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Neuroscience ; 326: 69-83, 2016 06 21.
Artigo em Inglês | MEDLINE | ID: mdl-27058148

RESUMO

Cognitive impairment, anxiety- and depressive-like symptoms are well recognized outcome of cerebral ischemia in clinical and preclinical settings. Rolipram, a phosphodiesterase-4 (PDE-4) inhibitor, improves cognition and produces anxiolytic- and antidepressant-like effects in rodents. Rolipram also exerts anti-inflammatory effects and enhances survival of newborn hippocampal neurons in mice subjected to transient global cerebral ischemia. Here, we evaluated the effects of chronic rolipram treatment in mice subjected to transient global brain ischemia. C56B6/7 mice were subjected to bilateral common carotid artery occlusion (BCCAO) and were then tested in a multi-tiered behavioral battery including the elevated zero maze (EZM), open field (OF), object location test (OLT), and forced swim test (FST). We also investigated the effects of rolipram on hippocampal neurodegeneration and the expression of the neuronal plasticity markers doublecortin (DCX) and microtubule-associated protein (MAP-2). Ischemic mice exhibited memory deficits OLT, higher levels of anxiety EZM and behavioral despair FST. BCCAO caused neuronal loss in the CA3 hippocampal subfield and basolateral amygdala (BLA). In the hippocampus of BCCAO mice, a disrupted neuronal plasticity was evidenced by decreased DCX expression. Chronic treatment with rolipram attenuated the behavioral effects of BCCAO. Rolipram also decreased neurodegeneration in the CA3 while it increased dendritic arborization of DCX-immunoreactive (DCX-IR) neurons and microtubule associate MAP-2 expression in the hippocampus of BCCAO mice. These data suggest that chronic inhibition of PDE-4 can be a useful therapeutic strategy to improve the emotional and cognitive outcomes of transient global cerebral ischemia.


Assuntos
Ansiedade/prevenção & controle , Isquemia Encefálica/complicações , Disfunção Cognitiva/prevenção & controle , Hipocampo/efeitos dos fármacos , Plasticidade Neuronal/efeitos dos fármacos , Inibidores da Fosfodiesterase 4/administração & dosagem , Rolipram/administração & dosagem , Animais , Ansiedade/etiologia , Comportamento Animal/efeitos dos fármacos , Isquemia Encefálica/metabolismo , Disfunção Cognitiva/etiologia , Proteínas do Domínio Duplacortina , Proteína Duplacortina , Hipocampo/metabolismo , Hipocampo/patologia , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Proteínas Associadas aos Microtúbulos/metabolismo , Neuropeptídeos/metabolismo , Memória Espacial/efeitos dos fármacos
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