Journal
SCIENCE
Volume 295, Issue 5561, Pages 1898-1901Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1069540
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- NIGMS NIH HHS [GM07739] Funding Source: Medline
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Carbohydrates are thought to function as tags that mark circulatory glycoproteins for rapid clearance. To examine the role of the mannose receptor (MR) in glycoprotein clearance, we generated mice genetically deficient in MR. MR-/- mice were defective in clearing proteins bearing accessible mannose and N-acetylglucosamine residues and had elevated levels of eight different lysosomal hydrolases. Proteomic analysis of MR-/- and control mouse sera showed that an additional 4 out of 52 proteins identified were elevated in MR-/- serum. Each of these is up-regulated during inflammation and wound heating. Thus, MR appears to operate as an essential regulator of serum glycoprotein homeostasis.
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