Objective In order to study the value of drug treatment for leukemia, quercetin was delivered to the cultured NB4 cell line. MethodsUsing RT- PCR and western blot, we studied the expression of mutant p53 gene and protein after inducing 24, 48, 72, 96 and 120h by the quercetin with different concentrations (30, 60, 90μmol/L). Results We verified the results that quercetin with concentration of 30 ～90μmol/L could successfully inhibit the expression of mutant p53 protein, but the mutant p53 gene did not have. ConclusionThat data suggested that quercetin would be an effective method for the therapy of leukemia.

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Objective This study is aimed to assess the accuracy of clinical measurement of remission and investigate the association between clinical remission and the ultrasound imaging assessment of synovitis and infla'mation and to explore the value of ultrasound imaging in the evaluation of disease activity in the tight control of rheumatoid arthritis (RA).Methods RA patients with a disease activity score in 28 joints (DAS28-ESR) ≤2.6 for at least 3 months were stratified-using a standard and more stringent DAS28 and simplified disease activity index (SDAI) remission thresholds and the corresponding clinical and ultrasound imaging measures of synovitis were recorded.In addition,a retrospective analysis of disease activity in patients was carried out.Mann-Whitney U test,x2 test and multi-factor analysis of variance of repeated measurements were used for statistical analysis.Results A total of 48 cases were recruited.Thirty-seven cases (77％) met the ACR remission criteria,29 cases (60％) fulfilled the SDAI remission criteria,and 32 (67％) cases reached 2010 ACR/EULAR Boolean-based definition of remission criteria.There was no significant differences on imaging disease activity between SDAI remission patients and those who were not in remission (GS score,P=0.38; PD score,P=0.32).Seventy-nine percent patients in SDAI remission had GS and/or PD activity,but the difference was not statistically different when compared with patients who did not reach SDAI remission (P=0.29).Sustainable remission obtained in patients who also had achieved image remission could have longer remission time (P＜0.01) Conclusion Using more stringent clinical remission criteria could help in reducing residual inflammatory activity of,but ultrasound PD activities may not be significantly reduced.Integrated clinical indicators such as physical examination and imaging tools such as ultrasound can provide more accurate assessment of disease activity and could be used to guide treatment to achieve trueremission.

Adult ; Aged ; Antineoplastic Combined Chemotherapy Protocols ; therapeutic use ; Cisplatin ; administration & dosage ; Deoxycytidine ; administration & dosage ; analogs & derivatives ; Female ; Humans ; Lymphoma, T-Cell ; drug therapy ; pathology ; Male ; Methylprednisolone Hemisuccinate ; administration & dosage ; Middle Aged ; Neoplasm Recurrence, Local ; drug therapy ; Remission Induction

The RAS (rat sarcoma) gene is one of the important oncogenes, and its mutation is present in about 30% human tumors. KRAS (kirsten rat sarcoma viral oncogene) is one of the three RAS subtypes, and KRAS mutations are more common than the mutations in other two RAS subtypes. In recent years, with the continuous research, new ideas have been provided for the treatment of cancers via targeting-KRAS. Efforts have been made to develop various KRAS inhibitors. Here, based on the mechanism of action, we classified KRAS inhibitors into two categories: inhibitors that directly target KRAS and inhibitors that indirectly act on KRAS. The representative KRAS inhibitors were summarized and introduced in this paper.

Rotavirus capsid protein Vp4 plays an important role in the virus adhering and entering the cells. In this study, a Vp4 gene cloned from a rotavirus strain TB-Chen was highly expressed in E.coli BL21 (DE3). The results of the Western blot showed that the protein possesses specific immuno-reactivities and can be specifically recognized by guinea pig antibodies against rotavirus strain SA11 or Wa. Some Vp4 dimers were formed during renaturation. These data obtained from this study provide a strong basis for further study on the structure and function of the Vp4.

Glioblastoma is a malignant tumor in central nervous system, which has strong invasion, poor prognosis and short survival time. At present, the main treatment strategy of glioblastoma is surgical excision, supplemented by radiotherapy and chemotherapy. However, due to incomplete resection and high recurrence rate, it is urgent to find novel therapeutic method for glioblastoma. Photodynamic therapy, as a promising non-surgical treatment, provides a new strategy for postoperative adjuvant therapy of glioblastoma. This review summarizes the mechanism and clinical application of photodynamic therapy mediated by various photosensitizers in glioblastoma, in order to provide help for the treatment of glioblastoma.

Objective To investigate the prevalence of integrons in A.baumannii isolates,analyze the correlation between inte- grons and resistance of A.baumannii,and study the resistance genes in integrons.Methods A total of 106 strains of A.bau- mannii were collected to test the antibiotic susceptibility by disk diffusion method.The classification of integrons was per- formed by analyzing the positive PCR products using restriction fragment length polymorphism (RFLP).The variable region of integrons was amplified by integron PCR.RFLP and DNA sequencing were used to analyze the resistance genes in integrons. Results About 52.8% (56/106) of the isolates showed integron positive.PCR-RFLP analysis revealed that they were all class I integrons.About 94.6%(53/56) of the positive strains with integrons owned the variable region,which was confirmed by integron PCR.The sizes of the amplicons ranged from 0.15 kb to 2.8 kb.All together 7 different cassette arrays were detec- ted,including genes coding resistance to aminoglycosides (aadA1,aadA2,aadA5,aadB,aacA4),sulphonamides (dfrⅫ, dfr17),?-lactam compounds (bla_(ara-10)),chloramphenicol (catB-like,catB8),and two open reading frames (orfF,orfI) with unknown function.A novel cassette array orfI-aadA1 was reported,and its GenBank accession number was DQ092497.Conclu- sions Class I integrons are widespread in A.baumannii isolates in Nanjing.The integrons are closely associated with the resist- ance and multidrug resistance in A.baumannii isolates.

OBJECTIVETo explore the mechanism of polypeptide extract from scorpion venom (PESV) on inhibiting angiogenesis.

METHODSThe H22 hepatoma tumor model was established by subcutaneously implanting H22 hepatoma cells into mice. The tumor-bearing mice were randomly divided into 4 groups, i.e., the control group, the high dose PESV group, the low dose PESV group, and the 5-fluorouracil (5-Fu) group, 10 mice in each group. The intervention was lasted for 14 days. The growth curve of the tumor volume was drawn and the inhibition rate calculated. Pathological changes of the tumors were observed by HE staining. The microvessel density (MVD) was detected using SP method. The protein expression levels of phosphatidylinositol 3-kinase (P13K), phosphoprotein kinase B (P-Akt), hypoxia-inducible factor-1 alpha (HIF-1 )alpha, and vascular endothelial growth factor-A (VEGF-A) were detected by immunohistochemical assay and Western blot.

RESULTSThe tumor inhibitory rate was 64.8%, 43.7%, and 32.4% in the 5-Fu group, the high dose PESV group, and the low dose PESV group. Compared with the control group, the protein expression of PI3K, P-Akt, HIF-1alpha, and VEGF-A were obviously inhibited by PESV and 5-Fu (P <0. 05,P <0. 01). The MVD also decreased in the high and low dose PESV groups (P < 0.05).

CONCLUSIONSPESV could inhibit the angiogenesis of H22 hepatoma. The mechanisms might be associated with suppressing the expression of PI3K, P-Akt, HIF-1 alpha, and VEGF-A.

Angiogenesis Inhibitors ; pharmacology ; Animals ; Cell Line, Tumor ; Fluorouracil ; pharmacology ; Hypoxia-Inducible Factor 1, alpha Subunit ; metabolism ; Liver Neoplasms ; Male ; Mice ; Peptides ; pharmacology ; Phosphatidylinositol 3-Kinases ; metabolism ; Proto-Oncogene Proteins c-akt ; metabolism ; Scorpion Venoms ; pharmacology ; Vascular Endothelial Growth Factor A