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- Registro degli studi clinici negli Stati Uniti
- Sperimentazione clinica NCT03717896
Tiamina come terapia aggiuntiva per la chetoacidosi diabetica
Panoramica dello studio
Stato
Condizioni
Intervento / Trattamento
Descrizione dettagliata
La tiamina (vitamina B1) è una vitamina idrosolubile che svolge un ruolo chiave nel metabolismo aerobico del glucosio. La tiamina è un cofattore della piruvato deidrogenasi (PDH), un enzima che deve essere attivato per entrare nel ciclo di Krebs per il metabolismo aerobico. L'attività del PDH è ridotta negli stati carenti di tiamina, determinando uno spostamento del metabolismo del piruvato verso la via anaerobica. Questo porta ad una maggiore produzione di lattato e acidosi. La perdita di tiamina nelle urine, con conseguente carenza di tiamina, non è rara nel diabete. Gli studi preliminari dei ricercatori hanno rilevato che la carenza di tiamina si verifica nel 39% dei pazienti con DKA e che i livelli di tiamina sono inversamente associati al lattato e all'acidosi. Il ricercatore ipotizza che il trattamento dei pazienti affetti da DKA con tiamina per via endovenosa porterà a una risoluzione più rapida dell'acidosi e a un miglioramento del metabolismo aerobico. L'ipotesi secondaria dello sperimentatore è che il trattamento con tiamina ridurrà i soggiorni in terapia intensiva e in ospedale e porterà all'utilizzo di un minor numero di risorse ospedaliere.
In questo studio randomizzato, in doppio cieco, controllato con placebo, i pazienti ricoverati in ospedale con DKA che sono arruolati nello studio saranno randomizzati a ricevere tiamina per via endovenosa (200 mg in soluzione fisiologica allo 0,9%) due volte al giorno per due giorni o un volume identico di soluzione fisiologica allo 0,9% con lo stesso programma. L'esito primario dello sperimentatore è la variazione del bicarbonato nelle 24 ore successive all'arruolamento, con misurazioni a 0, 6, 12, 18, 24 ore, utilizzando un modello lineare a effetti misti. Secondariamente, i pazienti saranno stratificati per DM di tipo I e di tipo II. Inoltre, verrà eseguita una sottoanalisi pre-pianificata dei soggetti con carenza di tiamina.
Tipo di studio
Iscrizione (Effettivo)
Fase
- Fase 2
Contatti e Sedi
Luoghi di studio
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Massachusetts
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Boston, Massachusetts, Stati Uniti, 02215
- Beth Israel Deaconess Medical Center
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Criteri di partecipazione
Criteri di ammissibilità
Età idonea allo studio
Accetta volontari sani
Descrizione
Criterio di inclusione:
- Bicarbonato ≤15 mEq/L
- Gap anionico > 12 mEq/L
- pH del sangue≤ 7,24 (se già ottenuto dal team clinico)
- Chetoni urinari (qualitativi) o chetoni sierici (acido β-idrossibutirrico) > 3 mmol/L
- Iscrizione entro 6 ore dalla presentazione
Criteri di esclusione:
- Attuale integrazione di tiamina ≥ 6 milligrammi al giorno (cioè più di un multivitaminico)
- Cause concorrenti di grave acidosi tra cui convulsioni, avvelenamento da monossido di carbonio, tossicità da cianuro, arresto cardiaco, disfunzione epatica (specificamente definita come cirrosi nota)
- Allergia nota alla tiamina
- Indicazione competitiva per la somministrazione di tiamina secondo il giudizio del team clinico (ad es. alcolica)
- Popolazioni protette dalla ricerca (donne incinte, detenuti, disabili intellettivi)
- Paziente arruolato in precedenza nello stesso studio
- Stato del codice di non rianimare/non intubare (DNR/DNI) o solo misure di comfort (CMO)
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Trattamento
- Assegnazione: Randomizzato
- Modello interventistico: Assegnazione parallela
- Mascheramento: Quadruplicare
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
|---|---|
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Sperimentale: Tiamina
200 mg di tiamina EV in 50 ml di soluzione fisiologica allo 0,9% due volte al giorno per 2 giorni
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Tiamina 200 mg EV ogni 12 ore per 2 giorni
Altri nomi:
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Comparatore placebo: Placebo
100 ml di soluzione fisiologica allo 0,9% due volte al giorno per due giorni
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50 ml di soluzione salina allo 0,9%.
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Plasma Bicarbonate Levels
Lasso di tempo: 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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Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Lactate
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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)
Lasso di tempo: 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
Lasso di tempo: 24 hours
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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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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
Lasso di tempo: 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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Altre misure di risultato
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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C-peptide Levels
Lasso di tempo: 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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Collaboratori e investigatori
Investigatori
- Investigatore principale: Michael Donnino, MD, Beth Israel Deaconess Medical Center
Pubblicazioni e link utili
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Inizio studio (Effettivo)
Completamento primario (Effettivo)
Completamento dello studio (Effettivo)
Date di iscrizione allo studio
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Effettivo)
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Effettivo)
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Termini MeSH pertinenti aggiuntivi
- Malattie del sistema endocrino
- Malattie metaboliche
- Diabete mellito
- Complicanze del diabete
- Squilibrio acido-base
- Malattie nutrizionali e metaboliche
- Chetosi
- Acidosi
- Chetoacidosi diabetica
- Composti di zolfo
- Prodotti chimici organici
- Composti eterociclici, 1-anello
- Composti eterociclici
- Tiazoli
- Azoli
- Prodotti chimici inorganici
- Composti di cloro
- Pirimidine
- Composti di sodio
- Cloruri
- Acido cloridrico
- Tiamina
- Cloruro di sodio
Altri numeri di identificazione dello studio
- 2018P000475
- 1R01DK112886-01A1 (Sovvenzione/contratto NIH degli Stati Uniti)
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