Catálogo de publicaciones - revistas

<jats:title>Shallow-water diversification</jats:title> <jats:p> Most of what we know about the relationship between diversification and environment in ancient marine environments has come from invertebrates. The influence of habitat on vertebrate diversification thus remains a persistent question. Sallan <jats:italic>et al.</jats:italic> studied fossil vertebrates spanning the mid-Paleozoic, including both jawed and jawless fish (see the Perspective by Pimiento). They found that diversification occurred primarily in nearshore environments, with diversified forms later colonizing deeper marine or freshwater habitats. Furthermore, more robust forms remained in the nearshore, whereas more gracile forms moved to deeper waters. This split is similar to current relationships between form and environment in aquatic habitats. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6413" page="460" related-article-type="in-this-issue" vol="362" xlink:href="10.1126/science.aar3689">460</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6413" page="402" related-article-type="in-this-issue" vol="362" xlink:href="10.1126/science.aau8461">402</jats:related-article> </jats:p>

<jats:title>Heart rate and blood pressure control</jats:title> <jats:p> PIEZO1 and PIEZO2 are two mechanically activated ion channels that are highly expressed in lungs, bladder, and skin. Zeng <jats:italic>et al.</jats:italic> found that both ion channels are expressed in sensory neurons of a ganglion complex that contribute to the baroreflex, a homeostatic mechanism that helps to keep blood pressure stable (see the Perspective by Ehmke). Conditional double knockout of PIEZO1 and PIEZO2 in these neurons abolished the baroreflex and disrupted blood pressure regulation and heart rates in mice. These changes were very similar to those seen in patients with baroreflex failure. In mice, selective activation of PIEZO2-expressing ganglion neurons triggered immediate increases in heart rate and blood pressure. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6413" page="464" related-article-type="in-this-issue" vol="362" xlink:href="10.1126/science.aau6324">464</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6413" page="398" related-article-type="in-this-issue" vol="362" xlink:href="10.1126/science.aav3495">398</jats:related-article> </jats:p>

<jats:p>A weekly roundup of information on newly offered instrumentation, apparatus, and laboratory materials of potential interest to researchers.</jats:p>

<jats:p> This issue of <jats:italic>Science</jats:italic> includes the program of the 2019 AAAS Annual Meeting. The theme of the AAAS Annual Meeting in Washington, DC, 14 to 17 February 2019, is <jats:italic>Science Transcending Boundries</jats:italic> . </jats:p> <jats:p> A <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="http://www.sciencemag.org/cgi/reprint/362/6413/471.pdf">PDF</jats:ext-link> of the program as it appears in this issue is available here; for more information on the meeting (including registration forms and information on accommodations), please visit <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="www.aaas.org/meetings/">www.aaas.org/meetings/</jats:ext-link> . </jats:p>