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Shao G, Liu Y, Lu L, Wang L, Ji G, Xu H. Therapeutic potential of traditional Chinese medicine in the prevention and treatment of digestive inflammatory cancer transformation: Portulaca oleracea L. as a promising drug. JOURNAL OF ETHNOPHARMACOLOGY 2024; 327:117999. [PMID: 38447616 DOI: 10.1016/j.jep.2024.117999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 02/19/2024] [Accepted: 02/28/2024] [Indexed: 03/08/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Traditional Chinese medicine (TCM) has been used for centuries to treat various types of inflammation and tumors of the digestive system. Portulaca oleracea L. (POL), has been used in TCM for thousands of years. The chemical composition of POL is variable and includes flavonoids, alkaloids, terpenoids and organic acids and other classes of natural compounds. Many of these compounds exhibit powerful anti-inflammatory and anti-cancer-transforming effects in the digestive system. AIM OF STUDY In this review, we focus on the potential therapeutic role of POL in NASH, gastritis and colitis and their associated cancers, with a focus on the pharmacological properties and potential mechanisms of action of the main natural active compounds in POL. METHODS The information and data on Portulaca oleracea L. and its main active ingredients were collated from various resources like ethnobotanical textbooks and literature databases such as CNKI, VIP (Chinese literature), PubMed, Science Direct, Elsevier and Google Scholar (English literatures), Wiley, Springer, Tailor and Francis, Scopus, Inflibnet. RESULTS Kaempferol, luteolin, myricetin, quercetin, genistein, EPA, DHA, and melatonin were found to improve NASH and NASH-HCC, while kaempferol, apigenin, luteolin, and quercetin played a therapeutic role in gastritis and gastric cancer. Apigenin, luteolin, myricetin, quercetin, genistein, lupeol, vitamin C and melatonin were found to have therapeutic effects in the treatment of colitis and its associated cancers. The discovery of the beneficial effects of these natural active compounds in POL supports the idea that POL could be a promising novel candidate for the treatment and prevention of inflammation-related cancers of the digestive system. CONCLUSION The discovery of the beneficial effects of these natural active compounds in POL supports the idea that POL could be a promising novel candidate for the treatment and prevention of inflammation-related cancers of the digestive system. However, clinical data describing the mode of action of the naturally active compounds of POL are still lacking. In addition, pharmacokinetic data for POL compounds, such as changes in drug dose and absorption rates, cannot be extrapolated from animal models and need to be measured in patients in clinical trials. On the one hand, a systematic meta-analysis of the existing publications on TCM containing POL still needs to be carried out. On the other hand, studies on the hepatic and renal toxicity of POL are also needed. Additionally, well-designed preclinical and clinical studies to validate the therapeutic effects of TCM need to be performed, thus hopefully providing a basis for the validation of the clinical benefits of POL.
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Affiliation(s)
- Gaoxuan Shao
- Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China; Shanghai Frontiers Science Center of Disease and Syndrome Biology of Inflammatory Cancer Transformation, China
| | - Ying Liu
- Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China; Shanghai Frontiers Science Center of Disease and Syndrome Biology of Inflammatory Cancer Transformation, China
| | - Lu Lu
- Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China; Shanghai Frontiers Science Center of Disease and Syndrome Biology of Inflammatory Cancer Transformation, China
| | - Lei Wang
- Department of Hepatology, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China
| | - Guang Ji
- Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China; Shanghai Frontiers Science Center of Disease and Syndrome Biology of Inflammatory Cancer Transformation, China.
| | - Hanchen Xu
- Institute of Digestive Diseases, Longhua Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200032, China; Shanghai Frontiers Science Center of Disease and Syndrome Biology of Inflammatory Cancer Transformation, China.
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Chen YC, Malfertheiner P, Yu HT, Kuo CL, Chang YY, Meng FT, Wu YX, Hsiao JL, Chen MJ, Lin KP, Wu CY, Lin JT, O'Morain C, Megraud F, Lee WC, El-Omar EM, Wu MS, Liou JM. Global Prevalence of Helicobacter pylori Infection and Incidence of Gastric Cancer Between 1980 and 2022. Gastroenterology 2024; 166:605-619. [PMID: 38176660 DOI: 10.1053/j.gastro.2023.12.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 11/29/2023] [Accepted: 12/21/2023] [Indexed: 01/06/2024]
Abstract
BACKGROUND & AIMS We aimed to assess the secular trend of the global prevalence of Helicobacter pylori (H pylori) infection in adults and children/adolescents and to show its relation to that of gastric cancer incidence. METHODS We performed a systematic review and meta-analysis to calculate overall prevalence, adjusted by multivariate meta-regression analysis. The incidence rates of gastric cancer were derived from the Global Burden of Disease Study and Cancer Incidence in Five Continents. RESULTS Of the 16,976 articles screened, 1748 articles from 111 countries were eligible for analysis. The crude global prevalence of H pylori has reduced from 52.6% (95% confidence interval [CI], 49.6%-55.6%) before 1990 to 43.9% (95% CI, 42.3%-45.5%) in adults during 2015 through 2022, but was as still as high as 35.1% (95% CI, 30.5%-40.1%) in children and adolescents during 2015 through 2022. Secular trend and multivariate regression analyses showed that the global prevalence of H pylori has declined by 15.9% (95% CI, -20.5% to -11.3%) over the last 3 decades in adults, but not in children and adolescents. Significant reduction of H pylori prevalence was observed in adults in the Western Pacific, Southeast Asian, and African regions. However, H pylori prevalence was not significantly reduced in children and adolescents in any World Health Organization regions. The incidence of gastric cancer has decreased globally and in various countries where the prevalence of H pylori infection has declined. CONCLUSIONS The global prevalence of H pylori infection has declined during the last 3 decades in adults, but not in children and adolescents. The results raised the hypothesis that the public health drive to reduce the prevalence of H pylori as a strategy to reduce the incidence of gastric cancer in the population should be confirmed in large-scale clinical trials.
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Affiliation(s)
- Yi-Chu Chen
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Peter Malfertheiner
- Medical Department II, University Hospital, Ludwig-Maximilians-Universität, Munich, Germany; Medical Department Klinik of Gastroenterology, Hepatology and Infectiology, Otto-von-Guericke Universität, Magdeburg, Germany
| | - Hao-Ting Yu
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Chih-Lin Kuo
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Yung-Yueh Chang
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Fan-Tsui Meng
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Yu-Xuan Wu
- Department of Public Health, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Juo-Lun Hsiao
- Department of Medical Imaging, National Taiwan University Hospital, Taipei, Taiwan
| | - Mei-Jyh Chen
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan; Department of Internal Medicine, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Kun-Pei Lin
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan; Department of Internal Medicine, National Taiwan University College of Medicine, Taipei, Taiwan; Department of Geriatrics and Gerontology, National Taiwan University Hospital, Taipei, Taiwan
| | - Chun-Ying Wu
- Institute of Biomedical Informatics, School of Medicine, National YangMing Chiao Tung University, Taipei, Taiwan; Division of Translational Research, Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Jaw-Town Lin
- Department of Internal Medicine, National Taiwan University College of Medicine, Taipei, Taiwan; Department of Internal Medicine, E-DA Hospital and I-Shou University, Kaohsiung, Taiwan
| | - Colm O'Morain
- School of Medicine, Trinity College Dublin, Dublin, Ireland
| | - Francis Megraud
- INSERM U1312 BoRdeaux Institute of onCology (BRIC), University of Bordeaux, Bordeaux, France
| | - Wen-Chung Lee
- Institute of Epidemiology and Preventive Medicine, College of Public Health, National Taiwan University, Taipei, Taiwan
| | - Emad M El-Omar
- UNSW Microbiome Research Centre, St George and Sutherland Clinical Campuses, School of Clinical Medicine, Faculty of Medicine and Health, University of New South Wales, Sydney, New South Wales, Australia
| | - Ming-Shiang Wu
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Jyh-Ming Liou
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan; Department of Internal Medicine, National Taiwan University College of Medicine, Taipei, Taiwan; Department of Internal Medicine, National Taiwan University Cancer Centre, Taipei, Taiwan.
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Abdullah S, Iqbal A, Ashok AK, Kaouche FC, Aslam M, Hussain S, Rahman J, Hayat MM, Ashraf M. Anti-enzymatic and DNA docking studies of montelukast: A multifaceted molecular scaffold with in vitro investigations, molecular expression analysis and molecular dynamics simulations. Heliyon 2024; 10:e24470. [PMID: 38298631 PMCID: PMC10828691 DOI: 10.1016/j.heliyon.2024.e24470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 01/06/2024] [Accepted: 01/09/2024] [Indexed: 02/02/2024] Open
Abstract
Montelukast, an approved leukotriene receptor 1 (Cys-LT 1) antagonist with anti-inflammatory properties is used for the treatment of asthma and allergic rhinitis. In the present studies, montelukast was subjected to in vitro inhibitory assays followed by kinetic and in silico investigations. Montelukast demonstrated inhibitory activity against yeast α-glucosidase (IC50 44.31 ± 1.21 μM), jack bean urease (JB urease, IC50 8.72 ± 0.23 μM), human placental alkaline phosphatase (hPAP, IC50 17.53 ± 0.19 μM), bovine intestinal alkaline phosphatase (bIAP, IC50 15.18 ± 0.23 μM) and soybean 15-lipoxygenase (15-LOX, IC50 2.41 ± 0.13 μM). Kinetic studies against α-glucosidase and urease enzymes revealed its competitive mode of inhibition. Molecular expression analysis of montelukast in breast cancer cell line MCF-7 down-regulated AP by a factor of 0.27 (5 μM) compared with the 0.26 value for standard inhibitor levamisole (10 μM). Molecular docking estimated a binding affinity ranging -8.82 to -15.65 kcal/mol for the enzymes. Docking against the DNA dodecamer (ID: 1BNA) observed -9.13 kcal/mol via minor groove binding. MD simulations suggested stable binding between montelukast and the target proteins predicting strong inhibitory potential of the ligand. Montelukast features a chloroquinoline, phenyl ring, a cyclopropane group, a carboxylic group and a sulfur atom all of which collectively enhance its inhibitory potential against the said enzymes. These in vitro and computational investigations demonstrate that it is possible and suggested that the interactions of montelukast with more than one targets presented herein may be linked with the side effects presented by this drug and necessitate additional work. The results altogether suggest montelukast as an important structural scaffold possessing multitargeted features and warrant further investigations in repurposing beyond its traditional pharmacological use.
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Affiliation(s)
- Shawana Abdullah
- Institute of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
| | - Ambar Iqbal
- Institute of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
- Department of Biochemistry and Molecular Biology, Institute of Biochemistry, Biotechnology & Bioinformatics, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
| | - Avinash Karkada Ashok
- Department of Biotechnology, Siddaganga Institute of Technology, Tumakuru, Karnataka, 572103, India
| | - Farah Chafika Kaouche
- Department of Chemistry, Faculty of Sciences of Mater, Ibn Khaldoun University, BP 78 Zaaoura, 14000, Tiaret, Algeria
| | - Misbah Aslam
- Institute of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
| | - Safdar Hussain
- Institute of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
| | - Jameel Rahman
- Institute of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
| | | | - Muhammad Ashraf
- Institute of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
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Babu AK, Raja MKMM, Zehravi M, Mohammad BD, Anees MI, Prasad C, Yahya BA, Sultana R, Sharma R, Singh J, Khan KA, Siddiqui FA, Khan SL, Emran TB. An overview of polymer surface coated synthetic quantum dots as therapeutics and sensors applications. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2023; 184:1-12. [PMID: 37652186 DOI: 10.1016/j.pbiomolbio.2023.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 08/01/2023] [Accepted: 08/27/2023] [Indexed: 09/01/2023]
Abstract
Quantum dots (QDs) are a class of remarkable materials that have garnered significant attention since their initial discovery. It is noteworthy to mention that it took approximately a decade for these materials to be successfully implemented in practical applications. While QDs have demonstrated notable optical properties, it is important to note that these attributes alone have not rendered them a feasible substitute for traditional organic dyes. Furthermore, it is worth noting that the substance under investigation exhibited inherent toxicity and instability in its initial state, primarily due to the presence of a heavy metal core. In the initial stages of research, it was observed that the integration of nanocomposites had a positive impact on the properties of QDs. The discovery of these nanocomposites was motivated by the remarkable properties exhibited by biocomposites found in nature. Recent discoveries have shed light on the potential utilization of QDs as a viable strategy for drug delivery, offering a promising avenue to enhance the efficacy of current pharmaceuticals and pave the way for the creation of innovative therapeutic approaches. The primary objective of this review was to elucidate the distinctive characteristics that render QDs highly suitable for utilization as nanocarriers. In this study, we will delve into the multifaceted applications of QDs as sensing nanoprobes and their utilization in diverse drug delivery systems. The focus of our investigation was directed toward the utilization of QD/polymer composites in sensing applications, with particular emphasis on their potential as chemical sensors, biosensors, and physical sensors.
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Affiliation(s)
- Ancha Kishore Babu
- Centre of Excellence for Pharmaceutical Sciences, School of Pharmacy, KPJ Healthcare University College, 71800, Nilai, Malaysia
| | - M K Mohan Maruga Raja
- Parul Institute of Pharmacy & Research, Parul University, Vadodara, Gujarat, 391110, India
| | - Mehrukh Zehravi
- Department of Clinical Pharmacy Girls Section, Prince Sattam Bin Abdul Aziz University, Al-Kharj, 11942, Saudi Arabia
| | - Badrud Duza Mohammad
- Department of Pharmaceutical Chemistry, G R T Institute of Pharmaceutical Education and Research, GRT Mahalakshmi Nagar, Tiruttani 631209, Tamil Nadu, India
| | - Mohammed Imran Anees
- Y. B. Chavan College of Pharmacy, Dr. Rafiq Zakaria Campus, Aurangabad, Maharashtra, 431003, India
| | | | - Barrawaz Aateka Yahya
- Y. B. Chavan College of Pharmacy, Dr. Rafiq Zakaria Campus, Aurangabad, Maharashtra, 431003, India
| | - Rokeya Sultana
- Yenepoya Pharmacy College and Research Centre, Yenepoya (Deemed to Be University), Deralakatte, 575022, Mangalore, India
| | - Rohit Sharma
- Department of Rasa Shastra and Bhaishajya Kalpana, Faculty of Ayurveda, Institute of Medical Sciences, Banaras Hindu University, Varanasi, 221005, Uttar Pradesh, India.
| | - Jay Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, 221005, Uttar Pradesh, India
| | - Khalid Ali Khan
- Unit of Bee Research and Honey Production, Research Center for Advanced Materials Science (RCAMS), King Khalid University, P.O. Box 9004, Abha, 61413, Saudi Arabia; Applied College, King Khalid University, P. O. Box 9004, Abha, 61413, Saudi Arabia
| | - Falak A Siddiqui
- Department of Pharmaceutical Chemistry, N.B.S. Institute of Pharmacy, Ausa, 413520, Maharashtra, India; Department of Pharmaceutical Chemistry, School of Pharmacy, Anurag University, Hyderabad, India
| | - Sharuk L Khan
- Department of Pharmaceutical Chemistry, N.B.S. Institute of Pharmacy, Ausa, 413520, Maharashtra, India; Department of Pharmaceutical Chemistry, School of Pharmacy, Anurag University, Hyderabad, India.
| | - Talha Bin Emran
- Department of Pathology and Laboratory Medicine, Warren Alpert Medical School & Legorreta Cancer Center, Brown University, Providence, RI 02912, USA; Department of Pharmacy, Faculty of Allied Health Sciences, Daffodil International University, Dhaka, 1207, Bangladesh.
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Rim CH, Lee WJ, Akhmedov O, Sabirov U, Ten Y, Ziyayev Y, Tillyashaykhov M, Rim JS. Challenges and Suggestions in the Management of Stomach and Colorectal Cancer in Uzbekistan: The Third Report of the Uzbekistan-Korea Oncology Consortium. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:ijerph20085477. [PMID: 37107759 PMCID: PMC10138433 DOI: 10.3390/ijerph20085477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 03/13/2023] [Accepted: 04/04/2023] [Indexed: 05/11/2023]
Abstract
In general, as the national standard of living and life expectancy of people increase, the health burden of cancer also increases. Prevention strategies, including the screening and investigation of the causes of cancer as well as the expansion of treatment infrastructure, are necessary. In this review, we discussed the management strategies for gastric and colorectal cancers in Uzbekistan. Gastrointestinal cancers can be significantly prevented by certain screening strategies such as endoscopic examination. Furthermore, as both cancer types are closely related to the eating habits and lifestyles of people in Uzbekistan, such causes should be investigated and prevented. Practical advice to increase the efficiency of treatment is included, considering the current situation in Uzbekistan. Data from South Korea, which has performed nationwide screening for two decades and has made progress in improving the prognosis of patients with gastrointestinal cancers, will be discussed as a literature control.
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Affiliation(s)
- Chai Hong Rim
- Department of Radiation Oncology, Korea University Ansan Hospital, Korea University, Seoul 15355, Republic of Korea
| | - Won Jae Lee
- Department of Healthcare Management, Gachon University, Seongnam-si 13120, Republic of Korea
| | - Odiljon Akhmedov
- Department of science, Republican Specialized Scientific Practical-Medical Center of Oncology and Radiology, Farobiy Street 383, Tashkent 100179, Uzbekistan
| | - Ulugbek Sabirov
- Ministry of Health of the Republic of Uzbekistan, Tashkent 100011, Uzbekistan
| | - Yakov Ten
- Department of science, Republican Specialized Scientific Practical-Medical Center of Oncology and Radiology, Farobiy Street 383, Tashkent 100179, Uzbekistan
| | - Yakhyo Ziyayev
- Department of science, Republican Specialized Scientific Practical-Medical Center of Oncology and Radiology, Farobiy Street 383, Tashkent 100179, Uzbekistan
| | - Mirzagaleb Tillyashaykhov
- Department of science, Republican Specialized Scientific Practical-Medical Center of Oncology and Radiology, Farobiy Street 383, Tashkent 100179, Uzbekistan
- Correspondence: (M.T.); (J.S.R.); Tel.: +998-712462582 (M.T.); +82-2-2626-1523 (J.S.R.); Fax: +82-2-837-6245 (J.S.R.)
| | - Jae Suk Rim
- Department of Oral and Maxillofacial Surgery, Guro Hospital, Korea University College of Medicine, 148 Gurodong-ro, Guro 2-dong, Guro-gu, Seoul 08308, Republic of Korea
- Correspondence: (M.T.); (J.S.R.); Tel.: +998-712462582 (M.T.); +82-2-2626-1523 (J.S.R.); Fax: +82-2-837-6245 (J.S.R.)
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Innate immune activation and modulatory factors of Helicobacter pylori towards phagocytic and nonphagocytic cells. Curr Opin Immunol 2023; 82:102301. [PMID: 36933362 DOI: 10.1016/j.coi.2023.102301] [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: 11/22/2022] [Accepted: 02/17/2023] [Indexed: 03/18/2023]
Abstract
Helicobacter pylori is an intriguing obligate host-associated human pathogen with a specific host interaction biology, which has been shaped by thousands of years of host-pathogen coevolution. Molecular mechanisms of interaction of H. pylori with the local immune cells in the human system are less well defined than epithelial cell interactions, although various myeloid cells, including neutrophils and other phagocytes, are locally present or attracted to the sites of infection and interact with H. pylori. We have recently addressed the question of novel bacterial innate immune stimuli, including bacterial cell envelope metabolites, that can activate and modulate cell responses via the H. pylori Cag type IV secretion system. This review article gives an overview of what is currently known about the interaction modes and mechanisms of H. pylori with diverse human cell types, with a focus on bacterial metabolites and cells of the myeloid lineage including phagocytic and antigen-presenting cells.
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Saberi S, Esmaeili M, Saghiri R, Shekari F, Mohammadi M. Assessment of the mixed origin of the gastric epithelial extracellular vesicles in acellular transfer of Helicobacter pylori toxins and a systematic review. Microb Pathog 2023; 177:106024. [PMID: 36758823 DOI: 10.1016/j.micpath.2023.106024] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 02/01/2023] [Accepted: 02/03/2023] [Indexed: 02/10/2023]
Abstract
BACKGROUND H. pylori are generally considered as extracellular organisms, with exclusive colonization of the gastric milieu. Yet, several extra gastric manifestations are associated with this infection. The aim of the present study was to investigate the feasibility of toxin transfer by extracellular vesicles, from bacterial and epithelial origins. METHODS Tox-positive H. pylori and its two cagA and vacA mutant strains were used to produce bacterial vesicles (BVs) and to infect AGS cells. The produced BVs and the infected cell vesicles (ICVs) were collected by ultracentrifugation and evaluated by western blotting, DLS and electron microscopy. These two sets of vesicles were applied to a second set of recipient AGS cells, in which the acellular transfer of toxins, IL-8 production and downstream morphologic changes were assessed, by western blotting, ELISA and light microscopy, respectively. RESULTS The BVs were positive for H. pylori membrane markers (BabA and UreB), VacA and CagA toxins, except for from the corresponding mutant strains. The ICVs were larger in size and positive for bacterial markers, as well as epithelial markers of CD9, LGR5, but negative for nuclear (Ki76) or cytoplasmic (β-actin) markers. Bacteria-independent transfer of CagA and VacA into the recipient cells occurred upon treatment of cells with BVs and ICVs, followed by cellular vacuolation and elongation. IL-8 production was induced in recipient AGS cells, treated with BVs (1279.4 ± 19.79 pg/106 cells), early (8 h, 1171.4 ± 11.31 pg/106 cells) and late (48 h, 965.4 ± 36.77 pg/106 cells) ICVs (P < 0.0001). CONCLUSION Our data indicates that ICVs, with mixed bacterial and epithelial constituents, similar to BVs, are capable of transferring bacterial toxins into the recipient cells, inducing IL-8 production and subsequent morphologic changes, in an acellular manner.
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Affiliation(s)
- Samaneh Saberi
- HPGC Research Group, Department of Medical Biotechnology, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Maryam Esmaeili
- HPGC Research Group, Department of Medical Biotechnology, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran
| | - Reza Saghiri
- Department of Biochemistry, Pasteur Institute of Iran, Tehran, Iran
| | - Faezeh Shekari
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran; Advanced Therapy Medicinal Product Technology Development Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Marjan Mohammadi
- HPGC Research Group, Department of Medical Biotechnology, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran.
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Amalia R, Panenggak NSR, Doohan D, Rezkitha YAA, Waskito LA, Syam AF, Lubis M, Yamaoka Y, Miftahussurur M. A comprehensive evaluation of an animal model for Helicobacter pylori-associated stomach cancer: Fact and controversy. Helicobacter 2023; 28:e12943. [PMID: 36627714 DOI: 10.1111/hel.12943] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 11/22/2022] [Accepted: 11/22/2022] [Indexed: 01/12/2023]
Abstract
Even though Helicobacter pylori infection was the most causative factor of gastric cancer, numerous in vivo studies failed to induce gastric cancer using H. pylori infection only. The utilization of established animal studies in cancer research is crucial as they aim to investigate the coincidental association between suspected oncogenes and pathogenesis as well as generate models for the development and testing of potential treatments. The methods to establish gastric cancer using infected animal models remain limited, diverse in methods, and showed different results. This study investigates the differences in animal models, which highlight different pathological results in gaster by literature research. Electronic databases searched were performed in PubMed, Science Direct, and Cochrane, without a period filter. A total of 135 articles were used in this study after a full-text assessment was conducted. The most frequent animal models used for gastric cancer were Mice, while Mongolian gerbils and Transgenic mice were the most susceptible model for gastric cancer associated with H. pylori infection. Additionally, transgenic mice showed that the susceptibility to gastric cancer progression was due to genetic and epigenetic factors. These studies showed that in Mongolian gerbil models, H. pylori could function as a single agent to trigger stomach cancer. However, most gastric cancer susceptibilities were not solely relying on H. pylori infection, and numerous factors are involved in cancer progression. Further study using Mongolian gerbils and Transgenic mice is crucial to conduct and establish the best models for gastric cancer associated H. pylori.
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Affiliation(s)
- Rizki Amalia
- Helicobacter pylori and Microbiota Study Group, Institute of Tropical Disease, Universitas Airlangga, Surabaya, Indonesia
| | - Nur Syahadati Retno Panenggak
- Helicobacter pylori and Microbiota Study Group, Institute of Tropical Disease, Universitas Airlangga, Surabaya, Indonesia
| | - Dalla Doohan
- Helicobacter pylori and Microbiota Study Group, Institute of Tropical Disease, Universitas Airlangga, Surabaya, Indonesia.,Department of Anatomy, Histology and Pharmacology, Faculty of Medicine, Universitas Airlangga, Surabaya, Indonesia
| | - Yudith Annisa Ayu Rezkitha
- Helicobacter pylori and Microbiota Study Group, Institute of Tropical Disease, Universitas Airlangga, Surabaya, Indonesia.,Department of Internal Medicine, Faculty of Medicine, Universitas Muhammadiyah Surabaya, Surabaya, Indonesia
| | - Langgeng Agung Waskito
- Helicobacter pylori and Microbiota Study Group, Institute of Tropical Disease, Universitas Airlangga, Surabaya, Indonesia.,Department of Physiology and Medical Biochemistry, Faculty of Medicine, Universitas Airlangga, Surabaya, Indonesia
| | - Ari Fahrial Syam
- Division of Gastroenterology, Department of Internal Medicine, Faculty of Medicine, University of Indonesia, Jakarta, Indonesia
| | - Masrul Lubis
- Department of Internal Medicine, Faculty of Medicine, Universitas Sumatera Utara, Medan, Indonesia
| | - Yoshio Yamaoka
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu, Japan.,Department of Medicine, Gastroenterology and Hepatology Section, Baylor College of Medicine, Texas, Houston, USA
| | - Muhammad Miftahussurur
- Helicobacter pylori and Microbiota Study Group, Institute of Tropical Disease, Universitas Airlangga, Surabaya, Indonesia.,Division of Gastroentero-Hepatology, Department of Internal Medicine, Faculty of Medicine-Dr. Soetomo Teaching Hospital, Universitas Airlangga, Surabaya, Indonesia
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Wroblewski LE, Peek RM. Clinical Pathogenesis, Molecular Mechanisms of Gastric Cancer Development. Curr Top Microbiol Immunol 2023; 444:25-52. [PMID: 38231214 PMCID: PMC10924282 DOI: 10.1007/978-3-031-47331-9_2] [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] [Indexed: 01/18/2024]
Abstract
The human pathogen Helicobacter pylori is the strongest known risk factor for gastric disease and cancer, and gastric cancer remains a leading cause of cancer-related death across the globe. Carcinogenic mechanisms associated with H. pylori are multifactorial and are driven by bacterial virulence constituents, host immune responses, environmental factors such as iron and salt, and the microbiota. Infection with strains that harbor the cytotoxin-associated genes (cag) pathogenicity island, which encodes a type IV secretion system (T4SS) confer increased risk for developing more severe gastric diseases. Other important H. pylori virulence factors that augment disease progression include vacuolating cytotoxin A (VacA), specifically type s1m1 vacA alleles, serine protease HtrA, and the outer-membrane adhesins HopQ, BabA, SabA and OipA. Additional risk factors for gastric cancer include dietary factors such as diets that are high in salt or low in iron, H. pylori-induced perturbations of the gastric microbiome, host genetic polymorphisms, and infection with Epstein-Barr virus. This chapter discusses in detail host factors and how H. pylori virulence factors augment the risk of developing gastric cancer in human patients as well as how the Mongolian gerbil model has been used to define mechanisms of H. pylori-induced inflammation and cancer.
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Affiliation(s)
- Lydia E Wroblewski
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Richard M Peek
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA.
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10
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Wang H, Zhao M, Shi F, Zheng S, Xiong L, Zheng L. A review of signal pathway induced by virulent protein CagA of Helicobacter pylori. Front Cell Infect Microbiol 2023; 13:1062803. [PMID: 37124036 PMCID: PMC10140366 DOI: 10.3389/fcimb.2023.1062803] [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: 10/06/2022] [Accepted: 03/24/2023] [Indexed: 05/02/2023] Open
Abstract
Gastric cancer (GC), a common and high-mortality disease, still occupies an important position in current cancer research, and Helicobacter pylori (H. pylori) infection as its important risk factor has been a hot and challenging research area. Among the numerous pathogenic factors of H. pylori, the virulence protein CagA has been widely studied as the only bacterial-derived oncoprotein. It was found that CagA entering into gastric epithelial cells (GECs) can induce the dysregulation of multiple cellular pathways such as MAPK signaling pathway, PI3K/Akt signaling pathway, NF-κB signaling pathway, Wnt/β-catenin signaling pathway, JAK-STAT signaling pathway, Hippo signaling pathway through phosphorylation and non-phosphorylation. These disordered pathways cause pathological changes in morphology, adhesion, polarity, proliferation, movement, and other processes of GECs, which eventually promotes the occurrence of GC. With the deepening of H. pylori-related research, the research on CagA-induced abnormal signaling pathway has been updated and deepened to some extent, so the key signaling pathways activated by CagA are used as the main stem to sort out the pathogenesis of CagA in this paper, aiming to provide new strategies for the H. pylori infection and treatment of GC in the future.
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Affiliation(s)
- Haiqiang Wang
- Department of Internal Medicine, First Affiliated Hospital, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Mei Zhao
- Graduate School of Heilongjiang University of Chinese Medicine, Harbin, China
| | - Fan Shi
- Graduate School of Heilongjiang University of Chinese Medicine, Harbin, China
| | - Shudan Zheng
- Graduate School of Heilongjiang University of Chinese Medicine, Harbin, China
| | - Li Xiong
- Graduate School of Heilongjiang University of Chinese Medicine, Harbin, China
| | - Lihong Zheng
- Department of Internal Medicine, Fourth Affiliated Hospital, Heilongjiang University of Chinese Medicine, Harbin, China
- *Correspondence: Lihong Zheng,
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11
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Hara D, Okamura T, Iwaya Y, Nagaya T, Ota H, Umemura T. Histopathologically defined intestinal metaplasia in lesser curvature of corpus prior to Helicobacter pylori eradication is a risk factor for gastric cancer development. Helicobacter 2022; 27:e12934. [PMID: 36263778 DOI: 10.1111/hel.12934] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 09/09/2022] [Accepted: 10/06/2022] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND AIM Helicobacter pylori eradication has been shown to reduce the risk of gastric cancer (GC), with the number of eradication therapy cases on the rise. However, GC can still occur after successful treatment, and the histological differences prior to eradication in patients with and without GC are unclear. This study investigated the pre-treatment histological risk factors for GC development following eradication therapy. METHODS We retrospectively enrolled consecutive adult patients diagnosed as having H. pylori infection between April 2004 and December 2018. Atrophy and intestinal metaplasia (IM) were histologically assessed according to the updated Sydney System. The operative link on gastritis assessment and the operative link on gastric intestinal metaplasia (OLGIM) were evaluated as well. RESULTS Of the 247 patients analyzed in this study, 11 (4.5%) experienced GC after eradication therapy. Histological IM scores in the GC group were significantly higher at all gastric biopsy sites (p < .05), and the proportion of OLGIM III/IV stage was significantly greater in GC patients (81.8% vs. 31.8%, p < .01). For GC prediction, the area under the receiver operating characteristic curve for IM score at the lesser curvature of the corpus was the highest among all biopsy sites and not inferior to OLGIM results. CONCLUSIONS Patients with histological IM prior to H. pylori eradication, especially at the lesser curvature of the corpus, may be at elevated risk for GC development after eradication therapy and require close surveillance.
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Affiliation(s)
- Daichi Hara
- Department of Gastroenterology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Takuma Okamura
- Department of Gastroenterology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Yugo Iwaya
- Department of Gastroenterology, Shinshu University School of Medicine, Matsumoto, Japan.,Department of Advanced Therapeutic Endoscopy, Shinshu University School of Medicine, Matsumoto, Japan
| | - Tadanobu Nagaya
- Endoscopic Examination Center, Shinshu University Hospital, Matsumoto, Japan
| | - Hiroyoshi Ota
- Department of Laboratory Sciences, School of Health Sciences, Shinshu University, Matsumoto, Japan
| | - Takeji Umemura
- Department of Gastroenterology, Shinshu University School of Medicine, Matsumoto, Japan.,Department of Advanced Therapeutic Endoscopy, Shinshu University School of Medicine, Matsumoto, Japan
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12
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Freire de Melo F, Marques HS, Rocha Pinheiro SL, Lemos FFB, Silva Luz M, Nayara Teixeira K, Souza CL, Oliveira MV. Influence of Helicobacter pylori oncoprotein CagA in gastric cancer: A critical-reflective analysis. World J Clin Oncol 2022; 13:866-879. [PMID: 36483973 PMCID: PMC9724182 DOI: 10.5306/wjco.v13.i11.866] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 09/20/2022] [Accepted: 10/11/2022] [Indexed: 11/21/2022] Open
Abstract
Gastric cancer is the fifth most common malignancy and third leading cancer-related cause of death worldwide. Helicobacter pylori is a Gram-negative bacterium that inhabits the gastric environment of 60.3% of the world’s population and represents the main risk factor for the onset of gastric neoplasms. CagA is the most important virulence factor in H. pylori, and is a translocated oncoprotein that induces morphofunctional modifications in gastric epithelial cells and a chronic inflammatory response that increases the risk of developing precancerous lesions. Upon translocation and tyrosine phosphorylation, CagA moves to the cell membrane and acts as a pathological scaffold protein that simultaneously interacts with multiple intracellular signaling pathways, thereby disrupting cell proliferation, differentiation and apoptosis. All these alterations in cell biology increase the risk of damaged cells acquiring pro-oncogenic genetic changes. In this sense, once gastric cancer sets in, its perpetuation is independent of the presence of the oncoprotein, characterizing a “hit-and-run” carcinogenic mechanism. Therefore, this review aims to describe H. pylori- and CagA-related oncogenic mechanisms, to update readers and discuss the novelties and perspectives in this field.
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Affiliation(s)
- Fabrício Freire de Melo
- Instituto Multidisciplinar em Saúde, Universidade Federal da Bahia, Vitória da Conquista 45029-094, Brazil
| | - Hanna Santos Marques
- Campus Vitória da Conquista, Universidade Estadual do Sudoeste da Bahia, Vitória da Conquista 45029-094, Brazil
| | - Samuel Luca Rocha Pinheiro
- Instituto Multidisciplinar em Saúde, Universidade Federal da Bahia, Vitória da Conquista 45029-094, Brazil
| | - Fabian Fellipe Bueno Lemos
- Instituto Multidisciplinar em Saúde, Universidade Federal da Bahia, Vitória da Conquista 45029-094, Brazil
| | - Marcel Silva Luz
- Instituto Multidisciplinar em Saúde, Universidade Federal da Bahia, Vitória da Conquista 45029-094, Brazil
| | | | - Cláudio Lima Souza
- Instituto Multidisciplinar em Saúde, Universidade Federal da Bahia, Vitória da Conquista 45029-094, Brazil
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13
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Kapsetaki SE, Marquez Alcaraz G, Maley CC, Whisner CM, Aktipis A. Diet, Microbes, and Cancer Across the Tree of Life: a Systematic Review. Curr Nutr Rep 2022; 11:508-525. [PMID: 35704266 PMCID: PMC9197725 DOI: 10.1007/s13668-022-00420-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/21/2022] [Indexed: 11/09/2022]
Abstract
PURPOSE OF REVIEW Cancers are a leading cause of death in humans and for many other species. Diet has often been associated with cancers, and the microbiome is an essential mediator between diet and cancers. Here, we review the work on cancer and the microbiome across species to search for broad patterns of susceptibility associated with different microbial species. RECENT FINDINGS Some microbes, such as Helicobacter bacteria, papillomaviruses, and the carnivore-associated Fusobacteria, consistently induce tumorigenesis in humans and other species. Other microbes, such as the milk-associated Lactobacillus, consistently inhibit tumorigenesis in humans and other species. We systematically reviewed over a thousand published articles and identified links between diet, microbes, and cancers in several species of mammals, birds, and flies. Future work should examine a larger variety of host species to discover new model organisms for human preclinical trials, to better understand the observed variance in cancer prevalence across species, and to discover which microbes and diets are associated with cancers across species. Ultimately, this could help identify microbial and dietary interventions to diagnose, prevent, and treat cancers in humans as well as other animals.
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Affiliation(s)
- Stefania E Kapsetaki
- Arizona Cancer Evolution Center, Biodesign Institute and School of Life Sciences, Arizona State University, Tempe, AZ, USA.
- Biodesign Center for Biocomputing, Security and Society, Arizona State University, Tempe, USA.
| | - Gissel Marquez Alcaraz
- Arizona Cancer Evolution Center, Biodesign Institute and School of Life Sciences, Arizona State University, Tempe, AZ, USA
- Biodesign Center for Biocomputing, Security and Society, Arizona State University, Tempe, USA
| | - Carlo C Maley
- Arizona Cancer Evolution Center, Biodesign Institute and School of Life Sciences, Arizona State University, Tempe, AZ, USA
- Biodesign Center for Biocomputing, Security and Society, Arizona State University, Tempe, USA
| | - Corrie M Whisner
- College of Health Solutions, Arizona State University, Phoenix, AZ, USA
- Biodesign Center for Health Through Microbiomes, Arizona State University, Tempe, AZ, USA
| | - Athena Aktipis
- Arizona Cancer Evolution Center, Biodesign Institute and School of Life Sciences, Arizona State University, Tempe, AZ, USA
- Department of Psychology, Arizona State University, Tempe, AZ, USA
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14
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Ansari S, Yamaoka Y. Animal Models and Helicobacter pylori Infection. J Clin Med 2022; 11:jcm11113141. [PMID: 35683528 PMCID: PMC9181647 DOI: 10.3390/jcm11113141] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 05/25/2022] [Accepted: 05/25/2022] [Indexed: 02/06/2023] Open
Abstract
Helicobacter pylori colonize the gastric mucosa of at least half of the world’s population. Persistent infection is associated with the development of gastritis, peptic ulcer disease, and an increased risk of gastric cancer and gastric-mucosa-associated lymphoid tissue (MALT) lymphoma. In vivo studies using several animal models have provided crucial evidence for understanding the pathophysiology of H. pylori-associated complications. Numerous animal models, such as Mongolian gerbils, transgenic mouse models, guinea pigs, and other animals, including non-human primates, are being widely used due to their persistent association in causing gastric complications. However, finding suitable animal models for in vivo experimentation to understand the pathophysiology of gastric cancer and MALT lymphoma is a complicated task. In this review, we summarized the most appropriate and latest information in the scientific literature to understand the role and importance of H. pylori infection animal models.
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Affiliation(s)
- Shamshul Ansari
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu 879-5593, Oita, Japan;
| | - Yoshio Yamaoka
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, Yufu 879-5593, Oita, Japan;
- Department of Medicine, Gastroenterology and Hepatology Section, Baylor College of Medicine, Houston, TX 77030, USA
- Institute of Tropical Disease, Universitas Airlangga, Surabaya 60115, Indonesia
- Correspondence: ; Tel.: +81-97-586-5740
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15
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Comparing Diagnostic Accuracy of the fliD Gene and the glmM Gene in Helicobacter pylori. Jundishapur J Microbiol 2022. [DOI: 10.5812/jjm-121476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background: Helicobacter pylori (H. pylori) is one of the most common human bacterial infections, accounting for the infection of half of the world's population. The polymerase chain reaction (PCR) has high specificity and sensitivity in diagnosing this bacterial infection. Objectives: The present study aimed to compare the sensitivity and specificity of the fliD gene and the most widely used glmM gene in the PCR technique. Methods: The research population encompassed patients with indications for upper endoscopy. This cross-sectional study compared the sensitivity and specificity of a proposed gene (fliD) with the most widely used glmM gene to detect the H. pylori infection in tissue samples. Results: The participants encompassed ninety-nine participants aged above 18 years. Their median age was 45.92 ± 13.63 years. The most common complaints of the patients were epigastric pain and heartburn. Our described gold standard detected 61.6% and 38.4% as positive and negative, respectively. The sensitivity and specificity were 72.1% and 100.0% for the routine PCR (glmM gene) and 80.3% and 94.7% for the proposed PCR (fliD gene). Conclusions: Different genes have been used to detect H. pylori in PCR. The glmM gene is easily used to diagnose the H. pylori infection; however, according to the present findings, the fliD gene has higher sensitivity than the glmM gene. Accordingly, the former can be used as a screening gene for the H. pylori infection in the PCR technique.
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16
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Noto JM, Piazuelo MB, Shah SC, Romero-Gallo J, Hart JL, Di C, Carmichael JD, Delgado AG, Halvorson AE, Greevy RA, Wroblewski LE, Sharma A, Newton AB, Allaman MM, Wilson KT, Washington MK, Calcutt MW, Schey KL, Cummings BP, Flynn CR, Zackular JP, Peek RM. Iron deficiency linked to altered bile acid metabolism promotes Helicobacter pylori-induced inflammation-driven gastric carcinogenesis. J Clin Invest 2022; 132:e147822. [PMID: 35316215 PMCID: PMC9106351 DOI: 10.1172/jci147822] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 03/16/2022] [Indexed: 12/24/2022] Open
Abstract
Gastric carcinogenesis is mediated by complex interactions among Helicobacter pylori, host, and environmental factors. Here, we demonstrate that H. pylori augmented gastric injury in INS-GAS mice under iron-deficient conditions. Mechanistically, these phenotypes were not driven by alterations in the gastric microbiota; however, discovery-based and targeted metabolomics revealed that bile acids were significantly altered in H. pylori-infected mice with iron deficiency, with significant upregulation of deoxycholic acid (DCA), a carcinogenic bile acid. The severity of gastric injury was further augmented when H. pylori-infected mice were treated with DCA, and, in vitro, DCA increased translocation of the H. pylori oncoprotein CagA into host cells. Conversely, bile acid sequestration attenuated H. pylori-induced injury under conditions of iron deficiency. To translate these findings to human populations, we evaluated the association between bile acid sequestrant use and gastric cancer risk in a large human cohort. Among 416,885 individuals, a significant dose-dependent reduction in risk was associated with cumulative bile acid sequestrant use. Further, expression of the bile acid receptor transmembrane G protein-coupled bile acid receptor 5 (TGR5) paralleled the severity of carcinogenic lesions in humans. These data demonstrate that increased H. pylori-induced injury within the context of iron deficiency is tightly linked to altered bile acid metabolism, which may promote gastric carcinogenesis.
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Affiliation(s)
- Jennifer M Noto
- Division of Gastroenterology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - M Blanca Piazuelo
- Division of Gastroenterology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Shailja C Shah
- Division of Gastroenterology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Judith Romero-Gallo
- Division of Gastroenterology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | | | - Chao Di
- Division of Protective Immunity, and
- Department of Biomedical and Health Informatics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - James D Carmichael
- Department of Biochemistry, Mass Spectrometry Research Center Laboratory, Vanderbilt University, Nashville, Tennessee, USA
| | - Alberto G Delgado
- Division of Gastroenterology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Alese E Halvorson
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Robert A Greevy
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Lydia E Wroblewski
- Division of Gastroenterology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Ayushi Sharma
- Creighton University School of Medicine, Omaha, Nebraska, USA
| | | | - Margaret M Allaman
- Division of Gastroenterology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Keith T Wilson
- Division of Gastroenterology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, Tennessee, USA
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - M Kay Washington
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - M Wade Calcutt
- Department of Biochemistry, Mass Spectrometry Research Center Laboratory, Vanderbilt University, Nashville, Tennessee, USA
| | - Kevin L Schey
- Department of Biochemistry, Mass Spectrometry Research Center Laboratory, Vanderbilt University, Nashville, Tennessee, USA
| | - Bethany P Cummings
- Department of Surgery, University of California, Davis, Davis, California, USA
| | - Charles R Flynn
- Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Joseph P Zackular
- Division of Protective Immunity, and
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Richard M Peek
- Division of Gastroenterology, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
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17
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Ozeki K, Furuta T, Hada K, Wakiya Y, Ojima T. Relationship of the Difficulty of Helicobacter pylori Eradication with Drinking Habits and Allergic Disease. Microorganisms 2022; 10:1029. [PMID: 35630471 PMCID: PMC9147128 DOI: 10.3390/microorganisms10051029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Revised: 05/04/2022] [Accepted: 05/12/2022] [Indexed: 12/10/2022] Open
Abstract
Eradication of Helicobacter pylori (H. pylori) is crucial to reduce the risk of developing gastric ulcers and gastric cancer. Although immunoglobulin E (IgE) levels and alcohol consumption have been shown to influence the failure of H. pylori eradication, the relationship between these factors and the mechanism of failure has not been clarified. Because high IgE levels are associated with eradication failure, the purpose of this study was to clarify the factors leading to high IgE levels. Completed questionnaires and blood test data were collected from patients who visited a university hospital for H. pylori eradication. Logistic regression analysis was per-formed to examine the relationship between high IgE levels and allergic diseases. We also examined the relationship between alcohol intake and high IgE levels. Linear regression analysis was performed on the relationship between the amount of alcohol consumed and IgE measurements. The results showed that patients with allergic diseases and those with high alcohol intake had significantly higher IgE levels. High IgE levels are a risk factor for failure of H. pylori eradication that is associated with drinking habits and alcohol consumption, and our results suggest that daily alcohol consumption should be avoided even in non-allergic patients.
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Affiliation(s)
- Kayoko Ozeki
- Laboratory of Pharmacy Practice and Sciences, Aichi Gakuin University, Nagoya 4648650, Aichi, Japan; (K.H.); (Y.W.)
- Department of Community Health and Preventive Medicine, Hamamatsu University School of Medicine, Hamamatsu 4313192, Shizuoka, Japan;
| | - Takahisa Furuta
- Center for Clinical Research, Hamamatsu University School of Medicine, Hamamatsu 4313192, Shizuoka, Japan;
| | - Kazuhiro Hada
- Laboratory of Pharmacy Practice and Sciences, Aichi Gakuin University, Nagoya 4648650, Aichi, Japan; (K.H.); (Y.W.)
| | - Yoshifumi Wakiya
- Laboratory of Pharmacy Practice and Sciences, Aichi Gakuin University, Nagoya 4648650, Aichi, Japan; (K.H.); (Y.W.)
| | - Toshiyuki Ojima
- Department of Community Health and Preventive Medicine, Hamamatsu University School of Medicine, Hamamatsu 4313192, Shizuoka, Japan;
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18
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Establishment of Noninvasive Methods for the Detection of Helicobacter pylori in Mongolian Gerbils and Application of Main Laboratory Gerbil Populations in China. BIOMED RESEARCH INTERNATIONAL 2022; 2022:6036457. [PMID: 35392259 PMCID: PMC8983185 DOI: 10.1155/2022/6036457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 01/20/2022] [Accepted: 02/15/2022] [Indexed: 11/17/2022]
Abstract
Identifying Helicobacter pylori (H. pylori, Hp) infection in animals before and after artificial infection influences the subsequent experiment. We established effective and noninvasive detection methods, including the gastric fluid nested polymerase chain reaction (PCR) method and the 13C-urea breath test, which can detect Hp before modeling Hp infection in Mongolian gerbils. We designed a gas collection equipment for gerbils. Hp nested PCR was also performed on gastric fluid, gastric mucosa, duodenal contents, and faeces of gerbils challenged with Hp. Conventional Hp detection methods, including rapid urease assay and immunohistochemistry, were compared. Moreover, we assessed the natural infection of Hp in 135 gerbils that had never been exposed to Hp artificially from the major laboratory gerbil groups in China. In 10 Hp infected gerbils, the positive detection results were 100%, 100%, 90%, and 10% in gastric fluid, gastric mucosa, duodenal contents, and faeces with nested PCR, respectively. A rapid urease test performed on gastric mucosa showed that all animals were infected with Hp. Immunohistochemical detection and bacteria culture of gastric mucosa samples that were positive by the nested PCR method also confirmed the presence of Hp. 9% (3/35) and 6% (2/31) natural infection rates were found in conventional gerbil groups from the Capital Medical University and Zhejiang Laboratory Animal Center. In conclusion, we established two noninvasive Hp detection methods that can be performed before modelingHp infection, including the gastric fluid nested PCR method and the 13C-urea breath test.
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19
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Comparative Genomic Analysis of Statistically Significant Genomic Islands of Helicobacter pylori strains for better understanding the disease prognosis. Biosci Rep 2022; 42:230988. [PMID: 35258077 PMCID: PMC8935386 DOI: 10.1042/bsr20212084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 02/25/2022] [Accepted: 03/07/2022] [Indexed: 11/17/2022] Open
Abstract
Bacterial virulence factors are often located in their genomic islands (GIs). Helicobacter pylori, a highly diverse organism is reported to be associated with several gastrointestinal diseases like, gastritis, gastric cancer, peptic ulcer, duodenal ulcer etc. A novel similarity score-based comparative analysis with GIs of fifty H. pylori strains revealed clear idea of the various factors which promote disease progression. Two putative pathogenic GIs in some of the H. pylori strains were identified. One GI, having a putative labile enterotoxin and other dynamin-like proteins (DLPs), is predicted to increase the release of toxin by membrane vesicular formation. Another island contains a virulence-associated protein D (vapD) which is a component of a type-II toxin-antitoxin system (TAs), leads to enhance the severity of the H. pylori infection. Besides the well-known virulence factors like CagA, and VacA, several GIs have been identified which showed to have direct or indirect impact on H. pylori clinical outcomes. One such GI, containing lipopolysaccharide (LPS) biosynthesis genes was revealed to be directly connected with disease development by inhibiting the immune response. Another collagenase-containing GI worsens ulcers by slowing down the healing process. GI consisted of fliD operon was found to be connected to flagellar assembly and biofilm production. By residing in biofilms, bacteria can avoid antibiotic therapy, resulting in chronic infection. Along with well-studied CagA and VacA virulent genes, it is equally important to study these identified virulence factors for better understanding H. pylori induced disease prognosis.
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20
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Mabe K, Inoue K, Kamada T, Kato K, Kato M, Haruma K. Endoscopic screening for gastric cancer in Japan: Current status and future perspectives. Dig Endosc 2022; 34:412-419. [PMID: 34143908 DOI: 10.1111/den.14063] [Citation(s) in RCA: 31] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 06/15/2021] [Accepted: 06/17/2021] [Indexed: 12/18/2022]
Abstract
The revised 2014 Japanese Guidelines for Gastric Cancer Screening approved gastric endoscopy for use in population-based screening. Thus, it is expected that gastric cancer will be detected earlier, and gastric cancer mortality further decreased, with the widespread use of endoscopy and Helicobacter pylori eradication therapy. However, due to an increasingly aging population and relatively low gastric cancer screening rates, gastric cancer remains the leading cause of cancer death in Japan. While the era of endoscopic gastric cancer screening has begun, it does present challenges, such as limited/varying regional availability of endoscopists. This review describes the history of gastric cancer screening in Japan, achievements in endoscopic gastric cancer screening in Japan and Korea, efforts underway to improve screening by stratifying individuals according to gastric cancer risk, and initiatives by the Japan Gastroenterological Endoscopy Society aimed at improving screening, including the implementation of a board certification program for screening endoscopists.
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Affiliation(s)
- Katsuhiro Mabe
- Junpukai Health Maintenance Center-Kurashiki, Okayama, Japan
| | | | - Tomoari Kamada
- Department of Health Care Medicine, Kawasaki Medical School, Okayama, Japan
| | - Katsuaki Kato
- Cancer Detection Center, Miyagi Cancer Society, Miyagi, Japan
| | - Mototsugu Kato
- National Hospital Organization Hakodate National Hospital, Hokkaido, Japan
| | - Ken Haruma
- Junpukai Health Maintenance Center, Okayama, Japan.,Division of Gastroenterology, Department of Internal Medicine 2, Kawasaki Medical School, Okayama, Japan
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21
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Desai S, Dharavath B, Manavalan S, Rane A, Redhu A, Sunder R, Butle A, Mishra R, Joshi A, Togar T, Apte S, Bala P, Chandrani P, Chopra S, Bashyam M, Banerjee A, Prabhash K, Nair S, Dutt A. Fusobacterium nucleatum is associated with inflammation and poor survival in early-stage HPV-negative tongue cancer. NAR Cancer 2022; 4:zcac006. [PMID: 35252868 PMCID: PMC8894079 DOI: 10.1093/narcan/zcac006] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 02/03/2022] [Accepted: 02/16/2022] [Indexed: 02/05/2023] Open
Abstract
Persistent pathogen infection is a known cause of malignancy, although with sparse systematic evaluation across tumor types. We present a comprehensive landscape of 1060 infectious pathogens across 239 whole exomes and 1168 transcriptomes of breast, lung, gallbladder, cervical, colorectal, and head and neck tumors. We identify known cancer-associated pathogens consistent with the literature. In addition, we identify a significant prevalence of Fusobacterium in head and neck tumors, comparable to colorectal tumors. The Fusobacterium-high subgroup of head and neck tumors occurs mutually exclusive to human papillomavirus, and is characterized by overexpression of miRNAs associated with inflammation, elevated innate immune cell fraction and nodal metastases. We validate the association of Fusobacterium with the inflammatory markers IL1B, IL6 and IL8, miRNAs hsa-mir-451a, hsa-mir-675 and hsa-mir-486-1, and MMP10 in the tongue tumor samples. A higher burden of Fusobacterium is also associated with poor survival, nodal metastases and extracapsular spread in tongue tumors defining a distinct subgroup of head and neck cancer.
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Affiliation(s)
- Sanket Desai
- Integrated Cancer Genomics Laboratory, Advanced Centre for Treatment, Research, and Education in Cancer, Kharghar, Navi Mumbai 410210, Maharashtra, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, Maharashtra, India
| | - Bhasker Dharavath
- Integrated Cancer Genomics Laboratory, Advanced Centre for Treatment, Research, and Education in Cancer, Kharghar, Navi Mumbai 410210, Maharashtra, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, Maharashtra, India
| | - Sujith Manavalan
- Integrated Cancer Genomics Laboratory, Advanced Centre for Treatment, Research, and Education in Cancer, Kharghar, Navi Mumbai 410210, Maharashtra, India
| | - Aishwarya Rane
- Integrated Cancer Genomics Laboratory, Advanced Centre for Treatment, Research, and Education in Cancer, Kharghar, Navi Mumbai 410210, Maharashtra, India
| | - Archana Kumari Redhu
- Integrated Cancer Genomics Laboratory, Advanced Centre for Treatment, Research, and Education in Cancer, Kharghar, Navi Mumbai 410210, Maharashtra, India
| | - Roma Sunder
- Integrated Cancer Genomics Laboratory, Advanced Centre for Treatment, Research, and Education in Cancer, Kharghar, Navi Mumbai 410210, Maharashtra, India
| | - Ashwin Butle
- Integrated Cancer Genomics Laboratory, Advanced Centre for Treatment, Research, and Education in Cancer, Kharghar, Navi Mumbai 410210, Maharashtra, India
| | - Rohit Mishra
- Integrated Cancer Genomics Laboratory, Advanced Centre for Treatment, Research, and Education in Cancer, Kharghar, Navi Mumbai 410210, Maharashtra, India
| | - Asim Joshi
- Integrated Cancer Genomics Laboratory, Advanced Centre for Treatment, Research, and Education in Cancer, Kharghar, Navi Mumbai 410210, Maharashtra, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, Maharashtra, India
| | - Trupti Togar
- Integrated Cancer Genomics Laboratory, Advanced Centre for Treatment, Research, and Education in Cancer, Kharghar, Navi Mumbai 410210, Maharashtra, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, Maharashtra, India
| | - Shruti Apte
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, Maharashtra, India
| | - Pratyusha Bala
- Laboratory of Molecular Oncology, Centre for DNA Fingerprinting and Diagnostics, Hyderabad500039, Telangana, India
| | - Pratik Chandrani
- Integrated Cancer Genomics Laboratory, Advanced Centre for Treatment, Research, and Education in Cancer, Kharghar, Navi Mumbai 410210, Maharashtra, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, Maharashtra, India
| | - Supriya Chopra
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, Maharashtra, India
- Department of Radiation Oncology, Advanced Centre for Treatment, Research, and Education in Cancer, Kharghar, Navi Mumbai 410210, Maharashtra, India
| | - Murali Dharan Bashyam
- Laboratory of Molecular Oncology, Centre for DNA Fingerprinting and Diagnostics, Hyderabad500039, Telangana, India
| | - Anirban Banerjee
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai 400076, Maharashtra, India
| | - Kumar Prabhash
- Department of Medical Oncology, Tata Memorial Centre, Ernest Borges Marg, Parel, Mumbai 400012, Maharashtra, India
| | - Sudhir Nair
- Division of Head and Neck Oncology, Department of Surgical Oncology, Tata Memorial Hospital, Tata Memorial Centre, Mumbai 400012, Maharashtra, India
| | - Amit Dutt
- To whom correspondence should be addressed. Tel: +91 22 27405056/30435056;
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22
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Enterobacteria impair host p53 tumor suppressor activity through mRNA destabilization. Oncogene 2022; 41:2173-2186. [PMID: 35197571 PMCID: PMC8993692 DOI: 10.1038/s41388-022-02238-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 01/24/2022] [Accepted: 02/08/2022] [Indexed: 11/25/2022]
Abstract
Increasing evidence highlights the role of bacteria in the physiopathology of cancer. However, the underlying molecular mechanisms remains poorly understood. Several cancer-associated bacteria have been shown to produce toxins which interfere with the host defense against tumorigenesis. Here, we show that lipopolysaccharides from Klebsiella pneumoniae and other Enterobacteria strongly inhibit the host tumor suppressor p53 pathway through a novel mechanism of p53 regulation. We found that lipopolysaccharides destabilize TP53 mRNA through a TLR4-NF-κB-mediated inhibition of the RNA-binding factor Wig-1. Importantly, we show that K. pneumoniae disables two major tumor barriers, oncogene-induced DNA damage signaling and senescence, by impairing p53 transcriptional activity upon DNA damage and oncogenic stress. Furthermore, we found an inverse correlation between the levels of TLR4 and p53 mutation in colorectal tumors. Hence, our data suggest that the repression of p53 by Enterobacteria via TLR4 alleviates the selection pressure for p53 oncogenic mutations and shapes the genomic evolution of cancer.
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23
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The H. pylori CagA Oncoprotein Induces DNA Double Strand Breaks through Fanconi Anemia Pathway Downregulation and Replication Fork Collapse. Int J Mol Sci 2022; 23:ijms23031661. [PMID: 35163588 PMCID: PMC8836099 DOI: 10.3390/ijms23031661] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 01/15/2022] [Accepted: 01/18/2022] [Indexed: 01/27/2023] Open
Abstract
The proteins from the Fanconi Anemia (FA) pathway of DNA repair maintain DNA replication fork integrity by preventing the unscheduled degradation of nascent DNA at regions of stalled replication forks. Here, we ask if the bacterial pathogen H. pylori exploits the fork stabilisation machinery to generate double stand breaks (DSBs) and genomic instability. Specifically, we study if the H. pylori virulence factor CagA generates host genomic DSBs through replication fork destabilisation and collapse. An inducible gastric cancer model was used to examine global CagA-dependent transcriptomic and proteomic alterations, using RNA sequencing and SILAC-based mass spectrometry, respectively. The transcriptional alterations were confirmed in gastric cancer cell lines infected with H. pylori. Functional analysis was performed using chromatin fractionation, pulsed-field gel electrophoresis (PFGE), and single molecule DNA replication/repair fiber assays. We found a core set of 31 DNA repair factors including the FA genes FANCI, FANCD2, BRCA1, and BRCA2 that were downregulated following CagA expression. H. pylori infection of gastric cancer cell lines showed downregulation of the aforementioned FA genes in a CagA-dependent manner. Consistent with FA pathway downregulation, chromatin purification studies revealed impaired levels of Rad51 but higher recruitment of the nuclease MRE11 on the chromatin of CagA-expressing cells, suggesting impaired fork protection. In line with the above data, fibre assays revealed higher fork degradation, lower fork speed, daughter strands gap accumulation, and impaired re-start of replication forks in the presence of CagA, indicating compromised genome stability. By downregulating the expression of key DNA repair genes such as FANCI, FANCD2, BRCA1, and BRCA2, H. pylori CagA compromises host replication fork stability and induces DNA DSBs through fork collapse. These data unveil an intriguing example of a bacterial virulence factor that induces genomic instability by interfering with the host replication fork stabilisation machinery.
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24
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Advances in the Aetiology & Endoscopic Detection and Management of Early Gastric Cancer. Cancers (Basel) 2021; 13:cancers13246242. [PMID: 34944861 PMCID: PMC8699285 DOI: 10.3390/cancers13246242] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 12/06/2021] [Accepted: 12/10/2021] [Indexed: 12/24/2022] Open
Abstract
Simple Summary Gastric adenocarcinoma has remained a highly lethal disease. Awareness and recognition of preneoplastic conditions (including gastric atrophy and intestinal metaplasia) using high-resolution white-light endoscopy as well as chromoendoscopy is therefore essential. Helicobacter pylori, a class I carcinogen, remains the main contributor to the development of sporadic distal gastric neoplasia. Management of early gastric neoplasia with endoscopic resections should be in line with standard indications. A multidisciplinary approach to any case of an early gastric neoplasia is imperative. Hereditary forms of gastric cancer require a tailored approach and individua-lized surveillance. Abstract The mortality rates of gastric carcinoma remain high, despite the progress in research and development in disease mechanisms and treatment. Therefore, recognition of gastric precancerous lesions and early neoplasia is crucial. Two subtypes of sporadic gastric cancer have been recognized: cardia subtype and non-cardia (distal) subtype, the latter being more frequent and largely associated with infection of Helicobacter pylori, a class I carcinogen. Helicobacter pylori initiates the widely accepted Correa cascade, describing a stepwise progression through precursor lesions from chronic inflammation to gastric atrophy, gastric intestinal metaplasia and neoplasia. Our knowledge on He-licobacter pylori is still limited, and multiple questions in the context of its contribution to the pathogenesis of gastric neoplasia are yet to be answered. Awareness and recognition of gastric atrophy and intestinal metaplasia on high-definition white-light endoscopy, image-enhanced endoscopy and magnification endoscopy, in combination with histology from the biopsies taken accurately according to the protocol, are crucial to guiding the management. Standard indications for endoscopic resections (endoscopic mucosal resection and endoscopic submucosal dissection) of gastric dysplasia and intestinal type of gastric carcinoma have been recommended by multiple societies. Endoscopic evaluation and surveillance should be offered to individuals with an inherited predisposition to gastric carcinoma.
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25
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Mohammadzadeh R, Soleimanpour S, Pishdadian A, Farsiani H. Designing and development of epitope-based vaccines against Helicobacter pylori. Crit Rev Microbiol 2021; 48:489-512. [PMID: 34559599 DOI: 10.1080/1040841x.2021.1979934] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Helicobacter pylori infection is the principal cause of serious diseases (e.g. gastric cancer and peptic ulcers). Antibiotic therapy is an inadequate strategy in H. pylori eradication because of which vaccination is an inevitable approach. Despite the presence of countless vaccine candidates, current vaccines in clinical trials have performed with poor efficacy which makes vaccination extremely challenging. Remarkable advancements in immunology and pathogenic biology have provided an appropriate opportunity to develop various epitope-based vaccines. The fusion of proper antigens involved in different aspects of H. pylori colonization and pathogenesis as well as peptide linkers and built-in adjuvants results in producing epitope-based vaccines with excellent therapeutic efficacy and negligible adverse effects. Difficulties of the in vitro culture of H. pylori, high genetic variation, and unfavourable immune responses against feeble epitopes in the complete antigen are major drawbacks of current vaccine strategies that epitope-based vaccines may overcome. Besides decreasing the biohazard risk, designing precise formulations, saving time and cost, and induction of maximum immunity with minimum adverse effects are the advantages of epitope-based vaccines. The present article is a comprehensive review of strategies for designing and developing epitope-based vaccines to provide insights into the innovative vaccination against H. pylori.
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Affiliation(s)
- Roghayeh Mohammadzadeh
- Antimicrobial Resistance Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Microbiology and Virology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Saman Soleimanpour
- Antimicrobial Resistance Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.,Reference Tuberculosis Laboratory, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Abbas Pishdadian
- Department of Immunology, School of Medicine, Zabol University of Medical Sciences, Zabol, Iran
| | - Hadi Farsiani
- Antimicrobial Resistance Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.,Department of Microbiology and Virology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
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26
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Ozeki K, Furuta T, Ojima T. Association Between Patients' Immunoglobulin E Levels and Difficulty Eradicating Helicobacter pylori. Clin Exp Gastroenterol 2021; 14:311-316. [PMID: 34345177 PMCID: PMC8325756 DOI: 10.2147/ceg.s322512] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 07/17/2021] [Indexed: 12/14/2022] Open
Abstract
Background Helicobacter pylori is a cause of gastric cancer, and thus the eradication of this bacterium is very important. The success rate of primary eradication has been dramatically increased by the introduction of potassium-competitive acid blockers. However, H. pylori cannot be eradicated in all patients, and the contributing factors need to be clarified. Aim Because allergy status may be a factor and considering research linking hay fever with eradication failure, the purpose of this study was to examine blood immunoglobulin E levels as a contributing factor in patients who were unable to eradicate H. pylori in a single eradication treatment and who underwent multiple eradication attempts. Methods Questionnaire data were collected from 250 patients who visited the Department of Gastroenterology, Hamamatsu University School of Medicine, for H. pylori eradication. In addition, non-specific IgE levels in the blood were measured and analyzed with one-way analysis of variance. Multinomial logistic regression analysis was performed to examine the association between the number of eradication attempts and the IgE level (< 500 vs ≥ 500 IU/mL). Results The mean IgE values were 188.4, 211.9, and 744.0 IU/mL in patients with one, two, and three or more eradication attempts, respectively (P < 0.05). The results of multinomial logistic regression analysis showed that attempting eradication three or more times was significantly associated with high levels of IgE, even after consideration of antibiotic sensitivity. Conclusion H. pylori eradication was less likely in patients with high IgE. It is thus necessary to study the appropriate regimen for patients with high IgE levels.
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Affiliation(s)
- Kayoko Ozeki
- Department of Community Health and Preventive Medicine, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan.,Department of Pharmaceutical Health Care and Science, Aichi Gakuin University, Nagoya, Aichi, Japan
| | - Takahisa Furuta
- Center for Clinical Research, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Toshiyuki Ojima
- Department of Community Health and Preventive Medicine, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
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27
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Abstract
Helicobacter pylori is present in approximately one-half of the world's population. There are significant differences in prevalence based on region, age, race/ethnicity, and socioeconomic status. H pylori is the most common cause of infection-related cancers. Studies have demonstrated the relationship between H pylori infection and gastric adenocarcinoma and mucosa-associated lymphoid tissue lymphoma. H pylori has features and enzymatic properties allowing it to survive in the acidic stomach environment, and has specific virulence factors that promote an increased risk of gastric pathology. Eradication of H pylori is first-line therapy for mucosa-associated lymphoid tissue lymphoma and decreases the risk of gastric adenocarcinoma.
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28
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Tata A, Chow RD, Tata PR. Epithelial cell plasticity: breaking boundaries and changing landscapes. EMBO Rep 2021; 22:e51921. [PMID: 34096150 DOI: 10.15252/embr.202051921] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 05/08/2021] [Accepted: 05/18/2021] [Indexed: 12/17/2022] Open
Abstract
Epithelial tissues respond to a wide variety of environmental and genotoxic stresses. As an adaptive mechanism, cells can deviate from their natural paths to acquire new identities, both within and across lineages. Under extreme conditions, epithelial tissues can utilize "shape-shifting" mechanisms whereby they alter their form and function at a tissue-wide scale. Mounting evidence suggests that in order to acquire these alternate tissue identities, cells follow a core set of "tissue logic" principles based on developmental paradigms. Here, we review the terminology and the concepts that have been put forward to describe cell plasticity. We also provide insights into various cell intrinsic and extrinsic factors, including genetic mutations, inflammation, microbiota, and therapeutic agents that contribute to cell plasticity. Additionally, we discuss recent studies that have sought to decode the "syntax" of plasticity-i.e., the cellular and molecular principles through which cells acquire new identities in both homeostatic and malignant epithelial tissues-and how these processes can be manipulated for developing novel cancer therapeutics.
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Affiliation(s)
- Aleksandra Tata
- Department of Cell Biology, Duke University School of Medicine, Durham, NC, USA
| | - Ryan D Chow
- Department of Genetics, Systems Biology Institute, Medical Scientist Training Program, Yale University School of Medicine, New Haven, CT, USA
| | - Purushothama Rao Tata
- Department of Cell Biology, Duke University School of Medicine, Durham, NC, USA.,Duke Cancer Institute, Duke University School of Medicine, Durham, NC, USA.,Regeneration Next, Duke University, Durham, NC, USA.,Center for Advanced Genomic Technologies, Duke University, Durham, NC, USA
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29
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Borchmann S. An atlas of the tissue and blood metagenome in cancer reveals novel links between bacteria, viruses and cancer. MICROBIOME 2021; 9:94. [PMID: 33888160 PMCID: PMC8063312 DOI: 10.1186/s40168-021-01039-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 02/18/2021] [Indexed: 05/02/2023]
Abstract
BACKGROUND Host tissue infections by bacteria and viruses can cause cancer. Known viral carcinogenic mechanisms are disruption of the host genome via genomic integration and expression of oncogenic viral proteins. An important bacterial carcinogenic mechanism is chronic inflammation. Massively parallel sequencing now routinely generates datasets large enough to contain detectable traces of bacterial and viral nucleic acids of taxa that colonize the examined tissue or are integrated into the host genome. However, this hidden resource has not been comprehensively studied in large patient cohorts. METHODS In the present study, 3025 whole genome sequencing datasets and, where available, corresponding RNA-seq datasets are leveraged to gain insight into novel links between viruses, bacteria, and cancer. Datasets were obtained from multiple International Cancer Genome Consortium studies, with additional controls added from the 1000 genome project. A customized pipeline based on KRAKEN was developed and validated to identify bacterial and viral sequences in the datasets. Raw results were stringently filtered to reduce false positives and remove likely contaminants. RESULTS The resulting map confirms known links and expands current knowledge by identifying novel associations. Moreover, the detection of certain bacteria or viruses is associated with profound differences in patient and tumor phenotypes, such as patient age, tumor stage, survival, and somatic mutations in cancer genes or gene expression profiles. CONCLUSIONS Overall, these results provide a detailed, unprecedented map of links between viruses, bacteria, and cancer that can serve as a reference for future studies and further experimental validation. Video Abstract.
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Affiliation(s)
- Sven Borchmann
- Department I of Internal Medicine, Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf, University of Cologne, Cologne, Germany.
- Cancer Center Cologne Essen - Partner Site Cologne, CIO Cologne, University of Cologne, Cologne, Germany.
- German Hodgkin Study Group, Cologne, Germany.
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30
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Suganuma M, Watanabe T, Sueoka E, Lim IK, Fujiki H. Role of TNF-α-Inducing Protein Secreted by Helicobacter pylori as a Tumor Promoter in Gastric Cancer and Emerging Preventive Strategies. Toxins (Basel) 2021; 13:181. [PMID: 33804551 PMCID: PMC7999756 DOI: 10.3390/toxins13030181] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 02/20/2021] [Accepted: 02/21/2021] [Indexed: 12/24/2022] Open
Abstract
The tumor necrosis factor-α (TNF-α)-inducing protein (tipα) gene family, comprising Helicobacter pylori membrane protein 1 (hp-mp1) and tipα, has been identified as a tumor promoter, contributing to H. pylori carcinogenicity. Tipα is a unique H. pylori protein with no similarity to other pathogenicity factors, CagA, VacA, and urease. American H. pylori strains cause human gastric cancer, whereas African strains cause gastritis. The presence of Tipα in American and Euro-Asian strains suggests its involvement in human gastric cancer development. Tipα secreted from H. pylori stimulates gastric cancer development by inducing TNF-α, an endogenous tumor promoter, through its interaction with nucleolin, a Tipα receptor. This review covers the following topics: tumor-promoting activity of the Tipα family members HP-MP1 and Tipα, the mechanism underlying this activity of Tipα via binding to the cell-surface receptor, nucleolin, the crystal structure of rdel-Tipα and N-terminal truncated rTipα, inhibition of Tipα-associated gastric carcinogenesis by tumor suppressor B-cell translocation gene 2 (BTG2/TIS21), and new strategies to prevent and treat gastric cancer. Thus, Tipα contributes to the carcinogenicity of H. pylori by a mechanism that differs from those of CagA and VacA.
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Affiliation(s)
- Masami Suganuma
- Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
| | - Tatsuro Watanabe
- Department of Drug Discovery and Biomedical Sciences, Faculty of Medicine, Saga University, Nabeshima, Saga 849-8501, Japan;
| | - Eisaburo Sueoka
- Department of Clinical Laboratory Medicine, Faculty of Medicine, Saga University, Nabeshima, Saga 849-8501, Japan; (E.S.); (H.F.)
| | - In Kyoung Lim
- Department of Biochemistry and Molecular Biology, Ajou University School of Medicine, Suwon 16499, Gyeonggi-do, Korea;
| | - Hirota Fujiki
- Department of Clinical Laboratory Medicine, Faculty of Medicine, Saga University, Nabeshima, Saga 849-8501, Japan; (E.S.); (H.F.)
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31
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Robinson K, Atherton JC. The Spectrum of Helicobacter-Mediated Diseases. ANNUAL REVIEW OF PATHOLOGY-MECHANISMS OF DISEASE 2020; 16:123-144. [PMID: 33197219 DOI: 10.1146/annurev-pathol-032520-024949] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Helicobacter pylori is the leading cause of peptic ulcer disease. The infection has been implicated in more than 75% of duodenal ulcer cases and 17% of gastric ulcer cases. H. pylori has been classified as a human carcinogen, since it is the main cause of distal gastric adenocarcinoma and B cell mucosa-associated lymphoid tissue lymphoma. Evidence also links H. pylori with extragastric conditions including iron deficiency anemia, idiopathic thrombocytopenic purpura, and vitamin B12 deficiency. Studies indicate that H. pylori may be protective against other conditions of the gastrointestinal tract (e.g., reflux esophagitis and related pathologies) and elsewhere in the body (e.g., asthma). The infection is asymptomatic in the vast majority of cases; more serious outcomes occur in only 10-15% of infected individuals. Despite extensive research over the past 3 decades, there is no effective vaccine, and the circumstances leading to disease development remain unclear. In addition, there is now a growing prevalence of antimicrobial resistance in H. pylori. This review discusses these important issues.
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Affiliation(s)
- Karen Robinson
- National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust, Nottingham NG7 2UH, United Kingdom.,Nottingham Digestive Diseases Centre, University of Nottingham, Nottingham NG7 2RD United Kingdom;
| | - John C Atherton
- National Institute for Health Research (NIHR) Nottingham Biomedical Research Centre, Nottingham University Hospitals NHS Trust, Nottingham NG7 2UH, United Kingdom.,Nottingham Digestive Diseases Centre, University of Nottingham, Nottingham NG7 2RD United Kingdom;
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32
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The ALPK1/TIFA/NF-κB axis links a bacterial carcinogen to R-loop-induced replication stress. Nat Commun 2020; 11:5117. [PMID: 33037203 PMCID: PMC7547021 DOI: 10.1038/s41467-020-18857-z] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 09/16/2020] [Indexed: 02/07/2023] Open
Abstract
Exposure of gastric epithelial cells to the bacterial carcinogen Helicobacter pylori causes DNA double strand breaks. Here, we show that H. pylori-induced DNA damage occurs co-transcriptionally in S-phase cells that activate NF-κB signaling upon innate immune recognition of the lipopolysaccharide biosynthetic intermediate β-ADP-heptose by the ALPK1/TIFA signaling pathway. DNA damage depends on the bi-functional RfaE enzyme and the Cag pathogenicity island of H. pylori, is accompanied by replication fork stalling and can be observed also in primary cells derived from gastric organoids. Importantly, H. pylori-induced replication stress and DNA damage depend on the presence of co-transcriptional RNA/DNA hybrids (R-loops) that form in infected cells during S-phase as a consequence of β-ADP-heptose/ ALPK1/TIFA/NF-κB signaling. H. pylori resides in close proximity to S-phase cells in the gastric mucosa of gastritis patients. Taken together, our results link bacterial infection and NF-κB-driven innate immune responses to R-loop-dependent replication stress and DNA damage. The bacterial pathogen Helicobacter pylori is known for its ability to induce DNA double-strand breaks in the genome of its target cells. Here, we show that H. pylori-induced DNA damage and replication stress occurs in S-phase cells as a result of R-loop-mediated transcription/replication conflicts that are triggered by activation of the ALPK1/TIFA/NF-κB signaling axis.
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33
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Boot A, Ng AWT, Chong FT, Ho SC, Yu W, Tan DSW, Iyer NG, Rozen SG. Characterization of colibactin-associated mutational signature in an Asian oral squamous cell carcinoma and in other mucosal tumor types. Genome Res 2020; 30:803-813. [PMID: 32661091 PMCID: PMC7370881 DOI: 10.1101/gr.255620.119] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 06/04/2020] [Indexed: 12/24/2022]
Abstract
Mutational signatures can reveal the history of mutagenic processes that cells were exposed to before and during tumorigenesis. We expect that as-yet-undiscovered mutational processes will shed further light on mutagenesis leading to carcinogenesis. With this in mind, we analyzed the mutational spectra of 36 Asian oral squamous cell carcinomas. The mutational spectra of two samples from patients who presented with oral bacterial infections showed novel mutational signatures. One of these novel signatures, SBS_AnT, is characterized by a preponderance of thymine mutations, strong transcriptional strand bias, and enrichment for adenines in the 4 bp 5′ of mutation sites. The mutational signature described in this manuscript was shown to be caused by colibactin, a bacterial mutagen produced by E. coli carrying the pks-island. Examination of publicly available sequencing data revealed SBS_AnT in 25 tumors from several mucosal tissue types, expanding the list of tissues in which this mutational signature is observed.
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Affiliation(s)
- Arnoud Boot
- Cancer and Stem Cell Biology, Duke-NUS Medical School, 169857, Singapore.,Center for Computational Biology, Duke-NUS Medical School, 169857, Singapore
| | - Alvin W T Ng
- Center for Computational Biology, Duke-NUS Medical School, 169857, Singapore.,NUS Graduate School for Integrative Sciences and Engineering, 117456, Singapore
| | - Fui Teen Chong
- Cancer Therapeutics Research Laboratory, Division of Medical Science, National Cancer Centre Singapore, 169610, Singapore
| | - Szu-Chi Ho
- Cancer and Stem Cell Biology, Duke-NUS Medical School, 169857, Singapore
| | - Willie Yu
- Cancer and Stem Cell Biology, Duke-NUS Medical School, 169857, Singapore.,Center for Computational Biology, Duke-NUS Medical School, 169857, Singapore
| | - Daniel S W Tan
- Cancer Therapeutics Research Laboratory, Division of Medical Science, National Cancer Centre Singapore, 169610, Singapore
| | - N Gopalakrishna Iyer
- Cancer and Stem Cell Biology, Duke-NUS Medical School, 169857, Singapore.,Cancer Therapeutics Research Laboratory, Division of Medical Science, National Cancer Centre Singapore, 169610, Singapore
| | - Steven G Rozen
- Cancer and Stem Cell Biology, Duke-NUS Medical School, 169857, Singapore.,Center for Computational Biology, Duke-NUS Medical School, 169857, Singapore.,NUS Graduate School for Integrative Sciences and Engineering, 117456, Singapore
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Emerging role of microbiota in immunomodulation and cancer immunotherapy. Semin Cancer Biol 2020; 70:37-52. [PMID: 32580024 DOI: 10.1016/j.semcancer.2020.06.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 06/11/2020] [Accepted: 06/11/2020] [Indexed: 02/08/2023]
Abstract
Gut microbiota is emerging as a key modulator of the immune system. Alteration of gut microbiota impacts functioning of the immune system and pathophysiology of several diseases, including cancer. Growing evidence indicates that gut microbiota is not only involved in carcinogenesis but also has an impact on the efficacy and toxicity of cancer therapy. Recently, several pre-clinical and clinical studies across diverse cancer types reported the influence of gut microbiota on the host immune response to immunotherapy. Advancement in our understanding of the mechanism behind microbiota-mediated modulation of immune response is paramount for their utilization as cancer therapeutics. These microbial therapies in combination with conventional immunotherapeutic methods have the potential to transform the pre-existing treatment strategies to personalized cancer therapy. In this review, we have summarized the current status of research in the field and discussed the role of microbiota as an immune system modulator in context of cancer and their impact on immunotherapy.
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Colibactin DNA-damage signature indicates mutational impact in colorectal cancer. Nat Med 2020; 26:1063-1069. [PMID: 32483361 DOI: 10.1038/s41591-020-0908-2] [Citation(s) in RCA: 140] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 04/23/2020] [Indexed: 02/06/2023]
Abstract
The mucosal epithelium is a common target of damage by chronic bacterial infections and the accompanying toxins, and most cancers originate from this tissue. We investigated whether colibactin, a potent genotoxin1 associated with certain strains of Escherichia coli2, creates a specific DNA-damage signature in infected human colorectal cells. Notably, the genomic contexts of colibactin-induced DNA double-strand breaks were enriched for an AT-rich hexameric sequence motif, associated with distinct DNA-shape characteristics. A survey of somatic mutations at colibactin target sites of several thousand cancer genomes revealed notable enrichment of this motif in colorectal cancers. Moreover, the exact double-strand-break loci corresponded with mutational hot spots in cancer genomes, reminiscent of a trinucleotide signature previously identified in healthy colorectal epithelial cells3. The present study provides evidence for the etiological role of colibactin in human cancer.
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Satoh-Takayama N, Kato T, Motomura Y, Kageyama T, Taguchi-Atarashi N, Kinoshita-Daitoku R, Kuroda E, Di Santo JP, Mimuro H, Moro K, Ohno H. Bacteria-Induced Group 2 Innate Lymphoid Cells in the Stomach Provide Immune Protection through Induction of IgA. Immunity 2020; 52:635-649.e4. [PMID: 32240600 DOI: 10.1016/j.immuni.2020.03.002] [Citation(s) in RCA: 94] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 01/15/2020] [Accepted: 03/06/2020] [Indexed: 12/21/2022]
Abstract
The intestinal microbiota shapes and directs immune development locally and systemically, but little is known about whether commensal microbes in the stomach can impact their immunological microenvironment. Here, we report that group 2 innate lymphoid cells (ILC2s) were the predominant ILC subset in the stomach and show that their homeostasis and effector functions were regulated by local commensal communities. Microbes elicited interleukin-7 (IL-7) and IL-33 production in the stomach, which in turn triggered the propagation and activation of ILC2. Stomach ILC2s were also rapidly induced following infection with Helicobacter pylori. ILC2-derived IL-5 resulted in the production of IgA, which coated stomach bacteria in both specific pathogen-free (SPF) and H. pylori-infected mice. Our study thus identifies ILC2-dependent IgA response that is regulated by the commensal microbiota, which is implicated in stomach protection by eliminating IgA-coated bacteria including pathogenic H. pylori.
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Affiliation(s)
- Naoko Satoh-Takayama
- Laboratory for Intestinal Ecosystem, Center for Integrative Medical Sciences, RIKEN Yokohama, Kanagawa 230-0045, Japan; Immunobiology Laboratory, Graduate School of Medical Life Science, Yokohama City University Yokohama, Kanagawa 230-0045, Japan.
| | - Tamotsu Kato
- Laboratory for Intestinal Ecosystem, Center for Integrative Medical Sciences, RIKEN Yokohama, Kanagawa 230-0045, Japan; Immunobiology Laboratory, Graduate School of Medical Life Science, Yokohama City University Yokohama, Kanagawa 230-0045, Japan
| | - Yasutaka Motomura
- Laboratory for Innate Immune Systems, Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University Suita, Osaka 565-0871, Japan; Laboratory for Innate Immune Systems, Center for Integrative Medical Sciences, RIKEN Yokohama, Kanagawa 230-0045, Japan
| | - Tomoko Kageyama
- Laboratory for Intestinal Ecosystem, Center for Integrative Medical Sciences, RIKEN Yokohama, Kanagawa 230-0045, Japan
| | - Naoko Taguchi-Atarashi
- Laboratory for Intestinal Ecosystem, Center for Integrative Medical Sciences, RIKEN Yokohama, Kanagawa 230-0045, Japan; Immunobiology Laboratory, Graduate School of Medical Life Science, Yokohama City University Yokohama, Kanagawa 230-0045, Japan
| | - Ryo Kinoshita-Daitoku
- Department of Infection Microbiology, Research Institute for Microbial Diseases, Osaka University Suita, Osaka 565-0871, Japan
| | - Eisuke Kuroda
- Department of Infection Microbiology, Research Institute for Microbial Diseases, Osaka University Suita, Osaka 565-0871, Japan
| | - James P Di Santo
- Innate Immunity Unit, Institut Pasteur, Paris 75015, France; Institut National de la Santé et de la Recherche Médicale (INSERM), U1223 Paris 75013, France
| | - Hitomi Mimuro
- Department of Infection Microbiology, Research Institute for Microbial Diseases, Osaka University Suita, Osaka 565-0871, Japan
| | - Kazuyo Moro
- Laboratory for Innate Immune Systems, Department of Microbiology and Immunology, Graduate School of Medicine, Osaka University Suita, Osaka 565-0871, Japan; Laboratory for Innate Immune Systems, Center for Integrative Medical Sciences, RIKEN Yokohama, Kanagawa 230-0045, Japan
| | - Hiroshi Ohno
- Laboratory for Intestinal Ecosystem, Center for Integrative Medical Sciences, RIKEN Yokohama, Kanagawa 230-0045, Japan; Immunobiology Laboratory, Graduate School of Medical Life Science, Yokohama City University Yokohama, Kanagawa 230-0045, Japan; Intestinal Microbiota Project, Kanagawa Institute of Industrial Science and Technology Ebina, Kanagawa 243-0435, Japan.
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Tracking the Virulent Helicobacter pylori Strains Instead of Its Pan-Screening to Prevent Gastric Cancer. BIONANOSCIENCE 2020. [DOI: 10.1007/s12668-019-00678-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Lima SR, Barbosa JMDS, Saracchini PGV, Padilha FGF, Leite JDS, Ferreira AMR. Gastric lesions in free-living sea turtles: An underestimated disease that reflects the health of the ecosystem. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 697:133970. [PMID: 31476501 DOI: 10.1016/j.scitotenv.2019.133970] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 07/25/2019] [Accepted: 08/17/2019] [Indexed: 06/10/2023]
Abstract
Free-living marine turtles are constantly exposed to aggression factors and the gastrointestinal tract is one of the main gateways of entry. The objective of this study was to identify, and describe the anatomopathological alterations in the stomach of free-living marine turtles found dead on the beaches of the Microrregião dos Lagos, Rio de Janeiro, Brazil. Twenty-two sea turtles were necropsied, and stomach fragments were collected, fixed, and processed routinely. The presence of gastritis, parasitism, and adaptative morphological alteration of the cells were evaluated in a microscopic analysis. Descriptive statistics and Fisher's exact test were performed. Of the samples, 59.1% had stomach hyperemia. Microscopically, gastritis was found in 86.4% of cases, parasitism in 72.7%, and adaptive morphological alteration in 59.1%. There was an association between the presence of cellular adaptive morphological alteration and chronic inflammation. This the first report to describe the adaptive morphological changes observed in the stomach cells. The chronicity of the lesions was due to continuous aggressions to the tissue, with parasitism, garbage ingestion, and environmental pollutants as possible causes. The results obtained in this study demonstrate that the chronicity of the stomach lesions is due to continuous aggressions to this tissue, and the irritating factors have environmental origin, such as parasites, garbage, and toxic pollutants, including heavy metals, which are ingested by free-living sea turtles. This article demonstrates that stomach injuries in free-living marine turtles are frequent, severe, and possibly underdiagnosed; these lesions reflect the diseased ecosystem in which those animals live.
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Affiliation(s)
- Samara Rosolem Lima
- Programa de Pós graduação em Medicina Veterinária (área de Clínica e Reprodução Animal), Faculdade de Medicina Veterinária, Universidade Federal Fluminense, Niterói, RJ 24230-340, Brazil.
| | - João Marcos da Silva Barbosa
- Programa de Pós graduação em Medicina Veterinária (área de Clínica e Reprodução Animal), Faculdade de Medicina Veterinária, Universidade Federal Fluminense, Niterói, RJ 24230-340, Brazil
| | - Paula Gabrielle Veiga Saracchini
- Programa de Pós graduação em Medicina Veterinária (área de Clínica e Reprodução Animal), Faculdade de Medicina Veterinária, Universidade Federal Fluminense, Niterói, RJ 24230-340, Brazil
| | - Felipe Gomes Ferreira Padilha
- Programa de Pós graduação em Medicina Veterinária (área de Clínica e Reprodução Animal), Faculdade de Medicina Veterinária, Universidade Federal Fluminense, Niterói, RJ 24230-340, Brazil
| | - Juliana da Silva Leite
- Programa de Pós graduação em Medicina Veterinária (área de Clínica e Reprodução Animal), Faculdade de Medicina Veterinária, Universidade Federal Fluminense, Niterói, RJ 24230-340, Brazil; Departamento de Patologia e Clínica Veterinária, Faculdade de Medicina Veterinária, Universidade Federal Fluminense, Niterói, RJ 24230-340, Brazil
| | - Ana Maria Reis Ferreira
- Programa de Pós graduação em Medicina Veterinária (área de Clínica e Reprodução Animal), Faculdade de Medicina Veterinária, Universidade Federal Fluminense, Niterói, RJ 24230-340, Brazil; Departamento de Patologia e Clínica Veterinária, Faculdade de Medicina Veterinária, Universidade Federal Fluminense, Niterói, RJ 24230-340, Brazil.
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Schulz C, Schütte K, Mayerle J, Malfertheiner P. The role of the gastric bacterial microbiome in gastric cancer: Helicobacter pylori and beyond. Therap Adv Gastroenterol 2019; 12:1756284819894062. [PMID: 31897087 PMCID: PMC6920592 DOI: 10.1177/1756284819894062] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 11/11/2019] [Indexed: 02/04/2023] Open
Abstract
A link between chronic inflammation and carcinogenesis has been depicted in many organ systems. Helicobacter pylori is the most prevalent bacterial pathogen, induces chronic gastritis and is associated with more than 90% of cases of gastric cancer (GC). However, the introduction of nucleotide sequencing techniques and the development of biocomputional tools have surpassed traditional culturing techniques and opened a wide field for studying the mucosal and luminal composition of the bacterial gastric microbiota beyond H. pylori. In studies applying animal models, a potential role in gastric carcinogenesis for additional bacteria besides H. pylori has been demonstrated. At different steps of gastric carcinogenesis, changes in bacterial communities occur. Whether these microbial changes are a driver of malignant disease or a consequence of the histologic progression along the precancerous cascade, is not clear at present. It is hypothesized that atrophy, as a consequence of chronic gastric inflammation, alters the gastric niche for commensals that might further urge the development of H. pylori-induced GC. Here, we review the current state of knowledge on gastric bacteria other than H. pylori and on their synergism with H. pylori in gastric carcinogenesis.
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Affiliation(s)
| | - Kerstin Schütte
- Department of Internal Medicine and
Gastroenterology, Niels-Stensen-Kliniken, Marienhospital Osnabrück,
Osnabrück, Germany,Department of Gastroenterology, Hepatology and
Infectious Diseases, Otto-von-Guericke University, Magdeburg, Germany
| | - Julia Mayerle
- Department of Medicine II, University Hospital,
LMU Munich, Germany
| | - Peter Malfertheiner
- Department of Medicine II, University Hospital,
LMU Munich, Germany,Department of Gastroenterology, Hepatology and
Infectious Diseases, Otto-von-Guericke University, Magdeburg, Germany
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Molecular anatomy and pathogenic actions of Helicobacter pylori CagA that underpin gastric carcinogenesis. Cell Mol Immunol 2019; 17:50-63. [PMID: 31804619 PMCID: PMC6952403 DOI: 10.1038/s41423-019-0339-5] [Citation(s) in RCA: 132] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 11/13/2019] [Accepted: 11/13/2019] [Indexed: 12/15/2022] Open
Abstract
Chronic infection with Helicobacter pylori cagA-positive strains is the strongest risk factor for gastric cancer. The cagA gene product, CagA, is delivered into gastric epithelial cells via the bacterial type IV secretion system. Delivered CagA then undergoes tyrosine phosphorylation at the Glu-Pro-Ile-Tyr-Ala (EPIYA) motifs in its C-terminal region and acts as an oncogenic scaffold protein that physically interacts with multiple host signaling proteins in both tyrosine phosphorylation-dependent and -independent manners. Analysis of CagA using in vitro cultured gastric epithelial cells has indicated that the nonphysiological scaffolding actions of CagA cell-autonomously promote the malignant transformation of the cells by endowing the cells with multiple phenotypic cancer hallmarks: sustained proliferation, evasion of growth suppressors, invasiveness, resistance to cell death, and genomic instability. Transgenic expression of CagA in mice leads to in vivo oncogenic action of CagA without any overt inflammation. The in vivo oncogenic activity of CagA is further potentiated in the presence of chronic inflammation. Since Helicobacter pylori infection triggers a proinflammatory response in host cells, a feedforward stimulation loop that augments the oncogenic actions of CagA and inflammation is created in CagA-injected gastric mucosa. Given that Helicobacter pylori is no longer colonized in established gastric cancer lesions, the multistep nature of gastric cancer development should include a “hit-and-run” process of CagA action. Thus, acquisition of genetic and epigenetic alterations that compensate for CagA-directed cancer hallmarks may be required for completion of the “hit-and-run” process of gastric carcinogenesis.
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Abstract
PURPOSE The role of Helicobacter pylori as key factor in gastric inflammation and the development of (pre-)cancerous lesions is undisputable. As an open system, the human upper gastrointestinal tract harbors a complex bacterial community which is highly impacted by the absence or presence of H. pylori. The interaction between other bacteria and H. pylori might impact on gastric carcinogenesis. RECENT FINDINGS Several studies demonstrated differences in the composition of the gastric bacterial community in different stages of gastritis and between samples from tumor and adjacent tissue. In addition, animal studies demonstrated an increased and accelerated development of precancerous lesions in mice colonized with intestinal flora and H. pylori compared with mice mono-infected with H. pylori. CONCLUSION Other bacteria beyond H. pylori enter the focus in research on gastric carcinogenesis. However, we are still far from a thorough understanding of the pathophysiology of host-microbiota interaction and its impact on the development of malignant and precancerous changes.
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Relationship between primary eradication of Helicobacter pylori and drinking habits in women: collaborative research between a pharmacy and a clinic. Epidemiol Infect 2019; 147:e292. [PMID: 31637982 PMCID: PMC6813646 DOI: 10.1017/s0950268819001730] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Helicobacter pylori is a cause of stomach cancer and peptic ulcer. For prevention, improving the eradication rate of H. pylori is crucial. However, the association between eradication and lifestyle of infected patients, including alcohol consumption, remains unclear. We explored associations between failed primary eradication therapy and drinking status by sex. This study involved 356 patients who visited a pharmacy with prescriptions for primary H. pylori eradication therapy. We assessed drinking habits using a questionnaire. Data on patients with failed primary eradication were provided by the nearby local clinic. We performed logistic regression analysis to examine the effect of drinking habit and frequency of drinking on failed primary eradication by sex. The odds ratio of primary eradication failure in female patients with a drinking habit was 3.75 (P = 0.001), but that in male patients was not significant. The odds ratio tended to increase in relation to drinking frequency in women. Frequent consumption of alcohol is not only likely to affect eradication, but also has a large impact on the bodies of women, who are more susceptible than men to the effects of alcohol. Thus, women should take greater care in alcohol consumption.
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Suzuki R, Satou K, Shiroma A, Shimoji M, Teruya K, Matsumoto T, Akada J, Hirano T, Yamaoka Y. Genome-wide mutation analysis of Helicobacter pylori after inoculation to Mongolian gerbils. Gut Pathog 2019; 11:45. [PMID: 31558915 PMCID: PMC6754630 DOI: 10.1186/s13099-019-0326-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 09/12/2019] [Indexed: 12/23/2022] Open
Abstract
Background Helicobacter pylori is a pathogenic bacterium that causes various gastrointestinal diseases in the human stomach. H. pylori is well adapted to the human stomach but does not easily infect other animals. As a model animal, Mongolian gerbils are often used, however, the genome of the inoculated H. pylori may accumulate mutations to adapt to the new host. To investigate mutations occurring in H. pylori after infection in Mongolian gerbils, we compared the whole genome sequence of TN2 wild type strain (TN2wt) and next generation sequencing data of retrieved strains from the animals after different lengths of infection. Results We identified mutations in 21 loci of 17 genes of the post-inoculation strains. Of the 17 genes, five were outer membrane proteins that potentially influence on the colonization and inflammation. Missense and nonsense mutations were observed in 15 and 6 loci, respectively. Multiple mutations were observed in three genes. Mutated genes included babA, tlpB, and gltS, which are known to be associated with adaptation to murine. Other mutations were involved with chemoreceptor, pH regulator, and outer membrane proteins, which also have potential to influence on the adaptation to the new host. Conclusions We confirmed mutations in genes previously reported to be associated with adaptation to Mongolian gerbils. We also listed up genes that mutated during the infection to the gerbils, though it needs experiments to prove the influence on adaptation.
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Affiliation(s)
- Rumiko Suzuki
- 1Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama-machi, Yufu, Oita 879-5593 Japan
| | - Kazuhito Satou
- Okinawa Institute of Advanced Sciences, 5-1 Suzaki, Uruma, Okinawa 904-2234 Japan
| | - Akino Shiroma
- Okinawa Institute of Advanced Sciences, 5-1 Suzaki, Uruma, Okinawa 904-2234 Japan
| | - Makiko Shimoji
- Okinawa Institute of Advanced Sciences, 5-1 Suzaki, Uruma, Okinawa 904-2234 Japan
| | - Kuniko Teruya
- Okinawa Institute of Advanced Sciences, 5-1 Suzaki, Uruma, Okinawa 904-2234 Japan
| | - Takashi Matsumoto
- 1Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama-machi, Yufu, Oita 879-5593 Japan
| | - Junko Akada
- 1Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama-machi, Yufu, Oita 879-5593 Japan
| | - Takashi Hirano
- Okinawa Institute of Advanced Sciences, 5-1 Suzaki, Uruma, Okinawa 904-2234 Japan
| | - Yoshio Yamaoka
- 1Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, 1-1 Idaigaoka, Hasama-machi, Yufu, Oita 879-5593 Japan.,3Department of Medicine-Gastroenterology, Baylor College of Medicine, 2002 Holcombe Blvd., Houston, TX 77030 USA.,Global Oita Medical Advanced Research Center for Health, 1-1 Idaigaoka, Hasama-machi, Yufu, Oita 879-5593 Japan
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Tahara T, Tahara S, Horiguchi N, Kawamura T, Okubo M, Nagasaka M, Nakagawa Y, Shibata T, Urano M, Tsukamoto T, Kuroda M, Ohmiya N. Gastric Mucosal Microarchitectures Associated with Irreversibility with Helicobacter pylori Eradication and Downregulation of Micro RNA (miR)-124a. Cancer Invest 2019; 37:417-426. [PMID: 31483161 DOI: 10.1080/07357907.2019.1663207] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
To investigate the molecular mechanisms of gastric carcinogenesis after Helicobacter pylori (H. pylori) eradication, expression of miR-124a, miR-34b, and miR-34c was examined in nonneoplastic gastric specimens after successful H. pylori eradication. The magnifying narrow-band imaging (NBI) endoscopic features of gastric mucosa were also examined. The atrophic type, an informative endoscopic feature for histological intestinal metaplasia, showed lower expression of miR-124a. Lower expression of miR-124a correlated with hypermethylation of the miR-124a3 locus. The atrophic type represents gastric microarchitectures associated with irreversibility with H. pylori eradication and downregulation of miR-124a.
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Affiliation(s)
- Tomomitsu Tahara
- Department of Gastroenterology, Fujita Health University School of Medicine , Toyoake , Japan
| | - Sayumi Tahara
- Department of Diagnostic Pathology I, School of Medicine, Fujita Health University , Toyoake , Japan
| | - Noriyuki Horiguchi
- Department of Gastroenterology, Fujita Health University School of Medicine , Toyoake , Japan
| | - Tomohiko Kawamura
- Department of Gastroenterology, Fujita Health University School of Medicine , Toyoake , Japan
| | - Masaaki Okubo
- Department of Gastroenterology, Fujita Health University School of Medicine , Toyoake , Japan
| | - Mitsuo Nagasaka
- Department of Gastroenterology, Fujita Health University School of Medicine , Toyoake , Japan
| | - Yoshihito Nakagawa
- Department of Gastroenterology, Fujita Health University School of Medicine , Toyoake , Japan
| | - Tomoyuki Shibata
- Department of Gastroenterology, Fujita Health University School of Medicine , Toyoake , Japan
| | - Makoto Urano
- Department of Diagnostic Pathology I, School of Medicine, Fujita Health University , Toyoake , Japan
| | - Tetsuya Tsukamoto
- Department of Diagnostic Pathology I, School of Medicine, Fujita Health University , Toyoake , Japan
| | - Makoto Kuroda
- Department of Diagnostic Pathology I, School of Medicine, Fujita Health University , Toyoake , Japan
| | - Naoki Ohmiya
- Department of Gastroenterology, Fujita Health University School of Medicine , Toyoake , Japan
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Eslami M, Yousefi B, Kokhaei P, Arabkari V, Ghasemian A. Current information on the association of Helicobacter pylori with autophagy and gastric cancer. J Cell Physiol 2019; 234:14800-14811. [PMID: 30784066 DOI: 10.1002/jcp.28279] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 11/23/2018] [Accepted: 11/30/2018] [Indexed: 01/24/2023]
Abstract
Helicobacter pylori (H. pylori) is a Gram-negative bacterium and causative agent of gastric cancer. H. pylori induce defective autophagy or inhibit it by means of CagA and vacuolating cytotoxin A (VacA) toxins leading to the gastric cancer induction. Impaired or defective autophagy leads to the accumulation of cytotoxic materials, such as ROS and P62 that lead to increased mutations in the DNA, genome instability, and risk of cancer formation. H. pylori CagA may inhibit autophagy through the c-Met-PI3k/Akt-mTOR signaling pathway. However, VacA induces autophagy by some signaling pathways. In the gastric epithelial cells, VacA is a necessary and sufficient factor for the creation of autophagy. While CagA is a negative regulator of this phenomenon, the elimination of this gene from H. pylori has increased autophagy and the production of inflammatory cytokines is reduced. In gastrointestinal cancers, some of the microRNAs (miRNAs) act as tumor suppressors and some other are oncogenes by regulating various genes expression. H. pylori can also modify autophagy through a mechanism that includes the function of miRNAs. In autophagy, oncogenic miRNAs inhibit activation of some tumor suppressor signaling pathways (e.g., ULK1 complex, Beclin-1 function, and Atg4 messaging), whereas tumor suppressor miRNAs can block the activation of oncogenic signaling pathways. For instance, Beclin-1 is negatively regulated by miRNA-376b (oncogenic miRNA) and miRNA-30a (tumor suppressor miRNA). Similarly, Atg4 by miRNA-376b (oncogenic miRNA) and miRNA-101 (tumor suppressor miRNA). So, this apparent paradox can be explained as that both Beclin-1 and Atg4 play different roles in a particular cell or tissue.
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Affiliation(s)
- Majid Eslami
- Department of Bacteriology and Virology, Semnan University of Medical Sciences, Semnan, Iran
| | - Bahman Yousefi
- Department of Immunology, Semnan University of Medical Sciences, Semnan, Iran
| | - Parviz Kokhaei
- Cancer Research Center, Semnan University of Medical Sciences, Semnan, Iran
- Immune and Gene Therapy Lab, Cancer Centre Karolinska, Karolinska University Hospital, Stockholm, Sweden
| | - Vahid Arabkari
- Discipline of Pathology, Lambe Institute for Translational Research, Clinical Science Institute, School of Medicine, National University of Ireland, Galway, Ireland
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46
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Peng C, Li NS, Hu Y, Lu NH. Impact factors that modulate gastric cancer risk in Helicobacter pylori-infected rodent models. Helicobacter 2019; 24:e12580. [PMID: 30950162 DOI: 10.1111/hel.12580] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 02/08/2019] [Accepted: 02/26/2019] [Indexed: 12/24/2022]
Abstract
Gastric cancer causes a large social and economic burden to humans. Helicobacter pylori (H pylori) infection is a major risk factor for distal gastric cancer. Detailed elucidation of H pylori pathogenesis is significant for the prevention and treatment of gastric cancer. Animal models of H pylori-induced gastric cancer have provided an invaluable resource to help elucidate the mechanisms of H pylori-induced carcinogenesis as well as the interaction between host and the bacterium. Rodent models are commonly used to study H pylori infection because H pylori-induced pathological processes in the stomachs of rodents are similar to those in the stomachs of humans. The risk of gastric cancer in H pylori-infected animal models is greatly dependent on host factors, bacterial determinants, environmental factors, and microbiota. However, the related mechanisms and the effects of the interactions among these impact factors on gastric carcinogenesis remain unclear. In this review, we summarize the impact factors mediating gastric cancer risk when establishing H pylori-infected animal models. Clarifying these factors and their potential interactions will provide insights to construct animal models of gastric cancer and investigate the in-depth mechanisms of H pylori pathogenesis, which might contribute to the management of H pylori-associated gastric diseases.
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Affiliation(s)
- Chao Peng
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Nian-Shuang Li
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yi Hu
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Nong-Hua Lu
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, China
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Suk FM, Wang MH, Ho YS. A historical review of classic Helicobacter pylori publications in science citation index expanded. COLLNET JOURNAL OF SCIENTOMETRICS AND INFORMATION MANAGEMENT 2019. [DOI: 10.1080/09737766.2020.1716645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Fat-Moon Suk
- Division of Gastroenterology, Department of Internal Medicine, Taipei Municipal Wan Fang Hospital, Taipei Medical University, Taipei City 110, Taiwan, R.O.C
- Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei City 110, Taiwan, R.O.C
| | - Ming-Huang Wang
- Trend Research Centre, Asia University, No. 500, Lioufeng Road, Wufeng, Taichung County 41354, Taiwan, R.O.C
| | - Yuh-Shan Ho
- Trend Research Centre, Asia University, No. 500, Lioufeng Road, Wufeng, Taichung County 41354, Taiwan, R.O.C
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48
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Sethi V, Vitiello GA, Saxena D, Miller G, Dudeja V. The Role of the Microbiome in Immunologic Development and its Implication For Pancreatic Cancer Immunotherapy. Gastroenterology 2019; 156:2097-2115.e2. [PMID: 30768986 DOI: 10.1053/j.gastro.2018.12.045] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 12/09/2018] [Accepted: 12/17/2018] [Indexed: 12/20/2022]
Abstract
Our understanding of the microbiome and its role in immunity, cancer initiation, and cancer progression has evolved significantly over the past century. The "germ theory of cancer" was first proposed in the early 20th century, and shortly thereafter the bacterium Helicobacter pylori, and later Fusobacterium nucleatum, were implicated in the development of gastric and colorectal cancers, respectively. However, with the development of reliable mouse models and affordable sequencing technologies, the most fascinating aspect of the microbiome-cancer relationship, where microbes undermine cancer immune surveillance and indirectly promote oncogenesis, has only recently been described. In this review, we highlight the essential role of the microbiome in immune system development and maturation. We review how microbe-induced immune activation promotes oncogenesis, focusing particularly on pancreatic carcinogenesis, and show that modulation of the microbiome augments the anti-cancer immune response and enables successful immunotherapy against pancreatic cancer.
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Affiliation(s)
- Vrishketan Sethi
- Department of Surgery, Sylvester Comprehensive Cancer Center, University of Miami, Miami, Florida
| | - Gerardo A Vitiello
- S. Arthur Localio Laboratory, Department of Surgery, New York University School of Medicine, New York, New York
| | - Deepak Saxena
- S. Arthur Localio Laboratory, Department of Surgery, New York University School of Medicine, New York, New York; Department of Basic Science and Craniofacial Biology, New York University College of Dentistry, New York, New York
| | - George Miller
- S. Arthur Localio Laboratory, Department of Surgery, New York University School of Medicine, New York, New York
| | - Vikas Dudeja
- Department of Surgery, Sylvester Comprehensive Cancer Center, University of Miami, Miami, Florida.
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49
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Efficacy and Long-Term Safety of H. pylori Eradication for Gastric Cancer Prevention. Cancers (Basel) 2019; 11:cancers11050593. [PMID: 31035365 PMCID: PMC6562927 DOI: 10.3390/cancers11050593] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 04/12/2019] [Accepted: 04/25/2019] [Indexed: 02/07/2023] Open
Abstract
Helicobacter pylori (H. pylori) has been shown to be a causal factor of gastric cancer in cohort studies and animal models. Meta-analysis of case-control studies nested within prospective cohorts showed that H. pylori infection was associated with a 5.9-fold increased risk of non-cardia gastric cancer. Prospective cohort studies showed that gastric cancer developed in 1–4% of H. pylori-infected subjects. Gastric cancer was successfully induced in Mongolian gerbils and insulin-gastrin (INS-GAS) transgenic mice after inoculation of H. pylori. Meta-analysis of randomized control trials also showed that eradication of H. pylori may reduce the risk of gastric cancer. However, there are several concerns regarding the widespread use of antibiotics to prevent gastric cancer, including the emergence of antibiotic resistance and the perturbation of gut microbiota after H. pylori eradication. Recent studies showed that eradication of H. pylori resulted in an increase in the bacterial diversity and restoration of the relative abundance of other bacteria to levels similar to H. pylori non-infected subjects in the gastric microbiota. The administration of antibiotics may also alter the composition of intestinal microbiota. The α-diversity and β-diversity of fecal microbiota are significantly altered immediately after H. pylori eradication but are gradually restored to levels similar to those before therapy. Yet, the rate of recovery varies with regimens. The diversity was restored at week 8 after triple therapy but was not yet fully recovered at 1 year after concomitant and quadruple therapies. Some studies showed that supplementation of probiotics may reduce the dysbiosis during H. pylori eradication therapy. Although some earlier studies showed high levels of macrolide resistance after triple therapy, recent studies showed that the increased antibiotic resistance rate may be restored 2–12 months after eradication therapy. These results collectively provide evidence of the long-term safety of H. pylori eradication. Yet, more prospective cohort studies and randomized trials are warranted to assess the efficacy and long-term safety of H. pylori eradication for gastric cancer prevention.
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50
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Wang J, Yao Y, Zhang Q, Li S, Tang L. Inflammatory responses induced by Helicobacter pylori on the carcinogenesis of gastric epithelial GES‑1 cells. Int J Oncol 2019; 54:2200-2210. [PMID: 31081048 DOI: 10.3892/ijo.2019.4775] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 01/01/2019] [Indexed: 11/06/2022] Open
Abstract
Helicobacter pylori (HP) is a pathogenic bacterium associated with chronic gastritis, gastric ulcer and gastric cancer. In the present study, the primary carcinogenesis process of normal gastric epithelial cells (GES‑1) infected with HP was investigated. It was determined that infected gastric mucosal epithelial GES‑1 cells secreted increased interleukin‑8 (IL‑8) and IL‑23, and exhibited enhanced expression of inducible nitric oxide synthase and cyclooxygenase‑2, inducing inflammatory reactions and resulting in apoptosis. The bacterial infection significantly increased the expression of carcinogenesis‑associated genes, including p16, c‑Myc, p53 and p21, as well as the expression of cell surface signaling molecules cluster of differentiation 44 (CD44) and CD54 in GES‑1 cells or tissues of patients with gastritis and gastric cancer in vitro or in vivo. Simultaneously, the migration and invasion abilities of normal gastric epithelial GES‑1 cells were increased following HP infection. These observations demonstrated that the inflammatory response of HP infection could cause normal gastric epithelial cells to undergo significant cancerous reactions, indicating that HP is a risk factor for gastric cancer.
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Affiliation(s)
- Jianjun Wang
- Department of Clinical Laboratory, Kunshan First People's Hospital, Affiliated to Jiangsu University, Kunshan, Jiangsu 215300, P.R. China
| | - Yongliang Yao
- Department of Clinical Laboratory, Kunshan First People's Hospital, Affiliated to Jiangsu University, Kunshan, Jiangsu 215300, P.R. China
| | - Qinghui Zhang
- Department of Clinical Laboratory, Kunshan First People's Hospital, Affiliated to Jiangsu University, Kunshan, Jiangsu 215300, P.R. China
| | - Shasha Li
- Department of Clinical Laboratory, Kunshan First People's Hospital, Affiliated to Jiangsu University, Kunshan, Jiangsu 215300, P.R. China
| | - Lijun Tang
- Molecular Biology Research Center, School of Life Science, Central South University, Changsha, Hunan 410078, P.R. China
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