Effects of galanin on insulin and glucagon secretion in the rat

Galanin-like immunoreactivity has been visualized in nerve fibers in the islets of Langerhans, suggesting an involvement of galanin in the neural regulation of islet function. In this study, we investigated the effects of galanin on basal and stimulated insulin and glucagon secretion by infusing the peptide at three different dose rates in rats. We also studied the direct effect of galanin on insulin secretion from freshly isolated rat islets. At 320 pmol/kg/min, but not at 20 or 80 pmol/kg/min, galanin lowered basal plasma insulin levels. In contrast, basal plasma glucagon levels were lowered by galanin already at 20 and 80 pmol/kg/min. Furthermore, galanin inhibited both glucose- and arginine-induced insulin release at all three dose levels, whereas arginine-induced glucagon release was not affected by galanin. Glucose-stimulated insulin secretion from isolated rat islets was dose-dependently suppressed by galanin (10^-6-10^-8M). Therefore, it is concluded that galanin in rats inhibits insulin secretion, both in vivo and in vitro, and that at lower dose levels, the peptide also inhibits basal glucagon release.     

Nurse practitioner and physician assistant practices in three HMOs: implications for future US health manpower needs.

This study empirically examines the practices of non-physician providers (NPPs) within three large competitive health maintenance organizations (HMOs), as well as the physicians' and NPPs' views regarding the ideal role of NPPs. These roles are compared with NPP delegation patterns incorporated in the modeling methodology developed by the Graduate Medical Education National Advisory Committee (GMENAC). GMENAC recommended relatively high levels of delegation by physicians to NPPs. One of the HMO sites made use of NPPs at rates even higher than GMENAC's national ideals, while the rates at the other two were lower. The normative ideals for pediatric NPPs developed at each HMO were consistently higher than their actual roles. Concerns with acceptance and the role of NPPs are clearly no longer issues. Instead, the limits on NPP involvement appear to relate to considerations of costs, availability, and the increasing numbers of physicians competing for similar opportunities.     

Activity of newer beta-lactam agents against clinical isolates of Bacteroides fragilis and other Bacteroides species.

The in vitro activities of beta-lactam antibiotics against Bacteroides fragilis and B. fragilis group isolates are presented. Clinical isolates from 1986 were compared with strains from 1979 to 1982. Imipenem, ticarcillin-clavulanic acid, and ceftizoxime were the most active agents. Cefotetan was equivalent to cefoxitin against B. fragilis but less active against B. fragilis group isolates. Enhancement of cefotaxime by its desacetyl metabolite was minimal.     

Platelet-binding immunoglobulins in pregnancy-induced hypertension I. Platelet-associated IgM on fetal platelets: evidence of a fetal autoimmune reaction?

Pregnancy-induced hypertension (PIH) can be complicated by maternal or fetal thrombocytopenia, or both. In order to investigate possible immunologic causes of these thrombocytopenias, platelet-associated IgG (PAIgG) and IgM (PAIgM) were measured in mothers with PIH and in their infants and compared with those from patients with autoimmune thrombocytopenic purpura (ATP), a known immunodestructive platelet disorder. Many PIH patients (33.3%) and most ATP patients (68.1%) had elevated levels of maternal PAIgG. In both diseases, the amount of PAIgG was directly proportional with the degree of thrombocytopenia (r = 0.446 in PIH and R = 0.668 for ATP). But in neither disease did the degree of maternal thrombocytopenia correlate with the degree of neonatal thrombocytopenia (r = 0.153 for PIH and R = 0.175 for ATP). Umbilical cord samples from PIH patients contained PAIgG (53.3%) and PAIgM (53.8%), whereas the umbilical cord samples from ATP patients had elevated amounts of PAIgG but not PAIgM. PAIgM in the umbilical cord blood could not be accounted for by IgM rheumatoid factors, IgM-containing immune complexes, or non-specific adsorption because of elevated total IgM levels. The umbilical cord blood PAIgM was probably not of maternal origin because it was observed even when the maternal blood contained no PAIgM and maternal IgM is not normally transported transplacentally. Therefore, the PAIgM appears to be of fetal origin. These results suggest that both maternal and fetal immunologic mechanisms may be involved in PIH-induced thrombocytopenia; if so, this is one of the first reported examples of a possible fetal autoimmune response.     

183例老年人骨密度检测分析

目的 :研究老年人不同疾病时骨密度 (BMD)的分布情况。方法 :用DXADAS 6 0 0EX型骨密度仪对183例老年患者进行左侧远程桡骨加尺骨BMD检测。结果 :内分泌疾病组、消化道疾病组和其它疾病组的患病率分别为 72 7% ,2 0 6 %和 31 4 %。T值比较 :三组差异明显 (P <0 0 0 1)。累积骨丢失率 (ABLR)比较 :前一组明显高于后两组病人 (P <0 0 1)。BMD比较中 ,内分泌和其它疾病组明显低于消化道疾病组 (P <0 0 0 1)。相关分析显示 ,内分泌和消化道疾病组的年龄变化与BMD呈正相关 (r =0 5 19P <0 0 0 1和r =0 5 89P <0 0 0 1) ,内分泌疾病组和其它疾病组的体重变化与BMD呈正相关 (r=0 918P <0 0 0 1和r =0 338P <0 0 0 1)。结论 :老年人骨质疏松 (OP)患病率以内分泌疾病组最高 ,消化道疾病组较低 ;随年龄和体重增加 ,BMD降低加重。     

多形性低度恶性腺癌的组织病理学与免疫组化研究

目的：研究多形性低度恶性腺癌（PLGA）的组织病理学和免疫组织化学特点，并与腺样囊性癌（ACC）进行比较。方法；采用组织病理学与免疫组织化学方法，对8例PLGA与10例ACC进行分析。结果；PLAC的特点是组织学上具有细胞形态的一致性与组织结构的多形性；免疫级化染色呈阳性或部分阳性反应，与ACC没有明显差异。结论：光镜下组织结构的多形性是鉴别PLGA与ACC的重要指征；免疫组化对二者的区分意义不大；均起源于闰管储备细胞是导致二者相似性的根本原因。     

Importance of screening the peripheral smear

A 5-year-old boy presented with history of failure to thrive from infancy. There was a history of one sibling death due to similar problems and history of severe abortions in the mother. Routine examination of peripheral smear revealed more than 50% acanthocytes. Based on this tests were streamlined to doing lipid profile and Lipo protein electrophoresis which revealed hypolipidemia and absent Β hypo protein band. Jejuna) mucosal biopsy confirmed the diagnosis of A Beta Lipo proteinemia which revealed lipid laden enterocytes. This case illustrates the importance of simple tests like peripheral smear examination in streamlining further tests in the diagnosis of major diseases.     

缩窄性心包炎的外科治疗

报告12例缩窄性心包炎外科治疗的体会，本组病例的特点是病史长，入院前误诊率高（41.6%)，心增厚达0.5-2cm，龟壳样变。结果：12例手术资料随访1-6a，手术疗效满意，认为对诊断明确者应及早手术治疗，尽可能彻底剥脱缩窄的心包是手术疗效的关键。     

激活素A对人肝星状细胞系LI 90细胞增殖的影响

目的：检测激活素（ACT）A对肝星状细胞（HSC）系LI90细胞增殖的影响。方法：采用基因重组人ACT A（0．025－250ng/ml）、转化生长因子－β1（TGF－β1）、镦泡抑素（FS）处理体外培养的人HSC系LI90，采用四唑盐比色法（MTT法）检测其对细胞增殖的影响。结果：ACT A浓度在0.025-250ng/ml范围内，均可刺激LI90细胞增殖，0.025-25ng/ml浓度范围内的ACT A作用轻微，而250ng/ml的ACT A作用明显增强（P＜0．01）；相反，TGF－β1（2．5ng/ml）对LI90细胞增殖无明显影响；0．315ng/ml FS与浓度为0.25ng/ml的ACT A共同孵育可阻断ACT A促进LI90增殖的活性（P＜0．05），而0．315ng/ml FS单独作用对LI 90细胞生长明显影响。结论：ACT可促进HSC增殖，在肝纤维化发病机制中发挥重要作用。     

全去带乙状结肠原位可控膀胱术25例随访报告

目的：探讨全去带乙状结肠原位可控膀胱术的临床效果。方法：对25例施行该术式术后患者的可控性、尿动力、血清电解质、肾功能、生活质量等进行随访观察。结果：25例随访2－15个月，平均11．3个月。白天完全自控排尿25例（100％）；夜间完全自控排尿24例（96．0％），1例偶有遗尿；贮尿囊容量220－370ml，平均320ml；贮尿囊内压力1．86－3．92kPa，平均2.44kPa。IVU及贮尿囊造影示单侧贮尿囊输尿管反流2例（8．0％），无肾积水；膀胱镜检查2例（8．0％）贮尿囊内出现细沙样结石，1例（4．0％）贮尿囊后尿道吻合口狭窄，经尿道直视内切开术治愈。15例（60．0％）男性患者保留性功能，肾功能正常，1例（4．0％）出现一过性高氯血症。结论：全去带乙状结肠原位可控膀胱术手术成功率高，疗效可靠，患者生活质量高，是一种较理想的尿路分流术，值得推广。