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Phase II: Inavolisib in Breast Cancer (optINAVO)

Clinical Trial Overview

Clinical Trial Overview

Recruiting

A Phase II, Randomized, Open-Label Study Evaluating Two Inavolisib Dose Levels in Combination With Fulvestrant in Participants With PIK3CA-Mutated, HR-Positive, HER2-Negative Locally Advanced or Metastatic Breast Cancer

Objective

The purpose of this study is to evaluate the efficacy and safety of inavolisib in combination with fulvestrant compared with inavolisib in combination with fulvestrant in participants with PIK3CA-mutated, HR-positive, HER2-negative locally advanced or metastatic breast cancer (LA/mBC) in the post-cyclin-dependent kinase inhibitor (CDKi) setting.

Primary Endpoints

  • Percentage of Participants With Objective Response Rate (ORR)
  • Percentage of Participants With Treatment Emergent Adverse Events (TEAEs)

Secondary Endpoints

  • Duration of Response (DOR)
  • Time to Response (TTR)
  • Progression-free Survival (PFS)
  • Percentage of Participants With Treatment Discontinuation due to Adverse Events
  • Number of Participants Reporting Presence, Frequency, Severity and/or Degree of Interference With Daily Activities of Symptomatic Treatment Toxicities as Assessed by NCI Patient-Reported Outcomes Common Terminology Criteria for Adverse Events (PRO-CTCAE)
  • Percentage of Participants Reporting Presence and Frequency of Selected Hyperglycemia Symptoms as Assessed by European Organisation for Research and Treatment of Cancer (EORTC) IL382
  • Percentage of Participants Reporting Each Response Option at Each Time Point for the Treatment Side-Effect Bother Item General Population, Question 5 (GP5) From the Functional Assessment of Cancer Therapy - General (FACT-G) Questionnaire
  • Change from Baseline in Symptomatic Treatment-Related Toxicities as Assessed Through use of the PRO-CTCAE
  • Change from Baseline in Selected Hyperglycemia Symptoms as Assessed by EORTC IL382
  • Change from Baseline in Treatment Side-effect Bother as Assessed Through use of the FACT-G GP5 Item

Inavolisib

Other names: RG6114; RO7113129

Modality: Phosphoinositide 3-kinase (PI3K) inhibitor

Disease/Condition: Breast Cancer


ADDITIONAL RESOURCES

Inclusion and Exclusion Criteria

Inclusion and Exclusion Criteria

Inclusion Criteria
  • Documented ER +/ HER2- tumor according to American Society of Clinical Oncology/College of American Pathologists (ASCO/CAP) guidelines
  • Disease progression after or during treatment with a combination of CDK4/6i and endocrine therapy: <= 1 prior lines of systemic therapy in the locally advanced (recurrent or progressed) or metastatic setting
  • Measurable or evaluable disease per Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST v1.1)
  • Participants for whom endocrine-based therapy is recommended and treatment with cytotoxic chemotherapy is not indicated at time of entry into the study, as per national or local treatment guidelines
  • Confirmation of biomarker eligibility: presence of >= 1 study-eligible PIK3CA mutation
  • Life expectancy of > 6 months
  • Ability, in the investigator's judgment, and willingness to comply with all study -related procedures, including completion of patient-reported outcomes
Exclusion Criteria
  • Metaplastic breast cancer
  • Prior treatment with chemotherapy in the recurrent locally advanced/metastatic setting
  • Type 2 diabetes requiring ongoing systemic treatment at the time of study entry; or any history of Type 1 diabetes
  • Prior treatment with PI3K/Akt/mTOR inhibitors in the recurrent locally advanced/metastatic setting
  • Requirement for daily supplemental oxygen
  • Symptomatic active lung disease, including pneumonitis
Study Site Locations

2 Results

    Enrollment and Resources

    Enrollment & Resources

    Enrollment

    For more information on eligibility criteria, view the study or reach out to our team.

    Call icon

    Phone

    1-888-662-6728
    (US and Canada)

    Resources

    ClinicalTrials.gov

    Learn more about this trial (NCT07368998) on ClinicalTrials.gov.

    Patient Resources

    Genentech offers a place for patients, relatives, and caregivers to learn more about clinical trials.

    Information is consistent with ClinicalTrials.gov as of July 31, 2026. Products under investigation have not been approved for use outside of the clinical trial setting. This information is presented only for the purposes of providing an overview of clinical trials and should not be construed as a recommendation for use of any product for unapproved purposes.

    Looking for more information?

    Reach out to a Genentech Medical Science Liaison near you, or connect with the contact center.

    Call the Trial Information Support Team: 1-888-662-6728 Hours: Monday-Friday, 5am-5pm PT

    • AD
      Alzheimer's disease

    • ABC
      advanced breast cancer

    • bADLs
      Basic activities of daily living

    • ISLT
      International Shopping List Test

    • MCI
      Mild cognitive impairment

    • CV
      coefficient of variation

    • HEX
      cell hexagonality

    • PDS
      Port Delivery System

    • Q24W
      once every 24 weeks

    • BMI
      Body mass index

    • HbA1c
      hemoglobin A1C

    • HOMA-IR
      Homeostasis Model Assessment of Insulin Resistance

    • NLM
      National Library of Medicine

    • QUICKI
      Quantitative Insulin Sensitivity Check Index

    • SGLT-2
      sodium-glucose cotransporter-2

    • SMBG
      Self-Monitored Blood Glucose

    • T1DM
      Type 1 Diabetes Mellitus

    • T2DM
      Type 2 diabetes mellitus

    • AE
      adverse events

    • AESI
      Adverse Events of Special Interest

    • MDD
      major depressive disorder

    • PHQ-9
      Patient Health Questionnaire-9

    • SAE
      serious adverse events

    • ABR
      Annualized Bleed Rate

    • CBR
      clinical benefit rate

    • CDK4/6i
      cyclin-dependent kinase 4 and 6 inhibitor

    • CNS
      central nervous system

    • CR
      complete response

    • DoR
      duration of response

    • ER
      estrogen receptor

    • HER2
      human epidermal growth factor receptor 2

    • HER2-
      human epidermal growth factor receptor 2-negative

    • HR
      hormone receptor

    • HR+
      hormone receptor-positive

    • mut
      mutated

    • NIS
      non-interventional study

    • ORR
      objective response rate

    • OS
      overall survival

    • PFS
      progression-free-survival

    • PIK3CA
      phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha

    • PIK3CAm
      PIK3CA-mutated

    • PK
      pharmacokinetics

    • PROs
      patient-reported outcomes

    • SD
      stable disease

    • SoC
      standard of care

    • VWD
      von Willebrand disease

    • WHO
      World Health Organization

    • T2D
      Type 2 diabetes

    • T1D
      Type 1 Diabetes

    • ADA
      anti-drug antibody

    • DXA
      Dual-energy X-ray Absorptiometry

    • ASCVD
      atherosclerotic cardiovascular disease

    • FGF21
      fibroblast growth factor 21

    • SHTG
      severe hypertriglyceridemia

    • TG
      triglycerides

    • MASH
      metabolic dysfunction-associated steatohepatitis

    • NAFLD
      non-alcoholic fatty liver disease

    • NAS
      NAFLD Activity Score

    • NASH
      nonalcoholic steatohepatitis

    • pmMS
      partial modified Mayo

    • CD
      Crohn's disease

    • CMV
      cytomegalovirus

    • HIV
      human immunodeficiency virus

    • HBV
      Hepatitis B

    • HCV
      Hepatitis C

    • TB
      tuberculosis

    • UC
      ulcerative colitis

    • TL1A
      tumor necrosis factor-like ligand 1A

    • mMS
      modified Mayo Score

    • APS
      average daily abdominal pain scores in the past week

    • CDAI
      Crohn’s Disease Activity Index

    • IBDQ
      Inflammatory Bowel Disease Questionnaire

    • SF
      stool frequency subscore

    • PBO
      Placebo

    • EASI
      Eczema Area and Severity Index

    • IGA
      Investigator Global Assessment

    • NRS
      Numerical Rating Scale

    • IM
      intramuscular

    • IL
      intralesional

    • PDE-4
      Phosphodiesterase-4

    • ACE
      angiotensin-converting enzyme

    • ARBs
      angiotensin II receptor blockers

    • ASO
      Antisense Oligonucleotide

    • CKD-EPI
      Chronic Kidney Disease Epidemiology Collaboration

    • eGFR
      Estimated Glomerular Filtration Rate

    • FACIT-F
      Functional Assessment of Chronic Illness Therapy-Fatigue subscale

    • g/day
      gram per day

    • g/g
      gram per gram

    • GIP
      Glucose-dependent Insulinotropic Polypeptide

    • GLP-1
      Glucagon-like Peptide-1

    • IgAN
      IgA nephropathy

    • mg/day
      milligrams per day

    • TEAEs
      Treatment-Emergent Adverse Events

    • UPCR
      Urine Protein-to-Creatinine Ratio

    • AEs
      Adverse events

    • ALT
      Alanine aminotransferase

    • AST
      Aspartate aminotransferase

    • C-SSRS
      Columbia-Suicide Severity Rating Scale

    • DMT
      Disease-modifying therapy

    • ECG
      Electrocardiogram

    • EDSS
      Expanded Disability Status Scale

    • Gd
      Gadolinium

    • IPMSSG
      International Pediatric Multiple Sclerosis Study Group

    • MRI
      Magnetic resonance imaging

    • MS
      Multiple sclerosis

    • PD
      Pharmacodynamic

    • PPMS
      Primary progressive multiple sclerosis

    • RMS
      Relapsing multiple sclerosis

    • SI
      Suicidal ideation

    • SPMS
      Secondary progressive multiple sclerosis

    • CYP3A4
      cytochrome-p450-3a4

    • ADAS-Cog-13
      Alzheimer's Disease Assessment Scale-Cognition 13

    • ADAs
      Anti-drug antibodies

    • ADCS-ADL
      Alzheimer's Disease Cooperative Study Activities of Daily Living Inventory

    • CDR-GS
      Clinical Dementia Rating, Global Score

    • CDR-SB
      Clinical Dementia Rating, Sum of Boxes

    • CSF
      Cerebrospinal fluid

    • GFAP
      Glial fibrillar acidic protein

    • iADRS
      Integrated Alzheimer's Disease Rating Scale

    • MMSE
      Mini-Mental State Examination

    • PET
      Positron emission tomography

    • RBANS DMI
      Repeatable Battery for the Assessment of Neuropsychological Status Delayed Memory Index

    • EORTC QLQ-C30
      European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire

    • PRO-CTCAE
      Patient-Reported Outcomes Common Terminology Criteria for Adverse Events

    • TTCD
      Time to Confirmed Deterioration

    • AJCC
      American Joint Committee on Cancer Staging System

    • ECOG
      Eastern Cooperative Oncology Group

    • FFPE
      formalin-fixed, paraffin-embedded

    • RECIST
      Response Evaluation Criteria in Solid Tumors

    • NSCLC
      non-small cell lung cancer

    • BICR
      blinded independent central review

    • CD137
      Cluster of Differentiation 137

    • EORTC QLQ-LC13
      European Organisation for Research and Treatment of Cancer Quality-of-Life Questionnaire-Supplemental Lung Cancer Module

    • KRAS G12C
      Kirsten rat sarcoma viral oncogene homolog G12C

    • PD-L1
      Programmed death-ligand 1

    • RAS
      RAt Sarcoma

    • RT
      Radiation therapy

    • DOCR
      duration of complete response

    • DFS
      disease-free survival

    • EFSeff
      event-free survival efficacy causes

    • FACT-Lym LymS
      lymphoma subscale within the functional assessment of cancer therapy-Lymphoma questionnaire

    • IPI
      international prognostic index

    • IRF
      Independent Review Facility

    • Pola-R-CHP
      polatuzumab vedotin plus rituximab, cyclophosphamide, doxorubicin, and prednisone

    • LBCL
      large B-cell lymphoma

    • PROMIS-29
      Patient-Reported Outcomes Measurement Information System-29

    • ESR1nmd
      ESR1 no-mutation-detected

    • IV
      intravenous

    • II
      2

    • ECD
      endothelial cell density

    • III
      3

    • SC
      Subcutaneous

    +