Stem Cell Res Ther:短期生理缺氧增强了间充质干细胞的功能

2018-11-01 MedSci MedSci原创

在骨髓中,MSCs存在于缺氧环境(1-5%O2)中,可保持其多能状态。通常,MSCs的体外扩增是在常氧(~21%O 2)下进行的,而该过程可损害细胞的功能。在这里,我们评估了在缺氧条件下培养的MSCs的特征和功能,并假设与常氧相比,专用缺氧会增加MSCs的功能特征。 从新鲜单核细胞获得人和猪骨髓MSCs。第一项研究评估了长期(10天)和短期(48小时)缺氧(1%O2)培养后的MSCs的功能。

在骨髓中,MSCs存在于缺氧环境(1-5%O2)中,可保持其多能状态。通常,MSCs的体外扩增是在常氧(~21%O 2)下进行的,而该过程可损害细胞的功能。在这里,我们评估了在缺氧条件下培养的MSCs的特征和功能,并假设与常氧相比,专用缺氧会增加MSCs的功能特征。

从新鲜单核细胞获得人和猪骨髓MSCs。第一项研究评估了长期(10天)和短期(48小时)缺氧(1%O2)培养后的MSCs的功能。在我们的第二项研究中,我们评估了在短期2%和5%缺氧条件下培养的MSCs的功能特征。评估MSCs的代谢活性、增殖、活力、克隆形成、基因表达和分泌能力。

结果显示,在长期培养中,常见的MSCs表面标志物表达(CD44和CD105)在缺氧条件下的表达下降。此外,在长期培养中,MSCs增殖明显较慢,并且在缺氧条件下产量较低。相反,在短期培养中,MSCs在缺氧条件下增殖明显更快。在长期和短期培养中,缺氧时MSCs代谢活性显着升高。此外,缺氧条件下培养的MSCs上调VEGF的表达,同时下调HMGB1和凋亡基因BCL-2和CASP3的表达。最后,在两种缺氧培养物中,促炎细胞因子IL-8被抑制,而抗炎药IL-1ra和GM-CSF的水平仅在短期缺氧时升高。

总之,在这项研究中,我们证明缺氧增强了猪和人类MSCs的治疗特性。然而,短期2%的缺氧总体上提供了最大的益处,例如与常氧相比,细胞增殖、自我更新能力以及关键基因和炎症环境的调节增加。这些结果对于为临床应用生成具有增强功能的MSCs非常重要。

原始出处:

Ben Antebi, Luis A Rodriguez, II, et al., Short-term physiological hypoxia potentiates the therapeutic function of mesenchymal stem cells. Stem Cell Res Ther. 2018; 9: 265.

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    2018-11-01 医者仁心5538

    学习了

    0