BACKGROUND: Gentamicin(GM) -induced ototoxicity relates to the permanent injury on the spinal ganglion cells, which are important to the process of hearing and communication.OBJECTIVE: To investigate the mechanism underlying antioxidant effect of baicalin(BA) on GM-treated mouse spinal ganglion cells (SCGs).DESIGN: Randomized controlled trial.SETTING and MATERIALS: The research was completed in the Guandong Medical College. Twenty Kunming mice of either gender( clean grade) weighing(15±2) g were provided by the Experimental Animal Center of Guangdong Medical College (certificate number: 2003A026). The mice were kept at the environment temperature of 28℃ with relative humidity of 70%.INTERVENTIONS: Twenty mice were randomly divided into control group , GM group(with GM treatment only), BA group(with BA treatment only)and GM + BA group(with GM combined with BA treatment). GM was administered in the GM and GM + BA groups via intraperitoneal injection at 100 mg/kg for 10 consecutive days, and BA was given in BA and GM + BA groups similarly at 100 mg/kg. In the control group, the mice Received saline injection in equivalent volume in the same manner.MAIN OUTCOME MEASURES: The activities of the antioxidative enzymes superoxide dismutase(T-SOD) and glutathione peroxidase(GSH-PX) were evaluated and the contents of lipid peroxidation substance malondialdehyde (MDA) measured with ultraviolet (UV) chromatography in SCGs in different treatments.RESULTS: BA could reverse the GM-induced low activities of T-SOD (from 46. 50 to 27.86 NU/mL, P ＜ 0. 01) and GSH-PX(from 83.77 to 42. 34 U,P ＜ 0. 01 ) , and limited the GM-induced high content of MDA(from 11.87 to 17.03 μmol/L, P ＜ 0.01) in SGC.CONCLUSION: BA produces neuroprotective effect on SGCs through eliminating superoxide radicals and inhibiting lipid peroxidation in the event of GM exposure.

AIM: To study the protective effect of baicalin (BA) against the ototoxicity of gentamicin (GM) of mice spinal ganglion (SG) cells. METHODS: MTT assay was employed to determine the growth inhibition of GM on the SG cells. The activities of superoxide dismutase (T-SOD) and glutathione peroxidase (GSH-PX), and the content of malondialdehyde (MDA) were measured by UV chromatography in SG cells from mice of different groups. RESULTS:Baicalin reversibly limited the GM-induced growth inhibition of SG cells in a dose-dependent manner. BA increased the activity of T-SOD and GM-induced decreased activity of T-SOD and GSH-PX in SG cells. The compound could also reduce MDA level and limite the GM-induced high content of MDA in SG cells. CONCLUSION: Baicalin mediated neuroprotective effect on SG cells is against gentamicin-induced ototoxicity through anti-oxidant.

Objective To analyze the function of cGMP-dependent protein kinase(PKG)in the survival of cultured rat cerebellar granule cells(CGC).Methods CGC culture was incubated for 24 h before addition of ethanol and different reagents,such as Deta-NONOate(a NO donor),Br-cGMP and Rp-8-pCPT-cGMPS(a cGMP-dependent protein kinase inhibitor).After the treatment,samples were incubated for another 24 h,then the cells were collected and counted by using hemocytometer.Results Deta-NONOate and Br-cGMP enhanced the cell survival in the absence of ethanol,indicating their neurotrophic effects.They showed neuroprotective effect on the cultured CGC since they could reduce the ethanol-induced cell death.Inhibiting PKG with Rp-8-pCPT-cGMPS could eliminate both neurotrophic and neuroprotective effects mediated by Deta-NONOate and Br-cGMP.Conclusion cGMP-dependent protein kinase plays a key role in the cultured CGC survival and protects the cells against ethanol neurotoxicity.

Objective To discuss the endothelial cell which was modified by exogenous anticoagulant genes contribute to the increase of antithrombosis activity of lined vascular prosthesis and the influence to other physiological functions of endothelial cells. Methods This summarized paper was made on literature review of recent years.Results The transfection of genes, including plasminogen activator (t-PA, u-PA, Urokinase), thrombomoduline (TM) and hirudin, etc, to endothelial cells resulted in not only the increase of antithrombosis activity of local vascular, but also the decrease of endothelial cell function in adherence and proliferation.Conclusion The increase of antithrombosis activity of lined vascular prosthesis has been done by exogenous genes. However, this technique ought to be studied, intensively.

DNA, Mitochondrial ; genetics ; Deafness ; chemically induced ; genetics ; Haplotypes ; Humans ; Mutation

Objective To investigate the influence of anti-depression therapy on inflammatory cytokines and quality of life(QOL) in patients with acute coronary syndrome(ACS) complicating depression.Methods Ninety-four patients with ACS complicating depression(HAMD total score ≥8) were randomly divided into the treatment group and control group,47 cases in each group.The control group was given the conventional drug therapy,pantoprazole 40 mg /d,on this basis the treatment group was given sertraline 50 mg/d.The treatment course in the two groups was 6 months.The change of HAMD score,inflammatory cytokines,QOL and incidence of adverse cardiovascular events were observed and compared between the two groups.Results The HAMD score after 3-,6-month treatment in the treatment group was significantly lower than that in the control group (P<0.05).The levels of inflammatory cytokines after treatment in the two groups were all reduced,while the IL-6 and TNF-α levels in the treatment group were lower than those in the control group (P<0.05);the scores of all dimensions and total scores of SAQ after 6-month treatment in the treatment group were significantly improved,and the anginal attack situation,treatment satisfaction degree and total score were significantly higher than those in the control group (P<0.05).During 12-month follow-up,the incidence rate of major and minor cardiovascular events,alimentary tract hemorrhage events and total events had no statistical difference between the two groups(P>0.05).Conclusion The antidepressant therapy is safe and effective for treating ACS patients,can effectively improve the depression emotion,inhibits inflammatory reaction,relieves somatic symptoms,and improves QOL.

AIM: To provide experimental evidence for gene therapy of thrombophilia disease, we constructed the eukaryotic expression plasmid with human thrombomodulin (hTM) gene and observed the alteration of hTM expression on the surface of human umbilical vein endothelial cells (HUVECs) with and without the reconstructive plasmid. METHODS: The whole expressive fragment of hTM gene was amplified by PCR from human genome. Both hTM gene and pcDNA3.1(+)/neo empty vector was digested by HindⅢ and EcoRⅠ. Two digested fragments were ligated into pcDNA3.1/hTM with T_4DNA ligase. After identifying, the reconstructive plasmid transfected into HUVECs using lipofectin. The hTM antigen on the HUVECs was detected by immunohistochemistry. RESULTS: The hTM reconstructive plasmid was confirmed by double endonuclease redigesting and sequencing. About 10% HUVECs were transfected by pcDNA3.1/hTM plasmid with lipofectin and the high-level hTM was detected on the transfected cells. CONCLUSION: We constructed the pcDNA3.1/hTM plasmid successfully, and it could be expressed on the HUVECs. [

Objective: To establish the specific chromatogram of Yinhuang Drop Pills (YDP) by High performance liquid chromatography. Methods: The chromatographic column Kromasil 100-5C18 (250 mm × 4.6 mm, 5 μm) was used, acetonitrile-0.4% phosphoric acid as mobile phase with gradient elution, and the detection wavelength was 372 nm. Through similarity evaluation software, the similarity of specific chromatogram of 10 batches YDP were calculated. Results: The HPLC specific chromatogram of YDP showed 7 common peaks, of which 6 peaks (neochlorogenic acid, chlorogenic acid, cryptochlorogenic acid, 3,4-O-dicaffeoylquinic acid, 3,5-O-dicaffeoylquinic acid, and 4,5-O-dicaffeoylquinic acid) from Lonicerae Flos, 1 common peaks (baicalin) from Scutellariae Radix; By comparing with the reference substances, identified 7 components, respectively, the neochlorogenic acid (peak 1), chlorogenic acid (peak 2), cryptochlorogenic acid (peak 3), 3,4-O-dicaffeoylquinic acid (peak 4), 3,5-O-dicaffeoylquinic acid (peak 5), 4,5-O-dicaffeoylquinic acid (peak 6), baicalin (peak 7). By the methodology validation, verified that this method has good precision, repeatability and stability, 10 batches of sample similarity is greater than 0.9. Conclusion: This method was available for the quality control of YDP.

OBJECTIVETo study the expression and associations of three survivin splicing variants in gastric cancer and normal gastric mucosa, and to evaluate the prognostic significance.

METHODSReal time quantitative RT-PCR was used to detect the expression of three survivin splicing variants in tumor and matched normal gastric mucosa specimens from 77 cases with gastric cancer.

RESULTSThe expression of three survivin splicing variants than upregulated significantly in gastric cancer than those in normal mucosas (P< 0.01). In cancer tissues, the expression rates of survivin, survivin-2B, survivin-deltaEx3 were 100%, 79.8% (61/77), 64.9% (50/77) respectively. The survival rate was significantly lower in the patients with high survivin expression than those with low survivin expression (P< 0.01).

CONCLUSIONAmong three survivin splicing variants, the expression level of wild-type survivin mRNA is an important predictor for prognosis.

Adult ; Aged ; Aged, 80 and over ; Biomarkers ; Female ; Follow-Up Studies ; Gastric Mucosa ; pathology ; Humans ; Inhibitor of Apoptosis Proteins ; Male ; Microtubule-Associated Proteins ; genetics ; Middle Aged ; Neoplasm Proteins ; genetics ; Neoplasm Staging ; Prognosis ; Protein Isoforms ; genetics ; RNA, Messenger ; genetics ; Reverse Transcriptase Polymerase Chain Reaction ; Stomach Neoplasms ; genetics ; pathology ; Transcription, Genetic

OBJECTIVETo further investigate the flavonoids of Rhododendron anthopogonoide.

METHODThe compounds were isolated and purified by Sephadex LH-20, polyamide and silica gel column chromatography. Their chemical structures were elucidated on the basis of physicochemical properties and spectral data.

RESULTSix compounds were isolated and identified as: taxifolin (I), guaijaverin (II), reynoutrin (III), quercitrin (IV), polystachoside (V) and quercetin-4'-O-beta-D-galactoside (VI).

CONCLUSIONFor the first time, compound VI was separated from Ericaceae plant, compounds II and V were isolated from Rhododendron plant, and compounds I and II were obtained from this plant.

Flavonoids ; chemistry ; isolation & purification ; Flavonols ; chemistry ; isolation & purification ; Galactosides ; chemistry ; isolation & purification ; Plant Leaves ; chemistry ; Plant Stems ; chemistry ; Plants, Medicinal ; chemistry ; Quercetin ; analogs & derivatives ; chemistry ; isolation & purification ; Rhododendron ; chemistry