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3124103 
Journal Article 
Fluorescence study on the aggregation of collagen molecules in acid solution influenced by hydroxypropyl methylcellulose 
Ding, C; Zhang, Min; Li, G 
2016 
Yes 
Carbohydrate Polymers
ISSN: 0144-8617
EISSN: 1879-1344 
ELSEVIER SCI LTD 
OXFORD 
136 
224-231 
English 
26572350 
WOS:000365972000029 
The effect of hydroxypropyl methylcellulose (HPMC) on the aggregation of collagen molecules with collagen concentrations of 0.25, 0.5 and 1.0mg/mL was studied by fluorescence techniques. On one hand, both the synchronous fluorescence spectra and fluorescence emission spectra showed that there was no change in the fluorescence intensity of collagen intrinsic fluorescence when 30% HPMC was added, while it decreased obviously when HPMC content ≥ 50%. From the two-dimensional fluorescence correlation analysis, it was indicated that collagen molecules in 0.25 and 0.5mg/mL collagen solutions were more sensitive to HPMC than those in 1.0mg/mL collagen solution. On the other hand, the pyrene fluorescence and the fluorescence anisotropy measurements indicated that HPMC inhibited the collagen aggregation for 0.25 and 0.5mg/mL collagen, but promoted it for 1.0mg/mL collagen. The atomic force microscopy images further confirmed the effect of HPMC on collagen with different initial states. 
Collagen; Aggregation; Hydroxypropyl met hylcellulose; Fluorescence