= Tanycyte
A <tanycyte> is a specialized <ependymal cell> and <glial cell> of the <hypothalamus>. Its body can line the <third ventricle>, while a long process extends toward underlying tissue. In the <median eminence>, tanycytic endings surround neurosecretory terminals near blood vessels.<Vascular endothelial cells promote acute plasticity in ependymoglial cells of the neuroendocrine brain by Sandrine De Seranno and others>[Introduction and Figure 1; ventricular cell bodies, long processes and vascular end-feet]{ref}
In cultured rat <tanycytes>, signals from <endothelial cells> altered <actin> organization through <nitric oxide>.<Vascular endothelial cells promote acute plasticity in ependymoglial cells of the neuroendocrine brain by Sandrine De Seranno and others>[Abstract and cultured-cell experiments]{ref}
This supplies an illuminating example of structural regulation: a <glial cell> can change the geometry around a <neuron>'s ending without changing the ending's identity. Evidence for one such interaction does not establish identical functions for every <tanycyte> subtype.
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