NCT02480725

Brief Summary

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

Trial Health

35
At Risk

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Trial has exceeded expected completion date
Enrollment
50

participants targeted

Target at P25-P50 for all trials

Timeline
Completed

Started Jun 2015

Longer than P75 for all trials

Status
unknown

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Start

First participant enrolled

June 1, 2015

Completed
21 days until next milestone

First Submitted

Initial submission to the registry

June 22, 2015

Completed
2 days until next milestone

First Posted

Study publicly available on registry

June 24, 2015

Completed
9 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

July 1, 2024

Completed
1 year until next milestone

Study Completion

Last participant's last visit for all outcomes

July 1, 2025

Completed
Last Updated

June 24, 2015

Status Verified

June 1, 2015

Enrollment Period

9.1 years

First QC Date

June 22, 2015

Last Update Submit

June 23, 2015

Conditions

Keywords

CJDCSFprionthrombin

Outcome Measures

Primary Outcomes (1)

  • Thrombin activity assay

    10 years

Study Arms (3)

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.

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.

Procedure: collect CSF (Cerebrospinal fluid) sample

CSF samples of non-CJD patient used as control

CSF samples : Thrombin activity will be assayed.

Interventions

collecting CSF samples for thrombin activity assay

non-CJD patients with a type of dementia

Eligibility Criteria

Age35 Years - 90 Years
Sexall
Healthy VolunteersNo
Age GroupsAdult (18-64), Older Adult (65+)
Sampling MethodNon-Probability Sample
Study Population

CJD and non-CJD patients

You may qualify if:

  • Patient undergoing lumbar puncture test as part of the investigation of cognitive decline.

You may not qualify if:

  • Patients on anticoagulation or those who have contraindication for undergoing lumbar puncture.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Related Publications (29)

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    PMID: 1675487BACKGROUND
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    PMID: 8483948BACKGROUND
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    PMID: 8100741BACKGROUND
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    PMID: 8602267BACKGROUND
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    PMID: 11544275BACKGROUND
  • 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.

    PMID: 7902575BACKGROUND
  • 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.

    PMID: 12033920BACKGROUND
  • 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.

    PMID: 15140132BACKGROUND
  • 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.

    PMID: 11100730BACKGROUND
  • 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.

    PMID: 12719777BACKGROUND
  • 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.

    PMID: 11983300BACKGROUND
  • 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.

    PMID: 15519749BACKGROUND
  • 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.

    PMID: 21218340BACKGROUND
  • 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.

    PMID: 24108468BACKGROUND
  • 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.

    PMID: 18199772BACKGROUND
  • 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.

    PMID: 23454608BACKGROUND
  • 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.

    PMID: 23103417BACKGROUND
  • 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.

    PMID: 18299297BACKGROUND
  • 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.

    PMID: 21854391BACKGROUND
  • 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.

    PMID: 11496108BACKGROUND
  • 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.

    PMID: 15605378BACKGROUND
  • 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.

    PMID: 17413661BACKGROUND
  • 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.

    PMID: 24352712BACKGROUND
  • 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.

    PMID: 23900720BACKGROUND
  • 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.

    PMID: 21303352BACKGROUND
  • 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.

    PMID: 21445238BACKGROUND
  • 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.

    PMID: 25134744BACKGROUND

Biospecimen

Retention: SAMPLES WITHOUT DNA

CSF samples

MeSH Terms

Conditions

Creutzfeldt-Jakob SyndromeInsomnia, Fatal Familial

Condition Hierarchy (Ancestors)

Prion DiseasesCentral Nervous System InfectionsInfectionsDementiaBrain DiseasesCentral Nervous System DiseasesNervous System DiseasesNeurocognitive DisordersMental DisordersNeurodegenerative DiseasesSleep Initiation and Maintenance DisordersSleep Disorders, IntrinsicDyssomniasSleep Wake Disorders

Study Officials

  • Oren Cohen, Dr. (MD)

    Cheba Medical Center

    PRINCIPAL INVESTIGATOR

Central Study Contacts

Oren Cohen, Dr. (MD)

CONTACT

Study Design

Study Type
observational
Observational Model
COHORT
Time Perspective
PROSPECTIVE
Sponsor Type
OTHER GOV
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
MD

Study Record Dates

First Submitted

June 22, 2015

First Posted

June 24, 2015

Study Start

June 1, 2015

Primary Completion

July 1, 2024

Study Completion

July 1, 2025

Last Updated

June 24, 2015

Record last verified: 2015-06