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Hu Y, Wang Y, Hu X, Chao H, Li S, Ni Q, Zhu Y, Hu Y, Zhao Z, Chen M. T4SEpp: A pipeline integrating protein language models to predict bacterial type IV secreted effectors. Comput Struct Biotechnol J 2024; 23:801-812. [PMID: 38328004 PMCID: PMC10847861 DOI: 10.1016/j.csbj.2024.01.015] [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: 09/21/2023] [Revised: 01/20/2024] [Accepted: 01/20/2024] [Indexed: 02/09/2024] Open
Abstract
Many pathogenic bacteria use type IV secretion systems (T4SSs) to deliver effectors (T4SEs) into the cytoplasm of eukaryotic cells, causing diseases. The identification of effectors is a crucial step in understanding the mechanisms of bacterial pathogenicity, but this remains a major challenge. In this study, we used the full-length embedding features generated by six pre-trained protein language models to train classifiers predicting T4SEs and compared their performance. We integrated three modules into a model called T4SEpp. The first module searched for full-length homologs of known T4SEs, signal sequences, and effector domains; the second module fine-tuned a machine learning model using data for a signal sequence feature; and the third module used the three best-performing pre-trained protein language models. T4SEpp outperformed other state-of-the-art (SOTA) software tools, achieving ∼0.98 accuracy at a high specificity of ∼0.99, based on the assessment of an independent validation dataset. T4SEpp predicted 13 T4SEs from Helicobacter pylori, including the well-known CagA and 12 other potential ones, among which eleven could potentially interact with human proteins. This suggests that these potential T4SEs may be associated with the pathogenicity of H. pylori. Overall, T4SEpp provides a better solution to assist in the identification of bacterial T4SEs and facilitates studies of bacterial pathogenicity. T4SEpp is freely accessible at https://bis.zju.edu.cn/T4SEpp.
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Affiliation(s)
- Yueming Hu
- Department of Bioinformatics, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Yejun Wang
- Youth Innovation Team of Medical Bioinformatics, Shenzhen University Medical School, Shenzhen, China
- Department of Cell Biology and Genetics, College of Basic Medicine, Shenzhen University Medical School, Shenzhen, China
| | - Xiaotian Hu
- Department of Bioinformatics, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Haoyu Chao
- Department of Bioinformatics, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Sida Li
- Department of Bioinformatics, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Qinyang Ni
- Department of Bioinformatics, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Yanyan Zhu
- Department of Bioinformatics, College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Yixue Hu
- Youth Innovation Team of Medical Bioinformatics, Shenzhen University Medical School, Shenzhen, China
| | - Ziyi Zhao
- Youth Innovation Team of Medical Bioinformatics, Shenzhen University Medical School, Shenzhen, China
| | - Ming Chen
- Department of Bioinformatics, College of Life Sciences, Zhejiang University, Hangzhou, China
- Institute of Hematology, Zhejiang University School of Medicine, The First Affiliated Hospital, Zhejiang University, Hangzhou 310058, China
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Weisy OKM, Kedia RA, Mahmoud I, Abu Odeh RO, Mussa BM, Abusnana S, Soliman SSM, Muhammad JS, Hamad M, Ghemrawi R, Khoder G. Assessment of Helicobacter pylori cytotoxin-associated Gene A (Cag A) protein and its association with ferritin and vitamin B12 deficiencies among adult healthy asymptomatic residents in Sharjah, United Arab Emirates. Heliyon 2024; 10:e32141. [PMID: 38882276 PMCID: PMC11180313 DOI: 10.1016/j.heliyon.2024.e32141] [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: 01/04/2024] [Revised: 05/28/2024] [Accepted: 05/29/2024] [Indexed: 06/18/2024] Open
Abstract
The United Arab Emirates (UAE) serves as an effective epidemiological site for assessing Helicobacter pylori (H. pylori) infection due to its diverse population. However, comprehensive studies on the prevalence of H. pylori in the UAE are notably scarce. In depth prevalence studies are needed as a preventive measure against gastric cancer and other emerging extra gastric diseases associated with H. pylori infection. Aim: This study aimed to assess H. pylori infection and its virulent oncoprotein, the Cytotoxin-Associated Gene (Cag A) and its association with ferritin and vitamin B12 deficiencies. Methods: The study was conducted on 1094 healthy asymptomatic volunteers residents in the Sharjah Emirate, UAE. Enzyme-linked immunosorbent assay (ELISA) was performed to assess H. pylori infection using H. pylori antibodies (IgG), and detection of CagA protein using Cag A antibody (IgG) in the human serum. Ferritin and vitamin B12 serum levels were assessed and correlated to H. pylori infection. Results: This study focuses mainly on the assessment of H. pylori and its virulent factor CagA, in relation to vitamin B12 and ferritin deficiencies. Remarkably, 49.6 % of the participants were detected positive for H. pylori, with over half of these cases involving CagA positive strains. Notably, among Emirati participants, 76.11 % of those with H. pylori infection were CagA positive. Statistical analysis revealed a significant correlation between H. pylori, CagA level, and ferritin/vitamin B12 deficiencies. Conclusion: These findings emphasize the importance of timely detection and eradication of H. pylori not only as a preventive strategy against gastric cancer but also as an effective strategy to rescue the adverse effects from ferritin and vitamin B12 deficiencies, thereby improving the overall health outcomes of individuals affected by H. pylori infection.
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Affiliation(s)
- Om Kolthoom M Weisy
- Department of Pharmaceutics and Pharmaceuticals Technology, College of Pharmacy, University of Sharjah, Sharjah, United Arab Emirates
| | - Reena A Kedia
- Research Institute for Medical & Health Sciences, University of Sharjah, United Arab Emirates
| | - Ibrahim Mahmoud
- Department of Family and Community Medicine and Behavioral Sciences, College of Medicine, University of Sharjah, Sharjah, United Arab Emirates
| | - Raed O Abu Odeh
- Research Institute for Medical & Health Sciences, University of Sharjah, United Arab Emirates
- Department of Medical Laboratory Sciences, College of Health Sciences, University of Sharjah, Sharjah, United Arab Emirates
| | - Bashair M Mussa
- Department of Basic Medical Sciences, College of Medicine, University of Sharjah, Sharjah, United Arab Emirates
| | - Salah Abusnana
- Diabetes and Endocrinology Department, University Hospital Sharjah, Sharjah, United Arab Emirates
- Clinical Science Department, College of Medicine, University of Sharjah, Sharjah, United Arab Emirates
| | - Sameh S M Soliman
- Department of Medicinal Chemistry, College of Pharmacy, University of Sharjah, Sharjah, United Arab Emirates
| | - Jibran Sualeh Muhammad
- Research Institute for Medical & Health Sciences, University of Sharjah, United Arab Emirates
- Department of Basic Medical Sciences, College of Medicine, University of Sharjah, Sharjah, United Arab Emirates
| | - Mohamad Hamad
- Research Institute for Medical & Health Sciences, University of Sharjah, United Arab Emirates
- Department of Medical Laboratory Sciences, College of Health Sciences, University of Sharjah, Sharjah, United Arab Emirates
| | - Rose Ghemrawi
- College of Pharmacy, Al Ain University, Abu Dhabi, United Arab Emirates
- AAU Health and Biomedical Research Center, Al Ain University, Abu Dhabi, United Arab Emirates
| | - Ghalia Khoder
- Department of Pharmaceutics and Pharmaceuticals Technology, College of Pharmacy, University of Sharjah, Sharjah, United Arab Emirates
- Research Institute for Medical & Health Sciences, University of Sharjah, United Arab Emirates
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Bhat AA, Kukreti N, Afzal M, Goyal A, Thapa R, Ali H, Shahwan M, Almalki WH, Kazmi I, Alzarea SI, Singh SK, Dua K, Gupta G. Ferroptosis and circular RNAs: new horizons in cancer therapy. EXCLI JOURNAL 2024; 23:570-599. [PMID: 38887390 PMCID: PMC11180955 DOI: 10.17179/excli2024-7005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Accepted: 04/09/2024] [Indexed: 06/20/2024]
Abstract
Cancer poses intricate challenges to treatment due to its complexity and diversity. Ferroptosis and circular RNAs (circRNAs) are emerging as innovative therapeutic avenues amid the evolving landscape of cancer therapy. Extensive investigations into circRNAs reveal their diverse roles, ranging from molecular regulators to pivotal influencers of ferroptosis in cancer cell lines. The results underscore the significance of circRNAs in modulating molecular pathways that impact crucial aspects of cancer development, including cell survival, proliferation, and metastasis. A detailed analysis delineates these pathways, shedding light on the molecular mechanisms through which circRNAs influence ferroptosis. Building upon recent experimental findings, the study evaluates the therapeutic potential of targeting circRNAs to induce ferroptosis. By identifying specific circRNAs associated with the etiology of cancer, this analysis paves the way for the development of targeted therapeutics that exploit vulnerabilities in cancer cells. This review consolidates the existing understanding of ferroptosis and circRNAs, emphasizing their role in cancer therapy and providing impetus for ongoing research in this dynamic field. See also the graphical abstract(Fig. 1).
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Affiliation(s)
- Asif Ahmad Bhat
- School of Pharmacy, Suresh Gyan Vihar University, Jagatpura, Mahal Road, Jaipur, India
| | - Neelima Kukreti
- School of Pharmacy, Graphic Era Hill University, Dehradun 248007, India
| | - Muhammad Afzal
- Department of Pharmaceutical Sciences, Pharmacy Program, Batterjee Medical College, P.O. Box 6231, Jeddah 21442, Saudi Arabia
| | - Ahsas Goyal
- Institute of Pharmaceutical Research, GLA University, Mathura, U. P., India
| | - Riya Thapa
- School of Pharmacy, Suresh Gyan Vihar University, Jagatpura, Mahal Road, Jaipur, India
| | - Haider Ali
- Center for Global Health Research, Saveetha Medical College, Saveetha Institute of Medical and Technical Sciences, Saveetha University, India
- Department of Pharmacology, Kyrgyz State Medical College, Bishkek, Kyrgyzstan
| | - Moyad Shahwan
- Department of Clinical Sciences, College of Pharmacy and Health Sciences, Ajman University, Ajman, 346, United Arab Emirates
- Centre of Medical and Bio-allied Health Sciences Research, Ajman University, Ajman, Ajman, 346, United Arab Emirates
| | - Waleed Hassan Almalki
- Department of Pharmacology, College of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Imran Kazmi
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, 21589, Jeddah, Saudi Arabia
| | - Sami I. Alzarea
- Department of Pharmacology, College of Pharmacy, Jouf University, 72341, Sakaka, Al-Jouf, Saudi Arabia
| | - Sachin Kumar Singh
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara 144411, India
- Faculty of Health, Australian Research Center in Complementary and Integrative Medicine, University of Technology, Sydney, Ultimo-NSW 2007, Australia
- School of Medical and Life Sciences, Sunway University, Sunway, Malaysia
| | - Kamal Dua
- Faculty of Health, Australian Research Center in Complementary and Integrative Medicine, University of Technology, Sydney, Ultimo-NSW 2007, Australia
- Discipline of Pharmacy, Graduate School of Health, University of Technology, Sydney, Ultimo-NSW 2007, Australia
- Uttaranchal Institute of Pharmaceutical Sciences, Uttaranchal University, Dehradun, India
| | - Gaurav Gupta
- School of Pharmacy, Suresh Gyan Vihar University, Jagatpura, Mahal Road, Jaipur, India
- Centre of Medical and Bio-allied Health Sciences Research, Ajman University, Ajman, Ajman, 346, United Arab Emirates
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Xu Y, Chen F, Wen H. Global incidence and prevalence of gastritis and duodenitis from 1990 to 2019: A systematic analysis for the Global Burden of Disease Study 2019. J Gastroenterol Hepatol 2024. [PMID: 38622968 DOI: 10.1111/jgh.16572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Accepted: 03/26/2024] [Indexed: 04/17/2024]
Abstract
BACKGROUND AND AIM Gastritis and duodenitis, prevalent diseases of the digestive system, impose a significant global burden. This study aimed to examine their incidence and prevalence patterns worldwide, including changes over the past 30 years. METHODS The age-standardized incidence rate (ASIR) and age-standardized prevalence rate (ASPR) of gastritis and duodenitis, stratified by age, sex, geographical region, and sociodemographic index (SDI), were obtained from the Global Burden of Disease 2019. The dynamic trends were captured by calculating the average annual percentage changes (AAPC). RESULTS In 2019, the global ASIR and ASPR of gastritis and duodenitis were 379.88/100 000 (95% uncertainty interval [UI]: 312.42/100 000-448.12/100 000) and 518.11/100 000 (95% UI: 420.62/100 000-631.66/100 000), respectively. The highest rates were observed among the 50-69 age group (ASIR: 856.48/100 000; ASPR: 1158.04/100 000) and in low SDI regions (ASIR: 443.33/100 000; ASPR: 631.22/100 000). From 1990 to 2019, there was a significant decrease in global ASIR (AAPC = -0.34%, 95% confidence interval [CI]: -0.36% to -0.31%) and ASPR (AAPC = -0.34%, 95% CI: -0.37% to -0.31%) of gastritis and duodenitis. However, ASIR (AAPC = 0.47%, 95% CI: 0.42%-0.52%) and ASPR (AAPC = 0.51%, 95% CI: 0.47%-0.52%) of gastritis and duodenitis experienced a significant increase in low SDI regions. CONCLUSIONS Despite a significant decrease in the global incidence and prevalence of gastritis and duodenitis, these conditions continue to impose a burden on individuals aged 50-69 years and low SDI regions. Targeted interventions for those specific populations and regions are necessary.
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Affiliation(s)
- Yinling Xu
- Department of Gastroenterology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Feichi Chen
- Department of Neurology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Heli Wen
- Department of Gastroenterology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
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Dhindwal P, Boniecki MT, Moore SA. Helicobacter pylori FlgN binds its substrate FlgK and the flagellum ATPase FliI in a similar manner observed for the FliT chaperone. Protein Sci 2024; 33:e4882. [PMID: 38151822 PMCID: PMC10804663 DOI: 10.1002/pro.4882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 12/19/2023] [Accepted: 12/20/2023] [Indexed: 12/29/2023]
Abstract
In bacterial flagellum biogenesis, secretion of the hook-filament junction proteins FlgK and FlgL and completion of the flagellum requires the FlgN chaperone. Similarly, the related FliT chaperone is necessary for the secretion of the filament cap protein FliD and binds the flagellar export gate protein FlhA and the flagellum ATPase FliI. FlgN and FliT require FliJ for effective substrate secretion. In Helicobacter pylori, neither FlgN, FliT, nor FliJ have been annotated. We demonstrate that the genome location of HP1120 is identical to that of flgN in other flagellated bacteria and that HP1120 is the homolog of Campylobacter jejuni FlgN. A modeled HP1120 structure contains three α-helices and resembles the FliT chaperone, sharing a similar substrate-binding pocket. Using pulldowns and thermophoresis, we show that both HP1120 and a HP1120Δ126-144 deletion mutant bind to FlgK with nanomolar affinity, but not to the filament cap protein FliD, confirming that HP1120 is FlgN. Based on size-exclusion chromatography and multi-angle light scattering, H. pylori FlgN binds to FlgK with 1:1 stoichiometry. Overall structural similarities between FlgN and FliT suggest that substrate recognition on FlgN primarily involves an antiparallel coiled-coil interface between the third helix of FlgN and the C-terminal helix of the substrate. A FlgNΔ126-144 N100A, Y103A, S111I triple mutant targeting this interface significantly impairs the binding of FlgK. Finally, we demonstrate that FlgNΔ126-144 , like FliT, binds with sub-micromolar affinity to the flagellum ATPase FliI or its N-terminal domain. Hence FlgN and FliT likely couple delivery of low-abundance export substrates to the flagellum ATPase FliI.
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Affiliation(s)
- Poonam Dhindwal
- Department of Biochemistry, Microbiology and ImmunologyCollege of Medicine, University of SaskatchewanSaskatoonCanada
| | - Michal T. Boniecki
- Department of Biochemistry, Microbiology and ImmunologyCollege of Medicine, University of SaskatchewanSaskatoonCanada
| | - Stanley A. Moore
- Department of Biochemistry, Microbiology and ImmunologyCollege of Medicine, University of SaskatchewanSaskatoonCanada
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Shuman JHB, Lin AS, Westland MD, Bryant KN, Piazuelo MB, Reyzer ML, Judd AM, McDonald WH, McClain MS, Schey KL, Algood HMS, Cover TL. Remodeling of the gastric environment in Helicobacter pylori-induced atrophic gastritis. mSystems 2024; 9:e0109823. [PMID: 38059647 PMCID: PMC10805037 DOI: 10.1128/msystems.01098-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Accepted: 10/16/2023] [Indexed: 12/08/2023] Open
Abstract
Helicobacter pylori colonization of the human stomach is a strong risk factor for gastric cancer. To investigate H. pylori-induced gastric molecular alterations, we used a Mongolian gerbil model of gastric carcinogenesis. Histologic evaluation revealed varying levels of atrophic gastritis (a premalignant condition characterized by parietal and chief cell loss) in H. pylori-infected animals, and transcriptional profiling revealed a loss of markers for these cell types. We then assessed the spatial distribution and relative abundance of proteins in the gastric tissues using imaging mass spectrometry and liquid chromatography with tandem mass spectrometry. We detected striking differences in the protein content of corpus and antrum tissues. Four hundred ninety-two proteins were preferentially localized to the corpus in uninfected animals. The abundance of 91 of these proteins was reduced in H. pylori-infected corpus tissues exhibiting atrophic gastritis compared with infected corpus tissues exhibiting non-atrophic gastritis or uninfected corpus tissues; these included numerous proteins with metabolic functions. Fifty proteins localized to the corpus in uninfected animals were diffusely delocalized throughout the stomach in infected tissues with atrophic gastritis; these included numerous proteins with roles in protein processing. The corresponding alterations were not detected in animals infected with a H. pylori ∆cagT mutant (lacking Cag type IV secretion system activity). These results indicate that H. pylori can cause loss of proteins normally localized to the gastric corpus as well as diffuse delocalization of corpus-specific proteins, resulting in marked changes in the normal gastric molecular partitioning into distinct corpus and antrum regions.IMPORTANCEA normal stomach is organized into distinct regions known as the corpus and antrum, which have different functions, cell types, and gland architectures. Previous studies have primarily used histologic methods to differentiate these regions and detect H. pylori-induced alterations leading to stomach cancer. In this study, we investigated H. pylori-induced gastric molecular alterations in a Mongolian gerbil model of carcinogenesis. We report the detection of numerous proteins that are preferentially localized to the gastric corpus but not the antrum in a normal stomach. We show that stomachs with H. pylori-induced atrophic gastritis (a precancerous condition characterized by the loss of specialized cell types) exhibit marked changes in the abundance and localization of proteins normally localized to the gastric corpus. These results provide new insights into H. pylori-induced gastric molecular alterations that are associated with the development of stomach cancer.
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Affiliation(s)
- Jennifer H. B. Shuman
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Aung Soe Lin
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Mandy D. Westland
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Kaeli N. Bryant
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - M. Blanca Piazuelo
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Michelle L. Reyzer
- Mass Spectrometry Research Center, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Audra M. Judd
- Mass Spectrometry Research Center, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - W. Hayes McDonald
- Mass Spectrometry Research Center, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Mark S. McClain
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
- Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Kevin L. Schey
- Mass Spectrometry Research Center, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
- Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Holly M. S. Algood
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
- Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA
| | - Timothy L. Cover
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
- Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA
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7
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Roszczenko-Jasińska P, Giełdoń A, Mazur D, Spodzieja M, Plichta M, Czaplewski C, Bal W, Jagusztyn-Krynicka EK, Bartosik D. Exploring the inhibitory potential of in silico-designed small peptides on Helicobacter pylori Hp0231 (DsbK), a periplasmic oxidoreductase involved in disulfide bond formation. Front Mol Biosci 2024; 10:1335704. [PMID: 38274095 PMCID: PMC10810133 DOI: 10.3389/fmolb.2023.1335704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 12/12/2023] [Indexed: 01/27/2024] Open
Abstract
Introduction: Helicobacter pylori is a bacterium that colonizes the gastric epithelium, which affects millions of people worldwide. H. pylori infection can lead to various gastrointestinal diseases, including gastric adenocarcinoma and mucosa-associated lymphoid tissue lymphoma. Conventional antibiotic therapies face challenges due to increasing antibiotic resistance and patient non-compliance, necessitating the exploration of alternative treatment approaches. In this study, we focused on Hp0231 (DsbK), an essential component of the H. pylori Dsb (disulfide bond) oxidative pathway, and investigated peptide-based inhibition as a potential therapeutic strategy. Methods: Three inhibitory peptides designed by computational modeling were evaluated for their effectiveness using a time-resolved fluorescence assay. We also examined the binding affinity between Hp0231 and the peptides using microscale thermophoresis. Results and discussion: Our findings demonstrate that in silico-designed synthetic peptides can effectively inhibit Hp0231-mediated peptide oxidation. Targeting Hp0231 oxidase activity could attenuate H. pylori virulence without compromising bacterial viability. Therefore, peptide-based inhibitors of Hp0231 could be candidates for the development of new targeted strategy, which does not influence the composition of the natural human microbiome, but deprive the bacterium of its pathogenic properties.
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Affiliation(s)
- Paula Roszczenko-Jasińska
- Department of Bacterial Genetics, Institute of Microbiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | - Artur Giełdoń
- Faculty of Chemistry, University of Gdańsk, Gdańsk, Poland
| | - Dominika Mazur
- Department of Bacterial Genetics, Institute of Microbiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
| | | | - Maciej Plichta
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | | | - Wojciech Bal
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw, Poland
| | | | - Dariusz Bartosik
- Department of Bacterial Genetics, Institute of Microbiology, Faculty of Biology, University of Warsaw, Warsaw, Poland
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8
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Xu X, Qian Y, Jin K, Chen J, Fu J, Chen C, Zhu Z. The impact of Helicobacter pylori infection on low skeletal muscle mass risk in Chinese women over 40: a cross-sectional analysis. Front Cell Infect Microbiol 2024; 13:1289909. [PMID: 38235492 PMCID: PMC10791812 DOI: 10.3389/fcimb.2023.1289909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 12/08/2023] [Indexed: 01/19/2024] Open
Abstract
Background Sarcopenia can lead to significant personal, social, and economic burdens. The diagnosis of sarcopenia heavily relies on the identification of Low Skeletal Muscle Mass (LSMM), which is an independent predictor of frailty, disability, and increased risk of death among seniors. Women have physiologically lower levels of skeletal muscle mass than men, and female sarcopenia appears to be more influenced by menopause. They also tend to have higher body fat levels than man, which increases the risk of sarcopenia obesity. On another front, it's also recognized that humans are largely prone to Helicobacter pylori (H. pylori) infection, with global prevalence rates often surpassing 50%. Nevertheless, the interconnection between H. pylori infection and LSMM remains relatively unexplored. Hence, our study specifically targeted women as the research population and sought to explore several risk factors for LSMM. Additionally, we delved into the potential correlation between LSMM and H. pylori infection in women, hoping to gain insights into potential preventative measures or treatment options that may enhance the quality of life for women affected by sarcopenia. Methods We conducted a cross-sectional study among women aged over 18 years undergoing physical examination. We performed 13C-urea breath test (UBT) for diagnosis of H. pylori infection and Bioelectrical impedance analysis (BIA) for the assessment of LSMM. Logistic regression models were used to analyze the associations of H. pylori infection with LSMM. Results This study enrolled 1984 Chinese women who were undergoing health check-ups. A univariate logistic regression analysis did not reveal a direct correlation between H. pylori infection and LSMM among this female population (OR=1.149, 95% CI 0.904-1.459, p=0.257). Yet, upon dividing the participants into age-based subgroups, an evident link was observed between H. pylori infection and LSMM in women aged 40 or above (OR=1.381, 95%CI 1.032-1.848, p= 0.030). After adjusting for variables including Age, BMI, TP, ALK, Cre, this relationship remained statistically relevant (OR=1.514, 95%CI 1.085-2.113, p= 0.015). Conclusions Women who are over 40 years old and currently infected with H. pylori have an increased risk of developing LSMM. Therefore, timely treatment for H. pylori eradication is recommended for this group of women to reduce the occurrence of LSMM.
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Affiliation(s)
- Xiaohui Xu
- Department of Medical Care Center, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Yidan Qian
- Department of Medical Care Center, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Kejia Jin
- Department of Medical Care Center, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Junpeng Chen
- The First School of Medicine, School of Information and Engineering, Wenzhou Medical University, Wenzhou, China
| | - Jiayue Fu
- The First School of Medicine, School of Information and Engineering, Wenzhou Medical University, Wenzhou, China
| | - Chengshui Chen
- Key Laboratory of Interventional Pulmonology of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
- Department of Pulmonary and Critical Care Medicine, Quzhou People’s Hospital, The Quzhou Affiliated Hospital of Wenzhou Medical University, Quzhou, China
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Zaisheng Zhu
- Department of Medical Care Center, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
- Key Laboratory of Interventional Pulmonology of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
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9
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Tran SC, Bryant KN, Cover TL. The Helicobacter pylori cag pathogenicity island as a determinant of gastric cancer risk. Gut Microbes 2024; 16:2314201. [PMID: 38391242 PMCID: PMC10896142 DOI: 10.1080/19490976.2024.2314201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Accepted: 01/31/2024] [Indexed: 02/24/2024] Open
Abstract
Helicobacter pylori strains can be broadly classified into two groups based on whether they contain or lack a chromosomal region known as the cag pathogenicity island (cag PAI). Colonization of the human stomach with cag PAI-positive strains is associated with an increased risk of gastric cancer and peptic ulcer disease, compared to colonization with cag PAI-negative strains. The cag PAI encodes a secreted effector protein (CagA) and components of a type IV secretion system (Cag T4SS) that delivers CagA and non-protein substrates into host cells. Animal model experiments indicate that CagA and the Cag T4SS stimulate a gastric mucosal inflammatory response and contribute to the development of gastric cancer. In this review, we discuss recent studies defining structural and functional features of CagA and the Cag T4SS and mechanisms by which H. pylori strains containing the cag PAI promote the development of gastric cancer and peptic ulcer disease.
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Affiliation(s)
- Sirena C Tran
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Kaeli N Bryant
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Timothy L Cover
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, TN, USA
- Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, TN, USA
- Veterans Affairs Tennessee Valley Healthcare System, Nashville, TN, USA
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10
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Li N, Xiao X, Zhang H, Bai Z, Li M, Sun J, Dong Y, Zhu W, Fei Z, Sun X, Xiao P, Gao Y, Zhou D. Sterile soil mitigates the intergenerational loss of gut microbial diversity and anxiety-like behavior induced by antibiotics in mice. Brain Behav Immun 2024; 115:179-190. [PMID: 37848098 DOI: 10.1016/j.bbi.2023.10.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 10/10/2023] [Accepted: 10/14/2023] [Indexed: 10/19/2023] Open
Abstract
The decline in gut microbial diversity in modern humans is closely associated with the rising prevalence of various diseases. It is imperative to investigate the underlying causes of gut microbial loss and restoring methods. Although the impact of non-perinatal antibiotic use on gut microbiota has been recognized, its intergenerational effects remain unexplored. Our previous research has highlighted soil in the farm environment as a key factor for gut microbiome health by restoring gut microbial diversity and balance. In this study, we investigated the intergenerational consequences of antibiotic exposure and the therapeutic potential of sterile soil. We treated C57BL/6 mice with vancomycin and streptomycin for 2 weeks continuously, followed by a 4-8 week withdrawal period before breeding. The process was repeated across 3 generations. Half of the mice in each generation received an oral sterile soil intervention. We assessed gut microbial diversity, anxiety behavior, microglial reactivity, and gut barrier integrity across generations. Antibiotic exposure led to a decrease in gut microbial diversity over generations, along with aggravated anxiety behavior, microgliosis, and altered intestinal tight junction protein expression. Oral sterile soil intervention restored gut microbial diversity in adult mice across generations, concomitantly rescuing abnormalities in behavior, microgliosis, and intestinal barrier integrity. In conclusion, this study simulated an important process of the progressive loss of gut microbiota diversity in modern humans and demonstrated the potential of sterile soil to reverse this process. This study provides a theoretical and experimental basis for research and interventions targeting multiple modern chronic diseases related to intestinal microorganisms.
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Affiliation(s)
- Na Li
- Key Laboratory of Child Development and Learning Science of Department of Education, Southeast University, Nanjing 210096, China
| | - Xiaoao Xiao
- Key Laboratory of Cardiovascular and Cerebrovascular Medicine, School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Honglin Zhang
- College of Food Science, Nanjing Xiaozhuang University, Nanjing 211171, China
| | - Zhimao Bai
- Key Laboratory of Environmental Medicine Engineering of Ministry of Education, Southeast University, Nanjing 210009, China
| | - Mengjie Li
- Key Laboratory of Child Development and Learning Science of Department of Education, Southeast University, Nanjing 210096, China
| | - Jia Sun
- Key Laboratory of Cardiovascular and Cerebrovascular Medicine, School of Pharmacy, Nanjing Medical University, Nanjing 211166, China
| | - Yangyang Dong
- Key Laboratory of Child Development and Learning Science of Department of Education, Southeast University, Nanjing 210096, China
| | - Wenyong Zhu
- State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China
| | - Zhongjie Fei
- State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China
| | - Xiao Sun
- State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China
| | - Pengfeng Xiao
- State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China
| | - Yuanqing Gao
- Key Laboratory of Cardiovascular and Cerebrovascular Medicine, School of Pharmacy, Nanjing Medical University, Nanjing 211166, China.
| | - Dongrui Zhou
- Key Laboratory of Child Development and Learning Science of Department of Education, Southeast University, Nanjing 210096, China.
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11
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Liu T, Guo Y, Liao Y, Liu J. Mechanism-guided fine-tuned microbiome potentiates anti-tumor immunity in HCC. Front Immunol 2023; 14:1333864. [PMID: 38169837 PMCID: PMC10758498 DOI: 10.3389/fimmu.2023.1333864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 12/05/2023] [Indexed: 01/05/2024] Open
Abstract
Microbiome, including bacteria, fungi, and viruses, plays a crucial role in shaping distal and proximal anti-tumor immunity. Mounting evidence showed that commensal microbiome critically modulates immunophenotyping of hepatocellular carcinoma (HCC), a leading cause of cancer-related death. However, their role in anti-tumor surveillance of HCC is still poorly understood. Herein, we spotlighted growing interests in how the microbiome influences the progression and immunotherapeutic responses of HCC via changing local tumor microenvironment (TME) upon translocating to the sites of HCC through different "cell-type niches". Moreover, we summarized not only the associations but also the deep insight into the mechanisms of how the extrinsic microbiomes interplay with hosts to shape immune surveillance and regulate TME and immunotherapeutic responses. Collectively, we provided a rationale for a mechanism-guided fine-tuned microbiome to be neoadjuvant immunotherapy in the near future.
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Affiliation(s)
- Tao Liu
- State Key Laboratory of Oncology in South China, Guangdong Provincial Clinical Research Center for Cancer, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Ya Guo
- State Key Laboratory of Oncology in South China, Guangdong Provincial Clinical Research Center for Cancer, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Yanxia Liao
- State Key Laboratory of Oncology in South China, Guangdong Provincial Clinical Research Center for Cancer, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Jinping Liu
- State Key Laboratory of Oncology in South China, Guangdong Provincial Clinical Research Center for Cancer, Sun Yat-sen University Cancer Center, Guangzhou, China
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12
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O'Connor HJ. Forty years of Helicobacter pylori infection and changes in findings at esophagogastroduodenoscopy. Helicobacter 2023; 28:e13026. [PMID: 37818739 DOI: 10.1111/hel.13026] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 09/24/2023] [Accepted: 09/26/2023] [Indexed: 10/13/2023]
Abstract
BACKGROUND It is 40 years since the discovery of Helicobacter pylori infection. Over that time major changes have occurred in esophagogastroduodenoscopy (EGD) findings. The aim of this review is to describe these changes, and the important role H. pylori infection has played in their evolution. METHODS References were identified through searches of PubMed using the search terms-endoscopy time trends, peptic ulcer disease, gastroesophageal reflux disease, upper gastrointestinal cancer, gastric polyps, H. pylori, eosinophilic gastrointestinal disorders, and celiac disease, from 1970 through December 2021. RESULTS The prevalence of H. pylori infection has fallen and consequently, H. pylori-positive peptic ulcer disease has become rare. Gastroesophageal reflux disease is now the commonest disorder diagnosed at EGD, and Barrett's esophagus has increased in parallel. Cancer of the distal stomach has fallen while esophageal adenocarcinoma and reflux-related cardia cancer have risen. Gastric polyps have changed from hyperplastic and adenomas to sporadic fundic gland polyps. Antimicrobial resistance has made H. pylori infection more difficult to eradicate. Eosinophilic gastrointestinal disorders, particularly eosinophilic esophagitis, have emerged as important new allergic disorders. Celiac disease has changed and increased. CONCLUSIONS EGD findings appear to have changed from features suggesting a H. pylori-positive "phenotype" 40 years ago to a H. pylori-negative "phenotype" today. These changes have major implications for the management of gastrointestinal disorders.
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Affiliation(s)
- Humphrey J O'Connor
- Trinity Academic Gastroenterology Group, Trinity Centre for Health Sciences, The University of Dublin, Tallaght University Hospital, Dublin, Ireland
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13
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Izhari MA, Al Mutawa OA, Mahzari A, Alotaibi EA, Almashary MA, Alshahrani JA, Gosady ARA, Almutairi AM, Dardari DMM, AlGarni AKA. Helicobacter pylori ( H. pylori) Infection-Associated Dyslipidemia in the Asir Region of Saudi Arabia. Life (Basel) 2023; 13:2206. [PMID: 38004346 PMCID: PMC10672336 DOI: 10.3390/life13112206] [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: 10/14/2023] [Revised: 11/10/2023] [Accepted: 11/10/2023] [Indexed: 11/26/2023] Open
Abstract
OBJECTIVES H. pylori-associated dyslipidemia has been reported to be a major risk factor for atherosclerosis and coronary heart diseases. We aimed to investigate the association of the H. pylori infection with dyslipidemia. METHODS A retrospective case-control study was undertaken to evaluate H. pylori-associated dyslipidemia, where H. pylori-positive individuals were treated as the case group (n = 260) while H. pylori-negative individuals were considered as the control group (n = 250). The mean ± SD of the age of the patients included (n = 510) was 44.01 ± 13.58 years. Study subjects with a total cholesterol level of >5.17 mmol/L and/or a triglyceride level of >1.69 mmol/L and/or an LDL-C level of >2.59 mmol/L and/or an HDL-C level of <1 mmol/L in males and/or an HDL-C level of <1.3 mmol/L in females were defined as dyslipidemia. Descriptive (mean, standard deviation, median, and IQR) and inferential (t-test, chi-square test, and logistic regression) statistical analyses were undertaken using the R-base/R-studio (v-4.0.2)/tidyverse package. Univariate and bivariate logistic regressions were executed to calculate the crude and adjusted odds ratio along with the p-value. A p-value of <0.05 was the cut-off for statistical significance. We used ggplot2 for data visualization. RESULTS The differences in overall mean ± SD (H. pylori positive vs. negative) of the cholesterol (5.22 ± 1.0 vs. 5.49 ± 0.85, p < 0.01), triglyceride (1.66 ± 0.75 vs. 1.29 ± 0.71, p < 0.001), LDL-C (3.43 ± 0.74 vs. 3.26 ± 0.81, p < 0.05), and HDL-C (1.15 ± 0.30 vs. 1.30 ± 0.25, p < 0.001) levels were statistically significant. The cholesterol and LDL-C levels in ages >60, age = 30-60, in females, and LDL-C levels in males were not significantly different for the H. pylori-positive and -negative groups. The proportion (H. pylori positive vs. negative) of hypercholesterolemia (190/59.9% vs. 127/40% p < 0.01), hypertriglyceridemia (136/68% vs. 64/32% p < 0.001), high LDL-cholesterolemia levels (234/53% vs. 201/46% p < 0.01), and low HDL-cholesterolemia levels (149/71% vs. 60/28.7% p < 0.01) were statistically significant. The odds of having hypercholesterolemia (AOR: 2.64, 95%CI: 1.824-3.848, p < 0.001), hypertriglyceridemia (AOR: 3.24, 95%CI: 2.227-4.757, p < 0.001), an increased LDL-C level (AOR: 2.174, 95%CI: 1.309-3.684, p < 0.01), and a decreased HDL-C level (AOR: 4.2, 95%CI: 2.937-6.321, p < 0.001) were 2.64, 3.24, 2.17, and 4.2 times higher in the H. pylori-infected individuals as compared with the H. pylori-uninfected group. CONCLUSION Our results demonstrate that an enhanced risk of dyslipidemia is associated with the H. pylori infection, which can aggrandize the atherosclerosis process. The evaluation of temporal variation in the lipid profile in H. pylori-infected individuals is recommended for the effective management of H. pylori-infected patients.
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Affiliation(s)
- Mohammad Asrar Izhari
- Department of Laboratory Medicine, Faculty of Applied Medical Sciences, Al-Baha University, Al Baha 65522, Saudi Arabia
| | - Omar A. Al Mutawa
- Department of Laboratory Medicine, Faculty of Applied Medical Sciences, Al-Baha University, Al Baha 65522, Saudi Arabia
| | - Ali Mahzari
- Department of Laboratory Medicine, Faculty of Applied Medical Sciences, Al-Baha University, Al Baha 65522, Saudi Arabia
| | - Essa Ajmi Alotaibi
- Department of Dermatology, Al-Kharj Military Hospital, Al-Kharj 11361, Saudi Arabia
| | - Maher A. Almashary
- Medical Services Department, Armed Forces Medical Services, Riyadh 11159, Saudi Arabia
| | - Jaber Abdullah Alshahrani
- Department of Medical Training and Education, Armed Forces Hospital Southern Region, Khamis Mushait 62413, Saudi Arabia
| | - Ahmed R. A. Gosady
- Laboratory Department, Baish Primary Healthcare, Jazan 87311, Saudi Arabia
| | - Abdulrahman M Almutairi
- Health facilities Infection Control Department, General Directorate of Health, Al-Baha 11134, Saudi Arabia
| | | | - Abdul Kareem A. AlGarni
- Department of Hematology, King Saud Bin Abdulaziz University for Health Sciences, Al-Ahsa 11451, Saudi Arabia
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Giroux P, Palmer A, Thomas A, Camacho-Gomez SM. Helicobacter pylori Found Guilty of Obstructive Jaundice: A Pediatric Case Report. JPGN REPORTS 2023; 4:e348. [PMID: 38034451 PMCID: PMC10684119 DOI: 10.1097/pg9.0000000000000348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 06/15/2023] [Indexed: 12/02/2023]
Abstract
Pediatric Helicobacter pylori infection represents a small proportion of disease that is otherwise decreasing in the developed world. Typical presentations have been well-described in the literature. We report a 15-year-old male who presented with jaundice, anemia, dark urine, and poorly characterized abdominal pain and was found to have obstructive jaundice secondary to a duodenal ulcer resulting from H. pylori infection. Obstructive jaundice is a seldom reported complication of duodenal ulcer, particularly in children. This report reviews H. pylori infection, outlines complications of peptic ulcer disease, and illustrates the rarity of obstructive jaundice as a presenting sign of duodenal ulcer in children.
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Affiliation(s)
- Parker Giroux
- From the Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Children's of Mississippi, University of Mississippi Medical Center, Jackson, MS
| | - Andrew Palmer
- Department of Radiology, University of Mississippi Medical Center, Jackson, MS
| | - Aby Thomas
- Department of Radiology, University of Mississippi Medical Center, Jackson, MS
| | - Sandra Mabel Camacho-Gomez
- From the Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Children's of Mississippi, University of Mississippi Medical Center, Jackson, MS
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15
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Wang S, De Paepe K, Van de Wiele T, Fu X, Wang S, Zhang B, Huang Q. Starch-entrapped microspheres enhance gut microbiome-mediated anti-obesity effects of resistant starch in high-fat diet induced obese C57BL/6J mice. Food Res Int 2023; 172:113215. [PMID: 37689957 DOI: 10.1016/j.foodres.2023.113215] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 06/27/2023] [Accepted: 06/29/2023] [Indexed: 09/11/2023]
Abstract
The prevalence of obesity is growing worldwide and has been extensively linked to gut microbiota dysbiosis. In addition to exercise and physical activity, fiber-rich foods may be a first-line prophylactic to manage obesity. This study investigated in vivo dietary intervention with high-amylose maize starch (HAMS) and starch-entrapped microspheres (MS) to treat high-fat diet induced metabolic disorder and gut microbiome dysbiosis in mice. MS more efficiently controlled body weight as well as adipose tissue mass compared to HAMS. Furthermore, MS significantly reduced blood glucose, insulin, lipid and pro-inflammatory cytokine levels compared to the high-fat diet, while the effects of HAMS were less pronounced. The MS-altered gut microbiota composition favoring Streptococcaceae, Bacilli, Firmicutes and unclassified Clostridiales was predicted to promote fatty acid, pantothenate and Coenzyme A biosynthesis. In line with this, elevated fecal short chain fatty acid (SCFA), in particular, propionate concentration was observed in MS-fed mice. Our study provides novel insights into the mechanistic action of MS on intestinal homeostasis, providing a basis for future dietary therapeutic applications.
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Affiliation(s)
- Shaokang Wang
- State Key Laboratory of Food Nutrition and Safety, School of Food Science and Engineering, Tianjin University of Science & Technology, Tianjin 300457, China; School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Center for Microbial Ecology and Technology (CMET), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium
| | - Kim De Paepe
- Center for Microbial Ecology and Technology (CMET), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium
| | - Tom Van de Wiele
- Center for Microbial Ecology and Technology (CMET), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent, Belgium
| | - Xiong Fu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center), Guangzhou 510640, China
| | - Shujun Wang
- State Key Laboratory of Food Nutrition and Safety, School of Food Science and Engineering, Tianjin University of Science & Technology, Tianjin 300457, China
| | - Bin Zhang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center), Guangzhou 510640, China; China-Singapore International Research Institute, Guangzhou 510555, China.
| | - Qiang Huang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China; Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Human Health (111 Center), Guangzhou 510640, China; China-Singapore International Research Institute, Guangzhou 510555, China.
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16
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Tran SC, McClain MS, Cover TL. Role of the CagY antenna projection in Helicobacter pylori Cag type IV secretion system activity. Infect Immun 2023; 91:e0015023. [PMID: 37638724 PMCID: PMC10501215 DOI: 10.1128/iai.00150-23] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 07/07/2023] [Indexed: 08/29/2023] Open
Abstract
Helicobacter pylori strains containing the cag pathogenicity island (PAI) are associated with the development of gastric adenocarcinoma and peptic ulcer disease. The cag PAI encodes a secreted effector protein (CagA) and a type IV secretion system (Cag T4SS). Cag T4SS activity is required for the delivery of CagA and non-protein substrates into host cells. The Cag T4SS outer membrane core complex (OMCC) contains a channel-like domain formed by helix-loop-helix elements (antenna projections, AP) from 14 copies of the CagY protein (a VirB10 ortholog). Similar VirB10 antenna regions are present in T4SS OMCCs from multiple bacterial species and are predicted to span the outer membrane. In this study, we investigated the role of the CagY antenna region in Cag T4SS OMCC assembly and Cag T4SS function. An H. pylori mutant strain with deletion of the entire CagY AP (∆AP) retained the capacity to produce CagY and assemble an OMCC, but it lacked T4SS activity (CagA translocation and IL-8 induction in AGS gastric epithelial cells). In contrast, a mutant strain with Gly-Ser substitutions in the unstructured CagY AP loop retained Cag T4SS activity. Mutants containing CagY AP loops with shortened lengths were defective in CagA translocation and exhibited reduced IL-8-inducing activity compared to control strains. These data indicate that the CagY AP region is required for Cag T4SS activity and that Cag T4SS activity can be modulated by altering the length of the CagY AP unstructured loop.
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Affiliation(s)
- Sirena C. Tran
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Mark S. McClain
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
- Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Timothy L. Cover
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
- Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA
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17
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Kong G, Liu Z, Lu Y, Li M, Guo H. The association between Helicobacter pylori infection and inflammatory bowel disease in children: A systematic review with meta-analysis. Medicine (Baltimore) 2023; 102:e34882. [PMID: 37682136 PMCID: PMC10489354 DOI: 10.1097/md.0000000000034882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 08/02/2023] [Indexed: 09/09/2023] Open
Abstract
BACKGROUND Available literature has reported the association of Helicobacter pylori (H pylori) infection with inflammatory bowel disease (IBD) in adults. However, only a few studies have addressed the disease in children. AIM To ascertain the correlation of H pylori infection with IBD among children. METHODS The aim of this systematic review and meta-analysis is to assess the association between H pylori infection and IBD in children. We searched databases including Cochrane, EMBASE, Google Scholar, PubMed, Medline, and Web of Science to select relevant studies. Ultimately, based on predetermined inclusion criteria, we included 6 studies that met the requirements. Review Manager and Stata software were used to extract and analyze the data from the relevant studies. In the methods, we employed both qualitative and quantitative approaches for comprehensive analysis. Qualitative analysis involved describing study designs, sample characteristics, and results, while quantitative analysis involved statistical tests such as calculating pooled risk ratios and 95% confidence intervals to evaluate the association between H pylori infection and IBD in children. Lastly, by combining the results of the individual studies, our objective is to provide a comprehensive understanding of the relationship between H pylori infection and IBD in children. RESULTS In totality, we involved 2236 participants that were recruited in 6 studies. We detected no significant difference in H pylori prevalence (9.8% vs 12.7%, P = .12) by comparing the children IBD group to controls. Among the IBD children, we estimated odds ratio (OR) of H pylori infection to 0.62 [(95% confidence interval (CI) of 0.34-1.12)]. In children suffering from ulcerative colitis (UC) and Crohn disease (CD), the H pylori infection rates were higher than in those with IBD-unclassified (IBDU).When analyzed stratified by disease of study design, In CD group [OR = 1.42, 95% CI: 0.72-2.80)] (I2 = 0%, P = .64). but no significant difference in CD group. CONCLUSIONS No correlation was found between H pylori infection and the occurrence of IBD in children.
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Affiliation(s)
- Guiping Kong
- Department of Gastroenterology, Children’s Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Zhifeng Liu
- Department of Gastroenterology, Children’s Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Yan Lu
- Department of Gastroenterology, Children’s Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Mei Li
- Department of Gastroenterology, Children’s Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Hongmei Guo
- Department of Gastroenterology, Children’s Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
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18
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Shakir SM, Shakir FA, Couturier MR. Updates to the Diagnosis and Clinical Management of Helicobacter pylori Infections. Clin Chem 2023; 69:869-880. [PMID: 37473423 DOI: 10.1093/clinchem/hvad081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 04/12/2023] [Indexed: 07/22/2023]
Abstract
BACKGROUND Helicobacter pylori (H. pylori) affects nearly half of the world's populations with high incidence and prevalence rates in developing countries. Infection with H. pylori increases the risk of developing peptic ulcer disease and gastric cancer. This review provides a summary of the prevalence and microbiology of H. pylori with emphasis on the current diagnostic methods and clinical management strategies. CONTENT This review discusses current options and developments in H. pylori diagnosis with the challenges and advantages associated with both noninvasive and invasive methods. The advantages of molecular methods for the diagnosis of H. pylori infection and prediction of clarithromycin resistance directly from stool or tissue biopsies are discussed. In addition, we provide a brief review on the treatment for H. pylori indicated in patients with evidence of active infection with the organism's antimicrobial resistance patterns taken into consideration. SUMMARY Testing for H. pylori has largely centered around fecal antigen testing, urea breath testing, and immunohistochemical staining from tissue biopsies. Culture-based diagnostics followed by phenotypic antimicrobial susceptibility testing is the gold standard for detection of resistance patterns. Due to the fastidious nature of the organism, culture methods are time consuming and labor intensive. Rapid nucleic acid amplification tests for H. pylori identification from direct specimens and molecular determination of drug resistance markers are accurate alternatives for H. pylori diagnosis but are not widely adopted. H. pylori antimicrobial resistance rates are on the rise due to the widespread use of antibiotics. Antibiotic regimens including the quadruple therapy and non-clarithromycin triple therapies have a higher success rate, with newer vonoprazon-based regimens showing promising eradication rates.
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Affiliation(s)
- Salika Mehreen Shakir
- Department of Pathology, University of Utah, Salt Lake City, UT, United States
- ARUP Laboratories, Salt Lake City, UT, United States
| | | | - Marc Roger Couturier
- Department of Pathology, University of Utah, Salt Lake City, UT, United States
- ARUP Laboratories, Salt Lake City, UT, United States
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19
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Atiq A, Hashim MMA, Khan FW, Bashir A, Zafar A, Jamil A, Chughtai AS. Morphological Spectrum of Gastritis in Endoscopic Biopsies and Its Association With Helicobacter pylori Infection. Cureus 2023; 15:e43084. [PMID: 37680419 PMCID: PMC10482354 DOI: 10.7759/cureus.43084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/07/2023] [Indexed: 09/09/2023] Open
Abstract
Introduction Helicobacter pylori (H. pylori) infection is the most common cause of gastritis. The consequences of the persistent infection range from acute ulceration to the development of gastric neoplasia. The purpose of the study is to determine the histopathological pattern of gastritis in gastric biopsies and its association with H. pylori. Materials and methods This is a retrospective study of all the gastric biopsies received in the Department of Histopathology, Chughtai Institute of Pathology, Lahore, Pakistan from January 12, 2021 to April 10, 2021. Sections were cut from formalin-fixed, paraffin-embedded (FFPE) tissue blocks. Slides were stained with routine, special and immunohistochemical stains. The cases were then blindly reviewed by two pathologists with a special interest in Gastrointestinal Pathology. Microscopic features based on updated Sydney classification were recorded. The collected data were then analyzed by using SPSS version 20 (IBM Corp., Armonk, NY). Results A total of 429 gastric biopsies were examined. Out of which, 202 (47.1%) were male and 227 (52.9%) were female with a female-to-male ratio of 1.2:1. Their ages ranged from 12 to 100 years and a peak in the fourth decade of life with a mean age of 43 years (median age 49 years). Among gastritis, activity was seen in 194 (45%) and chronicity in 237 (55%) cases. H. pylori was seen in 174 (40.5%) cases and there was a strong statistically significant association between H. pylori infection and severity of gastritis (p<0.001). Other parameters of Sydney classification, such as atrophic changes, were seen in 144 (33%) cases, and intestinal metaplasia in 10 (2.3%) cases. Conclusion H. pylori organism was the most common cause of gastritis in our environment. The severity of gastritis is directly related to the H. pylori infection. If neutrophils are identified on surface epithelium, then H. pylori should be searched with increased attention on morphology and/or on immunohistochemical stain of H. pylori. Chronic inflammation and H. pylori density can also guide treatment which is necessary to avoid complications.
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Affiliation(s)
- Aribah Atiq
- Pathology, Chughtai Institute of Pathology, Lahore, PAK
| | | | - Faria W Khan
- Histopathology, Chughtai Institute of Pathology, Lahore, PAK
| | - Azra Bashir
- Histopathology, Chughtai Institute of Pathology, Lahore, PAK
| | - Asma Zafar
- Histopathology, Chughtai Institute of Pathology, Lahore, PAK
| | - Anum Jamil
- Histopathology, Chughtai Institute of Pathology, Lahore, PAK
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20
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Pandey A, Lieu CH, Kim SS. The Local Microbiome in Esophageal Cancer and Treatment Response: A Review of Emerging Data and Future Directions. Cancers (Basel) 2023; 15:3562. [PMID: 37509225 PMCID: PMC10377659 DOI: 10.3390/cancers15143562] [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: 04/06/2023] [Revised: 06/28/2023] [Accepted: 07/04/2023] [Indexed: 07/30/2023] Open
Abstract
The incidence of esophageal cancer is increasing worldwide, with established risk factors explaining only a small fraction of cases. Currently, there are no established screening protocols in most countries, and treatment options are limited. The human microbiome has been implicated in carcinogenesis and the cancer treatment response. The advent of nucleic acid sequencing technologies has enabled more comprehensive, culture-independent bacterial identification. Across several tumor types, studies of tissue-specific microbiomes have shown associations between the overall microbiome composition, the relative abundance of specific bacteria, and tumorigenesis. Furthermore, in the era of cancer immunotherapy, several studies have demonstrated that the microbiome and specific bacteria may modify treatment responses and the risk of immune-related adverse events. DESIGN peer-reviewed, published studies describing the role of local, gastrointestinal-specific microbiota or the role of the gut microbiome in treatment responses were reviewed. PubMed was searched from 1 September 2022 to 1 November 2022, using the following terms in combination: "microbiome", "tumor microbiome", "esophageal cancer", "cancer", "cancer treatment", and "immunotherapy". Original research articles were considered, and other reviews or editorials were discarded. In total, approximately 250 articles were considered. RESULTS over 70 studies describing microbiome research in either gastrointestinal carcinogenesis or the systemic treatment response were identified and reviewed. CONCLUSIONS a growing body of evidence supports the role of the esophageal microbiome in both esophageal tumorigenesis and the immune checkpoint inhibitor response. More well-designed, comprehensive studies are required to collect the appropriate clinical, microbial, and immunophenotype data that are needed to clarify the precise role of the microbiome in esophageal carcinogenesis and treatment.
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Affiliation(s)
- Abhishek Pandey
- University of Colorado School of Medicine, Aurora, CO 80045, USA
- Department of Medicine, Division of Medical Oncology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Christopher H Lieu
- Department of Medicine, Division of Medical Oncology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Sunnie S Kim
- Department of Medicine, Division of Medical Oncology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
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21
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Han S, Deng Z, Cheung K, Lyu T, Chan P, Li Y, Ni L, Luo X, Li K. Vonoprazan-based triple and dual therapy versus bismuth-based quadruple therapy for Helicobacter pylori infection in China: a three-arm, randomised clinical trial protocol. BMC Gastroenterol 2023; 23:231. [PMID: 37420205 DOI: 10.1186/s12876-023-02872-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 07/04/2023] [Indexed: 07/09/2023] Open
Abstract
BACKGROUND Helicobacter pylori infection and associated diseases are a growing global public health issue. H. pylori infection is the major cause of gastric cancer, over 90% of duodenal ulcers, and over 70% of gastric ulcers. The infection rate of H. pylori is approximately 50%, and approximately 50% of new cases of gastric cancer worldwide occur in China. Bismuth (BI)-based quadruple therapy is recommended as the first-line treatment for H. pylori in China. Vonoprazan (VPZ), a new potassium-competitive acid blocker that can inhibit gastric acid secretion more effectively than proton pump inhibitors (PPIs), has been combined with antibiotics to effectively eradicate H. pylori. In this study, we compared the efficacy and safety of two VPZ-based therapies with that of BI-based therapy for H. pylori treatment. METHODS A three-armed randomised controlled trial (RCT) is being conducted in Shenzhen, with 327 participants recruited from the Gastroenterology Clinic of the University of Hong Kong-Shenzhen Hospital. Patients were diagnosed with H. pylori infection based on a positive 13C-urea breath test (UBT). Patients are kept naïve to their treatment and are randomly assigned in a 1:1:1 ratio to either VPZ-based triple, VPZ-based dual, or BI-based quadruple therapy for 14 days. All groups are subjected to follow-up evaluations of safety, adverse drug reactions, and clinical variables in the first, second, and fourth weeks after treatment. Successful eradication is confirmed by a negative 13C-UBT six weeks after treatment. If initial treatment fails, (1) those patients are turned to another regimen, or (2) a drug resistance test is conducted, after which an individualised treatment regimen shall be prescribed according to antimicrobial susceptibility testing. The resulting data will be evaluated using intention-treat and a per-protocol analysis. DISCUSSION This study is the a RCT aims to evaluate the efficacy and safety of 14-day VPZ-based triple and dual therapies in comparison with BI-based quadruple therapy. The outcomes of this study may allow treatment recommendations and update drug instructions in China. TRIAL REGISTRATION Chinese Clinical Trial Registry (No. ChiCTR2200056375). Registered on February 4, 2022, https://www.chictr.org.cn/showproj.aspx?proj=141314.
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Affiliation(s)
- ShaoWei Han
- Shantou University Medical College, Shantou, China
- Department of Pharmacy, University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - ZiJie Deng
- Department of Medicine, University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - KaShing Cheung
- Department of Medicine, University of Hong Kong-Shenzhen Hospital, Shenzhen, China
- Department of Medicine, School of Clinical Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, China
| | - Tao Lyu
- Department of Medicine, University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - PuiLing Chan
- Department of Pharmacy, University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Ying Li
- Department of Pharmacy, University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Li Ni
- Department of Medicine, University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - XiaPeng Luo
- Department of Medicine, University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Kuan Li
- Department of Pharmacy, Shenzhen People's Hospital, Second Clinical Medical College, Jinan University, First Affiliated Hospital, Southern University of Science and Technology, Shenzhen, China.
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22
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Giubelan A, Stancu MI, Mogoantă SS, Radu RI, Mălăescu GD. Gastric Cancer in Gorj County - a Clinical-Statistical Study. CURRENT HEALTH SCIENCES JOURNAL 2023; 49:343-350. [PMID: 38352701 PMCID: PMC10863741 DOI: 10.12865/chsj.49.03.06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Accepted: 04/11/2023] [Indexed: 02/16/2024]
Abstract
Gastric cancer (GC) is the fourth most common cause of cancer death worldwide, with about 769,000 deaths/year worldwide. Recent studies showed a continuous decrease in the incidence and mortality of gastric cancer mainly in developed countries, while the incidence remains increased in some countries in Eastern Asia and Eastern Europe. For the assessment of some parameters of gastric cancer in Gorj county, all the medical records of patients diagnosed with gastric cancer, found in the Archive of the County Emergency Hospital of Tg Jiu, were analyzed, namely the admission records within the Surgery and Oncology departments, the observation sheets of every individual patient, the biological test reports, the histopathological records of the patients with gastric cancer undergoing surgery, the histopathological records of gastric biopsies, the medical imaging records (ultrasound, x-ray, computer tomography and magnetic resonance). The analysis of the medical records showed that the disease mainly affects men, the ratio of men/women being 2/1-3/1. Most cases undergoing surgery within the County Hospital of Tg. Jiu were diagnosed in stages III or IV. The most numerous cases (over 85% of the total group of patients) were identified in people over 61 years old. The most common histopathological form of cancer was adenocarcinoma (95% of all gastric tumors).
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Affiliation(s)
- Alexandru Giubelan
- PhD Student, Doctoral School, Faculty of Medicine, Titu Maiorescu University, Bucharest, Romania
| | - Marius Ionuț Stancu
- PhD Student, Department of Histology, University of Medicine and Pharmacy of Craiova, Romania
| | - Stelian Stefănită Mogoantă
- Department of Surgery, University of Medicine and Pharmacy of Craiova, Romania
- 3rd General Surgery Clinic, Emergency County Hospital, Craiova, Romania
| | - Răzvan Ilie Radu
- Department of Interventional Cardiology, Prof. Dr. C.C. Iliescu Emergency Institute for Cardiovascular Diseases, Bucharest, Romania
| | - Gheorghe Dan Mălăescu
- Department of Nursing, Faculty of Nursing, Târgu Jiu Subsidiary, "Titu Maiorescu" University, Bucharest, Romania
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23
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Ravikumara M. Helicobacter pylori in children: think before you kill the bug! Therap Adv Gastroenterol 2023; 16:17562848231177610. [PMID: 37361453 PMCID: PMC10285598 DOI: 10.1177/17562848231177610] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 05/06/2023] [Indexed: 06/28/2023] Open
Abstract
Since the discovery of Helicobacter pylori (H. pylori) as the causative organism for gastric and duodenal ulcers four decades ago and subsequent recognition as class 1 gastric carcinogen, countless numbers of studies have been conducted and papers published, on the efficacy of various management strategies to eradicate the infection. In adults, a global consensus by the experts in the field concluded that H. pylori gastritis is an infectious disease and requires treatment irrespective of the presence or absence of symptoms due to the potential for serious complication like peptic ulcer disease and gastric neoplasia. However, although more than half the world's population harbors H. pylori, these serious complications occur only in a small minority of the infected population, even less so in childhood. More importantly, there is accumulating evidence for beneficial role of H. pylori against many chronic health conditions, from several epidemiological and laboratory studies. No doubt, eradication therapy is indicated in children with H. pylori-related peptic ulcer disease. Even though the pediatric guidelines from various learned societies recommend against a "test and treat" strategy, this is not always adhered to. With the accumulating evidence of the possible beneficial role of H. pylori, it is time to pause and think, are we causing more harm than good by eradicating H. pylori in every child who has this bug?
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Li H, Lin J, Cheng S, Chi J, Luo J, Tang Y, Zhao W, Shu Y, Liu X, Xu C. Comprehensive analysis of differences in N6-methyladenosine RNA methylomes in Helicobacter pylori infection. Front Cell Dev Biol 2023; 11:1136096. [PMID: 37363723 PMCID: PMC10289286 DOI: 10.3389/fcell.2023.1136096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Accepted: 04/13/2023] [Indexed: 06/28/2023] Open
Abstract
Background: Helicobacter pylori (H.pylori) infection is an important factor in the occurrence of human gastric diseases, but its pathogenic mechanism is not clear. N6-methyladenosine (m6A) is the most prevalent reversible methylation modification in mammalian RNA and it plays a crucial role in controlling many biological processes. However, there are no studies reported that whether H. pylori infection impacts the m6A methylation of stomach. In this study, we measured the overall level changes of m6A methylation of RNA under H. pylori infection through in vitro and in vivo experiment. Methods: The total quantity of m6A was quantified in gastric tissues of clinical patients and C57 mice with H. pylori infection, as well as acute infection model [H. pylori and GES-1 cells were cocultured for 48 h at a multiplicity of infection (MOI) from of 10:1 to 50:1]. Furthermore, we performed m6A methylation sequencing and RNA-sequencing on the cell model and RNA-sequencing on animal model. Results: Quantitative detection of RNA methylation showed that H. pylori infection group had higher m6A modification level. M6A methylation sequencing identified 2,107 significantly changed m6A methylation peaks, including 1,565 upregulated peaks and 542 downregulated peaks. A total of 2,487 mRNA was upregulated and 1,029 mRNA was downregulated. According to the comprehensive analysis of MeRIP-seq and RNA-seq, we identified 200 hypermethylation and upregulation, 129 hypermethylation but downregulation, 19 hypomethylation and downregulation and 106 hypomethylation but upregulation genes. The GO and KEGG pathway analysis of these differential methylation and regulatory genes revealed a wide range of biological functions. Moreover, combining with mice RNA-seq results, qRT- PCR showed that m6A regulators, METTL3, WTAP, FTO and ALKBH5, has significant difference; Two key genes, PTPN14 and ADAMTS1, had significant difference by qRT- PCR. Conclusion: These findings provide a basis for further investigation of the role of m6A methylation modification in H. pylori-associated gastritis.
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Affiliation(s)
- Huan Li
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Jiahui Lin
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Sha Cheng
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Jingshu Chi
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Ju Luo
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Yu Tang
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Wenfang Zhao
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Yufeng Shu
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Xiaoming Liu
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
- Hunan Key Laboratory of Non-Resolving Inflammation and Cancer, Central South University, Changsha, Hunan, China
| | - Canxia Xu
- Department of Gastroenterology, The Third Xiangya Hospital of Central South University, Changsha, Hunan, China
- Hunan Key Laboratory of Non-Resolving Inflammation and Cancer, Central South University, Changsha, Hunan, China
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25
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A Positively Selected fur-R88H Mutation Enhances Helicobacter pylori Fitness in a High-Salt Environment and Alters Fur-Dependent Regulation of Gene Expression. Infect Immun 2023; 91:e0042022. [PMID: 36633416 PMCID: PMC9933627 DOI: 10.1128/iai.00420-22] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Both Helicobacter pylori infection and a high-salt diet are risk factors for gastric cancer. We previously showed that a mutation in fur (encoding the ferric uptake regulator variant Fur-R88H) was positively selected in H. pylori strains isolated from experimentally infected Mongolian gerbils receiving a high-salt diet. In the present study, we report that continuous H. pylori growth in high-salt conditions in vitro also leads to positive selection of the fur-R88H mutation. Competition experiments with strains containing wild-type fur or fur-R88H, each labeled with unique nucleotide barcodes, showed that the fur-R88H mutation enhances H. pylori fitness under high-salt conditions but reduces H. pylori fitness under routine culture conditions. The fitness advantage of the fur-R88H mutant under high-salt conditions was abrogated by the addition of supplemental iron. To test the hypothesis that the fur-R88H mutation alters the regulatory properties of Fur, we compared the transcriptional profiles of strains containing wild-type fur or fur-R88H. Increased transcript levels of fecA2, which encodes a predicted TonB-dependent outer membrane transporter, were detected in the fur-R88H variant compared to those in the strain containing wild-type fur under both high-salt and routine conditions. Competition experiments showed that fecA2 contributes to H. pylori fitness under both high-salt and routine conditions. These results provide new insights into mechanisms by which the fur-R88H mutation confers a selective advantage to H. pylori in high-salt environments.
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26
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Sallustio F, Picerno A, Montenegro F, Cimmarusti MT, Di Leo V, Gesualdo L. The Human Virome and Its Crosslink with Glomerulonephritis and IgA Nephropathy. Int J Mol Sci 2023; 24:ijms24043897. [PMID: 36835304 PMCID: PMC9964221 DOI: 10.3390/ijms24043897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 02/05/2023] [Accepted: 02/11/2023] [Indexed: 02/17/2023] Open
Abstract
The prokaryotic, viral, fungal, and parasitic microbiome exists in a highly intricate connection with the human host. In addition to eukaryotic viruses, due to the existence of various host bacteria, phages are widely spread throughout the human body. However, it is now evident that some viral community states, as opposed to others, are indicative of health and might be linked to undesirable outcomes for the human host. Members of the virome may collaborate with the human host to retain mutualistic functions in preserving human health. Evolutionary theories contend that a particular microbe's ubiquitous existence may signify a successful partnership with the host. In this Review, we present a survey of the field's work on the human virome and highlight the role of viruses in health and disease and the relationship of the virobiota with immune system control. Moreover, we will analyze virus involvement in glomerulonephritis and in IgA nephropathy, theorizing the molecular mechanisms that may be responsible for the crosslink with these renal diseases.
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Affiliation(s)
- Fabio Sallustio
- Department of Precision and Regenerative Medicine and Ionian Area, University of Bari Aldo Moro, 70124 Bari, Italy
- Correspondence:
| | - Angela Picerno
- Department of Interdisciplinary Medicine (DIM), University of Bari Aldo Moro, 70124 Bari, Italy
| | - Francesca Montenegro
- Department of Interdisciplinary Medicine (DIM), University of Bari Aldo Moro, 70124 Bari, Italy
| | - Maria Teresa Cimmarusti
- Department of Precision and Regenerative Medicine and Ionian Area, University of Bari Aldo Moro, 70124 Bari, Italy
| | - Vincenzo Di Leo
- Department of Precision and Regenerative Medicine and Ionian Area, University of Bari Aldo Moro, 70124 Bari, Italy
| | - Loreto Gesualdo
- Department of Precision and Regenerative Medicine and Ionian Area, University of Bari Aldo Moro, 70124 Bari, Italy
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27
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Zhang J, Ning J, Fu W, Shi Y, Zhang J, Ding S. CMTM3 protects the gastric epithelial cells from apoptosis and promotes IL-8 by stabilizing NEMO during Helicobacter pylori infection. Gut Pathog 2023; 15:6. [PMID: 36782312 PMCID: PMC9924195 DOI: 10.1186/s13099-023-00533-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 02/06/2023] [Indexed: 02/15/2023] Open
Abstract
BACKGROUND CKLF-like MARVEL transmembrane domain containing 3 (CMTM3) plays an important role in cancer development. Although Helicobacter pylori (H. pylori) infection is a main cause of gastric cancer, the function of CMTM3 during H. pylori infection remains unclear. CMTM3 expression levels in tissues from H. pylori-infected patients and cells co-cultured with H. pylori were analyzed. qRT-PCR and ELISA were used to investigate the effects of CMTM3 on interleukin 8 (IL-8) expression. Annexin V/propidium iodide staining was performed to evaluate the function of CMTM3 in the apoptosis of gastric epithelial cells. Proteomic analysis was performed to explore the underlying mechanism of CMTM3 during H. pylori infection. The interaction between CMTM3 and NEMO was determined via co-immunoprecipitation, HA-ubiquitin pull-down assay, and immunofluorescence. RESULTS H. pylori induced a significant increase in CMTM3 expression. CMTM3 inhibited gastric mucosal epithelial cells from apoptosis and increased the expression level of IL-8 during H. pylori infection. KEGG pathway enrichment analysis revealed that differentially expressed proteins were involved in epithelial cell signaling in H. pylori infection. CMTM3 directly interacted with NEMO, which promoted protein stabilization by down-regulation of its ubiquitylation. CONCLUSIONS CMTM3 reduces apoptosis and promotes IL-8 expression in the gastric epithelial cells by stabilizing NEMO during H. pylori infection. These findings characterize a new role for CMTM3 in host-pathogen interactions and provide novel insight into the molecular regulation of NEMO.
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Affiliation(s)
- Jing Zhang
- grid.411642.40000 0004 0605 3760Department of Gastroenterology, Peking University Third Hospital, 49 Huayuan North Road, Haidian District, Beijing, 100191 People’s Republic of China
| | - Jing Ning
- grid.411642.40000 0004 0605 3760Department of Gastroenterology, Peking University Third Hospital, 49 Huayuan North Road, Haidian District, Beijing, 100191 People’s Republic of China
| | - Weiwei Fu
- grid.411642.40000 0004 0605 3760Department of Gastroenterology, Peking University Third Hospital, 49 Huayuan North Road, Haidian District, Beijing, 100191 People’s Republic of China
| | - Yanyan Shi
- grid.411642.40000 0004 0605 3760Research Center of Clinical Epidemiology, Peking University Third Hospital, 49 Huayuan North Road, Haidian District, Beijing, 100191 People’s Republic of China
| | - Jing Zhang
- grid.411642.40000 0004 0605 3760Department of Gastroenterology, Peking University Third Hospital, 49 Huayuan North Road, Haidian District, Beijing, 100191 People’s Republic of China
| | - Shigang Ding
- Department of Gastroenterology, Peking University Third Hospital, 49 Huayuan North Road, Haidian District, Beijing, 100191, People's Republic of China.
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28
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Helicobacter pylori Chronic-Stage Inflammation Undergoes Fluctuations That Are Altered in tlpA Mutants. Infect Immun 2023; 91:e0032222. [PMID: 36533917 PMCID: PMC9872690 DOI: 10.1128/iai.00322-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Helicobacter pylori colonizes half of the world's population and is responsible for a significant disease burden by causing gastritis, peptic ulcers, and gastric cancer. The development of host inflammation drives these diseases, but there are still open questions in the field about how H. pylori controls this process. We characterized H. pylori inflammation using an 8-month mouse infection time course and comparison of the wild type (WT) and a previously identified mutant lacking the TlpA chemoreceptor that causes elevated inflammation. Our work shows that H. pylori chronic-stage corpus inflammation undergoes surprising fluctuations, with changes in Th17 and eosinophil numbers. The H. pylori tlpA mutant changed the inflammation temporal characteristics, resulting in different inflammation from the wild type at some time points. tlpA mutants have equivalent total and gland colonization in late-stage infections. During early infection, in contrast, they show elevated gland and total colonization compared to those by WT. Our results suggest the chronic inflammation setting is dynamic and may be influenced by colonization properties of early infection.
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Hosseinzadeh N, Nazari Montazer M, Mohammadi‐Khanaposhtani M, Valizadeh Y, Amanlou M, Mahdavi M. Rational Design, Synthesis, Docking Simulation, and ADMET Prediction of Novel Barbituric‐hydrazine‐phenoxy‐1,2,3‐triazole‐acetamide Derivatives as Potent Urease Inhibitors. ChemistrySelect 2023. [DOI: 10.1002/slct.202203297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Nouraddin Hosseinzadeh
- Laboratory of Organic Synthesis and Natural Products Department of Chemistry Sharif University of Technology Tehran Iran
| | - Mohammad Nazari Montazer
- Department of Medicinal Chemistry Faculty of Pharmacy, Tehran University of Medical Sciences Tehran Iran
| | - Maryam Mohammadi‐Khanaposhtani
- Cellular and Molecular Biology Research Center Health Research Institute Babol University of Medical Sciences Babol Iran
| | - Yousef Valizadeh
- Endocrinology and Metabolism Research Center Endocrinology and Metabolism Clinical Sciences Institute Tehran University of Medical Sciences Tehran Iran
| | - Massoud Amanlou
- Department of Medicinal Chemistry Faculty of Pharmacy, Tehran University of Medical Sciences Tehran Iran
| | - Mohammad Mahdavi
- Endocrinology and Metabolism Research Center Endocrinology and Metabolism Clinical Sciences Institute Tehran University of Medical Sciences Tehran Iran
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30
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Humic substances from composted fennel residues control the inflammation induced by Helicobacter pylori infection in AGS cells. PLoS One 2023; 18:e0281631. [PMID: 36893132 PMCID: PMC9997894 DOI: 10.1371/journal.pone.0281631] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 01/28/2023] [Indexed: 03/10/2023] Open
Abstract
Helicobacter pylori (H. pylori) is a common human pathogen causing inflammation. Recent studies have suggested a sophisticated interplay between mitochondria, innate immunity and inflammatory response, thus proposing mitochondrial disfunction as the hallmark of severe inflammatory disorders. In this study, humic substances isolated from composted fennel residues (HS-FEN) were tested as potential therapeutical strategy to restore the mitochondrial physiology and control the inflammation associated with H. pylori infection. The molecular features of HS-FEN were characterized by infrared spectrometry, thermochemolysis-GC/MS, NMR spectroscopy, and high-performance size-exclusion chromatography (HPSEC), which revealed the presence of aromatic polyphenolic components arranged in a rather stable conformation. In vitro results showed antioxidant and anti-inflammatory properties of HS-FEN, that was found to increase the expression level of OPA-1 and SOD-2 genes and in AGS cells stimulated with H. pylori culture filtrate (Hpcf) and concomitantly decrease the expression level of Drp-1 gene and IL-12, IL-17 and G-CSF proteins. The hydrophobic features of HS, their conformational arrangement and large content of bioactive molecules may explain the beneficial effects of HS-FEN, that may potentially become an interesting source of anti-inflammatory agents capable to counteract or prevent the H. pylori-related inflammatory disorders.
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Wang Z, Shao SL, Xu XH, Zhao X, Wang MY, Chen A, Cong HY. Helicobacter pylori and gastric microbiota homeostasis: progress and prospects. Future Microbiol 2023; 18:137-157. [PMID: 36688318 DOI: 10.2217/fmb-2022-0102] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Helicobacter pylori, a Gram-negative microaerobic bacteria belonging to the phylum Proteobacteria, can colonize in the stomach and duodenum, and cause a series of gastrointestinal diseases such as gastritis, gastric ulcer and even gastric cancer. At present, the high diversity of the microorganisms in the stomach has been confirmed with culture-independent methods; some researchers have also studied the stomach microbiota composition at different stages of H. pylori carcinogenesis. Here, we mainly review the possible role of H. pylori-mediated microbiota changes in the occurrence and development of gastric cancer to provide new ideas for preventing H. pylori infection and regulating microecological imbalance.
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Affiliation(s)
- Zan Wang
- School of Medical Laboratory, Weifang Medical University, Weifang, Shandong, 261053, People's Republic of China
| | - Shu-Li Shao
- Department of Central Lab, Weihai Municipal Hospital. Weihai, Shandong, 264200, People's Republic of China
| | - Xiao-Han Xu
- School of Medical Laboratory, Weifang Medical University, Weifang, Shandong, 261053, People's Republic of China
| | - Xue Zhao
- School of Medical Laboratory, Weifang Medical University, Weifang, Shandong, 261053, People's Republic of China
| | - Ming-Yi Wang
- Department of Central Lab, Weihai Municipal Hospital. Weihai, Shandong, 264200, People's Republic of China
| | - Ai Chen
- School of Medical Laboratory, Weifang Medical University, Weifang, Shandong, 261053, People's Republic of China.,Department of Central Lab, Weihai Municipal Hospital. Weihai, Shandong, 264200, People's Republic of China
| | - Hai-Yan Cong
- School of Medical Laboratory, Weifang Medical University, Weifang, Shandong, 261053, People's Republic of China.,Department of Central Lab, Weihai Municipal Hospital. Weihai, Shandong, 264200, People's Republic of China
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Yamaoka Y, Saruuljavkhlan B, Alfaray RI, Linz B. Pathogenomics of Helicobacter pylori. Curr Top Microbiol Immunol 2023; 444:117-155. [PMID: 38231217 DOI: 10.1007/978-3-031-47331-9_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
The human stomach bacterium Helicobacter pylori, the causative agent of gastritis, ulcers and adenocarcinoma, possesses very high genetic diversity. H. pylori has been associated with anatomically modern humans since their origins over 100,000 years ago and has co-evolved with its human host ever since. Predominantly intrafamilial and local transmission, along with genetic isolation, genetic drift, and selection have facilitated the development of distinct bacterial populations that are characteristic for large geographical areas. H. pylori utilizes a large arsenal of virulence and colonization factors to mediate the interaction with its host. Those include various adhesins, the vacuolating cytotoxin VacA, urease, serine protease HtrA, the cytotoxin-associated genes pathogenicity island (cagPAI)-encoded type-IV secretion system and its effector protein CagA, all of which contribute to disease development. While many pathogenicity-related factors are present in all strains, some belong to the auxiliary genome and are associated with specific phylogeographic populations. H. pylori is naturally competent for DNA uptake and recombination, and its genome evolution is driven by extraordinarily high recombination and mutation rates that are by far exceeding those in other bacteria. Comparative genome analyses revealed that adaptation of H. pylori to individual hosts is associated with strong selection for particular protein variants that facilitate immune evasion, especially in surface-exposed and in secreted virulence factors. Recent studies identified single-nucleotide polymorphisms (SNPs) in H. pylori that are associated with the development of severe gastric disease, including gastric cancer. Here, we review the current knowledge about the pathogenomics of H. pylori.
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Affiliation(s)
- Yoshio Yamaoka
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, 1-1, Idaigaoka, Hasama-machi, Yufu Oita, 879-5593, Japan
- Department of Medicine, Gastroenterology and Hepatology Section, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Batsaikhan Saruuljavkhlan
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, 1-1, Idaigaoka, Hasama-machi, Yufu Oita, 879-5593, Japan
| | - Ricky Indra Alfaray
- Department of Environmental and Preventive Medicine, Oita University Faculty of Medicine, 1-1, Idaigaoka, Hasama-machi, Yufu Oita, 879-5593, Japan
- Helicobacter pylori and Microbiota Study Group, Universitas Airlangga, Surabaya, 60286, East Java, Indonesia
| | - Bodo Linz
- Division of Microbiology, Department Biology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Staudtstr. 5, 91058, Erlangen, Germany.
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Yang X, An H, He Y, Fu G, Jiang Z. Comprehensive analysis of microbiota signature across 32 cancer types. Front Oncol 2023; 13:1127225. [PMID: 36969036 PMCID: PMC10031003 DOI: 10.3389/fonc.2023.1127225] [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: 12/19/2022] [Accepted: 02/17/2023] [Indexed: 03/29/2023] Open
Abstract
Microbial communities significantly inhabit the human body. Evidence shows the interaction between the human microbiome and host cells plays a central role in multiple physiological processes and organ microenvironments. However, the majority of related studies focus on gut microbiota or specific tissues/organs, and the component signature of intratumor microbiota across various cancer types remains unclear. Here, we systematically analyzed the correlation between intratumor microbial signature with survival outcomes, genomic features, and immune profiles across 32 cancer types based on the public databases of Bacteria in Cancer (BIC) and The Cancer Genome Atlas (TCGA). Results showed the relative abundance of microbial taxa in tumors compared to normal tissues was observed as particularly noticeable. Survival analysis found that specific candidate microbial taxa were correlated with prognosis across various cancers. Then, a microbial-based scoring system (MS), which was composed of 64 candidate prognostic microbes, was established. Further analyses showed significant differences in survival status, genomic function, and immune profiles among the distinct MS subgroups. Taken together, this study reveals the diversity and complexity of microbiomes in tumors. Classifying cancer into different subtypes based on intratumor microbial signatures might reasonably reflect genomic characteristics, immune features, and survival status.
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Zhao S, Wan D, Zhong Y, Xu X. 1α, 25-Dihydroxyvitamin D3 protects gastric mucosa epithelial cells against Helicobacter pylori-infected apoptosis through a vitamin D receptor-dependent c-Raf/MEK/ERK pathway. PHARMACEUTICAL BIOLOGY 2022; 60:801-809. [PMID: 35587225 PMCID: PMC9122358 DOI: 10.1080/13880209.2022.2058559] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 03/17/2022] [Accepted: 03/22/2022] [Indexed: 05/19/2023]
Abstract
CONTEXT Due to the resistance of Helicobacter pylori to antibiotics, it is difficult to eradicate this pathogenic bacterium from the host. The role of 1α, 25-dihydroxyvitamin D3 (1,25-D3) in H. pylori-infected gastric mucosa epithelial cells remains unknown. OBJECTIVE This study investigates the protective property of 1,25-D3 against H. pylori-infected apoptosis in gastric mucosa epithelial cells and its potential molecular mechanisms. MATERIALS AND METHODS GES-1 cells were infected with H. pylori SS1 strain (MOI: 100) and treated with 1,25-D3 at 100, 200, and 300 nM for 24 h. Mice were orally gavaged with 108 CFUs of H. pylori and 25 µg/kg 1,25-D3 every other day for 1 month. CCK-8, LDH assay, TUNEL assay and western blot were used to determine the effect of 1,25-D3 on H. pylori-induced apoptosis. RESULTS H. pylori infection decreased cell viability to 59.2%, while 100-300 nM 1,25-D3 increased cell viability to 62.2%, 78.4% and 87.1%, respectively. Compared with positive control (4.53-fold), 1,25-D3 reduced caspase-3 activity to 4.49-, 2.88- and 1.49-fold, reduced caspase-6 activity to 2.36-, 1.88- and 1.50-fold, reduced caspase-9 activity to 4.55-, 2.91- and 2.01-fold. 1,25-D3 alters Bcl-2 family, caspase protein expression and c-Raf/MEK/ERK phosphorylation levels in vivo and in vitro. Suppression of 1,25-D3 in apoptosis was reliant on binding to vitamin D receptor. The pharmacological inhibition of c-Raf/MEK/ERK phosphorylation blocked the anti-apoptotic effect of 1,25-D3. DISCUSSION AND CONCLUSION 1,25-D3 protected gastric mucosa epithelial cells against H. pylori-infected apoptosis through a VDR-dependent c-Raf/MEK/ERK pathway.
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Affiliation(s)
- Shuai Zhao
- Department of Gastroenterology, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health, Beijing, China
- Pediatric Department of Yantai Yuhuangding Hospital, Qingdao University, Yantai, China
| | - Daihong Wan
- Pediatric Department of Yantai Yuhuangding Hospital, Qingdao University, Yantai, China
| | - Yaoyao Zhong
- Pediatric Department of Qingdao Women and Children’s Hospital, Qingdao University, Qingdao, China
| | - Xiwei Xu
- Department of Gastroenterology, Beijing Children’s Hospital, Capital Medical University, National Center for Children’s Health, Beijing, China
- CONTACT Xiwei Xu Department of Gastroenterology, Beijing Children’s Hospital, Capital Medical Universtiy, National Center for Children’s Health, Beijing100045, China
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Lai Y, Shi H, Wang Z, Feng Y, Bao Y, Li Y, Li J, Wu A. Incidence trends and disparities in Helicobacter pylori related malignancy among US adults, 2000-2019. Front Public Health 2022; 10:1056157. [PMID: 36518580 PMCID: PMC9743990 DOI: 10.3389/fpubh.2022.1056157] [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: 09/28/2022] [Accepted: 11/08/2022] [Indexed: 11/29/2022] Open
Abstract
Background Helicobacter pylori (H. pylori) is closely related to the carcinogenesis of gastric cancer (GC) and gastric non-Hodgkin lymphoma (NHL). However, the systemic trend analysis in H. pylori-related malignancy is limited. We aimed to determine the national incidence trend in non-cardia GC, cardia GC, and gastric NHL in the US during 2000-2019. Method In this population-based study, we included 186,769 patients with a newly diagnosed H. pylori-related malignancy, including non-cardia GC, cardia GC, and gastric NHL from the Surveillance, Epidemiology, and End Results (SEER) Registry from January 1, 2000 to December 31, 2019. We determined the age-adjusted incidence of three H. pylori-related malignancies respectively. Average annual percentage change (AAPC) in 2000-2019 was calculated to describe the incidence trends. Analyses were stratified by sex, age, race and ethnicity, geographic location and SEER registries. We also determined the 5-year incidence (during 2015-2019) by SEER registries to examine the geographic variance. Results The incidence in non-cardia GC and gastric NHL significantly decreased during 2000-2019, while the rate plateaued for cardia GC (AAPCs, -1.0% [95% CI, -1.1%-0.9%], -2.6% [95% CI, -2.9%-2.3%], and -0.2% [95% CI, -0.7%-0.3%], respectively). For non-cardia GC, the incidence significantly increased among individuals aged 20-64 years (AAPC, 0.8% [95% CI, 0.6-1.0%]). A relative slower decline in incidence was also observed for women (AAPC, -0.4% [95% CI, -0.6%-0.2%], P for interaction < 0.05). The incidence of cardia GC reduced dramatically among Hispanics (AAPC, -0.8% [95% CI, -1.4%-0.3%]), however it increased significantly among nonmetropolitan residents (AAPC, 0.8% [95% CI, 0.4-1.3%]). For gastric NHL, the decreasing incidence were significantly slower for those aged 20-64 years (AAPC, -1.5% [95% CI, -1.9-1.1%]) and Black individuals (AAPC, -1.3% [95% CI, -1.9-1.1%]). Additionally, the highest incidence was observed among Asian and the Black for non-cardia GC, while Whites had the highest incidence of cardia GC and Hispanics had the highest incidence of gastric NHL (incidence rate, 8.0, 8.0, 3.1, and 1.2, respectively) in 2019. Geographic variance in incidence rates and trends were observed for all three H. pylori-related malignancies. The geographic disparities were more pronounced for non-cardia GC, with the most rapid decline occurring in Hawaii (AAPC, -4.5% [95% CI, -5.5-3.6%]) and a constant trend in New York (AAPC 0.0% [95% CI, -0.4-0.4%]), the highest incidence in Alaska Natives, and the lowest incidence among Iowans (14.3 and 2.3, respectively). Conclusion The incidence of H. pylori-related cancer declined dramatically in the US between 2000 and 2019, with the exception of cardia GC. For young people, a rising trend in non-cardia GC was noted. Existence of racial/ethnic difference and geographic diversity persists. More cost-effective strategies of detection and management for H. pylori are still in demand.
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Affiliation(s)
- Yafang Lai
- Kunming Maternal and Child Health Service Centre, Kunming City Maternal and Child Health Hospital, Kunming, China
| | - Haoting Shi
- Department of Radiation Therapy, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zixin Wang
- School of Public Health, Weifang Medical University, Weifang, China
| | - Yibo Feng
- School of Public Health, Weifang Medical University, Weifang, China
| | - Yujia Bao
- School of Medicine, Hangzhou Normal University, Hangzhou, China
| | | | - Jinhui Li
- Department of Urology, Stanford University Medical Center, Stanford, CA, United States,*Correspondence: Jinhui Li
| | - Anhao Wu
- Department of Mammary Surgery I, The Third Affiliated Hospital of Kunming Medical University, Kunming, China,Anhao Wu
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Pezzino S, Sofia M, Faletra G, Mazzone C, Litrico G, La Greca G, Latteri S. Gut-Liver Axis and Non-Alcoholic Fatty Liver Disease: A Vicious Circle of Dysfunctions Orchestrated by the Gut Microbiome. BIOLOGY 2022; 11:1622. [PMID: 36358323 PMCID: PMC9687983 DOI: 10.3390/biology11111622] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 11/03/2022] [Accepted: 11/04/2022] [Indexed: 09/24/2023]
Abstract
Non-alcoholic fatty liver disease (NAFLD) is a prevalent, multifactorial, and poorly understood liver disease with an increasing incidence worldwide. NAFLD is typically asymptomatic and coupled with other symptoms of metabolic syndrome. The prevalence of NAFLD is rising in tandem with the prevalence of obesity. In the Western hemisphere, NAFLD is one of the most prevalent causes of liver disease and liver transplantation. Recent research suggests that gut microbiome dysbiosis may play a significant role in the pathogenesis of NAFLD by dysregulating the gut-liver axis. The so-called "gut-liver axis" refers to the communication and feedback loop between the digestive system and the liver. Several pathological mechanisms characterized the alteration of the gut-liver axis, such as the impairment of the gut barrier and the increase of the intestinal permeability which result in endotoxemia and inflammation, and changes in bile acid profiles and metabolite levels produced by the gut microbiome. This review will explore the role of gut-liver axis disruption, mediated by gut microbiome dysbiosis, on NAFLD development.
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Affiliation(s)
| | | | | | | | | | | | - Saverio Latteri
- Department of Surgical Sciences and Advanced Technologies “G. F. Ingrassia”, Cannizzaro Hospital, University of Catania, 95126 Catania, Italy
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Song MY, Lee DY, Han YM, Kim EH. Anti-Inflammatory Effect of Korean Propolis on Helicobacter pylori-Infected Gastric Mucosal Injury Mice Model. Nutrients 2022; 14:nu14214644. [PMID: 36364906 PMCID: PMC9659254 DOI: 10.3390/nu14214644] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 10/28/2022] [Accepted: 10/29/2022] [Indexed: 11/06/2022] Open
Abstract
Propolis, a natural resinous substance obtained from a variety of buds and plants, has been reported to possess various biological functions. Several recent studies have demonstrated the inhibitory effects of propolis on the growth of Helicobacter pylori (H. pylori) in vitro; however, current research efforts on Korean propolis (KP) remain insufficient especially in vivo. Our study aims to investigate the anti-inflammatory effect and molecular mechanism of KP on mouse gastric mucosa during H. pylori infection. We examined an in vivo H. pylori-induced gastric mucosal injury mice model. We found that KP inhibited the growth of H. pylori and attenuated the expression of H. pylori virulence factors such as cytotoxin-associated gene A, encoding urease A subunit, surface antigen gene and neutrophil-activating protein A. Moreover, KP reduced both gross lesions and pathological scores in H. pylori-challenged mice. In addition, KP markedly restrained the production of pro-inflammatory cytokines and nitric oxide levels compared with an untreated H. pylori-infected group. In particular, we found that KP repressed the phosphorylation of IκBα and NF-κB p65 subunit, and subsequently suppressed their downstream target genes. Taken together, these findings demonstrate the beneficial effects of KP on inflammation through the inhibition of NF-κB signaling as well as inhibition of H. pylori growth in a mouse model infected with H. pylori. This suggests the potential application of KP as a natural supplement for patient’s suffering from gastric mucosal injury caused by H. pylori infection.
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Effect of Helicobacter pylori Infection on Macromineral and Trace Element Status-Systematic Review and Meta-Analysis. J Pediatr Gastroenterol Nutr 2022; 75:661-665. [PMID: 35815889 DOI: 10.1097/mpg.0000000000003559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVES To explore the effect of Helicobacter pylori (Hp ) infection on zinc, copper, calcium, magnesium, phosphorus, and iodine status in the pediatric population. METHODS A protocol was registered on PROSPERO. A literature search was conducted on Embase, PubMed MEDLINE, and Web of Science, from inception to September 2020, including all studies in English, Spanish, and Portuguese languages. Reference lists were manually searched. Primary studies describing at least one micronutrient status in Hp -positive and Hp -negative or control children were included. PRISMA recommendations were applied. Pooled mean differences (MDs) and 95% confidence intervals were estimated using a random-effects model. A total of 1011 citations were screened. Six cross- sectional studies were included. No publications regarding phosphorus and iodine were identified. RESULTS Included studies in meta-analyses comprised an overall age range of 4-18 years, with Hp positivity ranging between 29.5% and 72.3%. These meta-analyses demonstrated a lack of evidence of an association between Hp -positive and Hp -negative or control children regarding serum zinc (vs Hp -negative: MD -1.36 µg/dL; vs control: MD 326.22 µg/dL), copper (MD -0.83 µg/dL), and calcium (MD 0.09 mg/dL) status. Considerable heterogeneity was recognized, except for calcium analysis (I 2 = 0%). Meta-analysis for magnesium was not performed. Five studies presented a low risk of bias. CONCLUSIONS The study demonstrated a lack of evidence of an effect of Hp infection on serum zinc, copper, and calcium status. Studies concerning magnesium, phosphorus, and iodine status are warranted. Furthermore, larger and well-controlled studies are recommended.
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Santiago MB, Leandro LF, Rosa RB, Silva MV, Teixeira SC, Servato JPS, Ambrósio SR, Veneziani RCS, Aldana-Mejía JA, Bastos JK, Martins CHG. Brazilian Red Propolis Presents Promising Anti- H. pylori Activity in In Vitro and In Vivo Assays with the Ability to Modulate the Immune Response. Molecules 2022; 27:7310. [PMID: 36364137 PMCID: PMC9658018 DOI: 10.3390/molecules27217310] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 10/17/2022] [Accepted: 10/20/2022] [Indexed: 10/01/2023] Open
Abstract
Helicobacter pylori is a Gram-negative, microaerophilic, curved-rod, flagellated bacterium commonly found in the stomach mucosa and associated with different gastrointestinal diseases. With high levels of prevalence worldwide, it has developed resistance to the antibiotics used in its therapy. Brazilian red propolis has been studied due to its biological properties, and in the literature, it has shown promising antibacterial activities. The aim of this study was to evaluate anti-H. pylori from the crude hydroalcoholic extract of Brazilian red propolis (CHEBRP). For this, in vitro determination of the minimum inhibitory and bactericidal concentration (MIC/MBC) and synergistic activity and in vivo, microbiological, and histopathological analyses using Wistar rats were carried out using CHEBRP against H. pylori strains (ATCC 46523 and clinical isolate). CHEBRP presented MIC/MBC of 50 and 100 μg/mL against H. pylori strains (ATCC 43526 and clinical isolate, respectively) and tetracycline MIC/MBC of 0.74 µg/mL. The association of CHEBRP with tetracycline had an indifferent effect. In the stomach mucosa of rats, all treatments performed significantly decreased the number of H. pylori, and a concentration of 300 mg/kg was able to modulate the inflammatory response in the tissue. Therefore, CHEBRP showed promising anti-H. pylori in in vitro and in vivo assays.
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Affiliation(s)
- Mariana B. Santiago
- Laboratory of Antimicrobial Testing, Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia 38405318, MG, Brazil
| | - Luis Fernando Leandro
- Laboratory of Antimicrobial Testing, Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia 38405318, MG, Brazil
| | - Rafael B. Rosa
- Complex of Animal Facilities, Federal University of Uberlândia, Uberlândia 38405315, MG, Brazil
| | - Murilo V. Silva
- Complex of Animal Facilities, Federal University of Uberlândia, Uberlândia 38405315, MG, Brazil
| | - Samuel C. Teixeira
- Laboratory of Antimicrobial Testing, Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia 38405318, MG, Brazil
| | | | - Sérgio Ricardo Ambrósio
- Nucleus of Research in Sciences and Technolog, University of Franca, Franca 14404600, SP, Brazil
| | | | - Jennyfer A. Aldana-Mejía
- Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14040900, SP, Brazil
| | - Jairo K. Bastos
- Faculty of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto 14040900, SP, Brazil
| | - Carlos Henrique G. Martins
- Laboratory of Antimicrobial Testing, Institute of Biomedical Sciences, Federal University of Uberlândia, Uberlândia 38405318, MG, Brazil
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Teng KW, Hsieh KS, Hung JS, Wang CJ, Liao EC, Chen PC, Lin YH, Wu DC, Lin CH, Wang WC, Chan HL, Huang SK, Kao MC. Helicobacter pylori employs a general protein glycosylation system for the modification of outer membrane adhesins. Gut Microbes 2022; 14:2130650. [PMID: 36206406 PMCID: PMC9553153 DOI: 10.1080/19490976.2022.2130650] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Helicobacter pylori infection is associated with the development of several gastric diseases including gastric cancer. To reach a long-term colonization in the host stomach, H. pylori employs multiple outer membrane adhesins for binding to the gastric mucosa. However, due to the redundancy of adhesins that complement the adhesive function of bacteria, targeting each individual adhesin alone usually achieves nonideal outcomes for preventing bacterial adhesion. Here, we report that key adhesins AlpA/B and BabA/B in H. pylori are modified by glycans and display a two-step molecular weight upshift pattern from the cytoplasm to the inner membrane and from the inner membrane to the outer membrane. Nevertheless, this upshift pattern is missing when the expression of some enzymes related to lipopolysaccharide (LPS) biosynthesis, including the LPS O-antigen assembly and ligation enzymes WecA, Wzk, and WaaL, is disrupted, indicating that the underlying mechanisms and the involved enzymes for the adhesin glycosylation are partially shared with the LPS biosynthesis. Loss of the adhesin glycosylation not only reduces the protease resistance and the stability of the tested adhesins but also changes the adhesin-binding ability. In addition, mutations in the LPS biosynthesis cause a significant reduction in bacterial adhesion in the in vitro cell-line model. The current findings reveal that H. pylori employs a general protein glycosylation system related to LPS biosynthesis for adhesin modification and its biological significance. The enzymes required for adhesin glycosylation rather than the adhesins themselves are potentially better drug targets for preventing or treating H. pylori infection.
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Affiliation(s)
- Kai-Wen Teng
- Institute of Molecular Medicine, College of Life Science, National Tsing Hua University, Hsinchu, Taiwan
| | - Kai-Siang Hsieh
- Institute of Molecular Medicine, College of Life Science, National Tsing Hua University, Hsinchu, Taiwan
| | - Ji-Shiuan Hung
- Institute of Molecular Medicine, College of Life Science, National Tsing Hua University, Hsinchu, Taiwan
| | - Chun-Jen Wang
- Institute of Molecular Medicine, College of Life Science, National Tsing Hua University, Hsinchu, Taiwan
| | - En-Chi Liao
- Institute of Bioinformatics and Structural Biology, College of Life Science, National Tsing Hua University, Hsinchu, Taiwan,Department of Medical Science, College of Life Science, National Tsing Hua University, Hsinchu, Taiwan
| | - Pei-Chun Chen
- Institute of Molecular Medicine, College of Life Science, National Tsing Hua University, Hsinchu, Taiwan
| | - Ying-Hsuan Lin
- Institute of Molecular Medicine, College of Life Science, National Tsing Hua University, Hsinchu, Taiwan
| | - Deng-Chyang Wu
- Division of Gastroenterology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chun-Hung Lin
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Wen-Ching Wang
- Institute of Molecular and Cellular Biology, College of Life Science, National Tsing Hua University, Hsinchu, Taiwan,Department of Life Science, College of Life Science, National Tsing Hua University, Hsinchu, Taiwan
| | - Hong-Lin Chan
- Institute of Bioinformatics and Structural Biology, College of Life Science, National Tsing Hua University, Hsinchu, Taiwan,Department of Medical Science, College of Life Science, National Tsing Hua University, Hsinchu, Taiwan
| | - Shau-Ku Huang
- National Institute of Environmental Health Sciences, National Health Research Institutes, Zhunan, Taiwan
| | - Mou-Chieh Kao
- Institute of Molecular Medicine, College of Life Science, National Tsing Hua University, Hsinchu, Taiwan,Department of Life Science, College of Life Science, National Tsing Hua University, Hsinchu, Taiwan,CONTACT Mou-Chieh Kao Institute of Molecular Medicine, College of Life Science, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu 300044, Taiwan
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Management of H. pylori Induced Peptic ulcer – A Phytotherapeutic Approach. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2022. [DOI: 10.22207/jpam.16.3.36] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A peptic ulcer is a chronic infectious disease that creates erosion on the epithelial lining of the stomach. It is a commonly encountered problem in the gastrointestinal tract (GI tract). Patients failed multiple regimens due to resistant H. pylori infection. H. pylori show maximum resistance towards Clarithromycin. Due to the consistent increase in resistance there is urgent need for the development of new drugs. Paying much for the antibiotic treatment one should go for the natural treatments with no side effects. Modern treatment of peptic ulcers emphasizes diet with routinely recommend hospitalization of several weeks. Currently, a lot of medications are coming out of natural products. The phytotherapeutic approach for the resistant H.pylori treatment is assessed. The plant produces many secondary metabolic substances which have a lot of beneficial roles in maintaining human health. Administration of plant products would prevent disease and able to eradicate resistant H.pylori. This review includes many phytoproducts having a wide range of antimicrobial activity. Reviewed phytoproducts includes Phytoceutical, Caffeic acid, phenethyl ester, Flavonoid, Capsaicin, Carotenoid, etc are effective treatment against H.pylori. To see their effect on the resistant H.pylori and to manage this resistant bacteria with an application of plant products is the prime concern of this review. The linkage between phytochemical and peptic ulcers will provide a novel framework for the future.
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de Wit S, Glen C, de Boer RA, Lang NN. Mechanisms shared between cancer, heart failure, and targeted anti-cancer therapies. Cardiovasc Res 2022; 118:3451-3466. [PMID: 36004495 PMCID: PMC9897696 DOI: 10.1093/cvr/cvac132] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 07/12/2022] [Accepted: 07/26/2022] [Indexed: 02/07/2023] Open
Abstract
Heart failure (HF) and cancer are the leading causes of death worldwide and accumulating evidence demonstrates that HF and cancer affect one another in a bidirectional way. Patients with HF are at increased risk for developing cancer, and HF is associated with accelerated tumour growth. The presence of malignancy may induce systemic metabolic, inflammatory, and microbial alterations resulting in impaired cardiac function. In addition to pathophysiologic mechanisms that are shared between cancer and HF, overlaps also exist between pathways required for normal cardiac physiology and for tumour growth. Therefore, these overlaps may also explain the increased risk for cardiotoxicity and HF as a result of targeted anti-cancer therapies. This review provides an overview of mechanisms involved in the bidirectional connection between HF and cancer, specifically focusing upon current 'hot-topics' in these shared mechanisms. It subsequently describes targeted anti-cancer therapies with cardiotoxic potential as a result of overlap between their anti-cancer targets and pathways required for normal cardiac function.
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Affiliation(s)
- Sanne de Wit
- Department of Cardiology, University Medical Centre Groningen, University of Groningen, PO Box 30.001, Hanzeplein 1, 9700 RB, Groningen, The Netherlands
| | - Claire Glen
- Institute of Cardiovascular and Medical Sciences, University of Glasgow, 126 University Place, Glasgow G12 8TA, United Kingdom
| | - Rudolf A de Boer
- Department of Cardiology, University Medical Centre Groningen, University of Groningen, PO Box 30.001, Hanzeplein 1, 9700 RB, Groningen, The Netherlands
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Zhu W, Wang JZ, Liu Z, Wei JF. The bacteria inside human cancer cells: Mainly as cancer promoters. Front Oncol 2022; 12:897330. [PMID: 36033476 PMCID: PMC9411745 DOI: 10.3389/fonc.2022.897330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 07/14/2022] [Indexed: 11/24/2022] Open
Abstract
The roles of the microbiome in human beings have become clearer with the development of next-generation sequencing techniques. Several pieces of evidence showed strong correlations between the microbiome and human health and disease, such as metabolic disorders, infectious diseases, digestive system diseases, and cancers. Among these diverse microbiomes, the role of bacteria in human cancers, especially in cancer cells, has received extensive attention. Latest studies found that bacteria widely existed in cancers, mainly in cancer cells and immune cells. In this review, we summarize the latest advances in understanding the role of bacteria in human cancer cells. We also discuss how bacteria are transported into cancer cells and their physiological significance in cancer progression. Finally, we present the prospect of bacterial therapy in cancer treatment.
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Affiliation(s)
- Wei Zhu
- Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, The Affiliated Cancer Hospital of Nanjing Medical University, Nanjing, China
- Research Division of Clinical Pharmacology, the First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jing-Zi Wang
- Department of Urology, Children’s Hospital of Nanjing Medical University, Nanjing, China
| | - Zhixian Liu
- Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, The Affiliated Cancer Hospital of Nanjing Medical University, Nanjing, China
- *Correspondence: Zhixian Liu, ; Ji-Fu Wei,
| | - Ji-Fu Wei
- Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, The Affiliated Cancer Hospital of Nanjing Medical University, Nanjing, China
- *Correspondence: Zhixian Liu, ; Ji-Fu Wei,
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Helicobacter pylori Thioredoxin1 May Play a Highly Pathogenic Role via the IL6/STAT3 Pathway. Gastroenterol Res Pract 2022; 2022:3175935. [PMID: 35958524 PMCID: PMC9359846 DOI: 10.1155/2022/3175935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 06/27/2022] [Accepted: 07/06/2022] [Indexed: 01/10/2023] Open
Abstract
Background Recent studies have shown that CagA is considered highly pathogenic to helicobacter pylori (HP) in Western populations. However, in East Asia, CagA positive HP can be up to 90%, but not all patients will lead to gastric cancer. Our research group has found that HP thioredoxin1 (Trx1) may be a marker of high pathogenicity. Here, we investigate whether HP Trx1 exerts high pathogenicity and its internal molecular mechanism. Materials and Methods We constructed the coculture system of high-Trx1 HP and low-Trx1 HP strains with gastric epithelial cell lines separately and detected the influence of HP strains. The cells were stained by AM/PI, and the cell's mortality was assessed by fluorescence microscope. The cell's supernatants or precipitates were collected to detect the expression of IL6. In addition, the cell's precipitates were collected, and the expression of p-STAT3 was detected by western blot. Furthermore, the cell's supernatants were collected for detecting the expression of 8-OHDG to investigate the extent of DNA damage. Results The high-Trx1 HP can cause higher mortality of GES-1 cells compared with the low-Trx1 HP group (high-Trx1 HP (4.53 ± 0.56) %, low-Trx1 HP (0.39 ± 0.10) %, P < 0.001). The mRNA and protein level of IL-6 in AGS and GES-1 cells were increased during HP infection, and the expression of IL-6 in the High-Trx1 HP group was much higher than the low-Trx1 HP group. Besides, the expression of p-STAT3 was higher in the HP-positive gastric mucosa. And the expression of p-STAT3 in the high-Trx1 HP group was significantly upregulated compared with the low-Trx1 HP group. Furthermore, the expression of 8-OHDG in the high-Trx1 group was much higher than the low-Trx1 group (high-Trx1 HP (5.47 ± 1.73) ng/ml, low-Trx1 HP (2.89 ± 1.72) ng/ml, P < 0.05). Conclusion HP Trx1 may play as a marker of high pathogenicity, and the high-Trx1 HP could mediate the pathogenic process of HP infection via the IL6/STAT3 pathway.
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Tran V, Saad T, Tesfaye M, Walelign S, Wordofa M, Abera D, Desta K, Tsegaye A, Ay A, Taye B. Helicobacter pylori (H. pylori) risk factor analysis and prevalence prediction: a machine learning-based approach. BMC Infect Dis 2022; 22:655. [PMID: 35902812 PMCID: PMC9330977 DOI: 10.1186/s12879-022-07625-7] [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: 08/18/2021] [Accepted: 07/18/2022] [Indexed: 12/03/2022] Open
Abstract
Background Although previous epidemiological studies have examined the potential risk factors that increase the likelihood of acquiring Helicobacter pylori infections, most of these analyses have utilized conventional statistical models, including logistic regression, and have not benefited from advanced machine learning techniques. Objective We examined H. pylori infection risk factors among school children using machine learning algorithms to identify important risk factors as well as to determine whether machine learning can be used to predict H. pylori infection status. Methods We applied feature selection and classification algorithms to data from a school-based cross-sectional survey in Ethiopia. The data set included 954 school children with 27 sociodemographic and lifestyle variables. We conducted five runs of tenfold cross-validation on the data. We combined the results of these runs for each combination of feature selection (e.g., Information Gain) and classification (e.g., Support Vector Machines) algorithms. Results The XGBoost classifier had the highest accuracy in predicting H. pylori infection status with an accuracy of 77%—a 13% improvement from the baseline accuracy of guessing the most frequent class (64% of the samples were H. Pylori negative.) K-Nearest Neighbors showed the worst performance across all classifiers. A similar performance was observed using the F1-score and area under the receiver operating curve (AUROC) classifier evaluation metrics. Among all features, place of residence (with urban residence increasing risk) was the most common risk factor for H. pylori infection, regardless of the feature selection method choice. Additionally, our machine learning algorithms identified other important risk factors for H. pylori infection, such as; electricity usage in the home, toilet type, and waste disposal location. Using a 75% cutoff for robustness, machine learning identified five of the eight significant features found by traditional multivariate logistic regression. However, when a lower robustness threshold is used, machine learning approaches identified more H. pylori risk factors than multivariate logistic regression and suggested risk factors not detected by logistic regression. Conclusion This study provides evidence that machine learning approaches are positioned to uncover H. pylori infection risk factors and predict H. pylori infection status. These approaches identify similar risk factors and predict infection with comparable accuracy to logistic regression, thus they could be used as an alternative method. Supplementary Information The online version contains supplementary material available at 10.1186/s12879-022-07625-7.
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Affiliation(s)
- Van Tran
- Department of Mathematics, Colgate University, 13 Oak Dr., Hamilton, NY, USA
| | - Tazmilur Saad
- Department of Mathematics, Colgate University, 13 Oak Dr., Hamilton, NY, USA
| | - Mehret Tesfaye
- College of Health Sciences, Department of Medical Laboratory Science, Addis Ababa University, Addis Ababa, Ethiopia
| | - Sosina Walelign
- College of Health Sciences, Department of Medical Laboratory Science, Addis Ababa University, Addis Ababa, Ethiopia
| | - Moges Wordofa
- College of Health Sciences, Department of Medical Laboratory Science, Addis Ababa University, Addis Ababa, Ethiopia
| | - Dessie Abera
- College of Health Sciences, Department of Medical Laboratory Science, Addis Ababa University, Addis Ababa, Ethiopia
| | - Kassu Desta
- College of Health Sciences, Department of Medical Laboratory Science, Addis Ababa University, Addis Ababa, Ethiopia
| | - Aster Tsegaye
- College of Health Sciences, Department of Medical Laboratory Science, Addis Ababa University, Addis Ababa, Ethiopia
| | - Ahmet Ay
- Department of Mathematics, Colgate University, 13 Oak Dr., Hamilton, NY, USA. .,Department of Biology, Colgate University, 13 Oak Dr., Hamilton, NY, USA.
| | - Bineyam Taye
- Department of Biology, Colgate University, 13 Oak Dr., Hamilton, NY, USA.
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Loh JT, Shuman JHB, Lin AS, Favret N, Piazuelo MB, Mallal S, Chopra A, McClain MS, Cover TL. Positive Selection of Mutations in the Helicobacter pylori katA 5' Untranslated Region in a Mongolian Gerbil Model of Gastric Disease. Infect Immun 2022; 90:e0000422. [PMID: 35652648 PMCID: PMC9302185 DOI: 10.1128/iai.00004-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Accepted: 05/11/2022] [Indexed: 01/18/2023] Open
Abstract
To evaluate potential effects of gastric inflammation on Helicobacter pylori diversification and evolution within the stomach, we experimentally infected Mongolian gerbils with an H. pylori strain in which Cag type IV secretion system (T4SS) activity is controlled by a TetR/tetO system. Gerbils infected with H. pylori under conditions in which Cag T4SS activity was derepressed had significantly higher levels of gastric inflammation than gerbils infected under conditions with repressed Cag T4SS activity. Mutations in the 5' untranslated region (UTR) of katA (encoding catalase) were detected in strains cultured from 8 of the 17 gerbils infected with Cag T4SS-active H. pylori and none of the strains from 17 gerbils infected with Cag T4SS-inactive H. pylori. Catalase enzymatic activity, steady-state katA transcript levels, and katA transcript stability were increased in strains with these single nucleotide polymorphisms (SNPs) compared to strains in which these SNPs were absent. Moreover, strains harboring these SNPs exhibited increased resistance to bactericidal effects of hydrogen peroxide, compared to control strains. Experimental introduction of the SNPs into the wild-type katA 5' UTR resulted in increased katA transcript stability, increased katA steady-state levels, and increased catalase enzymatic activity. Based on site-directed mutagenesis and modeling of RNA structure, increased katA transcript levels were correlated with higher predicted thermal stability of the katA 5' UTR secondary structure. These data suggest that high levels of gastric inflammation positively select for H. pylori strains producing increased levels of catalase, which may confer survival advantages to the bacteria in an inflammatory gastric environment.
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Affiliation(s)
- John T. Loh
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Jennifer H. B. Shuman
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Aung Soe Lin
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Natalie Favret
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - M. Blanca Piazuelo
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Simon Mallal
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
- Institute for Immunology and Infectious Diseases, Murdoch University, Murdoch, Australia
| | - Abha Chopra
- Institute for Immunology and Infectious Diseases, Murdoch University, Murdoch, Australia
| | - Mark S. McClain
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
- Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, Tennesse, USA
| | - Timothy L. Cover
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Vanderbilt Institute for Infection, Immunology, and Inflammation, Vanderbilt University Medical Center, Nashville, Tennesse, USA
- Veterans Affairs Tennessee Valley Healthcare System, Nashville, Tennessee, USA
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Wang T, Ye Y, Ji J, Zhang S, Yang X, Xu J, Wang JS, Chen Z, Xia B, Shen H, Xia R, Shi W, Sun X. Astilbin from Smilax glabra Roxb. alleviates high-fat diet-induced metabolic dysfunction. Food Funct 2022; 13:5023-5036. [PMID: 35388843 DOI: 10.1039/d2fo00060a] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Overweight, obesity, and related diseases are currently the major public health problems worldwide. Astilbin, extracted from the rhizome of Smilax glabra Roxb., is known to have significant anti-inflammatory activity and hepatoprotective effect. Studies have shown that it can inhibit adipogenesis in adipocytes in vitro; however, the intervention benefits of astilbin against obesity and related diseases along with its associated mechanisms remain unknown. This study aimed to demonstrate the impact of astilbin consumption on the overall biochemical pattern of high-fat diet (HFD) mice by using a combined multi-omics approach. Our data indicated that astilbin reduced body weight, insulin resistance, and inflammation in mice fed an HFD. Astilbin improved HFD-induced gut microbial dysbiosis by decreasing the Firmicutes-to-Bacteroidetes ratio, by increasing beneficial bacteria such as Alistipes and Muribaculum and decreasing harmful bacteria including Lachnospiraceae FCS020 group, Coriobacteriaceae UCG-002, and Lachnospiraceae UCG-008, resulting in enhanced intestinal carbohydrate and lipid metabolism. Meanwhile, astilbin protected the integrity of the intestinal barrier in HFD mice, increased short-chain fatty acid levels, and reduced metabolic endotoxemia. We further showed that astilbin attenuated hepatic lipid droplet aggregation and triglyceride accumulation in HFD mice, affected glutamate metabolism-related pathways, and enhanced hepatic ATP transduction pathways and attenuated xanthine metabolism pathways in mice, which were positively correlated with the abundance of Alistipes and negatively correlated with Ruminococcaceae UCG-003. The results highlighted that astilbin could be used as a prebiotic for the prevention of "gut-liver axis" damage and metabolic disruption in obese individuals.
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Affiliation(s)
- Tingwei Wang
- School of Food Science, State Key Laboratory of Food Science and Technology, National Engineering Research Center for Functional Foods, School of Food Science Synergetic Innovation Center of Food Safety and Nutrition, Joint International Research Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu 214122, China.
| | - Yongli Ye
- School of Food Science, State Key Laboratory of Food Science and Technology, National Engineering Research Center for Functional Foods, School of Food Science Synergetic Innovation Center of Food Safety and Nutrition, Joint International Research Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu 214122, China.
| | - Jian Ji
- School of Food Science, State Key Laboratory of Food Science and Technology, National Engineering Research Center for Functional Foods, School of Food Science Synergetic Innovation Center of Food Safety and Nutrition, Joint International Research Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu 214122, China.
| | - Shuang Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan Analysis and Testing Center, Jiangnan University, Wuxi, Jiangsu 999078, China
| | - Xingxing Yang
- School of Food Science, State Key Laboratory of Food Science and Technology, National Engineering Research Center for Functional Foods, School of Food Science Synergetic Innovation Center of Food Safety and Nutrition, Joint International Research Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu 214122, China.
| | - Jiayuan Xu
- School of Food Science, State Key Laboratory of Food Science and Technology, National Engineering Research Center for Functional Foods, School of Food Science Synergetic Innovation Center of Food Safety and Nutrition, Joint International Research Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu 214122, China.
| | - Jia-Sheng Wang
- Department of Environmental Health Science, College of Public Health, University of Georgia, Athens, GA, USA
| | - Zhiyuan Chen
- College of Chinese Medicine, Macau University of Science and Technology, Macau, 999078, China
| | - Bangen Xia
- Ningbo Xiabang New Pharmaceutical Technology Co., Ltd, Ningbo, Zhejiang, 315000, China
| | - Hongfang Shen
- Ningbo Xiabang New Pharmaceutical Technology Co., Ltd, Ningbo, Zhejiang, 315000, China
| | - Ruowei Xia
- Ningbo Xiabang New Pharmaceutical Technology Co., Ltd, Ningbo, Zhejiang, 315000, China
| | - Wenqin Shi
- Ningbo Xiabang New Pharmaceutical Technology Co., Ltd, Ningbo, Zhejiang, 315000, China
| | - Xiulan Sun
- School of Food Science, State Key Laboratory of Food Science and Technology, National Engineering Research Center for Functional Foods, School of Food Science Synergetic Innovation Center of Food Safety and Nutrition, Joint International Research Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu 214122, China.
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Tanous O, Levin C, Suchdev PS, Luo H, Rinawi F. Resolution of iron deficiency following successful eradication of Helicobacter pylori in children. Acta Paediatr 2022; 111:1075-1082. [PMID: 35028968 DOI: 10.1111/apa.16255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 01/12/2022] [Accepted: 01/12/2022] [Indexed: 12/26/2022]
Abstract
AIM To assess correlation between successful Helicobacter pylori (HP) eradication and resolution of iron deficiency in children, without iron supplementation. METHODS Medical records of children diagnosed with HP infection based on endoscopy were retrospectively reviewed. Among those with non-anaemic iron deficiency (NAID) or iron deficiency anaemia (IDA), haemoglobin, ferritin and CRP levels were compared prior and 6-9 months' post-successful HP eradication. Predictors of resolution of iron deficiency following HP eradication were assessed. RESULTS Among 60 included children (median age 14.8, IQR12.3-16 years; 62% males), 35% had IDA while the remaining 65% had NAID. Following successful HP eradication, iron normalised in 60% of patients with iron deficiency (ID), without iron supplementation. There were significant improvements in haemoglobin and ferritin concentrations following HP eradication with haemoglobin increasing from 12.3 g/dL to 13.0 g/dL and ferritin increasing from 6.3 μg/L to 15.1 μg/L (p < 0.001). In multiple logistic regression, older age was the only factor associated with resolution of anaemia following HP eradication (OR 1.65, 95% CI 1.16-2.35, p = 0.005). CONCLUSION Successful HP eradication could be helpful in improving iron status among children with refractory NAID or IDA. Older age may predict this outcome. Screening for HP might be considered in the workup of refractory IDA or ID.
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Affiliation(s)
- Osama Tanous
- Rollins School of Public Health, Emory University, Atlanta, Georgia, USA
- The Ruth and Bruce Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel
| | - Carina Levin
- The Ruth and Bruce Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel
- Pediatric Hematology Unit, Emek Medical Centre, Afula, Israel
| | - Parminder S Suchdev
- Rollins School of Public Health, Emory University, Atlanta, Georgia, USA
- Department of Pediatrics, Emory Global Health Institute, Atlanta, Georgia, USA
| | - Hanqi Luo
- Rollins School of Public Health, Emory University, Atlanta, Georgia, USA
| | - Firas Rinawi
- The Ruth and Bruce Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, Haifa, Israel
- Pediatric Gastroenterology Unit, Emek Medical Center, Afula, Israel
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Basu A, Singh R, Gupta S. Bacterial infections in cancer: A bilateral relationship. WILEY INTERDISCIPLINARY REVIEWS. NANOMEDICINE AND NANOBIOTECHNOLOGY 2022; 14:e1771. [PMID: 34994112 DOI: 10.1002/wnan.1771] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 10/09/2021] [Accepted: 11/12/2021] [Indexed: 12/15/2022]
Abstract
Bacteria share a long commensal relationship with the human body. New findings, however, continue to unravel many complexities associated with this old alliance. In the past decades, the dysbiosis of human microbiome has been linked to tumorigenesis, and more recently to spontaneous colonization of existing tumors. The topic, however, remains open for debate as the claims for causative-prevailing dual characteristics of bacteria are mostly based on epidemiological evidence rather than robust mechanistic models. There are also no reviews linking the collective impact of bacteria in tumor microenvironments to the efficacy of cancer drugs, mechanisms of pathogen-initiated cancer and bacterial colonization, personalized nanomedicine, nanotechnology, and antimicrobial resistance. In this review, we provide a holistic overview of the bilateral relationship between cancer and bacteria covering all these aspects. Our collated evidence from the literature does not merely categorize bacteria as cancer causative or prevailing agents, but also critically highlights the gaps in the literature where more detailed studies may be required to reach such a conclusion. Arguments are made in favor of dual drug therapies that can simultaneously co-target bacteria and cancer cells to overcome drug resistance. Also discussed are the opportunities for leveraging the natural colonization and remission power of bacteria for cancer treatment. This article is categorized under: Therapeutic Approaches and Drug Discovery > Nanomedicine for Infectious Disease Nanotechnology Approaches to Biology > Nanoscale Systems in Biology Therapeutic Approaches and Drug Discovery > Emerging Technologies.
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Affiliation(s)
- Abhirup Basu
- Department of Chemical Engineering, Indian Institute of Technology, Delhi, India
| | - Rohini Singh
- Department of Chemical Engineering, Indian Institute of Technology, Delhi, India
| | - Shalini Gupta
- Department of Chemical Engineering, Indian Institute of Technology, Delhi, India
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50
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Xu M, Zhou J, Heng D, Su X, Onakpa MM, Bai Y, Duan JA, Che CT, Bi H, Zhao M. Quinone Derivatives as Promising Anti- Helicobacter pylori Agents from Aerial Parts of Mitracarpus hirtus. JOURNAL OF NATURAL PRODUCTS 2022; 85:1029-1038. [PMID: 35412828 DOI: 10.1021/acs.jnatprod.1c01163] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Seven new naphthoquinone diglycosides (1-7), three new anthraquinones (8-10), and eight known analogues were obtained from the aerial parts of Mitracarpus hirtus collected from West Africa in a bioassay-guided phytochemical investigation. All isolated compounds were elucidated by comparison with the literature and interpretation of spectroscopic data, and the absolute configurations of the new naphthoquinone diglycosides (1-10) were confirmed by chemical methods and ECD calculations. Notably, compound 1 was found to be the first naphthoquinone diglycoside containing carboxylic acid and isopentenyl side chains isolated from a species in the genus Mitracarpus. Compounds 6-18 showed antibacterial activity against multiple Helicobacter pylori strains with MIC values ranging from 0.0625 to 64 μg/mL. Particularly, 1-hydroxybenzoisochromanquinone (17) and benzo[g]isoquinoline-5,10-dione (18), with MIC values of 0.0625 and 0.125 μg/mL, displayed 32-512-fold higher potencies than a positive control, metronidazole. Compound 18 also demonstrated high antibiofilm activity and killed biofilm-encased Helicobacter pylori cells more effectively than metronidazole.
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Affiliation(s)
- Mingming Xu
- Jiangsu Collaborative Innovation Centre of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, People's Republic of China
| | - Junfei Zhou
- Jiangsu Collaborative Innovation Centre of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, People's Republic of China
| | - Ding Heng
- Department of Pathogen Biology, Jiangsu Key Laboratory of Pathogen Biology, Helicobacter pylori Research Centre, Nanjing Medical University, Nanjing 211166, People's Republic of China
| | - Xiaorong Su
- Jiangsu Collaborative Innovation Centre of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, People's Republic of China
- Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210029, People's Republic of China
| | - Monday M Onakpa
- Department of Veterinary Pharmacology and Toxicology, University of Abuja, Abuja 920001, Nigeria
| | - Yuefan Bai
- Department of Pathogen Biology, Jiangsu Key Laboratory of Pathogen Biology, Helicobacter pylori Research Centre, Nanjing Medical University, Nanjing 211166, People's Republic of China
| | - Jin-Ao Duan
- Jiangsu Collaborative Innovation Centre of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, People's Republic of China
| | - Chun-Tao Che
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Hongkai Bi
- Department of Pathogen Biology, Jiangsu Key Laboratory of Pathogen Biology, Helicobacter pylori Research Centre, Nanjing Medical University, Nanjing 211166, People's Republic of China
| | - Ming Zhao
- Jiangsu Collaborative Innovation Centre of Chinese Medicinal Resources Industrialization, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, People's Republic of China
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, Illinois 60612, United States
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