Neoplasms

Skin and Connective Tissue Diseases

All Conditions

Breast Neoplasms

Breast Diseases

Skin Diseases

Bone Density Conservation Agents

Antineoplastic Agents

All Drugs and Chemicals

Tamoxifen

Hormones

Exemestane

Letrozole

Estrogens

Prolactin Release-Inhibiting Factors

Anastrozole

Aromatase Inhibitors

In this substudy, participants will receive giredestrant in combination with abemaciclib for up to 2 years. Participants will continue with giredestrant monotherapy for an additional 3 years in order to complete a total of 5 years on study treatment.

Giredestrant 30 milligrams (mg) will be administered orally once a day (QD) on Days 1-28 of each 28-day cycle for 5 years or until disease recurrence or unacceptable toxicity (whichever occurs first).

Giredestrant

The endocrine therapy of physician's choice (TPC) is limited to tamoxifen or one of the specified third generation aromatase inhibitors: letrozole, anastrozole, or exemestane. Participants will receive TPC daily on Days 1-28 of each 28-day cycle for 5 years or until disease recurrence or unacceptable toxicity (whichever occurs first). Continuing TPC after 5 years is at the discretion of the investigator and per local standard of care. Dose administration of TPC should be performed in accordance with the local prescribing information for the respective product.

Endocrine Therapy of Physician's Choice

A luteinizing hormone-releasing hormone (LHRH) agonist will be administered to male participants and premenopausal/perimenopausal participants according to local prescribing information. The investigator may determine and supply the appropriate LHRH agonist locally approved for use in breast cancer.

LHRH Agonist

Abemaciclib 150 mg will be administered orally (PO) twice a day (BID) on Days 1-28 during each 28-day cycle for 2 years or until disease recurrence or unacceptable toxicity (whichever occurs first).

Abemaciclib

Reference Study ID Number: GO42784 https://forpatients.roche.com/

Clinical Trials

This is a Phase III, global, randomized, open-label, multicenter, study evaluating the efficacy and safety of adjuvant giredestrant compared with endocrine therapy of physician's choice in participants with medium- and high-risk Stage I-III histologically confirmed estrogen receptor (ER)-positive and human epidermal growth factor receptor 2 (HER2)-negative early breast cancer.

In addition, an open-label exploratory substudy will explore the safety and efficacy of giredestrant in combination with abemaciclib in a subset of the primary study population.

A Study Evaluating the Efficacy and Safety of Adjuvant Giredestrant Compared With Physician's Choice of Adjuvant Endocrine Monotherapy in Participants With Estrogen Receptor-Positive, HER2-Negative Early Breast Cancer (lidERA Breast Cancer)

A Phase III, Randomized, Open-Label, Multicenter Study Evaluating the Efficacy and Safety of Adjuvant Giredestrant Compared With Physician's Choice of Adjuvant Endocrine Monotherapy in Patients With Estrogen Receptor-Positive, HER2-Negative Early Breast Cancer

For eligible studies, qualified researchers may request access to individual patient level data through the request platform (www.vivli.org). Further details on Roche's criteria for eligible studies are available here (https://vivli.org/ourmember/roche/).

For further details on Roche's Global Policy on the Sharing of Clinical Information and how to request access to related clinical study documents, see here (https://www.roche.com/innovation/process/clinical-trials/data-sharing/).

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization	Link
A Study Evaluating the Efficacy and Safety of Adjuvant Giredestrant Compared With Physician's Choice of Adjuvant Endocrine Monotherapy in Participants With Estrogen Receptor-Positive, HER2-Negative Early Breast Cancer (lidERA Breast Cancer)	NCT04961996	Early Breast Ca...	Giredestrant Endocrine Thera... LHRH Agonist Abemaciclib	18 Years -	Hoffmann-La Roche
A Study Evaluating the Efficacy and Safety of Adjuvant Giredestrant Compared With Physician's Choice of Adjuvant Endocrine Monotherapy in Participants With Estrogen Receptor-Positive, HER2-Negative Early Breast Cancer (lidERA Breast Cancer)	NCT04961996	Early Breast Ca...	Giredestrant Endocrine Thera... LHRH Agonist Abemaciclib	18 Years -	Hoffmann-La Roche

Spots Global Cancer Trial Database for endocrine therapy of physician's choice