Heparin effect on ionised calcium concentration

The effect of heparin on plasma ionised calcium was studied by adding it in increasing amounts to whole blood from 10 normal subjects. There was no significant change in ionised calcium from the addition of 1 U/ml but a significant fall of 0.02 mmol/1 when 2 U/ml were added and a progressive further fall with increasing concentrations. Heparin from three different manufacturers produced similar results. The effect of heparinisation in vivo was studied during regular haemodialysis on 10 patients with chronic renal failure. Following intravenous injection of 10000 U of heparin there was a consistent and significant fall averaging 0.03 mmol/l.     

垂体后叶素对家兔血糖、血钾影响作用实验研究

目的:本实验研究以垂体后叶素注射家兔前、后取得全血而得到血清,分为对照组和实验组来研究垂体后叶素对家兔血糖、血钾影响作用。方法:以半自动生化分析仪、日立717测定,统计学配对设计方法、t检验处理,观察对照组与实验组比较,血糖差异(P<0.01)、血钾差异(P<0.01)。结果:垂体后叶素对家兔有明显升高血糖、升高血钾作用。结论:此项实验研究为糖尿病发病原因、机理进一步探讨,提供有力依据。     

抗性家蝇蛹期多肽的双向电泳分析

分析抗性家蝇蛹期多肽，以了解蛋白质变化情况。方法：对家蝇的抗性株、对照株和敏感株蛹体内的多肽进行了聚丙烯酸胺凝胶电泳分析。结果：抗性株具有一特异的多肽点，且有3个多肽点在量上明显多于对照株。结论：杀虫剂的作用可使抗性家蝇体内的蛋白在质和量上发生改变。     

Ziehl-Neelsen-维多利亚蓝-碘绿复合染色法显示抗酸杆菌

目的 :探讨显示皮肤活检组织中抗酸麻风杆菌、弹力纤维和细胞等组织成分的复合染色法。方法 :运用Ziehl Neelsen(Z N)苯酚复红染色液、维多利亚蓝 (Victoriablue ,VB)染色液、碘绿 (iodinegreen ,IG)和马汀氏黄 (Mar tiusyellow ,MY)染色液对皮肤活检组织进行复合染色。结果 :组织内结核样结节中麻风杆菌显示为红色 ,细胞核呈淡绿色 ,细胞浆无色 ,结节周围的弹性纤维呈蓝色 ,基质呈淡黄色。结论 :Z N原法染色单一 ,对比效果差 ,应用碘绿、马汀氏黄和维多利亚蓝复合的改造染色液 ,能更好显示组织中的麻风杆菌 ,以及包绕于结核样结节周围的弹力纤维等成分 ,该方法是一种对比清晰 ,可靠的复合染色法     

Role of Der p 1–specific B cells in immune tolerance during 2 years of house dust mite–specific immunotherapy

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Altered chromatin landscape in circulating T follicular helper and regulatory cells following grass pollen subcutaneous and sublingual immunotherapy

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Circulating immune complexes during immunotherapy.

Chronic immunization may lead to the production of circulating immune complexes (CICs). This study was undertaken to determine the presence of circulating IgG immune complexes in 95 subjects with allergic rhinitis/asthma receiving immunotherapy, 46 individuals with similar diagnosis but not on immunotherapy, and 64 healthy controls. Modified Raji cell and murine leukemia cell (L-1210) assays, selected for a high density of Fc receptors and devoid of Epstein-Barr virus membrane antigen, were used. Other immunological parameters such as immunologlobulins G, A, M, E, and rheumatoid factor activity were also studied. The CIC concentrations in the treated group did not differ significantly from the untreated group, although both groups did have a significantly higher concentration than the healthy controls. The presence of CICs has no relationship with age or sex of patients, dosage of allergen administered, number and nature of allergens received, period between the time of last injection and the blood sampling, and the duration of immunotherapy. Serum IgG, IgA, IgM, and rheumatoid factor activity did not differ between the treated and untreated groups. IgE was significantly higher in the treated group when compared with the untreated, and IgE levels in treated patients with elevated CICs were significantly increased compared with CIC-negative treated patients. These data suggest that CICs are present in serum of atopic diseases such as allergic rhinitis/asthma. Significantly, an association of elevation of CICs with immunotherapy could not be demonstrated.     

A graded dose assessment of the efficacy of beclomethasone dipropionate aerosol for severe chronic asthma.

In a 26-wk double-blind controlled study of 34 patients whose asthma had been poorly controlled despite oral steroids, valuable clinical and pulmonary function improvement was derived by adding beclomethasone aerosol to the prednisone regimen. The amount of improvement correlated linearly with beclomethasone dosage over the range 200 to 1,600 microng/day. These patients required relatively high dosage. Success in achieving asymptomatic status was only 26% with the conventional 400 microng/day and 60% at 1,600 microng/day. Oropharyngeal candidiasis was also dose-related but did not prohibit the use of high-dosage beclomethasone. Respiratory infections, physical signs, blood glucose, and electrolytes were unaffected by the drug. A dose-related suppression of cortisol secretion was demonstrated, but about 1/4 of the group had normal plasma cortisol even at 1,600 microng/day plus the oral prednisone. An individualized risk-benefit assessment seems a better basis for choosing an optimal beclomethasone regimen for each patient than adherence to a conventionalized fixed dosage of 400 microng/day. This requires definition of: (1) a specific goal of treatment in the individual patient and the beclomethasone dosage required to achieve it; (2) the adrenocortical functional response of that particular patient to the desired dose of beclomethasone; and (3) the presence and degree of any dose-limiting constraints such as preexisting complications of steroid use.