Prss56, a novel marker of adult neurogenesis in the mouse brain. - Supplemental Figures 1 to 5- Brain Structure and Function

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1 Prss56, a novel marker of adult neurogenesis in the mouse brain - Supplemental Figures 1 to 5- Brain Structure and Function Alexandre Jourdon 1,2, Aurélie Gresset 1, Nathalie Spassky 1, Patrick Charnay 1, Piotr Topilko 1 and Renata Santos 1 1 Ecole Normale Supérieure, Institut de Biologie de l ENS (IBENS), and Inserm U1024, and CNRS UMR 8197, 46 rue d Ulm, Paris, France; 2 Sorbonne Universités, UPMC Univ Paris 06, IFD, 4 Place Jussieu, Paris cedex 05 Correspondence should be addressed to: Patrick Charnay, Institut de Biologie de l Ecole Normale Supérieure (IBENS), 46 rue d Ulm, Paris, France; charnay@biologie.ens.fr

2 a c hilus hilus GFP b d * * mt GFP GFP GFP Nestin Prss56 Cre/+,Rosa26 /+ e Prss56 Cre/+,Rosa26 /+,hgfap::gfp f e ONL DG GFP g GFP h RMS SVZ GFP GFP Prss56 Cre/+,Rosa26 / Supplemental Figure 1

3 Supplemental Figure 1. Comparison between the Rosa26 and Rosa26 reporters in P14 and adult DG and SVZ. a Coronal section of a Prss56 Cre/+,Rosa26 /+ adult DG showing highly fluorescent mgfp-positive glial cells and weakly fluorescent dendrites and axons from mgfp-positive granule neurons. b High-resolution confocal stack of radial type I NSCs (arrows) from a Prss56 Cre/+,Rosa26 /+ adult DG showing their complex arborization and apical contacts with blood vessels (asterisks). A higher brightness image on the right reveals the weakly fluorescent cell bodies of granule neurons (arrowhead). c Coronal view of a Prss56 Cre/+,Rosa26 /+ adult DG showing -positive granule neurons. d High resolution confocal stack of Prss56 Cre/+,Rosa26 /+,hgfap::gfp mice showing weakly fluorescent (red), GFP- and Nestin-positive, -positive radial type I NSCs (arrows) compared to the highly fluorescent (red) -positive granule neurons (arrowheads). e-h Coronal sections through various structures of Prss56 Cre/+,Rosa26 / P14 animals. e shows a higher magnification of the region indicated by a box in e. Examples of positive, mgfp-negative (empty arrowheads in e, g, h), -positive, mgfp-positive (arrowheads in e -h) or -negative, mgfp-positive (arrow in e ) cells are indicated (the GFP protein was detected by immunohistochemistry). DG, dentate gyrus;, granular layer;, molecular layer; ONL, olfactory nerve layer of the olfactory bulb; RMS, rostral migratory stream;, subgranular zone; SVZ, subventricular zone. Scale bars: 150 µm (a, c), 20 µm (e-h) and 10 µm (b, d).

4 a c d SPZ P7 pdg e SPZ hilus E 17.5 GFP GFAP GFP b f GFAP GFP Tbr2 GFP Nu g GFAP h pdg hilus GFAP GFP GFP Sox2 GFP Nu coronal slice i GFAP GFP parasagittal slice dors. DG j GFAP coronal slice l m dors. DG dors. DG S100 P 90 med. DG k med. DG Nu n vent. DG o vent. DG vent. DG p fimbria GFP APC r cortex s APC Nu cortex cortex P90 E16.5 hipp cortex q CA1 cortical column (N+A+O) CA1 cluster (N+A) Supplemental Figure 2 cortical column (N only)

5 Supplemental Figure 2. Progeny of Prss56-positive cells during development in the DG, hippocampus and cortex. a, b Optical slices through a Prss56 Cre/+,Rosa26 /+ E17.5 prospective DG showing a radially migrating mgfp-positive cell along a GFAP-positive filament (a, open arrowhead), a multipolar GFAP-negative mgfp-positive cell (a, white arrowhead) and a mgfp-positive radial extension positive for GFAP (b, arrow). c-e Coronal confocal stacks (c, d) and optical slice (d) through a Prss56 Cre/+,Rosa26 /+ P7 DG showing numerous mgfp-positive cells in the hilus, and subpial zone (c). Some of these mgfp-expressing cells are positive for Tbr2 in the SPZ (d, arrowheads) or are GFAP-positive radial cells in the (e, arrows). f-h Coronal confocal stack (f) and optical slices (g, h) through a Prss56 Cre/+,Rosa26 /+ P14 DG, showing the presence of mgfp-positive adultlike radial type I NSCs (f), Sox2- (g, arrow) and GFAP-positive (h, arrow) in the and Sox2-positive astrocytes in the (g, arrowhead). i-n Distribution of the different labeled cell types in Prss56 Cre/+,Rosa26 /+ (i-k, m, n) and Prss56 Cre/+,Rosa26 /+ (l) adult posterior hippocampus. Coronal (i, l-n) and parasagittal (j, k) slices, showing that reporterpositive granule neurons (i-k) and type I NSCs (l) are preferentially located in the dorsal DG, whereas reporter-positive (red) S100-positive astrocytes (m, open arrowheads) are more homogeneously distributed in the DG. n Image at the level of the fimbria, showing a cluster of -expressing cells positive for APC, a marker of mature oligodendrocytes (arrows). o Coronal confocal image of the dorsal pallium of an E16.5 Prss56 Cre/+,Rosa26 /+ embryo showing an isolated cortical column of -positive cells presumably derived from a single radial glia (arrow). p-s Examples of radial units observed in the CA fields of the hippocampus (q) and peri-hippocampal areas of the cortex (p, arrow, r, s) of an adult Prss56 Cre/+,Rosa26 /+ animal. The cell-type composition of the radial units was determined on the basis of cell morphology and molecular markers (not shown) and is indicated on the lower right (A, astrocytes; O, oligodendrocytes; N, neurons). dors., med., vent. DG, dorsal, medial and ventral parts of the posterior dentate gyrus;, granular layer; hipp, hippocampus, molecular layer; pdg, presumptive dentate gyrus;, subgranular layer; SPZ, subpial zone. Scale bars: 200 µm (l, p), 150 µm (i, j), 100 µm (s), 70 µm (c, f, o), 30 µm (d, g, q, r) and 15 µm (a, b, e, h, m, n).

6 a P 2 P 8 P 30 P 90 b Antero-posterior axis (distance from bregma) +1,7 mm +1,2 +0,6-0,2-0,7-1,4 LV anterior end of LV striatum septum fimbria wall of the LV posterior end of LV area of Prss56 expression c BrdU 1w D-SVZ d icv 1w 12 w + 12 w 2.1 % LV 12 w BrdU +6 w BrdU + FGF SVZ LV LV LV striatum SVZ BrdU 33.7 % V-SVZ SVZ BrdU Supplemental Figure 3

7 Supplemental Figure 3. Distribution of reporter-positive cells and Prss56 mrna in the OB and SVZ. a Coronal sections of Prss56 Cre/+,Rosa26 /+ OB at different postnatal stages showing the increase in the number of -positive neurons. b Schematic representation of the distribution of Prss56 mrna at different anterior-posterior levels of the lateral ventricle based on in situ hybridization analysis (n=3). Note that Prss56 mrna is not present in the dorsal part of the lateral wall nor in the dorsal and medial walls. c Analysis of long term retention of BrdU in the SVZ. The BrdU incorporation protocol is depicted on the top left. The lateral wall was divided in two parts: (i) the ventral and median SVZ of the lateral wall (V-SVZ) and (ii) the dorsal part of the lateral wall, the extending sub-callosal part of the SVZ and the dorsal wall (D-SVZ). TdTom-positive and -negative BrdU-labeled cells were quantified in the SVZ, in confocal optical slices (n=3 animals), as illustrated in the left image. 97 and 315 BrdU-positive cells were counted in the D-SVZ and V-SVZ, respectively. Percentages of -positive cells are indicated on the right. Note that BrdU-positive cells may correspond to postmitotic cells or quiescent NSCs. e Coronal confocal stacks of the SVZ of Prss56 Cre/+,Rosa26 /+ animals after intracerebroventricular (ICV) administration of BrdU only (left panel) or BrdU and FGF (right panel). The ICV protocol is depicted on the top. LV, lateral ventricle;, granule cell layer of the olfactory bulb; SVZ, subventricular zone. Scale bars: 200 µm (a, except P2, 100 µm) and 20 µm (c, d).

8 Prss56 mrna E13.5 P2 a P 90 b c c pob ONL EPL poe d pon e f ONL pob g ONLe ONLe ONLi ONLi Prss56 Cre R26 Sox10 GFAP BLBP GFAP Sox10 βtub Sox10 d e Sox10 βtub Sox10 Sox10 GFAP BLBP GFAP Sox10 βtub Sox10 Sox10 GFAP BLBP GFAP f Supplemental Figure 4 g

9 Supplemental Figure 4. Prss56 is expressed in a subpopulation of olfactory ensheathing cells in the OB. a-c Detection of Prss56 mrna by in situ hybridization in the prospective and adult OB at the indicated stages. c' shows a higher magnification of the external layer boxed in (c). d-f Confocal images of Prss56 Cre/+,Rosa26 /+ OB showing -positive Sox10-positive GFAP-negative olfactory ensheathing cells at the indicated stages. g Confocal images of Prss56 Cre/+,Rosa26 /+ OB showing -, BLBP-positive cells at P90. d -g Higher magnifications of the regions boxed in (d-g). EPL, external plexiform layer;, granule cell layer;, glomerular layer; ONL, olfactory nerve layer; ionl, inner ONL; oonl, outer ONL; pob, prospective olfactory bulb; poe, prospective olfactory epithelium; pon, prospective olfactory nerve. Scale bars: 200 µm (a-c), 80 µm (d, f, g), 40 µm (e) and 20 µm (d -g ).

10 a b Prss56 mrna P0 P 30 c P 90 d Hypth Hypth GFAP Nestin GFP Nu e i) P 90 iii) ii) DMH iv) v) vi) MM VMH VZ Arc e 4th V th Toward ME -1 mm ppv ppv Arc -1,3 mm -1,7 mm -2,0 mm -2,3 mm e DMH ANH Ro VMH ppv Arc i) ii) 12 w +6 w iv) v) f pvz 1w Post iii) f BrdU+FGF icv Floor Me Ant g BrdU Nestin MM of VZ vi) pvz VZ Nu h i DCX VZ BrdU Sox2 j m GFAP Nu VZ BrdU Nestin BrdU Sox2 Supplemental Figure 5 GFAP Nu -2,5 mm

11 Supplemental Figure 5. Prss56 expression and distribution of reporter-positive cells in the hypothalamus. a-b Coronal hypothalamus slices analyzed by in situ hybridization for the presence of Prss56 mrna at P0 and P30, respectively. c Coronal confocal stack through a Prss56 Cre/+,Rosa26 P14 hypothalamus showing the first -positive cells lining the third ventricle. These cells have the morphology of tanycytes and are localized below the GFAP-positive tanycyte population. d Confocal image of an adult Prss56 Cre/+,Rosa26 /+ hypothalamus, showing the similar morphology of ventricular (arrow) and parenchymal (arrowheads), Nestin-positive, mgfp-positive tanycytes. e Series of anterior-posterior coronal slices of an adult Prss56 Cre/+,Rosa26 /+ hypothalamus, showing the distribution of positive cells. e Schematic representation of the distribution of -positive tanycytes along the ventricular wall as observed in (e). The red area corresponds to the region rich in -positive tanycytes. The blue double arrows indicate the planes of section in (e). f-j Characterization of parenchymal tanycyte-like -positive cells from a Prss56 Cre/+,Rosa26 /+ hypothalamus after BrdU + FGF infusion (a schematic representation of the protocol is shown on the left). f Confocal z-stack showing numerous -positive cells in the ventricular (VZ) and periventricular (pvz) zones. f' Single optical slice from (f) showing the localization of cell bodies of -positive tanycyte-like cells in the pvz (arrows). g, h Confocal images of -positive, BrdU-positive parenchymal tanycyte-like cells expressing Nestin (g, arrow) and Sox2 (h, arrow). i, j Confocal images showing that -positive parenchymal tanycyte-like cell (arrows) do not express DCX (i, arrow) nor GFAP (j, arrow). Arrowheads in (i) indicate DCX-positive cells. Arc, arcuate nucleus; DMH, dorsomedial nucleus; Hypth, hypothalamus; ME, medial eminence; MM, medial mammillary nucleus; ppv, posterior part of the periventricular nucleus; pvz periventricular zone; VMH, ventromedial nucleus; VZ, ventricular zone. Scale bars: 150 µm (b, e), 40 µm (a, c), 20 µm (d, f, f, h), 10 µm (g, i) and 5 µm (j).

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