Mannose-Binding Lectin Levels and Variation During Invasive Candidiasis
The high morbi-mortality associated with invasive candidiasis (IC) is a persistent problem in hospitals. Mannose-binding lectin (MBL) plays a role in innate immunity through its interaction with mannosylated molecules of Candida albicans. A correlation between MBL deficiency and vulvovaginal candidiasis or peritonitis has been reported. We investigated circulating MBL levels and their evolution during the course of IC. Sixty-eight patients with proven IC, 82 hospitalized patients (HP) without evidence of infection, and 70 healthy subjects (HS) were studied in order to examine the relationship between serum MBL and IC. Serum MBL levels were measured by enzyme-linked immunosorbent assay (ELISA). MBL levels were significantly higher in IC patients than in HP and HS (p < 0.0001, p < 0.0055, respectively). A change in MBL concentrations was observed during the course of IC, with a dramatic decrease during the 2 days before positive blood culture sampling. This decrease was concomitant with the presence of high levels of circulating mannan (Mn). Like MBL levels, anti-mannan antibodies (AMn) increased after the mannanemia/blood culture period. These findings suggest a possible role of MBL during the early stage of IC. The mechanisms that regulate these observations in terms of effect and consequences on innate and adaptive immunity and the prognosis of IC require further investigation.
KeywordsMannose-Binding Lectin Candida albicans candidiasis serology mannanemia
This work was supported by a grant from the “Programme Hospitalier de Recherche Clinique du Ministère des Affaires Sociales, de la Santé et de la Ville.″ PHRC 1918, 2011-10-27, by INSERM, and by the European Community’s Seventh Framework Program (FP7-2007-2013) under grant agreement no. HEALTH-F2-2010-260338 ‘ALLFUN’. We thank Dr Val Hopwood for editing the manuscript.
All authors have no commercial relationship or conflict of interest of any nature related to the present study.
- 6.Minchinton RM, Dean MM, Clark TR, Heatley S, Mullighan CG. Analysis of the relationship between mannose-binding lectin (MBL) genotype. MBL levels and function in an Australian blood donor population Scand J Immunol. 2002;56:630–41.Google Scholar
- 7.Ytting H, Christensen IJ, Thiel S, Jensenius JC, Svendsen MN, Nielsen L, Lottenburger T, Nielsen HJ. Biological variation in circulating levels of mannan-binding lectin (MBL) and MBL-associated serine protease-2 and the influence of age, gender and physical exercise. Scand J Immunol. 2007;66:458–64.PubMedCrossRefGoogle Scholar
- 9.Eisen DP, Dean MM, Boermeester MA, Fidler KJ, Gordon AC, Kronborg G, Kun JF, Lau YL, Payeras A, Valdimarsson H, Brett SJ, Ip WK, Mila J, Peters MJ, Saevarsdottir S, van Till JW, Hinds CJ, McBryde ES. Low serum mannose-binding lectin level increases the risk of death due to pneumococcal infection. Clin Infect Dis. 2008;47:510–6.PubMedCrossRefGoogle Scholar