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https://www.readbyqxmd.com/read/27895740/letrozole-as-second-line-hormonal-treatment-for-recurrent-low-grade-endometrial-stromal-sarcoma-a-case-report-and-review-of-the-literature
#1
Kohei Nakamura, Kentaro Nakayama, Masako Ishikawa, Noriyoshi Ishikawa, Hiroshi Katagiri, Atsuko Katagiri, Tomoka Ishibashi, Emi Sato, Kohji Iida, Razia Sultana, Satoru Kyo
Low-grade endometrial stromal sarcoma (LGESS) is a rare malignancy. The tumor is reportedly responsive to hormonal therapy, most commonly with medroxyprogesterone acetate (MPA), but the effectiveness of aromatase inhibitors for recurrent LGESS remains unclear. The present study reports a case of stage IC LGESS presenting with abnormal uterine bleeding, and also provides a review of the literature. Following a total abdominal hysterectomy and bilateral salpingo-oophorectomy, MPA therapy was initiated; treatment was successful, but discontinued 19 months later due to disruptive side effects...
November 2016: Oncology Letters
https://www.readbyqxmd.com/read/27866972/letrozole-regulates-actin-cytoskeleton-polymerization-dynamics-in-a-src-1-dependent-manner-in-the-hippocampus-of-mice
#2
Yangang Zhao, Yanlan Yu, Yuanyuan Zhang, Li He, Linli Qiu, Jikai Zhao, Mengying Liu, Jiqiang Zhang
In the hippocampus, local estrogens (E2) derived from testosterone that is catalyzed by aromatase play important roles in the regulation of hippocampal neural plasticity, but the underlying mechanisms remain unclear. The actin cytoskeleton contributes greatly to hippocampal synaptic plasticity; however, whether it is regulated by local E2 and the related mechanisms remain to be elucidated. In this study, we first examined the postnatal developmental profiles of hippocampal aromatase and specific proteins responsible for actin cytoskeleton dynamics...
November 17, 2016: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/27866938/ovulation-induction-in-polycystic-ovary-syndrome-current-options
#3
REVIEW
Richard S Legro
There are a variety of effective treatment options to induce ovulation in women with polycystic ovary syndrome (PCOS). The most effective treatments are primarily reproductive and target the hypothalamic-pituitary-ovarian (HPO) axis. Letrozole, an aromatase inhibitor, is headed toward replacing clomiphene, a selective estrogen receptor modulator, as the first-choice option. Metabolic treatments likely work indirectly through the HPO axis. Many metabolic treatments have shown initial promise and later failed (troglitozone or d-chiro-inositol) or disappointed (metformin); further studies are needed of newer agents to treat type 2 diabetes...
September 21, 2016: Best Practice & Research. Clinical Obstetrics & Gynaecology
https://www.readbyqxmd.com/read/27864574/enhancing-endocrine-therapy-combination-strategies-for-the-treatment-of-postmenopausal-hormone-receptor-positive-her2-advanced-breast-cancer
#4
REVIEW
Kathleen I Pritchard, Stephen K Chia, Christine Simmons, Deanna McLeod, Alexander Paterson, Louise Provencher, Daniel Rayson
: : Breast cancer (BC) is the most common malignancy in women worldwide, with approximately two-thirds having hormone receptor (HR)-positive tumors. New endocrine therapy (ET) strategies include combining ET agents as well as adding inhibitors targeting growth factors, angiogenesis, the mechanistic target of rapamycin, phosphoinositide 3-kinase (PI3K), or cyclin-dependent kinase 4/6 to ET. Level 1 evidence supports use of fulvestrant plus anastrozole or palbociclib plus letrozole as first-line therapy for HR-positive, HER2-negative advanced BC with special consideration for the former in ET-naïve patients, as well as everolimus plus exemestane or palbociclib plus fulvestrant as second-line therapy with special consideration in select first-line patients...
November 18, 2016: Oncologist
https://www.readbyqxmd.com/read/27861893/synaptopodin-is-regulated-by-aromatase-activity
#5
Lars Fester, Lepu Zhou, Christiana Ossig, Jan Labitzke, Corinna Bläute, Manuela Bader, Günter Vollmer, Hubertus Jarry, Gabriele M Rune
Locally synthesized estradiol plays an important role in synaptic plasticity in the hippocampus. We have previously shown that in hippocampal neurons, activity of the enzyme aromatase, which converts testosterone to estradiol, is reduced via Ca(2+) -dependent phosphorylation. Synaptopodin is a highly estrogen responsive protein, and it has been shown that it is an important regulator of synaptic plasticity, mediated by its close association to internal calcium stores. In this study, we show that the expression of synaptopodin is stronger in the hippocampus of female animals than in that of male animals...
November 8, 2016: Journal of Neurochemistry
https://www.readbyqxmd.com/read/27855085/comparison-of-acupuncture-pretreatment-followed-by-letrozole-versus-letrozole-alone-on-live-birth-in-anovulatory-infertile-women-with-polycystic-ovary-syndrome-a-study-protocol-for-a-randomised-controlled-trial
#6
Juan Li, Ernest Hung Yu Ng, Elisabet Stener-Victorin, Zhenxing Hu, Wanting Wu, Maohua Lai, Taixiang Wu, Hongxia Ma
INTRODUCTION: The high prevalence of insulin resistance in women with polycystic ovary syndrome (PCOS) is considered to be one of the major pathophysiological changes in PCOS that leads to anovulatory infertility. We hypothesise that electroacupuncture pretreatment improves insulin sensitivity and leads to a higher ovulation rate and greater chances of live birth after the induction of ovulation. The effect of electroacupuncture pretreatment followed by ovulation induction in women with anovulatory PCOS has not been investigated before, and we present here a randomised controlled trial to test this hypothesis by comparing electroacupuncture pretreatment followed by letrozole versus letrozole alone in anovulatory women with PCOS...
October 7, 2016: BMJ Open
https://www.readbyqxmd.com/read/27852078/clomiphene-citrate-versus-letrozole-for-ovarian-stimulation-in-therapeutic-donor-sperm-insemination
#7
Hady El Hachem, Roland Antaki, Camille Sylvestre, Isaac-Jacques Kadoch, Louise Lapensée, Pierre Emmanuel Bouet
AIM: To compare clomiphene citrate (CC) and letrozole for ovarian stimulation (OS) in therapeutic donor sperm insemination (TDI) cycles. METHODS: Retrospective cohort study between January 2011 and June 2014 at a University-affiliated private IVF clinic in Montreal, Canada. 257 normo-ovulatory women ≤40 years of age with no history of infertility undergoing 590 TDI cycles in the absence of a male partner (single women and same-sex couples) or azoospermia were included...
November 17, 2016: Gynecologic and Obstetric Investigation
https://www.readbyqxmd.com/read/27848887/metabolism-and-toxicological-implications-of-commonly-used-chemopreventive-drugs-against-breast-cancer-carcinogenesis
#8
Aliyu Muhammad, Mohammed Auwal Ibrahim, Ochuko Lucky Erukainure, Ibrahim Malami, Hadiza Sani, Hafsat Abdullahi Mohammed
BACKGROUND: Breast cancer has been reported to be among the frequently diagnosed cancer in women worldwide despite advances in early detection and treatment. Several drugs are currently used for chemoprevention as a result of a number of drawbacks associated with breast cancer therapy. AIM: This review focuses on the metabolism and toxicological implications of these drugs against breast cancer/carcinogenesis. METHODOLOGY: Relevant articles on the commonly used anti-breast cancer drugs (raloxifene, tamoxifen, anastrozole, letrozole and exemestane) used in chemoprevention were searched using the major scientific databases including Scopus, Embase, PubMed/ Medline, Sciencedirect and Google Scholar...
November 16, 2016: Current Drug Metabolism
https://www.readbyqxmd.com/read/27843622/review-of-hormone-based-treatments-in-postmenopausal-patients-with-advanced-breast-cancer-focusing-on-aromatase-inhibitors-and-fulvestrant
#9
REVIEW
Iben Kümler, Ann S Knoop, Christina A R Jessing, Bent Ejlertsen, Dorte L Nielsen
BACKGROUND: Endocrine therapy constitutes a central modality in the treatment of oestrogen receptor (ER)-positive advanced breast cancer. PURPOSE: To evaluate the evidence for endocrine treatment in postmenopausal patients with advanced breast cancer focusing on the aromatase inhibitors, letrozole, anastrozole, exemestane and fulvestrant. METHODS: A review was carried out using PubMed. Randomised phase II and III trials reporting on ≥100 patients were included...
2016: ESMO Open
https://www.readbyqxmd.com/read/27832985/effects-of-raloxifene-against-letrozole-induced-bone-loss-in-chemically-induced-model-of-menopause-in-mice
#10
Abul Kalam, Sushama Talegaonkar, Divya Vohora
INTRODUCTION: The deleterious effects of letrozole, an aromatase inhibitor, used in the adjuvant treatment of breast cancer in postmenopausal women, on bone are well-documented and represent a major drawback to its clinical use. Raloxifene, a selective estrogen receptor modulator and a clinically approved anti-osteoporotic drug, has been recently demonstrated to be efficacious in women with breast cancer. The present study evaluated the effects of preventive and curative treatment with raloxifene on letrozole-induced alterations of bone microarchitecture and turnover markers in a chemically-induced menopause model in mice...
November 8, 2016: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/27825272/cost-effectiveness-of-letrozole-and-purified-urinary-fsh-in-treating-women-with-clomiphene-citrate-resistant-polycystic-ovarian-syndrome-a-randomized-controlled-trial
#11
AbdelGany Hassan, Nesreen Shehata, Amr Wahba
We aimed to compare the cost effectiveness of letrozole versus purified urinary follicle stimulating hormone (FSH) in treating patients with clomiphene citrate (CC)-resistant polycystic ovary syndrome (PCOS). This was a randomized trial conducted in Cairo University and Beni-Suef University Hospitals, Egypt. A cohort of 140 eligible women was randomized to receive either letrozole 2.5 mg twice daily for five days, or FSH using a graduated regimen starting with a dose of 75 IU. Treatment was repeated for three months if pregnancy did not occur...
November 8, 2016: Human Fertility: Journal of the British Fertility Society
https://www.readbyqxmd.com/read/27821708/no-increased-risk-of-major-congenital-anomalies-or-adverse-pregnancy-or-neonatal-outcomes-following-letrozole-use-in-assisted-reproductive-technology
#12
T Tatsumi, S C Jwa, A Kuwahara, M Irahara, T Kubota, H Saito
STUDY QUESTION: Does letrozole use increase the risk of major congenital anomalies and adverse pregnancy and neonatal outcomes in fresh, single-embryo transfer? SUMMARY ANSWER: Letrozole significantly decreases the risk of miscarriage and does not increase the risk of major congenital anomalies or adverse pregnancy or neonatal outcomes compared with natural cycles in patients undergoing ART. WHAT IS KNOWN ALREADY: Letrozole is the most commonly used aromatase inhibitor for mild ovarian stimulation in ART...
November 7, 2016: Human Reproduction
https://www.readbyqxmd.com/read/27817058/aromatase-inhibitor-induced-carpal-tunnel-syndrome-prevalence-in-daily-practice
#13
Labidi Soumaya, Mejri Nesrine, El Benna Houda, Afrit Mehdi, Lakhdhar Sarra, Boussen Hamouda
INTRODUCTION: We aim to evaluate prevalence and characteristics of CTS in routine daily practice over a 5-year period, with a review of the literature. METHODS: Patients treated with endocrine therapy (441) were retrospectively analyzed looking for CTS cases in aromatase inhibitors (219, 49.6%) and in tamoxifen (222, 50.3%) patients. We described patient's characteristics and CTS management. We also reviewed the literature reporting CTS in aromatase inhibitors clinical trials...
December 2016: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/27810861/ribociclib-lengthens-breast-cancer-survival
#14
(no author information available yet)
The combination of antiestrogen therapy and ribociclib, an investigational CDK4/6 inhibitor, led to improved outcomes in women with metastatic HR-positive, HER2-negative breast cancer, according to findings presented at a meeting of the European Society for Medical Oncology. The combination significantly increased progression-free survival compared with letrozole alone in a large phase III trial-data that could lead to FDA approval.
November 3, 2016: Cancer Discovery
https://www.readbyqxmd.com/read/27802776/hydrophobic-amino-acids-grafted-onto-chitosan-a-novel-amphiphilic-chitosan-nanocarrier-for-hydrophobic-drugs
#15
Marjan Motiei, Soheila Kashanian, Avat Arman Taherpour
OBJECTIVE: To develop a novel biocompatible amphiphilic drug delivery for hydrophobic drugs, chitosan (CS) was grafted to a series of hydrophobic amino acids including L-alanine (A), L-proline (P) and L-tryptophan (W) by carbodiimide mediated coupling reaction. MATERIALS AND METHODS: Chemical characteristics of the modified polymers were determined and confirmed by FT-IR, (1)H-NMR, and UV-vis spectroscopy and the degree of substitution was quantified by elemental analysis...
November 2, 2016: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/27801959/different-synaptic-stimulation-patterns-influence-the-local-androgenic-and-estrogenic-neurosteroid-availability-triggering-hippocampal-synaptic-plasticity-in-the-male-rat
#16
Michela Di Mauro, Alessandro Tozzi, Paolo Calabresi, Vito Enrico Pettorossi, Silvarosa Grassi
Electrophysiological recordings were used to investigate the role of the local synthesis of 17β-estradiol (E2) and 5α-dihydrotestosterone (DHT) on synaptic long-term effects induced in the hippocampal CA1 region of male rat slices. Long-term depression (LTD) and long-term potentiation (LTP), induced by different stimulation patterns, were examined under the block of the DHT synthesis by finasteride, and the E2 synthesis by letrozole. We used low frequency stimulation (LFS) for LTD, high frequency stimulation (HFS) for LTP, and intermediate patterns differing in duration or frequency...
November 1, 2016: European Journal of Neuroscience
https://www.readbyqxmd.com/read/27790765/acupuncture-does-not-restore-metabolic-disturbances-in-the-p450-aromatase-inhibitor-induced-polycystic-ovary-syndrome-rat-model
#17
Manuel Maliqueo, Anna Benrick, Rodrigo Rodrigues Marcondes, Julia Johansson, Miao Sun, Elisabet Stener-Victorin
Low-frequency electroacupuncture restores sex steroid synthesis and sympathetic activity in women with polycystic ovary syndrome, which may improve its metabolic disturbances likely by modulating sympathetic nerve activity or sex steroid synthesis. We investigated whether low-frequency electroacupuncture regulates the metabolic function to the same extent as treatment with estradiol or β-adrenergic blocking in a rat model of polycystic ovary syndrome induced by a P450 aromatase inhibitor (letrozole). Letrozole (200 μg per day) or placebo pellets were implanted in pre-pubertal Wistar rats...
October 28, 2016: Experimental Physiology
https://www.readbyqxmd.com/read/27785059/impact-of-palbociclib-combinations-on-treatment-of-advanced-estrogen-receptor-positive-human-epidermal-growth-factor-2-negative-breast-cancer
#18
REVIEW
Katalin Boér
Breast cancer is a heterogeneous disease with multiple subgroups based on clinical and molecular characteristics. For the largest subgroup of breast cancers, hormone receptor-positive/human epidermal growth factor 2 (HER2)-negative tumors, hormone treatment is the mainstay of therapy and is likely to result in significant improvement in disease outcomes. However, some of these cancers demonstrate de novo or acquired resistance to endocrine therapy. Despite intensive research to develop new strategies to enhance the efficacy of currently available treatment options for hormone receptor-positive breast cancer, progress has been slow, and there were few advances for a period of 10 years...
2016: OncoTargets and Therapy
https://www.readbyqxmd.com/read/27785049/preventive-effect-of-zoledronic-acid-on-aromatase-inhibitor-associated-bone-loss-for-postmenopausal-breast-cancer-patients-receiving-adjuvant-letrozole
#19
Shengliang Sun, Fuchao Wang, Honglei Dou, Longqiang Zhang, Jiwen Li
BACKGROUND: This study aims to compare the efficacy and safety between zoledronic acid combined with calcium and calcium alone to prevent aromatase inhibitor-associated bone loss for postmenopausal breast cancer patients receiving adjuvant letrozole. METHODS: One hundred twenty patients were randomly divided into two groups, A and B. Patients in group A (n=60) received modified radical mastectomy or breast-conserving surgery + four cycles of AC followed by T regimen (optional) + radiotherapy (optional) + letrozole 2...
2016: OncoTargets and Therapy
https://www.readbyqxmd.com/read/27779913/estrogen-suppresses-interaction-of-melanocortin-2-receptor-and-its-accessory-protein-in-the-primate-fetal-adrenal-cortex
#20
Jeffery S Babischkin, Graham W Aberdeen, Gerald J Pepe, Eugene D Albrecht
We have shown that fetal adrenal fetal zone (FZ) volume and serum dehydroepiandrosterone sulfate (DHAS) levels were increased, whereas definitive and transitional zone (DZ/TZ) volume was unaltered, in baboons in which estrogen levels were suppressed by administration of the aromatase inhibitor letrozole. The interaction of the melanocortin 2 receptor (MC2R) with its accessory protein (MRAP) is essential for trafficking MC2R to the adrenal cell surface for binding to ACTH. The present study determined whether the estrogen-dependent regulation of fetal adrenocortical development is mediated by ACTH and/or expression/interaction of MC2R and MRAP...
October 25, 2016: Endocrinology
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