禽腺病毒是全球家禽常见的传染病病原之一,目前对禽腺病毒进行流行病学调查,已给全球家禽业造成了巨大的经济损失.为了调查禽腺病毒在湖北地区的流行情况,在2021～2022年从湖北市场收集了224份鸡肝样本,为FAdV疫苗研制提供参考.基因测序结果显示:其中14株携带FAdV,Hexon L1环基因序列系统发育,12株为C型,2株为D型.在鸡肝癌细胞株(LMH)中培养并分离得到FAdV-11 HB200株,对分离物的Hexon基因进行了扩增和测序.遗传进化分析表明:FAdV-11 HB200与多个FAdV-11毒株处于同一分支.FAdV-C的流行率仍然占主导地位,相关部门应采取预防FAdV感染的措施.

Superoxide dismutase (SOD) is an antioxidant enzyme with multiple metal cofactors that can specifically clear reactive oxygen species (ROS), which plays an important role in a variety of ultraviolet-induced lesions. Therefore, SOD has the anti-ultraviolet radiation effect. The objective of this study was to compare the differences in the anti-ultraviolet radiation effect of SOD with distinct metal cofactors: Cu/Zn-SOD and Mn-SOD. SOD was first purified using hydrophobic interaction chromatography and ion-exchange chromatography. Second, the Methylthiazolyldiphenyl-tetrazolium bromide method and cell senescence kits were used to study the protective effect of SOD on ultraviolet-induced cell damage. Finally, the protective effect of SOD on ultraviolet -induced skin damage was histopathologically evaluated, and the expression levels of malondialdehyde (MDA) and matrix metalloproteinases (MMPs) in tissues were detected. The results showed that Cu/Zn-SOD was superior to Mn-SOD in promoting cell proliferation, alleviating cell damage, protecting skin structure, and regulating the expression levels of MDA and MMPs, and it has no side effects. In conclusion, Cu/Zn-SOD had a better anti-ultraviolet radiation effect than Mn-SOD, and it can be used in anti-aging and anti-ultraviolet skin-care products.

制备禽腺病毒4型(FAdV-4)Fiber2蛋白的特异性单克隆抗体,将重组蛋白FAdV-4 Fiber2纯化后作为免疫原免疫BALB/c小鼠,分离脾脏中的淋巴细胞,与小鼠骨髓瘤细胞SP2/0进行融合,筛选得到10株能稳定分泌抗FAdV-4 Fiber2蛋白单克隆抗体的阳性杂交瘤细胞株1B5F1、1B5G11、1B5C1、1B5D2、1B5E3、1B5F3、1B5E4、1B5G4、1B5A8、1B5G8,取分泌抗体水平最高的1B5F1细胞株制备腹水,利用斑点杂交(Dot blot)和间接免疫荧光试验(IFA)进行特异性检测.结果表明,成功制备10株杂交瘤细胞株;制备的腹水能与FAdV-4 Fiber2蛋白及FAdV-4攻毒后的鸡肝组织产生特异性反应,证明成功制备了FAdV-4 Fiber2蛋白特异性单克隆抗体.

为了考察氟苯尼考与磺胺间甲氧嘧啶配伍后对药效的影响,本试验参照美国临床实验室标准化研究所(CLSI)制定的肉汤稀释法,研究了氟苯尼考与磺胺间甲氧嘧啶单独使用对大肠杆菌、沙门氏菌、金黄色葡萄球菌三种常见病原菌的体外抑制效果,并用棋盘稀释法验证两药联合使用后的相互影响.结果表明,氟苯尼考和磺胺间甲氧嘧啶单独使用时对三株菌的最小抑菌浓度(MIC)分别为5μg/mL和160μg/mL,二者联用后的部分抑菌指数(FIC)大于0.5且小于等于1,表现为相加作用,证明二者在临床上配伍具有一定的合理性.