Enhanced bone regeneration by low-intensity pulsed ultrasound and lipid microbubbles on PLGA/TCP 3D-printed scaffolds

BMC Biotechnology

Research

Liping Liu¹  Yanhong Hao¹  Yingchun Wang²  Jiali Shan²  Lin Jin³ 

[1] Department of Ultrasound, First Hospital of Shanxi Medical University, No. 85, Jiefang South Road, 030001, Taiyuan, Shanxi, China;Department of Ultrasound, Jiading District Central Hospital Affiliated Shanghai University of Medicine & Health Sciences, 201800, Shanghai, China;Department of Ultrasound, Jiading District Central Hospital Affiliated Shanghai University of Medicine & Health Sciences, 201800, Shanghai, China;Department of Ultrasound, Guanghua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, 200052, Shanghai, China;

关键词: Bone repair;    Low-intensity pulsed ultrasound;    Microbubble;    3D printing scaffold;    Scaffold;   

DOI  :  10.1186/s12896-023-00783-9

 received in 2022-12-03, accepted in 2023-05-23,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundTo investigate the effect of low-intensity pulsed ultrasound (LIPUS) combined with lipid microbubbles on the proliferation and bone regeneration of bone marrow mesenchymal stem cells (BMSCs) in poly (lactic-glycolic acid copolymer) (PLGA)/α-tricalcium phosphate (TCP) 3D-printed scaffolds.MethodsBMSCs were irradiated with different LIPUS parameters and microbubble concentrations, and the best acoustic excitation parameters were selected. The expression of type I collagen and the activity of alkaline phosphatase were detected. Alizarin red staining was used to evaluate the calcium salt production during osteogenic differentiation.ResultsBMSCs proliferation was the most significant under the condition of 0.5% (v/v) lipid microbubble concentration, 2.0 MHz frequency, 0.3 W/cm2 sound intensity and 20% duty cycle. After 14 days, the type I collagen expression and alkaline phosphatase activity in the scaffold increased significantly compared to those in the control group, and alizarin red staining showed more calcium salt production during osteogenic differentiation. After 21 days, scanning electron microscopy experiments showed that osteogenesis was obvious in the PLGA/TCP scaffolds.ConclusionLIPUS combined with lipid microbubbles on PLGA/TCP scaffolds can promote BMSCs growth and bone differentiation, which is expected to provide a new and effective method for the treatment of bone regeneration in tissue engineering.

【 授权许可】

CC BY   
© The Author(s) 2023

【 图 表 】

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