Cell Death Dis:纤溶酶原可促进放射性损伤伤口愈合

2020-04-02 MedSci原创 MedSci原创

放射性治疗作为各种肿瘤的重要治疗手段,对于非癌性的正常组织往往具有剂量限制性的病理效应。组织对辐射的敏感性取决于分裂细胞的数量。因此,具有较高增殖能力的正常组织(例如皮肤)受放射治疗的影响更为严重。

放射性治疗作为各种肿瘤的重要治疗手段,对于非癌性的正常组织往往具有剂量限制性的病理效应。组织对辐射的敏感性取决于分裂细胞的数量。因此,具有较高增殖能力的正常组织(例如皮肤)受放射治疗的影响更为严重。

放射性皮肤损伤可分为急性损伤和晚期损伤。在放射性照射后数小时至数周内会出现急性损伤反应,包括皮肤红斑,浮肿,脱屑和/或溃疡。大约95%接受放疗的癌症患者会出现此类皮肤副作用反应。然而目前尚没有针对这些症状的有效治疗方法。

在该研究中,研究人员发现血纤维蛋白溶酶原(纤溶酶原)可以通过对基因表达的多效性作用增强放射性损伤伤口的愈合。RNA测序结果显示纤溶酶原能够下调TLR、TNF、WNT、MAPK及TGF-β信号通路中相关基因的表达,同时能够增强花生四烯酸的抗炎作用,从而导致炎症反应显著减弱,改善肉芽组织的重塑。

此外,纤溶酶原可以诱导代谢改变,包括糖酵解水平的降低。重要的是,纤溶酶原诱导表达水平下调的许多因子都具有促纤维化的作用。因此,在具有过度炎症反应的放射性伤口中,纤溶酶原能够促进伤口愈合过程,从而使其更类似于生理性愈合过程,并显著降低纤维化的发生风险。

以上研究结果表明,纤溶酶原或可成为癌症患者治疗过程中放射性损伤伤口的有效的候选治疗药物。

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    2020-10-15 docwu2019
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