1
|
Twort VG, Laine VN, Field KA, Whiting-Fawcett F, Ito F, Reiman M, Bartonicka T, Fritze M, Ilyukha VA, Belkin VV, Khizhkin EA, Reeder DM, Fukui D, Jiang TL, Lilley TM. Signals of positive selection in genomes of palearctic Myotis-bats coexisting with a fungal pathogen. BMC Genomics 2024; 25:828. [PMID: 39227786 PMCID: PMC11370307 DOI: 10.1186/s12864-024-10722-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 08/19/2024] [Indexed: 09/05/2024] Open
Abstract
Disease can act as a driving force in shaping genetic makeup across populations, even species, if the impacts influence a particularly sensitive part of their life cycles. White-nose disease is caused by a fungal pathogen infecting bats during hibernation. The mycosis has caused massive population declines of susceptible species in North America, particularly in the genus Myotis. However, Myotis bats appear to tolerate infection in Eurasia, where the fungal pathogen has co-evolved with its bat hosts for an extended period of time. Therefore, with susceptible and tolerant populations, the fungal disease provides a unique opportunity to tease apart factors contributing to tolerance at a genomic level to and gain an understanding of the evolution of non-harmful in host-parasite interactions. To investigate if the fungal disease has caused adaptation on a genomic level in Eurasian bat species, we adopted both whole-genome sequencing approaches and a literature search to compile a set of 300 genes from which to investigate signals of positive selection in genomes of 11 Eurasian bats at the codon-level. Our results indicate significant positive selection in 38 genes, many of which have a marked role in responses to infection. Our findings suggest that white-nose syndrome may have applied a significant selective pressure on Eurasian Myotis-bats in the past, which can contribute their survival in co-existence with the pathogen. Our findings provide an insight on the selective pressure pathogens afflict on their hosts using methodology that can be adapted to other host-pathogen study systems.
Collapse
Affiliation(s)
- V G Twort
- Finnish Museum of Natural History, BatLab Finland, University of Helsinki, Helsinki, Finland
| | - V N Laine
- Finnish Museum of Natural History, BatLab Finland, University of Helsinki, Helsinki, Finland
| | - K A Field
- Department of Biology, Bucknell University, Lewisburg, PA, USA
| | - F Whiting-Fawcett
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
| | - F Ito
- Finnish Museum of Natural History, BatLab Finland, University of Helsinki, Helsinki, Finland
| | - M Reiman
- Finnish Museum of Natural History, BatLab Finland, University of Helsinki, Helsinki, Finland
| | - T Bartonicka
- Dept. Botany and Zoology, Faculty of Science, Masaryk University, Kotlarska 2, Brno, 611 37, Czech Republic
| | - M Fritze
- Zoological Institute and Museum, University of Greifswald, Greifswald, Germany
- German Bat Observatory, Berlin, Germany
- Competence Center for Bat Conservation Saxony Anhalt, in the South Harz Karst Landscape Biosphere Reserve, Südharz, Germany
| | - V A Ilyukha
- Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences, Borok, Russia
| | - V V Belkin
- Institute of Biology, Karelian Research Centre, Russian Academy of Sciences, Petrozavodsk, Russia
| | - E A Khizhkin
- Institute of Biology, Karelian Research Centre, Russian Academy of Sciences, Petrozavodsk, Russia
| | - D M Reeder
- Department of Biology, Bucknell University, Lewisburg, PA, USA
| | - D Fukui
- Graduate School of Agricultural and Life Sciences, The University of Tokyo Fuji Iyashinomori Woodland Study Center, The University of Tokyo, Yamanakako, Japan
| | - T L Jiang
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China
| | - T M Lilley
- Finnish Museum of Natural History, BatLab Finland, University of Helsinki, Helsinki, Finland.
| |
Collapse
|
2
|
Pannkuk EL, Moore MS, Bansal S, Kumar K, Suman S, Howell D, Kath JA, Kurta A, Reeder DM, Field KA. White adipose tissue remodeling in Little Brown Myotis (Myotis lucifugus) with white-nose syndrome. Metabolomics 2024; 20:100. [PMID: 39190217 DOI: 10.1007/s11306-024-02165-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Accepted: 08/19/2024] [Indexed: 08/28/2024]
Abstract
White-nose syndrome (WNS) is a fungal wildlife disease of bats that has caused precipitous declines in certain Nearctic bat species. A key driver of mortality is premature exhaustion of fat reserves, primarily white adipose tissue (WAT), that bats rely on to meet their metabolic needs during winter. However, the pathophysiological and metabolic effects of WNS have remained ill-defined. To elucidate metabolic mechanisms associated with WNS mortality, we infected a WNS susceptible species, the Little Brown Myotis (Myotis lucifugus), with Pseudogymnoascus destructans (Pd) and collected WAT biopsies for histology and targeted lipidomics. These results were compared to the WNS-resistant Big Brown Bat (Eptesicus fuscus). A similar distribution in broad lipid class was observed in both species, with total WAT primarily consisting of triacylglycerides. Baseline differences in WAT chemical composition between species showed that higher glycerophospholipids (GPs) levels in E. fuscus were dominated by unsaturated or monounsaturated moieties and n-6 (18:2, 20:2, 20:3, 20:4) fatty acids. Conversely, higher GP levels in M. lucifugus WAT were primarily compounds containing n-3 (20:5 and 22:5) fatty acids. Following Pd-infection, we found that perturbation to WAT reserves occurs in M. lucifugus, but not in the resistant E. fuscus. A total of 66 GPs (primarily glycerophosphocholines and glycerophosphoethanolamines) were higher in Pd-infected M. lucifugus, indicating perturbation to the WAT structural component. In addition to changes in lipid chemistry, smaller adipocyte sizes and increased extracellular matrix deposition was observed in Pd-infected M. lucifugus. This is the first study to describe WAT GP composition of bats with different susceptibilities to WNS and highlights that recovery from WNS may require repair from adipose remodeling in addition to replenishing depot fat during spring emergence.
Collapse
Affiliation(s)
- Evan L Pannkuk
- Department of Biochemistry and Molecular & Cellular Biology, Georgetown University Medical Center, 3970 Reservoir Road, NW, New Research Building, Room E504, Washington, DC, 20057, USA.
- Center for Metabolomic Studies, Georgetown University, Washington, DC, USA.
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA.
| | - Marianne S Moore
- Department of Biological Sciences, University of the Virgin Islands, St. Thomas, USA
| | - Shivani Bansal
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA
| | - Kamendra Kumar
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA
| | - Shubhankar Suman
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA
| | - Daryl Howell
- Iowa Department of Natural Resources, Des Moines, IA, USA
| | - Joseph A Kath
- Illinois Department of Natural Resources, Springfield, IL, USA
| | - Allen Kurta
- Department of Biology, Eastern Michigan University, Ypsilanti, MI, USA
| | - DeeAnn M Reeder
- Department of Biology, Bucknell University, Lewisburg, PA, USA
| | - Kenneth A Field
- Department of Biology, Bucknell University, Lewisburg, PA, USA
| |
Collapse
|
3
|
Lu Y, Ren H, Li Z, Leng H, Li A, Dai W, Huang L, Feng J, Sun K. Microbiota diversity and anti- Pseudogymnoascus destructans bacteria isolated from Myotis pilosus skin during late hibernation. Appl Environ Microbiol 2024; 90:e0069324. [PMID: 39058040 PMCID: PMC11337810 DOI: 10.1128/aem.00693-24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Accepted: 07/04/2024] [Indexed: 07/28/2024] Open
Abstract
Symbiotic microorganisms that reside on the host skin serve as the primary defense against pathogens in vertebrates. Specifically, the skin microbiome of bats may play a crucial role in providing resistance against Pseudogymnoascus destructans (Pd), the pathogen causing white-nose syndrome. However, the epidermis symbiotic microbiome and its specific role in resisting Pd in highly resistant bats in Asia are still not well understood. In this study, we collected and characterized skin microbiota samples of 19 Myotis pilosus in China and explored the differences between Pd-positive and negative individuals. We identified inhibitory effects of these bacteria through cultivation methods. Our results revealed that the Simpson diversity index of the skin microbiota for positive individuals was significantly lower than that of negative individuals, and the relative abundance of Pseudomonas was significantly higher in positive bats. Regardless of whether individuals were positive or negative for Pd, the relative abundance of potentially antifungal genera in skin microbiota was high. Moreover, we successfully isolated 165 microbes from bat skin and 41 isolates from positive individuals able to inhibit Pd growth compared to only 12 isolates from negative individuals. A total of 10 genera of Pd-inhibiting bacteria were screened, among which the genera Algoriella, Glutamicibacter, and Psychrobacter were newly discovered as Pd-inhibiting genera. These Pd-inhibiting bacteria metabolized a variety of volatile compounds, including dimethyl trisulfide, dimethyl disulfide, propylene sulfide, 2-undecanone, and 2-nonanone, which were able to completely inhibit Pd growth at low concentrations.IMPORTANCERecently, white-nose syndrome has caused the deaths of millions of hibernating bats, even threatening some with regional extinction. Bats in China with high resistance to Pseudogymnoascus destructans can provide a powerful reference for studying the management of white-nose syndrome and understanding the bats against the pathogen's intrinsic mechanisms. This study sheds light on the crucial role of host symbiotic skin microorganisms in resistance to pathogenic fungi and highlights the potential for harnessing natural defense mechanisms for the prevention and treatment of white-nose syndrome. In addition, this may also provide promising candidates for the development of bioinsecticides and fungicides that offer new avenues for addressing fungal diseases in wildlife and agricultural environments.
Collapse
Affiliation(s)
- Yaping Lu
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China
- Key Laboratory of Vegetation Ecology, Ministry of Education, Changchun, China
| | - Huilan Ren
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China
- Key Laboratory of Vegetation Ecology, Ministry of Education, Changchun, China
| | - Zhongle Li
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Haixia Leng
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China
| | - Aoqiang Li
- School of Life Sciences, Central China Normal University, Wuhan, China
| | - Wentao Dai
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China
| | - Long Huang
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China
| | - Jiang Feng
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
| | - Keping Sun
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China
- Key Laboratory of Vegetation Ecology, Ministry of Education, Changchun, China
| |
Collapse
|
4
|
Isidoro-Ayza M, Lorch JM, Klein BS. The skin I live in: Pathogenesis of white-nose syndrome of bats. PLoS Pathog 2024; 20:e1012342. [PMID: 39207947 PMCID: PMC11361426 DOI: 10.1371/journal.ppat.1012342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024] Open
Abstract
The emergence of white-nose syndrome (WNS) in North America has resulted in mass mortalities of hibernating bats and total extirpation of local populations. The need to mitigate this disease has stirred a significant body of research to understand its pathogenesis. Pseudogymnoascus destructans, the causative agent of WNS, is a psychrophilic (cold-loving) fungus that resides within the class Leotiomycetes, which contains mainly plant pathogens and is unrelated to other consequential pathogens of animals. In this review, we revisit the unique biology of hibernating bats and P. destructans and provide an updated analysis of the stages and mechanisms of WNS progression. The extreme life history of hibernating bats, the psychrophilic nature of P. destructans, and its evolutionary distance from other well-characterized animal-infecting fungi translate into unique host-pathogen interactions, many of them yet to be discovered.
Collapse
Affiliation(s)
- Marcos Isidoro-Ayza
- Department of Pediatrics, Medicine and Medical Microbiology and Immunology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Jeffrey M. Lorch
- U.S. Geological Survey, National Wildlife Health Center, Madison, Wisconsin, United States of America
| | - Bruce S. Klein
- Department of Pediatrics, Medicine and Medical Microbiology and Immunology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| |
Collapse
|
5
|
Isidoro-Ayza M, Klein BS. Pathogenic strategies of Pseudogymnoascus destructans during torpor and arousal of hibernating bats. Science 2024; 385:194-200. [PMID: 38991070 DOI: 10.1126/science.adn5606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 05/14/2024] [Indexed: 07/13/2024]
Abstract
Millions of hibernating bats across North America have died from white-nose syndrome (WNS), an emerging disease caused by a psychrophilic (cold-loving) fungus, Pseudogymnoascus destructans, that invades their skin. Mechanisms of P. destructans invasion of bat epidermis remain obscure. Guided by our in vivo observations, we modeled hibernation with a newly generated little brown bat (Myotis lucifugus) keratinocyte cell line. We uncovered the stealth intracellular lifestyle of P. destructans, which inhibits apoptosis of keratinocytes and spreads through the cells by two epidermal growth factor receptor (EGFR)-dependent mechanisms: active penetration during torpor and induced endocytosis during arousal. Melanin of endocytosed P. destructans blocks endolysosomal maturation, facilitating P. destructans survival and germination after return to torpor. Blockade of EGFR aborts P. destructans entry into keratinocytes.
Collapse
Affiliation(s)
- Marcos Isidoro-Ayza
- Department of Pediatrics, Medicine and Medical Microbiology and Immunology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Bruce S Klein
- Department of Pediatrics, Medicine and Medical Microbiology and Immunology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53706, USA
| |
Collapse
|
6
|
Whiting-Fawcett F, Blomberg AS, Troitsky T, Meierhofer MB, Field KA, Puechmaille SJ, Lilley TM. A Palearctic view of a bat fungal disease. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2024:e14265. [PMID: 38616727 DOI: 10.1111/cobi.14265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 01/02/2024] [Accepted: 01/20/2024] [Indexed: 04/16/2024]
Abstract
The fungal infection causing white-nose disease in hibernating bats in North America has resulted in dramatic population declines of affected species, since the introduction of the causative agent Pseudogymnoascus destructans. The fungus is native to the Palearctic, where it also infects several bat species, yet rarely causes severe pathology or the death of the host. Pseudogymnoascus destructans infects bats during hibernation by invading and digesting the skin tissue, resulting in the disruption of torpor patterns and consequent emaciation. Relations among pathogen, host, and environment are complex, and individuals, populations, and species respond to the fungal pathogen in different ways. For example, the Nearctic Myotis lucifugus responds to infection by mounting a robust immune response, leading to immunopathology often contributing to mortality. In contrast, the Palearctic M. myotis shows no significant immunological response to infection. This lack of a strong response, resulting from the long coevolution between the hosts and the pathogen in the pathogen's native range, likely contributes to survival in tolerant species. After more than 15 years since the initial introduction of the fungus to North America, some of the affected populations are showing signs of recovery, suggesting that the fungus, hosts, or both are undergoing processes that may eventually lead to coexistence. The suggested or implemented management methods of the disease in North America have encompassed, for example, the use of probiotics and fungicides, vaccinations, and modifying the environmental conditions of the hibernation sites to limit the growth of the pathogen, intensity of infection, or the hosts' responses to it. Based on current knowledge from Eurasia, policy makers and conservation managers should refrain from disrupting the ongoing evolutionary processes and adopt a holistic approach to managing the epizootic.
Collapse
Affiliation(s)
- F Whiting-Fawcett
- Department of Evolution, Ecology and Behaviour, University of Liverpool, Liverpool, UK
- BatLab Finland, Finnish Museum of Natural History, University of Helsinki, Helsinki, Finland
| | - A S Blomberg
- BatLab Finland, Finnish Museum of Natural History, University of Helsinki, Helsinki, Finland
| | - T Troitsky
- BatLab Finland, Finnish Museum of Natural History, University of Helsinki, Helsinki, Finland
| | - M B Meierhofer
- BatLab Finland, Finnish Museum of Natural History, University of Helsinki, Helsinki, Finland
| | - K A Field
- Department of Biology, Bucknell University, Lewisburg, Pennsylvania, USA
| | - S J Puechmaille
- Institut des Sciences de l'Évolution Montpellier (ISEM), University of Montpellier, CNRS, EPHE, IRD, Montpellier, France
- Institut Universitaire de France, Paris, France
| | - T M Lilley
- BatLab Finland, Finnish Museum of Natural History, University of Helsinki, Helsinki, Finland
| |
Collapse
|
7
|
Li A, Leng H, Li Z, Jin L, Sun K, Feng J. Temporal dynamics of the bat wing transcriptome: Insight into gene-expression changes that enable protection against pathogen. Virulence 2023; 14:2156185. [PMID: 36599840 PMCID: PMC9815227 DOI: 10.1080/21505594.2022.2156185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Skin acts as a mechanical barrier between the body and its surrounding environment and plays an important role in resistance to pathogens. However, we still know little regarding skin responses to physiological changes, particularly with regard to responses against potential pathogens. We herein executed RNA-seq on the wing of the Rhinolophus ferrumequinum to assess gene-expression variations at four physiological stages: pre-hibernation, hibernation (early-hibernation and late-hibernation), and post-hibernation, as well as the gene-expression patterns of infected and uninfected bats with the Pseudogymnoascus destructans (Pd). Our results showed that a greater number of differentially expressed genes between the more disparate physiological stages. Functional enrichment analysis showed that the down-regulated response pathways in hibernating bats included phosphorus metabolism and immune response, indicating metabolic suppression and decreased whole immune function. We also found up-regulated genes in post-hibernating bats that included C-type lectin receptor signalling, Toll-like receptor signalling pathway, and cell adhesion, suggesting that the immune response and skin integrity of the wing were improved after bats emerged from their hibernation and that this facilitated clearing Pd from the integument. Additionally, we found that the genes involved in cytokine or chemokine activity were up-regulated in late-hibernation compared to early-hibernation and that FOSB regulation of immune cell activation was differentially expressed in bats infected with Pd during late-hibernation, implying that the host's innate immune function was enhanced during late-hibernation so as to resist pathogenic infection. Our findings highlight the concept that maintenance of intrinsic immunity provides protection against pathogenic infections in highly resistant bats.
Collapse
Affiliation(s)
- Aoqiang Li
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China,School of Life Sciences, Central China Normal University, Wuhan, China
| | - Haixia Leng
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China
| | - Zhongle Li
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China,College of Life Science, Jilin Agricultural University, Changchun, China
| | - Longru Jin
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China
| | - Keping Sun
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China,CONTACT Keping Sun
| | - Jiang Feng
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China,College of Life Science, Jilin Agricultural University, Changchun, China,Jiang Feng
| |
Collapse
|
8
|
Schoen A, Hölzer M, Müller MA, Wallerang KB, Drosten C, Marz M, Lamp B, Weber F. Functional comparisons of the virus sensor RIG-I from humans, the microbat Myotis daubentonii, and the megabat Rousettus aegyptiacus, and their response to SARS-CoV-2 infection. J Virol 2023; 97:e0020523. [PMID: 37728614 PMCID: PMC10653997 DOI: 10.1128/jvi.00205-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 07/09/2023] [Indexed: 09/21/2023] Open
Abstract
IMPORTANCE A common hypothesis holds that bats (order Chiroptera) are outstanding reservoirs for zoonotic viruses because of a special antiviral interferon (IFN) system. However, functional studies about key components of the bat IFN system are rare. RIG-I is a cellular sensor for viral RNA signatures that activates the antiviral signaling chain to induce IFN. We cloned and functionally characterized RIG-I genes from two species of the suborders Yangochiroptera and Yinpterochiroptera. The bat RIG-Is were conserved in their sequence and domain organization, and similar to human RIG-I in (i) mediating virus- and IFN-activated gene expression, (ii) antiviral signaling, (iii) temperature dependence, and (iv) recognition of RNA ligands. Moreover, RIG-I of Rousettus aegyptiacus (suborder Yinpterochiroptera) and of humans were found to recognize SARS-CoV-2 infection. Thus, members of both bat suborders encode RIG-Is that are comparable to their human counterpart. The ability of bats to harbor zoonotic viruses therefore seems due to other features.
Collapse
Affiliation(s)
- Andreas Schoen
- Institute for Virology, FB10-Veterinary Medicine, Justus-Liebig University, Giessen, Germany
| | - Martin Hölzer
- RNA Bioinformatics and High-Throughput Analysis, Friedrich Schiller University Jena, Jena, Germany
- European Virus Bioinformatics Center, Jena, Germany
| | - Marcel A. Müller
- German Centre for Infection Research (DZIF), Partner Sites Giessen and Charité, Berlin, Germany
- Institute of Virology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Kai B. Wallerang
- Institute for Virology, FB10-Veterinary Medicine, Justus-Liebig University, Giessen, Germany
| | - Christian Drosten
- European Virus Bioinformatics Center, Jena, Germany
- German Centre for Infection Research (DZIF), Partner Sites Giessen and Charité, Berlin, Germany
- Institute of Virology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Manja Marz
- RNA Bioinformatics and High-Throughput Analysis, Friedrich Schiller University Jena, Jena, Germany
- European Virus Bioinformatics Center, Jena, Germany
| | - Benjamin Lamp
- Institute for Virology, FB10-Veterinary Medicine, Justus-Liebig University, Giessen, Germany
| | - Friedemann Weber
- Institute for Virology, FB10-Veterinary Medicine, Justus-Liebig University, Giessen, Germany
- European Virus Bioinformatics Center, Jena, Germany
- German Centre for Infection Research (DZIF), Partner Sites Giessen and Charité, Berlin, Germany
| |
Collapse
|
9
|
Jiang C, Storey KB, Yang H, Sun L. Aestivation in Nature: Physiological Strategies and Evolutionary Adaptations in Hypometabolic States. Int J Mol Sci 2023; 24:14093. [PMID: 37762394 PMCID: PMC10531719 DOI: 10.3390/ijms241814093] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 08/14/2023] [Accepted: 08/21/2023] [Indexed: 09/29/2023] Open
Abstract
Aestivation is considered to be one of the "purest" hypometabolic states in nature, as it involves aerobic dormancy that can be induced and sustained without complex factors. Animals that undergo aestivation to protect themselves from environmental stressors such as high temperatures, droughts, and food shortages. However, this shift in body metabolism presents new challenges for survival, including oxidative stress upon awakening from aestivation, accumulation of toxic metabolites, changes in energy sources, adjustments to immune status, muscle atrophy due to prolonged immobility, and degeneration of internal organs due to prolonged food deprivation. In this review, we summarize the physiological and metabolic strategies, key regulatory factors, and networks utilized by aestivating animals to address the aforementioned components of aestivation. Furthermore, we present a comprehensive overview of the advancements made in aestivation research across major species, including amphibians, fish, reptiles, annelids, mollusks, and echinoderms, categorized according to their respective evolutionary positions. This approach offers a distinct perspective for comparative analysis, facilitating an understanding of the shared traits and unique features of aestivation across different groups of organisms.
Collapse
Affiliation(s)
- Chunxi Jiang
- CAS Key Laboratory of Marine Ecology and Environmental Sciences & Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; (C.J.); (H.Y.)
- Laboratory for Marine Ecology and Environmental Science & Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Kenneth B. Storey
- Department of Biology, Carleton University, Ottawa, ON K1S 5B6, Canada;
| | - Hongsheng Yang
- CAS Key Laboratory of Marine Ecology and Environmental Sciences & Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; (C.J.); (H.Y.)
- Laboratory for Marine Ecology and Environmental Science & Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lina Sun
- CAS Key Laboratory of Marine Ecology and Environmental Sciences & Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; (C.J.); (H.Y.)
- Laboratory for Marine Ecology and Environmental Science & Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| |
Collapse
|
10
|
Dundarova H, Ivanova-Aleksandrova N, Bednarikova S, Georgieva I, Kirov K, Miteva K, Neov B, Ostoich P, Pikula J, Zukal J, Hristov P. Phylogeographic Aspects of Bat Lyssaviruses in Europe: A Review. Pathogens 2023; 12:1089. [PMID: 37764897 PMCID: PMC10534866 DOI: 10.3390/pathogens12091089] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/08/2023] [Accepted: 08/22/2023] [Indexed: 09/29/2023] Open
Abstract
During the last few decades, bat lyssaviruses have become the topic of intensive molecular and epidemiological investigations. Since ancient times, rhabdoviruses have caused fatal encephalitis in humans which has led to research into effective strategies for their eradication. Modelling of potential future cross-species virus transmissions forms a substantial component of the recent infection biology of rabies. In this article, we summarise the available data on the phylogeography of both bats and lyssaviruses in Europe and the adjacent reg ions, especially in the contact zone between the Palearctic and Ethiopian realms. Within these zones, three bat families are present with high potential for cross-species transmission and the spread of lyssaviruses in Phylogroup II to Europe (part of the western Palearctic). The lack of effective therapies for rabies viruses in Phylogroup II and the most divergent lyssaviruses generates impetus for additional phylogenetic and virological research within this geographical region.
Collapse
Affiliation(s)
- Heliana Dundarova
- Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 1 Tsar Osvoboditel Blvd., 1000 Sofia, Bulgaria
| | | | - Sarka Bednarikova
- Department of Ecology and Diseases of Zoo Animals, Game, Fish and Bees, University of Veterinary Sciences Brno, Palackého tř. 1946/1, 612 42 Brno, Czech Republic
| | - Irina Georgieva
- National Centre of Infectious and Parasitic Diseases, 26 Yanko Sakazov Blvd., 1504 Sofia, Bulgaria
| | - Krasimir Kirov
- Faculty of Biology, University of Plovdiv “Paisii Hilendarski”, 24 Tzar Assen Str., 4000 Plovdiv, Bulgaria
| | - Kalina Miteva
- Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 1 Tsar Osvoboditel Blvd., 1000 Sofia, Bulgaria
| | - Boyko Neov
- Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 1 Tsar Osvoboditel Blvd., 1000 Sofia, Bulgaria
| | - Peter Ostoich
- Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 1 Tsar Osvoboditel Blvd., 1000 Sofia, Bulgaria
| | - Jiri Pikula
- Department of Ecology and Diseases of Zoo Animals, Game, Fish and Bees, University of Veterinary Sciences Brno, Palackého tř. 1946/1, 612 42 Brno, Czech Republic
| | - Jan Zukal
- Institute of Vertebrate Biology, Czech Academy of Sciences, Květná 8, 603 65 Brno, Czech Republic
| | - Peter Hristov
- Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, 1 Tsar Osvoboditel Blvd., 1000 Sofia, Bulgaria
| |
Collapse
|
11
|
Xu M, Cao L, Lu D, Hu Z, Yue Y. Application of Swarm Intelligence Optimization Algorithms in Image Processing: A Comprehensive Review of Analysis, Synthesis, and Optimization. Biomimetics (Basel) 2023; 8:235. [PMID: 37366829 DOI: 10.3390/biomimetics8020235] [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: 05/10/2023] [Revised: 05/27/2023] [Accepted: 06/01/2023] [Indexed: 06/28/2023] Open
Abstract
Image processing technology has always been a hot and difficult topic in the field of artificial intelligence. With the rise and development of machine learning and deep learning methods, swarm intelligence algorithms have become a hot research direction, and combining image processing technology with swarm intelligence algorithms has become a new and effective improvement method. Swarm intelligence algorithm refers to an intelligent computing method formed by simulating the evolutionary laws, behavior characteristics, and thinking patterns of insects, birds, natural phenomena, and other biological populations. It has efficient and parallel global optimization capabilities and strong optimization performance. In this paper, the ant colony algorithm, particle swarm optimization algorithm, sparrow search algorithm, bat algorithm, thimble colony algorithm, and other swarm intelligent optimization algorithms are deeply studied. The model, features, improvement strategies, and application fields of the algorithm in image processing, such as image segmentation, image matching, image classification, image feature extraction, and image edge detection, are comprehensively reviewed. The theoretical research, improvement strategies, and application research of image processing are comprehensively analyzed and compared. Combined with the current literature, the improvement methods of the above algorithms and the comprehensive improvement and application of image processing technology are analyzed and summarized. The representative algorithms of the swarm intelligence algorithm combined with image segmentation technology are extracted for list analysis and summary. Then, the unified framework, common characteristics, different differences of the swarm intelligence algorithm are summarized, existing problems are raised, and finally, the future trend is projected.
Collapse
Affiliation(s)
- Minghai Xu
- School of Intelligent Manufacturing and Electronic Engineering, Wenzhou University of Technology, Wenzhou 325035, China
| | - Li Cao
- School of Intelligent Manufacturing and Electronic Engineering, Wenzhou University of Technology, Wenzhou 325035, China
| | - Dongwan Lu
- Intelligent Information Systems Institute, Wenzhou University, Wenzhou 325035, China
| | - Zhongyi Hu
- Intelligent Information Systems Institute, Wenzhou University, Wenzhou 325035, China
| | - Yinggao Yue
- School of Intelligent Manufacturing and Electronic Engineering, Wenzhou University of Technology, Wenzhou 325035, China
- Intelligent Information Systems Institute, Wenzhou University, Wenzhou 325035, China
| |
Collapse
|
12
|
Harazim M, Perrot J, Varet H, Bourhy H, Lannoy J, Pikula J, Seidlová V, Dacheux L, Martínková N. Transcriptomic responses of bat cells to European bat lyssavirus 1 infection under conditions simulating euthermia and hibernation. BMC Immunol 2023; 24:7. [PMID: 37085747 PMCID: PMC10120247 DOI: 10.1186/s12865-023-00542-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 03/31/2023] [Indexed: 04/23/2023] Open
Abstract
BACKGROUND Coevolution between pathogens and their hosts decreases host morbidity and mortality. Bats host and can tolerate viruses which can be lethal to other vertebrate orders, including humans. Bat adaptations to infection include localized immune response, early pathogen sensing, high interferon expression without pathogen stimulation, and regulated inflammatory response. The immune reaction is costly, and bats suppress high-cost metabolism during torpor. In the temperate zone, bats hibernate in winter, utilizing a specific behavioural adaptation to survive detrimental environmental conditions and lack of energy resources. Hibernation torpor involves major physiological changes that pose an additional challenge to bat-pathogen coexistence. Here, we compared bat cellular reaction to viral challenge under conditions simulating hibernation, evaluating the changes between torpor and euthermia. RESULTS We infected the olfactory nerve-derived cell culture of Myotis myotis with an endemic bat pathogen, European bat lyssavirus 1 (EBLV-1). After infection, the bat cells were cultivated at two different temperatures, 37 °C and 5 °C, to examine the cell response during conditions simulating euthermia and torpor, respectively. The mRNA isolated from the cells was sequenced and analysed for differential gene expression attributable to the temperature and/or infection treatment. In conditions simulating euthermia, infected bat cells produce an excess signalling by multitude of pathways involved in apoptosis and immune regulation influencing proliferation of regulatory cell types which can, in synergy with other produced cytokines, contribute to viral tolerance. We found no up- or down-regulated genes expressed in infected cells cultivated at conditions simulating torpor compared to non-infected cells cultivated under the same conditions. When studying the reaction of uninfected cells to the temperature treatment, bat cells show an increased production of heat shock proteins (HSPs) with chaperone activity, improving the bat's ability to repair molecular structures damaged due to the stress related to the temperature change. CONCLUSIONS The lack of bat cell reaction to infection in conditions simulating hibernation may contribute to the virus tolerance or persistence in bats. Together with the cell damage repair mechanisms induced in response to hibernation, the immune regulation may promote bats' ability to act as reservoirs of zoonotic viruses such as lyssaviruses.
Collapse
Affiliation(s)
- Markéta Harazim
- Institute of Vertebrate Biology, Czech Academy of Sciences, Květná 8, 60300, Brno, Czechia.
- Department of Botany and Zoology, Masaryk University, Kotlářská 2, 61137, Brno, Czechia.
| | - Juliette Perrot
- Institut Pasteur, Université Paris Cité Lyssavirus, Epidemiology and Neuropathology Unit, 28 rue du Docteur Roux, 75724, Paris Cedex 15, France
| | - Hugo Varet
- Institut Pasteur, Université Paris Cité Bioinformatics and Biostatistics Hub, 28 rue du Docteur Roux, 75724, Paris Cedex 15, France
| | - Hervé Bourhy
- Institut Pasteur, Université Paris Cité Lyssavirus, Epidemiology and Neuropathology Unit, 28 rue du Docteur Roux, 75724, Paris Cedex 15, France
| | - Julien Lannoy
- Institut Pasteur, Université Paris Cité Lyssavirus, Epidemiology and Neuropathology Unit, 28 rue du Docteur Roux, 75724, Paris Cedex 15, France
| | - Jiri Pikula
- Department of Ecology and Diseases of Zoo Animals, Game, Fish and Bees, University of Veterinary Sciences Brno, Palackého třída 1946/1, 61242, Brno, Czechia
| | - Veronika Seidlová
- Department of Ecology and Diseases of Zoo Animals, Game, Fish and Bees, University of Veterinary Sciences Brno, Palackého třída 1946/1, 61242, Brno, Czechia
| | - Laurent Dacheux
- Institut Pasteur, Université Paris Cité Lyssavirus, Epidemiology and Neuropathology Unit, 28 rue du Docteur Roux, 75724, Paris Cedex 15, France
| | - Natália Martínková
- Institute of Vertebrate Biology, Czech Academy of Sciences, Květná 8, 60300, Brno, Czechia
- RECETOX, Masaryk University, Kotlářská 2, 61137, Brno, Czechia
| |
Collapse
|
13
|
Sewall BJ, Turner GG, Scafini MR, Gagnon MF, Johnson JS, Keel MK, Anis E, Lilley TM, White JP, Hauer CL, Overton BE. Environmental control reduces white‐nose syndrome infection in hibernating bats. Anim Conserv 2023. [DOI: 10.1111/acv.12852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Affiliation(s)
- B. J. Sewall
- Department of Biology Temple University Philadelphia PA USA
| | | | | | - M. F. Gagnon
- Department of Biology Temple University Philadelphia PA USA
| | - J. S. Johnson
- Department of Biological Sciences Ohio University Athens OH USA
- School of Information Technology University of Cincinnati Cincinnati OH USA
| | - M. K. Keel
- School of Veterinary Medicine University of California Davis CA USA
| | - E. Anis
- Department of Pathobiology University of Pennsylvania, School of Veterinary Medicine, New Bolton Center Kennett Square PA USA
| | - T. M. Lilley
- Finnish Museum of Natural History University of Helsinki Helsinki Finland
| | - J. P. White
- Wisconsin Department of Natural Resources Madison WI USA
| | - C. L. Hauer
- Department of Biology Temple University Philadelphia PA USA
| | - B. E. Overton
- Department of Biology Commonwealth University of Pennsylvania Lock Haven PA USA
| |
Collapse
|
14
|
Pannkuk EL, Dorville NASY, Bansal S, Bansal S, Dzal YA, Fletcher QE, Norquay KJO, Fornace AJ, Willis CKR. White-Nose Syndrome Disrupts the Splenic Lipidome of Little Brown Bats ( Myotis lucifugus) at Early Disease Stages. J Proteome Res 2023; 22:182-192. [PMID: 36479878 PMCID: PMC9929917 DOI: 10.1021/acs.jproteome.2c00600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
White-nose syndrome (WNS)-positive little brown bats (Myotis lucifugus) may exhibit immune responses including increased cytokine and pro-inflammatory mediator gene levels. Bioactive lipid mediators (oxylipins) formed by enzymatic oxidation of polyunsaturated fatty acids can contribute to these immune responses, but have not been investigated in WNS pathophysiology. Nonenzymatic conversion of polyunsaturated fatty acids can also occur due to reactive oxygen species, however, these enantiomeric isomers will lack the same signaling properties. In this study, we performed a series of targeted lipidomic approaches on laboratory Pseudogymnoascus destructans-inoculated bats to assess changes in their splenic lipidome, including the formation of lipid mediators at early stages of WNS. Hepatic lipids previously identified were also resolved to a higher structural detail. We compared WNS-susceptible M. lucifugus to a WNS-resistant species, the big brown bat (Eptesicus fuscus). Altered splenic lipid levels were only observed in M. lucifugus. Differences in splenic free fatty acids included both omega-3 and omega-6 compounds. Increased levels of an enantiomeric monohydroxy DHA mixture were found, suggesting nonenzymatic formation. Changes in previously identified hepatic lipids were confined to omega-3 constituents. Together, these results suggest that increased oxidative stress, but not an inflammatory response, is occurring in bats at early stages of WNS that precedes fat depletion. These data have been submitted to metabolomics workbench and assigned a study number ST002304.
Collapse
Affiliation(s)
- Evan L. Pannkuk
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, United States of America,Department of Biochemistry and Molecular & Cellular Biology, Georgetown University Medical Center, Washington, DC 20057, United States of America,Center for Metabolomic Studies, Georgetown University, Washington, DC 20057, United States of America,Corresponding Authors: Evan L. Pannkuk, PhD, Georgetown University, 3970 Reservoir Road, NW, New Research Building, Room E504, Washington, DC, USA, 20057, , Phone: (202) 687-5650, Craig K.R. Willis, PhD, University of Winnipeg, 515 Portage Ave, Winnipeg, MB, R3B 2E9, Canada, , Phone: (204) 786-9433
| | - Nicole A. S.-Y. Dorville
- Department of Biology and Centre for Forest Interdisciplinary Research (C-FIR), University of Winnipeg, Winnipeg, MB, R3B 2E9, Canada
| | - Shivani Bansal
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, United States of America
| | - Sunil Bansal
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, United States of America
| | - Yvonne A. Dzal
- Department of Biological Sciences, Simon Fraser University, Burnaby, BC, BC V5A 1S6, Canada
| | - Quinn E. Fletcher
- Department of Biology and Centre for Forest Interdisciplinary Research (C-FIR), University of Winnipeg, Winnipeg, MB, R3B 2E9, Canada
| | - Kaleigh J. O. Norquay
- Department of Biology and Centre for Forest Interdisciplinary Research (C-FIR), University of Winnipeg, Winnipeg, MB, R3B 2E9, Canada
| | - Albert J. Fornace
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC 20057, United States of America,Department of Biochemistry and Molecular & Cellular Biology, Georgetown University Medical Center, Washington, DC 20057, United States of America,Center for Metabolomic Studies, Georgetown University, Washington, DC 20057, United States of America
| | - Craig K. R. Willis
- Department of Biology and Centre for Forest Interdisciplinary Research (C-FIR), University of Winnipeg, Winnipeg, MB, R3B 2E9, Canada,Corresponding Authors: Evan L. Pannkuk, PhD, Georgetown University, 3970 Reservoir Road, NW, New Research Building, Room E504, Washington, DC, USA, 20057, , Phone: (202) 687-5650, Craig K.R. Willis, PhD, University of Winnipeg, 515 Portage Ave, Winnipeg, MB, R3B 2E9, Canada, , Phone: (204) 786-9433
| |
Collapse
|
15
|
Balzer EW, McBurney TS, Broders HG. Little brown Myotis roosts are spatially associated with foraging resources on Prince Edward Island. WILDLIFE SOC B 2022. [DOI: 10.1002/wsb.1405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Evan W. Balzer
- University of Waterloo 200 University Avenue West Waterloo ON N2L 3G2 Canada
| | - Tessa S. McBurney
- Canadian Wildlife Health Cooperative, Atlantic Region, Atlantic Veterinary College University of Prince Edward Island 550 University Avenue Charlottetown PE C1A 4P3 Canada
| | - Hugh G. Broders
- University of Waterloo 200 University Avenue West Waterloo ON N2L 3G2 Canada
| |
Collapse
|
16
|
Forney R, Rios-Sotelo G, Lindauer A, Willis CKR, Voyles J. Temperature shifts associated with bat arousals during hibernation inhibit the growth of Pseudogymnoascus destructans. ROYAL SOCIETY OPEN SCIENCE 2022; 9:211986. [PMID: 36425515 PMCID: PMC9682300 DOI: 10.1098/rsos.211986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 11/06/2022] [Indexed: 06/16/2023]
Abstract
Temperature is a critically important factor in many infectious disease systems, because it can regulate responses in both the host and the pathogen. White-nose syndrome (WNS) in bats is a severe infectious disease caused by the temperature-sensitive fungus, Pseudogymnoascus destructans (Pd). One feature of WNS is an increase in the frequency of arousal bouts (i.e. when bat body temperatures are elevated) in Pd-infected bats during hibernation. While several studies have proposed that increased frequency of arousals may play a role in the pathophysiology of WNS, it is unknown if the temperature fluctuations might mediate Pd growth. We hypothesized that exposure to a high frequency of elevated temperatures would reduce Pd growth due to thermal constraints on the pathogen. We simulated the thermal conditions for arousal bouts of uninfected and infected bats during hibernation (fluctuating from 8 to 25°C at two different rates) and quantified Pd growth in vitro. We found that increased exposure to high temperatures significantly reduced Pd growth. Because temperature is one of the most critical abiotic factors mediating host-pathogen interactions, resolving how Pd responds to fluctuating temperatures will provide insights for understanding WNS in bats and other fungal diseases.
Collapse
Affiliation(s)
- Ronny Forney
- Department of Biology, University of Nevada, Reno, NV, USA
| | | | - Alexa Lindauer
- Department of Biology, University of Nevada, Reno, NV, USA
- Sierra Nevada Aquatic Research Laboratory, University of California, Santa Barbara, Mammoth Lakes, CA, USA
| | - Craig K. R. Willis
- Department of Biology, University of Winnipeg, Winnipeg, Manitoba, Canada
| | - Jamie Voyles
- Department of Biology, University of Nevada, Reno, NV, USA
| |
Collapse
|
17
|
Pettett CE, Salazar RD, Al-Hajri A, Al-Jabiri H, Macdonald DW, Yamaguchi N. Sex differences in the winter activity of desert hedgehogs (Paraechinus aethiopicus) in a resource-rich habitat in Qatar. Sci Rep 2022; 12:11118. [PMID: 35778424 PMCID: PMC9249915 DOI: 10.1038/s41598-022-15383-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 06/23/2022] [Indexed: 11/09/2022] Open
Abstract
Hedgehogs’ wide distribution and breadth of habitat use means they are a good model taxon for investigating behavioural responses to winter conditions, such as low temperatures and resource availability. We investigated the over-winter behaviour of desert hedgehogs (Paraechinus aethiopicus) in Qatar by radio-tracking 20 individuals and monitoring the body mass of 31 hedgehogs. Females spent more nights (38.63% of nights tracked) inactive than males (12.6%) and had lower monthly activity levels. The mean temperature on nights where hedgehogs were inactive was 14.9 °C compared with 17.0 °C when hedgehogs were active. By December, females lost a higher percentage of their November body mass than did males, but by February males had lost a higher percentage than females. We conclude that these sex differences in behaviour are a result of differing reproductive strategies with males becoming more active early in spring to search for mates, whereas female hedgehogs conserve energy for producing and raising young and avoid harassment by males. The winter activity of males may be facilitated by the resource-rich environment created by humans at this study site, and basking behaviour. This study highlights intraspecific and interspecific variation in behavioural strategies/tactics in response to winter conditions.
Collapse
Affiliation(s)
- Carly E Pettett
- WildCRU, Department of Zoology, University of Oxford, The Recanati-Kaplan Centre, Tubney House, Abingdon Road, Tubney, Abingdon, OX13 5QL, UK
| | - Rosie D Salazar
- WildCRU, Department of Zoology, University of Oxford, The Recanati-Kaplan Centre, Tubney House, Abingdon Road, Tubney, Abingdon, OX13 5QL, UK
| | - Afra Al-Hajri
- Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, PO Box 2713, Doha, Qatar
| | - Hayat Al-Jabiri
- Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, PO Box 2713, Doha, Qatar
| | - David W Macdonald
- WildCRU, Department of Zoology, University of Oxford, The Recanati-Kaplan Centre, Tubney House, Abingdon Road, Tubney, Abingdon, OX13 5QL, UK
| | - Nobuyuki Yamaguchi
- Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, PO Box 2713, Doha, Qatar. .,Institute of Tropical Biodiversity and Sustainable Development, University of Malaysia Terengganu, 21030, Kuala Nerus, Malaysia.
| |
Collapse
|
18
|
Hadj-Moussa H, Hawkins LJ, Storey KB. Role of MicroRNAs in Extreme Animal Survival Strategies. Methods Mol Biol 2022; 2257:311-347. [PMID: 34432286 DOI: 10.1007/978-1-0716-1170-8_16] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The critical role microRNAs play in modulating global functions is emerging, both in the maintenance of homeostatic mechanisms and in the adaptation to diverse environmental stresses. When stressed, cells must divert metabolic requirements toward immediate survival and eventual recovery and the unique features of miRNAs, such as their relatively ATP-inexpensive biogenesis costs, and the quick and reversible nature of their action, renders them excellent "master controllers" for rapid responses. Many animal survival strategies for dealing with extreme environmental pressures involve prolonged retreats into states of suspended animation to extend the time that they can survive on their limited internal fuel reserves until conditions improve. The ability to retreat into such hypometabolic states is only possible by coupling the global suppression of nonessential energy-expensive functions with an activation of prosurvival networks, a process in which miRNAs are now known to play a major role. In this chapter, we discuss the activation, expression, biogenesis, and unique attributes of miRNA regulation required to facilitate profound metabolic rate depression and implement stress-specific metabolic adaptations. We examine the role of miRNA in strategies of biochemical adaptation including mammalian hibernation, freeze tolerance, freeze avoidance, anoxia and hypoxia survival, estivation, and dehydration tolerance. By comparing these seemingly different adaptive programs in traditional and exotic animal models, we highlight both unique and conserved miRNA-meditated mechanisms for survival. Additional topics discussed include transcription factor networks, temperature dependent miRNA-targeting, and novel species-specific and stress-specific miRNAs.
Collapse
Affiliation(s)
| | - Liam J Hawkins
- Department of Biology, Carleton University, Ottawa, ON, Canada
| | | |
Collapse
|
19
|
McGuire LP, Johnson EM, Frick WF, Boyles JG. Temperature alone is insufficient to understand hibernation energetics. J Exp Biol 2021; 224:269251. [PMID: 34160026 DOI: 10.1242/jeb.239772] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 06/16/2021] [Indexed: 11/20/2022]
Abstract
Energy conservation has long been a focal point in hibernation research. A long-standing assumption is that ambient temperature (Ta) largely defines the rate of energy expenditure because of well-known relationships between Ta, metabolic rate and frequency of arousal from torpor. Body condition and humidity also affect energy expenditure but are usually considered secondary factors. We held tricolored bats (Perimyotis subflavus) in captivity under multiple environmental conditions to directly compare the importance of Ta, fat mass and humidity for hibernation energy expenditure. Fat mass was the best predictor of female mass loss, followed by Ta and humidity. However, males had less fat and adopted a more energetically conservative hibernation strategy. Our results demonstrate that understanding the evolution of behavior, physiology and ecology of hibernation requires disentangling the relative contributions of multiple drivers of hibernation energetics, and that Ta is not always the most important factor driving energy expenditure.
Collapse
Affiliation(s)
- Liam P McGuire
- Department of Biology, University of Waterloo, Waterloo, ON, Canada, N2L 3G1.,Department of Biological Sciences, Texas Tech University, Lubbock, TX 79401, USA
| | - Emily M Johnson
- Department of Biological Sciences, Texas Tech University, Lubbock, TX 79401, USA
| | - Winifred F Frick
- Bat Conservation International, Austin, TX 78746, USA.,Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, CA 95060, USA
| | - Justin G Boyles
- Cooperative Wildlife Research Laboratory and School of Biological Sciences, Southern Illinois University, Carbondale, IL62901, USA
| |
Collapse
|
20
|
Whiting-Fawcett F, Field KA, Puechmaille SJ, Blomberg AS, Lilley TM. Heterothermy and antifungal responses in bats. Curr Opin Microbiol 2021; 62:61-67. [PMID: 34098511 DOI: 10.1016/j.mib.2021.05.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/21/2021] [Accepted: 05/10/2021] [Indexed: 11/28/2022]
Abstract
Hibernation, a period where bats have suppressed immunity and low body temperatures, provides the psychrophilic fungus Pseudogymnoascus destructans the opportunity to colonise bat skin, leading to severe disease in susceptible species. Innate immunity, which requires less energy and may remain more active during torpor, can control infections with local inflammation in some bat species that are resistant to infection. If infection is not controlled before emergence from hibernation, ineffective adaptive immune mechanisms are activated, including incomplete Th1, ineffective Th2, and variable Th17 responses. The Th17 and neutrophil responses, normally beneficial antifungal mechanisms, appear to be sources of immunopathology for susceptible bat species, because they are hyperactivated after return to homeothermy. Non-susceptible species show both well-balanced and suppressed immune responses both during and after hibernation.
Collapse
Affiliation(s)
- Flora Whiting-Fawcett
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom
| | | | | | | | - Thomas M Lilley
- Finnish Museum of Natural History, University of Helsinki, Helsinki, Finland.
| |
Collapse
|
21
|
Fritze M, Puechmaille SJ, Costantini D, Fickel J, Voigt CC, Czirják GÁ. Determinants of defence strategies of a hibernating European bat species towards the fungal pathogen Pseudogymnoascus destructans. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2021; 119:104017. [PMID: 33476670 DOI: 10.1016/j.dci.2021.104017] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 01/12/2021] [Accepted: 01/12/2021] [Indexed: 06/12/2023]
Abstract
Pseudogymnoascus destructans (Pd), the causative agent of white-nose syndrome in North America, has decimated bat populations within a decade. The fungus impacts bats during hibernation when physiological functions, including immune responses, are down-regulated. Studies have shown that Pd is native to Europe, where it is not associated with mass mortalities. Moreover, genomic and proteomic studies indicated that European bats may have evolved an effective immune defence, which is lacking in North American bats. However, it is still unclear which defence strategy enables European bats to cope with the pathogen. Here, we analyzed selected physiological and immunological parameters in torpid, Pd infected European greater mouse-eared bats (Myotis myotis) showing three different levels of infection (asymptomatic, mild and severe symptoms). From a subset of the studied bats we tracked skin temperatures during one month of hibernation. Contrasting North American bats, arousal patterns remained unaffected by Pd infections in M. myotis. In general, heavier M. myotis aroused more often from hibernation and showed less severe disease symptoms than lean individuals; most likely because heavy bats were capable of reducing the Pd load more effectively than lean individuals. In the blood of severely infected bats, we found higher gene expression levels of an inflammatory cytokine (IL-1β), but lower levels of an acute phase protein (haptoglobin), reactive oxygen metabolites (ROMs) and plasma non-enzymatic antioxidant capacity (OXY) compared to conspecifics with lower levels of infection. We conclude that M. myotis, and possibly also other European bat species, tolerate Pd infections during torpor by using selected acute phase response parameters at baseline levels, yet without arousing from torpor and without synthesizing additional immune molecules.
Collapse
Affiliation(s)
- Marcus Fritze
- Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str. 17, 10315, Berlin, Germany; Institute of Biology, Freie Universität Berlin, Takustr. 6, 14195, Berlin, Germany.
| | - Sebastien J Puechmaille
- Institut des Sciences de L'Evolution, University of Montpellier, CNRS, EPHE, IRD, Montpellier, 34095, Montpellier, France
| | - David Costantini
- Unité Physiologie Moléculaire et Adaptation (PhyMA), Muséum National D'Histoire Naturelle, CNRS, CP32, 57 Rue Cuvier, 75005, Paris, France
| | - Jörns Fickel
- Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str. 17, 10315, Berlin, Germany; Institute for Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476, Potsdam, Germany
| | - Christian C Voigt
- Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str. 17, 10315, Berlin, Germany; Institute of Biology, Freie Universität Berlin, Takustr. 6, 14195, Berlin, Germany
| | - Gábor Á Czirják
- Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Str. 17, 10315, Berlin, Germany
| |
Collapse
|
22
|
Abstract
The recent introduction of Pseudogymnoascus destructans (the fungal pathogen that causes white-nose syndrome in bats) from Eurasia to North America has resulted in the collapse of North American bat populations and restructured species communities. The long evolutionary history between P. destructans and bats in Eurasia makes understanding host life history essential to uncovering the ecology of P. destructans. In this Review, we combine information on pathogen and host biology to understand the patterns of P. destructans spread, seasonal transmission ecology, the pathogenesis of white-nose syndrome and the cross-scale impact from individual hosts to ecosystems. Collectively, this research highlights how early pathogen detection and quantification of host impacts has accelerated the understanding of this newly emerging infectious disease.
Collapse
|
23
|
Johnson JS, Sharp NW, Monarchino MN, Lilley TM, Edelman AJ. No Sign of Infection in Free-Ranging Myotis austroriparius Hibernating in the Presence of Pseudogymnoascus destructans in Alabama. SOUTHEAST NAT 2021. [DOI: 10.1656/058.020.0102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Joseph S. Johnson
- Department of Biological Sciences, Ohio University, Athens, OH 45701
| | - Nicholas W. Sharp
- Alabama Non-game Wildlife Program, Division of Wildlife and Freshwater Fisheries, Tanner, AL 35671
| | | | - Thomas M. Lilley
- Finnish Museum of Natural History, University of Helsinki, Helsinki, Finland
| | - Andrew J. Edelman
- Department of Biology, University of West Georgia, Carrollton, GA 30118
| |
Collapse
|
24
|
Gignoux-Wolfsohn SA, Pinsky ML, Kerwin K, Herzog C, Hall M, Bennett AB, Fefferman NH, Maslo B. Genomic signatures of selection in bats surviving white-nose syndrome. Mol Ecol 2021; 30:5643-5657. [PMID: 33476441 DOI: 10.1111/mec.15813] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 01/13/2021] [Accepted: 01/14/2021] [Indexed: 02/06/2023]
Abstract
Rapid evolution of advantageous traits following abrupt environmental change can help populations recover from demographic decline. However, for many introduced diseases affecting longer-lived, slower reproducing hosts, mortality is likely to outpace the acquisition of adaptive de novo mutations. Adaptive alleles must therefore be selected from standing genetic variation, a process that leaves few detectable genomic signatures. Here, we present whole genome evidence for selection in bat populations that are recovering from white-nose syndrome (WNS). We collected samples both during and after a WNS-induced mass mortality event in two little brown bat populations that are beginning to show signs of recovery and found signatures of soft sweeps from standing genetic variation at multiple loci throughout the genome. We identified one locus putatively under selection in a gene associated with the immune system. Multiple loci putatively under selection were located within genes previously linked to host response to WNS as well as to changes in metabolism during hibernation. Results from two additional populations suggested that loci under selection may differ somewhat among populations. Through these findings, we suggest that WNS-induced selection may contribute to genetic resistance in this slowly reproducing species threatened with extinction.
Collapse
Affiliation(s)
- Sarah A Gignoux-Wolfsohn
- Department of Ecology, Evolution, and Natural Resources, Rutgers The State University of New Jersey, New Brunswick, NJ, USA
| | - Malin L Pinsky
- Department of Ecology, Evolution, and Natural Resources, Rutgers The State University of New Jersey, New Brunswick, NJ, USA
| | - Kathleen Kerwin
- Department of Ecology, Evolution, and Natural Resources, Rutgers The State University of New Jersey, New Brunswick, NJ, USA
| | - Carl Herzog
- New York State Department of Environmental Conservation, Albany, NY, USA
| | - MacKenzie Hall
- Endangered and Nongame Species Program, New Jersey Department of Environmental Protection, Trenton, NJ, USA
| | | | - Nina H Fefferman
- Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN, USA.,National Institute for Mathematical and Biological Synthesis, University of Tennessee, Tennessee, TN, USA
| | - Brooke Maslo
- Department of Ecology, Evolution, and Natural Resources, Rutgers The State University of New Jersey, New Brunswick, NJ, USA
| |
Collapse
|
25
|
Davy CM, Donaldson ME, Bandouchova H, Breit AM, Dorville NA, Dzal YA, Kovacova V, Kunkel EL, Martínková N, Norquay KJ, Paterson JE, Zukal J, Pikula J, Willis CK, Kyle CJ. Transcriptional host-pathogen responses of Pseudogymnoascus destructans and three species of bats with white-nose syndrome. Virulence 2020; 11:781-794. [PMID: 32552222 PMCID: PMC7549942 DOI: 10.1080/21505594.2020.1768018] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 03/07/2020] [Accepted: 03/31/2020] [Indexed: 12/13/2022] Open
Abstract
Understanding how context (e.g., host species, environmental conditions) drives disease susceptibility is an essential goal of disease ecology. We hypothesized that in bat white-nose syndrome (WNS), species-specific host-pathogen interactions may partly explain varying disease outcomes among host species. We characterized bat and pathogen transcriptomes in paired samples of lesion-positive and lesion-negative wing tissue from bats infected with Pseudogymnoascus destructans in three parallel experiments. The first two experiments analyzed samples collected from the susceptible Nearctic Myotis lucifugus and the less-susceptible Nearctic Eptesicus fuscus, following experimental infection and hibernation in captivity under controlled conditions. The third experiment applied the same analyses to paired samples from infected, free-ranging Myotis myotis, a less susceptible, Palearctic species, following natural infection and hibernation (n = 8 sample pairs/species). Gene expression by P. destructans was similar among the three host species despite varying environmental conditions among the three experiments and was similar within each host species between saprophytic contexts (superficial growth on wings) and pathogenic contexts (growth in lesions on the same wings). In contrast, we observed qualitative variation in host response: M. lucifugus and M. myotis exhibited systemic responses to infection, while E. fuscus up-regulated a remarkably localized response. Our results suggest potential phylogenetic determinants of response to WNS and can inform further studies of context-dependent host-pathogen interactions.
Collapse
Affiliation(s)
- Christina M. Davy
- Environmental and Life Sciences Program, Trent University, Peterborough, Canada
- Wildlife Research and Monitoring Section, Ontario Ministry of Natural Resources and Forestry, Peterborough, Canada
| | | | - Hana Bandouchova
- Department of Ecology and Diseases of Game, Fish and Bees, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
| | - Ana M. Breit
- Department of Biology and Centre for Forest Interdisciplinary Research (C-FIR), University of Winnipeg, Winnipeg, Canada
| | - Nicole A.S. Dorville
- Department of Biology and Centre for Forest Interdisciplinary Research (C-FIR), University of Winnipeg, Winnipeg, Canada
| | - Yvonne A. Dzal
- Department of Biology and Centre for Forest Interdisciplinary Research (C-FIR), University of Winnipeg, Winnipeg, Canada
| | - Veronika Kovacova
- Department of Ecology and Diseases of Game, Fish and Bees, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
| | - Emma L. Kunkel
- Department of Biology and Centre for Forest Interdisciplinary Research (C-FIR), University of Winnipeg, Winnipeg, Canada
| | - Natália Martínková
- Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic
| | - Kaleigh J.O. Norquay
- Department of Biology and Centre for Forest Interdisciplinary Research (C-FIR), University of Winnipeg, Winnipeg, Canada
| | - James E. Paterson
- Environmental and Life Sciences Program, Trent University, Peterborough, Canada
| | - Jan Zukal
- Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic
| | - Jiri Pikula
- Department of Ecology and Diseases of Game, Fish and Bees, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic
| | - Craig K.R. Willis
- Department of Biology and Centre for Forest Interdisciplinary Research (C-FIR), University of Winnipeg, Winnipeg, Canada
| | - Christopher J. Kyle
- Environmental and Life Sciences Program, Trent University, Peterborough, Canada
- Natural Resources DNA Profiling and Forensics Centre, Trent University, Peterborough, Canada
| |
Collapse
|
26
|
Yi X, Donner DM, Marquardt PE, Palmer JM, Jusino MA, Frair J, Lindner DL, Latch EK. Major histocompatibility complex variation is similar in little brown bats before and after white-nose syndrome outbreak. Ecol Evol 2020; 10:10031-10043. [PMID: 33005361 PMCID: PMC7520216 DOI: 10.1002/ece3.6662] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 07/18/2020] [Accepted: 07/19/2020] [Indexed: 12/28/2022] Open
Abstract
White-nose syndrome (WNS), caused by the fungal pathogen Pseudogymnoascus destructans (Pd), has driven alarming declines in North American hibernating bats, such as little brown bat (Myotis lucifugus). During hibernation, infected little brown bats are able to initiate anti-Pd immune responses, indicating pathogen-mediated selection on the major histocompatibility complex (MHC) genes. However, such immune responses may not be protective as they interrupt torpor, elevate energy costs, and potentially lead to higher mortality rates. To assess whether WNS drives selection on MHC genes, we compared the MHC DRB gene in little brown bats pre- (Wisconsin) and post- (Michigan, New York, Vermont, and Pennsylvania) WNS (detection spanning 2014-2015). We genotyped 131 individuals and found 45 nucleotide alleles (27 amino acid alleles) indicating a maximum of 3 loci (1-5 alleles per individual). We observed high allelic admixture and a lack of genetic differentiation both among sampling sites and between pre- and post-WNS populations, indicating no signal of selection on MHC genes. However, post-WNS populations exhibited decreased allelic richness, reflecting effects from bottleneck and drift following rapid population declines. We propose that mechanisms other than adaptive immunity are more likely driving current persistence of little brown bats in affected regions.
Collapse
Affiliation(s)
- Xueling Yi
- Department of Biological SciencesUniversity of Wisconsin‐MilwaukeeMilwaukeeWIUSA
| | - Deahn M. Donner
- Northern Research StationUSDA Forest ServiceRhinelanderWIUSA
| | | | | | - Michelle A. Jusino
- Northern Research StationUSDA Forest ServiceMadisonWIUSA
- Department of Plant PathologyUniversity of FloridaGainesvilleFLUSA
| | - Jacqueline Frair
- Roosevelt Wild Life StationSUNY College of Environmental Science and ForestrySyracuseNYUSA
| | | | - Emily K. Latch
- Department of Biological SciencesUniversity of Wisconsin‐MilwaukeeMilwaukeeWIUSA
| |
Collapse
|
27
|
Sun H, Wang J, Xing Y, Pan YH, Mao X. Gut transcriptomic changes during hibernation in the greater horseshoe bat ( Rhinolophus ferrumequinum). Front Zool 2020; 17:21. [PMID: 32690984 PMCID: PMC7366455 DOI: 10.1186/s12983-020-00366-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 07/10/2020] [Indexed: 11/10/2022] Open
Abstract
Background The gut is the major organ for nutrient absorption and immune response in the body of animals. Although effects of fasting on the gut functions have been extensively studied in model animals (e.g. mice), little is known about the response of the gut to fasting in a natural condition (e.g. hibernation). During hibernation, animals endure the long term of fasting and hypothermia. Results Here we generated the first gut transcriptome in a wild hibernating bat (Rhinolophus ferrumequinum). We identified 1614 differentially expressed genes (DEGs) during four physiological states (Torpor, Arousal, Winter Active and Summer Active). Gene co-expression network analysis assigns 926 DEGs into six modules associated with Torpor and Arousal. Our results reveal that in response to the stress of luminal nutrient deficiency during hibernation, the gut helps to reduce food intake by overexpressing genes (e.g. CCK and GPR17) that regulate the sensitivity to insulin and leptin. At the same time, the gut contributes energy supply by overexpressing genes that increase capacity for ketogenesis (HMGCS2) and selective autophagy (TEX264). Furthermore, we identified separate sets of multiple DEGs upregulated in Torpor and Arousal whose functions are involved in innate immunity. Conclusion This is the first gut transcriptome of a hibernating mammal. Our study identified candidate genes associated with regulation of food intake and enhance of innate immunity in the gut during hibernation. By comparing with previous studies, we found that two DEGs (CPE and HSPA8) were also significantly elevated during torpor in liver and brain of R. ferrumequinum and several DEGs (e.g. TXNIP and PDK1/4) were commonly upregulated during torpor in multiple tissues of different mammals. Our results support that shared expression changes may underlie the hibernation phenotype by most mammals.
Collapse
Affiliation(s)
- Haijian Sun
- School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200062 China
| | - Jiaying Wang
- Institute of Estuarine and Coastal Research, East China Normal University, Shanghai, 200062 China
| | - Yutong Xing
- Institute of Estuarine and Coastal Research, East China Normal University, Shanghai, 200062 China
| | - Yi-Hsuan Pan
- Key Laboratory of Brain Functional Genomics of Ministry of Education, School of Life Science, East China Normal University, Shanghai, 200062 China
| | - Xiuguang Mao
- School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200062 China.,Institute of Eco-Chongming (IEC), East China Normal University, Shanghai, 200062 China
| |
Collapse
|
28
|
Pikula J, Heger T, Bandouchova H, Kovacova V, Nemcova M, Papezikova I, Piacek V, Zajíčková R, Zukal J. Phagocyte activity reflects mammalian homeo- and hetero-thermic physiological states. BMC Vet Res 2020; 16:232. [PMID: 32631329 PMCID: PMC7339577 DOI: 10.1186/s12917-020-02450-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 06/30/2020] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Emergence of both viral zoonoses from bats and diseases that threaten bat populations has highlighted the necessity for greater insights into the functioning of the bat immune system. Particularly when considering hibernating temperate bat species, it is important to understand the seasonal dynamics associated with immune response. Body temperature is one of the factors that modulates immune functions and defence mechanisms against pathogenic agents in vertebrates. To better understand innate immunity mediated by phagocytes in bats, we measured respiratory burst and haematology and blood chemistry parameters in heterothermic greater mouse-eared bats (Myotis myotis) and noctules (Nyctalus noctula) and homeothermic laboratory mice (Mus musculus). RESULTS Bats displayed similar electrolyte levels and time-related parameters of phagocyte activity, but differed in blood profile parameters related to metabolism and red blood cell count. Greater mouse-eared bats differed from mice in all phagocyte activity parameters and had the lowest phagocytic activity overall, while noctules had the same quantitative phagocytic values as mice. Homeothermic mice were clustered separately in a high phagocyte activity group, while both heterothermic bat species were mixed in two lower phagocyte activity clusters. Stepwise regression identified glucose, white blood cell count, haemoglobin, total dissolved carbon dioxide and chloride variables as the best predictors of phagocyte activity. White blood cell counts, representing phagocyte numbers available for respiratory burst, were the best predictors of both time-related and quantitative parameters of phagocyte activity. Haemoglobin, as a proxy variable for oxygen available for uptake by phagocytes, was important for the onset of phagocytosis. CONCLUSIONS Our comparative data indicate that phagocyte activity reflects the physiological state and blood metabolic and cellular characteristics of homeothermic and heterothermic mammals. However, further studies elucidating trade-offs between immune defence, seasonal lifestyle physiology, hibernation behaviour, roosting ecology and geographic patterns of immunity of heterothermic bat species will be necessary. An improved understanding of bat immune responses will have positive ramifications for wildlife and conservation medicine.
Collapse
Affiliation(s)
- Jiri Pikula
- Department of Ecology and Diseases of Zoo Animals, Game, Fish and Bees, University of Veterinary and Pharmaceutical Sciences Brno, Palackého třída 1946/1, 612 42, Brno, Czech Republic.
- CEITEC - Central European Institute of Technology, University of Veterinary and Pharmaceutical Sciences Brno, Brno, Czech Republic.
| | - Tomas Heger
- Department of Ecology and Diseases of Zoo Animals, Game, Fish and Bees, University of Veterinary and Pharmaceutical Sciences Brno, Palackého třída 1946/1, 612 42, Brno, Czech Republic.
| | - Hana Bandouchova
- Department of Ecology and Diseases of Zoo Animals, Game, Fish and Bees, University of Veterinary and Pharmaceutical Sciences Brno, Palackého třída 1946/1, 612 42, Brno, Czech Republic
| | - Veronika Kovacova
- Department of Ecology and Diseases of Zoo Animals, Game, Fish and Bees, University of Veterinary and Pharmaceutical Sciences Brno, Palackého třída 1946/1, 612 42, Brno, Czech Republic
| | - Monika Nemcova
- Department of Ecology and Diseases of Zoo Animals, Game, Fish and Bees, University of Veterinary and Pharmaceutical Sciences Brno, Palackého třída 1946/1, 612 42, Brno, Czech Republic
| | - Ivana Papezikova
- Department of Ecology and Diseases of Zoo Animals, Game, Fish and Bees, University of Veterinary and Pharmaceutical Sciences Brno, Palackého třída 1946/1, 612 42, Brno, Czech Republic
| | - Vladimir Piacek
- Department of Ecology and Diseases of Zoo Animals, Game, Fish and Bees, University of Veterinary and Pharmaceutical Sciences Brno, Palackého třída 1946/1, 612 42, Brno, Czech Republic
| | - Renata Zajíčková
- Department of Botany and Zoology, Masaryk University, Kotlářská 2, 611 37, Brno, Czech Republic
- Institute of Biostatistics and Analyses, Masaryk University, Kamenice 3, 625 00, Brno, Czech Republic
| | - Jan Zukal
- Department of Botany and Zoology, Masaryk University, Kotlářská 2, 611 37, Brno, Czech Republic
- Institute of Vertebrate Biology, Czech Academy of Sciences, Květná 8, 603 65, Brno, Czech Republic
| |
Collapse
|
29
|
Genome-Wide Changes in Genetic Diversity in a Population of Myotis lucifugus Affected by White-Nose Syndrome. G3-GENES GENOMES GENETICS 2020; 10:2007-2020. [PMID: 32276959 PMCID: PMC7263666 DOI: 10.1534/g3.119.400966] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Novel pathogens can cause massive declines in populations, and even extirpation of hosts. But disease can also act as a selective pressure on survivors, driving the evolution of resistance or tolerance. Bat white-nose syndrome (WNS) is a rapidly spreading wildlife disease in North America. The fungus causing the disease invades skin tissues of hibernating bats, resulting in disruption of hibernation behavior, premature energy depletion, and subsequent death. We used whole-genome sequencing to investigate changes in allele frequencies within a population of Myotis lucifugus in eastern North America to search for genetic resistance to WNS. Our results show low FST values within the population across time, i.e., prior to WNS (Pre-WNS) compared to the population that has survived WNS (Post-WNS). However, when dividing the population with a geographical cut-off between the states of Pennsylvania and New York, a sharp increase in values on scaffold GL429776 is evident in the Post-WNS samples. Genes present in the diverged area are associated with thermoregulation and promotion of brown fat production. Thus, although WNS may not have subjected the entire M. lucifugus population to selective pressure, it may have selected for specific alleles in Pennsylvania through decreased gene flow within the population. However, the persistence of remnant sub-populations in the aftermath of WNS is likely due to multiple factors in bat life history.
Collapse
|
30
|
Hecht-Höger AM, Braun BC, Krause E, Meschede A, Krahe R, Voigt CC, Greenwood AD, Czirják GÁ. Plasma proteomic profiles differ between European and North American myotid bats colonized by Pseudogymnoascus destructans. Mol Ecol 2020; 29:1745-1755. [PMID: 32279365 DOI: 10.1111/mec.15437] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 03/27/2020] [Accepted: 04/01/2020] [Indexed: 12/18/2022]
Abstract
Emerging fungal diseases have become challenges for wildlife health and conservation. North American hibernating bat species are threatened by the psychrophilic fungus Pseudogymnoascus destructans (Pd) causing the disease called white-nose syndrome (WNS) with unprecedented mortality rates. The fungus is widespread in North America and Europe, however, disease is not manifested in European bats. Differences in epidemiology and pathology indicate an evolution of resistance or tolerance mechanisms towards Pd in European bats. We compared the proteomic profile of blood plasma in healthy and Pd-colonized European Myotis myotis and North American Myotis lucifugus in order to identify pathophysiological changes associated with Pd colonization, which might also explain the differences in bat survival. Expression analyses of plasma proteins revealed differences in healthy and Pd-colonized M. lucifugus, but not in M. myotis. We identified differentially expressed proteins for acute phase response, constitutive and adaptive immunity, oxidative stress defence, metabolism and structural proteins of exosomes and desmosomes, suggesting a systemic response against Pd in North American M. lucifugus but not European M. myotis. The differences in plasma proteomic profiles between European and North American bat species colonized by Pd suggest European bats have evolved tolerance mechanisms towards Pd infection.
Collapse
Affiliation(s)
| | - Beate C Braun
- Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| | - Eberhard Krause
- Leibniz Institute for Molecular Pharmacology, Berlin, Germany
| | - Angelika Meschede
- Institute of Zoology II, University of Erlangen-Nuremberg, Erlangen, Germany
| | | | - Christian C Voigt
- Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany.,Institute of Biology, Freie Universität Berlin, Berlin, Germany
| | - Alex D Greenwood
- Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany.,Department of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Gábor Á Czirják
- Leibniz Institute for Zoo and Wildlife Research, Berlin, Germany
| |
Collapse
|
31
|
Mostajo NF, Lataretu M, Krautwurst S, Mock F, Desirò D, Lamkiewicz K, Collatz M, Schoen A, Weber F, Marz M, Hölzer M. A comprehensive annotation and differential expression analysis of short and long non-coding RNAs in 16 bat genomes. NAR Genom Bioinform 2019; 2:lqz006. [PMID: 32289119 PMCID: PMC7108008 DOI: 10.1093/nargab/lqz006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 08/21/2019] [Accepted: 09/10/2019] [Indexed: 12/25/2022] Open
Abstract
Although bats are increasingly becoming the focus of scientific studies due to their unique properties, these exceptional animals are still among the least studied mammals. Assembly quality and completeness of bat genomes vary a lot and especially non-coding RNA (ncRNA) annotations are incomplete or simply missing. Accordingly, standard bioinformatics pipelines for gene expression analysis often ignore ncRNAs such as microRNAs or long antisense RNAs. The main cause of this problem is the use of incomplete genome annotations. We present a complete screening for ncRNAs within 16 bat genomes. NcRNAs affect a remarkable variety of vital biological functions, including gene expression regulation, RNA processing, RNA interference and, as recently described, regulatory processes in viral infections. Within all investigated bat assemblies, we annotated 667 ncRNA families including 162 snoRNAs and 193 miRNAs as well as rRNAs, tRNAs, several snRNAs and lncRNAs, and other structural ncRNA elements. We validated our ncRNA candidates by six RNA-Seq data sets and show significant expression patterns that have never been described before in a bat species on such a large scale. Our annotations will be usable as a resource (rna.uni-jena.de/supplements/bats) for deeper studying of bat evolution, ncRNAs repertoire, gene expression and regulation, ecology and important host–virus interactions.
Collapse
Affiliation(s)
- Nelly F Mostajo
- RNA Bioinformatics and High-Throughput Analysis, Friedrich Schiller University Jena, Leutragraben 1, 07743 Jena, Germany.,Institute of Virology, Philipps-University Marburg, Hans-Meerwein-Straße 2, 35043 Marburg, Germany.,European Virus Bioinformatics Center, Friedrich Schiller University Jena, Leutragraben 1, 07743 Jena, Germany
| | - Marie Lataretu
- RNA Bioinformatics and High-Throughput Analysis, Friedrich Schiller University Jena, Leutragraben 1, 07743 Jena, Germany.,European Virus Bioinformatics Center, Friedrich Schiller University Jena, Leutragraben 1, 07743 Jena, Germany
| | - Sebastian Krautwurst
- RNA Bioinformatics and High-Throughput Analysis, Friedrich Schiller University Jena, Leutragraben 1, 07743 Jena, Germany.,European Virus Bioinformatics Center, Friedrich Schiller University Jena, Leutragraben 1, 07743 Jena, Germany
| | - Florian Mock
- RNA Bioinformatics and High-Throughput Analysis, Friedrich Schiller University Jena, Leutragraben 1, 07743 Jena, Germany.,European Virus Bioinformatics Center, Friedrich Schiller University Jena, Leutragraben 1, 07743 Jena, Germany
| | - Daniel Desirò
- RNA Bioinformatics and High-Throughput Analysis, Friedrich Schiller University Jena, Leutragraben 1, 07743 Jena, Germany.,European Virus Bioinformatics Center, Friedrich Schiller University Jena, Leutragraben 1, 07743 Jena, Germany
| | - Kevin Lamkiewicz
- RNA Bioinformatics and High-Throughput Analysis, Friedrich Schiller University Jena, Leutragraben 1, 07743 Jena, Germany.,European Virus Bioinformatics Center, Friedrich Schiller University Jena, Leutragraben 1, 07743 Jena, Germany
| | - Maximilian Collatz
- RNA Bioinformatics and High-Throughput Analysis, Friedrich Schiller University Jena, Leutragraben 1, 07743 Jena, Germany.,European Virus Bioinformatics Center, Friedrich Schiller University Jena, Leutragraben 1, 07743 Jena, Germany
| | - Andreas Schoen
- Institute for Virology, FB10-Veterinary Medicine, Justus-Liebig University, 35392 Gießen, Germany.,German Center for Infection Research (DZIF), partner sites 35043 Marburg and 35392 Gießen, Germany
| | - Friedemann Weber
- Institute of Virology, Philipps-University Marburg, Hans-Meerwein-Straße 2, 35043 Marburg, Germany.,Institute for Virology, FB10-Veterinary Medicine, Justus-Liebig University, 35392 Gießen, Germany.,German Center for Infection Research (DZIF), partner sites 35043 Marburg and 35392 Gießen, Germany
| | - Manja Marz
- RNA Bioinformatics and High-Throughput Analysis, Friedrich Schiller University Jena, Leutragraben 1, 07743 Jena, Germany.,European Virus Bioinformatics Center, Friedrich Schiller University Jena, Leutragraben 1, 07743 Jena, Germany.,FLI Leibniz Institute for Age Research, Beutenbergstraße 11, 07745 Jena, Germany
| | - Martin Hölzer
- RNA Bioinformatics and High-Throughput Analysis, Friedrich Schiller University Jena, Leutragraben 1, 07743 Jena, Germany.,European Virus Bioinformatics Center, Friedrich Schiller University Jena, Leutragraben 1, 07743 Jena, Germany
| |
Collapse
|
32
|
Lilley TM, Prokkola JM, Blomberg AS, Paterson S, Johnson JS, Turner GG, Bartonička T, Bachorec E, Reeder DM, Field KA. Resistance is futile: RNA-sequencing reveals differing responses to bat fungal pathogen in Nearctic Myotis lucifugus and Palearctic Myotis myotis. Oecologia 2019; 191:295-309. [PMID: 31506746 PMCID: PMC6763535 DOI: 10.1007/s00442-019-04499-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 08/30/2019] [Indexed: 12/18/2022]
Abstract
Abstract Resistance and tolerance allow organisms to cope with potentially life-threatening pathogens. Recently introduced pathogens initially induce resistance responses, but natural selection favors the development of tolerance, allowing for a commensal relationship to evolve. Mycosis by Pseudogymnoascus destructans, causing white-nose syndrome (WNS) in Nearctic hibernating bats, has resulted in population declines since 2006. The pathogen, which spread from Europe, has infected species of Palearctic Myotis for a longer period. We compared ecologically relevant responses to the fungal infection in the susceptible Nearctic M. lucifugus and less susceptible Palearctic M. myotis, to uncover factors contributing to survival differences in the two species. Samples were collected from euthermic bats during arousal from hibernation, a naturally occurring phenomenon, during which transcriptional responses are activated. We compared the whole-transcriptome responses in wild bats infected with P. destructans hibernating in their natural habitat. Our results show dramatically different local transcriptional responses to the pathogen between uninfected and infected samples from the two species. Whereas we found 1526 significantly upregulated or downregulated transcripts in infected M. lucifugus, only one transcript was downregulated in M. myotis. The upregulated response pathways in M. lucifugus include immune cell activation and migration, and inflammatory pathways, indicative of an unsuccessful attempt to resist the infection. In contrast, M. myotis appears to tolerate P. destructans infection by not activating a transcriptional response. These host-microbe interactions determine pathology, contributing to WNS susceptibility, or commensalism, promoting tolerance to fungal colonization during hibernation that favors survival. Graphic abstract ![]()
Electronic supplementary material The online version of this article (10.1007/s00442-019-04499-6) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Thomas M Lilley
- Finnish Museum of Natural History, University of Helsinki, Helsinki, Finland.
- Institute of Integrative Biology, University of Liverpool, Liverpool, UK.
| | - Jenni M Prokkola
- Institute of Integrative Biology, University of Liverpool, Liverpool, UK
| | | | - Steve Paterson
- Institute of Integrative Biology, University of Liverpool, Liverpool, UK
| | - Joseph S Johnson
- Department of Biological Sciences, Ohio University, Athens, OH, USA
| | | | - Tomáš Bartonička
- Department of Botany and Zoology, Masaryk University, Brno, Czech Republic
| | - Erik Bachorec
- Department of Botany and Zoology, Masaryk University, Brno, Czech Republic
| | | | | |
Collapse
|
33
|
Larsen PA, Matocq MD. Emerging genomic applications in mammalian ecology, evolution, and conservation. J Mammal 2019. [DOI: 10.1093/jmammal/gyy184] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Affiliation(s)
- Peter A Larsen
- Department of Veterinary and Biomedical Sciences, University of Minnesota, Saint Paul, MN, USA
| | - Marjorie D Matocq
- Department of Natural Resources and Environmental Science; Program in Ecology, Evolution, and Conservation Biology, University of Nevada, Reno, NV, USA
| |
Collapse
|
34
|
Ecological Factors of Transmission, Persistence and Circulation of Pathogens In Bat Populations. FOLIA VETERINARIA 2019. [DOI: 10.2478/fv-2019-0005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Abstract
The existence of bats is crucial for all ecosystem units as they fulfil numerous ecological roles. However, they are also considered to be natural reservoirs of a wide range of zoonotic microorganisms, especially viruses. In this review article we briefly summarize current knowledge about various ecological factors that facilitate bat pathogen dispersal and about the current approaches to monitoring viral communities present within bat populations. On the basis of the cited papers, we suggest that the increased focus on complex viral populations in bats and their interactions with other populations and the environment is necessary to fully comprehend the relationship between emerging infectious diseases, the environment and their toll on human health.
Collapse
|