PreBötzinger complex neurons drive respiratory modulation of blood pressure and heart rate

Heart rate and blood pressure oscillate in phase with respiratory activity. A component of these oscillations is generated centrally, with respiratory neurons entraining the activity of pre-sympathetic and parasympathetic cardiovascular neurons. Using a combination of optogenetic inhibition and exci...

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Published ineLife Vol. 9
Main Authors Menuet, Clément, Connelly, Angela A, Bassi, Jaspreet K, Melo, Mariana R, Le, Sheng, Kamar, Jessica, Kumar, Natasha N, McDougall, Stuart J, McMullan, Simon, Allen, Andrew M
Format Journal Article
LanguageEnglish
Published England eLife Science Publications, Ltd 15.06.2020
eLife Sciences Publications Ltd
eLife Sciences Publications, Ltd
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Summary:Heart rate and blood pressure oscillate in phase with respiratory activity. A component of these oscillations is generated centrally, with respiratory neurons entraining the activity of pre-sympathetic and parasympathetic cardiovascular neurons. Using a combination of optogenetic inhibition and excitation in vivo and in situ in rats, as well as neuronal tracing, we demonstrate that preBötzinger Complex (preBötC) neurons, which form the kernel for inspiratory rhythm generation, directly modulate cardiovascular activity. Specifically, inhibitory preBötC neurons modulate cardiac parasympathetic neuron activity whilst excitatory preBötC neurons modulate sympathetic vasomotor neuron activity, generating heart rate and blood pressure oscillations in phase with respiration. Our data reveal yet more functions entrained to the activity of the preBötC, with a role in generating cardiorespiratory oscillations. The findings have implications for cardiovascular pathologies, such as hypertension and heart failure, where respiratory entrainment of heart rate is diminished and respiratory entrainment of blood pressure exaggerated.
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ISSN:2050-084X
2050-084X
DOI:10.7554/eLife.57288