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Matsuoka T, Abe M, Kobayashi H. Iron Metabolism and Inflammatory Mediators in Patients with Renal Dysfunction. Int J Mol Sci 2024; 25:3745. [PMID: 38612557 PMCID: PMC11012052 DOI: 10.3390/ijms25073745] [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] [Received: 01/31/2024] [Revised: 03/23/2024] [Accepted: 03/25/2024] [Indexed: 04/14/2024] Open
Abstract
Chronic kidney disease (CKD) affects around 850 million people worldwide, posing significant challenges in healthcare due to complications like renal anemia, end-stage kidney disease, and cardiovascular diseases. This review focuses on the intricate interplay between iron metabolism, inflammation, and renal dysfunction in CKD. Renal anemia, prevalent in CKD, arises primarily from diminished erythropoietin (EPO) production and iron dysregulation, which worsens with disease progression. Functional and absolute iron deficiencies due to impaired absorption and chronic inflammation are key factors exacerbating erythropoiesis. A notable aspect of CKD is the accumulation of uremic toxins, such as indoxyl sulfate (IS), which hinder iron metabolism and worsen anemia. These toxins directly affect renal EPO synthesis and contribute to renal hypoxia, thus playing a critical role in the pathophysiology of renal anemia. Inflammatory cytokines, especially TNF-α and IL-6, further exacerbate CKD progression and disrupt iron homeostasis, thereby influencing anemia severity. Treatment approaches have evolved to address both iron and EPO deficiencies, with emerging therapies targeting hepcidin and employing hypoxia-inducible factor (HIF) stabilizers showing potential. This review underscores the importance of integrated treatment strategies in CKD, focusing on the complex relationship between iron metabolism, inflammation, and renal dysfunction to improve patient outcomes.
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Affiliation(s)
| | | | - Hiroki Kobayashi
- Division of Nephrology, Hypertension and Endocrinology, Department of Medicine, Nihon University School of Medicine, Tokyo 173-8610, Japan
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Amalia L, Saputra GN. Serum erythropoietin in acute ischemic stroke: preliminary findings. Sci Rep 2024; 14:2661. [PMID: 38302546 PMCID: PMC10834471 DOI: 10.1038/s41598-024-53180-3] [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: 11/09/2022] [Accepted: 01/29/2024] [Indexed: 02/03/2024] Open
Abstract
Ischemic stroke is the most common stroke, caused by occlusion of cerebral vessels and leading causes of disability. Erythropoietin (EPO) has non-hematopoietic effects as a neuroprotectant after ischemic event. This study aimed to learn the serum level of EPO in acute ischemic stroke. This cross-sectional study of ischemic stroke patients with onset < 24 h and consecutive sampling was used to collect the data from medical records review, physical examinations, head CT, 24-h EPO, 24-h and seventh-day NIHSS. A total of 47 patients consisting of 59.6% women, with a median age of 53 years old (21-70). The median 24 h EPO level was 808.6 pg/mL (134.2-2988.9). The relationship between 24 h-EPO and 24-h NIHSS were not significant (r = 0.101; p = 0.250), nor to 7th day NIHSS (r = - 0.0174; p = 0.121) and to delta NIHSS (r = 0.186; p = 0.106). The relationship of blood collection time (hour) and EPO was significant (r = - 0.260; p = 0.039). There was a statistically significant difference between serum EPO levels in ischemic stroke patients with lacunar stroke compared to non-lacunar stroke (288.5 vs. 855.4 ng/mL; p = 0.021). There was a relationship between the time of collection of blood and the level of EPO and also there was difference EPO level in lacunar stroke subtype compared with non-lacunar. The relationship between EPO and NIHSS lost significance after analysis. There is a need for a future study comparing each stroke risk factor and the same blood collection time.
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Affiliation(s)
- Lisda Amalia
- Department of Neurology, Faculty of Medicine, Hasan Sadikin Hospital, Universitas Padjadjaran, Jl. Eykman 38, Bandung, 40161, Indonesia.
| | - Gilang Nispu Saputra
- Department of Neurology, Faculty of Medicine, Hasan Sadikin Hospital, Universitas Padjadjaran, Jl. Eykman 38, Bandung, 40161, Indonesia
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3
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Krishnapriya MK, Karthika S, Babu A, Tom AA. Individualization of the Dosage Regimen of Erythropoietin is Crucial in End-stage Renal Disease Patients. SAUDI JOURNAL OF KIDNEY DISEASES AND TRANSPLANTATION 2023; 34:474-481. [PMID: 38995309 DOI: 10.4103/1319-2442.397212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/13/2024] Open
Abstract
The objective of this study was to understand the utilization pattern of erythropoietin in end-stage renal disease patients, along with the effect of body weight and sex on the patients' responses. In this retrospective single-center study, 120 patients were included who were on a once weekly (n = 79), twice weekly (n = 37), or thrice weekly (n = 4) regimen. The doses of erythropoiesis-stimulating agents (ESA) were collected, and the erythropoietin resistance index (ERI) was determined. The Kruskal-Wallis test was used to evaluate the dose schedules, and the once-weekly regimen produced a greater response (P = 0.001). The asymptotic significance of Pearson's Chi-square-test equating the mean ERI and body mass index (BMI) was 0.034. No statistically significant correlation was estimated between sex and mean ERI (P = 0.201). Our study demonstrated that the once-weekly regimen dominated over the others in terms of efficacy, and individuals with a higher BMI were found to respond better to the ESA therapy.
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Affiliation(s)
- M K Krishnapriya
- Department of Pharmacy Practice, Nirmala College of Pharmacy, Kerala University of Health Sciences, Kerala, India
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Lee HY, Suh SW, Hwang JH, Shin J. Responsiveness to an erythropoiesis-stimulating agent is correlated with body composition in patients undergoing chronic hemodialysis. Front Nutr 2022; 9:1044895. [PMID: 36532527 PMCID: PMC9755720 DOI: 10.3389/fnut.2022.1044895] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 11/18/2022] [Indexed: 11/14/2023] Open
Abstract
BACKGROUND Resistance to erythropoiesis-stimulating agents (ESA) is associated with adverse outcomes in patients undergoing chronic hemodialysis. However, the impact of body composition on ESA response remains uncertain. This study retrospectively investigated whether there is an association between the ESA resistance index (ERI) and body composition in patients undergoing chronic hemodialysis. METHODS Multifrequency bioelectrical impedance analysis was used to measure body composition every six months. The ERI was calculated by dividing the weekly body weight-adjusted erythropoietin dose by the hemoglobin concentration. The ERI values were recorded every three months. RESULTS A total of 123 patients were followed up for 24 (interquartile range 5, 75) months. The ERI was negatively correlated with body mass index, arm circumference, arm muscle circumference, body fat percentage, and visceral fat area (P = 0.057, 0.001, 0.017, 0.063, and 0.041, respectively). Patients with a higher mean ERI during the study period had an increased risk of all-cause mortality, cardiovascular events, and infection requiring hospitalization than those with a lower mean ERI (P = 0.027, 0.021, and 0.037, respectively). We also evaluated the association between the slope of body composition parameters and the ERI trend over time and found that the ERI increased over time in patients who had an increased ratio of extracellular water to total body water (P = 0.002) as well as decreased arm circumference, arm muscle circumference, visceral fat area, and phase angle (P = 0.001, P < 0.001, P = 0.036, and 0.002). CONCLUSION ESA responsiveness appears to be associated with body composition in patients undergoing chronic hemodialysis. Therefore, measures improving body composition, such as nutrition and exercise, may have a favorable effect on the response to ESA.
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Affiliation(s)
- Hyang Yun Lee
- Division of Nephrology, Department of Internal Medicine, Chung-Ang University Hospital, Seoul, South Korea
| | - Suk-Won Suh
- Department of Surgery, Chung-Ang University Hospital, Seoul, South Korea
| | - Jin Ho Hwang
- Division of Nephrology, Department of Internal Medicine, Chung-Ang University Hospital, Seoul, South Korea
| | - Jungho Shin
- Division of Nephrology, Department of Internal Medicine, Chung-Ang University Hospital, Seoul, South Korea
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Chiang WF, Hsiao PJ, Wu KL, Chen HM, Chu CM, Chan JS. Investigation of the Relationship between Lean Muscle Mass and Erythropoietin Resistance in Maintenance Haemodialysis Patients: A Cross-Sectional Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19095704. [PMID: 35565102 PMCID: PMC9100199 DOI: 10.3390/ijerph19095704] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 04/25/2022] [Accepted: 04/26/2022] [Indexed: 12/04/2022]
Abstract
Each patient undergoing maintenance haemodialysis (MHD) has a different response to erythropoiesis-stimulating agents (ESAs). Haemodilution due to fluid overload has been shown to contribute to anaemia. Body mass index (BMI) has been shown to influence ESA response in dialysis patients; however, BMI calculation does not distinguish between fat and lean tissue. The association between lean muscle mass and erythropoietin hyporesponsiveness is still not well-known among MHD patients. We designed a cross-sectional study and used bioimpedance spectroscopy (BIS) to analyse the relationship between body composition, haemoglobin level, and erythropoietin resistance index (ERI) in MHD patients. Seventy-seven patients were enrolled in the study group. Compared with patients with haemoglobin ≥ 10 g/dL, those with haemoglobin < 10 g/dL had higher serum ferritin levels, malnutrition−inflammation scores (MIS), relative overhydration, ESA doses, and ERIs. In multivariate logistic regression, higher ferritin levels and MIS were the only predictors of lower haemoglobin levels. The ERI was significantly positively correlated with age, Kt/V, ferritin levels, and MIS and negatively correlated with albumin levels, BMI, and lean tissue index (LTI). Multivariate linear regression analysis revealed that ferritin levels, BMI, and LTI were the most important predictors of ERI. In MHD patients, using BIS to measure body composition can facilitate the development of early interventions that aim to prevent sarcopenia, support ESA responsiveness, and, consequently, improve anaemia management.
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Affiliation(s)
- Wen-Fang Chiang
- Division of Nephrology, Department of Medicine, Armed Forces Taoyuan General Hospital, Taoyuan 325, Taiwan; (W.-F.C.); (K.-L.W.)
- Division of Nephrology, Department of Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei 114, Taiwan
- School of Medicine, National Defense Medical Center, Taipei 114, Taiwan
| | - Po-Jen Hsiao
- Division of Nephrology, Department of Medicine, Armed Forces Taoyuan General Hospital, Taoyuan 325, Taiwan; (W.-F.C.); (K.-L.W.)
- Division of Nephrology, Department of Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei 114, Taiwan
- School of Medicine, National Defense Medical Center, Taipei 114, Taiwan
- Department of Life Sciences, National Central University, Taoyuan 320, Taiwan
- Division of Nephrology, Department of Medicine, Fu-Jen Catholic University Hospital, School of Medicine, Fu-Jen Catholic University, New Taipei City 242, Taiwan
- Correspondence: or (P.-J.H.); (J.-S.C.); Tel.: +886-3-4799595 (ext. 325823) (P.-J.H. & J.-S.C.)
| | - Kun-Lin Wu
- Division of Nephrology, Department of Medicine, Armed Forces Taoyuan General Hospital, Taoyuan 325, Taiwan; (W.-F.C.); (K.-L.W.)
- Division of Nephrology, Department of Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei 114, Taiwan
- School of Medicine, National Defense Medical Center, Taipei 114, Taiwan
| | - Hung-Ming Chen
- Division of Haematology and Oncology, Department of Medicine, Armed Forces Taoyuan General Hospital, Taoyuan 325, Taiwan;
| | - Chi-Ming Chu
- Graduate Institute of Life Sciences, National Defense Medical Center, Taipei 114, Taiwan;
- School of Public Health, National Defense Medical Center, Taipei 114, Taiwan
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei 114, Taiwan
- Department of Public Health, School of Public Health, China Medical University, Taichung 404, Taiwan
- Department of Public Health, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Big Data Research Center, Fu-Jen Catholic University, New Taipei City 242, Taiwan
- Division of Biostatistics and Medical Informatics, Department of Epidemiology, School of Public Health, National Defense Medical Center, Taipei 114, Taiwan
| | - Jenq-Shyong Chan
- Division of Nephrology, Department of Medicine, Armed Forces Taoyuan General Hospital, Taoyuan 325, Taiwan; (W.-F.C.); (K.-L.W.)
- Division of Nephrology, Department of Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei 114, Taiwan
- School of Medicine, National Defense Medical Center, Taipei 114, Taiwan
- Correspondence: or (P.-J.H.); (J.-S.C.); Tel.: +886-3-4799595 (ext. 325823) (P.-J.H. & J.-S.C.)
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Bronze-da-Rocha E, Santos-Silva A. Neutrophil Elastase Inhibitors and Chronic Kidney Disease. Int J Biol Sci 2018; 14:1343-1360. [PMID: 30123081 PMCID: PMC6097478 DOI: 10.7150/ijbs.26111] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 05/18/2018] [Indexed: 12/11/2022] Open
Abstract
End-stage renal disease (ESRD), the last stage of chronic kidney disease (CKD), is characterized by chronic inflammation and oxidative stress. Neutrophils are the front line cells that mediate an inflammatory response against microorganisms as they can migrate, produce reactive oxygen species (ROS), secrete neutrophil serine proteases (NSPs), and release neutrophil extracellular traps (NETs). Serine proteases inhibitors regulate the activity of serine proteases and reduce neutrophil accumulation at inflammatory sites. This review intends to relate the role of neutrophil elastase in CKD and the effects of neutrophil elastase inhibitors in predicting or preventing inflammation.
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Affiliation(s)
- Elsa Bronze-da-Rocha
- UCIBIO/REQUIMTE, Laboratório de Bioquímica, Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto, 4050-313 Porto, Portugal
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7
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El-Kannishy GM, Megahed AF, Tawfik MM, El-Said G, Zakaria RT, Mohamed NA, Taha EM, Ammar AA, Abd Eltawab AM, Sayed-Ahmed NA. Obesity may be erythropoietin dose-saving in hemodialysis patients. Kidney Res Clin Pract 2018; 37:148-156. [PMID: 29971210 PMCID: PMC6027808 DOI: 10.23876/j.krcp.2018.37.2.148] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 03/19/2018] [Accepted: 03/20/2018] [Indexed: 12/31/2022] Open
Abstract
Background In dialysis patients, the obesity-survival paradox still requires an explanation. Anemia and high doses of erythropoiesis-stimulating agents (ESAs) are associated with worse outcomes in the hemodialysis (HD) population. In the present study, we explored the relation between obesity and anemia control in a sample of maintenance HD patients in Egypt. Methods This multicenter observational study included 733 patients on maintenance HD from 9 hemodialysis centers in Egypt. Clinical and laboratory data as well as average doses of ESAs and parenteral iron were recorded. The erythropoietin resistance index (ERI) was calculated. Results Obesity, defined as a body mass index (BMI) ≥ 30 kg/m2, was present in 22.6% of the studied population. The target hemoglobin level (10.0–11.5 g/dL) was achieved in 27.3% of non-obese and 25.3% of obese patients, with no significant difference. The median serum ferritin and the values of transferrin saturation index did not differ significantly between these two groups. The weekly ESA dose was significantly lower in obese than in non-obese patients (P = 0.0001). A trend toward higher ESA doses and ERI values was observed in patients with lower BMIs (P < 0.0001). Multiple linear regression revealed that the BMI and urea reduction ratio were the strongest predictors of the ERI. Conclusion Our study adds more evidence to obesity-associated advantages in HD patients. BMI may determine ESA response, with better responses observed in patients with higher BMIs.
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Affiliation(s)
- Ghada M El-Kannishy
- Mansoura Nephrology and Dialysis Unit (MNDU), Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Abir F Megahed
- Nephrology Unit, Mansoura Military Hospital, Mansoura, Egypt
| | - Mona M Tawfik
- Mansoura Nephrology and Dialysis Unit (MNDU), Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Ghada El-Said
- Mansoura Nephrology and Dialysis Unit (MNDU), Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | | | | | - Eman M Taha
- Temy Alamdeed Dialysis Center, Dakahlyia, Egypt
| | | | | | - Nagy A Sayed-Ahmed
- Mansoura Nephrology and Dialysis Unit (MNDU), Faculty of Medicine, Mansoura University, Mansoura, Egypt
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8
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Santos EJF, Hortegal EV, Serra HO, Lages JS, Salgado-Filho N, Dos Santos AM. Epoetin alfa resistance in hemodialysis patients with chronic kidney disease: a longitudinal study. ACTA ACUST UNITED AC 2018; 51:e7288. [PMID: 29742267 PMCID: PMC5972010 DOI: 10.1590/1414-431x20187288] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Accepted: 03/07/2018] [Indexed: 12/17/2022]
Abstract
Anemia is an inevitable complication of hemodialysis, and the primary cause is
erythropoietin deficiency. After diagnosis, treatment begins with an
erythropoiesis-stimulating agent (ESA). However, some patients remain anemic
even after receiving this medication. This study aimed to investigate the
factors associated with resistance to recombinant human erythropoietin therapy
with epoetin alfa (αEPO). We performed a prospective, longitudinal study of
hemodialysis patients receiving treatment with αEPO at our reference hospital
from July 2015 to June 2016. Clinical data was collected, and the response to
αEPO treatment was evaluated using the erythropoietin resistance index (ERI).
The ERI was defined as the weekly weight-adjusted αEPO dose (U/kg per
week)/hemoglobin level (g/dL). A longitudinal linear regression model was fitted
with random effects to verify the relationships between clinical and laboratory
data and ERI. We enrolled 99 patients (average age, 45.7 (±17.6) years; male,
51.5%; 86.8% with hypertension). The ERI showed a significant positive
association with serum ferritin and C-reactive protein, percentage interdialytic
weight gain, and continuous usage of angiotensin receptor blocker (ARB)
hypertension medication. The ERI was negatively associated with serum iron and
albumin, age, urea reduction ratio, and body mass index. Our findings indicate
that resistance to αEPO was related to a low serum iron reserve, an inflammatory
state, poor nutritional status, and continuous usage of ARBs.
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Affiliation(s)
- E J F Santos
- Hospital Universitário, Universidade Federal do Maranhão, São Luís, MA, Brasil
| | - E V Hortegal
- Departamento de Saúde Pública, Universidade Federal do Maranhão, São Luís, MA, Brasil
| | - H O Serra
- Hospital Universitário, Universidade Federal do Maranhão, São Luís, MA, Brasil
| | - J S Lages
- Hospital Universitário, Universidade Federal do Maranhão, São Luís, MA, Brasil
| | - N Salgado-Filho
- Hospital Universitário, Universidade Federal do Maranhão, São Luís, MA, Brasil
| | - A M Dos Santos
- Departamento de Saúde Pública, Universidade Federal do Maranhão, São Luís, MA, Brasil
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Petrulienė K, Žiginskienė E, Kuzminskis V, Nedzelskienė I, Bumblytė IA. Hepcidin serum levels and resistance to recombinant human erythropoietin therapy in hemodialysis patients. MEDICINA-LITHUANIA 2017; 53:90-100. [PMID: 28416170 DOI: 10.1016/j.medici.2017.03.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 11/25/2016] [Accepted: 03/20/2017] [Indexed: 02/09/2023]
Abstract
OBJECTIVE The aim of this study was to analyze the factors that are associated with the response to erythropoiesis-stimulating agents (ESAs) and its association with hospitalization and mortality rates; to evaluate the serum hepcidin level and its associations with iron profile, inflammatory markers, ESA responsiveness, and mortality; and to determine independent factors affecting ERI and hepcidin. MATERIALS AND METHODS To evaluate a dose-response effect of ESAs we used the erythropoietin resistance index (ERI). Patients were stratified in two groups: nonresponders and responders (ERI>15, n=20, and ERI ≤15U/kg/week/g per 100mL, n=153, respectively). Hematological data, hepcidin levels, iron parameters, inflammatory markers, hospitalization and mortality rates were compared between the groups. Multiple regression analysis was used to determine independent factors affecting ERI and hepcidin. RESULTS C-reactive protein (CRP) (β=0.078, P=0.007), albumin (β=-0.436, P=0.004), body mass index (β=-0.374, P<0.001), and hospitalization rate per year (β=3.017, P<0.001) were found to be significant determinants of ERI in maintenance hemodialysis (MHD) patients. Inadequate dialysis was associated with higher ERI. Patients with concomitant oncological diseases had higher ERI (31.2±12.4 vs 9.7±8.1U/kg/week/g per 100mL, P=0.002). The hepcidin level was 158.51±162.57 and 120.65±67.28ng/mL in nonresponders and responders, respectively (P=0.33). Hepcidin correlated directly with ERI, dose of ESAs, ferritin and inversely with Hb, transferrin saturation, and albumin. ERI (β=4.869, P=0.002) and ferritin (β=0.242, P=0.003) were found to be significant determinants of hepcidin in MHD patients. The hospitalization rate per year was 2.35±1.8 and 1.04±1.04 in nonresponders and responders, respectively (P=0.011). The mean length of one hospitalization was 25.12±21.26 and 10.82±17.25 days, respectively (P=0.012). Death occurred in 30% of the patients from the responders' group and in 50% from the nonresponders' group (P=0.289). The mean hepcidin concentration of patients who died was 141.9±129.62ng/mL and who survived, 132.98±109.27ng/mL (P=0.797). CONCLUSIONS CRP, albumin, BMI, and hospitalization rate per year were found to be significant determinants of ERI in MHD patients. Inadequate dialysis was associated with higher epoetin requirements. There were no difference in patient mortality by ERI, but a significant difference in hospitalization rates and mean length of one hospitalization was revealed. A significant positive relation between hepcidin and ERI was revealed. ERI and ferritin were found to be significant determinants of hepcidin in MHD patients. Hepcidin was not related to mortality.
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Affiliation(s)
- Kristina Petrulienė
- Department of Nephrology, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania.
| | - Edita Žiginskienė
- Department of Nephrology, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Vytautas Kuzminskis
- Department of Nephrology, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Irena Nedzelskienė
- Department of Odontology, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Inga Arūnė Bumblytė
- Department of Nephrology, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania
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Fernandes R, Freitas B, Miranda V, Costa E, Santos-Silva A, Bronze-da-Rocha E. Polymorphisms of the ELANE Gene Promoter Region in End-Stage Chronic Kidney Disease Patients. Genes (Basel) 2016; 7:genes7050017. [PMID: 27136588 PMCID: PMC4880837 DOI: 10.3390/genes7050017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 04/08/2016] [Accepted: 04/25/2016] [Indexed: 12/19/2022] Open
Abstract
End-stage renal disease (ESRD) patients have a high mortality rate that exceeds that of non-ESRD population. The hemodialysis procedure induces neutrophil activation and elastase release, which might have a role in the inflammatory process and in the development of oxidative stress. The ELANE gene encodes the neutrophil elastase. We analyzed the effect of ELANE promoter region polymorphisms and its relation with the circulating levels of elastase, as well as several clinical, biochemical and inflammatory markers in 123 ESRD patients. We found two duplications in heterozygosity in the promoter region and a new polymorphism, the c.-801G>A. ESRD patients heterozygous for the c.-903T>G polymorphism had no changes in the circulating levels of elastase or other evaluated variables, and those homozygous for the c.-741G>A polymorphism showed significant effects on neutrophils count, as well as in neutrophils/lymphocytes ratio, which might be associated with an increased inflammatory process.
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Affiliation(s)
- Rafael Fernandes
- UCIBIO/REQUIMTE, Laboratório de Bioquímica, Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto,4050-313 Porto, Portugal.
| | - Bruno Freitas
- UCIBIO/REQUIMTE, Laboratório de Bioquímica, Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto,4050-313 Porto, Portugal.
| | - Vasco Miranda
- Frenesius Medical Care, Nephrocare Maia, SA, Rua Altos 70, Maia, 4470-235 Porto, Portugal.
| | - Elísio Costa
- UCIBIO/REQUIMTE, Laboratório de Bioquímica, Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto,4050-313 Porto, Portugal.
| | - Alice Santos-Silva
- UCIBIO/REQUIMTE, Laboratório de Bioquímica, Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto,4050-313 Porto, Portugal.
| | - Elsa Bronze-da-Rocha
- UCIBIO/REQUIMTE, Laboratório de Bioquímica, Departamento de Ciências Biológicas, Faculdade de Farmácia, Universidade do Porto,4050-313 Porto, Portugal.
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11
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Garrido P, Ribeiro S, Fernandes J, Vala H, Rocha-Pereira P, Bronze-da-Rocha E, Belo L, Costa E, Santos-Silva A, Reis F. Resistance to Recombinant Human Erythropoietin Therapy in a Rat Model of Chronic Kidney Disease Associated Anemia. Int J Mol Sci 2015; 17:ijms17010028. [PMID: 26712750 PMCID: PMC4730274 DOI: 10.3390/ijms17010028] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 11/23/2015] [Accepted: 12/18/2015] [Indexed: 12/21/2022] Open
Abstract
This study aimed to elucidate the mechanisms explaining the persistence of anemia and resistance to recombinant human erythropoietin (rHuEPO) therapy in a rat model of chronic kidney disease (CKD)-associated anemia with formation of anti-rHuEPO antibodies. The remnant kidney rat model of CKD induced by 5/6 nephrectomy was used to test a long-term (nine weeks) high dose of rHuEPO (200 UI/kg bw/week) treatment. Hematological and biochemical parameters were evaluated as well as serum and tissue (kidney, liver and/or duodenum) protein and/or gene expression of mediators of erythropoiesis, iron metabolism and tissue hypoxia, inflammation, and fibrosis. Long-term treatment with a high rHuEPO dose is associated with development of resistance to therapy as a result of antibodies formation. In this condition, serum EPO levels are not deficient and iron availability is recovered by increased duodenal absorption. However, erythropoiesis is not stimulated, and the resistance to endogenous EPO effect and to rHuEPO therapy results from the development of a hypoxic, inflammatory and fibrotic milieu in the kidney tissue. This study provides new insights that could be important to ameliorate the current therapeutic strategies used to treat patients with CKD-associated anemia, in particular those that become resistant to rHuEPO therapy.
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Affiliation(s)
- Patrícia Garrido
- Laboratory of Pharmacology & Experimental Therapeutics, Institute for Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal.
| | - Sandra Ribeiro
- UCIBIO@REQUIMTE, Faculty of Pharmacy, Department of Biological Sciences, Laboratory of Biochemistry, University of Porto, 4050-313 Porto, Portugal.
| | - João Fernandes
- Laboratory of Pharmacology & Experimental Therapeutics, Institute for Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal.
- UCIBIO@REQUIMTE, Faculty of Pharmacy, Department of Biological Sciences, Laboratory of Biochemistry, University of Porto, 4050-313 Porto, Portugal.
| | - Helena Vala
- Center for Studies in Education, and Health Technologies, CI&DETS, CITAB, Agrarian School of Viseu, Polytechnic Institute of Viseu, 3504-510 Viseu, Portugal.
| | - Petronila Rocha-Pereira
- Research Centre in Health Sciences, University of Beira Interior, 6201-001 Covilhã, Portugal.
| | - Elsa Bronze-da-Rocha
- UCIBIO@REQUIMTE, Faculty of Pharmacy, Department of Biological Sciences, Laboratory of Biochemistry, University of Porto, 4050-313 Porto, Portugal.
| | - Luís Belo
- UCIBIO@REQUIMTE, Faculty of Pharmacy, Department of Biological Sciences, Laboratory of Biochemistry, University of Porto, 4050-313 Porto, Portugal.
| | - Elísio Costa
- UCIBIO@REQUIMTE, Faculty of Pharmacy, Department of Biological Sciences, Laboratory of Biochemistry, University of Porto, 4050-313 Porto, Portugal.
| | - Alice Santos-Silva
- UCIBIO@REQUIMTE, Faculty of Pharmacy, Department of Biological Sciences, Laboratory of Biochemistry, University of Porto, 4050-313 Porto, Portugal.
| | - Flávio Reis
- Laboratory of Pharmacology & Experimental Therapeutics, Institute for Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal.
- Center for Neuroscience and Cell Biology-Institute for Biomedical Imaging and Life Sciences (CNC.IBILI) Research Consortium, University of Coimbra, 3000-548 Coimbra, Portugal.
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