机构：[1]Department of Stomatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, Sichuan 610072, P.R. China.四川省人民医院[2]School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, P.R. China.四川省人民医院[3]West China School and Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610063, P.R. China.[4]Department of Head and Neck Surgery, Sichuan Cancer Hospital, Chengdu, Sichuan 610041, P.R. China.外科中心头颈外科中心四川省肿瘤医院头颈外科
Hydroxyapatite scaffolds (HASs) are widely studied as suitable materials for bone replacement scaffolds due to their chemical similarities to organic materials. In our previous study, a novel HAS with a 25‑30‑µm groove structure (HAS‑G) exhibited enhanced osteogenesis of bone mesenchymal stromal cells (BMSCs) compared with HAS, potentially by modulating the macrophage‑induced immune microenvironment. However, the exact effects of different surface patterns on the physiological processes of attached cells is not known. The present study aimed to determine the effects of HAS‑G on the osteogenesis and physiological processes in BMSCs. Cell counting kit‑8 assays and propidium iodide staining followed by flow cytometry were performed, and the results demonstrated that both in normal medium and differentiating medium, HAS‑G promoted cell proliferation by decreasing the proportion of G1/G0 cells and decreased reactive oxygen species (ROS) accumulation in BMSCs compared with HAS. Detection markers of osteogenesis revealed that compared with HAS, HAS‑G increased runt‑related transcription factor 2, osteocalcin and osteopontin protein levels and promoted osteogenesis, which was further confirmed by Alizarin Red S staining. Following JC‑1 staining, it was observed that HAS‑G maintained the mitochondrial membrane potential, similar to that achieved by N‑acetylcysteine pretreatment. In addition, compared with those of HAS, HAS‑G decreased mitochondrial ROS levels, which potentially contributed to the promotion of osteogenesis. The results also demonstrated that HAS‑G inhibited mitophagy induced by ROS accumulation and ATP synthesis compared with HAS. In conclusion, HAS‑G decreased ROS accumulation and mitophagy and thus promoted osteogenesis of BMSCs, indicating that ROS modulation of HAS‑G may serve a key role in osteogenesis.
基金：
The present study was supported by Special Program
for Youth Scientific and Technologic Innovation Team
(grant no. 2016TD0008).
第一作者机构：[1]Department of Stomatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, Sichuan 610072, P.R. China.
通讯作者：
通讯机构：[1]Department of Stomatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, Sichuan 610072, P.R. China.[*1]Department of Stomatology, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, 32 West Section 2, 1st Ring Road, Chengdu, Sichuan 610072, P.R. China
推荐引用方式(GB/T 7714)：
Li Chenglong,Yang Lu,Ren Xiaohua,et al.Grooved hydroxyapatite scaffold modulates mitochondria homeostasis and thus promotes osteogenesis in bone mesenchymal stromal cells.[J].MOLECULAR MEDICINE REPORTS.2020,22(4):2801-2809.doi:10.3892/mmr.2020.11352.
APA：
Li Chenglong,Yang Lu,Ren Xiaohua,Lin Mu,Shen Daonan...&Mu Yandong.(2020).Grooved hydroxyapatite scaffold modulates mitochondria homeostasis and thus promotes osteogenesis in bone mesenchymal stromal cells..MOLECULAR MEDICINE REPORTS,22,(4)
MLA：
Li Chenglong,et al."Grooved hydroxyapatite scaffold modulates mitochondria homeostasis and thus promotes osteogenesis in bone mesenchymal stromal cells.".MOLECULAR MEDICINE REPORTS 22..4(2020):2801-2809
