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Record W2154128594 · doi:10.13034/cysj-2013-003

Development Of An Aptamer-Based MRI Contrast Agent For Thrombin Detection<sup>1</sup>

2013· article· en· W2154128594 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

venuePublished in a venue whose home country is Canada.
no affNo Canadian affiliation: this work is invisible to an affiliation-only frame.
No Canadian affiliation. An affiliation-only frame, the usual design, would never have seen this work. It is one of the works that make the case for inverting the frame.

Bibliographic record

VenueJournal of Student Science and Technology · 2013
Typearticle
Languageen
FieldBiochemistry, Genetics and Molecular Biology
TopicAdvanced biosensing and bioanalysis techniques
Canadian institutionsnot available
Fundersnot available
KeywordsAptamerThrombinDiethylenetriaminepentaacetic acidMRI contrast agentConjugateFibrinDOTAThrombusChemistryCoagulationMedicinePlateletMolecular biologyRadiologyMagnetic resonance imagingChelationSurgeryBiologyImmunologyInternal medicine

Abstract

fetched live from OpenAlex

Thrombin is an enzyme that converts soluble fibrinogen into insoluble strands of fibrin (which works with platelets to form a blood clot). MR imaging of thrombin could be useful in the imaging of blood clots (thrombus and embolus). An MRI contrast agent can be made more specific for a certain protein by conjugating (joining) it to an aptamer. An aptamer is a synthesized single-stranded DNA, targeted (through a process called SELEX) to a specific protein. The development of a targeted MRI contrast agent could enhance the diagnostic value of the obtained MR images. Through screening two series of contrast agents, DOTA (1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) and DTPA (diethylenetriaminepentaacetic acid), this project hopes to find the best system for measuring thrombin in serum. This use of aptamer technology (and DNA synthesis) appears to be a unique method of targeting thrombin rather than the more invasive angiography and angioscopy procedures. The first phase of this project involved the synthesis of aptamer-DOTA and aptamer-DTPA conjugates. Progress towards the development of these conjugates is presented. Upon successful synthesis of the aptamer conjugates, they could be screened to find the best system for measuring thrombin in serum. La thrombine est une enzyme qui convertit le fibrinogène soluble en brins de fibrine insoluble (ce qui permet aux plaquettes de former un caillot de sang). L’imagerie à résonance magnétique (IRM) de la thrombine pourrait être utile pour l’imagerie de caillots sanguins (thrombus et embolie). Un agent de contraste IRM peut être conçu pour viser plus spécifiquement une certaine protéine par voie de conjugaison (liaison) à un aptamère. Un aptamère est simple brin d’ADN synthétisé, qui cible (par le processus SELEX) une protéine spécifique. L’élaboration d’un agent de contraste IRM ciblée envers une protéine particulière pourrait améliorer la valeur diagnostique des images IRM obtenues. Grâce à un dépistage de deux séries d’agents de contrastes, DOTA (acide 1,4,7,10-tétraazacyclododécane-1,4,7,10-tétraacétique) et DTPA (acide diéthylènetriaminepentaacétique), ce projet vise à trouver la meilleure méthode afin de mesurer la thrombine dans le sérum. L’utilisation de cette technologie avec aptamère (et avec la synthèse de l’ADN) semble être une méthode unique afin de cibler la trombine de manière moins invasive que les procédures d’angiographie ou d’angioscopie. La première phase de ce projet consistait de la synthèse du conjugué de l’aptamère DOTA et de l’aptamère DTPA. Le progrès vers l’élaboration de ces conjugués est présenté dans cet article. Dès la réussite de la synthèse des conjugués d’aptamères, ces derniers pourraient être en mesure d’être évalué afin de trouver la meilleure méthode pour mesurer la thrombine dans le sérum.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.046
Threshold uncertainty score0.304

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0010.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.001
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.011
GPT teacher head0.293
Teacher spread0.282 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it