NCT02480725|Unknown
Loading search results
Sponsor study identifier
observational
50
0 countries
N/A
Study Start
June 2015
Date type not reportedThis date has not been verified as actual or estimated.
Primary Completion
July 2024
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Study Completion
July 2025
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
The study hypothesis is that that the deleterious effect of prions on the brain may be mediated (at least partially) by activation of serine proteases involved in the coagulation system. If this is true, then measurement of the activity of the coagulation system may be a marker of disease onset (in at higher risk individuals such as E200K\* carriers) and for disease progression or activity in affected individuals. In addition, modulation of the coagulation system activity may be a potential tool for therapeutic intervention. \*E200K- E200K mutation (Glu to Lys substitution) in the prion protein gene
Registry-reported information. Elapsed time and enrollment totals alone do not measure study progress or recruitment pace.
July 2025
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Click on a node to explore related trials.
Some registry-reported names shown below are not yet linked in this graph.
Dates and qualifiers reported by the registry. Estimated dates do not confirm that a milestone has occurred.
June 2015
Date type not reportedThis date has not been verified as actual or estimated.
June 22, 2015
Actual (reported)June 24, 2015
Actual (reported)July 2024
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
July 2025
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Thrombin activity assay
10 years
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.
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.
CSF samples : Thrombin activity will be assayed.
collecting CSF samples for thrombin activity assay
Registry-reported names are shown in full. Names without a link have not yet been matched to a Syfrah profile.
CJD and non-CJD patients
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.
CSF samples
Oren Cohen, Dr. (MD)
Cheba Medical Center
First Submitted
June 22, 2015
First Posted
June 24, 2015
Study Start
June 2015
Date type not reportedThis date has not been verified as actual or estimated.
Primary Completion
July 2024
Estimated (date passed)OBSERVE: Biomarkers in Individuals at Risk for Prion Disease
Contact the study team to confirm eligibility.
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.
This estimate has passed. The registry has not confirmed an actual date for this milestone.
Study Completion
July 2025
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Last Updated
June 24, 2015
Record last verified: 2015-06
Download the complete ClinicalTrials.gov record imported by Syfrah, including fields not shown in this page. The registry may contain a newer revision.
Source: ClinicalTrials.gov.
JSON downloads include source attribution and retrieval details alongside the unchanged original record or the separately normalized values.
Source retrieved: