2.Neuroprotective mechanisms of histone deacetylase inhibitors in ischemic stroke
International Journal of Cerebrovascular Diseases 2010;18(5):358-362
Histone deacetylases (HDACs) catalyze the deacetylation of histone and nonhistone proteins. They play important roles in regulating chromatin remodeling and gene transcription,and that aberrant chromatin remodeling and transcriptional dysregulation are associated with many neurodegenerative diseases. Preclinical studies have suggested that histone deacetylases inhibitors (HDACIs) can target diverse pathophysiologies of ischemic stroke,not only reduce neuronal damage and infarct volume,but also promote the neuronal plasticity and functional recovery after ischemia. This article mainly reviews the neuroprotective mechanisms of HDACIs in ischemic stroke.
3.Influence of Xuebij ing in production of NO and expressions of iNOS and NF-κB induced by LPS in vascular endothelial cells
Journal of Jilin University(Medicine Edition) 2014;(5):997-1001
Objective To investigate the protective effects of Xuebijing(XBJ)on the injury of vascular endothelial cells(VEC)induced by lipopolysaccharide (LPS),and to study the mechanisms of the production of nitric oxide (NO)and the expressions of inducible nitric oxide sytnhase (iNOS)and signal transduction under XBJ intervention condition.Methods The cultured VEC were divided into control group, LPS (1 mg · L-1 )group, LPS (1 mg·L-1)+XBJ(25 g·L-1)group,LPS(1 mg·L-1)+pyrrolidine dithiocarbamate(PDTC,20μmol·L-1) group;XBJ and PDTC were administrated 1 h before incubation of with LPS.Western blotting method was used to detect the expressions of iNOS and NF-κB p65 protein.The level of NO in the supernatant was measured by Griess reagent.Results Comparaed with control group,the NO level and the expression levels of iNOS protein and NF-κB p65 protein in VEC in LPS group were significantly increased(P<0.01).Compared with LPS group,the NO level and the expression levels of iNOS protein and NF-κB p65 protein in VEC in LPS+XBJ group were significantly decreased (P<0.05 or P<0.01);the NO level and the expression levels of NF-κB p65 protein and iNOS protein in VEC in LPS+PDTC group were significantly decreased(P<0.05 or P<0.01).There were no significant differences of the NO levels and the expression levels of iNOS protein between LPS+XBJ group and LPS +PDTC group (P>0.05),but the expression level of NF-κB p65 protein in LPS+PDTC group was lower than that in LPS+XBJ group(P<0.05).Conclusion XBJ can inhibit the production of NO and the expression of iNOS protein in VEC;its mechanism may be related to inhibiting the activation of NF-κB to control inflammation.
4.Curcumin downregulation of MGMT expression to enhance the chemosensitivity of temozolomide on maligant glioblastoma
Xiaojun CAI ; Lijuan HAN ; Ping WEI
Journal of International Oncology 2016;43(8):565-569
Objective To explore the roles of curcumin in regulating high level O6-methylguanine-DNA methyltransferase (MGMT) expression and the chemosensitivity of gliomas cells to temozolomide (TMZ) in malignant gliomas.Methods The expressions of MGMT were detected in C6 and U87 cell lines and primary malignant gliomas cell by qRT-PCR.The cell proliferation was analyzed after added in signal curcumin,signal TMZ,curcumin combined with TMZ in cells by CCK-8 assay.The cell apoptosis rate was detected by flow cytometry.Results Compared with single curcumin (C6:0.64 ±0.03;U87:0.63 ±0.06;primary cell:0.51 ±0.07) and single TMZ (C6:0.53 ±0.06;U87:0.51 ±0.04;primary cell:0.79 ±0.03),curcumin combined with TMZ (C6:0.14 ±0.01;U87:0.12 ±0.03;primary cell:0.29 ±0.02) could significantly reduce the expression of MGMT in C6,U87 cell lines and primary cell line (C6:F=23.675,P=0.006;U87:F=29.021,P=0.001;primary cell:F=25.534,P=0.001).The combination of curcumin and TMZ could significantly inhibit the cells proliferation,decrease the halfinhibition concentration (IC5o) value (C6:F=6.731,P=0.012;U87:F=17.321,P=0.008;primary cell:F=18.857,P =0.007).The apoptosis rate of the cells was significantly increased after the combined action of curcumin and TMZ (C5:F=25.871,P=0.001;U87:F=6.847,P=0.009;primary cell:F=36.641,P=0.000).Conclusion Synergistic effect of curcumin and TMZ can reduce the expression of MGMT and increase the chemosensitivity of TMZ to malignant glioma,and provide new strategy and methods for the treatment of malignant glioma.
5.Clinical study of Alpha lipoic acid injection combined mecobalamin and prostaglandin E on treating patients with diabetic neuropathy
Lijuan CUI ; Yunhua YANG ; Yu HAN
Clinical Medicine of China 2014;30(4):398-401
Objective To investigate the clinical effect and safety of alpha lipoic acid injection combined mecobalamin and prostaglandin E on type 2 diabetic patients complicated with diabetic peripheral neuropathy(DPN).Methods One hundred and sixty type 2 diabetic patients complicated with DPN in the General Hospital of Benxi Iron and Steel Group Corporation from Jan.2011 to Dec.2012 were randomly divided into the treatment group(n =80) and the control group (n =80).Three cases of the treatment group and 5 cases of the control group discharged early from the study because of their own reasons.There were 77 cases in the treatment group and 75 cases in the control group.On the basis of controlling blood glucose,patients in the two groups were given 500 μg mecobalamin combined with intramuscular injection once two days,as well as prostaglandinE 10 μg injection once a day.Patients in treatment group were added with 600 mg alpha lipoic acid for intravenous injection once a day for 10-14 days.Total symptom score (TSS),nerve conduction velocity,satisfaction and adverse reactions were evaluated before and after treatment.Results TSS score,tingling score,burning sensation score and hypoesthesia score,numb score in treatment group were (3.5 ± 2.5),(1.1 ± 0.4),(0.9 ± 0.7),(1.3 ± 0.4),(1.3 ± 0.9),significantly lower than those in control group (4.3 ± 2.1,t =2.11,P <0.05;1.5 ±0.5,t =1.86,P<0.05;1.3 ±0.5,t =1.83,P <0.05;1.7 ±0.5,t =1.87,P <0.05; 1.9 ± 0.4,t =1.91,P < 0.05).The median nerve conduction velocity,peroneal nerve motor conduction velocity,median nerve sensory conduction velocity,common peroneal nerve sensory conduction velocity of patients in treatment group were (53.6 ± 1.4) m/s,(49.6 ± 1.1) m/s,(47.3 ± 1.1) m/s,(48.2 ± 1.9) m/s,lower than those in control group((48.5 ±2.7) m/s,t =-4.94,P <0.05;(43.9 ±2.1) m/s,t =-5.36,P <0.05; (41.6 ± 1.8) m/s,t =-5.09,P <0.05;(43.2 ±2.5) m/s,t =-4.27,P < 0.05,P <0.05).In the treatment group,97.4% (75/77) physicians and 92.2% (71/77) patients were satisfied with treatment effect,while in the control group,84.0% (63/75) physicians and 78.7% (59/75) patients were satisfied with treatment effect.During the study periods,there were 3 cases with facial flushing and 1 cases of dizziness in the treatment group,and 2 cases of facial flushing and 1 cases of dizziness in the control group.All adverse reactions were spontaneous remission without any special treatment.Conclusion Alpha lipoic acid intravenous drip is effective in term of treating type 2 diabetic peripheral neuropathy,and with high safety.
6.Detection and clinical significance of immune function in lung cancer patients
Xiaozhen CHENG ; Fucai HAN ; Jiexian JING ; Lijuan QIAO ; Cunzhi HAN
Cancer Research and Clinic 2007;19(z1):47-50
Objective To study the variety and significance of immune function in lung cancer patients.Methods 68 pretherapy lung cancer patients and 20 healthy volunteers with peripheral blood samples by flow cytometry.Results The proportion of CD+3T cells,CD+4T cells and the ratio of CD4/CD8 decreased in lung cancer patients,while the proportion of CD+8T cells and natural killer cells increased.Serum levels of TNF-α,IL-4,IL-6,IL-10 were significantly increased in patients compared with healthy controls,while the ratio of Th1/Th2 was decreased.(2)The natural killer cells level was negatively correlated with the CD3,CD4,CD8 levels respectively.The CD4 level was negatively correlated with the levels of IL-6,IL-10 respectively.(3)No statistically significant relationship was found between the peripheral blood lymphocyte,Th1-Th2 cytokines and pathological type,lymph node metastasis,distant metastasis.Conclusion Immune suppression was very common in lung cancer patients,particularly cell mediated immunity suppressed markedly.The proportion and function of CD+4T cells decreased significantly.which may resulted from the Th1,Th2 imbalance.Natural killer cells and CD+8T cells increased significantly,but could not prevent tumor development,which may resulted from these factors that suppress immune response in tumor microenvironment.
7.Application of 3D printing navigational template in puncturing of foramen rotundum for radiofrequency thermocoagulation to treat primary trigeminal neuralgia (V2)
Ying HAN ; Ran WANG ; Hongxiang NIU ; Lijuan LU
The Journal of Clinical Anesthesiology 2017;33(3):226-230
Objective To explore the effectiveness and precision of 3D printing navigational template in puncturing of foramen rotundum for radiofrequency thermocoagulation to treat primary trigeminal neuralgia (V2).Methods Forty-three patients (27 males,16 females,aged 45-85 years,ASA grade Ⅰ or Ⅱ) with primary trigeminal neuralgia (V2) were included and randomly divided into experimental group (group A,n=21) and control group (group B,n=22).After taking a CT scan and 3D reconstruction of each patient's skull,puncture simulations were carried out,then the final puncture schemes were decided.In group A,puncture was performed under guidance of navigational template but was conducted empirically in group B.In both groups,3D-CT image and electrical stimulation were used in all the procedures to confirm the location of point of needle before radiofrequency thermocoagulation.The cases of successful puncture in one-time,times of CT scanning,radiant quantity,operation time during the operation in both groups were recorded.Furthermore,NRS scores and complications including hypoesthesia,motor function degeneration,hematoma,absence of corneal reflex,cerebrospinal fluid leakage were recorded after procedure.Results The rate of successful puncture in one-time of group A was superior than that of group B (90.4% vs.22.7%).Compared with group B,CT scan times [(1.1±0.3) times vs.(2.8±1.3) times],radiant quantity [(323.1±108.7) mGy*cm vs.(787.8±355.7) mGy*cm],operation time [(15.3±5.5) min vs.(28.5±6.5) min] in group A were significantly reduced (P<0.05).NRS scores of both two groups were obviously reduced after surgery [group A: (3.1±1.7) scores vs.(8.5±0.7) scores;group B: (3.1±1.5)scores vs.(8.5±0.7) scores] (P<0.05),but the effectiveness in group A was not superior than group B.No serious complications occurred in all patients.Conclusion On the basis of sufficient preoperative planning of puncture approach,3D printing template can significantly enhance the effectiveness and precision of puncture of foramen rotundum,improving the efficiency and quality of radiofrequency treatment of primary trigeminal neuralgia (V2).
8.Assessment of patients discomfort and nursing care with the application of vector system in periodontal treatment
Liwen ZHOU ; Ping YANG ; Lijuan XIAO ; Qiong HAN ; Yongbo GAO
Chinese Journal of Practical Nursing 2014;30(21):46-48
Objective The study aimed to compare the vector system with the hand instrument in the pain severity during scaling and root planning.Methods 60 periodontal patients were randomly divided into two groups for supportive periodontal therapy (SPT):the experimental group (using vector system) and the control group (using gracey instruments),with 30 cases in each group.And the painfulness after SPT was evaluated by Visual Analogue Scale (VAS).Results 66% patients felt mild pain during the supportive periodontal therapy with the application of vector system,while 36% patients felt mild pain in the control group.24 patients in the experimental group accepted vector system for SPT and 23 patients in the experimental group felt less fear of the treatment.Conclusions Patients will feel less discomfort with the application of the vector system,therefore better compliance will be reached.And the cooperation of the doctors and nurses has great impact on the treatment effect.
9.Multiple organ parenchymal cell apoptosis and its induction early after ischemia-reperfusion in rats and mice
Lijuan JIN ; Weixin CHENG ; Xiaolin YIN ; Han YANG
Chinese Journal of Pathophysiology 2001;17(8):792-793
AIM: To determine the evolutionary pattern of parenchymal cell apoptosis in multiple organs early after intestinal ischemia-reperfusion(I/R) and its induction mechanisms and the role of apoptosis in triggering SIRS/MODS. METHODS: An I/R model was reproduced by clipping and releasing the superior mesenteric artery in rats and mice. Flow cytometry, electron microscope, DNA agarose gel electrophoresis, TUNEL method, fluorescent and Gomori's silver-HE staining were used to detect apoptosis. Distribution features of apoptotic parenchymal cells in multiple organs were observed. Immunohistochemical staining of HSP 70 and Bcl-2 were performd to study the induction mechanisms of apoptosis.RESULTS and CONCLUSION: 1. Damage of the liver, lung, gut and kidney was appeared in early phase of I/R. The percentages of apoptosis in parenchyma organs increased progressively. The percentages of cell necrosis increased with the prolonged I/R duration. 2. Percentages of apoptosis were much higher near the central veins of liver lobules, in the outer medulla of the kidney, and the antimescenteric border of intestinal mucosal epithelium because of ischemia. 3. The expression of HSP 70 increased and Bcl-2 reduced in the areas mentioned above because of hypoperfusion. 4. Apoptosis of I/R hepatocytes, splenocytes and thymocytes was obviously increased after Kupffer cell blockage with GdCl3, showing the functional state of Kupffer cells may play an important role in SIRS/MODS.
10.Nosocomial infection characteristics and control strategies of initial treatment acute leukemia patients
Xiujuan DONG ; Lijuan SUN ; Xueli JIAO ; Lijie HAN
Cancer Research and Clinic 2012;24(10):692-694
Objective To investigate the characteristics of co-infection in initial treatment acute leukemia induction chemotherapy.Methods The clinical features of 179 untreated acute leukemia patients with nosocomial infection were analyzed after combined chemotherapy.Results In the 179 patients,151cases achieved complete remission,the complete remission rate was 84.4 %,82 cases suffered from nosocomial infections,the incidence of infection was 45.8 %.The sites of infection were oral,anal,lung,as well as primary foci was not clear bacteremia.In 428 specimens,the isolated bacterial colony counted a total of 66,the number of fungal colonies was 9,the bacterial colony was G-bacteria-based.G-bacteria had different degrees of resistance to many antibiotics.Extended-spectrum β-lactamases strains had not been detected in these specimens.Conclusion Acute leukemia patients is easy to co-infection after chemotherapy.Control and prevention of nosocomial infections should run throughout the entire treatment process,application of laminar flow bed helps reduce the newly diagnosed acute leukemia patients with nosocomial infection incidence.