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利用整合素(ITGAL和ITGB2)对细胞外囊泡进行表面工程改造,以特异性靶向表达细胞间黏附分子-1(ICAM-1)的内皮细胞。

Extracellular vesicle surface engineering with integrins (ITGAL & ITGB2) to specifically target ICAM-1-expressing endothelial cells.

作者信息

Bergqvist Markus, Park Kyong-Su, Karimi Nasibeh, Yu Lijuan, Lässer Cecilia, Lötvall Jan

机构信息

Krefting Research Centre, Department of Internal Medicine and Clinical Nutrition, Institute of Medicine at Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.

出版信息

J Nanobiotechnology. 2025 Jan 30;23(1):64. doi: 10.1186/s12951-025-03125-3.

Abstract

Extracellular vesicles (EVs) are taken up by most cells, however specific or preferential cell targeting remains a hurdle. This study aims to develop an EV that targets cells involved in inflammation, specifically those expressing intercellular adhesion molecule-1 (ICAM-1). To target these cells, we overexpress the ICAM-1 binding receptor "lymphocyte function-associated antigen-1" (LFA-1) in HEK293F cells, by sequential transfection of plasmids of the two LFA-1 subunits, ITGAL and ITGB2 (CD11a and CD18). The LFA-1 receptor was strongly overexpressed on the EVs released by the transfected cells. We further loaded these EVs with a therapeutic peptide, targeting myeloid differentiation primary response 88 (Myd88; EV), through a developed EV open-and-close procedure. Myd88 is a downstream common intracellular messenger for most TLR-receptors. EV expression of LFA-1 increases EV binding to ICAM-1-expressing cells, an effect that was dose-dependently inhibited by a specific neutralizing ICAM-1 antibody. Further, activated human endothelial cells treated with LFA-1 EV had increased uptake of these EVs, resulting in dose-dependent inhibition of induced release of IL-8, presumably by targeting Myd88. We conclude that LFA-1-expressing EV may be a candidate suitable for delivering therapeutic peptides in inflammatory diseases associated with TLR-activation.

摘要

大多数细胞都会摄取细胞外囊泡(EVs),然而特异性或优先性细胞靶向仍然是一个障碍。本研究旨在开发一种靶向参与炎症的细胞的细胞外囊泡,特别是那些表达细胞间黏附分子1(ICAM-1)的细胞。为了靶向这些细胞,我们通过依次转染两个LFA-1亚基ITGAL和ITGB2(CD11a和CD18)的质粒,在HEK293F细胞中过表达ICAM-1结合受体“淋巴细胞功能相关抗原1”(LFA-1)。LFA-1受体在转染细胞释放的细胞外囊泡上强烈过表达。我们通过开发的细胞外囊泡开闭程序,进一步将一种靶向髓样分化初级反应88(Myd88;EV)的治疗性肽加载到这些细胞外囊泡中。Myd88是大多数TLR受体的下游常见细胞内信使。LFA-1的细胞外囊泡表达增加了细胞外囊泡与表达ICAM-1的细胞的结合,这种效应被特异性中和ICAM-1抗体剂量依赖性地抑制。此外,用LFA-1细胞外囊泡处理的活化人内皮细胞对这些细胞外囊泡的摄取增加,可能通过靶向Myd88导致诱导的IL-8释放受到剂量依赖性抑制。我们得出结论,表达LFA-1的细胞外囊泡可能是一种适合在与TLR激活相关的炎症性疾病中递送治疗性肽的候选物。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b011/11780982/674eb873c305/12951_2025_3125_Fig1_HTML.jpg

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