Low lead levels delivered to monkeys through formula feeding caused
Alzheimer's type brain plaque.
http://www.newscientist.com/channel/health/mg19726384.400?DCMP=NLC-nletterba
nner&nsref=mg19726384.400

http://tinyurl.com/2ptukp

Lead exposure may be a factor in Alzheimer's
. 12 January 2008 
. THE toxic effects of lead could be more far-reaching than we thought.
Monkeys exposed to the heavy metal during infancy may be predisposed to
develop the equivalent of Alzheimer's disease. 
"We're not saying that lead exposure causes Alzheimer's disease, but it's a
risk factor," says Nasser Zawia of the University of Rhode Island in
Kingston, whose team discovered the link. 
Zawia's team fed baby monkeys infant formula milk laced with low levels of
lead, then followed their progress until the age of 23. While the adult
monkeys did not show symptoms of Alzheimer's per se, post-mortem analyses of
their brains showed that the lead-fed monkeys had plaques and other
abnormalities identical to those found in the brains of people with
Alzheimer's. 
What's more, comparative analysis of RNA in their brains showed three key
genes linked with Alzheimer's disease were 50 to 100 per cent more active in
lead-fed monkeys than ...[subscribers can read the rest--if you do, please
post]


Lead delivery can be from tainted water.  Lead leaches out of the solder of
pipes in old homes when silicofluorides are added to the water.  Powdered
formula is made with this *optimally fluoridated* city water and fed to
human infants on a large scale on a daily basis.  75% of US tap water now
contains this chemical.
Judy

http://www.ncbi.nlm.nih.gov/pubmed/11233755?dopt=Abstract
Association of silicofluoride treated water with elevated blood lead.
Masters RD, Coplan MJ, Hone BT, Dykes JE.
Foundation for Neuroscience and Society, Dartmouth College, Hanover, NH
03755-3547, USA. [log in to unmask]

Previous epidemiological studies have associated silicofluoride-treated
community water with enhanced child blood lead parameters. Chronic,
low-level dosage of silicofluoride (SiF) has never been adequately tested
for health effects in humans. We report here on a statistical study of
151,225 venous blood lead (VBL) tests taken from children ages 0-6
inclusive, living in 105 communities of populations from 15,000 to 75,000.
The tests are part of a sample collected by the New York State Department of
Children's Health, mostly from 1994-1998. Community fluoridation status was
determined from the CDC 1992 Fluoridation Census. Covariates were assigned
to each community using the 1990 U.S. Census. Blood lead measures were
divided into groups based on race and age. Logistic regressions were carried
out for each race/age group, as well as above and below the median of 7
covariates to test the relationship between known risk factors for lead
uptake, exposure to SiF-treated water, and VBL >10 microg/dL. RESULTS: For
every age/race group, there was a consistently significant association of
SiF treated community water and elevated blood lead. Logistic regressions
above and below the median value of seven covariates show an effect of
silicofluoride on blood lead independent of those covariates. The highest
likelihood of children having VBL> 10 microg/dL occurs when they are both
exposed to SiF treated water and likely to be subject to another risk factor
known to be associated with high blood lead (e.g., old housing). Results are
consistent with prior analyses of surveys of children's blood lead in
Massachusetts and NHANES III. These data contradict the null hypothesis that
there is no difference between the toxic effects of SiF and sodium fluoride,
pointing to the need for chemical studies and comprehensive animal testing
of water treated with commercial grade silicofluorides.

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