Abstract：
:We have purified five types of lectins, named tachylectins, from circulating hemocytes and hemolymph plasma of the Japanese horseshoe crab, Tachypleus tridentatus. Tachylectin-1 interacts with Gram-negative bacteria probably through 2-keto-3-deoxyoctonate, one of the constituents of lipopolysaccharides (LPS). Tachylectin-1 also binds to polysaccharides such as agarose and dextran with broad specificity. Tachylectin-2 binds to D-GlcNAc or D-GalNAc and recognizes staphylococcal lipoteichoic acids and LPS from several Gram-negative bacteria. In contrast, tachylectins-3 and -4 specifically bind to S-type LPS from several Gram-negative bacteria through a certain sugar moiety on the O-specific polysaccharides (O-antigens). Tachylectin-5 identified in hemolymph plasma has the strongest bacterial agglutinating activity in the five types of tachylectins, and exhibits broad specificity against acetyl group-containing substances. Thus, the innate immune system of horseshoe crab may recognize invading pathogens through a combinatorial method using lectins with different specificities against carbohydrates exposed on pathogens. An encounter of these lectins derived from hemocytes and hemolymph plasma at injured sites, in response to the stimulation of LPS, suggests that they serve synergistically to accomplish an effective host defense against invading microbes and foreign substances.
journal_name
Dev Comp Immunoljournal_title
Developmental and comparative immunologyauthors
Kawabata S,Iwanaga Sdoi
10.1016/s0145-305x(99)00019-1keywords:
subject
Has Abstractpub_date
1999-06-01 00:00:00pages
391-400issue
4-5eissn
0145-305Xissn
1879-0089pii
S0145-305X(99)00019-1journal_volume
23pub_type
杂志文章,评审abstract：:Interaction between interleukin (IL)-5 and its receptor (IL-5R) is important for the regulation of immunity against worm infections, allergic reactions and B cell response in mammals. In this study, we identified a full-length cDNA encoding chicken IL-5R α-chain (chIL-5Rα). The deduced amino acid sequence showed 41-43...
journal_title：Developmental and comparative immunology
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journal_title：Developmental and comparative immunology
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journal_title：Developmental and comparative immunology
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journal_title：Developmental and comparative immunology
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journal_title：Developmental and comparative immunology
pub_type： 杂志文章
doi：10.1016/0145-305x(95)00017-n
更新日期：1995-07-01 00:00:00
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journal_title：Developmental and comparative immunology
pub_type： 杂志文章
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journal_title：Developmental and comparative immunology
pub_type： 杂志文章,评审
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更新日期：2011-12-01 00:00:00
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journal_title：Developmental and comparative immunology
pub_type： 杂志文章,评审
doi：10.1016/s0145-305x(99)00075-0
更新日期：2000-03-01 00:00:00
