A matrix dispersion based on phospholipid complex system: preparation, lymphatic transport, and pharmacokinetics. (2nd April 2020)

• Record Type: Journal Article
• Authors: Li, Huixin; Lu, Sirun; Luo, Meiling; Li, Xiaoting; Liu, Suyan; Zhang, Tianhong
• Is Part Of: Drug development and industrial pharmacy. Volume 46:Number 4(2020)
• Page Start: 557
• Page End: 565
• Publication Date: 2020-04-02
• Subjects: Raloxifene hydrochloride -- phospholipid complex -- matrix dispersion -- lymphatic absorption -- oral bioavailability; Pharmaceutical chemistry -- Periodicals; Pharmaceutical industry -- Periodicals; Drug Industry -- Periodicals; Technology, Pharmaceutical -- Periodicals; 615.05
• DOI: 10.1080/03639045.2020.1735408
• Languages: English
• ISSNs: 0363-9045

Abstract

Abstract: Raloxifene hydrochloride (RH) suffers from low oral bioavailability due to its low water-solubility and first-pass metabolism. Therefore, a novel phospholipid complex of RH (RHPC) and a matrix dispersion based on phospholipid complex (RHPC-MD) were successfully prepared and optimized. Several methods were used to validate the formation of RHPC and RHPC-MD, such as differential scanning calorimetry, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, infrared spectroscopy, particle size, and zeta potential, meanwhile, their octanol–water partition coefficient, solubility, and dissolution in vitro were also evaluated. To investigate the absorption mechanism of RHPC in vivo, the RHPC was administered to the chylomicron flow blockage rat model. Interestingly, as we expected, a significant reduction in RHPC absorption (67%) (** p < .01) in presence of cycloheximide (CXI) inhibitor was observed, thus confirming the RHPC could be absorbed by lymphatic transport in vivo . Pharmacokinetic studies revealed that the relative oral bioavailability of RHPC as well as RHPC-MD was 223% and 329%, respectively, when comparing with the commercial RH tablets. These outcomes suggested that the current study provided an attractive formulation to enhance the oral bioavailability of RH and stimulated to further research the absorption mechanism of RHPC in vivo .