OBJECTIVE To study the drug resistance,drug-resistant genes and disinfectant-resistant genes of clinical MRSA isolates.METHODS The sensitivity to penicillin and other 15 antibacterial agents was detected in 56 strains of MRSA by K-B paper disk diffusion.The mecA gene of the ?-lactamase and disinfectant-resistant genes qac(A/B)were detected by PCR.RESULTS All of the 56 strains of MRSA were sensitive to vancomycin and teicoplanin.Drug resistant rate of sulfamethoxzole/trimethoprim,nitrofurantoin,rifampin,tetracycline,levofloxacin,clindamycin and azithromycin were 17.9%,23.2%,82.1%,87.5%,89.3%,92.9% and 96.4%,respectively.All of the 56 strains were resistant to erythromycin,gentamicin,amikacin,penicillin,ampicillin/sulbactam,cefoxitin and ampicillin.In all 56 strains of MRSA,54(96.4%)MRSA isolates were mecA positive and 31(55.4%)MRSA isolates were qac(A/B)positive.CONCLUSIONS Clinically isolated MRSAs is multi-drug-resistant and the qac(A/B)positive rate is very high.

Objective To determine the content of L-carnitine injection with HPLC method. Methods Content L-carritine was measured by Diamonsil C18 (200 mm × 4.6 mm,5 μm) column,heptane sodium-phosphate Results L-carnitine in the range of 200-2000 ng had a good linear relationship (r=0.9998),the average recovery rate was 97.88%,RSD 1.07%. Conclusion This method was rapid,accurate,and can be used for determination of Lcarnitine by HPLC.

ObjectiveTo investigate the efficacy and safety of intratympanic methylprednisolone perfusion treatment of refractory sudden deafness.MethodsSixty-eight cases of refractory sudden deafness were recruited and divided by random digits table method into intratympanic-treatment group(34 cases)treating with intratympanic methylprednisolone perfusion and control group (34 cases)accepting methylprednisolone intravenous infusion treatment.The curative effect,adverse reaction of two groups were compared and the factors that effected intratympanic perfusion treatment were analyzed.ResultsEight cases of intratympanic-treatment group were cured,twelve cases were markedly effective,nine cases were effective and five cases were ineffective; while seven cases of control group were cured,five were markedly effective,seven were effective and fifteen were ineffective.The total efficiency of intratympanic-treatment group compared with that of control group showed significant difference[ 85.3％(29/34) vs.55.9％ (19/34),P ＜ 0.01 ].Improvement value of impaired frequency examined by pure tone audiometry(PTA) of intratympanic-treatment group was higher than that of control group [ ( 18.0 ± 16.2) dB vs.(8.2 ± 9.8) dB,P ＜ 0.05 ].In intratympanic-treatment group,improvement value of impaired frequency of patients whose age was lower than 50 and disease course was shorter than one month was higher than that of patients whose age was higher than 50 and disease course was longer than one month(P ＜ 0.01 ).The complication rate of intratympanic-treatment group was 8.8％(3/34),and no case had complications such as further decline in hearing.ConclusionThe intratympanic methylprednisolone perfusion treatment is safe and effective for refractory sudden deafness,and deserves further improvement and widely promotion.

ObjectiveTo evaluate the expression of interleukin-6 (IL-6) and interleukin-17 (IL-17) in patients with chronic rhinosinusitis (CRS),and analyze the effects of IL-6 and IL-17 on the occurrence and development of CRS.MethodsSelected 200 CRS patients who planned to receive operation treatment,including 36 cases with type Ⅰ,139 cases with type Ⅱ and 25 cases with type Ⅲ,and they were chosen as CRS group and divided into nasal polyps group ( 109 cases) who had nasal polyps and no nasal polyps group (91 cases) who didn't have nasal polyps.And 50 healthy subjects were chosen as control group.The plasma IL-6 and IL-17 concentration were detected by double-antibody sandwich ELISA method.ResultsThe plasma IL-6 and IL-17 levels of CRS group were (13.23 ±5.94),(9.24 ±4.15) ng/L respectively,significantly higher than those of control group[ (2.26 ± 1.01 ),( 1.58 ± 0.71 ) ng/L] (P ＜ 0.05 ),there was no significant difference between nasal polyps group and no nasal polyps group (P ＞ 0.05 ).The plasma IL-6 levels in type Ⅰ, Ⅱ and Ⅲ were(4.54 ±2.04),(12.90 ±5.80),(27.42 ± 12.32) ng/L respectively,and IL-17 levels were (3.17 ± 1.42),(9.01 ± 4.05),( 19.15 ± 8.61 ) ng/L,there were statistical differences among different clinical types (P ＜ 0.05).The plasma IL-6 and IL-17 level of CRS patients had significantly positive correlation (r =0.519,P ＜ 0.05).ConclusionsThe IL-6 and IL-17 expression are closely relatcd to the occurrence and development of CRS.

ObjectiveTo investigate the clinical therapeutic effect of limited internal fixation combined with external fixator in treatment of C-type distal radius fractures. MethodsFrom September 2008 to September 2010, 25 patients with C-type distal radius fractures treated by limited internal fixation combined with external fixator. Moreover, these patients were followed up after discharge. ResultsAll patients were followed up for 3-20 ( 12.6 ±4.7) months,and didn't have severe complications, such as pin tract infection,pinhole fracture,introgenic nerve or vascular damage,wound infection, osteomyelitis and so on. All patients were cured, the cured time was 3-9(5.2 ± 1.3) months. According to Dienst function evaluation standards, 9 were excellent, 14 were good, 2 were general,good rate was 92.0％ (23/25).According to the anatomical recovery outcome:5 anatomic reset, 17 function reset,3 close to the function reset. ConclusionThe treatment of C-type distal radius fractures treated by limited internal fixation combined with external fixator has the advantage of easy performance, reliable fixation, satisfactory effect,less complications, and this technique is worthy of being applied and popularized clinically.

Objective To evaluate the clinical efficacy of a1 receptor blocker (ARB) in treating voiding symptoms after TUVP and investigate its mechanism.Methods A total of 80 patients with BPH were randomly divided into 2 groups (40 cases for each).The patients in treatment group were given α1 receptor blocker at 1 day after TUVP for 30 days,while patients in control group did not receive ARB treatment.The indices such as Qmax,BRU,IPSS and QOL before operation versus 30 days after operation were monitored and analyzed.The therapeutic effect was compared between 2 groups.Results The changes of Qmax,IPSS,QOL and BRU after α1 receptor blocker treatment had significant difference between the two groups [(20.35 ± 1.62)ml/s,(11.25± 5.02)ml,(4.91 ± 1.30)scores,(1.13±0.30) scores vs.(3.92±1.20)ml/s,(529.24±7.19)ml,(31.33±2.56) scores,(5.48±0.42) scores,all P＜ 0.05].All the data of treatment group showed significant improvement compared with those of control group.Conclusions The α1 receptor blocker was effective in treating voiding symptoms after TUVP.

Objective:To study the influence of mycophenolic acid(MPA) on survival prolongation of heart allografts with tolerogenic dendritic cells(DCs ) in rat s. Methods:The influence of MPA on CTLA-4Ig-gene transferred donor DCs was observed in vitro morphologically and functionally. The influence of MPA on the survival time of the heart allografts was observed in a Blab/C→C57 Cervical Heterotopic Heart transplantation model with recipients treated by CTLA-4Ig-gene transferred donor DCs. Results:The maturation and aging of DC were delayed and the stimulating ability of DC to recipient splenic cells was impaired significantly with the adding of MPA . Survival time of renal allograft s in CTLA-4Ig-gene transferred DC group was prolonged significantly and further prolonged with the adding of MPA. The allografts functioned well even after 45 d postoperatively in recipient t reated with MPA preconditioned DC. Conclusion:MPA preconditioning impairs the ability of antigen presentation of CTLA-4Ig-gene transferred donor DCs and enhances it s efficacy of survival prolongation of heart allografts in mice.

Systematic observations were performed on the affinity constant, (Ka), and maximal binding capactiy (MBC) of brain nuclear receptor to T3 and T3 levels in brain at various stages over the whole life span of rats, with 1 day, 2,6,12 and 18 months of age for representing the infancy, childhood, youth, adult and aging stages, respectively. The results might be summarized as the followings: 1) Ka and MBC of nuclear receptor to T3 in cerebra were double of those in cerebel!a, but both did not alter significantly with age and sex; 2) the brain nuclear endogenous T3 levels were high in childhood and gradually decreased thereafter, and elevated slightly in aging; and 3) the occupancy of nuclear receptor by T3 in cerebra and cerebella of rats generally tended to decrease with age but increase slightly when aging.

The method for measuring glucocorticoid hormone receptors in rat splenic lymphocytes was developed. The results showed that there were specific binding sites of 3H-Dexamethasone with high affinity (Kd : 5,05?1.70 nmol/L), low binding capacity (Bm3s or R0 : 6773?585 specific binding sites/cell) and tempera- ture-dependent nuclear translocation in the rat splenic lymphocytes. This paper provides a convenient method for study of the molecular mechanisms of glucocor-ticoid hormone action and pathophysiology of glucocorticoid hormone receptors.