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Luo Y, Zhang G, Hu C, Huang L, Wang D, Chen Z, Wang Y. The Role of Natural Products from Herbal Medicine in TLR4 Signaling for Colorectal Cancer Treatment. Molecules 2024; 29:2727. [PMID: 38930793 PMCID: PMC11206024 DOI: 10.3390/molecules29122727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 05/24/2024] [Accepted: 06/05/2024] [Indexed: 06/28/2024] Open
Abstract
The toll-like receptor 4 (TLR4) signaling pathway constitutes an intricate network of protein interactions primarily involved in inflammation and cancer. This pathway triggers intracellular signaling cascades, modulating transcription factors that regulate gene expression related to immunity and malignancy. Previous studies showed that colon cancer patients with low TLR4 expression exhibit extended survival times and the TLR4 signaling pathway holds a significant role in CRC pathogenesis. In recent years, traditional Chinese medicines (TCMs) have garnered substantial attention as an alternative therapeutic modality for CRC, primarily due to their multifaceted composition and ability to target multiple pathways. Emerging evidence indicates that specific TCM products, such as andrographolide, rosmarinic acid, baicalin, etc., have the potential to impede CRC development through the TLR4 signaling pathway. Here, we review the role and biochemical processes of the TLR4 signaling pathway in CRC, and natural products from TCMs affecting the TLR4 pathway. This review sheds light on potential treatment strategies utilizing natural TLR4 inhibitors for CRC, which contributes to the advancement of research and accelerates their clinical integration into CRC treatment.
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Affiliation(s)
- Yan Luo
- School of Basic Medical Sciences, State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; (Y.L.); (G.Z.); (L.H.); (D.W.)
| | - Guochen Zhang
- School of Basic Medical Sciences, State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; (Y.L.); (G.Z.); (L.H.); (D.W.)
| | - Chao Hu
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China;
| | - Lijun Huang
- School of Basic Medical Sciences, State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; (Y.L.); (G.Z.); (L.H.); (D.W.)
| | - Dong Wang
- School of Basic Medical Sciences, State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; (Y.L.); (G.Z.); (L.H.); (D.W.)
| | - Zhejie Chen
- Shanghai Key Laboratory for Nucleic Acid Chemistry and Nanomedicine, Institute of Molecular Medicine (IMM), Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Yumei Wang
- School of Basic Medical Sciences, State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; (Y.L.); (G.Z.); (L.H.); (D.W.)
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Cochrane S, Rajagopal R, Sheffield D, Stewart F, Hathaway L, Barnes NM, Qureshi O, Gordon J. Impact of a varied set of stimuli on a suite of immunological parameters within peripheral blood mononuclear cells: toward a non-animal approach for assessing immune modulation by materials intended for human use. FRONTIERS IN TOXICOLOGY 2024; 6:1335110. [PMID: 38737195 PMCID: PMC11082367 DOI: 10.3389/ftox.2024.1335110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Accepted: 04/04/2024] [Indexed: 05/14/2024] Open
Abstract
Introduction: In toxicology, steps are being taken towards more mechanism-focused and human relevant approaches to risk assessment, requiring new approaches and methods. Additionally, there is increasing emphasis by regulators on risk assessment of immunotoxicity. Methods: Here we present data from a peripheral blood mononuclear cell (PBMC) system whereby a varied set of stimuli, including those against the TCR and Toll-like receptors, enable readouts of cytokine and prostaglandin E2 (PGE2) production with monocyte, T cell and B cell viability, proliferation, and associated activation markers. In addition to results on the impact of the stimuli used, initial profiling data for a case study chemical, curcumin, is presented, illustrating how the system can be used to generate information on the impact of exogenous materials on three major constituent immune cell subsets for use in risk assessment and to direct follow-on studies. Results: The different stimuli drove distinct responses, not only in relation to the "quantity" of the response but also the "quality". Curcumin had a limited impact on the B cell parameters measured, with the stimuli used, and it was noted that in contrast to T cells where there was either no impact or a reduction in viability and proliferation with increasing concentration, for B cells there was a small but significant increase in both measurements at curcumin concentrations below 20 µM. Similarly, whilst expression of activation markers by T cells was reduced by the highest concentration of curcumin, they were increased in B cells. Curcumin only impacted the viability of stimulated monocytes at the highest concentration and had differential impact on different activation markers. Levels of all cytokines and PGE2 were reduced at higher concentrations. Discussion: Although the platform has certain limitations, it nevertheless enables assessment of healthy baseline monocyte, T-, and B-cell responses, and scrutiny of the impact of different stimuli to detect potential immune suppression or enhancement from exogenous materials. In the case of curcumin, a pattern of responses indicative of immune suppressive / anti-inflammatory effects was detected. It is an accessible, highly modifiable system that can be used to screen materials and guide further studies, providing a holistic, integrated picture of effects.
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Affiliation(s)
- Stella Cochrane
- Safety and Environmental Assurance Centre (SEAC), Unilever, Colworth Science Park, Sharnbrook, United Kingdom
| | - Ramya Rajagopal
- Safety and Environmental Assurance Centre (SEAC), Unilever, Colworth Science Park, Sharnbrook, United Kingdom
| | - David Sheffield
- Safety and Environmental Assurance Centre (SEAC), Unilever, Colworth Science Park, Sharnbrook, United Kingdom
| | - Fay Stewart
- Celentyx Ltd., Birmingham Research Park, Birmingham, United Kingdom
| | - Lindsay Hathaway
- Celentyx Ltd., Birmingham Research Park, Birmingham, United Kingdom
| | - Nicholas M. Barnes
- Celentyx Ltd., Birmingham Research Park, Birmingham, United Kingdom
- Institute for Clinical Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Omar Qureshi
- Celentyx Ltd., Birmingham Research Park, Birmingham, United Kingdom
| | - John Gordon
- Celentyx Ltd., Birmingham Research Park, Birmingham, United Kingdom
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Nuiyen A, Rattanasri A, Wipa P, Roytrakul S, Wangteeraprasert A, Pongcharoen S, Ngoenkam J. Lack of Nck1 protein and Nck-CD3 interaction caused the increment of lipid content in Jurkat T cells. BMC Mol Cell Biol 2022; 23:36. [PMID: 35902806 PMCID: PMC9330638 DOI: 10.1186/s12860-022-00436-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 07/14/2022] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
The non-catalytic region of tyrosine kinase (Nck) is an adaptor protein, which is ubiquitously expressed in many types of cells. In T cells, the Nck1 isoform promotes T cell receptor signalling as well as actin polymerisation. However, the role of Nck1 in the lipid metabolism in T cells is unknown. In the present study, we investigated the effect of the Nck1 protein and Nck–CD3 interaction on lipid metabolism and on the physical and biological properties of Jurkat T cells, using a newly developed holotomographic microscope.
Results
Holotomographic microscopy showed that Nck1-knocked-out cells had membrane blebs and were irregular in shape compared to the rounded control cells. The cell size and volume of Nck1-deficient cells were comparable to those of the control cells. Nck1-knocked-out Jurkat T cells had a greater lipid content, lipid mass/cell mass ratio, and lipid metabolite levels than the control cells. Interestingly, treatment with a small molecule, AX-024, which inhibited Nck–CD3 interaction, also caused an increase in the lipid content in wild-type Jurkat T cells, as found in Nck1-deficient cells.
Conclusions
Knockout of Nck1 protein and hindrance of the Nck–CD3 interaction cause the elevation of lipid content in Jurkat T cells.
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Cho YE, Vorn R, Chimenti M, Crouch K, Shaoshuai C, Narayanaswamy J, Harken A, Schmidt R, Gill J, Lee H. Extracellular vesicle miRNAs in breast milk of obese mothers. Front Nutr 2022; 9:976886. [PMID: 36313069 PMCID: PMC9597365 DOI: 10.3389/fnut.2022.976886] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 09/26/2022] [Indexed: 11/18/2022] Open
Abstract
Background Breast milk has abundant extracellular vesicles (EVs) containing various biological molecules (cargo), including miRNAs. EVs are not degraded in the gastrointestinal system and circulation; thus, breast milk EVs (bEVs) are expected to interact with other organs in breastfed infants and modify the gene expression of recipient cells using miRNAs. Maternal pre-pregnancy BMI is a critical factor influencing the composition of breast milk. Thus, in mothers with obesity, miRNAs in bEVs can be altered, which might be associated with adverse health outcomes in infants. In this study, we examined 798 miRNAs to determine which miRNAs are altered in the bEVs of mothers with obesity and their potential impact on breastfed infants. Methods We recruited healthy nursing mothers who were either of normal weight (BMI < 25) or with obesity (BMI ≥ 30) based on their pre-pregnancy BMI, and delivered a singleton baby in the prior 6 months. EVs were isolated from breast milk with ultracentrifugation. bEV characteristics were examined by flow cytometry and fluorescence imaging of EV markers. A total of 798 miRNAs were screened using a NanoString human miRNA panel to find differentially expressed miRNAs in bEVs of mothers with obesity compared to mothers of normal weight. Results We included 65 nursing mothers: 47 of normal weight and 18 with obesity based on pre-pregnancy BMI. After bEV isolation, we confirmed the expression of various EV markers. Out of 37 EV markers, CD326 (EpCaM) was the most highly expressed in bEVs. The most abundant miRNAs in bEVs include miR-30b-5p, miR-4454, miR-494-3p, and let-7 miRNAs. Target genes of the top 10 miRNAs were associated with cancer, prolactin pathway, EGFR, ErbB, and FoxO signaling pathway. In bEVs of mothers with obesity, 19 miRNAs were differentially expressed (adjusted p < 0.05 cut-off), which include miR-575, miR-630, miR-642a-3p, and miR-652-5p. These miRNAs and their target genes were associated with neurological diseases and psychological disorders. Conclusion In this study, we characterized bEVs and demonstrated altered miRNAs in bEVs of mothers with obesity and identified the pathways of their potential target genes. Our findings will provide insight for future studies investigating the role of bEVs in breastfed infants.
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Affiliation(s)
- Young Eun Cho
- College of Nursing, The University of Iowa, Iowa City, IA, United States,*Correspondence: Young-Eun Cho,
| | - Rany Vorn
- School of Nursing, Johns Hopkins University, Baltimore, MD, United States
| | - Michael Chimenti
- College of Medicine The University of Iowa, Iowa City, IA, United States
| | - Keith Crouch
- College of Nursing, The University of Iowa, Iowa City, IA, United States
| | - Chen Shaoshuai
- College of Nursing, The University of Iowa, Iowa City, IA, United States
| | | | - Alaria Harken
- College of Nursing, The University of Iowa, Iowa City, IA, United States
| | - Reegan Schmidt
- College of Nursing, The University of Iowa, Iowa City, IA, United States
| | - Jessica Gill
- School of Nursing, Johns Hopkins University, Baltimore, MD, United States,Department of Neurology and Neurosurgery, The Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Hyangkyu Lee
- Mo-Im Kim Nursing Research Institute, College of Nursing, Yonsei University, Seoul, South Korea
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Guo J, Liao M, Wang J. TLR4 signaling in the development of colitis-associated cancer and its possible interplay with microRNA-155. Cell Commun Signal 2021; 19:90. [PMID: 34479599 PMCID: PMC8414775 DOI: 10.1186/s12964-021-00771-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 07/29/2021] [Indexed: 12/17/2022] Open
Abstract
Ulcerative colitis (UC) has closely been associated with an increased risk of colorectal cancer. However, the exact mechanisms underlying colitis-associated cancer (CAC) development remain unclear. As a classic pattern-recognition receptor, Toll like receptor (TLR)4 is a canonical receptor for lipopolysaccharide of Gram-negative bacteria (including two CAC-associated pathogens Fusobacterium nucleatum and Salmonella), and functions as a key bridge molecule linking oncogenic infection to colonic inflammatory and malignant processes. Accumulating studies verified the overexpression of TLR4 in colitis and CAC, and the over-expressed TLR4 might promote colitis-associated tumorigenesis via facilitating cell proliferation, protecting malignant cells against apoptosis, accelerating invasion and metastasis, as well as contributing to the creation of tumor-favouring cellular microenvironment. In recent years, considerable attention has been focused on the regulation of TLR4 signaling in the context of colitis-associated tumorigenesis. MicroRNA (miR)-155 and TLR4 exhibited a similar dynamic expression change during CAC development and shared similar CAC-promoting properties. The available data demonstrated an interplay between TLR4 and miR-155 in the context of different disorders or cell lines. miR-155 could augment TLR4 signaling through targeting negative regulators SOCS1 and SHIP1; and TLR4 activation would induce miR-155 expression via transcriptional and post-transcriptional mechanisms. This possible TLR4-miR-155 positive feedback loop might result in the synergistic accelerating effect of TLR4 and miR-155 on CAC development.![]() Video abstract
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Affiliation(s)
- Jie Guo
- Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, Wuhan, China.,New Medicine Innovation and Development Institute, Department of Pharmacy, College of Medicine, Wuhan University of Science and Technology, Wuhan, China
| | - Mengfan Liao
- Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, Wuhan, China.,New Medicine Innovation and Development Institute, Department of Pharmacy, College of Medicine, Wuhan University of Science and Technology, Wuhan, China
| | - Jun Wang
- Hubei Province Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, Wuhan, China. .,New Medicine Innovation and Development Institute, Department of Pharmacy, College of Medicine, Wuhan University of Science and Technology, Wuhan, China.
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Pastille E, Faßnacht T, Adamczyk A, Ngo Thi Phuong N, Buer J, Westendorf AM. Inhibition of TLR4 Signaling Impedes Tumor Growth in Colitis-Associated Colon Cancer. Front Immunol 2021; 12:669747. [PMID: 34025672 PMCID: PMC8138317 DOI: 10.3389/fimmu.2021.669747] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 04/20/2021] [Indexed: 01/06/2023] Open
Abstract
Patients suffering from ulcerative colitis are at increased risk of developing colorectal cancer. Although the exact underlying mechanisms of inflammation-associated carcinogenesis remain unknown, the intestinal microbiota as well as pathogenic bacteria are discussed as contributors to inflammation and colitis-associated colon cancer (CAC). In the present study, we analyzed the impact of TLR4, the receptor for Gram-negative bacteria derived lipopolysaccharides, on intestinal inflammation and tumorigenesis in a murine model of CAC. During the inflammatory phases of CAC development, we observed a strong upregulation of Tlr4 expression in colonic tissues. Blocking of TLR4 signaling by a small-molecule-specific inhibitor during the inflammatory phases of CAC strongly diminished the development and progression of colonic tumors, which was accompanied by decreased numbers of infiltrating macrophages and reduced colonic pro-inflammatory cytokine levels compared to CAC control mice. Interestingly, inhibiting bacterial signaling by antibiotic treatment during the inflammatory phases of CAC also protected mice from severe intestinal inflammation and almost completely prevented tumor growth. Nevertheless, application of antibiotics involved rapid and severe body weight loss and might have unwanted side effects. Our results indicate that bacterial activation of TLR4 on innate immune cells in the colon triggers inflammation and promotes tumor growth. Thus, the inhibition of the TLR4 signaling during intestinal inflammation might be a novel approach to impede CAC development.
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Affiliation(s)
| | | | | | | | | | - Astrid M. Westendorf
- Institute of Medical Microbiology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
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Ahmad I, Nasti TH, Rihan HM, Jimenez H, Elmets CA, Yusuf N. Toll-like receptor-4 deficiency inhibits ultraviolet radiation-induced tumor development by modulation of immune and inflammatory responses. Mol Carcinog 2020; 60:60-70. [PMID: 33283918 DOI: 10.1002/mc.23271] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 10/29/2020] [Accepted: 11/09/2020] [Indexed: 12/19/2022]
Abstract
Ultraviolet (UV) B irradiation of the skin induces acute inflammation, as characterized by erythema, edema, and immunosuppression, and is subsequently linked to the progression of skin cancer. Toll-like receptor 4 (TLR4), a component of innate immunity, has been shown to play an important role in cancer. To elucidate the role of TLR4 in UVB-induced tumor development, TLR4-proficient (C3H/HeN) and TLR4-deficient (C3H/HeJ) mice were exposed to multiple doses of UVB radiation (200 mJ/cm2 ) for 40 weeks. Photocarcinogenesis was retarded in terms of tumor incidence, and tumor latency, in mice deficient in TLR4 compared with TLR4-proficient mice, whereas significantly greater numbers of tumors occurred in TLR4-proficient mice. There was significant upregulation of inflammatory markers like COX-2, PGE2 , S100A8, and S100A9 in the skin of TLR4-proficient mice than the skin of TLR4-deficient mice. Furthermore, we found that TLR4-proficient mice had a significantly higher number of Gr1+CD11b+ myeloid cells CD4+CD25+ regulatory T-cells than TLR4-deficient mice. Furthermore, the levels of interferon (IFN)-γ cytokine was increased and the levels of interleukin (IL)-4, IL-10, and IL-17 cytokines were decreased in serum, skin, and tumor lysates of TLR4-deficient mice in comparison with samples from TLR4-proficient mice. Together, our data indicate that TLR4-mediated inflammation may cause suppression of antitumor responses and trigger the development of UVB-induced skin cancers. Thus, strategies to inhibit TLR4-mediated immune suppression may allow us to develop preventive and therapeutic approaches for the management of UVB-induced cutaneous tumors.
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Affiliation(s)
- Israr Ahmad
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Tahseen H Nasti
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Heba M Rihan
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Hugo Jimenez
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Craig A Elmets
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama, USA.,Veteran Affairs Medical Center, University of Alabama at Birmingham, Birmingham, Alabama, USA.,O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Nabiha Yusuf
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, Alabama, USA.,Veteran Affairs Medical Center, University of Alabama at Birmingham, Birmingham, Alabama, USA.,O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, Alabama, USA
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Ramos-Benítez MJ, Ruiz-Jiménez C, Aguayo V, Espino AM. Recombinant Fasciola hepatica fatty acid binding protein suppresses toll-like receptor stimulation in response to multiple bacterial ligands. Sci Rep 2017; 7:5455. [PMID: 28710478 PMCID: PMC5511235 DOI: 10.1038/s41598-017-05735-w] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 06/02/2017] [Indexed: 01/07/2023] Open
Abstract
Recently, we reported that a native Fasciola hepatica fatty acid binding protein (FABP) termed Fh12 is a powerful anti-inflammatory protein capable of suppressing the LPS-induced expression of inflammatory markers in vivo and in vitro. Because the purification of a protein in native form is, in many situations not cost-beneficial and unsuitable for industrial grade scale-up, this study accomplished the task of optimizing the expression and purification of a recombinant form of FABP (Fh15). Additionally, we ascertained whether this molecule could exhibit a similar suppressive effect on TLR-stimulation and inflammatory cytokine expression from macrophages than those previously demonstrated for the native molecule. Results demonstrated that Fh15 suppresses the expression of IL-1β and TNFα in murine macrophages and THP1 Blue CD14 cells. Additionally, Fh15 suppress the LPS-induced TLR4 stimulation. This effect was not impaired by a thermal denaturing process or blocked by the presence of anti-Fh12 antibodies. Fh15 also suppressed the stimulation of various TLRs in response to whole bacteria extracts, suggesting that Fh15 could have a broad spectrum of action. These results support the possibility of using Fh15 as an excellent alternative for an anti-inflammatory drug in preclinical studies in the near future.
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Affiliation(s)
- Marcos J Ramos-Benítez
- University of Puerto Rico, Medical Sciences Campus, Department of Microbiology, PO BOX 365067, San Juan, Puerto Rico, 00936, USA
| | - Caleb Ruiz-Jiménez
- University of Puerto Rico, Medical Sciences Campus, Department of Microbiology, PO BOX 365067, San Juan, Puerto Rico, 00936, USA
| | - Vasti Aguayo
- University of Puerto Rico, Medical Sciences Campus, Department of Microbiology, PO BOX 365067, San Juan, Puerto Rico, 00936, USA
| | - Ana M Espino
- University of Puerto Rico, Medical Sciences Campus, Department of Microbiology, PO BOX 365067, San Juan, Puerto Rico, 00936, USA.
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Hu Z, Wang XY, Gong L, Wu GJ, Peng XB. Expression of high mobility group box 1 protein in ulcerative colitis. Shijie Huaren Xiaohua Zazhi 2014; 22:3239-3244. [DOI: 10.11569/wcjd.v22.i22.3239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Ulcerative colitis (UC) is a chronic inflammatory condition of the colon which involves a complex interplay of genetic, immunological and environmental factors. The precise pathogenesis of UC remains unclear till now. The high mobility group box 1 (HMGB1) protein is a nuclear non-histone DNA-binding protein that is present within the nuclei of almost all eukaryotic cells. Recent studies indicate that HMGB1 can be released into the extracellular milieu and mediate inflammatory response, thereby contributing to the pathogenesis of numerous infectious and noninfectious, inflammatory and autoimmune diseases, as well as cancers. Many studies have indicated that HMGB1 is involved in the development of UC. The present paper gives an overview of HMGB1 and UC.
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