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[Study on nasal absorption of Cistanche deserticola phenylethanol glycosides nanoemulsion in vivo]. | LitMetric
To investigate the transnasal absorption characteristics of Cistanche deserticola phenylethanol glycosides nanoemulsion and its influencing factors. With the use of the classic in vivo nasal circulation perfusion model in rats, the absorption rate constant was used as the index to compare the nasal absorption characteristics of C. deserticola phenylethanol glycosides nanoemulsion and its aqueous solution in different concentrations, and to explore the effects of pH value of the preparation and absorption accelerator Azone on the nasal absorption of C. deserticola phenylethanol glycosides nanoemulsion. The results showed that, as compared with the aqueous solution group, the absorption rate constant was significantly higher in C. deserticola phenylethanol glycosides nanoemulsion with the same concentration(P<0.05), and C. deserticola phenylethanol glycosides nanoemulsion was more easily absorbed by the nasal cavity of rats; with the increase of the concentration of C. deserticola phenylethanol glycosides, the transnasal absorption amount of nanoemulsion was also increased in a dose-dependent manner. When the pH value of nanoemulsion was 6.0 and the ratio of Azone was 2%, the absorption rate constant was highest and the effect of promoting infiltration was the best.
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