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Metastatic Colorectal CancerPhase 2NCT07503756

JS212 Combination Therapies in Metastatic Colorectal Cancer

A Phase 2 study testing JS212, Capecitabine and Bevacizumab in people with Metastatic Colorectal Cancer, run by Shanghai Junshi Bioscience Co., Ltd. at 1 site in China.

Recruiting

Looking for participants now. Contact the study team or a site below to ask about taking part.

Sites and contacts
Official record
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Trial summary

This is an open-label, multicenter Phase 2 clinical study designed to evaluate the safety, tolerability, pharmacokinetics, and preliminary efficacy of JS212-based combination therapies in patients with metastatic colorectal cancer (mCRC). Read more about this study

Who is it for?
Ages 18 to 75 years
Conditions the study is for
Metastatic Colorectal Cancer
What is being tested?
JS212, Capecitabine and Bevacizumab
Could I receive a placebo?
No, everyone receives an active treatment
How many people
80 participants
Where
1 siteChina
Study dates
25 Apr 2026to 30 Mar 2028
Phase
Phase 2
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 75 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • 1Participants must meet the following key criteria
  • Adults aged 18-75 years with histologically confirmed metastatic colorectal adenocarcinoma
  • Microsatellite stable (MSS) or mismatch repair proficient (pMMR) disease
  • No prior systemic therapy for advanced or metastatic disease
  • At least one measurable lesion according to RECIST v1.1
  • ECOG performance status 0-1
Show all 10Show fewer
  • Adequate hematologic, hepatic, renal, and coagulation function
  • Life expectancy ≥12 weeks
  • Willingness to provide tumor tissue samples for biomarker analyses
  • Ability to provide written informed consent

Who cannot join

  • Participants meeting any of the following criteria will be excluded
  • Prior treatment with EGFR- or HER3-targeted antibody-drug conjugates or topoisomerase I inhibitor-based ADCs
  • Recent major surgery, radiotherapy, or systemic anticancer therapy prior to study treatment
  • Active or uncontrolled infections or significant cardiovascular disease
  • Known active central nervous system metastases
  • History of autoimmune disease requiring systemic therapy
Show all 9Show fewer
  • Significant bleeding disorders or high risk of hemorrhage
  • Active viral infections such as uncontrolled hepatitis B, hepatitis C, or HIV
  • Any other serious medical or psychiatric condition that may interfere with study participation

Trial locations and contacts

1 site in 1 country. Contact the study team or a site near you to ask about taking part.

China1 site, 1 recruiting
  • Shanghai East Hospital

    Shanghai, Shanghai Municipality, 200123

    Yong Gao, Ph.D, 86 21-38804518, drgaoyong@163.com

    Yong Gao, Ph.D

    Recruiting

Other trials in China

About this study

Official title: An Open-label, Multicenter Phase 2 Clinical Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Preliminary Efficacy of JS212 Combination Therapies in Patients With Metastatic Colorectal Cancer

This is an open-label, multicenter Phase 2 clinical study designed to evaluate the safety, tolerability, pharmacokinetics, and preliminary efficacy of JS212-based combination therapies in patients with metastatic colorectal cancer (mCRC).

JS212 is a bispecific antibody-drug conjugate (ADC) targeting epidermal growth factor receptor (EGFR) and HER3 with a topoisomerase I inhibitor payload. Preclinical and early clinical data suggest that dual targeting of EGFR and HER3 may enhance antitumor activity and overcome resistance mechanisms associated with EGFR- or HER2-directed therapies.

Read more

This study will investigate JS212 in combination with capecitabine, with or without Bevacizumab, and JS212 in combination with chemotherapy (XELOX: capecitabine and oxaliplatin), with or without the PD-1/VEGF bispecific antibody JS207, in patients with mCRC.

The study will assess safety, determine the recommended Phase 3 dose (RP3D), and evaluate preliminary antitumor activity of the combination regimens.

Read the detailed description

JS212 is a bispecific antibody-drug conjugate (ADC) targeting epidermal growth factor receptor (EGFR) and HER3, conjugated with a topoisomerase I inhibitor payload. Activation of EGFR and HER3 signaling pathways plays an important role in tumor development and resistance to anticancer therapies. Dual targeting of these pathways may enhance antitumor activity and broaden the population that may benefit from treatment. Early clinical data from study JS212-001-I/II have demonstrated promising safety and antitumor activity of JS212.

In addition, ADCs may induce immunogenic cell death and enhance antitumor immune responses. Combination therapy with immune checkpoint inhibitors may further enhance therapeutic efficacy. JS207 is a bispecific antibody targeting programmed death-1 (PD-1) and vascular endothelial growth factor (VEGF), which may provide synergistic antitumor effects by simultaneously modulating immune checkpoint signaling and tumor angiogenesis.

This study will evaluate JS212 in combination with capecitabine, with or without Bevacizumab, and JS212 in combination with chemotherapy (capecitabine and oxaliplatin, XELOX), with or without JS207, in patients with mCRC.

The study includes 4 cohorts:

Cohort 1: JS212 in combination with capecitabine. A dose-escalation phase using a Bayesian optimal interval (BOIN) design will be conducted to determine the maximum tolerated dose (MTD) and recommended Phase 3 dose (RP3D), followed by a dose-expansion phase to further evaluate safety and efficacy.

Cohort 2: JS212 in combination with capecitabine and Bevacizumab. A safety run-in phase will be conducted to evaluate tolerability of the triple combination, followed by a dose-expansion phase to further assess safety and preliminary antitumor activity.

Cohort 3: JS212 in combination with XELOX chemotherapy. safety run-in phase will be conducted to evaluate tolerability of the triple combination, followed by a dose-expansion phase to further assess safety and preliminary antitumor activity.

Cohort 4: JS212 in combination with XELOX chemotherapy and JS207. A safety run-in phase will be conducted to evaluate tolerability of the triple combination, followed by a dose-expansion phase to further assess safety and preliminary antitumor activity.

Eligible participants include adults with histologically confirmed metastatic colorectal adenocarcinoma that is microsatellite stable or mismatch repair proficient and who have not received prior systemic therapy for advanced disease.

The study will evaluate safety, pharmacokinetics, immunogenicity, and preliminary efficacy outcomes including objective response rate (ORR), duration of response (DoR), disease control rate (DCR), progression-free survival (PFS), and overall survival (OS) based on RECIST version 1.1.

Being tested
JS212, Capecitabine, Bevacizumab, Oxaliplatin, JS207
Medical subject headings
Colorectal Neoplasms

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • JS212Drug

    Bispecific antibody-drug conjugate targeting EGFR and HER3

  • CapecitabineDrug

    Oral fluoropyrimidine chemotherapy

  • BevacizumabDrug

    Humanized anti-VEGF monoclonal antibody

  • OxaliplatinDrug

    Platinum-based chemotherapy administered intravenously

  • JS207Drug

    Bispecific antibody targeting PD-1 and VEGF

Study groups in NCT07503756
Study groupRoleWhat they receive
JS212 + CapecitabineExperimentalParticipants receive JS212 in combination with Capecitabine.
Receives: Drug: JS212; Drug: Capecitabine
JS212 +Capecitabine+ BevacizumabExperimentalParticipants receive JS212 in combination with Capecitabine and Bevacizumab
Receives: Drug: JS212; Drug: Capecitabine; Drug: Bevacizumab
JS212 + XELOXExperimentalParticipants receive JS212 in combination with XELOX chemotherapy (capecitabine plus oxaliplatin)
Receives: Drug: JS212; Drug: Capecitabine; Drug: Oxaliplatin
JS212 + XELOX + JS207ExperimentalParticipants receive JS212 in combination with XELOX chemotherapy and JS207
Receives: Drug: JS212; Drug: Capecitabine; Drug: Oxaliplatin; Drug: JS207

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Investigator-assessed objective response rate (ORR)

    Proportion of participants with confirmed complete response (CR) or partial response (PR) according to RECIST v1.1.

    Measured: Up to approximately 12 months

  2. Safety and Tolerability(AEs)

    Incidence and severity of adverse events (AEs) assessed according to CTCAE.

    Measured: From first dose up to approximately 90 days after last dose

  3. Safety and Tolerability(SAEs)

    Incidence and severity of serious adverse events (SAEs)assessed according to CTCAE.

    Measured: From first dose up to approximately 90 days after last dose

  4. Safety and Tolerability(DLTs)

    Incidence and severity dose-limiting toxicities (DLTs) assessed according to CTCAE.

    Measured: From first dose up to approximately 90 days after last dose

  5. Maximum Tolerated Dose (MTD)

    Determination of MTD for JS212 combination therapy.

    Measured: Up to approximately 6 months

  6. Recommended Phase 3 Dose (RP3D)

    Determination of RP3D for JS212 combination therapy.

    Measured: Up to approximately 6 months

Secondary outcomes (8)
  1. Investigator-assessed objective response rate (DCR)

    The DCR is defined as the proportion of subjects whose Best Overall Response (BOR) is Complete Response (CR), Partial Response (PR), or Stable Disease (SD).

    Measured: Up to approximately 12 months

  2. Investigator-assessed Duration of Response (DoR)

    The DoR is defined as the time from the first occurrence of CR or PR to the first occurrence of Progressive Disease (PD) or death (whichever occurs first). The DoR is only applicable to subjects whose BOR is CR or PR.

    Measured: Up to approximately 12 months

  3. Investigator-assessed Progression-Free Survival (PFS)

    The PFS is defined as the time from the first administration of the drug to the first documented disease progression (PD) according to the RECIST v1.1 criteria or death due to any disease (whichever occurs first).

    Measured: Up to approximately 12 months

  4. Investigator-assessed overall survival (OS)

    The OS is defined as the time from the first administration of the drug to death due to any cause.

    Measured: Up to approximately 20 months

  5. PK of Cmax

    Maximum Observed Plasma Concentration (Cmax) of JS212 and JS207

    Measured: Up to approximately 12 months

  6. PK of AUC

    Area Under the Concentration-Time Curve of JS212 and JS207

    Measured: Up to approximately 12 months

  7. PK of half-time

    Terminal Elimination Half-life of JS212 and JS207

    Measured: Up to approximately 12 months

  8. Immunogenicity

    Incidence of anti-drug antibodies (ADA) and neutralizing antibodies.

    Measured: Up to approximately 12 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted31 Mar 2026
  2. Study start25 Apr 2026
  3. Primary completion30 Dec 2027 (estimated)
  4. Study completion30 Mar 2028 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Non-randomised
Intervention model
Parallel groups
Model description
This is a phaseII, open-label, multicenter study in previously untreated MSS/pMMR advanced colorectal cancer, evaluating JS212+Capecitabine (Cohort 1), JS212+Capecitabine+Bevacizumab (Cohort 2), JS212 + XELOX (Cohort 3) and JS212 + XELOX + JS207 (Cohort 4). Cohort 1: A dose-escalation phase (JS212 Q3W +Capecitabine) will select 1-2 RP2Ds, followed by a dose-expansion phase to assess safety, efficacy. Cohort 2: After confirming Cohort 1's RP2D, a safety lead-in phase will evaluate JS212 (RP2D) + Capecitabine + Bevacizumab Q3W. A dose-expansion phase will further assess safety, efficacy. Cohort 3: After confirming Cohort 1's RP2D, a safety lead-in phase will evaluate JS212 (RP2D) + XELOX Q3W. A dose-expansion phase will further assess safety, efficacy. Cohort 4: After confirming Cohort 1's RP2D, a safety lead-in phase will evaluate JS212 (RP2D) + XELOX + JS207 Q3W. A dose-expansion phase will further assess safety, efficacy.
Masking
Single blind
Who is masked
Participant
Enrolment
80 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07503756
Sponsor's protocol ID
JS212-005-II-CRC
Status last verified
Apr 2026
First submitted
20 Mar 2026
Last updated
5 May 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing JS212, Capecitabine and Bevacizumab in people with Metastatic Colorectal Cancer, run by Shanghai Junshi Bioscience Co., Ltd. at 1 site in China.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 10 inclusion and 9 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: looking for participants now, as of the sponsor's last update on 5 May 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in China. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Ying Zhang, Master (86 18616904609, ying_zhang2@junshipharma.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Investigator-assessed objective response rate (ORR) (time frame: Up to approximately 12 months). The study lists 6 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 5 May 2026.

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