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McLean S, Lee M, Liu W, Hameed R, Gujjala VA, Zhou X, Kaeberlein M, Kaya A. Molecular Mechanisms of Genotype-Dependent Lifespan Variation Mediated by Caloric Restriction: Insight from Wild Yeast Isolates. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.17.585422. [PMID: 38559208 PMCID: PMC10979966 DOI: 10.1101/2024.03.17.585422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Caloric restriction (CR) is known to extend lifespan across different species and holds great promise for preventing human age-onset pathologies. However, two major challenges exist. First, despite extensive research, the mechanisms of lifespan extension in response to CR remain elusive. Second, genetic differences causing variations in response to CR and genetic factors contributing to variability of CR response on lifespan are largely unknown. Here, we took advantage of natural genetic variation across 46 diploid wild yeast isolates of Saccharomyces species and the lifespan variation under CR conditions to uncover the molecular factors associated with CR response types. We identified genes and metabolic pathways differentially regulated in CR-responsive versus non-responsive strains. Our analysis revealed that altered mitochondrial function and activation of GCN4-mediated environmental stress response are inevitably linked to lifespan variation in response to CR and a unique mitochondrial metabolite might be utilized as a predictive marker for CR response rate. In sum, our data suggests that the effects of CR on longevity may not be universal, even among the closely related species or strains of a single species. Since mitochondrial-mediated signaling pathways are evolutionarily conserved, the dissection of related genetic pathways will be relevant to understanding the mechanism by which CR elicits its longevity effect.
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Affiliation(s)
- Samantha McLean
- Department of Biology, Virginia Commonwealth University, Richmond, VA 23284 USA
| | - Mitchell Lee
- Department of Pathology, University of Washington, Seattle, WA, 98195, USA
- Ora Biomedical, Seattle, WA, 98168, USA
| | - Weiqiang Liu
- Key Laboratory of Animal Ecology and Conservation Biology, Chinese Academy of Sciences, Institute of Zoology, Beijing, China
| | - Rohil Hameed
- Department of Biology, Virginia Commonwealth University, Richmond, VA 23284 USA
| | - Vikas Anil Gujjala
- Department of Biology, Virginia Commonwealth University, Richmond, VA 23284 USA
| | - Xuming Zhou
- Key Laboratory of Animal Ecology and Conservation Biology, Chinese Academy of Sciences, Institute of Zoology, Beijing, China
| | - Matt Kaeberlein
- Department of Pathology, University of Washington, Seattle, WA, 98195, USA
- Optispan, Seattle, WA, 98168, USA
| | - Alaattin Kaya
- Department of Biology, Virginia Commonwealth University, Richmond, VA 23284 USA
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Kozlova A, Sarygina E, Deinichenko K, Radko S, Ptitsyn K, Khmeleva S, Kurbatov L, Spirin P, Prassolov V, Ilgisonis E, Lisitsa A, Ponomarenko E. Comparison of Alternative Splicing Landscapes Revealed by Long-Read Sequencing in Hepatocyte-Derived HepG2 and Huh7 Cultured Cells and Human Liver Tissue. BIOLOGY 2023; 12:1494. [PMID: 38132320 PMCID: PMC10740679 DOI: 10.3390/biology12121494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 11/17/2023] [Accepted: 11/25/2023] [Indexed: 12/23/2023]
Abstract
The long-read RNA sequencing developed by Oxford Nanopore Technologies provides a direct quantification of transcript isoforms, thereby making it possible to present alternative splicing (AS) profiles as arrays of single splice variants with different abundances. Additionally, AS profiles can be presented as arrays of genes characterized by the degree of alternative splicing (the DAS-the number of detected splice variants per gene). Here, we successfully utilized the DAS to reveal biological pathways influenced by the alterations in AS in human liver tissue and the hepatocyte-derived malignant cell lines HepG2 and Huh7, thus employing the mathematical algorithm of gene set enrichment analysis. Furthermore, analysis of the AS profiles as abundances of single splice variants by using the graded tissue specificity index τ provided the selection of the groups of genes expressing particular splice variants specifically in liver tissue, HepG2 cells, and Huh7 cells. The majority of these splice variants were translated into proteins products and appeal to be in focus regarding further insights into the mechanisms underlying cell malignization. The used metrics are intrinsically suitable for transcriptome-wide AS profiling using long-read sequencing.
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Affiliation(s)
- Anna Kozlova
- Institute of Biomedical Chemistry, Pogodinskaya Street 10, 119121 Moscow, Russia (S.R.)
| | - Elizaveta Sarygina
- Institute of Biomedical Chemistry, Pogodinskaya Street 10, 119121 Moscow, Russia (S.R.)
| | - Kseniia Deinichenko
- Institute of Biomedical Chemistry, Pogodinskaya Street 10, 119121 Moscow, Russia (S.R.)
| | - Sergey Radko
- Institute of Biomedical Chemistry, Pogodinskaya Street 10, 119121 Moscow, Russia (S.R.)
| | - Konstantin Ptitsyn
- Institute of Biomedical Chemistry, Pogodinskaya Street 10, 119121 Moscow, Russia (S.R.)
| | - Svetlana Khmeleva
- Institute of Biomedical Chemistry, Pogodinskaya Street 10, 119121 Moscow, Russia (S.R.)
| | - Leonid Kurbatov
- Institute of Biomedical Chemistry, Pogodinskaya Street 10, 119121 Moscow, Russia (S.R.)
| | - Pavel Spirin
- Department of Cancer Cell Biology, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilova 32, 119991 Moscow, Russia; (P.S.); (V.P.)
| | - Vladimir Prassolov
- Department of Cancer Cell Biology, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Vavilova 32, 119991 Moscow, Russia; (P.S.); (V.P.)
| | - Ekaterina Ilgisonis
- Institute of Biomedical Chemistry, Pogodinskaya Street 10, 119121 Moscow, Russia (S.R.)
| | - Andrey Lisitsa
- Institute of Biomedical Chemistry, Pogodinskaya Street 10, 119121 Moscow, Russia (S.R.)
| | - Elena Ponomarenko
- Institute of Biomedical Chemistry, Pogodinskaya Street 10, 119121 Moscow, Russia (S.R.)
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Işıldak U, Dönertaş HM. Evolutionary paths to mammalian longevity through the lens of gene expression. EMBO J 2023; 42:e114879. [PMID: 37519235 PMCID: PMC10476271 DOI: 10.15252/embj.2023114879] [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: 06/29/2023] [Accepted: 07/18/2023] [Indexed: 08/01/2023] Open
Abstract
The natural variation in mammalian longevity and its underlying mechanisms remain an active area of aging research. In the latest issue of The EMBO Journal, Liu et al (2023) analyze gene expression levels in 103 mammalian species across three tissues, revealing tissue-specific associations between gene expression patterns and longevity. Remarkably, the study suggests that methionine restriction, a strategy shown to increase lifespan, may extend beyond artificial interventions and is similarly employed by natural selection.
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Affiliation(s)
- Ulaş Işıldak
- Leibniz Institute on Aging ‐ Fritz Lipmann Institute (FLI)LeibnizGermany
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