HR Positive/HER2 Negative Lobular Carcinoma

Priority Review recognizes the best-in-class potential of the inavolisib-based regimen for patients in urgent need of new treatment options Additional analyses of INAVO120 will be presented in an oral abstract session at the 2024 American Society of Clinical Oncology Annual Meeting The target action date for the FDA decision is November 27, 2024 SOUTH SAN FRANCISCO, Calif.--(BUSINESS WIRE)-- Genentech, a member of the Roche Group (SIX: RO, ROG; OTCQX: RHHBY), announced today that the U.S. Food and Drug Administration (FDA) has accepted the company’s New Drug Application and granted Priority Review to inavolisib, an investigational oral therapy, in combination with palbociclib (Ibrance®) and fulvestrant. The inavolisib-based regimen was evaluated in adult patients with PIK3CA-mutated, hormone receptor (HR)-positive, human epidermal growth factor receptor 2 (HER2)-negative, locally advanced or metastatic breast cancer, following recurrence on or within 12 months of completing adjuvant endocrine treatment. The Priority Review is based on the positive Phase III INAVO120 results, which showed the inavolisib-based regimen more than doubled progression-free survival, reducing the risk of disease worsening or death by 57% compared to palbociclib and fulvestrant alone (15.0 months vs. 7.3 months; hazard ratio [HR]=0.43, 95% CI: 0.32-0.59, p<0.0001) in the first-line setting. Overall survival (OS) data were immature at the time of primary analysis, but a clear positive trend was observed (stratified HR=0.64, 95% CI: 0.43-0.97, p=0.0338 [boundary of 0.0098]). Follow-up for OS is continuing to the next analysis. “The addition of inavolisib to standard of care treatment significantly delayed disease progression in the first-line setting and has the potential to extend survival for people with metastatic breast cancers that harbor PIK3CA mutations,” said Levi Garraway, M.D., Ph.D., Genentech’s chief medical officer and head of Global Product Development. “We welcome the FDA’s Priority Review designation for inavolisib, which underscores the urgency to bring this potential best-in-class treatment option to patients as quickly as possible.” The PIK3CA mutation is found in approximately 40% of HR-positive metastatic breast cancers. Early testing for mutations like PIK3CA prior to initiating first-line treatment can help identify people who may benefit from targeted therapy. Based on the Priority Review designation, the FDA has set a Prescription Drug User Fee Act date of November 27, 2024. Data from INAVO120 are also being used for filing submissions to other global health authorities, including the European Medicines Agency. Priority Review designation is granted to medicines that the FDA has determined to have the potential to provide significant improvements in the treatment, prevention or diagnosis of a disease. Genentech recently announced the inavolisib-based regimen has been granted FDA Breakthrough Therapy Designation based on INAVO120, the 29th for Genentech’s oncology portfolio. Additional analyses of INAVO120 will be presented in an oral abstract session at the 2024 American Society of Clinical Oncology Annual Meeting, taking place May 31 - June 4. Inavolisib is currently being investigated in three company-sponsored Phase III clinical studies (INAVO120, INAVO121, INAVO122) in PIK3CA-mutated locally advanced or metastatic breast cancer in various combinations. We continue to evaluate potential clinical development program expansion opportunities to address patient unmet needs in various tumor types across oncology. About inavolisib Inavolisib is an investigational, oral targeted treatment with best-in-class potential that could provide well-tolerated, durable disease control and potentially improved outcomes for people with PIK3CA-mutated, hormone receptor-positive, human epidermal growth factor receptor 2-negative, locally advanced or metastatic breast cancer, who often have a poor prognosis and are in urgent need of new treatment options. Inavolisib has been designed to help minimize the overall burden and toxicity of treatment and is differentiated from other PI3K inhibitors due to its high potency and specificity for the PI3K alpha isoform versus other isoforms, and unique mechanism of action that facilitates the degradation of mutated PI3K alpha. About the INAVO120 study The INAVO120 study [NCT04191499] is a Phase III, randomized, double-blind, placebo-controlled study evaluating the efficacy and safety of inavolisib in combination with palbociclib and fulvestrant versus placebo plus palbociclib and fulvestrant in people with PIK3CA-mutated, hormone receptor (HR)-positive, human epidermal growth factor receptor 2 (HER2)-negative, locally advanced or metastatic breast cancer whose disease progressed during treatment or within 12 months of completing adjuvant endocrine therapy and who have not received prior systemic therapy for metastatic disease. The study included 325 patients, who were randomly assigned to either the investigational or control treatment arm. The primary endpoint is progression-free survival, as assessed by investigators, defined as the time from randomization in the clinical trial to the time when the disease progresses, or a patient dies from any cause. Secondary endpoints include overall survival, objective response rate, and clinical benefit rate. Beyond INAVO120, inavolisib is currently being investigated in two additional company-sponsored Phase III clinical studies in PIK3CA-mutated locally advanced or metastatic breast cancer in various combinations: in combination with fulvestrant versus alpelisib plus fulvestrant in HR-positive/HER2-negative breast cancer post cyclin-dependent kinase 4/6 inhibitor and endocrine combination therapy (INAVO121; NCT05646862), and in combination with dual HER2 blockade versus dual HER2 blockade and optional physician's choice of endocrine therapy as a maintenance treatment in HER2-positive disease (INAVO122; NCT05894239). About Hormone Receptor-Positive Breast Cancer HR-positive breast cancer is the most prevalent type of all breast cancers, accounting for approximately 70% of cases. A defining feature of HR-positive breast cancer is that its tumor cells have receptors that attach to one or both hormones – estrogen or progesterone – which can contribute to tumor growth. People diagnosed with HR-positive metastatic breast cancer often face the risk of disease progression and treatment side effects, creating a need for additional treatment options. The PI3K signaling pathway is commonly dysregulated in HR-positive breast cancer, often due to activating PIK3CA mutations, which have been identified as a potential mechanism of intrinsic resistance to standard of care endocrine therapy in combination with cyclin-dependent kinase 4/6 inhibitors. About Genentech in Breast Cancer Genentech has been advancing breast cancer research for more than 30 years with the goal of helping as many people with the disease as possible. Our medicines, along with companion diagnostic tests, have contributed to bringing breakthrough outcomes in HER2-positive and triple-negative breast cancers. As our understanding of breast cancer biology rapidly improves, we are working to identify new biomarkers and approaches to treatment for other subtypes of the disease, including estrogen receptor-positive breast cancer, which is a form of hormone receptor-positive breast cancer, the most prevalent type of all breast cancers. About Genentech Founded more than 40 years ago, Genentech is a leading biotechnology company that discovers, develops, manufactures and commercializes medicines to treat patients with serious and life-threatening medical conditions. The company, a member of the Roche Group, has headquarters in South San Francisco, California. For additional information about the company, please visit . All trademarks used or mentioned in this release are protected by law. View source version on businesswire.com: Contacts Media Contact: Nicole Burkart, (650) 467-6800 Advocacy Contact: Lauren Davis, (510) 520-2673 Investor Contacts: Loren Kalm, (650) 225-3217 Bruno Eschli, +41616875284 Source: Genentech View this news release online at:

The designation is based on Phase III INAVO120 results, showing the inavolisib-based regimen more than doubled progression-free survival compared with palbociclib and fulvestrant alone in the first-line setting1Approximately 40% of people with HR-positive breast cancer have a PIK3CA mutation and often face poorer prognosis and resistance to endocrine treatment2,3 This is the 29th Breakthrough Therapy Designation for Roche’s oncology portfolio, a testament to our enduring ambition to deliver transformative medicines for patients4 Basel, 21 May 2024 - Roche (SIX: RO, ROG; OTCQX: RHHBY) announced today that the U.S. Food and Drug Administration (FDA) has granted Breakthrough Therapy Designation for inavolisib, an investigational oral therapy, in combination with palbociclib (Ibrance®) and fulvestrant, for the treatment of adult patients with PIK3CA-mutated, hormone receptor-positive, human epidermal growth factor receptor 2-negative, locally advanced or metastatic breast cancer, following recurrence on or within 12 months of completing adjuvant endocrine treatment. “We are pleased that the FDA granted Breakthrough Therapy Designation for inavolisib in recognition of the substantial clinical benefit observed with this regimen,” said Levi Garraway, M.D., Ph.D., Roche’s Chief Medical Officer and Head of Global Product Development. “This promising inavolisib-based regimen could transform the PI3K inhibitor class, potentially becoming the standard of care for this patient population in the first-line setting.” Breakthrough Therapy Designation is designed to accelerate the development and regulatory review of medicines intended to treat serious or life-threatening conditions where preliminary clinical evidence has indicated they may demonstrate substantial improvement over existing therapies.5 The FDA’s decision is based on positive Phase III INAVO120 results, which showed the inavolisib-based regimen reduced the risk of disease worsening or death (progression-free survival) by 57% compared to palbociclib and fulvestrant alone (15.0 months vs. 7.3 months; hazard ratio [HR]=0.43, 95% CI: 0.32-0.59, p<0.0001).1 Overall survival (OS) data were immature at this time, but a clear positive trend has been observed (stratified HR=0.64, 95% CI: 0.43-0.97, p=0.0338 (boundary of 0.0098).1 Follow-up for OS will continue to the next analysis. These data reinforce the potential for this inavolisib-based regimen to benefit patients with PIK3CA-mutated locally advanced or metastatic breast cancer.1 PIK3CA is one of the most commonly mutated genes in advanced or metastatic breast cancer.6 Despite the prevalence of PIK3CA mutations, many patients are not tested until later in their treatment journey.7 Early testing for PIK3CA prior to initiating first-line treatment helps clinicians make a personalised treatment decision.7,8 Data from INAVO120 are also being submitted to other global health authorities, including the European Medicines Agency. Inavolisib is currently being investigated in three company-sponsored Phase III clinical studies (INAVO120, INAVO121, INAVO122) in PIK3CA-mutated locally advanced or metastatic breast cancer in various combinations.9-11 We continue to evaluate potential clinical development programme expansion opportunities to address patient unmet needs in various tumour types across oncology. About inavolisibInavolisib is an investigational, oral targeted treatment with best-in-class potential that could provide well-tolerated, durable disease control and potentially improved outcomes for people with PIK3CA-mutated, hormone receptor-positive, human epidermal growth factor receptor 2-negative, locally advanced or metastatic breast cancer, who often have a poor prognosis and are in urgent need of new treatment options.1-3 Inavolisib has been designed to help minimise the overall burden and toxicity of treatment and is differentiated from other PI3K inhibitors due to its high potency and specificity for the PI3K alpha isoform versus other isoforms, and unique mechanism of action that facilitates the degradation of mutated PI3K alpha.12,13 About the INAVO120 studyThe INAVO120 study [NCT04191499] is a Phase III, randomised, double-blind, placebo-controlled study evaluating the efficacy and safety of inavolisib in combination with palbociclib and fulvestrant versus placebo plus palbociclib and fulvestrant in people with PIK3CA-mutated, hormone receptor (HR)-positive, human epidermal growth factor receptor 2 (HER2)-negative, locally advanced or metastatic breast cancer whose disease progressed during treatment or within 12 months of completing adjuvant endocrine therapy and who have not received prior systemic therapy for metastatic disease.9 The study included 325 patients, who were randomly assigned to either the investigational or control treatment arm.9 The primary endpoint is progression-free survival, as assessed by investigators, defined as the time from randomisation in the clinical trial to the time when the disease progresses, or a patient dies from any cause.9 Secondary endpoints include overall survival, objective response rate, and clinical benefit rate.9 Beyond INAVO120, inavolisib is currently being investigated in two additional company-sponsored Phase III clinical studies in PIK3CA-mutated locally advanced or metastatic breast cancer in various combinations: in combination with fulvestrant versus alpelisib plus fulvestrant in HR-positive/HER2-negative breast cancer post cyclin-dependent kinase 4/6 inhibitor and endocrine combination therapy (INAVO121; NCT05646862), andin combination with pertuzumab plus trastuzumab for subcutaneous injection (SC) versus pertuzumab plus trastuzumab for SC and optional physician's choice of endocrine therapy as a maintenance treatment in HER2-positive disease (INAVO122; NCT05894239).10,11 About hormone receptor (HR)-positive breast cancerHR-positive breast cancer is the most prevalent type of all breast cancers, accounting for approximately 70% of cases.14,15 A defining feature of HR-positive breast cancer is that its tumour cells have receptors that attach to one or both hormones – oestrogen or progesterone – which can contribute to tumour growth. People diagnosed with HR-positive metastatic breast cancer often face the risk of disease progression and treatment side effects, creating a need for additional treatment options.15-17 The PI3K signalling pathway is commonly dysregulated in HR-positive breast cancer, often due to activating PIK3CA mutations, which have been identified as a potential mechanism of intrinsic resistance to standard of care endocrine therapy in combination with cyclin-dependent kinase 4/6 inhibitors.3 About Roche in breast cancerRoche has been advancing breast cancer research for more than 30 years with the goal of helping as many people with the disease as possible. Our medicines, along with companion diagnostic tests, have contributed to bringing breakthrough outcomes in HER2-positive and triple-negative breast cancers. As our understanding of breast cancer biology rapidly improves, we are working to identify new biomarkers and approaches to treatment for other subtypes of the disease, including oestrogen receptor-positive breast cancer, which is a form of hormone receptor-positive breast cancer, the most prevalent type of all breast cancers.14 About Roche Founded in 1896 in Basel, Switzerland, as one of the first industrial manufacturers of branded medicines, Roche has grown into the world’s largest biotechnology company and the global leader in in-vitro diagnostics. The company pursues scientific excellence to discover and develop medicines and diagnostics for improving and saving the lives of people around the world. We are a pioneer in personalised healthcare and want to further transform how healthcare is delivered to have an even greater impact. To provide the best care for each person we partner with many stakeholders and combine our strengths in Diagnostics and Pharma with data insights from the clinical practice. In recognising our endeavour to pursue a long-term perspective in all we do, Roche has been named one of the most sustainable companies in the pharmaceuticals industry by the Dow Jones Sustainability Indices for the fifteenth consecutive year. This distinction also reflects our efforts to improve access to healthcare together with local partners in every country we work. Genentech, in the United States, is a wholly owned member of the Roche Group. Roche is the majority shareholder in Chugai Pharmaceutical, Japan. For more information, please visit www.roche.com. All trademarks used or mentioned in this release are protected by law.References[1] Jhaveri K, et al. Phase III study of inavolisib or placebo in combination with palbociclib and fulvestrant in patients with PIK3CA-mutant, hormone receptor-positive, HER2-negative locally advanced or metastatic breast cancer: INAVO120 primary analysis. Presented at San Antonio Breast Cancer Symposium, 2023 December 5-9; San Antonio, USA. Abstract #GS03-13.[2] Fillbrunn M, et al. PIK3CA mutation status, progression and survival in advanced HR+/HER2- breast cancer: a meta-analysis of published clinical trials. BMC Cancer. 2022;22:1002.[3] Anderson E, et al. A Systematic Review of the Prevalence and Diagnostic Workup of PIK3CA Mutations in HR+/HER2– Metastatic Breast Cancer. Int J Breast Cancer. 2020;2020:3759179.[4] U.S. Food and Drug Administration. Breakthrough Therapy Approvals [Internet; cited 2024 May]. Available from: https://www.fda.gov/drugs/nda-and-bla-approvals/breakthrough-therapy-approvals.[5] U.S. Food and Drug Administration. Breakthrough Therapy [Internet; cited 2024 May]. Available from: https://www.fda.gov/patients/fast-track-breakthrough-therapy-accelerated-approval-priority-review/breakthrough-therapy.[6] Miron A, et al. PIK3CA mutations in in situ and invasive breast carcinomas. Cancer Res. 2010;70(14):5674–8.[7] Princic N, et al. Abstract P1-18-18: PIK3CA mutation testing prevalence among post-menopausal (PM) women with hormone receptor positive and human epidermal growth factor receptor 2 negative (HR+/HER2-) metastatic breast cancer (mBC) using real world data. Cancer Res. 2020;80(4):P1-18-18. [8] Wales Cancer Network. PIK3CA-mutated breast cancer clinical guidance document [Internet; cited 2024 May]. Available from: https://executive.nhs.wales/functions/networks-and-planning/cancer/wcn-documents/mutated-breast-cancer-clinical-guidance-document//.[9] ClinicalTrials.gov. A Study Evaluating the Efficacy and Safety of Inavolisib + Palbociclib + Fulvestrant vs Placebo + Palbociclib + Fulvestrant in Patients With PIK3CA-Mutant, Hormone Receptor-Positive, Her2-Negative, Locally Advanced or Metastatic Breast Cancer (INAVO120) [Internet; cited 2024 May]. Available from: https://classic.clinicaltrials.gov/ct2/show/NCT04191499.[10] ClinicalTrials.gov. A Study Evaluating the Efficacy and Safety of Inavolisib Plus Fulvestrant Compared With Alpelisib Plus Fulvestrant in Participants With HR-Positive, HER2-Negative, PIK3CA Mutated, Locally Advanced or Metastatic Breast Cancer Post CDK4/6i and Endocrine Combination Therapy (INAVO121) [Internet; cited 2024 May]. Available from: https://classic.clinicaltrials.gov/ct2/show/NCT05646862.[11] ClinicalTrials.gov. A Study to Evaluate the Efficacy and Safety of Inavolisib in Combination With Phesgo Versus Placebo in Combination With Phesgo in Participants With PIK3CA-Mutated HER2-Positive Locally Advanced or Metastatic Breast Cancer [Internet; cited 2024 May]. Available from: https://classic.clinicaltrials.gov/ct2/show/NCT05894239.[12] Juric D, et al. A phase I/Ib study of inavolisib (GDC-0077) in combination with fulvestrant in patients (pts) with PIK3CA-mutated hormone receptor-positive/HER2-negative (HR+/HER2–) metastatic breast cancer. Presented at San Antonio Breast Cancer Symposium, 2020 December 7-10; San Antonio, USA. Abstract #P5-17-05.[13] Hong R, et al. GDC-0077 is a selective PI3K alpha inhibitor that demonstrates robust efficacy in PIK3CA mutant breast cancer models as a single agent and in combination with standard of care therapies. Cancer Res. 2018;78(4):4-14.[14] National Cancer Institute: Surveillance, Epidemiology and Ends Result Program. Cancer Stat Facts: Female Breast Cancer Subtypes [Internet; cited 2024 May]. Available from: https://seer.cancer.gov/statfacts/html/breast-subtypes.html.[15] Lim E, et al. The natural history of hormone receptor-positive breast cancer. Oncology (Williston Park). 2012;26(8):688-94,696.[16] Tomas R and Barrios CH. Optimal management of hormone receptor positive metastatic breast cancer in 2016. Ther Adv Med Oncol. 2015;7(6):304-20.[17] Galipeau N, et al. Understanding key symptoms, side effects, and impacts of HR+/HER- advanced breast cancer: qualitative study findings. J Patient-Rep Outcomes. 2019;3(1):10. Roche Global Media RelationsPhone: +41 61 688 8888 / e-mail: media.relations@roche.com Hans Trees, PhDPhone: +41 79 407 72 58Sileia UrechPhone: +41 79 935 81 48Nathalie AltermattPhone: +41 79 771 05 25Simon GoldsboroughPhone: +44 797 32 72 915Karsten KleinePhone: +41 79 461 86 83Nina MählitzPhone: +41 79 327 54 74Kirti PandeyPhone: +49 172 6367262Yvette PetillonPhone: +41 79 961 92 50 Dr. Rebekka SchnellPhone: +41 79 205 27 03 Roche Investor Relations Dr. Bruno Eschli Phone: +41 61 68-75284 e-mail: bruno.eschli@roche.comDr. Sabine BorngräberPhone: +41 61 68-88027 e-mail: sabine.borngraeber@roche.comDr. Birgit MasjostPhone: +41 61 68-84814e-mail: birgit.masjost@roche.com Investor Relations North America Loren KalmPhone: +1 650 225 3217 e-mail: kalm.loren@gene.com Attachment 21052024_MR_FDA_BTD_inavolisib_en