The Role of the Coagulation Pathway at the Synapse in Prion Diseases
NCT ID: NCT02480725
Last Updated: 2015-06-24
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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UNKNOWN
50 participants
OBSERVATIONAL
2015-06-30
2025-07-31
Brief Summary
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\*E200K- E200K mutation (Glu to Lys substitution) in the prion protein gene
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Detailed Description
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The study has 2 sections:
1. Prospective part in which we plan to recruit 25 patients with CJD and 25 patients with other types of dementia from Sheba Medical Center (SMC). Prior to inclusion in the study a senior neurologist will interview the patient and will verify that he fully understands the objectives of the study and he is mentally qualified to sign the informed consent form (severely demented patients who will not be able to adequately consider the participation in the study will be excluded).
Cognitive performance will be evaluated using the Mini-mental Status Examination and Frontal Assessment Battery scales.
No clinical data other than the cognitive assessment and those needed for the clinical work up will be especially collected for this study.
2. Retrospective part in which CSF samples from CJD patients and patients with other type of dementia will be shipped to us from our collaborators in Germany ans will be assayed for Thrombin activity. We plan to recruit to this part of the study 100-200 CJD patient CSF samples and a same number of samples from age matched controls.
Thrombin activity (for samples from both parts of the study) will be assayed as follows: CSF sample will be placed in a black 96 well dish (10 per well). Thrombin activity will be measured by a fluorometric assay, quantifying the cleavage of the synthetic peptide substrate Boc-Asp(OBzl)-Pro-Arg-AMC\*\*\* (I-1560, Bachem, Switzerland, 13 molar final concentration). Measurements will be performed by the Infinite 2000 microplate reader (Tecan, infinite 200, Switzerland) with excitation and emission filters of 360±35 and 460±35 nm, respectively. CSF testing for thrombin activity will be conducted in Professor Chapman's laboratory in Sheba. This laboratory is actively engaged in research on the role of thrombin and PAR-1 in diseases of the nervous system and is fully equipped to perform the biochemical and protein levels experiments.
The assay has the potential for commercialization as a diagnostic test for CJD. In addition, there is the potential to develop therapeutic agents targeting excessive thrombin activation.
\*\*SDAT=Senile Dementia of Alzheimer Type
\*\*\*AMC= Amino Methyl Coumarin
Conditions
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Study Design
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COHORT
PROSPECTIVE
Study Groups
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CJD (Creutzfeldt-Jakob disease) patients
Prior to inclusion in the study a senior neurologist will interview the patient and will verify that he fully understands the objectives of the study and he is mentally qualified to sign the informed consent form (severely demented patients who will not be able to adequately consider the participation in the study will be excluded).
Cognitive performance will be evaluated using the Mini-mental Status Examination and Frontal Assessment Battery scales.
No clinical data other than the cognitive assessment and those needed for the clinical work up will be especially collected for this study.
We plan to collect CSF samples for thrombin activity assay.
No interventions assigned to this group
non-CJD patients with a type of dementia
Prior to inclusion in the study a senior neurologist will interview the patient and will verify that he fully understands the objectives of the study and he is mentally qualified to sign the informed consent form (severely demented patients who will not be able to adequately consider the participation in the study will be excluded).
Cognitive performance will be evaluated using the Mini-mental Status Examination and Frontal Assessment Battery scales.
No clinical data other than the cognitive assessment and those needed for the clinical work up will be especially collected for this study.
We plan to collect CSF samples for thrombin activity assay.
collect CSF (Cerebrospinal fluid) sample
collecting CSF samples for thrombin activity assay
CSF samples of non-CJD patient used as control
CSF samples : Thrombin activity will be assayed.
No interventions assigned to this group
Interventions
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collect CSF (Cerebrospinal fluid) sample
collecting CSF samples for thrombin activity assay
Eligibility Criteria
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Inclusion Criteria
Exclusion Criteria
35 Years
90 Years
ALL
No
Sponsors
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Prof. Zerr , Prion Referral Center , University of Gottingen, Germany
UNKNOWN
Sheba Medical Center
OTHER_GOV
Responsible Party
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Dr. Oren Cohen
MD
Principal Investigators
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Oren Cohen, Dr. (MD)
Role: PRINCIPAL_INVESTIGATOR
Cheba Medical Center
Central Contacts
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References
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Prusiner SB. Molecular biology of prion diseases. Science. 1991 Jun 14;252(5012):1515-22. doi: 10.1126/science.1675487.
Harris DA, Lele P, Snider WD. Localization of the mRNA for a chicken prion protein by in situ hybridization. Proc Natl Acad Sci U S A. 1993 May 1;90(9):4309-13. doi: 10.1073/pnas.90.9.4309.
Windl O, Dempster M, Estibeiro P, Lathe R. A candidate marsupial PrP gene reveals two domains conserved in mammalian PrP proteins. Gene. 1995 Jul 4;159(2):181-6. doi: 10.1016/0378-1119(95)00064-d.
Bueler H, Aguzzi A, Sailer A, Greiner RA, Autenried P, Aguet M, Weissmann C. Mice devoid of PrP are resistant to scrapie. Cell. 1993 Jul 2;73(7):1339-47. doi: 10.1016/0092-8674(93)90360-3.
Collinge J, Whittington MA, Sidle KC, Smith CJ, Palmer MS, Clarke AR, Jefferys JG. Prion protein is necessary for normal synaptic function. Nature. 1994 Jul 28;370(6487):295-7. doi: 10.1038/370295a0.
Tobler I, Gaus SE, Deboer T, Achermann P, Fischer M, Rulicke T, Moser M, Oesch B, McBride PA, Manson JC. Altered circadian activity rhythms and sleep in mice devoid of prion protein. Nature. 1996 Apr 18;380(6575):639-42. doi: 10.1038/380639a0.
Aucouturier P, Geissmann F, Damotte D, Saborio GP, Meeker HC, Kascsak R, Kascsak R, Carp RI, Wisniewski T. Infected splenic dendritic cells are sufficient for prion transmission to the CNS in mouse scrapie. J Clin Invest. 2001 Sep;108(5):703-8. doi: 10.1172/JCI13155.
Pan KM, Baldwin M, Nguyen J, Gasset M, Serban A, Groth D, Mehlhorn I, Huang Z, Fletterick RJ, Cohen FE, et al. 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. doi: 10.1073/pnas.90.23.10962.
Ellis V, Daniels M, Misra R, Brown DR. Plasminogen activation is stimulated by prion protein and regulated in a copper-dependent manner. Biochemistry. 2002 Jun 4;41(22):6891-6. doi: 10.1021/bi025676g.
Epple G, Schleuning WD, Kettelgerdes G, Kottgen E, Gessner R, Praus M. Prion protein stimulates tissue-type plasminogen activator-mediated plasmin generation via a lysine-binding site on kringle 2. J Thromb Haemost. 2004 Jun;2(6):962-8. doi: 10.1111/j.1538-7836.2004.00675.x.
Fischer MB, Roeckl C, Parizek P, Schwarz HP, Aguzzi A. Binding of disease-associated prion protein to plasminogen. Nature. 2000 Nov 23;408(6811):479-83. doi: 10.1038/35044100.
Praus M, Kettelgerdes G, Baier M, Holzhutter HG, Jungblut PR, Maissen M, Epple G, Schleuning WD, Kottgen E, Aguzzi A, Gessner R. Stimulation of plasminogen activation by recombinant cellular prion protein is conserved in the NH2-terminal fragment PrP23-110. Thromb Haemost. 2003 May;89(5):812-9.
Deininger MH, Trautmann K, Magdolen V, Luther T, Schluesener HJ, Meyermann R. Cortical neurons of Creutzfeldt-Jakob disease patients express the urokinase-type plasminogen activator receptor. Neurosci Lett. 2002 May 10;324(1):80-2. doi: 10.1016/s0304-3940(02)00168-4.
Zerr I, Bodemer M, Kaboth U, Kretzschmar H, Oellerich M, Armstrong VW. Plasminogen activities and concentrations in patients with sporadic Creutzfeldt-Jakob disease. Neurosci Lett. 2004 Nov 23;371(2-3):163-6. doi: 10.1016/j.neulet.2004.08.063.
Almeida LM, Basu U, Khaniya B, Taniguchi M, Williams JL, Moore SS, Guan LL. Gene expression in the medulla following oral infection of cattle with bovine spongiform encephalopathy. J Toxicol Environ Health A. 2011;74(2-4):110-26. doi: 10.1080/15287394.2011.529061.
Chapman J. Coagulation in inflammatory diseases of the central nervous system. Semin Thromb Hemost. 2013 Nov;39(8):876-80. doi: 10.1055/s-0033-1357482. Epub 2013 Oct 9.
Maggio N, Shavit E, Chapman J, Segal M. Thrombin induces long-term potentiation of reactivity to afferent stimulation and facilitates epileptic seizures in rat hippocampal slices: toward understanding the functional consequences of cerebrovascular insults. J Neurosci. 2008 Jan 16;28(3):732-6. doi: 10.1523/JNEUROSCI.3665-07.2008.
Maggio N, Itsekson Z, Dominissini D, Blatt I, Amariglio N, Rechavi G, Tanne D, Chapman J. Thrombin regulation of synaptic plasticity: implications for physiology and pathology. Exp Neurol. 2013 Sep;247:595-604. doi: 10.1016/j.expneurol.2013.02.011. Epub 2013 Feb 27.
Maggio N, Cavaliere C, Papa M, Blatt I, Chapman J, Segal M. Thrombin regulation of synaptic transmission: implications for seizure onset. Neurobiol Dis. 2013 Feb;50:171-8. doi: 10.1016/j.nbd.2012.10.017. Epub 2012 Oct 25.
Shavit E, Beilin O, Korczyn AD, Sylantiev C, Aronovich R, Drory VE, Gurwitz D, Horresh I, Bar-Shavit R, Peles E, Chapman J. Thrombin receptor PAR-1 on myelin at the node of Ranvier: a new anatomy and physiology of conduction block. Brain. 2008 Apr;131(Pt 4):1113-22. doi: 10.1093/brain/awn005. Epub 2008 Feb 25.
Shavit E, Michaelson DM, Chapman J. Anatomical localization of protease-activated receptor-1 and protease-mediated neuroglial crosstalk on peri-synaptic astrocytic endfeet. J Neurochem. 2011 Nov;119(3):460-73. doi: 10.1111/j.1471-4159.2011.07436.x. Epub 2011 Sep 23.
Beilin O, Gurwitz D, Korczyn AD, Chapman J. Quantitative measurements of mouse brain thrombin-like and thrombin inhibition activities. Neuroreport. 2001 Aug 8;12(11):2347-51. doi: 10.1097/00001756-200108080-00013.
Beilin O, Karussis DM, Korczyn AD, Gurwitz D, Aronovich R, Hantai D, Grigoriadis N, Mizrachi-Kol R, Chapman J. Increased thrombin inhibition in experimental autoimmune encephalomyelitis. J Neurosci Res. 2005 Feb 1;79(3):351-9. doi: 10.1002/jnr.20270.
Beilin O, Karussis DM, Korczyn AD, Gurwitz D, Aronovich R, Mizrachi-Kol R, Chapman J. Increased KPI containing amyloid precursor protein in experimental autoimmune encephalomyelitis brains. Neuroreport. 2007 Apr 16;18(6):581-4. doi: 10.1097/WNR.0b013e328091c1e6.
Itzekson Z, Maggio N, Milman A, Shavit E, Pick CG, Chapman J. Reversal of trauma-induced amnesia in mice by a thrombin receptor antagonist. J Mol Neurosci. 2014 May;53(1):87-95. doi: 10.1007/s12031-013-0200-8. Epub 2013 Dec 19.
Bushi D, Chapman J, Katzav A, Shavit-Stein E, Molshatzki N, Maggio N, Tanne D. Quantitative detection of thrombin activity in an ischemic stroke model. J Mol Neurosci. 2013 Nov;51(3):844-50. doi: 10.1007/s12031-013-0072-y. Epub 2013 Jul 31.
Cohen OS, Prohovnik I, Korczyn AD, Ephraty L, Nitsan Z, Tsabari R, Appel S, Rosenmann H, Kahana E, Chapman J. The Creutzfeldt-Jakob disease (CJD) neurological status scale: a new tool for evaluation of disease severity and progression. Acta Neurol Scand. 2011 Dec;124(6):368-74. doi: 10.1111/j.1600-0404.2011.01489.x. Epub 2011 Feb 8.
Padilla D, Beringue V, Espinosa JC, Andreoletti O, Jaumain E, Reine F, Herzog L, Gutierrez-Adan A, Pintado B, Laude H, Torres JM. Sheep and goat BSE propagate more efficiently than cattle BSE in human PrP transgenic mice. PLoS Pathog. 2011 Mar;7(3):e1001319. doi: 10.1371/journal.ppat.1001319. Epub 2011 Mar 17.
Llorens F, Zafar S, Ansoleaga B, Shafiq M, Blanco R, Carmona M, Grau-Rivera O, Nos C, Gelpi E, Del Rio JA, Zerr I, Ferrer I. Subtype and regional regulation of prion biomarkers in sporadic Creutzfeldt-Jakob disease. Neuropathol Appl Neurobiol. 2015 Aug;41(5):631-45. doi: 10.1111/nan.12175. Epub 2015 Apr 30.
Other Identifiers
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1702-14 SMC
Identifier Type: -
Identifier Source: org_study_id
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