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Thiamine als aanvullende therapie voor diabetische ketoacidose
Studie Overzicht
Toestand
Conditie
Interventie / Behandeling
Gedetailleerde beschrijving
Thiamine (vitamine B1) is een in water oplosbare vitamine die een sleutelrol speelt in het aërobe glucosemetabolisme. Thiamine is een cofactor van pyruvaatdehydrogenase (PDH), een enzym dat moet worden geactiveerd om in de Krebs-cyclus te komen voor aëroob metabolisme. PDH-activiteit is verminderd in toestanden met thiaminedeficiëntie, wat resulteert in een verschuiving van het pyruvaatmetabolisme naar de anaerobe route. Dit leidt tot verhoogde lactaatproductie en acidose. Thiamineverlies in de urine, met als gevolg thiaminedeficiëntie, is niet ongewoon bij diabetes. De voorlopige studies van de onderzoekers hebben aangetoond dat thiaminedeficiëntie voorkomt bij maar liefst 39% van de patiënten met DKA, en dat thiaminespiegels omgekeerd geassocieerd zijn met lactaat en acidose. De onderzoeker veronderstelt dat de behandeling van DKA-patiënten met intraveneuze thiamine zal leiden tot een snellere verdwijning van acidose en een verbeterd aëroob metabolisme. De secundaire hypothese van de onderzoeker is dat behandeling met thiamine het verblijf op de IC en in het ziekenhuis zal verkorten en zal leiden tot minder gebruik van ziekenhuismiddelen.
In deze gerandomiseerde, dubbelblinde, placebogecontroleerde studie zullen patiënten die in het ziekenhuis zijn opgenomen met DKA en die deelnemen aan de studie, gerandomiseerd worden naar ofwel intraveneuze thiamine (200 mg in 0,9% zoutoplossing) tweemaal daags gedurende twee dagen of een identiek volume van 0,9% zoutoplossing volgens hetzelfde schema. Het primaire resultaat van de onderzoeker is de verandering in bicarbonaat gedurende de 24 uur na opname, met metingen op 0, 6, 12, 18, 24 uur, gebruikmakend van een lineair model met gemengde effecten. Ten tweede zullen patiënten worden gestratificeerd naar Type I en Type II DM. Bovendien zal een vooraf geplande subanalyse van thiaminedeficiënte proefpersonen worden uitgevoerd.
Studietype
Inschrijving (Werkelijk)
Fase
- Fase 2
Contacten en locaties
Studie Locaties
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Massachusetts
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Boston, Massachusetts, Verenigde Staten, 02215
- Beth Israel Deaconess Medical Center
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Deelname Criteria
Geschiktheidscriteria
Leeftijden die in aanmerking komen voor studie
Accepteert gezonde vrijwilligers
Beschrijving
Inclusiecriteria:
- Bicarbonaat ≤15 mEq/L
- Anion gap > 12 mEq/L
- Bloed pH≤ 7,24 (indien al verkregen door klinisch team)
- Urineketonen (kwalitatief) of serumketonen (β-hydroxyboterzuur) > 3 mmol/L
- Inschrijven binnen 6 uur na presentatie
Uitsluitingscriteria:
- Huidige thiamine-suppletie ≥ 6 milligram per dag (d.w.z. meer dan een multivitamine)
- Concurrerende oorzaken van ernstige acidose, waaronder epileptische aanvallen, koolmonoxidevergiftiging, cyanidetoxiciteit, hartstilstand, leverdisfunctie (specifiek gedefinieerd als bekende cirrose)
- Bekende allergie voor thiamine
- Concurrerende indicatie voor toediening van thiamine zoals beoordeeld door het klinische team (bijv. alcoholist)
- Door onderzoek beschermde bevolkingsgroepen (zwangere vrouwen, gevangenen, verstandelijk gehandicapten)
- Patiënt nam eerder deel aan hetzelfde onderzoek
- Codestatus van Niet reanimeren/niet intuberen (DNR/DNI) of Alleen comfortmaatregelen (CMO)
Studie plan
Hoe is de studie opgezet?
Ontwerpdetails
- Primair doel: Behandeling
- Toewijzing: Gerandomiseerd
- Interventioneel model: Parallelle opdracht
- Masker: Verviervoudigen
Wapens en interventies
Deelnemersgroep / Arm |
Interventie / Behandeling |
|---|---|
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Experimenteel: Thiamine
200 mg IV thiamine in 50 ml 0,9% zoutoplossing tweemaal daags gedurende 2 dagen
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Thiamine 200 mg IV elke 12 uur gedurende 2 dagen
Andere namen:
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Placebo-vergelijker: Placebo
100 ml 0,9% zoutoplossing tweemaal daags gedurende twee dagen
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50 ml 0,9% zoutoplossing
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Wat meet het onderzoek?
Primaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Plasma Bicarbonate Levels
Tijdsspanne: 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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Secundaire uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
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Lactate
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 45 days
|
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
Tijdsspanne: 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)
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: 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
Tijdsspanne: At hospital discharge, median of 4 days
|
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
Tijdsspanne: At hospital discharge, median of 4 days
|
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
|
Andere uitkomstmaten
Uitkomstmaat |
Maatregel Beschrijving |
Tijdsspanne |
|---|---|---|
|
C-peptide Levels
Tijdsspanne: 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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Medewerkers en onderzoekers
Onderzoekers
- Hoofdonderzoeker: Michael Donnino, MD, Beth Israel Deaconess Medical Center
Publicaties en nuttige links
Studie record data
Bestudeer belangrijke data
Studie start (Werkelijk)
Primaire voltooiing (Werkelijk)
Studie voltooiing (Werkelijk)
Studieregistratiedata
Eerst ingediend
Eerst ingediend dat voldeed aan de QC-criteria
Eerst geplaatst (Werkelijk)
Updates van studierecords
Laatste update geplaatst (Werkelijk)
Laatste update ingediend die voldeed aan QC-criteria
Laatst geverifieerd
Meer informatie
Termen gerelateerd aan deze studie
Trefwoorden
Aanvullende relevante MeSH-voorwaarden
- Endocriene systeemziekten
- Metabole ziekten
- Suikerziekte
- Diabetes complicaties
- Zuur-base onevenwichtigheid
- Voedings- en stofwisselingsziekten
- Ketose
- Acidose
- Diabetische ketoacidose
- Zwavelverbindingen
- Organische chemicaliën
- Heterocyclische verbindingen, 1-ring
- Heterocyclische verbindingen
- Thiazoles
- Azoles
- Anorganische chemicaliën
- Chloorverbindingen
- Pyrimidines
- Natriumverbindingen
- Chloriden
- Zoutzuur
- Thiamine
- Natriumchloride
Andere studie-ID-nummers
- 2018P000475
- 1R01DK112886-01A1 (Subsidie/contract van de Amerikaanse NIH)
Plan Individuele Deelnemersgegevens (IPD)
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