Protective effect of pinocembrin from Penthorum chinense Pursh on hepatic ischemia reperfusion injury via regulating HMGB1/TLR4 signal pathway

Hepatic ischemia–reperfusion injury (HIRI) is of common occurrence during liver surgery and transplantation. Pinocembrin (PIN) is a kind of flavonoid monomer extracted from the local traditional Chinese medicine Penthorum chinense Pursh (P. chinense). However, the effect of PIN on HIRI has not determined. We investigated the protective effect and potential mechanism of PIN against HIRI. Model mice were subjected to partial liver ischemia for 60 min, experimental mice were pretreated with PIN orally for 7 days, and H₂O₂-induced oxidative damage model in AML12 hepatic cells was established in vitro. Histopathologic analysis and serum biochemical levels revealed that PIN had hepatoprotective activities against HIRI. The variation of GSH, SOD, MDA, and ROS levels indicated that PIN treatments attenuated oxidative stress in tissue. PIN pretreatment obviously ameliorated apoptosis, and restrained the expression of HMGB1 and TLR4 in vivo. In vitro, compared with H₂O₂ group, the contents of ROS, mitochondrial membrane potential, apoptotic cells, and Bcl-2 protein were decreased, while the Bax protein expression was increased. Moreover, HMGB-1 small interfering RNA test and western blotting showed that PIN pretreatment reduced HMGB1 and TLR4 protein levels. In conclusion, PIN pretreatment effectively protected hepatocytes from HIRI and inhibited the HMGB1/TLR4 signaling pathway.     

甲状腺肿的专家诊断与咨询系统

本文通过对１７４８３例甲状腺肿大中五种甲状腺病病例的收集、分析、整理、统计与提炼，确定了诊断原则，建立了知识库、病例库和正反双向混合推理机制，完成了用Ｔｕｒｂｏ－Ｐｒｏｌｏｇ语言编制。采用适用于表示医学产生式知识表示方法所开发的专家诊断与咨询系统，为教学、临床工作及家庭保健提供了有价值的软件。经临床病例验证，该软件准确、可靠、有很强的实用价值，对人工智能的研究、临床及教学的现代化，提高人们的保健水     

99mTc-DTPA气溶胶显像测定呼吸道粘液纤毛清除功能

为进一步研究呼吸道疾病时的粘液纤毛清除功能,采用99mTc-DTPA气溶胶吸入显像,通过电影显示定性和定量指标分析.对18 例健康受试者和患者进行了显像研究,得到气道清除率和粘液纤毛清除率的正常值,并观察了32例慢性阻塞性肺病(COPD)患者气管-支气管纤毛清除功能的改变.结果显示,健康受试者与COPD患者粘液纤毛清除率(mm/min)分别为3.89±0.92和1.32±0.59,两者比较有显著性差异(P＜0.01),COPD患者不同时间气道清除率和粘液纤毛清除率均明显低于健康受试者(P＜0.01).本研究方法简便客观,具有定性观察和定量分析的优点,对于呼吸系统其它疾病(如支气管扩张、原发性纤毛无运动)的研究及药物疗效的评价具有重要的临床实用价值.     

甲状腺切除病例喉返神经损伤的分析

目的：研究甲状腺切除术的主要并发症－－喉返神经（ＲＬＮ）麻痹的相关因素。方法：回顾性研究１５６３例甲状腺手术患者的临床资料,重点分析ＲＬＮ损伤与术式、ＲＬＮ在术中是否被分离保护以及与甲状腺疾病的病理关系。结果：ＲＬＮ损伤率是７．８％,与组织病理恶性程度明显相关（Ｐ〈０．０１）,但术中如明确找到ＲＬＮ并加以保护,术后则无ＲＬＮ永外性损害,暂时麻痹仅１．６％。结论：术中对ＲＬＮ的保护应该强调避免医源性     

侧颅底肿瘤手术入路(附44例报告)

目的:探讨切除侧颅底肿瘤的最佳入路.方法:44例患者中,采用下颌外旋入路17例,耳后C形切口入路16例,上颌外旋入路7例,颞额入路4例.结果:25例良性肿瘤术后无复发;19例恶性肿瘤中,术后生存不足1年2例,1年以上4例,2年以上7例,3年以上6例.结论:下颌外旋入路适用于切除咽旁间隙、颞下窝、鼻咽部、口咽部、蝶骨、斜坡及上颈椎肿瘤;耳后C形切口入路适用于切除颞骨肿瘤.     

Screening and identification of 3-aryl-quinolin-2-one derivatives as antiviral agents against influenza A

Quinolin-2-one represents an important and valuable chemical motif that possesses a wide variety of biological activities; however, the anti-influenza activities of quinolin-2-one-containing compounds were rarely reported. Herein, we describe the screening and identification of 3-aryl-quinolin-2-one derivatives as a novel class of antiviral agents. The 3-aryl-quinolinone derivatives were synthesized via an efficient copper-catalyzed reaction cascade that we previously developed. Using this synthetic method, preliminary structure–activity relationships of this scaffold against the influenza A virus infection were systematically explored. The most potent compound 34 displayed IC₅₀ values of 2.14 and 4.88 μM against the replication of H3N2 (A/HK/8/68) and H1N1 (A/WSN/33) strains, respectively, without apparent cytotoxicity on MDCK cells. We further demonstrated that 27 and 34 potently inhibited the plaque formation of the IAV, rendering this scaffold attractive for pursuing novel anti-influenza agents.     

原发性高血压肝阳上亢证,肝肾阴虚证患者动态血压分析

对６２例原发性高血压肝阳上亢证、肝肾阴虚证病人正常活动状态下２４ｈ血压进行动态监测,分析两证型的血压变化规律。结果显示肝阳上亢证组血压呈昼高夜低、肝肾阴虚证组血压呈昼低夜高的规律性变化,表明２４ｈ动态血压监测值可作为原发必高血压辨证分型的客观指标之一。     

社区老年高血压病人健康教育近期效果评价

为了解在社区老年高血压患者中进行的联合型健康教育活动的近期效果,作者重复调查了健教组社区老年人有关高血压“知-信-行”的状况,与基线和对照组的情况进行了比较分析。结果表明：本次联合型的健康教育活动使健教组在高血压的相关知识、信念、行为方面均有一定的改善。作者还对这项联合型健康教育活动的可行性及存在的问题进行了讨论。总结了本次研究的体会,并指出了进一步提高这项活动效率、效果的工作重点和建议。