PT  - JOURNAL ARTICLE
AU  - Kane, Michael D.
AU  - Lipinski, William J.
AU  - Callahan, Michael J.
AU  - Bian, Feng
AU  - Durham, Robert A.
AU  - Schwarz, Roy D.
AU  - Roher, Alex E.
AU  - Walker, Lary C.
TI  - Evidence for Seeding of β-Amyloid by Intracerebral Infusion of Alzheimer Brain Extracts in β-Amyloid Precursor Protein-Transgenic Mice
AID  - 10.1523/JNEUROSCI.20-10-03606.2000
DP  - 2000 May 15
TA  - The Journal of Neuroscience
PG  - 3606--3611
VI  - 20
IP  - 10
4099  - http://www.jneurosci.org/content/20/10/3606.short
4100  - http://www.jneurosci.org/content/20/10/3606.full
SO  - J. Neurosci.2000 May 15; 20
AB  - Many neurodegenerative diseases are associated with the abnormal sequestration of disease-specific proteins in the brain, but the events that initiate this process remain unclear. To determine whether the deposition of the β-amyloid peptide (Aβ), a key pathological feature of Alzheimer's disease (AD), can be induced in vivo, we infused dilute supernatants of autopsy-derived neocortical homogenates from Alzheimer's patients unilaterally into the hippocampus and neocortex of 3-month-old β-amyloid precursor protein (βAPP)-transgenic mice. Up to 4 weeks after the infusion there was no Aβ-deposition in the brain; however, after 5 months, the AD-tissue-injected hemisphere of the transgenic mice had developed profuse Aβ-immunoreactive senile plaques and vascular deposits, some of which were birefringent with Congo Red. There was limited deposition of diffuse Aβ also in the brains of βAPP-transgenic mice infused with tissue from an age-matched, non-AD brain with mild β-amyloidosis, but none in mice receiving extract from a young control case. Aβ deposits also were not found in either vehicle-injected or uninjected transgenic mice or in any nontransgenic mice. The results show that cerebral β-amyloid can be seededin vivo by a single inoculation of dilute AD brain extract, demonstrating a key pathogenic commonality between β-amyloidosis and other neurodegenerative diseases involving abnormal protein polymerization. The paradigm can be used to clarify the conditions that initiate in vivo β-amyloidogenesis in the brain and may yield a more authentic animal model of Alzheimer's disease and other neurodegenerative disorders.