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Tiragolumab and Atezolizumab

Phase 2

PD-L1-selected Solid Tumors | Small molecule | Oncology |Roche Holding AG|Last Updated: Jun 18, 2026

Target and mechanism

Molecular targetTIGIT
Target classInhibitor
ModalitySmall molecule

Also known as Tiragolumab

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials1
Total Enrollment64

FDA Designations

No designations recorded

Clinical trial landscape

Tiragolumab and Atezolizumab · 1 trial · 1 indication

Phase 2 1
NCT05661578A Study to Evaluate the Safety and Pharmacokinetics of the Intravenous Fixed-Dose Combination (IV FDC) of Tiragolumab and Atezolizumab in Participants With Locally Advanced, Recurrent or Metastatic Solid TumorsPD-L1-selected Solid Tumors
COMPLETED64 Analytics
PHASE2COMPLETED
A Study to Evaluate the Safety and Pharmacokinetics of the Intravenous Fixed-Dose Combination (IV FDC) of Tiragolumab and Atezolizumab in Participants With Locally Advanced, Recurrent or Metastatic Solid Tumors
PD-L1-selected Solid TumorsUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants With Adverse Events (AEs)
Up to approximately 30.5 months

An AE was defined as any untoward medical occurrence in a participant or clinical study participant temporally associated with the use of a study treatment, whether or not considered related to the study treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of the study intervention.

Secondary Endpoints

Area Under the Concentration-time Curve From 0 to 21 Days (AUC0-21d) of Tiragolumab at Cycle 1
Up to Day 21 of Cycle 1 (1 cycle=21 days)
Area Under the Serum Concentration Curve From Time Zero Extrapolated to Infinity (AUC0-inf) of Tiragolumab at Cycle 1
30 minutes post-dose on Day 1 of Cycle 1 (1 cycle=21 days)
AUC0-21d of Atezolizumab at Cycle 1
Up to Day 21 of Cycle 1 (1 cycle=21 days)
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Tiragolumab and Atezolizumab IV FDCEXPERIMENTALParticipants will receive tiragolumab and atezolizumab as an intravenous fixed dose combination (IV FDC) on Day 1 of each 21-day cycle until disease progression, loss of clinical benefit or unacceptable toxicity.

Interventions

NameTypeDescription
Tiragolumab and Atezolizumab IV FDCDRUGIntravenous fixed dose combination (IV FDC) of tiragolumab 600 mg and atezolizumab 1200 mg once every 3 weeks (Q3W).
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites32

Inclusion Criteria: * Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 or 1 * Life expectancy \>=12 weeks * Adequate hematologic and end organ function * Recovery (i.e., improvement to Grade 1 or better) from all acute toxicities from previous therapy, excluding alopecia * For fema...

Countries:United StatesChinaCroatiaGreeceSerbiaSouth KoreaSpainTaiwanTurkey (Türkiye)
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Frequently asked questions about Tiragolumab and Atezolizumab

What is Tiragolumab used for?

Tiragolumab is an investigational antibody being studied in oncology for several cancers, including esophageal squamous cell carcinoma, small cell lung carcinoma, metastatic breast cancer, triple-negative breast cancer, PD-L1-selected solid tumors, and non-small cell lung cancer (NSCLC). It is in Phase 2 clinical development for these indications.

What does Tiragolumab target?

Tiragolumab is a monoclonal antibody (a -mab class drug) that targets a pathway involved in cancer immunity. It is being studied in combination with other therapies, such as atezolizumab, in clinical trials for various solid tumors.

Who makes Tiragolumab?

Tiragolumab is being developed by Roche Holding AG, which trades under the ticker RHHBY. The company is conducting clinical trials to evaluate the drug's safety and efficacy in multiple cancer types.

What phase is Tiragolumab in?

Tiragolumab is in Phase 2 clinical development. It is an investigational drug and has not been approved by regulatory authorities. Clinical trials are ongoing or completed to assess its use in various oncology indications.

What clinical trials is Tiragolumab in?

Tiragolumab has been studied in several trials, including NCT04300647, a Phase 2 study in cervical cancer; NCT04665856, a Phase 3 study in small cell lung cancer; NCT05661578, a Phase 2 study in solid tumors; and NCT06342037, a Phase 2 study in triple-negative breast cancer.

Is Tiragolumab the same as atezolizumab?

No, Tiragolumab is not the same as atezolizumab. Tiragolumab is a separate investigational antibody that is often studied in combination with atezolizumab, as seen in trials like NCT04300647 and NCT04665856, where the two drugs are given together.