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Background/Aims The preferential Janus kinase-1 inhibitor filgotinib (FIL) is approved to treat RA in Europe. We assessed FIL efficacy/safety in patients (pts) with inadequate response (IR) to biologic DMARDs (bDMARDs) in a long-term extension trial (LTE; NCT03025308) enrolled from a Phase 3 parent study (PS; NCT02873936). Methods bDMARD-IR pts received FIL 200mg (FIL200), 100mg (FIL100), or placebo (PBO) and stable conventional synthetic (cs)DMARDs up to 24 weeks (W). At W14 of the PS, pts with IR to FIL or PBO ( Results The PS included 147, 153, and 148 pts on FIL200, FIL100, and PBO. Of the FIL200 pts who entered LTE, 80/121 continued study drug at June 1, 2020, as did 76/110 FIL100 pts. Pts still on LTE FIL from PBO were 35/47 FIL200 and 32/46 FIL100 pts; from SOC: 13/23 FIL200 and 13/22 FIL100 pts. LTE baseline (BL) characteristics were similar in FIL200 and FIL100 pts (mean RA duration: 13.2 and 12.8 years, DAS28[CRP]: 3.5 and 3.7). During LTE, PS FIL ACR20/50/70 response rates decreased modestly by W48. Among PS PBO pts, response rates were lower at LTE BL but reached similar levels as PS FIL pts by W48; rates increased up to W48 in SOC/FIL pts (either dose) but not to levels of other groups. Percentages of pts attaining DAS28(CRP) ≤3.2, DAS28(CRP) Conclusion Efficacy was mostly maintained in PS FIL pts up to W48. Response among PS PBO and SOC pts increased from BL to W48, but response in PS SOC pts continued to be lower than in other groups; these pts may represent a refractory population. FIL safety was largely consistent between PS and LTE. Disclosure M. Buch: Honoraria; reports research support, consulting, speaker or personal fees from AbbVie; Eli Lilly and Co.; Gilead Sciences, Inc.; Merck-Serono; Pfizer; Roche; Sanofi; and UCB. Grants/research support; received funding (paid to her host institution) for research from Gilead Gilead Sciences, Inc. T. Takeuchi: Consultancies; serving as a consultant for Astellas, Chugai, and Eli Lilly Japan. Member of speakers’ bureau; Speaker’s bureau AbbVie, AYUMI, Bristol-Myers Squibb, Chugai, Daiichi Sankyo, Eisai, Eli Lilly Japan, Gilead Sciences, Mitsubishi-Tanabe, Novartis, Pfizer Japan, Sanofi, and Dainippon Sumitomo. Grants/research support; reports receiving grant/research support from AbbVie, Asahi Kasei, Astellas, Chugai, Daiichi Sankyo, Eisai, Mitsubishi-Tanabe, Shionogi, Takeda, and UCB Japan. V. Rajendran: Shareholder/stock ownership; employee of and shareholder in Galapagos NV. J. Gottenberg: Consultancies; serving as a consultant for Bristol-Myers Squibb, Sanofi Genzyme, and UCB. Member of speakers’ bureau; serving on a speaker’s bureau for Gilead Sciences, Inc., Galapagos, AbbVie, Eli Lilly and Co., Roche, Sanofi Genzyme, and UCB. Grants/research support; reports receiving grant/research support from Bristol-Myers Squibb and Pfizer. A. Pechonkina: Other; employee of Gilead Sciences, Inc. and may own stock in Gilead Sciences, Inc. Y. Tan: Other; employee of Gilead Sciences, Inc. and may own stock in Gilead Sciences, Inc. Q. Gong: Other; employee of Gilead Sciences, Inc. and may own stock in Gilead Sciences, Inc. K. Van Beneden: Other; employee of and shareholder in Galapagos NV. R. Caporali: Honoraria; reports receiving speaker’s fees and consultation grants from AbbVie, BMS, Celltrion, Fresenius-Kabi, Gilead-Galapagos, Lilly, MSD, Pfizer, Roche, Samsung-Bioepis, Sanofi and UCB.

Background Filgotinib (FIL) is an oral, selective janus kinase 1 inhibitor under development for the treatment of rheumatoid arthritis (RA) and other inflammatory diseases. Safety and efficacy of FIL was investigated in the FINCH clinical program, which includes three Phase 3, summarized, summarized studies in patients with moderate to severely active RA. FINCH1: patients with inadequate response to MTX (NCT02889796); FINCH2: patients receiving conventional disease-modifying antirheumatic drugs (csDMARDs) with inadequate response to biological DMARDs (NCT02873936); FINCH3: MTX-naïve patients initiating MTX ± FIL, or receiving FIL monotherapy (NCT02886728). We present pooled safety data up to 24 weeks (W24). Methods The FINCH studies enrolled patients with RA (2010 ACR/EULAR criteria), ≥6 swollen joints and ≥6 tender joints at screening and Day 1. Safety analyses included patients receiving ≥1 dose of study drug. Patients in FINCH 1 and 2 who did not experience at least a 20% improvement in both swollen joint count and tender joint count by W14 discontinued study drug and switched to standard of care. W24 safety data from all studies were aggregated and ummarized. Key safety endpoints were treatment-emergent adverse events (TEAEs), serious TEAEs, TEAEs of interest, deaths and treatment-emergent laboratory abnormalities. Results 3,452 patients were evaluated; 2,088 received FIL. At W24, the frequency of TEAEs and TEAEs of interest were similar for those who received FIL and those in the control groups (Table 1). Most TEAEs were infections. Laboratory abnormality rates were similar between FIL and control groups, and were mild to moderate (grades 1 and 2). Overall, the frequency of major adverse cardiac events, herpes zoster virus, deep vein thrombosis and pulmonary embolism was low, and similar across groups. Conclusion Pooled data from this large database highlights the favourable safety and tolerability profile of FIL in patients with RA both as monotherapy and in combination with MTX/csDMARD. Disclosures D. Walker: Other; Received support from Lilly, Pfizer, Novartis and Roche. K. Winthrop: Grants/research support; Received grants for clinical research from Bristol-Myers Squibb Company and Insmed Incorporated. Other; Received support from AbbVie, Bristol-Myers Squibb, Gilead, Janssen, Eli Lilly & Co., MSD, Novartis, Pfizer, Roche-Chugai, Sanofi, and UCB. M.C. Genovese: Other; Gilead Sciences Inc., Galapagos NV, AbbVie Inc. Eli Lilly and Company, Pfizer. B.G. Combe: Honoraria; Honoraria from AbbVie, BMS, Gilead, Janssen, Eli Lilly and Co., MSD, Novartis, Pfizer, Roche-Chugai, Sanofi and UCB. Y. Tanaka: Honoraria; Received from Daiichi-Sankyo, Astellas, Chugai, Eli Lilly and Co., Pfizer, AbbVie, YL Biologics, BMS, Takeda, Misubishi-Tanabe, Novartis, Eisai, Janssen, Teijin. Grants/research support; Received grant support from Asahi-Kasei, Mitsubishi-Tanabe, Chugai, Takeda, Sanofi, BMS, UCB, Daiichi-Sankyo, Eisai, and Ono. A. Kivitiz: Consultancies; Consultant for AbbVie, Celgene, Horizon, Janssen, Merck, Novartis, Pfizer, UCB, Genzyme,Sanofi, Regeneron, SUN Pharma Advanced Research, Boehringer Ingelheim and Flexion. Shareholder/stock ownership; Shareholder of Novartis. F. Matzkies: Corporate appointments; Employee of Gilead Sciences, Inc. Shareholder/stock ownership; Shareholder of Gilead Sciences, Inc. B. Bartok: Corporate appointments; Employee of Gilead Sciences, Inc. Shareholder/stock ownership; Shareholder of Gilead Sciences, Inc. L. Ye: Corporate appointments; Employee of Gilead Sciences, Inc. Shareholder/stock ownership; Shareholder of Gilead Sciences, Inc. Y. Guo: Corporate appointments; Gilead Sciences, Inc. Shareholder/stock ownership; Gilead Sciences, Inc. C. Tasset: Corporate appointments; Employee of Galapagos NV. J.S. Sundy: Corporate appointments; Employee of Gilead Sciences, Inc. Shareholder/stock ownership; Shareholder of Gilead Sciences, Inc. E. Keystone: Consultancies; AbbVie, Amgen, AstraZeneca Pharma, Biotest, BMS Canada, Celltrion, Crescendo, Bioscience, F.Hoffman-La Roche Inc., Genentech, Janssen, Eli Lilly and Co., Merck, Pfizer, PuraPharm, Sandoz,, Sanofi-Aventis, Sanofi- Genzyme Samsung Bioepsis, and UCB. Other; AbbVie, Amgen, AstraZeneca Pharma, Biotest, BMS Canada, Celltrion, Crescendo, Bioscience, F.Hoffman-La Roche Inc., Genentech, Janssen, Eli Lilly and Co., Merck, Pfizer, PuraPharm, Sandoz,, Sanofi-Aventis, Sanofi-Genzyme, Samsumg Bioepsis, and UCB. R. Westhovens: Corporate appointments; An investigator and advisor for Celltrion and Galapagos/Gilead. W. Rigby: Consultancies; Consultancy for Gilead. G.R. Burmester: Consultancies; Consultancy from AbbVie, Gilead, Eli Lilly, and Pfizer. Honoraria; Honoraria from AbbVie, Gilead, Eli Lilly, and Pfizer.

Background Filgotinib (FIL) is an oral, potent, selective Janus kinase 1 inhibitor that has shown good efficacy and was well tolerated for treatment of rheumatoid arthritis (RA). The objective of this study was to evaluate efficacy and safety of FIL treatment in patients with RA who have had an inadequate response to methotrexate (MTX). Methods This Phase 3, double-blind, active- and placebo (PBO)-controlled study randomised patients with active RA (3:3:2:3) to FIL 200mg, FIL 100mg, adalimumab [ADA] 40mg every 2 weeks, or PBO daily for up to 52 weeks; results through week 24 are presented. Patients also received background MTX. Primary efficacy endpoint was proportion of patients achieving ACR20 at week 12; additional clinical assessments included ACR50 and ACR70 and DAS28-CRP score ≤3.2 and 50% of ADA response) was performed for DAS28-CRP ≤3.2 and Results Of 1,759 patients randomised, 1,755 received study drug: 475 FIL 200mg; 480 FIL 100mg; 325 ADA; and 475 PBO, of which 89.5%, 90.4%, 88.9%, and 81.3%, respectively, completed 24 weeks of study drug. 81.8% were female, mean (standard deviation [SD]) duration of RA was 7.8 (7.6) years, and mean (SD) DAS28-CRP was 5.7 (0.9). At week 12, significantly more patients in the FIL 200mg and 100mg arms achieved an ACR20 improvement vs PBO (Table 1). More patients receiving FIL achieved ACR50 and ACR70 improvements, DAS28-CRP scores ≤3.2 and Conclusion FIL 200mg and 100mg led to significant improvement in signs and symptoms of RA, prevented radiographic progression, improved physical function compared to PBO, and was well-tolerated. Efficacy of FIL 200mg was non-inferior to ADA based on DAS28-CRP ≤3.2. Disclosures D. Walker: Other; Received support from Lilly, Pfizer, Novartis and Roche. B.G. Combe: Honoraria; Received honoraria from AbbVie, BMS, Gilead, Janssen, Eli Lilly and Co., MSD, Novartis, Pfizer, Roche-Chugai, Sanofi and UCB. A.J. Kivitiz: Consultancies; Consultant to AbbVie, Celgene, Horizon, Jansses, Merck, Novartis, Pfizer, UCB, Genzyme, Sanofi, Regeneron, SUN Pharma Advanced Research, Boehringer Ingelheim, Flexion and Novartis. Shareholder/stock ownership; Shareholder of Novartis. Y. Tanaka: Honoraria; Honoraria from Daiichi-Sankyo, Astellas, Chugai, Eli Lilly ans Co., Pfizer, AbbVie, YL Biologics, BMS, Takeda, Misubishi-Tanabe, Novartis, Eisai, Janssen, Teijin. Grants/research support; Grant support from Asahi-Kasei, Mitsubishi-Tanabe, Chugai, Takeda, Sanofi, BMS, UCB, Daiichi-Sankyo, Eisai, Ono, Astellas, Eli Lilly, Pfizer, Abbvi and YL. D. van der Heijde: Corporate appointments; Director of Imaging Rheumatology bv. Consultancies; Consultant for consultant for AbbVie, Amgen, Astellas, AstraZeneca, BMS, Boehringer Ingelheim, Celgene, Daiichi, Eli Lilly, Galapagos, Gilead, Glaxo-Smith-Kline, Janssen, Merck, Novartis, Pfizer, Regeneron, Roche, Sanofi, Takeda, and UCB. F. Matzkies: Corporate appointments; Employee of Gilead Sciences, Inc. Shareholder/stock ownership; Shareholder of Gilead Sciences, Inc. B. Bartok: Corporate appointments; Employee of Gilead Sciences, Inc. Shareholder/stock ownership; Shareholder of Gilead Sciences, Inc. L. Ye: Corporate appointments; Employee of Gilead Sciences, Inc.. Shareholder/stock ownership; Shareholder of Gilead Sciences, Inc. Y. Guo: Corporate appointments; Employee of Gilead Sciences, Inc. Shareholder/stock ownership; Shareholder of Gilead Sciences, Inc. C. Tasset: Corporate appointments; Employee of Galapagos NV. J.S. Sundy: Corporate appointments; Employee of Gilead Sciences, Inc. Shareholder/stock ownership; Shareholder of Gilead Sciences, Inc. N. Mozaffarian: Corporate appointments; Employee of Gilead Sciences, Inc. Shareholder/stock ownership; Shareholder of Gilead Sciences, Inc. R.B.M. Landewé: Consultancies; Consultant for AbbVie, AstraZeneca, BMS, Galapagos, Pfizer, Eli Lilly, Novartis, and UCB.. S. Bae: None. E.C. Keystone: Consultancies; Consultant for AbbVie, Amgen, AstraZeneca Pharma, Biotest, BMS Canada, Celltrion, Crescendo, Bioscience, F.Hoffman-La Roche Inc., Genentech, Janssen, Eli Lilly and Co., Merck, Pfizer,, PuraPharm, Sandoz, Sanofi-Aventis, Sanofi-Genzyme, Samsumg Bioepsis, and UCB. P. Nash: Consultancies; Consultant for AbbVie, BMS, Jansses, Pfizer, Roche, Lilly, Sanofi, MSD, Novartis, Celgene and Gilead.

Eli Lilly and Co.’s experimental molt inhibiting insecticide EL-494 was tested against cabbage looper and imported cabbageworm. Treatments were applied to ‘Late Flat Dutch’ cabbages planted June 10at the University of Minnesota Rosemount Experiment Station. Field plots were single, 25-ft rows spaced 40 inches apart, with 18-inch in-row plant spacing. The insecticide was applied August 11 for the first test and August 19 for the second with a 2-gallon hand-operated compressed-air sprayer in 137 gal water/acre at ca 40 psi. Different plots were used for each test. The day after spraying cabbage leaves were cut from treated plants and from untreated checks, and larvae of both insect species were collected from untreated plants in an adjacent plot. The larvae used in the first test were fifth instar, in the second test the cabbage loopers were third instar and the imported cabbageworm fourth instar. Leaves were harvested from the treatments 1 day after application of thesprays, placed in plastic bags and held at 4°C until used. In the laboratory previously unexposed larvae were placed individually in petri dishes on ca 4 square inches of cabbage leaf. Each test consisted of 10 larvae and was replicated 3 times. Insects were examined daily and food changed as necessary.