ClinicalTrials.gg
RecruitingNCT06952075Updated Apr 30, 2025

GR1803 Injection in Patients With RRMM

A Phase 2 interventional study of GR1803 in Multiple Myleoma, sponsored by Genrix (Shanghai) Biopharmaceutical Co., Ltd.. Recruiting at 1 site in China. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-04-30.

Sponsored by Genrix (Shanghai) Biopharmaceutical Co., Ltd. (part of Chongqing Genrix Biopharmaceutical Co., Ltd) · Phase 2, Interventional, and Treatment

From the registry’s dates

  • Started Apr 2025; still recruiting 1 year 6 months later.

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Phase
Phase 2
Study type
Interventional
Enrollment
30
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

All subjects will receive GR1803 injection until intolerable toxicity or investigator-assessed disease progression occurs (except in cases of disease progression due to discontinuation of the drug as a result of an adverse event) or until the subject has been administered the drug for 2 years or until the subject withdraws consent or until the investigator determines that the subject needs to be discontinued.

02

Conditions studied

  • Multiple Myleoma
03

In context

Lead sponsor

Genrix (Shanghai) Biopharmaceutical Co., Ltd. is the lead sponsor of 28 studies on the registry; 17 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • 1、 score 0-2 2、≥18 years of age 3、Multiple myeloma must be Complicated by Extramedullary Plasmacytoma.

Exclusion criteria

Exclusion Criteria:

  • 1、Prior treatment with any BCMA-targeted therapy 2、Known active CNS involvement or exhibits clinical signs of meningeal involvement of multiple myeloma 3、Known allergies, , or intolerance to the study drug (teclistamab) or its 4、Plasma cell leukemia , Waldenström's macroglobulinemia, POEMS syndrome (polyneuropathy, organomegaly, endocrinopathy, monoclonal protein, and skin changes), or primary amyloid light-chain amyloidosis.
Terms in these criteria, in plain language(3)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

Excipients

The other ingredients in a medicine besides the active drug, such as fillers, colours or preservatives.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
30 participants (estimated)

Study arms

  • Experimental
    GR1803

    Drug: GR1803

Interventions

  • DrugGR1803

    D1 given at a dose of 10ug/kg, D4 given at a dose of 30ug/kg, D8 given at a dose of 180ug/kg, followed by weekly dosing up to cycle 9, and cycle 10 and onwards, every 2 weeks, with a dosing cycle of every 4 weeks

06

What researchers measure

Primary outcomes

  1. ORR

    Sum of the proportions of patients with proven strict complete remission (sCR), complete remission (CR), very good partial remission (VGPR) and partial remission (PR)

    Time frame: 2 years

Secondary outcomes

  1. Progression-free survival (PFS)

    Time from enrollment to tumor progression or death from any cause

    Time frame: 2 years

  2. AE

    adverse event

    Time frame: 2 years

07

Study locations

1 of 1 sites recruiting
08

References and documents

Individual participant data

Plan to share: No — Study Protocol

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Started Apr 2025 (actual). Primary completion is estimated for Jul 2027, 26 months after the start.

How these figures are worked out, and which studies are left out of them.

Registered
Apr 23, 2025
First posted
Apr 30, 2025
StartActual
Apr 24, 2025
Primary completionEst.
Jul 1, 2027
CompletionEst.
Dec 1, 2027
Last update
Apr 30, 2025
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Apr 30, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06952075
Responsible party
Sponsor
First posted
Apr 30, 2025
Start date
Apr 24, 2025
Primary completion
Jul 1, 2027 (estimated)
Completion
Dec 1, 2027 (estimated)
Last update
Apr 30, 2025

Study contacts

Gang An, PhD
Contact
angang@ihcams.ac.cn
+8613502181109

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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Discussion

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Studies of the drug tested here: GR1803

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