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Paglialonga F, Monzani A, Prodam F, Smith C, De Zan F, Canpolat N, Agbas A, Bayazit A, Anarat A, Bakkaloglu SA, Askiti V, Stefanidis CJ, Azukaitis K, Bulut IK, Borzych-Dużałka D, Duzova A, Habbig S, Krid S, Licht C, Litwin M, Obrycki L, Ranchin B, Samaille C, Shenoy M, Sinha MD, Spasojevic B, Vidal E, Yilmaz A, Fischbach M, Schaefer F, Schmitt CP, Edefonti A, Shroff R. Nutritional and Anthropometric Indices in Children Receiving Haemodiafiltration vs Conventional Haemodialysis - The HDF, Heart and Height (3H) Study. J Ren Nutr 2023; 33:17-28. [PMID: 35870690 DOI: 10.1053/j.jrn.2022.07.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 05/26/2022] [Accepted: 07/03/2022] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND The "HDF-Heart-Height" study showed that haemodiafiltration (HDF) is associated with improved growth compared to conventional haemodialysis (HD). We report a post-hoc analysis of this study assessing the effect of extracorporeal dialysis therapies on nutritional indices. METHODS 107 children were included in the baseline cross-sectional analysis, of whom 79 (43 HD, 36 HDF) completed the 12-month follow-up. Height (Ht), optimal 'dry' weight (Wt), and body mass index (BMI) standard deviations scores (SDS), waist-to-hip ratio, des-acyl ghrelin (DAG), adiponectin, leptin, insulin-like growth factor-1 (IGF-1)-SDS and insulin were measured. RESULTS The levels of nutritional indices were comparable between HDF and HD patients at baseline and 12-month. On univariable analyses Wt-SDS positively correlated with leptin and IGF-1-SDS, and negatively with DAG, while Ht-SDS of the overall cohort positively correlated with IGF1-SDS and inversely with DAG and adiponectin. On multivariable analyses, higher 12-month Ht-SDS was inversely associated with baseline DAG (beta = -0.13 per 500 higher; 95%CI -0.22, -0.04; P = .004). Higher Wt-SDS at 12-month was positively associated with HDF modality (beta = 0.47 vs HD; 95%CI 0.12-0.83; P = .01) and inversely with baseline DAG (beta = -0.18 per 500 higher; 95%CI -0.32, -0.05; P = .006). Growth Hormone (GH) treated patients receiving HDF had higher annualized increase in Ht SDS compared to those on HD. CONCLUSIONS In children on HD and HDF both Wt- and Ht-SDS independently correlated with lower baseline levels of the anorexygenic hormone DAG. HDF may attenuate the resistance to GH, but further studies are required to examine the mechanisms linking HDF to improved growth.
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Affiliation(s)
- Fabio Paglialonga
- Pediatric Nephrology, Dialysis and Transplant Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy.
| | - Alice Monzani
- Division of Pediatrics, Department of Health Sciences, University of Piemonte Orientale, Novara, Italy
| | - Flavia Prodam
- Division of Pediatrics, Department of Health Sciences, University of Piemonte Orientale, Novara, Italy; Endocrinology, Department of Translational Medicine, University of Piemonte Orientale, Novara, Italy
| | - Colette Smith
- Institute of Global Health, University College London, London, UK
| | - Francesca De Zan
- University College London Great Ormond Street Hospital for Children and Institute of Child Health, London, UK
| | | | - Ayse Agbas
- Cerrahpasa School of Medicine, Istanbul, Turkey
| | | | | | | | | | | | - Karolis Azukaitis
- Clinic of Pediatrics, Faculty of Medicine, Vilnius University, Vilnius, Lithuania
| | | | | | | | | | | | | | | | | | - Bruno Ranchin
- Hôpital Femme Mère Enfant, Hospices Civils de Lyon, Université de Lyon, Bron, France
| | | | - Mohan Shenoy
- Royal Manchester Children's Hospital, Manchester, UK
| | - Manish D Sinha
- Kings College London Evelina London Children's Hospital, London, UK
| | | | - Enrico Vidal
- Division of Pediatrics, Department of Medicine, University of Udine, Italy
| | - Alev Yilmaz
- Istanbul University, Istanbul Faculty of Medicine, Istanbul, Turkey
| | | | - Franz Schaefer
- Center for Pediatrics and Adolescent Medicine, Heidelberg, Germany
| | | | - Alberto Edefonti
- Pediatric Nephrology, Dialysis and Transplant Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Rukshana Shroff
- University College London Great Ormond Street Hospital for Children and Institute of Child Health, London, UK
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Karaca Z, Yüksel RC, Gunes Sahin G, Sungur N, Temel S, Baskol G, Arikan BT, Sungur M, Gundogan K. Measurement of serial serum total and acylated ghrelin levels in critically ill patients: A prospective and observational pilot study. Nutr Clin Pract 2021; 37:192-198. [PMID: 34101246 DOI: 10.1002/ncp.10681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Ghrelin is a hormone that regulates appetite and energy metabolism. The change of serial serum total and acylated ghrelin levels during hospital stays of critical patients are unknown. In addition, the relationship of this change with the clinical results of patients in the intensive care unit (ICU) is also unknown. The aim of this study was to determine serum total and acylated ghrelin levels serially in critically ill patients. METHODS This prospective study was performed in the ICU. Patients who were >18 years old and stayed in ICU for >48 h were included in the study. Serum total and acylated ghrelin concentrations were measured at baseline in all participants and serially on the 2nd, 5th, and 10th day after entry into the study in those who remained in the ICU. RESULTS A total of 60 participants were included. The mean age was 56 ± 21 years. (Baseline, 2nd, 5th, and 10th day median serum total ghrelin levels were 3551 (1651-3995), 3485.20 (1379-4071), 3359 (1167-3919), and 3355 pg/ml (2207-3843), respectively. Baseline, 2nd, 5th, and 10th day acylated ghrelin levels were 47 (0-673), 50 (0-730), 73 (0-808), and 125 pg/ml (0-689), respectively. There was no significant difference between total ghrelin/acylated ghrelin levels and mortality (P > .05). ICU mortality was 30%. CONCLUSION Ghrelin levels were decreased slightly and acylated ghrelin levels increased substantially over time in critically ill patients. There were no differences between serum total ghrelin/acylated ghrelin levels and ICU mortality .
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Affiliation(s)
- Zahide Karaca
- Division of Intensive Care, Department of Medicine, Erciyes University School of Medicine, Kayseri, Turkey
| | - Recep Civan Yüksel
- Division of Intensive Care, Department of Medicine, Erciyes University School of Medicine, Kayseri, Turkey
| | - Gulsah Gunes Sahin
- Division of Clinical Nutrition, Erciyes University Health Sciences Institute, Kayseri, Turkey
| | - Neslihan Sungur
- Department of Biochemistry, Erciyes University School of Medicine, Kayseri, Turkey
| | - Sahin Temel
- Division of Intensive Care, Department of Medicine, Erciyes University School of Medicine, Kayseri, Turkey
| | - Gulden Baskol
- Department of Biochemistry, Erciyes University School of Medicine, Kayseri, Turkey
| | - Bahadir T Arikan
- Department of Surgery, Erciyes University School of Medicine, Kayseri, Turkey
| | - Murat Sungur
- Division of Intensive Care, Department of Medicine, Erciyes University School of Medicine, Kayseri, Turkey.,Division of Clinical Nutrition, Erciyes University Health Sciences Institute, Kayseri, Turkey
| | - Kursat Gundogan
- Division of Intensive Care, Department of Medicine, Erciyes University School of Medicine, Kayseri, Turkey.,Division of Clinical Nutrition, Erciyes University Health Sciences Institute, Kayseri, Turkey
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Mak RH, Cheung W, Purnell J. Ghrelin in Chronic Kidney Disease: Too Much or Too Little? Perit Dial Int 2020. [DOI: 10.1177/089686080702700112] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Affiliation(s)
- Robert H. Mak
- Department of Pediatrics Oregon Health & Science University Portland, Oregon, USA
| | - Wai Cheung
- Department of Pediatrics Oregon Health & Science University Portland, Oregon, USA
| | - Jonathan Purnell
- Department of Medicine Oregon Health & Science University Portland, Oregon, USA
- Center for the Study of Weight Regulation Oregon Health & Science University Portland, Oregon, USA
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Abstract
Patients with chronic kidney disease are at substantial risk for malnutrition, characterized by protein energy wasting and micronutrient deficiency. Studies show a high prevalence rate of malnutrition in both children and adults with chronic kidney disease. Apart from abnormalities in growth hormone-insulin like growth factor axis, malnutrition also plays a role in the development of stunted growth, commonly observed in children with chronic kidney disease. The pathogenic mechanisms of malnutrition in chronic kidney disease are complex and involve an interplay of multiple pathophysiologic alterations including decreased appetite and nutrient intake, hormonal derangements, metabolic imbalances, inflammation, increased catabolism, and dialysis related abnormalities. Malnutrition increases the risk of morbidity, mortality and overall disease burden in these patients. The simple provision of adequate calorie and protein intake does not effectively treat malnutrition in patients with chronic kidney disease owing to the intricate and multifaceted derangements affecting nutritional status in these patients. A clear understanding of the pathophysiologic mechanisms involved in the development of malnutrition in chronic kidney disease is necessary for developing strategies and interventions that are effective, and capable of restoring normal development and mitigating negative clinical outcomes. In this article, a review of the pathophysiologic mechanisms of malnutrition in chronic kidney disease is presented.
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Affiliation(s)
- Franca M Iorember
- Division of Nephrology, Phoenix Children's Hospital, Phoenix, AZ, United States
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Oncel M, Akbulut S, Toka Ozer T, Kiyici A, Keles M, Baltaci B, Turk S. Cytokines, adipocytokines and inflammatory markers in patients on continuous ambulatory peritoneal dialysis and hemodialysis. Ren Fail 2016; 38:1071-5. [PMID: 27267129 DOI: 10.1080/0886022x.2016.1193874] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Cytokines are essential mediators of immune response. Chronic renal failure patients suffer from chronic inflammation that results from factors such as impaired renal function, accumulation of uremic toxins and bio incompatibility of dialyzer membranes. These patients are also at increased risk of cardiovascular diseases. We have evaluated cytokines, adipocytokines and inflammatory markers in patients with chronic renal failure undergoing hemodialysis (HD) and continuous ambulatory peritoneal dialysis (CAPD). MATERIAL AND METHODS We have determined serum tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), high-sensitivity C-reactive protein (hsCRP), leptin and ghrelin levels of chronic renal failure patients treated with either HD (n = 20) or CAPD (n = 20). TNF-α, IL-6, ghrelin and leptin measurements were performed by commercially available kits based on enzyme-linked immunosorbent assay (ELISA) method. hsCRP levels were determined by turbidimetric methods. RESULTS Serum TNF-α and IL-6 levels of patients on HD were significantly higher than those of the ones on CAPD (p < 0.05). Ghrelin, leptin and hsCRP concentrations were similar in both groups. CONCLUSIONS We can conclude that cytokine production is more obvious in HD process.
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Affiliation(s)
- Mufide Oncel
- a Department of Biochemistry , Mevlana University Medical Faculty , Konya , Turkey
| | - Seval Akbulut
- b Department of Biochemistry , Nevsehir State Hospital , Nevsehir , Turkey
| | - Turkan Toka Ozer
- c Department of Microbiology , Mevlana University Medical Faculty , Konya , Turkey
| | - Aysel Kiyici
- a Department of Biochemistry , Mevlana University Medical Faculty , Konya , Turkey
| | - Mustafa Keles
- d Department of Internal Medicine , Mevlana University Medical Faculty , Konya , Turkey
| | - Beyhan Baltaci
- d Department of Internal Medicine , Mevlana University Medical Faculty , Konya , Turkey
| | - Suleyman Turk
- e Department of Internal Medicine , Selcuk University Medical Faculty , Konya , Turkey
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Shouman MG, Ismail NA, Badr A, Abdelrahman SM, Ragab S, Farouk H. Fetuin-A and Ghrelin Levels in Children with End Stage Renal Disease and the Effect of a Single Hemodialysis Session on Them. Open Access Maced J Med Sci 2015; 3:391-6. [PMID: 27275256 PMCID: PMC4877825 DOI: 10.3889/oamjms.2015.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 06/25/2015] [Accepted: 06/26/2015] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND Fetuin-A and ghrelin have been implicated in cardiovascular diseases and mortality among end stage renal disease patients. The exact mechanisms have not been fully elucidated. There is robust data supporting an association between ghrelin and various cardiovascular conditions, and some common processes such as inflammation, oxidative stress, and endoplasmic reticulum stress have been implicated. AIM This study was conducted to assay serum fetuin-A and ghrelin in chronic renal failure pediatric patients and to study changes in their level that may occur after a single hemodialysis. MATERIAL AND METHODS Forty nine pediatric patients suffering from ESRD on maintenance hemodialysis (HD), 20 patients with chronic renal failure (CRF) not on dialysis and 35 healthy subjects as control group were included. The mean age of the study population was 10.58 ± 3.94, 10.62 ± 3.24 and 10.61 ± 3.97 years respectively. Serum fetuin-A and plasma acyl ghrelin levels were measured by using ELISA method. RESULTS The present study revealed that predialysis serum fetuin-A level was significantly increased in pediatric HD patients compared with the normal population, while ghrelin levels were significantly reduced. Furthermore, serum levels of fetuin-A decreased significantly after a single HD session. CONCLUSION Our study concluded that fetuin-A and acyl ghrelin may play a role in inflammatory process among HD pediatric patients which may account for cardiovascular insults and mortality but their use as biochemical markers among ESRD pediatric patients have limitations due to wide fluctuations.
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Affiliation(s)
| | | | - Ahmed Badr
- Department of Pediatrics, Faculty of Medicine, Cairo University, Cairo, Egypt
| | | | - Shadia Ragab
- Department of Clinical Pathology, National Research Centre, Cairo, Egypt
| | - Hebatallah Farouk
- Department of Clinical Pathology, National Research Centre, Cairo, Egypt
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Malnutrition Markers and Serum Ghrelin Levels in Hemodialysis Patients. INTERNATIONAL SCHOLARLY RESEARCH NOTICES 2014; 2014:765895. [PMID: 27433541 PMCID: PMC4897115 DOI: 10.1155/2014/765895] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/19/2014] [Revised: 09/28/2014] [Accepted: 10/02/2014] [Indexed: 11/18/2022]
Abstract
Objective. The aim of study was to investigate the changes levels of serum ghrelin in HD patients and its relationship to some malnutrition markers compared with healthy controls. Methods. Forty-five patients on hemodialysis and forty healthy controls were studied. Biochemical parameters and serum ghrelin levels were measured. Both daily dietary intakes and body mass index (BMI) assessments were performed for evaluation of nutritional status. Results. Ghrelin concentrations were significantly reduced in patients undergoing hemodialysis when compared to healthy controls (5 ± 0.68 (1.1–18.5) pg/mL versus 7.8 ± 0.84 (2.4–18.3) pg/mL; P = 0.004). BMI and serum albumin in HD patients were markedly reduced compared to controls. The patients with an insufficient intake of energy and protein demonstrated slightly lower levels of serum ghrelin. A negative correlation between serum ghrelin concentration with age (r = −0.34, P = 0.02), BUN (r = −0.26, P < 0.01), and serum creatinine (r = −0.27, P < 0.01) was observed in HD patients. Conclusions. The findings suggest that decreased ghrelin levels in HD patients might be associated with anorexia. Further studies are needed to determine changes in serum ghrelin levels during dialysis and to clarify whether the decrease in ghrelin levels contributes to the malnutrition that is common in these patients.
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8
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Mak RH, Cheung WW, Zhan JY, Shen Q, Foster BJ. Cachexia and protein-energy wasting in children with chronic kidney disease. Pediatr Nephrol 2012; 27:173-81. [PMID: 21298504 PMCID: PMC3249542 DOI: 10.1007/s00467-011-1765-5] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2010] [Revised: 12/13/2010] [Accepted: 12/16/2010] [Indexed: 11/24/2022]
Abstract
Children with chronic kidney disease (CKD) are at risk for "cachexia" or "protein-energy wasting" (PEW). These terms describe a pathophysiologic process resulting in the loss of muscle, with or without loss of fat, and involving maladaptive responses, including anorexia and elevated metabolic rate. PEW has been defined specifically in relation to CKD. We review the diagnostic criteria for cachexia and PEW in CKD and consider the limitations and applicability of these criteria to children with CKD. In addition, we present an overview of the manifestations and mechanisms of cachexia and PEW. A host of pathogenetic factors are considered, including systemic inflammation, endocrine perturbations, and abnormal neuropeptide signaling, as well as poor nutritional intake. Mortality risk, which is 100- to 200-fold higher in patients with end-stage renal disease than in the general population, is strongly correlated with the components of cachexia/PEW. Further research into the causes and consequences of wasting and growth retardation is needed in order to improve the survival and quality of life for children with CKD.
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Affiliation(s)
- Robert H. Mak
- Division of Nephrology, Department of Pediatrics, Rady Children’s Hospital, University of California San Diego, San Diego, CA USA ,University of California San Diego, 9500 Gilman Drive, MCO634, La Jolla, CA 92093-0634 USA
| | - Wai W. Cheung
- Division of Nephrology, Department of Pediatrics, Rady Children’s Hospital, University of California San Diego, San Diego, CA USA
| | - Jian-Ying Zhan
- Children’s Hospital, Zhejiang University, Hangzhou, China
| | - Qian Shen
- Children’s Hospital, Fudan University, Shanghai, China
| | - Bethany J. Foster
- Division of Nephrology, Department of Pediatrics, Montreal Children’s Hospital, McGill University Health Centre, Montreal, Quebec Canada
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Akamizu T, Kangawa K. Therapeutic applications of ghrelin to cachexia utilizing its appetite-stimulating effect. Peptides 2011; 32:2295-300. [PMID: 21635929 DOI: 10.1016/j.peptides.2011.05.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2011] [Revised: 05/13/2011] [Accepted: 05/16/2011] [Indexed: 02/07/2023]
Abstract
Ghrelin, which is a natural ligand for the growth hormone (GH)-secretagogue receptor (GHS-R), stimulates food intake in both animals and humans. Ghrelin is the only circulating hormone known to stimulate appetite in humans. Ghrelin also stimulates GH secretion and inhibits the production of anorectic proinflammatory cytokines. As GH is an anabolic hormone, protein stores are spared at the expense of fat during conditions of caloric restriction. Thus, ghrelin exhibits anti-cachectic actions via both GH-dependent and -independent mechanisms. Several studies are evaluating the efficacy of ghrelin in the treatment of cachexia caused by a variety of diseases, including congestive heart failure, chronic obstructive pulmonary disease, cancer, and end-stage renal disease. These studies will hopefully lead to the development of novel therapeutic applications for ghrelin in the future. This review summarizes the recent advances in this area of research.
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Affiliation(s)
- Takashi Akamizu
- The First Department of Medicine, Wakayama Medical University, Wakayama 641-8509, Japan.
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10
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Mak RH, Ikizler AT, Kovesdy CP, Raj DS, Stenvinkel P, Kalantar-Zadeh K. Wasting in chronic kidney disease. J Cachexia Sarcopenia Muscle 2011; 2:9-25. [PMID: 21475675 PMCID: PMC3063874 DOI: 10.1007/s13539-011-0019-5] [Citation(s) in RCA: 181] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Accepted: 01/25/2011] [Indexed: 11/17/2022] Open
Abstract
Wasting/cachexia is prevalent among patients with chronic kidney disease (CKD). It is to be distinguished from malnutrition, which is defined as the consequence of insufficient food intake or an improper diet. Malnutrition is characterized by hunger, which is an adaptive response, whereas anorexia is prevalent in patients with wasting/cachexia. Energy expenditure decreases as a protective mechanism in malnutrition whereas it remains inappropriately high in cachexia/wasting. In malnutrition, fat mass is preferentially lost and lean body mass and muscle mass is preserved. In cachexia/wasting, muscle is wasted and fat is relatively underutilized. Restoring adequate food intake or altering the composition of the diet reverses malnutrition. Nutrition supplementation does not totally reverse cachexia/wasting. The diagnostic criteria of cachexia/protein-energy wasting in CKD are considered. The association of wasting surrogates, such as serum albumin and prealbumin, with mortality is strong making them robust outcome predictors. At the patient level, longevity has consistently been observed in patients with CKD who have more muscle and/or fat, who report better appetite and who eat more. Although inadequate nutritional intake may contribute to wasting or cachexia, recent evidence indicates that other factors, including systemic inflammation, perturbations of appetite-controlling hormones from reduced renal clearance, aberrant neuropeptide signaling, insulin and insulin-like growth factor resistance, and metabolic acidosis, may be important in the pathogenesis of CKD-associated wasting. A number of novel therapeutic approaches, such as ghrelin agonists and melanocortin receptor antagonists are currently at the experimental level and await confirmation by randomized controlled clinical trials in patients with CKD-associated cachexia/wasting syndrome.
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Affiliation(s)
- Robert H. Mak
- Division of Pediatric Nephrology, University of California San Diego, 9500 Gilman Drive. MC 0634, La Jolla, CA 92093-0634 USA
- Rady Children’s Hospital of San Diego, San Diego, CA 92093-0634 USA
| | - Alp T. Ikizler
- Division of Nephrology, Vanderbilt University Med. Center, Nashville, TN USA
| | - Csaba P. Kovesdy
- Division of Nephrology, University of Virginia, Charlottesville, VA USA
- Division of Nephrology, Salem Veterans Affairs Medical Center, Salem, VA USA
| | - Dominic S. Raj
- Division of Renal Diseases and Hypertension, The George Washington University, Washington, DC USA
| | - Peter Stenvinkel
- Division of Renal Medicine, Karolinska University Hospital at Huddinge, Karolinska Institutet, Stockholm, Sweden
| | - Kamyar Kalantar-Zadeh
- Harold Simmons Center for Kidney Disease Research and Epidemiology, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA USA
- Division of Nephrology and Hypertension, Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA USA
- David Geffen School of Medicine at UCLA, Los Angeles, CA USA
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11
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Abstract
Ghrelin, a natural ligand for the growth hormone (GH)-secretagogue receptor, is primarily produced in the stomach. Administration of ghrelin stimulates food intake and GH secretion in both animals and humans. Ghrelin is the only circulating hormone known to stimulate appetite in humans. As GH is an anabolic hormone, protein stores are spared at the expense of fat during conditions of caloric restriction. Ghrelin also inhibits the production of anorectic proinflammatory cytokines. Thus, ghrelin exhibits anti-cachectic actions via both GH-dependent and -independent mechanisms. Several studies are evaluating the efficacy of ghrelin in the treatment of cachexia caused by a variety of diseases, including congestive heart failure, chronic obstructive pulmonary disease, cancer, and end-stage renal disease. These studies will hopefully lead to the development of novel clinical applications for ghrelin in the future. These studies have also facilitated a better understanding of the molecular basis of the anti-catabolic effects of ghrelin. This review summarizes the recent advances in this area of research.
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12
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Plasma levels of acylated and total ghrelin in pediatric patients with chronic kidney disease. Pediatr Nephrol 2010; 25:2477-82. [PMID: 20734087 DOI: 10.1007/s00467-010-1628-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2010] [Revised: 07/20/2010] [Accepted: 07/22/2010] [Indexed: 12/31/2022]
Abstract
This cross-sectional study set out to compare total and acyl ghrelin levels in children with mild chronic kidney disease (CKD) undergoing conservative treatment (n = 19) with children with end-stage renal disease (ESRD) undergoing hemodialysis (n = 24), and with healthy controls (n = 20). The relationship between ghrelin levels and parameters of renal function, nutritional status, and selective hormones were investigated. ESRD patients had higher total ghrelin levels than those with mild CKD or control individuals. However, acyl ghrelin did not differ between groups, indicating that the excess circulating ghrelin was desacylated. Since desacyl ghrelin has been shown to inhibit appetite, increased levels might contribute to protein-energy wasting in pediatric renal patients. When all 43 renal patients were combined, multiple regression analysis found age and glomerular filtration rate (GFR) to be significant negative predictors of total ghrelin. Acyl ghrelin was influenced negatively by age and positively by energy intake. Acyl to total ghrelin ratio related positively to GFR and energy intake. The results indicate that total but not acyl ghrelin is influenced by low GFR in children with CKD and suggests that ghrelin activation may be impaired in these patients. Since energy intake is a positive predictor of acyl ghrelin, the physiological control of ghrelin secretion appears to be altered in pediatric renal patients.
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13
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Santos F, Moreno ML, Neto A, Ariceta G, Vara J, Alonso A, Bueno A, Afonso AC, Correia AJ, Muley R, Barrios V, Gómez C, Argente J. Improvement in growth after 1 year of growth hormone therapy in well-nourished infants with growth retardation secondary to chronic renal failure: results of a multicenter, controlled, randomized, open clinical trial. Clin J Am Soc Nephrol 2010; 5:1190-7. [PMID: 20522533 DOI: 10.2215/cjn.07791109] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND AND OBJECTIVES Our aim was to evaluate the growth-promoting effect of growth hormone (GH) treatment in infants with chronic renal failure (CRF) and persistent growth retardation despite adequate nutritional and metabolic management. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS The study design included randomized, parallel groups in an open, multicenter trial comparing GH (0.33 mg/kg per wk) with nontreatment with GH during 12 months. Sixteen infants who had growth retardation, were aged 12+/-3 months, had CRF (GFR<or=60 ml/min per 1.73 m2), and had adequate nutritional intake and good metabolic control were recruited from eight pediatric nephrology departments from Spain and Portugal. Main outcome measures were body length, body weight, bone age, biochemical and hormonal analyses, renal function, bone mass, and adverse effects. RESULTS Length gain in infants who were treated with GH was statistically greater (P<0.05) than that of nontreated children (14.5 versus 9.5 cm/yr; SD score 1.43 versus -0.11). The GH-induced stimulation of growth was associated with no undesirable effects on bone maturation, renal failure progression, or metabolic control. In addition, GH treatment improved forearm bone mass and increased serum concentrations of total and free IGF-I and IGF-binding protein 3 (IGFBP-3), whereas IGF-II, IGFBP-1, IGFBP-2, GH-binding protein, ghrelin, and leptin were not modified. CONCLUSIONS Infants with CRF and growth retardation despite good metabolic and nutritional control benefit from GH treatment without adverse effects during 12 months of therapy.
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Affiliation(s)
- Fernando Santos
- Department of Pediatric Nephrology, Hospital Universitario Central de Asturias, Universidad de Oviedo, Celestino Villamil, s/n, E33006 Oviedo, Spain.
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Cheung WW, Mak RH. Ghrelin in chronic kidney disease. INTERNATIONAL JOURNAL OF PEPTIDES 2010; 2010:567343. [PMID: 20721357 PMCID: PMC2915808 DOI: 10.1155/2010/567343] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 11/14/2009] [Accepted: 02/08/2010] [Indexed: 01/24/2023]
Abstract
Patients with chronic kidney disease (CKD) often exhibit symptoms of anorexia and cachexia, which are associated with decreased quality of life and increased mortality. Chronic inflammation may be an important mechanism for the development of anorexia, cachexia, renal osteodystrophy, and increased cardiovascular risk in CKD. Ghrelin is a gastric hormone. The biological effects of ghrelin are mediated through the growth hormone secretagogue receptor (GHSR). The salutary effects of ghrelin on food intake and meal appreciation suggest that ghrelin could be an effective treatment for anorexic CKD patients. In addition to its appetite-stimulating effects, ghrelin has been shown to possess anti-inflammatory properties. The known metabolic effects of ghrelin and the potential implications in CKD will be discussed in this review. The strength, shortcomings, and unanswered questions related to ghrelin treatment in CKD will be addressed.
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Affiliation(s)
- Wai W. Cheung
- Division of Pediatric Nephrology, Department of Pediatrics, University of California San Diego, 9500 Gilman Drive, Mail code no. 0634, La Jolla, CA 92093-0634, USA
| | - Robert H. Mak
- Division of Pediatric Nephrology, Department of Pediatrics, University of California San Diego, 9500 Gilman Drive, Mail code no. 0634, La Jolla, CA 92093-0634, USA
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Caliskan Y, Gorgulu N, Yelken B, Yazici H, Oflaz H, Elitok A, Turkmen A, Bozfakioglu S, Sever MS. Plasma Ghrelin Levels Are Associated with Coronary Microvascular and Endothelial Dysfunction in Peritoneal Dialysis Patients. Ren Fail 2009; 31:807-13. [DOI: 10.3109/08860220903151419] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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