AIM: To investigate the effect of bone-marrow mesenchymal stem cells (BM MSCs) on the intestinal mucosa barrier in ischemia/reperfusion (I/R) injury. METHODS: BM MSCs were isolated from male Sprague-Dawley rats by den...AIM: To investigate the effect of bone-marrow mesenchymal stem cells (BM MSCs) on the intestinal mucosa barrier in ischemia/reperfusion (I/R) injury. METHODS: BM MSCs were isolated from male Sprague-Dawley rats by density gradient centrifugation, cultured, and analyzed by flow cytometry. I/R injury was induced by occlusion of the superior mesenteric artery for 30 min. Rats were treated with saline, BM MSCs (via intramucosal injection) or tumor necrosis factor (TNF)-α blocking antibodies (via the tail vein). I/R injury was assessed using transmission electron microscopy, hematoxylin and eosin (HE) staining, immunohistochemistry, western blotting and enzyme linked immunosorbent assay.RESULTS: Intestinal permeability increased, tight junctions (TJs) were disrupted, and zona occludens 1 (ZO-1) was downregulated after I/R injury. BM MSCs reduced intestinal mucosal barrier destruction, ZO-1 downregulation, and TJ disruption. The morphological abnormalities after intestinal I/R injury positively correlated with serum TNF-α levels. Administration of anti-TNF-α IgG or anti-TNF-α receptor 1 antibodies attenuated the intestinal ultrastructural changes, ZO-1 downregulation, and TJ disruption. CONCLUSION: Altered serum TNF-α levels play an important role in the ability of BM MSCs to protect against intestinal I/R injury.展开更多
目的 血小板-内皮细胞粘附分子-1(platelet endothelial cell adhesion molecule-1,PECAM-1)、胶质纤维酸性蛋白(glial fibrillary acidic protein,GFAP)、可溶性骨髓细胞样转录因子-1(soluble bone marrow cell-like transcription fac...目的 血小板-内皮细胞粘附分子-1(platelet endothelial cell adhesion molecule-1,PECAM-1)、胶质纤维酸性蛋白(glial fibrillary acidic protein,GFAP)、可溶性骨髓细胞样转录因子-1(soluble bone marrow cell-like transcription factor-1,sTLT-1)在急性脑梗死(acute cerebral infarction,ACI)患者中的表达及相关性研究。方法 选取2019年5月-2020年10月我院收治的ACI患者77例作为实验组,按照神经功能缺损评分量表(national institute of health stroke scale,NIHSS)评分分为轻度患者36例,中度患者25例,重度患者16例;根据磁共振成像(magnetic resonance imaging,MRI)反应的梗死面积将患者分为小面积梗死灶(small area of infarction,SI)38例、中度面积梗死灶(moderate area of infarct,MI)26例以及大面积梗死灶(large area of infarction,LI)13例,同时选取在我院同一时间点进行健康体检的健康人员77例作为正常组,采用酶联免疫吸附法检测PECAM-1、GFAP、sTLT-1水平。结果 与正常组相比,实验组PECAM-1、GFAP、sTLT-1显著升高,具有统计学差异(P<0.05);与轻度组相比,中度组和重度组水平升高,与中度组相比,重度组水平显著升高,具有统计学差异(P<0.05);与SI相比,Ml和LI水平升高,与MI相比,LI水平显著升高,具有统计学差异(P<0.05)。结论 PECAM-1、GFAP、sTLT-1在ACI患者血清中表现异常,与患者的严重程度、梗死面积有密切关系,可能参与ACI的发生发展,提示PECAM-1、GFAP、sTLT-1在ACI的临床诊断中具有一定作用。展开更多
Objective: The results of a previous study showed that a clear dysregulation was evident in the global gene expression of the BCL11A-suppressed B-lymphoma cells. In this study, the bone morphogenetic protein receptor,...Objective: The results of a previous study showed that a clear dysregulation was evident in the global gene expression of the BCL11A-suppressed B-lymphoma cells. In this study, the bone morphogenetic protein receptor, type II(BMPR2), E1 A binding protein p300(EP300), transforming growth factor-β2(TGFβ2), and tumor necrosis factor, and alpha-induced protein 3(TNFAIP3) gene expression patterns in B-cell malignancies were studied. Methods: The relative expression levels of BMPR2, EP300, TGFβ2, and TNFAIP3 mRNA in B-lymphoma cell lines, myeloid cell lines, as well as in cells from healthy volunteers, were determined by real-time quantitative reverse transcriptpolymerase chain reaction(qRT-PCR) with SYBR Green Dye. Glyceraldehyde-3-phosphate dehydrogenase(GAPDH) was used as reference. Results: The expression level of TGFβ2 mRNA in B-lymphoma cell lines was significantly higher than those in the cells from the healthy control(P<0.05). However, the expression level of TNFAIP3 mRNA in B-malignant cells was significantly lower than that of the healthy control(P<0.05). The expression levels of BMPR2 and EP300 mRNA showed no significant difference between B-malignant cell lines and the healthy group(P>0.05). In B-lymphoma cell lines, correlation analyses revealed that the expression of BMPR2 and TNFAIP3(r=0.882, P=0.04) had significant positive relation. The expression levels of BMPR2, EP300, and TNFAIP3 mRNA in cell lines from myeloid leukemia were significantly lower than those in the cells from the healthy control(P<0.05). The expression levels of TGFβ2 mRNA showed no significant difference between myeloid leukemia cell lines and the healthy control or B-malignant cell lines(P>0.05). The expression levels of BMPR2, EP300, and TNFAIP3 mRNA in B-lymphoma cells were significantly higher than those of the myeloid leukemia cells(P<0.05).Conclusion: Different expression patterns of BMPR2, EP300, TGFβ2, and TNFAIP3 genes in B-lymphoma cells exist.展开更多
基金Supported by Natural Science Foundation of China, No.81270528the Natural Science Foundation of Tianjin, No. 08JCYBJC08400, No. 11JCZDJC27800 and No. 12JCZDJC25200the Technology Foundation of Health Bureau in Tianjin, No.2011KY11
文摘AIM: To investigate the effect of bone-marrow mesenchymal stem cells (BM MSCs) on the intestinal mucosa barrier in ischemia/reperfusion (I/R) injury. METHODS: BM MSCs were isolated from male Sprague-Dawley rats by density gradient centrifugation, cultured, and analyzed by flow cytometry. I/R injury was induced by occlusion of the superior mesenteric artery for 30 min. Rats were treated with saline, BM MSCs (via intramucosal injection) or tumor necrosis factor (TNF)-α blocking antibodies (via the tail vein). I/R injury was assessed using transmission electron microscopy, hematoxylin and eosin (HE) staining, immunohistochemistry, western blotting and enzyme linked immunosorbent assay.RESULTS: Intestinal permeability increased, tight junctions (TJs) were disrupted, and zona occludens 1 (ZO-1) was downregulated after I/R injury. BM MSCs reduced intestinal mucosal barrier destruction, ZO-1 downregulation, and TJ disruption. The morphological abnormalities after intestinal I/R injury positively correlated with serum TNF-α levels. Administration of anti-TNF-α IgG or anti-TNF-α receptor 1 antibodies attenuated the intestinal ultrastructural changes, ZO-1 downregulation, and TJ disruption. CONCLUSION: Altered serum TNF-α levels play an important role in the ability of BM MSCs to protect against intestinal I/R injury.
文摘目的 血小板-内皮细胞粘附分子-1(platelet endothelial cell adhesion molecule-1,PECAM-1)、胶质纤维酸性蛋白(glial fibrillary acidic protein,GFAP)、可溶性骨髓细胞样转录因子-1(soluble bone marrow cell-like transcription factor-1,sTLT-1)在急性脑梗死(acute cerebral infarction,ACI)患者中的表达及相关性研究。方法 选取2019年5月-2020年10月我院收治的ACI患者77例作为实验组,按照神经功能缺损评分量表(national institute of health stroke scale,NIHSS)评分分为轻度患者36例,中度患者25例,重度患者16例;根据磁共振成像(magnetic resonance imaging,MRI)反应的梗死面积将患者分为小面积梗死灶(small area of infarction,SI)38例、中度面积梗死灶(moderate area of infarct,MI)26例以及大面积梗死灶(large area of infarction,LI)13例,同时选取在我院同一时间点进行健康体检的健康人员77例作为正常组,采用酶联免疫吸附法检测PECAM-1、GFAP、sTLT-1水平。结果 与正常组相比,实验组PECAM-1、GFAP、sTLT-1显著升高,具有统计学差异(P<0.05);与轻度组相比,中度组和重度组水平升高,与中度组相比,重度组水平显著升高,具有统计学差异(P<0.05);与SI相比,Ml和LI水平升高,与MI相比,LI水平显著升高,具有统计学差异(P<0.05)。结论 PECAM-1、GFAP、sTLT-1在ACI患者血清中表现异常,与患者的严重程度、梗死面积有密切关系,可能参与ACI的发生发展,提示PECAM-1、GFAP、sTLT-1在ACI的临床诊断中具有一定作用。
基金supported by the Guangdong Province Key Foundation of Science and Technology Program (Grant No.2009B0507000029)the Guangdong Province Science and Technology Program (Grant No.2012B031800474)a grant from the Overseas Chinese Affairs Office of the State Council Key Discipline Construction Fund (Grant No.51205002)
文摘Objective: The results of a previous study showed that a clear dysregulation was evident in the global gene expression of the BCL11A-suppressed B-lymphoma cells. In this study, the bone morphogenetic protein receptor, type II(BMPR2), E1 A binding protein p300(EP300), transforming growth factor-β2(TGFβ2), and tumor necrosis factor, and alpha-induced protein 3(TNFAIP3) gene expression patterns in B-cell malignancies were studied. Methods: The relative expression levels of BMPR2, EP300, TGFβ2, and TNFAIP3 mRNA in B-lymphoma cell lines, myeloid cell lines, as well as in cells from healthy volunteers, were determined by real-time quantitative reverse transcriptpolymerase chain reaction(qRT-PCR) with SYBR Green Dye. Glyceraldehyde-3-phosphate dehydrogenase(GAPDH) was used as reference. Results: The expression level of TGFβ2 mRNA in B-lymphoma cell lines was significantly higher than those in the cells from the healthy control(P<0.05). However, the expression level of TNFAIP3 mRNA in B-malignant cells was significantly lower than that of the healthy control(P<0.05). The expression levels of BMPR2 and EP300 mRNA showed no significant difference between B-malignant cell lines and the healthy group(P>0.05). In B-lymphoma cell lines, correlation analyses revealed that the expression of BMPR2 and TNFAIP3(r=0.882, P=0.04) had significant positive relation. The expression levels of BMPR2, EP300, and TNFAIP3 mRNA in cell lines from myeloid leukemia were significantly lower than those in the cells from the healthy control(P<0.05). The expression levels of TGFβ2 mRNA showed no significant difference between myeloid leukemia cell lines and the healthy control or B-malignant cell lines(P>0.05). The expression levels of BMPR2, EP300, and TNFAIP3 mRNA in B-lymphoma cells were significantly higher than those of the myeloid leukemia cells(P<0.05).Conclusion: Different expression patterns of BMPR2, EP300, TGFβ2, and TNFAIP3 genes in B-lymphoma cells exist.
