ACR Meeting Abstracts

ACR Meeting Abstracts

Abstract Number: 1907

Safety, Pharmacokinetics, and Efficacy of E6011, an Anti-Fractalkine Monoclonal Antibody, in a First-in-Patient Phase 1/2 Study on Rheumatoid Arthritis: 52-Week Results

Yoshiya Tanaka1, Tsutomu Takeuchi2, Hisanori Umehara3, Toshihiro Nanki4, Nobuyuki Yasuda5, Fumitoshi Tago6, Makoto Kawakubo6, Yasumi Kitahara6, Seiichiro Hojo6, Tetsu Kawano7 and Toshio Imai7, 1The First Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan, 2Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Japan, 3Division of Rheumatology and Immunology, Nagahama City Hospital, Shiga, Japan, 4Division of Rheumatology, Department of Internal Medicine, Toho University School of Medicine, Tokyo, Japan, 5KAN Research Institute, Inc., Tokyo, Japan, 6Eisai Co., Ltd., Tokyo, Japan, 7KAN Research Institute, Inc., Kobe, Japan

Meeting: 2017 ACR/ARHP Annual Meeting

Date of first publication: September 18, 2017

Keywords: , ,

Session Information

Date: Monday, November 6, 2017

Session Title: Rheumatoid Arthritis – Small Molecules, Biologics and Gene Therapy II: Trials Therapy

Session Type: ACR Concurrent Abstract Session

Session Time: 4:30PM-6:00PM

Background/Purpose: Fractalkine (CX3CL1/FKN) is a chemokine that regulates chemotaxis and adhesion of CX3C chemokine receptor 1 (CX3CR1)-expressing inflammatory cells. We previously presented the interim results of a 12-week treatment phase during phase 1/2, open-label, multiple ascending dose clinical trial of E6011, a novel humanized anti-FKN monoclonal antibody, in Japanese active rheumatoid arthritis (RA) patients1.  This is the first report of the 52-week safety, pharmacokinetics and efficacy of this clinical trial (NCT02196558).

Methods: Japanese patients with active RA who have shown inadequate responses or intolerance to methotrexate (MTX) or TNF inhibitor received E6011 at week 0, 1, 2, and then every 2 weeks for up to week 10 during the Treatment Phase. If no safety concerns were raised, subjects who showed a ≥ 20% improvement in both tender and swollen joint counts were given the option to receive 20 additional biweekly administrations at the same dose in the Extension Phase; 52 weeks in total.

Results: Twelve, 15, and 10 subjects were enrolled in the 100, 200, and 400 mg cohorts, respectively. Of these subjects, a total of 28 subjects were entered in the Extension Phase with 11, 11 and 6 subjects in the 100, 200, and 400 mg cohorts, respectively. As a result, repeated dose of E6011 was found safe and well tolerated during the Extension Phase. The incidence of AE, treatment‑related AE and SAE was 83.8%, 48.6% and 13.5%, respectively. There were no severe AE or deaths, and no significant differences were observed in the incidence or severity of AE across the cohorts. After starting multiple dose administration of E6011, the steady state was achieved at week 2, and was held up to week 52. ACR 20 response rates at Week 12 and 52 (LOCF) were 75.0% and 58.3%, 80.0% and 73.3%, and 70.0% and 60.0% in the 100, 200, and 400 mg cohort respectively.

 

Conclusion: E6011 was safe and well tolerated, and demonstrated durable efficacy for 52-week in active RA with an inadequate response or intolerance to MTX or TNF inhibitor therapies. These results support the continuation of E6011 clinical study in phase 2 trials during which an optimal clinical dose and further safety and efficacy thresholds should be confirmed in a placebo controlled double-blinded manner.

Reference:

1. 2015 ACR/ARHP Annual Meeting. Abstract Number: 13L

Disclosure: Y. Tanaka, Daiichi-Sankyo, Astellas, Pfizer, Mitsubishi-Tanabe, Bristol-Myers, Chugai, YL Biologics, Eli Lilly, Sanofi, Janssen, UCB, 8,Mitsubishi-Tanabe, Takeda, Bristol-Myers, Chugai, Astellas, Abbvie, MSD, Daiichi-Sankyo, Pfizer, Kyowa-Kirin, Eisai, Ono, 2; T. Takeuchi, Astellas Pharma Inc, Bristol–Myers K.K., Chugai Pharmaceutical Co, Ltd., Daiichi Sankyo Co., Ltd., Takeda Pharmaceutical Co., Ltd., Teijin Pharma Ltd., AbbVie GK, Asahikasei Pharma Corp., Mitsubishi Tanabe Pharma Co., Pfizer Japan Inc.,and Taisho Toyama P, 2,AbbVie GK., Bristol–Myers K.K., Chugai Pharmaceutical Co,. Ltd., Mitsubishi Tanabe Pharma Co., Pfizer Japan Inc., and Astellas Pharma Inc, and Diaichi Sankyo Co.,Ltd., 8,Astra Zeneca K.K., Eli Lilly Japan K.K., Novartis Pharma K.K., Mitsubishi Tanabe Pharma Co., Abbivie GK, Nipponkayaku Co.Ltd, Janssen Pharmaceutical K.K., Astellas Pharma Inc,. Taiho Pharmaceutical Co., Ltd., 5; H. Umehara, None; T. Nanki, Eisai, Eli Lilly, Bristol-Myers, Ono, Novartis, 2,UCB, Eisai, Chugai, 5,Mitsubishi-Tanabe, Eisai, Astellas, Janssen, AbbVie, Pfizer, UCB, Ayumi, 8; N. Yasuda, KAN Research Institute, 3; F. Tago, Eisai, 3; M. Kawakubo, Eisai, 3,Eisai, 1; Y. Kitahara, Eisai, 1,Eisai, 3; S. Hojo, Eisai, 3; T. Kawano, KAN Research Institute, 3; T. Imai, KAN Research Institute, 3.

To cite this abstract in AMA style:

Tanaka Y, Takeuchi T, Umehara H, Nanki T, Yasuda N, Tago F, Kawakubo M, Kitahara Y, Hojo S, Kawano T, Imai T. Safety, Pharmacokinetics, and Efficacy of E6011, an Anti-Fractalkine Monoclonal Antibody, in a First-in-Patient Phase 1/2 Study on Rheumatoid Arthritis: 52-Week Results [abstract]. Arthritis Rheumatol. 2017; 69 (suppl 10). https://acrabstracts.org/abstract/safety-pharmacokinetics-and-efficacy-of-e6011-an-anti-fractalkine-monoclonal-antibody-in-a-first-in-patient-phase-12-study-on-rheumatoid-arthritis-52-week-results/. Accessed October 22, 2020.

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