Thursday, June 29, 2017

PRION 2017 CONFERENCE DECIPHERING NEURODEGENERATIVE DISORDERS VIDEO

thought everyone would like to watch this...kind regards, terry

Subject: PRION 2017 CONFERENCE DECIPHERING NEURODEGENERATIVE DISORDERS VIDEO

PRION 2017 CONFERENCE DECIPHERING NEURODEGENERATIVE DISORDERS

PRION 2017 CONFERENCE VIDEO

https://www.youtube.com/embed/Vtt1kAVDhDQ


Chronic Wasting Disease CWD TSE Prion to Humans, who makes that final call, when, or, has it already happened?

TUESDAY, JUNE 13, 2017

PRION 2017 CONFERENCE ABSTRACT First evidence of intracranial and peroral transmission of Chronic Wasting Disease (CWD) into Cynomolgus macaques: a work in progress

http://chronic-wasting-disease.blogspot.com/2017/06/prion-2017-conference-abstract-first.html

Subject: PRION 2017 CONFERENCE ABSTRACT First evidence of intracranial and peroral transmission of Chronic Wasting Disease (CWD) into Cynomolgus macaques: a work in progress

First evidence of intracranial and peroral transmission of Chronic Wasting Disease (CWD) into Cynomolgus macaques: a work in progress
 
Stefanie Czub1, Walter Schulz-Schaeffer2, Christiane Stahl-Hennig3, Michael Beekes4, Hermann Schaetzl5 and Dirk Motzkus6 1 

University of Calgary Faculty of Veterinary Medicine/Canadian Food Inspection Agency; 2Universitatsklinikum des Saarlandes und Medizinische Fakultat der Universitat des Saarlandes; 3 Deutsches Primaten Zentrum/Goettingen; 4 Robert-Koch-Institut Berlin; 5 University of Calgary Faculty of Veterinary Medicine; 6 presently: Boehringer Ingelheim Veterinary Research Center; previously: Deutsches Primaten Zentrum/Goettingen 

This is a progress report of a project which started in 2009. 21 cynomolgus macaques were challenged with characterized CWD material from white-tailed deer (WTD) or elk by intracerebral (ic), oral, and skin exposure routes. Additional blood transfusion experiments are supposed to assess the CWD contamination risk of human blood product. Challenge materials originated from symptomatic cervids for ic, skin scarification and partially per oral routes (WTD brain). Challenge material for feeding of muscle derived from preclinical WTD and from preclinical macaques for blood transfusion experiments. We have confirmed that the CWD challenge material contained at least two different CWD agents (brain material) as well as CWD prions in muscle-associated nerves. 

Here we present first data on a group of animals either challenged ic with steel wires or per orally and sacrificed with incubation times ranging from 4.5 to 6.9 years at postmortem. Three animals displayed signs of mild clinical disease, including anxiety, apathy, ataxia and/or tremor. In four animals wasting was observed, two of those had confirmed diabetes. All animals have variable signs of prion neuropathology in spinal cords and brains and by supersensitive IHC, reaction was detected in spinal cord segments of all animals. Protein misfolding cyclic amplification (PMCA), real-time quaking-induced conversion (RT-QuiC) and PET-blot assays to further substantiate these findings are on the way, as well as bioassays in bank voles and transgenic mice. 

At present, a total of 10 animals are sacrificed and read-outs are ongoing. Preclinical incubation of the remaining macaques covers a range from 6.4 to 7.10 years. Based on the species barrier and an incubation time of > 5 years for BSE in macaques and about 10 years for scrapie in macaques, we expected an onset of clinical disease beyond 6 years post inoculation. 

PRION 2017 DECIPHERING NEURODEGENERATIVE DISORDERS

Notice to Members Regarding Chronic Wasting Disease (CWD)

Posted on: May 31st, 2017 

To: MNA Members From: Métis Nation of Alberta 

Date: Wednesday, May 31, 2017 

*** Métis Nation of Alberta (MNA) was made aware of a recent Canadian research study examining the transmission of Chronic Wasting Disease. The initial results of the study indicate that macaque monkeys (genetically similar to humans) can be infected with Chronic Wasting Disease (CWD) after eating deer that is infected with CWD. CWD is a prion disease, which are fatal, transmissible diseases characterized by abnormal proteins in the brain and nervous system. To date no research has shown that CWD can be passed on to humans, and no human cases of CWD have ever been identified. However, this new research indicates that it is a possibility. The Deputy Chief Medical Officer of Health has reached out to us to share with our Métis harvesters this important information. For more information you can visit:

http://aep.alberta.ca/fish-wildlife/wildlife-diseases/chronic-wasting-disease/cwd-updates/default.aspx

and

www.nwhc.usgs.gov/disease_information/chronic_wasting_disease/index.jsp.

What the Alberta Government knows: 

CWD is present in southeastern Alberta, with the area slowly spreading westward over time (introduced into Alberta from Saskatchewan) – see map for more information at 

http://aep.alberta.ca/fish-wildlife/fishing-hunting-trapping/hunting-alberta/documents/HuntersCWD-HarvestedDeerHeads-2016.pdf

CWD circulates in deer populations, particularly mule deer; it has been found in about 4% of deer tested in 2016; Elk can be infected in areas where CWD has been present in deer for a long period of time; Moose can also be infected, but this would be fairly rare. Necessary Precautions for Harvesters: Hunters and others who handle carcasses follow basic handling precautions (available here 

http://aep.alberta.ca/fish-wildlife/fishing-hunting-trapping/hunting-alberta/documents/CWDGuidelines-DeerCarcassTransportationHandling-Oct2009.pdf

All deer, moose and elk harvested from CWD mandatory submission wildlife management units (WMUs) be tested for CWD; and A negative result (no CWD detected by the test) must be obtained before any part of an animal is eaten. 

For more information, contact: Amy Quintal Métis Nation of Alberta Métis Harvesting Liaison Tel: (780) 455 – 2200 aquintal@metis.org

http://albertametis.com/2017/05/notice-members-regarding-chronic-wasting-disease-cwd/

Chronic Wasting Disease: CFIA Research Summary 

Embargoed until May 23, 2017 

(OCR of a scanned original) 

Research Findings 

Chronic Wasting Disease (CWD) is a progressive, fatal disease of the nervous system of cervids including deer, elk, moose, and reindeer that is caused by abnormal proteins called prions. It is known as a transmissible spongiform encephalopathy (TSE). Other TSEs include scrapie in sheep, bovine spongiform encephalopathy (BSE) in cattle, and Creutzfeldt-Jakob disease (CJD) in humans.

A limited number of experimental studies have demonstrated that non-human primates, specifically squirrel monkeys, are susceptible to CWD prions. An ongoing research study has now shown that CWD can also be transmitted to macaques, which are genetically closer to humans. 

The study led by Dr. Stefanie Czub, a scientist at the Canadian Food Inspection Agency (CFIA), and funded by the Alberta Prion Research institute has demonstrated that by orally administering material under experimental conditions from cervids (deer and elk) naturally infected with CWD, the disease can be transmitted to macaques. 

in this project, which began in 2009, 18 macaques were exposed to CWD in a variety of ways: by injecting into the brain, through contact with skin, oral administration, and intravenously (into the bloodstream through veins). So far, results are available from 5 animals. At this point, two animals that were exposed to CWD by direct introduction into the brain, one that was administered infected brain material by oral administration and two that were given infected muscle by oral administration have become infected with CWD. The study is ongoing and testing continues in the remaining animals. The early results will be presented at PRlON 2017, the annual international conference on prion diseases, in Edinburgh, Scotland, May 23 to 26, 2017. 

Potential impacts of the new finding

Since 2003 Canada has a policy that recommends that animals and materials known to be infected with prions be removed from the food chain and from health products. Although no direct evidence of CWD prion transmission to humans has ever been recorded, the policy advocates a precautionary approach to managing CWD and potential human exposure to prions. These initial findings do not change Health Canada’s Health Products and Food Branch (HPFB) position on food and health products. A precautionary approach is still recommended to manage the potential risks of exposure to prions through food and health products. Measures are in place at federal, provincial and territorial levels to reduce human exposure to products potentially contaminated by CWD by preventing known infected animals from entering the marketplace. 

While Federal and P/T government’s animal disease control policies continue to divert known CWD-infected animals away from entering the food and feed supply, research and development of sensitive detection methods including live-animal sampling techniques remain crucial for ensuring an accurate diagnosis. In addition, consistent federal, provincial and territorial communications of appropriate precautionary measures for hunters and indigenous communities are required. 

Next Steps

The CFlA will continue to collaborate with national and international partners to develop and validate new diagnostic techniques. The CFlA will also continue to offer confirmatory testing services and reference laboratory expertise to provincial and territorial partners on demand. 

Currently, CFlA laboratories are leading or collaborating on several research projects to understand the potential for CWD to infect humans. These projects use non‐human primates, genetically modified mice, and cell-free amplification approaches. Given the present findings, CFiA encourages continued research into TSEs. 

The results of this study reinforce the need to redesign the federal program to foster greater adoption of risk mitigation measures for farmed cervids. Federal and provincial government collaboration will continue as new program options are assessed. 

The results of Dr. Czub’s research into CWD will be of interest to scientists, governments, industry and people who consume cervid products. After the presentation at PRION 2017, the research will follow the normal steps of completion, peer review and publication. The Government of Canada will monitor the response to this research and determine whether further review of the science is required. Other studies underway by other researchers may also become public as a result of the presentation of Dr. Czub’s research. 

The Public Health Agency of Canada, Health Canada, CFlA and other Federal partners are working together to assess what policies or programs need further review as well as preparing other communications about the research and health policy and advice to Canadian. 2017/04/28 

===end...UNOFFICIAL...NO URL LINK...TSS===UPDATE, THE ABOVE INTERNAL DOCUMENT HAS NOW BEEN CONFIRMED, but still no link...TSS===

TUESDAY, JUNE 13, 2017

PRION 2017 CONFERENCE ABSTRACT First evidence of intracranial and peroral transmission of Chronic Wasting Disease (CWD) into Cynomolgus macaques: a work in progress


FRIDAY, JUNE 16, 2017

P55 Susceptibility of human prion protein to in vitro conversion by chronic wasting disease prions


SATURDAY, JUNE 10, 2017

Chronic Wasting Disease CWD TSE Prion to Humans, who makes that final call, when, or, has it already happened?


TUESDAY, JUNE 13, 2017

PRION 2017 CONFERENCE ABSTRACT Chronic Wasting Disease in European moose is associated with PrPSc features different from North American CWD


TUESDAY, JUNE 20, 2017

*** Norway Confirms 6th Case of Skrantesjuke CWD TSE Prion Disease ***


MONDAY, JUNE 19, 2017 

PRION 2017 P20 Descriptive epidemiology of human prion diseases in Japan: a prospective 16-year surveillance study

Japan Prion Disease Increasing Annually to 2.3 patients per 1 million populations in 2014

http://creutzfeldt-jakob-disease.blogspot.com/2017/06/prion-2017-p20-descriptive-epidemiology.html

Saturday, June 17, 2017

PRION 2017 P115 α- Synuclein prions from MSA patients exhibit similar transmission properties as PrPSc prions



SPONTANEOUS ATYPICAL BOVINE SPONGIFORM ENCEPHALOPATHY

***Moreover, sporadic disease has never been observed in breeding colonies or primate research laboratories, most notably among hundreds of animals over several decades of study at the National Institutes of Health25, and in nearly twenty older animals continuously housed in our own facility.***

Saturday, April 23, 2016 

PRION 2016 TOKYO Saturday, April 23, 2016 

SCRAPIE WS-01: Prion diseases in animals and zoonotic potential 2016 Prion. 10:S15-S21. 2016 ISSN: 1933-6896 printl 1933-690X online Taylor & Francis Prion 2016 Animal Prion Disease Workshop 

Abstracts 

WS-01: Prion diseases in animals and zoonotic potential 

Juan Maria Torres a, Olivier Andreoletti b, J uan-Carlos Espinosa a. Vincent Beringue c. Patricia Aguilar a, Natalia Fernandez-Borges a. and Alba Marin-Moreno a "Centro de Investigacion en Sanidad Animal ( CISA-INIA ). Valdeolmos, Madrid. Spain; b UMR INRA -ENVT 1225 Interactions Holes Agents Pathogenes. ENVT. Toulouse. France: "UR892. Virologie lmmunologie MolécuIaires, Jouy-en-Josas. France 

Dietary exposure to bovine spongiform encephalopathy (BSE) contaminated bovine tissues is considered as the origin of variant Creutzfeldt Jakob (vCJD) disease in human. To date, BSE agent is the only recognized zoonotic prion. Despite the variety of Transmissible Spongiform Encephalopathy (TSE) agents that have been circulating for centuries in farmed ruminants there is no apparent epidemiological link between exposure to ruminant products and the occurrence of other form of TSE in human like sporadic Creutzfeldt Jakob Disease (sCJD). However, the zoonotic potential of the diversity of circulating TSE agents has never been systematically assessed. The major issue in experimental assessment of TSEs zoonotic potential lies in the modeling of the ‘species barrier‘, the biological phenomenon that limits TSE agents’ propagation from a species to another. In the last decade, mice genetically engineered to express normal forms of the human prion protein has proved essential in studying human prions pathogenesis and modeling the capacity of TSEs to cross the human species barrier. To assess the zoonotic potential of prions circulating in farmed ruminants, we study their transmission ability in transgenic mice expressing human PrPC (HuPrP-Tg). Two lines of mice expressing different forms of the human PrPC (129Met or 129Val) are used to determine the role of the Met129Val dimorphism in susceptibility/resistance to the different agents. These transmission experiments confirm the ability of BSE prions to propagate in 129M- HuPrP-Tg mice and demonstrate that Met129 homozygotes may be susceptible to BSE in sheep or goat to a greater degree than the BSE agent in cattle and that these agents can convey molecular properties and neuropathological indistinguishable from vCJD. However homozygous 129V mice are resistant to all tested BSE derived prions independently of the originating species suggesting a higher transmission barrier for 129V-PrP variant. Transmission data also revealed that several scrapie prions propagate in HuPrP-Tg mice with efficiency comparable to that of cattle BSE. While the efficiency of transmission at primary passage was low, subsequent passages resulted in a highly virulent prion disease in both Met129 and Val129 mice. Transmission of the different scrapie isolates in these mice leads to the emergence of prion strain phenotypes that showed similar characteristics to those displayed by MM1 or VV2 sCJD prion. 

***These results demonstrate that scrapie prions have a zoonotic potential and raise new questions about the possible link between animal and human prions.


Title: Transmission of scrapie prions to primate after an extended silent incubation period) *** 

In complement to the recent demonstration that humanized mice are susceptible to scrapie, we report here the first observation of direct transmission of a natural classical scrapie isolate to a macaque after a 10-year incubation period. Neuropathologic examination revealed all of the features of a prion disease: spongiform change, neuronal loss, and accumulation of PrPres throughout the CNS. 

*** This observation strengthens the questioning of the harmlessness of scrapie to humans, at a time when protective measures for human and animal health are being dismantled and reduced as c-BSE is considered controlled and being eradicated. 

*** Our results underscore the importance of precautionary and protective measures and the necessity for long-term experimental transmission studies to assess the zoonotic potential of other animal prion strains. 


SCRAPIE WS-01: Prion diseases in animals and zoonotic potential 2016 

Prion. 10:S15-S21. 2016 ISSN: 1933-6896 printl 1933-690X online 



O.05: Transmission of prions to primates after extended silent incubation periods: Implications for BSE and scrapie risk assessment in human populations 

Emmanuel Comoy, Jacqueline Mikol, Valerie Durand, Sophie Luccantoni, Evelyne Correia, Nathalie Lescoutra, Capucine Dehen, and Jean-Philippe Deslys Atomic Energy Commission; Fontenay-aux-Roses, France 

Prion diseases (PD) are the unique neurodegenerative proteinopathies reputed to be transmissible under field conditions since decades. The transmission of Bovine Spongiform Encephalopathy (BSE) to humans evidenced that an animal PD might be zoonotic under appropriate conditions. Contrarily, in the absence of obvious (epidemiological or experimental) elements supporting a transmission or genetic predispositions, PD, like the other proteinopathies, are reputed to occur spontaneously (atpical animal prion strains, sporadic CJD summing 80% of human prion cases). Non-human primate models provided the first evidences supporting the transmissibiity of human prion strains and the zoonotic potential of BSE. Among them, cynomolgus macaques brought major information for BSE risk assessment for human health (Chen, 2014), according to their phylogenetic proximity to humans and extended lifetime. We used this model to assess the zoonotic potential of other animal PD from bovine, ovine and cervid origins even after very long silent incubation periods. 

*** We recently observed the direct transmission of a natural classical scrapie isolate to macaque after a 10-year silent incubation period, 

***with features similar to some reported for human cases of sporadic CJD, albeit requiring fourfold long incubation than BSE. Scrapie, as recently evoked in humanized mice (Cassard, 2014), 

***is the third potentially zoonotic PD (with BSE and L-type BSE), 

***thus questioning the origin of human sporadic cases. We will present an updated panorama of our different transmission studies and discuss the implications of such extended incubation periods on risk assessment of animal PD for human health. 

=============== 

***thus questioning the origin of human sporadic cases*** 

***our findings suggest that possible transmission risk of H-type BSE to sheep and human. Bioassay will be required to determine whether the PMCA products are infectious to these animals. 


LOOKING FOR CWD IN HUMANS AS nvCJD or as an ATYPICAL CJD, LOOKING IN ALL THE WRONG PLACES $$$ 

*** These results would seem to suggest that CWD does indeed have zoonotic potential, at least as judged by the compatibility of CWD prions and their human PrPC target. Furthermore, extrapolation from this simple in vitro assay suggests that if zoonotic CWD occurred, it would most likely effect those of the PRNP codon 129-MM genotype and that the PrPres type would be similar to that found in the most common subtype of sCJD (MM1).*** 




*** The potential impact of prion diseases on human health was greatly magnified by the recognition that interspecies transfer of BSE to humans by beef ingestion resulted in vCJD. While changes in animal feed constituents and slaughter practices appear to have curtailed vCJD, there is concern that CWD of free-ranging deer and elk in the U.S. might also cross the species barrier. Thus, consuming venison could be a source of human prion disease. Whether BSE and CWD represent interspecies scrapie transfer or are newly arisen prion diseases is unknown. Therefore, the possibility of transmission of prion disease through other food animals cannot be ruled out. There is evidence that vCJD can be transmitted through blood transfusion. There is likely a pool of unknown size of asymptomatic individuals infected with vCJD, ***

*** and there may be asymptomatic individuals infected with the CWD equivalent. 

*** These circumstances represent a potential threat to blood, blood products, and plasma supplies. 


SCRAPIE WS-01: Prion diseases in animals and zoonotic potential 2016

Prion. 10:S15-S21. 2016 ISSN: 1933-6896 printl 1933-690X online




why do we not want to do TSE transmission studies on chimpanzees $ 

5. A positive result from a chimpanzee challenged severly would likely create alarm in some circles even if the result could not be interpreted for man. I have a view that all these agents could be transmitted provided a large enough dose by appropriate routes was given and the animals kept long enough. Until the mechanisms of the species barrier are more clearly understood it might be best to retain that hypothesis. 

snip... 

R. BRADLEY 


SATURDAY, JUNE 24, 2017 

Is there a decline in bovine spongiform encephalopathy cases born after reinforced feed bans? A modelling study in EU member states


MONDAY, JUNE 19, 2017 

PRION 2017 CONFERENCE ABSTRACT P61 vCJD strain properties in a Spanish mother and son replicate as those of a young UK case


THURSDAY, JUNE 22, 2017 

National Prion Disease Pathology Surveillance Center Cases Examined(1) (May 18, 2017)


THURSDAY, JUNE 22, 2017 

PRION 2017 CONFERENCE P120 Early preclinical detection of prions in blood of macaques peripherally infected with the variant CJD agent


WEDNESDAY, JUNE 14, 2017 

Amyloid-β accumulation in human growth hormone related iatrogenic CJD patients in the UK



Terry S. Singeltary Sr.

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