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Pan H, Zhao Z, Zhu Y, Gao Y, Ruan H, Huang Y, Chi P, Huang S. Combining proteomics and Phosphoproteomics to investigate radiation-induced rectal fibrosis in rats and the effects of pSTAT3 inhibitor S3I-201 on human intestinal fibroblasts. J Proteomics 2024; 308:105287. [PMID: 39173903 DOI: 10.1016/j.jprot.2024.105287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 08/02/2024] [Accepted: 08/19/2024] [Indexed: 08/24/2024]
Abstract
OBJECTIVE To investigate the regulatory mechanisms of radiation-induced rectal fibrosis (RIRF) and assess the therapeutic potential of S3I-201. METHODS Sprague-Dawley rats were divided into control and radiation groups, with the latter exposed to 20 Gray pelvic X-rays. After 10 weeks, rectal tissues were analyzed using tandem mass tag (TMT) proteomics and phosphoproteomics. Pathway enrichment was performed via Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses, with secondary annotation using Cluego. Representative proteins and their phosphorylated counterparts were validated through immunoblotting in another cohort. STAT3 levels in rectal tissues from irradiated and non-irradiated colorectal cancer patients were examined, and the effects of S3I-201 on human rectal fibroblasts were evaluated. RESULTS The radiation group showed significant inflammatory responses and collagen deposition in the rat rectal walls. Enrichment analysis revealed that radiation-induced proteins and phosphoproteins were primarily involved in extracellular matrix-receptor interaction and the MAPK signaling pathway. Immunoblotting indicated increased expression of p-CAMKII, p-MRACKS, p-Cfl1, p-Myl9, and p-STAT3 in the radiation group compared to the control, while p-AKT1 expression decreased. Elevated phosphorylation of STAT3 was observed in submucosal fibroblasts of the post-radiation human rectum. S3I-201 specifically inhibited STAT3 phosphorylation and suppressed activation of human rectal fibroblasts, also inhibiting the pro-fibrotic effects of the classical TGF-β/Smad/CTGF pathway. CONCLUSION By integrating phosphoproteomics and proteomics, this study elucidated the protein regulatory network of RIRF and identified the potential therapeutic targets, including phosphoproteins such as STAT3 in managing RIRF. SIGNIFICANCE In our research, we employed TMT labeling alongside LC-MS/MS techniques to comprehensively explore the proteomic and phosphoproteomic landscapes in rat models of radiation-induced intestinal fibrosis (RIRF). Our analysis revealed the function and pathways of proteins and phosphorylated proteins triggered by radiation, as well as those with protective roles. We mapped a network of interactions among these proteins and validated key protein expression levels using quantitative methods. Furthermore, we investigated STAT3 as a potential therapeutic target, assessing the efficacy of the inhibitor S3I-201 in laboratory settings, and highlighting its potential for RIRF treatment. Overall, our findings provide groundbreaking insights into the mechanisms underlying RIRF, paving the way for the development of future antifibrotic therapies.
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Affiliation(s)
- Hongfeng Pan
- Department of Colorectal Surgery, Fujian Medical University Union Hospital, Fuzhou, China; Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, China
| | - Zeyi Zhao
- Department of Colorectal Surgery, Fujian Medical University Union Hospital, Fuzhou, China; Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, China
| | - Yuanchang Zhu
- Department of Colorectal Surgery, Fujian Medical University Union Hospital, Fuzhou, China; Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, China
| | - Yihuang Gao
- Department of Colorectal Surgery, Fujian Medical University Union Hospital, Fuzhou, China; Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, China
| | - Haoyang Ruan
- Department of Colorectal Surgery, Fujian Medical University Union Hospital, Fuzhou, China; Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, China
| | - Ying Huang
- Department of Colorectal Surgery, Fujian Medical University Union Hospital, Fuzhou, China; Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, China.
| | - Pan Chi
- Department of Colorectal Surgery, Fujian Medical University Union Hospital, Fuzhou, China; Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, China.
| | - Shenghui Huang
- Department of Colorectal Surgery, Fujian Medical University Union Hospital, Fuzhou, China; Department of General Surgery, Fujian Medical University Union Hospital, Fuzhou, China.
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Liu S, Guan C, Sha X, Gao X, Zou X, Yang C, Zhang X, Zhong X, Jiang X. Circ_0007534 promotes cholangiocarcinoma stemness and resistance to anoikis through DDX3X-mediated positive feedback regulation of parental gene DDX42. Cell Signal 2024; 118:111141. [PMID: 38492624 DOI: 10.1016/j.cellsig.2024.111141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Revised: 02/23/2024] [Accepted: 03/13/2024] [Indexed: 03/18/2024]
Abstract
Cholangiocarcinoma (CCA) is a malignancy with an extremely poor prognosis, and much remains unknown about its pathogenesis and treatment modalities. Circular RNA (circRNA) has been proven to play regulatory roles in various tumorigenesis, yet its potential function and mechanism in cholangiocarcinoma require further investigation. This study is the first to identify the aberrant expression and functional role of a novel circRNA, circ_0007534, derived from the DDX42 gene, in cholangiocarcinoma. Compared to the normal control group, the expression of circ_0007534 was significantly elevated in the tissues and cells with CCA and that high expression correlated with lymph node invasion and poor prognosis. Functional experiments indicated that downregulating circ_0007534 markedly inhibited the proliferation, migration, invasion, stemness, and anti-anoikis ability of CCA cells, as well as the tumor growth and liver and lung metastasis in nude mice. Mechanistic studies revealed that DDX42, as the parent gene of circ_0007534, can mutually regulate each other's expression. Predominantly located in the cytoplasm, circ_0007534 can form a complex with the RNA-binding protein DDX3X, which enhances the stability of DDX42 mRNA, thereby upregulating the expression of DDX42. This creates a positive feedback loop among the three, collectively promoting the progression of cholangiocarcinoma. In conclusion, this study sheds light on the pivotal role and molecular mechanism of circ_0007534 in the development of CCA, offering potential new targets for early diagnosis and treatment.
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Affiliation(s)
- Sidi Liu
- General Surgery Department, The 2nd Affiliated Hospital of Harbin Medical University, 148 Baojian Street, Harbin 150086, Heilongjiang Province, China
| | - Canghai Guan
- General Surgery Department, The 2nd Affiliated Hospital of Harbin Medical University, 148 Baojian Street, Harbin 150086, Heilongjiang Province, China
| | - Xiangjun Sha
- General Surgery Department, The 2nd Affiliated Hospital of Harbin Medical University, 148 Baojian Street, Harbin 150086, Heilongjiang Province, China
| | - Xin Gao
- General Surgery Department, The 2nd Affiliated Hospital of Harbin Medical University, 148 Baojian Street, Harbin 150086, Heilongjiang Province, China
| | - Xinlei Zou
- General Surgery Department, The 2nd Affiliated Hospital of Harbin Medical University, 148 Baojian Street, Harbin 150086, Heilongjiang Province, China
| | - Chengru Yang
- General Surgery Department, The 2nd Affiliated Hospital of Harbin Medical University, 148 Baojian Street, Harbin 150086, Heilongjiang Province, China
| | - Xinmiao Zhang
- General Surgery Department, The 2nd Affiliated Hospital of Harbin Medical University, 148 Baojian Street, Harbin 150086, Heilongjiang Province, China
| | - Xiangyu Zhong
- General Surgery Department, The 2nd Affiliated Hospital of Harbin Medical University, 148 Baojian Street, Harbin 150086, Heilongjiang Province, China.
| | - Xingming Jiang
- General Surgery Department, The 2nd Affiliated Hospital of Harbin Medical University, 148 Baojian Street, Harbin 150086, Heilongjiang Province, China.
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Guo H, Han Q, Guan X, Li Z, Wang Y, He L, Guo Y, Zhao L, Xue X, Liu H, Zhang C. M6A reader YTHDF1 promotes malignant progression of laryngeal squamous carcinoma through activating the EMT pathway by EIF4A3. Cell Signal 2024; 114:111002. [PMID: 38048860 DOI: 10.1016/j.cellsig.2023.111002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/09/2023] [Accepted: 12/01/2023] [Indexed: 12/06/2023]
Abstract
Laryngeal squamous cell carcinoma (LSCC) is one of the common malignant tumors in the head and neck region, and its high migration and invasion seriously threaten the survival and health of patients. In cancer development, m6A RNA modification plays a crucial role in regulating gene expression and signaling. This study delved into the function and mechanism of the m6A reading protein YTHDF1 in LSCC. It was found that YTHDF1 was highly expressed in the GEO database and LSCC tissues. Cell function experiments confirmed that the downregulation of YTHDF1 significantly inhibited the proliferation, migration, and invasion ability of LSCC cells. Further studies revealed that EIF4A3 was a downstream target gene of YTHDF1, and knockdown of EIF4A3 similarly significantly inhibited the malignant progression of LSCC in both in vivo and in vitro experiments. The molecular mechanism studies suggested that YTHDF1-EIF4A3 may promote the malignant development of LSCC by activating the EMT signaling pathway. This study provides important clues for an in-depth understanding of the pathogenesis of LSCC and is a solid foundation for the discovery of new therapeutic targets and approaches.
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Affiliation(s)
- Huina Guo
- Shanxi Key Laboratory of Otorhinolaryngology Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China; Shanxi Province Clinical Medical Research Center for Precision Medicine of Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - Qi Han
- Shanxi Key Laboratory of Otorhinolaryngology Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China; Shanxi Province Clinical Medical Research Center for Precision Medicine of Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - Xiaoya Guan
- Shanxi Key Laboratory of Otorhinolaryngology Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China; Shanxi Province Clinical Medical Research Center for Precision Medicine of Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - Zhongxun Li
- Shanxi Key Laboratory of Otorhinolaryngology Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China; Shanxi Province Clinical Medical Research Center for Precision Medicine of Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - Ying Wang
- Shanxi Key Laboratory of Otorhinolaryngology Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China; Shanxi Province Clinical Medical Research Center for Precision Medicine of Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - Long He
- Shanxi Key Laboratory of Otorhinolaryngology Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China; Shanxi Province Clinical Medical Research Center for Precision Medicine of Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - Yujia Guo
- Shanxi Key Laboratory of Otorhinolaryngology Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China; Shanxi Province Clinical Medical Research Center for Precision Medicine of Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - Liting Zhao
- Shanxi Key Laboratory of Otorhinolaryngology Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China; Shanxi Province Clinical Medical Research Center for Precision Medicine of Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - Xuting Xue
- Shanxi Key Laboratory of Otorhinolaryngology Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China; Shanxi Province Clinical Medical Research Center for Precision Medicine of Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - Hongliang Liu
- Shanxi Key Laboratory of Otorhinolaryngology Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China; Shanxi Province Clinical Medical Research Center for Precision Medicine of Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China; Department of Otolaryngology Head & Neck Surgery, First Hospital of Shanxi Medical University, Taiyuan 030001, China; Department of Cell Biology and Genetics, the Basic Medical School of Shanxi Medical University, Taiyuan 030001, Shanxi, China.
| | - Chunming Zhang
- Shanxi Key Laboratory of Otorhinolaryngology Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China; Shanxi Province Clinical Medical Research Center for Precision Medicine of Head and Neck Cancer, First Hospital of Shanxi Medical University, Taiyuan 030001, China; Department of Otolaryngology Head & Neck Surgery, First Hospital of Shanxi Medical University, Taiyuan 030001, China.
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