Fractionated carbon dioxide (CO2) laser treatment contributes to trans-nail penetration of rhodamine B and changes of cytokine microenvironment

Lasers in Medical Science - This study is to determine the role of the fractional CO2 laser in topical drug delivery and the impact of local immune responses. Experimental rabbit nails were treated...     

新型重组人肿瘤坏死因子对大鼠肝细胞及小鼠肝组织中钙稳度的影响

目的;研究新型重组人肿瘤坏死因子（ｒｈＴＮＦ－ＮＣ）对培养大鼠肝细胞内游离Ｃａ＾２＋浓度（「Ｃａ＾２＋」ｉ）及小鼠肝组织中Ｃａ６２＋含量的影响。方法：以Ｆｕｒａ－２／ＡＭ为Ｃａ＾２＋荧光检测,荧光分光光度法测定培养大鼠肝细胞内「Ｃａ＾２＋」ｉ;原子吸收分光光度法测定小鼠肝组织中Ｃａ＾２＋含量。结果：在加入ｒｈＴＮＦ－ＮＣ ３ｈ后,可剂量依赖性地引起培养大鼠肝细胞内「Ｃａ＾２＋」ｉ显著升高。     

黄芪、莪术配伍对胃癌细胞COX-2表达的调节作用

目的:观察黄芪、莪术配伍对MKN-45细胞COX-2、PPlAR-Y、NF-KB的影响.方法:以黄芪、莪术配伍作用于MKN-45细胞,并设塞莱希布组、罗格列酮组、黄芪组、莪术组和空白组相对照.用MTT法观察各组药物对胃癌细胞的抑制率,用RT-PCR以及Western blot方法检测给药后人胃癌细胞COX-2、PPARy、NF-KB基因及COX-2蛋白表达的变化.结果:各组对COX-2和NF-KB的mRNA表达均有抑制作用,除莪术外对PPARy mRNA均有促表达作用,其中以塞莱希布组和配伍组对COX-2 mRNA表达的抑制作用最为明显,且配伍组作用明显强于黄芪组和莪术组,以罗格列酮组和配伍组对NF-KB mRNA的表达抑制作用和对PPARy表达的促表达作用都是最明显.结论:黄芪、莪术配伍能起到增效作用,对细胞的抑制效应明显,对COX-2的抑制作用大于黄芪、莪术的单独效应,与塞莱希布相近,其对COX-2的抑制作用可能是通过PPARy/NFKB信号途径发挥作用的.     

Construction of pETNF-P16 plasmid and its expression properties in EC9706 cell line induced by X-ray irradiation

AIM: Recombined plasmid pETNF-P16 was constructed to investigate its expression properties in esophageal squamous carcinoma cell line EC9706 induced by X-ray irradiation and the feasibility of gene-radiotherapy for esophageal carcinoma. METHODS: Recombined plasmid pETNF-P16 was constructed and transfected into EC9706 cells with lipofectamine. ELISA,Western blot, and immunocytochemistry were performedto determine the expression properties of pETNF-P16 in EC9706 after transfection induced by X-ray irradiation. RESULTS: Eukaryotic expression vector pETNF-P16 was successfully constructed and transfected into EC9706 cells. TNFα expressions were significantly increased in the transfected cells after different doses of X-ray irradiation than in those after 0Gy irradiation (1 192.330-2 026.518 pg/mL,P<0.05-0.01), and the TNFα expressions and P16 were significantly higher 6-48 h after 2 Gy X-ray irradiation (358.963-585.571 pg/mL, P<0.05-0.001). No P16 expression was detected in normal EC9706 cells. However, there was strong expression in the transfected and irradiation groups. CONCLUSION: X-ray irradiation induction could significantly enhance TNFα and P16 expression in EC9706 cells transfected with pETNF-P16 plasmid. These results may provide important experimental data and therapeutic potential for gene-radiotherapy of esophageal carcinoma.     

基于数字化三维重建的跟骨关节内骨折分型的初步应用

目的　探讨数字化虚拟可视技术在跟骨关节内骨折分型的可行性与价值。 方法　17例跟骨关节内骨折患者CT扫描数据集导入相应软件,重建跟骨骨折三维可视模型。2名高年资骨科医师,在规定时间内完成对每例跟骨骨折的三维数字化分型和sander分型评估,使用Kapppa值计算相关度,比较两种分型的可信度差别。 结果　重建了15个跟骨骨折的数字化三维可视模型,准确地反映了跟骨骨折的解剖部位、骨折移位的方向和程度,数字分型的可信度Kapppa值为0.795(0.691~0.874),属于可信程度,　sander分型的Kapppa值为0.641（0.591~0.701）,属于基本可信程度。 结论　基于数字化三维重建的跟骨骨折的分型直观明了,具有较高的可信度、为临床诊治方式的选择提供了更为精准的影像学依据。     

Studies on the integration of hepatitis B virus DNA sequence in human sperm chromosomes

Aim: To study the integration of hepatitis B virus (HBV) DNA into sperm chromosomes in hepatitis B patients and the features of its integration. Methods: Sperm chromosomes of 14 subjects (5 healthy controls and 9 HB patients, including 1 acute hepatitis B, 2 chronic active hepatitis B, 4 chronic persistent hepatitis B, 2 HBsAg chronic carriers with no clinical symptoms) were prepared using interspecific in vitro fertilization between zona-free hamster oocytes and human spermatozoa. Fluorescence in situ hybridization (FISH) to sperm chromosome spreads was carried out with biotin-labeled full length HBV DNA probe to detect the specific HBV DNA sequences in the sperm chromosomes. Results: Specific fluorescent signal spots for HBV DNA were seen in sperm chromosomes of one patient with chronic persistent hepatitis B. In 9(9/42) sperm chromosome complements containing fluorescent signal spots, one presented 5 obvious FISH spots and the others 2 to 4 signals. The fluorescence intensity showed significant diffe     

Expression properties of recombinant pEgr-P16 plasmid in esophageal squamous cell carcinoma induced by ionizing irradiation

AIM: To construct the recombinant pEgr-P16 plasmid for the investigation of its expression properties in esophageal squamous cell carcinoma induced by ionizing irradiation and the feasibility of gene-radiotherapy for esophageal carcinoma. METHODS: The recombinant pEgr-P16 plasmid was constructed and transfected into EC9706 cells with lipofectamine. Western blot, quantitative RT-PCR and flow cytometry were performed to study the expression of pEgr-P16 in EC9706 cells and the biological characteristics of EC9706 cell line after transfection induced by ionizing irradiation. RESULTS: The eukaryotic expression vector pEgr-P16 was successfully constructed and transfected into EC9706 cells. The expression of P16 was significantly increased in the transfected cells after irradiation while the transfected cells were not induced by ionizing irradiation. The induction of apoptosis in transfection plus irradiation group was higher than that in plasmid alone or irradiation alone. CONCLUSION: The combination of pEgr-P16 and irradiation could significantly enhance the P16 expression property and markedly induce apoptosis in EC9706 cells. These results may lay an important experimental basis for gene radiotherapy for esophageal carcinoma.     

Gynura root induces hepatic veno-occlusive disease： A case report and review of the literature

Gynura root has been used extensively in Chinese folk medicine and plays a role in promoting microcirculation and relieving pain.However,its hepatic toxicity should not be neglected.Recently,we admitted a 62-year old female who developed hepatic veno-occlusive disease(HVOD)after ingestion of Gynura root.Only a few articles on HVOD induced by Gynura root have been reported in the literature.It is suspected that pyrrolizidine alkaloids in Gynura root might be responsible for HVOD.In this paper,we report a case of HVOD and review the literature.     

Characterization of EST-derived microsatellite loci in Saruma henryi Oliv., an endangered Chinese endemic herb

Saruma henryi Oliv. is an endangered perennial herb endemic to China, and possesses high phylogenetic, ecological and medicinal values. In this study, 12 polymorphic microsatellite markers were developed from publicly available expressed sequence tags (ESTs) of S. henryi. Analysis of 24 individuals from a single population showed that the number of alleles varied between 2 and 5, with an average of 3.42 per locus. However, when they were assayed against individuals from multiple populations, this value ascended to between 7 and 10, with an average of 8.42 per locus. The observed and expected heterozygosities ranged from 0.2500 to 0.7500 and from 0.4028 to 0.7648, respectively. The low within-population genetic variability (number of alleles per locus) can be attributed to the clonal growth and the predominantly selfing breeding system in this species. In addition, their cross-taxa transferability was evaluated in two cofamilial species, and polymorphic products were detected. These informative EST-derived microsatellite markers can be readily used for genetic analyses of S. henryi and related taxa.     

Ceramide induces apoptosis in human lung adenocarcinoma A549 cells through mitogen-activated protein kinases

AIM: To provide experimental data for further research on the signal transduction of apoptosis in lung adenocarcinoma cells, we examined the effects of exogenous C2-ceramide administration on several members of the mitogen-activated protein kinase (MAPK) superfamily and caspase-3 in A549 cells. METHODS: Cell viability and apoptosis were analyzed by cell counting kit-8 assay and flow cytometry. Various MAPK and caspase-3 proteins were detected by Western blotting. RESULTS: C2-ceramide selectively altered the phosphorylation state of members of the MAPK superfamily, causing hyperphosphorylation of mitogen-activated protein kinase kinase (MEK)1/2 and the p38 MAPK, but not affecting the phosphorylation of extracellular signal-regulated kinase 1/2 and the c-Jun N-terminal kinase. SB-203580 (a p38 MAPK inhibitor) and p38 siRNA, but not U0126 (a MEK inhibitor), partially rescued cell death induced by C2-ceramide. C2-ceramide promoted the activation of caspase-3. CONCLUSION: Exogenous C2-ceramide induced apoptosis in human lung adenocarcinoma A549 cells. The activation of MAPK and caspase-3 were involved in the mechanisms of C2-ceramide-induced apoptosis in A549 cells.