Abstract |
Severe burn shock remains an unsolved clinical problem with urgent needs to explore novel therapeutic approaches. In this study, the in vivo bioactivity of a series of synthetic lactosyl derivatives ( oligosaccharides) was assessed on rats with burn shock to elucidate the underlying mechanisms. Administration of An-2 and Gu-4, two lactosyl derivatives with di- and tetravalent beta-D: -galactopyranosyl-(1-4)-beta-D: -glucopyranosyl ligands, significantly prolonged the survival time (P < 0.05 vs. saline), stabilized blood pressure and ameliorated the injuries to vital organs after burn. Flow chamber assay displayed that An-2 and Gu-4 markedly decreased the adhesion of leukocytes to microvessel endothelial cells. Competitive binding assay showed that a CD11b antibody significantly interrupted the interaction of An-2 and Gu-4 with leukocytes from rats with burn shock. With fluorescent microscopy, we further found that the oligosaccharides were selectively bound to leukocytes and with a colocalization of CD11b on the cell membrane. Interestingly, the lectin domain-deficient form of CD11b failed to bind with An-2 and Gu-4. The results suggest that both An-2 and Gu-4 significantly inhibit the adhesion of leukocytes to endothelial cells by binding to CD11b and thereby exert protective effects on severe burn shock.
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Authors | Zhihui Zhao, Qing Li, Jiale Hu, Zhongjun Li, Jinghua Liu, Aihua Liu, Peng Deng, Lin Zhang, Xiaowei Gong, Kesen Zhao, Shuangquan Zhang, Yong Jiang |
Journal | Glycoconjugate journal
(Glycoconj J)
Vol. 26
Issue 2
Pg. 173-88
(Feb 2009)
ISSN: 1573-4986 [Electronic] United States |
PMID | 19020974
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- An-2 compound
- CD11b Antigen
- Gu-4 compound
- Oligosaccharides
- Propanolamines
- Glutamine
- Lactose
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Topics |
- Animals
- Burns
(drug therapy, metabolism)
- CD11b Antigen
(metabolism)
- Cell Adhesion
- Disease Models, Animal
- Endothelial Cells
(metabolism)
- Glutamine
(analogs & derivatives, chemistry, therapeutic use)
- Humans
- Lactose
(analogs & derivatives, chemistry, therapeutic use)
- Leukocytes
(drug effects, metabolism)
- Male
- Oligosaccharides
(chemistry, therapeutic use)
- Propanolamines
(chemistry, therapeutic use)
- Rats
- Rats, Sprague-Dawley
- Shock
(drug therapy, metabolism)
- Time Factors
- Transfection
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