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In vitro and in vivo studies on capsaicin and membrane bound calcium interactions in the rat lung using chlorotetracycline (CTC) as a fluorescence probe
Author(s) -
De Amit Krishna,
Ghosh Jagat Jiban
Publication year - 1991
Publication title -
phytotherapy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.019
H-Index - 129
eISSN - 1099-1573
pISSN - 0951-418X
DOI - 10.1002/ptr.2650050103
Subject(s) - capsaicin , calcium , in vivo , chemistry , in vitro , membrane , biophysics , pharmacology , membrane permeability , medicine , biochemistry , biology , receptor , microbiology and biotechnology , organic chemistry
Chlorotetracycline calcium fluorescence studies have been carried out on acute and chronic capsaicin treated rat lung mitochondria and microsome membrane fractions in the presence of different concentrations of capsaicin (1–100 nM) under in vivo conditions. Results indicate, that acute capsaicin treated rat lung membrane fractions are quite different from those that are chronically treated, with respect to capsaicin mediated calcium permeability, measured in terms of calcium induced CTC fluorescence alterations. It seems that the reported ‘activation’ phenomena of acute capsaicin treatment may be associated with calcium influx across the membrane. On the other hand, the reported ‘desensitization’ phenomena of chronic capsaicin treatment may be due to inhibition of capsaicin mediated calcium influx.