Stimuli-Responsive Codelivery System-Embedded Polymeric Nanofibers with Synergistic Effects of Growth Factors and Low-Intensity Pulsed Ultrasound to Enhance Osteogenesis Properties

被引：6

作者：

Malekmohammadi, Samira ^{[1
]}

Jamshidi, Rashid ^{[2
]}

Sadowska, Joanna M. ^{[3
,4
,5
]}

Meng, Chen ^{[1
]}

Abeykoon, Chamil ^{[1
]}

Akbari, Mohsen ^{[6
,7
]}

Gong, R. Hugh ^{[1
]}

机构：

[1] Univ Manchester, Dept Mat, Engn Bldg A, Manchester M13 9PL, England

[2] Manchester Metropolitan Univ, Dept Engn, Manchester M1 5GD, England

[3] Royal Coll Surgeons Ireland, Adv Mat & Bioengn Res Ctr AMBER, Dublin D02 YN77, Ireland

[4] Trinity Coll Dublin, Dublin D02 YN77, Ireland

[5] Royal Coll Surgeons Ireland, Dept Anat & Regenerat Med, Tissue Engn Res Grp, Dublin D02 YN77, Ireland

[6] Univ Victoria, Dept Mech Engn, Lab Innovat Microengn LiME, Victoria, BC V8P 5C2, Canada

[7] Terasaki Inst Biomed Innovat, Los Angeles, CA 90024 USA

来源：

ACS APPLIED BIO MATERIALS | 2024年

关键词：

drug delivery; low-intensity pulsed ultrasound; controlled release; bone tissue regeneration; dendriticsilica nanoparticles; scaffold; MESOPOROUS SILICA NANOPARTICLES; PROTEIN ADSORPTION; IN-VITRO; BONE REGENERATION; DRUG-RELEASE; SCAFFOLDS; DELIVERY; PEG; DIFFERENTIATION; PCL;

D O I：

10.1021/acsabm.4c00111

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The present work aims to develop optimized scaffolds for bone repair by incorporating mesoporous nanoparticles into them, thereby combining bioactive factors for cell growth and preventing rapid release or loss of effectiveness. We synthesized biocompatible and biodegradable scaffolds designed for the controlled codelivery of curcumin (CUR) and recombinant human bone morphogenic protein-2 (rhBMP-2). Active agents in dendritic silica/titania mesoporous nanoparticles (DSTNs) were incorporated at different weight percentages (0, 2, 5, 7, 9, and 10 wt %) into a matrix of polycaprolactone (PCL) and polyethylene glycol (PEG) nanofibers, forming the CUR-BMP-2@DSTNs/PCL-PEG delivery system (S0, S2, S5, S7, S9, and S10, respectively, with the number showing the weight percentage). To enhance the formation process, the system was treated using low-intensity pulsed ultrasound (LIPUS). Different advanced methods were employed to assess the physical, chemical, and mechanical characteristics of the fabricated scaffolds, all confirming that incorporating the nanoparticles improves their mechanical and structural properties. Their hydrophilicity increased by approximately 25%, leading to ca. 53% enhancement in their water absorption capacity. Furthermore, we observed a sustained release of approximately 97% for CUR and 70% for BMP-2 for the S7 (scaffold with 7 wt % DSTNs) over 28 days, which was further enhanced using ultrasound. In vitro studies demonstrated accelerated scaffold biodegradation, with the highest level observed in S7 scaffolds, approximately three times higher than the control group. Moreover, the cell viability and proliferation on DSTNs-containing scaffolds increased when compared to the control group. Overall, our study presents a promising nanocomposite scaffold design with notable improvements in structural, mechanical, and biological properties compared to the control group, along with controlled and sustained drug release capabilities. This makes the scaffold a compelling candidate for advanced bone tissue engineering and regenerative therapies.

引用

页码：4293 / 4306

页数：14