Objective To analyze the clinical value of microRNAs applied in the early diagnosis of pancreatic cancer.Methods The expression of mir-155,mir-196a,mir-181a,mir-181b in three pancreatic cancer cell lines PANC-1,PaCa-2,AsPC-1 pancreatic cancer,normal pancreatic cells and plasmas of 100 patients with pancreatic cancer ,100 normal volunteers were detected by Real-time PCR,and the results were analyzed.The expression of mir-155,mir-196a,mir-181a,mir-181b in 100 pancreatic cancer tissues and 100 normal pancreatic tissues were detected by immunohistochemical,and the results were analyzed. Results Real-timePCR test results showed that compared with normal pancreatic cells,mir-155,mir-196a expression in three pancreatic cancer cells PANC-1,PaCa-2,AsPC-1 were significantly increased(P<0.05).Compared with healthy volunteers,mir-155,mir-196a,mir-181a,mir-181b expression of plasma in pancreatic cancer patients were significantly higher(P<0.05).Immunohistochemistry results showed that mir-155,mir-196a mir-181a and mir-181b expression in pancreatic tissue were significantly higher than that in normal pancreatic tissue (P <0.05 ).Conclusion The expression of mir-155,mir-196a,mir-181a and mir-181b are high in pancreatic cancer tissues and pancreatic cancer cell lines,which are closely related to the development of pancreatic cancer.Those microRNAs are expected to be cancer markers for early diagnosis of,pancreatic cancer,have highly diagnostic value and broad clinical application.

Objective To invesgate hepatitis B c antigen(HBeAg)as the carrier to construct mixed hepatitis C virus(HCV)therapeutic vaccine.Methods Fused the pTrc-core gene with two synthetic T-epitope antigen gene of HCV,expressed the plasmids pTrc-core-T1 and pTrc-core-T2, applied sucrose density gradient centrifugation to get the fusion protein HBcAg-T1 and HBcAg-T2, dialysised and concentrated the protein,mixed and immunized them in mice using the protein HBcAg (expressed by pTrc-core)as control.The tumor regression trial in mice was evaluated at appropriate time.After immunized four times,got the blood and spleen of mice.Interleukin(IL)-12 in serum were detected by enzyme-linked immunosorbent assay(ELISA),nonspecific T lymphocytes prolifera- tion response of splenic lymphocytes was respectively examined by thiazolyl blue(MTT)assay.T cell subset of splenic lymphoeytes,IL-5 in serum,IL-4 and interferon(IFN)-?in lymphocyte were evalu- ated by FACS.Results Tumor regression trial showed the experimental group formed only one tumor(diameter=0.1 cm),smaller than the T_1T_2 peptides group(diameter=0.9 cm)and blank group(diameter=1.3 cm).FACS indicated that CD8~+ T cell percentage of spleen cells from HBcAg- T_1T_2 group(20.21?2.01)% was higher than T_1T_2 peptides group(15.33?1.45)% and blank group(5.09?1.66)%,the percentage of IFN-?positive cells in these three groups were(1.58?0.05)%,(0.88?0.02)% and(0.53?0.03)%.The ELISA discovered that the level of IL-12 in the experimental group was the highest.Different from above,the IL-4 and IL-5 were lower in the exper- imental group.The detection of eytotoxic T lymphocyte(CTL)activity showed that the quantity of Hela cells infected by HCV in HBcAg-T1T2 stimulated group was different obviously from T1T2 peptides group. Conclusion The mixed protein HBcAg-T1 and HBcAg-T2 can induce stronger cellular immunity and it is able to serve as a therapeutic vaccines candidate specific for HCV.

Female ; Humans ; Hyperthyroidism ; drug therapy ; etiology ; Infant, Newborn ; Male

This study examined the effect of small interfering RNA-mediated β-catenin knockdown on the survival, invasion and chemosensitivity of human osteosarcoma cells (U2-OS cells). The siRNA against β-catenin was constructed and transfected into U2-OS cells. The expression of β-catenin was detected by qRT-PCR and Western blotting. Cell growth and apoptosis was detected in the presence or absence of doxorubicin by MTT and flow cytometry, respectively. Cell invasion ability was measured by transwell assay. The results showed that the transfection of β-catenin siRNA resulted in decreased expression of β-catenin, suppression of invasion and motility of U2-OS cells, reduced chemosensitivity to doxorubicin in vitro, and little change in cell growth and apoptosis. Additionally, down-regulated MT1-MMP expression was found after transfection. It was concluded that knockdown of β-catenin gene may decrease the invasive ability of human osteosarcoma cells through down-regulated MT1-MMP expression, and the chemosensitivity of osteosarcoma cells against doxorubicin.

In this article,the oral medicine laboratory teaching of non-oral medicine international students was analyzed and summarized. Teaching plan should be made in accordance with the aptitude of students and goal of training. We used many teaching methods such as multimedia teaching,demonstration with teeth in vitro,etc and acquired good teaching effects. It gives us many experiences for the future teaching.

Objective To study the effects of cripto on migration, invasion, and liver metastasis of colorectal cancer cell. Methods After human colorectal cancer cell line SW480 was transfected by cripto small interfering RNA (siRNA), the mRNA and protein level were determined by Real-time RT-PCR and Western blot, respectively. The migration and invasion ability were evaluated by wound-healing assay and boyden chamber model, respectively. Thirty nude mice model of liver metastasis from colorectal cancer was established by splenectomy. Results The siRNA could down-regulate the level of mRNA and protein of cripto in a dose- and time-dependent manner. Suppression of cripto expression could inhibit migration and invasion ability of human colorectal cancer cell in vitro. The metastastic rate and tumor nodules were lower in transfection with cripto siRNA than in two control groups in vivo. Conclusions Cripto gene might play an important role in regulation of liver metastasis from colorectal carcinoma cell, and suppression of cripto gene by siRNA can inhibit liver metastasis of colorectal cancer.

Objective To investigate the resistance-related genes of Shigella sonnei with decreased susceptibility to fluoroquinolones.MethodsA total of 131 strains of Shigella sonnei were analyzed for their antimicrobial susceptibility.Mutations within the quinolone resistance determining regions (QRDR) of gyrA and parC were detected by polymerase chain reaction (PCR) and PCR products were then sequenced. Meanwhile, the plasmid-mediated quinolone resistance (PMQR) genes,qnr and aac(6')-Ib-cr were screened by PCR.ResultsResistance rates of 131 Shigella sonnei isolates to nalidixic acid,tetracycline,ampicillin and trimethoprim-sulfamethoxazole were 100.0％,93.9％,93.2％ and 92.8％,respectively.All strains were susceptible to norfloxacin,ciprofloxacin,levofloxacin,while 94％ nalidixic acid-resistant Shigella sonnei strains showed reduced susceptibilities to fluoroquinolones.All of nalidixic acid-resistant Shigella sonnei strains presented a single mutation at codon 83 (Ser→Leu) of gyrA genes,but no mutations were detected in parC gene.And PMQR genes qnr and aac (6’)-Ib-cr were not detected.Conclusions The nalidixic acid-resistant Shigella sonnei strains with reduced susceptibility to fluoroquinolones are common in the clinical practice,which may mainly due to a single mutation at codon 83 (Ser→Leu) of gyrA genes.

10.3969/j.issn.2095-4344.2013.24.008

Objective To explore the relationship between iesion location ot the frst onset acute cerebral infarction(ACI),stroke severity and post-stroke depression (PSD).Methods The lesion Iocations of ACI were observed by CT or MRI.100 patients with the first onset ACI were assessed by Hamilton Depression Scale and the National Institutes of Health Stroke Scale two weeks after stroke.Results There was no significant difference in the incidence of PSD among the patients with left,right and bilateral lesions in acute stroke(23.91％,25.00％,33.33％,x2 =0.2512,P ＞0.05 ).The incidence of PSD had significant difference between the anterior-circulation and posterior-circulation infarction(33.96％,14.89％,x2 =4.8307,P ＜ 0.05 ).Stroke severity was positively correlated withthe incidence of PSD( 16.67％,31.37％,36.36％,x2 =3.9188,P ＜ 0.05 ).Conclusion The incidence of PSD was no significant correlation with the stroke site of patients with the first onset ACI,and the patients with anterior circulation infarction and severe neurological deficit have high incidence of PSD.

Objective To analyze the Doppler indices of uterine artery at 11-16 weeks normal gestation. Methods Two hundred and ninty-seven normal pregnant women were consecutively recruited to take routine ultrasound examination at 11-16 weeks' gestation. According to gestational week, they were divided into 6 groups (11-11+6 weeks, 12-12+6 weeks, 13-13+6 weeks, 14-14+6 weeks, 15-15+6 weeks, 16-16+6 weeks). According to the location of placenta, they were divided into 3 groups (central placenta, right placenta, left placenta). Finally, the pregnant women were divided into 5 groups (RI<0.60 group, 0.60-0.69 group, 0.70-0.79 group, 0.80-0.85 group and ≥ 0.85 group) according to resistance index (RI). Doppler indices of uterine artery were measured in each case. Results (1) The PIm, RIm, S/Dm values (the mean PI, RI, S/D values of bilateral uterine artery) were decreased with the progress of pregnancy, but the difference of the RIm, S/Dm were not significant. Only the decrease of PIm after 15 weeks was significant (P<0.05). The mean PIm of each group was:11 weeks 1.96±0.39, 12 weeks 1.94±0.45, 13 weeks 1.79±0.43, 14 weeks 1.79±0.36, 15 weeks 1.51±0.43, 16 weeks 1.50±0.30. (2) The PI, RI, S/D values of uterine artery with placenta attached were lower than the other side. In the left placenta group, bilateral RI difference was-0.04 (t=-3.095, P=0.005), bilateral PI difference was -0.24 (t=-3.232, P=0.004), bilateral S/D difference was-1.00 (t=-2.965, P=0.007);in the right placenta group, bilateral RI difference was 0.04 (t=6.159, P=0.000), bilateral PI difference was 0.43 (t=6.614, P=0.000), bilateral S/D difference was 2.05 (t=6.378, P=0.000);in the middle placenta group, bilateral RI difference was 0.02 (t=4.150, P=0.000), bilateral PI difference was 0.14 (t=4.475, P=0.000), bilateral S/D differencewas 0.54 (t=4.376, P=0.000). (3) According to the RI, incidence rates ofα-notch detected:in<0.60 group both sides were 0;in 0.60-0.69 group, left uterine artery was 0.08, right uterine artery was 0.08;in 0.70-0.79 group, left uterine artery was 0.34, right uterine artery was 0.31;in 0.80-0.85 group, left uterine artery was 0.65, right uterine artery was 0.72;in≥0.85 group, left uterine artery was 0.81, right uterine artery was 0.87. Conclusion The uterine artery Doppler indices of 11-16 weeks maybe a reliable and non-invasive method for examining uteroplacental perfusion.