A Study of Long-acting Antibodies Alone and in Combinations for Moderate to Severe Ulcerative Colitis (SKYLINE-UC)

June 4, 2026 updated by: Spyre Therapeutics, Inc.

Phase 2 Platform Trial to Assess the Efficacy and Safety of Long-acting Antibodies as Single Agents and in Combinations for Moderately to Severely Active Ulcerative Colitis

This is a Phase 2, multicenter, proof-of-concept platform study in adult participants with moderately to severely active ulcerative colitis (UC). The primary goal of the study is to assess the efficacy and safety of multiple interventions following intravenous (IV) induction and subcutaneous (SC) maintenance treatment.

Study Overview

Detailed Description

This platform study will evaluate the efficacy and safety of investigational treatments, including 3 monotherapies and 3 combination therapies, for moderately to severely active UC in adults. The study will progress in two parts.

Part A is the open-label portion of the study assessing safety and preliminary efficacy of monotherapies.

Part B, which will be open for enrollment after Part A, is the randomized, placebo-controlled portion of the study assessing the safety and efficacy of the 6 interventions (3 monotherapies and 3 combinations) compared to placebo.

Intervention arms will be added to the study over time and may complete at different times.

Study Type

Interventional

Enrollment (Estimated)

645

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

    • Sant Fe
      • Rosario, Sant Fe, Argentina, 2000
        • Recruiting
        • Site 103
        • Contact:
          • SKYLINE-UC Trial Center
    • Tucumán Province
      • San Miguel de Tucumán, Tucumán Province, Argentina, 4000
        • Recruiting
        • Site 104
        • Contact:
          • SKYLINE-UC Trial Center
      • Concord, Australia, 2139
        • Recruiting
        • Site 208
        • Contact:
          • SKYLINE-UC Trial Center
      • Heidelberg, Australia, 3084
        • Recruiting
        • Site 202
        • Contact:
          • SKYLINE-UC Trial Center
      • Liverpool, Australia, 2170
        • Recruiting
        • Site 204
        • Contact:
          • SKYLINE-UC Trial Center
      • Melbourne, Australia, 3004
        • Recruiting
        • Site 203
        • Contact:
          • SKYLINE-UC Trial Center
      • South Brisbane, Australia, 4101
        • Recruiting
        • Site 206
        • Contact:
          • SKYLINE-UC Trial Center
      • Woolloongabba, Australia, 4102
        • Recruiting
        • Site 207
        • Contact:
          • SKYLINE--UC Trial Center
      • Linz, Austria, 4021
        • Recruiting
        • Site 463
        • Contact:
          • SKYLINE-UC Trial Center
      • Bruges, Belgium, 8310
        • Recruiting
        • Site 475
        • Contact:
          • SKYLINE-UC Trial Center
      • Ghent, Belgium, 9000
        • Recruiting
        • Site 471
        • Contact:
          • SKYLINE-UC Trial Center
      • Roeselare, Belgium, 9000
        • Recruiting
        • Site 472
        • Contact:
          • SKYLINE-UC Trial Center
    • Osst-Vlaanderen
      • Ghent, Osst-Vlaanderen, Belgium, 9000
        • Recruiting
        • Site 476
        • Contact:
          • SKYLINE-UC Trial Center
      • Sint-Niklaas, Osst-Vlaanderen, Belgium, 9100
        • Recruiting
        • Site 474
        • Contact:
          • SKYLINE-UC Trial Center
      • Banja Luka, Bosnia and Herzegovina, 78 000
        • Recruiting
        • Site 481
        • Contact:
          • SKYLINE-UC Trial Center
      • Mostar, Bosnia and Herzegovina, 88000
        • Recruiting
        • Site 484
        • Contact:
          • SKYLINE-UC Trial Center
      • Sarajevo, Bosnia and Herzegovina, 71000
        • Recruiting
        • Site 483
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Gorna Oryahovitsa, Bulgaria, 5100
        • Recruiting
        • Site 494
        • Contact:
          • SKYLINE-UC Trial Center
      • Rousse, Bulgaria, 7002
        • Recruiting
        • Site 498
        • Contact:
          • SKYLINE-UC Trial Center
      • Sofia, Bulgaria, 1343
        • Recruiting
        • Site 492
        • Contact:
          • SKYLINE-UC Trial Center
      • Sofia, Bulgaria, 1463
        • Recruiting
        • Site 495
        • Contact:
          • SKYLINE-UC Trial Center
      • Greater Sudbury, Canada, P3C1X3
        • Recruiting
        • Site 085
        • Contact:
          • SKYLINE-UC Trial Center
      • London, Canada, N6K 1M6
        • Recruiting
        • Site 086
        • Contact:
          • SKYLINE-UC Trial Center
    • Ontario
      • London, Ontario, Canada, G8H 3P7
        • Recruiting
        • Site 083
        • Contact:
          • SKYLINE-UC Trial Center
    • Los Lagos Region
      • Osorno, Los Lagos Region, Chile, 5290000
        • Recruiting
        • Site 153
        • Contact:
          • SKYLINE-UC Trial Center
      • Osijek, Croatia, 31000
        • Recruiting
        • Site 521
        • Contact:
          • SKYLINE-UC Trial Center
      • Brno, Czechia, 615 00
        • Recruiting
        • Site 531
        • Contact:
          • SKYLINE-UC Trial Center
      • Klatovy, Czechia, 33901
        • Recruiting
        • Site 536
        • Contact:
          • SKYLINE-UC Trial Center
      • Ostrava, Czechia, 702 00
        • Recruiting
        • Site 534
        • Contact:
          • SKYLINE-UC Trial Center
      • Pardubice, Czechia, 532 03
        • Recruiting
        • Site 537
        • Contact:
          • SKYLINE-UC Trial Center
      • Prague, Czechia, 150 00
        • Recruiting
        • Site 538
        • Contact:
          • SKYLINE-UC Trial Center
      • Marseille, France, 13015
        • Recruiting
        • Site 555
        • Contact:
          • SKYLINE-UC Trial Center
      • Nantes, France, 44300
        • Recruiting
        • Site 551
        • Contact:
          • SKYLINE-UC Trial Center
      • Nice, France, 06200
        • Recruiting
        • Site 557
        • Contact:
          • SKYLINE-UC Trial Center
      • Pierre-Bénite, France, 69310
        • Recruiting
        • Site 556
        • Contact:
          • SKYLINE-UC Trial Center
      • Saint-Etienne, France, 42270
        • Recruiting
        • Site 558
        • Contact:
          • SKYLINE-UC Trial Center
      • Kutaisi, Georgia, 4600
        • Recruiting
        • Site 584
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Marneuli, Georgia, 3000
        • Recruiting
        • Site 589
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Tbilisi, Georgia, 0159
        • Recruiting
        • Site 582
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Tbilisi, Georgia, 0178
        • Recruiting
        • Site 590
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Tbilisi, Georgia, 0180
        • Recruiting
        • Site 585
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Tbilisi, Georgia, 0102
        • Recruiting
        • Site 581
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Tbilisi, Georgia, 0114
        • Recruiting
        • Site 588
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Tbilisi, Georgia, 0144
        • Recruiting
        • Site 586
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Tbilisi, Georgia, 0159
        • Recruiting
        • Site 587
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Tbilisi, Georgia, 01444
        • Recruiting
        • Site 583
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Berlin, Germany, 14163
        • Recruiting
        • Site 604
        • Contact:
          • SKYLINE-UC Trial Center
      • Berlin, Germany, 10117
        • Recruiting
        • Site 606
        • Contact:
          • SKYLINE-UC Trial Center
      • Brandenburg an der Havel, Germany, 14770
        • Recruiting
        • Site 611
        • Contact:
          • SKYLINE-UC Trial Center
      • Dachau, Germany, 85221
        • Recruiting
        • Site 607
        • Contact:
          • SKYLINE-UC Trial Center
      • Frankfurt am Main, Germany, 60590
        • Recruiting
        • Site 610
        • Contact:
          • SKYLINE-UC Trial Center
      • Kiel, Germany, 24105
        • Recruiting
        • Site 602
        • Contact:
          • SKYLINE-UC Trial Center
      • Leipzig, Germany, 04103
        • Recruiting
        • Site 608
        • Contact:
          • SKYLINE-UC Trial Center
      • Munich, Germany, 81377
        • Recruiting
        • Site 609
        • Contact:
          • SKYLINE-UC Trial Center
      • Ulm, Germany, 89081
        • Recruiting
        • Site 603
        • Contact:
          • SKYLINE-UC Trial Center
      • Athens, Greece, 10676
        • Recruiting
        • Site 634
        • Contact:
          • SKYLINE-UC Trial Center
      • Athens, Greece, 115 27
        • Recruiting
        • Site 632
        • Contact:
          • SKYLINE-UC Trial Center
      • Chaïdári, Greece, 124 62
        • Recruiting
        • Site 631
        • Contact:
          • SKYLINE-UC Trial Center
    • Attica
      • Athens, Attica, Greece, 11527
        • Recruiting
        • Site 635
        • Contact:
          • SKYLINE-UC Trial Center
      • Budapest, Hungary, H-1083
        • Recruiting
        • Site 656
        • Contact:
          • SKYLINE-UC Trial Center
      • Budapest, Hungary, H-1088
        • Recruiting
        • Site 651
        • Contact:
          • SKYLINE-UC Trial Center
      • Budapest, Hungary, H-1062
        • Recruiting
        • Site 655
        • Contact:
          • SKYLINE-UC Trial Center
      • Békéscsaba, Hungary, H-5600
        • Recruiting
        • Site 654
        • Contact:
          • SKYLINE-UC Trial Center
      • Székesfehérvár, Hungary, H-8000
        • Recruiting
        • Site 652
        • Contact:
          • SKYLINE-UC Trial Center
      • Hyderabad, India, 500032
        • Recruiting
        • Site 270
        • Contact:
          • SKYLINE-UC Trial Center
      • Jaipur, India, 302004
        • Recruiting
        • Site 268
        • Contact:
          • SKYLINE-UC Trial Center
      • Kochi, India, 682040
        • Recruiting
        • Site 266
        • Contact:
          • SKYLINE-UC Trial Center
      • Sūrat, India, 395002
        • Recruiting
        • Site 265
        • Contact:
          • SKYLINE-UC Trial Center
      • Beer Yaaqov, Israel, 7033001
        • Recruiting
        • Site 445
        • Contact:
          • SKYLINE-UC Trial Center
      • Beersheba, Israel, 8410101
        • Recruiting
        • Site 441
        • Contact:
          • SKYLINE-UC Trial Center
      • Haifa, Israel, 31048
        • Recruiting
        • Site 443
        • Contact:
          • SKYLINE-UC Trial Center
      • Jerusalem, Israel, 9103102
        • Recruiting
        • Site 444
        • Contact:
          • SKYLINE-UC Trial Center
      • Jerusalem, Israel, 9112001
        • Recruiting
        • Site 446
        • Contact:
          • SKYLINE-UC Trial Center
      • Nahariya, Israel, 2210001
        • Recruiting
        • Site 442
        • Contact:
          • SKYLINE-UC Trial Center
      • Bologna, Italy, 40138
        • Recruiting
        • Site 683
        • Contact:
          • SKYLINE-UC Trial Center
      • Negrar, Italy, 37024
        • Recruiting
        • Site 672
        • Contact:
          • SKYLINE-UC Trial Center
      • Padova, Italy, 35128
        • Recruiting
        • Site 677
        • Contact:
          • SKYLINE-UC Trial Center
      • Rome, Italy, 00168
        • Recruiting
        • Site 681
        • Contact:
          • SKYLINE-UC Trial Center
      • Turin, Italy, 10128
        • Recruiting
        • Site 675
        • Contact:
          • SKYLINE-UC Trial Center
    • Bari
      • Castellana Grotte, Bari, Italy, 70013
        • Recruiting
        • Site 682
        • Contact:
          • SKYLINE-UC Trial Center
    • Lombardy
      • Pavia, Lombardy, Italy, 27100
        • Recruiting
        • Site 679
        • Contact:
          • SKYLINE-UC Trial Center
    • Milan
      • Legnano, Milan, Italy, 20025
        • Recruiting
        • Site 673
        • Contact:
          • SKYLINE-UC Trial Center
      • Rozzano, Milan, Italy, 20089
        • Recruiting
        • Site 674
      • San Donato Milanese, Milan, Italy, 20097
        • Recruiting
        • Site 676
        • Contact:
          • SKYLINE-UC Trial Center
      • Segrate, Milan, Italy, 20132
        • Recruiting
        • Site 671
        • Contact:
          • SKYLINE-UC Trial Center
    • Piedmont
      • Turin, Piedmont, Italy, 10126
        • Recruiting
        • Site 680
        • Contact:
          • SKYLINE-UC Trial Center
      • Kobe, Japan, 650-0015
        • Recruiting
        • Site 291
        • Contact:
          • SKYLINE-UC Trial Center
      • Saga, Japan, 849-8501
        • Recruiting
        • Site 286
        • Contact:
          • SKYLINE-UC Trial Center
      • Sendai, Japan, 981-3213
        • Recruiting
        • Site 285
        • Contact:
          • SKYLINE-UC Trial Center
      • Urayasu-shi, Japan, 279-0021
        • Recruiting
        • Site 293
        • Contact:
          • SKYLINE-UC Trial Center
    • Chiba
      • Kashiwa, Chiba, Japan, 277-0871
        • Recruiting
        • Site 299
        • Contact:
          • SKYLINE-UC Trial Center
    • Fukuoka
      • Chikushino-shi, Fukuoka, Japan, 818-8502
        • Recruiting
        • Site 294
        • Contact:
          • SKYLINE-UC Trial Center
    • Iwate
      • Shiwa-gun, Iwate, Japan, 028-3695
        • Recruiting
        • Site 292
        • Contact:
          • SKYLINE-UC Trial Center
    • Oita Prefecture
      • Ōita, Oita Prefecture, Japan, 870-0823
        • Recruiting
        • Site 290
        • Contact:
          • SKYLINE-UC Trial Center
    • Osaka
      • Chuo Ku, Osaka, Japan, 540-0006
        • Recruiting
        • Site 282
        • Contact:
          • SKYLINE-UC Trial Center
      • Amman, Jordan, 11196
        • Recruiting
        • Site 424
        • Contact:
          • SKYLINE-UC Trial Center
      • Amman, Jordan, 11942
        • Recruiting
        • Site 421
        • Contact:
          • SKYLINE-UC Trial Center
      • Amman, Jordan, 11194
        • Recruiting
        • Site 425
        • Contact:
          • SKYLINE-UC Trial Center
      • Irbid, Jordan, 21110
        • Recruiting
        • Site 422
        • Contact:
          • SKYLINE-UC Trial Center
      • Irbid, Jordan, 22110
        • Recruiting
        • Site 423
        • Contact:
          • SKYLINE-UC Trial Center
      • Irbid, Jordan, 22110
        • Recruiting
        • Site 426
        • Contact:
          • SKYLINE-UC Trial Center
      • Klaipėda, Lithuania, LT-92288
        • Recruiting
        • Site 704
        • Contact:
          • SKYLINE-UC Trial Center
      • Vilnius, Lithuania, LT-08406
        • Recruiting
        • Site 703
        • Contact:
          • SKYLINE-UC Trial Center
    • Coahuila
      • Saltillo, Coahuila, Mexico, 25050
        • Recruiting
        • Site 174
        • Contact:
          • SKYLINE-UC Trial Center
    • Guanajuato
      • Celaya, Guanajuato, Mexico, 38000
        • Recruiting
        • Site 175
        • Contact:
          • SKYLINE-UC Trial Center
    • Jalisco
      • Tlajomulco de Zúñiga, Jalisco, Mexico, 45645
        • Recruiting
        • Site 173
        • Contact:
          • SKYLINE-UC Trial Center
      • Chisinau, Moldova, MD2025
        • Recruiting
        • Site 711
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Chisinau, Moldova, MD2025
        • Recruiting
        • Site 712
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Chisinau, Moldova, MD2068
        • Recruiting
        • Site 715
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Chisinau, Moldova, MD2005
        • Recruiting
        • Site 713
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Chisinau, Moldova, MD2025
        • Recruiting
        • Site 714
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Bydgoszcz, Poland, 85-794
        • Recruiting
        • Site 732
        • Contact:
          • SKYLINE-UC Trial Center
      • Bydgoszcz, Poland, 85-2299
        • Recruiting
        • Site 753
        • Contact:
          • SKYLINE-UC Trial Center
      • Katowice, Poland, 40-748
        • Recruiting
        • Site 735
        • Contact:
          • SKYLINE-UC Trial Center
      • Katowice, Poland, 40-600
        • Recruiting
        • Site 749
        • Contact:
          • SKYLINE-UC Trial Center
      • Krakow, Poland, 31-501
        • Recruiting
        • Site 748
        • Contact:
          • SKYLINE-UC Trial Center
      • Opole, Poland, 45-819
        • Recruiting
        • Site 743
        • Contact:
          • SKYLINE-UC Trial Center
      • Poznan, Poland, 60-309
        • Recruiting
        • Site 740
        • Contact:
          • SKYLINE-UC Trial Center
      • Rzeszów, Poland, 35-326
        • Recruiting
        • Site 736
        • Contact:
          • SKYLINE-UC Trial Center
      • Sopot, Poland, 81-756
        • Recruiting
        • Site 744
        • Contact:
          • SKYLINE-UC Trial Center
      • Staszów, Poland, 28-2200
        • Recruiting
        • Site 745
        • Contact:
          • SKYLINE-UC Trial Center
      • Szczecin, Poland, 71-685
        • Recruiting
        • Site 733
        • Contact:
          • SKYLINE-UC Trial Center
      • Szczecin, Poland, 71-434
        • Recruiting
        • Site 737
        • Contact:
          • SKYLINE-UC Trial Center
      • Tychy, Poland, 43-100
        • Recruiting
        • Site 752
        • Contact:
          • SKYLINE-UC Trial Center
      • Warsaw, Poland, 57-300
        • Recruiting
        • Site 750
        • Contact:
          • SKYLINE-UC Trial Center
      • Warsaw, Poland, 00--710
        • Recruiting
        • Site 739
        • Contact:
          • SKYLINE-UC Trial Center
      • Warsaw, Poland, 04-501
        • Recruiting
        • Site 731
        • Contact:
          • SKYLINE-UC Trial Center
      • Warsaw, Poland, 02-786
        • Recruiting
        • Site 741
        • Contact:
          • SKYLINE-UC Trial Center
      • Warsaw, Poland, 00-189
        • Recruiting
        • Site 751
        • Contact:
          • SKYLINE-UC Trial Center
      • Warsaw, Poland, 02-172
        • Recruiting
        • Site 754
        • Contact:
          • SKYLINE-UC Trial Center
      • Wroclaw, Poland, 53-149
        • Recruiting
        • Site 734
        • Contact:
          • SKYLINE-UC Trial Center
      • Wroclaw, Poland, 53-611
        • Recruiting
        • Site 747
        • Contact:
          • SKYLINE-UC Trial Center
      • Wroclaw, Poland, 52-416
        • Recruiting
        • Site 738
        • Contact:
          • SKYLINE-UC Trial Center
      • Wroclaw, Poland, 54-239
        • Recruiting
        • Site 742
        • Contact:
          • SKYLINE-UC Trial Center
      • Bucharest, Romania, 014142
        • Recruiting
        • Site 784
        • Contact:
          • SKYLINE-UC Trial Center
      • Bucharest, Romania, 020125
        • Recruiting
        • Site 781
        • Contact:
          • SKYLINE--UC Trial Center
      • Bucharest, Romania, 011273
        • Recruiting
        • Site 783
        • Contact:
          • SKYLINE-UC Trial Center
      • Cluj-Napoca, Romania, 400061
        • Recruiting
        • Site 782
        • Contact:
          • SKYLINE-UC Trial Center
      • Constanța, Romania, 900161
        • Recruiting
        • Site 786
        • Contact:
          • SKYLINE-UC Trial Center
      • Timișoara, Romania, 300239
        • Recruiting
        • Site 788
        • Contact:
          • SKYLINE-UC Trial Center
      • Belgrade, Serbia, 11000
        • Recruiting
        • Site 802
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Belgrade, Serbia, 11000
        • Recruiting
        • Site 807
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Belgrade, Serbia, 11080
        • Recruiting
        • Site 803
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Belgrade, Serbia, 11 000
        • Recruiting
        • Trial Site 804
        • Contact:
          • SKYLINE-UC Trial Center
      • Niš, Serbia, 18 000
        • Recruiting
        • Site 805
        • Contact:
          • SKYLINE-UC Trial Center
      • Užice, Serbia, 31000
        • Recruiting
        • Site 806
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Zrenjanin, Serbia, 23000
        • Recruiting
        • Site 801
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Bratislava, Slovakia, 811 09
        • Recruiting
        • Site 823
        • Contact:
          • SKYLINE-UC Trial Center
      • Košice, Slovakia, 040 13
        • Recruiting
        • Site 822
        • Contact:
          • SKYLINE-UC Trial Center
      • Prešov, Slovakia, 080 01
        • Recruiting
        • Site 821
        • Contact:
          • SKYLINE-UC Trial Center
      • Zvolen, Slovakia, 960 01
        • Recruiting
        • Site 825
        • Contact:
          • SKYLINE-UC Trial Center
      • Busan, South Korea, 48108
        • Recruiting
        • Site 357
        • Contact:
          • SKYLINE-UC Trial Center
      • Daegu, South Korea, 42601
        • Recruiting
        • Site 361
        • Contact:
          • SKYLINE-UC Trial Center
      • Daegu, South Korea, 40404
        • Recruiting
        • Site 354
        • Contact:
          • SKYLINE-UC Trial Center
      • Daegu, South Korea, 42415
        • Recruiting
        • Site 358
        • Contact:
          • SKYLINE-UC Trial Center
      • Daejeon, South Korea, 34943
        • Recruiting
        • Site 355
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Seoul, South Korea, 6351
        • Recruiting
        • Site 362
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Seoul, South Korea, 03722
        • Recruiting
        • Site 351
        • Contact:
          • SKYLINE-UC Trial Center
      • Seoul, South Korea, 03312
        • Recruiting
        • Site 356
        • Contact:
          • SKYLINE-UC Trial Center
      • Seoul, South Korea, 07985
        • Recruiting
        • Site 360
        • Contact:
          • SKYLINE-UC Trial Center
      • Seoul, South Korea, 06591
        • Recruiting
        • Site 352
        • Contact:
          • SKYLINE-UC Trial Center
      • Suwon, South Korea, 16247
        • Recruiting
        • Site 359
        • Contact:
          • SKYLINE-UC Trial Center
      • Wŏnju, South Korea, 26426
        • Recruiting
        • Site 353
        • Contact:
          • SKYLINE-UC Trial Center
      • Gijón, Spain, 33394
        • Recruiting
        • Site 835
        • Contact:
          • SKYLINE-UC Trial Center
      • Lugo, Spain, 27003
        • Recruiting
        • Site 838
        • Contact:
          • SKYLINE-UC Trial Center
      • Madrid, Spain, 28031
        • Recruiting
        • Site 834
        • Contact:
          • SKYLINE-UC Trial Center
      • Madrid, Spain, 28222
        • Recruiting
        • Site 837
        • Contact:
          • SKYLINE-UC Trial Center
      • Ourense, Spain, 32005
        • Recruiting
        • Site 836
        • Contact:
          • SKYLINE-UC Trial Center
      • Seville, Spain, 41013
        • Recruiting
        • Site 831
        • Contact:
          • SKYLINE-UC Trial Center
    • A Coruna
      • Santiago de Compostela, A Coruna, Spain, 15702
        • Recruiting
        • Site 832
        • Contact:
          • SKYLINE-UC Trial Center
      • Basel, Switzerland, 4031
        • Recruiting
        • Site 852
        • Contact:
          • SKYLINE-UC Trial Center
      • Bern, Switzerland, 3012
        • Recruiting
        • Site 853
        • Contact:
          • SKYLINE-UC Trial Center
      • Sankt Gallen, Switzerland, 9007
        • Recruiting
        • Site 851
        • Contact:
          • SKYLINE-UC Trial Center
      • Changhua, Taiwan, 500
        • Recruiting
        • Site 394
        • Contact:
          • SKYLINE-UC Trial Center
      • Chiayi City, Taiwan, 600
        • Recruiting
        • Site 392
        • Contact:
          • SKYLINE-UC Trial Center
      • Kaohsiung City, Taiwan, 833401
        • Recruiting
        • Site 395
        • Contact:
          • SKYLINE-UC Trial Center
      • Taichung, Taiwan, 404327
        • Recruiting
        • Site 396
        • Contact:
          • SKYLINE-UC Trial Center
      • Taipei, Taiwan, 100225
        • Recruiting
        • Site 391
        • Contact:
          • SKYLINE-UC Trial Center
      • Taipei, Taiwan, 104
        • Recruiting
        • Site 397
        • Contact:
          • SKYLINE-UC Trial Center
      • Taoyuan City, Taiwan, 333
        • Recruiting
        • Site 393
        • Contact:
          • SKYLINE-UC Trial Center
      • Kocaeli, Turkey (Türkiye), 41380
        • Recruiting
        • Site 866
        • Contact:
          • SKYLINE-UC Trial Center
      • Mersin, Turkey (Türkiye), 33110
        • Recruiting
        • Site 861
        • Contact:
          • SKYLINE-UC Trial Center
      • Sanliurfa, Turkey (Türkiye), 63290
        • Recruiting
        • Site 865
        • Contact:
          • SKYLINE-UC Trial Center
      • Trabzon, Turkey (Türkiye), 61080
        • Recruiting
        • Site 862
        • Contact:
          • SKYLINE-UC Trial Center
      • Ivano-Frankivsk, Ukraine, 76008
        • Recruiting
        • Site 906
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Kyiv, Ukraine, 04050
        • Recruiting
        • Site 913
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Kyiv, Ukraine, 02091
        • Recruiting
        • Site 904
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Kyiv, Ukraine, 04210
        • Recruiting
        • Site 903
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Kyiv, Ukraine, 04107
        • Recruiting
        • Site 911
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Kyiv, Ukraine, 02002
        • Recruiting
        • Site 902
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Kyiv, Ukraine, 03037
        • Recruiting
        • Site 905
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Lutsk, Ukraine, 43005
        • Recruiting
        • Site 901
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Lviv, Ukraine, 79010
        • Recruiting
        • Site 909
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Lviv, Ukraine, 79059
        • Recruiting
        • Site 912
        • Contact:
          • SKYLINE-UC Trial Center
      • Poltava, Ukraine, 36011
        • Recruiting
        • Site 914
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Vinnytsia, Ukraine, 21009
        • Recruiting
        • Site 908
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Vinnytsia, Ukraine, 21029
        • Recruiting
        • Site 907
        • Contact:
          • SKYLINE-UC
          • Phone Number: Trial Center
      • Vinnytsia, Ukraine, 21028
        • Recruiting
        • Site 910
        • Contact:
          • SKYLINE-UC Trial Center
    • California
      • Canoga Park, California, United States, 91304
        • Recruiting
        • Site 024
        • Contact:
          • SKYLINE-UC Trial Center
      • La Jolla, California, United States, 92037
        • Recruiting
        • Site 023
        • Contact:
          • SKYLINE-UC Trial Center
      • Lancaster, California, United States, 93534
        • Recruiting
        • Site 012
        • Contact:
          • SKYLINE-UC Trial Center
    • Colorado
      • Colorado Springs, Colorado, United States, 91304
        • Recruiting
        • Site 033
        • Contact:
          • SKYLINE-UC Trial Center
    • Florida
      • Kissimmee, Florida, United States, 34741
        • Recruiting
        • Site 007
        • Contact:
          • SKYLINE-UC Trial Center
      • Miami, Florida, United States, 33165
        • Recruiting
        • 029
        • Contact:
          • SKYLINE-UC Trial Center
    • Kansas
      • Kansas City, Kansas, United States, 66160
        • Recruiting
        • Site 006
        • Contact:
          • SKYLINE-UC Trial Center
    • Kentucky
      • Louisville, Kentucky, United States, 40202
        • Recruiting
        • Site 030
        • Contact:
          • SKYLINE-UC Trial Center
    • Louisiana
      • Marrero, Louisiana, United States, 70072
        • Recruiting
        • Site 035
        • Contact:
          • SKYLINE-UC Trial Center
    • Maryland
      • Glen Burnie, Maryland, United States, 21061
        • Recruiting
        • Site 011
        • Contact:
          • SKYLINE-UC Trial Center
    • Massachusetts
      • Boston, Massachusetts, United States, 02114
        • Recruiting
        • Site 003
        • Contact:
          • SKYLINE-UC Trial Center
    • Minnesota
      • Rochester, Minnesota, United States, 55905
        • Recruiting
        • Site 028
        • Contact:
          • SKYLINE-UC Trial Center
    • New York
      • New York, New York, United States, 10065
        • Recruiting
        • Site 037
        • Contact:
          • SKYLINE-UC Trial Center
    • North Carolina
      • Chapel Hill, North Carolina, United States, 27599
        • Recruiting
        • 040
        • Contact:
          • SKYLINE-UC Trial Center
      • Durham, North Carolina, United States, 27710
        • Recruiting
        • Site 041
        • Contact:
          • SKYLINE-UC Trial Center
      • Winston-Salem, North Carolina, United States, 27103
        • Recruiting
        • Site 016
        • Contact:
          • SKYLINE-UC Trial Center
    • Rhode Island
      • Providence, Rhode Island, United States, 02904
        • Recruiting
        • Site 025
        • Contact:
          • SKYLINE- UC Trial Center
    • Tennessee
      • Kingsport, Tennessee, United States, 37663
        • Recruiting
        • Site 017
        • Contact:
          • SKYLINE-UC Trial Center
    • Texas
      • Cedar Park, Texas, United States, 78613
        • Recruiting
        • Site 013
        • Contact:
          • SKYLINE-UC Trial Center
      • Garland, Texas, United States, 75246
        • Recruiting
        • Site 005
        • Contact:
          • SKYLINE-UC Trial Center
      • San Antonio, Texas, United States, 78229
        • Recruiting
        • Site 002
        • Contact:
          • SKYLINE-UC Trial Center
      • Southlake, Texas, United States, 76092
        • Recruiting
        • Site 008
        • Contact:
          • SKYLINE-UC Trial Center
      • Webster, Texas, United States, 77598
        • Recruiting
        • Site 009
        • Contact:
          • SKYLINE-UC Trial Center
    • Washington
      • Seattle, Washington, United States, 98195
        • Recruiting
        • Site 004
        • Contact:
          • SKYLINE-UC Trial Center
      • Tacoma, Washington, United States, 98405
        • Recruiting
        • Site 019
        • Contact:
          • SKYLINE-UC Trial Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Diagnosis of UC for ≥3 months before Day 1, confirmed by endoscopy and histology either previously or during Screening
  • Active UC with disease extent of ≥15 cm from the anal verge, as confirmed by Screening endoscopy (up to approximately 15% allowed to have only proctitis)
  • Moderately to severely active disease as defined by a modified Mayo score of 5-9, rectal bleeding subscore of ≥1, and Mayo endoscopic subscore ≥2

Exclusion Criteria:

  • Current diagnosis of Crohn's disease or Inflammatory Bowel Disease (IBD)-Undefined
  • Confirmed or suspected fulminant colitis, toxic megacolon, bowel perforation and/or other conditions that will likely require surgery during induction
  • Failed 4 or more approved or investigational advanced therapy classes

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Intervention Specific Appendix - SPY001: Part A
Participants will receive open-label dose of SPY001
Experimental
Other Names:
  • SPY001-001
Experimental: Intervention Specific Appendix - SPY002: Part A
Participants will receive open-label dose of SPY002
Experimental
Other Names:
  • SPY002-091
Experimental: Intervention Specific Appendix - SPY003: Part A
Participants will receive open-label dose of SPY003
Experimental
Other Names:
  • SPY003-207
Experimental: Intervention Specific Appendix - SPY001 Dosing Regimen 1: Part B
Participants will receive double-blind dosing regimen 1 of SPY001
Experimental
Other Names:
  • SPY001-001
Experimental: Intervention Specific Appendix - SPY001 Dosing Regimen 2: Part B
Participants will receive double-blind dosing regimen 2 of SPY001
Experimental
Other Names:
  • SPY001-001
Experimental: Intervention Specific Appendix - SPY002 Dosing Regimen 1: Part B
Participants will receive double-blind dosing regimen 1 of SPY002
Experimental
Other Names:
  • SPY002-091
Experimental: Intervention Specific Appendix - SPY002 Dosing Regimen 2: Part B
Participants will receive double-blind dosing regimen 2 of SPY002
Experimental
Other Names:
  • SPY002-091
Experimental: Intervention Specific Appendix - SPY003 Dosing Regimen 1: Part B
Participants will receive double-blind dosing regimen 1 of SPY003
Experimental
Other Names:
  • SPY003-207
Experimental: Intervention Specific Appendix - SPY003 Dosing Regimen 2: Part B
Participants will receive double-blind dosing regimen 2 of SPY003
Experimental
Other Names:
  • SPY003-207
Experimental: Intervention Specific Appendix - SPY120: Part B
Participants will receive double-blind dose of SPY001 and SPY002
Experimental
Other Names:
  • SPY001-001
Experimental
Other Names:
  • SPY002-091
Experimental: Intervention Specific Appendix - SPY130: Part B
Participants will receive double-blind dose of SPY001 and SPY003
Experimental
Other Names:
  • SPY001-001
Experimental
Other Names:
  • SPY003-207
Experimental: Intervention Specific Appendix - SPY230: Part B
Participants will receive double-blind dose of SPY002 and SPY003
Experimental
Other Names:
  • SPY002-091
Experimental
Other Names:
  • SPY003-207
Placebo Comparator: Placebo: Part B
Participants will receive matching placebo
Placebo

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Part A: Change in Robarts Histopathology Index (RHI)
Time Frame: Week 12
Change in Robarts Histopathology Index (RHI) from baseline at Week 12 will be assessed. The RHI is used to quantify and assess histological activity of UC, comprising of scores for inflammatory infiltrates, neutrophils, erosions or ulceration. Scores are assigned to each of these features, with a total ranging from 0 (no disease activity) to 33 (most severe disease activity). Higher score indicates more severe disease.
Week 12
Part B: Percentage of participants with clinical remission
Time Frame: Week 12
Percentage of participants with clinical remission at Week 12 will be assessed. Clinical remission is based on the modified Mayo subscores, which consist of a rectal bleeding subscore (ranging from 0 to 3), stool frequency subscore (ranging from 0 to 3), and endoscopic subscore (ranging from 0 to 3), as assessed by central reading. Higher scores indicate more severe disease.
Week 12

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Part A: Percentage of participants with clinical remission
Time Frame: Week 12
Percentage of participants with clinical remission at Week 12 will be assessed. Clinical remission is based on the modified Mayo subscores, which consist of a rectal bleeding subscore (ranging from 0 to 3), stool frequency subscore (ranging from 0 to 3), and endoscopic subscore (ranging from 0 to 3), as assessed by central reading. Higher scores indicate more severe disease.
Week 12
Part A: Percentage of participants with endoscopic improvement
Time Frame: Week 12
Percentage of participants with endoscopic improvement at Week 12 will be assessed. Endoscopic improvement based on the Mayo endoscopic subscore (ranging from 0 to 3), as assessed by central reading. Higher score indicates more severe disease.
Week 12
Part B: Percentage of participants with endoscopic improvement
Time Frame: Week 12
Percentage of participants with endoscopic improvement at Week 12 will be assessed. Endoscopic improvement based on the Mayo endoscopic subscore (ranging from 0 to 3), as assessed by central reading. Higher score indicates more severe disease.
Week 12
Part B: Percentage of participants with clinical response
Time Frame: Week 12
Percentage of participants with clinical response at Week 12 will be assessed. Clinical response is based on the modified Mayo Score, which consist of a rectal bleeding subscore (ranging from 0 to 3), stool frequency subscore (ranging from 0 to 3), and endoscopic subscore (ranging from 0 to 3), as assessed by central reading. Higher scores indicate more severe disease.
Week 12
Part B: Percentage of participants with histologic improvement
Time Frame: Week 12
Percentage of participants with histologic improvement at Week 12 will be assessed. Histologic improvement is based on the Geboes score. The Geboes histologic index includes 7 histological features (architectural change, chronic inflammatory infiltrate, lamina propria neutrophils and eosinophils, neutrophils in epithelium, crypt destruction and erosion or ulcers). The Geboes score has 6 grades from 0 to 5, with each grade of the score divided into 4 or 5 subcategories; the score ranges from 0.0 to 5.4. Higher score indicates more severe disease.
Week 12
Part B: Percentage of participants achieving histologic endoscopic mucosal improvement (HEMI).
Time Frame: Week 12
Percentage of participants with HEMI at Week 12 will be assessed. Mucosal improvement is based on the Mayo endoscopic subscore and the Geboes score. The Mayo endoscopic subscore ranges from 0 to 3, as assessed by central reading. Higher score indicates more severe disease. The Geboes histologic index includes 7 histological features (architectural change, chronic inflammatory infiltrate, lamina propria neutrophils and eosinophils, neutrophils in epithelium, crypt destruction and erosion or ulcers). The Geboes score has 6 grades from 0 to 5, with each grade of the score divided into 4 or 5 subcategories; the score ranges from 0.0 to 5.4. Higher score indicates more severe disease
Week 12
Part B: Percentage of participants with clinical remission
Time Frame: Week 48
Percentage of participants with clinical remission at Week 48 will be assessed. Clinical remission is based on the modified Mayo subscores, which consist of a rectal bleeding subscore (ranging from 0 to 3), stool frequency subscore (ranging from 0 to 3), and endoscopic subscore (ranging from 0 to 3), as assessed by central reading. Higher scores indicate more severe disease.
Week 48

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Investigators

  • Study Director: SKYLINE-UC Study Director, Spyre Therapeutics

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

May 27, 2025

Primary Completion (Estimated)

June 1, 2026

Study Completion (Estimated)

March 1, 2028

Study Registration Dates

First Submitted

May 27, 2025

First Submitted That Met QC Criteria

June 4, 2025

First Posted (Actual)

June 10, 2025

Study Record Updates

Last Update Posted (Actual)

June 8, 2026

Last Update Submitted That Met QC Criteria

June 4, 2026

Last Verified

June 1, 2026

More Information

Terms related to this study

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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