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GSK5784283

Phase 3

Asthma | Small molecule | Respiratory |GSK plc|Last Updated: Aug 24, 2026

Success Probability

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Trial Design

RandomizedDouble-BlindCONTROLLEDDMC
Total Trials4
Total Enrollment1,215

FDA Designations

No designations recorded

Clinical trial landscape

GSK5784283 · 8 trials · 3 indications

Phase 3 6Phase 2 1Phase 1 1
NCT07780643A Study to Investigate the Efficacy and Safety of GSK5784283 Compared With Placebo in Participants With Uncontrolled Asthma (PERSIST ASTHMA-1)Asthma
NOT YET_RECRUITING514 Analytics
NCT07780656A Study to Investigate the Efficacy and Safety of GSK5784283 (Felcorekibart) Compared With Placebo in Participants With Moderate to Very Severe COPD (PERSIST COPD-2)Pulmonary Disease, Chronic Obstructive
NOT YET_RECRUITING624 Analytics
NCT07780669A Study to Investigate the Efficacy and Safety of GSK5784283 (Felcorekibart) Compared With Placebo in Participants With Moderate to Very Severe COPD (PERSIST COPD-1)Pulmonary Disease, Chronic Obstructive
NOT YET_RECRUITING624 Analytics
NCT07782957A Study to Assess the Efficacy and Safety of GSK5784283 (Felcorekibart) Compared With Placebo in Participants With Chronic Rhinosinusitis With Nasal Polyps (CRSwNP)Nasal Polyps
NOT YET_RECRUITING218 Analytics
NCT07782970A Study to Assess the Efficacy and Safety of GSK5784283 (Felcorekibart) in Participants With Chronic Rhinosinusitis With Nasal Polyps (CRSwNP)Nasal Polyps
NOT YET_RECRUITING218 Analytics
NCT07782996A Study to Investigate the Efficacy and Safety of GSK5784283 Compared With Placebo in Participants With Uncontrolled Asthma (PERSIST ASTHMA-2)Asthma
NOT YET_RECRUITING370 Analytics
PHASE3NOT YET_RECRUITING
A Study to Investigate the Efficacy and Safety of GSK5784283 Compared With Placebo in Participants With Uncontrolled Asthma (PERSIST ASTHMA-1)
AsthmaUnlock trial analytics
PHASE3NOT YET_RECRUITING
A Study to Investigate the Efficacy and Safety of GSK5784283 (Felcorekibart) Compared With Placebo in Participants With Moderate to Very Severe COPD (PERSIST COPD-2)
Pulmonary Disease, Chronic ObstructiveUnlock trial analytics
PHASE3NOT YET_RECRUITING
A Study to Investigate the Efficacy and Safety of GSK5784283 (Felcorekibart) Compared With Placebo in Participants With Moderate to Very Severe COPD (PERSIST COPD-1)
Pulmonary Disease, Chronic ObstructiveUnlock trial analytics
PHASE3NOT YET_RECRUITING
A Study to Assess the Efficacy and Safety of GSK5784283 (Felcorekibart) Compared With Placebo in Participants With Chronic Rhinosinusitis With Nasal Polyps (CRSwNP)
Nasal PolypsUnlock trial analytics
PHASE3NOT YET_RECRUITING
A Study to Assess the Efficacy and Safety of GSK5784283 (Felcorekibart) in Participants With Chronic Rhinosinusitis With Nasal Polyps (CRSwNP)
Nasal PolypsUnlock trial analytics
PHASE3NOT YET_RECRUITING
A Study to Investigate the Efficacy and Safety of GSK5784283 Compared With Placebo in Participants With Uncontrolled Asthma (PERSIST ASTHMA-2)
AsthmaUnlock trial analytics

Study Endpoints

Primary Endpoints

Annualized rate of clinically significant asthma exacerbations
Up to Week 52

A clinically significant exacerbation is defined as a worsening of asthma symptoms requiring the use of systemic corticosteroids or in-patient hospitalization (that is greater than or equal to \[\>=\] 24 hours) due to asthma.

Annualized rate of moderate or severe COPD Exacerbations
Up to Week 78

Moderate exacerbations are defined as clinically significant exacerbations that require treatment with oral/systemic corticosteroids and/or antibiotics. Severe exacerbations are defined as clinically significant exacerbations that require in-patient hospitalization (that is greater than or equal to \[\>=\] 24 hours) or result in death.

Change from Baseline in total endoscopic nasal polyps (NP) score at Week 52
Baseline and Week 52

The NP score evaluated by endoscopy ranges from 0 to 4 in each nostril, with higher score indicating worse status. The total endoscopic NP score is the sum of the right and left nostril scores and ranges from 0 to 8, higher scores indicate worse status.

Change from Baseline in mean nasal obstruction score using Verbal Response Scale (VRS) from Week 51 through to Week 52
Baseline, Weeks 51 to 52 (time - average)

Participants will be asked to indicate the severity of nasal obstruction at their worst over the last 24 hours using a 4- point VRS ranging from 0 to 3 with higher scores indicating worse status. The average of daily scores will be calculated, and data will be presented for Weeks 51-52.

Part A: Change from baseline in the fraction of exhaled nitric oxide (FeNo)
Baseline (Day 1) and at 2, 4, 8,12, 20 and 26 weeks
Maximum Observed Concentration (Cmax) of GSK5784283 Serum Samples
Pre-dose and up to 253 days post dose
Area Under the Curve from Zero up to 253 Days [AUC(0-253 d)] of GSK5784283 Serum Samples
Pre-dose and up to 253 days post dose

Secondary Endpoints

Change from Baseline in pre-Bronchodilator Forced expiratory volume in 1 second (FEV1)
Baseline and at Week 52
Time to first clinically significant asthma exacerbation
Up to Week 52
Change from Baseline in Asthma Control Questionnaire-5 (ACQ-5) score
Baseline and at Week 52
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Participants receiving GSK5784283 plus standard of careEXPERIMENTAL -
Participants receiving matching placebo plus standard of carePLACEBO_COMPARATOR -
Participants receiving GSK5784283 + standard of care (SoC)EXPERIMENTAL -
Participants receiving Placebo + SoCPLACEBO_COMPARATOR -
Part A: Dose Finding - GSK5784283EXPERIMENTAL -
Part A: Dose Finding - PlaceboEXPERIMENTAL -
Part B: Extended Dosing - GSK5784283EXPERIMENTAL -
Part B: Extended Dosing - PlaceboEXPERIMENTAL -
GSK5784283 Test FormulationEXPERIMENTAL -
GSK5784283 Reference FormulationEXPERIMENTAL -

Interventions

NameTypeDescription
GSK5784283DRUGGSK5784283 will be administered.
PlaceboDRUGPlacebo will be administered.
Standard of careDRUGStandard of care will be administered.
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Eligibility Criteria

Age Range12 Years to 80 Years
SexALL
Healthy VolunteersNo

Inclusion Criteria: * Participants capable of giving signed informed consent, which includes compliance with the requirements and restrictions listed in Informed consent form (ICF). For participants aged 12 to 17 years, signed assent must be obtained from the participant in addition to signed conse...

Countries:United StatesBulgariaCanadaCzechiaGermanyJapanRomaniaSpainUnited Kingdom
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Recent Changes (Last 90 Days)

LOWAug 24, 2026NCT07782957NEW_TRIAL: changed
LOWAug 24, 2026NCT07782970NEW_TRIAL: changed
LOWAug 24, 2026NCT07782996NEW_TRIAL: changed
LOWAug 24, 2026NCT07782957NEW_TRIAL: changed
LOWAug 24, 2026NCT07782970NEW_TRIAL: changed
LOWAug 24, 2026NCT07782996NEW_TRIAL: changed
LOWAug 21, 2026NCT07780643NEW_TRIAL: changed
LOWAug 21, 2026NCT07780669NEW_TRIAL: changed
LOWAug 21, 2026NCT07780656NEW_TRIAL: changed
LOWAug 21, 2026NCT07780643NEW_TRIAL: changed
LOWAug 21, 2026NCT07780669NEW_TRIAL: changed
LOWAug 21, 2026NCT07780656NEW_TRIAL: changed
LOWAug 12, 2026NCT06748053primaryCompletionDate: changed
LOWAug 12, 2026NCT06748053primaryCompletionDate: changed
LOWJul 29, 2026NCT07712393Status: NOT_YET_RECRUITING → RECRUITING
LOWJul 29, 2026NCT07712393Status: NOT_YET_RECRUITING → RECRUITING
LOWJul 17, 2026NCT07712393NEW_TRIAL: changed
LOWJul 17, 2026NCT07712393NEW_TRIAL: changed

Frequently asked questions about GSK5784283

What is GSK5784283 used for?

GSK5784283 is an investigational small molecule being developed for respiratory conditions including asthma, chronic obstructive pulmonary disease (COPD), and nasal polyps. It is currently in Phase 3 clinical trials for asthma and COPD, with studies also exploring its use in adults with uncontrolled asthma.

What does GSK5784283 target?

GSK5784283 is an anti-TSLP antibody, meaning it targets thymic stromal lymphopoietin (TSLP), a cytokine involved in airway inflammation. By blocking TSLP, the drug aims to reduce inflammation in respiratory diseases like asthma and COPD.

Who makes GSK5784283?

GSK5784283 is being developed by GSK plc, a global biopharmaceutical company listed on the London Stock Exchange under the ticker GSK. The company is conducting multiple clinical trials to evaluate the drug's efficacy and safety in respiratory indications.

What phase is GSK5784283 in?

GSK5784283 is in Phase 3 clinical development. It has completed a Phase 2 dose-finding study in adults with uncontrolled asthma and is now being evaluated in Phase 3 trials for asthma and COPD, though none of these studies have been completed yet.

What clinical trials is GSK5784283 in?

GSK5784283 is being studied in four active clinical trials. These include NCT06748053, a Phase 2 dose-finding study in adults with uncontrolled asthma; NCT07780643, a Phase 3 trial in asthma (PERSIST ASTHMA-1); and NCT07780656 and NCT07780669, two Phase 3 trials in COPD (PERSIST COPD-1 and PERSIST COPD-2).

Is GSK5784283 the same as Felcorekibart?

Yes, GSK5784283 is also known as Felcorekibart. In the Phase 3 COPD trials, the drug is referred to as GSK5784283 (Felcorekibart), confirming that both names refer to the same investigational anti-TSLP antibody.