Distribution of growth hormone-responsive cells in the brain of rats and mice
| Autor: | Jackson C. Bittencourt, Marianne O. Klein, Frederick Wasinski, Jose Donato, Martin Metzger |
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| Rok vydání: | 2020 |
| Předmět: |
Male
0301 basic medicine medicine.medical_specialty Hypothalamus Hippocampus Biology Choline O-Acetyltransferase Mice 03 medical and health sciences 0302 clinical medicine Internal medicine STAT5 Transcription Factor medicine Animals Rats Long-Evans Phosphorylation Cholinergic neuron Molecular Biology Brain Mapping Medulla Oblongata Cerebrum General Neuroscience Area postrema Brain Receptors Somatotropin Choline acetyltransferase Acetylcholine Cholinergic Neurons Diagonal band of Broca Rats Mice Inbred C57BL ACETILCOLINA Infusions Intraventricular 030104 developmental biology Dorsal motor nucleus medicine.anatomical_structure Endocrinology Growth Hormone Neurology (clinical) 030217 neurology & neurosurgery Brain Stem Developmental Biology |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | A growth hormone (GH) injection is able to induce the phosphorylated form of the signal transducer and activator of transcription 5 (pSTAT5) in a large number of cells throughout the mouse brain. The present study had the objective to map the distribution of GH-responsive cells in the brain of rats that received an intracerebroventricular injection of GH and compare it to the pattern found in mice. We observed that rats and mice exhibited a similar distribution of GH-induced pSTAT5 in the majority of areas of the telencephalon, hypothalamus and brainstem. However, rats exhibited a higher density of GH-responsive cells than mice in the horizontal limb of the diagonal band of Broca (HDB), supraoptic and suprachiasmatic nuclei, whereas mice displayed more GH-responsive cells than rats in the hippocampus, lateral hypothalamic area and dorsal motor nucleus of the vagus (DMX). Since both HDB and DMX contain acetylcholine-producing neurons, pSTAT5 was co-localized with choline acetyltransferase in GH-injected animals. We found that 50.0 ± 4.5% of cholinergic neurons in the rat HDB coexpressed GH-induced pSTAT5, whereas very few co-localizations were observed in the mouse HDB. In contrast, rats displayed fewer cholinergic neurons responsive to GH in the DMX at the level of the area postrema. In summary, pSTAT5 can be used as a marker of GH-responsive cells in the rat brain. Although rats and mice exhibit a relatively similar distribution of GH-responsive neurons, some species-specific differences exist, as exemplified for the responsiveness to GH in distinct populations of cholinergic neurons. |
| Databáze: | OpenAIRE |
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