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Vidal Moreno de Vega C, Lemmens D, de Meeûs d’Argenteuil C, Boshuizen B, de Maré L, Leybaert L, Goethals K, de Oliveira JE, Hosotani G, Deforce D, Van Nieuwerburgh F, Devisscher L, Delesalle C. Dynamics of training and acute exercise-induced shifts in muscular glucose transporter (GLUT) 4, 8, and 12 expression in locomotion versus posture muscles in healthy horses. Front Physiol 2023; 14:1256217. [PMID: 37654675 PMCID: PMC10466803 DOI: 10.3389/fphys.2023.1256217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 07/27/2023] [Indexed: 09/02/2023] Open
Abstract
Important changes in glucose transporter (GLUT) expression should be expected if the glucose influx plays a pivotal role in fuelling or connecting metabolic pathways that are upregulated in response to exercise. The aim was to assess GLUT4, 8, and 12 dynamics in response to training and acute exercise. Methods: Sixteen untrained Standardbred mares (3-4 year) performed an incremental SET at the start and end of 8 weeks harness training. M. pectoralis (PM) and M. vastus lateralis (VL) muscle biopsies were taken before and after each SET, allowing for comparing rest and acute samples in untrained (UT) and trained (T) condition using Western Blot for GLUT quantification and Image Pro v.10 for Blot analysis. Data were normalized against GAPDH. Basal GLUT-levels of PM versus VL were analysed with the Wilcoxon matched-pairs signed rank test. The effect of acute exercise or training was assessed using the Friedman test with a post hoc Dunn's. Results: Basal GLUT4 and GLUT12 protein expression were significantly higher in the VL compared to the PM (PGLUT4 = 0.031 and PGLUT12 = 0.002). Training had no effect on basal GLUT4 expression, neither in the VL (p > 0.9999), nor the PM (p > 0.9999). However, acute exercise in trained condition significantly decreased GLUT4 expression in the VL (p = 0.0148). Neither training nor acute exercise significantly changed total GLUT8 protein expression. Training significantly decreased total GLUT12 protein expression in rest biopsies, only visible in the VL (p = 0.0359). This decrease was even more prominent in the VL after acute exercise in trained condition (PVL = 0.0025). Conclusion: The important changes seen in GLUT12 expression downregulation, both in response to training and acute exercise in the horse, the downregulation of GLUT4 expression after acute exercise in trained condition and the lack of differential shifts in GLUT8 expression in any of the studied conditions, questions the importance of glucose as substrate to fuel training and exercise in healthy horses. These findings encourage to further explore alternative fuels for their involvement in equine muscular energetics.
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Affiliation(s)
- Carmen Vidal Moreno de Vega
- Department of Translational Physiology, Infectiology and Public Health, Research Group of Comparative Physiology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Diete Lemmens
- Department of Translational Physiology, Infectiology and Public Health, Research Group of Comparative Physiology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Constance de Meeûs d’Argenteuil
- Department of Translational Physiology, Infectiology and Public Health, Research Group of Comparative Physiology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Berit Boshuizen
- Department of Translational Physiology, Infectiology and Public Health, Research Group of Comparative Physiology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
- Wolvega Equine Hospital, Oldeholtpade, Netherlands
| | - Lorie de Maré
- Department of Translational Physiology, Infectiology and Public Health, Research Group of Comparative Physiology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | - Luc Leybaert
- Department of Basic and Applied Medical Sciences, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Klara Goethals
- Biometrics Research Center, Ghent University, Ghent, Belgium
| | | | | | - Dieter Deforce
- Laboratory of Pharmaceutical Biotechnology, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
| | - Filip Van Nieuwerburgh
- Laboratory of Pharmaceutical Biotechnology, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
| | - Lindsey Devisscher
- Gut-Liver Immunopharmacology Unit, Department of Basic and Applied Medical Sciences, Liver Research Center Ghent, Ghent University, Ghent, Belgium
| | - Cathérine Delesalle
- Department of Translational Physiology, Infectiology and Public Health, Research Group of Comparative Physiology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
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2
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Matsuo S, Hiasa M, Omote H. Functional characterization and tissue localization of the facilitative glucose transporter GLUT12. J Biochem 2020; 168:611-620. [PMID: 32761185 DOI: 10.1093/jb/mvaa090] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Accepted: 06/28/2020] [Indexed: 11/13/2022] Open
Abstract
Facilitative glucose transporters (GLUTs) play crucial roles in glucose utilization and homeostasis. GLUT12 was initially isolated as a novel GLUT4-like transporter involved in insulin-dependent glucose transport. However, tissue distribution and biochemical properties of GLUT12 are not well understood. In this study, we investigated the basic kinetic properties and tissue distribution of GLUT12. Human GLUT12 and GLUT1 were overexpressed and purified using Ni-NTA column chromatography. Reconstituted proteoliposomes showed time-dependent d-glucose transport activity, which was inhibited by phloretin and dehydroascorbate. Dose dependence of glucose transport revealed a KM and Vmax values of 6.4 mM and 1.2 μmol/mg/min, respectively, indicating that GLUT12 is a high-affinity type GLUT. Glucose transport by GLUT12 was inhibited by ATP and glucose-1-phosphate, glucose-6-phosphate and disaccharides (properties similar to those of GLUT1). Indirect immunohistochemistry revealed the distribution of mouse GLUT12 in the apical region of distal tubules and collecting ducts in the kidney and epithelial cells of the jejunum. In addition to these cells, GLUT12 was present in chromaffin cells in the adrenal medulla, the anterior pituitary lobe, as well as the thyroid and pyloric glands. These tissue distributions suggest a unique function of GLUT12, besides that of an insulin-dependent glucose transport.
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Affiliation(s)
- Shunsuke Matsuo
- Department of Membrane Biochemistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8530, Japan
| | - Miki Hiasa
- Department of Membrane Biochemistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8530, Japan
| | - Hiroshi Omote
- Department of Membrane Biochemistry, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8530, Japan
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3
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Elferink H, Bruekers JPJ, Veeneman GH, Boltje TJ. A comprehensive overview of substrate specificity of glycoside hydrolases and transporters in the small intestine : "A gut feeling". Cell Mol Life Sci 2020; 77:4799-4826. [PMID: 32506169 PMCID: PMC7658089 DOI: 10.1007/s00018-020-03564-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 05/21/2020] [Accepted: 05/25/2020] [Indexed: 02/07/2023]
Abstract
The human body is able to process and transport a complex variety of carbohydrates, unlocking their nutritional value as energy source or as important building block. The endogenous glycosyl hydrolases (glycosidases) and glycosyl transporter proteins located in the enterocytes of the small intestine play a crucial role in this process and digest and/or transport nutritional sugars based on their structural features. It is for these reasons that glycosidases and glycosyl transporters are interesting therapeutic targets to combat sugar related diseases (such as diabetes) or to improve drug delivery. In this review we provide a detailed overview focused on the molecular structure of the substrates involved as a solid base to start from and to fuel research in the area of therapeutics and diagnostics.
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Affiliation(s)
- Hidde Elferink
- Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525, Nijmegen, The Netherlands
| | - Jeroen P J Bruekers
- Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525, Nijmegen, The Netherlands
| | | | - Thomas J Boltje
- Institute for Molecules and Materials, Radboud University, Heyendaalseweg 135, 6525, Nijmegen, The Netherlands.
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4
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Chiba Y, Murakami R, Matsumoto K, Wakamatsu K, Nonaka W, Uemura N, Yanase K, Kamada M, Ueno M. Glucose, Fructose, and Urate Transporters in the Choroid Plexus Epithelium. Int J Mol Sci 2020; 21:E7230. [PMID: 33008107 PMCID: PMC7582461 DOI: 10.3390/ijms21197230] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 09/25/2020] [Accepted: 09/28/2020] [Indexed: 02/07/2023] Open
Abstract
The choroid plexus plays a central role in the regulation of the microenvironment of the central nervous system by secreting the majority of the cerebrospinal fluid and controlling its composition, despite that it only represents approximately 1% of the total brain weight. In addition to a variety of transporter and channel proteins for solutes and water, the choroid plexus epithelial cells are equipped with glucose, fructose, and urate transporters that are used as energy sources or antioxidative neuroprotective substrates. This review focuses on the recent advances in the understanding of the transporters of the SLC2A and SLC5A families (GLUT1, SGLT2, GLUT5, GLUT8, and GLUT9), as well as on the urate-transporting URAT1 and BCRP/ABCG2, which are expressed in choroid plexus epithelial cells. The glucose, fructose, and urate transporters repertoire in the choroid plexus epithelium share similar features with the renal proximal tubular epithelium, although some of these transporters exhibit inversely polarized submembrane localization. Since choroid plexus epithelial cells have high energy demands for proper functioning, a decline in the expression and function of these transporters can contribute to the process of age-associated brain impairment and pathophysiology of neurodegenerative diseases.
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Affiliation(s)
- Yoichi Chiba
- Department of Pathology and Host Defense, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0793, Japan; (Y.C.); (R.M.); (K.M.); (K.W.)
| | - Ryuta Murakami
- Department of Pathology and Host Defense, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0793, Japan; (Y.C.); (R.M.); (K.M.); (K.W.)
| | - Koichi Matsumoto
- Department of Pathology and Host Defense, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0793, Japan; (Y.C.); (R.M.); (K.M.); (K.W.)
| | - Keiji Wakamatsu
- Department of Pathology and Host Defense, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0793, Japan; (Y.C.); (R.M.); (K.M.); (K.W.)
| | - Wakako Nonaka
- Department of Supportive and Promotive Medicine of the Municipal Hospital, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0793, Japan;
- Department of Gastroenterology and Neurology, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0793, Japan
| | - Naoya Uemura
- Department of Anesthesiology, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0793, Japan; (N.U.); (K.Y.)
| | - Ken Yanase
- Department of Anesthesiology, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0793, Japan; (N.U.); (K.Y.)
| | - Masaki Kamada
- Department of Neurological Intractable Disease Research, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0793, Japan;
| | - Masaki Ueno
- Department of Pathology and Host Defense, Faculty of Medicine, Kagawa University, 1750-1 Ikenobe, Miki-cho, Kita-gun, Kagawa 761-0793, Japan; (Y.C.); (R.M.); (K.M.); (K.W.)
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5
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Gil-Iturbe E, Félix-Soriano E, Sáinz N, Idoate-Bayón A, Castilla-Madrigal R, Moreno-Aliaga MJ, Lostao MP. Effect of aging and obesity on GLUT12 expression in small intestine, adipose tissue, muscle, and kidney and its regulation by docosahexaenoic acid and exercise in mice. Appl Physiol Nutr Metab 2020; 45:957-967. [PMID: 32176854 DOI: 10.1139/apnm-2019-0721] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2023]
Abstract
Obesity is characterized by excessive fat accumulation and inflammation. Aging has also been characterized as an inflammatory condition, frequently accompanied by accumulation of visceral fat. Beneficial effects of exercise and n-3 long-chain polyunsaturated fatty acids in metabolic disorders have been described. Glucose transporter 12 (GLUT12) is one of the less investigated members of the GLUT family. Glucose, insulin, and tumor necrosis factor alpha (TNF-α) induce GLUT12 translocation to the membrane in muscle, adipose tissue, and intestine. We aimed to investigate GLUT12 expression in obesity and aging, and under diet supplementation with docosahexaenoic acid (DHA) alone or in combination with physical exercise in mice. Aging increased GLUT12 expression in intestine, kidney, and adipose tissue, whereas obesity reduced it. No changes on the transporter occurred in skeletal muscle. In obese 18-month-old mice, DHA further decreased GLUT12 in the 4 organs. Aerobic exercise alone did not modify GLUT12, but the changes triggered by exercise were able to prevent the DHA-diminishing effect, and almost restored GLUT12 basal levels. In conclusion, the downregulation of metabolism in aging would be a stimulus to upregulate GLUT12 expression. Contrary, obesity, an excessive energy condition, would induce GLUT12 downregulation. The combination of exercise and DHA would contribute to restore basal function of GLUT12. Novelty In small intestine, kidney and adipose tissue aging increases GLUT12 protein expression whereas obesity reduces it. Dietary DHA decreases GLUT12 in small intestine, kidney, adipose tissue and skeletal muscle. Exercise alone does not modify GLUT12 expression, nevertheless exercise prevents the DHA-diminishing effect on GLUT12.
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Affiliation(s)
- Eva Gil-Iturbe
- Department of Nutrition, Food Science and Physiology, University of Navarra, 31008 Pamplona, Navarra, Spain
- Centre for Nutrition Research, University of Navarra, 31008 Pamplona, Navarra, Spain
| | - Elisa Félix-Soriano
- Department of Nutrition, Food Science and Physiology, University of Navarra, 31008 Pamplona, Navarra, Spain
- Centre for Nutrition Research, University of Navarra, 31008 Pamplona, Navarra, Spain
| | - Neira Sáinz
- Department of Nutrition, Food Science and Physiology, University of Navarra, 31008 Pamplona, Navarra, Spain
- Centre for Nutrition Research, University of Navarra, 31008 Pamplona, Navarra, Spain
| | - Adrián Idoate-Bayón
- Department of Nutrition, Food Science and Physiology, University of Navarra, 31008 Pamplona, Navarra, Spain
| | | | - María J Moreno-Aliaga
- Department of Nutrition, Food Science and Physiology, University of Navarra, 31008 Pamplona, Navarra, Spain
- Centre for Nutrition Research, University of Navarra, 31008 Pamplona, Navarra, Spain
- IdiSNA, Navarra Institute for Health Research, 31008 Pamplona, Navarra, Spain
- Institute of Health Carlos III (ISCIII), Biomedical Research Networking Center in Physiopathology of Obesity and Nutrition (CIBERobn), 28029 Madrid, Spain
| | - María Pilar Lostao
- Department of Nutrition, Food Science and Physiology, University of Navarra, 31008 Pamplona, Navarra, Spain
- Centre for Nutrition Research, University of Navarra, 31008 Pamplona, Navarra, Spain
- IdiSNA, Navarra Institute for Health Research, 31008 Pamplona, Navarra, Spain
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6
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Gil-Iturbe E, Solas M, Cuadrado-Tejedo M, García-Osta A, Escoté X, Ramírez MJ, Lostao MP. GLUT12 Expression in Brain of Mouse Models of Alzheimer's Disease. Mol Neurobiol 2019; 57:798-805. [PMID: 31473905 DOI: 10.1007/s12035-019-01743-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 08/19/2019] [Indexed: 12/12/2022]
Abstract
The brain depends on glucose as a source of energy. This implies the presence of glucose transporters, being GLUT1 and GLUT3 the most relevant. Expression of GLUT12 is found in mouse and human brain at low levels. We previously demonstrated GLUT12 upregulation in the frontal cortex of aged subjects that was even higher in aged Alzheimer's disease (AD) patients. However, the cause and the mechanism through which this increase occurs are still unknown. Here, we aimed to investigate whether the upregulation of GLUT12 in AD is related with aging or Aβ deposition in comparison with GLUT1, GLUT3, and GLUT4. In the frontal cortex of two amyloidogenic mouse models (Tg2576 and APP/PS1) GLUT12 levels were increased. Contrary, expression of GLUT1 and GLUT3 were decreased, while GLUT4 did not change. In aged mice and the senescence-accelerated model SAMP8, GLUT12 and GLUT4 were upregulated in comparison with young animals. GLUT1 and GLUT3 did not show significant changes with age. The effect of β-amyloid (Aβ) deposition was also evaluated in Aβ peptide i.c.v. injected mice. In the hippocampus, GLUT12 expression increased whereas GLUT4 was not modified. Consistent with the results in the amyloidogenic models, GLUT3 and GLUT1 were downregulated. In summary, Aβ increases GLUT12 protein expression in the brain pointing out a central role of the transporter in AD pathology and opening new perspectives for the treatment of this neurodegenerative disease.
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Affiliation(s)
- Eva Gil-Iturbe
- Department of Nutrition, Food Science and Physiology, University of Navarra, Irunlarrea 1, 31008, Pamplona, Spain.,Nutrition Research Centre, University of Navarra, Pamplona, Spain
| | - Maite Solas
- Department of Pharmacology and Toxicology, University of Navarra, Pamplona, Spain.,IdiSNA, Navarra Institute for Health Research, Pamplona, Spain
| | - Mar Cuadrado-Tejedo
- IdiSNA, Navarra Institute for Health Research, Pamplona, Spain.,Center for Applied Medical Research (CIMA), Division of Neurosciences, University of Navarra, Pamplona, Spain.,Department of Pathology, Anatomy and Physiology, University of Navarra, Pamplona, Spain
| | - Ana García-Osta
- IdiSNA, Navarra Institute for Health Research, Pamplona, Spain.,Center for Applied Medical Research (CIMA), Division of Neurosciences, University of Navarra, Pamplona, Spain
| | - Xavier Escoté
- Nutrition Research Centre, University of Navarra, Pamplona, Spain.,Unitat de Nutrició i Salut, Centre Tecnològic de Catalunya, Eurecat, Reus, Spain
| | - María Javier Ramírez
- Department of Pharmacology and Toxicology, University of Navarra, Pamplona, Spain.,IdiSNA, Navarra Institute for Health Research, Pamplona, Spain
| | - María Pilar Lostao
- Department of Nutrition, Food Science and Physiology, University of Navarra, Irunlarrea 1, 31008, Pamplona, Spain. .,Nutrition Research Centre, University of Navarra, Pamplona, Spain. .,IdiSNA, Navarra Institute for Health Research, Pamplona, Spain.
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7
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Astiz M, Oster H. GLUT12-A promising new target for the treatment of insulin resistance in obesity and type 2 diabetes. Acta Physiol (Oxf) 2019; 226:e13329. [PMID: 31179587 DOI: 10.1111/apha.13329] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 06/05/2019] [Indexed: 11/30/2022]
Affiliation(s)
- Mariana Astiz
- Institute of Neurobiology University of Lübeck Lübeck Germany
| | - Henrik Oster
- Institute of Neurobiology University of Lübeck Lübeck Germany
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8
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Gil‐Iturbe E, Arbones‐Mainar JM, Moreno‐Aliaga MJ, Lostao MP. GLUT12 and adipose tissue: Expression, regulation and its relation with obesity in mice. Acta Physiol (Oxf) 2019; 226:e13283. [PMID: 31002200 DOI: 10.1111/apha.13283] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 04/09/2019] [Accepted: 04/12/2019] [Indexed: 12/15/2022]
Abstract
AIM The facilitative glucose transporter GLUT12 was isolated from the breast cancer cell line MCF-7 by its homology with GLUT4. GLUT12 is expressed in insulin-sensitive tissues such as adipose tissue. The aim of this work was to investigate GLUT12 expression and hormonal regulation in 3T3-L1 adipocytes and in adipose tissue of lean and diet-induced obese mice. METHODS Uptake studies were performed using radio-labelled sugars; α-methyl-d-glucose (αMG) was used as specific substrate of GLUT12. Expression and localization of GLUT12 in adipocytes were investigated by western blot and immunohistochemical methods. RESULTS GLUT12 is expressed in the peri-nuclear region of mouse adipocytes. Insulin, by AKT activation, and TNF-α, by AMPK activation, increase αMG uptake by inducing GLUT12 translocation to the membrane. In contrast, leptin and adiponectin decrease GLUT12 activity through its internalization. Under hypoxia conditions GLUT12 expression is upregulated. The response of GLUT12 to TNF-α, leptin, adiponectin and hypoxia is the opposite to that of GLUT4. In diet-induced obese mice and obese subjects, GLUT12 protein is decreased. Intraperitoneal injection of insulin increases AKT phosphorylation and GLUT12 expression, but this effect is lost in obese animals. CONCLUSION We hypothesize that GLUT12 would contribute to modulate sugar absorption in physiological and pathophysiological situations such as obesity.
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Affiliation(s)
- Eva Gil‐Iturbe
- Department of Nutrition, Food Science and Physiology University of Navarra Pamplona Spain
- Nutrition Research Centre University of Navarra Pamplona Spain
| | - José Miguel Arbones‐Mainar
- Adipocyte and Fat Biology Laboratory (AdipoFat) Unidad de Investigación Traslacional, Instituto Aragonés de Ciencias de la Salud (IACS), Instituto de Investigación Sanitaria (IIS) Zaragoza Spain
- CIBERobn, Physiopathology of Obesity and Nutrition Institute of Health Carlos III (ISCIII) Madrid Spain
| | - María J. Moreno‐Aliaga
- Department of Nutrition, Food Science and Physiology University of Navarra Pamplona Spain
- Nutrition Research Centre University of Navarra Pamplona Spain
- CIBERobn, Physiopathology of Obesity and Nutrition Institute of Health Carlos III (ISCIII) Madrid Spain
- IdiSNA Navarra Institute for Health Research Pamplona Spain
| | - María Pilar Lostao
- Department of Nutrition, Food Science and Physiology University of Navarra Pamplona Spain
- Nutrition Research Centre University of Navarra Pamplona Spain
- IdiSNA Navarra Institute for Health Research Pamplona Spain
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9
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Illsley NP, Baumann MU. Human placental glucose transport in fetoplacental growth and metabolism. Biochim Biophys Acta Mol Basis Dis 2018; 1866:165359. [PMID: 30593896 DOI: 10.1016/j.bbadis.2018.12.010] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 11/13/2018] [Accepted: 12/06/2018] [Indexed: 02/07/2023]
Abstract
While efficient glucose transport is essential for all cells, in the case of the human placenta, glucose transport requirements are two-fold; provision of glucose for the growing fetus in addition to the supply of glucose required the changing metabolic needs of the placenta itself. The rapidly evolving environment of placental cells over gestation has significant consequences for the development of glucose transport systems. The two-fold transport requirement of the placenta means also that changes in expression will have effects not only for the placenta but also for fetal growth and metabolism. This review will examine the localization, function and evolution of placental glucose transport systems as they are altered with fetal development and the transport and metabolic changes observed in pregnancy pathologies.
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Affiliation(s)
- Nicholas P Illsley
- Center for Abnormal Placentation, Department of Obstetrics and Gynecology, Hackensack University Medical Center, Hackensack, NJ, USA.
| | - Marc U Baumann
- Department of Obstetrics and Gynaecology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
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10
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Gil-Iturbe E, Castilla-Madrigal R, Barrenetxe J, Villaro AC, Lostao MP. GLUT12 expression and regulation in murine small intestine and human Caco-2 cells. J Cell Physiol 2018; 234:4396-4408. [PMID: 30352123 DOI: 10.1002/jcp.27231] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Accepted: 07/17/2018] [Indexed: 12/17/2022]
Abstract
GLUT12 was cloned from the mammary cancer cell line MCF-7, but its physiological role still needs to be elucidated. To gain more knowledge of GLUT12 function in the intestine, we investigated GLUT12 subcellular localization in the small intestine and its regulation by sugars, hormones, and intracellular mediators in Caco-2 cells and mice. Immunohistochemical methods were used to determine GLUT12 subcellular localization in human and murine small intestine. Brush border membrane vesicles were isolated for western blot analyses. Functional studies were performed in Caco-2 cells by measuring α-methyl-d-glucose (αMG) uptake in the absence of sodium. GLUT12 is located in the apical cytoplasm, below the brush border membrane, and in the perinuclear region of murine and human enterocytes. In Caco-2 cells, GLUT12 translocation to the apical membrane and α-methyl- d-glucose uptake by the transporter are stimulated by protons, glucose, insulin, tumor necrosis factor-α (TNF-α), protein kinase C, and AMP-activated protein kinase. In contrast, hypoxia decreases GLUT12 expression in the apical membrane. Upregulation of TNF-α and hypoxia-inducible factor-1α ( HIF-1α) genes is found in the jejunal mucosa of diet-induced obese mice. In these animals, GLUT12 expression in the brush border membrane is slightly decreased compared with lean animals. Moreover, an intraperitoneal injection of insulin does not induce GLUT12 translocation to the membrane, as it occurs in lean animals. GLUT12 rapid translocation to the enterocytes' apical membrane in response to glucose and insulin could be related to GLUT12 participation in sugar absorption during postprandial periods. In obesity, in which insulin sensitivity is reduced, the contribution of GLUT12 to sugar absorption is affected.
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Affiliation(s)
- Eva Gil-Iturbe
- Department of Nutrition, Food Science and Physiology, University of Navarra, Pamplona, Spain.,Nutrition Research Centre, University of Navarra, Pamplona, Spain
| | - Rosa Castilla-Madrigal
- Department of Nutrition, Food Science and Physiology, University of Navarra, Pamplona, Spain.,Nutrition Research Centre, University of Navarra, Pamplona, Spain
| | - Jaione Barrenetxe
- Department of Nutrition, Food Science and Physiology, University of Navarra, Pamplona, Spain
| | - Ana Cristina Villaro
- Department of Histology and Pathological Anatomy, University of Navarra, Pamplona, Spain
| | - María Pilar Lostao
- Department of Nutrition, Food Science and Physiology, University of Navarra, Pamplona, Spain.,Nutrition Research Centre, University of Navarra, Pamplona, Spain.,IdiSNA, Navarra Institute for Health Research, Pamplona, Spain
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11
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Carreño D, Corro N, Torres-Estay V, Véliz LP, Jaimovich R, Cisternas P, San Francisco IF, Sotomayor PC, Tanasova M, Inestrosa NC, Godoy AS. Fructose and prostate cancer: toward an integrated view of cancer cell metabolism. Prostate Cancer Prostatic Dis 2018; 22:49-58. [PMID: 30104655 DOI: 10.1038/s41391-018-0072-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 06/13/2018] [Accepted: 06/29/2018] [Indexed: 01/07/2023]
Abstract
Activation of glucose transporter-1 (Glut-1) gene expression is a molecular feature of cancer cells that increases glucose uptake and metabolism. Increased glucose uptake is the basis for the clinical localization of primary tumors using positron emission tomography (PET) and 2-deoxy-2-[18F]-fluoro-D-glucose (FDG) as a radiotracer. However, previous studies have demonstrated that a considerable number of cancers, which include prostate cancer (CaP), express low to undetectable levels of Glut-1 and that FDG-PET has limited clinical applicability in CaP. This observation could be explained by a low metabolic activity of CaP cells that may be overcome using different hexoses, such as fructose, as the preferred energy source. However, these hypotheses have not been examined critically in CaP. This review article summarizes what is currently known about transport and metabolism of hexoses, and more specifically fructose, in CaP and provides experimental evidences indicating that CaP cells may have increased capacity to transport and metabolize fructose in vitro and in vivo. Moreover, this review highlights recent findings that allow better understanding of how metabolism of fructose may regulate cancer cell proliferation and how fructose uptake and metabolism, through the de novo lipogenesis pathway, may provide new opportunities for CaP early diagnosis, staging, and treatment.
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Affiliation(s)
- Daniela Carreño
- Department of Physiology, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Néstor Corro
- Department of Physiology, Pontificia Universidad Católica de Chile, Santiago, Chile
| | | | - Loreto P Véliz
- Department of Physiology, Pontificia Universidad Católica de Chile, Santiago, Chile
| | | | - Pedro Cisternas
- Centro de Envejecimiento y Regeneración (CARE), Department of Cell Biology, Pontificia Universidad Católica de Chile, Santiago, Chile
| | | | - Paula C Sotomayor
- Center for Integrative Medicine and Innovative Science, Faculty of Medicine, Universidad Andres Bello, Santiago, Chile
| | - Marina Tanasova
- Department of Chemistry, Michigan Technological University, Houghton, MI, 49931, USA
| | - Nibaldo C Inestrosa
- Centro de Envejecimiento y Regeneración (CARE), Department of Cell Biology, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Alejandro S Godoy
- Department of Physiology, Pontificia Universidad Católica de Chile, Santiago, Chile. .,Department of Urology, Roswell Park Comprehensive Cancer Center, Buffalo, NY, 14263, USA.
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12
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Bazzone A, Zabadne AJ, Salisowski A, Madej MG, Fendler K. A Loose Relationship: Incomplete H +/Sugar Coupling in the MFS Sugar Transporter GlcP. Biophys J 2018; 113:2736-2749. [PMID: 29262366 PMCID: PMC5770559 DOI: 10.1016/j.bpj.2017.09.038] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 09/11/2017] [Accepted: 09/29/2017] [Indexed: 11/26/2022] Open
Abstract
The glucose transporter from Staphylococcus epidermidis, GlcPSe, is a homolog of the human GLUT sugar transporters of the major facilitator superfamily. Together with the xylose transporter from Escherichia coli, XylEEc, the other prominent prokaryotic GLUT homolog, GlcPSe, is equipped with a conserved proton-binding site arguing for an electrogenic transport mode. However, the electrophysiological analysis of GlcPSe presented here reveals important differences between the two GLUT homologs. GlcPSe, unlike XylEEc, does not perform steady-state electrogenic transport at symmetrical pH conditions. Furthermore, when a pH gradient is applied, partially uncoupled transport modes can be generated. In contrast to other bacterial sugar transporters analyzed so far, in GlcPSe sugar binding, translocation and release are also accomplished by the deprotonated transporter. Based on these experimental results, we conclude that coupling of sugar and H+ transport is incomplete in GlcPSe. To verify the viability of the observed partially coupled GlcPSe transport modes, we propose a universal eight-state kinetic model in which any degree of coupling is realized and H+/sugar symport represents only a specific instance. Furthermore, using sequence comparison with strictly coupled XylEEc and similar sugar transporters, we identify an additional charged residue that may be essential for effective H+/sugar symport.
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Affiliation(s)
- Andre Bazzone
- Max Planck Institute of Biophysics, Frankfurt/Main, Germany
| | | | | | - M Gregor Madej
- Max Planck Institute of Biophysics, Frankfurt/Main, Germany
| | - Klaus Fendler
- Max Planck Institute of Biophysics, Frankfurt/Main, Germany.
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13
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Avian and Mammalian Facilitative Glucose Transporters. MICROARRAYS 2017; 6:microarrays6020007. [PMID: 28379195 PMCID: PMC5487954 DOI: 10.3390/microarrays6020007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 03/15/2017] [Accepted: 03/15/2017] [Indexed: 12/17/2022]
Abstract
The GLUT members belong to a family of glucose transporter proteins that facilitate glucose transport across the cell membrane. The mammalian GLUT family consists of thirteen members (GLUTs 1-12 and H⁺-myo-inositol transporter (HMIT)). Humans have a recently duplicated GLUT member, GLUT14. Avians express the majority of GLUT members. The arrangement of multiple GLUTs across all somatic tissues signifies the important role of glucose across all organisms. Defects in glucose transport have been linked to metabolic disorders, insulin resistance and diabetes. Despite the essential importance of these transporters, our knowledge regarding GLUT members in avians is fragmented. It is clear that there are no chicken orthologs of mammalian GLUT4 and GLUT7. Our examination of GLUT members in the chicken revealed that some chicken GLUT members do not have corresponding orthologs in mammals. We review the information regarding GLUT orthologs and their function and expression in mammals and birds, with emphasis on chickens and humans.
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14
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Tumova S, Kerimi A, Porter KE, Williamson G. Transendothelial glucose transport is not restricted by extracellular hyperglycaemia. Vascul Pharmacol 2016; 87:219-229. [DOI: 10.1016/j.vph.2016.11.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 09/29/2016] [Accepted: 11/02/2016] [Indexed: 01/18/2023]
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15
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Bertinat R, Nualart F, Yáñez AJ. SGLT2 Inhibitors: Glucotoxicity and Tumorigenesis Downstream the Renal Proximal Tubule? J Cell Physiol 2015; 231:1635-7. [DOI: 10.1002/jcp.25286] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 12/09/2015] [Indexed: 12/15/2022]
Affiliation(s)
- Romina Bertinat
- Centro de Microscopía Avanzada, CMA-Bío Bío; Universidad de Concepción; Concepción Chile
| | - Francisco Nualart
- Centro de Microscopía Avanzada, CMA-Bío Bío; Universidad de Concepción; Concepción Chile
| | - Alejandro J. Yáñez
- Centro de Microscopía Avanzada, CMA-Bío Bío; Universidad de Concepción; Concepción Chile
- Instituto de Bioquímica y Microbiología; Universidad Austral de Chile; Valdivia Chile
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