Scientists have been aware of aluminum’s neurotoxicity for decades. Although aluminum’s apologists have tried to shroud the metal’s risks in manufactured controversy, a growing number of reports by researchers in the United KingdomFranceCanadaIsrael, the U.S. and elsewhere has furnished substantive evidence linking aluminum to neuropathology, including the epidemics of Alzheimer’s disease (AD) and autism spectrum disorder (ASD).

Aluminum levels were particularly high in the male brains, including in a 15-year-old boy with ASD who had the study’s single highest brain aluminum measurement.

Dr. Christopher Exley—one of the world’s leading experts on aluminum toxicity—has shown that chronic intoxication with myriad forms of this “ubiquitous and omnipresent metal” is exacting a high price on human health. Dr. Exley and other aluminum experts such as molecular biologist Dr. Lucija Tomljenovic have confirmed that aluminum readily and actively traverses the blood-brain barrier to selectively accumulate in brain tissues, where it induces unwelcome changes in brain biochemistry. As Dr. Exley has noted, “There are no ‘normal’ levels of brain aluminum,” meaning that “its presence in brain tissue, at any level, could be construed as abnormal” [emphasis added].

Documenting Aluminum in the ASD Brain

In light of the fact that even minute amounts of aluminum can have adverse neurological consequences, Dr. Exley’s newest paper—which reports on the first-ever study of aluminum in ASD brain tissue—is groundbreaking. Published in the Journal of Trace Elements in Medicine and Biology, the paper documents some of the highest values for aluminum in human brain tissue ever recorded. Using a two-pronged study design (see box), the researchers measured and characterized aluminum deposits in brain tissues from five to ten ASD donors, most of whom died in their teens or twenties.

Study DesignQuantitative component: First, the investigators used graphite furnace atomic absorption spectrometry (GRAAS) to measure aluminum content in frozen brain tissue samples. Frozen tissue was available from one female donor (age 44) and four male donors (ages 15, 22, 33 and 50) who, when alive, had a confirmed ASD diagnosis. The researchers quantified aluminum levels in 59 tissue samples representing five different areas of the brain (frontal, parietal, occipital, temporal and hippocampal).Qualitative component: Using a technique called fluorescence microscopy, the researchers visualized aluminum deposits according to their presence (a) insideversus outside the brain cells and (b) in the two types of brain tissue (grey matterversus white matter). For this component, fixed tissue samples were available for the same five donors plus an additional five donors diagnosed with ASD, including two females (ages 13 and 29) and three males (ages 14, 22 and 29).

What the research team found was startling. The study’s quantitative arm documented “consistently high” aluminum levels representing “some of the highest values for brain aluminum content ever measured in healthy or diseased tissues.” Specifically:

  • All five individuals had at least one brain tissue with a “pathologically significant” level of aluminum, defined as greater than or equal to 3.00 micrograms per gram of dry brain weight (μg/g dry wt). (Dr. Exley and colleagues developed categories to classify aluminum-related pathology after conducting other brain studies, wherein older adults who died healthy had less than 1 μg/g dry wt of brain aluminum.)
  • Roughly two-thirds (67%) of all the tissue samples displayed a pathologically significant aluminum content.
  • Aluminum levels were particularly high in the male brains, including in a 15-year-old boy with ASD who had the study’s single highest brain aluminum measurement (22.11 μg/g dry wt)—many times higher than the pathologically significant threshold and far greater than levels that might be considered as acceptable even for an aged adult.
  • Some of the elevated aluminum levels rivaled the very high levels historically reported in victims of dialysis encephalopathy syndrome (a serious iatrogenic disorder resulting from aluminum-containing dialysis solutions).

The study’s qualitative findings were equally concerning:

  • Across the 10 donors, the investigators identified 150 aluminum deposits. All 10 donors had aluminum deposits in at least one tissue.
  • Aluminum deposits were markedly more prevalent in males than females (129 deposits in seven males, averaging over 18 deposits each, versus 21 deposits in three females, for an average of 7).
  • In males, most aluminum deposits were inside cells (80/129), whereas aluminum deposits in females were primarily extracellular (15/21). The majority of intracellular aluminum was inside non-neuronal cells (microglia and astrocytes).
  • Aluminum was present in both grey matter (88 deposits) and white matter (62 deposits). (The brain’s grey matter serves to process information, while the white matter provides connectivity.)
  • The researchers also identified aluminum-loaded lymphocytes in the meninges (the layers of protective tissue that surround the brain and spinal cord) and in similar inflammatory cells in the vasculature, furnishing evidence of aluminum’s entry into the brain “via immune cells circulating in the blood and lymph” and perhaps explaining how youth with ASD came to acquire such shockingly high levels of brain aluminum.

The Importance of Glial Cells

There are three broad categories of non-neuronal (glial) cells, including astrocytes (which support neuronal signaling), oligodendrocytes (which create myelin) and microglia (responsible for repairing damage). In discussing their results, Dr. Exley’s team comments that the intracellular location of most of the aluminum in these non-neuronal cells was the “standout observation” for ASD.

 

Source: http://www.collective-evolution.com/2017/11/29/some-of-the-highest-values-for-brain-aluminum-content-ever-measured-found-in-people-with-autism/?utm_source=feedburner&utm_medium=email&utm_campaign=Feed%3A+Collective-evolution+%28Collective+Evolution%29

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2 COMMENTS

  1. People cook with aluminum, including aluminum foil (especially when eating fast food (which are slow poisons), they use under arm deodorant that contains aluminum. The skies are sprayed with aluminum and most salts have artificial aluminum, not the naturally occurring aluminum that is in natural minerals. So, if you purchase processed foods and they list salt as an ingredient, you are getting aluminum there too, unless it is sea salt or Himulanian (sp?) Pizzas, hot dogs, etc. are loaded with aluminum and even the FDA has stated that they cause cancers. If what you are buying lists salt – you are getting toxic aluminum – avoid!!!!

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