Simtuzumab

Last updated November 25, 2025

Simtuzumab
Monoclonal antibody
Type	Whole antibody
Source	Humanized
Target	LOXL2
Clinical data
ATC code	none
Identifiers
CAS Number	1318075-13-6
IUPHAR/BPS	8412
ChemSpider	none
UNII	11Z5AIU653
Chemical and physical data
Formula	C₆₅₅₈H₁₀₁₃₄N₁₇₃₆O₂₀₃₇S₅₀
Molar mass	147492.33 g·mol⁻¹

Simtuzumab (INN; formerly GS 6624) is a humanized monoclonal antibody designed for the treatment of fibrosis.^[1] It binds to LOXL2 and acts as an immunomodulator.^[2] In January 2016, Gilead Sciences terminated its Phase 2 clinical study in patients with idiopathic pulmonary fibrosis (IPF) due to lack of efficacy.^[3]^[4]

References

↑ Statement On A Nonproprietary Name Adopted By The USAN Council - Simtuzumab, American Medical Association .
↑ World Health Organization (2012). "International Nonproprietary Names for Pharmaceutical Substances (INN). Proposed INN: List 107" (PDF). WHO Drug Information. 26 (2).
↑ "Gilead Terminates Phase 2 Study of Simtuzumab in Patients With Idiopathic Pulmonary Fibrosis". Gilead. 5 January 2016.
↑ Chen W, Yang A, Jia J, Popov YV, Schuppan D, You H (August 2020). "Lysyl Oxidase (LOX) Family Members: Rationale and Their Potential as Therapeutic Targets for Liver Fibrosis". Hepatology. 72 (2): 729–741. doi:10.1002/hep.31236. PMID 32176358.

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Monoclonal antibodies for tumors

Tumor

Human	Adecatumumab ^§ Amivantamab Ascrinvacumab ^§ Balstilimab ^† Botensilimab Cixutumumab ^§ Conatumumab ^§ Cosibelimab Daratumumab Drozitumab ^§ Duligotumab ^§ Dusigitumab ^§ Enfortumab vedotin Enoticumab ^§ Figitumumab ^§ Flanvotumab ^§ Ganitumab ^† Glembatumumab vedotin ^† Intetumumab ^§ Ipilimumab Iratumumab ^§ Istiratumab Icrucumab ^§ Lexatumumab ^§ Linvoseltamab Lucatumumab ^§ Mapatumumab ^§ Narnatumab ^§ Necitumumab Nesvacumab ^§ Nivolumab ^# (+hyaluronidase, +relatlimab) Ofatumumab Olaratumab ^† Panitumumab Patritumab ^§ Pritumumab ^§ Radretumab ^§ Ramucirumab Rilotumumab ^† Robatumumab ^§ Seribantumab ^§ Sugemalimab Tarextumab ^§ Tisotumab vedotin Teprotumumab ^† Tovetumab ^§ Vantictumab ^§ Votumumab ^§ Zalutumumab ^†
Mouse	Abagovomab Altumomab pentetate Anatumomab mafenatox Arcitumomab Bectumomab Blinatumomab Capromab pendetide Detumomab Edrecolomab Ibritumomab tiuxetan Igovomab Lilotomab Minretumomab Mitumomab Nacolomab tafenatox Moxetumomab pasudotox Naptumomab estafenatox Oregovomab Pemtumomab ^† Racotumomab Satumomab pendetide Solitomab Taplitumomab paptox Nofetumomab merpentan Pintumomab Tenatumomab Tositumomab
Chimeric	Amatuximab ^§ Bavituximab ^§ Brentuximab vedotin Carotuximab ^† Cetuximab Derlotuximab biotin ^§ Dinutuximab Ecromeximab ^§ Ensituximab ^§ Futuximab ^§ Girentuximab ^† Indatuximab ravtansine ^§ Isatuximab Loncastuximab tesirine Margetuximab Mirvetuximab soravtansine Rituximab ^# Siltuximab Ublituximab Zolbetuximab
Humanized	Abituzumab ^§ Alemtuzumab Atezolizumab (+hyaluronidase) Axatilimab Belantamab mafodotin Bevacizumab Bivatuzumab mertansine ^§ Brontictuzumab ^§ Cantuzumab mertansine ^§ Cantuzumab ravtansine ^§ Cirmtuzumab Citatuzumab bogatox ^§ Clivatuzumab tetraxetan Cofetuzumab pelidotin Dacetuzumab ^§ Demcizumab ^§ Dalotuzumab ^§ Datopotamab deruxtecan Denintuzumab mafodotin ^§ Elotuzumab Emactuzumab Emibetuzumab ^§ Enoblituzumab ^§ Epcoritamab Etaracizumab ^§ Farletuzumab ^§ Ficlatuzumab ^§ Flotetuzumab ^§ Gemtuzumab ozogamicin Glofitamab Imgatuzumab ^§ Inotuzumab ozogamicin Labetuzumab ^§ Lifastuzumab vedotin ^§ Lintuzumab ^§ Lorvotuzumab mertansine ^§ Lumretuzumab ^§ Matuzumab ^§ Milatuzumab ^§ Naxitamab Nimotuzumab ^† Obinutuzumab Ocaratuzumab ^§ Odronextamab Otlertuzumab ^§ Onartuzumab ^§ Oportuzumab monatox ^† Parsatuzumab ^§ Pembrolizumab ^# (+berahyaluronidase alfa) Penpulimab Pertuzumab Pinatuzumab vedotin ^§ Polatuzumab vedotin Rosmantuzumab Rovalpituzumab tesirine ^† Sacituzumab govitecan Sibrotuzumab ^§ Simtuzumab ^§ Sofituzumab vedotin ^§ Tacatuzumab tetraxetan ^§ Tigatuzumab ^§ Trastuzumab ^# (+deruxtecan / +emtansine) Tucotuzumab celmoleukin ^§ Vandortuzumab vedotin ^§ Vanucizumab ^§ Veltuzumab ^§ Vorsetuzumab mafodotin ^§ Zenocutuzumab
Rat/mouse hybrid	Catumaxomab Ertumaxomab ^§
Chimeric + humanized	Depatuxizumab mafodotin ^† Duvortuxizumab Ontuxizumab ^§

^# WHO-EM
^‡ Withdrawn from market
Clinical trials:
- ^† Phase III
- ^§Never to phase III

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