Depleting profibrotic macrophages using bioactivated in vivo assembly peptides ameliorates kidney fibrosis

Managing renal fibrosis is challenging owing to the complex cell signaling redundancy in diseased kidneys.Renal fibrosis involves an immune response dominated by macrophages,which activates myofibroblasts in fibrotic niches.However,macrophages exhibit high heterogeneity,hindering their potential as therapeutic cell targets.Herein,we aimed to eliminate specific macrophage subsets that drive the profibrotic immune response in the kidney both temporally and spatially.We identified the major profibrotic macrophage subset(Fn1+Spp1+Arg1+)in the kidney and then constructed a 12-mer glycopeptide that was designated as bioactivated in vivo assembly PK(BIVA-PK)to deplete these cells.BIVA-PK specifically binds to and is internalized by profibrotic macrophages.By inducing macrophage cell death,BIVA-PK reshaped the renal microenvironment and suppressed profibrotic immune responses.The robust efficacy of BIVA-PK in ameliorating renal fibrosis and preserving kidney function highlights the value of targeting macrophage subsets as a potential therapy for patients with CKD.

免疫电镜技术在肾脏疾病诊断和研究中的应用

免疫电镜技术是抗原抗体反应和电子显微镜相结合的技术,可在亚细胞和超微结构水平对抗原进行定位观察分析。其在肾脏疾病诊断和研究领域的应用包括单克隆免疫球蛋白沉积性肾病、免疫复合物介导的肾小球疾病、肾小球结构研究、肾小管疾病发病机制以及其他肾脏疾病。本文较为全面地展示了免疫电镜技术在肾脏疾病诊断和研究领域的重要作用和发展趋势,以期对今后相关领域的研究有所启发。