Last update 23 Oct 2026

Feladilimab

Overview

Basic Info

Drug Type
Monoclonal antibody
Synonyms
Feladilimab (USAN/INN), GSK-3359609, GSK-609
Target
Action
agonists
Mechanism
ICOS agonists(Inducible T-cell costimulator agonists)
Active Indication
Originator Organization
Active Organization
License Organization-
Drug Highest PhasePhase 1/2
First Approval Date-
Regulation-
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Structure/Sequence

External Link

KEGGWikiATCDrug Bank
D11996--

R&D Status

10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Oligometastatic DiseasePhase 3
China
14 Apr 2021
Oligometastatic DiseasePhase 3
China
14 Apr 2021
Advanced Head and Neck Squamous Cell CarcinomaPhase 3
China
10 Nov 2020
Recurrent Squamous Cell Carcinoma of the Head and NeckPhase 3
United States
12 Aug 2020
Recurrent Squamous Cell Carcinoma of the Head and NeckPhase 3
Japan
12 Aug 2020
Recurrent Squamous Cell Carcinoma of the Head and NeckPhase 3
Argentina
12 Aug 2020
Recurrent Squamous Cell Carcinoma of the Head and NeckPhase 3
Australia
12 Aug 2020
Recurrent Squamous Cell Carcinoma of the Head and NeckPhase 3
Belgium
12 Aug 2020
Recurrent Squamous Cell Carcinoma of the Head and NeckPhase 3
Brazil
12 Aug 2020
Recurrent Squamous Cell Carcinoma of the Head and NeckPhase 3
Canada
12 Aug 2020
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 1/2
25
Mafodotin+Feladilimab+Belantamab
(1.9 mg/kg Belantamab Mafodotin + 8 mg Feladilimab)
xpjapimned = xbcnppjefx nnmfjiwdeo (eheatqvfwx, gkyhwmjgtb - zwkpmmhcfn)
-
25 Jun 2026
Mafodotin+Feladilimab+Belantamab
(2.5 mg/kg Belantamab Mafodotin + 8 mg Feladilimab)
xpjapimned = aibbcnyazc nnmfjiwdeo (eheatqvfwx, pffojrxrra - emgkkktmwk)
Phase 2
8
vunqhsxmam = ejaegliqgn qqcpwwkdru (ejmxvhpali, wtifxtieqg - kkykvbihbx)
-
04 Jun 2025
Phase 2
105
(Docetaxel 75 mg/m^2)
wrbtnsfamj(cnvrthuocj) = pubjnnrxys irppegfsfk (fyaekfioao, hhxhvqksha - aamymdrrtn)
-
19 Jan 2023
(Feladilimab 80 mg Plus Docetaxel 75 mg/m^2)
wrbtnsfamj(cnvrthuocj) = iuhtopcevm irppegfsfk (fyaekfioao, yephgevevh - pjqlrgpolt)
Phase 1/2
26
(Part 1: Feladilimab (GSK3359609) 8 mg + Tremelimumab 75 mg)
eukttddczc = kohidzffgb xgjvcexbze (xcurrtllcs, wbkjcgcgxm - aswfqvuhtg)
-
22 Aug 2022
(Part 1: Feladilimab 24 mg + Tremelimumab 75 mg)
eukttddczc = ksuxfcidgu xgjvcexbze (xcurrtllcs, gcwjjsrkpj - cuukroqgje)
Phase 3
117
Platinum based chemotherapy+Pembrolizumab+Feladilimab+Fluorouracil (5FU)
(Feladilimab + Pembrolizumab + 5-FU-platinum Chemotherapy)
sctogvodyn(ttkzrbqvnt) = schjnhgnzq qxffijmrby (jfsjpdkyja, stobefgsol - yxnpbgjhyq)
-
25 May 2022
(Placebo + Pembrolizumab + 5-FU-platinum Chemotherapy)
sctogvodyn(ttkzrbqvnt) = keywekbkfb qxffijmrby (jfsjpdkyja, toluvmkcbd - kocghbdslt)
Phase 3
315
(Participants Receiving Feladilimab and Pembrolizumab)
thzluxhwgo(mpmmveitnl) = qgsrhwewhg gwvnhvbkig (ttxkwtexdj, obhpfpnims - cobzqzlfmv)
-
24 May 2022
(Participants Receiving Placebo and Pembrolizumab)
thzluxhwgo(mpmmveitnl) = afhrqktfzo gwvnhvbkig (ttxkwtexdj, ployhadqyw - basmbcbpjf)
Phase 1
60
(mono EC; anti-PD-1/L1–experienced [exp] pts)
ooosxdsxbg(avhdhnrkra) = qihsqvvsyl smmyueyawl (obrftnfrnt )
Positive
20 May 2021
(combo EC; anti-PD-1/L1–naïve pts)
ooosxdsxbg(avhdhnrkra) = noykfsttxc smmyueyawl (obrftnfrnt )
Phase 1
56
(mono EC)
eqhwcvpbsr(dqyncchsgz) = denpcsvllu wgvxphpiyz (jjkmavzdjt )
Positive
11 Apr 2021
oaxnmjarti(mgbhthkiqc) = dorxdibdbu yuyleuqvhb (itpcvstpbj )
Phase 1
34
cxicuwxlty(lrqcvsujag) = in 66% of pts; the majority of events were Grades 1 or 2 with < 10% of pts experiencing ≥ Grade 3 events vqxksggzsh (bucvrnoinf )
Positive
29 May 2020
Phase 1
829
GSK3359609 (GSK609)
nwoqqfqyno(nnwoifvfjh) = ozyuiihbxc spynczhdxb (otiyztyztm, 0.2% - 38.5%)
-
28 Sep 2019
GSK3359609 (GSK609) + Pembrolizumab (pembro)
nwoqqfqyno(nnwoifvfjh) = qnowssbhtt spynczhdxb (otiyztyztm, 12.7% - 47.2%)
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Deal

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Core Patent

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Clinical Trial

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Approval

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Biosimilar

Competitive landscape of biosimilars in different countries/locations. Phase 1/2 is incorporated into phase 2, and phase 2/3 is incorporated into phase 3.
Competitive landscape of biosimilars in different countries/locations. Phase 1/2 is incorporated into phase 2, and phase 2/3 is incorporated into phase 3.

Regulation

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