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Purpose@#Ischemic brain injury results in high mortality and serious neurologic morbidity. Here, we explored the role of SNHG15 in modulating neuronal damage and microglial inflammation after ischemia stroke. @*Materials and Methods@#The hypoxia/ischemia models were induced by middle cerebral artery occlusion in mice and oxygenglucose deprivation/reoxygenation (OGD/R) in vitro. Quantitative real-time PCR (qRT-PCR) and Western blot were conducted to determine the levels of SNHG15, miR-302a-3p, and STAT1/NF-κB. Moreover, gain- or loss-of functional assays of SNHG15 and miR-302a-3p were conducted. MTT assay was used to evaluate the viability of HT22 cells, and the apoptotic level was determined by flow cytometry. Furthermore, enzyme-linked immunosorbent assay was performed to detect oxidative stress and inflammatory mediators in the ischemia cortex and OGD/R-treated BV2 microglia. @*Results@#The SNHG15 and STAT1/NF-κB pathways were both distinctly up-regulated, while miR-302a-3p was notably down-regulated in the ischemia cortex. Additionally, overexpressing SNHG15 dramatically enhanced OGD/R-mediated neuronal apoptosis as well as the expression of oxidative stress and inflammation factors from microglia. In contrast, knocking down SNHG15 or overexpressing miR-302a-3p relieved OGD/R-mediated neuronal apoptosis and microglial activation. Moreover, the rescue experiment testified that overexpressing miR-302a-3p also attenuated SNHG15 up-regulation-induced effects. In terms of the mechanisms, SNHG15 sponged miR-302a-3p and activated STAT1/NF-κB as a competitive endogenous RNA, while miR-302a-3p targeted STAT1 and negatively regulated the STAT1/NF-κB pathway. @*Conclusion@#SNHG15 was up-regulated in the hypoxia/ischemia mouse or cell model. The inhibition of SNHG15 ameliorates ischemia/hypoxia-induced neuronal damage and microglial inflammation by regulating the miR-302a-3p/STAT1/NF-κB pathway.
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Objective To investigate the expression of anionic site in adriamycin-induced nephropathy (AN) rats, and to further explore the effects of Qufengtongluo Recipe on charge barrier in glomerulus in AN rats. Methods Adriamycin nephropathy was induced by a single tail intravenous injection of adriamycin. Totally 80 rats were randomly divided into normal control group and nephropathy model group. Three weeks later, the nephropathy model was established, and 50 AN rats were randomly divided into five groups: nephropathy model group (B, n=10), Qufeng group (C, n=10), prednisone and Qufeng group (D, n=10), prednisone group (E, n=10) and benazepri group (F, n=10), and they were treated respectively. With treatment being given respectively, renal tissue samples in each group were collected at week 3 and 7, respectively. The ultrastructure and expression of anionic site were examined by electron microscope observation. Results ① After adriamycin injection, a significant increase of the 24-hour urinary protein was observed at week 3 (P<0.01). In AN rats, serum albumin was decreased (P<0.01) while serum TCH and TG were increased (P<0.01). ② In AN rats the diffuse fusion and effacement of foot processes and decrease of anionic sites in GBM were observed at week 3. ③ At week 7, the average intensity of AS dramatically increased in C and E groups (P<0.01) compared with that in nephropathy model group. Conclusion The abnormal expression of AS is the important mechanism that leads to the occurrence and development of proteinuria in AN rats. It is possible that Qufengtongluo Recipe has effects on nephrotic syndrome through altering the charge barrier in GBM in glomerulus.
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Objective To investigate the expression of nephrin mRNA in adriamycin-induced nephropathy (AN) in rats, and to explore the effect of Qufengtongluo recipe on proteinuria in AN rats and on the expression of nephrin mRNA. Methods Adriamycin nephropathy was induced by a single tail intravenous injection of adriamycin. We randomly divided 140 rats into a normal control group (n=32) and a nephropathy model group (n=108). Three weeks later, 90 AN rats were randomly divided into 5 groups: a model group, a qufeng group, a qufeng and prednisone group, a prednisone group, and a benazepri group (18 rats in each group). They were treated respectively, and renal tissue samples were collected at week 0, 3, 5, and 7, respectively. The distribution and expression of nephrin mRNA were examined by indirect immunofluorescence and semi-quantity RT-PCR. Results In the AN rats, the diffuse fusion and effacement of foot processes were observed at week 3. The fluorescence intensity of nephrin and the expression of nephrin mRNA significantly increased in the qufeng group and the prednisone group compared with the model group at the week 7 (P＜0.01).Conclusion Abnormal expression of nephrin is the important molecular mechanism that leads to the occurrence and development of proteinuria in AN rats. Qufengtongluo recipe has effect on nephrotic syndrome through altering the expression and distribution of nephrin in glomerulus.
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OBJECTIVE: To investigate the effects of Qufeng Tongluo Recipe (QFTLR), a compound of traditional Chinese herbal medicine for dispelling wind and removing obstruction in the meridians, on cell proliferation and expressions of transforming growth factor-beta1 (TGF-beta1) and interleukin-6 (IL-6) mRNAs induced by lippolysaccharide in glomerular mesangial cells from rats. METHODS: The method of serum pharmacology was used. A total of 32 rats were divided into normal control group, untreated group, QFTLR group and positive control group which also was named Monopril (fosinopril sodium) group. Mesangial proliferative glomerulonephritis was induced by injection of antithymocyte serum in the rats except for the normal control group. Sera of the rats were obtained after corresponding interventions. Lipopolysaccharide-induced proliferation of rat mesangial cells (MCs) cultured in the respective serum-containing media was detected by the method of methyl thiazolyl tetrazolium (MTT) assay, and the expressions of TGF-beta1 and IL-6 mRNAs were analyzed by the method of reverse transcription polymerase chain reaction. RESULTS: Compared with the untreated group, QFTLR showed remarkable inhibitory function on the proliferation of the mesangial cells (P<0.05). The expressions of TGF-beta1 mRNA in mesangial cells were increased in the untreated group, QFTLR group and Monopril group when compared with the normal control group (P<0.01), but the TGF-beta1 mRNA expressions in QFTLR group and in Monopril group were lower than that in the untreated group. The IL-6 mRNA expression could be increased by the LPS stimulation, and it was significantly higher in the other three groups than that in the normal control group, including the untreated group, the Monopril group and the QFTLR group (P<0.01). Compared with the untreated group, the expression of IL-6 mRNA was decreased by QFTLR and Monopril (P<0.01). QFTLR was better than Monopril in inhibiting the proliferation of the mesangial cells and decreasing the expressions of TGF-beta1 and IL-6 mRNAs (P<0.05). CONCLUSION: QFTLR has great inhibitory effect on mesangial cell proliferation and expressions of TGF-beta1 and IL-6 mRNAs, which may be one of its mechanisms in postponing glomerular sclerosis.