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

Mannan-binding lectin (MBL) and MBL-associated serine protease 2 (MASP-2) are central components of the MBL pathway of complement activation, and may have potential as clinical biomarkers in colorectal cancer (CRC). Prior to clinical usage, knowledge of the biological variations of the molecules is...

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Published in:Scandinavian journal of immunology 2007-10, Vol.66 (4), p.458-464
Main Authors: Ytting, H, Christensen, I.J, Thiel, S, Jensenius, J.C, Svendsen, M.N, Nielsen, L, Lottenburger, T, Nielsen, H.J
Format: Article
Language:English
Subjects:
Adolescent
Adult
Age Factors
Aged
Circadian Rhythm - immunology
Female
Fluoroimmunoassay
Humans
Male
Mannose-Binding Lectin - blood
Mannose-Binding Lectin - immunology
Mannose-Binding Protein-Associated Serine Proteases - immunology
Mannose-Binding Protein-Associated Serine Proteases - metabolism
Middle Aged
Motor Activity - immunology
Sex Factors
Statistics, Nonparametric
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Summary:Mannan-binding lectin (MBL) and MBL-associated serine protease 2 (MASP-2) are central components of the MBL pathway of complement activation, and may have potential as clinical biomarkers in colorectal cancer (CRC). Prior to clinical usage, knowledge of the biological variations of the molecules is needed. We here investigate variations of MBL and MASP-2 in healthy persons over time and in relation to gender, age and physical activity. MBL and MASP-2 concentrations were determined in serum from healthy adults over a 3-week period and this was repeated 6 months later (n = 32); during a 24-h period (n = 16); and in relation to physical exercise (n = 14). Concentrations in serum and plasma were compared (n = 198). No significant variation over 6 months and no circadian variation was found for MBL (P = 0.39 and P = 0.34 respectively) or MASP-2 (P = 0.54 and P = 0.55). Physical exercise did not affect the levels (P > 0.8). Serum and plasma levels were only marginally different, and were independent of age and gender. Circulating levels of MBL and MASP-2 are stable over time in healthy individuals, which is advantageous for their potential application as biomarkers.
ISSN:0300-9475
1365-3083
DOI:10.1111/j.1365-3083.2007.01991.x