Y FACS at P3, P7 and P10. *p,0.05, **p,0.005. Scale bars, 20 mm. doi:10.1371/journal.pone.0053109.gCD44 Expression in Developing CerebellumFigure 8. CD44 expression in neuron-lineage cells during postnatal development. A : Double immunostaining of CD44 and calbindin in the cerebellum at P7. D : Double immunostaining of CD44 and NeuN at P7 (D ) and P42 (I ). H: Negative controle. G L: High magnification of F K. Nucleus was counterstained with TO-PRO-3 (blue). J: Quantitative analysis of the number of CD44-positive neuron-lineage cells by FACS at P3, P7 and P10. *p,0.05, **p,0.005. Scale bars, 20 mm. doi:10.1371/journal.pone.0053109.gand restricted to subpopulations of astrocytes and neurons. Finally, CD44 expression was restricted into granule neurons strongly at the adult stage. Interestingly, OPCs expressed CD44 for a very short time, and this expression was shut off during oligodendrocyte maturation. These results strongly indicate that CD44 might inhibit oligodendrocytic differentiation, yet promote differentiation of specific subtypes of neurons and astrocytes. Further functional analysis will be Naringin needed to elucidate the roles of CD44 in celldifferentiation, but the results to date suggest that CD44 may have multiple roles in cerebellar development depending on the developmental stage.Supporting InformationFigure S1 The expression of Sox2/GLAST and NG2/ GLAST in cerebellum at P3. A : Double immunostaining ofCD44 Expression in Developing CerebellumSox2 and GLAST in the cerebellum at P3. D: High magnification of C. E : Double immunostaining of NG2 and GLAST in the cerebellum at P3. H : High magnification of E . Nucleus was counterstained with TO-PRO-3 (blue). Scale bars, 50 mm. (TIF)Figure S2 The expression of CD44 on Bergmann glia atD2: High magnification of A1-D1. A3 3: Further high magnification of 18325633 A2-D2. Scale bars, 50 mm. (TIF)AcknowledgmentsThe authors thank Eriko Fukuda and Kao Abe for excellent technical assistance. We also thank for Animal Experimentation and Biosignal Genome Resource Center at Gunma University Graduate School of Medicine.P7. A : Double immunostaining of CD44 and GLAST in the cerebellum at P3. F : High magnification of A . Asterisk showed the cell body of CD44/GLAST double-positive Bergmann glia. Nucleus was counterstained with TO-PRO-3 (blue). Scale bars, 20 mm. (TIF)Figure S3 BrdU incorporation into CD44-positive cellsAuthor ContributionsConceived and designed the experiments: KS. Performed the experiments: KS SY MN. Analyzed the data: KS SY MN. Contributed reagents/ materials/analysis tools: MK. Wrote the paper: KS MN. Supervised the 94-09-7 price project: YI.during postnatal development. A1-D1: Immmunostaining of CD44 and BrdU at P3 (A1), P7 (B1), P10 (C1) and P14 (D1). A2?
The hippocampus is a functionally complex brain area that plays a role in behaviors as diverse as spatial navigation and emotion. Not surprisingly then, it is also structurally complex and there is mounting evidence that distinct subregions along it’s longitudinal axis are subservient to different behaviors. The dorsal (septal) component has been linked to spatial navigation [1?], whereas the ventral (temporal) portion has been associated with emotional responses to arousing stimuli [4,5]. The hippocampus is also particularly sensitive to stress [6], but it appears that the two subregions respond differentially to stressful experiences. For example, acute stressors decrease long term potentiation (LTP) in the dorsal hippocampus, but selectively increa.Y FACS at P3, P7 and P10. *p,0.05, **p,0.005. Scale bars, 20 mm. doi:10.1371/journal.pone.0053109.gCD44 Expression in Developing CerebellumFigure 8. CD44 expression in neuron-lineage cells during postnatal development. A : Double immunostaining of CD44 and calbindin in the cerebellum at P7. D : Double immunostaining of CD44 and NeuN at P7 (D ) and P42 (I ). H: Negative controle. G L: High magnification of F K. Nucleus was counterstained with TO-PRO-3 (blue). J: Quantitative analysis of the number of CD44-positive neuron-lineage cells by FACS at P3, P7 and P10. *p,0.05, **p,0.005. Scale bars, 20 mm. doi:10.1371/journal.pone.0053109.gand restricted to subpopulations of astrocytes and neurons. Finally, CD44 expression was restricted into granule neurons strongly at the adult stage. Interestingly, OPCs expressed CD44 for a very short time, and this expression was shut off during oligodendrocyte maturation. These results strongly indicate that CD44 might inhibit oligodendrocytic differentiation, yet promote differentiation of specific subtypes of neurons and astrocytes. Further functional analysis will be needed to elucidate the roles of CD44 in celldifferentiation, but the results to date suggest that CD44 may have multiple roles in cerebellar development depending on the developmental stage.Supporting InformationFigure S1 The expression of Sox2/GLAST and NG2/ GLAST in cerebellum at P3. A : Double immunostaining ofCD44 Expression in Developing CerebellumSox2 and GLAST in the cerebellum at P3. D: High magnification of C. E : Double immunostaining of NG2 and GLAST in the cerebellum at P3. H : High magnification of E . Nucleus was counterstained with TO-PRO-3 (blue). Scale bars, 50 mm. (TIF)Figure S2 The expression of CD44 on Bergmann glia atD2: High magnification of A1-D1. A3 3: Further high magnification of 18325633 A2-D2. Scale bars, 50 mm. (TIF)AcknowledgmentsThe authors thank Eriko Fukuda and Kao Abe for excellent technical assistance. We also thank for Animal Experimentation and Biosignal Genome Resource Center at Gunma University Graduate School of Medicine.P7. A : Double immunostaining of CD44 and GLAST in the cerebellum at P3. F : High magnification of A . Asterisk showed the cell body of CD44/GLAST double-positive Bergmann glia. Nucleus was counterstained with TO-PRO-3 (blue). Scale bars, 20 mm. (TIF)Figure S3 BrdU incorporation into CD44-positive cellsAuthor ContributionsConceived and designed the experiments: KS. Performed the experiments: KS SY MN. Analyzed the data: KS SY MN. Contributed reagents/ materials/analysis tools: MK. Wrote the paper: KS MN. Supervised the project: YI.during postnatal development. A1-D1: Immmunostaining of CD44 and BrdU at P3 (A1), P7 (B1), P10 (C1) and P14 (D1). A2?
The hippocampus is a functionally complex brain area that plays a role in behaviors as diverse as spatial navigation and emotion. Not surprisingly then, it is also structurally complex and there is mounting evidence that distinct subregions along it’s longitudinal axis are subservient to different behaviors. The dorsal (septal) component has been linked to spatial navigation [1?], whereas the ventral (temporal) portion has been associated with emotional responses to arousing stimuli [4,5]. The hippocampus is also particularly sensitive to stress [6], but it appears that the two subregions respond differentially to stressful experiences. For example, acute stressors decrease long term potentiation (LTP) in the dorsal hippocampus, but selectively increa.
