Effects of Mating and Social Exposure on Cell Proliferation in the Adult Male Prairie Vole (Microtus ochrogaster)
| Autor: | Wendy Portillo, Francisco J. Camacho, A E Castro, Raúl G. Paredes, Larry J. Young, Néstor F. Díaz |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
medicine.medical_specialty
Article Subject Rostral migratory stream Subventricular zone Neurosciences. Biological psychiatry. Neuropsychiatry Subgranular zone 03 medical and health sciences 0302 clinical medicine Neuroblast Internal medicine medicine Microtus 030304 developmental biology 0303 health sciences biology Dentate gyrus biology.organism_classification Pair bond Prairie vole Endocrinology medicine.anatomical_structure Neurology nervous system Neurology (clinical) 030217 neurology & neurosurgery RC321-571 |
| Zdroj: | Neural Plasticity, Vol 2020 (2020) |
| ISSN: | 1687-5443 2090-5904 |
| Popis: | Microtus ochrogaster is a rodent with a monogamous reproductive strategy characterized by strong pair bond formation after 6 h of mating. Here, we determine whether mating-induced pair bonding increases cell proliferation in the subventricular zone (SVZ), rostral migratory stream (RMS), and dentate gyrus (DG) of the hippocampus in male voles. Males were assigned to one of the four groups: (1) control: males were placed alone in a clean cage; (2) social exposure to a female (SE m/f): males that could see, hear, and smell a sexually receptive female but where physical contact was not possible, because the animals were separated by an acrylic screen with small holes; (3) social exposure to a male (SE m/m): same as group 2 but males were exposed to another male without physical contact; and (4) social cohabitation with mating (SCM): males that mated freely with a receptive female for 6 h. This procedure leads to pair bond formation. Groups 2 and 3 were controls for social interaction. Male prairie voles were injected with 5-bromo-2′-deoxyuridine (BrdU) during the behavioral tests and were sacrificed 48 h later. Brains were processed to identify the new cells (BrdU-positive) and neuron precursor cells (neuroblasts). Our principal findings are that in the dorsal region of the SVZ, SCM and SE m/f and m/m increase the percentage of neuron precursor cells. In the anterior region of the RMS, SE m/f decreases the percentage of neuron precursor cells, and in the medial region SE m/f and m/m decrease the number of new cells and neuron precursor cells. In the infrapyramidal blade of the subgranular zone of the DG, SE m/m and SCM increase the number of new neuron precursor cells and SE m/m increases the percentage of these neurons. Our data suggests that social interaction, as well as sexual stimulation, leads to pair bonding in male voles modulating cell proliferation and differentiation to neuronal precursor cells at the SVZ, RMS, and DG. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text