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Clinical Microbiology Reviews, January 1998, p. 121-141, Vol. 11, No. 1
0893-8512/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Serologic Response to Cell Wall Mannoproteins and Proteins of Candida albicans

José P. Martínez,1,* M. Luisa Gil,1 José L. López-Ribot,2 and W. LaJean Chaffin3

Departamento de Microbiología y Ecología, Facultad de Farmacia, Universitat de València, Valencia, Spain,1 and Division of Infectious Diseases, Department of Medicine, The University of Texas Health Sciences Center at San Antonio, San Antonio,2 and Department of Microbiology and Immunology, Texas Tech University Health Sciences Center, Lubbock,3 Texas

The cell wall of Candida albicans not only is the structure in which many biological functions essential for the fungal cells reside but also is a significant source of candidal antigens. The major cell wall components that elicit a response from the host immune system are proteins and glycoproteins, the latter being predominantly mannoproteins. Both the carbohydrate and protein moieties are able to trigger immune responses. Although cell-mediated immunity is often considered to be the most important line of defense against candidiasis, cell wall protein and glycoprotein components also elicit a potent humoral response from the host that may include some protective antibodies. Proteins and glycoproteins exposed at the most external layers of the wall structure are involved in several types of interactions of fungal cells with the exocellular environment. Thus, coating of fungal cells with host antibodies has the potential to influence profoundly the host-parasite interaction by affecting antibody-mediated functions such as opsonin-enhanced phagocytosis and blocking the binding activity of fungal adhesins for host ligands. In this review, the various members of the protein and glycoprotein fraction of the C. albicans cell wall that elicit an antibody response in vivo are examined. Although a number of proteins have been shown to stimulate an antibody response, for some of these species the response is not universal. On the other hand, some of the studies demonstrate that certain cell wall antigens and anti-cell wall antibodies may be the basis for developing specific and sensitive serologic tests for the diagnosis of candidasis, particularly the disseminated form. In addition, recent studies have focused on the potential for antibodies to cell wall protein determinants to protect the host against infection. Hence, a better understanding of the humoral response to cell wall antigens of C. albicans may provide the basis for the development of (i) effective procedures for the serodiagnosis of disseminated candidiasis and (ii) novel prophylactic (vaccination) and therapeutic strategies for the management of this type of infection.

* Corresponding author. Mailing address: Departamento de Microbiología y Ecología, Facultad de Farmacia, Room 3-70, Universitat de València, Avda. Vicente Andrés Estellés, s/n, 46100-Burjasot, Valencia, Spain. Phone and fax: 34-6-3864770. E-mail: jose.pedro.martinez{at}uv.es.

Clinical Microbiology Reviews, January 1998, p. 121-141, Vol. 11, No. 1
0893-8512/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


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