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Navas-Enamorado C, Capo X, Galmes-Panades AM, Ortega-Moral A, Sánchez-Polo A, Masmiquel L, Torrens-Mas M, Navas P, Gonzalez-Freire M. The association of circulating bioenergetic metabolites with healthy human aging. Exp Gerontol 2024; 194:112488. [PMID: 38879093 DOI: 10.1016/j.exger.2024.112488] [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: 03/01/2024] [Revised: 04/25/2024] [Accepted: 06/10/2024] [Indexed: 06/18/2024]
Abstract
Aging is an inevitable and gradual decline in several biological functions. Mitochondrial dysfunction is one of the most important hallmarks of aging. In this context, alterations in metabolites associated with mitochondrial dysfunction may serve as a significant biomarker. This study aimed to investigate the existence of a relationship between the key metabolites involved in bioenergetics metabolism and aging. 53 volunteers ranged 20-85 years participated in the study. We tested the association between different tricarboxylic acid (TCA) cycle metabolites, fatty acid metabolism, and amino acid metabolism with age, sex, body composition, and proxy markers of aging such as walking speed, grip strength and chair test. We found that lactic acid negatively correlated with age while several fatty acid metabolites, such as azelaic, sebacic, and linoleic acids, showed positive correlations with age (p < 0.05). Sex-specific trends, such as glycerol, and dodecanoic acid, were also observed for certain metabolites. Furthermore, citric acid levels were found to have a significant association with physical function and body composition measures. Participants with higher citric acid levels displayed improved performance in physical tests and favorable body composition indices. Additionally, fumaric acid and adipic acid showed positive correlations with fat-free body mass, while sebacic acid was negatively associated with measures of fat mass. These findings underscore the importance of understanding the role of circulating bioenergetics metabolites with age, sex variations, and their potential implications in body composition and physical performance.
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Affiliation(s)
- C Navas-Enamorado
- Translational Research in Aging and Longevity (TRIAL) Group, Health Research Institute of the Balearic Islands (IdISBa), 07120 Palma de Mallorca, Spain
| | - X Capo
- Translational Research in Aging and Longevity (TRIAL) Group, Health Research Institute of the Balearic Islands (IdISBa), 07120 Palma de Mallorca, Spain
| | - A M Galmes-Panades
- Physical Activity and Sport Sciences Research Group (GICAFE), Institute for Educational Research and Innovation (IRIE), University of the Balearic Islands, 07120 Palma de Mallorca, Spain; Consorcio CIBER, M.P. Fisiopatología de la Obesidad y Nutrición (CIBERObn), Instituto de Salud Carlos III (ISCIII), 28029 Madrid, Spain
| | - A Ortega-Moral
- Translational Research in Aging and Longevity (TRIAL) Group, Health Research Institute of the Balearic Islands (IdISBa), 07120 Palma de Mallorca, Spain
| | - A Sánchez-Polo
- Translational Research in Aging and Longevity (TRIAL) Group, Health Research Institute of the Balearic Islands (IdISBa), 07120 Palma de Mallorca, Spain
| | - L Masmiquel
- Vascular and Metabolic Pathologies Group, Health Research Institute of the Balearic Islands (IdISBa), 07120 Palma de Mallorca, Spain
| | - M Torrens-Mas
- Translational Research in Aging and Longevity (TRIAL) Group, Health Research Institute of the Balearic Islands (IdISBa), 07120 Palma de Mallorca, Spain.
| | - P Navas
- Centro Andaluz de Biología del Desarrollo, Universidad Pablo de Olavide- Consejo superior de Investigaciones Científicas- Junta de Andalucía, Sevilla, Spain; CIBERER, Instituto de Salud Carlos III, Madrid, Spain.
| | - M Gonzalez-Freire
- Translational Research in Aging and Longevity (TRIAL) Group, Health Research Institute of the Balearic Islands (IdISBa), 07120 Palma de Mallorca, Spain; Faculty of Experimental Sciences, Universidad Francisco de Vitoria (UFV), Pozuelo de Alarcon, Madrid, Spain.
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Elnegaard JJ, Iena FM, Herold J, Lebeck J. Sex-specific effect of AQP9 deficiency on hepatic triglyceride metabolism in mice with diet-induced obesity. J Physiol 2024; 602:3131-3149. [PMID: 37026573 DOI: 10.1113/jp284188] [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: 02/17/2023] [Accepted: 04/04/2023] [Indexed: 04/08/2023] Open
Abstract
Studies in obese rats and human cell models of non-alcoholic fatty liver disease have indicated that knockdown of the hepatic glycerol channel aquaporin 9 (AQP9) leads to decreased hepatic steatosis. However, a study in leptin receptor-deficient mice did not find that knockout (KO) of AQP9 alleviated hepatic steatosis. The aim of this study was to investigate the effect of high-fat diet (HFD) on hepatic glycerol and triglyceride metabolism in male and female AQP9 KO mice. Male and female AQP9 KO mice and wild-type (WT) littermates were fed a HFD for 12 weeks. Weight, food intake and blood glucose were monitored throughout the study and tissue analysis included determination of hepatic triglyceride content and triglyceride secretion. The expression of key molecules for hepatic glycerol and triglyceride metabolism was evaluated using qPCR and western blotting. AQP9 KO and WT mice demonstrated a similar weight gain throughout the study period, and we found no evidence for AQP9 deficiency being associated with a reduced hepatic accumulation of triglyceride or a reduced blood glucose level. Instead, we show that the effect of AQP9 deficiency on hepatic lipid metabolism is sex-specific, with only male AQP9 KO mice having a reduced hepatic secretion of triglycerides and an elevated expression of peroxisome proliferator-activated receptor α. Male AQP9 KO mice had an elevated blood glucose level after 12 weeks of HFD when compared to baseline levels. Thus, we found no evidence for AQP9 inhibition being a target for alleviating the development of hepatic steatosis in mice with diet-induced obesity. KEY POINTS: This study investigates the effect of AQP9 deficiency on hepatic triglyceride metabolism in both male and female mice fed a high-fat diet (HFD) for 12 weeks. No evidence was found for AQP9 deficiency being associated with a reduced hepatic accumulation of triglyceride or a reduced blood glucose level. The effect of AQP9 deficiency on hepatic triglyceride metabolism is sex-specific. Male AQP9 KO mice had a reduced hepatic secretion of triglycerides and an elevated expression of peroxisome proliferator-activated receptor α, which likely promotes an increased hepatic fatty acid oxidation. Male AQP9 KO had an elevated blood glucose level after 12 weeks of HFD when compared to baseline levels.
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Affiliation(s)
| | | | | | - Janne Lebeck
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
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Fernández Prendes C, Castro Castro MJ, Sánchez Navarro L, Rapún Mas L, Morales Indiano C, Arrobas Velilla T. Handling of lipemic samples in the clinical laboratory. ADVANCES IN LABORATORY MEDICINE 2023; 4:5-27. [PMID: 37359904 PMCID: PMC10197190 DOI: 10.1515/almed-2023-0003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 11/11/2022] [Indexed: 06/28/2023]
Abstract
Interferences in the clinical laboratory may lead physicians misinterpret results for some biological analytes. The most common analytical interferences in the clinical laboratory include hemolysis, icterus and lipemia. Lipemia is defined as turbidity in a sample caused by the accumulation of lipoproteins, mainly very-low density lipoproteins (VLDL) and chylomicrons. Several methods are available for the detection of lipemic samples, including the lipemic index, or triglyceride quantification in serum or plasma samples, or mean corpuscular hemoglobin (MCHC) concentration in blood samples. According to the European Directive 98/79/CE, it is the responsibility of clinical laboratories to monitor the presence of interfering substances that may affect the measurement of an analyte. There is an urgent need to standardize interference studies and the way interferences are reported by manufacturers. Several methods are currently available to remove interference from lipemia and enable accurate measurement of biological quantities. The clinical laboratory should establish a protocol for the handling of lipemic samples according to the biological quantity to be tested.
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Affiliation(s)
- Carla Fernández Prendes
- Laboratory Medicine Department, Laboratori Clínic Metropolitana Nord, Hospital Universitari Germans Trias I Pujol, Badalona, Spain
- Workgroup of Lipoproteins and Cardiovascular Diseases, Spanish Society of Laboratory Medicine, Barcelona, Spain
| | - María José Castro Castro
- Workgroup of Lipoproteins and Cardiovascular Diseases, Spanish Society of Laboratory Medicine, Barcelona, Spain
- Biochemistry Core, Laboratori Clínic Territorial Metropolitana Sud, Hospital Universitari de Bellvitge, L’Hospitalet de Llobregat, Spain
| | - Lourdes Sánchez Navarro
- Haematological Core, Laboratori Clínic Territorial Metropolitana Sud, Hospital Universitari de Bellvitge, L’Hospitalet de Llobregat, Spain
| | - Loreto Rapún Mas
- Haematological Core, Laboratori Clínic Territorial Metropolitana Sud, Hospital Universitari de Bellvitge, L’Hospitalet de Llobregat, Spain
| | - Cristian Morales Indiano
- Laboratory Medicine Department, Laboratori Clínic Metropolitana Nord, Hospital Universitari Germans Trias I Pujol, Badalona, Spain
- Workgroup of Lipoproteins and Cardiovascular Diseases, Spanish Society of Laboratory Medicine, Barcelona, Spain
| | - Teresa Arrobas Velilla
- Laboratory of Nutrition and Cardiovascular Risk, Hospital Universitario Virgen Macarena, Sevilla, Spain
- Workgroup of Lipoproteins and Cardiovascular Diseases, Spanish Society of Laboratory Medicine, Barcelona, Spain
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Glycerol oxidation at Pd nanocatalysts obtained through spontaneous metal deposition on carbon substrates. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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