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Qin C, Huang GR, Guan AX, Zhou WT, Chen H, Luo PP, Luo XK, Huang YQ, Huang ZS. Mechanistic research: Selenium regulates virulence factors, reducing adhesion ability and inflammatory damage of Helicobacter pylori. World J Gastroenterol 2024; 30:91-107. [PMID: 38293320 PMCID: PMC10823904 DOI: 10.3748/wjg.v30.i1.91] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 11/22/2023] [Accepted: 12/13/2023] [Indexed: 01/06/2024] Open
Abstract
BACKGROUND The pathogenicity of Helicobacter pylori is dependent on factors including the environment and the host. Although selenium is closely related to pathogenicity as an environmental factor, the specific correlation between them remains unclear. AIM To investigate how selenium acts on virulence factors and reduces their toxicity. METHODS H. pylori strains were induced by sodium selenite. The expression of cytotoxin-associated protein A (CagA) and vacuolating cytotoxin gene A (VacA) was determined by quantitative PCR and Western blotting. Transcriptomics was used to analyze CagA, CagM, CagE, Cag1, Cag3, and CagT. C57BL/6A mice were infected with the attenuated strains subjected to sodium selenite induction, and H. pylori colonization, inflammatory reactions, and the cell adhesion ability of H. pylori were assessed. RESULTS CagA and VacA expression was upregulated at first and then downregulated in the H. pylori strains after sodium selenite treatment. Their expression was significantly and steadily downregulated after the 5th cycle (10 d). Transcriptome analysis revealed that sodium selenite altered the levels affect H. pylori virulence factors such as CagA, CagM, CagE, Cag1, Cag3, and CagT. Of these factors, CagM and CagE expression was continuously downregulated and further downregulated after 2 h of induction with sodium selenite. Moreover, CagT expression was upregulated before the 3rd cycle (6 d) and significantly downregulated after the 5th cycle. Cag1 and Cag3 expression was upregulated and downregulated, respectively, but no significant change was observed by the 5th cycle. C57BL/6A mice were infected with the attenuated strains subjected to sodium selenite induction. The extent of H. pylori colonization in the stomach increased; however, sodium selenite also induced a mild inflammatory reaction in the gastric mucosa of H. pylori-infected mice, and the cell adhesion ability of H. pylori was significantly weakened. CONCLUSION These results demonstrate that H. pylori displayed virulence attenuation after the 10th d of sodium selenite treatment. Sodium selenite is a low toxicity compound with strong stability that can reduce the cell adhesion ability of H. pylori, thus mitigating the inflammatory damage to the gastric mucosa.
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Affiliation(s)
- Chun Qin
- Guangxi Technology Innovation Cooperation Base of Prevention and Control Pathogenic Microbes with Drug Resistance, Youjiang Medical University for Nationalities, Baise 533000, Guangxi Zhuang Autonomous Region, China
- Department of Digestive Diseases, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise 533000, Guangxi Zhuang Autonomous Region, China
| | - Gan-Rong Huang
- Guangxi Technology Innovation Cooperation Base of Prevention and Control Pathogenic Microbes with Drug Resistance, Youjiang Medical University for Nationalities, Baise 533000, Guangxi Zhuang Autonomous Region, China
- Key Laboratory of the Prevention and Treatment of Drug Resistant Microbial Infecting, Youjiang Medical University for Nationalities, Baise 533000, Guangxi Zhuang Autonomous Region, China
| | - Ai-Xing Guan
- Guangxi Technology Innovation Cooperation Base of Prevention and Control Pathogenic Microbes with Drug Resistance, Youjiang Medical University for Nationalities, Baise 533000, Guangxi Zhuang Autonomous Region, China
- Department of Digestive Diseases, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise 533000, Guangxi Zhuang Autonomous Region, China
| | - Wen-Ting Zhou
- Guangxi Technology Innovation Cooperation Base of Prevention and Control Pathogenic Microbes with Drug Resistance, Youjiang Medical University for Nationalities, Baise 533000, Guangxi Zhuang Autonomous Region, China
- Key Laboratory of the Prevention and Treatment of Drug Resistant Microbial Infecting, Youjiang Medical University for Nationalities, Baise 533000, Guangxi Zhuang Autonomous Region, China
| | - Hao Chen
- Department of Pathology, Wannan Medical College, Wuhu 241002, Anhui Province, China
| | - Pei-Pei Luo
- Department of Gastroenterology, Wujin People’s Hospital affiliated to Jiangsu University, Changzhou 213004, Jiangsu Province, China
| | - Xian-Ke Luo
- Department of Gastroenterology, Guangzhou Liwan District People's Hospital, Guangzhou 510370, Guangdong Province, China
| | - Yan-Qiang Huang
- Guangxi Technology Innovation Cooperation Base of Prevention and Control Pathogenic Microbes with Drug Resistance, Youjiang Medical University for Nationalities, Baise 533000, Guangxi Zhuang Autonomous Region, China
- Key Laboratory of the Prevention and Treatment of Drug Resistant Microbial Infecting, Youjiang Medical University for Nationalities, Baise 533000, Guangxi Zhuang Autonomous Region, China
| | - Zan-Song Huang
- Guangxi Technology Innovation Cooperation Base of Prevention and Control Pathogenic Microbes with Drug Resistance, Youjiang Medical University for Nationalities, Baise 533000, Guangxi Zhuang Autonomous Region, China
- Department of Digestive Diseases, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise 533000, Guangxi Zhuang Autonomous Region, China
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Aslan A, Karapinar HS, Kilicel F, Boyacıoğlu T, Pekin C, Toprak ŞS, Cihan M, Yilmaz BS. Trace element levels in serum and gastric mucosa in patients with Helicobacter pylori positive and negative gastritis. J Trace Elem Med Biol 2023; 75:127108. [PMID: 36435152 DOI: 10.1016/j.jtemb.2022.127108] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 10/26/2022] [Accepted: 11/16/2022] [Indexed: 11/23/2022]
Abstract
BACKGROUND Most trace elements are inhibited by Helicobacter pylori-infection, and variations in specific element levels are linked to the development of stomach cancer. This is the first study to show the relationship between serum and tissue concentrations of twenty-five trace elements and H. pylori infection status. This study purposed to define serum and tissue trace element levels of 25 healthy individuals with Helicobacter pylori-positive gastritis and Helicobacter pylori-negative gastritis and to reveal their relationship with the disease. METHODS Study groups consisted of sixty-two patients with Helicobacter pylori-positive, thirty-seven patients with Helicobacter pylori-negative, and thirty healthy individuals. Serum and tissue concentrations of twenty-five elements (aluminum, boron, arsenic, barium, calcium, beryllium, copper, cadmium, iron, chromium, mercury, lithium, potassium, magnesium, sodium, manganese, nickel, phosphorus, lead, scandium, strontium, selenium, tellurium, titanium, zinc) were defined by inductively coupled plasma optical emission spectrometry. RESULTS Except for copper, lithium, and strontium elements in serum samples, other trace elements differed significantly between the groups (p < 0.05). The serum chromium (p = 0.002), mercury (p = 0.001), boron (p < 0.001), and cadmium (p < 0.001) levels of H. pylori-negative gastritis and H. pylori-positive gastritis participants were significantly different, and their serum concentrations were less than 0.5 µ/l. Boron, barium, beryllium, chromium, lithium, phosphorus and strontium elements in tissue samples did not differ significantly between the groups (p > 0.05). Manganese, nickel, tellurium and titanium elements were not detected in tissue and serum samples. The mean concentrations of calcium, beryllium, chromium, iron, potassium, lithium, magnesium, scandium, and selenium were higher in the tissues of patients with H. pylori gastritis compared to healthy control tissues. Also, cadmium could not be detected in tissue samples. There was a significant difference between H. pylori-infected tissue and serum chromium levels (p = 0.001), with lower levels detected in tissue samples. CONCLUSION This is the first study that we are knowledgeable of that reports the concentrations of twenty five elements in both serum and tissue samples, as well as the relationship between trace elements and Helicobacter pylori-infection status. Dietary adjustment is indicated as an adjunct to medical therapy to stabilize trace elements because Helicobacter pylori bacteria cause inflammation and impair element absorption in gastritis patients. We also think that this study will shed light on studies on the relationship between Helicobacter pylori-trace elements and serum-tissue/healthy serum-tissue trace element levels of patients with Helicobacter pylori gastritis.
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Affiliation(s)
- Ahmet Aslan
- Department of General Surgery, Karamanoğlu Mehmetbey University, 70100 Karaman, Turkey
| | - Hacer Sibel Karapinar
- Scientific and Technological Research & Application Center, Karamanoğlu Mehmetbey University, 70100 Karaman, Turkey.
| | - Fevzi Kilicel
- Department of Chemistry, Karamanoğlu Mehmetbey University, 70100 Karaman, Turkey
| | - Tülin Boyacıoğlu
- Institute of Science, Department of Chemistry, Karamanoğlu Mehmetbey University, 70100 Karaman, Turkey
| | - Ceyhun Pekin
- Department of General Surgery, Karamanoğlu Mehmetbey University, 70100 Karaman, Turkey
| | - Şükrü Salih Toprak
- Department of General Surgery, Karamanoğlu Mehmetbey University, 70100 Karaman, Turkey
| | - Mehmethan Cihan
- Department of General Surgery, Karaman Training and Research Hospital, 70100 Karaman, Turkey
| | - Burcu Sanal Yilmaz
- Department of Medical Pathology, Karamanoğlu Mehmetbey University, 70100 Karaman, Turkey
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Duzgun Ergun D, Doganer F, Koc G, Soyocak A, Pastaci Ozsobaci N, Ergun S. The relationship of 50 bp deletion in the promoter region of SOD1 gene with viscosity and trace elements in chronic gastritis with Helicobacter Pylori: A case study. J Trace Elem Med Biol 2022; 73:127039. [PMID: 35868167 DOI: 10.1016/j.jtemb.2022.127039] [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: 11/12/2021] [Revised: 05/27/2022] [Accepted: 07/14/2022] [Indexed: 11/29/2022]
Abstract
The aim of research was to evaluate the superoxide dismutase-1 (SOD1) promoter region Insertion/Deletion (Ins/Del) gene variations in chronic gastritis patients infected with Helicobacter pylori (H. pylori), as well as the association between trace elements and viscosity. The study consisted 154 volunteer (18-65 age) with 107 H. pylori (+) and 47 (-). Biochemical parameters, whole blood viscosity (WBV), trace element levels and SOD1 promoter region Ins/Del gene variations were analyzed in blood samples provided from patients. It was determined that zinc (Zn), copper (Cu), iron (Fe) and magnesium (Mg) levels decreased whereas WBV, selenium (Se) and Cu/Zn ratio increased in H.pylori (+) chronic gastritis patients. The SOD1 50 bp Ins/Del gene polymorphism genotype and allele frequency distributions in H.pylori (+) and (-) chronic gastritis patients were not statistically significant. It was reported that Zn level decreased in H.pylori (+) patients with a deletion in at least one locus (Ins/Del+Del/Del), Se level increased. It has been found that the presence of H.pylori affects trace element metabolism and biochemical parameters in chronic gastritis patients. The 50 bp Ins/Del polymorphism in the promoter region of the SOD1 gene was shown to have no association with chronic gastritis. Investigation of different variants of the SOD1 gene in patients with gastritis will contribute to the determination of its role in the pathogenesis of the disease.
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Affiliation(s)
- D Duzgun Ergun
- Department of Biophysics, Faculty of Medicine, Istanbul Aydin University, Istanbul, Turkey.
| | - F Doganer
- Department of Biotechnology, Faculty of Arts and Science, Aksaray University, Aksaray, Turkey
| | - G Koc
- Department of Medical Biology, Faculty of Medicine, Istanbul Aydin University, Istanbul, Turkey
| | - A Soyocak
- Department of Medical Biology, Faculty of Medicine, Istanbul Aydin University, Istanbul, Turkey
| | - N Pastaci Ozsobaci
- Department of Biophysics, Cerrahpasa Medical Faculty, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - S Ergun
- Department of General Surgery, Cerrahpasa Medical Faculty, Istanbul University-Cerrahpasa, Istanbul, Turkey; Department of General Surgery, Istanbul Avcılar Murat Koluk State Hospital, Istanbul, Turkey
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Elsaghier AM, Abdel Aal FH, Abu Faddan NH, Farghaly HS, Hassan MAE, Sherif MF. Serum level of some micronutrients in children infected with Helicobacter pylori. EGYPTIAN PEDIATRIC ASSOCIATION GAZETTE 2020. [DOI: 10.1186/s43054-020-0017-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Helicobacter pylori (H. pylori) proved to be highly prevalent all over the world. H. pylori may modify the absorption of many nutrients. Studies have suggested that, beyond iron, H. pylori infection may affect the homeostasis of other micronutrients such as vitamins and trace elements. Our study’s aim was to assess the effect of H. pylori infection on some blood micronutrient level including zinc, selenium, vitamin C, and vitamin B12 in children with chronic or recurrent unexplained dyspeptic symptoms and/or non-variceal hematemesis.
Results
A cross-sectional case-control study was carried out in 32 children (4–18 years) with chronic or recurrent unexplained dyspeptic symptoms and/or non-variceal hematemesis. Patients were divided according to the results histopathology and rapid urease test into two groups, H. pylori-positive patients (18 patients) and H. pylori-negative patients (14 patients). Another control group of 18 children was included. Serum levels of zinc, selenium, vitamin C, and vitamin B12 were measured in all children. Prevalence of H. pylori infection was 56.2%. The mean serum zinc levels were significantly lower in H. pylori-positive cases than in control group (84.2 ± 13.85 versus 94.6 ± 6.52 with P = 0.009) and lower than in H. pylori-negative cases but not statistically significant (84.2 ± 13.85 versus 92.2 ± 8.53 with P = 0.054). The mean serum vitamin C levels were significantly lower in H. pylori-positive cases than in negative cases and control group (220.7 ± 46.16 versus 305.1 ± 28.83 and 313.1 ± 31.43 with P < 0.0001). The mean serum vitamin B12 levels were significantly lower in H. pylori-positive cases than in negative cases and control group (167.8 ± 76.98 versus 290.1 ± 69.92 and 326.1 ± 38.67 with P < 0.0001). The mean serum selenium level was slightly higher in H. pylori-positive patients than in H. pylori-negative patients and control group but not statistically significant (118.2 ± 11.13 versus 112.1 ± 8.69 and 113.1 ± 13.76 with P = 0.096, 0.243 respectively).
Conclusion
Helicobacter pylori infection in children has a significant negative effect on the serum levels of zinc, vitamin C, and vitamin B12.
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Gonciarz W, Lechowicz Ł, Urbaniak M, Kaca W, Chmiela M. Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (FTIR) and Artificial Neural Networks Applied to Investigate Quantitative Changes of Selected Soluble Biomarkers, Correlated with H. pylori Infection in Children and Presumable Consequent Delayed Growth. J Clin Med 2020; 9:jcm9123852. [PMID: 33260854 PMCID: PMC7759849 DOI: 10.3390/jcm9123852] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 11/22/2020] [Accepted: 11/24/2020] [Indexed: 12/24/2022] Open
Abstract
Helicobacter pylori infections causing gastroduodenal disorders are a common medical problem. The aim of this study was to determine the specific motives of infrared spectroscopy (IR) spectra of sera from H. pylori-infected and uninfected children applied to investigate quantitatively-selected soluble biomarkers correlated with H. pylori infection in children and presumable consequent delayed growth. Sera from 41 children infected with H. pylori (Hp(+)) and 43 uninfected (Hp(-)) under the care of the Polish Mother's Hospital in Lodz, Poland, were analyzed. The H. pylori status was confirmed by gastroscopy, 13C urea breath testing, and anti-H. pylori IgG antibodies. Infrared spectra were measured using an FTIR/FT-NIR Spectrum 400 spectrometer (PerkinElmer). The IR spectrum was measured in the wavenumber range 3000-750 cm-1 and subjected to mathematical calculation of the first derivative. Based on the chi-square test, 10 wavenumbers of spectra correlating with H. pylori infection were selected for use in designing an artificial neural network. Ten parts of the IR spectra correlating with H. pylori infection were identified in the W2 and W3 windows associated mainly with proteins and the W4 window related to nucleic acids and hydrocarbons. Artificial neural networks for H. pylori infection were developed based on chemometric data. By mathematical modeling, children were classified towards H. pylori infection in conjunction with elevated levels of selected biomarkers in serum potentially related to growth retardation. The study concludes that IR spectroscopy and artificial neural networks may help to confirm H. pylori-driven growth disorders in children.
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Affiliation(s)
- Weronika Gonciarz
- Department of Immunology and Infectious Biology, Institute of Microbiology, Biotechnology and Immunology, Faculty of Biology and Environmental Protection, University of Lodz, Banacha 12/16, 90-237 Łódź, Poland;
| | - Łukasz Lechowicz
- Institute of Biology, Faculty of Natural Sciences, Jan Kochanowski University, Uniwersytecka 7, 25-406 Kielce, Poland; (Ł.L.); (W.K.)
| | - Mariusz Urbaniak
- Institute of Chemistry, Faculty of Natural Sciences, Jan Kochanowski University, Uniwersytecka 7, 25-406 Kielce, Poland;
| | - Wiesław Kaca
- Institute of Biology, Faculty of Natural Sciences, Jan Kochanowski University, Uniwersytecka 7, 25-406 Kielce, Poland; (Ł.L.); (W.K.)
| | - Magdalena Chmiela
- Department of Immunology and Infectious Biology, Institute of Microbiology, Biotechnology and Immunology, Faculty of Biology and Environmental Protection, University of Lodz, Banacha 12/16, 90-237 Łódź, Poland;
- Correspondence:
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Qian F, Misra S, Prabhu KS. Selenium and selenoproteins in prostanoid metabolism and immunity. Crit Rev Biochem Mol Biol 2019; 54:484-516. [PMID: 31996052 PMCID: PMC7122104 DOI: 10.1080/10409238.2020.1717430] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 01/13/2020] [Accepted: 01/14/2020] [Indexed: 02/06/2023]
Abstract
Selenium (Se) is an essential trace element that functions in the form of the 21st amino acid, selenocysteine (Sec) in a defined set of proteins. Se deficiency is associated with pathological conditions in humans and animals, where incorporation of Sec into selenoproteins is reduced along with their expression and catalytic activity. Supplementation of Se-deficient population with Se has shown health benefits suggesting the importance of Se in physiology. An interesting paradigm to explain, in part, the health benefits of Se stems from the observations that selenoprotein-dependent modulation of inflammation and efficient resolution of inflammation relies on mechanisms involving a group of bioactive lipid mediators, prostanoids, which orchestrate a concerted action toward maintenance and restoration of homeostatic immune responses. Such an effect involves the interaction of various immune cells with these lipid mediators where cellular redox gatekeeper functions of selenoproteins further aid in not only dampening inflammation, but also initiating an effective and active resolution process. Here we have summarized the current literature on the multifaceted roles of Se/selenoproteins in the regulation of these bioactive lipid mediators and their immunomodulatory effects.
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Affiliation(s)
- Fenghua Qian
- Center for Molecular Immunology and Infectious Disease and Center for Molecular Toxicology and Carcinogenesis, Department of Veterinary and Biomedical Sciences and The Penn State Cancer Institute, The Pennsylvania State University, University Park, PA. 16802, USA
| | - Sougat Misra
- Center for Molecular Immunology and Infectious Disease and Center for Molecular Toxicology and Carcinogenesis, Department of Veterinary and Biomedical Sciences and The Penn State Cancer Institute, The Pennsylvania State University, University Park, PA. 16802, USA
| | - K. Sandeep Prabhu
- Center for Molecular Immunology and Infectious Disease and Center for Molecular Toxicology and Carcinogenesis, Department of Veterinary and Biomedical Sciences and The Penn State Cancer Institute, The Pennsylvania State University, University Park, PA. 16802, USA
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7
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Sumner SE, Markley RL, Kirimanjeswara GS. Role of Selenoproteins in Bacterial Pathogenesis. Biol Trace Elem Res 2019; 192:69-82. [PMID: 31489516 PMCID: PMC6801102 DOI: 10.1007/s12011-019-01877-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 08/19/2019] [Indexed: 12/11/2022]
Abstract
The trace element selenium is an essential micronutrient that plays an important role in maintaining homeostasis of several tissues including the immune system of mammals. The vast majority of the biological functions of selenium are mediated via selenoproteins, proteins which incorporate the selenium-containing amino acid selenocysteine. Several bacterial infections of humans and animals are associated with decreased levels of selenium in the blood and an adjunct therapy with selenium often leads to favorable outcomes. Many pathogenic bacteria are also capable of synthesizing selenocysteine suggesting that selenoproteins may have a role in bacterial physiology. Interestingly, the composition of host microbiota is also regulated by dietary selenium levels. Therefore, bacterial pathogens, microbiome, and host immune cells may be competing for a limited supply of selenium. Elucidating how selenium, in particular selenoproteins, may regulate pathogen virulence, microbiome diversity, and host immune response during a bacterial infection is critical for clinical management of infectious diseases.
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Affiliation(s)
- Sarah E Sumner
- Pathobiology Graduate Program, The Pennsylvania State University, University Park, PA, 16802, USA
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Rachel L Markley
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Girish S Kirimanjeswara
- Department of Veterinary and Biomedical Sciences, The Pennsylvania State University, University Park, PA, 16802, USA.
- Center for Molecular Immunology and Infectious Disease, The Pennsylvania State University, University Park, PA, 16802, USA.
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8
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Shu L, Zheng PF, Zhang XY, Feng YL. Dietary patterns and Helicobacter pylori infection in a group of Chinese adults ages between 45 and 59 years old: An observational study. Medicine (Baltimore) 2019; 98:e14113. [PMID: 30633225 PMCID: PMC6336658 DOI: 10.1097/md.0000000000014113] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Limited studies have reported the association between dietary patterns and the risk of Helicobacter pylori (H pylori) infection. The purpose of this study was to evaluate the relationship between dietary patterns and H pylori infection in a Chinese population ages from 45 to 59 years. We performed a cross-sectional examination of the associations between dietary patterns and H pylori infection in 3014 Chinese adults ages between 45 and 59 years from Hangzhou city, Zhejiang province, China. Dietary intake was assessed through a semi-quantitative food frequency questionnaire (FFQ). H pylori infection was diagnosed using the C-urea breath test. Multivariable logistic regression analyses were used to determine the associations between dietary patterns and the risk of H pylori infection. The prevalence of H pylori infection was 27.5%. Four major dietary patterns were identified by means of factor analysis: health-conscious, Western, grains-vegetables and high-salt patterns. After adjustment for the potential confounders, participants in the highest quartile of the "grains-vegetables" pattern scores had a lower odds ratio (OR) for H pylori infection (OR = 0.82; 95% confidence interval [CI]: 0.732-0.973; P = .04) than did those in the lowest quartile. Compared with those in the lowest quartile, participants in the highest quartile of the "high-salt" pattern scores had a greater OR for H pylori infection (OR = 1.13; 95%CI: 1.004-1.139; P = .048). Besides, no significant associations were found between the "health-conscious" and "Western" dietary patterns and the risk of H pylori infection.Our findings demonstrate that the "grains-vegetables" pattern is associated with a decreased risk, while "high-salt" pattern is associated with an increased risk of H pylori infection.
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Affiliation(s)
- Long Shu
- Department of Nutrition, Zhejiang Hospital
| | - Pei-Fen Zheng
- Department of Nutrition, Zhejiang Hospital
- Department of Digestion, Zhejiang Hospital, Xihu district, Hangzhou, Zhejiang, China
| | | | - Yu-Liang Feng
- Department of Digestion, Zhejiang Hospital, Xihu district, Hangzhou, Zhejiang, China
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Xia Y, Meng G, Zhang Q, Liu L, Wu H, Shi H, Bao X, Su Q, Gu Y, Fang L, Yu F, Yang H, Yu B, Sun S, Wang X, Zhou M, Jia Q, Zhao H, Song K, Niu K. Dietary Patterns are Associated with Helicobacter Pylori Infection in Chinese Adults: A Cross-Sectional Study. Sci Rep 2016; 6:32334. [PMID: 27573193 PMCID: PMC5004161 DOI: 10.1038/srep32334] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Accepted: 08/03/2016] [Indexed: 12/14/2022] Open
Abstract
Previous studies indicated that food consumption was associated with Helicobacter pylori infection, but no study has yet investigated the association between Helicobacter pylori infection and dietary patterns. The aim of this study was to evaluate the associations between Helicobacter pylori infection and dietary patterns in Tianjin, China. The final cross-sectional study population comprised 10407 participants. Dietary consumption of participants was assessed via food frequency questionnaire. Factor analysis was used to identify dietary patterns, and Helicobacter pylori infection status was diagnosis by H. pylori urease Immunogold Testing kit. Participants in the highest quartile of the high-carbohydrate/sweet pattern showed a multivariable-adjusted OR (95% CI) of 1.65 (1.27–2.17) for the prevalence of H. pylori infection compared with those in the lowest quartile. The multiple adjusted OR for scores of the extreme quartile of high-protein/cholesterol pattern was 0.75 (95% CI, 0.57–0.98). This study demonstrated that a diet rich in carbohydrates and sweets was positively associated with the prevalence of H. pylori infection; interestingly, a diet characterized by high intake of animal offal, animal blood, fish, seafood, and poultry was associated with a reduction of prevalence of H. pylori infection.
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Affiliation(s)
- Yang Xia
- Nutritional Epidemiology Institute and School of Public Health, Tianjin Medical University, Tianjin, China
| | - Ge Meng
- Nutritional Epidemiology Institute and School of Public Health, Tianjin Medical University, Tianjin, China
| | - Qing Zhang
- Health Management Centre, Tianjin Medical University General Hospital, Tianjin, China
| | - Li Liu
- Health Management Centre, Tianjin Medical University General Hospital, Tianjin, China
| | - Hongmei Wu
- Nutritional Epidemiology Institute and School of Public Health, Tianjin Medical University, Tianjin, China
| | - Hongbin Shi
- Health Management Centre, Tianjin Medical University General Hospital, Tianjin, China
| | - Xue Bao
- Nutritional Epidemiology Institute and School of Public Health, Tianjin Medical University, Tianjin, China
| | - Qian Su
- Nutritional Epidemiology Institute and School of Public Health, Tianjin Medical University, Tianjin, China
| | - Yeqing Gu
- Nutritional Epidemiology Institute and School of Public Health, Tianjin Medical University, Tianjin, China
| | - Liyun Fang
- Nutritional Epidemiology Institute and School of Public Health, Tianjin Medical University, Tianjin, China
| | - Fei Yu
- Nutritional Epidemiology Institute and School of Public Health, Tianjin Medical University, Tianjin, China
| | - Huijun Yang
- Nutritional Epidemiology Institute and School of Public Health, Tianjin Medical University, Tianjin, China
| | - Bin Yu
- Nutritional Epidemiology Institute and School of Public Health, Tianjin Medical University, Tianjin, China
| | - Shaomei Sun
- Health Management Centre, Tianjin Medical University General Hospital, Tianjin, China
| | - Xing Wang
- Health Management Centre, Tianjin Medical University General Hospital, Tianjin, China
| | - Ming Zhou
- Health Management Centre, Tianjin Medical University General Hospital, Tianjin, China
| | - Qiyu Jia
- Health Management Centre, Tianjin Medical University General Hospital, Tianjin, China
| | - Honglin Zhao
- Health Management Centre, Tianjin Medical University General Hospital, Tianjin, China
| | - Kun Song
- Health Management Centre, Tianjin Medical University General Hospital, Tianjin, China
| | - Kaijun Niu
- Nutritional Epidemiology Institute and School of Public Health, Tianjin Medical University, Tianjin, China.,Health Management Centre, Tianjin Medical University General Hospital, Tianjin, China.,Collaborative Innovation Center of Non-communicable Disease, Tianjin Medical University, Tianjin, China
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10
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Cravedi P, Mori G, Fischer F, Percudani R. Evolution of the Selenoproteome in Helicobacter pylori and Epsilonproteobacteria. Genome Biol Evol 2015; 7:2692-704. [PMID: 26342139 PMCID: PMC4607533 DOI: 10.1093/gbe/evv177] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/29/2015] [Indexed: 12/14/2022] Open
Abstract
By competing for the acquisition of essential nutrients, Helicobacter pylori has the unique ability to persist in the human stomach, also causing nutritional insufficiencies in the host. Although the H. pylori genome apparently encodes selenocysteine synthase (SelA, HP1513), a key pyridoxal phosphate (PLP)-dependent enzyme for the incorporation of selenium into bacterial proteins, nothing is known about the use of this essential element in protein synthesis by this pathogen. We analyzed the evolution of the complete machinery for incorporation of selenium into proteins and the selenoproteome of several H. pylori strains and related Epsilonproteobacteria. Our searches identified the presence of selenoproteins-including the previously unknown DUF466 family-in various Epsilonproteobacteria, but not in H. pylori. We found that a complete system for selenocysteine incorporation was present in the Helicobacteriaceae ancestor and has been recently lost before the split of Helicobacter acinonychis and H. pylori. Our results indicate that H. pylori, at variance with other gastric and enterohepatic Helicobacter, does not use selenocysteine in protein synthesis and does not use selenium for tRNA wobble base modification. However, selA has survived as a functional gene, having lost the domain for the binding of selenocysteine tRNA, but maintaining the ability to bind the PLP cofactor. The evolutionary modifications described for the SelA protein of H. pylori find parallels in other bacterial and archaeal species, suggesting that an alternative enzymatic function is hidden in many proteins annotated as selenocysteinyl-tRNA synthase.
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Affiliation(s)
| | - Giulia Mori
- Department of Life Sciences, University of Parma, Italy
| | - Frédéric Fischer
- Unité Pathogenèse de Helicobacter, Département de Microbiologie, Institut Pasteur, ERL CNRS 3526, Paris, France
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Öztürk N, Kurt N, Özgeriş FB, Baygutalp NK, Tosun MS, Bakan N, Bakan E. Serum Zinc, Copper, Magnesium and Selenium Levels in Children with Helicobacter Pylori Infection. Eurasian J Med 2015; 47:126-9. [PMID: 26180497 DOI: 10.5152/eurasianjmed.2015.104] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 10/30/2014] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVE Helicobacter pylori infection can cause disease from mild to severe that may be accompanied by micronutrient deficiencies. We aimed to investigate serum zinc, copper, magnesium and selenium levels in Helicobacter pylori positive children. MATERIALS AND METHODS Thirty-four children, with chronic abdominal pain and diag-nosed to be Helicobacter pylori-positive and 20 healthy children with the same demo-graphic characteristics were included in the study. Serum zinc, copper and magnesium levels were measured in the flame unit of atomic absorption spectrophotometer, selenium levels were measured in the graphite unit of the same atomic absorption spectrophotometer. RESULTS Serum zinc levels were significantly higher and serum magnesium levels were significantly lower (p<0.05) in Helicobacter pylori positive children than those of the control group. Although copper levels were lower in patient group than in control group, this difference was not statistically significant (p>0.05). There was no significant difference between serum selenium levels of two groups. CONCLUSION We concluded that in Helicobacter pylori-positive children, many trace elements and mineral metabolism may change.
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Affiliation(s)
- Nurinnisa Öztürk
- Department of Biochemistry, Ataturk University Faculty of Medicine, Erzurum Turkey
| | - Nezahat Kurt
- Department of Biochemistry, Ataturk University Faculty of Medicine, Erzurum Turkey
| | - Fatma Betül Özgeriş
- Department of Biochemistry, Ataturk University Faculty of Medicine, Erzurum Turkey
| | | | - Mahya Sultan Tosun
- Polyclinic of Paediatric Gastroenterology, Hepatology and Nutrition, Denizli State Hospital, Denizli, Turkey
| | - Nuri Bakan
- Department of Biochemistry, Ataturk University Faculty of Medicine, Erzurum Turkey
| | - Ebubekir Bakan
- Department of Biochemistry, Ataturk University Faculty of Medicine, Erzurum Turkey
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12
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Steinbrenner H, Al-Quraishy S, Dkhil MA, Wunderlich F, Sies H. Dietary selenium in adjuvant therapy of viral and bacterial infections. Adv Nutr 2015; 6:73-82. [PMID: 25593145 PMCID: PMC4288282 DOI: 10.3945/an.114.007575] [Citation(s) in RCA: 190] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Viral and bacterial infections are often associated with deficiencies in macronutrients and micronutrients, including the essential trace element selenium. In selenium deficiency, benign strains of Coxsackie and influenza viruses can mutate to highly pathogenic strains. Dietary supplementation to provide adequate or supranutritional selenium supply has been proposed to confer health benefits for patients suffering from some viral diseases, most notably with respect to HIV and influenza A virus (IAV) infections. In addition, selenium-containing multimicronutrient supplements improved several clinical and lifestyle variables in patients coinfected with HIV and Mycobacterium tuberculosis. Selenium status may affect the function of cells of both adaptive and innate immunity. Supranutritional selenium promotes proliferation and favors differentiation of naive CD4-positive T lymphocytes toward T helper 1 cells, thus supporting the acute cellular immune response, whereas excessive activation of the immune system and ensuing host tissue damage are counteracted through directing macrophages toward the M2 phenotype. This review provides an up-to-date overview on selenium in infectious diseases caused by viruses (e.g., HIV, IAV, hepatitis C virus, poliovirus, West Nile virus) and bacteria (e.g., M. tuberculosis, Helicobacter pylori). Data from epidemiologic studies and intervention trials, with selenium alone or in combination with other micronutrients, and animal experiments are discussed against the background of dietary selenium requirements to alter immune functions.
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Affiliation(s)
| | - Saleh Al-Quraishy
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia; and
| | - Mohamed A Dkhil
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia; and Department of Zoology and Entomology, Faculty of Science, Helwan University, Cairo, Egypt
| | - Frank Wunderlich
- Department of Biology, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Helmut Sies
- Institute of Biochemistry and Molecular Biology I and Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia; and
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Franceschi F, Tortora A, Di Rienzo T, D’Angelo G, Ianiro G, Scaldaferri F, Gerardi V, Tesori V, Lopetuso LR, Gasbarrini A. Role of Helicobacter pylori infection on nutrition and metabolism. World J Gastroenterol 2014; 20:12809-12817. [PMID: 25278679 PMCID: PMC4177464 DOI: 10.3748/wjg.v20.i36.12809] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Revised: 03/12/2014] [Accepted: 05/26/2014] [Indexed: 02/06/2023] Open
Abstract
Helicobacter pylori (H. pylori) is a gram-negative pathogen that is widespread all over the world, infecting more than 50% of the world’s population. It is etiologically associated with non-atrophic and atrophic gastritis, peptic ulcer and shows a deep association with primary gastric B-cell lymphoma and gastric adenocarcinoma. Recently, the medical research focused on the modification of the gastric environment induced by H. pylori infection, possibly affecting the absorption of nutrients and drugs as well as the production of hormones strongly implicated in the regulation of appetite and growth. Interestingly, the absorption of iron and vitamin B12 is impaired by H. pylori infection, while infected subjects have lower basal and fasting serum levels of ghrelin and higher concentration of leptin compared to controls. Since leptin is an anorexigenic hormone, and ghrelin stimulates powerfully the release of growth hormone in humans, H. pylori infection may finally induce growth retardation if acquired very early in the childhood and in malnourished children. This review is focused on the nutritional effects of H. pylori infection, such as the reduced bioavailability or the malabsorbption of essential nutrients, and of gastrointestinal hormones, as well as on the relationship between H. pylori and the metabolic syndrome.
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The effect of Helicobacter pylori eradication on the levels of essential trace elements. BIOMED RESEARCH INTERNATIONAL 2014; 2014:513725. [PMID: 25548772 PMCID: PMC4274842 DOI: 10.1155/2014/513725] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Accepted: 06/11/2014] [Indexed: 12/30/2022]
Abstract
Objective. This study was designed to compare the effect of Helicobacter pylori (H. pylori) infection treatment on serum zinc, copper, and selenium levels.
Patients and Methods. We measured the serum zinc, copper, and selenium levels in H. pylori-positive and H. pylori-negative patients. We also evaluated the serum levels of these trace elements after H. pylori eradication. These serum copper, zinc, and selenium levels were determined by inductively coupled plasma mass spectrometry. Results. Sixty-three H. pylori-positive patients and thirty H. pylori-negative patients were studied. Serum copper, zinc, and selenium levels had no significant difference between H. pylori-positive and H. pylori-negative groups. There were 49 patients with successful H. pylori eradication. The serum selenium levels were lower after successful H. pylori eradication, but not significantly (P = 0.06). There were 14 patients with failed H. pylori eradication. In this failed group, the serum selenium level after H. pylori eradication therapy was significantly lower than that before H. pylori eradication therapy (P < 0.05). The serum zinc and copper levels had no significant difference between before and after H. pylori eradication therapies. Conclusion. H pylori eradication regimen appears to influence the serum selenium concentration (IRB number: KMUH-IRB-20120327).
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Lahner E, Persechino S, Annibale B. Micronutrients (Other than iron) and Helicobacter pylori infection: a systematic review. Helicobacter 2012; 17:1-15. [PMID: 22221610 DOI: 10.1111/j.1523-5378.2011.00892.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND Many micronutrients depend on a healthy stomach for absorption. Helicobacter pylori chronic gastritis may alter gastric physiology affecting homeostasis of vitamins and minerals. OBJECTIVES Systematic review to assess whether H. pylori infection is associated with reduced micronutrient levels (other than iron) in the plasma or gastric juice and whether low micronutrient levels are modified by eradication treatment. METHOD Medline was searched for relevant publications from inception to June 2010. Studies describing micronutrient levels in H. pylori-infected and not-infected adults and/or the effect of eradication treatment on micronutrient levels were included. FINDINGS Fifty-two publications were selected: 46 investigated the association between H. pylori infection and reduced micronutrient levels and 14 the effect of eradication treatment on micronutrient levels. Sixty-four studies investigated vitamins (23 ascorbic acid, four ß-carotene, 21 cobalamin, 11 folate, and five α-tocopherol) and 10 addressed minerals (one calcium, one copper, one magnesium, one phosphorus, three selenium, and three zinc). Pooled standardized mean differences in micronutrient levels showed positive associations with H. pylori infection for ascorbic acid (gastric juice, -1.087) and cobalamin (-0.744), and a positive effect of eradication treatment, which increased ascorbic acid in the gastric juice (-1.408) and serum cobalamin (-1.910). No significant association between infection and low folate levels was observed. Meta-analyses for other micronutrients were not performed owing to insufficient data. CONCLUSIONS Meta-analyses indicate that H. pylori infection is associated with reduced levels of ascorbic acid and cobalamin, supported by the positive effect of eradication treatment. For other micronutrients, further studies are needed.
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Affiliation(s)
- Edith Lahner
- Digestive and Liver Disease Unit, University Sapienza, Sant'Andrea Hospital, Via Grottarossa 1035, 00189 Rome, Italy
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16
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17
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Camargo MC, Burk RF, Bravo LE, Piazuelo MB, Hill KE, Fontham ET, Motley AK, Yepez MC, Mora Y, Schneider BG, Correa P. Plasma selenium measurements in subjects from areas with contrasting gastric cancer risks in Colombia. Arch Med Res 2008; 39:443-51. [PMID: 18375257 PMCID: PMC2394852 DOI: 10.1016/j.arcmed.2007.12.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2007] [Accepted: 12/10/2007] [Indexed: 01/08/2023]
Abstract
BACKGROUND An inverse association between selenium status and incidence of different neoplasias including gastric cancer has been reported. This pilot study aimed to determine and compare selenium status in two Colombian populations with different gastric cancer risks: a high-risk area in the volcanic region of the Andes Mountains and a low-risk area on the Pacific coast. METHODS Eighty nine adult males were recruited in the outpatient clinics of two public hospitals (44 and 45 from high- and low-risk areas, respectively) and provided a blood sample. Seventy one (79.8%) participants underwent upper gastrointestinal endoscopy. Plasma selenium was assayed using a fluorometric method, selenoprotein-P by ELISA, and glutathione peroxidase activity by a spectrophometric method. Histological diagnosis and Helicobacter pylori infection were evaluated in gastric biopsy samples. Unpaired samples t-test and linear regression analyses were used for statistical analyses. RESULTS Although none of the subjects in either of the two geographic areas was selenium deficient, the level of plasma selenium was significantly lower in men from the high-risk area compared with those from the low-risk area. Levels of selenoprotein-P and glutathione peroxidase activity were similar between groups after adjustment for confounders. Selenium measurements were not associated with histopathological diagnosis. CONCLUSIONS The high incidence of gastric cancer in the Andean region of Colombia is unlikely to be explained by selenium deficiency. We cannot exclude, however, that suboptimal selenium levels may exist in the gastric mucosa of subjects in the high-risk area. Therefore, the benefit of selenium supplementation in gastric cancer prevention cannot be dismissed.
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Affiliation(s)
- Maria Constanza Camargo
- Department of Medicine, School of Medicine, Division of Gastroenterology, Hepatology and Nutrition, Vanderbilt University, Nashville, Tennessee
| | - Raymond F. Burk
- Department of Pathology, School of Medicine, Universidad del Valle, Cali, Colombia
| | - Luis E. Bravo
- Department of Pathology, School of Medicine, Universidad del Valle, Cali, Colombia
| | - Maria B. Piazuelo
- Department of Medicine, School of Medicine, Division of Gastroenterology, Hepatology and Nutrition, Vanderbilt University, Nashville, Tennessee
| | - Kristina E. Hill
- Department of Medicine, School of Medicine, Division of Gastroenterology, Hepatology and Nutrition, Vanderbilt University, Nashville, Tennessee
| | - Elizabeth T. Fontham
- School of Public Health, Louisiana State University Health Sciences Center, New Orleans, Louisiana
| | - Amy K. Motley
- Department of Medicine, School of Medicine, Division of Gastroenterology, Hepatology and Nutrition, Vanderbilt University, Nashville, Tennessee
| | - Maria C. Yepez
- Centro de Estudios en Salud, Universidad de Nariño, Pasto, Colombia
| | - Yolanda Mora
- Centro de Estudios en Salud, Universidad de Nariño, Pasto, Colombia
| | - Barbara G. Schneider
- Department of Medicine, School of Medicine, Division of Gastroenterology, Hepatology and Nutrition, Vanderbilt University, Nashville, Tennessee
| | - Pelayo Correa
- Department of Medicine, School of Medicine, Division of Gastroenterology, Hepatology and Nutrition, Vanderbilt University, Nashville, Tennessee
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Vega L, Rodríguez-Sosa M, García-Montalvo EA, Del Razo LM, Elizondo G. Non-optimal levels of dietary selenomethionine alter splenocyte response and modify oxidative stress markers in female mice. Food Chem Toxicol 2007; 45:1147-53. [PMID: 17306430 DOI: 10.1016/j.fct.2006.12.021] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2006] [Revised: 12/13/2006] [Accepted: 12/25/2006] [Indexed: 01/26/2023]
Abstract
Many studies evaluating the effects of selenium (Se) status on immunity utilize inorganic Se, although selenomethionine (Se-Met) has been suggested to be more bioavailable and less toxic. In the current study, we investigated the effects of dietary Se-Met on immune system function and cellular redox status in C57BL/6N female mice fed with low (0.02 ppm), sufficient (0.2 ppm, control group), or excess Se-Met (2 ppm) in the diet for 50 days. Low Se-Met intake reduced glutathione peroxidase (GPx) activity and glutathione concentration without modifying lipoperoxidation. While low Se-Met intake also reduced the number of B cells in the spleen, it increased mitogen-induced proliferation, IL-4 and IL-12 secretion when compared to the sufficient Se-Met intake group. In comparison to controls, excess Se-Met intake increased splenocyte proliferation and reduced B cell numbers, IL-4, and IL-12 secretion without affecting oxidative stress markers. These data suggest that Se-Met supplementation should be carefully evaluated as it many influence immune function.
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Affiliation(s)
- Libia Vega
- Sección Externa de Toxicología, Centro de Investigación y de Estudios Avanzados, Av. IPN 2508, San Pedro Zacatenco, México, DF 07360, Mexico.
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Annibale B, Capurso G, Delle Fave G. Consequences of Helicobacter pylori infection on the absorption of micronutrients. Dig Liver Dis 2002; 34 Suppl 2:S72-7. [PMID: 12408446 DOI: 10.1016/s1590-8658(02)80170-0] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Recent studies have suggested a relationship between Helicobacter pylori infection and various important micronutrients, including iron and vitamin B12, suggesting likely biological factors in the association between Helicobacter pylori and microcytic or macrocytic anaemia. There is some evidence that direct or indirect consequences of Helicobacter pylori gastritis on acid secretion account for the role of the bacterium in the absorption process of iron and Vitamin B12. The plasma, intragastric and mucosal concentration of different antioxidant compounds such as ascorbic acid, a-tocopherol and beta-carotene is also affected by Helicobacter pylori gastritis supporting the possible role of Helicobacter pylori in the multistep cascade leading to gastric carcinogenesis. The relationship between Helicobacter pylori infection and micronutrients is, therefore, a promising and, until now, poorly investigated field of research.
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Affiliation(s)
- B Annibale
- Department of Digestive and Liver Disease, II Medical School, Sant'Andrea Hospital, University La Sapienza Rome, Italy.
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