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Biomimetic Synthesis and Evaluation of Interconnected Bimodal Mesostructured MSF@Poly(Ethyleneimine)s for Improved Drug Loading and Oral Adsorption of the Poorly Water-Soluble Drug, Ibuprofen

Authors Xin W, Wang Y, Guo X, Gou K, Li J, Li S, Zhao L, Li H

Received 22 July 2020

Accepted for publication 1 September 2020

Published 5 October 2020 Volume 2020:15 Pages 7451—7468


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 3

Editor who approved publication: Dr Yan Shen

Wei Xin,1,2 Yumei Wang,3 Xianmou Guo,3 Kaijun Gou,3 Jing Li,3 Sanming Li,3 Lin Zhao,1 Heran Li1

1School of Pharmacy, China Medical University, Shenyang 110122, People’s Republic of China; 2The First Affiliated Hospital of China Medical University, Shenyang 110001, People’s Republic of China; 3School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, People’s Republic of China

Correspondence: Heran Li; Lin Zhao
School of Pharmacy, China Medical University, 77 Puhe Road, Shenyang North New Area, Shenyang 110122, People’s Republic of China
Tel +8613897945866
; +8618900911856

Purpose: The aim of this study was to improve the oral bioavailability and anti-inflammatory activity of the poorly soluble drug ibuprofen (IBU) by employing a new kind of poly(ethyleneimine)s (PEIs)-based mesocellular siliceous foam (MSF) called B-BMSF@PEI as drug carrier.
Methods: B-BMSF@PEI was biomimetically synthesized by using PEIs as templates, catalysts and scaffolds under ambient conditions, and the structural characteristics, including size, morphology, mesoscopic structure and pore properties, were estimated by TEM, SEM, FTIR and N2 desorption/adsorption measurement. Then, IBU was incorporated into B-BMSF@PEI at the drug:carrier weight ratio of 1:1. The structural features of IBU before and after drug loading were systemically characterized. IBU and B-BMSF@PEI were then subject to in vitro drug release study and wettability analysis. Finally, in vivo pharmacokinetics and anti-inflammatory pharmacodynamics studies were carried out to evaluate the efficacy of B-BMSF@PEI on improving the oral adsorption of IBU.
Results: The results demonstrated that B-BMSF@PEI was a meso–meso porous silica material with foam appearance. It consisted of uniform spherical cells (40 nm) with interconnected pore networks. IBU can be successfully loaded into B-BMSF@PEI with high efficiency (as high as 39.53%), and crystal IBU was effectively converted to an amorphous state during this process. Benefiting from the great architectures of B-BMSF@PEI, IBU/B-BMSF@PEI performed good wetting property and significantly improved the dissolution rate in both simulated gastric fluid (SGF) and simulated intestinal fluid (SIF). Notably, IBU exhibited very satisfactory relative bioavailability (681.4%) and anti-inflammatory effects (the inhibition rates were between the ranges of 113.5% to 1504.3%).
Conclusion: B-BMSF@PEI with bimodal mesoporous system and interconnected nanopores was obtained owing to the dynamic self-assembly functions of PEIs. It had superiority in drug loading and could improve the oral adsorption of ibuprofen to a satisfactory level.

Keywords: biomimetic synthesis, MSF, bimodal mesostructured, bioavailability, ibuprofen

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