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Akino, K. et al.

A novel molecular marker of pituitary tumor transforming gene involves in a rat liver regeneration.

BACKGROUND: Pituitary tumor transforming gene (PTTG), homologous to a mammalian securin, plays a pivotal role in cell transformation, however, its biological function(s) in normal tissues is not fully understood. Because the liver is a regenerative organ, the relevant biological function of PTTG in the liver would be more feasible to understand PTTG. Also, PTTG may be involved in the liver regeneration. MATERIALS AND METHODS: Expressions of rat hepatic PTTG messengerRNA (mRNA) and cellular immunoreactivities during the cell proliferative period of the liver regeneration both in vitro and in vivo were tested. RESULTS: PTTG expression of the rat primary hepatocyte was stimulated by HGF in a dose dependent manner, and was suppressed when hepatocyte proliferation was inhibited by transforming growth factor-beta1. A positive PTTG immunoreactive co-localizing with 5-bromo-2'-deoxyuridine (BrdU) in the hepatocyte nucleus was found and there was a concurrent sister chromatin itself by the immunofluorescent labeling of PTTG with cytokeratin 18 (CK18). DISCUSSION: Since the correlation of PTTG mRNA expression, cell proliferation and immunoreactivity were observed in primary rat cultured hepatocytes, PTTG may be a novel marker of cell proliferation both in vitro and in vivo liver regeneration.[1]

References

A novel molecular marker of pituitary tumor transforming gene involves in a rat liver regeneration. Akino, K., Akita, S., Mizuguchi, T., Takumi, I., Yu, R., Wang, X.Y., Rozga, J., Demetriou, A.A., Melmed, S., Ohtsuru, A., Yamashita, S. J. Surg. Res. (2005) [Pubmed]

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