Abstract
The unique genetic, environmental and medical backgrounds of people in Japan might influence the effectiveness and safety of biologic agents in patients with rheumatoid arthritis (RA). Indeed, clinical trials revealed higher response rates to some biologic agents (including infliximab, etanercept and tocilizumab) in patients with RA in Japan than patients treated with the same agents in Western countries, although response rates to adalimumab were comparable in both populations. The reasons why response rates to some biologic agents differ in Japanese individuals is currently under investigation. Post-marketing surveillance data have been collected for all patients with RA who were treated with biologic agents in Japan to monitor drug safety. These data clearly demonstrated that only ∼5% of these patients experienced adverse drug reactions to biologic agents, which were well tolerated. Pneumonia, tuberculosis, Pneumocystis jirovecii pneumonia and interstitial pneumonitis are considered important severe adverse reactions and risk factors for these adverse effects have been identified. Adverse drug reactions could exaggerate the risks associated with biologic therapy in Japanese patients with RA. Attempts have, therefore, been made to predict clinical response and adverse effects to enable personalized therapy with biologic agents and to optimize the outcomes of these patients.
Key Points
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The effectiveness and safety of biologic agents in Japanese patients with rheumatoid arthritis (RA) could be influenced by the unique genetic, environmental and medical backgrounds of these individuals
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Japanese patients with RA with highly active disease and rapid progression of structural joint damage have favorable clinical responses (including retardation of joint destruction) when treated with biologic agents
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Post-marketing surveillance data for all patients with RA treated with biologic agents in Japan demonstrated a low incidence of adverse reactions (∼5%)
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In Japanese patients, important adverse reactions to biologic agents include pneumonia, tuberculosis, Pneumocystis jirovecii pneumonia and interstitial pneumonitis
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Identification of predictive markers could facilitate personalized therapy with biologic agents and optimize the outcomes of patients with RA
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T. Takeuchi has received honoraria from Abbott, Bristol-Myers-Squibb, Chugai Pharmaceutical, Eisai Pharmaceuticals, Janssen Pharmaceutica, Mitsubishi Tanabe Pharma, Novartis, Takeda Pharmaceuticals and Wyeth Japan and research grants from Chugai Pharmaceutical, Eisai Pharmaceuticals, Mitsubishi Tanabe Pharma, Takeda Pharmaceuticals and Wyeth Japan. H. Kameda has received honoraria from Abbott, Centocor Ortho Biotech, Chugai Pharmaceutical, Eisai Pharmaceuticals, Mitsubishi Tanabe Pharma, Takeda Pharmaceuticals and Wyeth Japan.
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Takeuchi, T., Kameda, H. The Japanese experience with biologic therapies for rheumatoid arthritis. Nat Rev Rheumatol 6, 644–652 (2010). https://doi.org/10.1038/nrrheum.2010.154
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DOI: https://doi.org/10.1038/nrrheum.2010.154
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