PMID- 10611635 OWN - NLM STAT- MEDLINE DCOM- 20000217 LR - 20061115 IS - 0887-4476 (Print) IS - 0887-4476 (Linking) VI - 35 IP - 2 DP - 2000 Feb TI - Hemisynaptic distribution patterns of presenilins and beta-APP isoforms in the rodent cerebellum and hippocampus. PG - 96-110 AB - Healthy brain neurons co-express Alzheimer's disease (AD) related proteins presenilins (PS) and beta-amyloid precursor protein (beta-APP). Deposition of beta-amyloid and PS in the senile plaques of AD brain and their ability to interact in vitro suggest that AD pathology could arise from a defect in the physiological interactions between beta-APP and PS within and/or between neurons. The present study compares the immunocytochemical distribution of PS (1 and 2) and beta-APP major isoforms (695 and 751/770) in the synapses of the cerebellum and hippocampus of the adult rat and mouse. In the cerebellar cortex of both species, the four molecules are immunodetected in the presynaptic or the postsynaptic compartments of synapses, suggesting that they are involved in interneuronal relationships. In contrast, PS and beta-APP are postsynaptic in almost all the immunoreactive synapses of the hippocampus. The different distribution patterns of these proteins in cerebellar and hippocampal synapses may reflect specific physiological differences, responsible for differential vulnerability of neurons to AD synaptic pathology. Defective interactions between beta-APP and PS at the synapses could impede the synaptic functions of beta-APP, inducing the selective loss of synapses that accounts for cognitive impairment in AD. CI - Copyright 2000 Wiley-Liss, Inc. FAU - Ribaut-Barassin, C AU - Ribaut-Barassin C AD - Laboratoire de Neurobiologie Cellulaire CNRS UPR 9009, Strasbourg, France. FAU - Moussaoui, S AU - Moussaoui S FAU - Brugg, B AU - Brugg B FAU - Haeberle, A M AU - Haeberle AM FAU - Huber, G AU - Huber G FAU - Imperato, A AU - Imperato A FAU - Delhaye-Bouchaud, N AU - Delhaye-Bouchaud N FAU - Mariani, J AU - Mariani J FAU - Bailly, Y J AU - Bailly YJ LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Synapse JT - Synapse (New York, N.Y.) JID - 8806914 RN - 0 (Amyloid beta-Protein Precursor) RN - 0 (Membrane Proteins) RN - 0 (Protein Isoforms) SB - IM MH - Amyloid beta-Protein Precursor/*analysis MH - Animals MH - Cerebellum/*cytology/ultrastructure MH - Hippocampus/*cytology/ultrastructure MH - Immunohistochemistry MH - Membrane Proteins/*analysis MH - Mice MH - Mice, Inbred C57BL MH - Microscopy, Immunoelectron MH - Protein Isoforms/analysis MH - Rats MH - Rats, Long-Evans MH - Synapses/*ultrastructure EDAT- 1999/12/28 09:00 MHDA- 2000/02/19 09:00 CRDT- 1999/12/28 09:00 PHST- 1999/12/28 09:00 [pubmed] PHST- 2000/02/19 09:00 [medline] PHST- 1999/12/28 09:00 [entrez] AID - 10.1002/(SICI)1098-2396(200002)35:2<96::AID-SYN2>3.0.CO;2-0 [pii] AID - 10.1002/(SICI)1098-2396(200002)35:2<96::AID-SYN2>3.0.CO;2-0 [doi] PST - ppublish SO - Synapse. 2000 Feb;35(2):96-110. doi: 10.1002/(SICI)1098-2396(200002)35:2<96::AID-SYN2>3.0.CO;2-0.