Involvement of MMPs in delayed neuronal death after global ischemia. 2002

Teresa Zalewska, and Małgorzata Ziemka-Nałecz, and Anna Sarnowska, and Krystyna Domańska-Janik
Laboratory of Molecular Neuropathology, Department of Neurochemistry, Medical Research Centre, Polish Academy of Sciences, 5 Pawiński St., 02-106 Warsaw, Poland. terezal@cmdik.pan.pl.

Spatial and temporal relations between metalloproteinase (MMP-2 and MMP-9) activation and laminin degradation in gerbil hippocampus after transient cerebral ischemia has been studied. Activity of MMPs was determined by gelatin zymography in homogenates from dorsal (DP, an equivalent of CA1 sector) and abdominal (AbP, containing CA2-4 and gyrus dentatus) parts of hippocampus. A significant activation of both investigated metalloproteinases was found at 72 h of recovery. Whereas MMP-2 up-regulation did not show any spatial preferences, the increase of MMP-9 activity was observed exclusively in DP. Activation of MMP-9 at this time point correlated spatially with degradation of laminin-protein of extracellular matrix. These results show that MMP pathway may function as a component of delayed neuronal death cascade in the apoptogenic CA1 sector after transient global ischemia.

UI MeSH Term Description Entries
D008297 Male Males
D009474 Neurons The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM. Nerve Cells,Cell, Nerve,Cells, Nerve,Nerve Cell,Neuron
D002545 Brain Ischemia Localized reduction of blood flow to brain tissue due to arterial obstruction or systemic hypoperfusion. This frequently occurs in conjunction with brain hypoxia (HYPOXIA, BRAIN). Prolonged ischemia is associated with BRAIN INFARCTION. Cerebral Ischemia,Ischemic Encephalopathy,Encephalopathy, Ischemic,Ischemia, Cerebral,Brain Ischemias,Cerebral Ischemias,Ischemia, Brain,Ischemias, Cerebral,Ischemic Encephalopathies
D005849 Gerbillinae A subfamily of the Muridae consisting of several genera including Gerbillus, Rhombomys, Tatera, Meriones, and Psammomys. Gerbils,Jird,Meriones,Psammomys,Rats, Sand,Gerbil,Jirds,Merione,Rat, Sand,Sand Rat,Sand Rats
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D016923 Cell Death The termination of the cell's ability to carry out vital functions such as metabolism, growth, reproduction, responsiveness, and adaptability. Death, Cell
D020778 Matrix Metalloproteinase 2 A secreted endopeptidase homologous with INTERSTITIAL COLLAGENASE, but which possesses an additional fibronectin-like domain. Gelatinase A,72-kDa Gelatinase,72-kDa Type IV Collagenase,MMP-2 Metalloproteinase,MMP2 Metalloproteinase,Matrix Metalloproteinase-2,72 kDa Gelatinase,72 kDa Type IV Collagenase,Gelatinase, 72-kDa,MMP 2 Metalloproteinase,Metalloproteinase 2, Matrix,Metalloproteinase, MMP-2,Metalloproteinase, MMP2
D020780 Matrix Metalloproteinase 9 An endopeptidase that is structurally similar to MATRIX METALLOPROTEINASE 2. It degrades GELATIN types I and V; COLLAGEN TYPE IV; and COLLAGEN TYPE V. Gelatinase B,92-kDa Gelatinase,92-kDa Type IV Collagenase,MMP-9 Metalloproteinase,MMP9 Metalloproteinase,Matrix Metalloproteinase-9,92 kDa Gelatinase,92 kDa Type IV Collagenase,MMP 9 Metalloproteinase,Metalloproteinase 9, Matrix,Metalloproteinase, MMP-9,Metalloproteinase, MMP9

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