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Cell-specific expression of Epac2 in the subventricular and subgranular zones.
- Source :
-
Molecular Brain . 12/23/2019, Vol. 12 Issue 1, p1-4. 4p. - Publication Year :
- 2019
-
Abstract
- Aim: cAMP signal transduction cascade activation is important in regulating neurogenesis in adult rodents by increasing the proliferation of newborn cells. Although the ventricular-subventricular zone (V-SVZ) and subgranular zone (SGZ) both contain large populations of neural stem/precursor cells; it remains unclear whether an alternative target of cAMP, the exchange protein directly activated by cAMP (Epac2), is involved in adult neurogenesis in the V-SVZ and SGZ. Here, we investigated the cell-specific expression of Epac2 protein in the V-SVZ and SGZ of the adult mouse brain. Methods: Immunohistochemical analyses were performed using antibodies against Epac2, glial fibrillary acidic protein (GFAP), doublecortin (DCX), and beta-catenin, to examine the co-localization of Epac2 protein and neural stem/precursor cells in the V-SVZ and SGZ in three 8-week-old male mice. Results: In the V-SVZ of the lateral ventricle, most GFAP-positive adult neural stem cells (NSC, defined as type B cells) and 75% of DCX-positive migrating neuroblasts (type A cells) expressed Epac2 proteins. Ninety-three percent of beta-catenin-positive ependymal cells (type E cells), which are in direct contact with NSCs and the ventricles, also expressed Epac2 protein. Similarly, in the SGZ of the hippocampus, Epac2-immunopositive signals were shown by 83% of GFAP-positive radial-glia-like NSCs (type 1 cells), 86% of DCX-positive transiently amplifying cells (type 2 and type 3 cells), and 71% of DCX-positive immature neurons. The present data suggest that a PKA-independent cAMP signaling pathway via Epac2 may be party to adult neurogenesis in the V-SVZ and the SGZ. [ABSTRACT FROM AUTHOR]
- Subjects :
- *NEURAL stem cells
*GLIAL fibrillary acidic protein
*NERVE tissue proteins
Subjects
Details
- Language :
- English
- ISSN :
- 17566606
- Volume :
- 12
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Molecular Brain
- Publication Type :
- Academic Journal
- Accession number :
- 140850532
- Full Text :
- https://doi.org/10.1186/s13041-019-0537-1