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- Registre américain des essais cliniques
- Essai clinique NCT03717896
La thiamine comme thérapie d'appoint pour l'acidocétose diabétique
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
La thiamine (vitamine B1) est une vitamine hydrosoluble qui joue un rôle clé dans le métabolisme aérobie du glucose. La thiamine est un cofacteur de la pyruvate déshydrogénase (PDH), une enzyme qui doit être activée pour entrer dans le cycle de Krebs pour le métabolisme aérobie. L'activité de la PDH est réduite dans les états déficients en thiamine, ce qui entraîne un déplacement du métabolisme du pyruvate vers la voie anaérobie. Cela conduit à une augmentation de la production de lactate et à une acidose. La perte de thiamine dans l'urine, avec une carence en thiamine qui en résulte, n'est pas rare chez les diabétiques. Les études préliminaires des chercheurs ont montré qu'une carence en thiamine survient chez jusqu'à 39 % des patients atteints d'acidocétose diabétique et que les taux de thiamine sont inversement associés au lactate et à l'acidose. L'investigateur émet l'hypothèse que le traitement des patients atteints d'ACD avec de la thiamine intraveineuse conduira à une résolution plus rapide de l'acidose et à une amélioration du métabolisme aérobie. L'hypothèse secondaire de l'investigateur est que le traitement à la thiamine raccourcira les séjours aux soins intensifs et à l'hôpital et conduira à l'utilisation de moins de ressources hospitalières.
Dans cet essai randomisé, en double aveugle et contrôlé par placebo, les patients admis à l'hôpital avec une ACD qui sont inscrits à l'étude seront randomisés pour recevoir soit de la thiamine intraveineuse (200 mg dans une solution saline à 0,9 %) deux fois par jour pendant deux jours, soit un volume identique de 0,9 % de solution saline selon le même schéma. Le critère de jugement principal de l'investigateur est le changement de bicarbonate au cours des 24 heures suivant l'inscription, avec des mesures à 0, 6, 12, 18, 24 heures, à l'aide d'un modèle linéaire à effets mixtes. Deuxièmement, les patients seront stratifiés par type I et type II DM. De plus, une sous-analyse pré-planifiée des sujets déficients en thiamine sera effectuée.
Type d'étude
Inscription (Réel)
Phase
- Phase 2
Contacts et emplacements
Lieux d'étude
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Massachusetts
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Boston, Massachusetts, États-Unis, 02215
- Beth Israel Deaconess Medical Center
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Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
La description
Critère d'intégration:
- Bicarbonate ≤15 mEq/L
- Trou anionique > 12 mEq/L
- pH sanguin ≤ 7,24 (si déjà obtenu par l'équipe clinique)
- Cétones urinaires (qualitatif) ou cétones sériques (acide β-hydroxybutyrique) > 3 mmol/L
- Inscription dans les 6 heures suivant la présentation
Critère d'exclusion:
- Supplémentation actuelle en thiamine ≥ 6 milligrammes par jour (c'est-à-dire plus qu'une multivitamine)
- Causes concurrentes d'acidose sévère, y compris convulsions, intoxication au monoxyde de carbone, toxicité au cyanure, arrêt cardiaque, dysfonctionnement hépatique (spécifiquement défini comme cirrhose connue)
- Allergie connue à la thiamine
- Indication concurrente pour l'administration de thiamine telle que jugée par l'équipe clinique (par exemple, alcoolique)
- Populations protégées par la recherche (femmes enceintes, détenus, handicapés mentaux)
- Patient inscrit précédemment dans la même étude
- Statut du code Ne pas réanimer/Ne pas intuber (DNR/DNI) ou Mesures de confort uniquement (CMO)
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Traitement
- Répartition: Randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Quadruple
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
|---|---|
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Expérimental: Thiamine
200 mg de thiamine IV dans 50 ml de solution saline à 0,9 % deux fois par jour pendant 2 jours
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Thiamine 200 mg IV toutes les 12 heures pendant 2 jours
Autres noms:
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Comparateur placebo: Placebo
100 mL de solution saline à 0,9 % deux fois par jour pendant deux jours
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50 mL de solution saline à 0,9 %
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Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Plasma Bicarbonate Levels
Délai: 6, 12, 18, and 24 hours after enrollment
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Primary outcome of plasma bicarbonate levels over 24 hours (6, 12, 18, 24 hours) following enrollment
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6, 12, 18, and 24 hours after enrollment
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Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Lactate
Délai: 6, 12, 18, and 24 hours after enrollment
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Secondary outcome of lactate over 24 hours (6, 12, 18, 24 hours) following enrollment
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6, 12, 18, and 24 hours after enrollment
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Anion Gap
Délai: 6, 12, 18, and 24 hours after enrollment
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Secondary outcome of anion gap over 24 hours (6, 12, 18, 24 hours) following enrollment
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6, 12, 18, and 24 hours after enrollment
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ICU Length of Stay
Délai: 45 days
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ICU length of stay reflects the number of ICU admission days.
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45 days
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Hospital Length of Stay
Délai: 45 days
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Hospital length of stay reflects how long it takes a diabetic ketoacidosis patient to recover to the point where he/she can be released from the hospital.
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45 days
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Duration of Insulin Therapy
Délai: First 7 days after enrollment
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The duration of insulin therapy is calculated by examining the hospital clinical information systems for all records of IV insulin infusion beginning at the time of enrollment.
The start and the stop time-stamps of medication infusion are used to calculate a duration of infusion.
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First 7 days after enrollment
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SOFA Score (Sequential Organ Failure Assessement Score)
Délai: 24 hours
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The SOFA score is a validated measure of organ dysfunction commonly used in critically ill patients, particularly those with sepsis.
It evaluates the function of six organ systems-respiratory, cardiovascular, neurologic, hepatic, renal, and coagulation-based on routinely collected clinical and laboratory data.
Each organ system is assigned a score from 0 (normal function) to 4 (most severe dysfunction), resulting in a total score ranging from 0 to 24.
Higher SOFA scores indicate greater severity of organ failure and a higher risk of adverse outcomes.
SOFA score in this study uses a modification in which the arterial oxygen saturation/fraction of inspired oxygen (SaO2 /FiO2) ratio is substituted for the partial pressure of arterial oxygen/fraction of inspired oxygen (PaO2 /FiO2 ratio).
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24 hours
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Oxygen Consumption by Circulating Mononuclear Cells
Délai: 24 hours
|
Oxygen consumption rate of circulating peripheral blood mononuclear cells measured using Seahorse.
Basal respiration represents oxygen consumption under baseline conditions.
ATP-linked respiration represents oxygen consumption coupled to ATP production, while proton leak represents oxygen consumption not linked to ATP synthesis.
Maximal respiration represents the maximal capacity of the electron transport chain after uncoupling.
Spare respiratory capacity represents the difference between maximal and basal respiration and indicates the ability to respond to increased energy demand.
Non-mitochondrial respiration represents oxygen consumption independent of mitochondrial activity.
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24 hours
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Pyruvate Dehydrogenase Activity
Délai: 24 hours and 72 hours (or at discharge if hostpial length of stay was less than 72 hours)
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Secondary outcome of change in PDH specific activity over 72 hours or at discharge if patient's hospital length of stay was less than 72 hours.
PDH activity and total PDH protein quantity were measured in isolated peripheral blood mononuclear cells (PBMCs) following selective disruption of the mitochondrial membrane, using a previously validated immunocapture and microplate-based enzymatic assay protocol.
PDH-specific activity was calculated as the ratio of measured PDH enzymatic activity to the natural logarithm of PDH protein quantity (PDH activity / ln[PDH quantity]), providing a normalized metric that reflects the functional efficiency of the enzyme independent of its expression level.
Higher values suggest higher enzymatic efficiency.
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24 hours and 72 hours (or at discharge if hostpial length of stay was less than 72 hours)
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Neurocognitive: Hopkins Verbal Learning Test - Total Recall
Délai: At hospital discharge, median of 4 days
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The Hopkins Verbal Learning Test-Revised (HVLT-R) Total Recall score is a measure of verbal learning and immediate memory.
Participants are read a list of 12 words (from three semantic categories) and asked to recall as many words as possible across three consecutive learning trials.
The Total Recall score is calculated as the sum of correctly recalled words across the three trials, yielding a possible range of 0 to 36, with higher scores indicating better verbal learning and memory performance.
This score reflects both initial acquisition and short-term retention of verbal information and is commonly used to assess cognitive function in clinical research.
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At hospital discharge, median of 4 days
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Neurocognitive: Hopkins Verbal Learning Test - Delayed Recall
Délai: At hospital discharge, median of 4 days
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The Hopkins Verbal Learning Test-Revised (HVLT-R) Delayed Recall score assesses retention of verbal information after a delay.
Following completion of the three learning trials, participants are asked to recall the previously presented word list after a delay period (typically 20-25 minutes) without re-exposure to the words.
The Delayed Recall score is calculated as the number of correctly recalled words, with a possible range of 0 to 12, where higher scores indicate better memory retention.
This measure reflects the ability to consolidate and retrieve learned information over time and is commonly used to evaluate memory function in clinical and research settings.
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At hospital discharge, median of 4 days
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Neurocognitive: Hopkins Verbal Learning Test - Retention
Délai: At hospital discharge, median of 4 days
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The Hopkins Verbal Learning Test-Revised (HVLT-R) Retention (%) score reflects the proportion of learned information that is retained over a delay.
It is calculated as the ratio of the Delayed Recall score to the highest number of words recalled on any of the three immediate recall trials, multiplied by 100, yielding a percentage value.
Scores typically range from 0% to 100%, with higher values indicating better retention of previously learned material.
This measure provides an index of memory retention independent of initial learning performance.
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At hospital discharge, median of 4 days
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Neurocognitive: Hopkins Verbal Learning Test - Recognition Discrimination Index
Délai: At hospital discharge, median of 4 days
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The Hopkins Verbal Learning Test-Revised (HVLT-R) Recognition Discrimination Index assesses recognition memory by evaluating the ability to distinguish previously learned words from novel distractors.
During the recognition phase, participants are presented with a list of target words and distractor words and asked to identify those that were previously learned.
The Recognition Discrimination Index is calculated as the number of true positives (correctly identified target words) minus the number of false positives (incorrectly identified distractor words), yielding a score typically ranging from -12 to 12. Higher scores indicate better recognition accuracy and discrimination ability, reflecting the integrity of memory retrieval processes.
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At hospital discharge, median of 4 days
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Neurocognitive: Brief Visuospatial Memory Test
Délai: At hospital discharge, median of 4 days
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The Brief Visuospatial Memory Test (BVMT) assesses visuospatial learning and memory.
Participants are shown six geometric designs for a brief period and asked to reproduce them from memory across three learning trials.
Performance is scored based on the accuracy and placement of each design, with a total recall score ranging from 0 to 36, where higher scores indicate better visuospatial memory.
A delayed recall trial is administered after a delay to assess retention of visual information.
This measure evaluates the ability to encode, store, and retrieve visuospatial material.
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At hospital discharge, median of 4 days
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Neurocognitive: Trail Making Test - Test Part A
Délai: At hospital discharge, median of 4 days
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The Trail Making Test Part A (TMT-A) assesses visual attention, processing speed, and psychomotor function.
Participants are instructed to connect numbered circles in sequential order as quickly as possible.
The primary outcome is the time to completion, measured in seconds, with lower times indicating better performance.
There is no fixed maximum score, although testing is typically discontinued at a predefined time limit (commonly 300 seconds).
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At hospital discharge, median of 4 days
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Neurocognitive: Trail Making Test - Test Part B
Délai: At hospital discharge, median of 4 days
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The Trail Making Test Part B (TMT-B) assesses executive function, including cognitive flexibility and set-shifting, in addition to processing speed.
Participants are required to alternate between numbers and letters in sequence (e.g., 1-A-2-B) as quickly as possible.
The primary outcome is the time to completion, measured in seconds, with lower times indicating better performance.
As with TMT-A, there is no fixed maximum score, and testing is typically discontinued at a predefined time limit (commonly 300 seconds).
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At hospital discharge, median of 4 days
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Neurocognitive: WAIS-IV Digit Span
Délai: At hospital discharge, median of 4 days
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The Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV) Digit Span subtest assesses attention, working memory, and concentration.
Participants are asked to repeat sequences of numbers in forward order (Digit Span Forward), reverse order (Digit Span Backward), and ascending order (Digit Span Sequencing).
Scores are based on the total number of correctly recalled sequences, with higher scores indicating better attention and working memory capacity.
The total score ranges from 0 to 48.
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At hospital discharge, median of 4 days
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Neurocognitive: Test of Verbal Fluency and Animal Naming
Délai: At hospital discharge, median of 4 days
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The Animal Naming test is a measure of semantic verbal fluency and executive function.
Participants are asked to name as many animals as possible within a fixed time period.
The score is the total number of unique, correct animal names generated, with higher scores indicating better semantic memory retrieval and executive functioning.
Scores range from 0 with no fixed upper limit.
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At hospital discharge, median of 4 days
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Neurocognitive: Test of Premorbid Functioning
Délai: At hospital discharge, median of 4 days
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The Test of Premorbid Functioning (TOPF) estimates an individual's baseline cognitive ability prior to illness or injury.
Participants are asked to read aloud a list of irregularly spelled words, and performance is scored based on correct pronunciation.
Scores are used to estimate premorbid intellectual functioning.
Scores range from 0 to 70, with higher scores indicating higher estimated premorbid functioning.
This measure helps contextualize current cognitive performance relative to expected baseline levels.
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At hospital discharge, median of 4 days
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Autres mesures de résultats
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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C-peptide Levels
Délai: 0, 24 hours, and 72 hours (or at discharge if hospital length of stay was less than 72 hours)
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C-peptide levels measured at time of study drug administration, 24 hours, and at 72 hours (or at discharge if hospital length of stay was less than 72 hours).
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0, 24 hours, and 72 hours (or at discharge if hospital length of stay was less than 72 hours)
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Collaborateurs et enquêteurs
Parrainer
Les enquêteurs
- Chercheur principal: Michael Donnino, MD, Beth Israel Deaconess Medical Center
Publications et liens utiles
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Réel)
Achèvement primaire (Réel)
Achèvement de l'étude (Réel)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Termes MeSH pertinents supplémentaires
- Maladies du système endocrinien
- Maladies métaboliques
- Diabète sucré
- Complications du diabète
- Déséquilibre acido-basique
- Maladies nutritionnelles et métaboliques
- Cétose
- Acidose
- Acidocétose diabétique
- Composés de soufre
- Produits chimiques organiques
- Composés hétérocycliques, 1 anneau
- Composés hétérocycliques
- Thiazoles
- Azoles
- Produits chimiques inorganiques
- Composés de chlore
- Pyrimidines
- Composés de sodium
- Chlorures
- Acide chlorhydrique
- Thiamine
- Chlorure de sodium
Autres numéros d'identification d'étude
- 2018P000475
- 1R01DK112886-01A1 (Subvention/contrat des NIH des États-Unis)
Plan pour les données individuelles des participants (IPD)
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Informations sur les médicaments et les dispositifs, documents d'étude
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