Animals ; Gene Expression ; Mice ; Mice, Inbred Strains ; Spinal Cord ; metabolism ; Spinal Cord Injuries ; genetics ; metabolism ; p21-Activated Kinases ; genetics

Objective To evaluate CT imaging and pathological features of maxillofacial malignant myoepithelioma (MME). Methods A total of eight patients with pathologically confirmed MME of the maxillofacial region were underwent non-enhanced and contrast-enhanced CT scans.CT features of the lesions were assessed as follows:location,number,shape,size,enhancement pattern and CT number on non-enhanced and contrast-enhanced scan.CT features were compared with the pathological results.Results All the lesions were unilateral,in which mixed type with clear cells and spindle cells in 5 cases,mixed type with epithelioid cells and plas-ma cells in 2 cases,and clear cell type in one case.8 cases were manifested as lobulated mass.On non-enhanced scan,the density of all the lesions were hetergeneous with cystic area,1 case with calcification and 2 cases with bone destruction.On the contrast-en-hanced CT,all the lesions were showed hetergeneously moderate or obvious enhancement,and cystic,line and crack areas without the enhancement were observed.Minor vessel and spiculate protuberance of marginal zone on the arterial phase were observed in most le-sions.Conclusion MME has different pathological subtypes and characteristic CT features.CT is an effective method to diagnose MME.

Objective:To investigate the role of celecoxib in inhibiting liver cancer and to explore the potential molecular mech-anisms.Methods:A total of 65 cases of patients with primary hepatocellular carcinoma(HCC) underwent surgical treatment in our hospital from February 2012 to June 2016 were recruited as study object.Another 15 cases of normal liver tissue offered by the department of hepatobiliary surgery were selected as control.Immunohistochemical staining(IHC) was used to detect the expression level of COX-2 and PD-1 in tumor and normal tissue samples.Pearson correlation analysis were used to evaluate the correlation between COX-2 and PD-1 in HCC patients.Construction of H22 hepatoma cells bearing BALB/c mice model,randomly divided them into control group,celecoxib group and PD-1 antibody group(15 mice for each group).Sacrificed all mice alive at the end of the 4th weeks after the treatment and removed the tumors then.The tumor growth curves and survival curves were drawn to observe the anti-tumor effect.IHC were used to evaluate the expression of COX-2,PD-1 as well as the number of CD8+T and foxp3 positive Treg cells in tumor tissue.Flow cytometry were used to determine the number of CD8+T and CD4+CD25+Treg cells in peripheral blood.The peripheral blood mononuclear cell(PBMC) of BALB/c mice were separated and scramble or PD-1 siRNA were transfected then,Western blot analysis were used to detected the level of COX-2,PD-1,CD8 and Foxp3 after the treatment of celecoxib.Results:IHC results showed that the expression level of COX-2 and PD-1 in tumor tissue of HCC patients were significant higher than control(P<0.001).Pearson correlation analysis showed COX-2 were both positive correlated with PD-1 in the tumor tissue of HCC patients(R2=0.673,P<0.001).The tumor growth curves and survival curves in celecoxib or PD-1 antibody groups were significant better than in control group (P<0.05).There were no significant difference of tumor growth curves and survival curves between celecoxib group and PD-1 antibody group(P>0.05).IHC and flow cytometry analysis showed that celecoxib treatment significant decreased the expression level of PD-1(P<0.05).Both celecoxib and PD-1 antibody treatment significant increased the number of CD8+T cells while decreased the number of Treg cells in the tissue or the peripheral blood(P<0.05).Western blot analysis showed that celecoxib significant decreased the level of COX-2,PD-1,CD8 and Foxp3 in PBMCs,while it did not affect the level of CD8 and Foxp3 in PD-1 siRNA transfected PBMCs.Conclusion:The expression level of COX-2 and PD-1 were increased in the tumor tissue of HCC patients.Celecoxib may inhibit liver cancer by regulating PD-1 mediated tumor immune via inhibiting COX-2.

The most toxic DNA damage is DNA double strand breaks (DSBs), which are mainly repaired by non-homologous end joining (NHEJ). DNA-dependent protein kinase (DNA-PK) belongs to phosphatidylinositol-3-kinase-related protein kinase family (PIKK) and plays a key role in NHEJ. DNA-PK is overexpressed in a variety of cancer cells and is related to the occurrence, development and drug resistance of malignant tumors. In this article, the representative DNA-PK inhibitors with anticancer effects are reviewed, in order to provide a reference to discovery novel DNA-PK inhibitors.

OBJECTIVETo explore the value of phase ordering with automatic window selection(PAWS)and simultaneous multiple volume(SMV)algorithm double respiratory navigator-gated two-dimensional(2DNAV)dual inversion recovery(DIR)fast spin echo(FSE)high-resolution black-blood coronary artery wall magnetic resonance imaging(MRI)and evaluate its advantages and limitations.

METHODSPAWS and SMV 2DNAV DIR FSE high-resolution black-blood MRI was performed in 21 healthy volunteers. The images were evaluated qualitatively by using four grades(grade 0can not evaluate;grade 1bad;grade 2good;grade 3perfect). Images defined as grade 0 and grade 1 were excluded and those defined as grade 2 and 3 were evaluated further. Thickness of proximal(or middle)segment of right coronary artery(RCA)and left anterior descending branch(LAD)were measured. The difference of wall thickness was analyzed by using two-tailed independent sample t-test. P values of less than 0.05 were considered statistically significant.

RESULTSAmong the 38 slice images,31 slices(RCA13 slices,LAD18 slices;grade 214 slices,grade 317 slices)were obtained for further evaluation. The mean thickness of RCA and LAD was(0.94±0.16)and(0.89±0.15)mm,respectively,and the difference was not significant(t=-0.790,P>0.05).

CONCLUSIONPAWS and SMV algorithm 2DNAV DIR FSE high-resolution black-blood MRI has certain clinical value for coronary artery wall imaging.

Adult ; Coronary Vessels ; anatomy & histology ; Female ; Humans ; Magnetic Resonance Imaging ; methods ; Male ; Middle Aged ; Young Adult

Objective To investigate the level and influencing factors of PICC catheter patients' willingness to participate in patient safety. Methods A total of 198 PICC catheter patients were sampled from the targeted hospital by convenience sampling,and investigated by the Patient Participate Patient Safety Willingness and Behavior Scale ( PSWBS). Results The PSWBS score of PICC catheter patients was 3.73 ± 0.52 , including initiative willingness 4.13 ± 0.54, initiative tendency 3.82 ± 0.49, attention for technique level 3.70 ± 0.50, attention for environmental safety 3.27 ± 0.48. Among these factors, age(F=14.75, P<0.01), education degree(F=9.588, P<0.01), occupation(25.070, P<0.01), residence(t=8.570, P<0.01)and complications(t=8.880, P<0.01)were the influencing facts with statistical difference (P<0.05) . Conclusions Most of the patients have a high willingness to participate in patient safety , the distribution of impact factors have certain characteristics. Clinical nurses should take targeted nursing measures according to these different characteristics.

Objective:To investigate the effects of estradiol on ~(60)Co?-ray induced apoptosis of bone marrow hematopoietic cells of mice,and to discuss the related anti-irradiation mechanism.Methods:KM mice were randomly divided into 3 groups(15 mice/each group):control group(without radiation),pure radiation group and estradiol+radiation group(ER group).The pure radiation group was irradiated by 4.0 Gy?-ray at a dose rate of 1.15Gy/min;the ER group was administered with 0.1 mg estradiol(IM)at 10 days before 4.0 Gy?-ray radiation;and the control group received no special treatment.The apoptotic DNA segments of bone marrow hematopoietic cells were analyzed by DNA agarose gel electrophoresis;flow cytometry was used to examine the apoptosis rate of cells and expression of Fas and Bcl-2 at 4 h,8 h,and 12 h after irradiation.Results:Eight hours after radiation,the apoptotic DNA segments were obviously increased and apoptotic DNA ladder appeared,which was not seen in the other 2 groups.The apoptosis rate of bone marrow hematopoietic cells in ER group was significantly lower than that in the pure radiation group at 4,8,and 12 h after irradiation(P

OBJECTIVETo evaluate the RT-PCR-ELISA method applied for testing live attenuated hepatitis A vaccine titer.

METHODSA solid phase hybridization-enzyme colorimetric detection method was used for detecting specific nucleic acid. Primer labeled with biotin was used to amplify viral gene fragment, then the product was quickly hybridized with the specific probe covalently coupled on DNA-binding microplate wells. Finally, peroxidase-labeled streptavidin was used in colorimetric detection. The results were judged by reading A value. Eleven batches of live attenuated hepatitis A vaccine titer were tested by this method. The results were compared with that of routine cell culture method (CCID50).

RESULTSThe sensitivity was similar to routine cell culture method (P>0.05). This method was convenient, fast and specific.

CONCLUSIONCCID50 method may be replaced by the RT-PCR-ELISA method in evaluating the titer of live attenuated hepatitis A vaccine.

Base Sequence ; DNA, Viral ; analysis ; Enzyme-Linked Immunosorbent Assay ; Genes, Viral ; Hepatitis A Vaccines ; Hepatitis A virus ; genetics ; Quality Control ; Reverse Transcriptase Polymerase Chain Reaction ; Sensitivity and Specificity ; Vaccines, Attenuated

Female ; Gastroscopy ; Humans ; Infant ; Intestinal Obstruction ; diagnosis ; therapy ; Treatment Outcome

Abstract: Our previous work revealed berberine can significantly enhance the susceptibility of fluconazole against fluconazole-resistant Candida albicans, which suggested that berberine has synergistic antifungal activity with fluconazole. Preliminary SAR of berberine needs to be studied for the possibility of investigating its target and SAR, improving its drug-likeness, and exploring new scaffold. In this work, 13-substitutited benzyl berberine derivatives and N-benzyl isoquinoline analogues were synthesized and characterized by 1H NMR and MS. Their synergetic activity with fluconazole against fluconazole-resistant Candida albicans was evaluated in vitro. The 13-substitutited benzyl berberine derivatives 1a-1e exhibited comparable activity to berberine, which suggested that the introduction of functional groups to C-13 can maintain its activity. The N-benzyl isoquinolines, which were designed as analogues of berberine with its D ring opened, exhibited lower activity than berberine. However, compound 2b, 2c, and 4b showed moderate activity, which indicated that berberine may be deconstructed to new scaffold with synergistic antifungal activity with fluconazole. The results of our research may be helpful to the SAR studies on its other biological activities.
Antifungal Agents ; pharmacology ; Berberine ; pharmacology ; Candida albicans ; drug effects ; Drug Resistance, Fungal ; Drug Synergism ; Fluconazole ; pharmacology ; Isoquinolines ; pharmacology ; Microbial Sensitivity Tests