InformationClinical trials have complex eligibility criteria.
Always talk to your clinician about you’re interest in participating in a trial.
Learn why

Optimise reading forHealth ProfessionalsPatients

Closed (no longer recruiting)Last updated: 11 April 2024

persevERA: This phase III trial is comparing the safety and effectiveness of two oral hormone therapy drugs in patients with ER+, HER2- breast cancer that has spread locally or to other parts of the bodyA Phase III Randomized, Double-Blind, Placebo-Controlled, Multicenter Study Evaluating the Efficacy and Safety of GDC-9545 Combined With Palbociclib Compared With Letrozole Combined With Palbociclib in Patients With Estrogen Receptor-Positive, HER2-Negative Locally Advanced or Metastatic Breast Cancer

Clinical summary

Summary

Eligible patients will be randomly selected to receive oral GDC-9545 or oral Letrozole once per day on Days 1-28 of each 28-day treatment cycle, plus 125mg Palbociclib once per day on Days 1-21 of each 28-day treatment cycle. Patients that are premenopausal or male will also receive a luteinizing hormone-releasing hormone (LHRH) agonist on Day 1 of each 28-day treatment cycle, as determined and supplied by the investigator.

Conditions

This trial is treating patients with breast cancer

Cancer

Breast Cancers Breast

Age

People18+

Phase

III

Trial Acronym

persevERA

More information

Trial Identifiers

Use the hyperlinks, where available to access additional clinical trial information.

Trial sponsor

Hoffmann-La Roche

Scientific Title

A Phase III Randomized, Double-Blind, Placebo-Controlled, Multicenter Study Evaluating the Efficacy and Safety of GDC-9545 Combined With Palbociclib Compared With Letrozole Combined With Palbociclib in Patients With Estrogen Receptor-Positive, HER2-Negative Locally Advanced or Metastatic Breast Cancer

Eligibility

Inclusion

  • For women who are premenopausal or perimenopausal and for men: treatment with approved LHRH agonist therapy for the duration of study treatment
  • Locally advanced (recurrent or progressed) or metastatic adenocarcinoma of the breast, not amenable to treatment with curative intent
  • Documented ER-positive tumor and HER2-negative tumor, assessed locally
  • Patients who have bilateral breast cancers which are both ER-positive and HER2-negative can be included in the study because the metastases are suitably targeted by the study treatments. If patients have bilateral tumors which are of different biomarker status, then proof of the ER and HER2 status of the metastases is required for study entry
  • No history of systemic anti-cancer therapy for locally advanced (recurrent or progressed) or metastatic disease
  • Disease recurrence from early-stage breast cancer after standard adjuvant endocrine therapy meeting the protocol-defined criteria of having received at least 24 months of treatment without disease progression during treatment and a disease-free interval since the completion of treatment that was greater than 12 months
  • Measurable disease as defined per RECIST v.1.1 or bone only disease which must have at least one predominantly lytic bone lesion confirmed by CT or MRI which can be followed
  • Eastern Cooperative Oncology Group Performance Status 0-1
  • Adequate organ function

Exclusion

  • Disease recurrence during or within 12 months of completing prior neoadjuvant or adjuvant treatment with any CDK4/6 inhibitor
  • Prior treatment with a selective estrogen receptor degrader (SERD)
  • Treatment with any investigational therapy within 28 days prior to study treatment
  • Treatment with strong CYP3A inhibitors or inducers within 14 days or 5 drug elimination half-lives (whichever is longer) prior to randomization
  • Advanced, symptomatic, visceral spread that is at risk of life-threatening complications in the short term
  • Known active uncontrolled or symptomatic CNS metastases, carcinomatous meningitis, or leptomeningeal disease
  • Active cardiac disease or history of cardiac dysfunction, as defined in the protocol
  • Pregnant or breastfeeding

Inclusion

  • Your cancer has spread to other parts of the body.

Exclusion

  • You have been diagnosed with a prior or secondary type of cancer.
  • You have certain types of non-cancer medical conditions.
  • You have had certain treatments, surgical procedures or drugs.
  • You have previously been treated (or are currently being treated) on a clinical trial.
Message

Clinical trials have complex eligibility criteria.

Ask your doctor if this trial could be right for you.

Participating hospitals

+ Show non-recruiting hospitals

Closed hospitals

Completed hospitals

InformationTell us if you find this trial availability is not accurate.Report inaccuracy

Get Support

Example

Cancer Connect

You might find it helpful to speak to someone who has 'been there before'. Our Cancer Connect program can provide one-on-one phone support from someone who understands what you're going through and has clinical trials experience.

Learn more

Example

Cancer Council’s cancer nurses

If you need cancer information and practical support for yourself, a carer, family or friend, contact Cancer Council’s experienced cancer nurses on 131120.

Learn more

Example

Information for family, friends and carers

When you are considering a cancer clinical trial, it is a good idea to discuss it with your family, friends or carers.

Learn more

Victorian Cancer Registry Victorian Government

The Victorian Cancer Trials Link is supported by the Victorian Government through the Victorian Cancer Agency.

RAP

Cancer Council Victoria would like to acknowledge the traditional custodians of the land on which we live and work. We would also like to pay respect to the elders past and present and extend that respect to all other Aboriginal people.