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Partial purification and characterization of cyclic nucleotide phosphodiesterases from human bronchial tissue

✍ Scribed by Håkan Bergstrand; Britta Lundquist

Publisher
Springer
Year
1978
Tongue
English
Weight
460 KB
Volume
21
Category
Article
ISSN
0300-8177

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✦ Synopsis

DEAE-Sephadex chromatography reveals the presence in extracts of human bronchial tissue of at least three separate cyclic nucleotide phosphodiesterases: a cyclic GMP-specific high affinity enzyme, a non-specific low affinity enzyme, and a high affinity cyclic AMP-specific enzyme. The activity of each fraction was partially characterized with respect to kinetic parameters, thermal stability, and the influence of a number of inhibitors. Each activity was found to resemble the activity of the previously characterized corresponding enzyme from whole lung tissue extracts. A high affinity non-specific phospho-diesterase previously isolated from lung tissue is missing in extracts of bronchial tissue.

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