SKYSCRAPER-02, the first randomized study of tiragolumab in extensive-stage small cell lung cancer (ES-SCLC), did not meet its co-primary endpoint of progression-free survival

ES-SCLC is a hard-to-treat disease and Tecentriq plus chemotherapy remains a standard of care

Tiragolumab continues to be evaluated in non-small cell lung cancer and other cancer types through additional Phase III trials as planned

SOUTH SAN FRANCISCO, CA, USA I March 29, 2022 I Genentech, a member of the Roche Group (SIX: RO, ROG; OTCQX: RHHBY), today announced that the Phase III SKYSCRAPER-02 study, evaluating the investigational anti-TIGIT immunotherapy tiragolumab plus Tecentriq® (atezolizumab) and chemotherapy (carboplatin and etoposide) as an initial (first-line) treatment for people with extensive-stage small cell lung cancer (ES-SCLC), did not meet its co-primary endpoint of progression-free survival. The co-primary endpoint of overall survival was not met at its interim analysis and is unlikely to reach statistical significance at the planned final analysis. Data suggest tiragolumab plus Tecentriq and chemotherapy was well-tolerated and no new safety signals were identified when adding tiragolumab. Data will be presented at an upcoming medical meeting.

“Today’s outcome is disappointing as we had hoped to continue building on the advances of Tecentriq in extensive stage small-cell lung cancer, which remains difficult to treat. We are thankful to all the patients and healthcare professionals involved in the study,” said Levi Garraway, M.D., Ph.D., chief medical officer and head of Global Product Development. “We look forward to seeing additional data from the upcoming Phase III trial in PD-L1-high non-small cell lung cancer based on the encouraging results from the CITYSCAPE study.”

SCLC is the most aggressive form of any lung cancer and is characterized by rapid progression and poor survival. Tecentriq was the first cancer immunotherapy to show a survival benefit in ES-SCLC (Phase III IMpower133 study), and was the first approved treatment option in 20 years. More options are needed, particularly for hard-to-treat cancers like SCLC, and Genentech is committed to exploring innovative medicines to improve outcomes for people with lung cancer.

The tiragolumab program continues to explore advances in multiple clinical trials to build on Tecentriq, expand into earlier stages of disease, and seeks to provide new treatment options in advanced and difficult-to-treat cancers with high unmet medical need. Tiragolumab was granted Breakthrough Therapy Designation by the U.S. Food and Drug Administration in 2021 for the initial treatment of PD-L1-high metastatic non-small cell lung cancer, based on the results of the Phase II CITYSCAPE study – representing the only investigational anti-TIGIT therapy to be granted this designation. The Phase III SKYSCRAPER-01 trial is currently ongoing to confirm the CITYSCAPE results. Since 2020, Genentech has initiated five Phase III trials, including NSCLC (SKYSCRAPER-01, SKYSCRAPER-03), ES-SCLC (SKYSCRAPER-02), esophageal cancers (SKYSCRAPER-07, SKYSCRAPER-08), and multiple early trials in various tumor types.

About the SKYSCRAPER-02 study
SKYSCRAPER-02 is a global Phase III, randomized, placebo-controlled and double-blinded study evaluating tiragolumab plus Tecentriq® (atezolizumab) and chemotherapy as an initial (first-line) treatment versus Tecentriq and chemotherapy alone in 490 people with extensive-stage small cell lung cancer. Co-primary endpoints are overall survival (OS) and progression-free survival (PFS) in the primary analysis set (all randomized patients whose cancer had not spread to the brain). Key secondary endpoints include OS and PFS in all randomized patients, and safety.

About tiragolumab
Tiragolumab is a novel immune checkpoint inhibitor with an intact Fc region. Tiragolumab selectively binds to TIGIT, a novel inhibitory immune checkpoint, which suppresses the immune response to cancer. Based on preclinical research, tiragolumab is thought to work as an immune amplifier with other cancer immunotherapies such as Tecentriq® (atezolizumab). The TIGIT pathway is distinct but complementary to the PD-L1/PD-1 pathway. Dual blockade with tiragolumab and Tecentriq may help overcome immune suppression and restore the immune response.

About Tecentriq® (atezolizumab)
Tecentriq is a monoclonal antibody designed to bind with a protein called PD-L1. Tecentriq is designed to bind to PD-L1 expressed on tumor cells and tumor-infiltrating immune cells, blocking its interactions with both PD-1 and B7.1 receptors. By inhibiting PD-L1, Tecentriq may enable the re-activation of T cells. Tecentriq may also affect normal cells.

Tecentriq U.S. Indications
Tecentriq is a prescription medicine used to treat adults with:
A type of lung cancer called small cell lung cancer (SCLC). TECENTRIQ may be used with the chemotherapy medicines carboplatin and etoposide as your first treatment when your lung cancer:

  • TECENTRIQ may be used alone as a treatment for their lung cancer:
    • is a type called “extensive-stage small cell lung cancer,” which means that it has spread or grown.

It is not known if Tecentriq is safe and effective in children.

Please see the Tecentriq full Prescribing Information, including the Medication Guide, for additional Important Safety Information.

About Genentech in cancer immunotherapy
Genentech has been developing medicines to redefine treatment in oncology for more than 35 years, and today, realizing the full potential of cancer immunotherapy is a major area of focus. With more than 20 immunotherapy molecules in development, Genentech is investigating the potential benefits of immunotherapy alone, and in combination with various chemotherapies, targeted therapies and other immunotherapies with the goal of providing each person with a treatment tailored to harness their own unique immune system.

In addition to Genentech’s approved PD-L1 checkpoint inhibitor, the company’s broad cancer immunotherapy pipeline includes other checkpoint inhibitors, individualized neoantigen therapies and T cell bispecific antibodies. For more information visit

About Genentech in lung cancer
Lung cancer is a major area of focus and investment for Genentech, and we are committed to developing new approaches, medicines and tests that can help people with this deadly disease. Our goal is to provide an effective treatment option for every person diagnosed with lung cancer. We currently have five approved medicines to treat certain kinds of lung cancer and more than 10 medicines being developed to target the most common genetic drivers of lung cancer or to boost the immune system to combat the disease.

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

SOURCE: Genentech