PMID- 7485409 OWN - NLM STAT- MEDLINE DCOM- 19951219 LR - 20211203 IS - 0002-9440 (Print) IS - 1525-2191 (Electronic) IS - 0002-9440 (Linking) VI - 147 IP - 5 DP - 1995 Nov TI - Cortical and brainstem-type Lewy bodies are immunoreactive for the cyclin-dependent kinase 5. PG - 1465-76 AB - The immunoreactivity of cortical and brainstem-type Lewy bodies has been investigates with antibodies to the cyclin-dependent kinase 5 (cdk5), to the extracellular regulated kinase 1 (ERK-1), and to the cdc2p34 kinase and with antibodies specific for phosphorylation epitopes typical of paired helical filament-tau (PHF-tau). Both cortical and brainstem-type Lewy bodies in diffuse Lewy body disease and brainstem-type Lewy bodies in Parkinson's disease were found to be immunoreactive for cdk5 but not for cdc2p34 or ERK-1 or with the PHF-tau antibodies. Double immunolabeling showed that cdk5-positive Lewy bodies were also ubiquitin immunoreactive and that cdk5 antibodies labeled as many Lewy bodies as ubiquitin antibodies in adequately fixed tissue. The cdk5 immunoreactivity of Lewy bodies was abolished by preabsorption of the antibody with a cdk5 peptide. The antibodies to cdk5 labeled a single 33-kd species on Western blots of human brain homogenates, with a similar intensity in control, diffuse Lewy body disease, and Alzheimer's disease, and this cdk5 species was found mainly in the particulate fraction of brain homogenates. This observation suggests that cdk5 might be a protein kinase involved in the phosphorylation of a molecular component of Lewy bodies, for example, neurofilament proteins known to be present in these inclusions. FAU - Brion, J P AU - Brion JP AD - Laboratory of Pathology and Electron Microscopy, Free University of Brussels, Belgium. FAU - Couck, A M AU - Couck AM LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Am J Pathol JT - The American journal of pathology JID - 0370502 RN - 0 (Antibodies, Monoclonal) RN - 0 (Heat-Shock Proteins) RN - 0 (Ubiquitins) RN - 0 (tau Proteins) RN - EC 2.7.11.1 (Cyclin-Dependent Kinase 5) RN - EC 2.7.11.1 (Protein Serine-Threonine Kinases) RN - EC 2.7.11.17 (Calcium-Calmodulin-Dependent Protein Kinases) RN - EC 2.7.11.22 (CDC2 Protein Kinase) RN - EC 2.7.11.22 (CDK5 protein, human) RN - EC 2.7.11.22 (Cyclin-Dependent Kinases) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinase 3) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinases) SB - IM MH - Aged MH - Aged, 80 and over MH - Alzheimer Disease/immunology/pathology MH - Antibodies, Monoclonal/chemistry MH - Brain Stem/immunology/*pathology MH - CDC2 Protein Kinase/immunology MH - Calcium-Calmodulin-Dependent Protein Kinases/immunology MH - Cerebral Cortex/chemistry/immunology/*pathology MH - Cyclin-Dependent Kinase 5 MH - *Cyclin-Dependent Kinases MH - Heat-Shock Proteins/immunology MH - Humans MH - Lewy Bodies/*immunology MH - Middle Aged MH - Mitogen-Activated Protein Kinase 3 MH - *Mitogen-Activated Protein Kinases MH - Parkinson Disease/immunology/pathology MH - Protein Serine-Threonine Kinases/*immunology MH - Ubiquitins/immunology MH - tau Proteins/immunology PMC - PMC1869502 EDAT- 1995/11/01 00:00 MHDA- 1995/11/01 00:01 PMCR- 1996/05/01 CRDT- 1995/11/01 00:00 PHST- 1995/11/01 00:00 [pubmed] PHST- 1995/11/01 00:01 [medline] PHST- 1995/11/01 00:00 [entrez] PHST- 1996/05/01 00:00 [pmc-release] PST - ppublish SO - Am J Pathol. 1995 Nov;147(5):1465-76.