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Głogowski T, Wojtaszek E, Malyszko J. Iron status and anemia control are related to peritoneal membrane properties in peritoneally dialyzed patients. Front Med (Lausanne) 2023; 10:1148094. [PMID: 37484854 PMCID: PMC10359623 DOI: 10.3389/fmed.2023.1148094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 06/19/2023] [Indexed: 07/25/2023] Open
Abstract
Background Characteristics of peritoneal membrane is unique and individually different in peritoneal dialysis patients. Relationship between specific nature of peritoneal transport, anemia and inflammation has not yet been extensively studied. We attempted to outline the complex interplay of several biomarkers of iron status and their association with peritoneal transport, degree of inflammation and residual renal function. Methods A total of 58 patients treated with peritoneal dialysis either CAPD or APD for at least 3 months were enrolled in this study. Full blood count, traditional markers of iron status (transferrin saturation-TSAT and ferritin), serum erythroferrone-ERFE, soluble transferrin receptor (sTfR), hepcidin, zonulin, growth differentiation factor -15 (GDF15), IL-16, hsCRP and hypoxia-inducible factor-α (HIF-1-α; in serum and dialysate) were measured using commercially available tests. We also performed Peritoneal Equilibrium Test and assessed GFR level. Results Hb levels above 10 g/dL was found in 74% of patients. Hb levels positively correlated with residual renal function and nutritional status. Adequate iron status was diagnosed in 69% of subjects, only in 9% of patients, criteria for absolute iron deficiency were met. Serum ERFE correlated inversely with hepcidin levels but was not associated with erythropoietin stimulating agent dose. Peritoneal transport had strong correlation with dialysate sTfR (p < 0.05), dialysate hepcidin (p < 0.05), dialysate GDF15 (p < 0.01) and dialysate zonulin (p < 0.001) levels, as well as serum IL6 (p = 0.03), serum hs-CRP (p = 0.04) and dialysate hs-CRP (p = 0.04). Conclusion Residual kidney function contributes considerably to better control of anemia. Various degree of inflammation is inherent to PD patients. Additionally, fast-average peritoneal transport is associated with greater degree of inflammation and higher concentration of markers of iron status, GDF15 and zonulin in dialysate. This finding may indicate more effective clearance of higher-range middle molecules in fast-average transporters. The role of ERFE as a marker of erythropoiesis in PD patients requires further investigation.
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Daneshvar M, Yadegari A, Ribaldone DG, Hasanzadeh M, Djafarian K. Zonulin levels in complicated pregnancy: a systematic review and meta-analysis. J OBSTET GYNAECOL 2022; 42:2621-2628. [PMID: 36094006 DOI: 10.1080/01443615.2022.2114822] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Zonulin is a novel biomarker of intestinal permeability. The existing data suggest that upregulation of zonulin might be linked to systemic inflammation and pregnancy complications. A systematic search was performed in medical electronic databases to identify eligible studies that reported circulating zonulin levels in complicated pregnancies compared to controls. Eight studies with 1196 serum samples of pregnant women were included in the systematic review. Meta-analysis on four studies revealed a significant increase in serum zonulin in women with Gestational diabetes mellitus (GDM) compared to healthy controls (Cohen's d = 2.06; 95% Confidence Interval (CI): 0.15, 3.98). By pooling four studies that investigated zonulin levels in Hypertensive disorders of pregnancy (HDP), higher zonulin concentrations were found in cases, while the difference was not significant (Cohen's d = 0.86; 95% CI: -0.04, 1.75). Current evidence suggests that higher levels of zonulin during pregnancy seem to be associated with inflammation-related complications, including GDM and HDP.Impact StatementWhat is already known on this subject? Increased zonulin levels are considered as a marker of intestinal hyper-permeability. Upregulation of zonulin and concurrent systemic inflammation, are known to be associated with some pregnancy complications.What do the results of this study add? We performed a meta-analysis to evaluate changes in serum zonulin levels in pregnancies complicated with Gestational diabetes mellitus (GDM), Hypertensive disorders of pregnancy (HDP), and Intrahepatic cholestasis of pregnancy (ICP). According to our results, zonulin levels were significantly higher in complicated pregnancies than in normal pregnancies, particularly for GDM.What are the implications of these findings for clinical practice and/or further research? Our findings revealed a probable association between increased zonulin levels and inflammation-related complications during pregnancy. Moreover, zonulin could serve as a reliable diagnostic clinical biomarker to identify (or predict) complications during pregnancy. Further studies are needed to examine the clinical accuracy of zonulin for detecting pregnancy-related complications.
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Affiliation(s)
- Mojtaba Daneshvar
- Department of Community Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences (TUMS), Tehran, Iran.,Nutritional Health Team (NHT), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Anahita Yadegari
- Nutritional Health Team (NHT), Universal Scientific Education and Research Network (USERN), Tehran, Iran.,Department of Nutrition, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | | | - Mohaddeseh Hasanzadeh
- Nutritional Health Team (NHT), Universal Scientific Education and Research Network (USERN), Tehran, Iran.,Department of Nutrition, Islamic Azad University, Sarvestan Branch, Sarvestan, Iran
| | - Kurosh Djafarian
- Nutritional Health Team (NHT), Universal Scientific Education and Research Network (USERN), Tehran, Iran.,Department of Clinical Nutrition, Tehran University of Medical Sciences, Tehran, Iran
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3
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Carpes LS, Nicoletto BB, Canani LH, Rheinhemer J, Crispim D, Souza GC. Could serum zonulin be an intestinal permeability marker in diabetes kidney disease? PLoS One 2021; 16:e0253501. [PMID: 34170951 PMCID: PMC8232531 DOI: 10.1371/journal.pone.0253501] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 06/06/2021] [Indexed: 12/31/2022] Open
Abstract
Zonulin is a protein associated with the tight junction complex opening at the intestinal epithelium, previously linked to obesity, cardiovascular diseases, type 2 diabetes mellitus (T2DM) and chronic kidney disease (CKD). However, its role in CKD has not been totally elucidated. This study aimed to evaluate zonulin levels in subjects with diabetic kidney disease (DKD). This case-control study included two cases groups: 1) Advanced DKD cases: T2DM patients with estimated glomerular filtration rate (eGFR) <60ml/min/1.73m2; 2) Albuminuric T2DM cases: diabetic patients with urinary albumin excretion (UAE) >30mg/g creatinine, but with eGFR>60ml/min/1.73m2. Two control groups were also included: 1) T2DM controls: patients with T2DM without impaired kidney function; 2) Non-T2DM controls: subjects without T2DM and normal renal function. Serum levels of zonulin were measured by ELISA. Eighty-six individuals were included. Zonulin levels was different among study groups (P = 0.003). T2DM controls presented higher zonulin levels than non-T2DM controls [(131.35 (83.0–170.5) vs. 87.25 (54.7–111.8), P = 0.018] and advanced DKD cases [63.72 (45.03–106.0); P = 0.007]. Zonulin showed a positive correlation with eGFR (r = 0.222; P = 0.040), total cholesterol (r = 0.299; P = 0.034), LDL (r = 0.258; P = 0.021), and negative with albuminuria (r = -0.243; P = 0.024) and body fat (r = -0.271; P = 0.014). In the multivariate logistic regression analyses, zonulin levels were independently associated to renal outcomes [OR 0.99 (0.98–0.99, P = 0.012)] after 5-year inclusion. In conclusion, increased zonulin levels in patients with TD2M without renal disease suggest an impaired intestinal permeability. Moreover, its association with renal outcomes could indicate its use as a disease monitoring marker. However, the mechanisms behind this association should be better understood.
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Affiliation(s)
- Larissa Salomoni Carpes
- Faculty of Medicine, Post Graduate Program in Food, Nutrition and Health, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | | | - Luis Henrique Canani
- Faculty of Medicine, Post Graduate Program in Medical Sciences: Endocrinology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
- Endocrine Division, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Jakeline Rheinhemer
- Faculty of Medicine, Post Graduate Program in Medical Sciences: Endocrinology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Daisy Crispim
- Faculty of Medicine, Post Graduate Program in Medical Sciences: Endocrinology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
- Endocrine Division, Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil
| | - Gabriela Corrêa Souza
- Faculty of Medicine, Post Graduate Program in Food, Nutrition and Health, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
- Food and Nutrition Research Center, Hospital de Clínicas de Porto Alegre, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
- * E-mail:
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4
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Yu J, Shen Y, Zhou N. Advances in the role and mechanism of zonulin pathway in kidney diseases. Int Urol Nephrol 2021; 53:2081-2088. [PMID: 33428167 DOI: 10.1007/s11255-020-02756-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Accepted: 12/15/2020] [Indexed: 10/22/2022]
Abstract
The intestinal barrier is the first line of defense against foreign antigens. Tight junctions play an important role in maintaining the function of the intestinal wall. Zonulin is the only physiological protein discovered in recent years that can reversibly regulate tight junctions in human body. It changes the permeability of intestinal epithelial cells by regulating the state of tight junctions. Increased intestinal permeability can lead to abnormal activation of intestinal mucosal immune and bacterial translocation, then inducing systemic inflammation. It has already been reported that zonulin plays an important pathogenic role in a variety of diseases by regulating tight junctions leading to an abnormal increase of intestinal permeability. However, the research on the pathogenic role and mechanism of zonulin pathway in kidney disease is still in its infancy. Therefore, we reviewed the progress on pathophysiological characteristics of zonulin as well as the pathogenesis of zonulin in kidney disease in this paper.
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Affiliation(s)
- Jie Yu
- Department of Nephrology, Beijing Children's Hospital, Capital Medical University, Beijing, China.,National Center for Children's Health (Beijing), Beijing, China
| | - Ying Shen
- Department of Nephrology, Beijing Children's Hospital, Capital Medical University, Beijing, China.,National Center for Children's Health (Beijing), Beijing, China.,Key Laboratory of Chronic Kidney Disease and Blood Purification in Childhood (Beijing), Beijing, China.,Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing, China
| | - Nan Zhou
- Department of Nephrology, Beijing Children's Hospital, Capital Medical University, Beijing, China. .,National Center for Children's Health (Beijing), Beijing, China. .,Key Laboratory of Chronic Kidney Disease and Blood Purification in Childhood (Beijing), Beijing, China. .,Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing, China.
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Bawah AT, Tornyi H, Seini MM, Ngambire LT, Yeboah FA. Zonulin as marker of pregnancy induced hypertension: a case control study. Clin Hypertens 2020; 26:7. [PMID: 32313692 PMCID: PMC7158010 DOI: 10.1186/s40885-020-00139-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 03/03/2020] [Indexed: 12/20/2022] Open
Abstract
Background Zonulin has been implicated in many metabolic disorders including hypertension and obesity. However, there is insufficient information about the involvement of zonulin in pregnancy induced hypertension (PIH) which comprises preeclampsia (PE) and gestational hypertension (GH). This study was therefore aimed at finding the level of this biochemical marker of regulation of tight junctions among women with PIH. Methods A total of 88 women with PIH and 60 age and body mass index (BMI) matched healthy pregnant women controls were enrolled. Blood pressure at 11–13 weeks and after 20 weeks of gestation, body mass index (BMI) in addition to serum Zonulin levels and lipid profile were compared between the groups. Student’s t-test was used for comparisons of the mean between the two groups. Correlation analyses were performed using Pearson’s correlation and binary logistic regression was used to evaluate the factors associated with PIH. Results Zonulin level was significantly higher in the participants with PIH as compared to the normal pregnant controls 56.81 ± 7.72 ng/ml vs 40.4 ± 8.60 ng/ml p < 0.0001 and had strong positive correlation with PIH (OR = 1.805; CI1.139–1.275; p < 0.0001). However, the association between first trimester lipids and PIH was weak. Conclusion The results showed a strong positive correlation between zonulin and PIH, thus changes in intestinal permeability occur in early stages of pregnancy and may be involved in the pathogenesis of PIH.
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Affiliation(s)
- Ahmed Tijani Bawah
- 1Department of Medical Laboratory Sciences, University of Health and Allied Science, PMB 31, Ho, Ghana
| | - Henry Tornyi
- 1Department of Medical Laboratory Sciences, University of Health and Allied Science, PMB 31, Ho, Ghana
| | - Mohammed Mustapha Seini
- 2Department of Molecular Medicine, Kwame Nkrumah University Science and Technology, Kumasi, Ghana
| | - Lincoln Toamsoma Ngambire
- 1Department of Medical Laboratory Sciences, University of Health and Allied Science, PMB 31, Ho, Ghana
| | - Francis Agyemang Yeboah
- 2Department of Molecular Medicine, Kwame Nkrumah University Science and Technology, Kumasi, Ghana
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Ramos CI, Armani RG, Canziani MEF, Dalboni MA, Dolenga CJR, Nakao LS, Campbell KL, Cuppari L. Effect of prebiotic (fructooligosaccharide) on uremic toxins of chronic kidney disease patients: a randomized controlled trial. Nephrol Dial Transplant 2020; 34:1876-1884. [PMID: 29939302 DOI: 10.1093/ndt/gfy171] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 05/02/2018] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND Microbial-derived uremic toxins, p-cresyl sulfate (PCS), indoxyl sulfate (IS) and indole 3-acetic acid (IAA), have been associated with the burden of chronic kidney disease (CKD). Prebiotics have emerged as an alternative to modulate the gut environment and to attenuate toxin production. This trial aims to investigate the effect of a prebiotic fructooligosaccharide (FOS) on uremic toxins of non-dialysis-dependent CKD (NDD-CKD) patients. METHODS A double-blind, placebo-controlled, randomized trial was conducted for 3 months. In all, 50 nondiabetic NDD-CKD patients [estimated glomerular filtration rate (eGFR) <45 mL/min/1.73 m2], aged 18-80 years, were allocated to prebiotic (FOS, 12 g/day) or placebo (maltodextrin, 12 g/day) groups. Primary outcomes were changes in serum (total and free) and urinary (total) PCS. Secondary outcomes included changes in IS, IAA, serum markers of intestinal permeability (zonulin), gut-trophic factors (epidermal growth factor and glucagon-like peptide-2), eGFR, inflammation (high sensitive c-reactive protein and interleukin-6), homeostatic model assessment-insulin resistance, lipid profile and gastrointestinal symptoms. RESULTS From 50 participants (54% men, 57.3 ± 14.6 years and eGFR 21.4 ± 7.6 mL/min/1.73 m2), 46 completed the follow-up. No changes in dietary intake or gastrointestinal symptoms were observed. There was a trend in the difference of serum total ΔPCS (treatment effect adjusted for baseline levels: -12.4 mg/L; 95% confidence interval (-5.6 to 0.9 mg/L; P = 0.07) and serum-free Δ%PCS [intervention -8.6 (-41.5 to 13.9%) versus placebo 3.5 (-28.8 to 85.5%); P = 0.07] between the groups. The trend in the difference of serum total ΔPCS was independent of eGFR and dietary protein:fiber ratio intake. No difference was found in urinary PCS. Aside from the decreased high-density lipoprotein cholesterol in the intervention, no differences were observed in the change of IS, IAA or other secondary outcome between the groups. CONCLUSIONS Our result suggests the potential of FOS in reducing serum total and free PCS in nondiabetic NDD-CKD patients.
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Affiliation(s)
- Christiane Ishikawa Ramos
- Nutrition Program, Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil.,Hospital do Rim - Fundação Oswaldo Ramos, São Paulo, Brazil.,Faculty of Health Sciences and Medicine, Bond University, Queensland, Australia
| | - Rachel Gatti Armani
- Hospital do Rim - Fundação Oswaldo Ramos, São Paulo, Brazil.,Division of Nephrology, UNIFESP, São Paulo, Brazil
| | | | - Maria Aparecida Dalboni
- Division of Nephrology, UNIFESP, São Paulo, Brazil.,Post-graduate Program in Medicine, Universidade Nove de Julho (UNINOVE), São Paulo, Brazil
| | | | - Lia Sumie Nakao
- Department of Basic Pathology, Universidade Federal do Paraná (UFPR), Curitiba, Brazil
| | | | - Lilian Cuppari
- Nutrition Program, Universidade Federal de São Paulo (UNIFESP), São Paulo, Brazil.,Hospital do Rim - Fundação Oswaldo Ramos, São Paulo, Brazil.,Division of Nephrology, UNIFESP, São Paulo, Brazil
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Banaszkiewicz M, Małyszko J, Vesole DH, Woziwodzka K, Jurczyszyn A, Żórawski M, Krzanowski M, Małyszko J, Batko K, Kuźniewski M, Krzanowska K. New Biomarkers of Ferric Management in Multiple Myeloma and Kidney Disease-Associated Anemia. J Clin Med 2019; 8:jcm8111828. [PMID: 31683939 PMCID: PMC6912471 DOI: 10.3390/jcm8111828] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 10/28/2019] [Accepted: 10/29/2019] [Indexed: 02/07/2023] Open
Abstract
Multiple myeloma (MM) is a malignancy of clonal plasma cells accounting for approximately 10% of haematological malignancies. MM mainly affects older patients, more often males and is more frequently seen in African Americans. The most frequent manifestations of MM are anaemia, osteolytic bone lesions, kidney failure and hypercalcemia. The anaemia develops secondary to suppression of erythropoiesis by cytokine networks, similarly to the mechanism of anaemia of chronic disease. The concomitant presence of kidney failure, especially chronic kidney disease (CKD) and MM per se, leading to anaemia of chronic disease (ACD) in combination, provoked us to pose the question about their reciprocal dependence and relationship with specific biomarkers; namely, soluble transferrin receptor (sTfR), growth differentiation factor 15 (GDF15), hepcidin 25 and zonulin. One or more of these are new biomarkers of ferric management may be utilized in the near future as prognostic predictors for patients with MM and kidney failure.
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Affiliation(s)
- Małgorzata Banaszkiewicz
- Departament of Nephrology, Jagiellonian University Medical College, Kopernika 15-15c, 31-501 Cracow, Poland.
| | - Jolanta Małyszko
- Department of Nephrology, Dialysis and Internal Medicine, Warsaw Medical University, Banacha 1a, 02-097 Warsaw, Poland.
| | - David H Vesole
- John Theurer Cancer Center, Hackensack University Medical Center, 92 2nd St, Hackensack, NJ 07601, USA.
| | - Karolina Woziwodzka
- Departament of Nephrology, Jagiellonian University Medical College, Kopernika 15-15c, 31-501 Cracow, Poland.
| | - Artur Jurczyszyn
- Departament of Hematology, Jagiellonian University Medical College, Kopernika 17, 30-501 Cracow, Poland.
| | - Marcin Żórawski
- Departament of Clinical Medicine, Medical University, Szpitalna 37, 15-254 Bialystok, Poland.
| | - Marcin Krzanowski
- Departament of Nephrology, Jagiellonian University Medical College, Kopernika 15-15c, 31-501 Cracow, Poland.
| | - Jacek Małyszko
- Departament of Nephrology, Medical University, Żurawia 14, 15-540 Bialystok, Poland.
| | - Krzysztof Batko
- Departament of Nephrology, Jagiellonian University Medical College, Kopernika 15-15c, 31-501 Cracow, Poland.
| | - Marek Kuźniewski
- Departament of Nephrology, Jagiellonian University Medical College, Kopernika 15-15c, 31-501 Cracow, Poland.
| | - Katarzyna Krzanowska
- Departament of Nephrology, Jagiellonian University Medical College, Kopernika 15-15c, 31-501 Cracow, Poland.
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Leech B, McIntyre E, Steel A, Sibbritt D. Risk factors associated with intestinal permeability in an adult population: A systematic review. Int J Clin Pract 2019; 73:e13385. [PMID: 31243854 DOI: 10.1111/ijcp.13385] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 06/04/2019] [Accepted: 06/16/2019] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Increased intestinal permeability (IP) involves the loss of integrity between the cells of the small intestine. IP has been suggested to contribute to the pathogenesis and exacerbation of many chronic diseases. Many potential risk factors for IP are proposed in contemporary literature. The purpose of this review is to identify the most significant risk factors for IP. METHODS A systematic search of literature published up until September 2018 in the PubMed, EMBASE, CINAHL, and Scopus databases was conducted. RESULTS A total of 47 articles met the inclusion criteria. Elevated levels of proinflammatory markers, dyslipidaemia, hyperglycaemia, insulin resistance, anthropometric measurements resembling obesity, advanced disease severity, comorbidity and the consumption of a Western-style diet were identified as the strongest risk factors for altered intestinal integrity. The risk of IP increases when coupled with a multiple disease state or combined with other environmental risk factors. Furthermore, many of the identified risk factors such as anthropometric measurements and biomarkers were external from intestinal health and rather resembled a metabolic-like condition. CONCLUSIONS This review identified a number of potential risk factors for IP, ranging from biomarkers to anthropometric measurements, demographics, dietary intake and chronic diseases. These risk factors warrant the attention of clinicians and other healthcare providers to aid the identification of potential patients at risk of altered IP. Further research needs to examine whether the identified risk factors are homogeneous with the diagnosis of IP or whether the disease state influences the association.
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Affiliation(s)
- Bradley Leech
- Faculty of Health, Australian Research Centre in Complementary and Integrative Medicine, University of Technology Sydney, Ultimo, New South Wales, Australia
| | - Erica McIntyre
- Faculty of Health, Australian Research Centre in Complementary and Integrative Medicine, University of Technology Sydney, Ultimo, New South Wales, Australia
| | - Amie Steel
- Faculty of Health, Australian Research Centre in Complementary and Integrative Medicine, University of Technology Sydney, Ultimo, New South Wales, Australia
| | - David Sibbritt
- Faculty of Health, Australian Research Centre in Complementary and Integrative Medicine, University of Technology Sydney, Ultimo, New South Wales, Australia
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9
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Lukaszyk E, Lukaszyk M, Koc-Zorawska E, Bodzenta-Lukaszyk A, Malyszko J. Zonulin, inflammation and iron status in patients with early stages of chronic kidney disease. Int Urol Nephrol 2017; 50:121-125. [PMID: 29134616 PMCID: PMC5758680 DOI: 10.1007/s11255-017-1741-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Accepted: 11/06/2017] [Indexed: 01/28/2023]
Abstract
Background/aims Zonulin is the only known regulator of intestinal permeability. It is also considered as a potential inflammatory marker in several conditions such as diabetes and inflammatory bowel syndrome. The aim of the study was to investigate zonulin levels in patients with early stages of CKD and its possible correlation with inflammation, anemia and iron status parameters. Methods Eighty-eight patients with early stages of CKD and 23 healthy volunteers were enrolled in the study. Zonulin, hepcidin-25, soluble transferrin receptor, interleukin-6 and high-sensitivity C-reactive protein were measured using commercially available assays. Results Zonulin was significantly lower among patients with CKD in comparison with healthy volunteers. There were no statistically significant differences in zonulin concentration between patients with and without inflammation. Zonulin was significantly correlated with hepcidin only in patients with inflammation. Zonulin was neither related to iron nor related to ferritin. Conclusions Zonulin cannot be considered as an inflammatory marker in CKD. It does not play a role in the disturbances of iron metabolism in CKD. Its physiological role remains to be elucidated.
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Affiliation(s)
- Ewelina Lukaszyk
- 2nd Department of Nephrology and Hypertension with Dialysis Unit, Medical University of Bialystok, Marii Skłodowskiej-Curie 24a, 15-276, Białystok, Poland
| | - Mateusz Lukaszyk
- Department of Allergy and Internal Medicine, Medical University of Bialystok, Białystok, Poland
| | - Ewa Koc-Zorawska
- 2nd Department of Nephrology and Hypertension with Dialysis Unit, Medical University of Bialystok, Marii Skłodowskiej-Curie 24a, 15-276, Białystok, Poland
| | - Anna Bodzenta-Lukaszyk
- Department of Allergy and Internal Medicine, Medical University of Bialystok, Białystok, Poland
| | - Jolanta Malyszko
- 2nd Department of Nephrology and Hypertension with Dialysis Unit, Medical University of Bialystok, Marii Skłodowskiej-Curie 24a, 15-276, Białystok, Poland.
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10
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Higher Levels of Serum Zonulin May Rather Be Associated with Increased Risk of Obesity and Hyperlipidemia, Than with Gastrointestinal Symptoms or Disease Manifestations. Int J Mol Sci 2017; 18:ijms18030582. [PMID: 28282855 PMCID: PMC5372598 DOI: 10.3390/ijms18030582] [Citation(s) in RCA: 73] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 02/24/2017] [Accepted: 03/02/2017] [Indexed: 12/12/2022] Open
Abstract
Zonulin is considered a biomarker of increased intestinal permeability, and elevated levels have been found in celiac disease. The primary aim of this study was to examine the association between serum zonulin levels and gastrointestinal (GI) symptoms, and secondarily, between zonulin levels and anthropometric and metabolic factors. The offspring (n = 363) of the participants of the Malmö Diet and Cancer cardiovascular cohort (MDC-CV) were invited to an anthropometric and clinical examination, where fasting plasma glucose levels were measured. Questionnaires about lifestyle factors and medical history were completed along with the Visual Analog Scale for Irritable Bowel Syndrome (VAS-IBS). Zonulin levels were measured in serum by ELISA. Neither GI symptoms nor GI diseases had any influence on zonulin levels. Higher zonulin levels were associated with higher waist circumference (p = 0.003), diastolic blood pressure (p = 0.003), and glucose levels (p = 0.036). Higher zonulin levels were associated with increased risk of overweight (p < 0.001), obesity (p = 0.047), and hyperlipidemia (p = 0.048). We cannot detect altered zonulin levels among individuals reporting GI symptoms or GI diseases, but higher zonulin levels are associated with higher waist circumference, diastolic blood pressure, fasting glucose, and increased risk of metabolic diseases.
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11
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Ohlsson B, Roth B, Larsson E, Höglund P. Calprotectin in serum and zonulin in serum and feces are elevated after introduction of a diet with lower carbohydrate content and higher fiber, fat and protein contents. Biomed Rep 2017; 6:411-422. [PMID: 28413639 PMCID: PMC5374938 DOI: 10.3892/br.2017.865] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 02/01/2017] [Indexed: 01/12/2023] Open
Abstract
Calprotectin is a marker of inflammation and zonulin is a marker of intestinal permeability. Diets with lower carbohydrate content and higher contents of fat, fiber and protein, e.g., Okinawan-based diet, are considered to reduce inflammation and intestinal permeability. The aim of the present study was to evaluate calprotectin and zonulin levels in serum and feces after intervention with an Okinawan-based Nordic diet. Thirty patients (17 women) with type 2 diabetes, mean age 57.5±8.2 years, BMI 29.9±4.1 kg/m2, were served the diet during 12 weeks, and were followed for another 16 weeks. Anthropometric and metabolic parameters were registered. Fasting levels of calprotectin and zonulin in serum and feces, and hormones in plasma, were measured by Luminex or ELISA before study start and after 12 and 28 weeks. Calprotectin in serum tended to be increased (P=0.074) after 12 weeks. Zonulin in serum and feces were elevated after 12 weeks (P=0.019 vs. P<0.001), and remained elevated in serum after 28 weeks (P=0.014). In contrast to baseline, there was a correlation between calprotectin and zonulin in serum and feces after dietary intervention (P=0.025 vs. P=0.079). Energy percentage of protein in breakfast correlated with serum calprotectin (P=0.008) and tended to correlate with serum zonulin (P=0.059). Calprotectin in serum tended to be elevated, and zonulin in serum and feces are elevated after introduction of an Okinawan-based Nordic diet. These biomarkers correlate with energy percentage of protein.
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Affiliation(s)
- Bodil Ohlsson
- Department of Internal Medicine, Skane University Hospital, Malmo, Sweden
| | - Bodil Roth
- Department of Internal Medicine, Skane University Hospital, Malmo, Sweden
| | - Ewa Larsson
- Department of Cardiothoracic Surgery, Lund University, Skane University Hospital, Lund, Sweden
| | - Peter Höglund
- Department of Clinical Chemistry and Pharmacology, Lund University, Skane University Hospital, Lund, Sweden
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