Mercury can cross blood-brain barrier

[Guest guest]

- Arnoldgore

Mercury can cross blood-brain barrier

Hi all,As you know, I rarely post articles that I will be putting on my website. Iam making an exception with this one.PS Doncha wish researchers on the effects of mercury in humans cared as muchabout their subjects as those researching its effects on fish? (And had asmuch common sense?) - SMFrom Doug and Kim:Mercury Can Jump Barrier That Keeps Toxins Out Of Brain[From the American Chemical Society. Thanks to Tory Mead.]http://www.sciencedaily.com/releases/1999/09/990909080318.htmResearchers say they have found the first evidence that mercury cancircumvent the blood-brain barrier that usually prevents such toxins fromentering the brain. Their studies were with brown and rainbow trout - two ofthe most popular species for anglers and fish consumers - but may haveimplications for humans and other species as well, they say.The study was carried out by researchers at Canada's MauriceLamontagne Institute and the Swedish University of Agricultural Sciences andis published in the October 1 issue of Environmental Science and Technology,a peer-reviewed publication of the American Chemical Society, the world'slargest scientific society.The researchers found that mercury dissolved in lake and river watercan enter the nerves that connect water-exposed sensory receptors (for odor,taste, vibration and touch) to the fishes' brains. It can go directly to thebrain, they say, circumventing the blood-brain barrier, a nearly impermeablemembrane that prevents most toxins from reaching the brain.They also say this is the first study concerning mercury levels infish brains (as opposed to levels accumulated in other body areas) and thefirst time it has been established that mercury can enter fish brainsthrough sensory receptors and their connected nerves.Mercury's toxic effects on fish and human brains are well established.Fish depend on their nervous systems to find food, communicate,migrate, orient themselves and recognize predators. Dissolved mercuryusually is taken in by fish through their gills and dispersed by blood as itcirculates through the body. In most cases, little mercury accumulates inthe brain, which is protected by the blood-brain barrier. However, mercurythat does accumulate, having passed through the bloodstream or throughnerves, is concentrated in specific sites connected to primary sensorynerves critical to the function of the nervous system."Considering the importance of complex behavior in the life of fish,and the well-known deleterious effects of mercury upon the nervous system,the toxicological significance of this uptake route needs to be assessed,"said Claude Rouleau, Ph.D., a research scientist at Environment Canada'sNational Water Research Institute and the study's primary investigator(Rouleau did the work at the Swedish University of Agricultural Sciences,Uppsala, and completed it for publication while at the Maurice LamontagneInstitute-Department of Fisheries and Oceans Canada, in Mont-Joli, Quebec)."The accumulation of mercury or other toxic chemicals in the brain viawater-exposed nerve terminals may result in an alteration of these functionsand jeopardize fish survival.We believe that uptake of metals such as mercury and the subsequenttransport along sensory nerves is a process common to all fish species, andin this respect, it is possible that other toxins (such as pesticides) alsocould reach fish brains in this way and this is a subject worthy of furtherstudy."Rouleau also said that while chemicals in the brains of such fish maynot have direct human implications (people generally don't eat fish brains),the survival of these species does affect humans. "However, the fact thatmercury is transported along fish nerves can be extrapolated to humans, asnerve transport also occurs in mammals, including humans," said Rouleau."Thus, mercury and other toxins could possibly accumulate in human brainsvia nerve transport." Earlier research has shown that manganese, cadmium andmercury can be taken through the nasal mucosa of rodents and transported tothe brain through the olfactory nerves.The study's other main investigator was Professor Hans Tjalve of theSwedish University of Agricultural Sciences.The accumulated mercury was located by whole-body autoradiography(used by the pharmaceutical industry to see how drugs are distributedthroughout the body). Fish were exposed to radioactive mercury, frozen, thencut into very thin slices. The slices were exposed to X-ray film for varyingamounts of time - a few weeks to a few months.The film blackened only in areas where the radioactive metal waspresent. The method is particularly useful for obtaining information onfragile organs or tissues, such as fish brains.Sandy Mintzhttp://www.vaccinationnews.com http://www.vaccinationnews.com/Scandals/past_scandals.htm "Eternal vigilance is the price of liberty." - Wendell Phillips (1811-1884),paraphrasing John Philpot Curran (1808) http://www.909shot.com http://www.redflagsweekly.comALL INFORMATION, DATA, AND MATERIAL CONTAINED, PRESENTED, OR PROVIDED HEREIS FOR GENERAL INFORMATION PURPOSES ONLY AND IS NOT TO BE CONSTRUED ASREFLECTING THE KNOWLEDGE OR OPINIONS OF THE PUBLISHER, AND IS NOT TO BECONSTRUED OR INTENDED AS PROVIDING MEDICAL OR LEGAL ADVICE. THE DECISIONWHETHER OR NOT TO VACCINATE IS AN IMPORTANT AND COMPLEX ISSUE AND SHOULD BEMADE BY YOU, AND YOU ALONE, IN CONSULTATION WITH YOUR HEALTH CARE PROVIDER.IN ADDITION, THE FACT THAT THIS EMAIL HAS BEEN FORWARDED IN NO WAYNECESSARILY IMPLIES ENDORSEMENT OF THE POINT OF VIEW OF THE AUTHOR ORAUTHORS OF THE ARTICLE OR EMAIL.

[Guest guest]

Subj: FW: Mercury Can Jump Barrier That Keeps Toxins Out Of Brain

9/16/2003 6:29:07 PM Eastern Standard Time

sandym

ParentsofKidsAdultswithAutism,

autism_and_vaccinations , immunizations ,

ParentsofVaccineDamagedChildren

Sent from the Internet (Details)

 

 

 

Hi all,

 

As you know, I rarely post articles that I will be putting on my website. I

am making an exception with this one.

 

PS Doncha wish researchers on the effects of mercury in humans cared as much

about their subjects as those researching its effects on fish? (And had as

much common sense?) - SM

 

From Doug and Kim:

 

Mercury Can Jump Barrier That Keeps Toxins Out Of Brain

 

[From the American Chemical Society. Thanks to Tory Mead.]

 

http://www.sciencedaily.com/releases/1999/09/990909080318.htm

 

Researchers say they have found the first evidence that mercury can

circumvent the blood-brain barrier that usually prevents such toxins from

entering the brain. Their studies were with brown and rainbow trout - two of

the most popular species for anglers and fish consumers - but may have

implications for humans and other species as well, they say.

 

The study was carried out by researchers at Canada's Maurice

Lamontagne Institute and the Swedish University of Agricultural Sciences and

is published in the October 1 issue of Environmental Science and Technology,

a peer-reviewed publication of the American Chemical Society, the world's

largest scientific society.

 

The researchers found that mercury dissolved in lake and river water

can enter the nerves that connect water-exposed sensory receptors (for odor,

taste, vibration and touch) to the fishes' brains. It can go directly to the

brain, they say, circumventing the blood-brain barrier, a nearly impermeable

membrane that prevents most toxins from reaching the brain.

 

They also say this is the first study concerning mercury levels in

fish brains (as opposed to levels accumulated in other body areas) and the

first time it has been established that mercury can enter fish brains

through sensory receptors and their connected nerves.

 

Mercury's toxic effects on fish and human brains are well established.

 

Fish depend on their nervous systems to find food, communicate,

migrate, orient themselves and recognize predators. Dissolved mercury

usually is taken in by fish through their gills and dispersed by blood as it

circulates through the body. In most cases, little mercury accumulates in

the brain, which is protected by the blood-brain barrier. However, mercury

that does accumulate, having passed through the bloodstream or through

nerves, is concentrated in specific sites connected to primary sensory

nerves critical to the function of the nervous system.

 

" Considering the importance of complex behavior in the life of fish,

and the well-known deleterious effects of mercury upon the nervous system,

the toxicological significance of this uptake route needs to be assessed, "

said Claude Rouleau, Ph.D., a research scientist at Environment Canada's

National Water Research Institute and the study's primary investigator

(Rouleau did the work at the Swedish University of Agricultural Sciences,

Uppsala, and completed it for publication while at the Maurice Lamontagne

Institute-Department of Fisheries and Oceans Canada, in Mont-Joli, Quebec).

 

" The accumulation of mercury or other toxic chemicals in the brain via

water-exposed nerve terminals may result in an alteration of these functions

and jeopardize fish survival.

 

We believe that uptake of metals such as mercury and the subsequent

transport along sensory nerves is a process common to all fish species, and

in this respect, it is possible that other toxins (such as pesticides) also

could reach fish brains in this way and this is a subject worthy of further

study. "

 

Rouleau also said that while chemicals in the brains of such fish may

not have direct human implications (people generally don't eat fish brains),

the survival of these species does affect humans. " However, the fact that

mercury is transported along fish nerves can be extrapolated to humans, as

nerve transport also occurs in mammals, including humans, " said Rouleau.

 

" Thus, mercury and other toxins could possibly accumulate in human brains

via nerve transport. " Earlier research has shown that manganese, cadmium and

mercury can be taken through the nasal mucosa of rodents and transported to

the brain through the olfactory nerves.

 

The study's other main investigator was Professor Hans Tjalve of the

Swedish University of Agricultural Sciences.

 

The accumulated mercury was located by whole-body autoradiography

(used by the pharmaceutical industry to see how drugs are distributed

throughout the body). Fish were exposed to radioactive mercury, frozen, then

cut into very thin slices. The slices were exposed to X-ray film for varying

amounts of time - a few weeks to a few months.

 

The film blackened only in areas where the radioactive metal was

present. The method is particularly useful for obtaining information on

fragile organs or tissues, such as fish brains.

 

 

Sandy Mintz

http://www.vaccinationnews.com

http://www.vaccinationnews.com/Scandals/past_scandals.htm

 

" Eternal vigilance is the price of liberty. " - Wendell Phillips (1811-1884),

paraphrasing John Philpot Curran (1808)

 

http://www.909shot.com

http://www.redflagsweekly.com

 

ALL INFORMATION, DATA, AND MATERIAL CONTAINED, PRESENTED, OR PROVIDED HERE

IS FOR GENERAL INFORMATION PURPOSES ONLY AND IS NOT TO BE CONSTRUED AS

REFLECTING THE KNOWLEDGE OR OPINIONS OF THE PUBLISHER, AND IS NOT TO BE

CONSTRUED OR INTENDED AS PROVIDING MEDICAL OR LEGAL ADVICE. THE DECISION

WHETHER OR NOT TO VACCINATE IS AN IMPORTANT AND COMPLEX ISSUE AND SHOULD BE

MADE BY YOU, AND YOU ALONE, IN CONSULTATION WITH YOUR HEALTH CARE PROVIDER.

 

IN ADDITION, THE FACT THAT THIS EMAIL HAS BEEN FORWARDED IN NO WAY

NECESSARILY IMPLIES ENDORSEMENT OF THE POINT OF VIEW OF THE AUTHOR OR

AUTHORS OF THE ARTICLE OR EMAIL.

 

 

 

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