1
|
Riddle MR, Nguyen NK, Nave M, Peuß R, Maldonado E, Rohner N, Tabin CJ. Host evolution shapes gut microbiome composition in Astyanax mexicanus. Ecol Evol 2024; 14:e11192. [PMID: 38571802 PMCID: PMC10985381 DOI: 10.1002/ece3.11192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 02/21/2024] [Accepted: 03/13/2024] [Indexed: 04/05/2024] Open
Abstract
The ecological and genetic changes that underlie the evolution of host-microbe interactions remain elusive, primarily due to challenges in disentangling the variables that alter microbiome composition. To understand the impact of host habitat, host genetics, and evolutionary history on microbial community structure, we examined gut microbiomes of river- and three cave-adapted morphotypes of the Mexican tetra, Astyanax mexicanus, in their natural environments and under controlled laboratory conditions. Field-collected samples were dominated by very few taxa and showed considerable interindividual variation. We found that lab-reared fish exhibited increased microbiome richness and distinct composition compared to their wild counterparts, underscoring the significant influence of habitat. Most notably, however, we found that morphotypes reared on the same diet throughout life developed distinct microbiomes suggesting that genetic loci resulting from cavefish evolution shape microbiome composition. We observed stable differences in Fusobacteriota abundance between morphotypes and demonstrated that this could be used as a trait for quantitative trait loci mapping to uncover the genetic basis of microbial community structure.
Collapse
Affiliation(s)
| | | | | | - Robert Peuß
- Institute for Evolution and BiodiversityUniversity of MünsterMünsterGermany
| | - Ernesto Maldonado
- Institute of Marine Sciences and LimnologyUniversidad Nacional Autonoma de Mexico, UNAMPuerto MorelosMexico
| | - Nicolas Rohner
- Stowers Institute for Medical ResearchKansas CityMissouriUSA
| | | |
Collapse
|
2
|
Olsen L, Levy M, Medley JK, Hassan H, Miller B, Alexander R, Wilcock E, Yi K, Florens L, Weaver K, McKinney SA, Peuß R, Persons J, Kenzior A, Maldonado E, Delventhal K, Gluesenkamp A, Mager E, Coughlin D, Rohner N. Metabolic reprogramming underlies cavefish muscular endurance despite loss of muscle mass and contractility. Proc Natl Acad Sci U S A 2023; 120:e2204427120. [PMID: 36693105 PMCID: PMC9945943 DOI: 10.1073/pnas.2204427120] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 11/15/2022] [Indexed: 01/25/2023] Open
Abstract
Physical inactivity is a scourge to human health, promoting metabolic disease and muscle wasting. Interestingly, multiple ecological niches have relaxed investment into physical activity, providing an evolutionary perspective into the effect of adaptive physical inactivity on tissue homeostasis. One such example, the Mexican cavefish Astyanax mexicanus, has lost moderate-to-vigorous activity following cave colonization, reaching basal swim speeds ~3.7-fold slower than their river-dwelling counterpart. This change in behavior is accompanied by a marked shift in body composition, decreasing total muscle mass and increasing fat mass. This shift persisted at the single muscle fiber level via increased lipid and sugar accumulation at the expense of myofibrillar volume. Transcriptomic analysis of laboratory-reared and wild-caught cavefish indicated that this shift is driven by increased expression of pparγ-the master regulator of adipogenesis-with a simultaneous decrease in fast myosin heavy chain expression. Ex vivo and in vivo analysis confirmed that these investment strategies come with a functional trade-off, decreasing cavefish muscle fiber shortening velocity, time to maximal force, and ultimately maximal swimming speed. Despite this, cavefish displayed a striking degree of muscular endurance, reaching maximal swim speeds ~3.5-fold faster than their basal swim speeds. Multi-omic analysis suggested metabolic reprogramming, specifically phosphorylation of Pgm1-Threonine 19, as a key component enhancing cavefish glycogen metabolism and sustained muscle contraction. Collectively, we reveal broad skeletal muscle changes following cave colonization, displaying an adaptive skeletal muscle phenotype reminiscent to mammalian disuse and high-fat models while simultaneously maintaining a unique capacity for sustained muscle contraction via enhanced glycogen metabolism.
Collapse
Affiliation(s)
- Luke Olsen
- Stowers Institute for Medical Research, Kansas City, MO64110
- Department of Cell Biology and Physiology, University of Kansas Medical Center, Kansas City, KS66160
| | - Michaella Levy
- Stowers Institute for Medical Research, Kansas City, MO64110
| | - J. Kyle Medley
- Stowers Institute for Medical Research, Kansas City, MO64110
| | - Huzaifa Hassan
- Stowers Institute for Medical Research, Kansas City, MO64110
| | - Brandon Miller
- Stowers Institute for Medical Research, Kansas City, MO64110
| | | | - Emma Wilcock
- Department of Biology, Widener University, Chester, PA19013
| | - Kexi Yi
- Stowers Institute for Medical Research, Kansas City, MO64110
| | | | - Kyle Weaver
- Stowers Institute for Medical Research, Kansas City, MO64110
| | | | - Robert Peuß
- Institute for Evolution and Biodiversity, University of Münster, Münster48149, Germany
| | - Jenna Persons
- Stowers Institute for Medical Research, Kansas City, MO64110
| | | | - Ernesto Maldonado
- EvoDevo Research Group, Unidad Académica de Sistemas Arrecifales, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Puerto Morelos, Quintana Roo77580, Mexico
| | - Kym Delventhal
- Stowers Institute for Medical Research, Kansas City, MO64110
| | - Andrew Gluesenkamp
- Center for Conservation and Research, San Antonio Zoo, San Antonio, TX78212
| | - Edward Mager
- Department of Biological Sciences, Advanced Environmental Research Institute, University of North Texas, Denton, TX76203
| | - David Coughlin
- Department of Biology, Widener University, Chester, PA19013
| | - Nicolas Rohner
- Stowers Institute for Medical Research, Kansas City, MO64110
- Department of Cell Biology and Physiology, University of Kansas Medical Center, Kansas City, KS66160
| |
Collapse
|
3
|
Schulz NKE, Mohamed FF, Lo LK, Peuß R, de Buhr MF, Kurtz J. Paternal knockdown of tRNA(cytosine-5-)-methyltransferase (Dnmt2) increases offspring susceptibility to infection in red flour beetles. Insect Mol Biol 2022; 31:711-721. [PMID: 35790040 DOI: 10.1111/imb.12798] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 06/30/2022] [Indexed: 06/15/2023]
Abstract
Intergenerational effects from fathers to offspring are increasingly reported from diverse organisms, but the underlying mechanisms remain speculative. Paternal trans-generational immune priming (TGIP) was demonstrated in the red flour beetle Tribolium castaneum: non-infectious bacterial exposure of fathers protects their offspring against an infectious challenge for at least two generations. Epigenetic processes, such as cytosine methylation of nucleic acids, have been proposed to enable transfer of information from fathers to offspring. Here we studied a potential role in TGIP of the Dnmt2 gene (renamed as Trdmt1 in humans), which encodes a highly conserved enzyme that methylates different RNAs, including specific cytosines of a set of tRNAs. Dnmt2 has previously been reported to be involved in intergenerational epigenetic inheritance in mice and protection against viruses in fruit flies. We first studied gene expression and found that Dnmt2 is expressed in various life history stages and tissues of T. castaneum, with high expression in the reproductive organs. RNAi-mediated knockdown of Dnmt2 in fathers was systemic, slowed down offspring larval development and increased mortality of the adult offspring upon bacterial infection. However, these effects were independent of bacterial exposure of the fathers. In conclusion, our results point towards a role of Dnmt2 for paternal effects, while elucidation of the mechanisms behind paternal TGIP needs further studies.
Collapse
Affiliation(s)
- Nora K E Schulz
- Institute for Evolution and Biodiversity, University of Münster, Münster, Germany
| | - Fakry F Mohamed
- Institute for Evolution and Biodiversity, University of Münster, Münster, Germany
- Institute of Virology Muenster, Center for Molecular Biology of Inflammation (ZMBE), University Hospital Muenster, Muenster, Germany
| | - Lai Ka Lo
- Institute for Evolution and Biodiversity, University of Münster, Münster, Germany
| | - Robert Peuß
- Institute for Evolution and Biodiversity, University of Münster, Münster, Germany
| | - Maike F de Buhr
- Institute for Evolution and Biodiversity, University of Münster, Münster, Germany
| | - Joachim Kurtz
- Institute for Evolution and Biodiversity, University of Münster, Münster, Germany
| |
Collapse
|
4
|
Krishnan J, Wang Y, Kenzior O, Hassan H, Olsen L, Tsuchiya D, Kenzior A, Peuß R, Xiong S, Wang Y, Zhao C, Rohner N. Liver-derived cell lines from cavefish Astyanax mexicanus as an in vitro model for studying metabolic adaptation. Sci Rep 2022; 12:10115. [PMID: 35710938 PMCID: PMC9203785 DOI: 10.1038/s41598-022-14507-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 06/08/2022] [Indexed: 12/02/2022] Open
Abstract
Cell lines have become an integral resource and tool for conducting biological experiments ever since the Hela cell line was first developed (Scherer et al. in J Exp Med 97:695–710, 1953). They not only allow detailed investigation of molecular pathways but are faster and more cost-effective than most in vivo approaches. The last decade saw many emerging model systems strengthening basic science research. However, lack of genetic and molecular tools in these newer systems pose many obstacles. Astyanax mexicanus is proving to be an interesting new model system for understanding metabolic adaptation. To further enhance the utility of this system, we developed liver-derived cell lines from both surface-dwelling and cave-dwelling morphotypes. In this study, we provide detailed methodology of the derivation process along with comprehensive biochemical and molecular characterization of the cell lines, which reflect key metabolic traits of cavefish adaptation. We anticipate these cell lines to become a useful resource for the Astyanax community as well as researchers investigating fish biology, comparative physiology, and metabolism.
Collapse
Affiliation(s)
- Jaya Krishnan
- Stowers Institute for Medical Research, Kansas City, MO, USA.
| | - Yan Wang
- Stowers Institute for Medical Research, Kansas City, MO, USA
| | - Olga Kenzior
- Stowers Institute for Medical Research, Kansas City, MO, USA
| | - Huzaifa Hassan
- Stowers Institute for Medical Research, Kansas City, MO, USA
| | - Luke Olsen
- Stowers Institute for Medical Research, Kansas City, MO, USA.,Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, KS, USA
| | - Dai Tsuchiya
- Stowers Institute for Medical Research, Kansas City, MO, USA
| | | | - Robert Peuß
- Stowers Institute for Medical Research, Kansas City, MO, USA.,Institute for Evolution and Biodiversity, University of Münster, Münster, Germany
| | - Shaolei Xiong
- Stowers Institute for Medical Research, Kansas City, MO, USA.,Department of Genetics, Perelman School of Medicine, Philadelphia, PA, USA
| | - Yongfu Wang
- Stowers Institute for Medical Research, Kansas City, MO, USA
| | - Chongbei Zhao
- Stowers Institute for Medical Research, Kansas City, MO, USA
| | - Nicolas Rohner
- Stowers Institute for Medical Research, Kansas City, MO, USA. .,Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, KS, USA.
| |
Collapse
|
5
|
Medley JK, Persons J, Biswas T, Olsen L, Peuß R, Krishnan J, Xiong S, Rohner N. The metabolome of Mexican cavefish shows a convergent signature highlighting sugar, antioxidant, and Ageing-Related metabolites. eLife 2022; 11:74539. [PMID: 35703366 PMCID: PMC9200406 DOI: 10.7554/elife.74539] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 04/27/2022] [Indexed: 12/16/2022] Open
Abstract
Insights from organisms, which have evolved natural strategies for promoting survivability under extreme environmental pressures, may help guide future research into novel approaches for enhancing human longevity. The cave-adapted Mexican tetra, Astyanax mexicanus, has attracted interest as a model system for metabolic resilience, a term we use to denote the property of maintaining health and longevity under conditions that would be highly deleterious in other organisms (Figure 1). Cave-dwelling populations of Mexican tetra exhibit elevated blood glucose, insulin resistance and hypertrophic visceral adipocytes compared to surface-dwelling counterparts. However, cavefish appear to avoid pathologies typically associated with these conditions, such as accumulation of advanced-glycation-end-products (AGEs) and chronic tissue inflammation. The metabolic strategies underlying the resilience properties of A. mexicanus cavefish, and how they relate to environmental challenges of the cave environment, are poorly understood. Here, we provide an untargeted metabolomics study of long- and short-term fasting in two A. mexicanus cave populations and one surface population. We find that, although the metabolome of cavefish bears many similarities with pathological conditions such as metabolic syndrome, cavefish also exhibit features not commonly associated with a pathological condition, and in some cases considered indicative of an overall robust metabolic condition. These include a reduction in cholesteryl esters and intermediates of protein glycation, and an increase in antioxidants and metabolites associated with hypoxia and longevity. This work suggests that certain metabolic features associated with human pathologies are either not intrinsically harmful, or can be counteracted by reciprocal adaptations. We provide a transparent pipeline for reproducing our analysis and a Shiny app for other researchers to explore and visualize our dataset.
Collapse
Affiliation(s)
- J Kyle Medley
- Stowers Institute for Medical Research, Kansas City, United States
| | - Jenna Persons
- Stowers Institute for Medical Research, Kansas City, United States
| | - Tathagata Biswas
- Stowers Institute for Medical Research, Kansas City, United States
| | - Luke Olsen
- Stowers Institute for Medical Research, Kansas City, United States.,Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, United States
| | - Robert Peuß
- Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, United States
| | - Jaya Krishnan
- Stowers Institute for Medical Research, Kansas City, United States
| | - Shaolei Xiong
- Stowers Institute for Medical Research, Kansas City, United States
| | - Nicolas Rohner
- Stowers Institute for Medical Research, Kansas City, United States.,Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, United States
| |
Collapse
|
6
|
Xiong S, Wang W, Kenzior A, Olsen L, Krishnan J, Persons J, Medley K, Peuß R, Wang Y, Chen S, Zhang N, Thomas N, Miles JM, Alvarado AS, Rohner N. Enhanced lipogenesis through Pparγ helps cavefish adapt to food scarcity. Curr Biol 2022; 32:2272-2280.e6. [PMID: 35390280 DOI: 10.1016/j.cub.2022.03.038] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 01/11/2022] [Accepted: 03/11/2022] [Indexed: 12/18/2022]
Abstract
Nutrient availability varies seasonally and spatially in the wild. While many animals, such as hibernating animals or migrating birds, evolved strategies to overcome periods of nutrient scarcity,1,2 the cellular mechanisms of these strategies are poorly understood. Cave environments represent an example of nutrient-deprived environments, since the lack of sunlight and therefore primary energy production drastically diminishes the nutrient availability.3 Here, we used Astyanax mexicanus, which includes river-dwelling surface fish and cave-adapted cavefish populations, to study the genetic adaptation to nutrient limitations.4-9 We show that cavefish populations store large amounts of fat in different body regions when fed ad libitum in the lab. We found higher expression of lipogenesis genes in cavefish livers when fed the same amount of food as surface fish, suggesting an improved ability of cavefish to use lipogenesis to convert available energy into triglycerides for storage into adipose tissue.10-12 Moreover, the lipid metabolism regulator, peroxisome proliferator-activated receptor γ (Pparγ), is upregulated at both transcript and protein levels in cavefish livers. Chromatin immunoprecipitation sequencing (ChIP-seq) showed that Pparγ binds cavefish promoter regions of genes to a higher extent than surface fish and inhibiting Pparγ in vivo decreases fat accumulation in A. mexicanus. Finally, we identified nonsense mutations in per2, a known repressor of Pparγ, providing a possible regulatory mechanism of Pparγ in cavefish. Taken together, our study reveals that upregulated Pparγ promotes higher levels of lipogenesis in the liver and contributes to higher body fat accumulation in cavefish populations, an important adaptation to nutrient-limited environments.
Collapse
Affiliation(s)
- Shaolei Xiong
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA
| | - Wei Wang
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA; Howard Hughes Medical Institute, Kansas City, MO 64110, USA; National Institute of Biological Sciences, Beijing 102206, China
| | | | - Luke Olsen
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA; Department of Molecular & Integrative Physiology, University of Kansas Medical Center, Kansas City, KS 66160, USA
| | - Jaya Krishnan
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA
| | - Jenna Persons
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA
| | - Kyle Medley
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA
| | - Robert Peuß
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA; Institute for Evolution and Biodiversity, University of Münster, Münster 48149, Germany
| | - Yongfu Wang
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA
| | - Shiyuan Chen
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA
| | - Ning Zhang
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA
| | - Nancy Thomas
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA
| | - John M Miles
- Department of Medicine, Division of Metabolism, Endocrinology & Genetics, University of Kansas Medical Center, Kansas City, KS 66160, USA
| | - Alejandro Sánchez Alvarado
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA; Howard Hughes Medical Institute, Kansas City, MO 64110, USA
| | - Nicolas Rohner
- Stowers Institute for Medical Research, Kansas City, MO 64110, USA; Department of Molecular & Integrative Physiology, University of Kansas Medical Center, Kansas City, KS 66160, USA.
| |
Collapse
|
7
|
Accorsi A, Box AC, Peuß R, Wood C, Sánchez Alvarado A, Rohner N. Image3C, a multimodal image-based and label-independent integrative method for single-cell analysis. eLife 2021; 10:65372. [PMID: 34286692 PMCID: PMC8370771 DOI: 10.7554/elife.65372] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Accepted: 07/20/2021] [Indexed: 12/13/2022] Open
Abstract
Image-based cell classification has become a common tool to identify phenotypic changes in cell populations. However, this methodology is limited to organisms possessing well-characterized species-specific reagents (e.g., antibodies) that allow cell identification, clustering, and convolutional neural network (CNN) training. In the absence of such reagents, the power of image-based classification has remained mostly off-limits to many research organisms. We have developed an image-based classification methodology we named Image3C (Image-Cytometry Cell Classification) that does not require species-specific reagents nor pre-existing knowledge about the sample. Image3C combines image-based flow cytometry with an unbiased, high-throughput cell clustering pipeline and CNN integration. Image3C exploits intrinsic cellular features and non-species-specific dyes to perform de novo cell composition analysis and detect changes between different conditions. Therefore, Image3C expands the use of image-based analyses of cell population composition to research organisms in which detailed cellular phenotypes are unknown or for which species-specific reagents are not available.
Collapse
Affiliation(s)
- Alice Accorsi
- Stowers Institute for Medical Research, Kansas City, United States.,Howard Hughes Medical Institute, Stowers Institute for Medical Research, Kansas City, United States
| | - Andrew C Box
- Stowers Institute for Medical Research, Kansas City, United States
| | - Robert Peuß
- Stowers Institute for Medical Research, Kansas City, United States.,Institute for Evolution and Biodiversity, University of Münster, Münster, Germany
| | - Christopher Wood
- Stowers Institute for Medical Research, Kansas City, United States
| | - Alejandro Sánchez Alvarado
- Stowers Institute for Medical Research, Kansas City, United States.,Howard Hughes Medical Institute, Stowers Institute for Medical Research, Kansas City, United States
| | - Nicolas Rohner
- Stowers Institute for Medical Research, Kansas City, United States.,Department of Molecular and Integrative Physiology, KU Medical Center, Kansas City, United States
| |
Collapse
|
8
|
Warren WC, Boggs TE, Borowsky R, Carlson BM, Ferrufino E, Gross JB, Hillier L, Hu Z, Keene AC, Kenzior A, Kowalko JE, Tomlinson C, Kremitzki M, Lemieux ME, Graves-Lindsay T, McGaugh SE, Miller JT, Mommersteeg MTM, Moran RL, Peuß R, Rice ES, Riddle MR, Sifuentes-Romero I, Stanhope BA, Tabin CJ, Thakur S, Yamamoto Y, Rohner N. A chromosome-level genome of Astyanax mexicanus surface fish for comparing population-specific genetic differences contributing to trait evolution. Nat Commun 2021; 12:1447. [PMID: 33664263 PMCID: PMC7933363 DOI: 10.1038/s41467-021-21733-z] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 02/02/2021] [Indexed: 01/31/2023] Open
Abstract
Identifying the genetic factors that underlie complex traits is central to understanding the mechanistic underpinnings of evolution. Cave-dwelling Astyanax mexicanus populations are well adapted to subterranean life and many populations appear to have evolved troglomorphic traits independently, while the surface-dwelling populations can be used as a proxy for the ancestral form. Here we present a high-resolution, chromosome-level surface fish genome, enabling the first genome-wide comparison between surface fish and cavefish populations. Using this resource, we performed quantitative trait locus (QTL) mapping analyses and found new candidate genes for eye loss such as dusp26. We used CRISPR gene editing in A. mexicanus to confirm the essential role of a gene within an eye size QTL, rx3, in eye formation. We also generated the first genome-wide evaluation of deletion variability across cavefish populations to gain insight into this potential source of cave adaptation. The surface fish genome reference now provides a more complete resource for comparative, functional and genetic studies of drastic trait differences within a species.
Collapse
Affiliation(s)
- Wesley C Warren
- Department of Animal Sciences, Institute for Data Science and Informatics, Bond Life Sciences Center, University of Missouri, Columbia, MO, USA.
- Department of Surgery, Institute for Data Science and Informatics, Bond Life Sciences Center, University of Missouri, Columbia, MO, USA.
| | - Tyler E Boggs
- Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, USA
| | | | - Brian M Carlson
- Department of Biological Sciences, Northern Kentucky University, Highland Heights, KY, USA
| | - Estephany Ferrufino
- Harriet L. Wilkes Honors College, Florida Atlantic University, Jupiter, FL, USA
| | - Joshua B Gross
- Department of Biological Sciences, University of Cincinnati, Cincinnati, OH, USA
| | - LaDeana Hillier
- Department of Genome Sciences, University of Washington, Seattle, WA, USA
| | - Zhilian Hu
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford, UK
| | - Alex C Keene
- Department of Biological Sciences, Florida Atlantic University, Jupiter, FL, USA
| | | | - Johanna E Kowalko
- Harriet L. Wilkes Honors College, Florida Atlantic University, Jupiter, FL, USA
| | - Chad Tomlinson
- McDonnell Genome Institute, Washington University, St Louis, MO, USA
| | - Milinn Kremitzki
- McDonnell Genome Institute, Washington University, St Louis, MO, USA
| | | | | | - Suzanne E McGaugh
- Department of Ecology, Evolution, and Behavior, University of Minnesota, Saint Paul, MN, USA
| | - Jeffrey T Miller
- Department of Ecology, Evolution, and Behavior, University of Minnesota, Saint Paul, MN, USA
| | | | - Rachel L Moran
- Department of Ecology, Evolution, and Behavior, University of Minnesota, Saint Paul, MN, USA
| | - Robert Peuß
- Stowers Institute for Medical Research, Kansas City, MO, USA
- Institute for Evolution and Biodiversity, University of Münster, Münster, Germany
| | - Edward S Rice
- Bond Life Sciences Center, University of Missouri, Columbia, MO, USA
| | - Misty R Riddle
- Genetics Department, Blavatnik Institute, Harvard Medical School, Boston, MA, USA
- Department of Biology, University of Nevada, Reno, NV, USA
| | | | - Bethany A Stanhope
- Harriet L. Wilkes Honors College, Florida Atlantic University, Jupiter, FL, USA
- Department of Biological Sciences, Florida Atlantic University, Jupiter, FL, USA
| | - Clifford J Tabin
- Genetics Department, Blavatnik Institute, Harvard Medical School, Boston, MA, USA
| | - Sunishka Thakur
- Harriet L. Wilkes Honors College, Florida Atlantic University, Jupiter, FL, USA
| | - Yoshiyuki Yamamoto
- Department of Cell and Developmental Biology, University College London, London, UK
| | - Nicolas Rohner
- Stowers Institute for Medical Research, Kansas City, MO, USA.
- Department of Molecular & Integrative Physiology, KU Medical Center, Kansas City, KS, USA.
| |
Collapse
|
9
|
Riddle MR, Aspiras AC, Gaudenz K, Peuß R, Sung JY, Martineau B, Peavey M, Box AC, Tabin JA, McGaugh S, Borowsky R, Tabin CJ, Rohner N. Author Correction: Insulin resistance in cavefish as an adaptation to a nutrient-limited environment. Nature 2020; 588:E1. [PMID: 33188369 DOI: 10.1038/s41586-020-2953-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Collapse
Affiliation(s)
- Misty R Riddle
- Department of Genetics, Harvard Medical School, Boston, Massachusetts, 02115, USA
| | - Ariel C Aspiras
- Department of Genetics, Harvard Medical School, Boston, Massachusetts, 02115, USA
| | - Karin Gaudenz
- Stowers Institute for Medical Research, Kansas City, Missouri, 64110, USA
| | - Robert Peuß
- Stowers Institute for Medical Research, Kansas City, Missouri, 64110, USA
| | - Jenny Y Sung
- Stowers Institute for Medical Research, Kansas City, Missouri, 64110, USA
| | - Brian Martineau
- Department of Genetics, Harvard Medical School, Boston, Massachusetts, 02115, USA
| | - Megan Peavey
- Department of Genetics, Harvard Medical School, Boston, Massachusetts, 02115, USA
| | - Andrew C Box
- Stowers Institute for Medical Research, Kansas City, Missouri, 64110, USA
| | - Julius A Tabin
- Department of Genetics, Harvard Medical School, Boston, Massachusetts, 02115, USA
| | - Suzanne McGaugh
- College of Biomedical Sciences, University of Minnesota, St. Paul, Minnesota, 55108, USA
| | - Richard Borowsky
- Department of Biology, New York University, New York, New York, 10003, USA
| | - Clifford J Tabin
- Department of Genetics, Harvard Medical School, Boston, Massachusetts, 02115, USA.
| | - Nicolas Rohner
- Stowers Institute for Medical Research, Kansas City, Missouri, 64110, USA.,Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, Kansas, 66160, USA
| |
Collapse
|
10
|
Peuß R, Box AC, Chen S, Wang Y, Tsuchiya D, Persons JL, Kenzior A, Maldonado E, Krishnan J, Scharsack JP, Slaughter BD, Rohner N. Adaptation to low parasite abundance affects immune investment and immunopathological responses of cavefish. Nat Ecol Evol 2020; 4:1416-1430. [PMID: 32690906 PMCID: PMC11062081 DOI: 10.1038/s41559-020-1234-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 05/22/2020] [Indexed: 02/07/2023]
Abstract
Reduced parasitic infection rates in the developed world are suspected to underlie the rising prevalence of autoimmune disorders. However, the long-term evolutionary consequences of decreased parasite exposure on an immune system are not well understood. We used the Mexican tetra Astyanax mexicanus to understand how loss of parasite diversity influences the evolutionary trajectory of the vertebrate immune system, by comparing river with cave morphotypes. Here, we present field data affirming a strong reduction in parasite diversity in the cave ecosystem, and show that cavefish immune cells display a more sensitive pro-inflammatory response towards bacterial endotoxins. Surprisingly, other innate cellular immune responses, such as phagocytosis, are drastically decreased in cavefish. Using two independent single-cell approaches, we identified a shift in the overall immune cell composition in cavefish as the underlying cellular mechanism, indicating strong differences in the immune investment strategy. While surface fish invest evenly into the innate and adaptive immune systems, cavefish shifted immune investment to the adaptive immune system, and here, mainly towards specific T-cell populations that promote homeostasis. Additionally, inflammatory responses and immunopathological phenotypes in visceral adipose tissue are drastically reduced in cavefish. Our data indicate that long-term adaptation to low parasite diversity coincides with a more sensitive immune system in cavefish, which is accompanied by a reduction in the immune cells that play a role in mediating the pro-inflammatory response.
Collapse
Affiliation(s)
- Robert Peuß
- Stowers Institute for Medical Research, Kansas City, MO, USA.
| | - Andrew C Box
- Stowers Institute for Medical Research, Kansas City, MO, USA
| | - Shiyuan Chen
- Stowers Institute for Medical Research, Kansas City, MO, USA
| | - Yongfu Wang
- Stowers Institute for Medical Research, Kansas City, MO, USA
| | - Dai Tsuchiya
- Stowers Institute for Medical Research, Kansas City, MO, USA
| | - Jenna L Persons
- Stowers Institute for Medical Research, Kansas City, MO, USA
| | | | - Ernesto Maldonado
- EvoDevo Research Group, Unidad Académica de Sistemas Arrecifales, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Puerto Morelos, Mexico
| | - Jaya Krishnan
- Stowers Institute for Medical Research, Kansas City, MO, USA
| | - Jörn P Scharsack
- Institute for Evolution and Biodiversity, University of Münster, Münster, Germany
- Thünen Institute of Fisheries Ecology, Bremerhaven, Germany
| | | | - Nicolas Rohner
- Stowers Institute for Medical Research, Kansas City, MO, USA.
- Department of Molecular & Integrative Physiology, University of Kansas Medical Center, Kansas City, KS, USA.
| |
Collapse
|
11
|
Krishnan J, Persons JL, Peuß R, Hassan H, Kenzior A, Xiong S, Olsen L, Maldonado E, Kowalko JE, Rohner N. Comparative transcriptome analysis of wild and lab populations of
Astyanax mexicanus
uncovers differential effects of environment and morphotype on gene expression. J Exp Zool (Mol Dev Evol) 2020; 334:530-539. [DOI: 10.1002/jez.b.22933] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 01/16/2020] [Accepted: 01/24/2020] [Indexed: 01/25/2023]
Affiliation(s)
- Jaya Krishnan
- Stowers Institute for Medical Research Kansas City Missouri
| | | | - Robert Peuß
- Stowers Institute for Medical Research Kansas City Missouri
| | - Huzaifa Hassan
- Stowers Institute for Medical Research Kansas City Missouri
| | | | - Shaolei Xiong
- Stowers Institute for Medical Research Kansas City Missouri
| | - Luke Olsen
- Stowers Institute for Medical Research Kansas City Missouri
- Department of Molecular and Integrative Physiology The University of Kansas Medical Center Kansas City Kansas
| | - Ernesto Maldonado
- EvoDevo Research Group, Unidad Académica de Sistemas Arrecifales, Instituto de Ciencias del Mar y Limnología Universidad Nacional Autónoma de México Puerto Morelos Quintana Roo Mexico
| | - Johanna E. Kowalko
- Harriet L. Wilkes Honors College Florida Atlantic University Jupiter Florida
| | - Nicolas Rohner
- Stowers Institute for Medical Research Kansas City Missouri
- Department of Molecular and Integrative Physiology The University of Kansas Medical Center Kansas City Kansas
| |
Collapse
|
12
|
Abstract
Memory and specificity are hallmarks of the adaptive immune system. Contrary to prior belief, innate immune systems can also provide forms of immune memory, such as immune priming in invertebrates and trained immunity in vertebrates. Immune priming can even be specific but differs remarkably in cellular and molecular functionality from the well-studied adaptive immune system of vertebrates. To date, it is unknown whether and how the level of specificity in immune priming can adapt during evolution in response to natural selection. We tested the evolution of priming specificity in an invertebrate model, the beetle Tribolium castaneum Using controlled evolution experiments, we selected beetles for either specific or unspecific immune priming toward the bacteria Pseudomonas fluorescens, Lactococcus lactis, and 4 strains of the entomopathogen Bacillus thuringiensis After 14 generations of host selection, specificity of priming was not universally higher in the lines selected for specificity, but rather depended on the bacterium used for priming and challenge. The insect pathogen B. thuringiensis induced the strongest priming effect. Differences between the evolved populations were mirrored in the transcriptomic response, revealing involvement of immune, metabolic, and transcription-modifying genes. Finally, we demonstrate that the induction strength of a set of differentially expressed immune genes predicts the survival probability of the evolved lines upon infection. We conclude that high specificity of immune priming can evolve rapidly for certain bacteria, most likely due to changes in the regulation of immune genes.
Collapse
Affiliation(s)
- Kevin Ferro
- Institute for Evolution and Biodiversity, University of Münster, 48149 Münster, Germany
- Department of Entomology, University of Arizona, Tucson, AZ 85704
| | - Robert Peuß
- Institute for Evolution and Biodiversity, University of Münster, 48149 Münster, Germany
- Stowers Institute for Medical Research, Kansas City, MO 64110
| | - Wentao Yang
- Zoological Institute, Kiel University, 24118 Kiel, Germany
| | - Philip Rosenstiel
- Institute of Clinical Molecular Biology, Kiel University, 24105 Kiel, Germany
| | - Hinrich Schulenburg
- Zoological Institute, Kiel University, 24118 Kiel, Germany
- Max Planck Institute for Evolutionary Biology, 24306 Plön, Germany
| | - Joachim Kurtz
- Institute for Evolution and Biodiversity, University of Münster, 48149 Münster, Germany;
| |
Collapse
|
13
|
Loomis C, Peuß R, Jaggard JB, Wang Y, McKinney SA, Raftopoulos SC, Raftopoulos A, Whu D, Green M, McGaugh SE, Rohner N, Keene AC, Duboue ER. An Adult Brain Atlas Reveals Broad Neuroanatomical Changes in Independently Evolved Populations of Mexican Cavefish. Front Neuroanat 2019; 13:88. [PMID: 31636546 PMCID: PMC6788135 DOI: 10.3389/fnana.2019.00088] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 09/11/2019] [Indexed: 01/08/2023] Open
Abstract
A shift in environmental conditions impacts the evolution of complex developmental and behavioral traits. The Mexican cavefish, Astyanax mexicanus, is a powerful model for examining the evolution of development, physiology, and behavior because multiple cavefish populations can be compared to an extant, ancestral-like surface population of the same species. Many behaviors have diverged in cave populations of A. mexicanus, and previous studies have shown that cavefish have a loss of sleep, reduced stress, an absence of social behaviors, and hyperphagia. Despite these findings, surprisingly little is known about the changes in neuroanatomy that underlie these behavioral phenotypes. Here, we use serial sectioning to generate brain atlases of surface fish and three independent cavefish populations. Volumetric reconstruction of serial-sectioned brains confirms convergent evolution on reduced optic tectum volume in all cavefish populations tested. In addition, we quantified volumes of specific neuroanatomical loci within several brain regions that have previously been implicated in behavioral regulation, including the hypothalamus, thalamus, and habenula. These analyses reveal an enlargement of the hypothalamus in all cavefish populations relative to surface fish, as well as subnuclei-specific differences within the thalamus and prethalamus. Taken together, these analyses support the notion that changes in environmental conditions are accompanied by neuroanatomical changes in brain structures associated with behavior. This atlas provides a resource for comparative neuroanatomy of additional brain regions and the opportunity to associate brain anatomy with evolved changes in behavior.
Collapse
Affiliation(s)
- Cody Loomis
- Department of Biology, Charles E. Schmidt College of Science, Florida Atlantic University, Jupiter, FL, United States
- Jupiter Life Science Initiative, Florida Atlantic University, Jupiter, FL, United States
| | - Robert Peuß
- Stowers Institute for Medical Research, Kansas City, MO, United States
| | - James B. Jaggard
- Department of Biology, Charles E. Schmidt College of Science, Florida Atlantic University, Jupiter, FL, United States
- Jupiter Life Science Initiative, Florida Atlantic University, Jupiter, FL, United States
| | - Yongfu Wang
- Stowers Institute for Medical Research, Kansas City, MO, United States
| | - Sean A. McKinney
- Stowers Institute for Medical Research, Kansas City, MO, United States
| | - Stephan C. Raftopoulos
- Harriet L. Wilkes Honors College, Florida Atlantic University, Jupiter, FL, United States
| | - Austin Raftopoulos
- Harriet L. Wilkes Honors College, Florida Atlantic University, Jupiter, FL, United States
| | - Daniel Whu
- Harriet L. Wilkes Honors College, Florida Atlantic University, Jupiter, FL, United States
| | - Matthew Green
- Jupiter Life Science Initiative, Florida Atlantic University, Jupiter, FL, United States
| | - Suzanne E. McGaugh
- Department of Ecology, University of Minnesota, St. Paul, MN, United States
| | - Nicolas Rohner
- Stowers Institute for Medical Research, Kansas City, MO, United States
- Department of Molecular and Integrative Physiology, KU Medical Center, Kansas City, KS, United States
| | - Alex C. Keene
- Department of Biology, Charles E. Schmidt College of Science, Florida Atlantic University, Jupiter, FL, United States
- Jupiter Life Science Initiative, Florida Atlantic University, Jupiter, FL, United States
| | - Erik R. Duboue
- Jupiter Life Science Initiative, Florida Atlantic University, Jupiter, FL, United States
- Harriet L. Wilkes Honors College, Florida Atlantic University, Jupiter, FL, United States
| |
Collapse
|
14
|
Peuß R, Zakibe Z, Krishnan J, Merryman MS, Baumann DP, Rohner N. Gamete Collection and In Vitro Fertilization of Astyanax mexicanus. J Vis Exp 2019. [DOI: 10.3791/59334] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
|
15
|
Stahl BA, Peuß R, McDole B, Kenzior A, Jaggard JB, Gaudenz K, Krishnan J, McGaugh SE, Duboue ER, Keene AC, Rohner N. Stable transgenesis in Astyanax mexicanus using the Tol2 transposase system. Dev Dyn 2019; 248:679-687. [PMID: 30938001 DOI: 10.1002/dvdy.32] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 03/08/2019] [Accepted: 03/31/2019] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Astyanax mexicanus is a well-established fish model system for evolutionary and developmental biology research. These fish exist as surface forms that inhabit rivers and 30 different populations of cavefish. Despite important progress in the deployment of new technologies, deep mechanistic insights into the genetic basis of evolution, development, and behavior have been limited by a lack of transgenic lines commonly used in genetic model systems. RESULTS Here, we expand the toolkit of transgenesis by characterizing two novel stable transgenic lines that were generated using the highly efficient Tol2 system, commonly used to generate transgenic zebrafish. A stable transgenic line consisting of the zebrafish ubiquitin promoter expresses enhanced green fluorescent protein ubiquitously throughout development in a surface population of Astyanax. To define specific cell-types, a Cntnap2-mCherry construct labels lateral line mechanosensory neurons in zebrafish. Strikingly, both constructs appear to label the predicted cell types, suggesting many genetic tools and defined promoter regions in zebrafish are directly transferrable to cavefish. CONCLUSION The lines provide proof-of-principle for the application of Tol2 transgenic technology in A. mexicanus. Expansion on these initial transgenic lines will provide a platform to address broadly important problems in the quest to bridge the genotype-phenotype gap.
Collapse
Affiliation(s)
- Bethany A Stahl
- Department of Biological Sciences, Florida Atlantic University, Florida.,Jupiter Life Science Initiative, Florida Atlantic University, Florida
| | - Robert Peuß
- Stowers Institute for Medical Research, Kansas City, Missouri
| | - Brittnee McDole
- Department of Biological Sciences, Florida Atlantic University, Florida.,Jupiter Life Science Initiative, Florida Atlantic University, Florida
| | | | - James B Jaggard
- Department of Biological Sciences, Florida Atlantic University, Florida.,Jupiter Life Science Initiative, Florida Atlantic University, Florida
| | - Karin Gaudenz
- Stowers Institute for Medical Research, Kansas City, Missouri
| | - Jaya Krishnan
- Stowers Institute for Medical Research, Kansas City, Missouri
| | - Suzanne E McGaugh
- Department of Ecology, Evolution, and Behavior, University of Minnesota, St. Paul, Minnesota
| | - Erik R Duboue
- Jupiter Life Science Initiative, Florida Atlantic University, Florida.,Wilkes Honors College, Florida Atlantic University, Jupiter, Florida
| | - Alex C Keene
- Department of Biological Sciences, Florida Atlantic University, Florida.,Jupiter Life Science Initiative, Florida Atlantic University, Florida
| | - Nicolas Rohner
- Stowers Institute for Medical Research, Kansas City, Missouri.,Department of Molecular and Integrative Physiology, KU Medical Center, Kansas City, Kansas
| |
Collapse
|
16
|
Xiong S, Krishnan J, Peuß R, Rohner N. Early adipogenesis contributes to excess fat accumulation in cave populations of Astyanax mexicanus. Dev Biol 2018; 441:297-304. [DOI: 10.1016/j.ydbio.2018.06.003] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 05/11/2018] [Accepted: 06/04/2018] [Indexed: 01/23/2023]
|
17
|
Greenwood JM, Milutinović B, Peuß R, Behrens S, Esser D, Rosenstiel P, Schulenburg H, Kurtz J. Oral immune priming with Bacillus thuringiensis induces a shift in the gene expression of Tribolium castaneum larvae. BMC Genomics 2017; 18:329. [PMID: 28446171 PMCID: PMC5405463 DOI: 10.1186/s12864-017-3705-7] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Accepted: 04/12/2017] [Indexed: 12/22/2022] Open
Abstract
Background The phenomenon of immune priming, i.e. enhanced protection following a secondary exposure to a pathogen, has now been demonstrated in a wide range of invertebrate species. Despite accumulating phenotypic evidence, knowledge of its mechanistic underpinnings is currently very limited. Here we used the system of the red flour beetle, Tribolium castaneum and the insect pathogen Bacillus thuringiensis (Bt) to further our molecular understanding of the oral immune priming phenomenon. We addressed how ingestion of bacterial cues (derived from spore supernatants) of an orally pathogenic and non-pathogenic Bt strain affects gene expression upon later challenge exposure, using a whole-transcriptome sequencing approach. Results Whereas gene expression of individuals primed with the orally non-pathogenic strain showed minor changes to controls, we found that priming with the pathogenic strain induced regulation of a large set of distinct genes, many of which are known immune candidates. Intriguingly, the immune repertoire activated upon priming and subsequent challenge qualitatively differed from the one mounted upon infection with Bt without previous priming. Moreover, a large subset of priming-specific genes showed an inverse regulation compared to their regulation upon challenge only. Conclusions Our data demonstrate that gene expression upon infection is strongly affected by previous immune priming. We hypothesise that this shift in gene expression indicates activation of a more targeted and efficient response towards a previously encountered pathogen, in anticipation of potential secondary encounter. Electronic supplementary material The online version of this article (doi:10.1186/s12864-017-3705-7) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Jenny M Greenwood
- Institute for Evolution and Biodiversity, University of Münster, Hüfferstrasse 1, 48149, Münster, Germany
| | - Barbara Milutinović
- Institute for Evolution and Biodiversity, University of Münster, Hüfferstrasse 1, 48149, Münster, Germany.,Institute of Science and Technology Austria, Am Campus 1, 3400, Klosterneuburg, Austria
| | - Robert Peuß
- Institute for Evolution and Biodiversity, University of Münster, Hüfferstrasse 1, 48149, Münster, Germany.,Current Address: Stowers Institute for Medical Research, 1000 East 50th Street, Kansas City, MO, 64110, USA
| | - Sarah Behrens
- Institute for Evolution and Biodiversity, University of Münster, Hüfferstrasse 1, 48149, Münster, Germany
| | - Daniela Esser
- Institute of Clinical Molecular Biology, Christian-Albrechts University Kiel, Schittenhelmstr. 12, 24105, Kiel, Germany
| | - Philip Rosenstiel
- Institute of Clinical Molecular Biology, Christian-Albrechts University Kiel, Schittenhelmstr. 12, 24105, Kiel, Germany
| | - Hinrich Schulenburg
- Zoological Institute, Christian-Albrechts University Kiel, Am Botanischen Garten 1-9, 24118, Kiel, Germany
| | - Joachim Kurtz
- Institute for Evolution and Biodiversity, University of Münster, Hüfferstrasse 1, 48149, Münster, Germany.
| |
Collapse
|
18
|
Peuß R, Wensing KU, Woestmann L, Eggert H, Milutinović B, Sroka MGU, Scharsack JP, Kurtz J, Armitage SAO. Down syndrome cell adhesion molecule 1: testing for a role in insect immunity, behaviour and reproduction. R Soc Open Sci 2016; 3:160138. [PMID: 27152227 PMCID: PMC4852650 DOI: 10.1098/rsos.160138] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 03/22/2016] [Indexed: 05/24/2023]
Abstract
Down syndrome cell adhesion molecule 1 (Dscam1) has wide-reaching and vital neuronal functions although the role it plays in insect and crustacean immunity is less well understood. In this study, we combine different approaches to understand the roles that Dscam1 plays in fitness-related contexts in two model insect species. Contrary to our expectations, we found no short-term modulation of Dscam1 gene expression after haemocoelic or oral bacterial exposure in Tribolium castaneum, or after haemocoelic bacterial exposure in Drosophila melanogaster. Furthermore, RNAi-mediated Dscam1 knockdown and subsequent bacterial exposure did not reduce T. castaneum survival. However, Dscam1 knockdown in larvae resulted in adult locomotion defects, as well as dramatically reduced fecundity in males and females. We suggest that Dscam1 does not always play a straightforward role in immunity, but strongly influences behaviour and fecundity. This study takes a step towards understanding more about the role of this intriguing gene from different phenotypic perspectives.
Collapse
|
19
|
Peuß R, Eggert H, Armitage SAO, Kurtz J. Downregulation of the evolutionary capacitor Hsp90 is mediated by social cues. Proc Biol Sci 2015; 282:20152041. [PMID: 26582024 PMCID: PMC4685818 DOI: 10.1098/rspb.2015.2041] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 10/16/2015] [Indexed: 01/16/2023] Open
Abstract
The relationship between robustness and evolvability is a long-standing question in evolution. Heat shock protein 90 (HSP90), a molecular chaperone, has been identified as a potential capacitor for evolution, since it allows for the accumulation and release of cryptic genetic variation, and also for the regulation of novel genetic variation through transposon activity. However, to date, it is unknown whether Hsp90 expression is regulated upon demand (i.e. when the release of cryptic genetic variation is most needed). Here, we show that Hsp90 has reduced transcription under conditions where the mobilization of genetic variation could be advantageous. We designed a situation that indicates a stressful environment but avoids the direct effects of stress, by placing untreated (focal) red flour beetles, Tribolium castaneum, into groups together with wounded conspecifics, and found a consistent reduction in expression of two Hsp90 genes (Hsp83 and Hsp90) in focal beetles. We moreover observed a social transfer of immunity in this non-eusocial insect: there was increased activity of the phenoloxidase enzyme and downregulation of the immune regulator, imd. Our study poses the exciting question of whether evolvability might be regulated through the use of information derived from the social environment.
Collapse
Affiliation(s)
- Robert Peuß
- Institute for Evolution and Biodiversity, University of Münster, Hüfferstrasse 1, Münster 48149, Germany
| | - Hendrik Eggert
- Institute for Evolution and Biodiversity, University of Münster, Hüfferstrasse 1, Münster 48149, Germany
| | - Sophie A O Armitage
- Institute for Evolution and Biodiversity, University of Münster, Hüfferstrasse 1, Münster 48149, Germany
| | - Joachim Kurtz
- Institute for Evolution and Biodiversity, University of Münster, Hüfferstrasse 1, Münster 48149, Germany
| |
Collapse
|
20
|
Behrens S, Peuß R, Milutinović B, Eggert H, Esser D, Rosenstiel P, Schulenburg H, Bornberg-Bauer E, Kurtz J. Infection routes matter in population-specific responses of the red flour beetle to the entomopathogen Bacillus thuringiensis. BMC Genomics 2014; 15:445. [PMID: 24908078 PMCID: PMC4079954 DOI: 10.1186/1471-2164-15-445] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 06/04/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Pathogens can infect their hosts through different routes. For studying the consequences for host resistance, we here used the entomopathogen Bacillus thuringiensis and the red flour beetle Tribolium castaneum for oral and systemic (i. e. pricking the cuticle) experimental infection. In order to characterize the molecular mechanisms underpinning the two different infection routes, the transcriptomes of beetles of two different T. castaneum populations--one recently collected population (Cro1) and a commonly used laboratory strain (SB)--were analyzed using a next generation RNA sequencing approach. RESULTS The genetically more diverse population Cro1 showed a significantly larger number of differentially expressed genes. While both populations exhibited similar reactions to pricking, their expression patterns in response to oral infection differed remarkably. In particular, the Cro1 population showed a strong response of cuticular proteins and developmental genes, which might indicate an adaptive developmental flexibility that was lost in the SB population presumably as a result of inbreeding. The immune response of SB was primarily based on antimicrobial peptides, while Cro1 relied on responses mediated by phenoloxidase and reactive oxygen species, which may explain the higher resistance of this strain against oral infection. CONCLUSIONS Our data demonstrate that immunological and physiological processes underpinning the two different routes of infection are clearly distinct, and that host populations particularly differ in responses to oral infection. Furthermore, gene expression upon pricking infection entailed a strong signal of wounding, highlighting the importance of pricking controls in future infection studies.
Collapse
Affiliation(s)
- Sarah Behrens
- />Institute for Evolution and Biodiversity, University of Münster, Hüfferstr. 1, 48149 Münster, Germany
| | - Robert Peuß
- />Institute for Evolution and Biodiversity, University of Münster, Hüfferstr. 1, 48149 Münster, Germany
| | - Barbara Milutinović
- />Institute for Evolution and Biodiversity, University of Münster, Hüfferstr. 1, 48149 Münster, Germany
| | - Hendrik Eggert
- />Institute for Evolution and Biodiversity, University of Münster, Hüfferstr. 1, 48149 Münster, Germany
| | - Daniela Esser
- />Institute of Clinical Molecular Biology, Christian-Albrechts University Kiel, Schittenhelmstr. 12, 24105 Kiel, Germany
| | - Philip Rosenstiel
- />Institute of Clinical Molecular Biology, Christian-Albrechts University Kiel, Schittenhelmstr. 12, 24105 Kiel, Germany
| | - Hinrich Schulenburg
- />Zoological Institute, Christian-Albrechts University Kiel, Am Botanischen Garten 1-9, 24118 Kiel, Germany
| | - Erich Bornberg-Bauer
- />Institute for Evolution and Biodiversity, University of Münster, Hüfferstr. 1, 48149 Münster, Germany
| | - Joachim Kurtz
- />Institute for Evolution and Biodiversity, University of Münster, Hüfferstr. 1, 48149 Münster, Germany
| |
Collapse
|