Pekarsky Yuri, Garrison Preston N, Palamarchuk Alexey, Zanesi Nicola, Aqeilan Rami I, Huebner Kay, Barnes Larry D, Croce Carlo M
Kimmel Cancer Center, Thomas Jefferson University, 233 South 10th Street, Philadelphia, PA 19107, USA.
Proc Natl Acad Sci U S A. 2004 Mar 16;101(11):3775-9. doi: 10.1073/pnas.0400481101. Epub 2004 Mar 8.
The FHIT gene is a tumor suppressor that is frequently inactivated by genomic alterations at chromosomal region 3p14.2. In the last few years, a considerable amount of data describing inactivation of FHIT in a variety of human malignancies and demonstrating the tumor suppressor potential of Fhit have been reported. Despite the demonstration that FHIT functions as a tumor suppressor, the pathway through which Fhit induces apoptosis and inhibits growth of cancer cells is not known. Our data demonstrate that Fhit is a target of tyrosine phosphorylation by the Src protein kinase. We show that Src phosphorylates Y114 of Fhit in vitro and in vivo, providing insight into a biochemical pathway involved in Fhit signaling.
FHIT基因是一种肿瘤抑制基因,常因染色体区域3p14.2的基因组改变而失活。在过去几年中,已有大量数据报道了FHIT在多种人类恶性肿瘤中的失活情况,并证明了Fhit的肿瘤抑制潜力。尽管已证明FHIT具有肿瘤抑制功能,但Fhit诱导癌细胞凋亡和抑制其生长的途径尚不清楚。我们的数据表明,Fhit是Src蛋白激酶酪氨酸磷酸化的靶点。我们发现,Src在体外和体内均可使Fhit的Y114位点磷酸化,这为Fhit信号传导所涉及的生化途径提供了线索。