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. 2014 Feb 20;9(2):e89377. doi: 10.1371/journal.pone.0089377

Figure 4. New IHCs cannot downregulate α9AChR and calbindin at older ages.

Figure 4

(A–D) Double staining of Atoh1-HA and EGFP in control (A, C) and PLP/CreERT+; Atoh1-HA+; α9AChR-EGFP+ (B, D) mice at P22 (A, B) and P90 (C, D). (E–H) Colabeling of Atoh1-HA and calbindin in control (E, G) and PLP/CreERT+; Atoh1-HA+ (F, H) mice at P22 (E, F) and P90 (G, H). Arrows in (B), (D), (F), and (H) represent new IHCs. The inset in (B), (D), (F), and (H) shows a single-channel signal for Atoh1-HA. Arrow heads in (A–H) represent endogenous IHCs. OHCs: outer hair cells; IHC: inner hair cell. Scale bar: 20 µm.