Sex difference in cellular proliferation within the telencephalic ventricle zone of Bengalese finch

Cellular proliferation within the ventricular zone (VZ) may contribute to sex differences through the net addition of neurons in song control nuclei. To address this issue, we administered [(3)H]thymidine to Bengalese finches of both sexes, and estradiol benzoate (EB) to females 15 days post hatching. The birds were killed 2h later to examine thymidine labeled cells within the VZ at three brain levels, HVC, anterior commissure and Area X. Our results indicated that: (1) cell proliferation in the VZ was significantly higher in the three studied brain levels in males and EB implant females relative to intact or empty implant females, respectively; (2) proliferation in the dorsal half of the VZ, in proximity to HVC, was notably higher than that in the ventral half of the VZ; (3) proliferation in the ventral VZ (VVZ), which is relatively close to Area X was higher relative to other subregions of VZ (dorsal and intermediate). Our study suggests that sex differences in cell proliferation in the VZ may contribute to the net growth of HVC and Area X in males, and estradiol may play an important role in sexual difference in cellular proliferation within the VZ.     

Xp11.2易位/TFE3基因融合相关性肾癌的病理特征与临床分析

目的探讨Xp11．2易位／TFE3基因融合相关性肾癌的临床病理特征、免疫表型、鉴别诊断及预后。方法对11例Xp11．2易位／TFE3基因融合相关性肾癌进行光镜观察和免疫组织化学研究及随访10～112个月,并复习相关文献。结果11例肿瘤中女性7例,男性4例。年龄8～26岁,平均16、3岁。肿块直径2．5～6．0cm。光镜下癌组织呈两种结构,一种为腺管状、乳头状、巢状分布。细胞界限清楚,有大量透明或嗜酸性胞质。泡状染色质、核仁明显,沙砾体多见。另一种结构更加紧密,多见实性巢状结构,癌细胞缺乏大量的胞质,核仁不明显,沙砾体少见。免疫表型：本组11例均TFE3、CD10、a-甲酰基-CoA消旋酶（P504s）弥漫表达,细胞广谱角蛋白（CK—pan）、上皮细胞膜抗原（EMA）、波形蛋白仅部分病例表达,所有病例CK7、肾脏特异性钙黏蛋白（Ksp—cadherin）、CD117阴性表达。结论Xp11．2易位／TFE3基因融合相关性肾癌是一种少见肿瘤,诊断主要依据患者的年龄。病理学形态和免疫组织化学TFE3阳性。     

Biological evaluation of selected 3,4‐dihydro‐2(1H)‐quinoxalinones and 3,4‐dihydro‐1,4‐benzoxazin‐2‐ones: Molecular docking study

In order to investigate new potential therapeutically active agents, we investigated the biological properties of two small libraries of quinoxalinones and 1,4‐benzoxazin‐2‐ones. The results obtained showed that compounds 5 , 9–11 have good cytotoxic activity against HeLa cells where the lowest IC₅₀ value (10.46 ± 0.82 μM/mL) was measured for compound 10 . Additionally, the most active compounds ( 5 , 9 – 11 ) showed much better selectivity for MRC‐5 cells (up to 17.4) compared to cisplatin. In vitro evaluation of the inhibition of the enzyme α‐glucosidase showed that compounds 10 and 11 exert significant inhibition of the enzyme at 52.54 ± 0.09 and 40.09 ± 0.49 μM, respectively. Competitive experiments with ethidium bromide (EB) indicated that all tested compounds have affinity to displace EB from the EB‐DNA complex through intercalation, suggesting good competition with EB (K_sv = (3.1 ± 0.2), (5.1 ± 0.1), (5.6 ± 0.2), and (6.3 ± 0.2) × 10³ M^?1). A molecular docking study was also performed to better understand the binding modes and to conclude the structure–activity relationships of the synthesized compounds.

     

模糊物元模型评价当归不同提取部位的活血作用

目的：筛选当归活血的有效部位;探讨模糊物元模型在当归不同提取部位活血效果综合评价中的应用。方法：以皮下注射盐酸肾上腺素结合冰水浴建立急性大鼠血瘀模型,通过检测血液流变学及凝血4项[凝血酶原时间（PT）,活化部分凝血活酶时间（APTT）和凝血酶时间（TT）,纤维蛋白原含量（FIB）]指标,评价当归不同提取部位的活血效果;运用基于变异系数权重的模糊物元模型对活血的效果进行综合评价。结果：部位1~7均能降低大鼠全血黏度和血浆黏度,部位2能明显延长PT、TT时间（P<0.05）。反映活血总效应的最大贴进度值为0.527（70%乙醇浸渍部位）。结论：70%乙醇浸渍部位为当归活血的有效部位;基于变异系数权重的模糊物元模型可客观、准确地评价当归不同提取部位活血的综合效果。