Intestinal Research

IBD

A real-world comparison of subcutaneous to intravenous administration of infliximab in patients with inflammatory bowel disease: Kwang Woo Kim, Hyoun Woo Kang, Seong-Joon Koh, Hyuk Yoon, Sihyun Kim, Yukyung Jun, Hyun Jung Lee, Jong Pil Im, Young Soo Park, Ji Won Kim, Joo Sung Kim, Seoul National University Inflammatory Bowel Disease Research Network (SIRN); Intest Res 2025;23(4):483-490. Published online June 23, 2025; DOI: https://doi.org/10.5217/ir.2025.00001

Abstract PDF Supplementary Material PubReader ePub: Background/Aims
We compared intravenous and subcutaneous infliximab (IFX) as treatment for inflammatory bowel disease (IBD).
Methods
This retrospective, multicenter, observational study enrolled patients treated with either intravenous or subcutaneous IFX. Sequential parameters were compared at baseline, 6 months, and 12 months following the initiation of treatment with either type of IFX. The primary outcome was the comparison of the IFX trough levels after 12 months of treatment.
Results
In total, 183 participants were included in this study. After 6 months, the subcutaneous group exhibited significant differences compared to the intravenous group; in terms of clinical disease activity (0% vs. 15%, P= 0.007) and IFX trough level (21.72 ± 8.71 μg/mL vs. 7.70 ± 16.65 μg/mL, P= 0.002). After 12 months, subcutaneous, as compared to intravenous, achieved improved clinical disease activity (0% vs. 15%, P= 0.044) and IFX trough level (20.41 ± 12.91 μg/mL vs. 7.06 ± 6.81 μg/mL, P< 0.001). Analyzing the sequential changes compared with baseline data within each group, we observed significant alterations in subcutaneous; 6 months fecal calprotectin (676.3 ± 976.6 μg/g vs. 253.9 ± 483.9 μg/g, P= 0.014), 6 months IFX trough level (7.00 ± 5.67 μg/mL vs. 18.44 ± 6.34 μg/mL, P= 0.026), and 12 months IFX trough level (7.00 ± 5.67 μg/mL vs. 21.33 ± 4.50 μg/mL, P= 0.034).
Conclusions
This study indicates the potential suitability of subcutaneous IFX as an alternative treatment option for IBD.

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Tumor

The impact of COVID-19 on clinical practices of colorectal cancer in South Korea: Kwang Woo Kim, Hyoun Woo Kang; Intest Res 2025;23(1):6-7. Published online January 24, 2025; DOI: https://doi.org/10.5217/ir.2025.00005

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IBD

Predictors of histologic remission in patients with biologic-naïve, moderate-to-severe ulcerative colitis treated with first-line biologic agents and small-molecule drugs: a single-center, retrospective cohort study: Kijae Jo, Kwang Woo Kim, Hyun Jung Lee, Jong Pil Im, Joo Sung Kim, Seong-Joon Koh; Intest Res 2024;22(4):453-463. Published online May 22, 2024; DOI: https://doi.org/10.5217/ir.2024.00044

Abstract PDF PubReader ePub: Background/Aims
The prevalence and incidence of ulcerative colitis (UC) in Korea is increasing. Each patient has a different disease course and treatment response. Recently, with the development of biologic agents, histological remission has become a treatment goal. In this study, we aimed to identify the predictors of histological remission after first-line biologic agent treatment in patients with biologic agent-naïve UC.
Methods
We retrospectively analyzed the medical records of 92 patients who had been diagnosed with UC and treated with first-line biologic agent treatment at our center, between 2015 and 2022. The clinical characteristics, laboratory test results, and endoscopic and biopsy findings were analyzed. Histological remission was defined as the absence of cryptitis, crypt abscesses, and inflammatory cells on histology. Univariate and multivariate logistic regression analyses were performed to identify the predictors of histological remission after first-line treatment.
Results
Of the total 92 patients, 25 (27.2%) achieved histological remission. Each cohort had a varied body mass index (BMI) distribution, with a statistically significant overweight ratio, as defined by the Asian-Pacific BMI category of 23–25 kg/m², of 48.0% in the histological remission cohort (P= 0.026). A causal correlation between the overweight category and histological remission was confirmed (odds ratio, 3.883; 95% confidence interval, 1.141–13.212; P= 0.030).
Conclusions
We confirmed that the overweight category was a predictor of histological remission after first-line treatment with a biological agent. However, as BMI does not account for skeletal muscle mass, future studies are required to confirm the correlation between skeletal muscle mass and histological remission.

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IBD

Regional variations in the prevalence of primary sclerosing cholangitis associated with inflammatory bowel disease: Kwang Woo Kim, Hyoun Woo Kang; Intest Res 2023;21(4):413-414. Published online October 26, 2023; DOI: https://doi.org/10.5217/ir.2023.00133

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Citations

Citations to this article as recorded by

Incidence and risk factors of hepatocellular carcinoma in patients with autoimmune hepatitis in Asia
Jiwon Yang, Sun Young Yim, Kunhee Kim, Hye Won Lee, Jonggi Choi
JHEP Reports.2025; 7(10): 101524. CrossRef
Prevalence and risk factors of gallstone disease in Korean patients with ulcerative colitis
Kwangwoo Nam, Jae Yong Lee, Sang Hyoung Park, Ha Won Hwang, Ho-Su Lee, Kyunghwan Oh, Hee Seung Hong, Kyuwon Kim, Jin Hwa Park, Seung Wook Hong, Sung Wook Hwang, Dong-Hoon Yang, Byong Duk Ye, Jeong-Sik Byeon, Seung-Jae Myung, Suk-Kyun Yang
Intestinal Research.2025; 23(4): 455. CrossRef
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Intestinal Research.2025; 23(4): 430. CrossRef
Halitosis: an underestimated but important extraintestinal manifestation in inflammatory bowel disease
Xiao Xian Qian
Intestinal Research.2024; 22(3): 387. CrossRef

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IBD

Concomitant ankylosing spondylitis can increase the risk of biologics or small molecule therapies to control inflammatory bowel disease: Yu Kyung Jun, Hyuk Yoon, Seong-Joon Koh, A Hyeon Kim, Kwang Woo Kim, Jun Won Park, Hyun Jung Lee, Hyoun Woo Kang, Jong Pil Im, Young Soo Park, Joo Sung Kim, on behalf of Seoul National University Inflammatory Bowel Disease Research Network (SIRN); Intest Res 2023;21(2):244-251. Published online August 8, 2022; DOI: https://doi.org/10.5217/ir.2022.00057

Abstract PDF Supplementary Material PubReader ePub

Background/Aims
Patients with inflammatory bowel disease (IBD) are diagnosed with ankylosing spondylitis (AS) often. However, the disease course of patients with both IBD and AS is not well understood. This study aims to evaluate the effect of concomitant AS on IBD outcomes.
Methods
Among the 4,722 patients with IBD who were treated in 3 academic hospitals from 2004 to 2021, 55 were also diagnosed with AS (IBD-AS group). Based on patients’ electronic medical records, the outcomes of IBD in IBD-AS group and IBD group without AS (IBD-only group) were appraised.
Results
The proportion of patients treated with biologics or small molecule therapies was significantly higher in IBD-AS group than the proportion in IBD-only group (27.3% vs. 12.7%, P= 0.036). Patients with both ulcerative colitis and AS had a significantly higher risk of biologics or small molecule therapies than patients with only ulcerative colitis (P< 0.001). For univariable logistic regression, biologics or small molecule therapies were associated with concomitant AS (odds ratio, 4.099; 95% confidence interval, 1.863–9.021; P< 0.001) and Crohn’s disease (odds ratio, 3.552; 95% confidence interval, 1.590–7.934; P= 0.002).
Conclusions
Concomitant AS is associated with the high possibility of biologics or small molecule therapies for IBD. IBD patients who also had AS may need more careful examination and active treatment to alleviate the severity of IBD.

Citations

Citations to this article as recorded by

Author's Reply: “Association of early antibiotic use with risk of ulcerative colitis”
Junseok Park, Sungjin Woo, Seong-Joon Koh
Digestive and Liver Disease.2025; 57(3): 795. CrossRef
Risk of all-cause and cause-specific mortality associated with immune-mediated inflammatory diseases in Korea
Oh Chan Kwon, See Young Lee, Jaeyoung Chun, Kyungdo Han, Yuna Kim, Ryul Kim, Min-Chan Park, Jie-Hyun Kim, Young Hoon Youn, Hyojin Park
Frontiers in Medicine.2023;[Epub] CrossRef

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