Do Prions Exist?, page 1
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reply posted on 14-11-2005 @ 09:52 AM by mattison0922
Originally posted by thermopolis
www.pbs.org...

There is no science that this lump of protein does anything whatsoever. Prions are BS. Mad cow is a fake just like bird flu.............

This is pretty ridiculous. Prions don't exist because some yahoo on PBS's website doesn't understand the mechanism. Please.

So it doesn't make sense to this person, it invalidates Prusiner's hypothesis? If this individual is so sure of him self, perhaps he should submit a letter to a journal refuting Prusiner's hypothesis... not posting stuff on the web.

Do you actually know anything about Prions other than what you've read on this site?

This individuals lack of understanding is perfectly demonstrated via the following statement
Overall I think the existing data about T.S.E. diseases and their causal agents are best explained by proposing that a nucleic acid or some other informational molecule does carry all the information required by their agents. The prion hypothesis does not adequately address the question of how all this information can be encoded.

Nucleic acid does in fact carry the information necessary to construct the protein. This is not a dilemma at all. The issue of information is somewhat moot. The information is there and it's corrupt. The question is WHY is it corrupt. Despite what this PBS website might say. The answer has to do with energy minima. The prion proteins quite simply have more than one energy minima state they can occupy. It would appear that the non-TSE version is the preferred conformation, but the disease causing form is a secondary option that is likely harder to get to but orders of magnitude more stable. The information problem that this person describes is a problem only for him and his apparent lack of understanding with respect to the central dogma of biology...

Sofi... I am sure you've got some more concrete links you can add to this discussion.


reply posted on 14-11-2005 @ 10:20 AM by soficrow
Originally posted by HowardRoark
Originally posted by soficrow
President Bush was so concerned about prions that he made them "Select Agents" under the 2002 Bioterrorism Act. Now, it is an act of treason for US scientists to speak publicly about these agents. So you won't be getting any argument from the scientific community in the USA.


Can you please point out the page on this copy of the
Bioterroism Act of 2002 that details those claims?




The constraints are established by the combination of Acts and Executive Orders - the main Gag Order is in the amendment to Executive Order 12958.

I covered most of these issues long ago, here:

U.S. Still Silencing Scientists


More supporting info:

* Interesting testimony before the Judiciary Committee:
commdocs.house.gov...
* Bill Summary and status:
www.congress.gov...:H.R.339
* Current text:
www.congress.gov...:4:./temp/~c108KV7HDS

“Mad cow as bioterrorism? Scientists worry that US gov't classification of BSE prions as ‘select agents’ could hinder research”
www.biomedcentral.com...

“US blocking prion research”
www.biomedcentral.com...

“US amends ‘select agent’ regs,” The Scientist, November 10, 2003. J.M. Perkel,
www.biomedcentral.com...

* Bioterrorism Preparedness and Response Act of 2002
www.aphis.usda.gov...


reply posted on 14-11-2005 @ 10:22 AM by thermopolis
www.uspharmacist.com.../files/Feat/ACF2F0A.cfm&pub_id=8&article_id=43

Human Diseases

Kuru: Kuru is an obscure disease that was seen only among the Fore highlanders of New Guinea. This strange, fatal disease was marked by ataxia (loss of coordination) and often later by dementia. The affected individuals acquired kuru through ritual cannibalism; the Fore tribe had honored their dead by eating their brains.6 Because men in the tribe did not partake in the practice, the disease was almost exclusively found in women and young children. The disease annually afflicted about 1% of the total Fore population of about 30,000, some 300 cases per year. In the worst hit Fore settlements the incidence reached an astonishing 5% to 10%.

For those stricken with the disease, death came cruelly. The victims lost the ability to swallow and starved, or succumbed before starvation to pneumonia or to the deep, gangrenous bedsores they developed lying in their own urine or excrement.2 Fortunately, the practice of cannibalism in New Guinea has stopped, and kuru has virtually disappeared.

Creutzfeldt-Jakob Disease (CJD): A rare but deadly infectious human encephalopathy with an incidence of one to two cases per million people worldwide, Creutzfeldt-Jakob disease is uniformly fatal, with 90% of patients dying within the first year. CJD was first described in the early 1920s and classified with other degenerative brain diseases; its infectious nature was not established until 1968.

Clinically, the disease is manifested by a rapidly progressive dementia with associated neurological deficits and ataxia.7 Dementia advances rapidly, vision is impaired and muscle twitching becomes more obvious. Death occurs soon after. Histological examination of the brain at autopsy shows patchy spongiform changes in the cerebral hemispheres and a considerable loss of nerve cells in the occipital cortex. Fortunately, a new test is available which may be useful for diagnosing CJD when symptoms suggest that illness. The test will be especially helpful in distinguishing CJD from Alzheimer’s disease.

Creutzfeldt-Jakob disease occurs sporadically worldwide. It typically strikes those in their 60s. About 10%–15% of cases are inherited. Unfortunately, a small number of cases are spread during the process of treating another medical problem. The disease has apparently been transmitted by corneal transplantation, implantation of dura mater or electrodes in the brain, use of contaminated surgical instruments and injection of growth hormone derived from human pituitary glands.6 It has also been suggested that CJD might be transmitted by blood transfusion. Recently, amid mounting concern, blood bank personnel began asking donors if anyone in their family ever suffered from this brain disorder."

OK, so I lied. Yes Prions are real............Bush is hiding the truth from the public to keep panic down. All meat is tained............


reply posted on 14-11-2005 @ 10:28 AM by Nygdan
Originally posted by thermopolis
There is no science that this lump of protein does anything whatsoever. Prions are BS. Mad cow is a fake just like bird flu

Do you have a single study or anything remotely reasonable to suggest that they don't exist?

Science. 1991 Jun 14;252(5012):1515-22. Molecular biology of prion diseases.
Conversion of alpha-helices into beta-sheets features in the formation of the scrapie prion proteins. Proc Natl Acad Sci U S A. 1993 Dec 1;90(23):10962-6.
The cellular prion protein binds copper in vivo Nature 390, 684 - 687 (18 December 1997)
Prion diseases of humans and animals: their causes and molecular basis Annu Rev Neurosci. 2001;24:519-50.
Prion (PrPSc)-specific epitope defined by a monoclonal antibody Nature 390, 74 - 77 (06 November 1997)
Neurotoxicity of a prion protein fragment Nature 362, 543 - 546 (08 April 1993)
Transgenetic studies implicate interactions between homologous PrP isoforms in scrapie prion replication. Cell. 1990 Nov 16;63(4):673-86.
Prion protein (PrP) with amino-proximal deletions restoring susceptibility of PrP knockout mice to scrapie EMBO Journal Vol 15, pp.1255-1264, 1996
Telling, G. C. et al. Evidence for the conformation of the pathologic isoform of the prion protein enciphering and propagating prion diversity. Science 274, 2079-2082 (19960
Peretz, D. et al. A conformational transition at the N-terminus of the prion protein features in formation of the scrapie isoform. J. Mol. Biol. 273, 614-622 (1997).
Butler, D. A. et al. Scrapie-infected murine neuroblastoma cells produce protease-resistant prion proteins. J. Virol. 62, 1558-1564 (1988).

I wouldn't say that anything in science is closed to debate, and certainly there is a lot of debate about prions, but it's on a slightly higher level than 'its government lies and bull#'

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