In recent years,considerable progress has been made in the treatment of multiple myeloma(MM).However,despite the current improved prognosis of this malignancy,it always ends in relapse and therefore new therapeutic approaches are urgently needed to overcome it.The chimeric antigen receptor(CAR)-T cells targeting B cell maturation antigen(BCMA),cluster of differentiation 19(CD19),cluster of differentiation 38(CD38) and kappa light chains have been evaluated,and have achieved remarkable results in clinical trials.However,even when MM is treated with CAR-T cell therapy,most patients eventually relapse,which is the greatest limitation of this therapy.This paperreviewedthe research progress,limitations and optimization of CAR-T cell immunotherapy in the treatment of MM.

Gefitinib and erlotinib are the first generation of targeted therapeutic agents approved for the treatment of advanced non-small cell lung cancer. Despite a dramatic initial response, most patients subsequently and ultimately become resistant to the drugs. Recent studies have proposed various mechanisms of such resistance, some of which related to a second mutation in epidermal growth factor receptor, aberrant activation of other tyrosine kinase receptors, bypassing signal pathways and constitutive activation of downstream signal molecules. Other researches also associated the drug resistance to internalization of epidermal growth factor receptor and changes in tumor microenvironment. Furture studies need to focus on overcoming or reversing resistance to the drugs and developing new targeted therapeutic agents.

Objective To establish a HPLC method to determine the antiseptics in compound dexamethasone acetate cream and evaluate the usage rationality of antimicrobial preservatives. Methods The content of ethyl hydroxybenzoate was calculated by external standard with HPLC.The effectiveness of antimicrobial preservatives was measured according to the preservative effectiveness test in ChP(2015edition) by inoculating 5 kinds of test microorganisms including Pseudomonas aeruginosa,Escherichia coli,Staphylococcusaureus,Candida albicans and Aspergillusniger.Results The linear ranges of ethyl hydroxybenzoate was 6.63-132.6 μg/mL ( r =0.999 7 ) .The average recoveries was 99.2%.The samples from different batche had different antimicrobial effectiveness due to the content of ethyl hydroxybenzoate.Conclusion The described method can be used in the determination of the preservatives of ethyl hydroxybenzoate in compound dexamethasone acetate cream.At present the use of antibacterial agent is arbitrary, it is necessary to strengthen research and supervision.

Objective To interview the work feelings of the Middle youth patients with peritoneal dialysis. Methods Using the purposive sampling method, 11 patients were interviewed, and analyzed the content of the interview. After the interview, data were transcribed and extracted the keywords. Results Eight keywords were extracted, the patients had four positive feelings:self-perceived burden relived;more social support; more glad, negative feelings relived; peritoneal dialysis could be sure. 4 negative themes were extracted:tedious;had economic pressure;lack of self-realization;could not take the family burden. Conclusions Work can improve the living conditions of middle youth patients with peritoneal dialysis. More patients should be encouraged to return to work.

A systematic comparative study ou the morphology and histology of the rhizomes of polygonatum including "Huangjing" and "Yuzhu" currently available on the Chinese market werepresented. The differences between this two types of herbal medicines were given.

The material of this paper comes from a real consolidation case of the radiography department of a hospital, which succeeds in sharing several automatic processors through layer 3 switching.

Objective:To explore influence of large dose atorvastatin therapy on ventricular remodeling in rats after myocardial infarction.Methods:A total of 48 male SD rats were randomly and equally divided into myocardial in-farction (MI)control group (received deionized water gavage),routine dose group (received atorvastatin 20mg/kg gavage four weeks before and after MI model was established)and large dose group (received atorvastatin 80mg/kg, in the same way as routine dose group).On two days after MI,hematoxylin eosin (HE)staining was used to detect pathological changes of myocardial tissue;four weeks later,Masson staining was used to evaluate myocardial fibrosis while echocardiography was used to assess cardiac chamber size and heart function,the results were compared among three groups.Results:Pathologic change:On two days after MI,color of stained myocardial tissue was uneven, muscular fiber arranged in turbulence,there were partial dissolved muscle focus and blockbuster collagenous fiber in MI control group;color of stained myocardial tissue was lack of even,arrangement of muscular fiber was irregular, there were less dissolved muscle focus and collagenous fiber in routine dose group;color of stained myocardial tissue was slightly uneven,muscular fiber still arranged in rules and there was very few dissolved muscle focus and still more survived myocardium in infarct area,and small amount of collagen fibrosis was found in myocardial cell clear-ance after four weeks in large dose group.Change of left ventricular structure and function:Compared with MI con-trol group and routine dose group,the left ventricular end-diastolic dimension [LVEDd,(7.68±0.54)ml vs.(7.06 ±0.68)ml vs.(6.37 ± 0.40)ml] significantly reduced in large dose group, left ventricular ejection fraction [LVEF,(33.0±7.9)% vs.(39.3±2.8)% vs. (48.7%±9.1)%]significantly rose (P <0.05,or <0.01);but those indexes no significant difference between MI control group and routine dose group (P =0.059,0.146 respec-tively).Conclusion:Large dose atorvastatin may significantly relieve ventricular remodeling after infarction.

Objective:To explore the effects of levocarnitine adjunctive therapy on serum nutritional index and inflammatory factor level in maintenance hemodialysis patients. Methods:Totally 62 patients with hemodialysis were randomly divided into the observation group and the control group with 31 cases in each. The observation group was treated with 1g levocarnitine injection with intravenous in-jection after the dialysis, and the control group was treated with 0. 9% physiological saline injection with the same volume after the di-alysis. After 3-month treatment, the nutritional indices including Hb, Alb, TC, TG, LDL-C and HDL-C and the change in inflamma-tory factors including C-reactive protein (CRP), IL-6, IL-8 and TNF-α of the patients in the two groups were studied and compared. Results:After the treatment, the level of Hb and Alb was improved in the observation group (P<0. 05), while the level of TC, TG, HDL-C and LDL-C had no significant change (P>0. 05). All of the indices showed no significant change in the control group (P>0. 05). After the treatment, the level of Hb and Alb in the observation group was higher than that in the control group (P<0. 05). After the treatment, the level of CRP, IL-6, IL-8 and TNF-α was reduced in the observation group (P<0.05), while the control group had no significant changes in the indices (P>0. 05). All of the indices in the observation group was better than those in the control group (P<0. 05). Conclusion:Levocarnitine used in the treatment of patients with hemodialysis can effectively improve the nutritional status and inflammatory factors level without obvious effects on lipid metabolism, which is very important for the reduction of complication and the improvement of life quality, and worthy of clinical promotion.

Objective In order to provide a large quantity of retinal pigment epithelial cells (RPE cells) in vitro, we want to estab-lish method for culturing pig RPE cells. Methods RPE cells were separated with trypsin and cultured in vitro. The cells were identified by immunohistochemical staining with anti-human keratin and transmission electron microscope (TEM). Results Cultured RPE cells gradually presented transparent and fusiform shape. Immunohistochemical staining demonstrated that the cells were stained by anti-human keratin, and the cultured cells showed typical ultrastructure of RPE cells. Conclusion The cultured cells may be the foundation of pig RPE cells.

BACKGROUND:Induced pluripotent stem cel s can bypass the ethical issues of embryonic stem cel s, and become the hotspot of stem cel research. OBJECTIVE:To explore the research progress and problems of induced pluripotent stem cel s. METHODS:A retrospective analysis on the findings, research progress and problems of induced pluripotent stem cel s in recent years was performed. The Thomson Reuters Web of Science was searched for the articles related to the induced pluripotent stem cel s and p53 gene. RESULTS AND CONCLUSION:In recent years, domestic and foreign scholars have conducted a lot of researches on induced pluripotent stem cel s. For example, a Japanese group is establishing the stem cel bank to provide a basis for the treatment of retinal diseases. However, the safety issues of induced pluripotent stem cel s need to be solved before routine cel treatment application, in which the functional research of related p53 gene is one of the essential concerns. The other member of p53 gene, p73 gene, also participates in the generation and differentiation of induced pluripotent stem cel s, and the in-depth studies are needed. The finding of p53 gene function wil promote the in-depth development of regenerative medicine and translational medicine.