Distribution of thyrotropin-releasing hormone (TRH) immunoreactivity in the brain of the zebrafish (Danio rerio).

摘要: The distribution of thyrotropin-releasing hormone (TRH) in the brain adult zebrafish was studied with immunohistochemical techniques. In telencephalon, abundant TRH-immunoreactive (TRHir) neurons were observed central, ventral, and supra- postcommissural regions ventral telencephalic area. diencephalon, TRHir anterior parvocellular preoptic nucleus, suprachiasmatic lateral hypothalamic rostral parts tuberal nucleus torus lateralis, posterior nucleus. Some also central thalamic habenula. mesencephalon contained cells rostrodorsal tegmentum, Edinger-Westphal semicircularis, lemniscus. Further interpeduncular rhombencephalon, isthmi locus coeruleus, rostrally, vagal lobe motor caudally. forebrain, fibers several regions, including medial caudodorsal dorsal area, commissural tubercle, lobe. thalamus exhibited moderate innervation. mesencephalon, optic tectum received a rich innervation between periventricular gray zone stratum griseum centrale. A conspicuous longitudinal tract traversed tegmentum extended to rhombencephalon. mesencephalic reticular areas richly innervated by fibers. secondary gustatory moderately ventrolateral ventromedial area Cajal's coursed funiculus spinal cord. amacrine retina. wide suggests that TRH plays different roles. These results reveal number differences respect systems reported other teleosts but similar those found during late developmental stages trout (Diaz et al., 2001).