Hans Reinauer

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The influence of a non-ketonic, chronically diabetic state (60 mg/kg streptozotocin) on cardiac function and metabolism was studied under in vivo conditions by inserting a Millar-tip catheter into the left ventricle and in the model of the isolated perfused heart. In vivo heart rate and maximal left ventricular systolic pressure were reduced after a(More)
BACKGROUND The IFCC Reference Measurement System for hemoglobin (Hb)A(1c) (IFCC-RM) has been developed within the framework of metrologic traceability and is embedded in a network of 14 reference laboratories. This paper describes the outcome of 12 intercomparison studies (periodic evaluations to control essential elements of the IFCC-RM). METHODS Each(More)
BACKGROUND AND OBJECTIVE The determination of parathyroid hormone (PTH) is of great clinical relevance in the assessment of calcium metabolic disorders. Although PTH was one of the first hormones measured by immunoassays, there are still many difficulties in its determination due to the low concentration of the hormone in blood and due to the heterogeneity(More)
A proteolytic enzyme was purified from the post-myofibrillar fraction of rat skeletal muscle. The purification procedure consisted of fractionation of the muscle extract by (NH4)2SO4, chromatography on DEAE-Sephacel, fast protein liquid chromatography on Mono Q and gel filtration on Sepharose 6B. The enzyme preparation appeared to be homogeneous as judged(More)
We studied insulin binding to human erythrocytes using two different 125I-insulin-tracers. Erythrocytes of 8 normal subjects were examined using [mono-125II-(Tyr A 14)insulin as tracer. Three of these erythrocyte preparations were examined simultaneously using [125I]insulin, which was randomly iodinated by the chloramine-T-method. Data were analysed by a(More)
Cholera toxin, in contrast to its stimulatory action on adenylate cyclase, renders the insulin-stimulated adipose cell insensitive to the inhibitory actions of lipolytic agents such as isoprenaline, adrenocorticotropic hormone or glucagon. Conversely, pertussis toxin eliminates both the stirnulatory actions of the antilipolytic agents, such as adenosine,(More)
In perfused hearts of streptozotocin-diabetic rats the kinetics of a fluoresce indicator transit was measured after pulse injection of FITC-dextran 3. The fluorescence changes on the left ventricle could be described by two pseudo first-order processes with half times in the range of seconds (t/2) corresponding to the intravascular washout and a slow(More)
Isolated muscle cells from adult rat heart were used to study the involvement of G-proteins in the regulation of the glucose transporter by insulin and isoprenaline. Efficient modification of G-protein functions was established by measuring isoprenaline-stimulated cyclic AMP production, viability and ATP content after treating the cells with cholera toxin(More)