Leucine-rich alpha-2 glycoprotein is a potential biomarker to monitor disease activity in inflammatory bowel disease receiving adalimumab: PLANET study.

"Declarations Conflict of interestKM reports personal fees from EA Pharma Co., Ltd., Mitsubishi Tanabe Pharma, Takeda Pharmaceutical Co. Ltd., Janssen Pharmaceutical K.K., Abbvie Inc., Mochida Pharmaceutical Co., Ltd., Kissei Pharmaceutical Co., Ltd., Alfressa Pharma Corporation, JIMRO Co., Ltd.; research grant from Janssen Pharmaceutical K.K., outside the submitted work. HT reports personal fees from JIMRO Co., Ltd., AbbVie GK, EA Pharma Co., Ltd., Mochida Pharmaceutical Co., Ltd., Kyorin Pharmaceutical Co., Ltd., outside the submitted work. SK reports personal fees from Abbvie Inc., Mitsubishi Tanabe Pharma Corporation, Janssen Pharmaceutical K.K.; grants from Abbvie Inc., EA Pharma Co., Ltd., outside the submitted work. TTo reports grants from Mitsubishi Tanabe Pharma Corporation, Abbvie Inc., EA Pharma Co., Ltd., outside the submitted work. KW reports grants and personal fees from AbbVie Japan Co., Ltd., EA Pharma Co., Ltd., Mitsubishi Tanabe Pharma Corporation, Takeda Pharmaceutical Co., Ltd., Kyorin Pharmaceutical Co., Ltd., Pfizer Japan Inc., Kissei Pharmaceutical Co., Ltd., outside the submitted work; endowed chair from AbbVie Japan Co., Ltd., EA Pharma Co., Ltd., Mitsubishi Tanabe Pharma Corporation, Kyorin Pharmaceutical Co., Ltd., Zeria Pharmaceutical Co., Ltd., JIMRO Co Ltd., Mochida Pharmaceutical Co., Ltd., Asahi Kasei Medical Co., Ltd., Otsuka Pharma Factory Inc. SNa reports personal fees and endowed chair from Mitsubishi Tanabe Pharma Corporation, Abbvie Inc., EA Pharma Co., Ltd., Janssen Pharmaceutical K.K., Mochida Pharmaceutical Co., Ltd., Takeda Pharmaceutical Co. Ltd., Kyorin Holdings Inc., JIMRO Co Ltd., Zeria Pharmaceutical Co., Ltd.; research grants from Mitsubishi Tanabe Pharma Corporation, Mochida Pharmaceutical Co., Ltd., Takeda Pharmaceutical Co. Ltd., endowed chair from Otsuka Pharma Factory Inc., outside the submitted work. YN reports personal fees from Janssen Pharmaceutical K.K., Mitsubishi Tanabe Pharma Corporation, Mochida Pharmaceutical Co., Ltd., outside the submitted work. TKo reports personal fees from Alfresa Pharma, Mochida Pharmaceutical, Takeda Pharmaceutical, Mitsubishi Tanabe Pharma, Janssen, Abbvie GK, Pfizer; grants from Abbvie GK, EA Pharma, Otsuka Holdings, ZERIA, EA Pharma, Nippon Kayaku, JIMRO, outside the submitted work. AK reports personal fees from Takeda Pharmaceutical Co., Ltd., Astellas Pharma Inc., Daiichisankyo Co., Ltd.; research grants from Takeda Pharmaceutical Co., Ltd., Mochida Pharmaceutical Co., Ltd., AstraZeneca K. K., Daiichisankyo Co., Ltd., outside the submitted work. FH reports personal fees from Abbvie GK, EA Pharma Co., Ltd, Janssen Pharmaceutical K.K, Mochida Pharmaceutical Co., Ltd., Takdeda Pharmaceutical Co., Ltd and Mitsubishi Tanabe Pharma, outside the submitted work. SH reports personal fees from Janssen Pharmaceutical K.K., Mitsubishi Tanabe Pharma Corporation, outside the submitted work. WM reports personal fees from Mitsubishi Tanabe Pharma Corporation, Takeda Pharmaceutical Co., Ltd., Zeria Pharmaceutical Co., Ltd., Pfizer Japan Inc., Janssen Pharmaceutical K.K., Gilead Sciences, Inc., EA Pharma Co., Ltd.; research grants from Alfresa Pharma Corporation.; scholarship grants from Abbvie GK., Mitsubishi Tanabe Pharma Corporation, Takeda Pharmaceutical Co., Ltd., Zeria Pharmaceutical Co., Ltd., Astellas Pharma Inc., Taiho Pharmaceutical Co., Ltd., Nippon Kayaku Co., Ltd., Mochida Pharmaceutical Co., Ltd., Miyarisan Pharmaceutical Co., Ltd., Kyorin Pharmaceutical Co., Ltd., EA Pharma Co., Ltd., Kissei Pharmaceutical Co., Ltd., Alfresa Pharma Corporation., outside the submitted work. MM reports personal fees from Janssen Pharmaceutical K.K. and grants from Nippon Kayaku Co., Ltd., outside the submitted work. SNi is an employee of Eisai Co. Ltd. TTa reports personal fees from Abbvie GK, and grants from Abbvie GK, EA Pharma Co., Ltd, Eisai Co., Ltd., outside the submitted work. TN reports grants from Sekisui Medical Co., Ltd., outside the submitted work. TKa reports research grants from Miyarisan Pharmaceutical Co., Ltd., Ezaki Glico Co., Ltd.; scholarship grants from Abbvie GK, Mochida Pharmaceutical Co., Ltd., Kyorin Pharmaceutical Co., Ltd., Taiho Pharmaceutical Co., Ltd., Daiichisankyo Co., Ltd., Mitsubishi Tanabe Pharma, Takeda Pharmaceutical Company Ltd, JIMRO Co., Ltd., outside the submitted work. TM reports personal fees from Abbvie GK, EA Pharma Co., Ltd, Mitsubishi Tanabe Pharma, Takeda Pharmaceutical Co. Ltd.; grants from Mitsubishi Tanabe Pharma, Nippon Kayaku Co., Ltd., outside the submitted work. The other authors have no conflict of interest to disclose. Kochi University is a Patent holder for LRG. Ethical approvalThis study was conducted in accordance with the latest version of the declaration of Helsinki. This study was approved by the Institutional Review Board or the Ethical Committee at each institution. Informed consentWritten informed consent was obtained from all patients. Conflict of interest KM reports personal fees from EA Pharma Co., Ltd., Mitsubishi Tanabe Pharma, Takeda Pharmaceutical Co. Ltd., Janssen Pharmaceutical K.K., Abbvie Inc., Mochida Pharmaceutical Co., Ltd., Kissei Pharmaceutical Co., Ltd., Alfressa Pharma Corporation, JIMRO Co., Ltd.; research grant from Janssen Pharmaceutical K.K., outside the submitted work. HT reports personal fees from JIMRO Co., Ltd., AbbVie GK, EA Pharma Co., Ltd., Mochida Pharmaceutical Co., Ltd., Kyorin Pharmaceutical Co., Ltd., outside the submitted work. SK reports personal fees from Abbvie Inc., Mitsubishi Tanabe Pharma Corporation, Janssen Pharmaceutical K.K.; grants from Abbvie Inc., EA Pharma Co., Ltd., outside the submitted work. TTo reports grants from Mitsubishi Tanabe Pharma Corporation, Abbvie Inc., EA Pharma Co., Ltd., outside the submitted work. KW reports grants and personal fees from AbbVie Japan Co., Ltd., EA Pharma Co., Ltd., Mitsubishi Tanabe Pharma Corporation, Takeda Pharmaceutical Co., Ltd., Kyorin Pharmaceutical Co., Ltd., Pfizer Japan Inc., Kissei Pharmaceutical Co., Ltd., outside the submitted work; endowed chair from AbbVie Japan Co., Ltd., EA Pharma Co., Ltd., Mitsubishi Tanabe Pharma Corporation, Kyorin Pharmaceutical Co., Ltd., Zeria Pharmaceutical Co., Ltd., JIMRO Co Ltd., Mochida Pharmaceutical Co., Ltd., Asahi Kasei Medical Co., Ltd., Otsuka Pharma Factory Inc. SNa reports personal fees and endowed chair from Mitsubishi Tanabe Pharma Corporation, Abbvie Inc., EA Pharma Co., Ltd., Janssen Pharmaceutical K.K., Mochida Pharmaceutical Co., Ltd., Takeda Pharmaceutical Co. Ltd., Kyorin Holdings Inc., JIMRO Co Ltd., Zeria Pharmaceutical Co., Ltd.; research grants from Mitsubishi Tanabe Pharma Corporation, Mochida Pharmaceutical Co., Ltd., Takeda Pharmaceutical Co. Ltd., endowed chair from Otsuka Pharma Factory Inc., outside the submitted work. YN reports personal fees from Janssen Pharmaceutical K.K., Mitsubishi Tanabe Pharma Corporation, Mochida Pharmaceutical Co., Ltd., outside the submitted work. TKo reports personal fees from Alfresa Pharma, Mochida Pharmaceutical, Takeda Pharmaceutical, Mitsubishi Tanabe Pharma, Janssen, Abbvie GK, Pfizer; grants from Abbvie GK, EA Pharma, Otsuka Holdings, ZERIA, EA Pharma, Nippon Kayaku, JIMRO, outside the submitted work. AK reports personal fees from Takeda Pharmaceutical Co., Ltd., Astellas Pharma Inc., Daiichisankyo Co., Ltd.; research grants from Takeda Pharmaceutical Co., Ltd., Mochida Pharmaceutical Co., Ltd., AstraZeneca K. K., Daiichisankyo Co., Ltd., outside the submitted work. FH reports personal fees from Abbvie GK, EA Pharma Co., Ltd, Janssen Pharmaceutical K.K, Mochida Pharmaceutical Co., Ltd., Takdeda Pharmaceutical Co., Ltd and Mitsubishi Tanabe Pharma, outside the submitted work. SH reports personal fees from Janssen Pharmaceutical K.K., Mitsubishi Tanabe Pharma Corporation, outside the submitted work. WM reports personal fees from Mitsubishi Tanabe Pharma Corporation, Takeda Pharmaceutical Co., Ltd., Zeria Pharmaceutical Co., Ltd., Pfizer Japan Inc., Janssen Pharmaceutical K.K., Gilead Sciences, Inc., EA Pharma Co., Ltd.; research grants from Alfresa Pharma Corporation.; scholarship grants from Abbvie GK., Mitsubishi Tanabe Pharma Corporation, Takeda Pharmaceutical Co., Ltd., Zeria Pharmaceutical Co., Ltd., Astellas Pharma Inc., Taiho Pharmaceutical Co., Ltd., Nippon Kayaku Co., Ltd., Mochida Pharmaceutical Co., Ltd., Miyarisan Pharmaceutical Co., Ltd., Kyorin Pharmaceutical Co., Ltd., EA Pharma Co., Ltd., Kissei Pharmaceutical Co., Ltd., Alfresa Pharma Corporation., outside the submitted work. MM reports personal fees from Janssen Pharmaceutical K.K. and grants from Nippon Kayaku Co., Ltd., outside the submitted work. SNi is an employee of Eisai Co. Ltd. TTa reports personal fees from Abbvie GK, and grants from Abbvie GK, EA Pharma Co., Ltd, Eisai Co., Ltd., outside the submitted work. TN reports grants from Sekisui Medical Co., Ltd., outside the submitted work. TKa reports research grants from Miyarisan Pharmaceutical Co., Ltd., Ezaki Glico Co., Ltd.; scholarship grants from Abbvie GK, Mochida Pharmaceutical Co., Ltd., Kyorin Pharmaceutical Co., Ltd., Taiho Pharmaceutical Co., Ltd., Daiichisankyo Co., Ltd., Mitsubishi Tanabe Pharma, Takeda Pharmaceutical Company Ltd, JIMRO Co., Ltd., outside the submitted work. TM reports personal fees from Abbvie GK, EA Pharma Co., Ltd, Mitsubishi Tanabe Pharma, Takeda Pharmaceutical Co. Ltd.; grants from Mitsubishi Tanabe Pharma, Nippon Kayaku Co., Ltd., outside the submitted work. The other authors have no conflict of interest to disclose. Kochi University is a Patent holder for LRG."

"Funding This study was supported by Eisai Co., Ltd. (Tokyo, Japan). Eisai Co., Ltd. was not involved in the study design, data collection, or interpretation of data. Statistical analysis was performed by RPM Co. Ltd. (Tokyo, Japan)."

"This multicenter prospective observational study was conducted between January 2016 and March 2018 at 20 institutions throughout Japan. This study was registered with the University hospital Medical Information Network (UMIN000019958)."