Vaccination is the only prophylactic or therapeutic intervention that has ever eliminated a disease (e.g. smallpox). It also has well established utility in disease therapy (e.g. rabies). Transgenic mouse models of Alzheimer's disease (AD) develop high density A-beta deposits in cerebral cortex and hippocampus, neuritic changes and, ultimately, inflammatory reactions to these deposits. Recently, vaccination of the PDAPP transgenic mouse with A-beta peptide was found to prevent A-beta deposition in the brain. Unfortunately, the functional consequences of this treatment could not be effectively assessed in these mice, owing to severe learning and memory deficiencies observed early in the lifespan. The investigators propose to assess the functional consequences of vaccination in their doubly transgenic mAPP/mPS1 -mouse model of AD. These mice develop learning and memory deficits which correlate with the accumulation of A-beta, deposits. They will test whether vaccines that prevents/reduces A-beta accumulation can either attenuate or aggravate the behavioral deficits found in these mice. They predict different outcomes depending on the age of vaccination. They will verify histopathologically and biochemically that the vaccines reduce A-beta loads in the CNS, while carefully documenting the degree of inflammation found in these mice. In addition to testing the vaccination hypothesis, these data will address the question of A-beta amyloid's role in cognitive dysfunction. Anticipating that prophylactic vaccination at early ages will ameliorate some of the behavioral deficits normally occurring in these mice, they'll investigate alternatives to the A-beta1-42 peptide as vaccines, and test their effectiveness in old as well as young mice. One less expensive alterative to peptides are DNA vaccines, a novel inoculation technique which elicits both humoral and cellular immunity. This technology is already in human clinical trials. Passive immunization with polyclonal and monoclonal antibody preparations is an alterative to vaccines that will be tested for efficacy in this animal model. Advantages of passive immunization are safety and potentially greater effectiveness in older individuals with poor immunization responses to vaccines. Together, these later studies will determine the relative contributions of humoral and cellular immune reactions in mediating the effects of vaccines in transgenic mouse models of AD.

Agency
National Institute of Health (NIH)
Institute
National Institute on Aging (NIA)
Type
Research Project (R01)
Project #
5R01AG018478-04
Application #
6631555
Study Section
Special Emphasis Panel (ZRG1-BDCN-4 (01))
Program Officer
Snyder, Stephen D
Project Start
2000-08-15
Project End
2005-06-30
Budget Start
2003-07-01
Budget End
2004-06-30
Support Year
4
Fiscal Year
2003
Total Cost
$449,645
Indirect Cost
Name
University of South Florida
Department
Physiology
Type
Schools of Medicine
DUNS #
069687242
City
Tampa
State
FL
Country
United States
Zip Code
33612
Li, Qingyou; Lebson, Lori; Lee, Daniel C et al. (2012) Chronological age impacts immunotherapy and monocyte uptake independent of amyloid load. J Neuroimmune Pharmacol 7:202-14
Morgan, D (2011) Immunotherapy for Alzheimer's disease. J Intern Med 269:54-63
Wilcock, Donna M; Morgan, Dave; Gordon, Marcia N et al. (2011) Activation of matrix metalloproteinases following anti-A? immunotherapy; implications for microhemorrhage occurrence. J Neuroinflammation 8:115
Ajmo, Joanne M; Bailey, Lauren A; Howell, Matthew D et al. (2010) Abnormal post-translational and extracellular processing of brevican in plaque-bearing mice over-expressing APPsw. J Neurochem 113:784-95
Li, Qing-you; Gordon, Marcia N; Chackerian, Bryce et al. (2010) Virus-like peptide vaccines against Abeta N-terminal or C-terminal domains reduce amyloid deposition in APP transgenic mice without addition of adjuvant. J Neuroimmune Pharmacol 5:133-42
Carty, Nikisha; Lee, Daniel; Dickey, Chad et al. (2010) Convection-enhanced delivery and systemic mannitol increase gene product distribution of AAV vectors 5, 8, and 9 and increase gene product in the adult mouse brain. J Neurosci Methods 194:144-53
Lord, Anna; Englund, Hillevi; Söderberg, Linda et al. (2009) Amyloid-beta protofibril levels correlate with spatial learning in Arctic Alzheimer's disease transgenic mice. FEBS J 276:995-1006
Morgan, Dave; Landreth, Gary; Bickford, Paula (2009) The promise and perils of an Alzheimer disease vaccine: a video debate. J Neuroimmune Pharmacol 4:1-3
Karlnoski, Rachel A; Rosenthal, Arnon; Kobayashi, Dione et al. (2009) Suppression of amyloid deposition leads to long-term reductions in Alzheimer's pathologies in Tg2576 mice. J Neurosci 29:4964-71
Morgan, Dave (2009) The role of microglia in antibody-mediated clearance of amyloid-beta from the brain. CNS Neurol Disord Drug Targets 8:7-15

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