1
|
Halder CE, Das PP, Rahman SMT, Bhoumick LC, Tassdik H, Hasan MA, Mithun SN. Occupational hazards and risks among the women in fisher communities in Cox's Bazar and Chattogram, Bangladesh. PLoS One 2024; 19:e0297400. [PMID: 39028714 PMCID: PMC11259271 DOI: 10.1371/journal.pone.0297400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 06/03/2024] [Indexed: 07/21/2024] Open
Abstract
BACKGROUND Women in the fisher communities in coastal regions of Bangladesh are engaged in a wide range of fishery activities. However, there is limited evidence available on the occupational hazards and risks experienced by them. METHOD The study was conducted among fishing colonies in Cox's Bazar and Chattogram districts in Bangladesh. This was a cross-sectional study blending qualitative and quantitative approaches. The qualitative component comprised five focus group discussions to understand the occupational context, hazards, and risks faced by the fisherwomen, informing the questionnaire design for the subsequent survey. The quantitative survey involved a sample of 207 women from fisher communities, gathering socio-demographic information, occupational hazards, risks, and health and safety practices. FINDINGS The study found a high occurrence of occupational hazards, health risks and limited availability of preventive measures among the women in fisher communities. Occupational hazards include physical safety hazards such as slippery surfaces and fish cutting instruments, and physical hazards like prolonged sun exposure and noise. Chemical hazards like pesticides and saltwater, ergonomic hazards such as prolonged uncomfortable posture and heavy lifting, and biological hazards including inadequate sanitation facilities were prevalent. The study also identified the potential occupational risks, and the outcomes resulting from the hazards, including injuries (87.44%), musculoskeletal conditions (69.08%), skin diseases/conditions (56.52%), eye complaints (33.82%), severe respiratory distress (24.15%) and high incidence of self-reported communicable diseases. Most women (78.26%) did not use personal protective equipment, and the majority (93.72%) lacked a workplace first aid kit. CONCLUSION The study revealed a high prevalence of occupational hazards and health risks, including injuries and diseases, among Bangladeshi women in fisher communities with insufficient safety measures. Collaboration among government, NGOs, development partners, fisheries stakeholders, and the community is imperative for targeted training, innovative procedures, ergonomic solutions, provision of protective equipment, and advocacy to enhance the well-being of these women.
Collapse
Affiliation(s)
- Charls Erik Halder
- Public Health and Research Division, Bright Bangladesh Forum, Chattogram, Bangladesh
| | - Partha Pratim Das
- Department of Public Health, State University of Bangladesh, Dhaka, Bangladesh
| | | | | | - Hamim Tassdik
- Department of Public Health, North South University, Dhaka, Bangladesh
| | - Md. Abeed Hasan
- Department of Public Health, North South University, Dhaka, Bangladesh
- UFR Sciences du Vivant, Universite Paris Cite, Paris, France
| | | |
Collapse
|
2
|
Chiang BM, Ye M, Chattopadhyay A, Halezeroglu Y, Van Blarigan EL, Abuabara K. Sodium Intake and Atopic Dermatitis. JAMA Dermatol 2024; 160:725-731. [PMID: 38837130 PMCID: PMC11154362 DOI: 10.1001/jamadermatol.2024.1544] [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: 12/04/2023] [Accepted: 04/12/2024] [Indexed: 06/06/2024]
Abstract
Importance The association of diet with atopic dermatitis (AD) remains poorly understood and could help explain heterogeneity in disease course. Objective To determine the extent to which a higher level of dietary sodium intake, estimated using urine sodium as a biomarker, is associated with AD in a large, population-based cohort. Design, Setting, and Participants This cross-sectional study of adult participants (aged 37-73 years) from the UK Biobank examined 24-hour urine sodium excretion, which was estimated using a single spot urine sample collected between March 31, 2006, and October 1, 2010, and calculations from the sex-specific International Cooperative Study on Salt, Other Factors, and Blood Pressure equation, incorporating body mass index; age; and urine concentrations of potassium, sodium, and creatinine. The data were analyzed between February 23, 2022, and March 20, 2024. Exposure The primary exposure was 24-hour urinary sodium excretion. Main Outcome and Measure The primary outcome was AD or active AD based on diagnostic and prescription codes from linked electronic medical records. Multivariable logistic regression models adjusted for age, sex, race and ethnicity, Townsend Deprivation Index, and education were used to measure the association. Results The analytic sample comprised 215 832 participants (mean [SD] age, 56.52 [8.06] years; 54.3% female). Mean (SD) estimated 24-hour urine sodium excretion was 3.01 (0.82) g per day, and 10 839 participants (5.0%) had a diagnosis of AD. Multivariable logistic regression revealed that a 1-g increase in estimated 24-hour urine sodium excretion was associated with increased odds of AD (adjusted odds ratio [AOR], 1.11; 95% CI, 1.07-1.14), increased odds of active AD (AOR, 1.16; 95% CI, 1.05-1.28), and increased odds of increasing severity of AD (AOR, 1.11; 95% CI, 1.07-1.15). In a validation cohort of 13 014 participants from the National Health and Nutrition Examination Survey, a 1 g per day higher dietary sodium intake estimated using dietary recall questionnaires was associated with a higher risk of current AD (AOR, 1.22; 95% CI, 1.01-1.47). Conclusions and Relevance These findings suggest that restriction of dietary sodium intake may be a cost-effective and low-risk intervention for AD.
Collapse
Affiliation(s)
- Brenda M. Chiang
- Department of Dermatology, University of California, San Francisco
| | - Morgan Ye
- Department of Dermatology, University of California, San Francisco
| | | | | | - Erin L. Van Blarigan
- Department of Epidemiology and Biostatistics, University of California, San Francisco
- Department of Urology, University of California, San Francisco
| | - Katrina Abuabara
- Department of Dermatology, University of California, San Francisco
- Division of Epidemiology and Biostatistics, University of California, Berkeley
| |
Collapse
|
3
|
Ye M, Chan LN, Douglas I, Margolis DJ, Langan SM, Abuabara K. Antihypertensive Medications and Eczematous Dermatitis in Older Adults. JAMA Dermatol 2024; 160:710-716. [PMID: 38776099 PMCID: PMC11112493 DOI: 10.1001/jamadermatol.2024.1230] [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: 10/11/2023] [Accepted: 03/23/2024] [Indexed: 05/25/2024]
Abstract
Importance Rates of physician-diagnosed eczema have been increasing among older adults, but little is known regarding the pathophysiologic processes and best treatments in this subgroup. Preliminary data suggest that medications-antihypertensive medications in particular-may contribute to eczematous dermatitis; however, there are limited population-based data on the proportion of eczematous dermatitis diagnoses among older adults that may be attributed to antihypertensive drugs. Objectives To determine whether antihypertensive drug use is associated with eczematous dermatitis in older adults. Design, Settings, and Participants This was a longitudinal cohort study of a population-based sample of individuals 60 years and older without a diagnosis of eczematous dermatitis at baseline. It was conducted at primary care practices participating in The Health Improvement Network in the United Kingdom from January 1, 1994, to January 1, 2015. Data analyses were performed from January 6, 2020, to February 6, 2024. Exposure Exposure date by first prescription for an antihypertensive drug within each drug class. Main outcome measures Newly active eczematous dermatitis was based on the first date for 1 of the 5 most common eczema codes used in a previously validated algorithm. Results Among the total study sample of 1 561 358 older adults (mean [SD] age, 67 [9] years; 54% female), the overall prevalence of eczematous dermatitis was 6.7% during a median (IQR) follow-up duration of 6 (3-11) years. Eczematous dermatitis incidence was higher among participants receiving antihypertensive drugs than those who did not (12 vs 9 of 1000 person-years of follow-up). Adjusted Cox proportional hazard models found that participants who received any antihypertensive drugs had a 29% increased hazard rate of any eczematous dermatitis (hazard ratio [HR], 1.29; 95% CI, 1.26-1.31). When assessing each antihypertensive drug class individually, the largest effect size was observed for diuretic drugs (HR, 1.21; 95% CI, 1.19-1.24) and calcium channel blockers (HR, 1.16; 95% CI, 1.14-1.18), and the smallest effect sizes were for angiotensin-converting enzyme inhibitors (HR, 1.02; 95% CI, 1.00-1.04) and β-blockers (HR, 1.04; 95% CI, 1.02-1.06). Conclusions and Relevance This cohort study found that antihypertensive drugs were associated with a small increased rate of eczematous dermatitis, with effect sizes largest for calcium channel blockers and diuretic drugs, and smallest for angiotensin-converting enzyme inhibitors and β-blockers. Although additional research is needed to understand the mechanisms underlying the association, these data could be helpful to clinicians to guide management when a patient presents with eczematous dermatitis in older age.
Collapse
Affiliation(s)
- Morgan Ye
- Department of Dermatology, University of California, San Francisco
| | - Leslie N. Chan
- Department of Dermatology, University of California, San Francisco
| | - Ian Douglas
- Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | | | - Sinéad M. Langan
- Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Katrina Abuabara
- Department of Dermatology, University of California, San Francisco
- Division of Epidemiology and Biostatistics, University of California, Berkeley
| |
Collapse
|
4
|
Musiol S, Harris CP, Gschwendtner S, Burrell A, Amar Y, Schnautz B, Renisch D, Braun SC, Haak S, Schloter M, Schmidt-Weber CB, Zielinski CE, Alessandrini F. The impact of high-salt diet on asthma in humans and mice: Effect on specific T-cell signatures and microbiome. Allergy 2024; 79:1844-1857. [PMID: 38798015 DOI: 10.1111/all.16148] [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: 12/06/2023] [Revised: 03/25/2024] [Accepted: 04/14/2024] [Indexed: 05/29/2024]
Abstract
BACKGROUND The rise in asthma has been linked to different environmental and lifestyle factors including dietary habits. Whether dietary salt contributes to asthma incidence, remains controversial. We aimed to investigate the impact of higher salt intake on asthma incidence in humans and to evaluate underlying mechanisms using mouse models. METHODS Epidemiological research was conducted using the UK Biobank Resource. Data were obtained from 42,976 participants with a history of allergies. 24-h sodium excretion was estimated from spot urine, and its association with asthma incidence was assessed by Cox regression, adjusting for relevant covariates. For mechanistic studies, a mouse model of mite-induced allergic airway inflammation (AAI) fed with high-salt diet (HSD) or normal-salt chow was used to characterize disease development. The microbiome of lung and feces (as proxy for gut) was analyzed via 16S rRNA gene based metabarcoding approach. RESULTS In humans, urinary sodium excretion was directly associated with asthma incidence among females but not among males. HSD-fed female mice displayed an aggravated AAI characterized by increased levels of total IgE, a TH2-TH17-biased inflammatory cell infiltration accompanied by upregulation of osmosensitive stress genes. HSD induced distinct changes in serum short chain fatty acids and in both gut and lung microbiome, with a lower Bacteroidetes to Firmicutes ratio and decreased Lactobacillus relative abundance in the gut, and enriched members of Gammaproteobacteria in the lung. CONCLUSIONS High dietary salt consumption correlates with asthma incidence in female adults with a history of allergies. Female mice revealed HSD-induced T-cell lung profiles accompanied by alterations of gut and lung microbiome.
Collapse
Affiliation(s)
- Stephanie Musiol
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- Member of the German Center of Lung Research (DZL), Munich, Germany
| | - Carla P Harris
- Institute of Epidemiology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- Dr. von Hauner Children's Hospital, University Hospital, LMU of Munich, Munich, Germany
| | - Silvia Gschwendtner
- Research Unit for Comparative Microbiome Analysis, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Amy Burrell
- Department of Infection Immunology, Leibniz Institute for Natural Product Research & Infection Biology, Hans-Knöll-Institute, Jena, Germany
- Institute of Microbiology, Faculty of Biological Sciences, Friedrich Schiller University, Jena, Germany
| | - Yacine Amar
- Department of Dermatology and Allergy, School of Medicine, Technical University of Munich (TUM), Munich, Germany
| | - Benjamin Schnautz
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- Member of the German Center of Lung Research (DZL), Munich, Germany
| | - Dennis Renisch
- Department of Chemistry - TRIGA site, Johannes Gutenberg University Mainz, Mainz, Germany
| | - Sonja C Braun
- Institute of Epidemiology, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- Chair of Epidemiology, Faculty of Medicine, LMU of Munich, Munich, Germany
| | - Stefan Haak
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Michael Schloter
- Research Unit for Comparative Microbiome Analysis, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Carsten B Schmidt-Weber
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- Member of the German Center of Lung Research (DZL), Munich, Germany
| | - Christina E Zielinski
- Department of Infection Immunology, Leibniz Institute for Natural Product Research & Infection Biology, Hans-Knöll-Institute, Jena, Germany
- Institute of Microbiology, Faculty of Biological Sciences, Friedrich Schiller University, Jena, Germany
- Center for Translational Cancer Research & Institute of Virology, Technical University of Munich, Munich, Germany
| | - Francesca Alessandrini
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- Member of the German Center of Lung Research (DZL), Munich, Germany
| |
Collapse
|
5
|
Choi S, Yang S, Kim JW, Kwon K, Oh SW, Yu E, Han SB, Kang SH, Lee JH, Ha H, Yoo JK, Kim SY, Kim YS, Cho JY, Lee J. Anti-pollutant effect of oleic acid against urban particulate matter is mediated via regulation of AhR- and TRPV1-mediated signaling in vitro. ENVIRONMENTAL TOXICOLOGY 2024; 39:3500-3511. [PMID: 38456238 DOI: 10.1002/tox.24183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 11/11/2023] [Accepted: 02/25/2024] [Indexed: 03/09/2024]
Abstract
Urban Particulate Matter (UPM) induces skin aging and inflammatory responses by regulating skin cells through the transient receptor potential vanilloid 1 (TRPV1). Although oleic acid, an unsaturated free fatty acid (FFA), has some functional activities, its effect on UPM-induced skin damage has not been elucidated. Here, we investigated signaling pathways on how oleic acid is involved in attenuating UPM induced cell damage. UPM treatment increased XRE-promoter luciferase activity and increased translocation of AhR to the nucleus, resulting in the upregulation of CYP1A1 gene. However, oleic acid treatment attenuated the UPM effects on AhR signaling. Furthermore, while UPM induced activation of TRPV1 and MAPKs signaling which activated the downstream molecules NFκB and AP-1, these effects were reduced by cotreatment with oleic acid. UPM-dependent generation of reactive oxygen species (ROS) and reduction of cellular proliferation were also attenuated by the treatment of oleic acid. These data reveal that cell damage induced by UPM treatment occurs through AhR signaling and TRPV1 activation which in turn activates ERK and JNK, ultimately inducing NFκB and AP-1 activation. These effects were reduced by the cotreatment of oleic acid on HaCaT cells. These suggest that oleic acid reduces UPM-induced cell damage through inhibiting both the AhR signaling and activation of TRPV1 and its downstream molecules, leading to a reduction of pro-inflammatory cytokine and recovery of cell proliferation.
Collapse
Affiliation(s)
- Seoyoung Choi
- Department of Integrative Biotechnology, Molecular Dermatology Laboratory, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do, Korea
| | - Seyoung Yang
- Department of Integrative Biotechnology, Molecular Dermatology Laboratory, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do, Korea
| | - Ji Woong Kim
- Materials Science Research Institute, LABIO, Inc., Seoul, Korea
| | - Kitae Kwon
- Department of Integrative Biotechnology, Molecular Dermatology Laboratory, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do, Korea
| | - Sae Woong Oh
- Department of Integrative Biotechnology, Molecular Dermatology Laboratory, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do, Korea
| | - Eunbi Yu
- Department of Integrative Biotechnology, Molecular Dermatology Laboratory, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do, Korea
| | - Su Bin Han
- Department of Integrative Biotechnology, Molecular Dermatology Laboratory, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do, Korea
| | - Soo Hyun Kang
- Department of Integrative Biotechnology, Molecular Dermatology Laboratory, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do, Korea
| | - Jung Hyun Lee
- Department of Integrative Biotechnology, Molecular Dermatology Laboratory, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do, Korea
| | - Heejun Ha
- Department of Integrative Biotechnology, Molecular Dermatology Laboratory, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do, Korea
| | - Jeong Kyun Yoo
- Materials Science Research Institute, LABIO, Inc., Seoul, Korea
| | - Su Young Kim
- Materials Science Research Institute, LABIO, Inc., Seoul, Korea
| | - Young Soo Kim
- Materials Science Research Institute, LABIO, Inc., Seoul, Korea
| | - Jae Youl Cho
- Department of Integrative Biotechnology, Molecular Immunology Laboratory, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do, Korea
| | - Jongsung Lee
- Department of Integrative Biotechnology, Molecular Dermatology Laboratory, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, Gyunggi Do, Korea
| |
Collapse
|
6
|
Hrvat A, Benders S, Kimmig R, Brandau S, Mallmann-Gottschalk N. Immunoglobulins and serum proteins impair anti-tumor NK cell effector functions in malignant ascites. Front Immunol 2024; 15:1360615. [PMID: 38646521 PMCID: PMC11026578 DOI: 10.3389/fimmu.2024.1360615] [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: 12/23/2023] [Accepted: 03/20/2024] [Indexed: 04/23/2024] Open
Abstract
Introduction Malignant ascites indicates ovarian cancer progression and predicts poor clinical outcome. Various ascites components induce an immunosuppressive crosstalk between tumor and immune cells, which is poorly understood. In our previous study, imbalanced electrolytes, particularly high sodium content in malignant ascites, have been identified as a main immunosuppressive mechanism that impaired NK and T-cell activity. Methods In the present study, we explored the role of high concentrations of ascites proteins and immunoglobulins on antitumoral NK effector functions. To this end, a coculture system consisting of healthy donor NK cells and ovarian cancer cells was used. The anti-EGFR antibody Cetuximab was added to induce antibody-dependent cellular cytotoxicity (ADCC). NK activity was assessed in the presence of different patient ascites samples and immunoglobulins that were isolated from ascites. Results Overall high protein concentration in ascites impaired NK cell degranulation, conjugation to tumor cells, and intracellular calcium signaling. Immunoglobulins isolated from ascites samples competitively interfered with NK ADCC and inhibited the conjugation to target cells. Furthermore, downregulation of regulatory surface markers CD16 and DNAM-1 on NK cells was prevented by ascites-derived immunoglobulins during NK cell activation. Conclusion Our data show that high protein concentrations in biological fluids are able to suppress antitumoral activity of NK cells independent from the mechanism mediated by imbalanced electrolytes. The competitive interference between immunoglobulins of ascites and specific therapeutic antibodies could diminish the efficacy of antibody-based therapies and should be considered in antibody-based immunotherapies.
Collapse
Affiliation(s)
- Antonio Hrvat
- Experimental and Translational Research, Department of Otorhinolaryngology, University Hospital Essen, Essen, Germany
| | - Sonja Benders
- Experimental and Translational Research, Department of Otorhinolaryngology, University Hospital Essen, Essen, Germany
- Department for Trauma Surgery and Orthopedics, St. Joseph Hospital Kupferdreh, Essen, Germany
| | - Rainer Kimmig
- Department of Gynecology and Obstetrics, University Hospital Essen, Essen, Germany
| | - Sven Brandau
- Experimental and Translational Research, Department of Otorhinolaryngology, University Hospital Essen, Essen, Germany
- German Cancer Consortium, Partner Site Essen-Düsseldorf, Essen, Germany
| | - Nina Mallmann-Gottschalk
- Experimental and Translational Research, Department of Otorhinolaryngology, University Hospital Essen, Essen, Germany
- Department of Gynecology and Obstetrics, University Hospital Cologne, Cologne, Germany
| |
Collapse
|
7
|
Ciou JJ, Chien MW, Hsu CY, Liu YW, Dong JL, Tsai SY, Yang SS, Lin SH, Yen BLJ, Fu SH, Sytwu HK. Excess Salt Intake Activates IL-21-Dominant Autoimmune Diabetogenesis via a Salt-Regulated Ste20-Related Proline/Alanine-Rich Kinase in CD4 T Cells. Diabetes 2024; 73:592-603. [PMID: 38241027 PMCID: PMC11031440 DOI: 10.2337/db23-0599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Accepted: 12/19/2023] [Indexed: 03/22/2024]
Abstract
The fundamental mechanisms by which a diet affects susceptibility to or modifies autoimmune diseases are poorly understood. Excess dietary salt intake acts as a risk factor for autoimmune diseases; however, little information exists on the impact of salt intake on type 1 diabetes. To elucidate the potential effect of high salt intake on autoimmune diabetes, nonobese diabetic (NOD) mice were fed a high-salt diet (HSD) or a normal-salt diet (NSD) from 6 to 12 weeks of age and monitored for diabetes development. Our results revealed that the HSD accelerated diabetes progression with more severe insulitis in NOD mice in a CD4+ T-cell-autonomous manner when compared with the NSD group. Moreover, expression of IL-21 and SPAK in splenic CD4+ T cells from HSD-fed mice was significantly upregulated. Accordingly, we generated T-cell-specific SPAK knockout (CKO) NOD mice and demonstrated that SPAK deficiency in T cells significantly attenuated diabetes development in NOD mice by downregulating IL-21 expression in CD4+ T cells. Furthermore, HSD-triggered diabetes acceleration was abolished in HSD-fed SPAK CKO mice when compared with HSD-fed NOD mice, suggesting an essential role of SPAK in salt-exacerbated T-cell pathogenicity. Finally, pharmacological inhibition of SPAK activity using a specific SPAK inhibitor (closantel) in NOD mice ameliorated diabetogenesis, further illuminating the potential of a SPAK-targeting immunotherapeutic approach for autoimmune diabetes. Here, we illustrate that a substantial association between salt sensitivity and the functional impact of SPAK on T-cell pathogenicity is a central player linking high-salt-intake influences to immunopathophysiology of diabetogenesis in NOD mice. ARTICLE HIGHLIGHTS
Collapse
Affiliation(s)
- Jing-Jie Ciou
- National Institute of Infectious Disease and Vaccinology, National Health Research Institutes, Miaoli County, Taiwan
- Department and Graduate Institute of Microbiology and Immunology, National Defense Medical Center, Taipei, Taiwan
- Institute of Molecular and Genomic Medicine, National Health Research Institutes, Miaoli County, Taiwan
| | - Ming-Wei Chien
- National Institute of Infectious Disease and Vaccinology, National Health Research Institutes, Miaoli County, Taiwan
- Department and Graduate Institute of Microbiology and Immunology, National Defense Medical Center, Taipei, Taiwan
| | - Chao-Yuan Hsu
- Department and Graduate Institute of Microbiology and Immunology, National Defense Medical Center, Taipei, Taiwan
| | - Yu-Wen Liu
- National Institute of Infectious Disease and Vaccinology, National Health Research Institutes, Miaoli County, Taiwan
| | - Jia-Ling Dong
- National Institute of Infectious Disease and Vaccinology, National Health Research Institutes, Miaoli County, Taiwan
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan
| | - Shin-Ying Tsai
- Department and Graduate Institute of Microbiology and Immunology, National Defense Medical Center, Taipei, Taiwan
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan
| | - Sung-Sen Yang
- Division of Nephrology, Department of Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Shih-Hua Lin
- Division of Nephrology, Department of Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - B. Lin-Ju Yen
- Institute of Cellular and System Medicine, National Health Research Institutes, Miaoli County, Taiwan
| | - Shin-Huei Fu
- National Institute of Infectious Disease and Vaccinology, National Health Research Institutes, Miaoli County, Taiwan
- Department and Graduate Institute of Microbiology and Immunology, National Defense Medical Center, Taipei, Taiwan
| | - Huey-Kang Sytwu
- National Institute of Infectious Disease and Vaccinology, National Health Research Institutes, Miaoli County, Taiwan
- Department and Graduate Institute of Microbiology and Immunology, National Defense Medical Center, Taipei, Taiwan
| |
Collapse
|
8
|
Miyauchi H, Geisberger S, Luft FC, Wilck N, Stegbauer J, Wiig H, Dechend R, Jantsch J, Kleinewietfeld M, Kempa S, Müller DN. Sodium as an Important Regulator of Immunometabolism. Hypertension 2024; 81:426-435. [PMID: 37675565 PMCID: PMC10863658 DOI: 10.1161/hypertensionaha.123.19489] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
Salt sensitivity concerns blood pressure alterations after a change in salt intake (sodium chloride). The heart is a pump, and vessels are tubes; sodium can affect both. A high salt intake increases cardiac output, promotes vascular dysfunction and capillary rarefaction, and chronically leads to increased systemic vascular resistance. More recent findings suggest that sodium also acts as an important second messenger regulating energy metabolism and cellular functions. Besides endothelial cells and fibroblasts, sodium also affects innate and adaptive immunometabolism, immune cell function, and influences certain microbes and microbiota-derived metabolites. We propose the idea that the definition of salt sensitivity should be expanded beyond high blood pressure to cellular and molecular salt sensitivity.
Collapse
Affiliation(s)
- Hidetaka Miyauchi
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.M., S.G., F.C.L., N.W., R.D., S.K., D.N.M.)
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Experimental and Clinical Research Center, Germany (H.M., F.C.L., N.W., R.D., D.N.M.)
- Experimental and Clinical Research Center, a joint cooperation of Max Delbrück Center for Molecular Medicine and Charité-Universitätsmedizin Berlin, Germany (H.M., F.C.L., N.W., R.D., D.N.M.)
- German Centre for Cardiovascular Research, Partner Site Berlin, Germany (H.M., N.W., R.D., D.N.M.)
| | - Sabrina Geisberger
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.M., S.G., F.C.L., N.W., R.D., S.K., D.N.M.)
| | - Friedrich C. Luft
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.M., S.G., F.C.L., N.W., R.D., S.K., D.N.M.)
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Experimental and Clinical Research Center, Germany (H.M., F.C.L., N.W., R.D., D.N.M.)
- Experimental and Clinical Research Center, a joint cooperation of Max Delbrück Center for Molecular Medicine and Charité-Universitätsmedizin Berlin, Germany (H.M., F.C.L., N.W., R.D., D.N.M.)
| | - Nicola Wilck
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.M., S.G., F.C.L., N.W., R.D., S.K., D.N.M.)
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Experimental and Clinical Research Center, Germany (H.M., F.C.L., N.W., R.D., D.N.M.)
- Experimental and Clinical Research Center, a joint cooperation of Max Delbrück Center for Molecular Medicine and Charité-Universitätsmedizin Berlin, Germany (H.M., F.C.L., N.W., R.D., D.N.M.)
- German Centre for Cardiovascular Research, Partner Site Berlin, Germany (H.M., N.W., R.D., D.N.M.)
| | - Johannes Stegbauer
- Department of Nephrology, Faculty of Medicine, University Hospital, Heinrich-Heine-University, Düsseldorf, Germany (J.S.)
- CARID, Cardiovascular Research Institute Düsseldorf, Medical Faculty and University Hospital, Düsseldorf, Germany (J.S.)
| | - Helge Wiig
- Department of Biomedicine, University of Bergen, Norway (H.W.)
| | - Ralf Dechend
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.M., S.G., F.C.L., N.W., R.D., S.K., D.N.M.)
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Experimental and Clinical Research Center, Germany (H.M., F.C.L., N.W., R.D., D.N.M.)
- Experimental and Clinical Research Center, a joint cooperation of Max Delbrück Center for Molecular Medicine and Charité-Universitätsmedizin Berlin, Germany (H.M., F.C.L., N.W., R.D., D.N.M.)
- German Centre for Cardiovascular Research, Partner Site Berlin, Germany (H.M., N.W., R.D., D.N.M.)
- HELIOS Clinic, Department of Cardiology and Nephrology, Berlin, Germany (R.D.)
| | - Jonathan Jantsch
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg and University of Regensburg, Germany (J.J.)
- Institute for Medical Microbiology, Immunology, and Hygiene, and Center for Molecular Medicine Cologne, University Hospital Cologne and Faculty of Medicine, University of Cologne, Germany (J.J.)
| | - Markus Kleinewietfeld
- VIB Laboratory of Translational Immunomodulation, VIB Center for Inflammation Research, Hasselt University, Diepenbeek, Belgium (M.K.)
- Department of Immunology, Biomedical Research Institute, Hasselt University, Diepenbeek, Belgium (M.K.)
- University Multiple Sclerosis Center, Hasselt University/Campus Diepenbeek, Belgium (M.K.)
| | - Stefan Kempa
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.M., S.G., F.C.L., N.W., R.D., S.K., D.N.M.)
| | - Dominik N. Müller
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany (H.M., S.G., F.C.L., N.W., R.D., S.K., D.N.M.)
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Experimental and Clinical Research Center, Germany (H.M., F.C.L., N.W., R.D., D.N.M.)
- Experimental and Clinical Research Center, a joint cooperation of Max Delbrück Center for Molecular Medicine and Charité-Universitätsmedizin Berlin, Germany (H.M., F.C.L., N.W., R.D., D.N.M.)
- German Centre for Cardiovascular Research, Partner Site Berlin, Germany (H.M., N.W., R.D., D.N.M.)
| |
Collapse
|
9
|
Krampert L, Ossner T, Schröder A, Schatz V, Jantsch J. Simultaneous Increases in Intracellular Sodium and Tonicity Boost Antimicrobial Activity of Macrophages. Cells 2023; 12:2816. [PMID: 38132136 PMCID: PMC10741518 DOI: 10.3390/cells12242816] [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: 08/31/2023] [Revised: 11/27/2023] [Accepted: 12/05/2023] [Indexed: 12/23/2023] Open
Abstract
Inflamed and infected tissues can display increased local sodium (Na+) levels, which can have various effects on immune cells. In macrophages, high salt (HS) leads to a Na+/Ca2+-exchanger 1 (NCX1)-dependent increase in intracellular Na+ levels. This results in augmented osmoprotective signaling and enhanced proinflammatory activation, such as enhanced expression of type 2 nitric oxide synthase and antimicrobial function. In this study, the role of elevated intracellular Na+ levels in macrophages was investigated. Therefore, the Na+/K+-ATPase (NKA) was pharmacologically inhibited with two cardiac glycosides (CGs), ouabain (OUA) and digoxin (DIG), to raise intracellular Na+ without increasing extracellular Na+ levels. Exposure to HS conditions and treatment with both inhibitors resulted in intracellular Na+ accumulation and subsequent phosphorylation of p38/MAPK. The CGs had different effects on intracellular Ca2+ and K+ compared to HS stimulation. Moreover, the osmoprotective transcription factor nuclear factor of activated T cells 5 (NFAT5) was not upregulated on RNA and protein levels upon OUA and DIG treatment. Accordingly, OUA and DIG did not boost nitric oxide (NO) production and showed heterogeneous effects toward eliminating intracellular bacteria. While HS environments cause hypertonic stress and ionic perturbations, cardiac glycosides only induce the latter. Cotreatment of macrophages with OUA and non-ionic osmolyte mannitol (MAN) partially mimicked the HS-boosted antimicrobial macrophage activity. These findings suggest that intracellular Na+ accumulation and hypertonic stress are required but not sufficient to mimic boosted macrophage function induced by increased extracellular sodium availability.
Collapse
Affiliation(s)
- Luka Krampert
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg and University of Regensburg, 93053 Regensburg, Germany; (L.K.)
| | - Thomas Ossner
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg and University of Regensburg, 93053 Regensburg, Germany; (L.K.)
| | - Agnes Schröder
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg and University of Regensburg, 93053 Regensburg, Germany; (L.K.)
- Institute of Orthodontics, University Hospital Regensburg and University of Regensburg, 93053 Regensburg, Germany
| | - Valentin Schatz
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg and University of Regensburg, 93053 Regensburg, Germany; (L.K.)
| | - Jonathan Jantsch
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg and University of Regensburg, 93053 Regensburg, Germany; (L.K.)
- Institute for Medical Microbiology, Immunology, and Hygiene, Center for Molecular Medicine Cologne (CMMC), University Hospital Cologne and Faculty of Medicine, University of Cologne, 50935 Cologne, Germany
| |
Collapse
|
10
|
Zielinski CE. T helper cell subsets: diversification of the field. Eur J Immunol 2023; 53:e2250218. [PMID: 36792132 DOI: 10.1002/eji.202250218] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 02/14/2023] [Accepted: 02/14/2023] [Indexed: 02/17/2023]
Abstract
Polarized T helper cell (Th cell) responses are important determinants of host protection. Th cell subsets tailor their functional repertoire of cytokines to their cognate antigens to efficiently contribute to their clearance. In contrast, in settings of immune abrogation, these polarized cytokine patterns of Th cells can mediate tissue damage and pathology resulting in allergy or autoimmunity. Recent technological developments in single-cell genomics and proteomics as well as advances in the high-dimensional bioinformatic analysis of complex datasets have challenged the prevailing Th cell subset classification into Th1, Th2, Th17, and other subsets. Additionally, systems immunology approaches have revealed that instructive input from the peripheral tissue microenvironment can have differential effects on the overall phenotype and molecular wiring of Th cells depending on their spatial distribution. Th cells from the blood or secondary lymphoid organs are therefore expected to follow distinct rules of regulation. In this review, the functional heterogeneity of Th cell subsets will be reviewed in the context of new technological developments and T-cell compartmentalization in tissue niches. This work will especially focus on challenges to the traditional boundaries of Th cell subsets and will discuss the underlying regulatory checkpoints, which could reveal new therapeutic strategies for various immune-mediated diseases.
Collapse
Affiliation(s)
- Christina E Zielinski
- Department of Infection Immunology, Leibniz Institute for Natural Products Research and Infection Biology, Jena, Germany
- Institute of Microbiology, Faculty of Biosciences, Friedrich Schiller University, Jena, Germany
| |
Collapse
|
11
|
Afsar B, Afsar RE. Salt Behind the Scenes of Systemic Lupus Erythematosus and Rheumatoid Arthritis. Curr Nutr Rep 2023; 12:830-844. [PMID: 37980312 DOI: 10.1007/s13668-023-00509-5] [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] [Accepted: 11/09/2023] [Indexed: 11/20/2023]
Abstract
PURPOSE OF REVIEW Sodium is vital for human health. High salt intake is a global health problem and is associated with cardiovascular morbidity and mortality. Recent evidence suggests that both innate and adaptive immune systems are affected by sodium. In general, excess salt intake drives immune cells toward a pro-inflammatory phenotype. The incidence of autoimmune diseases, including systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA), is steadily increasing. As excess salt induces a pro-inflammatory state, increased salt intake may have impacts on autoimmune diseases. The relationship between salt intake and autoimmune diseases is most widely studied in patients with SLE or RA. This review aimed to summarize the relationship between salt intake and SLE and RA. RECENT FINDINGS Most, but not all, of these studies showed that high salt intake might promote SLE by M1 macrophage shift, increase in Th17/Treg cell ratio, activation of dendritic and follicular helper T cells, and increased secretion of pro-inflammatory cytokines. In RA, apart from driving immune cells toward a pro-inflammatory state, high salt intake also influences cellular signaling pathways, including receptor activator of nuclear factor κB ligand (RANKL), Rho GTPases, and MAPK (mitogen-activated protein kinase). There is now sufficient evidence that excess salt intake may be related to the development and progression of SLE and RA, although there are still knowledge gaps. More studies are warranted to further highlight the relationship between excess salt intake, SLE, and RA. Salt intake may affect cell types and pro-inflammatory cytokines and signaling pathways associated with the development and progression of systemic lupus erythematosus and rheumatoid arthritis. Bcl-6 B-cell lymphoma, 6 Erk extracellular signal-regulated kinases, IFN-γ interferon-gamma, JNK c-Jun N-terminal kinase, IL-4 interleukin 4, IL-6 interleukin 6, MAPK mitogen-activated protein kinase, STAT signal transducer and activator of transcription, Tnf-α tumor necrosis factor, Treg T regulatory cell.
Collapse
Affiliation(s)
- Baris Afsar
- Department of Nephrology, School of Medicine, Suleyman Demirel University, Isparta, 32260, Turkey.
| | - Rengin Elsurer Afsar
- Department of Nephrology, School of Medicine, Suleyman Demirel University, Isparta, 32260, Turkey
| |
Collapse
|
12
|
Lim JJ, Reginald K, Say YH, Liu MH, Chew FT. A dietary pattern of frequent plant-based foods intake reduced the associated risks for atopic dermatitis exacerbation: Insights from the Singapore/Malaysia cross-sectional genetics epidemiology cohort. BMC Public Health 2023; 23:1818. [PMID: 37726698 PMCID: PMC10508008 DOI: 10.1186/s12889-023-16736-y] [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: 06/14/2023] [Accepted: 09/11/2023] [Indexed: 09/21/2023] Open
Abstract
BACKGROUND The prevalence of atopic dermatitis (AD) has been increasing in recent years, especially in Asia. There is growing evidence to suggest the importance of dietary patterns in the development and management of AD. Here, we seek to understand how certain dietary patterns in a Singapore/Malaysia population are associated with various risks of AD development and exacerbation. METHODS A standardized questionnaire following the International Study of Asthma and Allergies in Childhood (ISAAC) guidelines was investigator-administered to a clinically and epidemiology well-defined allergic cohort of 13,561 young Chinese adults aged 19-22. Information on their sociodemographic, lifestyle, dietary habits, and personal and family medical atopic histories were obtained. Allergic sensitization was assessed by a skin prick test to mite allergens. Spearman's rank-order correlation was used to assess the correlation between the intake frequencies of 16 food types. Dietary patterns were identified using principal component analysis. Four corresponding dietary scores were derived to examine the association of identified dietary patterns with allergic sensitization and AD exacerbations through a multivariable logistic regression that controlled for age, gender, parental eczema, BMI, and lifestyle factors. RESULTS The correlation is the strongest between the intake of butter and margarine (R = 0.65). We identified four dietary patterns, "high-calorie foods", "plant-based foods", "meat and rice", and "probiotics, milk and eggs", and these accounted for 47.4% of the variance in the dietary habits among the subjects. Among these patterns, moderate-to-high intake of "plant-based foods" conferred a negative association for chronic (Adjusted odds ratio (AOR): 0.706; 95% confidence interval (CI): 0.589-0.847; p < 0.001) and moderate-to-severe AD (AOR: 0.756; 95% CI: 0.638-0.897; p < 0.01). "Meat and rice" and "probiotics, milk and eggs" were not significantly associated with AD exacerbation. While frequent adherence to "high-calorie foods" increased the associated risks for ever AD and moderate-to-severe AD, having a higher adherence to "plant-based foods" diminished the overall associated risks. CONCLUSIONS Frequent adherence to "plant-based foods" was associated with reduced risks for AD exacerbation in young Chinese adults from Singapore/Malaysia. This provides the initial evidence to support the association between dietary factors and AD. Further research is needed to better understand the pathomechanisms underlying diet and AD exacerbations.
Collapse
Affiliation(s)
- Jun Jie Lim
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore, 117543 Singapore
| | - Kavita Reginald
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore, 117543 Singapore
- Department of Biological Sciences, School of Medicine and Life Sciences, Sunway University, 47500 Petaling Jaya, Selangor, Malaysia
| | - Yee-How Say
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore, 117543 Singapore
- Department of Biological Sciences, School of Medicine and Life Sciences, Sunway University, 47500 Petaling Jaya, Selangor, Malaysia
- Department of Biomedical Science, Faculty of Science, Universiti Tunku Abdul Rahman (UTAR), 31900 Kampar, Perak, Malaysia
| | - Mei Hui Liu
- Department of Food Science & Technology, Faculty of Science, National University of Singapore, Singapore, 117543 Singapore
| | - Fook Tim Chew
- Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore, 117543 Singapore
| |
Collapse
|
13
|
Sänger CS, Cernakova M, Wietecha MS, Garau Paganella L, Labouesse C, Dudaryeva OY, Roubaty C, Stumpe M, Mazza E, Tibbitt MW, Dengjel J, Werner S. Serine protease 35 regulates the fibroblast matrisome in response to hyperosmotic stress. SCIENCE ADVANCES 2023; 9:eadh9219. [PMID: 37647410 PMCID: PMC10468140 DOI: 10.1126/sciadv.adh9219] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 07/28/2023] [Indexed: 09/01/2023]
Abstract
Hyperosmotic stress occurs in several diseases, but its long-term effects are largely unknown. We used sorbitol-treated human fibroblasts in 3D culture to study the consequences of hyperosmotic stress in the skin. Sorbitol regulated many genes, which help cells cope with the stress condition. The most robustly regulated gene encodes serine protease 35 (PRSS35). Its regulation by hyperosmotic stress was dependent on the kinases p38 and JNK and the transcription factors NFAT5 and ATF2. We identified different collagens and collagen-associated proteins as putative PRSS35 binding partners. This is functionally important because PRSS35 affected the extracellular matrix proteome, which limited cell proliferation. The in vivo relevance of these findings is reflected by the coexpression of PRSS35 and its binding partners in human skin wounds, where hyperosmotic stress occurs as a consequence of excessive water loss. These results identify PRSS35 as a key regulator of the matrisome under hyperosmotic stress conditions.
Collapse
Affiliation(s)
- Catharina S. Sänger
- Institute of Molecular Health Sciences, Department of Biology, ETH Zurich, Otto-Stern-Weg 7, 8093 Zurich, Switzerland
| | - Martina Cernakova
- Institute of Molecular Health Sciences, Department of Biology, ETH Zurich, Otto-Stern-Weg 7, 8093 Zurich, Switzerland
| | - Mateusz S. Wietecha
- Institute of Molecular Health Sciences, Department of Biology, ETH Zurich, Otto-Stern-Weg 7, 8093 Zurich, Switzerland
- Department of Oral Biology, College of Dentistry, University of Illinois Chicago, Chicago, IL 60612, USA
| | - Lorenza Garau Paganella
- Institute for Mechanical Systems, Department of Mechanical and Process Engineering, ETH Zurich, Leonhardstrasse 21, 8092 Zurich, Switzerland
- Institute for Energy and Process Engineering, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, 8092 Zurich, Switzerland
| | - Céline Labouesse
- Institute for Energy and Process Engineering, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, 8092 Zurich, Switzerland
| | - Oksana Y. Dudaryeva
- Institute for Energy and Process Engineering, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, 8092 Zurich, Switzerland
| | - Carole Roubaty
- Faculty of Science and Medicine, Department of Biology, University of Fribourg, Ch. du Musée 10, 1700 Fribourg, Switzerland
| | - Michael Stumpe
- Faculty of Science and Medicine, Department of Biology, University of Fribourg, Ch. du Musée 10, 1700 Fribourg, Switzerland
| | - Edoardo Mazza
- Institute for Mechanical Systems, Department of Mechanical and Process Engineering, ETH Zurich, Leonhardstrasse 21, 8092 Zurich, Switzerland
| | - Mark W. Tibbitt
- Institute for Energy and Process Engineering, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, 8092 Zurich, Switzerland
| | - Jörn Dengjel
- Faculty of Science and Medicine, Department of Biology, University of Fribourg, Ch. du Musée 10, 1700 Fribourg, Switzerland
| | - Sabine Werner
- Institute of Molecular Health Sciences, Department of Biology, ETH Zurich, Otto-Stern-Weg 7, 8093 Zurich, Switzerland
| |
Collapse
|
14
|
Chattopadhyay A, Tully J, Shan J, Sheikh S, Ohliger M, Gordon JW, Mauro T, Abuabara K. Sodium in the skin: a summary of the physiology and a scoping review of disease associations. Clin Exp Dermatol 2023; 48:733-743. [PMID: 36970766 DOI: 10.1093/ced/llad080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 02/16/2023] [Indexed: 07/20/2023]
Abstract
A large and growing body of research suggests that the skin plays an important role in regulating total body sodium, challenging traditional models of sodium homeostasis that focused exclusively on blood pressure and the kidney. In addition, skin sodium may help to prevent water loss and facilitate macrophage-driven antimicrobial host defence, but may also trigger immune dysregulation via upregulation of proinflammatory markers and downregulation of anti-inflammatory processes. We performed a systematic search of PubMed for published literature on skin sodium and disease outcomes and found that skin sodium concentration is increased in patients with cardiometabolic conditions including hypertension, diabetes and end-stage renal disease; autoimmune conditions including multiple sclerosis and systemic sclerosis; and dermatological conditions including atopic dermatitis, psoriasis and lipoedema. Several patient characteristics are associated with increased skin sodium concentration including older age and male sex. Animal evidence suggests that increased salt intake results in higher skin sodium levels; however, there are conflicting results from small trials in humans. Additionally, limited data suggest that pharmaceuticals such as diuretics and sodium-glucose co-transporter-2 inhibitors approved for diabetes, as well as haemodialysis may reduce skin sodium levels. In summary, emerging research supports an important role for skin sodium in physiological processes related to osmoregulation and immunity. With the advent of new noninvasive magnetic resonance imaging measurement techniques and continued research on skin sodium, it may emerge as a marker of immune-mediated disease activity or a potential therapeutic target.
Collapse
Affiliation(s)
- Aheli Chattopadhyay
- Department of Dermatology, University of California San Francisco, San Francisco, CA, USA
| | - Janell Tully
- University of Arizona College of Medicine - Phoenix, Phoenix, AZ, USA
| | - Judy Shan
- Department of Dermatology, University of California San Francisco, San Francisco, CA, USA
| | - Sidra Sheikh
- Kaiser Permanente, Department of Physical Medicine & Rehabilitation, Oakland, CA, USA
| | - Michael Ohliger
- Department of Radiology & Biomedical Imaging, University of California San Francisco, San Francisco, CA, USA
| | - Jeremy W Gordon
- Department of Radiology & Biomedical Imaging, University of California San Francisco, San Francisco, CA, USA
| | - Theodora Mauro
- Department of Dermatology, University of California San Francisco, San Francisco, CA, USA
- Dermatology Service, Veterans Affairs Health Care System, San Francisco, CA, USA
| | - Katrina Abuabara
- Department of Dermatology, University of California San Francisco, San Francisco, CA, USA
| |
Collapse
|
15
|
Gina M, Wichert K, Kutz G, Brüning T, Fartasch M. Applying skin protective cream and the wearing of gloves?-A randomized controlled experimental study. Contact Dermatitis 2023; 88:372-382. [PMID: 36727715 DOI: 10.1111/cod.14287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 01/17/2023] [Accepted: 01/23/2023] [Indexed: 02/03/2023]
Abstract
BACKGROUND Glove occlusion might enhance skin sensitivity to a subsequent detergent challenge (occlusion effect). Thus, some skin protection creams (PC) claim to protect against this effect of occlusion, and are recommended to be used before wearing liquid-proof gloves. OBJECTIVES To evaluate the effect of PC applied prior to glove occlusion on the 'occlusion effect'-refers to increased susceptibility of the skin to a model detergent. METHODS One hundred and eleven volunteers were enrolled in a single-blind, randomized study. Seven PCs were applied before glove occlusion over 7 days (D1-D7). After sodium lauryl sulphate (SLS) challenge, we compared the irritation between the areas treated with PC and occlusion alone. Clinical scoring and bioengineering methods (capacitance, transepidermal water loss [TEWL], and colourimetry [erythema]) were used to quantify the irritant reactions. RESULTS After 1 week of occlusion and PC application, we did not observe significant changes in TEWL, nor in erythema, whereas skin hydration raised in three cream-treated areas. On day 10, after a challenge with SLS, some products significantly aggravated the skin irritation as compared to occlusion alone. CONCLUSIONS The 'occlusion effect'-shown as higher skin susceptibility to a model detergent-was not mitigated by PCs when applied prior to glove occlusion. On the contrary, some PCs might have negative effects on skin barrier function and augment such sensitivity.
Collapse
Affiliation(s)
- Michal Gina
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance (IPA), Institute of the Ruhr University Bochum, Bochum, Germany
| | - Katharina Wichert
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance (IPA), Institute of the Ruhr University Bochum, Bochum, Germany
| | - Gerald Kutz
- Department of Pharmaceutical Engineering, University of Applied Sciences and Arts Ostwestfalen-Lippe, Detmold, Germany
| | - Thomas Brüning
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance (IPA), Institute of the Ruhr University Bochum, Bochum, Germany
| | - Manigé Fartasch
- Institute for Prevention and Occupational Medicine of the German Social Accident Insurance (IPA), Institute of the Ruhr University Bochum, Bochum, Germany
| |
Collapse
|
16
|
Chao YY, Puhach A, Frieser D, Arunkumar M, Lehner L, Seeholzer T, Garcia-Lopez A, van der Wal M, Fibi-Smetana S, Dietschmann A, Sommermann T, Ćiković T, Taher L, Gresnigt MS, Vastert SJ, van Wijk F, Panagiotou G, Krappmann D, Groß O, Zielinski CE. Human T H17 cells engage gasdermin E pores to release IL-1α on NLRP3 inflammasome activation. Nat Immunol 2023; 24:295-308. [PMID: 36604548 PMCID: PMC9892007 DOI: 10.1038/s41590-022-01386-w] [Citation(s) in RCA: 29] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 11/04/2022] [Indexed: 01/07/2023]
Abstract
It has been shown that innate immune responses can adopt adaptive properties such as memory. Whether T cells utilize innate immune signaling pathways to diversify their repertoire of effector functions is unknown. Gasdermin E (GSDME) is a membrane pore-forming molecule that has been shown to execute pyroptotic cell death and thus to serve as a potential cancer checkpoint. In the present study, we show that human T cells express GSDME and, surprisingly, that this expression is associated with durable viability and repurposed for the release of the alarmin interleukin (IL)-1α. This property was restricted to a subset of human helper type 17 T cells with specificity for Candida albicans and regulated by a T cell-intrinsic NLRP3 inflammasome, and its engagement of a proteolytic cascade of successive caspase-8, caspase-3 and GSDME cleavage after T cell receptor stimulation and calcium-licensed calpain maturation of the pro-IL-1α form. Our results indicate that GSDME pore formation in T cells is a mechanism of unconventional cytokine release. This finding diversifies our understanding of the functional repertoire and mechanistic equipment of T cells and has implications for antifungal immunity.
Collapse
Affiliation(s)
- Ying-Yin Chao
- Department of Infection Immunology, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute, Jena, Germany.,Center for Translational Cancer Research & Institute of Virology, Technical University of Munich, Munich, Germany
| | - Alisa Puhach
- Department of Infection Immunology, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute, Jena, Germany
| | - David Frieser
- Center for Translational Cancer Research & Institute of Virology, Technical University of Munich, Munich, Germany
| | - Mahima Arunkumar
- Department of Infection Immunology, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute, Jena, Germany
| | - Laurens Lehner
- Department of Infection Immunology, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute, Jena, Germany
| | - Thomas Seeholzer
- Research Unit Cellular Signal Integration, Molecular Targets and Therapeutics Center, Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany
| | - Albert Garcia-Lopez
- Department of Systems Biology and Bioinformatics, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute, Jena, Germany
| | - Marlot van der Wal
- Center for Translational Immunology, University Medical Center Utrecht and Utrecht University, Utrecht, the Netherlands
| | - Silvia Fibi-Smetana
- Institute of Biomedical Informatics, Graz University of Technology, Graz, Austria
| | - Axel Dietschmann
- Adaptive Pathogenicity Strategies, Leibniz Institute for Natural Product Research and Infection Biology-Hans Knöll Institute, Jena, Germany
| | - Thomas Sommermann
- Department of Infection Immunology, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute, Jena, Germany
| | - Tamara Ćiković
- Institute of Neuropathology, Medical Center & Signalling Research Centres BIOSS and CIBSS & Center for Basics in NeuroModulation, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Leila Taher
- Institute of Biomedical Informatics, Graz University of Technology, Graz, Austria
| | - Mark S Gresnigt
- Adaptive Pathogenicity Strategies, Leibniz Institute for Natural Product Research and Infection Biology-Hans Knöll Institute, Jena, Germany
| | - Sebastiaan J Vastert
- Center for Translational Immunology, University Medical Center Utrecht and Utrecht University, Utrecht, the Netherlands
| | - Femke van Wijk
- Center for Translational Immunology, University Medical Center Utrecht and Utrecht University, Utrecht, the Netherlands
| | - Gianni Panagiotou
- Department of Systems Biology and Bioinformatics, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute, Jena, Germany
| | - Daniel Krappmann
- Research Unit Cellular Signal Integration, Molecular Targets and Therapeutics Center, Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany
| | - Olaf Groß
- Institute of Neuropathology, Medical Center & Signalling Research Centres BIOSS and CIBSS & Center for Basics in NeuroModulation, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Christina E Zielinski
- Department of Infection Immunology, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knöll-Institute, Jena, Germany. .,Center for Translational Cancer Research & Institute of Virology, Technical University of Munich, Munich, Germany. .,Institute of Microbiology, Faculty of Biological Sciences, Friedrich Schiller University, Jena, Germany. .,German Center for Infection Research, Munich, Germany. .,Department of Cellular Immunoregulation, Charité-Universitätsmedizin Berlin, Berlin, Germany.
| |
Collapse
|
17
|
Lizardo MP, Tavaria FK. Probiotic growth in skin-like conditions. AIMS Microbiol 2022; 8:388-402. [PMID: 36694578 PMCID: PMC9834086 DOI: 10.3934/microbiol.2022027] [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: 07/05/2022] [Revised: 10/19/2022] [Accepted: 10/24/2022] [Indexed: 11/07/2022] Open
Abstract
Although probiotics' main known effects are in the digestive system, over the last years several benefits that come from their topical use, have been investigated. Several studies have reported beneficial effects on different skin disorders, such as atopic dermatitis, acne, eczema, psoriasis, wound healing, skin aging and reactive skin. Their main action is assigned to the inhibition of skin colonization by pathogens. In this work, the growths of three probiotic strains were evaluated in the presence of abiotic factors similar to those found in skin, namely, UV radiation, temperature, pH, NaCl and fatty acids. Lactobacillus rhamnosus showed increased growth under the pH of 6, but no differences in its growth were found for the various NaCl concentrations tested. Lactobacillus delbrueckii increased the number of bacterial cells in 88.8% when grown in 10 mM NaCl concentration, while Propioniferax innocua showed increased growth at 45 °C. All tested probiotic bacteria were able to grow under skin-like conditions. However, L. rhamnosus was the probiotic that showed the best results. The results obtained in this study indicate that the used probiotics may be beneficial in the treatment of skin diseases, since they are able to successfully thrive in skin-like conditions.
Collapse
|
18
|
Sudden Infant Death Syndrome, Pulmonary Edema, and Sodium Toxicity: A Grounded Theory. Diseases 2022; 10:diseases10030059. [PMID: 36135215 PMCID: PMC9497894 DOI: 10.3390/diseases10030059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 08/27/2022] [Accepted: 08/27/2022] [Indexed: 11/20/2022] Open
Abstract
Sudden Infant Death Syndrome (SIDS) occurs unexpectedly in an otherwise healthy infant with no identifiable cause of death following a thorough investigation. A general hypervolemic state has been identified in SIDS, and fluid in the lungs suggests the involvement of pulmonary edema and hypoxia as the cause of death. The present perspective paper reviews pathophysiological, epidemiological, and dietary evidence in SIDS. A grounded theory is presented that proposes an association of SIDS with sodium toxicity from excessive sodium chloride intake, mediated by noncardiogenic pulmonary edema, hypoxia, and alveolar damage. The peak of SIDS cases occurs in infants 2–4 months of age, who are less efficient in excreting excessive dietary sodium load. Evidence implicating sodium toxicity in SIDS includes increased levels of sodium associated with fever and with inflammatory/immune responses in the lungs. Conditions in near-miss SIDS cases are linked to dysregulated sodium, and increased sodium dietary intake suggests that sodium toxicity from a high-salt diet potentially mediates the association of seasonality and socioeconomic status with SIDS incidence. In addition, exposure to sodium toxicity meets three main criteria of the triple risk model of SIDS. The proposed pathophysiological effects of pulmonary edema related to sodium toxicity in SIDS merit further investigations.
Collapse
|
19
|
An Overview of the Latest Metabolomics Studies on Atopic Eczema with New Directions for Study. Int J Mol Sci 2022; 23:ijms23158791. [PMID: 35955924 PMCID: PMC9368995 DOI: 10.3390/ijms23158791] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 08/01/2022] [Accepted: 08/03/2022] [Indexed: 12/21/2022] Open
Abstract
Atopic eczema (AE) is an inflammatory skin disorder affecting approximately 20% of children worldwide and early onset can lead to asthma and allergies. Currently, the mechanisms of the disease are not fully understood. Metabolomics, the analysis of small molecules in the skin produced by the host and microbes, opens a window to observe the mechanisms of the disease which then may lead to new drug targets for AE treatment. Here, we review the latest advances in AE metabolomics, highlighting both the lipid and non-lipid molecules, along with reviewing the metabolites currently known to reside in the skin.
Collapse
|
20
|
Brown RB. Low dietary sodium potentially mediates COVID-19 prevention associated with whole-food plant-based diets. Br J Nutr 2022; 129:1-6. [PMID: 35912674 PMCID: PMC10011594 DOI: 10.1017/s0007114522002252] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 06/11/2022] [Accepted: 07/12/2022] [Indexed: 11/07/2022]
Abstract
Compared with an omnivorous Western diet, plant-based diets containing mostly fruits, vegetables, grains, legumes, nuts and seeds, with restricted amounts of foods of animal origin, are associated with reduced risk and severity of COVID-19. Additionally, inflammatory immune responses and severe acute respiratory symptoms of COVID-19, including pulmonary oedema, shortness of breath, fever and nasopharyngeal infections, are associated with Na toxicity from excessive dietary Na. High dietary Na is also associated with increased risks of diseases and conditions that are co-morbid with COVID-19, including chronic kidney disease, hypertension, stroke, diabetes and obesity. This article presents evidence that low dietary Na potentially mediates the association of plant-based diets with COVID-19 prevention. Processed meats and poultry injected with sodium chloride contribute considerable amounts of dietary Na in the Western diet, and the avoidance or reduction of these and other processed foods in whole-food plant-based (WFPB) diets could help lower overall dietary Na intake. Moreover, high amounts of K in plant-based diets increase urinary Na excretion, and preagricultural diets high in plant-based foods were estimated to contain much lower ratios of dietary Na to K compared with modern diets. Further research should investigate low Na in WFPB diets for protection against COVID-19 and co-morbid conditions.
Collapse
Affiliation(s)
- Ronald B. Brown
- School of Public Health Sciences, University of Waterloo, Waterloo, ONN2L3G1, Canada
| |
Collapse
|
21
|
Krajina I, Stupin A, Šola M, Mihalj M. Oxidative Stress Induced by High Salt Diet—Possible Implications for Development and Clinical Manifestation of Cutaneous Inflammation and Endothelial Dysfunction in Psoriasis vulgaris. Antioxidants (Basel) 2022; 11:antiox11071269. [PMID: 35883760 PMCID: PMC9311978 DOI: 10.3390/antiox11071269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 06/19/2022] [Accepted: 06/23/2022] [Indexed: 02/07/2023] Open
Abstract
Although oxidative stress is recognized as an important effector mechanism of the immune system, uncontrolled formation of reactive oxygen and nitrogen species promotes excessive tissue damage and leads to disease development. In view of this, increased dietary salt intake has been found to damage redox systems in the vessel wall, resulting in endothelial dysfunction associated with NO uncoupling, inflammation, vascular wall remodeling and, eventually, atherosclerosis. Several studies have reported increased systemic oxidative stress accompanied by reduced antioxidant capacity following a high salt diet. In addition, vigorous ionic effects on the immune mechanisms, such as (trans)differentiation of T lymphocytes are emerging, which together with the evidence of NaCl accumulation in certain tissues warrants a re-examination of the data derived from in vitro research, in which the ionic influence was excluded. Psoriasis vulgaris (PV), as a primarily Th17-driven inflammatory skin disease with proven inflammation-induced accumulation of sodium chloride in the skin, merits our interest in the role of oxidative stress in the pathogenesis of PV, as well as in the possible beneficial effects that could be achieved through modulation of dietary salt intake and antioxidant supplementation.
Collapse
Affiliation(s)
- Ivana Krajina
- Department of Dermatology and Venereology, Osijek University Hospital, J. Huttlera 4, HR-31000 Osijek, Croatia;
- Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, J. Huttlera 4, HR-31000 Osijek, Croatia
| | - Ana Stupin
- Scientific Center of Excellence for Personalized Health Care, Josip Juraj Strossmayer University of Osijek, Trg Svetog Trojstva 3, HR-31000 Osijek, Croatia;
- Institute and Department of Physiology and Immunology, Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, J. Huttlera 4, HR-31000 Osijek, Croatia
| | - Marija Šola
- Department of Dermatology and Venereology, Osijek University Hospital, J. Huttlera 4, HR-31000 Osijek, Croatia;
- Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, J. Huttlera 4, HR-31000 Osijek, Croatia
- Correspondence: (M.Š.); (M.M.); Tel.: +385-31-512-800 (M.M.)
| | - Martina Mihalj
- Department of Dermatology and Venereology, Osijek University Hospital, J. Huttlera 4, HR-31000 Osijek, Croatia;
- Scientific Center of Excellence for Personalized Health Care, Josip Juraj Strossmayer University of Osijek, Trg Svetog Trojstva 3, HR-31000 Osijek, Croatia;
- Institute and Department of Physiology and Immunology, Faculty of Medicine, Josip Juraj Strossmayer University of Osijek, J. Huttlera 4, HR-31000 Osijek, Croatia
- Correspondence: (M.Š.); (M.M.); Tel.: +385-31-512-800 (M.M.)
| |
Collapse
|
22
|
Li X, Alu A, Wei Y, Wei X, Luo M. The modulatory effect of high salt on immune cells and related diseases. Cell Prolif 2022; 55:e13250. [PMID: 35747936 PMCID: PMC9436908 DOI: 10.1111/cpr.13250] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/20/2022] [Accepted: 04/22/2022] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND The adverse effect of excessive salt intake has been recognized in decades. Researchers have mainly focused on the association between salt intake and hypertension. However, studies in recent years have proposed the existence of extra-renal sodium storage and provided insight into the immunomodulatory function of sodium. OBJECTIVES In this review, we discuss the modulatory effects of high salt on various innate and adaptive immune cells and immune-regulated diseases. METHODS We identified papers through electronic searches of PubMed database from inception to March 2022. RESULTS An increasing body of evidence has demonstrated that high salt can modulate the differentiation, activation and function of multiple immune cells. Furthermore, a high-salt diet can increase tissue sodium concentrations and influence the immune responses in microenvironments, thereby affecting the development of immune-regulated diseases, including hypertension, multiple sclerosis, cancer and infections. These findings provide a novel mechanism for the pathology of certain diseases and indicate that salt might serve as a target or potential therapeutic agent in different disease contexts. CONCLUSION High salt has a profound impact on the differentiation, activation and function of multiple immune cells. Additionally, an HSD can modulate the development of various immune-regulated diseases.
Collapse
Affiliation(s)
- Xian Li
- Laboratory of Aging Research and Cancer Drug Target, State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Aqu Alu
- Laboratory of Aging Research and Cancer Drug Target, State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Yuquan Wei
- Laboratory of Aging Research and Cancer Drug Target, State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Xiawei Wei
- Laboratory of Aging Research and Cancer Drug Target, State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| | - Min Luo
- Laboratory of Aging Research and Cancer Drug Target, State Key Laboratory of Biotherapy and Cancer Center, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu, China
| |
Collapse
|
23
|
Mazzitelli I, Bleichmar L, Melucci C, Gerber PP, Toscanini A, Cuestas ML, Diaz FE, Geffner J. High Salt Induces a Delayed Activation of Human Neutrophils. Front Immunol 2022; 13:831844. [PMID: 35720394 PMCID: PMC9204211 DOI: 10.3389/fimmu.2022.831844] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Accepted: 05/11/2022] [Indexed: 01/18/2023] Open
Abstract
High salt (NaCl) concentrations are found in a number of tissues under physiological and pathological conditions. Here, we analyzed the effects induced by high salt on the function of human neutrophils. The culture of neutrophils in medium supplemented with high salt (50 mM NaCl) for short periods (30-120 min) inhibited the ability of conventional agonists to induce the production of IL-8 and the activation of respiratory burst. By contrast, exposure to high salt for longer periods (6-18 h) resulted in the activation of neutrophils revealed by the production of high levels of IL-8, the activation of the respiratory burst, and a marked synergistic effect on the production of TNF-α induced by LPS. Increasing osmolarity of the culture medium by the addition of sorbitol or mannitol (100 mM) was shown to be completely unable to stimulate neutrophil responses, suggesting that high sodium but not an increased osmolarity mediates the activation on neutrophils responses. A similar biphasic effect was observed when the function of monocytes was analyzed. Short term exposure to high salt suppressed IL-8 and TNF-α production induced by LPS while culture for longer periods triggered the production of IL-8 but not TNF-α in the absence of LPS stimulation. Contradictory results have been published regarding how high salt modulates neutrophil function. Our results suggest that the modulation of neutrophil function by high salt is strongly dependent on the exposure time.
Collapse
Affiliation(s)
- Ignacio Mazzitelli
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), Consejo Nacional de Investigaciones Cientìficas y Tecnològicas (CONICET), Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Lucía Bleichmar
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), Consejo Nacional de Investigaciones Cientìficas y Tecnològicas (CONICET), Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Claudia Melucci
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), Consejo Nacional de Investigaciones Cientìficas y Tecnològicas (CONICET), Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Pehuén Pereyra Gerber
- Cambridge Institute for Therapeutic Immunology and Infectious Disease (CITIID), Jeffrey Cheah Biomedical Centre, University of Cambridge, Cambridge, United Kingdom
| | - Agustina Toscanini
- Microbiología y Parasitología Médica
Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPAM), Consejo Nacional de Investigaciones Cientìficas y Tecnològicas (CONICET), Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - María Luján Cuestas
- Microbiología y Parasitología Médica
Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPAM), Consejo Nacional de Investigaciones Cientìficas y Tecnològicas (CONICET), Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Fernando Erra Diaz
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), Consejo Nacional de Investigaciones Cientìficas y Tecnològicas (CONICET), Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Jorge Geffner
- Instituto de Investigaciones Biomédicas en Retrovirus y SIDA (INBIRS), Consejo Nacional de Investigaciones Cientìficas y Tecnològicas (CONICET), Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
- *Correspondence: Jorge Geffner,
| |
Collapse
|
24
|
Han X, Ren J, Lohner H, Yakoumatos L, Liang R, Wang H. SGK1 negatively regulates inflammatory immune responses and protects against alveolar bone loss through modulation of TRAF3 activity. J Biol Chem 2022; 298:102036. [PMID: 35588785 PMCID: PMC9190018 DOI: 10.1016/j.jbc.2022.102036] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 05/09/2022] [Accepted: 05/10/2022] [Indexed: 12/05/2022] Open
Abstract
Serum- and glucocorticoid-regulated kinase 1 (SGK1) is a serine/threonine kinase that plays important roles in the cellular stress response. While SGK1 has been reported to restrain inflammatory immune responses, the molecular mechanisms involved remain elusive, especially in oral bacteria-induced inflammatory milieu. Here, we found that SGK1 curtails Porphyromonas gingivalis-induced inflammatory responses through maintaining levels of tumor necrosis factor receptor-associated factor (TRAF) 3, thereby suppressing NF-κB signaling. Specifically, SGK1 inhibition significantly enhances production of proinflammatory cytokines, including tumor necrosis factor α, interleukin (IL)-6, IL-1β, and IL-8 in P. gingivalis-stimulated innate immune cells. The results were confirmed with siRNA and LysM-Cre-mediated SGK1 KO mice. Moreover, SGK1 deletion robustly increased NF-κB activity and c-Jun expression but failed to alter the activation of mitogen-activated protein kinase signaling pathways. Further mechanistic data revealed that SGK1 deletion elevates TRAF2 phosphorylation, leading to TRAF3 degradation in a proteasome-dependent manner. Importantly, siRNA-mediated traf3 silencing or c-Jun overexpression mimics the effect of SGK1 inhibition on P. gingivalis-induced inflammatory cytokines and NF-κB activation. In addition, using a P. gingivalis infection-induced periodontal bone loss model, we found that SGK1 inhibition modulates TRAF3 and c-Jun expression, aggravates inflammatory responses in gingival tissues, and exacerbates alveolar bone loss. Altogether, we demonstrated for the first time that SGK1 acts as a rheostat to limit P. gingivalis-induced inflammatory immune responses and mapped out a novel SGK1-TRAF2/3-c-Jun-NF-κB signaling axis. These findings provide novel insights into the anti-inflammatory molecular mechanisms of SGK1 and suggest novel interventional targets to inflammatory diseases relevant beyond the oral cavity.
Collapse
Affiliation(s)
- Xiao Han
- Department of Oral and Craniofacial Molecular Biology, VCU Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Junling Ren
- Department of Oral and Craniofacial Molecular Biology, VCU Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Hannah Lohner
- Department of Oral and Craniofacial Molecular Biology, VCU Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Lan Yakoumatos
- Department of Oral Immunology and Infectious Diseases, University of Louisville, Louisville, Kentucky, USA
| | - Ruqiang Liang
- Department of Biochemistry and Molecular Medicine, University of California, Davis, Davis, California, USA
| | - Huizhi Wang
- Department of Oral and Craniofacial Molecular Biology, VCU Philips Institute for Oral Health Research, Virginia Commonwealth University, Richmond, Virginia, USA.
| |
Collapse
|
25
|
Cheung CY, Huang TT, Chow N, Zhang S, Zhao Y, Chau MP, Chan WC, Wong CCL, Boassa D, Phan S, Ellisman MH, Yates JR, Xu S, Yu Z, Zhang Y, Zhang R, Ng LL, Ko BCB. Unconventional tonicity-regulated nuclear trafficking of NFAT5 mediated by KPNB1, XPOT and RUVBL2. J Cell Sci 2022; 135:275560. [PMID: 35635291 PMCID: PMC9377714 DOI: 10.1242/jcs.259280] [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: 08/18/2021] [Accepted: 05/20/2022] [Indexed: 11/20/2022] Open
Abstract
NFAT5 is the only known mammalian tonicity-responsive transcription factor with essential role in cellular adaptation to hypertonic stress. It is also implicated in diverse physiological and pathological processes. NFAT5 activity is tightly regulated by extracellular tonicity, but the underlying mechanisms remain elusive. We demonstrated that NFAT5 enters the nucleus via the nuclear pore complex. We found that NFAT5 utilizes a unique nuclear localization signal (NFAT5-NLS) for nuclear import. siRNA screening revealed that only karyopherin β1 (KPNB1), but not karyopherin alpha, is responsible for the nuclear import of NFAT5 via direct interaction with the NFAT5-NLS. Proteomics analysis and siRNA screening further revealed that nuclear export of NFAT5 under hypotonicity is driven by Exportin-T, where the process requires RuvB-Like AAA type ATPase 2 (RUVBL2) as an indispensable chaperone. Our findings have identified an unconventional tonicity-dependent nucleocytoplasmic trafficking pathway for NFAT5, a critical step in orchestrating rapid cellular adaptation to change in extracellular tonicity. These findings offer an opportunity for the development of novel NFAT5 targeting strategies that are potentially useful for the treatment of diseases associated with NFAT5 dysregulation.
Collapse
Affiliation(s)
- Chris Y Cheung
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China
| | - Ting-Ting Huang
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China
| | - Ning Chow
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China
| | - Shuqi Zhang
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China
| | - Yanxiang Zhao
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China
| | - Mary P Chau
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China
| | - Wing Cheung Chan
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China
| | - Catherine C L Wong
- Center for Precision Medicine Muti-Omics Research, Health Science Center, Peking University, China Clinical Laboratory Department, The Cancer Hospital of the University of Chinese Academy of Sciences, Beijing, China
| | - Daniela Boassa
- Department of Neurosciences, University of California, San Diego, USA.,Center for Research in Biological Systems, National Center for Microscopy and Imaging Research, University of California, San Diego, La Jolla, California, USA
| | - Sebastien Phan
- Department of Neurosciences, University of California, San Diego, USA.,Center for Research in Biological Systems, National Center for Microscopy and Imaging Research, University of California, San Diego, La Jolla, California, USA
| | - Mark H Ellisman
- Department of Neurosciences, University of California, San Diego, USA.,Center for Research in Biological Systems, National Center for Microscopy and Imaging Research, University of California, San Diego, La Jolla, California, USA
| | - John R Yates
- Department of Chemical Physiology, The Scripps Research Institute, La Jolla, California, USA
| | - SongXiao Xu
- The Clinical Laboratory Department, The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Institute of Basic Medicine and Cancer, Chinese Academy of Sciences, Hangzhou, Zhejiang, China
| | - Zicheng Yu
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China
| | - Yajing Zhang
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China
| | - Rui Zhang
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China
| | - Ling Ling Ng
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China
| | - Ben C B Ko
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hong Kong, China.,State Key Laboratory of Chemical Biology and Drug Discovery, The Hong Kong Polytechnic University, Hong Kong, China
| |
Collapse
|
26
|
Microenvironmental influences on T cell immunity in cancer and inflammation. Cell Mol Immunol 2022; 19:316-326. [PMID: 35039633 PMCID: PMC8762638 DOI: 10.1038/s41423-021-00833-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 12/19/2021] [Indexed: 12/17/2022] Open
Abstract
T cell metabolism is dynamic and highly regulated. While the intrinsic metabolic programs of T cell subsets are integral to their distinct differentiation and functional patterns, the ability of cells to acquire nutrients and cope with hostile microenvironments can limit these pathways. T cells must function in a wide variety of tissue settings, and how T cells interpret these signals to maintain an appropriate metabolic program for their demands or if metabolic mechanisms of immune suppression restrain immunity is an area of growing importance. Both in inflamed and cancer tissues, a wide range of changes in physical conditions and nutrient availability are now acknowledged to shape immunity. These include fever and increased temperatures, depletion of critical micro and macro-nutrients, and accumulation of inhibitory waste products. Here we review several of these factors and how the tissue microenvironment both shapes and constrains immunity.
Collapse
|
27
|
Role of Oxidative Stress in Vascular Low-Grade Inflammation Initiation Due to Acute Salt Loading in Young Healthy Individuals. Antioxidants (Basel) 2022; 11:antiox11030444. [PMID: 35326095 PMCID: PMC8944840 DOI: 10.3390/antiox11030444] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 02/20/2022] [Accepted: 02/21/2022] [Indexed: 02/01/2023] Open
Abstract
This study aimed to investigate the effect of 7-day high-salt (HS) and the specific role of oxidative stress on vascular low-grade inflammation initiation in young salt-resistant healthy individuals. 30 young healthy individuals adhered to a 7-day low-salt (LS) diet (3.5 g salt/day), followed by a 7-day high-salt (HS) diet (~14.7 g salt/day) protocol. Pro- and anti-inflammatory cytokines, frequencies of peripheral blood Th17 and Treg cells, Th17/Treg ratio, enzymes SGK1, and p38/MAP kinase, as well as biomarkers of endothelial activation and oxidative stress, were measured before and after the 7-day HS diet protocol. Short-term HS diet significantly increased serum level of pro-inflammatory cytokines INF-γ, TNF-α, IL-9, and IL-17A levels, but also of anti-inflammatory cytokines IL-10 and TGF-β1. Relative amount of total SGK1 significantly increased, following the 7-day HS diet. Increased oxidative stress level, following HS diet, was negatively associated with the frequency of Treg cells. The increase in relative amount of total SGK1 in peripheral mononuclear cells following 7-day HS diet suggests lymphocyte (re)activation, in response to HS intake, resulting in enhanced production of pro-inflammatory (IL-17, INF-γ), but also anti-inflammatory cytokines (IL-10 and TGF-β1). Increased oxidative stress, due to HS loading, alters immune regulatory mechanisms, presumably via effects on Treg cells.
Collapse
|
28
|
Musiol S, Alessandrini F, Jakwerth CA, Chaker AM, Schneider E, Guerth F, Schnautz B, Grosch J, Ghiordanescu I, Ullmann JT, Kau J, Plaschke M, Haak S, Buch T, Schmidt-Weber CB, Zissler UM. TGF-β1 Drives Inflammatory Th Cell But Not Treg Cell Compartment Upon Allergen Exposure. Front Immunol 2022; 12:763243. [PMID: 35069535 PMCID: PMC8777012 DOI: 10.3389/fimmu.2021.763243] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 11/29/2021] [Indexed: 12/22/2022] Open
Abstract
TGF-β1 is known to have a pro-inflammatory impact by inducing Th9 and Th17 cells, while it also induces anti-inflammatory Treg cells (Tregs). In the context of allergic airway inflammation (AAI) its dual role can be of critical importance in influencing the outcome of the disease. Here we demonstrate that TGF-β is a major player in AAI by driving effector T cells, while Tregs differentiate independently. Induction of experimental AAI and airway hyperreactivity in a mouse model with inducible genetic ablation of the gene encoding for TGFβ-receptor 2 (Tgfbr2) on CD4+T cells significantly reduced the disease phenotype. Further, it blocked the induction of pro-inflammatory T cell frequencies (Th2, Th9, Th17), but increased Treg cells. To translate these findings into a human clinically relevant context, Th2, Th9 and Treg cells were quantified both locally in induced sputum and systemically in blood of allergic rhinitis and asthma patients with or without allergen-specific immunotherapy (AIT). Natural allergen exposure induced local and systemic Th2, Th9, and reduced Tregs cells, while therapeutic allergen exposure by AIT suppressed Th2 and Th9 cell frequencies along with TGF-β and IL-9 secretion. Altogether, these findings support that neutralization of TGF-β represents a viable therapeutic option in allergy and asthma, not posing the risk of immune dysregulation by impacting Tregs cells.
Collapse
Affiliation(s)
- Stephanie Musiol
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Center Munich, German Research Center for Environmental Health, Members of the German Center of Lung Research (DZL), Munich, Germany
| | - Francesca Alessandrini
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Center Munich, German Research Center for Environmental Health, Members of the German Center of Lung Research (DZL), Munich, Germany
| | - Constanze A Jakwerth
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Center Munich, German Research Center for Environmental Health, Members of the German Center of Lung Research (DZL), Munich, Germany
| | - Adam M Chaker
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Center Munich, German Research Center for Environmental Health, Members of the German Center of Lung Research (DZL), Munich, Germany.,Department of Otorhinolaryngology, Klinikum rechts der Isar, TUM School of Medicine, Technical University Munich, Munich, Germany
| | - Evelyn Schneider
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Center Munich, German Research Center for Environmental Health, Members of the German Center of Lung Research (DZL), Munich, Germany
| | - Ferdinand Guerth
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Center Munich, German Research Center for Environmental Health, Members of the German Center of Lung Research (DZL), Munich, Germany
| | - Benjamin Schnautz
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Center Munich, German Research Center for Environmental Health, Members of the German Center of Lung Research (DZL), Munich, Germany
| | - Johanna Grosch
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Center Munich, German Research Center for Environmental Health, Members of the German Center of Lung Research (DZL), Munich, Germany
| | - Ileana Ghiordanescu
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Center Munich, German Research Center for Environmental Health, Members of the German Center of Lung Research (DZL), Munich, Germany
| | - Julia T Ullmann
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Center Munich, German Research Center for Environmental Health, Members of the German Center of Lung Research (DZL), Munich, Germany
| | - Josephine Kau
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Center Munich, German Research Center for Environmental Health, Members of the German Center of Lung Research (DZL), Munich, Germany
| | - Mirjam Plaschke
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Center Munich, German Research Center for Environmental Health, Members of the German Center of Lung Research (DZL), Munich, Germany
| | - Stefan Haak
- Institute of Laboratory Animal Science, University of Zurich, Zurich, Switzerland
| | - Thorsten Buch
- Institute of Laboratory Animal Science, University of Zurich, Zurich, Switzerland
| | - Carsten B Schmidt-Weber
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Center Munich, German Research Center for Environmental Health, Members of the German Center of Lung Research (DZL), Munich, Germany
| | - Ulrich M Zissler
- Center of Allergy & Environment (ZAUM), Technical University of Munich (TUM) and Helmholtz Center Munich, German Research Center for Environmental Health, Members of the German Center of Lung Research (DZL), Munich, Germany
| |
Collapse
|
29
|
Mauro TM. Ode to Salt: Commentary on "Skin Sodium Accumulates in Psoriasis and Reflects Disease Severity". J Invest Dermatol 2022; 142:16-17. [PMID: 34565562 PMCID: PMC8740904 DOI: 10.1016/j.jid.2021.08.401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 12/29/2022]
Abstract
"Skin Sodium Accumulates in Psoriasis and Reflects Disease Severity" (Maifeld et al., 2021) showed that skin sodium ion (Na+) is increased in patients with a PASI > 5. Na+ concentration as well as its content were increased in these patients, supporting the proposed mechanism that increased Na+ concentrations enhance IL-17 expression from CD4+ cells. These data initially were generated using a noninvasive technique, sodium (23Na) magnetic resonance imaging, and then were verified using 23Na spectroscopy and atomic absorption spectrometry in ashed-skin biopsies in humans and also using mouse models of psoriasis. These findings suggest a novel pathologic mechanism for psoriasis development and target for treatment.
Collapse
Affiliation(s)
- Theodora M Mauro
- Department of Dermatology, University of California San Francisco, San Francisco, California, USA; Dermatology Service, Veterans Affairs Health Care System, San Francisco, California, USA.
| |
Collapse
|
30
|
Yoshida T, Beck LA, De Benedetto A. Skin barrier defects in atopic dermatitis: From old idea to new opportunity. Allergol Int 2022; 71:3-13. [PMID: 34916117 PMCID: PMC8934597 DOI: 10.1016/j.alit.2021.11.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Accepted: 11/22/2021] [Indexed: 01/31/2023] Open
Abstract
Atopic dermatitis (AD) is the most common chronic skin inflammatory disease, with a profound impact on patients’ quality of life. AD varies considerably in clinical course, age of onset and degree to which it is accompanied by allergic and non-allergic comorbidities. Skin barrier impairment in both lesional and nonlesional skin is now recognized as a critical and often early feature of AD. This may be explained by a number of abnormalities identified within both the stratum corneum and stratum granulosum layers of the epidermis. The goal of this review is to provide an overview of key barrier defects in AD, starting with a historical perspective. We will also highlight some of the commonly used methods to characterize and quantify skin barrier function. There is ample opportunity for further investigative work which we call out throughout this review. These include: quantifying the relative impact of individual epidermal abnormalities and putting this in a more holistic view with physiological measures of barrier function, as well as determining whether these barrier-specific endotypes predict clinical phenotypes (e.g. age of onset, natural history, comorbidities, response to therapies, etc). Mechanistic studies with new (and in development) AD therapies that specifically target immune pathways, Staphylococcus aureus abundance and/or skin barrier will help us understand the dynamic crosstalk between these compartments and their relative importance in AD.
Collapse
|
31
|
Muhammad K, Xavier D, Klein-Hessling S, Azeem M, Rauschenberger T, Murti K, Avots A, Goebeler M, Klein M, Bopp T, Sielaff M, Tenzer S, Möckel S, Aramburu J, López-Rodríguez C, Kerstan A, Serfling E. NFAT5 Controls the Integrity of Epidermis. Front Immunol 2021; 12:780727. [PMID: 34956208 PMCID: PMC8696207 DOI: 10.3389/fimmu.2021.780727] [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: 09/21/2021] [Accepted: 11/15/2021] [Indexed: 11/13/2022] Open
Abstract
The skin protects the human body against dehydration and harmful challenges. Keratinocytes (KCs) are the most abundant epidermal cells, and it is anticipated that KC-mediated transport of Na+ ions creates a physiological barrier of high osmolality against the external environment. Here, we studied the role of NFAT5, a transcription factor whose activity is controlled by osmotic stress in KCs. Cultured KCs from adult mice were found to secrete more than 300 proteins, and upon NFAT5 ablation, the secretion of several matrix proteinases, including metalloproteinase-3 (Mmp3) and kallikrein-related peptidase 7 (Klk7), was markedly enhanced. An increase in Mmp3 and Klk7 RNA levels was also detected in transcriptomes of Nfat5-/- KCs, along with increases of numerous members of the 'Epidermal Differentiation Complex' (EDC), such as small proline-rich (Sprr) and S100 proteins. NFAT5 and Mmp3 as well as NFAT5 and Klk7 are co-expressed in the basal KCs of fetal and adult epidermis but not in basal KCs of newborn (NB) mice. The poor NFAT5 expression in NB KCs is correlated with a strong increase in Mmp3 and Klk7 expression in KCs of NB mice. These data suggests that, along with the fragile epidermis of adult Nfat5-/- mice, NFAT5 keeps in check the expression of matrix proteases in epidermis. The NFAT5-mediated control of matrix proteases in epidermis contributes to the manifold changes in skin development in embryos before and during birth, and to the integrity of epidermis in adults.
Collapse
Affiliation(s)
- Khalid Muhammad
- Department of Molecular Pathology, Institute of Pathology, University of Wuerzburg, Wuerzburg, Germany
| | - Delicia Xavier
- Department of Molecular Pathology, Institute of Pathology, University of Wuerzburg, Wuerzburg, Germany
| | - Stefan Klein-Hessling
- Department of Molecular Pathology, Institute of Pathology, University of Wuerzburg, Wuerzburg, Germany.,Comprehensive Cancer Centre Mainfranken, Wuerzburg, Germany
| | - Muhammad Azeem
- Department of Molecular Pathology, Institute of Pathology, University of Wuerzburg, Wuerzburg, Germany.,Department of Dermatology, Venereology and Allergology, University Hospital Wuerzburg, Wuerzburg, Germany
| | - Tabea Rauschenberger
- Department of Molecular Pathology, Institute of Pathology, University of Wuerzburg, Wuerzburg, Germany
| | - Krisna Murti
- Department of Molecular Pathology, Institute of Pathology, University of Wuerzburg, Wuerzburg, Germany
| | - Andris Avots
- Department of Molecular Pathology, Institute of Pathology, University of Wuerzburg, Wuerzburg, Germany.,Comprehensive Cancer Centre Mainfranken, Wuerzburg, Germany
| | - Matthias Goebeler
- Department of Dermatology, Venereology and Allergology, University Hospital Wuerzburg, Wuerzburg, Germany
| | - Matthias Klein
- Institute for Immunology, University Medical Center, University of Mainz, Mainz, Germany
| | - Tobias Bopp
- Institute for Immunology, University Medical Center, University of Mainz, Mainz, Germany.,Research Center for Immunotherapy, University Medical Center, University of Mainz, Mainz, Germany.,University Cancer Center Mainz, University Medical Center, University of Mainz, Mainz, Germany
| | - Malte Sielaff
- Institute for Immunology, University Medical Center, University of Mainz, Mainz, Germany
| | - Stefan Tenzer
- Institute for Immunology, University Medical Center, University of Mainz, Mainz, Germany
| | - Sigrid Möckel
- Institute of Pathology, University of Wuerzburg, Wuerzburg, Germany
| | - José Aramburu
- Immunology Unit, Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Barcelona, Spain
| | - Cristina López-Rodríguez
- Immunology Unit, Department of Experimental and Health Sciences, Universitat Pompeu Fabra, Barcelona, Spain
| | - Andreas Kerstan
- Department of Dermatology, Venereology and Allergology, University Hospital Wuerzburg, Wuerzburg, Germany
| | - Edgar Serfling
- Department of Molecular Pathology, Institute of Pathology, University of Wuerzburg, Wuerzburg, Germany.,Comprehensive Cancer Centre Mainfranken, Wuerzburg, Germany
| |
Collapse
|
32
|
Li Y, Su J, Luo D, Duan Y, Huang Z, He M, Tao J, Xiao S, Xiao Y, Chen X, Shen M. Processed Food and Atopic Dermatitis: A Pooled Analysis of Three Cross-Sectional Studies in Chinese Adults. Front Nutr 2021; 8:754663. [PMID: 34938758 PMCID: PMC8685501 DOI: 10.3389/fnut.2021.754663] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 11/17/2021] [Indexed: 01/06/2023] Open
Abstract
Objective: The effect of processed foods on atopic dermatitis (AD) in adults is unclear. This study was to evaluate the association between processed foods and AD in the Chinese adult population. Design: This study included three population-based cross-sectional studies using cluster sampling by villages, institutions, or factories. Participants underwent dermatological examinations by certificated dermatologists and a food frequency questionnaire survey. A spot urine sample was collected to estimate the daily sodium intake. Adjusted odds ratios (aORs) and 95% confidence intervals (CIs) were presented as the effect size. Setting: Shiyan city of Hubei province, and Huayuan, Shimen, Hengyang, Zhuzhou, and Changsha of Hunan province. Participants: Automobile manufacture workers from Shiyan of Hubei province, and rural residents and civil servants from Hunan. Results: A total of 15,062 participants, including 3,781 rural residents, 5,111 civil servants, and 6,170 workers, completed all evaluations. Compared to those hardly consumed pickles, consumption of pickles 1–3 times per week was significantly associated with AD (aOR: 1.35; 95% CI: 1.06–1.70). The intake of processed meats 1–3 times per month (aOR: 1.29; 95% CI: 1.05–1.58) and 1–3 times per week (aOR: 1.44; 95% CI: 1.11–1.87) were associated with AD dose-dependently when compared with those who rarely ate processed meats. Compared with non-consumers, the consumption of any processed foods 1–3 times per week (aOR: 1.39; 95% CI: 1.08–1.80) and ≥4 times per week (aOR: 1.41; 95% CI: 1.05–1.89) showed increased risks of AD. A positive association of estimated sodium intake with AD was also observed. Conclusion: Intake of processed foods is associated with AD in Chinese adults.
Collapse
Affiliation(s)
- Yajia Li
- Department of Dermatology, Hunan Engineering Research Center of Skin Health and Disease, Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Central South University, Changsha, China
| | - Juan Su
- Department of Dermatology, Hunan Engineering Research Center of Skin Health and Disease, Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Central South University, Changsha, China
| | - Dan Luo
- Department of Social Medicine and Health Management, Xiangya School of Public Health, Central South University, Changsha, China
| | - Yanying Duan
- Department of Occupational and Environmental Health, Xiangya School of Public Health, Central South University, Changsha, China
| | - Zhijun Huang
- Center of Clinical Pharmacology, The Third Xiangya Hospital, Central South University, Changsha, China
| | - Meian He
- Department of Occupational and Environmental Health, State Key Laboratory of Environmental Health for Incubating, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Juan Tao
- Department of Dermatology, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Shuiyuan Xiao
- Department of Social Medicine and Health Management, Xiangya School of Public Health, Central South University, Changsha, China
| | - Yi Xiao
- Department of Dermatology, Hunan Engineering Research Center of Skin Health and Disease, Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Central South University, Changsha, China
| | - Xiang Chen
- Department of Dermatology, Hunan Engineering Research Center of Skin Health and Disease, Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Central South University, Changsha, China
| | - Minxue Shen
- Department of Dermatology, Hunan Engineering Research Center of Skin Health and Disease, Hunan Key Laboratory of Skin Cancer and Psoriasis, Xiangya Hospital, Central South University, Changsha, China.,Department of Social Medicine and Health Management, Xiangya School of Public Health, Central South University, Changsha, China
| |
Collapse
|
33
|
Ma Z, Hummel SL, Sun N, Chen Y. From salt to hypertension, what is missed? J Clin Hypertens (Greenwich) 2021; 23:2033-2041. [PMID: 34846798 PMCID: PMC8696232 DOI: 10.1111/jch.14402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 10/20/2021] [Accepted: 11/03/2021] [Indexed: 01/18/2023]
Abstract
Excess salt intake is viewed as a major contributor to hypertension and cardiovascular disease, and dietary salt restriction is broadly recommended by public health guidelines. However, individuals can have widely varying physiological responses to salt intake, and a tailored approach to evaluation and intervention may be needed. The traditional sodium related concepts are challenging to assess clinically for two reasons: (1) spot and 24-hour urine sodium are frequently used to evaluate salt intake, but are more suitable for population study, and (2) some adverse effects of salt may be blood pressure-independent. In recent years, previously unknown mechanisms of sodium absorption and storage have been discovered. This review will outline the limitations of current methods to assess sodium balance and discuss new potential evaluation methods and treatment targets.
Collapse
Affiliation(s)
- Zhiyi Ma
- Cardiology DepartmentBeijing Tsinghua Changgung HospitalSchool of Clinical MedicineTsinghua UniversityBeijingChina
| | - Scott L. Hummel
- Ann Arbor Veterans Affairs Health SystemUniversity of Michigan Frankel Cardiovascular CenterAnn ArborMichiganUSA
| | - Ningling Sun
- Cardiology DepartmentHeart CenterPeking University People's HospitalBeijingChina
| | - Yuanyuan Chen
- Cardiology DepartmentHeart CenterPeking University People's HospitalBeijingChina
| |
Collapse
|
34
|
Pajtók C, Veres-Székely A, Agócs R, Szebeni B, Dobosy P, Németh I, Veréb Z, Kemény L, Szabó AJ, Vannay Á, Tulassay T, Pap D. High salt diet impairs dermal tissue remodeling in a mouse model of IMQ induced dermatitis. PLoS One 2021; 16:e0258502. [PMID: 34723976 PMCID: PMC8559960 DOI: 10.1371/journal.pone.0258502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 09/28/2021] [Indexed: 02/02/2023] Open
Abstract
Recent animal studies, as well as quantitative sodium MRI observations on humans demonstrated that remarkable amounts of sodium can be stored in the skin. It is also known that excess sodium in the tissues leads to inflammation in various organs, but its role in dermal pathophysiology has not been elucidated. Therefore, our aim was to study the effect of dietary salt loading on inflammatory process and related extracellular matrix (ECM) remodeling in the skin. To investigate the effect of high salt consumption on inflammation and ECM production in the skin mice were kept on normal (NSD) or high salt (HSD) diet and then dermatitis was induced with imiquimod (IMQ) treatment. The effect of high salt concentration on dermal fibroblasts (DF) and peripheral blood mononuclear cells (PBMC) was also investigated in vitro. The HSD resulted in increased sodium content in the skin of mice. Inflammatory cytokine Il17 expression was elevated in the skin of HSD mice. Expression of anti-inflammatory Il10 and Il13 decreased in the skin of HSD or HSD IMQ mice. The fibroblast marker Acta2 and ECM component Fn and Col1a1 decreased in HSD IMQ mice. Expression of ECM remodeling related Pdgfb and activation phosphorylated (p)-SMAD2/3 was lower in HSD IMQ mice. In PBMCs, production of IL10, IL13 and PDGFB was reduced due to high salt loading. In cultured DFs high salt concentration resulted in decreased cell motility and ECM production, as well. Our results demonstrate that high dietary salt intake is associated with increased dermal pro-inflammatory status. Interestingly, although inflammation induces the synthesis of ECM in most organs, the expression of ECM decreased in the inflamed skin of mice on high salt diet. Our data suggest that salt intake may alter the process of skin remodeling.
Collapse
Affiliation(s)
- Csenge Pajtók
- 1st Department of Paediatrics, Semmelweis University, Budapest, Hungary
| | - Apor Veres-Székely
- 1st Department of Paediatrics, Semmelweis University, Budapest, Hungary
- ELKH-SE Pediatrics and Nephrology Research Group, Budapest, Hungary
| | - Róbert Agócs
- 1st Department of Paediatrics, Semmelweis University, Budapest, Hungary
| | - Beáta Szebeni
- 1st Department of Paediatrics, Semmelweis University, Budapest, Hungary
- ELKH-SE Pediatrics and Nephrology Research Group, Budapest, Hungary
| | - Péter Dobosy
- Institute of Aquatic Ecology, Centre for Ecological Research, Budapest, Hungary
| | - István Németh
- Faculty of Medicine, Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary
| | - Zoltán Veréb
- Faculty of Medicine, Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary
| | - Lajos Kemény
- Faculty of Medicine, Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary
| | - Attila J. Szabó
- 1st Department of Paediatrics, Semmelweis University, Budapest, Hungary
- ELKH-SE Pediatrics and Nephrology Research Group, Budapest, Hungary
| | - Ádám Vannay
- ELKH-SE Pediatrics and Nephrology Research Group, Budapest, Hungary
| | - Tivadar Tulassay
- 1st Department of Paediatrics, Semmelweis University, Budapest, Hungary
- ELKH-SE Pediatrics and Nephrology Research Group, Budapest, Hungary
| | - Domonkos Pap
- 1st Department of Paediatrics, Semmelweis University, Budapest, Hungary
- ELKH-SE Pediatrics and Nephrology Research Group, Budapest, Hungary
| |
Collapse
|
35
|
Liu Z, Li SK, Huang CK, Huang CF. A High-Sodium Diet Modulates the Immune Response of Food Allergy in a Murine Model. Nutrients 2021; 13:nu13113684. [PMID: 34835940 PMCID: PMC8621805 DOI: 10.3390/nu13113684] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 10/13/2021] [Accepted: 10/14/2021] [Indexed: 12/13/2022] Open
Abstract
Mounting evidence demonstrates that a high-salt diet (HSD) not only affects hemodynamic changes but also disrupts immune homeostasis. The T helper 17 (Th17) and regulatory T cells (Tregs) are susceptible to hypersalinity. However, research on the influence of sodium on Th2-mediated food allergies remains scarce. We aimed to investigate the effect of dietary sodium on the immune response to food allergies. Mice maintained on an HSD (4% NaCl), low-salt diet (LSD; 0.4% NaCl), or control diet (CTRL; 1.0% NaCl) were orally sensitized with ovalbumin (OVA) and a cholera toxin (CT) adjuvant, and then subjected to an intragastric OVA challenge. OVA-specific immunoglobulin G (IgG), IgG1, IgG2a, and IgE antibodies were significantly higher in the HSD group than in the CTRL group (p < 0.001, p < 0.05, p < 0.01, and p < 0.05, respectively). Mice on HSD had significantly higher interleukin (IL)-4 levels than the CTRL group (p < 0.01). The IL-10 levels were significantly lower in the HSD group than in the CTRL group (p < 0.05). The serum levels of interferon-γ (IFN-γ), sodium, and chloride did not differ among the three groups. This study indicates that excessive salt intake promotes Th2 responses in a mouse model of food allergy.
Collapse
Affiliation(s)
- Zheying Liu
- Emergency Department, Department of Emergency and Critical Medicine, Wan Fang Hospital, Taipei Medical University, Taipei City 11696, Taiwan;
- Department of Emergency, School of Medicine, College of Medicine, Taipei Medical University, Taipei City 11031, Taiwan
- Department of Pediatrics, Wan Fang Hospital, Taipei Medical University, Taipei City 11696, Taiwan
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Taipei Veterans General Hospital, Taipei City 11217, Taiwan; (S.-K.L.); (C.-K.H.)
| | - Shih-Kuan Li
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Taipei Veterans General Hospital, Taipei City 11217, Taiwan; (S.-K.L.); (C.-K.H.)
- Department of Pediatrics, Yonghe Cardinal Tien Hospital, New Taipei City 23445, Taiwan
| | - Chih-Kang Huang
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Taipei Veterans General Hospital, Taipei City 11217, Taiwan; (S.-K.L.); (C.-K.H.)
- Department of Pediatrics, Taipei Veterans General Hospital, Taoyuan Branch, Taoyuan City 33052, Taiwan
| | - Ching-Feng Huang
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Taipei Veterans General Hospital, Taipei City 11217, Taiwan; (S.-K.L.); (C.-K.H.)
- National Defense Medical Center, School of Medicine, Taipei City 11490, Taiwan
- Correspondence: ; Tel.: +886-2-2875-7019; Fax: +886-2-2873-9019
| |
Collapse
|
36
|
Krampert L, Bauer K, Ebner S, Neubert P, Ossner T, Weigert A, Schatz V, Toelge M, Schröder A, Herrmann M, Schnare M, Dorhoi A, Jantsch J. High Na + Environments Impair Phagocyte Oxidase-Dependent Antibacterial Activity of Neutrophils. Front Immunol 2021; 12:712948. [PMID: 34566968 PMCID: PMC8461097 DOI: 10.3389/fimmu.2021.712948] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 08/04/2021] [Indexed: 01/21/2023] Open
Abstract
Infection and inflammation can augment local Na+ abundance. These increases in local Na+ levels boost proinflammatory and antimicrobial macrophage activity and can favor polarization of T cells towards a proinflammatory Th17 phenotype. Although neutrophils play an important role in fighting intruding invaders, the impact of increased Na+ on the antimicrobial activity of neutrophils remains elusive. Here we show that, in neutrophils, increases in Na+ (high salt, HS) impair the ability of human and murine neutrophils to eliminate Escherichia coli and Staphylococcus aureus. High salt caused reduced spontaneous movement, degranulation and impaired production of reactive oxygen species (ROS) while leaving neutrophil viability unchanged. High salt enhanced the activity of the p38 mitogen-activated protein kinase (p38/MAPK) and increased the interleukin (IL)-8 release in a p38/MAPK-dependent manner. Whereas inhibition of p38/MAPK did not result in improved neutrophil defense, pharmacological blockade of the phagocyte oxidase (PHOX) or its genetic ablation mimicked the impaired antimicrobial activity detected under high salt conditions. Stimulation of neutrophils with phorbol-12-myristate-13-acetate (PMA) overcame high salt-induced impairment in ROS production and restored antimicrobial activity of neutrophils. Hence, we conclude that high salt-impaired PHOX activity results in diminished antimicrobial activity. Our findings suggest that increases in local Na+ represent an ionic checkpoint that prevents excessive ROS production of neutrophils, which decreases their antimicrobial potential and could potentially curtail ROS-mediated tissue damage.
Collapse
Affiliation(s)
- Luka Krampert
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| | - Katharina Bauer
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| | - Stefan Ebner
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany.,Max Planck Institute (MPI) of Biochemistry, Martinsried, Germany
| | - Patrick Neubert
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| | - Thomas Ossner
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| | - Anna Weigert
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| | - Valentin Schatz
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| | - Martina Toelge
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| | - Agnes Schröder
- Institute of Orthodontics, University Hospital of Regensburg, Regensburg, Germany
| | - Martin Herrmann
- Department of Internal Medicine 3-Rheumatology and Immunology and Deutsches Zentrum für Immuntherapie, Friedrich-Alexander-University Erlangen-Nürnberg, University Hospital Erlangen, Erlangen, Germany
| | - Markus Schnare
- Department of Immunology, Philipps University Marburg, Marburg, Germany
| | - Anca Dorhoi
- Institute of Immunology, Friedrich-Loeffler Institut, Greifswald, Germany.,Faculty of Mathematics and Natural Sciences, University of Greifswald, Greifswald, Germany
| | - Jonathan Jantsch
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| |
Collapse
|
37
|
Zielinski CE. Regulation of T Cell Responses by Ionic Salt Signals. Cells 2021; 10:cells10092365. [PMID: 34572015 PMCID: PMC8471541 DOI: 10.3390/cells10092365] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 09/07/2021] [Accepted: 09/07/2021] [Indexed: 12/16/2022] Open
Abstract
T helper cell responses are tailored to their respective antigens and adapted to their specific tissue microenvironment. While a great proportion of T cells acquire a resident identity, a significant proportion of T cells continue circulating, thus encountering changing microenvironmental signals during immune surveillance. One signal, which has previously been largely overlooked, is sodium chloride. It has been proposed to have potent effects on T cell responses in the context of autoimmune, allergic and infectious tissue inflammation in mouse models and humans. Sodium chloride is stringently regulated in the blood by the kidneys but displays differential deposition patterns in peripheral tissues. Sodium chloride accumulation might furthermore be regulated by dietary intake and thus by intentional behavior. Together, these results make sodium chloride an interesting but still controversial signal for immune modulation. Its downstream cellular activities represent a potential therapeutic target given its effects on T cell cytokine production. In this review article, we provide an overview and critical evaluation of the impact of this ionic signal on T helper cell polarization and T helper cell effector functions. In addition, the impact of sodium chloride from the tissue microenvironment is assessed for human health and disease and for its therapeutic potential.
Collapse
Affiliation(s)
- Christina E. Zielinski
- Department of Infection Immunology, Leibniz Institute for Natural Product Research and Infection Biology, Hans-Knoell-Institute, 07745 Jena, Germany;
- Department of Biological Sciences, Friedrich Schiller-University, 07743 Jena, Germany
| |
Collapse
|
38
|
Brown RB. Sodium Toxicity in the Nutritional Epidemiology and Nutritional Immunology of COVID-19. MEDICINA (KAUNAS, LITHUANIA) 2021; 57:739. [PMID: 34440945 PMCID: PMC8399536 DOI: 10.3390/medicina57080739] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 07/17/2021] [Accepted: 07/19/2021] [Indexed: 02/06/2023]
Abstract
Dietary factors in the etiology of COVID-19 are understudied. High dietary sodium intake leading to sodium toxicity is associated with comorbid conditions of COVID-19 such as hypertension, kidney disease, stroke, pneumonia, obesity, diabetes, hepatic disease, cardiac arrhythmias, thrombosis, migraine, tinnitus, Bell's palsy, multiple sclerosis, systemic sclerosis, and polycystic ovary syndrome. This article synthesizes evidence from epidemiology, pathophysiology, immunology, and virology literature linking sodium toxicological mechanisms to COVID-19 and SARS-CoV-2 infection. Sodium toxicity is a modifiable disease determinant that impairs the mucociliary clearance of virion aggregates in nasal sinuses of the mucosal immune system, which may lead to SARS-CoV-2 infection and viral sepsis. In addition, sodium toxicity causes pulmonary edema associated with severe acute respiratory syndrome, as well as inflammatory immune responses and other symptoms of COVID-19 such as fever and nasal sinus congestion. Consequently, sodium toxicity potentially mediates the association of COVID-19 pathophysiology with SARS-CoV-2 infection. Sodium dietary intake also increases in the winter, when sodium losses through sweating are reduced, correlating with influenza-like illness outbreaks. Increased SARS-CoV-2 infections in lower socioeconomic classes and among people in government institutions are linked to the consumption of foods highly processed with sodium. Interventions to reduce COVID-19 morbidity and mortality through reduced-sodium diets should be explored further.
Collapse
Affiliation(s)
- Ronald B Brown
- School of Public Health Sciences, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| |
Collapse
|
39
|
Maifeld A, Wild J, Karlsen TV, Rakova N, Wistorf E, Linz P, Jung R, Birukov A, Gimenez-Rivera VA, Wilck N, Bartolomaeus T, Dechend R, Kleinewietfeld M, Forslund SK, Krause A, Kokolakis G, Philipp S, Clausen BE, Brand A, Waisman A, Kurschus FC, Wegner J, Schultheis M, Luft FC, Boschmann M, Kelm M, Wiig H, Kuehne T, Müller DN, Karbach S, Markó L. Skin Sodium Accumulates in Psoriasis and Reflects Disease Severity. J Invest Dermatol 2021; 142:166-178.e8. [PMID: 34237339 DOI: 10.1016/j.jid.2021.06.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 05/14/2021] [Accepted: 06/03/2021] [Indexed: 12/14/2022]
Abstract
Sodium can accumulate in the skin at concentrations exceeding serum levels. A high sodium environment can lead to pathogenic T helper 17 cell expansion. Psoriasis is a chronic inflammatory skin disease in which IL-17‒producing T helper 17 cells play a crucial role. In an observational study, we measured skin sodium content in patients with psoriasis and in age-matched healthy controls by Sodium-23 magnetic resonance imaging. Patients with PASI > 5 showed significantly higher sodium and water content in the skin but not in other tissues than those with lower PASI or healthy controls. Skin sodium concentrations measured by Sodium-23 spectroscopy or by atomic absorption spectrometry in ashed-skin biopsies verified the findings with Sodium-23 magnetic resonance imaging. In vitro T helper 17 cell differentiation of naive CD4+ cells from patients with psoriasis markedly induced IL-17A expression under increased sodium chloride concentrations. The imiquimod-induced psoriasis mouse model replicated the human findings. Extracellular tracer Chromium-51-EDTA measurements in imiquimod- and sham-treated skin showed similar extracellular volumes, rendering excessive water of intracellular origin. Chronic genetic IL-17A‒driven psoriasis mouse models underlined the role of IL-17A in dermal sodium accumulation and inflammation. Our data describe skin sodium as a pathophysiological feature of psoriasis, which could open new avenues for its treatment.
Collapse
Affiliation(s)
- András Maifeld
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin and Max Delbrück Center for Molecular Medicine, Berlin, Germany; German Centre for Cardiovascular Research (DZHK), Berlin, Germany; Berlin Institute of Health, Charité - Universitätsmedizin Berlin, Berlin, Germany; Charité - Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Johannes Wild
- Center of Cardiology - Cardiology I, University Medical Center, Johannes Gutenberg-University Mainz, Mainz, Germany; Center for Thrombosis and Hemostasis (CTH), University Medical Center, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Tine V Karlsen
- Department of Biomedicine, University of Bergen, Bergen, Norway
| | - Natalia Rakova
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin and Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Elisa Wistorf
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin and Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Peter Linz
- Institute of Radiology, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany; Department of Nephrology and Hypertension, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Rebecca Jung
- Center for Thrombosis and Hemostasis (CTH), University Medical Center, Johannes Gutenberg-University Mainz, Mainz, Germany; Institute for Molecular Medicine, University Medical Center, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Anna Birukov
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin and Max Delbrück Center for Molecular Medicine, Berlin, Germany; German Centre for Cardiovascular Research (DZHK), Berlin, Germany; Department of Molecular Epidemiology, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany; German Center for Diabetes Research (DZD), Neuherberg, Germany
| | | | - Nicola Wilck
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin and Max Delbrück Center for Molecular Medicine, Berlin, Germany; German Centre for Cardiovascular Research (DZHK), Berlin, Germany; Berlin Institute of Health, Charité - Universitätsmedizin Berlin, Berlin, Germany; Department of Nephrology and Internal Intensive Care Medicine, Charité - Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Theda Bartolomaeus
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin and Max Delbrück Center for Molecular Medicine, Berlin, Germany; German Centre for Cardiovascular Research (DZHK), Berlin, Germany; Charité - Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Ralf Dechend
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin and Max Delbrück Center for Molecular Medicine, Berlin, Germany; German Centre for Cardiovascular Research (DZHK), Berlin, Germany; Berlin Institute of Health, Charité - Universitätsmedizin Berlin, Berlin, Germany; Charité - Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; Helios Clinic Berlin-Buch, Berlin, Germany
| | - Markus Kleinewietfeld
- VIB Laboratory of Translational Immunomodulation, VIB Center for Inflammation Research (IRC), Hasselt University Campus Diepenbeek, Hasselt, Belgium
| | - Sofia K Forslund
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin and Max Delbrück Center for Molecular Medicine, Berlin, Germany; German Centre for Cardiovascular Research (DZHK), Berlin, Germany; Berlin Institute of Health, Charité - Universitätsmedizin Berlin, Berlin, Germany; Charité - Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Andreas Krause
- Medical Centre for Rheumatology and Clinical Immunology, Immanuel Krankenhaus Berlin, Berlin, Germany
| | - Georgios Kokolakis
- Department of Dermatology, Venereology and Allergology, Charité - Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Sandra Philipp
- Department of Dermatology, Venereology and Allergology, Charité - Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Björn E Clausen
- Department of Nephrology and Hypertension, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Anna Brand
- Department of Nephrology and Hypertension, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Ari Waisman
- Department of Nephrology and Hypertension, Friedrich-Alexander-University Erlangen-Nürnberg, Erlangen, Germany
| | - Florian C Kurschus
- Department of Dermatology, Heidelberg University Hospital, Heidelberg, Germany
| | - Joanna Wegner
- Department of Dermatology, University Medical Center, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Michael Schultheis
- Department of Dermatology, University Medical Center, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Friedrich C Luft
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin and Max Delbrück Center for Molecular Medicine, Berlin, Germany
| | - Michael Boschmann
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin and Max Delbrück Center for Molecular Medicine, Berlin, Germany; Berlin Institute of Health, Charité - Universitätsmedizin Berlin, Berlin, Germany; Charité - Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Marcus Kelm
- Berlin Institute of Health, Charité - Universitätsmedizin Berlin, Berlin, Germany; Institute for Imaging Science and Computational Modelling in Cardiovascular Medicine, Charité - Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; Department of Congenital Heart Disease, German Heart Center Berlin (DHZB), Berlin, Germany
| | - Helge Wiig
- Department of Biomedicine, University of Bergen, Bergen, Norway
| | - Titus Kuehne
- Institute for Imaging Science and Computational Modelling in Cardiovascular Medicine, Charité - Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; Department of Congenital Heart Disease, German Heart Center Berlin (DHZB), Berlin, Germany
| | - Dominik N Müller
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin and Max Delbrück Center for Molecular Medicine, Berlin, Germany; German Centre for Cardiovascular Research (DZHK), Berlin, Germany; Berlin Institute of Health, Charité - Universitätsmedizin Berlin, Berlin, Germany; Charité - Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; Max Delbrück Center for Molecular Medicine in the Helmholtz Association Berlin, Berlin, Germany
| | - Susanne Karbach
- Center of Cardiology - Cardiology I, University Medical Center, Johannes Gutenberg-University Mainz, Mainz, Germany; Center for Thrombosis and Hemostasis (CTH), University Medical Center, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Lajos Markó
- Experimental and Clinical Research Center, Charité - Universitätsmedizin Berlin and Max Delbrück Center for Molecular Medicine, Berlin, Germany; German Centre for Cardiovascular Research (DZHK), Berlin, Germany; Berlin Institute of Health, Charité - Universitätsmedizin Berlin, Berlin, Germany; Charité - Universitätsmedizin Berlin, Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany.
| |
Collapse
|
40
|
Jobin K, Müller DN, Jantsch J, Kurts C. Sodium and its manifold impact on our immune system. Trends Immunol 2021; 42:469-479. [PMID: 33962888 DOI: 10.1016/j.it.2021.04.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 04/01/2021] [Accepted: 04/02/2021] [Indexed: 12/19/2022]
Abstract
The Western diet is rich in salt, and a high salt diet (HSD) is suspected to be a risk factor for cardiovascular diseases. It is now widely accepted that an experimental HSD can stimulate components of the immune system, potentially exacerbating certain autoimmune diseases, or alternatively, improving defenses against certain infections, such as cutaneous leishmaniasis. However, recent findings show that an experimental HSD may also aggravate other infections (e.g., pyelonephritis or systemic listeriosis). Here, we discuss the modulatory effects of a HSD on the microbiota, metabolic signaling, hormonal responses, local sodium concentrations, and their effects on various immune cell types in different tissues. We describe how these factors are integrated, resulting either in immune stimulation or suppression in various tissues and disease settings.
Collapse
Affiliation(s)
- Katarzyna Jobin
- Institute of Molecular Medicine and Experimental Immunology, University of Bonn, Bonn, Germany; Würzburg Institute of Systems Immunology, Max-Planck Research Group, University of Würzburg, Würzburg, Germany
| | - Dominik N Müller
- Experimental and Clinical Research Center (ECRC), a cooperation of Charité-Universitätsmedizin Berlin and Max Delbruck Center for Molecular Medicine, and Max Delbruck Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany; Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
| | - Jonathan Jantsch
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany.
| | - Christian Kurts
- Institute of Molecular Medicine and Experimental Immunology, University of Bonn, Bonn, Germany; Department of Microbiology and Immunology, Doherty Institute for Infection and Immunity, University of Melbourne, Victoria, Australia.
| |
Collapse
|
41
|
Huang Y, Omar M, Tian W, Lopez-Schier H, Westmeyer GG, Chmyrov A, Sergiadis G, Ntziachristos V. Noninvasive visualization of electrical conductivity in tissues at the micrometer scale. SCIENCE ADVANCES 2021; 7:eabd1505. [PMID: 33980478 PMCID: PMC8115913 DOI: 10.1126/sciadv.abd1505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 03/23/2021] [Indexed: 06/12/2023]
Abstract
Despite its importance in regulating cellular or tissue function, electrical conductivity can only be visualized in tissue indirectly as voltage potentials using fluorescent techniques, or directly with radio waves. These either requires invasive procedures like genetic modification or suffers from limited resolution. Here, we introduce radio-frequency thermoacoustic mesoscopy (RThAM) for the noninvasive imaging of conductivity by exploiting the direct absorption of near-field ultrashort radio-frequency pulses to stimulate the emission of broadband ultrasound waves. Detection of ultrasound rather than radio waves enables micrometer-scale resolutions, over several millimeters of tissue depth. We confirm an imaging resolution of <30 μm in phantoms and demonstrate microscopic imaging of conductivity correlating to physical structures in 1- and 512-cell zebrafish embryos, as well as larvae. These results support RThAM as a promising method for high-resolution, label-free assessment of conductivity in tissues.
Collapse
Affiliation(s)
- Yuanhui Huang
- Institute for Biological and Medical Imaging (IBMI), Helmholtz Zentrum München, D-85764 Neuherberg, Germany
- Chair of Biological Imaging at the Central Institute for Translational Cancer Research (TranslaTUM), School of Medicine, Technical University of Munich, D-81675 Munich, Germany
| | - Murad Omar
- Institute for Biological and Medical Imaging (IBMI), Helmholtz Zentrum München, D-85764 Neuherberg, Germany
- Chair of Biological Imaging at the Central Institute for Translational Cancer Research (TranslaTUM), School of Medicine, Technical University of Munich, D-81675 Munich, Germany
| | - Weili Tian
- Research Unit Sensory Biology and Organogenesis, Helmholtz Zentrum München, D-85764 Neuherberg, Germany
| | - Hernán Lopez-Schier
- Research Unit Sensory Biology and Organogenesis, Helmholtz Zentrum München, D-85764 Neuherberg, Germany
| | - Gil Gregor Westmeyer
- Institute for Biological and Medical Imaging (IBMI), Helmholtz Zentrum München, D-85764 Neuherberg, Germany
- Institute of Developmental Genetics (IDG), Helmholtz Zentrum München, D-85764 Neuherberg, Germany
| | - Andriy Chmyrov
- Institute for Biological and Medical Imaging (IBMI), Helmholtz Zentrum München, D-85764 Neuherberg, Germany
- Chair of Biological Imaging at the Central Institute for Translational Cancer Research (TranslaTUM), School of Medicine, Technical University of Munich, D-81675 Munich, Germany
| | - George Sergiadis
- Institute for Biological and Medical Imaging (IBMI), Helmholtz Zentrum München, D-85764 Neuherberg, Germany
- Chair of Biological Imaging at the Central Institute for Translational Cancer Research (TranslaTUM), School of Medicine, Technical University of Munich, D-81675 Munich, Germany
- Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences, 215163 Suzhou, China
| | - Vasilis Ntziachristos
- Institute for Biological and Medical Imaging (IBMI), Helmholtz Zentrum München, D-85764 Neuherberg, Germany.
- Chair of Biological Imaging at the Central Institute for Translational Cancer Research (TranslaTUM), School of Medicine, Technical University of Munich, D-81675 Munich, Germany
| |
Collapse
|
42
|
Matthias J, Heink S, Picard F, Zeiträg J, Kolz A, Chao YY, Soll D, de Almeida GP, Glasmacher E, Jacobsen ID, Riedel T, Peters A, Floess S, Huehn J, Baumjohann D, Huber M, Korn T, Zielinski CE. Salt generates antiinflammatory Th17 cells but amplifies pathogenicity in proinflammatory cytokine microenvironments. J Clin Invest 2021; 130:4587-4600. [PMID: 32484796 DOI: 10.1172/jci137786] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Accepted: 05/14/2020] [Indexed: 12/16/2022] Open
Abstract
Th cells integrate signals from their microenvironment to acquire distinct specialization programs for efficient clearance of diverse pathogens or for immunotolerance. Ionic signals have recently been demonstrated to affect T cell polarization and function. Sodium chloride (NaCl) was proposed to accumulate in peripheral tissues upon dietary intake and to promote autoimmunity via the Th17 cell axis. Here, we demonstrate that high-NaCl conditions induced a stable, pathogen-specific, antiinflammatory Th17 cell fate in human T cells in vitro. The p38/MAPK pathway, involving NFAT5 and SGK1, regulated FoxP3 and IL-17A expression in high-NaCl conditions. The NaCl-induced acquisition of an antiinflammatory Th17 cell fate was confirmed in vivo in an experimental autoimmune encephalomyelitis (EAE) mouse model, which demonstrated strongly reduced disease symptoms upon transfer of T cells polarized in high-NaCl conditions. However, NaCl was coopted to promote murine and human Th17 cell pathogenicity, if T cell stimulation occurred in a proinflammatory and TGF-β-low cytokine microenvironment. Taken together, our findings reveal a context-dependent, dichotomous role for NaCl in shaping Th17 cell pathogenicity. NaCl might therefore prove beneficial for the treatment of chronic inflammatory diseases in combination with cytokine-blocking drugs.
Collapse
Affiliation(s)
- Julia Matthias
- Institute of Virology, Technical University of Munich, Munich, Germany.,German Center for Infection Research, Partner Site Munich, Munich, Germany.,Department of Cellular Immunoregulation, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Sylvia Heink
- Klinikum rechts der Isar, Department of Experimental Neuroimmunology, Technical University of Munich, Munich, Germany.,Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Felix Picard
- Institute for Medical Microbiology and Hygiene, University of Marburg, Marburg, Germany
| | - Julia Zeiträg
- Institute for Immunology, Biomedical Center, Faculty of Medicine, Ludwig Maximilian University of Munich (LMU Munich), Planegg-Martinsried, Germany
| | - Anna Kolz
- Institute of Clinical Neuroimmunology, Hospital and Biomedical Center of LMU Munich, Planegg-Martinsried, Germany
| | - Ying-Yin Chao
- Institute of Virology, Technical University of Munich, Munich, Germany.,German Center for Infection Research, Partner Site Munich, Munich, Germany.,TranslaTUM, Technical University of Munich, Munich, Germany
| | - Dominik Soll
- Institute of Virology, Technical University of Munich, Munich, Germany.,German Center for Infection Research, Partner Site Munich, Munich, Germany
| | - Gustavo P de Almeida
- Institute of Virology, Technical University of Munich, Munich, Germany.,German Center for Infection Research, Partner Site Munich, Munich, Germany.,TranslaTUM, Technical University of Munich, Munich, Germany
| | - Elke Glasmacher
- Roche Innovation Center Munich, pRED, Large Molecule Research, Penzberg, Germany
| | - Ilse D Jacobsen
- Research Group Microbial Immunology, Leibniz Institute for Natural Product Research and Infection Biology - Hans Knöll Institute, Jena, Germany.,Institute of Microbiology, Friedrich Schiller University, Jena, Germany
| | - Thomas Riedel
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig and German Center for Infection Research, Partner Site Hannover-Braunschweig, Hannover-Braunschweig, Germany
| | - Anneli Peters
- Institute of Clinical Neuroimmunology, Hospital and Biomedical Center of LMU Munich, Planegg-Martinsried, Germany
| | - Stefan Floess
- Department of Experimental Immunology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Jochen Huehn
- Department of Experimental Immunology, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Dirk Baumjohann
- Institute for Immunology, Biomedical Center, Faculty of Medicine, Ludwig Maximilian University of Munich (LMU Munich), Planegg-Martinsried, Germany
| | - Magdalena Huber
- Institute for Medical Microbiology and Hygiene, University of Marburg, Marburg, Germany
| | - Thomas Korn
- Klinikum rechts der Isar, Department of Experimental Neuroimmunology, Technical University of Munich, Munich, Germany.,Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Christina E Zielinski
- Institute of Virology, Technical University of Munich, Munich, Germany.,German Center for Infection Research, Partner Site Munich, Munich, Germany.,Department of Cellular Immunoregulation, Charité - Universitätsmedizin Berlin, Berlin, Germany.,TranslaTUM, Technical University of Munich, Munich, Germany
| |
Collapse
|
43
|
Amini A, Pang D, Hackstein CP, Klenerman P. MAIT Cells in Barrier Tissues: Lessons from Immediate Neighbors. Front Immunol 2020; 11:584521. [PMID: 33329559 PMCID: PMC7734211 DOI: 10.3389/fimmu.2020.584521] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 10/26/2020] [Indexed: 12/12/2022] Open
Abstract
Mucosal-associated invariant T (MAIT) cells are innate-like T cells present at considerable frequencies in human blood and barrier tissues, armed with an expanding array of effector functions in response to homeostatic perturbations. Analogous to other barrier immune cells, their phenotype and function is driven by crosstalk with host and dynamic environmental factors, most pertinently the microbiome. Given their distribution, they must function in diverse extracellular milieus. Tissue-specific and adapted functions of barrier immune cells are shaped by transcriptional programs and regulated through a blend of local cellular, inflammatory, physiological, and metabolic mediators unique to each microenvironment. This review compares the phenotype and function of MAIT cells with other barrier immune cells, highlighting potential areas for future exploration. Appreciation of MAIT cell biology within tissues is crucial to understanding their niche in health and disease.
Collapse
Affiliation(s)
- Ali Amini
- Translational Gastroenterology Unit, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Peter Medawar Building for Pathogen Research, University of Oxford, Oxford, United Kingdom
| | - Declan Pang
- Peter Medawar Building for Pathogen Research, University of Oxford, Oxford, United Kingdom
| | - Carl-Philipp Hackstein
- Translational Gastroenterology Unit, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Peter Medawar Building for Pathogen Research, University of Oxford, Oxford, United Kingdom
| | - Paul Klenerman
- Translational Gastroenterology Unit, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Peter Medawar Building for Pathogen Research, University of Oxford, Oxford, United Kingdom
| |
Collapse
|
44
|
Cerboni S, Gehrmann U, Preite S, Mitra S. Cytokine-regulated Th17 plasticity in human health and diseases. Immunology 2020; 163:3-18. [PMID: 33064842 DOI: 10.1111/imm.13280] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 09/30/2020] [Accepted: 10/04/2020] [Indexed: 02/06/2023] Open
Abstract
Upon activation, naïve CD4+ T helper (Th) cells differentiate into distinct Th effector cell lineages depending on the local cytokine environment. However, these polarized Th cells can also adapt their function and phenotype depending on the changing cytokine environment, demonstrating functional plasticity. Here, Th17 cells, which play a critical role in host protection from extracellular pathogens and in autoimmune disorders, are of particular interest. While being able to shift phenotype within their lineage, Th17 cells can also acquire characteristics of Th1, Th2, T follicular helper (Tfh) or regulatory T cells. Th17 cell identity is determined by a spectrum of extracellular signals, including cytokines, which are critical orchestrators of cellular immune responses. Cytokine induces changes in epigenetic, transcriptional, translational and metabolomic parameters. How these signals are integrated to determine Th17 plasticity is not well defined, yet this is a crucial point of investigation as it represents a potential target to treat autoimmune and inflammatory diseases. The goal of this review was to discuss how cytokines regulate intracellular networks, focusing on the regulation of lineage-specific transcription factors, chromatin remodelling and metabolism, to control human Th17 cell plasticity. We discuss the importance of Th17 plasticity in autoimmunity and cancer and present current strategies and challenges in targeting pathogenic Th17 cells with cytokine-based approaches, considering human genetic variants associated with altered Th17 differentiation. Finally, we discuss how modulating Th17 plasticity rather than targeting the Th17 lineage as a whole might preserve its essential immune function while purging its adverse effects.
Collapse
Affiliation(s)
- Silvia Cerboni
- Translational Science and Experimental Medicine, Research and Early Development, Respiratory and Immunology (R&I, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Ulf Gehrmann
- Translational Science and Experimental Medicine, Research and Early Development, Respiratory and Immunology (R&I, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Silvia Preite
- Bioscience, In vivo, Research and Early Development, Respiratory & Immunology (R&I, BioPharmaceuticals R&D, AstraZeneca, Gothenburg, Sweden
| | - Suman Mitra
- CNRS, INSERM, CHU Lille, Institut pour la Recherche contre le Cancer de Lille, UMR9020 - UMR-S 1277 - CANTHER - Cancer Heterogeneity, Plasticity and Resistance to Therapies, Univ. Lille, Lille, France
| |
Collapse
|
45
|
Liu Y, Li Z, Hao J, Chen H, Hou T, Hao H. Circular RNAs associated with a mouse model of concanavalin A-induced autoimmune hepatitis: preliminary screening and comprehensive functional analysis. FEBS Open Bio 2020; 10:2350-2362. [PMID: 32965791 PMCID: PMC7609805 DOI: 10.1002/2211-5463.12981] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/27/2020] [Accepted: 09/15/2020] [Indexed: 12/20/2022] Open
Abstract
Without treatment, autoimmune hepatitis (AIH) often leads to cirrhosis, liver failure and, in some cases, death. However, the pathogenesis of AIH remains incompletely understood. Here, we explored the relationship between differentially expressed circular RNAs (DECs) and development of AIH by obtaining an expression profile of DECs in a concanavalin A‐induced AIH mouse model by microarray. In total, we identified 27 DECs; the host genes of these DECs were annotated with 140 Gene Ontology terms and 19 pathways, revealing potential roles in the metabolism of cellular ions and regulation of protein expression, as well as possible involvement in endocytosis and apoptosis. We constructed a circular RNA–microRNA network that was used to infer that a mmu_circ_0001520/mmu‐miR‐193b‐3p/MAPK10 network may be associated with the occurrence of AIH. These findings may help lay the foundation for validation of the potential roles of circular RNAs in AIH.
Collapse
Affiliation(s)
- Yang Liu
- College of Basic Medical Sciences, Shanxi University of Chinese Medicine, Jinzhong, China.,Basic Laboratory of Integrated Traditional Chinese and Western Medicine, Shanxi University of Chinese Medicine, Jinzhong, China
| | - Zhencheng Li
- College of Basic Medical Sciences, Shanxi University of Chinese Medicine, Jinzhong, China.,Basic Laboratory of Integrated Traditional Chinese and Western Medicine, Shanxi University of Chinese Medicine, Jinzhong, China
| | - Jianheng Hao
- College of Basic Medical Sciences, Shanxi University of Chinese Medicine, Jinzhong, China.,Basic Laboratory of Integrated Traditional Chinese and Western Medicine, Shanxi University of Chinese Medicine, Jinzhong, China
| | - Hao Chen
- College of Basic Medical Sciences, Shanxi University of Chinese Medicine, Jinzhong, China.,Basic Laboratory of Integrated Traditional Chinese and Western Medicine, Shanxi University of Chinese Medicine, Jinzhong, China
| | - Tiezheng Hou
- College of Basic Medical Sciences, Shanxi University of Chinese Medicine, Jinzhong, China.,Basic Laboratory of Integrated Traditional Chinese and Western Medicine, Shanxi University of Chinese Medicine, Jinzhong, China
| | - Huiqin Hao
- College of Basic Medical Sciences, Shanxi University of Chinese Medicine, Jinzhong, China.,Basic Laboratory of Integrated Traditional Chinese and Western Medicine, Shanxi University of Chinese Medicine, Jinzhong, China
| |
Collapse
|
46
|
Kamaldinov T, Hahn MS. Dual Bioelectrical Assessment of Human Mesenchymal Stem Cells Using Plasma and Mitochondrial Membrane Potentiometric Probes. Bioelectricity 2020; 2:238-250. [PMID: 34476356 DOI: 10.1089/bioe.2020.0006] [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: 11/12/2022] Open
Abstract
Background: Bioelectrical properties are known to impact stem cell fate, state, and function. However, assays that measure bioelectrical properties are generally limited to the plasma membrane potential. In this study, we propose an assay to simultaneously assess cell plasma membrane and mitochondrial membrane potentials. Materials and Methods: Mesenchymal stem cell (MSC) plasma and mitochondrial membrane potentials were measured using flow cytometry and a combination of tetramethylrhodamine, methyl ester (TMRM), and bis-(1,3-dibutylbarbituric acid)trimethine oxonol (DiBAC) dyes. We investigated the shifts in the bioelectrical phenotype of MSCs due to extended culture in vitro, activation with interferon-gamma (IFN-γ), and aggregate conditions. Results: MSCs subjected to extended culture in vitro acquired plasma and mitochondrial membrane potentials consistent with a hyperpolarized bioelectrical phenotype. Activation with IFN-γ shifted MSCs toward a state associated with increased levels of both DiBAC and TMRM. MSCs in aggregate conditions were associated with a decrease in TMRM levels, indicating mitochondrial depolarization. Conclusions: Our proposed assay described distinct MSC bioelectrical transitions due to extended in vitro culture, exposure to an inflammatory cytokine, and culture under aggregate conditions. Overall, our assay enables a more complete characterization of MSC bioelectrical properties within a single experiment, and its relative simplicity enables researchers to apply it in variety of settings.
Collapse
Affiliation(s)
- Timothy Kamaldinov
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York, USA
| | - Mariah S Hahn
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York, USA
| |
Collapse
|
47
|
Evans RDR, Antonelou M, Sathiananthamoorthy S, Rega M, Henderson S, Ceron-Gutierrez L, Barcenas-Morales G, Müller CA, Doffinger R, Walsh SB, Salama AD. Inherited salt-losing tubulopathies are associated with immunodeficiency due to impaired IL-17 responses. Nat Commun 2020; 11:4368. [PMID: 32868758 PMCID: PMC7459119 DOI: 10.1038/s41467-020-18184-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 08/10/2020] [Indexed: 02/07/2023] Open
Abstract
Increased extracellular sodium activates Th17 cells, which provide protection from bacterial and fungal infections. Whilst high salt diets have been shown to worsen autoimmune disease, the immunological consequences of clinical salt depletion are unknown. Here, we investigate immunity in patients with inherited salt-losing tubulopathies (SLT). Forty-seven genotyped SLT patients (with Bartter, Gitelman or EAST Syndromes) are recruited. Clinical features of dysregulated immunity are recorded with a standardised questionnaire and immunological investigations of IL-17 responsiveness undertaken. The effects of altering extracellular ionic concentrations on immune responses are then assessed. Patients are hypokalaemic and hypomagnesaemic, with reduced interstitial sodium stores determined by 23Na-magnetic resonance imaging. SLT patients report increased mucosal infections and allergic disease compared to age-matched controls. Aligned with their clinical phenotype, SLT patients have an increased ratio of Th2:Th17 cells. SLT Th17 and Tc17 polarisation is reduced in vitro, yet STAT1 and STAT3 phosphorylation and calcium flux following T cell activation are unaffected. In control cells, the addition of extracellular sodium (+40 mM), potassium (+2 mM), or magnesium (+1 mM) reduces Th2:Th17 ratio and augments Th17 polarisation. Our results thus show that the ionic environment typical in SLT impairs IL-17 immunity, but the intracellular pathways that mediate salt-driven Th17 polarisation are intact and in vitro IL-17 responses can be reinvigorated by increasing extracellular sodium concentration. Whether better correction of extracellular ions can rescue the immunophenotype in vivo in SLT patients remains unknown. Salt levels in culture affect the polarisation of Th17 cells, which normally protect the host from fungal and bacterial infections. Here, the authors study patients with salt-losing tubulopathies (SLT) to find that, while Th17 immunity is dampened in SLT patients, their Th17-inducing signaling pathways are intact and can be reinvigorated by exogenous salt.
Collapse
Affiliation(s)
- Rhys D R Evans
- Department of Renal Medicine, University College London, Royal Free Hospital, London, UK.
| | - Marilina Antonelou
- Department of Renal Medicine, University College London, Royal Free Hospital, London, UK
| | | | - Marilena Rega
- Institute of Nuclear Medicine, University College London, University College London Hospital, London, UK
| | - Scott Henderson
- Department of Renal Medicine, University College London, Royal Free Hospital, London, UK
| | | | | | - Christoph A Müller
- Department of Radiology, Medical Physics, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, 79106, Freiburg, Germany.,German Consortium for Translational Cancer Research (DKTK), Partner site Freiburg, German Center for Cancer Research (DKFZ), 69120, Heidelberg, Germany
| | - Rainer Doffinger
- Department of Clinical Biochemistry and Immunology, Addenbrookes's Hospital, Cambridge, UK.,National Institute of Health Research (NIHR), Cambridge Biomedical Research Centre, Cambridge, UK
| | - Stephen B Walsh
- Department of Renal Medicine, University College London, Royal Free Hospital, London, UK.
| | - Alan D Salama
- Department of Renal Medicine, University College London, Royal Free Hospital, London, UK.
| |
Collapse
|
48
|
Neubert P, Homann A, Wendelborn D, Bär AL, Krampert L, Trum M, Schröder A, Ebner S, Weichselbaum A, Schatz V, Linz P, Veelken R, Schulte-Schrepping J, Aschenbrenner AC, Quast T, Kurts C, Geisberger S, Kunzelmann K, Hammer K, Binger KJ, Titze J, Müller DN, Kolanus W, Schultze JL, Wagner S, Jantsch J. NCX1 represents an ionic Na+ sensing mechanism in macrophages. PLoS Biol 2020; 18:e3000722. [PMID: 32569301 PMCID: PMC7307728 DOI: 10.1371/journal.pbio.3000722] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 05/22/2020] [Indexed: 01/20/2023] Open
Abstract
Inflammation and infection can trigger local tissue Na+ accumulation. This Na+-rich environment boosts proinflammatory activation of monocyte/macrophage-like cells (MΦs) and their antimicrobial activity. Enhanced Na+-driven MΦ function requires the osmoprotective transcription factor nuclear factor of activated T cells 5 (NFAT5), which augments nitric oxide (NO) production and contributes to increased autophagy. However, the mechanism of Na+ sensing in MΦs remained unclear. High extracellular Na+ levels (high salt [HS]) trigger a substantial Na+ influx and Ca2+ loss. Here, we show that the Na+/Ca2+ exchanger 1 (NCX1, also known as solute carrier family 8 member A1 [SLC8A1]) plays a critical role in HS-triggered Na+ influx, concomitant Ca2+ efflux, and subsequent augmented NFAT5 accumulation. Moreover, interfering with NCX1 activity impairs HS-boosted inflammatory signaling, infection-triggered autolysosome formation, and subsequent antibacterial activity. Taken together, this demonstrates that NCX1 is able to sense Na+ and is required for amplifying inflammatory and antimicrobial MΦ responses upon HS exposure. Manipulating NCX1 offers a new strategy to regulate MΦ function.
Collapse
Affiliation(s)
- Patrick Neubert
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| | - Arne Homann
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| | - David Wendelborn
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| | - Anna-Lorena Bär
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| | - Luka Krampert
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| | - Maximilian Trum
- Department of Internal Medicine II, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| | - Agnes Schröder
- Institute of Orthodontics, University Hospital of Regensburg, Regensburg, Germany
| | - Stefan Ebner
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
- Max Planck Institute of Biochemistry, Martinsried, Germany
| | - Andrea Weichselbaum
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| | - Valentin Schatz
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| | - Peter Linz
- Institute of Radiology, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Roland Veelken
- Department of Internal Medicine 4, University Hospital Erlangen, Erlangen, Germany
| | - Jonas Schulte-Schrepping
- Department for Genomics and Immunoregulation, Life and Medical Sciences (LIMES) Institute, University of Bonn, Bonn, Germany
| | - Anna C. Aschenbrenner
- Department for Genomics and Immunoregulation, Life and Medical Sciences (LIMES) Institute, University of Bonn, Bonn, Germany
- Department of Internal Medicine and Radboud Center for Infectious Diseases (RCI), Radboud University Medical Center, Nijmegen, the Netherlands
| | - Thomas Quast
- Molecular Immunology and Cell Biology LIMES Institute, University of Bonn, Bonn, Germany
| | - Christian Kurts
- Institute of Experimental Immunology, University of Bonn, Bonn, Germany
| | - Sabrina Geisberger
- Experimental and Clinical Research Center (ECRC), a cooperation of Charité-Universitätsmedizin Berlin and Max Delbruck Center for Molecular Medicine, Berlin, Germany
- Max Delbruck Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
| | - Karl Kunzelmann
- Institute of Physiology, University of Regensburg, Regensburg, Germany
| | - Karin Hammer
- Department of Internal Medicine II, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| | - Katrina J. Binger
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Bundoora, Australia
| | - Jens Titze
- Cardiovascular and Metabolic Disorders, Duke-NUS Medical School, Singapore
| | - Dominik N. Müller
- Experimental and Clinical Research Center (ECRC), a cooperation of Charité-Universitätsmedizin Berlin and Max Delbruck Center for Molecular Medicine, Berlin, Germany
- Max Delbruck Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
| | - Waldemar Kolanus
- Molecular Immunology and Cell Biology LIMES Institute, University of Bonn, Bonn, Germany
| | - Joachim L. Schultze
- Department for Genomics and Immunoregulation, Life and Medical Sciences (LIMES) Institute, University of Bonn, Bonn, Germany
- Platform for Single Cell Genomics & Epigenomics at the German Center for Neurodegenerative Diseases (DZNE) and the University of Bonn, Bonn, Germany
| | - Stefan Wagner
- Department of Internal Medicine II, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| | - Jonathan Jantsch
- Institute of Clinical Microbiology and Hygiene, University Hospital of Regensburg and University of Regensburg, Regensburg, Germany
| |
Collapse
|
49
|
Jobin K, Stumpf NE, Schwab S, Eichler M, Neubert P, Rauh M, Adamowski M, Babyak O, Hinze D, Sivalingam S, Weisheit C, Hochheiser K, Schmidt SV, Meissner M, Garbi N, Abdullah Z, Wenzel U, Hölzel M, Jantsch J, Kurts C. A high-salt diet compromises antibacterial neutrophil responses through hormonal perturbation. Sci Transl Med 2020; 12:12/536/eaay3850. [DOI: 10.1126/scitranslmed.aay3850] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 02/12/2020] [Indexed: 12/11/2022]
Abstract
The Western diet is rich in salt, which poses various health risks. A high-salt diet (HSD) can stimulate immunity through the nuclear factor of activated T cells 5 (Nfat5)–signaling pathway, especially in the skin, where sodium is stored. The kidney medulla also accumulates sodium to build an osmotic gradient for water conservation. Here, we studied the effect of an HSD on the immune defense against uropathogenic E. coli–induced pyelonephritis, the most common kidney infection. Unexpectedly, pyelonephritis was aggravated in mice on an HSD by two mechanisms. First, on an HSD, sodium must be excreted; therefore, the kidney used urea instead to build the osmotic gradient. However, in contrast to sodium, urea suppressed the antibacterial functionality of neutrophils, the principal immune effectors against pyelonephritis. Second, the body excretes sodium by lowering mineralocorticoid production via suppressing aldosterone synthase. This caused an accumulation of aldosterone precursors with glucocorticoid functionality, which abolished the diurnal adrenocorticotropic hormone–driven glucocorticoid rhythm and compromised neutrophil development and antibacterial functionality systemically. Consistently, under an HSD, systemic Listeria monocytogenes infection was also aggravated in a glucocorticoid-dependent manner. Glucocorticoids directly induced Nfat5 expression, but pharmacological normalization of renal Nfat5 expression failed to restore the antibacterial defense. Last, healthy humans consuming an HSD for 1 week showed hyperglucocorticoidism and impaired antibacterial neutrophil function. In summary, an HSD suppresses intrarenal neutrophils Nfat5-independently by altering the local microenvironment and systemically by glucocorticoid-mediated immunosuppression. These findings argue against high-salt consumption during bacterial infections.
Collapse
Affiliation(s)
- Katarzyna Jobin
- Institute of Experimental Immunology, University Hospital of Bonn, Rheinische Friedrich Wilhelm University, 53127 Bonn, Germany
- Institute for Systems Immunology, Julius Maximilian University of Würzburg, Würzburg, Germany
| | - Natascha E. Stumpf
- Institute of Experimental Immunology, University Hospital of Bonn, Rheinische Friedrich Wilhelm University, 53127 Bonn, Germany
| | - Sebastian Schwab
- Institute of Experimental Immunology, University Hospital of Bonn, Rheinische Friedrich Wilhelm University, 53127 Bonn, Germany
- Medizinische Klinik I, University Hospital of Bonn, Rheinische Friedrich Wilhelm University, 53127 Bonn, Germany
| | - Melanie Eichler
- Institute of Experimental Immunology, University Hospital of Bonn, Rheinische Friedrich Wilhelm University, 53127 Bonn, Germany
| | - Patrick Neubert
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany
| | - Manfred Rauh
- Department of Pediatrics and Adolescent Medicine, University Hospital Erlangen, Loschgestraβe 15, 91054 Erlangen, Germany
| | - Marek Adamowski
- Institute of Experimental Immunology, University Hospital of Bonn, Rheinische Friedrich Wilhelm University, 53127 Bonn, Germany
| | - Olena Babyak
- Institute of Experimental Immunology, University Hospital of Bonn, Rheinische Friedrich Wilhelm University, 53127 Bonn, Germany
| | - Daniel Hinze
- Institute of Experimental Oncology, University Hospital of Bonn, Rheinische Friedrich Wilhelm University, Bonn, Germany
| | - Sugirthan Sivalingam
- Institute of Experimental Oncology, University Hospital of Bonn, Rheinische Friedrich Wilhelm University, Bonn, Germany
| | - Christina Weisheit
- Institute of Experimental Immunology, University Hospital of Bonn, Rheinische Friedrich Wilhelm University, 53127 Bonn, Germany
- Department of Anesthesiology and Intensive Care Medicine, University Hospital of Bonn, Rheinische Friedrich Wilhelm University, 53127 Bonn, Germany
| | - Katharina Hochheiser
- Institute of Experimental Immunology, University Hospital of Bonn, Rheinische Friedrich Wilhelm University, 53127 Bonn, Germany
| | - Susanne V. Schmidt
- Institute of Innate Immunity, University Hospital of Bonn, Rheinische Friedrich Wilhelm University, 53127 Bonn, Germany
| | - Mirjam Meissner
- Institute of Experimental Immunology, University Hospital of Bonn, Rheinische Friedrich Wilhelm University, 53127 Bonn, Germany
| | - Natalio Garbi
- Institute of Experimental Immunology, University Hospital of Bonn, Rheinische Friedrich Wilhelm University, 53127 Bonn, Germany
| | - Zeinab Abdullah
- Institute of Experimental Immunology, University Hospital of Bonn, Rheinische Friedrich Wilhelm University, 53127 Bonn, Germany
| | - Ulrich Wenzel
- Department of Medicine, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany
| | - Michael Hölzel
- Institute of Experimental Oncology, University Hospital of Bonn, Rheinische Friedrich Wilhelm University, Bonn, Germany
| | - Jonathan Jantsch
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany
| | - Christian Kurts
- Institute of Experimental Immunology, University Hospital of Bonn, Rheinische Friedrich Wilhelm University, 53127 Bonn, Germany
- Department of Microbiology and Immunology at the Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, VIC 3010, Australia
| |
Collapse
|
50
|
Kamaldinov T, Erndt-Marino J, Levin M, Kaplan DL, Hahn MS. Assessment of Enrichment of Human Mesenchymal Stem Cells Based on Plasma and Mitochondrial Membrane Potentials. Bioelectricity 2020; 2:21-32. [PMID: 32292894 DOI: 10.1089/bioe.2019.0024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Background: Human mesenchymal stem cells (hMSCs) are utilized preclinically and clinically as a candidate cell therapy for a wide range of inflammatory and degenerative diseases. Despite promising results in early clinical trials, consistent outcomes with hMSC-based therapies have proven elusive in many of these applications. In this work, we attempt to address this limitation through the design of a stem cell therapy to enrich hMSCs for desired electrical and ionic properties with enhanced stemness and immunomodulatory/regenerative capacity. Materials and Methods: In this study, we sought to develop initial protocols to achieve electrically enriched hMSCs (EE-hMSCs) with distinct electrical states and assess the potential relationship with respect to hMSC state and function. We sorted hMSCs based on fluorescence intensity of tetramethylrhodamine ethyl ester (TMRE) and investigated phenotypic differences between the sorted populations. Results: Subpopulations of EE-hMSCs exhibit differential expression of genes associated with senescence, stemness, immunomodulation, and autophagy. EE-hMSCs with low levels of TMRE, indicative of depolarized membrane potential, have reduced mRNA expression of senescence-associated markers, and increased mRNA expression of autophagy and immunomodulatory markers relative to EE-hMSCs with high levels of TMRE (hyperpolarized). Conclusions : This work suggests that the utilization of EE-hMSCs may provide a novel strategy for cell therapies, enabling live cell enrichment for distinct phenotypes that can be exploited for different therapeutic outcomes.
Collapse
Affiliation(s)
- Timothy Kamaldinov
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York
| | - Josh Erndt-Marino
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York.,Department of Biomedical Engineering, Tufts University, Medford, Massachusetts.,Allen Discovery Center at Tufts University, Department of Biology, Tufts University, Medford, Massachusetts
| | - Michael Levin
- Allen Discovery Center at Tufts University, Department of Biology, Tufts University, Medford, Massachusetts
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, Massachusetts.,Allen Discovery Center at Tufts University, Department of Biology, Tufts University, Medford, Massachusetts
| | - Mariah S Hahn
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York
| |
Collapse
|