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Investigating the Neuropathology of Obstructive Sleep Apnoea (INcOSA)

8 oktober 2019 uppdaterad av: King's College London

Our multi-disciplinary research group works closely with people who have obstructive sleep apnoea. This is a life-long illness that causes breathing to stop during sleep, which leads to low-oxygen in the blood. Breathing restarts when the airway at the back of the throat reopens, usually during arousal from sleep. In some people the repeated arousals from sleep cause daytime sleepiness. Our research has shown that the low blood oxygen levels affect thinking and feeling, and in some cases we think it damages the brain cells involved with memory, attention, emotions and decision-making.

This study will investigate the relationship between the amount of oxygen in the blood and the loss (if any) of brain cells. Also how the ability to perform complex tasks is affected in patients that suffer from sleep apnoea. The results will show whether the brain damage in patients with sleep apnoea can be reversed with treatment. These findings will guide doctors in the treatment for sleep apnoea and they will cast light onto the process of memory decline with the aim to preserve brain function.

Studieöversikt

Status

Avslutad

Betingelser

Detaljerad beskrivning

This is a cross-sectional physiological study, which is anticipated to last for 4 years. In order to study the mechanism of cognitive dysfunction in Obstructive Sleep Apnoea (OSA), patients will start Continuous Positive Airway Pressure (CPAP) treatment following the confirmed diagnosis of sleep apnoea. CPAP is the treatment of choice for patients with moderate to severe OSA who are sleepy during the day. It is also used in patients with mild OSA if they are excessively sleepy or suffer from cardiovascular risk factors. It is recommended by the National Institute for Clinical Excellence (NICE) as a treatment for adults with moderate or severe OSA (Sleep apnoea - continuous positive airway pressure, NICE 2008). In the proposed study the initiation of CPAP will be within the 18 week period set out in the National Health Service (NHS) Improvement Plan and Standards for Better Health (Standards for Better Health, Department of Health 2004). No patient with a diagnosis of OSA will commence treatment with CPAP later than advised by the NICE guidelines of clinical judgement for the best interest of the patient.

In order to investigate the neuroinflammation process and discrete changes in the brain of patients with OSA, a minimum of 9 patients with mild OSA and 9 patients with severe OSA will be compared to 9 healthy controls following initial sleep (assessment) study. All participants will undergo a dynamic Positron Emission Tomography with Magnetic Resonance Imaging (PET-MR) scan with the Translocator protein (TSPO) tracer [Fluorine-18] N,N-diethyl-2-[4-(2-fluoroethoxy)phenyl]-5,7-dimethylpyrazolo[1,5-a]pyrimidine-3-acetamide (DPA-714) at the time of enrolment to the study. Each participant will also have an MRI scan and cognitive testing.

Studietyp

Observationell

Inskrivning (Faktisk)

27

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studieorter

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

18 år till 70 år (Vuxen, Äldre vuxen)

Tar emot friska volontärer

Ja

Kön som är behöriga för studier

Manlig

Testmetod

Icke-sannolikhetsprov

Studera befolkning

Patient group:

  • Untreated patients with mild Sleep Apnoea - Apnoea-Hypopnoea Index (AHI) >5 events/hour and <10 events/hour with excessive sleepiness (Epworth sleepiness score >9).
  • Untreated patients with severe Sleep Apnoea - AHI >30 events/hour with excessive sleepiness (Epworth sleepiness score >9).

Healthy control group:

  • Male participants
  • No history of sleep disorders
  • AHI≤5/hour
  • No current or previous major neurological or psychiatric disease
  • Not currently undertaking neuropharmacological treatment
  • Non-smoker
  • No history of alcohol or recreational drug abuse, major organ failure
  • Not professional drivers or shift workers.

Beskrivning

INCLUSION CRITERIA:

Participants with OSA:

  • Male patients
  • With untreated OSA either mild (AHI≥5/hour and ≤10/hour)
  • or severe (AHI≥30/hour)
  • With excessive sleepiness (ESS≥9)
  • Aged 18-69 years

Healthy control group:

  • Male participants
  • No history of sleep disorders
  • AHI≤5/hour
  • No current or previous major neurological or psychiatric disease
  • Not currently undertaking neuropharmacological treatment
  • Non-smoker
  • No history of alcohol or recreational drug abuse
  • No major organ failure
  • Not professional drivers or shift workers

EXCLUSION CRITERIA:

  • Having other sleep disorders, neurological or psychiatric disease
  • Undertaking neuropharmacological treatment
  • Has a history of alcohol or recreational drug abuse, major organ failure
  • Professional drivers or shift workers
  • Unable to have MR scan (e.g. too heavy (>200Kg) or have ferromagnetic implants)
  • [18F]DPA-714 affinity too low
  • Inability to comprehend what is proposed
  • Inability to travel to the research sites

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

Kohorter och interventioner

Grupp / Kohort
Mild OSA
Untreated OSA patients. Apnoea-Hypopnoea Index (AHI) >5 events/hour and <10 events/hour with Epworth Sleepiness Score (ESS)>9.
Severe OSA
Untreated OSA patients. AHI >30 events/hour, with excessive sleepiness (ESS >9).
Healthy control
Healthy control. AHI <5 events/hour.

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Levels of neuroinflammation, brain morphology and neurophysiology will be measured via MRI, PET-MRI imaging & EEG.
Tidsram: MRI, PET-MRI & EEG data analyses will begin right after the completion of data collection, and the summary of results will be reported as soon as available, expected before the completion date of the study as per IRAS 01/06/2020.
27 participants, 9 healthy controls, 9 mild patients & 9 severe patients.
MRI, PET-MRI & EEG data analyses will begin right after the completion of data collection, and the summary of results will be reported as soon as available, expected before the completion date of the study as per IRAS 01/06/2020.
Cognitive performance using the CANTAB battery.
Tidsram: Cognitive performance data analyses will be conducted after the completion of data collection, and the summary of results will be reported along the rest of results in the summary that will be published before 01/06/2020.
27 participants, 9 healthy controls, 9 mild patients & 9 severe patients.
Cognitive performance data analyses will be conducted after the completion of data collection, and the summary of results will be reported along the rest of results in the summary that will be published before 01/06/2020.

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Genetic analysis and linkage to clinical and neuroimaging data will be measured using biological samples (blood or saliva) analysed and stored in the BioResource for Mental and Neurological Health.
Tidsram: Genetic analysis and linkage to clinical and neuroimaging data analyses are expected to continue after the end of the primary study and they will be independently reported by the BioResource for Mental and Neurological Health KCL, within 5 years of study
18 patients, 9 mild & 9 severe.
Genetic analysis and linkage to clinical and neuroimaging data analyses are expected to continue after the end of the primary study and they will be independently reported by the BioResource for Mental and Neurological Health KCL, within 5 years of study

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

King's College London

Samarbetspartners

Guy's and St Thomas' NHS Foundation Trust

Utredare

  • Huvudutredare: Ivana Rosenzweig, MD, PhD, King's College London

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Faktisk)

1 november 2017

Primärt slutförande (Faktisk)

9 september 2019

Avslutad studie (Faktisk)

9 september 2019

Studieregistreringsdatum

Först inskickad

17 augusti 2016

Först inskickad som uppfyllde QC-kriterierna

15 november 2016

Första postat (Uppskatta)

18 november 2016

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

10 oktober 2019

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

8 oktober 2019

Senast verifierad

1 oktober 2019

Mer information

Termer relaterade till denna studie

Nyckelord

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • 170912

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