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Activity of mannose-binding lectin (MBL) in centenarians

Tomaiuolo, Rossella and Ruocco, Anna and Salapete, Chiara and Carru, Ciriaco and Baggio, Giovannella and Franceschi, Claudio and Zinellu, Angelo and Vaupel, James W. and Bellia, Chiara and Lo Sasso, Bruna and Ciaccio, Marcello and Castaldo, Giuseppe and Deiana, Luca (2012) Activity of mannose-binding lectin (MBL) in centenarians. Aging Cell, Vol. 11 (3), p. 394-400. eISSN 1474-9726. Article.

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DOI: 10.1111/j.1474-9726.2012.00793.x


We analyzed MBL2 gene variants in two cohorts of centenarians, octo- and nonagenarians and in the general population, one from Sardinia island (Italy), recruited in the frame of the AKea study, and another from Campania (southern Italy), to search for haplotypes related to longevity. We also assessed in vitro the effect of mannose-binding lectin (MBL) on various human cells at different stage of senescence. The frequency of high and null activity haplotypes was significantly lower and the frequency of intermediate activity haplotype significantly higher in centenarians and in subjects between 80 and 99 years from both the cohorts as compared each to the general population from the same geographic area. Furthermore, serum MBL concentration (also after normalization to serum albumin) was significantly lower in centenarians and in octo- and nonagenarians as compared to the general population suggesting that intermediate MBL haplotype/activity may be protective. We also demonstrated that in vitro MBL protein bound to senescent IMR90 fibroblasts thereby causing cell lysis, but not to other types of cycle-arrested cells not in senescence. This implicates a novel role of MBL in the clearance of senescent cells.

Item Type:Article
ID Code:6990
Uncontrolled Keywords:Aging, senescence, innate immunity, MBL, haplotypes
Subjects:Area 05 - Scienze biologiche > BIO/12 Biochimica clinica e biologia molecolare clinica
Divisions:001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Scienze Biomediche
Publisher:Blackwell / Wiley
Copyright Holders:© 2012 The Authors, Aging Cell © 2012 Blackwell Publishing Ltd/Anatomical Society of Great Britain and Ireland
Deposited On:19 Jan 2012 16:57

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