Characterization and distribution of [3H]ohmefentanyl binding sites in the human brain

Binding properties and localization of [3H]ohmefentanyl, a new ligand for mu opioid receptors, were investigated on normal human brain sections. Binding assays performed at the level of the basal ganglia revealed: (1) a steady-state binding reached after 60 min incubation at room temperature, (2) the presence, in saturation experiments, of an apparent single class of binding sites with a Kd = 1.68 +/- 0.45 nM and a Bmax = 162 +/- 9 fmol/mg protein, (3) an order of potency to inhibit [3H]ohmefentanyl binding as follows: ohmefentanyl greater than [D-Ala2, MePhe4, Gly-ol5] enkephalin (DAGO) greater than ethylketocyclazocine (EKC) much greater than Tyr-D-Ser(OtBu)-Gly-Phe-Leu-Thr(OtBu) (BUBU) and U-50,488H. Quantitative autoradiography showed an heterogeneous distribution of [3H]ohmefentanyl binding sites with the highest densities in amygdala, medical geniculate body, thalamus, and caudate nucleus. Binding characteristics and anatomical distribution also show that [3H]ohmefentanyl may bind to a small proportion of additional sites called "DAGO-inaccessible [3H]ohmefentanyl specific binding sites." [3H]Ohmefentanyl binding to these sites can be partly inhibited by sigma ligands such as 1,3-di-o-tolylguanidine (DTG) and haloperidol. However, unlabeled DAGO inhibited more than 80% of [3H]ohmefentanyl specific binding in most of the human brain regions studied, suggesting that the major population of sites labeled by [3H]ohmefentanyl represented mu opioid receptors.     

恙虫病63例临床分析

目的 为了进一步了解恙虫病的临床特点。方法 对63例恙虫病的临床资料进行回顾性分析。结果 所有病例均有持续较长时间的发热并伴不同程度的毒血症，出现焦痂溃疡60例(95％)，淋巴结肿大40例(63％)，皮疹32例(51％)，两个以上脏器损害48例(76％)，多器官功能衰竭7例(11％)；白细胞计数正常或偏低者占70％。及时使用特效抗生素治疗有良效。结论 著虫病的临床表现多样化，早期诊断和及时治疗对预后十分重要。     

自制中药粉剂中盐酸小檗碱的定量检测方法

目的测定自制中药粉剂中盐酸小檗碱的含量。方法采用薄层扫描法测定了盐酸小檗碱的含量。结果盐酸小檗碱在1～6μg间呈良好的线性关系,r=0.9975,平均回收率为97.95%,RSD为2.36%(n=5)。结论所建立的方法可靠准确地进行定量检测,可用于该制剂的质量控制。     

Comparison of Radiographic and pQCT Analyses of Healing Rat Tibial Fractures

Fracture healing and callus formation have traditionally been evaluated by using X-ray radiography. Here we compared X-ray radiography and peripheral quantitative computed tomography (pQCT) in evaluating the healing callus of standardized tibial fractures in 141 female rats after a 4- or 8-week follow-up. The results were compared with the tensile (4-week) and compressive (8-week) failure load of the callus. The projectional size of callus, as defined from lateral ex vivo radiographs, correlated significantly with the pQCT-defined cross-sectional area (CSA) of mid-callus. This relationship was dependent on the pQCT attenuation threshold, being higher for the CSA of compact bone (r = 0.85, P < 0.0001) than for the total bone CSA (r = 0.68, P < 0.0001). Radiographically defined callus projectional area also correlated strongly with bone mineral content (BMC) (r = 0.84–0.86, P < 0.0001). The mean optical density of the callus analyzed from the radiographs had only a weak correlation with the pQCT-defined bone mineral density (BMD) of callus. A weak negative relationship was found between CSA and BMD. The optical density analyzed from lateral radiographs did not correlate with the tensile or compressive failure load of callus. Callus size, BMC, and BMD were associated with the compressive failure load, whereas both radiographs and pQCT were poor in explaining the failure load in tension. Received: 28 June 1999 / Accepted: 28 October 1999     

性病后非病原体性症状的临床分析

目的了解性病后非病原体性症状的性质特点。方法采用临床会谈、心理咨询、SCL—90、SAS、SOS等相关量表调查测评。结果纳入分析病人134例，首诊均作实验室检查培养，病原体检出率为零，体格检查无器质性病变，符合非病原体性症状诊断。结论此类“症状”实质上是患者因患性病导致心理障碍面出现的综合症，而“症状”并无器质性及病原体因素，医务人员应更新观念，提高自身素质解除患者心理障碍。     

加压溶剂提取-高效薄层扫描法测定三七中皂苷类成分

目的：建立加压溶剂提取-高效薄层扫描法测定三七中皂苷类成分含量的方法。方法：采用加压溶剂提取三七中皂苷类成分，高效薄层扫描进行含量测定，使用高效薄层板、半自动点样、自动展开，10％硫酸乙醇液显色，光密度扫描，测定波长534am，参比波长700nm。结果：人参皂苷Rb1、Rd、Rg1和三七皂苷R1的线性范围为：0．402～2．010,μg(r=0．9995)；0．154～1．275,μg(r=0．9965)；0．198～1．980,μg(r=0．9998)和0．156～1．400,μg(r=0．9978)，回收率在95．3～99．3％之间。结论：高效薄层扫描法可同时测定三七中的人参皂苷Rb1、Rd、Rg1和三七皂苷R1。     

食管癌淋巴结转移的临床病理因素分析

目的:探讨食管癌淋巴结转移的临床病理相关因素.方法:对326例食管癌根治性手术病例进行统计,分析各主要临床病理改变与淋巴结转移的关系.结果:326例食管癌中淋巴结转移149例,转移率为45.7%.病变长度≤3cm、3.1～5cm、5.1～7cm、7.1～9cm和＞9cm的淋巴结转移率分别为28.6%、30.1%、51.4%、65.5%和73.7%.组织学类型中低分化、中分化、高分化鳞癌,鳞腺癌、腺癌的淋巴结转移率分别为87.0%、34.0%、14.3%、57.1%和62.5%.浸润深度T1、T2、T3、T4的淋巴结转移率分别为13.3%、29.9%、47.8%和92.6%.以上三种因素间比较均有显著性差异(P＜0.001).淋巴结转移率与性别、年龄、民族、肿瘤部位和病理大体类型的关系不大.病变长度与浸润深度呈正相关.结论:肿瘤越大(长),浸润越深,分化程度越低,易发生淋巴结转移.     

青岛市2000／2001年结核病流行病学抽样调查分析

目的 了解青岛市结核病疫情及各市区防治现状，为改进防治措施，制定防治规划，提供科学依据。方法 采取整群不等比随机抽样，全市调查点9个，按照《第四次全国结核病流行病学抽样调查工作手册》要求进行。结果 实检人口14355人，占应检人口的97．2％；活动性肺结核患病率为202．02／10万，涂阳肺结核患病率为27．86／10万，较1990年活动性肺结核患病率242．03／10万、涂阳肺结核患病率30．02／10万年递减率分别为1.8％、0．8％。本次流调还显示：病人发现率低，漏报率高，漏登率及规律治疗率低，卡介苗接种阳转率低，均影响到疫情的下降。结论 青岛市结核病疫情仍较严重，防痨科普知识宣传，DOTS策略，重点人群普查，经费投入、卡介苗接种质量等防治措施有待加强。     

急性上消化道出血112例临床疗效分析

采用国家中医药管理局颁布的《中医血证治疗常规》治疗急性上消化道出血112例，取得了较好疗效，总有效率达94．6％。进行了证和疗效，原发病和疗效，病情程度和疗关系的分析。说明中医血证治疗效常规在临床实践中是切实可行的。     

PRENATAL DETECTION OF THE DELTA F 508 MUTATION USING FLUORESCENT PCR AND COMPARISON OF THE RESULTS WITH CONVENTIONAL PCR

Cystic fibrosis (CF) is the most common autosomal recessive disorder in Caucasians. The most frequent mutation associated with cystic fibrosis has been identified as the 3 bp deletion Delta F 508. While existing polymerase chain reactions (PCR) (allele specific amplification) used to screen for CF are both sensitive and specific, we tested the prenatal application of fluorescent polymerase chain reaction and subsequent DNA fragment analysis that appears to be fast and sensitive. DNA samples (n=146) isolated from amniotic fluid (n=108), chorion villus biopsies (n=6), and human peripheral blood (n=32) were analyzed for the presence of Delta F 508 using the fluorescent method. Of these, 10 carriers of Delta F 508 mutation were detected. We achieved the same results with conventional PCR and fluorescent PCR.