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Zou W, Zhang Q, Sun R, Li X, He S. Study on TFF1 and PALB2 gene variants associated with gastric carcinoma risk in the Chinese Han population. Cancer Epidemiol 2023; 83:102333. [PMID: 36758349 DOI: 10.1016/j.canep.2023.102333] [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: 06/18/2022] [Revised: 01/09/2023] [Accepted: 01/14/2023] [Indexed: 02/10/2023]
Abstract
OBJECTIVE Gastric carcinoma (GC) has received extensive attention due to its complex pathogenesis. Studies have shown that the expression of Trefoil factor 1 (TFF1) and Partner and localiser of BRCA2 (PALB2) genes promotes the occurrence of GC. Therefore, we investigated whether TFF1 and PALB2 gene polymorphisms are associated with GC risk in the Chinese Han population. METHODS A total of 509 GC cases and 505 controls were recruited, and single nucleotide polymorphisms (SNPs) of TFF1 and PALB2 in these subjects were genotyped. The association between each candidate polymorphism and GC risk was assessed by calculating odds ratios (ORs) and 95% confidence intervals (CIs). The visualization of gene-gene interactions and functional enrichment analysis were then performed using Cytoscape software and the R package "cluster profile". RESULTS The TFF1 rs2156310 polymorphism significantly reduced the predisposition to GC in people under 60 years of age (AA vs. AG - GG, OR = 0.58, 95% CI = 0.35-0.97, p = 0.036). The gender-stratified analysis found that PALB2 rs513313 was significantly associated with the risk of GC in males (CT vs. TT, OR = 1.51, 95% CI = 1.06-2.15, p = 0.022). Besides, PALB2 rs249954 significantly reduced the susceptibility to GC in females (AA vs GG, OR = 0.42, 95% CI = 0.19-0.94, p = 0.034). CONCLUSION Our results revealed that TFF1 and PALB2 gene polymorphisms were correlated with the genetic susceptibility to GC, providing certain data support for researchers to further study the mechanism of GC.
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Affiliation(s)
- Wenjing Zou
- Department of Digestive Internal Medicine, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China; Department of Digestive Internal Medicine, Xi'an Fifth Hospital, Xi'an 710082, China
| | - Qian Zhang
- Department of First Internal Medicine, Shaanxi Province Cancer Hospital, Xi'an 710061, China
| | - Ruifang Sun
- Department of Pathology, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - Xu Li
- Department of Sixth Internal Medicine, Shaanxi Province Cancer Hospital, Xi'an 710061, China.
| | - Shuixiang He
- Department of Digestive Internal Medicine, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China.
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Li W, Li Y, Jiang F, Liu H. Correlation between serum levels of microRNA-21 and inflammatory factors in patients with chronic heart failure. Medicine (Baltimore) 2022; 101:e30596. [PMID: 36197244 PMCID: PMC9509079 DOI: 10.1097/md.0000000000030596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
As the leading cause of hospitalization and mortality worldwide, heart failure (HF) has caused significant burden on both individuals and the whole society. Thus, increasing knowledge about the phytopathology of HF is in demand for both diagnosis and treatment. Previous studies have shown that both microRNA 21 (miRNA-21) and inflammatory factors are closely related to the development of cardiac fibrosis, hypertrophy, and HF. However, whether there is any crosstalk between the 2 has not been examined. The current study evaluated the correlation between serum levels of miRNA-21 and critical inflammatory factors during the progress of chronic heart failure (CHF), providing new insights in understanding the physiopathology of CHF and identifying CHF biomarkers. In the presented study, serum level of miR-21, cardiac neurohormone, and critical inflammatory factors were measured and compared on 120 (67 male/53 female) CHF patients and 100 (58 male/42 female) health people with non-failing hearts. Echocardiography was also conducted to assess the severity of CHF. Correlations between different factors were calculated and tested for statistical significance. From our results, CHF patients showed significantly decreased serum levels of miR-21 while increased levels of inflammatory factors and cardiac neurohormone (P < .05). Levels of miR-21 negatively correlate with cardiac function while positively correlates with myocardial remodeling (P < .05). Levels of miR-21 negatively correlate with inflammation in CHF (P < .05). These findings indicate the potential crosstalk between serum miR-21 and inflammation during CHF progression, suggesting the potential of miR-21 in CHF diagnosis, severity indication, and treatment.
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Affiliation(s)
- Weiwei Li
- Emergency Department, Second Hospital of Lanzhou University, Lanzhou, China
- *Correspondence: Weiwei Li, Emergency Department, Second Hospital of Lanzhou University, No. 82 Cuiyingmen, Lanzhou, Gansu 730000, China (e-mail: )
| | - Yanan Li
- Emergency Department, Second Hospital of Lanzhou University, Lanzhou, China
| | - Feng Jiang
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
| | - Huan Liu
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA
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Hoffmann W. Self-Renewal and Cancers of the Gastric Epithelium: An Update and the Role of the Lectin TFF1 as an Antral Tumor Suppressor. Int J Mol Sci 2022; 23:ijms23105377. [PMID: 35628183 PMCID: PMC9141172 DOI: 10.3390/ijms23105377] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 05/09/2022] [Accepted: 05/10/2022] [Indexed: 11/16/2022] Open
Abstract
In 2020, gastric cancer was the fourth leading cause of cancer deaths globally. About 90% of gastric cancers are sporadic and the vast majority are correlated with Helicobacter pylori infection; whereas familial clustering is observed in about 10% of cases. Gastric cancer is now considered to be a disease originating from dysregulated self-renewal of the gastric glands in the setting of an inflammatory environment. The human stomach contains two types of gastric units, which show bi-directional self-renewal from a complex variety of stem cells. This review focuses on recent progress concerning the characterization of the different stem cell populations and the mainly mesenchymal signals triggering their stepwise differentiation as well as the genesis of pre-cancerous lesions and carcinogenesis. Furthermore, a model is presented (Lectin-triggered Receptor Blocking Hypothesis) explaining the role of the lectin TFF1 as an antral tumor suppressor possibly regulating Lgr5+ antral stem cells in a paracrine or maybe autocrine fashion, with neighboring antral gland cells having a role as niche cells.
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Affiliation(s)
- Werner Hoffmann
- Institute of Molecular Biology and Medicinal Chemistry, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany
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4
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Zhang W, Zhang D, Cheng Y, Liang X, Wang J. Runx1 regulates Tff1 expression to expedite viability of retinal microvascular endothelial cells in mice with diabetic retinopathy. Exp Eye Res 2022; 217:108969. [PMID: 35114215 DOI: 10.1016/j.exer.2022.108969] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 01/25/2022] [Accepted: 01/27/2022] [Indexed: 11/04/2022]
Abstract
Diabetic retinopathy (DR) represents a major complication of diabetes, and molecular mechanisms related to vascular dysfunction, particularly endothelial dysfunction, in DR remains unclear. In the present work, we generated a DR animal model using mice and a cell model in mouse retinal microvascular endothelial cells (mRMECs) to examine the role of Trefoil factor family 1 (Tff1) in DR. Tff1 was poorly expressed in DR mice and high glucose (HG)-treated mRMECs. Overexpression of Tff1 significantly attenuated streptozotocin-induced retinal proliferation and angiogenesis in DR mice and reduced the secretion of inflammatory factors. In HG-treated mRMECs, overexpression of Tff1 remarkably reduced the proliferation and angiogenesis of mRMECs. In further experiments, we found that Tff1 was transcriptionally repressed by Runt-related transcription factor 1 (Runx1) directly, and Tff1 expression was indirectly modulated by Runx1 via the core-binding factor subunit beta (CBF-β)/nuclear factor, erythroid 2/microRNA-423-5p axis and the CBF-β/estrogen receptor 1 (ESR1) axis. Moreover, Tff1 could inhibit the activation of NF-κB signaling pathway, which in turn attenuated retinal endothelial cell proliferation and angiogenesis. It was thus proposed that Runx1/Tff1/NF-κB axis may be a potential target for the treatment strategy of DR, and further studies are needed.
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Affiliation(s)
- Wei Zhang
- Department of Ophthalmology, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Third Hospital of Shanxi Medical University, Taiyuan, 030012, Shanxi, PR China; Department of Ophthalmology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, PR China.
| | - Dingguo Zhang
- Department of Cardiology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, 210029, Jiangsu, PR China
| | - Yan Cheng
- Department of Nuclear Medicine, First Hospital of Shanxi Medical University, Taiyuan, 030001, Shanxi, PR China
| | - Xing Liang
- Department of Ophthalmology, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Third Hospital of Shanxi Medical University, Taiyuan, 030012, Shanxi, PR China
| | - Jingjing Wang
- Department of Ophthalmology, Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Tongji Shanxi Hospital, Third Hospital of Shanxi Medical University, Taiyuan, 030012, Shanxi, PR China
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5
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Hoffmann W. Trefoil Factor Family (TFF) Peptides and Their Links to Inflammation: A Re-evaluation and New Medical Perspectives. Int J Mol Sci 2021; 22:ijms22094909. [PMID: 34066339 PMCID: PMC8125380 DOI: 10.3390/ijms22094909] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 04/21/2021] [Accepted: 04/21/2021] [Indexed: 12/16/2022] Open
Abstract
Trefoil factor family peptides (TFF1, TFF2, TFF3), together with mucins, are typical exocrine products of mucous epithelia. Here, they act as a gastric tumor suppressor (TFF1) or they play different roles in mucosal innate immune defense (TFF2, TFF3). Minute amounts are also secreted as endocrine, e.g., by the immune and central nervous systems. As a hallmark, TFF peptides have different lectin activities, best characterized for TFF2, but also TFF1. Pathologically, ectopic expression occurs during inflammation and in various tumors. In this review, the role of TFF peptides during inflammation is discussed on two levels. On the one hand, the expression of TFF1-3 is regulated by inflammatory signals in different ways (upstream links). On the other hand, TFF peptides influence inflammatory processes (downstream links). The latter are recognized best in various Tff-deficient mice, which have completely different phenotypes. In particular, TFF2 is secreted by myeloid cells (e.g., macrophages) and lymphocytes (e.g., memory T cells), where it modulates immune reactions triggering inflammation. As a new concept, in addition to lectin-triggered activation, a hypothetical lectin-triggered inhibition of glycosylated transmembrane receptors by TFF peptides is discussed. Thus, TFFs are promising players in the field of glycoimmunology, such as galectins and C-type lectins.
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Affiliation(s)
- Werner Hoffmann
- Institute of Molecular Biology and Medicinal Chemistry, Otto-von-Guericke University Magdeburg, Leipziger Str. 44, 39120 Magdeburg, Germany
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Liu W, Li J, Zhang D, Chen B, Wang X, Zhang X, Xue L. Trefoil factor 1 and gastrokine 2 inhibit Helicobacter pylori-induced proliferation and inflammation in gastric cardia and distal carcinogenesis. Oncol Lett 2020; 20:318. [PMID: 33133254 DOI: 10.3892/ol.2020.12181] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 08/13/2020] [Indexed: 01/04/2023] Open
Abstract
Helicobacter pylori (H. pylori) infection has been associated with non-cardia adenocarcinoma in the stomach, while its role in gastric cardia adenocarcinoma (GCA) remains controversial. In addition, the association between H. pylori and the protective factors trefoil factor 1 (TFF1) and gastrokine 2 (GKN2) in gastroesophageal adenocarcinomas has not been fully investigated. Therefore, the mRNA and protein expression levels of TFF1 and GKN2 in GCA and distal gastric adenocarcinoma (DGA) were analyzed using quantitative PCR (qPCR) and immunohistochemistry, and the association with H. pylori infection was investigated. In addition, the effects of TFF1 and GKN2 overexpression on H. pylori-induced cells were investigated using western blot and reverse transcription-qPCR analysis. The comparative analysis of 16S rRNA-positive mRNA expression between GCA and DGA showed no statistically significant difference. However, the rate of the H. pylori vacuolating toxin A (VacA) genotype was significantly higher in GCA (49.2%) compared with that in DGA (26.9%; P<0.05). H. pylori infection downregulated the mRNA and protein expression levels of TFF1 and GKN2 in gastric tumor tissues, and the mRNA expression level of TFF1 and GKN2 was also markedly decreased in vitro. Furthermore, the cell proliferation varied in H. pylori total protein treatment group with the different doses. Notably, treatment with 20 µg/ml H. pylori total protein for 24 h resulted in the highest cellular proliferation rate. In addition, TFF1 and GKN2 overexpression inversely inhibited H. pylori-induced cell proliferation and upregulated NF-κB, tumor necrosis factor-α, IL-1β, IL-2, IL-4 and IL-6. The results of the present study indicate that H. pylori, particularly the VacA+ strain, plays an important role in GCA pathogenesis in high-risk areas of China, while TFF1/GKN2 inhibits H. pylori-induced cell proliferation and inflammation in GCA and DGA.
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Affiliation(s)
- Wenjing Liu
- Laboratory of Pathology, Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Jie Li
- Department of Hematology, Hebei General Hospital, Shijiazhuang, Hebei 050000, P.R. China
| | - Di Zhang
- Laboratory of Pathology, Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Bao Chen
- Laboratory of Pathology, Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Xiaozi Wang
- Laboratory of Pathology, Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Xianghong Zhang
- Laboratory of Pathology, Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Liying Xue
- Laboratory of Pathology, Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
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Jahan R, Shah A, Kisling SG, Macha MA, Thayer S, Batra SK, Kaur S. Odyssey of trefoil factors in cancer: Diagnostic and therapeutic implications. Biochim Biophys Acta Rev Cancer 2020; 1873:188362. [PMID: 32298747 DOI: 10.1016/j.bbcan.2020.188362] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Revised: 04/01/2020] [Accepted: 04/01/2020] [Indexed: 02/07/2023]
Abstract
Trefoil factors 1, 2, and 3 (TFFs) are a family of small secretory molecules involved in the protection and repair of the gastrointestinal tract (GI). TFFs maintain and restore epithelial structural integrity via transducing key signaling pathways for epithelial cell migration, proliferation, and invasion. In recent years, TFFs have emerged as key players in the pathogenesis of multiple diseases, especially cancer. Initially recognized as tumor suppressors, emerging evidence demonstrates their key role in tumor progression and metastasis, extending their actions beyond protection. However, to date, a comprehensive understanding of TFFs' mechanism of action in tumor initiation, progression and metastasis remains obscure. The present review discusses the structural, functional and mechanistic implications of all three TFF family members in tumor progression and metastasis. Also, we have garnered information from studies on their structure and expression status in different organs, along with lessons from their specific knockout in mouse models. In addition, we highlight the emerging potential of using TFFs as a biomarker to stratify tumors for better therapeutic intervention.
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Affiliation(s)
- Rahat Jahan
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, NE, 68198, USA
| | - Ashu Shah
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, NE, 68198, USA
| | - Sophia G Kisling
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, NE, 68198, USA
| | - Muzafar A Macha
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, NE, 68198, USA; Department of Otolaryngology-Head & Neck Surgery, University of Nebraska Medical Center, NE, 68198, USA; Department of Biotechnology, Central University of Kashmir, Ganderbal, Jammu and Kashmir, India -191201
| | - Sarah Thayer
- Division of Surgical Oncology, Department of Surgery, University of Nebraska Medical Center, NE, 68198, USA; Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, NE, 68198, USA
| | - Surinder K Batra
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, NE, 68198, USA; Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, NE, 68198, USA; Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, NE 68198, USA.
| | - Sukhwinder Kaur
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, NE, 68198, USA.
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Liu X, Huang H, Gao Y, Zhou L, Yang J, Li X, Li Y, Zhao H, Su S, Ke C, Pei Z. Visualization of gene therapy with a liver cancer-targeted adeno-associated virus 3 vector. J Cancer 2020; 11:2192-2200. [PMID: 32127946 PMCID: PMC7052912 DOI: 10.7150/jca.39579] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 01/03/2020] [Indexed: 12/13/2022] Open
Abstract
Background: To evaluate the feasibility of a self-complementing recombinant adeno-associated virus 3 (scrAAV3) vector targeting liver cancer and non-invasively monitor gene therapy of liver cancer. Materials and methods: An scrAAV3-HSV1-TK-kallistatin (ATK) gene drug was constructed, which contained the herpes virus thymidine kinase (HSV1-TK) reporter gene and human endogenous angiogenesis inhibitor (kallistatin) gene for non-invasive imaging of gene expression. Subcutaneous xenografted tumors of hepatoma in nude mice were generated for positron emission tomography/computed tomography (PET/CT) imaging. The ATK group was injected with the ATK gene through the tail vein, and an imaging agent was injected 2 weeks later. PET/CT imaging was performed at 1 hour after injection of the imaging agent. The control group was injected with phosphate-buffered saline at the same volume as the ATK gene drug. HE staining is used for pathological observation of tumor sections. HSV1-TK and kallistatin expression was identified by immunofluorescence, real-time quantitative PCR, and western blotting. Results: Radioactivity on PET/CT images was significantly higher in the ATK group compared with the control group. 18F-FHBG uptake values of left forelegs in ATK and control groups were 0.591±0.151% and 0.017 ± 0.011% ID/g (n=5), respectively (P<0.05). After injection of the ATK gene drug, mRNA and protein expression of HSV1-TK and kallistatin in subcutaneous xenograft tumors was detected successfully. In vitro analysis demonstrated significant differences in the expression of HSV1-TK and kallistatin between ATK and control groups (P<0.05). Conclusions: The scrAAV3 vector has a strong liver cancer-targeting ability, and the ATK gene drug can be used for targeted and non-invasive monitoring of liver cancer gene therapy.
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Affiliation(s)
- Xusheng Liu
- Department of Nuclear Medicine and Institute of Anesthesiology and Pain, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, China
| | - Hanling Huang
- Health management center, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, China
| | - Yan Gao
- Department of Nuclear Medicine and Institute of Anesthesiology and Pain, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, China
| | - Lumeng Zhou
- Postgraduate Training Base of Taihe Hospital, Jinzhou Medical University, Jinzhou, 121000, China
| | - Jianwei Yang
- Postgraduate Training Base of Taihe Hospital, Jinzhou Medical University, Jinzhou, 121000, China
| | - Xiaohui Li
- Department of Nuclear Medicine and Institute of Anesthesiology and Pain, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, China
| | - Yang Li
- Department of Nuclear Medicine and Institute of Anesthesiology and Pain, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, China
| | - Haiwen Zhao
- Department of Nuclear Medicine and Institute of Anesthesiology and Pain, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, China
| | - Shanchun Su
- Department of Nuclear Medicine and Institute of Anesthesiology and Pain, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, China
| | - Changbin Ke
- Department of Nuclear Medicine and Institute of Anesthesiology and Pain, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, China
| | - Zhijun Pei
- Department of Nuclear Medicine and Institute of Anesthesiology and Pain, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, China
- Hubei Key Laboratory of WudangLocal Chinese Medicine Research, Shiyan, 442000, China
- Hubei Key Laboratory of Embryonic Stem Cell Research, Shiyan, 442000, China
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The TFF Peptides xP1 and xP4 Appear in Distinctive Forms in the Xenopus laevis Gastric Mucosa: Indications for Different Protective Functions. Int J Mol Sci 2019; 20:ijms20236052. [PMID: 31801293 PMCID: PMC6929139 DOI: 10.3390/ijms20236052] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 11/13/2019] [Accepted: 11/29/2019] [Indexed: 12/23/2022] Open
Abstract
The gastric secretory trefoil factor family (TFF) peptides xP1 and xP4 are the Xenopus laevis orthologs of mammalian TFF1 and TFF2, respectively. The aim of this study was to analyze the molecular forms of xP1 and xP4 in the X. laevis gastric mucosa by FPLC. xP1 mainly occurred in a monomeric low-molecular-mass form and only a minor subset is associated with the mucus fraction. The occurrence of monomeric xP1 is unexpected because of its odd number of cysteine residues. Probably a conserved acidic residue flanking Cys55 allows monomeric secretion. Furthermore, Cys55 is probably post-translationally modified. For the first time, we hypothesize that the free thiol of monomeric xP1-and probably also its mammalian ortholog TFF1-could have a protective scavenger function, e.g., for reactive oxygen/nitrogen species. In contrast, xP4 mainly occurs in a high-molecular-mass form and is non-covalently bound to a mucin similarly as TFF2. In vitro binding studies with radioactively labeled porcine TFF2 even showed binding to X. laevis gastric mucin. Thus, xP4 is expected to bind as a lectin to an evolutionary conserved sugar epitope of the X. laevis ortholog of mucin MUC6 creating a tight mucus barrier. Taken together, xP1 and xP4 appear to have different gastric protective functions.
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Chen Z, Li Z, Soutto M, Wang W, Piazuelo MB, Zhu S, Guo Y, Maturana MJ, Corvalan AH, Chen X, Xu Z, El-Rifai WM. Integrated Analysis of Mouse and Human Gastric Neoplasms Identifies Conserved microRNA Networks in Gastric Carcinogenesis. Gastroenterology 2019; 156:1127-1139.e8. [PMID: 30502323 PMCID: PMC6409191 DOI: 10.1053/j.gastro.2018.11.052] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 11/20/2018] [Accepted: 11/21/2018] [Indexed: 12/17/2022]
Abstract
BACKGROUND & AIMS microRNAs (miRNAs) are small noncoding RNAs that bind to the 3' untranslated regions of mRNAs to promote their degradation or block their translation. Mice with disruption of the trefoil factor 1 gene (Tff1) develop gastric neoplasms. We studied these mice to identify conserved miRNA networks involved in gastric carcinogenesis. METHODS We performed next-generation miRNA sequencing analysis of normal gastric tissues (based on histology) from patients without evidence of gastric neoplasm (n = 64) and from TFF1-knockout mice (n = 22). We validated our findings using 270 normal gastric tissues (including 61 samples from patients without evidence of neoplastic lesions) and 234 gastric tumor tissues from 3 separate cohorts of patients and from mice. We performed molecular and functional assays using cell lines (MKN28, MKN45, STKM2, and AGS cells), gastric organoids, and mice with xenograft tumors. RESULTS We identified 117 miRNAs that were significantly deregulated in mouse and human gastric tumor tissues compared with nontumor tissues. We validated changes in levels of 6 miRNAs by quantitative real-time polymerase chain reaction analyses of neoplastic gastric tissues from mice (n = 39) and 3 independent patient cohorts (n = 332 patients total). We found levels of MIR135B-5p, MIR196B-5p, and MIR92A-5p to be increased in tumor tissues, whereas levels of MIR143-3p, MIR204-5p, and MIR133-3p were decreased in tumor tissues. Levels of MIR143-3p were reduced not only in gastric cancer tissues but also in normal tissues adjacent to tumors in humans and low-grade dysplasia in mice. Transgenic expression of MIR143-3p in gastric cancer cell lines reduced their proliferation and restored their sensitivity to cisplatin. AGS cells with stable transgenic expression of MIR143-3p grew more slowly as xenograft tumors in mice than control AGS cells; tumor growth from AGS cells that expressed MIR143-3p, but not control cells, was sensitive to cisplatin. We identified and validated bromodomain containing 2 (BRD2) as a direct target of MIR143-3p; increased levels of BRD2 in gastric tumors was associated with shorter survival times for patients. CONCLUSIONS In an analysis of miRNA profiles of gastric tumors from mice and human patients, we identified a conserved signature associated with the early stages of gastric tumorigenesis. Strategies to restore MIR143-3p or inhibit BRD2 might be developed for treatment of gastric cancer.
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Affiliation(s)
- Zheng Chen
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China; Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida
| | - Zheng Li
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Mohammed Soutto
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida; Department of Veterans Affairs, Miami Healthcare System, Miami, Florida
| | - Weizhi Wang
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - M Blanca Piazuelo
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Shoumin Zhu
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida
| | - Yan Guo
- Bioinformatics Shared Resources, University of New Mexico Comprehensive Cancer Center, New Mexico
| | - Maria J Maturana
- Advanced Center for Chronic Diseases, Faculty of Medicine, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - Alejandro H Corvalan
- Advanced Center for Chronic Diseases, Faculty of Medicine, Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - Xi Chen
- Department of Public Health Sciences, Miller School of Medicine, University of Miami, Miami, Florida
| | - Zekuan Xu
- Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China; Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, Nanjing Medical University, Nanjing, China.
| | - Wael M El-Rifai
- Department of Surgery, Miller School of Medicine, University of Miami, Miami, Florida; Department of Veterans Affairs, Miami Healthcare System, Miami, Florida; Sylvester Comprehensive Cancer Center, Miller School of Medicine, University of Miami, Miami, Florida.
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