Objective To investigate the effect of heparin on the apoptosis and proliferation of human myeloid leukemia cell line K562 induced by vincristine.Methods K562 cells were pretreated by heparin for 1h,then cultured with 0.05 mg/L vincristine in 37℃ 5% CO2 for 24 h.Apoptosis of KS62 cells was evaluated by Hoechst 33342 staining,flow cytometer and DNA agarose gel electrophoresis after culture for 24 hours.The effect of heparin on KS62 cell proliferation and toxicitv was determined by Trypan blue staining and MTT assay.Results In the apeptosis induced group,the apeptosis rate was 40.10% dected by Hoechst 33342 fluorescence staining.The hepafin in different concentrations was found to be able to inhibit the apoptosis of K562 cells triggered by vincristine and the apoptosis rate was 32.47%,29.7%,25.5%,19.53% in the heparin groups of 25,50,100,200 U/ml,respectively.The apeptosis rate was significantly lower in the apeptosis induced group than in the heparin groups of 25,50,100,200 U/ml(P＜0.05).The typical DNA ladder could be found in the apoptosis-induced group,and the DNA ladder gradually disappeared along with the increase of heparin(5～200 U/ml).The sub-G1 peak of K562 cells could be found in the induced group by FACS and the apoptosis rate was 21.61%.In the heparin groups of 25,50,100,200 U/ml,the sub-G1 Peak of K562 cells gradually dropped and the apoptosis rate was 13.64%,11.75%,8.59%,6.03%(P＜0.05),respectively.After K562 cells were incubated with different hepafin concentrations(5～200 U/ml)for 24 hours,there was no difference compared with the normal control group in both the total live cell numbers and the cell proliferation rate measured by trypan blue staining and MTT assay(P＞0.05).Conclusion The results suggested that heparin had no influence on KS62 cell toxicity and proliferation,but may inhibit the apoptosis of KS62 cells induced by vincristine.

Objective To evaluate the uncertainty of the pseudo-ginsenoside GQ (PGQ) concentration in human plasma by HPLC-MS/MS.Methods The whole process of PGQ determination by HPLC-MS/MS in human plasma was evaluated and the uncertainty caused by repeatability,weighing,standard solution preparation,biological sample preparation,extraction recovery process,recovery,instrument precision and calibration curve fitting were evaluated,respectively.The combined and expanded uncertainty values were both calculated.Results The expanded uncertainty values for low (15.16 ng·mL-1),medium (2 516.67 ng·mL-1) and high (3 902.00 ng·mL-1) levels of PGQ were 1.39,177.74 and 262.69 ng·mL-1,respectively (P =95 ％,k =2).Conclusion The uncertainty of the PGQ determination in human plasma by HPLC-MS/MS is mainly caused by recovery,repeatabihty and sample preparation at low concentration,by sample preparation and recovery at medium and high concentration.

Objective To observe the effect of Interferon-α2b on HEL cells (human erythroleukemia cell line) growth, apoptosis and JAK2 V617F mutation gene expression. Methods HEL cells were placed in RPMI1640 containing 10% FBS and incubated in a cell incubator. Cells in the logarithmic growth phasem were collected, adjusting the cell density to 1 × 105/mL for experimental research. The interferon concentration in five groups were 0, 5 × 105, 10 × 105, 50 × 105, 100 × 105 U/L, with different incubation time (0, 24, 72, 120 h), respectively. The cell growth status in different groups was observed in the inverted optical microscope; MTT was used to detect the inhibition of interferon on HEL cell proliferation. Cell apoptosis was detected by flow cytometry. Fluorescence quantitative PCR was used to detect the mutation gene of JAK2 V617F expression. Results Inhibition rates of Interferon on the HEL cell proliferation in 5 × 105 U/L, 10 × 105 U/L, 50 × 105 U/L, 100 × 105 U/L groups were 18.57%, 25.10%, 42.10%, 57.00%, respectively. JAK2 V617F/GAPDH by fluorescence quantitative was 1.556, 1.213, 0.870 respectively under the concentration of interferon 100 × 105 U/L for 24, 72, 120 h. Conclusions Interferon-α2b can inhibit HEL cells proliferation and induce HEL cells apoptosis. Increasing concentration of interferon increases HEL cell apoptosis rate. Interferon can inhibit JAK2 V617F expression of HEL cells in a dose-dependent manner.

Objective:To investigate the diagnosis and treatment significance of invasive and noninvasive operation for ventilator?as?sociated pneumonia ( VAP ) . Methods:A total of 80 cases of VAP suspected patients who had received mechanical ventilation at least 48 hours in ICU from Jun 2014 to Mar 2015 were enrolled. Patients were randomly divided into four groups including noninvasive operation group ( F) , invasive operation group ( Q) , mix group 1 ( H1) and mix group 2 ( H2) . VAP diagnosis rate between groups as well as living time, antibiotic use time, survival rate, calcitonin levels and APACHE II score, oxygenation index were analyzed. Results:Specimen from invasive operation had higher specimens to cultivate positive rate than that from noninvasive operation ( P<0?05), but there was no statistic significant difference in VAP diagnosis rate between two methods (P>0?05). Conclusion:Noninva?sive operation collecting samples for VAP diagnosis is also accurate as invasive one. Collecting specimens from sputum suction tube in the clinical treatment on airway suction is a low cost and simple noninvasive operation.

Aromatic antiepileptic drugs such as carbamazepine are the first-line treatment for epilepsy. The adverse reactions have greatly limited their clinical application. The occurrence rate of severe skin adverse reactions such as Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN) is low,but they are often fatal.Human leukocyte antigen (HLA) gene polymorphisms are reported to be related with skin adverse reactions caused by aromatic antiepileptic drugs,but the exact mechanism is unclear.This article will perform a review about the correlation between skin adverse reactions caused by aromatic antiepileptic drugs and HLA gene polymorphisms published in recent years,in order to provide theoretical basis for further study of HLA susceptibility genes in Chinese Han population,and provide a reference for achieving individualized treatment of epilepsy.

OBJECTIVE：To provide reference for the early diagnosis and selection of treatment regimens of pregnancy- associated breast cancer （PABC）. METHODS ：The disease characteristics ，treatment process and prognosis of 2 cases of PABC were analyzed in our hospital. The relevant literature published from Jan. 1986 to Apr. 2019 in PubMed database was retrieved. The case reports that the title ，keywords or abstracts involved “Breast cancer and pregnancy ”“Pregnancy-associated breast cancer ” “Breast cancer during pregnancy ”“Breast carcinoma during pregnancy ”“Case reports ”were included. Cases which didn ’t meet the definition of PABC were excluded. The general information ，tumor clinical characteristics ，drug treatment plan ，maternal/fetal prognosis and other information of patients were extracted for summary and descriptive statistical analysis. RESULTS & CONCLUSIONS：Two patients were both diagnosed during lactation. The prognosis was good after neoadjuvant chemotherapy and surgical resection. A total of 36 case reports were obtained through literature search and screening ，as well asclinical data of 45 patients（39 diagnosed during pregnancy and 6 diagnosed during lactation ）.Neoadjuvant chemotherapy AC regimen （doxorubicin+ cyclophosphamide）was used in 35.0％（14/40）of cases after excluding the cases without relevant information ；elective caesarean section was performed in 59.5％（22/37）of cases ，37.8％（14/37）of cases were delivered ，and 1 case chose to terminate pregnancy；survival rate of patients was 80.8％（21/26），and the average weight of newborns was 2 407 g（1 015-3 830 g）. Six patients each received taxanes during pregnancy and 9 patients during postpartum. The determination of chemotherapy for PABC should comprehensively consider a variety of factors. It is necessary to comprehensively weigh the benefit risks of the mother and child，try to avoid chemotherapy in early pregnancy ，and especially consider the impact of chemotherapy on the fetus. The chemotherapy regimen is still dominated by anthracyclines. Based on this ，an individualized regimen is formulated and close monitoring should be performed when using paclitaxel.

OBJECTIVE： To provide reference for the revision of China National Formulary for Children and make a sample for Chinese medical institutions to formulate their own formulary. METHODS： The suggestions on formulary revision and the formulation of formulary in medical institutions were put forward through comparing the selection principle， catalogues， chapters， drug items， formulary quantity and coincident drugs of World Health Organization （WHO） Model Formulary for Children （2010 edition） （WMFc）， British National Formulary （Children edition） （2016-2017 edition） （BNFc）， Chinese National Formulary （Children edition） （2013 edition） （CNFc）. RESULTS & CONCLUSIONS： The selection principle of WMFc was safe， effective and economical； that of BNFc was accurate and up-to-date， that of CNFc was safe， effective， economical and appropriate. The catalogues of three formularies included introduction， outline and separated section， but the contents or descriptions were different. For example， in separated section， WMFc was divided into 27 chapters， BNFc was divided into 16 chapters and CNFc was divided into 20 chapters. The chapters and catalogues of WMFc were classified according to ATC； those of BNFc were classified according to organ system and disease arrangement； those of CNFc were classified according to disease treatment system. 15 chapters of three formularies were the same， such as drug for nervous system diseases， drug for endocrine system and drug for respiratory system. The unique chapter of CNFc was “drugs for stomatological diseases”. The drug items of three formularies included drug name， indications， usage and dosage， contraindication， ADR， matters need attention， preparation and specifications， etc. Compared with CNFc， unique chapters of WMFc included ATC numbering， drug interaction， liver injury， etc.； those of BNFc included pharmacological action， interaction， allergy， etc. WMFc contained 271 drugs， CNFc 847 drugs and BNFc 955 drugs. Among them， there were 166 overlaps between WMFc and CNFc， 359 between BNFc and CNFc， 174 between WMFc and BNFc. There were 141 same drugs in the three formularies. When revising or formulating formulary， our country should not copy them mechanically， but should revise formulary according to our national conditions. It is necessary to refer to selection principles of WMFc and BNFc， update our children’s formulary in certain or real time， standardize drug access criteria of formulary， rationally increase the variety of drug and call on the relevant departments of the state to improve the standards for the formulation of drug instructions for children.