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<p>4 (PDE4) inhibitors, such as <a href="page.php?w=Rolipram">Rolipram</a>, cause emesis as one of their side effects. It has been found that these PDE4 isoforms are expressed in the CTZ and in the brainstem in general. The <a href="page.php?w=mRNA">mRNA</a> products from genes that code for these PDE4 isoforms are plentiful in the CTZ, and not only located in CTZ <a href="page.php?w=neurons">neurons</a>, but also in <a href="page.php?w=glial_cells">glial cells</a> and blood vessels associated with the CTZ neurons. PDE4 mRNAs are transcribed more</p><p>
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