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Copyright ©The Author(s) 2026. Published by Baishideng Publishing Group Inc. All rights reserved.
World J Gastroenterol. Jan 21, 2026; 32(3): 114677
Published online Jan 21, 2026. doi: 10.3748/wjg.v32.i3.114677
Role of leucine-rich α-2-glycoprotein in Taiwanese patients with inflammatory bowel disease as a predictive biomarker for endoscopic activity
Yun-Chu Chen, Meng-Tzu Weng, Feng-Pai Tsai, Zhi-Che Chen, Hsin-Yun Wu, Chien-Chih Tung, Chun-Ying Wang, Shu-Chen Wei
Yun-Chu Chen, Meng-Tzu Weng, Feng-Pai Tsai, Zhi-Che Chen, Hsin-Yun Wu, Shu-Chen Wei, Department of Internal Medicine, National Taiwan University Hospital, Taipei 100, Taiwan
Meng-Tzu Weng, Chun-Ying Wang, Department of Medical Research, National Taiwan University Hospital Hsin-Chu Branch, Hsinchu 300, Taiwan
Feng-Pai Tsai, Department of Medicine, National Taiwan University Cancer Center, Taipei 106, Taiwan
Zhi-Che Chen, Hsin-Yun Wu, Department of Internal Medicine, National Taiwan University Hospital Jin-Shan Branch, New Taipei City 208, Taiwan
Chien-Chih Tung, Department of Integrated Diagnostics and Therapeutics, National Taiwan University Hospital, Taipei 100, Taiwan
Author contributions: Chen YC, Tsai FP, and Wei SC contributed to the conceptualization; Chen YC, Chen ZC, and Wu HY contributed to data curation; Chen YC and Wang CY contributed to formal analysis; Tsai FP, Tung CC, and Wei SC contributed to investigation; Weng MT, Tung CC, and Wei SC contributed to resources; Chen YC, Weng MT, Wu HY, and Wei SC contributed to supervision; Chen YC wrote the original draft; Weng MT, Chen ZC, Wu HY, and Wei SC contributed to writing - review & editing.
Supported by the National Science and Technology Council of Taiwan, No. MOST 111-2314-B-002-188-MY3; and the Liver Disease Prevention and Treatment Research Foundation.
Institutional review board statement: This study was approved by the Institutional Review Board of National Taiwan University Hospital (approval No. 202112116RINC).
Clinical trial registration statement: This study is not a clinical trial.
Informed consent statement: This prospective study was conducted in accordance with the ethical principles for medical research involving human patients outlined in the Declaration of Helsinki, which was updated in 2013. Written informed consent was obtained from all participants before enrollment.
Conflict-of-interest statement: Wei SC received research grants from the National Science and Technology Council of Taiwan (No. MOST 111-2314-B-002-188-MY3), National Taiwan University Hospital (No. MS 507) and the Liver Disease Prevention and Treatment Research Foundation to support this study.
CONSORT 2010 statement: The authors have read the CONSORT 2010 Statement, and the manuscript was prepared and revised according to the CONSORT 2010 Statement.
Data sharing statement: The technical appendix, statistical code, and dataset that support the findings of this study are available from the corresponding author upon reasonable request.
Open Access: This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: https://creativecommons.org/Licenses/by-nc/4.0/
Corresponding author: Shu-Chen Wei, MD, PhD, Professor, Department of Internal Medicine, National Taiwan University Hospital, No. 7 Chungshan South Road, Taipei 100, Taiwan. shuchenwei@ntu.edu.tw
Received: September 26, 2025
Revised: October 24, 2025
Accepted: December 2, 2025
Published online: January 21, 2026
Processing time: 113 Days and 8.6 Hours
Core Tip

Core Tip: Endoscopy and fecal calprotectin (FC) are standard tools for assessing disease activity in inflammatory bowel disease (IBD) but both have limitations. We evaluated serum leucine-rich α-2-glycoprotein (LRG) as a noninvasive biomarker in a Taiwanese IBD cohort. LRG correlated with FC, C-reactive protein (CRP), hemoglobin, and albumin. In ulcerative colitis, LRG predicted endoscopic activity, particularly in patients with normal CRP levels. Combining CRP, hemoglobin, and LRG significantly improved the endoscopic activity prediction to nearly that of FC. Our findings support the clinical utility of LRG as a complementary biomarker for disease monitoring in IBD, particularly in ulcerative colitis with low CRP.