FIGURE 1

Immunohistochemistry for Ptx1 protein in human non-neoplastic pituitary. A, expression of Ptx1 protein is observed in the nuclei of anterior pituitary cells in a brown color. The immunopositive cells were observed about 60 to 70% of the nuclei in the anterior pituitary cells (original magnification, 500 ×). B-H, double immunohistochemical staining in human non-neoplastic pituitary indicating that Ptx1 immunopositivity (brown) does frequently co-localized in GH (B), ACTH (D), and α-SU (H) immunopositive cells (blue), and does occasionally co-localized in PRL (C), FSHβ (E), LHβ (F), and TSHβ (G) immunopositive cells (blue) (original magnification, 600 ×).