Objective To inject PPTA into the cochlea of guinea pigs through scala tympani fenestration ,to study the protective effect of PPTA injection on the cochlear damage induced by gentamicin and mechanism of oxy-gen free radical .Methods Randomly divided were the guinea pigs with normal hearing into three groups :the con-trol group ,GM group and PPTA group .We injected the artificial perilymph 10μl /d into cochlea through scala tym-pani fenestration on control group for 3 days ,injected GM 160 mg · kg -1 · d-1 on GM group for 3 days ,injected the PPTA 10 μl /d into the cochlea through scala tympani fenestration and injected GM 160 mg · kg -1 · d-1 at the same time on PPTA group for 3 days .We tested ABR and analyzed the hearing changes .We tested the OFR level reacted by SOD and GSH of the cochlea tissue .SEM and TEM were performed to observe the change of cell mor-phology .Results For ABR ,the control group was 12 .75 ± 3 .796 ,GM group 28 .230 ± 4 .953 ,PPTA group23 .47 ±9 .211 dB SPL(P<0 .05) .For SOD ,the normal group was 50 .241 ± 9 .080 ,GM group 28 .230 ± 4 .953 ,PPTA group 43 .089 ± 4 .587 U/mgprot(P<0 .05) .For GSH ,the normal group was 3 .03 ± 0 .33 ,GM group 1 .51 ± 0 .13 ,PP-TA group 2 .50 ± 0 .16 Ggsh/L(P<0 .05) .The changes of hair cells of PPTA group were obviously less severe than that of GM group .For TEM ,the changes of spiral ganglion and stria vascularis of PPTA group were obviously less severe than that of GM group .Conclusion Injecting PPTA through scala tympani fenestration can protect cochlea by generating the excess of OFR when confronting against GM .

Objective To study the protective effect of peperphentonamine hydrochloride (PPTA) on the cochlea afferent nerve system damage induced by gentamicin (GM) of guinea pigs. Methods Thirty-six health guinea pigs were randomly divided into three groups:the normal group with saline; GM group with muscle injection of GM [100 mg/(kg·d),14 d] and PPTA group with peritoneal injection of PPTA [10 mg/(kg·d),14 d] on the ABR was analyzed , and the expression of Caspase-3 was tested by Western blot. TUNEL (after coloration)was performed to observe the apoptotic index,and its morphological changes were observed by TEM. Results After trial, the threshold of control group, GM group, PPTA group were 14.58 ± 1.16, 65.95 ± 1.17, 36.13 ± 1.17;the apoptosis index: 1.09 ± 0.14, 23.17 ± 0.88, 8.84 ± 0.49; the Caspase-3:1.09 ± 0.11, 2.55 ± 0.20, 1.67 ± 0.07. There were significantly difference among three groups (P<0.05). Morphological changes: cells apoptosis and the synapase were damaged seriously in GM group; the injury was less serious in PPTA group. Conclusion PPTA plays a protective role on GM-induced cochlea afferent nerve system damage of guinea pigs.

Objective To analyze the disease spectrum of abdominal external hernia during medical selection of flying cadets and compare the medical standards between US Air Force and Chinese PLA Air Force in order to improve the system of medical selection.Methods The data about abdominal external hernia among flying cadets during Chinese PLAAF medical selection between 2012 and 2015 were retrospectively analyzed and compared with the medical standards of the USAF flying cadets.Results Twenty-nine candidates were eliminated because of hernia,including 4 cases of hiatal hernia,3 cases of umbilical hernia and 22 cases of inguinal hernia.4.70% of the candidates were eliminated because of hernia disease.Empirical research showed difference in hernia standards between China and the USA.Conclusion Compared with Chinese medical selection standards,the USAF standards give more weight to whether the symptoms of disease impact air safety and efficiency.Our medical selection standards need to be improved by learning from foreign practices.

A nicotine-degrading bacterial strain Z7 was isolated from tobacco growing soil at Zhangjiajie region in Hunan Province.The morphology,physiological and biochemical characteristics of strain Z7 were studied and the results showed that characteristics of this strain were essentially consistent with Agrobacterium radiobacter/tumefaciens.This strain degraded nicotine optimally at 30℃ and initial pH 7.0.It was able to utilize nicotine as its sole carbon source,and it could degrade 71% of nicotine under the optimized incubation conditions for 48 h.Meanwhile,the color of culture medium turned from yellowy to green and dark green,then it turned to brown.This strain might have potential applications in tobacco industry.

Objective To analyze the clinical characteristics ,treatment and outcome of Ebola virus disease so as to provide early clinical recognition and treatment for this disease .Methods The clinical manifestations and treatment of 5 cases of Ebola virus disease in Ebola Holding Center of Sierra‐Leone China Friendship Hospital from 15 March 2015 to 15 May 2015 were retrospectively analyzed .And the clinical characteristics and possible effective treatment were discussed combined with related literature . Results Five patients were diagnosed with Ebola virus disease by polymerase chain reaction and 4 cases of 5 patients had confirmed contact history ,while 1 case had no clear contact history .All the 5 cases presented with low fever ,headache and joint pain .Three cases then progressed into severe gastrointestinal symptoms such as nausea ,vomiting ,diarrhea and hypovolemic shock .The patients presented with fast heart rate and shortness of breath and other inflammatory response syndrome in acute phase .One patient rapidly progressed to liver pain ,jaundice and anuria ,then died .Three severe cases recovered after treated with fluid resuscitation ,circulation maintenance and electrolyte balance in acute phase .Conclusions The early symptoms of Ebola virus disease are low fever ,joint pain and nausea .Frequent vomiting ,diarrhea , low blood pressure and electrolyte disorder indicate severe conditions .Shock and electrolyte disorder are deadly complications .Early recognition ,diagnosis and treatment are the key to improve the prognosis .

Objective To investigate whether the left ventricular delayed contraction site determined by tissue Doppler imaging might be an optimal left ventricular lead position for improved outcomes of cardiac resynchronization therapy (CRT) in patients with non-ischemic cardiomyopathy. Methods Thirty-three patients subjected to CRT were selected, and all were performed conventional ultrasound cardiography and tissue Doppler examinations before operation. The left ventricular delayed contraction site was determined according to the interval between the onset of QRS and the peak systolic velocity. Retrograde coronary venography was performed during operation, and the left ventricular lead site was selected according to the left ventricular delayed contraction site determined by tissue Doppler examination before operation. The coronary sinus lead site was determined under the guidance of X ray of dorsaventral, lateral, right anterior oblique and left anterior oblique positions. Patients were divided into group A(n=20, the left ventricular lead site was in line with the delayed contraction site) and group B (n=13, the left ventricular lead site was not in line with the delayed contraction site). Results There was no significant difference in age, NYHA grading, left ventricular end-systolic volume(LVESV), left ventricular ejection fraction(LVEF), pulmonary arterial systolic pressure, QRS width and Ts-SD between the two groups before operation(P> 0.05). Six months after CRT, there was no significant difference in NYHA grading, LVESV and mitral regurgitation(MR) grading between the two groups(P>0.05), while the increase in LVEF and decrease in LVESV of group A were more significant than those of group B (P<0.01). Conclusion In patients with non-ischemic cardiomyopathy, CRT significantly improves left ventricular performance, and the more favourable outcomes are achieved in those pace at the delayed contraction site. Tissue Doppler imaging may help to guide the implant of left ventricular lead.

OBJECTIVETo observe the correlation between constitution of yin deficiency syndrome (YDS) and polymorphism of HLA-DQA1/treatment response of Peg-lFNalpha therapy in HBeAg positive chronic hepatitis B (CHB) patients, and to explore constitution of Chinese medicine (CM) in response of interferon therapy.

METHODSTotally 120 HBeAg positive CHB patients who were treated with Peg-IFNalpha were enrolled, and assigned to YDS group (59 cases) and non-YDS group (61 cases) according to classification of CM constitutions. All patients were subcutaneously injected with Peg-IFNalpha-2b (1.0 microg/kg body weight) or Peg-IFNalpha-2a (180 microg), once per week. Effective efficacy was primarily judged when complete response (CR) or partial response (PR) was obtained at month 6. Those with CR or PR completed 1 year therapeutic course. HLA-DQA1 gene types were detected by polymerase chain reaction sequence specific primers (PCR-SSP). The distribution difference of CM constitutions in patients with CR or PR and their inter-group HLA-DQA1 allele frequency were compared.

RESULTSDifferent treatment responses of Peg-IFNalpha were observed in CHB patients of two different CM constitutions. The ratio of CR + PR was 61.0% (36/59) in YDS group, obviously lower than that in NYDS group [78.7% (48/61), P < 0. 05]. Patients with CR had a lower allele frequency of HLA-DQA1 * 0501 than those with no-response [14.8% (8/54) vs. 30.6% (22/72)] with statistical difference (P < 0.05). Patients with CR had a higher allele frequency of HLA-DQA1 * 0601 than those with no-response [18.5% (10/54) vs. 5.6% (4/72)] with statistical difference (P < 0.05). The allele frequency of HLA-DQA1 * 0301 was lower in YDS group than in non-YDS group [2. 5% (3/118) vs. 9.8% (12/122)] with statistical difference (P < 0.05). The allele frequency of HLA-DQA1 * 0501 was higher in YDS group than in non-YDS group [33.9% (40/118) vs. 18.9% (23/122)] with statistical difference (P < 0.05). Yet statistical significance was lost after adjustment (Pc > 0.05 for both).

CONCLUSIONSBoth constitutions of CM and HLA-DQA1 gene polymorphism af- fect HBeAg positive CHB patients' response to Peg-INFalpha. Constitutions of YDS and HLA-DQA1 * 0501 was not favorable to response, their association needed to be further studied.

Antiviral Agents ; therapeutic use ; Gene Frequency ; HLA-DQ alpha-Chains ; genetics ; Hepatitis B e Antigens ; blood ; Hepatitis B, Chronic ; drug therapy ; genetics ; Humans ; Interferon-alpha ; therapeutic use ; Medicine, Chinese Traditional ; Polyethylene Glycols ; therapeutic use ; Polymorphism, Genetic ; Recombinant Proteins ; therapeutic use ; Remission Induction ; Yin Deficiency ; genetics

Objective To summarize the experience of minimally invasive treatment in upper ureteral calculi complicated with urinary tract infection.Methods Retrospectively analyzed the clinical data of 40 cases with upper ureteral calculi complicated with urinary tract infection who were treated from December 2009 to December 2013.Results Twenty-one cases were performed with retrograde catheterization at cystoscopy and 11 cases were performed with percutaneous nephrostomy directed by B-ultrasound in the stage Ⅰ,the infection were controlled after operation 2-6 d.These patients were successfully cured by extracorporeal shock-wave lithotripsy (ESWL),ureterorenoscope lithotripsy (URL) or percutaneous nephrolithotomy (PCNL) in the stage Ⅱ].The remaining 8 cases were successfully cured by URL with antiinfection therapy in the stage Ⅰ.All patients had no ureteral perforation,laceration,urine derived sepsis and severe bleeding complications.All of ureteral calculi were drained after 2-10 weeks.The average hospital stay was 13.4 d.Patients were followed up for 1-12 months after the stone expulsion,the average was 6 months.There was 3 patients who with preoperative renal dysfunction had been improved after URL,and other patients' renal function returned to normal.Conclusions The therapy of retrograde catheterization at cystoscopy and percutaneous nephrostomy directed by B-ultrasound in the stage Ⅰ,combined with ESWL,URL or PCNL in the stage Ⅱ in treating upper ureteral calculi complicated with urinary tract infection have more advantage such as less complication,rapid control of infection and complete removal of stones.It is an ideal method.

Objective To investigate ideal solution of neoadjuvant hormomal therapy (NHT) for locally advanced prostate cancer.Methods 60 patients diagnosed with locally advanced (T3-4N0M0) prostate cancer were treated with NHT.They were randomly divided into 3 groups of 20 cases.A group:NHT 2 weeks,B group:NHT 3 months,C group:NHT 6 months.Results The median PSA of A,B and C group after NHT were 24.88 (6.62-55.86),0.20 (0.05-12.07) and 0.07 (0.01-2.01) ng/ml,respectively.There was statistically significance compared with those in untreatment ( all P =0.00).There was statistically significant (P =0.00)among groups.The prostate volume of A,B and C group were (49.50+14.19),(47.35±17.99) and (36.15±7.17)ml,respectively.There was statistically significance in the B and C group compared with that in untreatment (P =0.04,0.00).There was statistically significant between A and C group and between B and C group (P =0.00,0.01).The Qmax of A,B and C group were (8.75±2.15),(11.7±2.81) and (14.45±2.61) ml/s,respectively.There was statistically significance in the B and C group compared with untreatment (both P =0.00).There was statistically significance among groups (all P =0.00).Conclusion The NHT time should last at least 3 months in order to reduce PSA and prostate volume and to increase the Qmax.

Objective To investigate the spatial learning and memory ability,the changes of indicators of oxidative stress,and their relationship in transgenic APP/PS1 mouse model of Alzheimer's disease(APP/PS1 mice). Methods The spatial learning and memory ability were assessed by Morris water maze test,and the activity or content of SOD, GSH-PX, MDA, and protein carbonyl in brain tissues were measured by ELISA in the APP/PS1 and wild type (WT) mice. Furthermore, the relationship between the learning and memory performances and the indicators of oxidative stress was examined. Results No significant difference in the spatial learning was observed between the APP/PS1 and WT mice (P ＜0. 05). The spatial memory which was measured as the percentage of time traveling in the targeted quadrant to the total traveling time was significantlydeclined in the APP/PS1 mice(29. 02 ± 4. 27) % as compared with the WT mice(47. 39 ± 6. 01) %(t =0. 000 ,P ＜0. 05). The percentage of length of traveling in the targeted quadrant to the total length traveled was significantly lower in the APP/PS1 mice(28. 85 ±3.77)% compared with the WT mice(46. 70 ±5.60)% (t =0. 000,P ＜0. 05). These findings indicated that the spatial learning and memory ability of APP/PS1 mice was significantly decreased compared to WT mice. There was no significant difference in activity or content of SOD,GSH-PX,and MDA in brain tissues between the APP/PS1 and WT mice (P ＜ 0. 05), while the content of protein carbonyl was significantly elevated in the APP/PS1 mice (2. 67 ±0. 19) than in the WT mice (2. 38 ±0. 15)(t = 0. 008, P ＜ 0. 05). Correlation analysis revealed that the elevated protein carbonyl was negatively correlated with the percentage of length traveled in the targeted quadrant(r = - 0. 639, P ＜ 0. 05) and the percentage of time traveled in the targeted quadrant(r = - 0. 636 ,P ＜ 0. 05). Conclusion The spatial memory impairment was negatively correlated with the elevated protein carbonyl in the APP/PS1 mice, suggesting that protein carbonylation caused by oxidative stress might play an important role in the development of memory impairment in the early stage of Alzheimer's disease.