1.Functions and mechanisms of long non-coding RNAs in lung cancer
Yanhua ZHAO ; Xinli ZHANG ; Wenling ZHANG
Chinese Journal of Clinical Oncology 2013;(23):1473-1476
Long non-coding RNAs (lncRNAs) are non-coding RNAs that have transcript lengths exceeding 200 bp and do not have the capacity for protein coding because of having no open reading frame. In the human genome, lncRNAs play important regulato-ry roles in the process of epigenetic, transcription and post-transcription, so they have become the focus of research followed by mi-croRNAs. The abnormal expression of lncRNAs in cancer usually represents different functions, such as the function of oncogenes or tumor suppressor genes, which promote or inhibit tumor growth. Lung cancer is a common malignant tumor with a five-year survival rate of 17%. Previous literature shows that MALAT1, H19, lincRNA p21, UCA1, and BC200 are closely related to the development of lung cancer. They could promote cancer growth, invasion and metastasis, apoptosis and induce drug resistance, and so on. This review aims to provide assistance in the diagnosis, treatment, and prognosis of lung cancer by clarifying the functions and mechanisms of ln-cRNAs.
2.Protective and therapeutic effects of Sagittara Sagittifolia L.Xiao-Zhi Pills on nonalcoholic steatohepatitis in rats
Yanhua MA ; Shaojun YANG ; Jianxiong ZHAO
Journal of Xi'an Jiaotong University(Medical Sciences) 2003;0(06):-
Objective To observe the preventive and therapeutic effects of Sagittara Sagittifolia L.Xiao-Zhi Pills on nonalcoholic steatohepatitis(NASH) in rats.Methods Rat NASH models were established and the rats were divided randomly into five groups: the normal group,model group,high-dosage group and low-dosage groups of the treatment,and Dongbao Gantai positive drug group.Histopathological changes of the liver were observed.The levels of MDA,superoxide dismutase(SOD),and NO(nitric oxide) in the liver homogenate were determined.Expressions of cyclooxygenase-2(cox-2) and inducible nitric oxide synthase(iNOS) in the liver were determined with immunohistochemical technique.Results In model group,extensive adipose degeneration and inflammatory cell infiltration were found in the liver.Compared with those in normal group,SOD activities in model group were obviously decreased(P
3.Establishing of rat heart failure model in myocardial infarction:the changes of cytokines
Yanhua LI ; Shiwen WANG ; Dong ZHAO
Clinical Medicine of China 2008;24(5):404-406
Objective To establish rat heart failure(HF)model following myocardial infarction(MI)and then detect the possible cytokines expression levels at different HF groups,so to explore the development of cytokines levels during the progression of heart failure.Methods The model was established by ligature of the left descending coronary artery.The rats were assessed by echocardiography and cardiac catheterization before and after 4 and 16 weeks following coronary ligature.Serum levels of TNF-α and IL-6 were determined.Results ①Serum cytokines could not be detectable in sham group using ELISA Methods,while in operated group,the concentration of TNF-α and IL-6 were significantly higher,especially IL-6.②The diagnosis coincidence between echocardiography and hemodynamics was high.Echocardiography can be used as an invasive measure to assess cardiac function in rat heart failure models.Conclusion ①Cytokines content is higher in compensated compared with the other two groups,especially to the IL-6 expression.②Cardiac ultrasound can be used as a useful method in monitoring postinfarction heart failure rat model,especially as an invasive measure.It can provide us successive data of the model.
4.Protective and therapeutic effects of Sagittara Sagittifolia L. Xiao-Zhi Pills on nonalcoholic steatohepatitis in rats
Yanhua MA ; Shaojun YANG ; Jianxiong ZHAO
Journal of Xi'an Jiaotong University(Medical Sciences) 2009;30(6):754-758
Objective To observe the preventive and therapeutic effects of Sagittara Sagittifolia L. Xiao-Zhi Pills on nonalcoholic steatohepatitis (NASH) in rats. Methods Rat NASH models were established and the rats were divided randomly into five groups: the normal group, model group, high-dosage group and low-dosage groups of the treatment, and Dongbao Gantai positive drug group. Histopathological changes of the liver were observed. The levels of MDA, superoxide dismutase (SOD), and NO (nitric oxide) in the liver homogenate were determined. Expressions of cyclooxygenase-2 (cox-2) and inducible nitric oxide synthase (iNOS) in the liver were determined with immunohistochemical technique. Results In model group, extensive adipose degeneration and inflammatory cell infiltration were found in the liver. Compared with those in normal group, SOD activities in model group were obviously decreased (P<0.01), the contents of MDA and NO were obviously increased (P<0.01), and the expressions of cox-2 and iNOS proteins were obviously increased (P<0.01). Compared with those in model group, the activities of SOD in treatment groups were obviously increased (P<0.01), the contents of MDA and NO were obviously decreased (P<0.01), and the expressions of COX-2 and iNOS proteins were obviously decreased (P<0.01). The effect of high-dosage group was more obvious than that of Dongbao Gantai group (P<0.05). Conclusion Sagittara Sagittifolia L. Xiao-Zhi Pills can effectively prevent and treat nonalcoholic steatohepatitis in rats, and its mechanism may be associated with ameliorating hepatocellular steatosis, removing the free radicals and enhancing the anti-oxidation and anti-inflammation capability.
5.Research for axon damage of tau protein in experimental autoimmune encephalo-myelitis
Yanhua ZHAO ; Doudou WEI ; Meini ZHANG
Chinese Journal of Immunology 2015;(5):620-624
Objective:To observe dynamic change of phosphorylated tau protein and non phosphorylated tau protein in axon and explore whether GSK3 in serum were related with phosphorylated tau protein in brain of EAE mice.Methods: Mice were randomly divided into six groups:EAE group of acute stage,EAE group of paralytic stage,EAE group of remission stage,control group of acute stage,control group of paralytic stage,control group of remission stage,each group had twelve mice.EAE model were constructed by MOG35-55 peptides in EAE group, the saline was used in control group.The nerve function scores and incidence were observed and compared.We observed degree of brain inflammation by HE staining and measured axons which contained two kinds of tau protein by immunohistochemistry.GSK3 in serum was tested to find correlation with phosphorylated tau protein in brain by ELISA method.Results:Nerve function scores in EAE group were higher than control group.The degree of inflammation damage was more serious in EAE group than control group,gradually enhancing with time.Phosphorylated tau protein in brain gradually increased before mice paralyzing(P<0.01),but it decreased when symptom relieved(P<0.01).GSK3 in serum were correlated with phosphorylated tau protein in brain(r=0.9326,P<0.01),linear regression equation:Y=2.950+0.418X.Conclusion:Phosphorylated tau protein in brain are correlated with axon damage and GSK3 in serum could indirectly reflect axon damage in brain.
6.Clinical characteristics and chemotherapy efficacy in patients with newly diagnosed multiple myeloma:observation of 176 cases
Shunji GAO ; Yanhua SUN ; Hongguo ZHAO
Journal of Leukemia & Lymphoma 2016;25(9):539-542
Objective To investigate the clinical characteristics and treatment efficacy in newly diagnosed multiple myeloma (MM). Methods The clinical data and treatment methods of 176 patients with newly diagnosed MM were retrospectively analyzed. Results The most common chief complaint in the patients with MM was bone pain. 26.1 % (46/176) patients once experienced misdiagnosis. The overall response rate (ORR) was 65.9 % (116/176), the ORR of bortezomib group (81.0 %, 34/42) was significantly higher than that of M2 regimen group (61.8 %, 34/55) and VAD regimen group (60.8 %, 48/79) (P<0.05). Between normal renal function subgroup and renal insufficiency subgroup in bortezomib group, the efficacy was no significant difference (P>0.05). The most common adverse reactions included hematologic toxicity, infection and peripheral neurotoxicity. Multiple organ failure was the main cause of death (47.1 %, 16/34). Conclusions The clinical manifestations of MM are complex and diverse, which is easy to be misdiagnosed. Molecular genetic abnormalities are closely related to prognosis. Proteasome inhibitor bortezomib can improve the curative effect and not be affected by renal function. To prolong the survival time of the patients needs to prevent and control the infection and renal insufficiency actively.
7.Epigallocatechin gallate inhibited proliferation and induced apoptosis of nasopharyngeal carcinoma cells by inhibiting expression of SIRT1
Li ZHAO ; Yuan QIN ; Yanhua HE ; Jingshen HOU ; Yi CAI
The Journal of Practical Medicine 2014;(10):1544-1547
Objective To examine the effect of epigallocatechin gallate (EGCG) at different concentration (0,10,25, 50 and 100μmol/L ) on proliferation rate and apoptosis of nasopharyngeal carcinoma cell line C666-1 in vitro, and elucidate the role of silent information regulator 1 (SIRT1). Methods The proliferation rate in vitro of C666-1 cells stimulated by EGCG at increasing concentrations (0,10,25,50,and 100 μmol/L)for 24 h or at concentration of 50μmol/L for 0,6,12 h and 24 h were detected by cell counting kit-8 (CCK-8) assays. Cell were treated with EGCG at concentration of 0,25, 50 and 100 μmol/L for 24 h, cell apoptosis was anylysed by TUNEL assay and expression levels of SIRT1 protein was detected by western blotting. Results EGCG suppressed cell proliferation of C666-1 cell line in a concentration-dependent manner at concentration of 0 ,10,25,50,and 100μmol/L, and in a time-dependently when treated with 50 μmol/L for 12 to 24 h(P<0.05). After treated for 24 h with different concentration of EGCG at 0、25、50、100 μmol/L, cell apoptosis increased at concentration of 50 to 100μmol/L and expression of SIRT1 decreased in a concentration-dependently (P<0.05). Conclusion EGCG induced cell apoptosis of C666-1 cells by down-regulating SIRT1 expression.
8.Effect of intracarotid or intravenous injection of propofol on the neuronal apoptosis of hippocampus in rats undergoing cardiopulmonary bypass
Yongjun ZHENG ; Xiangrui WANG ; Diansan SU ; Yanhua ZHAO
Chinese Pharmacological Bulletin 1986;0(05):-
Aim To compare the different effect of intracarotid and intravenous injection of propofol on the neuronal apoptosis of hippocampus in rats undergoing cardiopulmonary bypass.Methods Fifty rats were randomly assigned to five groups. Shame group (Group Non-CPB,n=10); group cardiopulmonary bypass(group CPB,n=10);group intravenous injection of propofol 2 mg?kg -1?h -1 (group P_ 2V,n=10);group intravenous injection of propofol 10mg.kg -1?h -1 (group P_ 10V,n=10);group intracarotid injection of propofol 2 mg?kg -1?h -1 (group P_ 2a,n=10).Mean arterial pressure(MAP)and heart rate(HR) were monitored. Changes of the neuronal apoptosis of hippocampus were observed with TUNEL staining, Bax and bcl-2 mRNA and protein expressions were measured by RT-PCR and Western blot. In addition,neuronal ultrastructures were observed. Results Neuronal apoptosis and changes of neuronal ultrastructures of hippocampus were attenuated in group P_ 2a and P_ 10V,but the apoptosis of neurons was not attenuated in group P_ 2v. Bcl-2 and Bax mRNA expression increased undergoing CPB. Bax mRNA expression decreased after CPB in group P_ 2a and P_ 10V. Bcl-2 mRNA expression increased in group P_ 2a and P_ 10V. But Bcl-2 and Bax mRNA expression in group P_ 2V was not significantly different compared with that of group CPB. Bcl-2 and Bax protein expression measured by Western blot showed the same trend with mRNA expressions. Compared with baseline values, MAP and HR in group P_ 2V and P_ 2a remained unchanged. But the MAP and HR in group P_ 10V changed compared with group CPB and baseline value.Conclusions intracarotid injection of propofol attenuated the injury of brain at a fraction of the intravenous dose and with less adverse systemic and cerebrovascular side effects.
9.Protection of ultra-filtration extract mixture from Angelica sinensis and Hedysarum polybotrys on oxidative damage in cardiomyocytes of neonatal rats and its mechanism
Yanhua MA ; Yingdong LI ; Jianxiong ZHAO ; Ting WANG
Chinese Traditional and Herbal Drugs 1994;0(04):-
Objective To investigate whether the administration of the ultra-filtration extract mixture from Angelica sinensis and Hedysarum polybotrys is able to protect cardiomyocytes from oxidative injury of rats induced by H2O2 and its potential mechanism. Methods Myocardial cells from 2—3 d neonatal rats were cultured in DF medium and the cellular injury was induced by H2O2. The ultra-filtration extract mixture from A. sinensis and H. polybotrys was given in three doses of 3.75,7.5,and 15 mg/mL. Morphological changes of cardiomyocytes were observed by microscope. Survival rate of myocardial cells was assessed using MTT. The cardiomyocyte damages were estimated by detecting lactate dehydrogenase (LDH) and creatine kinase (CK) releases in the medium,superoxide dismutase (SOD) activities and intracellular malondialdehyde (MDA),and myeloperoxidase (MPO) contents. The levels of caspase-3 and hsp70 expression in cardiomyocytes were measured by RT-PCR. Results The ultra-filtration extract mixture could protect the cardiomyocytes from H2O2 injury in a dose-dependent manner (3.75,7.5,and 15 mg/mL). The ultra-filtration extract mixture could significantly decrease LDH and CK leakages and intracellular MDA and MPO contents,increase SOD activity,upregulate hsp70 expression,and downregulate caspase-3 expression. Conclusion The ultra-filtration extract mixture has protection on cardiomyocytes injured by H2O2 through improving cell antioxidant ability,upregulating hsp70 expression,and inhibiting caspase-3 activity.