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Hua D, Li X, Yuan J, Tao M, Zhang K, Zheng X, Wan Y, Gui L, Zhang Y, Wu Q. Fitness cost of spinosad resistance related to vitellogenin in Frankliniella occidentalis (Pergande). PEST MANAGEMENT SCIENCE 2023; 79:771-780. [PMID: 36264641 DOI: 10.1002/ps.7253] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 09/20/2022] [Accepted: 10/20/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND The western flower thrips Frankliniella occidentalis, a worldwide agricultural pest, has developed resistance to an array of insecticides. Spinosad resistance confers an apparent fitness cost in F. occidentalis. In the present study, we compared the reproductive capacities, ovary development, and the expression of the vitellogenin (Vg) gene in spinosad-susceptible (Ivf03) and -resistant (NIL-R) near isogenetic lines of F. occidentalis in order to clarify the reason for the fitness cost in spinosad resistance. RESULTS The NIL-R strain exhibited a 17.9% decrease in fecundity (eggs laid per female) as compared to the Ivf03 strain, and the ovariole was significantly shortened by 2.8% in the NIL-R strain relative to the Ivf03 strain. Compared to the Ivf03 strain, the expression levels of Vg mRNA and protein were downregulated by 33.7% and 32.9% in the NIL-R strain, respectively. Moreover, interference with the Vg gene significantly reduced the expression levels of Vg mRNA and protein, and decreased ovariole length, survival rates and the fecundity of both strains. CONCLUSION The results indicate that the downregulated expression of Vg may contribute to the reduction of ovariole length and consequently to a fitness cost in spinosad-resistant F. occidentalis. The results not only increase our understanding of the evolution of insecticide resistance, but also could contribute to the formulation of control strategy of F. occidentalis. © 2022 Society of Chemical Industry.
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Affiliation(s)
- Dengke Hua
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
- Institute of Agricultural Quality Standards and Testing Technology Research, Hubei Academy of Agricultural Sciences/Hubei Key Laboratory of Nutritional Quality and Safety of Agro Products, Wuhan, China
| | - Xiaoyu Li
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
- Hubei Biopesticide Engineering Research Centre, Wuhan, China
| | - Jiangjiang Yuan
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Min Tao
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Kun Zhang
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xiaobin Zheng
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yanran Wan
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Lianyou Gui
- Department of Entomology, College of Agriculture, Yangtze University, Jingzhou, China
| | - Youjun Zhang
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
- Department of Entomology, College of Agriculture, Yangtze University, Jingzhou, China
| | - Qingjun Wu
- Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China
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2
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Thimmegowda GG, Mullen S, Sottilare K, Sharma A, Mohanta R, Brockmann A, Dhandapany PS, Olsson SB. A field-based quantitative analysis of sublethal effects of air pollution on pollinators. Proc Natl Acad Sci U S A 2020; 117:20653-20661. [PMID: 32778582 PMCID: PMC7456092 DOI: 10.1073/pnas.2009074117] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
While the impact of air pollution on human health is well studied, mechanistic impacts of air pollution on wild systems, including those providing essential ecosystem services, are largely unknown, but directly impact our health and well-being. India is the world's largest fruit producer, second most populous country, and contains 9 of the world's 10 most polluted cities. Here, we sampled Giant Asian honey bees, Apis dorsata, at locations with varying air pollution levels in Bangalore, India. We observed significant correlations between increased respirable suspended particulate matter (RSPM) deposition and changes in bee survival, flower visitation, heart rate, hemocyte levels, and expression of genes related to lipid metabolism, stress, and immunity. Lab-reared Drosophila melanogaster exposed to these same sites also exhibited similar molecular and physiological differences. Our study offers a quantitative analysis on the current impacts of air pollution on insects, and indicates the urgency for more nonhuman studies to accurately assess the effects of pollution on our natural world.
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Affiliation(s)
- Geetha G Thimmegowda
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore, India 560065;
| | - Susan Mullen
- Massachusetts Institute of Technology, Cambridge, MA 02139
| | | | - Ankit Sharma
- Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, India 560065
| | - Rishika Mohanta
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore, India 560065
| | - Axel Brockmann
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore, India 560065
| | - Perundurai S Dhandapany
- Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, India 560065
- The Knight Cardiovascular Institute, Oregon Health and Science University, Portland, OR 97239
- Department of Medicine and Molecular and Medical Genetics, Oregon Health and Science University, Portland, OR 97239
| | - Shannon B Olsson
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bangalore, India 560065;
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Alonso-Alvarez C, Canelo T, Romero-Haro AÁ. The Oxidative Cost of Reproduction: Theoretical Questions and Alternative Mechanisms. Bioscience 2017. [DOI: 10.1093/biosci/biw176] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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4
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Seah NE, de Magalhaes Filho CD, Petrashen AP, Henderson HR, Laguer J, Gonzalez J, Dillin A, Hansen M, Lapierre LR. Autophagy-mediated longevity is modulated by lipoprotein biogenesis. Autophagy 2016; 12:261-72. [PMID: 26671266 PMCID: PMC4836030 DOI: 10.1080/15548627.2015.1127464] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Autophagy-dependent longevity models in C. elegans display altered lipid storage profiles, but the contribution of lipid distribution to life-span extension is not fully understood. Here we report that lipoprotein production, autophagy and lysosomal lipolysis are linked to modulate life span in a conserved fashion. We find that overexpression of the yolk lipoprotein VIT/vitellogenin reduces the life span of long-lived animals by impairing the induction of autophagy-related and lysosomal genes necessary for longevity. Accordingly, reducing vitellogenesis increases life span via induction of autophagy and lysosomal lipolysis. Life-span extension due to reduced vitellogenesis or enhanced lysosomal lipolysis requires nuclear hormone receptors (NHRs) NHR-49 and NHR-80, highlighting novel roles for these NHRs in lysosomal lipid signaling. In dietary-restricted worms and mice, expression of VIT and hepatic APOB (apolipoprotein B), respectively, are significantly reduced, suggesting a conserved longevity mechanism. Altogether, our study demonstrates that lipoprotein biogenesis is an important mechanism that modulates aging by impairing autophagy and lysosomal lipolysis.
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Affiliation(s)
- Nicole E Seah
- a Department of Molecular Biology , Cell Biology and Biochemistry, Brown University , Providence , RI , USA
| | - C Daniel de Magalhaes Filho
- b The Howard Hughes Medical Institute, The Glenn Center for Aging Research, The Salk Institute for Biological Studies , La Jolla , CA , USA.,c The Howard Hughes Medical Institute, Molecular and Cell Biology Department, Li Ka Shing Center, University of California Berkeley , Berkeley , CA , USA
| | - Anna P Petrashen
- a Department of Molecular Biology , Cell Biology and Biochemistry, Brown University , Providence , RI , USA
| | - Hope R Henderson
- c The Howard Hughes Medical Institute, Molecular and Cell Biology Department, Li Ka Shing Center, University of California Berkeley , Berkeley , CA , USA.,d Del E. Webb Neuroscience , Aging and Stem Cell Research Center, Program of Development and Aging, Sanford-Burnham Medical Research Institute , La Jolla , CA , USA
| | - Jade Laguer
- d Del E. Webb Neuroscience , Aging and Stem Cell Research Center, Program of Development and Aging, Sanford-Burnham Medical Research Institute , La Jolla , CA , USA
| | - Julissa Gonzalez
- d Del E. Webb Neuroscience , Aging and Stem Cell Research Center, Program of Development and Aging, Sanford-Burnham Medical Research Institute , La Jolla , CA , USA
| | - Andrew Dillin
- b The Howard Hughes Medical Institute, The Glenn Center for Aging Research, The Salk Institute for Biological Studies , La Jolla , CA , USA.,c The Howard Hughes Medical Institute, Molecular and Cell Biology Department, Li Ka Shing Center, University of California Berkeley , Berkeley , CA , USA
| | - Malene Hansen
- d Del E. Webb Neuroscience , Aging and Stem Cell Research Center, Program of Development and Aging, Sanford-Burnham Medical Research Institute , La Jolla , CA , USA
| | - Louis R Lapierre
- a Department of Molecular Biology , Cell Biology and Biochemistry, Brown University , Providence , RI , USA.,d Del E. Webb Neuroscience , Aging and Stem Cell Research Center, Program of Development and Aging, Sanford-Burnham Medical Research Institute , La Jolla , CA , USA
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5
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Ligand-Bound GeneSwitch Causes Developmental Aberrations in Drosophila that Are Alleviated by the Alternative Oxidase. G3-GENES GENOMES GENETICS 2016; 6:2839-46. [PMID: 27412986 PMCID: PMC5015941 DOI: 10.1534/g3.116.030882] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Culture of Drosophila expressing the steroid-dependent GeneSwitch transcriptional activator under the control of the ubiquitous α-tubulin promoter was found to produce extensive pupal lethality, as well as a range of dysmorphic adult phenotypes, in the presence of high concentrations of the inducing drug RU486. Prominent among these was cleft thorax, seen previously in flies bearing mutant alleles of the nuclear receptor Ultraspiracle and many other mutants, as well as notched wings, leg malformations, and bristle abnormalities. Neither the α-tubulin-GeneSwitch driver nor the inducing drug on their own produced any of these effects. A second GeneSwitch driver, under the control of the daughterless promoter, which gave much lower and more tissue-restricted transgene expression, exhibited only mild bristle abnormalities in the presence of high levels of RU486. Coexpression of the alternative oxidase (AOX) from Ciona intestinalis produced a substantial shift in the developmental outcome toward a wild-type phenotype, which was dependent on the AOX expression level. Neither an enzymatically inactivated variant of AOX, nor GFP, or the alternative NADH dehydrogenase Ndi1 from yeast gave any such rescue. Users of the GeneSwitch system should be aware of the potential confounding effects of its application in developmental studies.
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6
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Rodrigues MA, Flatt T. Endocrine uncoupling of the trade-off between reproduction and somatic maintenance in eusocial insects. CURRENT OPINION IN INSECT SCIENCE 2016; 16:1-8. [PMID: 27720042 DOI: 10.1016/j.cois.2016.04.013] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 04/15/2016] [Accepted: 04/25/2016] [Indexed: 05/23/2023]
Abstract
In most animals reproduction trades off with somatic maintenance and survival. Physiologically this trade-off is mediated by hormones with opposite effects on reproduction and maintenance. In many insects, this regulation is achieved by an endocrine network that integrates insulin-like/IGF-1 signaling (IIS), juvenile hormone (JH), and the yolk precursor vitellogenin (Vg) (or, more generally, yolk proteins [YPs]). Downregulation of this network promotes maintenance and survival at the expense of reproduction. Remarkably, however, queens of highly eusocial social insects exhibit both enormous reproductive output and longevity, thus escaping the trade-off. Here we argue - based on recent evidence - that the proximate reason for why eusocial insects can decouple this trade-off is that they have evolved a different 'wiring' of the IIS-JH-Vg/YP circuit.
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Affiliation(s)
- Marisa A Rodrigues
- Department of Ecology and Evolution, University of Lausanne, UNIL Sorge, Biophore, CH-1015 Lausanne, Switzerland
| | - Thomas Flatt
- Department of Ecology and Evolution, University of Lausanne, UNIL Sorge, Biophore, CH-1015 Lausanne, Switzerland.
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7
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Coelho RR, de Souza Júnior JDA, Firmino AAP, de Macedo LLP, Fonseca FCA, Terra WR, Engler G, de Almeida Engler J, da Silva MCM, Grossi-de-Sa MF. Vitellogenin knockdown strongly affects cotton boll weevil egg viability but not the number of eggs laid by females. Meta Gene 2016; 9:173-80. [PMID: 27419079 PMCID: PMC4936639 DOI: 10.1016/j.mgene.2016.06.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 06/23/2016] [Indexed: 12/18/2022] Open
Abstract
Vitellogenin (Vg), a yolk protein precursor, is the primary egg nutrient source involved in insect reproduction and embryo development. The Cotton Boll weevil (CBW) Anthonomus grandis Boheman, the most important cotton pest in Americas, accumulates large amounts of Vg during reproduction. However, the precise role of this protein during embryo development in this insect remains unknown. Herein, we investigated the effects of vitellogenin (AgraVg) knockdown on the egg-laying and egg viability in A. grandis females, and also characterized morphologically the unviable eggs. AgraVg transcripts were found during all developmental stages of A. grandis, with highest abundance in females. Silencing of AgraVg culminated in a significant reduction in transcript amount, around 90%. Despite this transcriptional reduction, egg-laying was not affected in dsRNA-treated females but almost 100% of the eggs lost their viability. Eggs from dsRNA-treated females showed aberrant embryos phenotype suggesting interference at different stages of embryonic development. Unlike for other insects, the AgraVg knockdown did not affect the egg-laying ability of A. grandis, but hampered A. grandis reproduction by perturbing embryo development. We concluded that the Vg protein is essential for A. grandis reproduction and a good candidate to bio-engineer the resistance against this devastating cotton pest.
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Affiliation(s)
- Roberta R Coelho
- University of Brasília, Brasília, DF, Brazil; Embrapa Genetic Resources and Biotechnology, Brasília, DF, Brazil
| | | | - Alexandre A P Firmino
- Embrapa Genetic Resources and Biotechnology, Brasília, DF, Brazil; Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Leonardo L P de Macedo
- Embrapa Genetic Resources and Biotechnology, Brasília, DF, Brazil; Catholic University of Brasília, Brasília, DF, Brazil
| | - Fernando C A Fonseca
- University of Brasília, Brasília, DF, Brazil; Embrapa Genetic Resources and Biotechnology, Brasília, DF, Brazil
| | | | - Gilbert Engler
- Embrapa Genetic Resources and Biotechnology, Brasília, DF, Brazil; Institut National de la Recherche Agronomique, Sophia-Antipolis, France
| | - Janice de Almeida Engler
- Embrapa Genetic Resources and Biotechnology, Brasília, DF, Brazil; Institut National de la Recherche Agronomique, Sophia-Antipolis, France
| | | | - Maria Fatima Grossi-de-Sa
- Embrapa Genetic Resources and Biotechnology, Brasília, DF, Brazil; Catholic University of Brasília, Brasília, DF, Brazil
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8
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Yamada R, Deshpande SA, Keebaugh ES, Ehrlich MR, Soto Obando A, Ja WW. Mifepristone Reduces Food Palatability and Affects Drosophila Feeding and Lifespan. J Gerontol A Biol Sci Med Sci 2016; 72:173-180. [PMID: 27093874 DOI: 10.1093/gerona/glw072] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 04/04/2016] [Indexed: 02/01/2023] Open
Abstract
The Drosophila GeneSwitch system facilitates the spatial and temporal control of gene expression through dietary supplementation of mifepristone (RU486). Because experimental and control groups differ only by treatment with RU486, confounding results from using flies of different genetic backgrounds are eliminated, making GeneSwitch especially useful in studies of aging. However, the effect of RU486 itself on longevity has not been well characterized, particularly in relation to nutritional states known to affect lifespan. Here, we show that RU486 has dose- and diet-dependent effects on longevity in both sexes. On low nutrient diets, RU486 supplementation reduces total food consumption, perhaps exacerbating undernutrition to shorten life. RU486 also inhibits proboscis extension responses to low nutrient diets, suggesting that RU486 has an aversive taste which leads to decreased food consumption and diminished longevity. RU486 is not detrimental to fly lifespan on high nutrient food, correlating with reduced effects of the drug on palatability and total consumption on rich diets. Our results highlight the critical importance of considering how food palatability and nutrient intake might be altered by dietary or drug manipulations in studies of aging and behavior.
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Affiliation(s)
- Ryuichi Yamada
- Department of Metabolism and Aging, The Scripps Research Institute, Jupiter, Florida.,Present address: Graduate School of Agricultural and Life Sciences, The University of Tokyo, Japan
| | - Sonali A Deshpande
- Department of Metabolism and Aging, The Scripps Research Institute, Jupiter, Florida.,Present address: Department of Psychiatry and Biobehavioral Sciences, Semel Institute for Neuroscience and Human Behavior, Hatos Center for Neuropharmacology, David Geffen School of Medicine, University of California, Los Angeles
| | - Erin S Keebaugh
- Department of Metabolism and Aging, The Scripps Research Institute, Jupiter, Florida
| | - Margaux R Ehrlich
- Department of Metabolism and Aging, The Scripps Research Institute, Jupiter, Florida
| | - Alina Soto Obando
- Department of Metabolism and Aging, The Scripps Research Institute, Jupiter, Florida
| | - William W Ja
- Department of Metabolism and Aging, The Scripps Research Institute, Jupiter, Florida.
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9
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Camiletti AL, Thompson GJ. Drosophila As a Genetically Tractable Model for Social Insect Behavior. Front Ecol Evol 2016. [DOI: 10.3389/fevo.2016.00040] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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10
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Kostenko VV, Kolot NV, Vorobyova LI. Research of embryonic mortality stages of Drosophila melanogaster depending on age and starvation of an imago. Russ J Dev Biol 2015. [DOI: 10.1134/s1062360415060065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Vitellogenin-RNAi and ovariectomy each increase lifespan, increase protein storage, and decrease feeding, but are not additive in grasshoppers. Biogerontology 2015; 16:761-74. [PMID: 26298568 DOI: 10.1007/s10522-015-9599-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 08/12/2015] [Indexed: 01/29/2023]
Abstract
Reduced reproduction has been shown to increase lifespan in many animals, yet the mechanisms behind this trade-off are unclear. We addressed this question by combining two distinct, direct means of life-extension via reduced reproduction, to test whether they were additive. In the lubber grasshopper, Romalea microptera, ovariectomized (OVX) individuals had a ~20% increase in lifespan and a doubling of storage relative to controls (Sham operated). Similarly, young female grasshoppers treated with RNAi against vitellogenin (the precursor to egg yolk protein) had increased fat body mass and halted ovarian growth. In this study, we compared VgRNAi to two control groups that do not reduce reproduction, namely buffer injection (Buffer) and injection with RNAi against a hexameric storage protein (Hex90RNAi). Each injection treatment was tested with and without ovariectomy. Hence, we tested feeding, storage, and lifespans in six groups: OVX and Buffer, OVX and Hex90RNAi, OVX and VgRNAi, Sham and Buffer, Sham and Hex90RNAi, and Sham and VgRNAi. Ovariectomized grasshoppers and VgRNAi grasshoppers each had similar reductions in feeding (~40%), increases in protein storage in the hemolymph (150-300%), and extensions in lifespan (13-21%). Ovariectomized grasshoppers had higher vitellogenin protein levels than did VgRNAi grasshoppers. Last but not least, when ovariectomy and VgRNAi were applied together, there was no greater effect on feeding, protein storage, or longevity. Hence, feeding regulation, and protein storage in insects, may be conserved components of life-extension via reduced reproduction.
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12
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Landis GN, Salomon MP, Keroles D, Brookes N, Sekimura T, Tower J. The progesterone antagonist mifepristone/RU486 blocks the negative effect on life span caused by mating in female Drosophila. Aging (Albany NY) 2015; 7:53-69. [PMID: 25614682 PMCID: PMC4350324 DOI: 10.18632/aging.100721] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Mating causes decreased life span in female Drosophila. Here we report that mifepristone blocked this effect, yielding life span increases up to +68%. Drug was fed to females after mating, in the absence of males, demonstrating function in females. Mifepristone did not increase life span of virgin females or males. Mifepristone reduced progeny production but did not reduce food intake. High-throughput RNA sequencing was used to identify genes up-regulated or down-regulated upon mating, and where the change was reduced by mifepristone. Five candidate positive regulators of life span were identified, including dosage compensation regulator Unr and three X-linked genes: multi sex combs (PcG gene), Dopamine 2-like receptor and CG14215. The 37 candidate negative genes included neuropeptide CNMamide and several involved in protein mobilization and immune response. The results inform the interpretation of experiments involving mifepristone, and implicate steroid hormone signaling in regulating the trade-off between reproduction and life span.
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Affiliation(s)
- Gary N Landis
- Molecular and Computational Biology Program, Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089-2910, USA
| | - Matthew P Salomon
- Molecular and Computational Biology Program, Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089-2910, USA
| | - Daniel Keroles
- Molecular and Computational Biology Program, Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089-2910, USA
| | - Nicholas Brookes
- Molecular and Computational Biology Program, Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089-2910, USA
| | - Troy Sekimura
- Molecular and Computational Biology Program, Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089-2910, USA
| | - John Tower
- Molecular and Computational Biology Program, Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089-2910, USA
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13
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Ren Y, Hughes KA. Vitellogenin family gene expression does not increase Drosophila lifespan or fecundity. F1000Res 2014; 3:125. [PMID: 25110583 PMCID: PMC4111121 DOI: 10.12688/f1000research.3975.1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/27/2014] [Indexed: 12/11/2022] Open
Abstract
One of the most striking patterns in comparative biology is the negative correlation between lifespan and fecundity observed in comparisons among species. This pattern is consistent with the idea that organisms need to allocate a fixed energy budget among competing demands of growth, development, reproduction and somatic maintenance. However, exceptions to this pattern have been observed in many social insects, including ants, bees, and termites. In honey bees (
Apismellifera),
Vitellogenin (
Vg), a yolk protein precursor, has been implicated in mediating the long lifespan and high fecundity of queen bees. To determine if
Vg-like proteins can regulate lifespan in insects generally, we examined the effects of expression of
ApisVg and
Drosophila CG31150 (a
Vg-like gene recently identified as
cv-d) on
Drosophilamelanogaster lifespan and fecundity using the RU486-inducible GeneSwitch system. For all genotypes tested, overexpression of
Vg and
CG31150 decreased
Drosophila lifespan and did not affect total or age-specific fecundity. We also detected an apparent effect of the GeneSwitch system itself, wherein RU486 exposure (or the GAL4 expression it induces) led to a significant increase in longevity and decrease in fecundity in our fly strains. This result is consistent with the pattern reported in a recent meta-analysis of
Drosophila aging studies, where transgenic constructs of the UAS/GAL4 expression system that should have no effect (e.g. an uninduced GeneSwitch) significantly extended lifespan in some genetic backgrounds. Our results suggest that
Vg-family genes are not major regulators of
Drosophila life history traits, and highlight the importance of using appropriate controls in aging studies.
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Affiliation(s)
- Yingxue Ren
- Department of Biological Science, Florida State University, Tallahassee, FL 32306, USA
| | - Kimberly A Hughes
- Department of Biological Science, Florida State University, Tallahassee, FL 32306, USA
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