骨髓來源間充質(zhì)干細(xì)胞培養(yǎng)上清液減輕脂多糖誘導(dǎo)的小鼠急性肺損傷
[Abstract]:Aim: to observe the therapeutic effect of (MSCs CdM) on acute lung injury induced by lipopolysaccharide (LPS) in mice. Methods: bone marrow mesenchymal stem cells (BMSCs) were isolated and purified by whole bone marrow culture. Cell morphology was observed at the third passage, and cell surface markers were detected by flow cytometry. The supernatant was collected and centrifuged with ultrafiltration centrifuge tube. 30 BALB/c mice were randomly divided into control group, LPS model group and MSCs CdM treatment group. The model of acute lung injury was induced by intraperitoneal injection of normal saline (0. 01 mL/g), LPS) and intraperitoneal injection of LPS (5 mg/kg,0.01 mL/g) in the control group. The mice were sacrificed after 1 hour intravenous infusion of MSCs CdM (MSCs CdM or normal saline (LPS group or control group) for 1 hour. The lung tissue morphology and wet / dry weight ratio (W / D) of lung tissue were measured. Protein content in bronchoalveolar lavage fluid (BALF), cytokine level in serum and BALF and myeloperoxidase (MPO) activity in lung tissue. Results: compared with the control group, the pathological injury of lung tissue was serious after LPS treatment, and the contents of protein, serum tumor necrosis factor 偽 (TNF- 偽) and interleukin 6 (IL-6) in BALF were observed. The activity of MPO and the wet dry weight ratio of lung tissue increased significantly. Compared with LPS group, the pathological injury of lung tissue was alleviated in, MSCs CdM treatment group. The contents of BALF protein, serum TNF- 偽 and IL-6, the activity of MPO in lung tissue and the wet / dry weight ratio of lung tissue were significantly decreased in, MSCs CdM treatment group. The levels of interleukin 10 (IL-10) and keratinocyte growth factor (KGF) in BALF were significantly higher than those in LPS and control groups. Conclusion: the supernatant of bone marrow mesenchymal stem cell culture can effectively attenuate acute lung injury induced by LPS, and its mechanism may be related to the regulation of TNF- 偽, IL-6,IL-10 and KGF levels in lung.
【作者單位】: 第四軍醫(yī)大學(xué)西京醫(yī)院呼吸與危重癥醫(yī)學(xué)科;第四軍醫(yī)大學(xué)病理和病理生理教研室;
【基金】:國家自然科學(xué)基金資助項(xiàng)目(No.81072642;No.81372129)
【分類號(hào)】:R563.8
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