Detoxication effect of water-soluble imprinted cross-linked chitosan on depleted uranium induced toxicity to renal cells / 药学学报
Acta Pharmaceutica Sinica
;
(12): 513-520, 2011.
Article
in Chinese
| WPRIM
| ID: wpr-348926
ABSTRACT
To investigate whether a series of water-soluble cross-linked chitosan derivates synthesized in the guide of imprinting technology could be used as a uranium chelating agent to protect cells exposed to depleted uranium (DU), the imprinted chitosan derivates with high UO2(2+) chelating ability were screened, and cell model of human renal proximal tubule epithelium cells (HK-2) exposed to DU (500 micromol.L-1) was built, chitosan derivates (400 mg.L-1 ) was added to test group and diethylenetriaminepentaacetic acid (DTPA, 50 mg.L-1) was added to positive control group. The results showed that three Cu2+ imprinted chitosan derivates had higher uranium chelating ability (>49 microg.mg-1) than chitosan and non-imprinted chitosan derivates. Compared to the cells exposed to DU only, survival of cells in group added chitosan derivates rose up significantly (increased from 57.3% to 88.7%, and DTPA to 72.6%), and DU intracellular accumulation decreased, membrane damage and DNA damage also eased. Among the imprinted chitosan derivates, Cu2+ imprinted penta dialdehyde cross-linked carboxymethyl chitosan (Cu-P-CMC) was the best, and better than DTPA. From ultrastructure observation, the DU precipitates of test group added Cu-P-CMC were most grouped in a big hairy clusters in a string together outside cells. It is possible that the DU-chitosan derivates precipitates are too big to enter into cells, and from this way, the DU uptake by cells decreased so as to detoxication.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pharmacology
/
DNA Damage
/
Water
/
Inactivation, Metabolic
/
Cell Line
/
Cell Survival
/
Chelating Agents
/
Chemistry
/
Uranium
/
Apoptosis
Limits:
Humans
Language:
Chinese
Journal:
Acta Pharmaceutica Sinica
Year:
2011
Type:
Article
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