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Gocatamig

Phase 1

Small Cell Lung Cancer | Monoclonal antibody | Oncology |Merck & Company, Inc.|Last Updated: Aug 28, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedCONTROLLED
Total Trials1
Total Enrollment327

FDA Designations

No designations recorded

Clinical trial landscape

Gocatamig · 3 trials · 4 indications

Phase 1 3
NCT07227597A Clinical Study of Gocatamig (MK-6070) and Infinatamab Deruxtecan (MK-2400) in People With Small Cell Lung Cancer (MK-6070-003)Small Cell Lung Cancer Extensive Stage
RECRUITING170 Analytics
NCT06780137A Study to Evaluate the Safety and Efficacy of Gocatamig (MK-6070) and Ifinatamab Deruxtecan (I-DXd) in Participants With Relapsed/Refractory Extensive-Stage Small Cell Lung Cancer (MK-6070-002)Small Cell Lung Cancer
RECRUITING327 Analytics
NCT04471727A Study in Participants With Advanced Cancers Associated With Expression of DLL3 (MK-6070-001/HPN328-4001)Small-Cell Lung Cancer
ACTIVE NOT_RECRUITING232 Analytics
PHASE1RECRUITING
A Clinical Study of Gocatamig (MK-6070) and Infinatamab Deruxtecan (MK-2400) in People With Small Cell Lung Cancer (MK-6070-003)
Small Cell Lung Cancer Extensive StageUnlock trial analytics
PHASE1RECRUITING
A Study to Evaluate the Safety and Efficacy of Gocatamig (MK-6070) and Ifinatamab Deruxtecan (I-DXd) in Participants With Relapsed/Refractory Extensive-Stage Small Cell Lung Cancer (MK-6070-002)
Small Cell Lung CancerUnlock trial analytics
PHASE1ACTIVE NOT_RECRUITING
A Study in Participants With Advanced Cancers Associated With Expression of DLL3 (MK-6070-001/HPN328-4001)
Small-Cell Lung CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants Who Experience an Adverse Event (AE)
Up to approximately 58 months

An AE is defined as any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. The number of participants who experience an AE will be reported.

Number of Participants Who Experience One or More Dose-Limiting Toxicities (DLTs)
Up to approximately 21 days

DLT will be defined as any drug-related AE observed during the DLT evaluation period (up to 21 days) that meets the protocol-specified DLT criteria. The number of participants who experience at least one DLT will be presented.

Number of Participants Who Discontinue Study Intervention Due to an AE
Up to approximately 58 months

An AE is defined as any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. The number of participants who discontinue study intervention due to an AE will be reported.

Objective Response Rate (ORR)
Up to approximately 58 months

ORR is defined as the percentage of participants with Complete Response (CR: disappearance of all target lesions) or Partial Response (PR: at least a 30% decrease in the sum of diameters of target lesions) per Response Evaluation Criteria In Solid Tumors Version 1.1 (RECIST 1.1). The percentage of participants who experience CR or PR as assessed by Blinded Independent Central Review (BICR) will be presented.

Part 1: Objective Response Rate (ORR)
Up to approximately 44 months

ORR is defined as the percentage of participants with Complete Response (CR: disappearance of all target lesions) or Partial Response (PR: at least a 30% decrease in the sum of diameters of target lesions) per Response Evaluation Criteria In Solid Tumors Version 1.1 (RECIST 1.1). The percentage of participants who experience CR or PR as assessed by the investigator will be presented.

Percentage of participants who experience an adverse event
Up to ~4 years

An AE is any unfavorable and unintended sign, symptom, or disease temporally associated with the use of a medicinal product or protocol-specified procedure, whether or not considered related to the medicinal product or protocol-specified procedure. Any worsening of a preexisting condition that is temporally associated with the use of the Sponsor's product, is also an AE. AEs will be graded according to National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTACAE) version 5.0 (American Society for Transplant and Cellular Therapy (ASTCT) grading criteria for cytokine release syndrome (CRS) and immune effector cell-associated neurotoxicity syndrome (ICANS)). The percentage of participants who experience an AE in the study will be presented.

Percentage of participants who discontinue due to an adverse event
Up to ~4 years

An AE is any unfavorable and unintended sign, symptom, or disease temporally associated with the use of a medicinal product or protocol-specified procedure, whether or not considered related to the medicinal product or protocol-specified procedure. Any worsening of a preexisting condition that is temporally associated with the use of the Sponsor's product, is also an AE. AEs will be graded according to NCI CTACAE version 5.0 (ASTCT grading criteria for CRS and ICANS). The percentage of participants who discontinue due to an AE in the study will be presented.

Number of participants with dose limiting toxicity (DLT) following treatment with HPN328 as monotherapy or in combination with atezolizumab or I-DXd
Up to ~4 years

A DLT is defined as an AE that represents a clinically significant shift from baseline and must be considered related or suspected to be related to study drug (gocatamig and/or atezolizumab or I-DXd) by the Investigator or Sponsor. AEs will be graded according to NCI CTACAE version 5.0 (ASTCT grading criteria for CRS and ICANS). The number of participants with a DLT will be presented.

Maximum concentration (Cmax) of Gocatamig
At designated time points up to ~4 years

Cmax is the maximum concentration of the drug observed in serum. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine Cmax of gocatamig.

Cmax of Atezolizumab
At designated time points up to ~4 years

Cmax is the maximum concentration of the drug observed in serum. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine Cmax of Atezolizumab.

Cmax of I-DXd
At designated time points up to ~4 years

Cmax is the maximum concentration of the drug observed in plasma. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine Cmax of I-DXd.

Time to maximum concentration (Tmax) of Gocatamig
At designated time points up to ~4 years

Tmax is the amount of time that a drug is present at the maximum concentration observed in serum. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine the Tmax of gocatamig.

Tmax of atezolizumab
At designated time points up to ~4 years

Tmax is the amount of time that a drug is present at the maximum concentration observed in serum. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine the Tmax of atezolizumab.

Tmax of I-DXd
At designated time points up to ~4 years

Tmax is the amount of time that a drug is present at the maximum concentration observed in plasma. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine the Tmax of I-DXd.

Area under the concentration-time curve over the dosing interval t (AUCt) of Gocatamig
At designated time points up to ~4 years

AUC is a measure of serum drug concentration and time and is estimated as the area under the plot of serum concentration against time after drug administration. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine t (AUCt) of gocatamig.

AUCt of atezolizumab
At designated time points up to ~4 years

AUC is a measure of serum drug concentration and time and is estimated as the area under the plot of serum concentration against time after drug administration. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine t (AUCt) of atezolizumab.

AUCt of I-DXd
At designated time points up to ~4 years

AUC is a measure of plasma drug concentration and time and is estimated as the area under the plot of plasma concentration against time after drug administration. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine t (AUCt) of I-DXd.

Area under the concentration-time curve extrapolated to infinity (AUCinf) of Gocatamig
At designated time points up to ~4 years

AUCinf is a measure of serum drug concentration and time to infinity and is estimated as the area under the plot of serum concentration against time to infinity after drug administration. Blood samples collected at multiple timepoints post-dose will be used to determine the AUCinf of gocatamig.

AUCinf of atezolizumab
At designated time points up to ~4 years

AUCinf is a measure of serum drug concentration and time to infinity and is estimated as the area under the plot of serum concentration against time to infinity after drug administration. Blood samples collected at multiple timepoints post-dose will be used to determine the AUCinf of atezolizumab.

AUCinf of I-DXd
At designated time points up to ~4 years

AUCinf is a measure of plasma drug concentration and time to infinity and is estimated as the area under the plot of plasma concentration against time to infinity after drug administration. Blood samples collected at multiple timepoints post-dose will be used to determine the AUCinf of I-DXd.

Terminal half-life (t1/2) of Gocatamig
At designated time points up to ~4 years

t1/2 is a measure of how long it takes to clear 50% of the drug from serum after reaching Cmax. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine the t1/2 of gocatamig.

t1/2 of atezolizumab
At designated time points up to ~4 years

t1/2 is a measure of how long it takes to clear 50% of the drug from serum after reaching Cmax. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine the t1/2 of atezolizumab.

t1/2 of I-DXd
At designated time points up to ~4 years

t1/2 is a measure of how long it takes to clear 50% of the drug from plasma after reaching Cmax. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine the t1/2 of I-DXd.

Single dose clearance (CL) of Gocatamig
At designated time points up to ~4 years

CL is the apparent total clearance of the drug from serum after oral administration. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine CL of gocatamig.

CL of atezolizumab
At designated time points up to ~4 years

CL is the apparent total clearance of the drug from serum after oral administration. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine CL of atezolizumab.

CL of I-DXd
At designated time points up to ~4 years

CL is the apparent total clearance of the drug from plasma after oral administration. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine CL of I-DXd.

Steady state maximum concentration (Cmax,ss) of Gocatamig
At designated time points up to ~4 years

Cmax,ss is the maximum concentration of the drug in serum observed in serum under steady state conditions. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine Cmax,ss of gocatamig.

Cmax,ss of atezolizumab
At designated time points up to ~4 years

Cmax,ss is the maximum concentration of the drug observed in serum under steady state conditions. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine Css,max of atezolizumab.

Cmax,ss of I-DXd
At designated time points up to ~4 years

Cmax,ss is the maximum concentration of the drug observed in plasma under steady state conditions. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine Cmax,ss of I-DXd.

Steady state Ctrough (Ctrough,ss) of Gocatamig
At designated time points up to ~4 years

Ctrough,ss is the lowest concentration reached by a drug in serum under steady state conditions before the next dose is administered. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine Ctrough,ss of gocatamig.

Ctrough,ss of atezolizumab
At designated time points up to ~4 years

Ctrough,ss is the lowest concentration reached by a drug in serum under steady state conditions before the next dose is administered. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine Ctrough,ss of atezolizumab.

Ctrough,ss of I-DXd
At designated time points up to ~4 years

Ctrough,ss is the lowest concentration reached by a drug in plasma under steady state conditions before the next dose is administered. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine Ctrough,ss of I-DXd.

Steady state time to maximum concentration (Tmax,ss) of Gocatamig
At designated time points up to ~4 years

Tmax,ss is the amount of time that a drug is present at the maximum concentration observed in serum under steady state conditions. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine the Tmax,ss of gocatamig.

Tmax,ss of atezolizumab
At designated time points up to ~4 years

Tmax,ss is the amount of time that a drug is present at the maximum concentration observed in serum under steady state conditions. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine the Tmax,ss of atezolizumab.

Tmax,ss of I-DXd
At designated time points up to ~4 years

Tmax,ss is the amount of time that a drug is present at the maximum concentration observed in plasma under steady state conditions. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine the Tmax,ss of I-DXd.

Area under the steady state concentration-time curve over dosing interval t (AUCt,ss) of Gocatamig
At designated time points up to ~4 years

AUCt,ss is a measure of serum drug concentration and time and is estimated as the area under the plot of serum concentration against time after drug administration under steady state conditions. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine AUCt,ss of gocatamig.

AUCt,ss of atezolizumab
At designated time points up to ~4 years

AUCt,ss is a measure of serum drug concentration and time and is estimated as the area under the plot of serum concentration against time after drug administration under steady state conditions. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine AUCt,ss of atezolizumab.

AUCt,ss of I-DXd
At designated time points up to ~4 years

AUCt,ss is a measure of plasma drug concentration and time and is estimated as the area under the plot of plasma concentration against time after drug administration under steady state conditions. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine AUCt,ss of I-DXd.

Steady state t1/2 (t1/2,ss) of Gocatamig
At designated time points up to ~4 years

t1/2,ss is a measure of how long it takes to clear 50% of the drug in serum after reaching Cmax under steady state conditions. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine the t1/2,ss of gocatamig.

t1/2,ss of Gocatamig with atezolizumab
At designated time points up to ~4 years

t1/2,ss is a measure of how long it takes to clear 50% of the drug after reaching Cmax under steady state conditions. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine the t1/2,ss of atezolizumab.

t1/2,ss of IDXd
At designated time points up to ~4 years

t1/2,ss is a measure of how long it takes to clear 50% of the drug in plasma after reaching Cmax under steady state conditions. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine the t1/2,ss of I-DXd.

Steady state CL (CL,ss) of Gocatamig
At designated time points up to ~4 years

CL,ss is the apparent total clearance of the drug from serum after administration under steady state conditions. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine CL,ss of gocatamig.

CL,ss of Gocatamig with atezolizumab
At designated time points up to ~4 years

CL,ss is the apparent total clearance of the drug from serum after administration under steady state conditions. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine CL,ss of atezolizumab.

CL,ss of I-DXd
At designated time points up to ~4 years

CL,ss is the apparent total clearance of the drug from plasma after administration under steady state conditions. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine CL,ss of I-DXd.

Steady state volume of distribution (V,ss) of Gocatamig
At designated time points up to ~4 years

V,ss is defined as the volume of distribution in serum under steady state conditions. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine the V,ss of gocatamig.

V,ss of atezolizumab
At designated time points up to ~4 years

V,ss is defined as the volume of distribution in serum under steady state conditions. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine the V,ss of atezolizumab.

V,ss of I-DXd
At designated time points up to ~4 years

V,ss is defined as the volume of distribution in plasma under steady state conditions. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine the V,ss of I-DXd.

Steady state accumulation ratio (AC) of Gocatamig
At designated time points up to ~4 years

AC is the ratio of accumulation of a drug in serum under steady state conditions after repeated administration as compared to a single dose. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine AC of gocatamig.

AC of atezolizumab
At designated time points up to ~4 years

AC is the ratio of accumulation of a drug in serum under steady state conditions after repeated administration as compared to a single dose. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine AC of atezolizumab.

AC of I-DXd
At designated time points up to ~4 years

AC is the ratio of accumulation of a drug in plasma under steady state conditions after repeated administration as compared to a single dose. Blood samples collected pre dose and at multiple timepoints post dose will be used to determine AC of I-DXd.

Secondary Endpoints

Disease Control Rate (DCR)
Up to approximately 58 months
Duration of Response (DOR)
Up to approximately 58 months
Progression-Free Survival (PFS)
Up to approximately 58 months
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Arm 1, Parts A and B: Gocataming + I-DXdEXPERIMENTALParticipants who completed standard of care (SOC) induction chemotherapy with concurrent approved anti-programmed cell death 1/ligand 1 protein (anti-PD-1/L1) treatment for ES-SCLC and did not have disease progression per investigator discretion, will receive gocatamig and I-DXd in the maintenance phase, until documented disease progression or meeting other study discontinuation criteria.
Arm 2, Parts A and B: Gocataming + I-DXdEXPERIMENTALParticipants who did not receive prior systemic treatment for ES-SCLC will receive gocatamig and I-DXd during induction and maintenance phases, until documented disease progression or meeting other study discontinuation criteria.
Arm 3, Part B: Gocataming + I-DXd → gocatamig + atezolizumabEXPERIMENTALParticipants who did not receive prior systemic treatment for ES-SCLC will receive gocatamig and I-DXd in the induction phase, followed by gocatamig and atezolizumab in the maintenance phase, until documented disease progression or meeting other study discontinuation criteria.
Arm 4, Part B: Carboplatin + etoposide + atezolizumab → atezolizumabACTIVE_COMPARATORParticipants who did not receive prior systemic treatment for ES-SCLC will receive SOC (carboplatin + etoposide + atezolizumab) in the induction phase, followed by atezolizumab in the maintenance phase, until documented disease progression or meeting other study discontinuation criteria.
Part 1 Arm 1: Gocatamig and I-DXdEXPERIMENTALParticipants will receive gocatamig and I-DXd at a determined dose until documented disease progression or discontinuation criteria are met.
Part 1 Arm 2: Gocatamig and I-DXdEXPERIMENTALParticipants will receive gocatamig and I-DXd at a determined dose until documented disease progression or discontinuation criteria are met.
Part 1 Arm 3a: I-DXd MonotherapyEXPERIMENTALParticipants will receive I-DXd until documented disease progression or discontinuation criteria are met.
Part 1 Arm 3b: Gocatamig and I-DXdEXPERIMENTALParticipants will receive gocatamig and I-DXd at a determined dose until documented disease progression or discontinuation criteria are met.
Part 2 Arm 4: Gocatamig Monotherapy in JapanEXPERIMENTALParticipants in Japan will receive escalating doses of gocatamig until documented disease progression or discontinuation criteria are met.
Part 2 Arm 5: Gocatamig Monotherapy in ChinaEXPERIMENTALParticipants in China will receive escalating doses of gocatamig until documented disease progression or discontinuation criteria are met.
Part 2 Arm 6: GocatamigEXPERIMENTALParticipants will receive gocatamig at a determined dose until documented disease progression or discontinuation criteria are met.
Part 3 Arm 7: Gocatamig and DurvalumabEXPERIMENTALParticipants will receive gocatamig and durvalumab at a determined dose until documented disease progression or discontinuation criteria are met.
Part 2 Arm 8: Gocatamig (Alternate Presentation)EXPERIMENTALParticipants will receive an alternate presentation of gocatamig at a determined dose until documented disease progression or discontinuation criteria are met.
Gocatamig monotherapy dose escalation with 1 week dosing intervalEXPERIMENTALParticipants will receive gocatamig once weekly (Q1W) via intravenous (IV) infusion during each 21-day cycle. Dose escalation may continue until one or more RDEs are identified, participant discontinuation or the Sponsor decides to stop enrollment.
Gocatamig monotherapy dose escalation with 2 week dosing intervalEXPERIMENTALParticipants will receive gocatamig via IV infusion once every 2 weeks (Q2W) of a 28-day cycle. Dose escalation may continue until one or more RDEs are identified, participant discontinuation, or the Sponsor decides to stop enrollment.
Gocatamig monotherapy dose escalation with 3 week dosing intervalEXPERIMENTALParticipants will receive gocatamig via IV infusion once every 3 weeks (Q3W) of a 21-day cycle. Dose escalation may continue until one or more RDEs are identified, participant discontinuation, or the Sponsor decides to stop enrollment.
Gocatamig dose escalation with atezolizumabEXPERIMENTALSmall cell lung cancer (SCLC) participants will receive gocatamig via IV infusion Q2W during each 28-day cycle and Atezolizumab via IV infusion every 4 weeks (Q4W) on Day 1 of each 28-day cycle. Dose escalation may continue until one or more RDEs are identified, participant discontinuation, or the Sponsor decides to stop enrollment.
Gocatamig dose escalation in combination with I-DXdEXPERIMENTALSCLC participants will receive gocatamig via IV infusion Q2W during each 42-day cycle and I-DXd via IV infusion Q3W on Day 1 and Day 22 of each 42-day cycle. Dose escalation may continue until one or more RDEs are identified, participant discontinuation, or the Sponsor decides to stop enrollment.

Interventions

NameTypeDescription
GocatamigDRUGIntravenous (IV) administration
I-DXdDRUGIV administration
AtezolizumabDRUGIV administration
CarboplatinDRUGIV administration
EtoposideDRUGIV administration
Rescue MedicationsDRUGParticipants will receive rescue medications at the investigator's discretion. Recommended rescue medications include tocilizumab for treatment of cytokine release syndrome (CRS); dexamethasone, acetaminophen, and diphenhydramine for CRS/infusion-related reaction (IRR) prophylaxis; and 5-hydroxytryptamine 3 (5-HT3) receptor antagonist, neurokinin 1 (NK-1) receptor antagonist, and corticosteroid for prevention of nausea and vomiting.
Ifinatamab Deruxtecan (I-DXd)BIOLOGICALIV infusion
DurvalumabBIOLOGICALIV infusion
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites52

Inclusion Criteria: The main inclusion criteria include but are not limited to the following: * Has a histologically or cytologically confirmed diagnosis of extensive-stage small cell lung cancer (ES-SCLC) * For participants receiving gocatamig + ifinatamab deruxtecan (I-DXd) in maintenance only: ...

Countries:United StatesArgentinaChileChinaGermanyGreeceIsraelItalyPolandSouth KoreaSpainThailandAustraliaJapanTaiwanTurkey (Türkiye)United Kingdom
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Competitive Landscape -Non-Small Cell Lung Cancer 389 trials (matched to "Small Cell Lung Cancer")

Recent Changes (Last 90 Days)

LOWAug 28, 2026NCT06780137lastUpdatePostDate: changed
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LOWAug 21, 2026NCT07227597lastUpdatePostDate: changed
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LOWJul 6, 2026NCT06780137Enrollment: 262 → 327
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LOWJul 6, 2026NCT06780137Enrollment: 262 → 327
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Frequently asked questions about Gocatamig

What is Gocatamig used for?

Gocatamig is an investigational monoclonal antibody being studied for the treatment of small-cell lung cancer, including extensive-stage small cell lung cancer. It is currently in Phase 1 clinical development and has not been approved by regulatory authorities.

Who makes Gocatamig?

Gocatamig is being developed by Merck & Company, Inc., which trades under the ticker symbol MRK. The company is conducting clinical trials to evaluate the drug's safety and efficacy in patients with small-cell lung cancer.

What phase is Gocatamig in?

Gocatamig is in Phase 1 clinical development. It is an investigational drug and has not received regulatory approval. Multiple Phase 1 trials are ongoing to assess its safety and efficacy in small-cell lung cancer.

What clinical trials is Gocatamig in?

Gocatamig is being evaluated in several Phase 1 trials. NCT04471727 is a study in advanced cancers associated with DLL3 expression. NCT06780137 and NCT07227597 evaluate Gocatamig in combination with ifinatamab deruxtecan in relapsed/refractory extensive-stage small cell lung cancer.

Is Gocatamig the same as MK-6070?

Yes, Gocatamig is also known as MK-6070. Clinical trial records refer to the drug by both names, with studies titled using MK-6070 and the drug name Gocatamig used interchangeably in trial descriptions.