Effect of k+-channel openers on morphofunctionallysosomes state under acute hypoxic hypoxia
О.A. Gonchar, K.V. Rozova, M.M. Seredenko
A.A.Bogomoletz Institute of Physiology, NAS,Kiev;V.P.Komissarenko Institute of Endocrinology,AMS, Kiev
Abstract
Here we summarises the results of experimental inve-
stigation of changes in intracellular calcium homeo-
stasis in sensory neurones of rats with streptozotocin -
induced diabetes mellitus. Decrease in the calcium-
accumulating function of both inositol-trisphospha-
te- as well as caffeine-sensitive endoplasmic reticulum
has been detected both in primary sensory neurones
of dorsal root ganglia and in secondary neurones of
the spinal cord dorsal horn. Predominant depression
in the functioning of metabotropic receptors of li-
gand-gated channels compared with those of iono-
tropic ones has been demonstrated. Changes in the
pharmacological sensitivity of potential-operated cal-
cium channels (predominantly of L-type), linked,
probably, with alterations of functional connections
between membrane channels and endoplasmic reti-
culum, are described. A predominant role of changes
in the functioning of intracellular Ca2+-accumulating
structures, leading to prolongation of depolarisation-
induced Ca2+ transients in primary and secondary
sensory neurones and corresponding changes in the
transmission of nociceptive signals during diabetic
neuropathy are discussed.
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