Aromatase Inhibitor News and Research

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Aromatase Inhibitors are drugs that prevent the formation of estradiol, a female hormone, by interfering with an aromatase enzyme. Aromatase inhibitors are used as a type of hormone therapy for postmenopausal women who have hormone-dependent breast cancer.

PMOS rethink reframes a common hormone disorder as a whole-body disease

A new review reframes PCOS, now proposed as PMOS, as a systemic endocrine and metabolic disorder shaped by genetic, epigenetic, ovarian, metabolic, and neuroendocrine pathways. It highlights why inconsistent diagnosis and symptom-focused care have limited progress, while targeted therapies, biomarkers, machine learning, and organ-on-chip models may support more personalized treatment.

18 Jun 2026

Low-dose megestrol strengthens hormone therapy in ER-positive breast cancer

Low-dose megestrol enhances hormone therapy for ER-positive breast cancer, reducing tumor proliferation and improving treatment adherence in the PIONEER trial.

7 Jan 2026

Study brings hope for a more personalized approach to treat ER+ breast cancer

A new study from researchers at Baylor College of Medicine brings hope for a more personalized approach to treat estrogen receptor-positive (ER+) breast cancer, the most common type of this cancer.

28 Aug 2025

New compound shows promise against aromatase inhibitor-resistant breast cancer

A new research paper was published in Volume 16 of Oncotarget on July 29, 2025, titled "PCAIs stimulate MAPK, PI3K/AKT pathways and ROS-Mediated apoptosis in aromatase inhibitor-resistant breast cancer cells while disrupting actin filaments and focal adhesion."

13 Aug 2025

Dual cancer drugs restore memory and rewire brain cells in Alzheimer’s mouse models

Researchers identified a combination of two existing cancer drugs, letrozole and irinotecan, that reversed Alzheimer’s disease-related changes in brain cell networks and improved memory in mouse models. The study supports a multi-cell-type, network-correcting strategy as a promising path for future Alzheimer’s treatments.

22 Jul 2025

Early camizestrant therapy keeps advanced breast cancer in check

Switching to camizestrant, a next-generation oral SERD, significantly prolongs progression-free survival and maintains quality of life in patients with ESR1-mutated, hormone receptor-positive advanced breast cancer. The proactive, biomarker-guided approach allows earlier intervention and may redefine standard care.

3 Jun 2025

Treatment switching guided by liquid biopsy results improves outcomes in advanced breast cancer

A large prospective, randomized clinical trial in patients with advanced breast cancer has found that the use of liquid biopsy blood tests for early detection of a treatment-resistance mutation, followed by a switch to a new type of treatment, substantially extends the period of tumor control compared to standard care.

1 Jun 2025

Imlunestrant offers new hope for ER-positive HER2-negative breast cancer

Imlunestrant, an investigational next-generation selective estrogen receptor degrader (SERD), improved progression-free survival in patients with endocrine therapy-pretreated, ER-positive, HER2-negative advanced breast cancer - as monotherapy in patients with ESR1 mutations and as combination therapy with abemaciclib (Verzenio) in all patients, regardless of ESR1 mutation status - according to results from the phase III EMBER-3 clinical trial presented at the San Antonio Breast Cancer Symposium (SABCS), held December 10-13, 2024.

11 Dec 2024

Extended estrogen suppression treatment found safe for postmenopausal breast cancer patients

New evidence shows that extended estrogen suppression treatment using an aromatase inhibitors for hormone receptor-positive postmenopausal breast cancer is safe; it does not increase the risk of coronary artery calcification, a sign of active coronary atherosclerosis, as some prior studies had indicated.

18 Sep 2024

New treatment approach improves recurrence-free survival in early breast cancer patients

A new treatment approach that combines a targeted therapy drug with hormone therapy significantly increased the amount of time a person with stage 2 or 3 HR-positive, HER2-negative early breast cancer lives without the cancer returning, according to a new study co-led by UCLA Health Jonsson Comprehensive Cancer Center investigators.

20 Mar 2024

The metabolic effects of endocrine therapy on diabetes mellitus in breast cancer survivors

Researchers discuss the history of endocrine therapies, highlights their adverse metabolic effects, and emphasizes the need for better biomarkers of diabetes.

5 Oct 2023

Less is more: Radiotherapy omission deemed safe for certain breast cancer patients

The risk of breast cancer recurrence after breast-conserving surgery.

22 Aug 2023

Scientists to discuss the latest cancer therapies, advances in PSMA PET scans and many more at ASCO

Physicians and scientists from the UCLA Jonsson Comprehensive Cancer Center will discuss the latest research and clinical trial results on combination therapies for breast cancer, a potential new treatment for patients with recurrent glioma, and advances in PSMA PET guided radiotherapy for patients with prostate cancer, among other topics, at the American Society of Clinical Oncology's annual meeting.

23 May 2023

Cyclical estrogen/anti-estrogen therapy could be a promising strategy to treat metastatic ER+ breast cancer

Advanced or metastatic estrogen receptor-positive (ER+) breast cancer is commonly treated with drugs that block the estrogen receptor.

15 May 2023

Addition of capivasertib to fulvestrant doubles progression-free survival in HR-positive breast cancer patients

In patients with hormone receptor (HR)-positive, HER2-negative tumors resistant to aromatase inhibitors, addition of the investigational AKT inhibitor capivasertib to fulvestrant (Faslodex) doubled the median progression-free survival compared with placebo plus fulvestrant in the phase III CAPItello-291 clinical trial, according to results presented at the San Antonio Breast Cancer Symposium, held December 6-10, 2022.

9 Dec 2022

Study reports overall response of HER2-low breast cancer patients to neoadjuvant T-DXd treatment

Patients with localized, hormone receptor-positive, HER2-low breast cancer treated with trastuzumab deruxtecan (T-DXd, Enhertu) in the neoadjuvant setting had an overall response rate of 75 percent in the absence of anastrozole and 63 percent in combination with anastrozole, according to results from the phase II TRIO-US B-12 TALENT trial presented at the San Antonio Breast Cancer Symposium, held December 6-10, 2022.

7 Dec 2022

Combination therapy shows promising results in patients with recurrent ER-positive endometrial cancer

A combination therapy that targets cancer cells from within and without caused tumors to shrink or stabilize in 75% of patients with recurrent or persistent estrogen receptor- (ER-) positive endometrial cancer, results from a recent clinical trial show.

19 Mar 2022

Ribociclib plus endocrine therapy offers survival benefit for postmenopausal patients with metastatic breast cancer

A study led by researchers from The University of Texas MD Anderson Cancer Center showed a significant overall survival benefit with ribociclib plus endocrine therapy for postmenopausal patients with hormone receptor-positive (HR+) human epidermal growth factor receptor 2-negative (HER2-) metastatic breast cancer.

10 Mar 2022

KU researcher wins $1.25 million award to investigate the vital role of sex hormones in tissue repair

Our ability to heal and regenerate new tissue after an injury has much to do with biological sex. For instance, following menopause, the loss of sex-hormone signaling in women can lead to degenerative diseases such as osteoporosis and osteoarthritis, where bone and cartilage degrade and become more delicate and brittle because of tissue loss.

21 Sep 2021

Novel anti-hormonal therapy may be a new treatment option for early-stage breast cancer

Early results from a UCLA-led clinical trial found treating women with estrogen receptor (ER)-positive and human epidermal growth factor receptor-2 (HER2)-negative early breast cancers with a novel type of anti-hormonal therapy, called an oral selective estrogen receptor degrader (SERD), led to clinically meaningful reductions in tumor activity prior to surgery.