Ketone Body Exposure of Cardiomyocytes Impairs Insulin Sensitivity and Contractile Function through Vacuolar-Type H<sup>+</sup>-ATPase Disassembly—Rescue by Specific Amino Acid Supplementation
The heart is metabolically flexible. Under physiological conditions, it mainly uses lipids and glucose as energy substrates. In uncontrolled diabetes, the heart switches towards predominant lipid utilization, which over time is detrimental to cardiac function. Additionally, diabetes is accompanied b...
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MDPI AG
2022-10-01
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| Series: | International Journal of Molecular Sciences |
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| Online Access: | https://www.mdpi.com/1422-0067/23/21/12909 |
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| author | Shujin Wang Dietbert Neumann B. Daan Westenbrink Francesco Schianchi Li-Yen Wong Aomin Sun Agnieszka Strzelecka Jan F. C. Glatz Joost J. F. P. Luiken Miranda Nabben |
| author_facet | Shujin Wang Dietbert Neumann B. Daan Westenbrink Francesco Schianchi Li-Yen Wong Aomin Sun Agnieszka Strzelecka Jan F. C. Glatz Joost J. F. P. Luiken Miranda Nabben |
| author_sort | Shujin Wang |
| collection | DOAJ |
| description | The heart is metabolically flexible. Under physiological conditions, it mainly uses lipids and glucose as energy substrates. In uncontrolled diabetes, the heart switches towards predominant lipid utilization, which over time is detrimental to cardiac function. Additionally, diabetes is accompanied by high plasma ketone levels and increased utilization of energy provision. The administration of exogenous ketones is currently being investigated for the treatment of cardiovascular disease. Yet, it remains unclear whether increased cardiac ketone utilization is beneficial or detrimental to cardiac functioning. The mechanism of lipid-induced cardiac dysfunction includes disassembly of the endosomal proton pump (named vacuolar-type H+-ATPase; v-ATPase) as the main early onset event, followed by endosomal de-acidification/dysfunction. The de-acidified endosomes can no longer serve as a storage compartment for lipid transporter CD36, which then translocates to the sarcolemma to induce lipid accumulation, insulin resistance, and contractile dysfunction. Lipid-induced v-ATPase disassembly is counteracted by the supply of specific amino acids. Here, we tested the effect of ketone bodies on v-ATPase assembly status and regulation of lipid uptake in rodent/human cardiomyocytes. 3-β-hydroxybutyrate (3HB) exposure induced v-ATPase disassembly and the entire cascade of events leading to contractile dysfunction and insulin resistance, similar to conditions of lipid oversupply. Acetoacetate addition did not induce v-ATPase dysfunction. The negative effects of 3HB could be prevented by addition of specific amino acids. Hence, in sedentary/prediabetic subjects ketone bodies should be used with caution because of possible aggravation of cardiac insulin resistance and further loss of cardiac function. When these latter maladaptive conditions would occur, specific amino acids could potentially be a treatment option. |
| first_indexed | 2024-03-09T19:01:26Z |
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| institution | Directory Open Access Journal |
| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-03-09T19:01:26Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Molecular Sciences |
| spelling | doaj.art-3fefaf116d7846a3b4f7ed0ca3256a622023-11-24T04:59:11ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672022-10-0123211290910.3390/ijms232112909Ketone Body Exposure of Cardiomyocytes Impairs Insulin Sensitivity and Contractile Function through Vacuolar-Type H<sup>+</sup>-ATPase Disassembly—Rescue by Specific Amino Acid SupplementationShujin Wang0Dietbert Neumann1B. Daan Westenbrink2Francesco Schianchi3Li-Yen Wong4Aomin Sun5Agnieszka Strzelecka6Jan F. C. Glatz7Joost J. F. P. Luiken8Miranda Nabben9Department of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200 MD Maastricht, The NetherlandsDepartment of Pathology, Maastricht University Medical Center<sup>+</sup>, 6200 MD Maastricht, The NetherlandsDepartment of Cardiology, University of Groningen, University Medical Center Groningen, P.O. Box 30.001, 9700 RB Groningen, The NetherlandsDepartment of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200 MD Maastricht, The NetherlandsDepartment of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200 MD Maastricht, The NetherlandsDepartment of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200 MD Maastricht, The NetherlandsDepartment of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200 MD Maastricht, The NetherlandsDepartment of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200 MD Maastricht, The NetherlandsDepartment of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200 MD Maastricht, The NetherlandsDepartment of Genetics and Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, 6200 MD Maastricht, The NetherlandsThe heart is metabolically flexible. Under physiological conditions, it mainly uses lipids and glucose as energy substrates. In uncontrolled diabetes, the heart switches towards predominant lipid utilization, which over time is detrimental to cardiac function. Additionally, diabetes is accompanied by high plasma ketone levels and increased utilization of energy provision. The administration of exogenous ketones is currently being investigated for the treatment of cardiovascular disease. Yet, it remains unclear whether increased cardiac ketone utilization is beneficial or detrimental to cardiac functioning. The mechanism of lipid-induced cardiac dysfunction includes disassembly of the endosomal proton pump (named vacuolar-type H+-ATPase; v-ATPase) as the main early onset event, followed by endosomal de-acidification/dysfunction. The de-acidified endosomes can no longer serve as a storage compartment for lipid transporter CD36, which then translocates to the sarcolemma to induce lipid accumulation, insulin resistance, and contractile dysfunction. Lipid-induced v-ATPase disassembly is counteracted by the supply of specific amino acids. Here, we tested the effect of ketone bodies on v-ATPase assembly status and regulation of lipid uptake in rodent/human cardiomyocytes. 3-β-hydroxybutyrate (3HB) exposure induced v-ATPase disassembly and the entire cascade of events leading to contractile dysfunction and insulin resistance, similar to conditions of lipid oversupply. Acetoacetate addition did not induce v-ATPase dysfunction. The negative effects of 3HB could be prevented by addition of specific amino acids. Hence, in sedentary/prediabetic subjects ketone bodies should be used with caution because of possible aggravation of cardiac insulin resistance and further loss of cardiac function. When these latter maladaptive conditions would occur, specific amino acids could potentially be a treatment option.https://www.mdpi.com/1422-0067/23/21/12909ketone bodiesvacuolar-type H+-ATPaseendosomal CD36lipid-induced insulin resistancecontractile functiondiabetic heart |
| spellingShingle | Shujin Wang Dietbert Neumann B. Daan Westenbrink Francesco Schianchi Li-Yen Wong Aomin Sun Agnieszka Strzelecka Jan F. C. Glatz Joost J. F. P. Luiken Miranda Nabben Ketone Body Exposure of Cardiomyocytes Impairs Insulin Sensitivity and Contractile Function through Vacuolar-Type H<sup>+</sup>-ATPase Disassembly—Rescue by Specific Amino Acid Supplementation International Journal of Molecular Sciences ketone bodies vacuolar-type H+-ATPase endosomal CD36 lipid-induced insulin resistance contractile function diabetic heart |
| title | Ketone Body Exposure of Cardiomyocytes Impairs Insulin Sensitivity and Contractile Function through Vacuolar-Type H<sup>+</sup>-ATPase Disassembly—Rescue by Specific Amino Acid Supplementation |
| title_full | Ketone Body Exposure of Cardiomyocytes Impairs Insulin Sensitivity and Contractile Function through Vacuolar-Type H<sup>+</sup>-ATPase Disassembly—Rescue by Specific Amino Acid Supplementation |
| title_fullStr | Ketone Body Exposure of Cardiomyocytes Impairs Insulin Sensitivity and Contractile Function through Vacuolar-Type H<sup>+</sup>-ATPase Disassembly—Rescue by Specific Amino Acid Supplementation |
| title_full_unstemmed | Ketone Body Exposure of Cardiomyocytes Impairs Insulin Sensitivity and Contractile Function through Vacuolar-Type H<sup>+</sup>-ATPase Disassembly—Rescue by Specific Amino Acid Supplementation |
| title_short | Ketone Body Exposure of Cardiomyocytes Impairs Insulin Sensitivity and Contractile Function through Vacuolar-Type H<sup>+</sup>-ATPase Disassembly—Rescue by Specific Amino Acid Supplementation |
| title_sort | ketone body exposure of cardiomyocytes impairs insulin sensitivity and contractile function through vacuolar type h sup sup atpase disassembly rescue by specific amino acid supplementation |
| topic | ketone bodies vacuolar-type H+-ATPase endosomal CD36 lipid-induced insulin resistance contractile function diabetic heart |
| url | https://www.mdpi.com/1422-0067/23/21/12909 |
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