title: The role of estrogen, progesterone and aromatase in human non-small-cell lung cancer.
abstract: Lung cancer is the leading cause of cancer-related deaths in both men and women worldwide. Despite advances in treatment, patients have few effective therapeutic options and survival rates remain low. Emerging evidence suggests that the hormones estrogen and progesterone play a key role in the progression of non-small-cell lung cancer (NSCLC). The aromatase enzyme, which is responsible for a key step in estrogen biosynthesis, elicits higher levels of estrogen in lung tumors as well as in metastases compared with nonmalignant tissues. Thus, aromatase may prove to be a key predictive biomarker for treatment of NSCLC. Epidemiologic and preclinical data show estrogens play a critical role in lung tumor development and progression. Two estrogen receptors, α and β, are expressed in normal and in cancerous lung epithelium, and estrogen promotes gene transcription that stimulates cell proliferation and inhibits cell death. Furthermore, expression of both forms of estrogen receptor, progesterone receptor and aromatase in NSCLC specimens has been correlated with worse clinical outcomes. Combination therapies that include estrogen receptor downregulators and aromatase inhibitors are currently being assessed in Phase I-II clinical trials among patients with advanced NSCLC. Results will help guide future lung cancer management decisions, with a goal of achieving more effective and less toxic treatments for patients.
authors: UCLA Geffen School of Medicine, Department of Medicine, Division of Hematology/Oncology, Factor Building 11-934, 700 Tiverton Avenue, Los Angeles, CA 90095-16781, USA.
authors: Nadiyah
authors: N
authors: Kazmi
authors: Diana C
authors: DC
authors: Márquez-Garbán
authors: Lilia
authors: L
authors: Aivazyan
authors: Nalo
authors: N
authors: Hamilton
authors: Edward B
authors: EB
authors: Garon
authors: Lee
authors: L
authors: Goodglick
authors: Richard J
authors: RJ
authors: Pietras
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