OBJECTIVE To study whether the ciprofloxacin(CIP)combined with amikacin(AMK)will decrease the drug-resistant mutants of Escherichia coli(ECO)in vitro.METHODS The MIC of CIP and AMK alone was determined by agar plates dilution method,and the combined MIC by checkerboard method.The mutant prevention concentration(MPC)both alone and combined was determined by the method of agar plates dilution method,and then the value of selectiveity index(SI)(MPC/MIC)would be acquired.RESULTS The SI of two antibiotics separatedly were 16(CIP)and 32(AMK).When two antibiotics combined,if the concentration of AMK and CIP reached 2MIC could restrain the mutants.After these two antibiotics combined,the value of SI(MPCcombined/MICcombined)came to be 8(0.008/0.001)and 8(2.0/0.25).CONCLUSIONS Compared with alone,CIP and AMK combined can decrease the MPC and SI to ECO,and have the more effect to AMK.In this way,we can reduce the drug-resistant mutants.

ObjectiveTo determine the possible causes for functional delayed gastric emptying (FDGE) and its diagnosis and treatment. MethodsThe clinical data of 53 FDGE patients after subtotal gastrectomy from 1987 to 2001 were retrospectively analysed. ResultsAll the 53 patients were recovered and discharged. Among them, 11 were misdiagnosised as mechanical ileus and were reoperated on. ConclusionsThe main cause of FDGE may be the disturbance of gastrointestinal motility which may be caused by vegetative nerve injury during the operation. The main therapy is non-surgical treatment and reoperation should be avoided at the early stage.

32,16,16.Combined with azithromycin were8,16,16,8.MEM,CAZ,CIP combined with AMK were 1,4,8.AMK combined with CIP were 4.Conclusion Compared with sole,MEM,CAZ,CIP combined with azithromycin can reduce the MPC and SI of antibiotics alone to pseudomonas aeruginosa and restrain the drug-resistant mutants.But the capacity of preventing mutants arise were weaker than combined with AMK.AMK combined with azithromycin can't reduce the SI.But when combined with CIP,the SI of AMK were reduced greatly.

Objective To investigate the characteristics of PMP22 duplication mutation and the clinical variability of Charcot-Marie-Tooth disease type 1A (CMT1A) patients. Methods PMP22 duplication mutation analysis were performed in 45 cases diagnosed probably CMT by combination of improved allele-specific PCR-restriction enzyme digestion and short tandem repeat (STR) analysis based on laser-induced fluorescence detection in capillary electrophoresis. The clinical features of the positive cases were precisely analyzed. Results With the combined use of two methods, PMP22 duplication was detected in 21 cases, i.e. 10 CMT1 cases with typical presentations including weakness and atrophy in the distal limbs, and 11 atypical cases with special phenotypes including 1 case with mild dizziness, 1 case with hearing loss, 2 cases with recurrent limbs weakness, 2 cases with postural tremor in the upper limbs, 4 cases with cerebellar ataxia and 1 case with epilepsy. Conclusions The improved allele-specific PCR-restriction enzyme digestion provides the accurate, reliable and feasible method to detect PMP22 duplication, which is the most common cause of CMT. Comprehensive analysis of clinical, electrophysiological and pathological features of the CMT1A patients with positive PMP22 duplication indicate the high clinical variability of this disease.

Objective To study the changes of endothelin,nitric oxide and vascular endothelial growth factor level in patients with type 2 diabetic retinopathy (DR). Methods Eighty diabetes patients (53 with diabetic retinopathy and 27 without). Another 30 healthy volunteers were recruited as control. Plasma ET and VEGF levels were measured by enzyme-linked immunosorbent assay. NO levels were measured by nitrate reductase method. Results Plasma levels of ET were higher in patients with type 2 diabetes with DR (DR)(80. 68 ± 13.57) mg/L than (65. 33 ± 11.24) mg/L, (45.25 ±9. 06) mg/L, in control and in type 2 diabetes patients without DR (NDR) (Ps ＜ 0, 01 ). Plasna levels of NO in DR group (69. 82 ± 14. 89) μmol/L were higher than (37. 85 ±-9. 11 ) μmol'L, in control group,but lower than (77.52 ±± 18.56) μmol/L in NDR group (Ps ＜ 0. 05 ). Plasma levels of VEGF ( 110. 52 ± 25.65 ) μg/L in DR were significantly increased compared with control (82.42 ± 18. 47 ) μg/L, and NDR(97.55 ±25.61)μg/L, (Ps ＜0.05).Conclusion ET, NO and VEGF may be involved in the pathogenesis of type 2 diabetic retinopathy.

ObjectiveTo explore the expression of Glut1, HIF-1α and Ki-67 in hepatocellular carcinoma (HCC) and their relationship between their expression and clinicopathological features.MethodsImmunohistochemical study (EnVision method) for Glut1, HIF-1a and Ki-67 were performed on tissue microarray which consisted of 171 cases of HCC, 55 cases of adjacent non-neoplastic liver tissues, and 22cases of normal liver tissues.ResultsThe expression rate of Glut1 ,HIF-1α and ki-67 in 171 cases of HCC was 15.2％, 19.9％ and 66.1％, respectively, which was much higher than that in the adjacent non-neoplastic liver tissues (1.8％ ,1.8％and 5.5％) and normal liver tissues(all negative).The expressions of Glut1 and HIF-1α were positively correlated with the differentiation degree of HCC and TNM stage(P ＜0.01, P ＜0.05).The expression of ki-67 was positively correlated with the differentiation degree of HCC.There was a significant positive correlation between the expressions of Glut1 and HIF-1α in HCC (r1 =0.553, P ＜0.05), the expressions of Glut1 and HIF-1α were positively correlated with ki-67(r2 =0.560,r3 =0.613, P ＜0.05).ConclusionsGlut1, HIF-1α and ki-67 may play a role in the tumorigenesis and progression of HCC in some degree.Combined detection of Glut1, HIF-1α and Ki-67 may be helpful to judge the degree of malignancy and potential metastasis and evaluate the prognosis.

Objective To quantitatively detect intragraft and peripheral blood monocyte cells (PBMCs) perforin mRNA,and analysis the relationship between acute rejection and perforin mRNA. Methods In the allograft group Wistar and male SD rats were used as donors and recipients.SD rats served as donors and recipients in the isograft group.The graft specimens were harvested 5 days postoperatively.They were examined histologically after sectioning and staining with hematoxylin and eosin,Masson’s trichrome, periodic acid-Schiff reagent and periodic acidsilver metheramine.And then the fluorescent quantitative PCR was employed to measure the intragraft and PBMCs expression level of perforin mRNA. Results The histological scores in allograft and isograft kidney samples were 2~5 (3.43?0.98) and 0~1 (0.71?0.49)(P