PMID- 8957442 OWN - NLM STAT- MEDLINE DCOM- 19970108 LR - 20190512 IS - 0022-3069 (Print) IS - 0022-3069 (Linking) VI - 55 IP - 12 DP - 1996 Dec TI - The expression of tissue-type plasminogen activator, matrix metalloproteases and endogenous inhibitors in the central nervous system in multiple sclerosis: comparison of stages in lesion evolution. PG - 1194-204 AB - The expression of tissue-type plasminogen activator (t-PA) and a number of metalloproteases as well as plasminogen activator inhibitor-1 (PAI-1) and tissue inhibitor of metalloproteases-1 (TIMP-1) was analyzed in the central nervous system (CNS) of normal control and multiple sclerosis (MS) cases by immunohistopathology. The expression of t-PA was detectable only in the blood vessel matrix in control white matter, but positive infiltrating mononuclear cells were also observed in MS white matter and primary lesions. In active plaques this pattern converted to strong positivity of foamy macrophages in areas of demyelination, declining in chronic lesions. In general PAI-1 expression paralleled that of t-PA. Gelatinase A and B were detected predominantly in astrocytes and microglia throughout normal control white matter, with additional positive mononuclear cells in perivascular cuffs in MS white matter. In the demyelinating lesion there is widespread prominent expression of gelatinase B in reactive astrocytes and macrophages, which persists in astrocytes in the chronic lesion. TIMP-1 was also present in the vessel matrix and in lesional macrophages. These observations on the coexpression of enzymes and inhibitors of the matrix degrading cascade in CNS tissue pinpoint t-PA, a rate-limiting enzyme, and gelatinase B as therapeutic targets in MS. FAU - Cuzner, M L AU - Cuzner ML AD - Multiple Sclerosis Laboratory, Institute of Neurology, London, UK. FAU - Gveric, D AU - Gveric D FAU - Strand, C AU - Strand C FAU - Loughlin, A J AU - Loughlin AJ FAU - Paemen, L AU - Paemen L FAU - Opdenakker, G AU - Opdenakker G FAU - Newcombe, J AU - Newcombe J LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Neuropathol Exp Neurol JT - Journal of neuropathology and experimental neurology JID - 2985192R RN - 0 (Glycoproteins) RN - 0 (Myelin Proteins) RN - 0 (Nerve Tissue Proteins) RN - 0 (Plasminogen Activator Inhibitor 1) RN - 0 (RNA, Messenger) RN - 0 (Tissue Inhibitor of Metalloproteinases) RN - EC 3.4.21.68 (Tissue Plasminogen Activator) RN - EC 3.4.24.- (Metalloendopeptidases) SB - IM MH - Adult MH - Aged MH - Central Nervous System/*metabolism/pathology MH - Disease Progression MH - Enzyme Induction MH - Female MH - Gene Expression MH - Glycoproteins/*biosynthesis/genetics MH - Humans MH - In Situ Hybridization MH - Male MH - Metalloendopeptidases/*biosynthesis/genetics MH - Middle Aged MH - Multiple Sclerosis/*metabolism/pathology MH - Myelin Proteins/*metabolism MH - Nerve Tissue Proteins/*biosynthesis/genetics MH - Plasminogen Activator Inhibitor 1/*biosynthesis/genetics MH - RNA, Messenger/analysis MH - Tissue Inhibitor of Metalloproteinases MH - Tissue Plasminogen Activator/*biosynthesis/genetics EDAT- 1996/12/01 00:00 MHDA- 1996/12/01 00:01 CRDT- 1996/12/01 00:00 PHST- 1996/12/01 00:00 [pubmed] PHST- 1996/12/01 00:01 [medline] PHST- 1996/12/01 00:00 [entrez] AID - 10.1097/00005072-199612000-00002 [doi] PST - ppublish SO - J Neuropathol Exp Neurol. 1996 Dec;55(12):1194-204. doi: 10.1097/00005072-199612000-00002.