Publication: Morphodynamic response of the rat light pinealocytes
to an injection act. lmplication of O-adrenoreceptors
Authors
Milin, J. ; Djakovic-Svajcei, K. ; Vuzevski, V.D. ; Milin, R.
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Publisher
Murcia : F. Hernández
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DOI
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info:eu-repo/semantics/article
Description
Abstract
The implication of B-adrenoreceptormediated
noradrenalin action on the reactive
morphodynamic response of light pinealocytes (LP) to
an injection act, conceived as a short-lasting stress
attack, is reported. An injection act, realized by
saline-injection, was manifested in the occurrence
of clustered «dusk» and «bright» cells - the
representative forms of functionally activated LP. The
time-related incidence of these cells entities - the
appearance of «dusk» and «bright» cells at 5 min,
transitory domination of «bright» cells and the nadir of
«dusk» cells at 20 min, sporadic recognition of
«bright» cells, lack of «dusk» cells at 45 min and the
absence of both cell forms at 180 min - displayed that
LP-reactive response promptly appeared and rapidly
ceased. The injection of B-adrenoreceptor antagonist,
propranolol, did not considerably alter the pattern of
LP-reactive response proper for saline-injected rats at
5 min. The constant presence of «dusk» and «bright»
cells, structurally changed in al1 the following time
periods under investigation, showed that this drug
disordered the course of LP-reactive response to an
injection act. On the contrary, LP of resting state was
not found to be affected. Estimating functionally, the
present results indicate that B-adrenoreceptormediated
noradrenalin action is required to promote,
maintain and accomplish the LP-reactive response to a
short-lasting stress inducement.
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