Analysis of GIPR expression in the injury epicenter. Representative images of GIPR immunostaining in the spinal cord of sham-operated (A) or SCI animals assessed 2 h (B), 6 h (C), 24 h (D), 14 days (E), or 28 days (F) after surgery. The injury epicenter of SCI animals assessed 14 days (E) or 28 days (F) (chronic phase) showed cytoplasmic granular staining in ballooned cells, which are morphologically compatible with degenerated neurons. GIPR, glucose-dependent insulinotropic peptide receptor; SCI, spinal cord injury. (Original magnification 400×.)