背景:梯度人工骨修复支架模拟了骨骼系统中的独特特征,在骨骼系统再生中具有巨大的应用潜力。目的:综述梯度人工骨修复支架在骨骼系统组织工程中的最新研究进展,并阐述了其优势与制造策略。方法:由第一作者检索Web of Science和PubMed...背景:梯度人工骨修复支架模拟了骨骼系统中的独特特征,在骨骼系统再生中具有巨大的应用潜力。目的:综述梯度人工骨修复支架在骨骼系统组织工程中的最新研究进展,并阐述了其优势与制造策略。方法:由第一作者检索Web of Science和PubMed数据库2000-2023年发表的文献,英文检索词为“gradient,bone regeneration,scaffold”,最终筛选后对76篇文献进行分析总结。结果与结论:①作为骨骼系统组织高效、高质量修复的重要手段,梯度人工骨修复支架目前针对骨组织、骨-软骨、肌腱-骨组织的天然梯度特征进行了仿生设计,这些支架能够一定程度地从结构、成分上模拟原生组织的细胞外基质,从而促进细胞黏附、迁移、增殖和分化,促进受损组织向原生状态再生恢复。②先进制造技术为梯度人工骨修复支架制备提供了更多可能;目前已经开发了通过空间差异化纤维排布和生物活性物质加载构建的梯度电纺纤维支架;分层叠加、分级孔隙率与生物3D打印技术制造的梯度3D打印支架;原位分层注射、简单逐层叠加、冷冻干燥法制造的梯度水凝胶支架;另外还包括其他方式或多方法联用的支架;这些支架在体外实验中展示了良好的生物相容性,在小型动物实验中能够加速组织再生并且观察到组织学结构明显改善。③目前开发的梯度人工骨修复支架仍需进一步优化,提高在梯度尺度上的匹配性,进一步明确材料与组织相互作用,避免降解产物导致的副反应等问题,未来需要结合相关学科优势与临床需求进一步优化。展开更多
Rheumatoid arthritis(RA)is an inflammatory autoimmune disease triggered by antigenic peptides with environmental and genetic risk factors.It has been shown that antigen-specific targeting could be a promising therapeu...Rheumatoid arthritis(RA)is an inflammatory autoimmune disease triggered by antigenic peptides with environmental and genetic risk factors.It has been shown that antigen-specific targeting could be a promising therapeutical strategy for RA by restoring immune tolerance to self-antigens without compromising normal immunity.Citrullination of antigens enhances antigenic properties and induces autoimmune responses.Here,we showed that citrullinated antigenic(citAg)vaccine ameliorated collageninduced arthritis with decreased T-helper 1(Th1)and Th17 cells,downregulated proinflammatory cytokines including interlukin-6 and tumor necrosis factor-a,and inhibited antigen recall responses.B cell receptor sequencing further revealed that citAg vaccine could dampen the dysregulated V(D)J recombination,restoring the immune repertoire.Taken together,the results demonstrated that citAg vaccine might have a therapeutic effect on RA.展开更多
文摘背景:梯度人工骨修复支架模拟了骨骼系统中的独特特征,在骨骼系统再生中具有巨大的应用潜力。目的:综述梯度人工骨修复支架在骨骼系统组织工程中的最新研究进展,并阐述了其优势与制造策略。方法:由第一作者检索Web of Science和PubMed数据库2000-2023年发表的文献,英文检索词为“gradient,bone regeneration,scaffold”,最终筛选后对76篇文献进行分析总结。结果与结论:①作为骨骼系统组织高效、高质量修复的重要手段,梯度人工骨修复支架目前针对骨组织、骨-软骨、肌腱-骨组织的天然梯度特征进行了仿生设计,这些支架能够一定程度地从结构、成分上模拟原生组织的细胞外基质,从而促进细胞黏附、迁移、增殖和分化,促进受损组织向原生状态再生恢复。②先进制造技术为梯度人工骨修复支架制备提供了更多可能;目前已经开发了通过空间差异化纤维排布和生物活性物质加载构建的梯度电纺纤维支架;分层叠加、分级孔隙率与生物3D打印技术制造的梯度3D打印支架;原位分层注射、简单逐层叠加、冷冻干燥法制造的梯度水凝胶支架;另外还包括其他方式或多方法联用的支架;这些支架在体外实验中展示了良好的生物相容性,在小型动物实验中能够加速组织再生并且观察到组织学结构明显改善。③目前开发的梯度人工骨修复支架仍需进一步优化,提高在梯度尺度上的匹配性,进一步明确材料与组织相互作用,避免降解产物导致的副反应等问题,未来需要结合相关学科优势与临床需求进一步优化。
基金supported by the Guangdong Basic and Applied Basic Research Foundation(2020B1515130005)the National Natural Science Foundation of China(82371807,82171773,92374202,and 32141004)+1 种基金the National Key R&D Program of China(2022YFC3602000)the Beijing Nova Program(Z181100006218044 and Z211100002121163)。
文摘Rheumatoid arthritis(RA)is an inflammatory autoimmune disease triggered by antigenic peptides with environmental and genetic risk factors.It has been shown that antigen-specific targeting could be a promising therapeutical strategy for RA by restoring immune tolerance to self-antigens without compromising normal immunity.Citrullination of antigens enhances antigenic properties and induces autoimmune responses.Here,we showed that citrullinated antigenic(citAg)vaccine ameliorated collageninduced arthritis with decreased T-helper 1(Th1)and Th17 cells,downregulated proinflammatory cytokines including interlukin-6 and tumor necrosis factor-a,and inhibited antigen recall responses.B cell receptor sequencing further revealed that citAg vaccine could dampen the dysregulated V(D)J recombination,restoring the immune repertoire.Taken together,the results demonstrated that citAg vaccine might have a therapeutic effect on RA.
