- ICH GCP
- Registr klinických studií v USA
- Klinická studie NCT03353792
Using an Artificial Pancreas System in Older Adult Type 1 Diabetes Mellitus Patients (T1DM AP)
Restoring Brain Metabolism and Function in Older Adult T1DM Patients Using an AP System
Přehled studie
Postavení
Podmínky
Intervence / Léčba
Detailní popis
Typ studie
Zápis (Aktuální)
Fáze
- Nelze použít
Kontakty a umístění
Studijní místa
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Connecticut
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New Haven, Connecticut, Spojené státy, 06510
- Yale New Haven Hospital
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Kritéria účasti
Kritéria způsobilosti
Věk způsobilý ke studiu
Přijímá zdravé dobrovolníky
Pohlaví způsobilá ke studiu
Popis
Inclusion Criteria:
- Provide signed and dated informed consent form
- Male or female
- Age 50-75 years (at least 50% over the age of 65)
- T1DM (>20 years duration)
- C-peptide undetectable
- HbA1c of < 8%
- Insulin pump therapy
- History of frequent hypoglycemia with unawareness (defined as 2 or more episodes of severe hypoglycemia within one year requiring assistance) and 2 or more glucose values < 54 mg/dL during the week of Continuous Glucose Monitoring (CGM) (iPRO monitor, Medtronic) prior to enrollment
- BMI <27 kg/m2
- Good general health as evidenced by medical history and blood screening
- Willing to comply with all study procedures and be available for the duration of the study
- Willing to fast for a limited time period on the morning of a clamp study
Exclusion Criteria:
- Significant diabetic complications (untreated proliferative retinopathy, creatinine ≥1.5 mg/dl, urinary albumin levels 300 mg/day, autonomic neuropathy, painful peripheral neuropathy)
- Significant alcohol intake and vegetarian diet since both are known to have an impact on counterregulation and brain metabolism
- Any contraindications for MRI scanning, including presence of metallic implants or claustrophobia.
- Heavy exercise on a regular basis (i.e. marathon runners)
- Known allergic reactions to components of the study product(s)
- Treatment with another investigational drug or other intervention
- Active infection including hepatitis C, hepatitis B, HIV
- Any past or current history of alcohol or substance abuse
- Psychiatric or neurological disorders under active treatment
- Baseline hemoglobin < 10.5 g/dL in females, or < 12.5 g/dL in males. Blood donation within 30 days of the study
- History of coagulopathy or medical condition requiring long-term anticoagulant therapy (low-dose aspirin treatment is allowed)
- Co-existing cardiac, liver, and kidney disease
- Abnormal liver function tests
- Women that are on oral contraceptives, post-menopausal, pregnant (as assessed by pregnancy test that will be performed on female participants at reproductive age), or lactating.
- Any medical condition or medication that, in the opinion of the investigators, will interfere with the safe completion of the study or study outcomes
Studijní plán
Jak je studie koncipována?
Detaily designu
- Primární účel: Léčba
- Přidělení: Randomizované
- Intervenční model: Paralelní přiřazení
- Maskování: Singl
Zbraně a zásahy
Skupina účastníků / Arm |
Intervence / Léčba |
|---|---|
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Aktivní komparátor: CL/AP system
To improved glycemic control and strict avoidance of hypoglycemia via 8-week use of a CL/AP system (closed-loop/artificial pancreas) reverses brain metabolic adaptations in older adult T1DM patients.
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CL/AP system enabled insulin pump/CGM combination
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Komparátor placeba: usual care
Subjects in this control group will continue their usual diabetic care (insulin pump therapy) along with CGM recording.
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usual diabetic care (insulin pump therapy) along with CGM recording
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Co je měření studie?
Primární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
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Brain Alternate Fuel Uptake
Časové okno: Baseline to 8 - 10 weeks
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Change in brain alternate fuel uptake under hypoglycemia was measured by assessing the percent enrichment of Glutamine 4 (Gln4). Change was measured by subtracting follow up from baseline. Astrocytic glutamine C4 enrichment is a measure of brain acetate metabolism (an alternate fuel to glucose). Previous studies have shown that in people who have been exposed to frequent hypoglycemic episodes, glutamine C4 enrichment increases. Therefore, we expected a reduction in Glutamine C4 percent enrichment in the follow up NMR scans in the intervention group who avoided frequent hypoglycemic episodes through the CL/AP system. In addition, there is no specific cut off value used for Glutamine C4 enrichment, rather a change or reduction was expected and noted." |
Baseline to 8 - 10 weeks
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Sekundární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
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Change in Cognitive Function: MOCA
Časové okno: Baseline to 8-10 weeks
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The Montreal Cognitive Assessment (MoCA) was designed as a rapid screening instrument for mild cognitive dysfunction.
It assesses different cognitive domains: attention and concentration, executive functions, memory, language, visuoconstructional skills, conceptual thinking, calculations, and orientation.
Time to administer the MoCA is approximately 10 minutes.
The total possible score is 30 points; a score of 26 or above is considered normal.
Change was calculated by subtracting follow up from baseline.
https://www.parkinsons.va.gov/resources/MoCA-Instructions-English.pdf
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Baseline to 8-10 weeks
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Change in Cognitive Function: Trail Test A
Časové okno: Baseline to 8-10 weeks
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Trail making test (TMT) A is a test of visual attention and task switching.
It provides information about visual search speed, speed of processing and executive function.
Time is measured in seconds.
The typical average time to complete the test is 29 seconds, a "deficient" performance would be >78 seconds; most people are able to complete in 90 seconds.
Change was calculated by subtracting follow up from baseline.
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Baseline to 8-10 weeks
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Change in Cognitive Function: Trail Test B
Časové okno: Baseline to 8-10 weeks
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Trail making test (TMT) B is a test of visual attention and task switching.
It provides information about visual search speed, speed of processing and executive function.
Time will be measured in seconds.
The typical average time to complete the test is 75 seconds, a "deficient" performance would be >273 seconds; most people are able to complete in 180 seconds.
Change was calculated by subtracting follow up from baseline.
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Baseline to 8-10 weeks
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Change in Cognitive Function: Grooved Pegboard Test
Časové okno: Baseline to 8-10 weeks
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The grooved pegboard test is a manipulative dexterity test that assessed psychomotor speed, fine motor control, and rapid-visual motor coordination.
It consists of a small board of holes with randomly positioned slots.
Pegs with a key along one side must be rotated to match the hole before they can be inserted.
The task was completed using the dominant hand.
Time was measured in seconds.
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Baseline to 8-10 weeks
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Spolupracovníci a vyšetřovatelé
Sponzor
Vyšetřovatelé
- Vrchní vyšetřovatel: Raimund Herzog, MD, Yale School of Medicine Department of Endocrinology
Termíny studijních záznamů
Hlavní termíny studia
Začátek studia (Aktuální)
Primární dokončení (Aktuální)
Dokončení studie (Aktuální)
Termíny zápisu do studia
První předloženo
První předloženo, které splnilo kritéria kontroly kvality
První zveřejněno (Aktuální)
Aktualizace studijních záznamů
Poslední zveřejněná aktualizace (Aktuální)
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Naposledy ověřeno
Více informací
Termíny související s touto studií
Další relevantní podmínky MeSH
Další identifikační čísla studie
- 2000020059
- 1R01DK101984-01A1 (Grant/smlouva NIH USA)
- 1DP3DK112227-01 (Grant/smlouva NIH USA)
Informace o lécích a zařízeních, studijní dokumenty
Studuje lékový produkt regulovaný americkým FDA
Studuje produkt zařízení regulovaný americkým úřadem FDA
produkt vyrobený a vyvážený z USA
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