RT Journal Article
T1 The CD5 ectodomain interacts with conserved fungal cell wall components and protects from zymosan-induced septic shock-like syndrome
A1 Vera, Jorge
A1 Fenutría, Rafael
A1 Cañadas Benito, Olga
A1 Figueras, Maite
A1 Mota, Rubén
A1 Sarrias, Maria Rosa
A1 Williams, David L.
A1 Casals Carro, María Cristina
A1 Yelamos, José
A1 Lozano, Francisco
AB The CD5 lymphocyte surface receptor is a group B member of the ancient and highly conserved scavenger receptor cysteine-rich superfamily. CD5 is expressed on mature T and B1a cells, where it is known to modulate lymphocyte activation and/or differentiation processes. Recently, the interaction of a few group B SRCR members (CD6, Spalpha, and DMBT1) with conserved microbial structures has been reported. Protein binding assays presented herein indicate that the CD5 ectodomain binds to and aggregates fungal cells (Schizosaccharomyces pombe, Candida albicans, and Cryptococcus neoformans) but not to Gram-negative (Escherichia coli) or Gram-positive (Staphylococcus aureus) bacteria. Accordingly, the CD5 ectodomain binds to zymosan but not to purified bacterial cell wall constituents (LPS, lipotheicoic acid, or peptidoglycan), and such binding is specifically competed by beta-glucan but not by mannan. The K(d) of the rshCD5/(1-->3)-beta-d-glucan phosphate interaction is 3.7 +/- 0.2 nM as calculated from tryptophan fluorescence data analysis of free and bound rshCD5. Moreover, zymosan binds to membrane-bound CD5, and this induces both MAPK activation and cytokine release. In vivo validation of the fungal binding properties of the CD5 ectodomain is deduced from its protective effect in a mouse model of zymosan-induced septic shock-like syndrome. In conclusion, the present results indicate that the CD5 lymphocyte receptor may sense the presence of conserved fungal components [namely, (1-->3)-beta-d-glucans] and support the therapeutic potential of soluble CD5 forms in fungal sepsis.
PB National Academy of Science
SN 0027-8424
YR 2009
FD 2009-02-03
LK https://hdl.handle.net/20.500.14352/93225
UL https://hdl.handle.net/20.500.14352/93225
LA eng
NO Vera J, Fenutría R, Cañadas O, Figueras M, Mota R, Sarrias MR, Williams DL, Casals C, Yelamos J, Lozano F. The CD5 ectodomain interacts with conserved fungal cell wall components and protects from zymosan-induced septic shock-like syndrome. Proc. Natl. Acad. Sci. USA. 2009 Feb 3; 106(5): 1506-1511
NO Ministerio de Educación
NO Red Española de Investigación en Patología Infecciosa
NO Fondo de Investigación Sanitaria
NO National Institutes of Health (NIH)
DS Docta Complutense
RD 12 ago 2024