{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T16:08:10Z","timestamp":1753891690430,"version":"3.41.2"},"reference-count":110,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2023,8,1]],"date-time":"2023-08-01T00:00:00Z","timestamp":1690848000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100005191","name":"Craig H. Neilsen Foundation","doi-asserted-by":"publisher","award":["F32MH127772"],"award-info":[{"award-number":["F32MH127772"]}],"id":[{"id":"10.13039\/100005191","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Mol. Neurosci."],"abstract":"<jats:p>Improvements in the speed and cost of expression profiling of neuronal tissues offer an unprecedented opportunity to define ever finer subgroups of neurons for functional studies. In the spinal cord, single cell RNA sequencing studies support decades of work on spinal cord lineage studies, offering a unique opportunity to probe adult function based on developmental lineage. While Cre\/Flp recombinase intersectional strategies remain a powerful tool to manipulate spinal neurons, the field lacks genetic tools and strategies to restrict manipulations to the adult mouse spinal cord at the speed at which new tools develop. This study establishes a new workflow for intersectional mouse-viral strategies to dissect adult spinal function based on developmental lineages in a modular fashion. To restrict manipulations to the spinal cord, we generate a brain-sparing <jats:italic>Hoxb8<jats:sup>FlpO<\/jats:sup><\/jats:italic> mouse line restricting Flp recombinase expression to caudal tissue. Recapitulating endogenous <jats:italic>Hoxb8<\/jats:italic> gene expression, Flp-dependent reporter expression is present in the caudal embryo starting day 9.5. This expression restricts Flp activity in the adult to the caudal brainstem and below. <jats:italic>Hoxb8<jats:sup>FlpO<\/jats:sup><\/jats:italic> heterozygous and homozygous mice do not develop any of the sensory or locomotor phenotypes evident in Hoxb8 heterozygous or mutant animals, suggesting normal developmental function of the Hoxb8 gene and protein in <jats:italic>Hoxb8<jats:sup>FlpO<\/jats:sup><\/jats:italic> mice. Compared to the variability of brain recombination in available caudal Cre and Flp lines, <jats:italic>Hoxb8<jats:sup>FlpO<\/jats:sup><\/jats:italic> activity is not present in the brain above the caudal brainstem, independent of mouse genetic background. Lastly, we combine the <jats:italic>Hoxb8<jats:sup>FlpO<\/jats:sup><\/jats:italic> mouse line with dorsal horn developmental lineage Cre mouse lines to express GFP in developmentally determined dorsal horn populations. Using GFP-dependent Cre recombinase viruses and Cre recombinase-dependent inhibitory chemogenetics, we target developmentally defined lineages in the adult. We show how developmental knock-out versus transient adult silencing of the same ROR\ud835\udec3 lineage neurons affects adult sensorimotor behavior. In summary, this new mouse line and viral approach provides a blueprint to dissect adult somatosensory circuit function using Cre\/Flp genetic tools to target spinal cord interneurons based on genetic lineage.<\/jats:p>","DOI":"10.3389\/fnmol.2023.1176823","type":"journal-article","created":{"date-parts":[[2023,8,1]],"date-time":"2023-08-01T07:20:42Z","timestamp":1690874442000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":2,"title":["A new Hoxb8FlpO mouse line for intersectional approaches to dissect developmentally defined adult sensorimotor circuits"],"prefix":"10.3389","volume":"16","author":[{"given":"Manon","family":"Bohic","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aman","family":"Upadhyay","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jaclyn T.","family":"Eisdorfer","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jessica","family":"Keating","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rhiana C.","family":"Simon","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Brandy A.","family":"Briones","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chloe","family":"Azadegan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hannah D.","family":"Nacht","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Olisemeka","family":"Oputa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alana M.","family":"Martinez","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bridget N.","family":"Bethell","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mark A.","family":"Gradwell","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Peter","family":"Romanienko","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Matt S.","family":"Ramer","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Garret D.","family":"Stuber","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Victoria E.","family":"Abraira","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1965","published-online":{"date-parts":[[2023,8,1]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","first-page":"618","DOI":"10.1016\/j.neuron.2013.07.051","article-title":"The sensory neurons of touch","volume":"79","author":"Abraira","year":"2013","journal-title":"Neuron"},{"key":"ref2","doi-asserted-by":"publisher","first-page":"295","DOI":"10.1016\/j.cell.2016.12.010","article-title":"The cellular and synaptic architecture of the Mechanosensory dorsal horn","volume":"168","author":"Abraira","year":"2017","journal-title":"Cells"},{"key":"ref3","doi-asserted-by":"publisher","first-page":"3760","DOI":"10.1172\/JCI42843","article-title":"Nociceptors: the sensors of the pain pathway","volume":"120","author":"Adrienne","year":"2010","journal-title":"J. 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