Aromatase inhibitors have been introduced as a new treatment modality that could challenge clomiphene citrate as an ovulation induction regiment in patients with PCOS. Although several randomized trials have been conducted regarding their use as ovulation induction agents, only few trials are available regarding their efficacy in IVF stimulated cycles. Current available evidence support that le...

The majority of breast cancers are estrogen receptor positive (ER+). Blockade of estrogen biosynthesis by aromatase inhibitors (AIs) is the first-line endocrine therapy for post-menopausal women with ER+ breast cancers. However, AI resistance remains a major challenge. We have demonstrated previously that increased GDNF/RET signaling in ER+ breast cancers promotes AI resistance. Here we investi...

Aromatase is a critical enzyme in the irreversible conversion of androgens to oestrogens, with inhibition used clinically in hormone-dependent malignancies. We tested the hypothesis that targeted aromatase inhibition in an aggressive brain cancer called glioblastoma (GBM) may represent a new treatment strategy. In this study, aromatase inhibition was achieved using third generation inhibitor, L...

Thirteen postmenopausal women with advanced breast cancer were enrolled in an open randomized Phase I trial of a new p.o. active aromatase inhibitor, CGS 20267 (letrozole). The primary aim of the trial was to assess the impact of two doses of letrozole (0.5 and 2. 5 mg/day) on the peripheral aromatization of androstenedione to estrone. An in vivo isotopic technique was used to measure periphera...

INTRODUCTION Tamoxifen may occasionally precipitate serious and potentially life-threatening hypercalcemia. However, to date, this has not been documented with aromatase inhibitors. CASE PRESENTATION A 65-year-old Japanese woman with liver metastasis from breast cancer was admitted to our hospital with vomiting, anorexia, fatigue, arthralgia, muscle pain and dehydration. She had started a cou...

Abstract: Aim: Hormone responsive breast cancer is the most prevalent worldwide. Letrozole a third-generation aromatase inhibitor widely used for treatment of advanced cancer. The primary objective present work to develop and optimize an injectable solid lipid nanoparticle incorporating letrozole circumvent side-effects marketed conventional formulation thereby improve patient compliance. Mater...

orally active aromatase inhibitors (ais) have gained attention for treatment of infertile women with endometriosis in whom aromatase p450 is aberrantly expressed. this review aimed to critically appraise and summarize the available evidence concerning the use of ais for management of endometriosis-associated infertility. pubmed was searched to may 2015 with the following key words: endometriosi...

The objective of this study was to contribute to investigate the efficacy of letrozole, a potent non-steroidal aromatase inhibitor, on serum sex steroid levels and oocyte growth in rainbow trout females. Serum steroid levels were measured using an indirect enzyme-linked immunosorbent assay (ELISA) before and 22 days after an initial injection with 1, 2.5 mg kg-1 and subsequent weekly injection ...