Antisporozoite antibodies with protective and nonprotective activities: in vitro and in vivo correlations using Plasmodium gallinaceum, an avian model.
J Eukaryot Microbiol
; 42(6): 705-8, 1995.
Article
de En
| MEDLINE
| ID: mdl-8520586
ABSTRACT
A correlation was observed between in vivo and in vitro activity of six monoclonal antibodies (mAb) against the major circumsporozoite protein of the avian malaria Plasmodium gallinaceum as follows. (1) Two mAb were protective, totally abrogating sporozoite infectivity to chicks, its natural host, in vivo; they caused 100% inhibition of sporozoite invasion (ISI) in vitro to SL-29 chicken fibroblasts and intense ISI to cultured chicken macrophages, as well as inhibited the exoerythrocytic development of sporozoites taken up by macrophages, the initial cell host of P. gallinaceum sporozoites. (2) Two mAb were partially protective in that they reduced sporozoite infectivity to chicks, caused partial ISI to SL-29 and macrophage cells and partial inhibition to the exoerythrocytic development of sporozoites in macrophages in vitro. (3) Two mAb were totally inactive in vivo although they both bound to the sporozoite antigens as detected by indirect immunofluorescence, western blot, and ELISA; they both failed to induce ISI or inhibit the exoerythrocytic development in macrophages. The possible participation of macrophages as the initial cell type involved in sporozoite destruction in the presence of anti-circumsporozoite antibodies is discussed.
Recherche sur Google
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Plasmodium gallinaceum
/
Anticorps antiprotozoaires
/
Protéines de protozoaire
/
Poulets
/
Macrophages
/
Paludisme aviaire
/
Anticorps monoclonaux
Limites:
Animals
Langue:
En
Journal:
J Eukaryot Microbiol
Sujet du journal:
MICROBIOLOGIA
/
PARASITOLOGIA
Année:
1995
Type de document:
Article
Pays d'affiliation:
Venezuela