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Recently, the importance of H<jats:sub>2<\/jats:sub>S in respiratory central pattern generation has been recognized, yet the function of H<jats:sub>2<\/jats:sub>S in the medullary respiratory network remains poorly understood. Here, to evaluate the functional roles of H<jats:sub>2<\/jats:sub>S in the medullary respiratory network, the B\u00f6tzinger complex (B\u00f6tC), the pre-B\u00f6tzinger complex (preB\u00f6tC), and the rostral ventral respiratory group (rVRG), we observed the effects of inhibition of H<jats:sub>2<\/jats:sub>S synthesis at each region on the respiratory pattern by using an in situ arterially perfused preparation of decerebrated male rats. After microinjection of an H<jats:sub>2<\/jats:sub>S synthase inhibitor, cystathionine \u03b2-synthase, into the B\u00f6tC or preB\u00f6tC, the amplitude of the inspiratory burst decreased and the respiratory frequency increased according to shorter expiration and inspiration, respectively. These alterations were abolished or attenuated in the presence of a blocker of excitatory synaptic transmission. On the other hand, after microinjection of the H<jats:sub>2<\/jats:sub>S synthase inhibitor into the rVRG, the amplitude of the inspiratory burst was attenuated, and the respiratory frequency decreased, which was the opposite effect to those obtained by blockade of inhibitory synaptic transmission at the rVRG. These results suggest that H<jats:sub>2<\/jats:sub>S synthesized in the B\u00f6tC and preB\u00f6tC functions to limit respiratory frequency by sustaining the respiratory phase and to maintain the power of inspiration. In contrast, H<jats:sub>2<\/jats:sub>S synthesized in the rVRG functions to promote respiratory frequency by modulating the interval of inspiration and to maintain the power of inspiration. The underlying mechanism might facilitate excitatory synaptic transmission and\/or attenuate inhibitory synaptic transmission.<\/jats:p>","DOI":"10.1038\/s41598-023-47280-9","type":"journal-article","created":{"date-parts":[[2023,12,4]],"date-time":"2023-12-04T11:02:12Z","timestamp":1701687732000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Hydrogen sulfide production in the medullary respiratory center modulates the neural circuit for respiratory pattern and rhythm generations"],"prefix":"10.1038","volume":"13","author":[{"given":"Minako","family":"Okazaki","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masayuki","family":"Matsumoto","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tadachika","family":"Koganezawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2023,12,4]]},"reference":[{"key":"47280_CR1","doi-asserted-by":"publisher","first-page":"1066","DOI":"10.1523\/JNEUROSCI.16-03-01066.1996","volume":"16","author":"K Abe","year":"1996","unstructured":"Abe, K. & Kimura, H. 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