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Silva-Palacios A, Zúñiga-Muñoz AM, Soria-Castro E, Álvarez-León E, Nieto M, Navarrete-Anastasio G, Carbó R, García-Niño WR, López-Cervantes SP, Salas-Venegas V, Flores-Torres RP, Luna-López A, Zazueta C, Königsberg M. Cardioprotective effect of senotherapy in chronically obese middle-aged female rats may be mediated by a MERCSs/Nrf2 interaction. J Nutr Biochem 2025; 142:109923. [PMID: 40250489 DOI: 10.1016/j.jnutbio.2025.109923] [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: 12/18/2024] [Revised: 03/16/2025] [Accepted: 04/11/2025] [Indexed: 04/20/2025]
Abstract
Hypercaloric intake promotes the development of obesity, a risk factor for cardiovascular disease (CVD). In recent years, it has been suggested that senescent cells have negative implications for the outcome of these chronic pathologies, and senotherapy has emerged as a novel intervention to reduce damage to the organism. However, it is unclear whether the accumulation of senescent cells induces alterations at the cardiac level in rats fed a hypercaloric diet (HD) and if the use of senotherapeutics can reverse it. To address this question, we used middle-aged female rats fed HD from 21 days to 15 months of age. Under our experimental conditions, rats exhibited cardiac hypertrophy and fibrosis, accumulation of senescent cells, changes in mitochondrial morphology, and oxidative stress. Rats were treated for 2 months with senolytic (dasatinib + quercetin, DQ) or senomorphic (sulforaphane, SFN) agents. Interestingly, the HD rats showed cardiac improvement after the treatment. Our data suggest a possible link mechanism between Nrf2 activation and mitochondria-endoplasmic reticulum contact sites (MERCSs) preservation, activated by SFN rather than by the DQ combination, which allowed cardiac structure maintenance in HD rats decreasing the harmful effects of senescent cells.
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Affiliation(s)
- Alejandro Silva-Palacios
- Departamento de Biomedicina Cardiovascular, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico.
| | - Alejandra María Zúñiga-Muñoz
- Departamento de Biomedicina Cardiovascular, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Elizabeth Soria-Castro
- Departamento de Biomedicina Cardiovascular, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Edith Álvarez-León
- Subdirección de Investigación Básica y Tecnológica, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Mario Nieto
- Departamento de Ciencias de la Salud, División de Ciencias Biológicas y de la Salud, Universidad Autonóma Metropolitana Iztapalapa, Mexico City, Mexico
| | - Gabriela Navarrete-Anastasio
- Departamento de Biomedicina Cardiovascular, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Roxana Carbó
- Departamento de Biomedicina Cardiovascular, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Wylly Ramsés García-Niño
- Departamento de Biomedicina Cardiovascular, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Stefanie Paola López-Cervantes
- Departamento de Ciencias de la Salud, División de Ciencias Biológicas y de la Salud, Universidad Autonóma Metropolitana Iztapalapa, Mexico City, Mexico; Posgrado en Biología Experimental, Universidad Autónoma Metropolitana Iztapalala, Mexico City, Mexico
| | - Verónica Salas-Venegas
- Departamento de Ciencias de la Salud, División de Ciencias Biológicas y de la Salud, Universidad Autonóma Metropolitana Iztapalapa, Mexico City, Mexico
| | - Rosa Pamela Flores-Torres
- Departamento de Ciencias de la Salud, División de Ciencias Biológicas y de la Salud, Universidad Autonóma Metropolitana Iztapalapa, Mexico City, Mexico; Posgrado en Biología Experimental, Universidad Autónoma Metropolitana Iztapalala, Mexico City, Mexico
| | - Armando Luna-López
- Departamento de Investigación Básica, Instituto Nacional de Geriatria, Mexico City, Mexico
| | - Cecilia Zazueta
- Departamento de Biomedicina Cardiovascular, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Mina Königsberg
- Departamento de Ciencias de la Salud, División de Ciencias Biológicas y de la Salud, Universidad Autonóma Metropolitana Iztapalapa, Mexico City, Mexico.
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Balla T, Gulyas G. You better keep an eye on your contacts. Cell Calcium 2025; 126:102999. [PMID: 39862449 DOI: 10.1016/j.ceca.2025.102999] [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: 01/20/2025] [Accepted: 01/21/2025] [Indexed: 01/27/2025]
Abstract
Membrane contact sites (MCS) are specialized compartments found in all eukaryotic cells that are formed between membranes of different organelles that are in close proximity. MCS have important functions as they are sites of efficient transfer of molecules between neighboring organelles. Two recent articles have used the splitFAST system to mark and follow the dynamics of membrane contact sites and used the method to highlight the importance of MCS between the endoplasmic reticulum (ER) and lipid droplets in metabolic adaptation and MCS between the ER and mitochondria in Ca2+ signal propagation.
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Affiliation(s)
- Tamas Balla
- Section on Molecular Signal Transduction, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA.
| | - Gergo Gulyas
- Section on Molecular Signal Transduction, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA
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Monaghan RM. The fundamental role of mitochondria-endoplasmic reticulum contacts in ageing and declining healthspan. Open Biol 2025; 15:240287. [PMID: 39933574 PMCID: PMC11813573 DOI: 10.1098/rsob.240287] [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: 10/02/2024] [Revised: 12/20/2024] [Accepted: 01/09/2025] [Indexed: 02/13/2025] Open
Abstract
This open question research article highlights mitochondria-associated endoplasmic reticulum (ER) membranes (MAMs), which have emerged as crucial cellular structures that challenge our traditional understanding of organelle function. This review highlights the critical importance of MAMs as a frontier in cell biology with far-reaching implications for health, disease and ageing. MAMs serve as dynamic communication hubs between the ER and mitochondria, orchestrating essential processes such as calcium signalling, lipid metabolism and cellular stress responses. Recent research has implicated MAM dysfunction in a wide array of conditions, including neurodegenerative diseases, metabolic disorders, cardiovascular diseases and cancer. The significant lack of biological knowledge behind MAM function emphasizes the need to study these enigmatic subcellular sites in greater detail. Key open questions include the mechanisms controlling MAM formation and disassembly, the full complement of MAM-associated proteins and how MAMs contribute to cellular decision-making and ageing processes. Advancing our understanding of MAMs through interdisciplinary approaches and cutting-edge technologies promises to reveal new insights into fundamental cellular signalling pathways and potentially lead to innovative therapeutic strategies for a range of diseases. As such, MAM research represents a critical open question in biology with the potential to transform our understanding of cellular life and human health.
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Affiliation(s)
- Richard M. Monaghan
- British Heart Foundation Centre of Research Excellence Manchester, Division of Cardiovascular Sciences, School of Medical Sciences, Faculty of Biology, Medicine, and Health, The University of Manchester, The AV Hill Building, ManchesterM13 9PT, UK
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