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Beam TC, Bright M, Pearson AC, Dua I, Smith M, Dutta AK, Bhadra SC, Salman S, Strickler CN, Anderson CE, Peshkin L, Yampolsky LY. Short lifespan is one's fate, long lifespan is one's achievement: lessons from Daphnia. GeroScience 2024:10.1007/s11357-024-01244-7. [PMID: 38900345 DOI: 10.1007/s11357-024-01244-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Accepted: 06/05/2024] [Indexed: 06/21/2024] Open
Abstract
Studies of longevity rely on baseline life expectancy of reference genotypes measured in standardized conditions. Variation among labs, protocols, and genotypes makes longevity intervention studies difficult to compare. Furthermore, extending lifespan under suboptimal conditions or that of a short-lived genotype may be of a lesser theoretical and translational value than extending the maximal possible lifespan. Daphnia is becoming a model organism of choice for longevity research complementing data obtained on traditional models. In this study, we report longevity of several genotypes of a long-lived species D. magna under a variety of protocols, aiming to document the highest lifespan, factors reducing it, and parameters that change with age and correlate with longevity. Combining longevity data from 25 experiments across two labs, we report a strong intraspecific variation, moderate effects of group size and medium composition, and strong genotype-by-environment interactions with respect to food level. Specifically, short-lived genotypes show no caloric restriction (CR) effect, while long-lived ones expand their lifespan even further under CR. We find that the CR non-responsive clones show little correlation between longevity and two measures of lipid peroxidation. In contrast, the long-lived, CR-responsive clones show a positive correlation between longevity and lipid hydroperoxide abundance, and a negative correlation with MDA concentration. This indicates differences among genotypes in age-related accumulation and detoxification of LPO products and their effects on longevity. Our observations support the hypothesis that a long lifespan can be affected by CR and levels of oxidative damage, while genetically determined short lifespan remains short regardless.
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Affiliation(s)
- Thomas C Beam
- Department of Biological Sciences, East Tennessee State University, Johnson City, TN, 37601, USA
| | - Mchale Bright
- Department of Biological Sciences, East Tennessee State University, Johnson City, TN, 37601, USA
| | - Amelia C Pearson
- Department of Biological Sciences, East Tennessee State University, Johnson City, TN, 37601, USA
| | - Ishaan Dua
- Department of Biological Sciences, East Tennessee State University, Johnson City, TN, 37601, USA
| | - Meridith Smith
- Department of Biological Sciences, East Tennessee State University, Johnson City, TN, 37601, USA
| | - Ashit K Dutta
- Department of Biological Sciences, East Tennessee State University, Johnson City, TN, 37601, USA
| | - Shymal C Bhadra
- Department of Biological Sciences, East Tennessee State University, Johnson City, TN, 37601, USA
- Department of Biological Sciences, Purdue University Fort Wayne, Fort Wayne, IN, 46805, USA
| | - Saad Salman
- Department of Biological Sciences, East Tennessee State University, Johnson City, TN, 37601, USA
| | - Caleb N Strickler
- Department of Biological Sciences, East Tennessee State University, Johnson City, TN, 37601, USA
| | - Cora E Anderson
- Department of Biological Sciences, East Tennessee State University, Johnson City, TN, 37601, USA
- Department of Systems Biology, Harvard Medical School, Boston, MA, 02115, USA
| | - Leonid Peshkin
- Department of Systems Biology, Harvard Medical School, Boston, MA, 02115, USA
| | - Lev Y Yampolsky
- Department of Biological Sciences, East Tennessee State University, Johnson City, TN, 37601, USA.
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Moore TD, Martin-Creuzburg D, Yampolsky LY. Diet effects on longevity, heat tolerance, lipid peroxidation and mitochondrial membrane potential in Daphnia. Oecologia 2023; 202:151-163. [PMID: 37204498 DOI: 10.1007/s00442-023-05382-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 05/08/2023] [Indexed: 05/20/2023]
Abstract
The dietary supply of polyunsaturated fatty acids (PUFA) crucially affects animals' performance at different temperatures. However, the underlying physiological mechanisms are still insufficiently understood. Here, we analyzed lifespan and heat tolerance of four genotypes of Daphnia magna reared on either the green alga Scenedesmus obliquus that lacks long-chain (> C18) PUFA, or the heterokont alga Nannochloropsis limnetica that contains C20 PUFA, both either at saturating and near-starvation levels. A significant genotype-by-diet interaction in lifespan was observed at saturating diets. The C20 PUFA-rich diet eliminated differences in lifespan among genotypes on the PUFA-deficient diet. Corrected for body length, acute heat tolerance was higher at low than at high food concentration, at least in the older of the two age groups analyzed. Genotypes differed significantly in heat tolerance, but there were no genotype-by-diet interactions. As predicted, the C20 PUFA-rich diet resulted in higher lipid peroxidation (LPO) and a lower mitochondrial membrane potential (ΔΨm). LPO levels averaged across clones and rearing conditions were inversely related to acute heat tolerance. Yet, heat tolerance was higher on the PUFA-rich diet than on the PUFA-deficient diet, particularly in older Daphnia, indicating that the C20 PUFA-rich diet allowed Daphnia to compensate for higher LPO. In contrast, Daphnia with intermediate levels of ΔΨm showed the lowest heat tolerance. Neither LPO nor ΔΨm explained the diet effects on lifespan. We hypothesize that antioxidants present in the PUFA-rich diet may have enabled higher heat tolerance of Daphnia despite higher LPO, which may also explain the lifespan expansion of otherwise short-lived genotypes.
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Affiliation(s)
- Taraysha D Moore
- Department of Biological Sciences, East Tennessee State University, Johnson City, TN, 37614, USA
| | - Dominik Martin-Creuzburg
- Department of Aquatic Ecology, Research Station Bad Saarow, BTU Cottbus-Senftenberg, 15526, Bad Saarow, Germany
| | - Lev Y Yampolsky
- Department of Biological Sciences, East Tennessee State University, Johnson City, TN, 37614, USA.
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Anderson CE, Malek MC, Jonas-Closs RA, Cho Y, Peshkin L, Kirschner MW, Yampolsky LY. Inverse Lansing Effect: Maternal Age and Provisioning Affecting Daughters' Longevity and Male Offspring Production. Am Nat 2022; 200:704-721. [PMID: 36260845 DOI: 10.1086/721148] [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] [Indexed: 03/06/2024]
Abstract
AbstractMaternal age effects on offspring life history are known in a variety of organisms, with offspring of older mothers typically having lower life expectancy (the Lansing effect). However, there is no consensus on the generality and mechanisms of this pattern. We tested predictions of the Lansing effect in several Daphnia magna clones and observed clone-specific magnitude and direction of the maternal age effect on offspring longevity. We also report ambidirectional, genotype-specific effects of maternal age on the propensity of daughters to produce male offspring. Focusing on two clones with contrasting life histories, we demonstrate that maternal age effects can be explained by lipid provisioning of embryos by mothers of different ages. Individuals from a single-generation maternal age reversal treatment showed intermediate life span and intermediate lipid content at birth. In the clone characterized by the "inverse Lansing effect," neonates produced by older mothers showed higher mitochondrial membrane potential in neural tissues than their counterparts born to younger mothers. We conclude that an inverse Lansing effect is possible and hypothesize that it may be caused by age-specific maternal lipid provisioning creating a calorically restricted environment during embryonic development, which in turn reduces fecundity and increases life span in offspring.
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Werner C, Otte KA, von Elert E. Phenotypic convergence in a natural Daphnia population acclimated to low temperature. Ecol Evol 2021; 11:15312-15324. [PMID: 34765180 PMCID: PMC8571613 DOI: 10.1002/ece3.8217] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 09/15/2021] [Accepted: 09/27/2021] [Indexed: 11/08/2022] Open
Abstract
Fluidity of a given membrane decreases at lower ambient temperatures, whereas it rises at increasing temperatures, which is achieved through changes in membrane lipid composition. In consistence with homeoviscous adaptation theory, lower temperatures result in increased tissue concentrations of polyunsaturated fatty acids (PUFAs) in Daphnia magna, suggesting a higher PUFA requirement at lower temperatures. However, so far homeoviscous adaptation has been suggested for single or geographically separated Daphnia genotypes only. Here, we investigated changes in relative fatty acid (FA) tissue concentrations in response to a lower temperature (15°C) within a D. magna population. We determined juvenile growth rates (JGR) and FA patterns of 14 genotypes that were grown on Chlamydomonas klinobasis at 15°C and 20°C. We report significant differences of JGR and the relative body content of various FAs between genotypes at either temperature and between temperatures. Based on slopes of reaction norms, we found genotype-specific changes in FA profiles between temperatures suggesting that genotypes have different strategies to cope with changing temperatures. In a hierarchical clustering analysis, we grouped genotypes according to differences in direction and magnitude of changes in relative FA content, which resulted in three clusters of genotypes following different patterns of changes in FA composition. These patterns suggest a lower importance of the PUFA eicosapentaenoic acid (EPA, C20:5ω3) than previously assumed. We calculated an unsaturation index (UI) as a proxy for membrane fluidity at 15°C, and we neither found significant differences for this UI nor for fitness, measured as JGR, between the three genotype clusters. We conclude that these three genotype clusters represent different physiological solutions to temperature changes by altering the relative share of different FAs, but that their phenotypes converge with respect to membrane fluidity and JGR. These clusters will be subjected to different degrees of PUFA limitation when sharing the same diet.
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Affiliation(s)
- Christian Werner
- Aquatic Chemical EcologyInstitute for ZoologyUniversity of CologneKölnGermany
| | - Kathrin A. Otte
- Aquatic Chemical EcologyInstitute for ZoologyUniversity of CologneKölnGermany
| | - Eric von Elert
- Aquatic Chemical EcologyInstitute for ZoologyUniversity of CologneKölnGermany
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