Matches in SemOpenAlex for { <https://semopenalex.org/work/W4385652014> ?p ?o ?g. }
- W4385652014 abstract "Abstract Plasticity is a fundamental property of the neural system controlling breathing. One key example of respiratory motor plasticity is phrenic long-term facilitation (pLTF), a persistent increase in phrenic nerve activity elicited by acute intermittent hypoxia (AIH). pLTF can arise from distinct cell signaling cascades initiated by serotonin versus adenosine receptor activation, respectively, and interact via powerful cross-talk inhibition. Here, we demonstrate that the daily rest/active phase and the duration of hypoxic episodes within an AIH protocol have profound impact on the magnitude and mechanism of pLTF due to shifts in serotonin/adenosine balance. Using the historical “standard” AIH protocol (3, 5-min moderate hypoxic episodes), we demonstrate that pLTF magnitude is unaffected by exposure in the midactive versus midrest phase, yet the mechanism driving pLTF shifts from serotonin-dominant (midrest) to adenosine-dominant (midactive). This mechanistic “flip” results from combined influences of hypoxia-evoked adenosine release and daily fluctuations in basal spinal adenosine. Since AIH evokes less adenosine with shorter (15, 1-min) hypoxic episodes, midrest pLTF is amplified due to diminished adenosine constraint on serotonin-driven plasticity; in contrast, elevated background adenosine during the midactive phase suppresses serotonin-dominant pLTF. These findings demonstrate the importance of the serotonin/adenosine balance in regulating the amplitude and mechanism of AIH-induced pLTF. Since AIH is emerging as a promising therapeutic modality to restore respiratory and nonrespiratory movements in people with spinal cord injury or ALS, knowledge of how time-of-day and hypoxic episode duration impact the serotonin/adenosine balance and the magnitude and mechanism of pLTF has profound biological, experimental, and translational implications." @default.
- W4385652014 created "2023-08-09" @default.
- W4385652014 creator A5033666229 @default.
- W4385652014 creator A5062813491 @default.
- W4385652014 creator A5064218966 @default.
- W4385652014 creator A5084518388 @default.
- W4385652014 creator A5086018301 @default.
- W4385652014 date "2023-01-01" @default.
- W4385652014 modified "2023-10-17" @default.
- W4385652014 title "Magnitude And Mechanism of Phrenic Long-Term Facilitation Shift Between Daily Rest Vs Active Phase" @default.
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