Impact of Oxytocin on Obstructive Sleep Apnea Induced Changes in Sleep

Phase 2

Completed

Conditions: Sleep Apnea, Obstructive

Interventions: Drug: Oxytocin Intranasal Spray
Drug: Placebo Intranasal Spray

Registration Number: NCT03148899

Lead Sponsor: George Washington University

Brief Summary: In human volunteers intranasal administration of oxytocin significantly increases parasympathetic and decreases sympathetic cardiac control. OSA is a very prevalent disease with high cardiovascular risk factors, yet this disease remains very poorly treated.

This proposal, based on the current literature and new basic science results detailed above on the role of oxytocin in cardiovascular control, will test if oxytocin administration improves adverse cardiovascular events during the recurrent nocturnal apneas in patients with OSA. This project will lay the groundwork and provide preliminary data to obtain NIH funding to test this important hypotheses more thoroughly and in larger clinical trials.

This study will explore if intranasal oxytocin has any positive cardiovascular benefits in patients with sleep apnea.

Detailed Description: Obstructive Sleep Apnea (OSA) is a major, yet poorly understood cardiovascular health risk that occurs in as many as 24% of males and 9% of females within the US population. OSA can participate in both the initiation and progression of several cardiovascular diseases including sudden death, hypertension, arrhythmias, myocardial ischemia and stroke.

Many of the adverse cardiovascular consequences of OSA are thought to be associated with a diminished cardiac vagal activity, as parasympathetic cardiac vagal activity is typically cardio-protective. Intranasal administration of oxytocin has been shown to significantly increase parasympathetic and decrease sympathetic cardiac control. In this research study, the effect oxytocin has on changes in heart rate or other Polysomnography (PSG) measures in a group of patients that have recently been diagnosed with OSA will be examined.

OSA is typically diagnosed through a polysomnography, a comprehensive recording of the biophysiological changes that occur during sleep. The PSG monitors many body functions including brain (EEG), eye movements (EOG), muscle activity or skeletal muscle activation (EMG) and heart rhythm (ECG) during sleep, respiratory airflow, respiratory effort, pulse oximetry etc.

In this research study, subjects who have recently been diagnosed with OSA will undergo two research study PSGs. Before the first study PSG, subjects will be randomized to receive either Oxytocin (40 IU) or placebo, in a blinded manner, prior to beginning the test. The PSG will then continue as usual, and subject data pertaining to the PSG will be gathered. Subjects will then return within 4 weeks for a second research PSG, where one hour before the test they will receive the opposite intervention that they did not received during the first research PSG study. Data measurements will be re-measured and compared between the two PSGs.

Recruitment & Eligibility

Status: COMPLETED

Sex: All

Target Recruitment: 32

Inclusion Criteria

Men or women 18 years old or older of any ethnic background
Subjects that have recently undergone a standard "in the sleep-lab" diagnostic polysomnography (per standard of care medical guidelines), or the "at home" diagnostic test, and have been diagnosed with OSA

Exclusion Criteria

Pregnant or Breastfeeding women
Women of Child Bearing Potential who are not willing to undergo methods to prevent pregnancy
Subjects who are on medications that affect cardiac autonomic function (eg. Beta Blockers)
Active smokers
Subjects who are unable to read or answer questions in the English language

Study & Design

Study Type: INTERVENTIONAL

Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
Visit 2: Crossover Randomization	Oxytocin Intranasal Spray	At visit 2 (PSG 2) subjects will receive the opposite intervention from the one they received at visit 1: either Oxytocin Intranasal Spray (40 IU) or Placebo Intranasal Spray. Subjects will be blinded as to which drug they are receiving.
Visit 1 Randomization	Oxytocin Intranasal Spray	At visit 1 (PSG 1) subjects will receive one of two interventions: either Oxytocin Intranasal Spray (40 IU) or Placebo Intranasal Spray. Subjects will be blinded as to which drug they are receiving.
Visit 1 Randomization	Placebo Intranasal Spray	At visit 1 (PSG 1) subjects will receive one of two interventions: either Oxytocin Intranasal Spray (40 IU) or Placebo Intranasal Spray. Subjects will be blinded as to which drug they are receiving.
Visit 2: Crossover Randomization	Placebo Intranasal Spray	At visit 2 (PSG 2) subjects will receive the opposite intervention from the one they received at visit 1: either Oxytocin Intranasal Spray (40 IU) or Placebo Intranasal Spray. Subjects will be blinded as to which drug they are receiving.

Primary Outcome Measures

Name	Time	Method
Duration of Obstructive Events	Assessed on Visit 1- Day 1, Visit 2- Day 29

Secondary Outcome Measures

Name	Time	Method
Incidence Proportion of Bradycardia	Assessed on Visit 1- Day 1, Visit 2- Day 29	Event-associated bradycardias were identified as a heart rate reduction of 5 bpm or more from the average heart rate during the 5 s preceding an event to the lowest heart rate either during an event or within 5 s immediately after an event. Incidence proportion, or risk, of bradycardia was calculated as follows: the number of events that resulted in bradycardia divided by the total number of events. This analysis was done using custom MATLAB (MathWorks) code to study heart rate and peripheral capillary oxyhemoglobin saturation (SPO2) before and after apnea and hypopnea events.
O2 Minimum	Assessed on Visit 1- Day 1, Visit 2- Day 29
Respiratory Rate	Assessed on Visit 1- Day 1, Visit 2- Day 29