Drug – bio-affecting and body treating compositions – Antigen – epitope – or other immunospecific immunoeffector – Amino acid sequence disclosed in whole or in part; or...
Reexamination Certificate
2005-08-10
2008-10-21
Navarro, Mark (Department: 1645)
Drug, bio-affecting and body treating compositions
Antigen, epitope, or other immunospecific immunoeffector
Amino acid sequence disclosed in whole or in part; or...
C530S395000
Reexamination Certificate
active
07438915
ABSTRACT:
This study reports a novel immunopotentiating effect of a lectin (FFrL) extracted from the mushroomFomitella fraxineaon poultry cell-mediated immunity and poultry coccidiosis. We describe the extraction of FFrL, its in vitro mitogenic activity and in vivo protection against an oral challenge infection withEimeria acervulina. When tested on several cell types, crude FFrL agglutinated mouse erythrocytes and thymocytes and also various other cells including murine and human cell lines. However, crude FFrL did not agglutinate human A, B, AB, or O erythrocytes. FFrL showed a potent mitogenic activity on chicken splenic lymphocytes where at lower concentrations, crude FFrL exerted stronger mitogenic activity than Con A, a well-known potent mitogen for T lymphocytes. Further, FFrL significantly induced (P<0.05) nitric oxide secretion in HD11 cells, an established macrophage cell line, and suppressed (P<0.05) RP9 tumor cell growth, both, in a dose-dependent fashion. When injected into eighteen-day-old chicken embryos followed by an oralE. acervulinachallenge infection, FFrL-treatment significantly protected chickens against weight loss associated with coccidiosis (P<0.05). Injecting embryos with FFrL also resulted in significant reduction in oocyst shedding as compared to the control saline-injected birds (P<0.05). The results of this study demonstrate that FFrL is an effective growth-promoting and immunostimulating agent in poultry during coccidiosis.
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Fado John D.
Navarro Mark
Portner Ginny
Rabin Evelyn M.
The United States of America as represented by the Secretary of
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