Abstract
ABSTRACT Apical membrane antigen 1 (AMA-1) of Plasmodium merozoites is established as a candidate molecule for inclusion in a human malaria vaccine and is strongly conserved in the genus. We have investigated its function in merozoite invasion by incubating Plasmodium knowlesi merozoites with red cells in the presence of a previously described rat monoclonal antibody (MAb R31C2) raised against an invasion-inhibitory epitope of P. knowlesi AMA-1 and then fixing the material for ultrastructural analysis. We have found that the random, initial, long-range (12 nm) contact between merozoites and red cells occurs normally in the presence of the antibody, showing that AMA-1 plays no part in this stage of attachment. Instead, inhibited merozoites fail to reorientate, so they do not bring their apices to bear on the red cell surface and do not make close junctional apical contact. We conclude that AMA-1 may be directly responsible for reorientation or that the molecule may initiate the junctional contact, which is then presumably dependent on Duffy binding proteins for its completion.
References
39
Referenced
180
10.1016/0092-8674(90)90295-P
10.1073/pnas.89.15.7085
10.1083/jcb.77.1.72
10.1016/S1471-4922(03)00086-2
10.1017/S0031182000047247
- Bannister, L. H., G. A. Butcher, E. D. Dennis, and G. H. Mitchell. 1975. Studies on the structure and invasive behaviour of merozoites of Plasmodium knowlesi. Trans. R. Soc. Trop. Med. Hyg.69:5. / Trans. R. Soc. Trop. Med. Hyg. (1975)
10.1242/jcs.00665
10.1111/j.1550-7408.1989.tb05527.x
- Bannister, L. H., G. H. Mitchell, G. A. Butcher, E. D. Dennis, and S. Cohen. 1986. Structure and development of the surface coat of erythrocytic merozoites of Plasmodium knowlesi.Cell Tissue Res.245:281-290. / Cell Tissue Res. (1986)
10.1046/j.1462-5822.1999.00023.x
10.4269/ajtmh.1994.51.711
- Deans, J. A., T. Alderson, A. W. Thomas, G. H. Mitchell, E. S. Lennox, and S. Cohen. 1982. Rat monoclonal antibodies which inhibit the in vitro multiplication of Plasmodium knowlesi. Clin. Exp. Immunol.49:297-309. / Clin. Exp. Immunol. (1982)
10.1111/j.1365-3024.1988.tb00241.x
10.1016/0166-6851(84)90065-3
10.1128/IAI.70.6.3101-3110.2002
10.1126/science.803712
10.1016/S0166-6851(01)00326-7
10.1016/S0166-6851(02)00123-8
10.1016/0014-4894(83)90027-9
10.1128/IAI.70.10.5751-5758.2002
10.1074/jbc.M103076200
10.1074/jbc.M207985200
10.1084/jem.149.1.172
10.1038/415673a
- Mitchell, G. H., and L. H. Bannister. 1988. Malaria parasite invasion: interactions with the red cell membrane. Crit. Rev. Oncol. Hematol.8:225-310. / Crit. Rev. Oncol. Hematol. (1988)
10.1128/IAI.68.5.2899-2906.2000
10.1016/0166-6851(94)90096-5
10.1128/mcb.9.7.3151-3154.1989
10.1016/S0169-4758(00)01664-1
10.1242/jcs.111.13.1831
10.1073/pnas.96.24.14067
10.1038/415694a
10.1111/j.1365-3024.1990.tb00940.x
10.1016/0166-6851(84)90112-9
10.1590/S0074-02761994000600016
10.1046/j.1365-2958.2000.02175.x
10.4269/ajtmh.2001.65.100
10.1016/S0264-410X(00)00185-7
10.1016/S0021-9258(18)38259-0
Dates
Type | When |
---|---|
Created | 21 years, 8 months ago (Dec. 19, 2003, 9:48 p.m.) |
Deposited | 3 years, 5 months ago (March 4, 2022, 11:52 p.m.) |
Indexed | 3 months, 1 week ago (May 26, 2025, 4:05 a.m.) |
Issued | 21 years, 8 months ago (Jan. 1, 2004) |
Published | 21 years, 8 months ago (Jan. 1, 2004) |
Published Print | 21 years, 8 months ago (Jan. 1, 2004) |
@article{Mitchell_2004, title={Apical Membrane Antigen 1, a Major Malaria Vaccine Candidate, Mediates the Close Attachment of Invasive Merozoites to Host Red Blood Cells}, volume={72}, ISSN={1098-5522}, url={http://dx.doi.org/10.1128/iai.72.1.154-158.2004}, DOI={10.1128/iai.72.1.154-158.2004}, number={1}, journal={Infection and Immunity}, publisher={American Society for Microbiology}, author={Mitchell, G. H. and Thomas, A. W. and Margos, G. and Dluzewski, A. R. and Bannister, L. H.}, year={2004}, month=jan, pages={154–158} }