Ajit Amita, Kumar T Retnabai Santhosh, Harikrishnan V S, Anil Arya, Sabareeswaran A, Krishnan Lissy Kalliyana
Division of Thrombosis Research, Department of Applied Biology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Poojappura, Thiruvananthapuram, Kerala 695012 India.
Integrated Cancer Research, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, Kerala 695014 India.
3 Biotech. 2023 Mar;13(3):83. doi: 10.1007/s13205-023-03496-0. Epub 2023 Feb 13.
The therapeutic potential of adipose tissue-derived mesenchymal stem cells (ADMSCs) is well studied for use in non-healing wounds. However, concerns on the transplantable cell number requirement, cell expansion, cell viability, retained cell multipotency and the limited cell implantation time for efficient impact hinders cell therapy. Recent literature is much inclined to the superiority of the ADMSCs' secretome, pre-dominating its paracrine-mediated therapeutic impact. In this context, the possibility of attaining accelerated wound angiogenesis through non-viral mediated enrichment of the ADMSCs secretome with pro-angiogenic growth factors (AGF) seems promising. Accordingly, this study aimed to explore the effect of AGF-enriched ADMSCs secretome for accelerating wound angiogenesis and repair in acute large area full thickness excision rabbit wound model, as adopted from Salgado et al. (Chir Buchar Rom 108:706-710, 1990). Using sub-dermal single-dose injections along the margin of the dorsal wound, native ADMSCs secretome, AGF-enriched ADMSC secretome, allogenic rabbit ADMSCs and a combination of AGF-enriched ADMSC secretome with allogenic rabbit ADMSCs were transplanted independently. Twenty-eight days (28 days) post-transplantation, histopathological analysis was performed to assess the effect. Hematoxylin and eosin (H&E) staining showed enhanced epithelization, notable granulation tissue and collagen fiber deposition in AGF-enriched secretome transplanted groups. This was confirmed by elevated CD31 detection, faster wound closure time and collagen organization. The use of single-dose AGF-enriched ADMSCs' secretome for therapeutic angiogenesis and wound repair seems to be a promising cell-free therapeutic option. Further investigations using multiple doses on larger animal groups remains to be explored in order to ascertain the comparative potential of AGF-enriched ADMSCs' secretome.
脂肪组织来源的间充质干细胞(ADMSCs)在治疗难愈合伤口方面的治疗潜力已得到充分研究。然而,对于可移植细胞数量的要求、细胞扩增、细胞活力、保留的细胞多能性以及为产生有效影响而受限的细胞植入时间等问题,阻碍了细胞治疗的发展。最近的文献更倾向于ADMSCs分泌组的优越性,其主要通过旁分泌介导治疗作用。在这种情况下,通过非病毒介导用促血管生成生长因子(AGF)富集ADMSCs分泌组来加速伤口血管生成的可能性似乎很有前景。因此,本研究旨在探讨富含AGF的ADMSCs分泌组对加速急性大面积全层切除兔伤口模型中伤口血管生成和修复的作用,该模型采用了Salgado等人(《Chir Buchar Rom 108:706 - 710, 1990》)的方法。沿着背部伤口边缘进行皮下单剂量注射,分别独立移植天然ADMSCs分泌组、富含AGF的ADMSC分泌组、同种异体兔ADMSCs以及富含AGF的ADMSC分泌组与同种异体兔ADMSCs的组合。移植后28天,进行组织病理学分析以评估效果。苏木精和伊红(H&E)染色显示,在富含AGF的分泌组移植组中上皮化增强、肉芽组织显著且胶原纤维沉积明显。这通过升高的CD31检测、更快的伤口闭合时间和胶原组织得以证实。使用单剂量富含AGF的ADMSCs分泌组进行治疗性血管生成和伤口修复似乎是一种有前景的无细胞治疗选择。为了确定富含AGF的ADMSCs分泌组的相对潜力,仍有待进一步研究使用多剂量对更大动物群体进行探索。