2012年11月28日 訊 /生物谷BIOON/ --兩個腫瘤抑制基因RB和PTEN共同缺失與浸潤性乳腺癌的發展緊密聯繫在一起,據11月28日發表在Journal of the National Cancer Institute雜誌上的一項研究證實。
乳腺導管原位癌是有發展為浸潤性乳腺癌的危險,在這過程中,沒有既定的生物標記物預示疾病進展。
因此,廣大婦女患者均接受手術和放射治療。然而,只有一小部分乳腺導管原位癌患者會發展成浸潤性乳腺癌。
因此,確定哪些患者有疾病惡化風險能更有效地指導治療乳腺導管原位癌。近來,研究人員評估200例乳腺導管原位癌患者手術切除組織中RB和PTEN的表達。
他們分析了乳腺導管原位癌的復發和進展成浸潤性乳腺癌的風險,並在細胞模型中對兩個腫瘤抑制基因進行了功能性研究。
雖然PTEN的損失並非與臨床結果相關聯,但與RB共同損失,PTEN的缺乏會導致乳腺導管原位癌復發,增加發展成浸潤性乳腺癌的風險。
RB和PTEN缺乏的乳腺導管原位癌婦女,可能發展浸潤性乳腺癌的風險增加了5倍以上。細胞研究表明,每個基因在促進異常增殖和侵襲特性中都扮演著獨特的角色。(生物谷:Bioon.com)
Retinoblastoma and Phosphate and Tensin Homolog Tumor Suppressors: Impact on Ductal Carcinoma In Situ Progression
Erik S. Knudsen, Thomas F. Pajak, Maria Qeenan, A. Kathleen McClendon, Benjamin D. Armon, Gordon F. Schwartz, and Agnieszka K. Witkiewicz
The combined loss of two tumor suppressor genes, retinoblastoma (RB) and phosphatase and tensin homolog (PTEN) was shown to be strongly associated with progression of DCIS to invasive breast cancer, according to a study published November 28 in the Journal of the National Cancer Institute.Ductal carcinoma in situ (DCIS) is a breast cancer precursor lesion for which there are no established markers defining risk of progression to invasive breast cancer. As a result, the majority of women are treated uniformly with surgery and radiation therapy potentially with additional hormonal therapy. However, only a subset of DCIS patients are at risk for developing potentially life-threatening invasive breast cancer requiring such treatment. Thus, defining these patients is a high priority for improving patient care by more effectively directing treatment of DCIS.