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Infection and Immunity, February 2002, p. 985-987, Vol. 70, No. 2
0019-9567/01/$04.00+0 DOI: 70.2.985-987.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.
Deletion of the Two-Component Histidine Kinase Gene (CHK1) of Candida albicans Contributes to Enhanced Growth Inhibition and Killing by Human Neutrophils In Vitro
Antonella Torosantucci,1 Paola Chiani,1 Flavia De Bernardis,1 Antonio Cassone,1 Jose Antonio Calera,2 and Richard Calderone3*
Istituto Superiore di Sanita, Laboratory of Bacteriology and Mycology, Viale Regina Elena 299, Rome 00196, Italy,1
Department of MicrobiologyImmunology, Georgetown University Medical Center, Washington, D.C. ,3
Departamento de Microbiologia y Genetica, Universidad de Salamanca, Salamanca, Spain2
Received 18 July 2001/
Returned for modification 30 August 2001/
Accepted 8 November 2001
We have observed that human neutrophils (polymorphonuclear leukocytes [PMNs]) have an increased growth-inhibitory and killing effect on a strain of Candida albicans with a deletion of CHK1, a gene encoding a putative histidine kinase. The PMN effect was not due to increased phagocytosis of the null strain. This observation may partially explain the reduced virulence in a hematogenously disseminated murine model of candidiasis.
* Corresponding author. Mailing address: Department of Microbiology and Immunology, Georgetown University Medical Center, 312 SE Med-Dent Building, 3900 Reservoir Rd., NW, Washington, DC 20007-2197. Phone: (202) 687-1137. Fax: (202) 687-1800. E-mail:
calderor{at}georgetown.edu.
Editor: T. R. Kozel
Infection and Immunity, February 2002, p. 985-987, Vol. 70, No. 2
0019-9567/01/$04.00+0 DOI: 70.2.985-987.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.
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