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Statins are a class of hydroxymethylglutaryl-CoA reductase inhibitors (HMG-CoA reductase inhibitors), which are widely used to reduce blood lipid in clinic, and are especially important for the prevention and treatment of cardiovascular diseases. In recent years, many studies at home and abroad believe that statins have a unique role in tumor prevention and treatment, and have been widely concerned. In terms of epigenetic regulation mechanism, statins mainly affect the progress of tumor through DNA methylation, histone modification and miRNA regulation. In addition, statins can also achieve their anti-tumor effects by promoting tumor cell autophagy, regulating tumor cell cycle, and promoting tumor cell apoptosis and other signaling pathways. Therefore, the research on statins provides ideas for the discovery of new anti-tumor treatments. In this paper, the role of statins in the prevention and treatment of common tumors is reviewed, including its mechanism of inhibiting the occurrence and development of tumors through epigenetic regulation and other related mechanisms, as well as its clinical research status.
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Aim To evaluate the effects of salvianolic acid B ( Sal B ) on bone metabolism and its potential mechanism in high fat diet ( HFD) mice.Methods Thirty C57BL/6J male mice were divided into three groups with 10 mice each, namely normal , HFD and HFD+Sal B.HFD and HFD+Sal B mice were treated with HFD, and HFD+Sal B group mice were also with Sal B (125 mg· kg -1· d-1).After 12 weeks' treat-ment, femurs were harvested .The effects of Sal B on biomechanical strength were evaluated by biomechani-cal tests, and the effects of Sal B on bone microstruc-ture were evaluated by Safranin O/fast green staining and hematoxylin and eosin staining .The expression of nuclear factor-kappa B ( NF-κB)-p65 and NADPH ox-idase 4 ( Nox4 ) and cathepsin K in femurs was deter-mined by immunohistochemical staining . Results Maximum load and elastic load significantly decreased ,and the trabeculae became thinner and irregular in the femurs of HFD mice , while Sal B treatment could re-verse the descending biomechanical strength and the disorganized femurs bone micro-structures in HFD mice.In addition, the expressions of Nox4, NF-κB-p65 and cathepsin Kmarkedly increased in HFD mice , and Sal B possessed the ability to down-regulate the ex-pression of Nox4, NF-κB-p65, and cathepsin K in the femurs triggered by HFD .Conclusions Sal B treat-ment improves bone metabolism via regulating Nox 4/NF-κB/cathepsin K signaling pathway in HFD mice . The findings contribute to the understanding and exten-sion of the applications of Salvia miltiorrhiza and its constituents on osteoporosis .
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Objective:To observe serum osteoprotegerin (OPG),receptor activator of NF-kB ligand (RANKL) levels and the therapeutic effect of Rong Huang granules of patients with non-dialysis chronic kidney disease mineral and bone metabolism disorder (CKD-MBD) and kidney deficiency damp heat syndrome.Methods:70 cases of non-dialysis CKD-MBD with kidney deficiency damp heat syndrome,were randomly divided into treatment group and control group,the actual completion of 61 cases,30 cases in treatment group,31 cases in the control group;and a healthy normal group of 20 cases of patients was established.Two groups of patients were given symptomatic treatment,in addition,Rong Huang granules was plused in treating at treatment group and it was used three times a day,each time blunt one bag.The course of treatment was 8 weeks.The changes of kidney deficiency damp heat syndrome,blood urea nitrogen (BUN),serum creatinine (Scr),estimated glomerular filtration rate (eGFR),serum of calcium (Ca),phosphorus (P), alkaline phosphatase (ALP),parathyroid hormone (iPTH),OPG and RANKL levels were observed in two groups of patients.Results:The total effective rate in treatment group was significantly better than the control group(P<0.01).The integral value of syndrome decreased more significantly with the course of treatment increased of two groups of patients(P<0.01).Compared with the same period of therapy,the descender in the treatment group was significantly better than that in the control group(P<0.01).The levels of BUN, Scr,eGFR,Ca,P,iPTH and ALP were improved in the treatment group after treatment(P<0.05 or P<0.01),BUN and iPTH were improved in the control group(P<0.05 or P<0.01),other indexes were not improved(P>0.05).After treatment,BUN,Scr,eGFR,Ca, P,iPTH,ALP of treatment group were significantly better than the control group(P<0.05 or P<0.01).Compared with the normal group,the levels of OPG and RANKL were significantly higher in CKD-MBD patients (P<0.01).After treatment,serum OPG level, serum RANKL level and OPG/RANKL ratio were significantly improved than before treatment in treatment group(P<0.05 or P<0.01),and in the control group,only the OPG/RANKL ratio increased(P<0.01).After treatment,OPG,RANKL and OPG/RANKL ratio in the treatment group were obviously improved compared with them in the control group(P<0.05 or P<0.01).Conclusion:The levels of OPG and RANKL in non-dialysis CKD-MBD patients with kidney deficiency damp heat syndrome were higher than those in healthy people,and the ratio of OPG/RANKL was lower than that in healthy people.Rong Huang granules can ameliorate clinical symptoms,prevent calcium and phosphorus metabolism,improve renal function,the mechanism may be related to the ameliorate of serum OPG and the decrease of serum RANKL level and the raise of ratio of OPG/RANKL.
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BACKGROUND: Thoracolumbar fracture is commonly seen in spinal injuries, which causes loss of stability of the spine, as well as spinal cord and nerve compression, even deformity and paralysis. The diagnosis and treatment of thoracolumbar fracture remain controversial.OBJECTIVE: To summarize the mechanism of thoracolumbar fracture based on finite element method, its classification and transpedicular screw fixation.METHODS: The first author retrieved CNKI and PubMed databases for the relevant literature published between January 2000 and December 2016. The keywords were "finite element method, thoracolumbar spine fracture,transpedicular screw fixation" in Chinese and English, respectively.RESULTS AND CONCLUSION: (1) The finite element analysis method can simulate the mechanism of thoracolumbar fracture and provides a reference for the studies on the occurrence, development and treatment of thoracolumbar fracture. (2) The classification of thoracolumbar fracture is beneficial for planning a rational treatment strategy and evaluating prognosis. (3) Compared with the traditional screw fixation, the transpedicular screw fixation holds advantages in biomechanical stability and postoperative correction effect. (4) There are various classifications for thoracolumbar fracture; differences in severity and cartilage injury are difficult to simulate completely. (5) The finite element analysis method shows certain application limitations due to long learning curve and modeling time as well as complicated calculations.
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OBJECTIVE Lapachol is a natural naphthoquinone compound that possesses extensive biological activities. The aim of this study is to investigate the inhibitory effects of lapachol on rat C6 glioma both in vitro and in vivo, as well as the potential mechanisms. METHODS The antitumor effect of lapachol was firstly evaluated in the C6 glioma model in Wistar rats. The effects of lapachol on C6 cell proliferation, apoptosis and DNA damage were detected by 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS)/ phenazinemethosulfate (PMS) assay, hoechst 33358 staining, annexinⅤ-FITC/PI staining, and comet assay. Effects of lapachol on topoisomerase I (TOP I) and topoi?somerase Ⅱ (TOP Ⅱ) activities were detected by TOP Ⅰ and TOP Ⅱ mediated supercoiled pBR322 DNA relaxation assays and molecular docking. TOPⅠ and TOPⅡ expression levels in C6 cells were also determined. RESULTS High dose lapachol showed significant inhibitory effect on the C6 glioma in Wistar rats (P<0.05). It was showed that lapachol could inhibit proliferation, induce apoptosis and DNA damage of C6 cells in dose dependent manners. Lapachol could inhibit the activities of both TOPⅠ and Ⅱ. Lapachol-TOPⅠ showed relatively stronger interaction than that of lapachol-TOPⅡ in molecular docking study. Also, lapachol could inhibit TOPⅡ expression levels, but not TOPⅠ expression levels. CONCLUSION These results showed that lapachol could significantly inhibit C6 glioma both in vivo and in vitro, which might be related with inhibiting TOPⅠ and TOPⅡ activities, as well as TOPⅡ expression.
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Objective To investigate the effects of adenosine 5'-monophosphate-activated protein kinase (AMPK) and phosphated AMPK (pAMPK) signals in ischemic preconditioning (IPC), and the effect of pharmacological intervention of AMPK on infarct size of the brain. Methods A brief (3min) middle cerebral artery occlusion (MCAO) was employed to induce IPC in male rat, and another 90-min MCAO was performed 4 or 72h later. The levels of AMPK and pAMPK were assessed after IPC. A pharmacological activator metformin, or inhibitor compound C of AMPK, was used to analyze the correlation of IPC to AMPK signaling in MCAO rats. Results The infarct size of total cerebral hemisphere and cortex was significantly decreased in MCAO animals by IPC for 72h (P0.05, n=6). The AMPK activator metformin can significantly reverse the protective effect of IPC (P<0.05, n=6). Conclusions The signals of AMPK and pAMPK play an important role in neuroprotective effect of IPC on cerebral ischemic injury. The neuroprotective effect of IPC may be associated with the down-regulation of pAMPK.