一种基于ELISA检测氮芥诱导的MGMT-DNA交联体的方法

目的 建立一种基于酶联免疫吸附法检测O6-烷基转移酶(O6-Methylguanine-DNA methyltransferase,MGMT)与DNA的交联体(MGMT-DNA crosslink,M-DPC)含量的简便方法.方法 整合当前技术提取及纯化M-DPC、定量M-DPC样品中dsDNA含量、优化DPC中抗原在ELISA板的包被能力等关键环节.以不同浓度氮芥处理人支气管上皮细胞HBE,在指定的时间收集细胞,使用细胞核抽提/裂解/Tris饱和酚回收法制备M-DPC样品.采用SYBR Green Ⅰ染色方法对M-DPC样品中dsDNA进行定量.采用全能核酸酶对M-DPC样品中脱氧核糖核酸降解,以增强M-DPC样品中抗原在ELISA板的包被能力.最终,包被后的多孔板检测采用常规的ELISA.结果 无需高速离心机和放射性同位素等,使用常规方法提取了细胞M-DPC.SYBR Green Ⅰ检测基因组dsDNA的线性范围为2 ng至1.5 μg,可以用于提取的M-DPC所含dsDNA的定量,据此统一样本用量.M-DPC可以通过ELISA检出,且在一定范围内有线性关系.氮芥染毒3h后M-DPC含量有显著增加,且对氮芥剂量有依赖.至24 h M-DPC含量无显著降低.结论 所建立的ELISA检测M-DPC的方法快速、经济、灵敏、高通量,也可应用于部分其他交联蛋白的检测.氮芥染毒所致M-DPC形成有时间和剂量效应.     

缺氧对大鼠下丘脑Ⅰ型大麻素受体表达和摄食量的影响

目的 研究缺氧大鼠下丘脑Ⅰ型大麻素受体(cannabinoid receptor type Ⅰ,CB1)的表达变化及其与摄食量的关系.方法 54只雄性SD大鼠按随机数字表法分为3组(每组18只):平原对照组、缺氧1d组和缺氧7d组.缺氧组大鼠置模拟海拔5000m低压舱中,平原对照组大鼠置平原饲养.记录各组大鼠摄食量,蛋白免疫印迹法和免疫组化法观察各组大鼠下丘脑CB1受体和c-Fos蛋白表达变化.结果 与平原对照组[(15.5±2.7)g]大鼠相比,缺氧1d组大鼠摄食量[(4.9±0.7)g]显著减少(P＜0.05),同时大鼠下丘脑CB1和c-Fos阳性细胞数量和蛋白表达量显著减少;缺氧1d组大鼠弓状核(arcuate nucleus,ARC)、下丘脑腹外侧区(later hypothalamic area,LH)和下丘脑腹内侧核(ventromedial hypothalamic nucleus,VMH)CB1受体、c-Fos表达较平原对照组显著降低;随着缺氧时间的延长,动物摄食量逐日增加,缺氧3～7d时的摄食量与平原对照组大鼠相当;缺氧7d组大鼠下丘脑CB1受体和c-Fos阳性细胞数量和蛋白表达量与平原对照组大鼠比较,差异无统计学意义(P＞0.05).结论 急性缺氧大鼠摄食减少可能与弓状核、下丘脑腹外侧区和下丘脑腹内侧核CB1受体和c-Fos表达减少相关.     

The vial kit formulation for preparation of no‐carrier‐added 131I‐MIBG

We have developed a new set of lyophilized kits, composed of 3 different kits, for the instant preparation of no‐carrier‐added ¹³¹I‐MIBG in the clinic. We here discussed the formulation of the kits, optimization of radiolabelling, quality control of radiolabeled ¹³¹I‐MIBG, and studies of animal biodistribution. The no‐carrier‐added (nca) ¹³¹I‐MIBG injection could be prepared within 30 minutes in the clinic with the help of the lyophilized kits. The radiochemical purity and specific activity (SA) could achieve above 98% and 6700 MBq/mg, respectively.     

Coincidence of infectious osteomyelitis and disseminated neuroblastoma: A diagnostic dilemma solved by scintigraphic imaging

Summary The case of a 41/2-year-old girl with disseminated neuroblastoma and concomitant osteomyelitis is reported. Neuroblastoma was detected in the vertebral column, the right suprarenal fossa, the left side of cranium and in bone marrow aspirates. Osteomyelitis was present in the left femur and was due to Salmonella tennessee. For the first time in the literature the two lesions were demonstrated by means of simultaneous ¹³¹I-MIBG and ^99mTc-DPD scintigraphy. The diagnoses were proved by direct histological and microbiological studies.     

131I联合碳酸锂治疗复杂Graves病探讨

目的 探讨131I联合碳酸锂治疗复杂Graves病的作用及安全性.方法 回顾性分析131I联合碳酸锂治疗的70例Graves病合并肝功能损害、白细胞减少、房颤等患者的资料（联合组）.以同期的单用131I治疗的70例Graves病患者的资料为对照组,比较治疗后1个月、3个月、6个月时的效果.结果 联合组取得很好疗效,而且比对照组更早改善症状.结论 碳酸锂可以解决甲亢患者131I治疗时遇到的许多难题,因而131I联合碳酸锂治疗Graves病应该受到重视.     

上颌Le Fort Ⅰ前徙术与前份根尖下截骨后退术术后软组织变化的比较研究

目的 测量不同上颌骨正颌术式前后鼻唇区域软组织变化,分析可能导致变化的因素。方法 2017—2021年于四川大学华西口腔医院正颌及关节外科住院行正颌手术的患者37例,其中因上颌后缩行上颌骨Le Fort Ⅰ型骨切开前徙术（LFIA）的患者18例,因上颌前突行上颌骨前份根尖下截骨后退术（AMOS）的患者19例。收集其术前即刻和术后6～12个月的螺旋CT影像,通过Mimics和3-Matic软件进行三维重建和匹配,测量软硬组织标志点变化。使用GraphPad Prism软件进行统计学分析,显著性水平α=0.05。结果 2种术式术后最主要的软组织变化均发生在上唇区域且改变方向与骨组织移动方向相同。在前后向软组织改变上,LFIA组软硬组织改变的比例为0.628,而AMOS组为0.465。颊部和鼻尖软组织在2种术式后均发生了前移,其中AMDS组中颊部软组织前移的量与软组织厚度的改变具有显著正相关性。在垂直向软组织变化上,LFIA组鼻尖点发生上抬且其距离与颌骨前徙距离具有显著正相关性,AMOS组上唇缘点发生下降且其距离与颌骨后退距离具有显著正相关性。在水平向软组织变化上,鼻翼宽度在行2种术式后均出...     

3类新型慢性唾液腺炎的诊断和治疗

Some kinds of chronic sialadenitis were recognized during the recent years. They have specific pathogenesis, clinical and histopathologic appearances, and require specific treatment. IgG4-related sialadenitis (IgG4-RS) is one of the immune-mediated diseases, characterized by tumefactive lesions. The incidence of IgG4-RS obviously increased during the past 30 years. The study on the potential relationship between occupational exposure to chemical substances and the incidence of IgG4-RS showed that subjects with occupational exposure to agents known to cause IgG4-RD had an increased risk for IgG4-RS. Surgical excision of involved SMG could not control the disease progression, which is not recommended for treatment of IgG4-RS. The combination of glucocorticoid and steroid-sparing agents is effective for treating IgG4-RS, and restores salivary gland function. Radioiodine induced sialadenitis (RAIS) is one of the common complications of postoperative adjuvant treatment of differentiated thyroid cancer by ¹³¹I. The incidence of the disease is related to radiation dosage. Clinically, the patients suffered from swelling and tenderness in the buccal or submandibular regions, especially during the mealtime. Imaging appearances are similar to those of chronic obstructive sialadenitis. Conservative managements, such as gland massage, sialagogues, are the mainstream methods in the treatment of RAIS. Sialendoscopy is feasible for RAIS, but not as effective as conventional obstructive sialadenitis (COS). Therefore the prevention of RAIS is crucial. Eosinophilic sialodochitis (ES) is a new type of chronic inflammatory disease of the salivary gland related to allergy. It has characteristics of swelling of multiple major salivary glands, strip-like gelatinous plugs discharged from the duct orifice of the gland, elevated level of serum IgE and eosinophils in peripheral blood, infiltration of eosinophils and IgE positive plasma cells in the tissues, allergic history, increased expression of allergy-related cytokines, such as IL-4, IL-5, IL-13, and eotaxin, which suggest allergic reactions as a potential pathogenesis of the disease. The clinical, laboratory, histological, and immunohistochemical characteristics of ES are significantly different from conventional obstructive sialadenitis (COS). Therefore, it is suitable to separate ES from COS. Conservative managements, such as self-maintenance therapy and anti- allergic modality are the choices of treatment for ES. Based on the results of our comprehensive studies a new classification of chronic sialadenitis is suggested.     

界线类偏瘤型麻风伴I型麻风反应一例

患者,男,27岁。全身水肿性红斑、斑丘疹伴痛,高热1周。组织液抗酸染色查菌BI 3.40。组织病理检查示：表皮变薄,表真皮间无浸润带,真皮内成团淋巴细胞、组织细胞、泡沫细胞等浸润,累及脂肪层和附属器。2年前患者曾诊断为BL麻风,抗麻风联合化疗治疗1年。     

曾庆琪教授经验方前列腺炎Ⅰ号

目的：对前列腺炎Ⅰ号进行分析评判,以分析曾庆琪教授治疗慢性前列腺炎的特点,供临床参考.方法：简要介绍曾庆琪教授对慢性前列腺炎的认识,对前列腺炎Ⅰ号进行辨析,并介绍典型病案.结果：前列腺炎Ⅰ号的适应证与慢性前列腺炎的主要病因病机相符,组方合理,疗效确切.结论：前列腺炎Ⅰ号在慢性前列腺炎的治疗上具有一定推广应用价值.     

α7神经型尼古丁受体激动剂PNU282987对APP/PS1小鼠海马组织中DYN-Ⅰ蛋白表达的影响

目的研究特异性激动APP/PS1转基因小鼠脑组织中α7神经型尼古丁受体(α7 nAChR)水平后对海马组织DYN-Ⅰ蛋白的影响;探讨α7 nAChR在阿尔茨海默病(Alzheimer disease,AD)发病机制中的神经保护作用机制。方法实验动物分为对照组(Control)、野生加PNU282987组(WP)、APP/PS1转基因组(APP/PS1)和APP/PS1加PNU282987组(AP)各8只,WP和AP组给予α7 nAChRs特异性激动剂PNU-282987,另两组给予生理盐水,给药方式为小鼠24 w龄时1 mg/kg腹腔注射PNU-282987,连续5 d。采用Real-time PCR法和蛋白免疫印迹(Western Blot)法分别测定小鼠海马组织中发动蛋白Ⅰ(DYN-Ⅰ)mRNA和蛋白表达水平的变化。结果与control组相比,APP/PS1组海马组织中发动蛋白Ⅰ(DYN-Ⅰ)mRNA和蛋白水平下降(P0.05,P0.01);而特异性激动α7 nAChR水平后,与对照组相比WP组中发动蛋白Ⅰ(DYN-Ⅰ)mRNA和蛋白水平升高(P0.05,P0.01);与APP/PS1组相比AP组小鼠大脑海马组织中发动蛋白Ⅰ(DYN-Ⅰ)mRNA和蛋白水平明显升高(P0.01,P0.01)。结论特异性激动APP/PS1转基因小鼠海马组织中α7 nAChR水平能够使网格蛋白内吞调节蛋白DYN-Ⅰ表达升高。这可能提示了α7 nAChR对突触有一定的保护作用,进一步说明α7 nAChR在阿尔茨海默病的发病中起着重要作用。