Affects and personality: A study with university students

Objective

Analyze the relation between both these variables (affects and personality).

Imaging features of intrahepatic cholangiocarcinoma in Gd-EOB-DTPA-enhanced MRI

Objective

The aim of this study is to describe the imaging features of intrahepatic cholangiocarcinoma in Gd-EOB-DTPA-enhanced MRI and to determine whether it results in improved tumour conspicuity of cholangiocarcinoma.

Materials and methods

Fifty-four patients with histologically proven intrahepatic cholangiocarcinoma underwent MRI of the liver using a 1.5 T MR-scanner with Gadoxetic acid disodium (Gd-EOB-DTPA; Eovist/Primovist, Bayer Healthcare, Berlin, Germany). The standard imaging protocol included a T2w multi-shot TSE sequence with fat saturation (fs), a T2w single shot sequence without fs and a T1w 3D GRE sequences with fs (unenhanced and arterial, portovenous, late venous and hepatobiliary phase). Two board certified radiologists experienced in liver MRI (5 and 10 years experience) evaluated retrospectively all MRI scans qualitatively and quantitatively. Signal was measured with region-of-interests (ROI) and signal-to-noise (SNR) as well as contrast-to-noise (CNR) was calculated. Statistical significance was tested with an ANOVA and a pairwise Wilcoxon rank test.

Results

All intrahepatic cholangiocarcinomas presented as hypointense lesions in the late venous and hepatobiliary phase. Images in the hepatobiliary phase showed the highest lesion conspicuity, i.e. n = 9 blurred (16.6%), n = 31 moderate (57.4%) and n = 14 sharp (26%). This was significantly higher than the lesion conspicuity of all other sequences or phases. Furthermore, the CNR was the highest in this sequence with 76.8 ± 51.3, with significantly higher values than the CNR of the unenhanced T1w sequence (CNR: 35.6 ± 21.0; p < 0.0001) and the arterial phase images (CNR: 53.6 ± 36.8; p < 0.001). The hepatobiliary phase images showed a SNR of 97.3 ± 59.7 (p < 0.001) and thus was significantly different from the unenhanced T1w sequence (SNR: 60.4 ± 35.3; p < 0.001), whereas the increase in SNR from the late venous to hepatobiliary phase was neglectable, indicating that no liver-specific contrast uptake is present in cholangiocarcinoma.

Conclusion

Intrahepatic cholangiocarcinoma presents as a hypointense lesion in Gd-EOB-DTPA-enhanced MRI in late venous phase images. The lesion conspicuity as well as CNR was highest in the hepatobiliary phase. Consequently, hepatobiliary phase images in Gd-EOB-DTPA-enhanced MRI images might be helpful for therapy planning due to the exact depiction of the tumour borders.     

院内制剂肝利泰片质量定性的研究

目的：肝利泰片具有清热解毒,凉血化瘀,能降低肝脏转氨酶的功效,十分适合我院专科使用。为发挥特色医院制剂,对肝利泰片的制备方法进行改进,制剂质量标准重新进行修订。方法：按照中医君臣佐使理论,合理组方,结合现代制药技术制备肝利泰片,建立性状、鉴别、检查等质量标准。结果：肝利泰片各项质量标准符合药典项下有关规定,鉴别试验重现性好,操作简便、易行。结论：新修订的制剂制备方法可行,质量稳定,质量标准符合药典规范。     

促结缔组织增生型成釉细胞瘤细胞的体外培养与鉴定

目的：观察体外培养的促结缔组织增生型成釉细胞瘤细胞的生长特点。方法：对促结缔组织增生型成釉细胞瘤细胞用酶消化法进行体外培养，免疫组化证实其细胞来源，以倒置显微镜观察细胞形态及生长情况．并用流式细胞仪分析细胞周期，MTT法绘制细胞生长曲线。结果：促结缔组织增生型成釉细胞瘤为上皮来源，细胞在体外培养过程中包含2种形态的细胞，与实性成釉细胞瘤细胞在体外培养相比，存在较多梭形细胞，细胞生长缓慢，培养的各代细胞未见异倍体。结论：促结缔组织增生型成釉细胞瘤细胞在体外培养过程中包含较多的梭形细胞．可能与其较多的细胞间质有关。     

Establishment and characterization of a novel HPV-negative laryngeal squamous cell carcinoma cell line,FD-LSC-1, with missense and nonsense mutations of TP53 in the DNA-binding domain

Laryngeal squamous cell carcinoma (LSCC) is a common malignancy in China; however, publically available LSCC cell lines are few and not established from Chinese populations. Hence, novel and well-characterized LSCC cell lines of Chinese origin are urgently needed to provide researchers with a comprehensive database for LSCC research. From 40 cases of LSCC, we established a novel cell line that was maintained for more than 100 passages in vitro and was found to have typical epithelial morphology and ultrastructure. In-depth characterization analysis revealed polyploidy in DNA content; a doubling time of some 24 h; high tumorigenicity in immunodeficient mice; higher invasive potential and more sensitive to radiation and cisplatin compared with HeLa cell line; upregulated Ki67, Notch1, EGFR, and CK5 protein levels; negative infection of human papillomavirus (HPV) and mycoplasma; expression of head and neck squamous cell carcinoma (HNSCC) biomarkers; mutations of TP53 in exons 5 and 8; a near-triploid karyotype with complex structural aberrations; and dozens of dysregulated genes and miRNAs. Cell authentication testing by the American Type Culture Collection (ATCC) confirmed the human origin of this cell line. Our findings indicate that a novel and well-differentiated LSCC cell line recapitulating the primary tumor’s malignant characteristics is established and well characterized. It does not match any cell lines within the ATCC database and helps to elucidate the molecular pathogenesis of LSCC.     

Establishment and characterization of pheochromocytoma tumor models expressing different levels of trkA receptors

To date experimental in vivo pheochromocytoma (PC) models have not been available. A major in vitro PC model consists of PC12 cells that respond to nerve growth factor (NGF) by differentiation, mediated by the trkA receptor. We report the establishment of PC12 tumor models expressing low and high levels of trkA receptor in CD1 nude mice. The tumors are characterized by their responsiveness to NGF, karyotype, presence of enolase, and chromaffin granules, as well as dopamine release. These novel PC models facilitate research on the role of the trkA receptor in cancer and the development of trkA-selective anti-cancer agents.     

Characterization of Allergens in Mango Fruit and Ripening Dependence of the Allergenic Potency

The topic of the present paper is the detection of IgE-related allergens in mango fruit. Furthermore the occurrence of allergens during ripening of mango fruit is investigated. In order to identify the molecular weights of IgE-binding allergens SDS-PAGE/immunoblotting was performed. Fifty-two sera from patients with IgE-mediated sensitization to mango fruit were used. Forty-six of the 52 patient sera detected two allergens with molecular weights of approximately 40 and 30 kDa. These can be described as the so-called major allergens. Other IgE-binding patterns were detected for fewer than 50% of the assigned sera. By 2D-electrophoresis it could be proved that the major allergen with a molecular weight of approximately 40 kDa exists as an isoallergen with isoelectric points of 4.6 and 4.8. The allergen with a molecular weight of approximately 30 kDa had an isoelectric point of 4.9. According to international rules, the 40 kDa allergen was named Mangifera indica 1 (Man i 1) and the 30 kDa allergen , Mangifera indica 2 (Man i 2). By means of SDS-PAGE/ immunoblotting, immunoblot inhibition and EAST-inhibition it could be shown that there is no significant difference in the allergenic potency during fruit ripening.     

牙科修复用BiOIO3/g-C3N4复合纳米光催化剂的制备与表征

目的 研究不同剂量NaOH条件对制备BiOIO3/g-C3N4复合纳米光催化剂的结构形貌及其可吸收光谱的影响,为研制适用于口腔修复纳米光催化功能性材料提供依据.方法 水热法制备BiOIO3/g-C3N4,通过XRD(X射线衍射仪)、SEM(扫描电镜图)和UV-vis(紫外-可见光吸收光谱)对其形貌、结构、分子组成和理化...     

Collagen from Turkey (Meleagris gallopavo) tendon: A promising sustainable biomaterial for pharmaceutical use

Collagen is the major fibrillar component and protein in both human and animal connective tissue. It is applied in medical preparations, e.g. wound dressings and tissue engineering. Meat and poultry production industries result in large amounts of organic waste, rich in collagen. Our aim was to isolate and characterize pepsin soluble collagen from turkey tendon. Structural analysis indicated the presence of α-chains from both collagen type I and III, β-dimers and γ-trimers, consistent with the estimated molecular weight of 477.3 kDa. Circular dichroism spectroscopy confirmed an intact triple helix. The collagen demonstrated excellent thermal stability, with denaturation temperatures (T_max) at 38.5 °C and 44.5 °C and partial refolding after extensive heating. Biocompatibility was confirmed through cell viability tests. The collagen was investigated for its potential drug carrier ability. Freeze dried collagen scaffolds containing prilocaine hydrochloride and riboflavin were prepared in the presence or absence of photo-crosslinking. Photochemical crosslinking was confirmed by SEM and enhanced mechanical properties were observed. Scaffolds had a significant slower in vitro release of the active ingredient than a reference solution. Altogether, our study suggests collagen from turkey tendon as a promising sustainable biomaterial for pharmaceutical use.