- Heparanase gene and protein expression in ameloblastoma: possible role in local invasion of tumor cells. Nagatsuka, H., Han, P.P., Tsujigiwa, H., Siar, C.H., Gunduz, M., Sugahara, T., Sasaki, A., Nakajima, M., Naomoto, Y., Nagai, N. Oral Oncol. (2005)