NeuralCipher Research overview
The text below is the source article’s original abstract under a verified reuse license. cc by
BackgroundPeople with Parkinson's disease (pwPD) exhibit sleep and blood biomarker alterations. Intermittent normobaric hypoxia (IH) may promote neuroprotection, but acute effects remain unclear. We aimed to investigate the acute and 24-h retention effects of a single session of IH on sleep parameters and blood biomarkers in pwPD.MethodsFifteen pwPD and 15 sex-matched neurologically healthy individuals participated in a randomized, double-blind, crossover study. Participants underwent two 39-min conditions: (i) IH, consisting of four 6-min hypoxic cycles (FiO2 = 0.10) interspersed with three 5-min normoxic periods; and (ii) normoxia protocol with constant oxygen availability (FiO2 = 0.21). Actigraphy-based sleep metrics and biomarkers (BDNF, cortisol, IL-6, iron, leptin, and adiponectin) were assessed at baseline, immediately post-session, and at 24-h after follow-up.ResultsIH reduced SpO2 (5-20%) and increased hypoxic dose of nearly five times versus normoxia, confirming successful simulation. No effects on sleep parameters were observed post-IH versus baseline in either group. In pwPD, total sleep time decreased 24-h after IH versus the immediate post-session measurement (p = 0.013). Regarding biomarkers, only cortisol and leptin levels demonstrated a decrease, IH acutely reduced cortisol and leptin while increasing adiponectin levels in pwPD, with no significant changes in BDNF, IL-6, or iron.ConclusionA single IH session is a safe and effective method for inducing hypoxia and modulating biomarkers in pwPD, without disrupting sleep behavior. These findings support the safety of the protocol and encourage investigation into long-term IH, particularly its potential to induce sustained physiological adaptations and its role in sleep management.
Scientific assessment
Research question
Assess the question within the original study’s scope.
Methods & sample
Check the source article for study design and sample details.
Key findings
An editorially approved findings summary is not yet published for this record.
Limitations
Generalizability, bias and clinical meaning require separate assessment.
Methods, samples and clinical conclusions are not inferred from bibliographic metadata.