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- Klinische Studie NCT03717896
Thiamin als Zusatztherapie bei diabetischer Ketoazidose
Studienübersicht
Status
Bedingungen
Intervention / Behandlung
Detaillierte Beschreibung
Thiamin (Vitamin B1) ist ein wasserlösliches Vitamin, das eine Schlüsselrolle im aeroben Glukosestoffwechsel spielt. Thiamin ist ein Cofaktor von Pyruvatdehydrogenase (PDH), einem Enzym, das für den Eintritt in den Krebszyklus für den aeroben Stoffwechsel aktiviert werden muss. Die PDH-Aktivität ist in Thiaminmangelzuständen reduziert, was zu einer Verschiebung des Pyruvatstoffwechsels auf den anaeroben Weg führt. Dies führt zu einer erhöhten Laktatproduktion und Azidose. Ein Thiaminverlust im Urin mit nachfolgendem Thiaminmangel ist bei Diabetes nicht ungewöhnlich. Die vorläufigen Studien der Forscher haben ergeben, dass ein Thiaminmangel bei bis zu 39 % der Patienten mit DKA auftritt und dass der Thiaminspiegel umgekehrt mit Laktat und Azidose assoziiert ist. Der Prüfarzt stellt die Hypothese auf, dass die Behandlung von DKA-Patienten mit intravenösem Thiamin zu einer schnelleren Auflösung der Azidose und einem verbesserten aeroben Stoffwechsel führen wird. Die sekundäre Hypothese des Forschers ist, dass die Thiaminbehandlung die Aufenthalte auf der Intensivstation und im Krankenhaus verkürzen und zu einer geringeren Inanspruchnahme von Krankenhausressourcen führen wird.
In dieser randomisierten, doppelblinden, placebokontrollierten Studie werden Patienten, die mit DKA ins Krankenhaus eingeliefert wurden und in die Studie aufgenommen wurden, entweder intravenös Thiamin (200 mg in 0,9 % Kochsalzlösung) zweimal täglich für zwei Tage oder ein identisches Volumen von intravenös verabreicht 0,9 % Kochsalzlösung nach dem gleichen Zeitplan. Das primäre Ergebnis des Prüfarztes ist die Änderung des Bikarbonats über 24 Stunden nach der Aufnahme, mit Messungen bei 0, 6, 12, 18, 24 Stunden unter Verwendung eines linearen Mixed-Effects-Modells. Zweitens werden die Patienten nach Typ-I- und Typ-II-DM stratifiziert. Zusätzlich wird eine vorgeplante Unteranalyse von Probanden mit Thiaminmangel durchgeführt.
Studientyp
Einschreibung (Tatsächlich)
Phase
- Phase 2
Kontakte und Standorte
Studienorte
-
-
Massachusetts
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Boston, Massachusetts, Vereinigte Staaten, 02215
- Beth Israel Deaconess Medical Center
-
-
Teilnahmekriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Beschreibung
Einschlusskriterien:
- Bikarbonat ≤15 mEq/L
- Anionenlücke > 12 mEq/L
- Blut-pH ≤ 7,24 (falls bereits vom klinischen Team ermittelt)
- Urinketone (qualitativ) oder Serumketone (β-Hydroxybuttersäure) > 3 mmol/L
- Anmeldung innerhalb von 6 Stunden nach Präsentation
Ausschlusskriterien:
- Aktuelle Thiamin-Supplementierung ≥ 6 Milligramm pro Tag (d. h. mehr als ein Multivitamin)
- Konkurrierende Ursachen einer schweren Azidose, einschließlich Krampfanfälle, Kohlenmonoxidvergiftung, Zyanidvergiftung, Herzstillstand, Leberfunktionsstörung (speziell definiert als bekannte Zirrhose)
- Bekannte Allergie gegen Thiamin
- Konkurrierende Indikation für die Verabreichung von Thiamin, wie vom klinischen Team beurteilt (z. B. Alkoholiker)
- Forschungsgeschützte Bevölkerungsgruppen (Schwangere, Gefangene, geistig Behinderte)
- Der Patient war zuvor in dieselbe Studie aufgenommen
- Codestatus „Nicht wiederbeleben/nicht intubieren“ (DNR/DNI) oder „Nur Komfortmaßnahmen“ (CMO)
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Behandlung
- Zuteilung: Zufällig
- Interventionsmodell: Parallele Zuordnung
- Maskierung: Vervierfachen
Waffen und Interventionen
Teilnehmergruppe / Arm |
Intervention / Behandlung |
|---|---|
|
Experimental: Thiamin
200 mg IV Thiamin in 50 ml 0,9 % Kochsalzlösung zweimal täglich für 2 Tage
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Thiamin 200 mg i.v. alle 12 Stunden für 2 Tage
Andere Namen:
|
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Placebo-Komparator: Placebo
100 ml 0,9 % Kochsalzlösung zweimal täglich für zwei Tage
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50 ml 0,9 % Kochsalzlösung
|
Was misst die Studie?
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Plasma Bicarbonate Levels
Zeitfenster: 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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Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Lactate
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 45 days
|
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
Zeitfenster: 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
Zeitfenster: First 7 days after enrollment
|
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)
Zeitfenster: 24 hours
|
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
Zeitfenster: 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
Zeitfenster: 24 hours and 72 hours (or at discharge if hostpial length of stay was less than 72 hours)
|
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
Zeitfenster: At hospital discharge, median of 4 days
|
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
Zeitfenster: At hospital discharge, median of 4 days
|
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
Zeitfenster: At hospital discharge, median of 4 days
|
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
Zeitfenster: At hospital discharge, median of 4 days
|
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
Zeitfenster: At hospital discharge, median of 4 days
|
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
Zeitfenster: At hospital discharge, median of 4 days
|
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
Zeitfenster: At hospital discharge, median of 4 days
|
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
Zeitfenster: At hospital discharge, median of 4 days
|
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
Zeitfenster: 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
Zeitfenster: 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
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Andere Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
C-peptide Levels
Zeitfenster: 0, 24 hours, and 72 hours (or at discharge if hospital length of stay was less than 72 hours)
|
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).
|
0, 24 hours, and 72 hours (or at discharge if hospital length of stay was less than 72 hours)
|
Mitarbeiter und Ermittler
Ermittler
- Hauptermittler: Michael Donnino, MD, Beth Israel Deaconess Medical Center
Publikationen und hilfreiche Links
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Tatsächlich)
Primärer Abschluss (Tatsächlich)
Studienabschluss (Tatsächlich)
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
- Erkrankungen des endokrinen Systems
- Stoffwechselerkrankungen
- Diabetes Mellitus
- Diabetes-Komplikationen
- Säure-Basen-Ungleichgewicht
- Ernährungs- und Stoffwechselerkrankungen
- Ketose
- Azidose
- Diabetische Ketoazidose
- Schwefelverbindungen
- Organische Chemikalien
- Heterocyclische Verbindungen, 1-Ring
- Heterocyclische Verbindungen
- Thiazoles
- Azolen
- Anorganische Chemikalien
- Chlorverbindungen
- Pyrimidine
- Natriumverbindungen
- Chloride
- Salzsäure
- Thiamin
- Natriumchlorid
Andere Studien-ID-Nummern
- 2018P000475
- 1R01DK112886-01A1 (US NIH Stipendium/Vertrag)
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