Abstract
5-Fluorouracil (5-FU) is an essential drug in systemic chemotherapy
treatments for colorectal cancer (CRC). Despite
the development of several treatment strategies over the past
decades, the patient benefits of 5-FU-based therapies have
been compromised by the development of chemoresistance.
Differences in treatment responses among CRC patients may
be due to genetic and epigenetic factors unique to individuals.
Therefore, important factors for realizing personalized medicine
are to accurately understand the causes and mechanisms
of drug resistance to 5-FU-based therapies and to identify
and validate prognostic biomarkers. Gut microbes that
interact directly with the host contribute to human health
and cancer control. Lactobacillus plantarum, in particular, has
the potential to be a therapeutic agent by producing bioactive
compounds that may benefit the host. Here, we investigated
the gamma-aminobutyric acid (GABA) and GABAB
receptor (GABABR)-dependent signaling pathway as a treatment
option for 5-FU-resistant HT-29 cells. GABA-producing
L. plantarum activates anti-proliferative, anti-migration,
and anti-invasion effects against 5-FU-resistant HT-29 cells.
The inhibitory effects of GABA-producing L. plantarum are
mediated via GABABR. Activated GABABR induces apoptosis
through the inhibition of cAMP-dependent signaling
pathways and cellular inhibitor of apoptosis protein 2 (cIAP2)
expression. Thus, the GABAergic system has potential in 5-
FU-resistant HT-29 cells as a predictive biomarker. In addition,
GABA-producing L. plantarum is promising as an adjuvant
treatment for 5-FU-resistant CRC, and its intervention
in neurobiological signaling imply new possibilities for
chemoprevention and the treatment of colon cancer-related
diseases.
Citations
Citations to this article as recorded by

- γ-Linolenic acid derived from Lactobacillus plantarum MM89 induces ferroptosis in colorectal cancer
Yan Chen, Yijie Zhang, Mengmeng Dai, Cheng Qiu, Qinsheng Sun, Tingting Fan, Yuan Guo, Liqing Zhao, Yuyang Jiang
Food & Function.2025; 16(5): 1760. CrossRef - Probiotics in colorectal cancer prevention and therapy: mechanisms, benefits, and challenges
Djilali Seghir Morsli, Hadja Fatima Tbahriti, Fouzia Rahli, Fatima Zohra Mahammi, Andrey Nagdalian, Hassan A. Hemeg, Muhammad Imran, Abdur Rauf, Mohammad Ali Shariati
Discover Oncology.2025;[Epub] CrossRef - Unlocking the power of probiotics, postbiotics: targeting apoptosis for the treatment and prevention of digestive diseases
Qiuyan Xie, Ji Liu, Ping Yu, Ting Qiu, Shanyu Jiang, Renqiang Yu
Frontiers in Nutrition.2025;[Epub] CrossRef - Bioactive Compounds and Antioxidant Properties of Sheep’s Milk Yogurt Enriched with a Postbiotic Extract from Lactiplantibacillus plantarum UCLM56: Effects of In Vitro Digestion and Fermentation
Inés María Ramos, Beatriz Navajas-Porras, Adriana Delgado-Osorio, José Ángel Rufián-Henares, Justa María Poveda
Journal of Agricultural and Food Chemistry.2025;[Epub] CrossRef - Transcriptomic analysis and experiments revealed that remimazolam promotes proliferation and G1/S transition in HCT8 cells
Runjia Wang, Shuai Li, Han Hu, Qi Hou, Huaqing Chu, Yu Hou, Cheng Ni, Yuliang Ran, Hui Zheng
Frontiers in Oncology.2024;[Epub] CrossRef - Enhanced antibacterial properties of enteric glial cells attenuate intestinal inflammation through the GABABR-mediated autophagy pathway
Ziteng Deng, Jing Lan, Jiaqi Wang, Lu Wang, Zhihui Hao, Yunfei Ma
One Health Advances.2024;[Epub] CrossRef - Beneficial microbiome and diet interplay in early-onset colorectal cancer
Zhengyuan Zhou, Linda Kleis, Ana Depetris-Chauvin, Stefanie Jaskulski, Victoria Damerell, Karin B Michels, Biljana Gigic, Ute Nöthlings, Gianni Panagiotou
EMBO Molecular Medicine.2024; 17(1): 9. CrossRef - The Impact of the Gut Microbiome, Environment, and Diet in Early-Onset Colorectal Cancer Development
Rui Dai, Bridget N. Kelly, Amarachi Ike, David Berger, Andrew Chan, David A. Drew, David Ljungman, David Mutiibwa, Rocco Ricciardi, Gerald Tumusiime, James C. Cusack
Cancers.2024; 16(3): 676. CrossRef - Epiberberine induced p53/p21-dependent G2/M cell cycle arrest and cell apoptosis in gastric cancer cells by activating γ-aminobutyric acid receptor- β3
Mengmeng Li, Jiaye Yang, Juan Li, Yuan Zhou, Xiaoduo Li, Zhengcai Ma, Xuegang Li, Hang Ma, Xiaoli Ye
Phytomedicine.2024; 123: 155198. CrossRef - Heat-killed Prevotella intermedia promotes the progression of oral squamous cell carcinoma by inhibiting the expression of tumor suppressors and affecting the tumor microenvironment
Yifan Zhou, Yao Qin, Jingjing Ma, Zhiyuan Li, Weiwei Heng, Lei Zhang, Hong Liu, Ruowei Li, Miaomiao Zhang, Qiao Peng, Pei Ye, Ning Duan, Ting Liu, Wenmei Wang, Xiang Wang
Experimental Hematology & Oncology.2024;[Epub] CrossRef - Sodium Butyrate Inhibits the Malignant Proliferation of Colon Cancer Cells via the miR-183/DNAJB4 Axis
Dingguo Pan, Jingchao Hao, Tao Wu, Tao Shen, Kun Yu, Qiang Li, Ruixi Hu, Zhaoyu Yang, Yunfeng Li
Biochemical Genetics.2024; 62(5): 4174. CrossRef - Intervention in gut microbiota increases intestinal γ-aminobutyric acid and alleviates anxiety behavior: a possible mechanism via the action on intestinal epithelial cells
Mion Ikegami, Hikari Narabayashi, Kazuaki Nakata, Miyu Yamashita, Yutaka Sugi, Yushiro Fuji, Hiroshi Matsufuji, Gaku Harata, Kazutoyo Yoda, Kenji Miyazawa, Yusuke Nakanishi, Kyoko Takahashi
Frontiers in Cellular and Infection Microbiology.2024;[Epub] CrossRef - Targeting the gut and tumor microbiome in cancer treatment resistance
Sona Ciernikova, Aneta Sevcikova, Michal Mego
American Journal of Physiology-Cell Physiology.2024; 327(6): C1433. CrossRef - GABAergic signaling as a potential therapeutic target in cancers
Yihui Yang, Liwen Ren, Wan Li, Yizhi Zhang, Sen Zhang, Binbin Ge, Hong Yang, Guanhua Du, Bo Tang, Hongquan Wang, Jinhua Wang
Biomedicine & Pharmacotherapy.2023; 161: 114410. CrossRef - Nutritional value and health benefits of cashew apple
Yaw Gyau Akyereko, Georgina Benewaa Yeboah, Faustina Dufie Wireko‐Manu, Francis Alemawor, F. C. Mills‐Robertson, William Odoom
JSFA reports.2023; 3(3): 110. CrossRef - Gut microbiota in colorectal cancer development and therapy
Chi Chun Wong, Jun Yu
Nature Reviews Clinical Oncology.2023; 20(7): 429. CrossRef - Biosynthesis of Gamma-Aminobutyric Acid (GABA) by Lactiplantibacillus plantarum in Fermented Food Production
Massimo Iorizzo, Gianluca Paventi, Catello Di Martino
Current Issues in Molecular Biology.2023; 46(1): 200. CrossRef - Lactobacillus plantarum Metabolites Elicit Anticancer Effects by Inhibiting Autophagy-Related Responses
Sihyun Jeong, Yuju Kim, Soyeong Park, Doyeon Lee, Juho Lee, Shwe Phyu Hlaing, Jin-Wook Yoo, Sang Hoon Rhee, Eunok Im
Molecules.2023; 28(4): 1890. CrossRef - Various Effects of the GABAergic System on Cancer: The Conditions and
Specificities of its use in the Treatment of Some Cancers
Hossein Tahmasebi Dehkordi, Sorayya Ghasemi, Masoumeh Eliyasi Dashtaki
Current Topics in Medicinal Chemistry.2023; 23(20): 1928. CrossRef - The orchestra of human bacteriome by hormones
Arif Luqman
Microbial Pathogenesis.2023; 180: 106125. CrossRef - Gamma‐aminobutyric acid (GABA) can affect physiological processes in preimplantation embryos via GABAA and GABAB receptors
Veronika Kovaříková, Alexandra Špirková, Zuzana Šefčíková, Jozef Pisko, Laura Kalatová, Juraj Koppel, Dušan Fabian, Štefan Čikoš
Reproductive Medicine and Biology.2023;[Epub] CrossRef - Lactobacillus plantarum-derived metabolites sensitize the tumor-suppressive effects of butyrate by regulating the functional expression of SMCT1 in 5-FU-resistant colorectal cancer cells
Hye-Ju Kim, JaeJin An, Eun-Mi Ha
Journal of Microbiology.2022; 60(1): 100. CrossRef - Engineered Bacteria-Based Living Materials for Biotherapeutic Applications
Rabia Omer, Muhammad Zubair Mohsin, Ali Mohsin, Bilal Sajid Mushtaq, Xumeng Huang, Meijin Guo, Yingping Zhuang, Jiaofang Huang
Frontiers in Bioengineering and Biotechnology.2022;[Epub] CrossRef - Extracellular vesicles derived from Lactobacillus plantarum restore chemosensitivity through the PDK2-mediated glucose metabolic pathway in 5-FU-resistant colorectal cancer cells
JaeJin An, Eun-Mi Ha
Journal of Microbiology.2022; 60(7): 735. CrossRef - Role of lactobacillus strains in the management of colorectal cancer: An overview of recent advances
Elnaz Ghorbani, Amir Avan, Mikhail Ryzhikov, Gordon Ferns, Majid Khazaei, Saman Soleimanpour
Nutrition.2022; 103-104: 111828. CrossRef - Gut Microbiota Eubacterium callanderi Exerts Anti-Colorectal Cancer Activity
Seoung Woo Ryu, Ji-Sun Kim, Byeong Seob Oh, Won Jung Choi, Seung Yeob Yu, Jeong Eun Bak, Seung-Hwan Park, Se Won Kang, Jiyoung Lee, Won Yong Jung, Jung-Sook Lee, Ju Huck Lee, Zhenjiang Zech Xu
Microbiology Spectrum.2022;[Epub] CrossRef - The intestinal microbiota in colorectal cancer metastasis – Passive observer or key player?
Meera Patel, Milly McAllister, Raghavendar Nagaraju, Sara Samir Foad Al Badran, Joanne Edwards, Andrew J. McBain, Jorge Barriuso, Omer Aziz
Critical Reviews in Oncology/Hematology.2022; 180: 103856. CrossRef - A comprehensive analysis of the microbiota composition and host driver gene mutations in colorectal cancer
Danping Yuan, Yong Tao, Haoyi Wang, Jiawei Wang, Yuepeng Cao, Wen Cao, Shou Pan, Zhaonan Yu
Investigational New Drugs.2022; 40(5): 884. CrossRef - Neurotransmitter signaling: a new frontier in colorectal cancer biology and treatment
Francesca Battaglin, Priya Jayachandran, Carly Strelez, Annika Lenz, Sandra Algaze, Shivani Soni, Jae Ho Lo, Yan Yang, Joshua Millstein, Wu Zhang, Evanthia T. Roussos Torres, Jean C. Shih, Shannon M. Mumenthaler, Josh Neman, Heinz-Josef Lenz
Oncogene.2022; 41(43): 4769. CrossRef - Probiotics and live biotherapeutic products aiming at cancer mitigation and patient recover
Zelinda Schemczssen-Graeff, Marcos Pileggi
Frontiers in Genetics.2022;[Epub] CrossRef - Gut microbiota: Linking nutrition and perinatal depression
Jia Song, Bi Zhou, Juntao Kan, Guangya Liu, Sheng Zhang, Liang Si, Xianping Zhang, Xue Yang, Junhua Ma, Junrui Cheng, Xiaobo Liu, Yongde Yang
Frontiers in Cellular and Infection Microbiology.2022;[Epub] CrossRef - Exosome-Mediated Activation of Neuronal Cells Triggered by γ-Aminobutyric Acid (GABA)
Ryo Inotsuka, Miyako Udono, Atsushi Yamatsu, Mujo Kim, Yoshinori Katakura
Nutrients.2021; 13(8): 2544. CrossRef - Restoring HOXD10 Exhibits Therapeutic Potential for Ameliorating Malignant Progression and 5-Fluorouracil Resistance in Colorectal Cancer
Weijie Pan, Kaijing Wang, Jiayong Li, Hanhua Li, Yuchan Cai, Min Zhang, Aili Wang, Yazhou Wu, Wei Gao, Wenhao Weng
Frontiers in Oncology.2021;[Epub] CrossRef