Compared to ligand-binding assay( LBA) , liquid chromatography coupled to tandem mass spectrometry( LC-MS/MS) methods could improve specificity, reduce the time of method development and enhance efficiency for quantitation of monoclonal antibodies( mAb) .This review summarizes the application of LC-MS/MS assays to the quantitation of mAb in order to facilitate the research of quantitation of mAb in drug development.

RNA interference (RNAi), as a new technology of gene therapy, has been used in the studies of many diseases in vitro, however, targeting delivery of small interference RNA (siRNA) is still a bottleneck for clinical therapy of siRNA agents. Aptamer is a group of oligonucleotides with high affinity and targeting, and is becoming another important means of delivery for siRNA. In this review, we summarized siRNA delivery obstacles in vivo and recent attractive developments increatively using cell-internalizing aptamers to deliver siRNAs to target cells.

As targeted drugs to B-cell malignancies, anti-CD20 monoclonal antibodies have been proved to be important in therapeutic antibody field. With three generations in more than ten years' development, the structures of these drugs have been improved, and many new indications have been found. Nowadays, these kinds of antibodies are not only used in the treatment of lymphoid malignancies, but also been proved to be useful in some autoimmune diseases treatment, and their new indications are still being expanded. With the optimization of their clinical dosage regimens, drug reaction has been increased, thus, therapeutic and side effects of anti-CD20 monoclonal antibody have been further improved as well. However, the exact mechanism of action of their combination therapy with other chemical drugs is still unclear, which remains to be further studied. This article reviewed new development of anti-CD20 therapeutic monoclonal antibodies research in recent years.

Objective To compare the treatment effect of laparoscopic appendectomy(LA)and open appendectomy(OA).To investigate the worth of endoscopic technology in LA.Methods 123 cases of LA and 989 cases of OA performed were studied retrospectively.The clinical data of two groups were summarized,contrasted and analyzed respectively.Results The times of operation,taking food and hospitalization in LA group were obviously shorter than those in OA group.The postoperative pain and the rate of incision infection in LA group were obviously superior to those in OA group.While the cost of hospitalization in LA was obviously higher than that of OA.Conclusion LA have advantages of minimal invasion,quicker recovery.safety and reliability,has significant advantages in treaing appendicitis and should be promoted.

Objective To compare the clinical effect of procedure for prolapse and hemorrhoids(PPH)improved,Milligan-Morgan hemorrhoideeomy and Ferguson-Mitchell hemorrhoidecomy in the treatment of the Ⅲ～Ⅳdegree mixed hemorrhoids.Methods 45 cases admitted for surgical treatment of Ⅲ～Ⅳ degree hemorrhoids,were randomly divided into 3 groups,the improved PPH,MMH and FMH were retrospectively reviewed,and it is separately reviewed for the operation time,pain index,length of hospital stay,return to normal activity time,postoperation complication and patients satisfaction etc.Results There was reasonably evidence in favor improved PPH for operating time,hospital stay,pain,anal discharge,and patients satisfaction.Conclusion The improved PPH is a safe and effective procedure for Ⅲ～Ⅳ hemorrhoids and its short-term outcome is more better than Milligan-Morgan and Ferguson-Mitchdl group.

Objectives:To investigate the changes of portal hemodynamics in patients with liver cirrhosis and its clinical value. Methods:Forty patients with liver cirrhosis and twenty healthy volunteers as controls were involved in this study.The max diameters,mean flow velocity,flow rate and congestion index(CI) of the portal vein trunks(PV) and splenic veins(SV) were detected by Color Doppler Ultrasound in all subjects. Results:The PV diameters(PVD), PVT flow rate(PVF), PVCI and SV diameter(SVD),SV flow rate(SVF),SVCI were significantly highter in patients than in controls( P

To study the pharmacokinetics of cantide, an antisense oligonucleotide, and its metabolites after iv gtt administration in rhesus monkeys, a dual solid phase extraction pretreatment method coupling with non-gel sieving capillary electrophoresis analysis method was used for determination of cantide and its metabolites in plasma and their pharmacokinetic parameters were calculated. The pharmacokinetic behavior of cantide and its metabolites (M1 and M2) after iv gtt administration (8, 16 and 24 mg kg(-1)) in rhesus monkeys were investigated. After iv gtt administration of cantide to rhesus monkeys, cantide in plasma was eliminated rapidly and the terminal elimination half-life (t1/2) was 57.91-77.97 min, the correlation coefficients (r) to the dose of Cmax AUC(o-inf) and AUC(0-t) of the prototype was 0.9918, 0.9568 and 0.9773, respectively. The metabolites of cantide reached the Cmax following cantide immediately and the Cmax of metabolites were lower than that of the prototype. The CL(S) of cantide and its metabolites (M1 and M2) were 1.60-2.19, 5.92-8.58 and 6.07-8.78 mL min(-1) kg(-1), respectively. So, it is concluded that the Cmax of cantide and its metabolites increased with the dose, which is the same as their AUC(0-inf) and AUC(0-t). The CL(S) of metabolites were higher than that of the prototype. The MRT and t1/2 of metabolites in the high dose group increased obviously.

Objective To design an integrated emergency medical treatment system mounted on helicopter, which can meet the requirements of field treatment and evacuation in emergency disasters or local wars, the system has immobile form and mobile form. Methods With the characteristics of existing helicopter considered, the components of the system were supposed to include a universal stretchers, overall structure and embedded emergency devices and support transport accessories. Results The system could realize the destination of swift response and air-and ground first-aid, the new model of swift response can made the regulation and principle of first -aid more reasonable, and increases the survival rate significantly. Conclusion Critical diseases have become the latest killer in daily life. The first-aid on spot need the new model of swift response and air -and ground first -aid, the system can decrease the invalidity and mortality.

Objective:To deteat N‐terminal pro B type natriuretic peptide (NT‐pro BNP) and cystatin C (Cys C) con‐tent in Kazak patients with hypertensive heart disease (HHD) complicated heart failure (HF) and analyze the corre‐lation between them .Methods :A total of 100 Kazak HHD patients were divided into hypertension complicated HF group (Complicated HF group , n=50) and pure HHD group (n=50) .Venous blood sample was taken within 24h after hospitalization for measuring serum levels of NT‐proBNP and Cys C ,then they were compared and analyzed between two groups .Results:Compared with pure HHD group ,there were significant rise in serum levels of NT‐proBNP [ (246.53 ± 165.65) ng/L vs .(4568.32 ± 2722.36) ng/L] and Cys C [ (0.82 ± 0.31) mg/L vs .(1.93 ± 2.46) mg/L] in complicated HF group , P< 0.01 both .Spearman correlation analysis indicated that serum NT‐proBNP level was positively correlated with Cys C level in complicated HF group , r=0.961 , P<0.01. Conclusion:In Kazak patients with hypertensive heart disease complicated HF ,serum NT‐proBNP and Cys C levels significantly rise and they significantly positively correlate ,so it suggest there may be slight damaged renal function also .

An enzyme linked immunosorbent assay ( ELISA ) and a flow cytometry assay ( FCA ) based on Wil2-S cells were developed and systematically compared for quantification of recombinant anti-CD20 humanized monoclonal antibody ( rh-anti-CD20zumab) in biological matrix. The specificity, precision and accuracy of each method at correspondingly different linear range showed good results. For ELISA, the precisions of intra-day and inter-day were both <19 . 5%, the relative error was from-18 . 2% to 17 . 6%;For FCA, the precisions of intra-day and inter-day were both <19. 0%, the relative error was from -18. 9% to 18. 4%. The sensitivity of ELISA was significantly higher than that of FCA. The quantitative ranges of ELISA and FCA methods were 0. 04-5. 0 mg/L and 3. 1-200 mg/L, respectively. The concentrations in serum samples and pharmacokinetics analysis were determined by both of two methods after vein drip administration of rh-anti-CD20zumab in rhesus monkeys. Pharmacokinetics data showed that there was excellent consistency between results obtained by two methods at the given dose. We believe that the novel FCA with high speed and high sensitivity can be used to perform PK and PD study of cell surface antigen-targeted antibody derivatives.