Bernd Kalthof

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Metridia longa is a marine copepod from which a blue bioluminescence originates as a secretion from epidermal glands in response to various stimuli. We demonstrate that Metridia luciferase is specific for coelenterazine to produce blue light (lambda(max) = 480 nm). Using an expression cDNA library and functional screening, we cloned and sequenced the cDNA(More)
Nitric oxide (NO) plays an important role in protection against the onset and progression of various cardiovascular disorders. Therefore, the NO/guanosine 3',5'-cyclic monophosphate (cGMP) pathway has gained considerable attention and has become a target for new drug development. We have established a rapid, homogeneous, cell-based, and highly sensitive(More)
1. Single cultured pig aortic smooth muscle cells were studied using fura-2 and dual excitation wavelength microfluometry. 2. Extracellular ATP in micromolar concentrations induced a transient increase of [Ca2+]i due to Ca2+ release from internal stores. In the same concentration range application of ATP resulted in an increase of intracellular inositol(More)
Adrenomedullin (ADM) and calcitonin gene-related peptide (CGRP) receptors and their respective ligands play important roles in cardiovascular (patho-)physiology. Functional expression of ADM and CGRP receptors requires the presence of the calcitonin receptor-like receptor (CRLR) together with receptor-activity-modifying proteins (RAMPs). We have(More)
Functional cell-based assays have gained increasing importance for microplate-based high throughput screening (HTS). The use of high-density microplates, most prominently 1536-well plates, and miniaturized assay formats allow screening of comprehensive compound collections with more than 1 million compounds at ultra-high throughput, i.e. in excess of(More)
The effects of electrical field stimulation on [Ca2+]i in the A7r5 vascular smooth muscle cell line have been monitored with the Ca(2+)-sensitive dye fura-2. The experimental set-up allowed high-temporal resolution of the [Ca2+]i-measurements and fast application of test solutions. Electrical field stimulation of A7r5 cells in the confluent growth state(More)
Functional characterization of membrane channels by patch clamp techniques has revealed great diversity of transmitter or Voltage gated channels in native membranes. Concomitantly recombinant DNA techniques revealed a plethora of genes encoding channel subunits. Thus functional diversity within a particular class of channels may be generated by families of(More)
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