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Abstract
Helicobacter pylori is present in approximately one-half of the world's population. There are significant differences in prevalence based on region, age, race/ethnicity, and socioeconomic status. H pylori is the most common cause of infection-related cancers. Studies have demonstrated the relationship between H pylori infection and gastric adenocarcinoma and mucosa-associated lymphoid tissue lymphoma. H pylori has features and enzymatic properties allowing it to survive in the acidic stomach environment, and has specific virulence factors that promote an increased risk of gastric pathology. Eradication of H pylori is first-line therapy for mucosa-associated lymphoid tissue lymphoma and decreases the risk of gastric adenocarcinoma.
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ARJOMAND FARD N, TABRIZIAN N, MIRZAEI R, HADJATI J, TOFIGHI ZAVAREH F, SALEHI NODEH AR, MIRSHAFIEY A. Efficacy and Safety of G2013 as a Novel Immunosuppressive Agent on Differentiation, Maturation and Function of Human Dendritic Cells. IRANIAN JOURNAL OF PUBLIC HEALTH 2017; 46:216-221. [PMID: 28451557 PMCID: PMC5402780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND The expanse of dendritic cells (DC) differentiation plays an important role in determining immune response. DC-based immunosuppressive drugs have notable side effects in increasing the risk of infectious diseases and cancers. G2013, as a novel anti-inflammatory and immunosuppressive agent, has been tested in experimental model of multiple sclerosis. The aim of this study was to conduct the safety property of G2013 on dendritic cells biology. METHODS The effect of G2013 on differentiation, maturation, and function of dendritic cells was examined at Tehran University in 2014. To investigate how G2013 affects human dendritic cells (DC) in a defined inflammatory environment, human peripheral blood mononuclear cells (PBMC) were isolated from healthy blood. Monocytes were then purified using anti-CD14 microbeads. Monocytes were treated with G2013 in two different doses (6 and 12 μg/well) along with adding granulocyte-macrophage colony-stimulating factor (GM-CSF) and interleukin-4 for inducing monocytes to immature DC and adding lipopolysaccharide for running DC maturation. Differentiation, maturation, and function of dendritic cells were examined with flow cytometry and ELISA. RESULTS G2013 therapy had no significant effect on CD83, CD86 and DR expression, as well as IL-10 and IL-12 cytokine levels and it, has no remarkable side on differentiation, maturation and function of dendritic cells in immature DC and mature DC process in vitro. CONCLUSION G2013 is a safe agent with no adverse effect on differentiation, maturation, and function of dendritic cells. It may be recommended as a novel immunosuppressive agent with no or little side effect in increasing the risk of infectious diseases and cancers.
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Affiliation(s)
- Nazanin ARJOMAND FARD
- Dept. of Cellular and Molecular Biology, Kish International Campus, University of Tehran, Tehran, Iran
| | - Nakisa TABRIZIAN
- Dept. of Cellular and Molecular Biology, Kish International Campus, University of Tehran, Tehran, Iran
| | - Reza MIRZAEI
- Dept. of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Jamshid HADJATI
- Dept. of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Farzaneh TOFIGHI ZAVAREH
- Dept. of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Reza SALEHI NODEH
- Dept. of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Abbas MIRSHAFIEY
- Dept. of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran,Corresponding Author:
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Dominguez PA, Pro-Martinez A, Narciso-Gaytán C, Hernández-Cázares A, Sosa-Montes E, Perez-Hernandez P, Caldwell D, Ruiz-Feria CA. Concurrent supplementation of arginine and antioxidant vitamins E and C reduces oxidative stress in broiler chickens after a challenge withEimeriaspp. CANADIAN JOURNAL OF ANIMAL SCIENCE 2015. [DOI: 10.4141/cjas-2014-083] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Dominguez P.A., Pro-Martinez, A., Narciso-Gaytán, C., Hernández-Cázares, A., Sosa-Montes, E., Perez-Hernandez, P., Caldwell, D. and Ruiz-Feria, C. A. 2015. Concurrent supplementation of arginine and antioxidant vitamins E and C reduces oxidative stress in broiler chickens after a challenge with Eimeria spp. Can. J. Anim. Sci. 95: 143–153. Oxidation is a major problem associated with pathogen damage in animals. One-day-old mixed-sex broiler chicks (Cobb 500; n=624) were randomly assigned to one of six treatments: a basal diet [CTL; 40 mg of vitamin E (VE) kg−1of feed and 1.5% Arginine (Arg)] or the basal diet plus Arg (ARG; 0.3%), Arg+VE (AVE; 0.3% and 40 mg kg−1respectively), Arg+vitamin C (VC) (AVC; 0.3% and 1 g kg−1respectively), VE+VC (VEC; 40 mg+1 g kg−1respectively), or Arg+VE+VC (AVEC; 0.3%+40 mg+1 g kg−1respectively). At day 14, all birds were orally challenged with 100× the normal dose of Advent®coccidiosis vaccine (450 000 oocysts). Intestinal lesion scores (LS) in duodenum, jejunum and ceca were recorded, along with relative immune system organ weights at day 23. Plasma samples were taken before (2 h) and after challenge (12, 24 and 48 h) to determine malondialdehyde (MDA), nitric oxide (NO) and glutathione peroxidase activity (GPx). Birds fed the VEC diet were heavier at 7 d (P<0.05) than birds fed the AVE diet. CTL birds had heavier (P<0.05) bursas than AVC birds; no differences among treatments for spleen and thymus were found. The jejunum LS was lower in the AVC and VEC birds than in CTL birds, whereas ceca LS was highest in AVE birds, and the duodenum LS was not affected by treatment. Birds fed the AVEC diet had the lowest MDA levels before challenge, but higher levels of MDA than birds fed the CTL, ARG or AVE 12 h after challenge. Before challenge ARG birds had higher (P<0.05) NO levels than AVEC-fed birds, but 12 h after challenge birds fed the CTL, ARG or AVE diet had lower NO levels than birds fed the AVC, VEC or AVEC diet. Before challenge AVEC-fed birds had higher (P<0.001) GPx activity than CTL, ARG and AVE birds, but after 12, 24 and 48 h VEC birds showed higher GPx activity than CTL, ARG- and AVE-fed birds. Although Arg, VE and VC, modulated oxidative stress during coccidiosis challenge, the effects were not sufficient to affect performance relative to the control diet.
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Affiliation(s)
- P. A. Dominguez
- Colegio de Postgraduados, Orientacion Ganaderia, Montecillos, Mexico, 56230
| | - A. Pro-Martinez
- Colegio de Postgraduados, Orientacion Ganaderia, Montecillos, Mexico, 56230
| | - C. Narciso-Gaytán
- Colegio de Postgraduados, Campus Cordoba, Amatlan de los Reyes, Veracruz, Mexico 94946
| | - A. Hernández-Cázares
- Colegio de Postgraduados, Campus Cordoba, Amatlan de los Reyes, Veracruz, Mexico 94946
| | - E. Sosa-Montes
- Universidad Autonoma Chapingo, departamento de Zootecnia, Chapingo, Mexico, 56230
| | | | - D. Caldwell
- Texas A&M University, Department of Poultry Science, College Station, USA 77843
| | - C. A. Ruiz-Feria
- Texas A&M University, Department of Poultry Science, College Station, USA 77843
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Short term micronutrient-antioxidant supplementation has no impact on a serological marker of gastric atrophy in Zambian adults: retrospective analysis of a randomised controlled trial. BMC Gastroenterol 2014; 14:52. [PMID: 24666552 PMCID: PMC3987176 DOI: 10.1186/1471-230x-14-52] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Accepted: 03/18/2014] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Gastric cancer is a major contributor to cancer deaths in Zambia but, as elsewhere, no preventive strategies have been identified. We set out to investigate the possibility of reducing gastric atrophy, a premalignant lesion, using micronutrient-antioxidant supplementation. METHODS We analysed 215 archival samples from a randomised controlled trial of micronutrient-antioxidant supplementation carried out from 2003 to 2006. Participants were randomised to receive either the supplement or placebo and had been taking the allocated intervention for a mean of 18 (range 14-27) months when the samples used in this study were taken. We used low pepsinogen 1 to 2 (PEP1:2) ratio as a surrogate marker of gastric atrophy. A PEP 1:2 ratio of less than three was considered low. HIV serology, age, nutritional status, smoking, alcohol intake and gastric pH were also analysed. Ethical approval was obtained from the University of Zambia Biomedical Research Ethics Committee (011-04-12). The randomized trial was registered (ISRCTN31173864). RESULTS The overall prevalence of low PEP 1:2 ratio was 15/215 (7%) and it did not differ between the placebo (8/103, 7.8%) and micronutrient groups (7/112, 6.3%; HR 1.24; 95% CI 0.47-3.3; P = 0.79). The presence of low PEP 1:2 ratio was not influenced by HIV infection (HR 1.07; 95% CI 0.37-3.2; P =0.89) or nutritional status but it inversely correlated with gastric pH (Spearman's rho = -0.34; P = 0.0001). Age above 40 years was associated with atrophy, but neither alcohol nor smoking had any influence. CONCLUSION Short term micronutrient supplementation does not have any impact on PEP 1:2 ratio, a serological marker of gastric atrophy. PEP 1:2 ratio inversely correlates with gastric pH.
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Jeong YJ, Kim JH, Hong JM, Kang JS, Kim HR, Lee WJ, Hwang YI. Vitamin C treatment of mouse bone marrow-derived dendritic cells enhanced CD8(+) memory T cell production capacity of these cells in vivo. Immunobiology 2014; 219:554-64. [PMID: 24698552 DOI: 10.1016/j.imbio.2014.03.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Revised: 07/16/2013] [Accepted: 03/12/2014] [Indexed: 12/13/2022]
Abstract
Vitamin C has been found to stimulate dendritic cells (DCs) to secrete more IL-12 and thereby drive naïve CD4(+) T cells to differentiate into Th1 cells. In the present study, we evaluated the effect of these vitamin C-treated DCs on CD8(+) T cell differentiation both in vitro and in vivo. Mouse bone marrow-derived DCs were prepared in the presence of GM-CSF and IL-15. With vitamin C treatment, these DCs, when LPS-stimulated, secreted more IL-12p70 and IL-15 than did untreated DCs. And when co-cultured with T cells, they yielded a higher frequency of IFN-γ(+) CD8(+) T cells. Moreover, we found that administering vitamin C-treated and tumor lysate-loaded DCs into mice yielded a higher frequency of CD44(high) CD62L(low) CD8(+) effector and effector memory T cells, which showed an increased ex vivo killing effect of the tumor cells. These DCs also elicited enhanced protective effects against inoculated tumor cells, most probably by way of the increased cytotoxic T cells, as was revealed by the decreased growth of the inoculated tumor cells in these mice. This ex vivo vitamin C treatment effect on DCs can be considered as a strategy for boosting DC vaccination potency against tumors.
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Affiliation(s)
- Young-Joo Jeong
- Department of Anatomy, Seoul National University College of Medicine, Seoul 110-799, Republic of Korea
| | - Jin-Hee Kim
- Department of Anatomy, Seoul National University College of Medicine, Seoul 110-799, Republic of Korea
| | - Jun-Man Hong
- Department of Anatomy, Seoul National University College of Medicine, Seoul 110-799, Republic of Korea
| | - Jae Seung Kang
- Department of Anatomy, Seoul National University College of Medicine, Seoul 110-799, Republic of Korea
| | - Hang-Rae Kim
- Department of Anatomy, Seoul National University College of Medicine, Seoul 110-799, Republic of Korea
| | - Wang Jae Lee
- Department of Anatomy, Seoul National University College of Medicine, Seoul 110-799, Republic of Korea
| | - Young-il Hwang
- Department of Anatomy, Seoul National University College of Medicine, Seoul 110-799, Republic of Korea.
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Abstract
Since its discovery in 1982, the global importance of Helicobacter pylori-induced disease, particularly in developing countries, remains high. The use of rodent models, particularly mice, and the unanticipated usefulness of the gerbil to study H. pylori pathogenesis have been used extensively to study the interactions of the host, the pathogen, and the environmental conditions influencing the outcome of persistent H. pylori infection. Dietary factors in humans are increasingly recognized as being important factors in modulating progression and severity of H. pylori-induced gastric cancer. Studies using rodent models to verify and help explain mechanisms whereby various dietary ingredients impact disease outcome should continue to be extremely productive.
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Affiliation(s)
- James G. Fox
- Division of Comparative Medicine, Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - Timothy C. Wang
- Division of Digestive and Liver Diseases, Department of Medicine, Columbia University Medical Center, New York, New York
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Kim HW, Cho SI, Bae S, Kim H, Kim Y, Hwang YI, Kang JS, Lee WJ. Vitamin C Up-regulates Expression of CD80, CD86 and MHC Class II on Dendritic Cell Line, DC-1 Via the Activation of p38 MAPK. Immune Netw 2012; 12:277-83. [PMID: 23396903 PMCID: PMC3566423 DOI: 10.4110/in.2012.12.6.277] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 12/11/2012] [Accepted: 12/14/2012] [Indexed: 01/15/2023] Open
Abstract
Vitamin C is an essential water-soluble nutrient which primarily exerts its effect on host defense mechanisms and immune homeostasis, but the mechanism related to immune-potentiation is poorly understood. Since dendritic cells (DCs) are known as a potent antigen presenting cell (APC) that could enhance the antigen specific immune responses, we investigate the effects of vitamin C on activation of DCs and its related mechanism by using dendritic cell lines, DC-1. First, we found that there was no damage on DC-1 by 2.5 mM of vitamin C. In the presence of vitamin C, the expression of CD80, CD86, and MHC molecules was increased, but it was decreased by the pre-treatment of SB203580, p38 MAPK-specific inhibitor. We confirmed the phosphorylation of p38 MAPK was increased by the treatment of vitamin C. Taken together, these results suggest that vitamin C could enhance the activity of dendritic cells via the up-regulation of the expression of CD80, CD86, and MHC molecules and the activation of p38 MAPK is related to this process.
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Affiliation(s)
- Hyung Woo Kim
- School of Korean Medicine, Pusan National University, Pusan 626-870, Korea
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Effect of vitamins C and E supplementation on Helicobacter pylori eradication: a meta-analysis. Br J Nutr 2011; 106:1632-7. [PMID: 21810287 DOI: 10.1017/s0007114511003813] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Vitamins C and E can act as potent antioxidants to reduce the damage caused by reactive oxygen species in gastric mucosa. Whether vitamin supplements for Helicobacter pylori eradication regimen could improve the rate of eradication remains uncertain. Therefore, we performed a meta-analysis to evaluate the efficacy of vitamins C and E supplementation for the eradication of H. pylori. Searches were conducted in the databases PubMed, EMBASE and Cochrane Library. Randomised controlled trials (RCT) that fulfilled the inclusion criteria and addressed the clinical questions of this analysis were further assessed. Of the six RCT included, five had a low methodological quality. Of the six RCT, three compared the efficacy of the eradication regimen v. eradication regimen plus vitamins C and E. The result of the meta-analysis showed a non-significant difference in the eradication rate of H. pylori between the two groups (risk ratio (RR) 0·93, P = 0·76). Another three RCT compared the eradication regimen v. eradication regimen plus vitamin C only, and there too there was no significant difference in the eradication rate (RR 0·83, P = 0·32). In conclusion, vitamins C and/or E supplements to the H. pylori eradication regimen could not improve the eradication rate. However, currently available data do not draw a definitive conclusion about the effectiveness of antioxidant vitamins on H. pylori eradication, owing to the small sample size and low-to-moderate methodological quality.
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Jiao Y, Zhang J, Yan J, Stuart J, Gibson G, Lu L, Willaims R, Wang YJ, Gu W. Differential gene expression between wild-type and Gulo-deficient mice supplied with vitamin C. Genet Mol Biol 2011; 34:386-95. [PMID: 21931508 PMCID: PMC3168176 DOI: 10.1590/s1415-47572011005000031] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Accepted: 02/17/2011] [Indexed: 01/01/2023] Open
Abstract
The aim of this study was to test the hypothesis that hepatic vitamin C (VC) levels in VC deficient mice rescued with high doses of VC supplements still do not reach the optimal levels present in wild-type mice. For this, we used a mouse scurvy model (sfx) in which the L-gulonolactone oxidase gene (Gulo) is deleted. Six age- (6 weeks old) and gender- (female) matched wild-type (WT) and sfx mice (rescued by administering 500 mg of VC/L) were used as the control (WT) and treatment (MT) groups (n = 3 for each group), respectively. Total hepatic RNA was used in triplicate microarray assays for each group. EDGE software was used to identify differentially expressed genes and transcriptomic analysis was used to assess the potential genetic regulation of Gulo gene expression. Hepatic VC concentrations in MT mice were significantly lower than in WT mice, even though there were no morphological differences between the two groups. In MT mice, 269 differentially expressed transcripts were detected (≥ twice the difference between MT and WT mice), including 107 up-regulated and 162 down-regulated genes. These differentially expressed genes included stress-related and exclusively/predominantly hepatocyte genes. Transcriptomic analysis identified a major locus on chromosome 18 that regulates Gulo expression. Since three relevant oxidative genes are located within the critical region of this locus we suspect that they are involved in the down-regulation of oxidative activity in sfx mice.
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Affiliation(s)
- Yan Jiao
- Department of Orthopaedic Surgery, Campbell Clinic, and Pathology, University of Tennessee Health Science Center, Memphis, TN, USA
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Ascorbate promotes carbon tetrachloride-induced hepatic injury in senescence marker protein 30-deficient mice by enhancing inflammation. J Nutr Biochem 2011; 22:535-42. [DOI: 10.1016/j.jnutbio.2010.04.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2009] [Revised: 04/07/2010] [Accepted: 04/12/2010] [Indexed: 01/24/2023]
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Time course of vitamin C distribution and absorption after oral administration in SMP30/GNL knockout mice. Nutrition 2011; 27:471-8. [DOI: 10.1016/j.nut.2010.04.010] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2009] [Revised: 03/29/2010] [Accepted: 04/30/2010] [Indexed: 02/08/2023]
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Jeong YJ, Kim JH, Kang JS, Lee WJ, Hwang YI. Mega-dose vitamin C attenuated lung inflammation in mouse asthma model. Anat Cell Biol 2010; 43:294-302. [PMID: 21267403 PMCID: PMC3026181 DOI: 10.5115/acb.2010.43.4.294] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2010] [Revised: 10/06/2010] [Accepted: 10/19/2010] [Indexed: 12/19/2022] Open
Abstract
Asthma is a Th2-dependent disease mediated by IgE and Th2 cytokines, and asthmatic patients suffer from oxidative stresses from abnormal airway inflammation. Vitamin C is a micro-nutrient functioning as an antioxidant. When administered at a mega-dose, vitamin C has been reported to shift immune responses toward Th1. Thus, we tried to determine whether vitamin C exerted beneficial effects in asthma animal model. Asthma was induced in mice by sensitizing and challenging with ovalbumin. At the time of challenge, 3~5 mg of vitamin C was administered and the effects were evaluated. Vitamin C did not modulate Th1/Th2 balance in asthma model. However, it decreased airway hyperreactivity to methacholine, decreased inflammatory cell numbers in brochoalveolar lavage fluid, and moderate reduction of perivascular and peribronchiolar inflammatory cell infiltration. These results suggest that vitamin C administered at the time of antigen challenge exerted anti-inflammatory effects. Further studies based on chronic asthma model are needed to evaluate a long-term effect of vitamin C in asthma. In conclusion, even though vitamin C did not show any Th1/Th2 shifting effects in this experiment, it still exerted moderate anti-inflammatory effects. Considering other beneficial effects and inexpensiveness of vitamin C, mega-dose usage of vitamin C could be a potential supplementary modality for the management of asthma.
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Affiliation(s)
- Young-Joo Jeong
- Department of Anatomy and Tumor Immunity Medical Research Center, Seoul National University College of Medicine, Seoul, Korea
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Jeong YJ, Hong SW, Kim JH, Jin DH, Kang JS, Lee WJ, Hwang YI. Vitamin C-treated murine bone marrow-derived dendritic cells preferentially drive naïve T cells into Th1 cells by increased IL-12 secretions. Cell Immunol 2010; 266:192-9. [PMID: 21074755 DOI: 10.1016/j.cellimm.2010.10.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Revised: 10/11/2010] [Accepted: 10/15/2010] [Indexed: 12/14/2022]
Abstract
Vitamin C has been reported to shift immune responses toward Th1. In this study, we evaluated whether this effect was by way of dendritic cells. Murine dendritic cells (DCs) were prepared from bone marrow precursors. DCs treated with vitamin C secreted an increased amount of IL-12p70 after activation with LPS. These cells rendered naïve T cells to secrete more Th1 cytokine, IFN-γ, and less Th2-cytokine, IL-5 in the culture supernatants. Vitamin C-treatment also increased phosphorylation of p38 and ERK1/2 in DCs. p38 inhibitor in culture media suppressed the effect of vitamin C to elevate IL-12p70 secretion. In contrast, ERK inhibitor elevated IL-12p70 secretion. In summary, vitamin C taken up into DCs increased IL-12p70 secretion of these cells by modulating the activation of signal molecules, and thus shifted immune responses toward Th1. These data provide us a new insight on the role of vitamin C in modulating immune responses.
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Affiliation(s)
- Young-Joo Jeong
- Department of Anatomy and Tumor Immunity Medical Research Center, Seoul National University, College of Medicine, Chongno-Gu, Seoul 110-799, Republic of Korea
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Yong Jin Kim, Seung Yup Ku, Rosenwaks Z, Hung Ching Liu, Sung Wook Chi, Jae Seung Kang, Wang Jae Lee, Kyung Chun Jung, Seok Hyun Kim, Young Min Choi, Jung Gu Kim, Shin Yong Moon. MicroRNA Expression Profiles are Altered by Gonadotropins and Vitamin C Status During In Vitro Follicular Growth. Reprod Sci 2010; 17:1081-9. [DOI: 10.1177/1933719110377663] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Yong Jin Kim
- Department of Obstetrics and Gynecology, Seoul National University, Seoul, South Korea, Institute of Reproductive Medicine and Population, Medical Research Center, Seoul National University, Seoul, South Korea
| | - Seung Yup Ku
- Department of Obstetrics and Gynecology, Seoul National University, Seoul, South Korea, Institute of Reproductive Medicine and Population, Medical Research Center, Seoul National University, Seoul, South Korea,
| | - Zev Rosenwaks
- Center for Reproductive Medicine and Infertility, Cornell Weill Medical College, New York, NY, USA
| | - Hung Ching Liu
- Center for Reproductive Medicine and Infertility, Cornell Weill Medical College, New York, NY, USA
| | | | - Jae Seung Kang
- Department of Anatomy, Seoul National University, Seoul, South Korea
| | - Wang Jae Lee
- Department of Anatomy, Seoul National University, Seoul, South Korea
| | - Kyung Chun Jung
- Department of Pathology, College of Medicine, Seoul National University, Seoul, South Korea
| | - Seok Hyun Kim
- Department of Obstetrics and Gynecology, Seoul National University, Seoul, South Korea, Institute of Reproductive Medicine and Population, Medical Research Center, Seoul National University, Seoul, South Korea
| | - Young Min Choi
- Department of Obstetrics and Gynecology, Seoul National University, Seoul, South Korea, Institute of Reproductive Medicine and Population, Medical Research Center, Seoul National University, Seoul, South Korea
| | - Jung Gu Kim
- Department of Obstetrics and Gynecology, Seoul National University, Seoul, South Korea
| | - Shin Yong Moon
- Department of Obstetrics and Gynecology, Seoul National University, Seoul, South Korea, Institute of Reproductive Medicine and Population, Medical Research Center, Seoul National University, Seoul, South Korea
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Woo A, Kim JH, Jeong YJ, Maeng HG, Lee YT, Kang JS, Lee WJ, Hwang YI. Vitamin C acts indirectly to modulate isotype switching in mouse B cells. Anat Cell Biol 2010; 43:25-35. [PMID: 21190002 PMCID: PMC2998772 DOI: 10.5115/acb.2010.43.1.25] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2010] [Revised: 02/05/2010] [Accepted: 02/13/2010] [Indexed: 11/27/2022] Open
Abstract
Vitamin C, one of essential micronutrients, has been reported to modulate the humoral immune responses in some mammals. We investigated whether vitamin C might modulate this response in mice by directly affecting B cells. Splenic B cells were isolated and activated by CD40- and B cell receptor-ligation in vitro. The cells were cultured with a pretreatment of vitamin C from 0 to 1 mM of concentrations. Vitamin C slightly increased apoptosis of B cells dose-dependently and behaved as an antioxidant. We found that in vivo administration of vitamin C by intraperitoneal injection affected isotype switching as previously reported: the titer of antigen-specific IgG1 antibody was decreased, while that of IgG2a was unaffected. Somewhat different from those observed in vivo, in vitro exposure to vitamin C slightly decreased isotype switching to IgG1 and increased isotype switching to IgG2a. Pretreatment with vitamin C in the safe range did not affect either proliferation of cultured B cells or the expression of CD80 and CD86 in those cells. Taken together, in vivo results suggest that vitamin C acts to modulate isotype switching in the mouse. However, because of our in vitro results, we suggest that the modulation exerted by vitamin C in vivo is by indirectly affecting B cells, perhaps by directly influencing other immune cells such as dendritic cells.
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Affiliation(s)
- Ami Woo
- Department of Anatomy and Tumor Immunity Medical Research Center, Seoul National University College of Medicine, Seoul, Korea
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Kim HJ, Park MK, Rhee KH, Youn HS, Ko SH, Kim HS, Chung MH. Long-Term Intake of High Doses of Vitamin C Down-regulates Anti-oxidant Enzymes in Human Erythrocytes. Prev Nutr Food Sci 2008. [DOI: 10.3746/jfn.2008.13.3.139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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