To measure the relative affinity and type Specificity of neutralizing monoclonal antibodies against the hexon antigen of adenovirus type 7,a simple ELISA double antibody binding system has been developed.By this method,ralative affinity of nine MAbs was estimated from the antibody concentrations at approximately 50% of plateau binding and were ranked.The theoretical basis for this method was discussed. Hybridomas secreting antibodies of desired affinity can be selected at an early stage after fussion by measuring relative affinity of hybridomas supernatants.The type specificity was judged by the difference between end-point concentration against adeno- virus type 7 and type 3.And the relation between affinity and specificity of MAbs was discussed.

Objective:To investigate the changes and clinical implications of serum procalcitonin in exacerbation of chronic obstructive pulmonary disease(COPD).Methods:We have evaluated PCT measurement in 45 patients with an exacerbation of COPD(group A) and 25 patients with stable COPD(group B),quantitative sputum culture was performed,too.PPMs were only regarded as significant if they reached a growth of ≥10~7cfu/mL,indicating the presence of bacterial infection.Results:In patients with an exacerbation,15 patients,sputum yielded a high(≥10~7cfu/mL) bacterial load(group A_1),30 patients,sputum yielded a low(0.05).Using a cut-off point of 0.155?g/L for PCT,the sensitivities and specificities for bacterial infection in patients with an exacerbation of COPD were 93.3% and 60% respectively.Conclusion: Serum procalcitonin measurements in patients of an exacerbation of chronic obstructive pulmonary disease play a role in the diagnosis of bacterial infection.

Objective To observe the poet-operative clinical inpact on cervical intraepithelial neoplasia surgery by Loop elcctrosurgical excision procedure(LEEP),gelatin paste to improve the healing of the Cut,prevent the post-operative bleeding,and find out effective methods of preventing LEEP complications.Methods 100 patients with cervical intraepithelial neoplasia underwent LEEP in clinic.Divide them into two groups randomly,60 patients were adopted gelatin paste post-LEEP ag the cure group.while 40 patients were adopted as control group.Observation Vaginal bleeding,infection and cervical rear in short-term.Results In 60 patients of cure group,never patients with vaginal bleeding,infection and the cut healing in the short time.In 40 patients of control group,three patients with vaginal bleeding,two patients with infection,and three patients with bad healing.The different between two group with vaginal bleeding,infection and the cut healing time was significant(P＜0.05).Condusion gelatin paste can reduce bleeding.infection and cervical repair bad cmpllcations after cervical intraepithelial neoplasia surgery by LEEP.

Objective:To investigate the role of anaphylatoxin C 5 a in patients with asthma .Methods:A prospective study was performed between September 2006 and February 2007.A total of 33 patients with acute exacerbation of asthma and 13 healthy subjects were recruited into the study .The patients with acute exacerbation of asthma were also studied when they returned to the remission state .Levels of lung function, levels of C5a in induced sputum and cell differential count in induced sputum were determined . Results:The level of C5 a in induced sputum was significantly higher in patients with acute exacerbation of asthma [0.85(0.68-2.13) μg/L] than that in patients with stable asthma [0.45(0.26-0.88)μg/L, Z=-2.193, P=0.013];Sputum C5a levels in stable asthma patients were significantly higher than those in healthy controls [0.14(0.06-0.45) μg/L, Z=-2.141, P=0.015].The level of C5a in patients with severe exacerbation [2.21(1.27 -9.0) μg/L] was significantly higher than those in patients with mild exacerbation [0.34(0.17-0.63) μg/L] and moderate exacerbation [0.85(0.55-1.67) μg/L,χ2 =12.330, P=0.001].The level of C5a in induced sputum was positively correlated with the number of total cells count (r=0.797, P=0.004), neutrophils (r=0.504, P=0.032) and macrophages ( r =0.424, P=0.036 ) in acute exacerbation of asthma .Conclusion: C5a levels in induced sputum could be identified as an important prognostic biomarker , which involved in asthma ’ s pathogenesis .

Total knee arthroplasty (TKA) identified as an effective treatment for ultimate knee joint disease can effectively relieve pain, correct deformity, improve knee function and enhance the quality of life of patients. Patient satisfaction has been increasingly considered as an important factor in evaluating the success of primary TKA. Anterior knee pain that usually appears in the region of the anterior knee is a recognized complaint for primary TKA and has a strong impact on the improvement of knee function and patient satisfaction of primary TKA. Accordingly, the relief of anterior knee pain has become one of the primary goals of primary TKA. At present, soft tissue lesions around the patellar caused by patellar maltracking and the elevation of internal pressure in subchondral bone because of the high contact stress of patellofemoral joint are both considered as the mechanism of anterior knee pain. For the past few years,on increasing number of studies have focused on the prevention of anterior knee pain following primary TKA. However, none of the past treatment such as patellar resurfacing, patellar denervation without patellar resurfacing or a mobile-bearing prosthesis has a good and affirmative effect on it. The prevention and treatment of anterior knee pain following primary TKA still is a difficult solved problem. To address this problem, we need further researches about the cause of anterior knee pain, knee joint prosthesis and biomechanics of patellofemoral joint, as well as lots of randomized controlled trials.
Arthralgia ; etiology ; prevention & control ; Arthroplasty, Replacement, Knee ; adverse effects ; Humans ; Knee Joint ; surgery ; Randomized Controlled Trials as Topic

The hemolysin production of 19 strains of Streptococcus spp. isolated from pigs in the Jiangsu and Shanghai regions in recent years were examined. Eight isolates of Streptococcus suis type 2 from Jiangsu showed weak hemolysis on blood agar, but a stronger reaction in Todd-Hewitt broth(THB). The hemolysin belonged to the group of thiol-activated hemolysins. Nine strains of Streptoccus equi subsp. zooepidemicus showed strong hemolysis on blood agar and in THB containing 5% new-born calf serum, but no hemolysis in THB alone. This hemolysin was similar to streptolysin S(SLS). Another two isolates were atypical members of Lancefield group C Streptococcus and showed strong hemolysis on blood agar and in THB with 5% new-born calf serum, but the hemolysin was unlike either streptolysin O or SLS.

Objective The aim of this study is to evaluate the accuracy of EUS in rectal cancer restaging after neoadjuvant therapy. Methods EUS staging was performed after neoadjuvant therapy in 61 patients who were diagnosed as having local advanced rectal cancer. All patients underwent subsequent surgi-cal resection and complete pathologic staging. Results Compared with pathological staging, the total accura-cy of post-therapy EUS T-staging was 59.0% (36/61). The T-overstaging rate was 36.1% (22/61) and un-derstaging rate was 4.9% (3/61). Accuracy of EUS N-staging was 68.9% (42/61), N-overstaging and un-derstaging rates were 14.7% (9/61) and 16.4% (10/61), respectively. Conclusion The accuracy of EUS restaging for rectal cancer after neoadjuvant therapy is relatively low.

Objective To investigate the left ventricular (LV) torsion parameters of type B WolffParkinson-White syndrome (B-WPW) and to explore alternation of the left ventricular motion pattern in patients with B-WPW.Methods Thirty-eight patients with B-WPW were studied.And 40 volunteers were selected as control.Two-dimensional speckle tracking imaging (2D-STI) was used to acquire left ventricular torsion parameters,including peak value and time to peak value of LV twist,LV apex rotation,and LV base rotation.Apical-basal rotation delay (RDA-B) was calculated.Biplane Simpson method was used to measure LV end-diastolic volume (LVEDV),end-systolic volume (LVESV) and ejection fraction (LVEF).All above parameters were measured in patients with B-WPW before (B-WPW-B group) and after (B-WPW-A group) radiofrequency catheter ablation and in control group.The QRS width of lead Ⅱ was recorded,and the relationships between all above parameters with the RDA-B or QRS width were analyzed.Results Compared with the contrd group,in patients with B-WPW,the peak value of LV apex rotation (RotA),LV base rotation (RotB) and LV twist (TwistLV) were lower(LV base was more obvious than LV apex)(P ＜0.05),the time to RotB (TTPB) was shorter (P =0.004),RDAB was longer(P =0.002),the left ventricular enlarged and the QRS prolonged (P =0.000).After radiofrequency catheter ablation,the left ventricular torsion parameters in patients with B-WPW recovered significantly(P ＜0.05),but still lower than those in the control group(P ＜0.05).Conclusions The left ventricular motion pattern of patients with B-WPW alters,including the changes of peak value and time to peak value in LV apex rotation,LV base rotation and LV twist,as well as LV myocardium dyssynchrony.The motion pattern of LV in patients with B-WPW is improved in acute stage after radiofrequency catheter ablation but not yet recover totally.

With the in-depth study of related substances and the development of consistency evaluation of generic drugs, relative correction factors are gaining increasing attention. By analyzing the domestic and foreign literature on correction factors in recent years, this paper describes the correction factor component, the current measurement method and its application. The rules and key points of use of an impurity correction factor and its determination and application are described, and some problems in its determination and application are discussed, providing a reference and basis for the standardization of research on impurity correction factors in the future.

Objective To evaluate the efficacy and safety of infliximab plus methotrexate combination therpy in Chinese with rheumatoid arthritis patients.Methods This was a double-blind placebo-controlled phaseⅢclinical trial,173 patients who had active rheumatoid arthritis were randomised to placebo(n=86)or infliximab(n=87)group on a background of a stable dosage of methotrexate.Patients were assessed at weeks 0,2,6,14 and 18.Results At week 2,the American College of Rheumatology(20)response criteria,which represent a 20% improvement from baseline,the same results with swollen joint count,tender joint count,du- ration of morning stiffness,VAS score,CRP,ESR were achieved in 52.9% of patients,compared with 14.0% of patients receiving placebo plus methotrexate.A 20% improvement was achieved in 75.9% of infliximab plus methotrexate at week 18,compared with 48.8% of patients on placebo plus methotrexate(P=0.0003).A 50% improvement was achieved in 43.7% of infliximab plus methotrexate at week 18,compared with 25.6% of pa- tients on placebo plus methotrexate(P=0.011).Infliximab was well-tolerated;withdrawals for adverse events as well as the occurrence of serious adverse events or serious infections were similar to those in the placebo group.There was only one case of tuberculosis in the treatment group.Conclusion Treatment with infliximab plus methotrexate is more effective than methotrexate alone in patients with active rheumatoid arthritis.It has rapid onset of effect and the efficacy is persistent.