To study the bioavailability of pueraria flavonoids bio-adhesive and floating pellets, the absorption of puerarin was studied using Caco-2 cell monolayer by liquid chromatography (HPLC) method, comparing the P(app) of pueraria flavonoids bio-adhesive and floating pellets with different bio-adhesive materials. Drugs were administered at a dose of 100 mg·kg(-1) via ig. The plasma concentration of puerarin was determined by HPLC, the pharmacokinetics were calculated with the WinNonlin 6.0 software. The results showed that the P(app) of bio-adhesive and floating pellets with hydroxypropyl methylcellulose (HPMC)-cabomer was largest, which had a significant difference (P < 0.05). The AUC(0-t) of pueraria flavonoids bio-adhesive and floating pellets was 1.79 times of pueraria flavonoids, the C(max) of pueraria flavonoids bio-adhesive and floating pellets and pueraria flavonoids had a significant difference (P < 0.05). What’s more the MRT had prolonged. In conclusion, pueraria flavonoids bio-adhesive and floating pellets with HPMC-cabomer could significantly facilitate the transport of puerarin on Caco-2 cellular monolayers. The bioavailability of pueraria flavonoids bio-adhesive and floating pellets with HPMC-cabomer was increased more than pueraria flavonoids with a sustained release effect.
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