骨形态发生蛋白 2、血管内皮生长因子和碱性成纤维细胞生长因子联合对破骨细胞分化和活性的抑制作用。
Inhibitory Effects of Combined Bone Morphogenetic Protein 2, Vascular Endothelial Growth Factor, and Basic Fibroblast Growth Factor on Osteoclast Differentiation and Activity.
机构信息
College of Biomedical Engineering, Sichuan University, Chengdu, P.R. China.
出版信息
Tissue Eng Part A. 2021 Nov;27(21-22):1387-1398. doi: 10.1089/ten.TEA.2020.0325. Epub 2021 Apr 13.
Bone morphogenetic protein 2 (BMP-2), vascular endothelial growth factor (VEGF), and basic fibroblast growth factors (bFGF) are important regulators of bone development and bone remodeling involving the coordination of osteoblast-mediated bone formation and osteoclast-mediated bone resorption. The synergistic promotions of these growth factors on osteogenesis in the appropriate combination have been confirmed by a lot of studies, but the effect of this combined application on osteoclastogenesis still remains ambiguous. On the basis of comparing the osteoclastic potentials under stimulation of BMP-2, VEGF, or bFGF alone, this study focused on their combined effects on the differentiation and activity of osteoclasts. Our results showed that osteoclastogenesis was enhanced to some extent under the stimulation of BMP-2, VEGF, or bFGF alone, and the potential of these three growth factors to stimulate osteoclastogenesis was VEGF > BMP-2 > bFGF. However, the treatment with the combination of BMP-2 (50 ng/mL), VEGF (1 ng/mL), and bFGF (10 ng/mL), the most suitable dose combination for osteogenesis optimized in our previous study, weakened osteoclast differentiation confirmed by smaller tartrate-resistant acid phosphatase (TRAP)-positive multinucleated cells, lower TRAP activity, and lower expression of dendritic cell-specific transmembrane protein, an important molecule regulating osteoclast fusion. Moreover, BMP-2, VEGF, and bFGF in combination also moderately inhibited the bone-resorbing activity of mature osteoclasts by suppressing the expression of osteoclast-specific genes cathepsin K, and matrix metalloproteinase-9. The underlying molecular mechanisms involved the suppression of the receptor activator of nuclear factor-κB ligand-induced c-Fos levels and the activation of nuclear factor of activated T cells c1, two major transcription factors in osteoclast differentiation. Taken together, our study showed that the combination of BMP-2 (50 ng/mL), VEGF (1 ng/mL), and bFGF (10 ng/mL) promoted osteoblastogenesis but inhibited osteoclastogenesis. Thus, the simultaneous use of BMP-2 (50 ng/mL), VEGF (1 ng/mL), and bFGF (10 ng/mL) in an appropriate combination might improve efficacious bone regeneration in a clinical setting. Impact statement Few studies have addressed the combined effects of multiple growth factors on osteoclasts. This study demonstrated that the simultaneous use of bone morphogenetic protein 2 (BMP-2; 50 ng/mL), vascular endothelial growth factor (VEGF; 1 ng/mL), and basic fibroblast growth factors (bFGF; 10 ng/mL), the most suitable dose combination for osteogenesis optimized in our previous study, showed inhibitory effects on the differentiation and activity of osteoclasts. Our results suggest that the growth factor signaling pathways in osteoclasts may interact with each other. Furthermore, this study could provide new insights into the optimal application of BMP-2, VEGF, and bFGF for bone repair and regeneration.
骨形态发生蛋白 2(BMP-2)、血管内皮生长因子(VEGF)和碱性成纤维细胞生长因子(bFGF)是骨发育和骨重塑的重要调节因子,涉及成骨细胞介导的骨形成和破骨细胞介导的骨吸收的协调。大量研究证实,这些生长因子在适当组合中的协同促进作用对成骨有积极影响,但它们联合应用对破骨细胞生成的影响仍存在争议。在比较 BMP-2、VEGF 或 bFGF 单独刺激下破骨细胞潜力的基础上,本研究重点研究了它们对破骨细胞分化和活性的联合作用。我们的结果表明,BMP-2、VEGF 或 bFGF 单独刺激在一定程度上增强了破骨细胞生成,这三种生长因子刺激破骨细胞生成的潜力为 VEGF>BMP-2>bFGF。然而,我们之前的研究优化了最适合成骨的 BMP-2(50ng/mL)、VEGF(1ng/mL)和 bFGF(10ng/mL)的组合剂量,用这种组合处理会减弱破骨细胞分化,这可以通过形成更少的抗酒石酸酸性磷酸酶(TRAP)阳性多核细胞、TRAP 活性降低以及树突状细胞特异性跨膜蛋白(一种调节破骨细胞融合的重要分子)的表达降低来证实。此外,BMP-2、VEGF 和 bFGF 的组合还通过抑制破骨细胞特异性基因组织蛋白酶 K 和基质金属蛋白酶-9 的表达,适度抑制成熟破骨细胞的骨吸收活性。潜在的分子机制涉及核因子-κB 配体诱导的 c-Fos 水平的抑制和激活 T 细胞激活核因子 c1,这两个是破骨细胞分化的主要转录因子。总之,我们的研究表明,BMP-2(50ng/mL)、VEGF(1ng/mL)和 bFGF(10ng/mL)的组合促进成骨细胞生成,但抑制破骨细胞生成。因此,在适当的组合中同时使用 BMP-2(50ng/mL)、VEGF(1ng/mL)和 bFGF(10ng/mL)可能会提高临床环境中骨再生的疗效。影响评估 很少有研究涉及多种生长因子对破骨细胞的联合作用。本研究表明,在我们之前的研究中优化的最适合成骨的剂量组合(BMP-2[50ng/mL]、VEGF[1ng/mL]和 bFGF[10ng/mL])同时使用时,对破骨细胞的分化和活性表现出抑制作用。我们的结果表明,破骨细胞中的生长因子信号通路可能相互作用。此外,本研究可为 BMP-2、VEGF 和 bFGF 用于骨修复和再生的最佳应用提供新的见解。