number of antibody-dependent immune responses. Therefore, this work indicates that membrane-bound but otherwise freely diffusing antibodies are sufficient for these reponses.
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Selected References
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- Brûlet P., McConnell H. M. Lateral hapten mobility and immunochemistry of model membranes. Proc Natl Acad Sci U S A. 1976 Sep;73(9):2977–2981. doi: 10.1073/pnas.73.9.2977. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Brûlet P., McConnell H. M. Structural and dynamical aspects of membrane immunochemistry using model membranes. Biochemistry. 1977 Mar 22;16(6):1209–1217. doi: 10.1021/bi00625a028. [DOI] [PubMed] [Google Scholar]
- Craig S. W., Cuatrecasas P. Mobility of cholera toxin receptors on rat lymphocyte membranes. Proc Natl Acad Sci U S A. 1975 Oct;72(10):3844–3848. doi: 10.1073/pnas.72.10.3844. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Engelhard V. H., Strominger J. L., Mescher M., Burakoff S. Induction of secondary cytotoxic T lymphocytes by purified HLA-A and HLA-B antigens reconstituted into phospholipid vesicles. Proc Natl Acad Sci U S A. 1978 Nov;75(11):5688–5691. doi: 10.1073/pnas.75.11.5688. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Esser A. F., Bartholomew R. M., Parce J. W., McConnell H. M. The physical state of membrane lipids modulates the activation of the first component of complement. J Biol Chem. 1979 Mar 25;254(6):1768–1770. [PubMed] [Google Scholar]
- Finberg R., Mescher M., Burakoff S. J. The induction of virus-specific cytotoxic T lymphocytes with solubilized viral and membrane proteins. J Exp Med. 1978 Dec 1;148(6):1620–1627. doi: 10.1084/jem.148.6.1620. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hafeman D. G., Parce J. W., McConnell H. M. Specific antibody-dependent activation of neutrophils by liposomes containing spin-label lipid haptens. Biochem Biophys Res Commun. 1979 Feb 14;86(3):522–528. doi: 10.1016/0006-291x(79)91745-5. [DOI] [PubMed] [Google Scholar]
- Henry N., Parce J. W., McConnell H. M. Visualization of specific antibody and C1q binding to hapten-sensitized lipid vesicles. Proc Natl Acad Sci U S A. 1978 Aug;75(8):3933–3937. doi: 10.1073/pnas.75.8.3933. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hollander N., Mehdi S. Q., Weissman I. L., McConnell H. M., Kriss J. P. Allogeneic cytolysis of reconstituted membrane vesicles. Proc Natl Acad Sci U S A. 1979 Aug;76(8):4042–4045. doi: 10.1073/pnas.76.8.4042. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Humphries G. M., McConnell H. M. Membrane-controlled depletion of complement activity by spin-label-specific IgM. Proc Natl Acad Sci U S A. 1977 Aug;74(8):3537–3541. doi: 10.1073/pnas.74.8.3537. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kinsky S. C. Immunogenicity of liposomal model membranes. Ann N Y Acad Sci. 1978;308:111–123. doi: 10.1111/j.1749-6632.1978.tb22017.x. [DOI] [PubMed] [Google Scholar]
- Kinsky S. C., Nicolotti R. A. Immunological properties of model membranes. Annu Rev Biochem. 1977;46:49–67. doi: 10.1146/annurev.bi.46.070177.000405. [DOI] [PubMed] [Google Scholar]
- Koppel D. E., Axelrod D., Schlessinger J., Elson E. L., Webb W. W. Dynamics of fluorescence marker concentration as a probe of mobility. Biophys J. 1976 Nov;16(11):1315–1329. doi: 10.1016/S0006-3495(76)85776-1. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Martin F. J., MacDonald R. C. Lipid vesicle-cell interactions. III. Introduction of a new antigenic determinant into erythrocyte membranes. J Cell Biol. 1976 Sep;70(3):515–526. doi: 10.1083/jcb.70.3.515. [DOI] [PMC free article] [PubMed] [Google Scholar]
- RINDERKNECHT H. Ultra-rapid fluorescent labelling of proteins. Nature. 1962 Jan 13;193:167–168. doi: 10.1038/193167b0. [DOI] [PubMed] [Google Scholar]
- Rubenstein J. L., Smith B. A., McConnell H. M. Lateral diffusion in binary mixtures of cholesterol and phosphatidylcholines. Proc Natl Acad Sci U S A. 1979 Jan;76(1):15–18. doi: 10.1073/pnas.76.1.15. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Schroit A. J., Pagano R. E. Introduction of antigenic phospholipids into the plasma membrane of mammalian cells: organization and antibody-induced lipid redistribution. Proc Natl Acad Sci U S A. 1978 Nov;75(11):5529–5533. doi: 10.1073/pnas.75.11.5529. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sedlacek H. H., Stärk J., Seiler F. R., Ziegler W., Wiegandt H. Cholera toxin induced redistribution of sialoglycolipid receptor at the lymphocyte membrane. FEBS Lett. 1976 Jan 15;61(2):272–276. doi: 10.1016/0014-5793(76)81055-1. [DOI] [PubMed] [Google Scholar]
- Sheats J. R., McConnell H. M. A photochemical technique for measuring lateral diffusion of spin-labeled phospholipids in membranes. Proc Natl Acad Sci U S A. 1978 Oct;75(10):4661–4663. doi: 10.1073/pnas.75.10.4661. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Smith B. A., McConnell H. M. Determination of molecular motion in membranes using periodic pattern photobleaching. Proc Natl Acad Sci U S A. 1978 Jun;75(6):2759–2763. doi: 10.1073/pnas.75.6.2759. [DOI] [PMC free article] [PubMed] [Google Scholar]