Τίτλος:
Blockade of gap junctions in vivo provides neuroprotection after perinatal global ischemia
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Background and Purpose - We investigated the contribution of gap junctions to brain damage and delayed neuronal death produced by oxygen-glucose deprivation (OGD). Methods - Histopathology, molecular biology, and electrophysiological and fluorescence cell death assays in slice cultures after OGD and in developing rats after intrauterine hypoxia-ischemia (HI). Results - OGD persistently increased gap junction coupling and strongly activated the apoptosis marker caspase-3 in slice cultures. The gap junction blocker carbenoxolone applied to hippocampal slice cultures before, during, or 60 minutes after OGD markedly reduced delayed neuronal death. Administration of carbenoxolone to ischemic pups immediately after intrauterine HI prevented caspase-3 activation and dramatically reduced long-term neuronal damage. Conclusions - Gap junction blockade may be a useful therapeutic tool to minimize brain damage produced by perinatal and early postnatal HI. © 2005 American Heart Association, Inc.
Συγγραφείς:
De Pina-Benabou, M.H.
Szostak, V.
Kyrozis, A.
Rempe, D.
Uziel, D.
Urban-Maldonado, M.
Benabou, S.
Spray, D.C.
Federoff, H.J.
Stanton, P.K.
Rozental, R.
Λέξεις-κλειδιά:
carbenoxolone; caspase 3; glucose; oxygen, animal cell; animal experiment; animal model; apoptosis; article; brain hypoxia; brain injury; brain ischemia; brain slice; controlled study; disease marker; electrophysiology; enzyme inhibition; female; fluorescence; gap junction; hippocampus; histopathology; in vivo study; male; nerve cell necrosis; neuroprotection; nonhuman; perinatal period; priority journal; rat, Animals; Anoxia; Anti-Ulcer Agents; Apoptosis; Brain; Carbenoxolone; Caspase 3; Caspases; Cell Communication; Connexins; Disease Models, Animal; DNA; Electrophysiology; Female; Gap Junctions; Glucose; Hippocampus; Hypoxia-Ischemia, Brain; Ischemia; Male; Mice; Mice, Inbred C57BL; Microscopy, Fluorescence; Nerve Degeneration; Neurons; Neuroprotective Agents; Nucleosomes; Oxygen; Polymerase Chain Reaction; Propidium; Rats; Rats, Sprague-Dawley; RNA, Messenger; Time Factors
DOI:
10.1161/01.STR.0000182239.75969.d8
