Objective To study the expression of iNOS and AChE during streptomycin ototoxicity and the correlation.Methods 16 guinea pigs were divided into 2 groups randomly:control group and SM group.SABC immunohistochemical staining and image quantitative analysis technique were used to observe the expression of iNOS and AChE and grey value analysis.ABR measurements were used to monitor the effects of ototoxity.Results After 10 days with drugs,the ABR threshold value of SM group increased more significantly than that of the control group(P

Aim To examine the apoptosis and bFGF expression on the cochlea of guinea pig after administrated streptomycin(SM) and the antagonism of Salvia Miltiorrhiza Injection(DS) on SM ototoxity.Methods Forty guinea pigs were divided into four groups,and treated with DS and SM respectively.The apoptosis and bFGF expression were examined by TdT mediated biotin dUTP nickend labeling(TUNEL) techniques and SABC immunohistochemical staining with paraffin slide.The intensity of images were stored in a computer and analyzed by the image quantitative analysis technique.Auditory brainstem response(ABR) measurement was used to detect the ototoxicity before/after the examination.Results After 10 d treated by drugs,the ABR threshold of SM increased significantly,while the DS+SM reduced more(P

Objective To observe the effect of tetraethylplyrazine(TMP) on outward K~+ channel of outer hair cells in guinea pig cochlea.Methods 60 guinea pigs were divided into 6 groups randomly in the experiment.Auditory brainstem response was used to monitor the change of ABR thresholds and patch clamp techniques to observe the effect of TMP on outward K~+ channel.Results TMP decreased the elevated ABR threshold caused by streptomycin. The TMP increased the amplitudes of calcium sensitive potassium channels (I_ K(Ca) ) and delayed outward potassium channels (IK) of outer hair cells of guinea pig cochlea.Conclusion The study indicates that TMP may act as a protective agent against ototoxicity of streptomycin. The amplitudes of I_ K(Ca) and IK of outer hair cells are increased by the TMP,suggesting the possible mechanisms of reducing ototoxicity.

A novel flow injection chemiluminescence (CL) method for the determination of loxoprofen and naproxen was proposed based on the CL system of KMnO4 and Na2 SO3 in acid media.The CL intensity of KMnO4-Na2 SO3 was greatly enhanced in the presence of loxoprofen and naproxen.The mechanism of the CL reaction was studied by the kinetic process and UV-vis absorption and the conditions were optimized.Under optimized conditions,the CL intensity was linear with loxoprofen and naproxen concentration in the range of 7.0 × 10- 8 - 1.0 × 10 5 g/mL and 2.0 × 10 7 - 4.0 × 10 6 g/mL with the detection limit of 2.0 × 10 8g/mL and 3.0 × 10 sg/mL (S/N =3),respectively.The relative standard deviations were 2.39％ and 1.37％ for 5.0 × 10- 7 g/mL naproxen and 5.0 × 10 7 g/mL loxoprofen ( n =10),respectively.The proposed method was satisfactorily applied to the determination of loxoprofen and naproxen in pharmaceutical preparations.

A novel flow injection chemiluminescence（CL）method for the determination of loxoprofen and naproxen was proposed based on the CL system of KMnO4 and Na2SO3 in acid media.The CL intensity of KMnO4-Na2SO3 was greatly enhanced in the presence of loxoprofen and naproxen.The mechanism of the CL reaction was studied by the kinetic process and UV-vis absorption and the conditions were optimized.Under optimized conditions,the CL intensity was linear with loxoprofen and naproxen concentration in the range of 7.0×10^-8-1.0×10^-5g/mL and 2.0×10^-7-4.0×10^-6g/mL with the detection limit of 2.0×10-8g/mL and 3.0×10-8g/mL（S/N=3）,respectively.The relative standard deviations were 2.39% and 1.37% for 5.0×10^-7g/mL naproxen and 5.0×10^-7g/mL loxoprofen（n=10）,respectively.The proposed method was satisfactorily applied to the determination of loxoprofen and naproxen in pharmaceutical preparations.

Objective To investigate the expression of inducible nitric oxide synthase(iNOS) in the cochlear stria vascularis(SV) of guinea pigs after streptomycin(SM).Methods Auditory brainstem response(ABR) was used as measurement index,and combining with transmission electron microscope(TEM),immunohistochemical staining and image quantitative analysis technique, to detect iNOS expression in the cochlea stria vascularis of guinea pigs and the change of morphology after SM.Results 10 days after adminitration, ABR threshold of SM group increased more significantly than that of the control group(P

Objective To provide a better reference for the quality control of Nujin Pian by establishing the method for the determination of paeonol in Nujin Pian by HPLC. Methods HPLC was used Agilent XDB C18 column (4.6 mm×150 mm, 4.6 μm), mobile phase was composed of methanol-water (45∶55). The flow rate was 1.0 mL/min with detection wavelength at 274 nm and column temperature at 40 ℃. Results The regression equation of paeonol was Y=7×107X-16 965, r 2=0.999 8 (n=6). The linear range of paeonol was 0.003 8-0.38 μg. The average recovery rate was 99.7%, and RSD was 1.56% (n=6). Conclusion The method is simple, fast and accurate with good reproducibility. It can provide reference for the quality control of Nujin Pian.

Objective To monitor the blood glucose concentration, and then provide the scientific evidence of diagnosis and treatment for burn patients in time. Methods Using the same glucose meter to monitor the intravenous glucose and the peripheral glucose respectively for the same patient in the same time, and then compared the difference of them. The blood glucose samples were taken from 71 burn patients and 50 outpatients. Results There were significant difference between the intravenous glucose and the peripheral glucose, P

Objective To analyze the chromosome karyotypes,prenatal diagnosis indications and pregnancy outcomes of high-risk pregnant women in Guangzhou.Methods 2 475 cases pregnant women with screening high risk were operated amniocen-tesis or cordocentesis from January 2010 to September 2012,then amniotic fluids and cord bloods were cultured and the cell were collected for chromosome preparation,G banding,karyotype analysis.We completed follow-up works lastly.Results 38 cases were detected chromosomal abnormality(including 12 cases Down′s syndrome,9 cases sex chromosome abnormality,7 cases transloca-tion,5 cases Edwards′syndrome,2 cases inversion,2 cases deletion,1 cases triploid),the abnormal rate was 1.54%.132 cases were detected chromosomal polymorphism(60 cases 1,9,16qh+ ,30 cases inv(9),25 cases D/Gs+ ,17 cases Y polymorphism).Research on prenatal diagnosis indications,there were 449 cases advanced age,668 cases Down′s screening with high risk,158 cases with ab-normal B ultrasound screening,38 cases with adverse pregnancy history.Conclusion The highest percentage abnormal karyotype is Down′s syndrome.Down′s screening high risk is the main reason for prenatal diagnosis.It is very important to do prenatal diagnos-tic and system B ultrasound for the high-risk pregnant women.

BACKGROUND:Studies have found that liver cels can synthesize insulin after giving pancreatic and duodenal homeobox 1 (PDX1) gene. Anti-CD20 monoclonal antibody can inhibit the immune reaction of insulin-producing liver cels, but the mechanism is unclear. OBJECTIVE:To observe the influence of interleukin-10 gene on liver cels and liver PDX1 expression in nonobese diabetic mice after interfered by adenovirus vector-mediated murine interleukin-10 and anti-CD20 monoclonal antibody. METHOD:Forty nonobese diabetic female mice aged 3-5 weeks were randomly divided into anti-CD20, anti-CD20 + interleukin-10, interleukin, and control groups. Mice in each group were respectively injected with anti-CD20 monoclonal antibody, anti-CD20 monoclonal antibody + adenovirus vector-mediated murine interleukin-10, adenovirus vector-mediated murine interleukin-10 and normal saline on days 1, 8, 15 and 21via tail vein. RESULTS AND CONCLUSION:At 12 weeks, the blood glucose level of mice treated with anti-CD20 monoclonal antibody and/or interleukin-10 was significantly reduced compared with the control group, while the insulin, interleukin-10 and CD20 expression levels in the serum and liver were significantly increased, the liver PDX1 expression was also upregulated. Anti-CD20 monoclonal antibody with interleukin-10 had more obvious effects than the single use. No matter the combined intervention or single use, anti-CD20 monoclonal antibody and interleukin-10 show no impact on the inflammation of liver cels. Anti-CD20 monoclonal antibody and/or interleukin-10 increases PDX1 expression in nonobese diabetic mice.