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Biological effects of near-infrared lasers on fibroblast cellular differentiation, proliferation and contraction

机译:近红外激光对成纤维细胞分化,增殖和收缩的生物学影响

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Combining near infrared (NIR) laser irradiation into a tumor treatment therapy has shown promising result s. For a comprehensive tumor therapy, it is important to understand the effects of NIR irradiation not only on the tumor, but on the tumor stroma as well. The composition of the microenvironment present near the tumor cells is critical to the phenotype of the tumor. Fibroblasts affect tissue homeostasis and change the microenvironment surrounding the tumor. Myofibroblast are derived from fibroblast cells, and in some cases indicate the transformation of healthy tissue into malignant tissue. Wound healing environments are rich in fibroblast cells and are similar to tumor stromas. To simulate a tumor stroma a wound healing environment was constructed. Two different human fibroblast cells were cultured in collagen lattices. Specifically, collagen lattices were created, with type 1 collagen, incubated for 5 days and irradiated with a 980nm laser on the 4th day. The subsequent collagen lattices were either released and measured, or fixed for immunostaining on the 5th day; the contraction rates also were analyzed. Furthermore, collagen lattices were stained to identify fibroblast proliferation and differentiation, into myofibroblasts. The results suggested NIR laser irradiation had some biological effects on the fibroblast cells, but the full extent of the effects is still unclear.
机译:将近红外(NIR)激光照射结合到肿瘤治疗疗法中表现出令人鼓舞的结果。对于全面的肿瘤治疗,重要的是要了解NIR辐射不仅对肿瘤的影响,而且对肿瘤基质的影响。存在于肿瘤细胞附近的微环境的组成对于肿瘤的表型至关重要。成纤维细胞影响组织稳态并改变肿瘤周围的微环境。肌成纤维细胞源自成纤维细胞,在某些情况下表明健康组织向恶性组织转化。伤口愈合环境富含成纤维细胞,与肿瘤基质相似。为了模拟肿瘤基质,构建了伤口愈合环境。在胶原蛋白晶格中培养了两种不同的人类成纤维细胞。具体而言,用1型胶原蛋白创建胶原蛋白晶格,孵育5天,并在第4天用980nm激光照射。随后释放并测量随后的胶原蛋白晶格,或在第5天固定以进行免疫染色;收缩率也进行了分析。此外,对胶原蛋白晶格进行染色以鉴定成纤维细胞增殖和分化为成肌纤维细胞。结果表明,近红外激光辐照对成纤维细胞具有一定的生物学作用,但作用的全部程度仍不清楚。

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