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Gregolin CS, do Nascimento M, de Souza SLB, Mota GAF, Luvizotto RDAM, Sugizaki MM, Bazan SGZ, de Campos DHS, Camacho CRC, Cicogna AC, do Nascimento AF. Cardiac dysfunction in sucrose-fed rats is associated with alterations of phospholamban phosphorylation and TNF-α levels. Mol Cell Endocrinol 2024; 589:112236. [PMID: 38608803 DOI: 10.1016/j.mce.2024.112236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 04/02/2024] [Accepted: 04/04/2024] [Indexed: 04/14/2024]
Abstract
INTRODUCTION High sucrose intake is linked to cardiovascular disease, a major global cause of mortality worldwide. Calcium mishandling and inflammation play crucial roles in cardiac disease pathophysiology. OBJECTIVE Evaluate if sucrose-induced obesity is related to deterioration of myocardial function due to alterations in the calcium-handling proteins in association with proinflammatory cytokines. METHODS Wistar rats were divided into control and sucrose groups. Over eight weeks, Sucrose group received 30% sucrose water. Cardiac function was determined in vivo using echocardiography and in vitro using papillary muscle assay. Western blotting was used to detect calcium handling protein; ELISA assay was used to assess TNF-α and IL-6 levels. RESULTS Sucrose led to cardiac dysfunction. RYR2, SERCA2, NCX, pPBL Ser16 and L-type calcium channels were unchanged. However, pPBL-Thr17, and TNF-α levels were elevated in the S group. CONCLUSION Sucrose induced cardiac dysfunction and decreased myocardial contractility in association with altered pPBL-Thr17 and elevated cardiac pro-inflammatory TNF-α.
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Affiliation(s)
- Cristina Schmitt Gregolin
- Department of Pathology, Medical School (FMB) of São Paulo State University (Unesp), Botucatu Campus, São Paulo, Brazil
| | - Milena do Nascimento
- Institute of Health Sciences, Federal University of Mato Grosso (UFMT), Sinop, Mato Grosso, Brazil
| | | | - Gustavo Augusto Ferreira Mota
- Department of Internal Medicine, Botucatu School of Medicine, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | | | - Mário Mateus Sugizaki
- Institute of Health Sciences, Federal University of Mato Grosso (UFMT), Sinop, Mato Grosso, Brazil
| | - Silméia Garcia Zanati Bazan
- Department of Internal Medicine, Botucatu School of Medicine, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - Dijon Henrique Salomé de Campos
- Department of Internal Medicine, Botucatu School of Medicine, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - Camila Renata Corrêa Camacho
- Department of Pathology, Medical School (FMB) of São Paulo State University (Unesp), Botucatu Campus, São Paulo, Brazil
| | - Antonio Carlos Cicogna
- Department of Internal Medicine, Botucatu School of Medicine, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
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Deus AFD, Silva VLD, de Souza SLB, Mota GAF, Sant'Ana PG, Vileigas DF, Lima-Leopoldo AP, Leopoldo AS, Campos DHSD, de Tomasi LC, Padovani CR, Kolwicz SC, Cicogna AC. Myocardial Dysfunction after Severe Food Restriction Is Linked to Changes in the Calcium-Handling Properties in Rats. Nutrients 2019; 11:nu11091985. [PMID: 31443528 PMCID: PMC6770438 DOI: 10.3390/nu11091985] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 08/09/2019] [Accepted: 08/14/2019] [Indexed: 12/13/2022] Open
Abstract
Severe food restriction (FR) impairs cardiac performance, although the causative mechanisms remain elusive. Since proteins associated with calcium handling may contribute to cardiac dysfunction, this study aimed to evaluate whether severe FR results in alterations in the expression and activity of Ca2+-handling proteins that contribute to impaired myocardial performance. Male 60-day-old Wistar–Kyoto rats were fed a control or restricted diet (50% reduction in the food consumed by the control group) for 90 days. Body weight, body fat pads, adiposity index, as well as the weights of the soleus muscle and lung, were obtained. Cardiac remodeling was assessed by morphological measures. The myocardial contractile performance was analyzed in isolated papillary muscles during the administration of extracellular Ca2+ and in the absence or presence of a sarcoplasmic reticulum Ca2+-ATPase (SERCA2a) specific blocker. The expression of Ca2+-handling regulatory proteins was analyzed via Western Blot. Severe FR resulted in a 50% decrease in body weight and adiposity measures. Cardiac morphometry was substantially altered, as heart weights were nearly twofold lower in FR rats. Papillary muscles isolated from FR hearts displayed mechanical dysfunction, including decreased developed tension and reduced contractility and relaxation. The administration of a SERCA2a blocker led to further decrements in contractile function in FR hearts, suggesting impaired SERCA2a activity. Moreover, the FR rats presented a lower expression of L-type Ca2+ channels. Therefore, myocardial dysfunction induced by severe food restriction is associated with changes in the calcium-handling properties in rats.
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Affiliation(s)
- Adriana Fernandes de Deus
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University, Botucatu 18618687, Brazil
| | - Vítor Loureiro da Silva
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University, Botucatu 18618687, Brazil
| | - Sérgio Luiz Borges de Souza
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University, Botucatu 18618687, Brazil
| | | | - Paula Grippa Sant'Ana
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University, Botucatu 18618687, Brazil
| | - Danielle Fernandes Vileigas
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University, Botucatu 18618687, Brazil
| | - Ana Paula Lima-Leopoldo
- Department of Sports, Center of Physical Education and Sports, Federal University of Espírito Santo, Vitória 29075-910, Brazil
| | - André Soares Leopoldo
- Department of Sports, Center of Physical Education and Sports, Federal University of Espírito Santo, Vitória 29075-910, Brazil
| | | | - Loreta Casquel de Tomasi
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University, Botucatu 18618687, Brazil
| | - Carlos Roberto Padovani
- Department of Biostatistics, Institute of Biosciences, São Paulo State University, Botucatu 18618970, Brazil
| | - Stephen C Kolwicz
- Department of Health and Exercise Physiology, Ursinus College, Collegeville, PA 19426, USA
| | - Antonio Carlos Cicogna
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University, Botucatu 18618687, Brazil.
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