Journal of Pathology and Translational Medicine

Review

Inflammatory bowel disease–associated intestinal fibrosis: Ji Min Park, Jeongseok Kim, Yoo Jin Lee, Sung Uk Bae, Hye Won Lee; J Pathol Transl Med. 2023;57(1):60-66. Published online January 10, 2023; DOI: https://doi.org/10.4132/jptm.2022.11.02

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Fibrosis is characterized by a proliferation of fibroblasts and excessive extracellular matrix following chronic inflammation, and this replacement of organ tissue with fibrotic tissue causes a loss of function. Inflammatory bowel disease (IBD) is a chronic inflammation of the gastrointestinal tract, and intestinal fibrosis is common in IBD patients, resulting in several complications that require surgery, such as a stricture or penetration. This review describes the pathogenesis and various factors involved in intestinal fibrosis in IBD, including cytokines, growth factors, epithelial-mesenchymal and endothelial-mesenchymal transitions, and gut microbiota. Furthermore, histopathologic findings and scoring systems used for stenosis in IBD are discussed, and differences in the fibrosis patterns of ulcerative colitis and Crohn’s disease are compared. Biomarkers and therapeutic agents targeting intestinal fibrosis are briefly mentioned at the end.

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Original Article

Polo-like kinase 4 as a potential predictive biomarker of chemoradioresistance in locally advanced rectal cancer: Hyunseung Oh, Soon Gu Kim, Sung Uk Bae, Sang Jun Byun, Shin Kim, Jae-Ho Lee, Ilseon Hwang, Sun Young Kwon, Hye Won Lee; J Pathol Transl Med. 2022;56(1):40-47. Published online November 16, 2021; DOI: https://doi.org/10.4132/jptm.2021.10.07

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Abstract PDF Supplementary Material

Background
Polo-like kinase 4 (PLK4) is a serine/threonine protein kinase located in the centriole of the chromosome during the cell cycle. PLK4 overexpression has been described in a variety of many common human epithelial tumors. Conversely, PLK4 acts as a haploinsufficient tumor suppressor in some situations, highlighting the importance of strict regulation of PLK4 expression, activity, and function. Meanwhile, the importance of chemoradiation resistance in rectal cancer is being emphasized more than ever. We aimed to analyze PLK4 expression and the tumor regression grade (TRG) in patients with rectal cancer, treated with chemoradiotherapy (CRT).
Methods
A retrospective study was conducted on 102 patients with rectal cancer who received preoperative CRT. Immunohistochemistry for PLK4 in paraffin-embedded tissue was performed from the biopsy and surgical specimens.
Results
We found significant association between high expression of PLK4 and poor response to neoadjuvant CRT (according to both Mandard and The Korean Society of Pathologists TRG systems) in the pre-CRT specimens. Other clinicopathologic parameters did not reveal any correlation with PLK4 expression.
Conclusions
This study revealed an association between high expression of PLK4 in the pre-CRT specimens and TRG. Our results indicated that PLK4 could potentially be a new predictor for CRT effect in patients with rectal cancer.

Citations

Citations to this article as recorded by

Polo-like kinase 4 (PLK4) as a therapeutic target in breast cancer
Armen Parsyan, Harjot Athwal, Vasudeva Bhat, Alison L Allan
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Durdana Muntaqua, Gagan Chhabra, Karla B. Anaya Aldrete, Nihal Ahmad
iScience.2025; 28(12): 114186. CrossRef

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