Journal
GLYCOBIOLOGY
Volume 21, Issue 9, Pages 1173-1180Publisher
OXFORD UNIV PRESS INC
DOI: 10.1093/glycob/cwr051
Keywords
C. albicans; mannan; mannoprotein; molecular weight; temperature
Categories
Funding
- National Institutes of Health [GM53552, F32CA132546-03]
- ETSU faculty
- Deutsche Forschungsgemeinschaft [928/1-1]
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The cell wall of Candida albicans is central to the yeasts ability to withstand osmotic challenge, to adhere to host cells, to interact with the innate immune system and ultimately to the virulence of the organism. Little is known about the effect of culture conditions on the cell wall structure and composition of C. albicans. We examined the effect of different media and culture temperatures on the molecular weight (Mw), polymer distribution and composition of cell wall mannan and mannoprotein complex. Strain SC5314 was inoculated from frozen stock onto yeast peptone dextrose (YPD), blood or 5% serum agar media at 30 or 37 C prior to mannan/mannoprotein extraction. Cultivation of the yeast in blood or serum at physiologic temperature resulted in an additive effect on Mw, however, cultivation media had the greatest impact on Mw. Mannan from a yeast grown on blood or serum at 30 degrees C showed a 38.9 and 28.6% increase in Mw, when compared with mannan from YPD-grown yeast at 30 degrees C. Mannan from the yeast pregrown on blood or serum at 37 degrees C showed increased Mw (8.8 and 26.3%) when compared with YPD mannan at 37 degrees C. The changes in Mw over the entire polymer distribution were due to an increase in the amount of mannoprotein (23.8-100%) and a decrease in cell wall mannan (5.7-17.3%). We conclude that C. albicans alters the composition of its cell wall, and thus its phenotype, in response to cultivation in blood, serum and/or physiologic temperature by increasing the amount of the mannoprotein and decreasing the amount of the mannan in the cell wall.
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