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545945 occurrences (No.21 in the rank) during 5 years in the PubMed. [cache]
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545945 occurrences (No.21 in the rank) during 5 years in the PubMed. [cache]
| 153) The optimized phyllanthin-loaded SMEDDS formulation (phy-SMEDDS) and the resultant microemulsions were characterized by viscosity, self-emulsification performance, stability, morphology, droplet size, polydispersity index and zeta potential. |
| PMID:24237327 DOI:10.3109/03639045.2013.858732 |
| 2015 Drug development and industrial pharmacy |
| * Development of phyllanthin-loaded self-microemulsifying drug delivery system for oral bioavailability enhancement. |
| - Phyllanthin, a poorly water-soluble herbal active component from Phyllanthus amarus, exhibited a low oral bioavailability. This study aims at formulating self-microemulsifying drug delivery systems (SMEDDS) containing phyllanthin and evaluating their in-vitro and in-vivo performances. Excipient screening was carried out to select oil, surfactant and co-surfactant. Formulation development was based on pseudo-ternary phase diagrams and characteristics of resultant microemulsions. Influences of dilution, pH of media and phyllanthin content on droplet size of the resultant emulsions were studied. The optimized phyllanthin-loaded SMEDDS formulation (phy-SMEDDS) and the resultant microemulsions were characterized by viscosity, self-emulsification performance, stability, morphology, droplet size, polydispersity index and zeta potential. In-vitro dissolution and oral bioavailability in rats of phy-SMEDDS were studied and compared with those of plain phyllanthin. Phy-SMEDDS consisted of phyllanthin/Capryol 90/Cremophor RH 40/Transcutol P (1.38:39.45:44.38:14.79) in % w/w. Phy-SMEDDS could be emulsified completely within 6 min and formed fine microemulsions, with average droplet range of 27-42 nm. Phy-SMEDDS was robust to dilution and pH of dilution media while the resultant emulsion showed no phase separation or drug precipitation after 8 h dilution. The release of phyllanthin from phy-SMEDDS capsule was significantly faster than that of plain phyllanthin capsule irrespective of pH of dissolution media. Phy-SMEDDS was found to be stable for at least 6 months under accelerated condition. Oral absorption of phyllanthin in rats was significantly enhanced by SMEDDS as compared with plain phyllanthin. Our study indicated that SMEDDS for oral delivery of phyllanthin could be an option to enhance its bioavailability. |
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