Localization of bone morphogenetic protein-2 in human osteoarthritic cartilage and osteophyte T. Nakase, M.D., Ph.D., T. Miyaji, M.D., T. Tomita, M.D.,

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Presentation transcript:

Localization of bone morphogenetic protein-2 in human osteoarthritic cartilage and osteophyte T. Nakase, M.D., Ph.D., T. Miyaji, M.D., T. Tomita, M.D., Ph.D., M. Kaneko, M.D., Ph.D., K. Kuriyama, M.D., A. Myoui, M.D., Ph.D., K. Sugamoto, M.D., Ph.D., T. Ochi, M.D., Ph.D., H. Yoshikawa, M.D., Ph.D. Osteoarthritis and Cartilage Volume 11, Issue 4, Pages 278-284 (April 2003) DOI: 10.1016/S1063-4584(03)00004-9

Fig. 1 Histological sections of moderately damaged OA (a–e; Mankin grade 3), growing (f, g) and normal articular cartilage (h, i). Safranin-O/fast green staining (a); in situ hybridization (ISH) with antisense (b, c, f, h) and with sense (d) human BMP-2 cRNA probe; and immunohistochemistry (IH) with anti-BMP-2/4 antibody (e, g, i). (U, upper zone; M, middle zone; D, deep zone; growing, growing neonatal cartilage; normal, normal adult cartilage) (a) Safranin-O staining was decreased in the upper layer, but preserved in the middle and deep layers. (b, c) BMP-2 mRNA was detected in individual (arrow) and clustering (arrow head) chondrocytes in the upper and middle layers (b). In contrast, BMP-2 mRNA was not detected in deep zone cells (c). (d) No signals were detected with sense probe (continuous section from a). (e) BMP-2/4 was immunolocalized in chondrocytes in the middle zone (M). In contrast, immunoreactivity was not apparent in deep zone (D) chondrocytes. (f, g) BMP-2 transcripts (f) and positive immunostaining for BMP-2/4 (g) were observed in articular chondrocytes in human neonatal growing articular cartilage (ankle joint). (h, i) BMP-2 transcripts (h) and positive immunostaining for BMP-2/4 (i) were not detected in cells in normal adult articular cartilage (knee joint). Original magnification: ×40 (a, d, f, h); ×100 (b, c, e); and ×200 (g, i). Osteoarthritis and Cartilage 2003 11, 278-284DOI: (10.1016/S1063-4584(03)00004-9)

Fig. 2 Histological sections of severely damaged OA cartilage (Mankin grade 9). Staining of safranin-O/fast green (a, e); in situ hybridization (ISH) with antisense human BMP-2 cRNA probe (b, c, f, g); and immunohistochemistry (IH) with anti-BMP-2/4 antibody (d, h). (U, upper zone; M, middle zone; D, deep zone) (a) Upper zone was essentially lost and staining for safranin-O was lacking in the middle zone. (b) Intense signals for BMP-2 transcripts were detected in both individual (arrow head) and clustering chondrocytes (arrows) in the middle layer in which the territorial matrix was less stained by safranin-O. (c) Higher magnification of arrow area in (b) in the middle zone. BMP-2 mRNA was detected in clustering chondrocytes. (d) Positive immunostaining for BMP-2/4 was detected both in the individual (arrow head) and clustering (arrow) chondrocytes in the middle layer (nearby section to a). (e) Upper zone was essentially lost and positive staining for safranin-O was apparent in the territorial matrix of the deep zone chondrocytes. (f) BMP-2 mRNA was localized in middle layer chondrocytes (arrow head). BMP-2 mRNA was also detected in both individual and clustering chondrocytes in the deep layer (arrow), whose territorial matrix was stained by safranin-O. (g) Higher magnification of arrow area in (f). BMP-2 mRNA was detected the deep layer chondrocytes. (h) BMP-2/4 was also immunolocalized in deep layer chondrocytes. Original magnification: ×40 (a, e); ×100 (b, f); ×200 (d, h); and ×400 (c, g). Osteoarthritis and Cartilage 2003 11, 278-284DOI: (10.1016/S1063-4584(03)00004-9)

Fig. 3 (a) Staining of safranin-O/fast green; in situ hybridization (ISH) (b–d) with antisense and (e) sense human BMP-2 cRNA probes; and (f, g) immunohistochemistry (IH) with anti-BMP-2/4 antibody and (g) normal mouse serum in histological sections of human osteophytic tissue. (a, b) BMP-2 mRNA was detected in fibroblastic mesenchymal cells in the outer fibrous layer (F), in fibrochondrocytes in the middle fibrocartilage layer (FC) and in chondrocytes in the deep chondrocyte layer (DC). In contrast, BMP-2 transcript was absent in cells in the very deep zone [asterisk in (b)] of the deep cartilage layer close to the bone-forming area. BMP-2 signals were present in osteoblasts in the bone-forming layer (BF), but absent in cells in mature bone located at the center [double asterisks in (b); (a, b, e, f) are nearby sections]. (c) Higher magnification of the F and FC layers shown in (b). Intense signals for BMP-2 mRNA were detected in fibroblastic cells (arrow) and fibrochondrocytes (arrow head). (d) Higher magnification of the DC and the BF layers is presented in (b). BMP-2 transcripts were detected in chondrocytes (arrow) and osteoblasts (arrow head). In contrast, no, or faint, signals for BMP-2 mRNA were detected in the very deep zone chondrocytes (asterisk) close to the BF area. (e) No apparent signals were detected in any layer by human BMP-2 sense probe. Positive BMP-2/4 staining was observed in cells in the outer fibrous (F) layer. (f, g) Positive immunostaining for BMP-2/4 was detected in cells in the outer fibrous layer (F) (f), the middle fibrocartilage layer (FC) (f and arrow in g), and in chondrocytes in the deep chondrocytes layer (DC) (g and arrow head in g). (h) Negative control. No immunostaining was observed with mouse normal serum. Original magnification: ×40 (a, b); ×100 (e, f, h); and ×200 (c, d, g). Osteoarthritis and Cartilage 2003 11, 278-284DOI: (10.1016/S1063-4584(03)00004-9)