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Roth S, Siva-Jothy MT, Balvín O, Morrow EH, Willassen E, Reinhardt K. The evolution of female-biased genital diversity in bedbugs (Cimicidae). Evolution 2024; 78:329-341. [PMID: 38006287 DOI: 10.1093/evolut/qpad211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 11/13/2023] [Accepted: 11/23/2023] [Indexed: 11/27/2023]
Abstract
Rapid genitalia evolution is believed to be mainly driven by sexual selection. Recently, noncopulatory genital functions have been suggested to exert stronger selection pressure on female genitalia than copulatory functions. In bedbugs (Cimicidae), the impact of the copulatory function can be isolated from the noncopulatory impact. Unlike in other taxa, female copulatory organs have no function in egg-laying or waste-product expulsion. Males perform traumatic mating by piercing the female integument, thereby imposing antagonistic selection on females and suspending selection to morphologically match female genitalia. We found the location of the copulatory organ evolved rapidly, changing twice between dorsal and ventral sides, and several times along the anteroposterior and the left-right axes. Male genital length and shape varied much less, did not appear to follow the positional changes seen in females, and showed no evidence for coevolution. Female genitalia position evolved 1.5 times faster than male genital length and shape and showed little neutral or geographic signals. Instead, we propose that nonmorphological male traits, such as mating behavior, may drive female genitalia morphology in this taxon. Models of genitalia evolution may benefit from considering morphological genital responses to nonmorphological stimuli, such as male mating behavior or copulatory position.
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Affiliation(s)
- Steffen Roth
- University Museum of Bergen, University of Bergen, NO-5020 Bergen, Norway
| | - Michael T Siva-Jothy
- OAP, Department of Animal and Plant Sciences, University of Sheffield, Sheffield, United Kingdom
| | - Ondřej Balvín
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic
| | - Edward H Morrow
- Department of Environmental and Life Sciences, Karlstad University, Karlstad, Sweden
| | - Endre Willassen
- University Museum of Bergen, University of Bergen, NO-5020 Bergen, Norway
| | - Klaus Reinhardt
- Applied Zoology, Faculty of Biology, Technische Universität Dresden, Dresden, Germany
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2
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Sasínková M, Balvín O, Vandrovcová J, Massino C, Weig AR, Reinhardt K, Otti O, Bartonička T. Despite genetic isolation in sympatry, post-copulatory reproductive barriers have not evolved between bat- and human-associated common bedbugs (Cimex lectularius L.). Front Zool 2023; 20:36. [PMID: 37950221 PMCID: PMC10636883 DOI: 10.1186/s12983-023-00514-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 10/29/2023] [Indexed: 11/12/2023] Open
Abstract
BACKGROUND The common bedbug Cimex lectularius is a widespread ectoparasite on humans and bats. Two genetically isolated lineages, parasitizing either human (HL) or bat (BL) hosts, have been suggested to differentiate because of their distinct ecology. The distribution range of BL is within that of HL and bedbugs live mostly on synanthropic bat hosts. This sympatric co-occurrence predicts strong reproductive isolation at the post-copulatory level. RESULTS We tested the post-copulatory barrier in three BL and three HL populations in reciprocal crosses, using a common-garden blood diet that was novel to both lineages. We excluded pre-copulation isolation mechanisms and studied egg-laying rates after a single mating until the depletion of sperm, and the fitness of the resulting offspring. We found a higher sperm storage capability in BL, likely reflecting the different seasonal availability of HL and BL hosts. We also observed a notable variation in sperm function at the population level within lineages and significant differences in fecundity and offspring fitness between lineages. However, no difference in egg numbers or offspring fitness was observed between within- and between-lineage crosses. CONCLUSIONS Differences in sperm storage or egg-laying rates between HL and BL that we found did not affect reproductive isolation. Neither did the population-specific variation in sperm function. Overall, our results show no post-copulatory reproductive isolation between the lineages. How genetic differentiation in sympatry is maintained in the absence of a post-copulatory barrier between BL and HL remains to be investigated.
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Affiliation(s)
- Markéta Sasínková
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 21, Prague 6, Czech Republic
| | - Ondřej Balvín
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 21, Prague 6, Czech Republic
| | - Jana Vandrovcová
- Department of Botany and Zoology, Faculty of Science, Masaryk University , Kotlářská 2, 611 37, Brno, Czech Republic
| | - Christian Massino
- Applied Zoology, Department of Biology, Technische Universität Dresden, 01062, Dresden, Germany
| | - Alfons R Weig
- Genomics and Bioinformatics, University of Bayreuth, Universitätsstrasse 30, 95440, Bayreuth, Germany
| | - Klaus Reinhardt
- Applied Zoology, Department of Biology, Technische Universität Dresden, 01062, Dresden, Germany
| | - Oliver Otti
- Applied Zoology, Department of Biology, Technische Universität Dresden, 01062, Dresden, Germany
- Animal Population Ecology, Animal Ecology I, University of Bayreuth, Universitätsstrasse 30, 95440, Bayreuth, Germany
| | - Tomáš Bartonička
- Department of Botany and Zoology, Faculty of Science, Masaryk University , Kotlářská 2, 611 37, Brno, Czech Republic.
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3
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Dobson AJ, Voigt S, Kumpitsch L, Langer L, Voigt E, Ibrahim R, Dowling DK, Reinhardt K. Mitonuclear interactions shape both direct and parental effects of diet on fitness and involve a SNP in mitoribosomal 16s rRNA. PLoS Biol 2023; 21:e3002218. [PMID: 37603597 PMCID: PMC10441796 DOI: 10.1371/journal.pbio.3002218] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 06/28/2023] [Indexed: 08/23/2023] Open
Abstract
Nutrition is a primary determinant of health, but responses to nutrition vary with genotype. Epistasis between mitochondrial and nuclear genomes may cause some of this variation, but which mitochondrial loci and nutrients participate in complex gene-by-gene-by-diet interactions? Furthermore, it remains unknown whether mitonuclear epistasis is involved only in the immediate responses to changes in diet, or whether mitonuclear genotype might modulate sensitivity to variation in parental nutrition, to shape intergenerational fitness responses. Here, in Drosophila melanogaster, we show that mitonuclear epistasis shapes fitness responses to variation in dietary lipids and amino acids. We also show that mitonuclear genotype modulates the parental effect of dietary lipid and amino acid variation on offspring fitness. Effect sizes for the interactions between diet, mitogenotype, and nucleogenotype were equal to or greater than the main effect of diet for some traits, suggesting that dietary impacts cannot be understood without first accounting for these interactions. Associating phenotype to mtDNA variation in a subset of populations implicated a C/T polymorphism in mt:lrRNA, which encodes the 16S rRNA of the mitochondrial ribosome. This association suggests that directionally different responses to dietary changes can result from variants on mtDNA that do not change protein coding sequence, dependent on epistatic interactions with variation in the nuclear genome.
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Affiliation(s)
- Adam J. Dobson
- School of Molecular Biosciences, University of Glasgow, Glasgow, United Kingdom
- Applied Zoology, Faculty of Biology, Technische Universität Dresden, Dresden, Germany
| | - Susanne Voigt
- Applied Zoology, Faculty of Biology, Technische Universität Dresden, Dresden, Germany
| | - Luisa Kumpitsch
- Applied Zoology, Faculty of Biology, Technische Universität Dresden, Dresden, Germany
| | - Lucas Langer
- Applied Zoology, Faculty of Biology, Technische Universität Dresden, Dresden, Germany
| | - Emmely Voigt
- Applied Zoology, Faculty of Biology, Technische Universität Dresden, Dresden, Germany
| | - Rita Ibrahim
- School of Molecular Biosciences, University of Glasgow, Glasgow, United Kingdom
| | - Damian K. Dowling
- School of Biological Sciences, Monash University, Melbourne, Australia
| | - Klaus Reinhardt
- Applied Zoology, Faculty of Biology, Technische Universität Dresden, Dresden, Germany
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4
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Steinacker JM, van Mechelen W, Bloch W, Börjesson M, Casasco M, Wolfarth B, Knoke C, Papadopoulou T, Wendt J, Al Tunaiji H, Andresen D, Andrieieva O, Bachl N, Badtieva V, Beucher FJ, Blauwet CA, Casajus Mallen JA, Chang JH, Clénin G, Constantini N, Constantinou D, Di Luigi L, Declercq L, Doutreleau S, Drozdovska S, Duclos M, Ermolao A, Fischbach T, Fischer AN, Fossati C, Franchella J, Fulcher M, Galle JC, Gerloff C, Georgiades E, Gojanovic B, González Gross M, Grote A, Halle M, Hauner H, Herring MP, Hiura M, Holze K, Huber G, Hughes D, Hutchinson MR, Ionescu A, Janse van Rensburg DC, Jegier A, Jones N, Kappert-Gonther K, Kellerer M, Kimura Y, Kiopa A, Kladny B, Koch G, Kolle E, Kolt G, Koutedakis Y, Kress S, Kriemler S, Kröger J, Kuhn C, Laszlo R, Lehnert R, Lhuissier FJ, Lüdtke K, Makita S, Manonelles Marqueta P, März W, Micallef-Stafrace K, Miller M, Moore M, Müller E, Neunhäuserer D, Onur IR, Ööpik V, Perl M, Philippou A, Predel HG, Racinais S, Raslanas A, Reer R, Reinhardt K, Reinsberger C, Rozenstoka S, Sallis R, Sardinha LB, Scherer M, Schipperijn J, Seil R, Tan B, Schmidt-Trucksäss A, Schumacher N, Schwaab B, Schwirtz A, Suzuki M, Swart J, Tiesler R, Tippelt U, Tillet E, Thornton J, Ulkar B, Unt E, Verhagen E, Weikert T, Vettor R, Zeng S, Budgett R, Engebretsen L, Erdener U, Pigozzi F, Pitsiladis YP. Global Alliance for the Promotion of Physical Activity: the Hamburg Declaration. BMJ Open Sport Exerc Med 2023; 9:e001626. [PMID: 37533594 PMCID: PMC10391804 DOI: 10.1136/bmjsem-2023-001626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/29/2023] [Indexed: 08/04/2023] Open
Abstract
Non-communicable diseases (NCDs), including coronary heart disease, stroke, hypertension, type 2 diabetes, dementia, depression and cancers, are on the rise worldwide and are often associated with a lack of physical activity (PA). Globally, the levels of PA among individuals are below WHO recommendations. A lack of PA can increase morbidity and mortality, worsen the quality of life and increase the economic burden on individuals and society. In response to this trend, numerous organisations came together under one umbrella in Hamburg, Germany, in April 2021 and signed the 'Hamburg Declaration'. This represented an international commitment to take all necessary actions to increase PA and improve the health of individuals to entire communities. Individuals and organisations are working together as the 'Global Alliance for the Promotion of Physical Activity' to drive long-term individual and population-wide behaviour change by collaborating with all stakeholders in the community: active hospitals, physical activity specialists, community services and healthcare providers, all achieving sustainable health goals for their patients/clients. The 'Hamburg Declaration' calls on national and international policymakers to take concrete action to promote daily PA and exercise at a population level and in healthcare settings.
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Affiliation(s)
- Jürgen M Steinacker
- Division of Sports and Rehabilitation Medicine, University Hospital Ulm, Ulm, Germany
- European Initiative for Exercise in Medicine (EIEIM), Ulm, Germany
- International Federation of Sports Medicine, Fédération Internationale de Médecine du Sport (FIMS), Lausanne, Switzerland
- Institute for Rehabilitation Medicine Research at Ulm University, Institut für rehabilitationsmedizinische Forschung an der Universität Ulm, Bad Buchau, Germany
| | - Willem van Mechelen
- European Initiative for Exercise in Medicine (EIEIM), Ulm, Germany
- Department of Public and Occupational Health, location Vrije Universiteit, Amsterdam University Medical Centers, Amsterdam, Netherlands
- School of Human Movement and Nutrition Sciences, Faculty of Health and Behavioural Sciences, University of Queensland, Brisbane, Queensland, Australia
- Division of Exercise Science and Sports Medicine (ESSM), Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
- UCD School of Public Health, Physiotherapy and Sports Science, University College Dublin, Dublin, Ireland
| | - Wilhelm Bloch
- Institute for Cardiology and Sports Medicine, German Sport University, Cologne, Germany
- Exercise is Medicine Germany, Frankfurt, Germany
| | - Mats Börjesson
- European Initiative for Exercise in Medicine (EIEIM), Ulm, Germany
- Department of Molecular and Clinical Medicine, University of Gothenburg, Goteborg, Sweden
- Institute of Medicine, Sahlgrenska University Hospital, Goteborg, Region Västra Götaland, Sweden
| | | | - Bernd Wolfarth
- International Federation of Sports Medicine, Fédération Internationale de Médecine du Sport (FIMS), Lausanne, Switzerland
- Department of Sport Medicine, Humboldt University and Charité University School of Medicine, Berlin, Deutschland, Germany
- German Society for Sports Medicine and Prevention, Deutsche Gesellschaft für Sportmedizin und Prävention (DGSP), Frankfurt, Germany
| | - Carolin Knoke
- Division of Sports and Rehabilitation Medicine, University Hospital Ulm, Ulm, Germany
- European Initiative for Exercise in Medicine (EIEIM), Ulm, Germany
| | - Theodora Papadopoulou
- Defence Medical Rehabilitation Centre, Stanford Hall, Loughborough, UK
- British Association of Sport and Exercise Medicine, Doncaster, South Yorkshire, UK
| | - Janine Wendt
- Division of Sports and Rehabilitation Medicine, University Hospital Ulm, Ulm, Germany
| | - Hashel Al Tunaiji
- Sports Medicine, United Arab Emirates National Olympic Committee, Dubai, UAE
- Sports Medicine & Sciences Unit, Zayed Military University, Abu Dhabi, UAE
| | | | - Olena Andrieieva
- Department of Health, Fitness and Recreation, National University of Physical Education and Sport of Ukraine, Kiew, Ukraine
| | - Norbert Bachl
- Institute of Sports Science, University of Vienna, Vienna, Austria
- International Federation of Sports Medicine, Lausanne, Switzerland
| | - Victoriya Badtieva
- Sport Medicine, I M Sechenov First Moscow State Medical University, Moscow, Russia
- Sport Medicine, Moscow Scientific and Practical Center of Medical Rehabilitation and Sports Medicine, Moscow, Russian
| | - Friedhelm J Beucher
- National Paralympic Committee Germany (Deutscher Behindertensportverband (DBS), Bonn, Germany
| | - Cheri A Blauwet
- Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital and Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Jose-Antonio Casajus Mallen
- University of Zaragoza, GENUD “Growth, Exercise, NUtrition and Development” Research Group, Zaragoza, Spain
- Department of Physiatry and Nursing, Faculty of Health and Sport Science (FCSD), University of Zaragoza, Zaragoza, Spain
- Exercise is Medicine Spain, University of Zaragoza, Zaragoza, Spain
| | - Ju-Ho Chang
- The Association for International Sport for All (TAFISA), Frankfurt, Germany
| | - German Clénin
- Sportsmedical Centre Bern-Ittigen, Ittigen, Switzerland
- Sport and Exercise Medicine Switzerland (SEMS), Bern, Switzerland
| | - Naama Constantini
- Shaare Zedek Medical Center, Hebrew University, Jerusalem, Israel
- Exercise is Medicine Israel, Hebrew University, Jerusalem, Israel
| | - Demitri Constantinou
- Centre for Exercise Science and Sports Medicine, University of Witwatersrand, Johannesburg, South Africa
- South African Sports Medicine Association (SASMA), Pretoria, South Africa
| | - Luigi Di Luigi
- Unit of Endocrinology - Department of Movement, Human and Health Sciences, University of Rome Foro Italico, Rome, Italy
| | | | - Stephane Doutreleau
- Department of Sports Medicine, University Grenoble Alpes, Grenoble, Auvergne-Rhône-Alpes, France
- French Society of Exercise and Sports Medicine, Société Française de Médecine de l'Exercice et du Sport, Paris, France
| | - Svitlana Drozdovska
- National University of Physical Education and Sport of Ukraine, Kyiv, Ukraine
| | - Martine Duclos
- French Society of Exercise and Sports Medicine, Société Française de Médecine de l'Exercice et du Sport, Paris, France
- Department of Sport Medicine and Functional Explorations, University-Hospital (CHU), G. Montpied Hospital, Clermont-Ferrand, France
- UMR 1019, INRAE, French National Research Institute for Agriculture, Food and Environment, Clermont-Ferrand, France
| | - Andrea Ermolao
- Sports and Exercise Medicine Division, Department of Medicine, Università degli Studi di Padova, Padova, Italy
- Exercise is Medicine Italy, Università degli Studi di Padova, Padova, Italy
| | - Thomas Fischbach
- German Association of Paediatric and Adolescent Care Specialists, BVKJ - Berufsverband der Kinder- und Jugendärzte, Cologne, Germany
| | - Anastasia N Fischer
- Sports Medicine and Pediatrics, Nationwide Children's Hospital and The Ohio State University, Columbus, Ohio, USA
- American College of Sports Medicine, Indianapolis, Indiana, USA
| | - Chiara Fossati
- Faculty of Sport and Exercise Sciences, University of Rome 'Foro Italico', Roma, Lazio, Italy
| | - Jeorge Franchella
- Hospital de Clínicas José San Martin, University of Buenos Aires, Buenos Aires, Argentina
| | - Mark Fulcher
- Australasian College of Sport and Exercise Physicians, Melbourne, Victoria, Australia
- AUT Sports Performance Research Institute New Zealand, Auckland, New Zealand
| | - Jan C Galle
- German Society of Nephrology (Deutsche Gesellschaft für Nephrologie (DGfN)), Berlin, Germany
| | - Christian Gerloff
- German Society for Neurology (Deutsche Gesellschaft für Neurologie (DGN)), Berlin, Germany
| | | | - Boris Gojanovic
- Sports Medicine, Swiss Olympic Medical Center, Hopital de la Tour, Meyrin, Geneva, Switzerland
- SportAdo Consultation - Multidisciplinary Unit of Adolescent Health, University Hospital of Lausanne, Lausanne, Switzerland
| | - Marcela González Gross
- Exercise is Medicine Spain, University of Zaragoza, Zaragoza, Spain
- Department of Health and Human Performance - Facultad de CC de la Actividad Física y del Deporte, INEF Universidad Politécnica de Madrid, Madrid, Spain
| | - Andy Grote
- Senat, Freie und Hansestadt Hamburg, Hamburg, Germany
| | - Martin Halle
- European Association of Preventive Cardiology (EAPC), European Society of Cardiology (ECS), Biot, France
- Department of Prevention and Sports Medicine, Klinikum rechts der Isar, Technische Universität München, München, Germany
| | - Hans Hauner
- German Diabetes Foundation, Deutsche Diabetes Stiftung, Düsseldorf, Germany
| | | | - Mikio Hiura
- Center for Brain and Health Sciences, Aomori University, Aomori, Japan
| | - Kerstin Holze
- German Olympic Sports Confederation, Deutscher Olympischer Sportbund, Frankfurt am Main, Germany
| | - Gerhard Huber
- Institute of Sports and Sport Science, University Heidelberg, Heidelberg, Germany
- Deutscher Verband für Gesundheitssport und Sporttherapie e.V. (DVGS), Hamburg, Germany
| | - David Hughes
- Sports Medicine, Australian Institute of Sport, Canberra, Canberra, Australia
- Australian Institute of Sport, Australian Sports Commission, Canberra, Canberra, Australia
| | - Mark R. Hutchinson
- American College of Sports Medicine, Indianapolis, Indiana, USA
- Department of Orthopaedics, University of Illinois at Chicago, Chicago, Illinois, USA
- American College of Sports Medicine Foundation, Indianapolis, Indiana, USA
| | - Anca Ionescu
- European Federation of Sports Medicine Associations (EFSMA), Lausanne, Switzerland
- Carol Davila University of Medicine and Pharmacy, Bucharest, Bucharest, Romania
| | - Dina Christina Janse van Rensburg
- South African Sports Medicine Association (SASMA), Pretoria, South Africa
- Section Sports Medicine, University of Pretoria Faculty of Health Sciences, Pretoria, Gauteng, South Africa
| | - Anna Jegier
- European Federation of Sports Medicine Associations (EFSMA), Lausanne, Switzerland
- Department of Sports Medicine, Medical University of Lodz, Lodz, Poland
| | - Natasha Jones
- Moving Medicine, Faculty of Sport and Exercise Medicine UK, Edinburgh, UK
| | | | - Monika Kellerer
- German Diabetes Foundation, Deutsche Diabetes Stiftung, Düsseldorf, Germany
| | - Yutaka Kimura
- Health Science Center, Kansai Medical University, Osaka, Japan
- Exercise is Medicine Japan, Japanese Society of Physical Fitness and Sports Medicine, Osaka, Japan
| | | | - Bernd Kladny
- German Society of Orthopaedics and Trauma (Deutsche Gesellschaft für Orthopädie und Unfallchirurgie (DGOU)) with the German Society for Trauma Surgery (DGU) and German Society of Orthopaedics and Orthopaedic Surgery (DGOOC), Berlin, Germany
| | - Gerhard Koch
- Platform on Nutrition and Physical Activity, Plattform Ernährung und Bewegung e.V. (peb), Berlin, Germany
| | - Elin Kolle
- Exercise is Medicine Norway, Oslo, Norway
| | - Greg Kolt
- School of Science and Health, University of Western Sydney, Sydney, New South Wales, Australia
| | - Yiannis Koutedakis
- Exercise is Medicine Greece, National and Kapodistrian University of Athens, Athens, Greece
- School of Exercise Science and Dietetics, University of Thessaly, Trikala, Greece
| | - Stephan Kress
- German Diabetes Association (Deutsche Diabetes Gesellschaft (DDG)), Berlin, Germany
| | - Susi Kriemler
- Sport and Exercise Medicine Switzerland (SEMS), Bern, Switzerland
- Institute of Epidemiology, Biostatistics and Prevention, Zuerich University, Zuerich, Switzerland
| | - Jens Kröger
- German Diabetes Support (diabetesDE - Deutsche Diabetes-Hilfe), Charlottenburg, Germany
| | - Christian Kuhn
- German Alliance for Baths, Bäderallianz Deutschland, Köln, Germany
- International Assocation for Sport and Leisure Facilities, Köln, Germany
| | - Roman Laszlo
- German Cardiac Society (Deutsche Gesellschaft für Kardiologie – Herz- und Kreislaufforschung (DGK)), Düsseldorf, Nordrhein-Westfalen, Germany
| | - Ralph Lehnert
- Hamburg Sport Association (Hamburger Sportbund e.V.), Hamburg, Germany
| | - François J Lhuissier
- French Society of Exercise and Sports Medicine, Société Française de Médecine de l'Exercice et du Sport, Paris, France
- UMR INSERM 1272 Hypoxie et poumon, Université Sorbonne Paris Nord - Campus de Bobigny, Bobigny, France
- Hôpital Jean-Verdier, Médecine de l’exercice et du sport, Assistance Publique - Hôpitaux de Paris, Bondy, France
| | - Kerstin Lüdtke
- German Society for Physiotherapy Science (Deutsche Gesellschaft für Physiotherapiewissenschaft (DGPTW)), Hamburg, Germany
| | - Shigeru Makita
- Exercise is Medicine Japan, Japanese Society of Physical Fitness and Sports Medicine, Osaka, Japan
- Dept. of Rehabilitation, Saitama Medical University, Saitama, Japan
| | - Pedro Manonelles Marqueta
- International Federation of Sports Medicine, Lausanne, Switzerland
- Dept. of Rehabilitation, Saitama Medical University, Saitama, Japan
| | - Winfried März
- D.A.CH Society Prevention of Cardiovascular Diseases, D.A.CH-Gesellschaft Prävention von Herz-Kreislauf-Erkrankungen, Hamburg, Germany
| | - Kirill Micallef-Stafrace
- European Federation of Sports Medicine Associations (EFSMA), Lausanne, Switzerland
- University Sports Complex, Institute for Physical Education and Sport, Msida, Malta
| | - Mike Miller
- World Olympians Association (WOA), Lausanne, Switzerland
| | | | - Erich Müller
- European College of Sport Science, Köln, Germany
| | - Daniel Neunhäuserer
- Sports and Exercise Medicine Division, Department of Medicine, Università degli Studi di Padova, Padova, Italy
- Exercise is Medicine Italy, Università degli Studi di Padova, Padova, Italy
| | - I. Renay Onur
- Istanbul Spor Etkinlikleri ve Isletmeciligi A S, City of Istanbul, Istanbul, Turkey
| | - Vahur Ööpik
- Institute of Sport Sciences and Physiotherapy, Faculty of Medicine, University of Tartu, Tartu, Estonia
| | | | - Anastassios Philippou
- Exercise is Medicine Greece, National and Kapodistrian University of Athens, Athens, Greece
| | - Hans-Georg Predel
- German Hypertension League (Deutsche Hochdruckliga e.V. (DHL)), Heidelberg, Baden-Württemberg, Germany
- German Society for Hypertension and Prevention (Deutsche Gesellschaft für Hypertonie und Prävention), Heidelberg, Germany
| | - Sebastien Racinais
- Research Education Centre, ASPETAR - Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar
| | - Algirdas Raslanas
- Department of Educational Assistance, Physical and Health Education, Vytautas Magnus University, Vilnius, Lithuania
| | - Ruediger Reer
- European Initiative for Exercise in Medicine (EIEIM), Ulm, Germany
- European Federation of Sports Medicine Associations (EFSMA), Lausanne, Switzerland
- Department of Movement Science, University of Hamburg, Hamburg, Germany
| | - Klaus Reinhardt
- German Medical Association (Bundesaerztekammer), Berlin, Germany
| | - Claus Reinsberger
- German Society for Sports Medicine and Prevention, Deutsche Gesellschaft für Sportmedizin und Prävention (DGSP), Frankfurt, Germany
| | - Sandra Rozenstoka
- International Federation of Sports Medicine, Lausanne, Switzerland
- Rīga Stradiņš University, Riga, Latvia
- Sports Laboratory, Sports Medicine and Physical Health Centre, Riga, Latvia, Riga, Latvia
- Latvian Sports Medicine Association, Riga, Latvia
| | - Robert Sallis
- Family Medicine, Kaiser Permanente, Fontana, California, USA
| | - Luis B Sardinha
- Exercise is Medicine Portugal, Universidade de Lisboa, Lisboa, Portugal
- Exercise and Health Laboratory, CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisboa, Portugal
| | - Martin Scherer
- German Society of General Practice and Family Medicine (Deutsche Gesellschaft für Allgemeinmedizin und Familienmedizin (DEGAM)), Berlin, Germany
- Department of General Practice and Primary Care, University Medical Center, Hamburg, Germany
| | - Jasper Schipperijn
- International Society for Physical Activity and Health (ISPAH), Vancouver, British Columbia, Canada
| | - Romain Seil
- Society for Orthopaedic and Traumatologic Sports Medicine (GOTS), Jena, Germany
| | - Benedict Tan
- Exercise is Medicine Singapore, Singapore
- Department of Sport & Exercise Medicine, Changi General Hospital, Singapore
| | - Arno Schmidt-Trucksäss
- Division of Sports and Exercise Medicine, Department of Sport, Exercise and Health, Basel, Switzerland
| | - Nils Schumacher
- Department of Movement Science, University of Hamburg, Hamburg, Germany
| | - Bernhard Schwaab
- German Society for the Prevention and Rehabilitation of Cardiovascular Diseases (Deutsche Gesellschaft für Prävention und Rehabilitation von Herz-Kreislauferkrankungen (DGPR)), Koblenz, Germany
| | - Ansgar Schwirtz
- German Society of Sports Science, Deutsche Vereinigung für Sportwissenschaft (DVS), Frankfurt, Germany
| | - Masato Suzuki
- Exercise is Medicine Japan, Japanese Society of Physical Fitness and Sports Medicine, Osaka, Japan
| | - Jeroen Swart
- International Federation of Sports Medicine, Lausanne, Switzerland
- Health through Physical Activity, Lifestyle and Sport (HPALS) Research Centre, University of Cape Town, Cape Town, South Africa
| | - Ralph Tiesler
- Federal Institute for Sports Science (Bundesinstitut für Sportwissenschaft (BISp)), Bonn, Nordrhein-Westfalen, Germany
| | - Ulf Tippelt
- Institute for Applied Training Science Leipzig, Leipzig, Sachsen, Germany
| | - Eleanor Tillet
- British Association of Sport and Exercise Medicine, Doncaster, South Yorkshire, UK
- Division of Surgery and Interventional Science, University College London, London, UK
| | - Jane Thornton
- Public Health and Family Medicine, University of Western Ontario Schulich School of Medicine and Dentistry, London, Ontario, Canada
| | - Bulent Ulkar
- International Federation of Sports Medicine, Lausanne, Switzerland
- Sports Medicine Department, Faculty of Medicine, Ankara University, Ankara, Ankara, Turkey
| | - Eve Unt
- Department of Sports Medicine and Rehabilitation, Institute of Clinical Medicine, University of Tartu, Tartu, Estonia
| | - Evert Verhagen
- Department of Public and Occupational Health, location Vrije Universiteit, Amsterdam University Medical Centers, Amsterdam, Netherlands
| | - Thomas Weikert
- German Olympic Sports Confederation, Deutscher Olympischer Sportbund, Frankfurt am Main, Germany
| | - Roberto Vettor
- Exercise is Medicine Italy, Università degli Studi di Padova, Padova, Italy
- Department of Medicine, Università degli Studi di Padova, Padova, Italy
| | - Sheng Zeng
- International Federation of Sports Medicine, Lausanne, Switzerland
- Laboratory of Regenerative Medicine, Haikou, Hainan, China
| | | | - Lars Engebretsen
- International Olympic Committee, Lausanne, Switzerland
- Division of Orthopedic Surgery, University of Oslo, Oslo, Norway
| | - Ugur Erdener
- International Olympic Committee, Lausanne, Switzerland
| | - Fabio Pigozzi
- International Federation of Sports Medicine, Fédération Internationale de Médecine du Sport (FIMS), Lausanne, Switzerland
- Department of Movement, Human and Health Sciences, University of Rome “Foro Italico”, Rome, Italy
| | - Yannis P Pitsiladis
- International Federation of Sports Medicine, Fédération Internationale de Médecine du Sport (FIMS), Lausanne, Switzerland
- School of Sport and Health Sciences, University of Brighton, Eastbourne, UK
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5
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Asshoff R, Heuckmann B, Ryl M, Reinhardt K. "Bed bugs live in dirty places"-How Using Live Animals in Teaching Contributes to Reducing Stigma, Disgust, Psychological Stigma, and Misinformation in Students. CBE Life Sci Educ 2022; 21:ar73. [PMID: 36194505 PMCID: PMC9727609 DOI: 10.1187/cbe.22-03-0056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 08/23/2022] [Accepted: 09/01/2022] [Indexed: 06/16/2023]
Abstract
Bed bugs are on the rise and are increasingly perceived as harmful parasites. Because individuals affected by bed bugs often feel disgust and shame and are stigmatized, bed bugs are an important public health and environmental justice concern and therefore a health education issue as well. In this quasi-experimental study, we examine how different constructs, namely, forms of stigma, disgust, psychological distance, and myths about bed bugs (dependent variables), change over time (pre/posttest) in response to two forms of teaching intervention (independent variables) in upper secondary-level high school. The content of the interventions was the same, but in class, we showed live bed bugs to one group of students, assuming this would lead to a more realistic, less imaginative response to bed bugs than in the group presented with only pictures of bed bugs. Together with previous studies, we assumed that live bed bugs would be perceived as less disgusting and with a lower degree of stigmatization. Our results show that stigma, psychological distance, and myths can be reduced through intervention (regardless of live animal or picture). Disgust was more strongly reduced by live animals than by pictures. We present implications for biology education and contemporary health education.
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Affiliation(s)
- Roman Asshoff
- Centre for Biology Education, Westfälische Wilhelms-Universität, Schlossplatz 34, 48143 Münster, Germany
| | - Benedikt Heuckmann
- Centre for Biology Education, Westfälische Wilhelms-Universität, Schlossplatz 34, 48143 Münster, Germany
- Institute for Science Education, Leibniz Universität Hannover, Am Kleinen Felde 30, 30167 Hannover, Germany
| | - Mike Ryl
- Centre for Biology Education, Westfälische Wilhelms-Universität, Schlossplatz 34, 48143 Münster, Germany
| | - Klaus Reinhardt
- Faculty of Biology, Applied Zoology, TU Dresden, Zellescher Weg 20b, 01217 Dresden, Germany
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6
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Trautenberg LC, Brankatschk M, Shevchenko A, Wigby S, Reinhardt K. Ecological lipidology. eLife 2022; 11:79288. [PMID: 36069772 PMCID: PMC9451535 DOI: 10.7554/elife.79288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 08/11/2022] [Indexed: 11/13/2022] Open
Abstract
Dietary lipids (DLs), particularly sterols and fatty acids, are precursors for endogenous lipids that, unusually for macronutrients, shape cellular and organismal function long after ingestion. These functions – cell membrane structure, intracellular signalling, and hormonal activity – vary with the identity of DLs, and scale up to influence health, survival, and reproductive fitness, thereby affecting evolutionary change. Our Ecological Lipidology approach integrates biochemical mechanisms and molecular cell biology into evolution and nutritional ecology. It exposes our need to understand environmental impacts on lipidomes, the lipid specificity of cell functions, and predicts the evolution of lipid-based diet choices. Broad interdisciplinary implications of Ecological Lipidology include food web alterations, species responses to environmental change, as well as sex differences and lifestyle impacts on human nutrition, and opportunities for DL-based therapies.
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Affiliation(s)
| | - Marko Brankatschk
- Biotechnology Center (BIOTEC), Technische Universität Dresden, Dresden, Germany
| | - Andrej Shevchenko
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany
| | - Stuart Wigby
- Applied Zoology, Technische Universität Dresden, Dresden, Germany.,Department of Evolution, Ecology and Behaviour, Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, United Kingdom
| | - Klaus Reinhardt
- Applied Zoology, Technische Universität Dresden, Dresden, Germany
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7
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Turnell BR, Reinhardt K. Sperm metabolic rate predicts female mating frequency across Drosophila species. Evolution 2022; 76:573-584. [PMID: 35064568 DOI: 10.1111/evo.14435] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 11/24/2021] [Accepted: 12/15/2021] [Indexed: 01/22/2023]
Abstract
Female mating rates vary widely, even among closely related species, but the reasons for this variation are not fully understood. Across Drosophila species, female mating frequencies are positively associated with sperm length. This association may be due in part to sperm limitation, with longer-spermed species transferring fewer sperm, or to cryptic female choice. However, a previously overlooked factor is sperm metabolic rate, which may correlate with sperm length. If faster-metabolizing sperm accumulate age-related cellular damage more quickly, then females should remate sooner to obtain fresh sperm. Alternatively, frequent female mating may select for increased sperm competitiveness via increased metabolism. Here, we measure sperm metabolism across 13 Drosophila species and compare these measures to published data on female mating rate and on sperm length. Using fluorescent lifetime imaging microscopy, we quantify NAD(P)H metabolism ex vivo, in intact organs. Phylogenetically controlled regression reveals that sperm metabolic rate is positively associated with sperm length and with female mating frequency. Path analysis shows sperm length driving sperm metabolism and sperm metabolism either driving or being driven by female mating rate. While the causal directionality of these relationships remains to be fully resolved, and the effect of sperm metabolism on sperm aging and/or sperm competitiveness remains to be established, our results demonstrate the importance of sperm metabolism in sexual selection.
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Affiliation(s)
- Biz R Turnell
- Applied Zoology, Faculty Biology, Technische Universität Dresden, Dresden, Germany
| | - Klaus Reinhardt
- Applied Zoology, Faculty Biology, Technische Universität Dresden, Dresden, Germany
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8
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Dobler R, Charette M, Kaplan K, Turnell BR, Reinhardt K. Divergent natural selection alters male sperm competition success in
Drosophila melanogaster. Ecol Evol 2022; 12:e8567. [PMID: 35222953 PMCID: PMC8848461 DOI: 10.1002/ece3.8567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 12/18/2021] [Accepted: 12/30/2021] [Indexed: 11/20/2022] Open
Abstract
Sexually selected traits may also be subject to non‐sexual selection. If optimal trait values depend on environmental conditions, then “narrow sense” (i.e., non‐sexual) natural selection can lead to local adaptation, with fitness in a certain environment being highest among individuals selected under that environment. Such adaptation can, in turn, drive ecological speciation via sexual selection. To date, most research on the effect of narrow‐sense natural selection on sexually selected traits has focused on precopulatory measures like mating success. However, postcopulatory traits, such as sperm function, can also be under non‐sexual selection, and have the potential to contribute to population divergence between different environments. Here, we investigate the effects of narrow‐sense natural selection on male postcopulatory success in Drosophila melanogaster. We chose two extreme environments, low oxygen (10%, hypoxic) or high CO2 (5%, hypercapnic) to detect small effects. We measured the sperm defensive (P1) and offensive (P2) capabilities of selected and control males in the corresponding selection environment and under control conditions. Overall, selection under hypoxia decreased both P1 and P2, while selection under hypercapnia had no effect. Surprisingly, P1 for both selected and control males was higher under both ambient hypoxia and ambient hypercapnia, compared to control conditions, while P2 was lower under hypoxia. We found limited evidence for local adaptation: the positive environmental effect of hypoxia on P1 was greater in hypoxia‐selected males than in controls. We discuss the implications of our findings for the evolution of postcopulatory traits in response to non‐sexual and sexual selection.
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Affiliation(s)
- Ralph Dobler
- Animal Evolutionary Ecology Institute of Evolution and Ecology Eberhard Karls University of Tubingen Tübingen Germany
- Applied Zoology Institute of Zoology Technische Universität Dresden Dresden Germany
| | - Marc Charette
- Department of Biology University of Ottawa Ottawa Ontario Canada
| | - Katrin Kaplan
- Animal Evolutionary Ecology Institute of Evolution and Ecology Eberhard Karls University of Tubingen Tübingen Germany
| | - Biz R. Turnell
- Applied Zoology Institute of Zoology Technische Universität Dresden Dresden Germany
| | - Klaus Reinhardt
- Animal Evolutionary Ecology Institute of Evolution and Ecology Eberhard Karls University of Tubingen Tübingen Germany
- Applied Zoology Institute of Zoology Technische Universität Dresden Dresden Germany
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9
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Massino C, Wetzker C, Balvin O, Bartonicka T, Kremenova J, Sasinkova M, Otti O, Reinhardt K. Seminal fluid and sperm diluent affect sperm metabolism in an insect: Evidence from NAD(P)H and flavin adenine dinucleotide autofluorescence lifetime imaging. Microsc Res Tech 2021; 85:398-411. [PMID: 34486193 DOI: 10.1002/jemt.23914] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 07/10/2021] [Accepted: 08/13/2021] [Indexed: 12/22/2022]
Abstract
Sperm metabolism is fundamental to sperm motility and male fertility. Its measurement is still in its infancy, and recommendations do not exist as to whether or how to standardize laboratory procedures. Here, using the sperm of an insect, the common bedbug, Cimex lectularius, we demonstrate that standardization of sperm metabolism is required with respect to the artificial sperm storage medium and a natural medium, the seminal fluid. We used fluorescence lifetime imaging microscopy (FLIM) in combination with time-correlated single-photon counting (TCSPC) to quantify sperm metabolism based on the fluorescent properties of autofluorescent coenzymes, NAD(P)H and flavin adenine dinucleotide. Autofluorescence lifetimes (decay times) differ for the free and protein-bound state of the co-enzymes, and their relative contributions to the lifetime signal serve to characterize the metabolic state of cells. We found that artificial storage medium and seminal fluid separately, and additively, affected sperm metabolism. In a medium containing sugars and amino acids (Grace's Insect medium), sperm showed increased glycolysis compared with a commonly used storage medium, phosphate-buffered saline (PBS). Adding seminal fluid to the sperm additionally increased oxidative phosphorylation, likely reflecting increased energy production of sperm during activation. Our study provides a protocol to measure sperm metabolism independently from motility, stresses that protocol standardizations for sperm measurements should be implemented and, for the first time, demonstrates that seminal fluid alters sperm metabolism. Equivalent protocol standardizations should be imposed on metabolic investigations of human sperm samples.
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Affiliation(s)
- Christian Massino
- Applied Zoology, Institute of Zoology, Faculty of Biology, Technische Universität Dresden, Dresden, Germany
| | - Cornelia Wetzker
- Applied Zoology, Institute of Zoology, Faculty of Biology, Technische Universität Dresden, Dresden, Germany
- Light Microscopy Facility, CMCB, Technische Universität Dresden, Dresden, Germany
| | - Ondřej Balvin
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic
| | - Tomáš Bartonicka
- Department of Botany and Zoology, Masaryk University, Brno, Czech Republic
| | - Jana Kremenova
- Department of Botany and Zoology, Masaryk University, Brno, Czech Republic
| | - Markéta Sasinkova
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Prague, Czech Republic
| | - Oliver Otti
- Animal Population Ecology, Animal Ecology I, University of Bayreuth, Bayreuth, Germany
| | - Klaus Reinhardt
- Applied Zoology, Institute of Zoology, Faculty of Biology, Technische Universität Dresden, Dresden, Germany
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10
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Křemenová J, Bartonička T, Balvín O, Massino C, Reinhardt K, Sasínková M, Weig AR, Otti O. Male diet affects female fitness and sperm competition in human- and bat-associated lineages of the common bedbug, Cimex lectularius. Sci Rep 2021; 11:15538. [PMID: 34330972 PMCID: PMC8324850 DOI: 10.1038/s41598-021-94622-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 07/14/2021] [Indexed: 02/07/2023] Open
Abstract
Sperm performance can vary in ecologically divergent populations, but it is often not clear whether the environment per se or genomic differences arising from divergent selection cause the difference. One powerful and easily manipulated environmental effect is diet. Populations of bedbugs (Cimex lectularius) naturally feed either on bat or human blood. These are diverging genetically into a bat-associated and a human-associated lineage. To measure how male diet affects sperm performance, we kept males of two HL and BL populations each on either their own or the foreign diet. Then we investigated male reproductive success in a single mating and sperm competition context. We found that male diet affected female fecundity and changed the outcome of sperm competition, at least in the human lineage. However, this influence of diet on sperm performance was moulded by an interaction. Bat blood generally had a beneficial effect on sperm competitiveness and seemed to be a better food source in both lineages. Few studies have examined the effects of male diet on sperm performance generally, and sperm competition specifically. Our results reinforce the importance to consider the environment in which sperm are produced. In the absence of gene flow, such differences may increase reproductive isolation. In the presence of gene flow, however, the generally better sperm performance after consuming bat blood suggests that the diet is likely to homogenise rather than isolate populations.
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Affiliation(s)
- Jana Křemenová
- grid.10267.320000 0001 2194 0956Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
| | - Tomáš Bartonička
- grid.10267.320000 0001 2194 0956Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37 Brno, Czech Republic
| | - Ondřej Balvín
- grid.15866.3c0000 0001 2238 631XDepartment of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 21 Prague 6, Czech Republic
| | - Christian Massino
- grid.4488.00000 0001 2111 7257Applied Zoology, Department of Biology, Technische Universität Dresden, 01062 Dresden, Germany
| | - Klaus Reinhardt
- grid.4488.00000 0001 2111 7257Applied Zoology, Department of Biology, Technische Universität Dresden, 01062 Dresden, Germany
| | - Markéta Sasínková
- grid.15866.3c0000 0001 2238 631XDepartment of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, 165 21 Prague 6, Czech Republic
| | - Alfons R. Weig
- grid.7384.80000 0004 0467 6972Genomics and Bioinformatics, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany
| | - Oliver Otti
- grid.7384.80000 0004 0467 6972Animal Population Ecology, Animal Ecology I, University of Bayreuth, Universitätsstrasse 30, 95440 Bayreuth, Germany
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11
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Turnell BR, Kumpitsch L, Reinhardt K. Production and scavenging of reactive oxygen species both affect reproductive success in male and female Drosophila melanogaster. Biogerontology 2021; 22:379-396. [PMID: 33903991 PMCID: PMC8266701 DOI: 10.1007/s10522-021-09922-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 03/30/2021] [Indexed: 10/27/2022]
Abstract
Sperm aging is accelerated by the buildup of reactive oxygen species (ROS), which cause oxidative damage to various cellular components. Aging can be slowed by limiting the production of mitochondrial ROS and by increasing the production of antioxidants, both of which can be generated in the sperm cell itself or in the surrounding somatic tissues of the male and female reproductive tracts. However, few studies have compared the separate contributions of ROS production and ROS scavenging to sperm aging, or to cellular aging in general. We measured reproductive fitness in two lines of Drosophila melanogaster genetically engineered to (1) produce fewer ROS via expression of alternative oxidase (AOX), an alternative respiratory pathway; or (2) scavenge fewer ROS due to a loss-of-function mutation in the antioxidant gene dj-1β. Wild-type females mated to AOX males had increased fecundity and longer fertility durations, consistent with slower aging in AOX sperm. Contrary to expectations, fitness was not reduced in wild-type females mated to dj-1β males. Fecundity and fertility duration were increased in AOX and decreased in dj-1β females, indicating that female ROS levels may affect aging rates in stored sperm and/or eggs. Finally, we found evidence that accelerated aging in dj-1β sperm may have selected for more frequent mating. Our results help to clarify the relative roles of ROS production and ROS scavenging in the male and female reproductive systems.
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Affiliation(s)
- Biz R Turnell
- Applied Zoology, Faculty Biology, Technische Universität Dresden, 01069, Dresden, Germany.
| | - Luisa Kumpitsch
- Applied Zoology, Faculty Biology, Technische Universität Dresden, 01069, Dresden, Germany
| | - Klaus Reinhardt
- Applied Zoology, Faculty Biology, Technische Universität Dresden, 01069, Dresden, Germany
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12
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Turnell BR, Kumpitsch L, Ribou AC, Reinhardt K. Somatic production of reactive oxygen species does not predict its production in sperm cells across Drosophila melanogaster lines. BMC Res Notes 2021; 14:131. [PMID: 33827685 PMCID: PMC8028716 DOI: 10.1186/s13104-021-05550-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 03/30/2021] [Indexed: 01/05/2023] Open
Abstract
OBJECTIVE Sperm ageing has major evolutionary implications but has received comparatively little attention. Ageing in sperm and other cells is driven largely by oxidative damage from reactive oxygen species (ROS) generated by the mitochondria. Rates of organismal ageing differ across species and are theorized to be linked to somatic ROS levels. However, it is unknown whether sperm ageing rates are correlated with organismal ageing rates. Here, we investigate this question by comparing sperm ROS production in four lines of Drosophila melanogaster that have previously been shown to differ in somatic mitochondrial ROS production, including two commonly used wild-type lines and two lines with genetic modifications standardly used in ageing research. RESULTS Somatic ROS production was previously shown to be lower in wild-type Oregon-R than in wild-type Dahomey flies; decreased by the expression of alternative oxidase (AOX), a protein that shortens the electron transport chain; and increased by a loss-of-function mutation in dj-1β, a gene involved in ROS scavenging. Contrary to predictions, we found no differences among these four lines in the rate of sperm ROS production. We discuss the implications of our results, the limitations of our study, and possible directions for future research.
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Affiliation(s)
- Biz R Turnell
- Applied Zoology, Institute of Zoology, Technische Universität Dresden, Zellescher Weg 20b, Raum 258, 01069, Dresden, Germany.
| | - Luisa Kumpitsch
- Applied Zoology, Institute of Zoology, Technische Universität Dresden, Zellescher Weg 20b, Raum 258, 01069, Dresden, Germany
| | - Anne-Cécile Ribou
- Institut de Modélisation Et D'Analyse en Géo-Environnement Et Santé, Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, 66860, Perpignan, France
| | - Klaus Reinhardt
- Applied Zoology, Institute of Zoology, Technische Universität Dresden, Zellescher Weg 20b, Raum 258, 01069, Dresden, Germany
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13
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Abstract
Sperm quality, an important male fitness trait, is commonly compared between studies. However, few studies consider how genetic and environmental variation affect sperm quality, even in the genetic model Drosophila melanogaster. Here we show that sperm viability, the proportion of live sperm, differed across the genotypes Oregon-R, Dahomey, and Canton-S by more than 15%, and across buffers (phosphate-buffered saline (PBS), Grace's Medium and Drosophila Ringer solution) by more than 20%. In terms of genotype-buffer pair comparisons, nearly half of the comparisons would produce significant differences in sperm viability (15 in 36), or its temporal decrease in a stress medium (19 in 36). Grace's medium produced the longest-lived sperm in vitro and the smallest differences between genotypes, Drosophila Ringer Solution produced the shortest lifespan and the largest differences. Our results suggest that fly and other sperm researchers would benefit from a standardized protocol of measuring sperm viability.
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Affiliation(s)
- Ruijian Guo
- Applied Zoology, Faculty Biology , Technische Universität Dresden, Dresden, Germany
| | - Anna-Lena Henke
- Applied Zoology, Faculty Biology , Technische Universität Dresden, Dresden, Germany
| | - Klaus Reinhardt
- Applied Zoology, Faculty Biology , Technische Universität Dresden, Dresden, Germany
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14
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Křemenová J, Balvín O, Otti O, Pavonič M, Reinhardt K, Šimek Z, Bartonička T. Identification and age-dependence of pteridines in bed bugs (Cimex lectularius) and bat bugs (C. pipistrelli) using liquid chromatography-tandem mass spectrometry. Sci Rep 2020; 10:10146. [PMID: 32576867 PMCID: PMC7311437 DOI: 10.1038/s41598-020-66919-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 05/29/2020] [Indexed: 11/23/2022] Open
Abstract
Determining the age of free-living insects, particularly of blood-sucking species, is important for human health because such knowledge critically influences the estimates of biting frequency and vectoring ability. Genetic age determination is currently not available. Pteridines gradually accumulate in the eyes of insects and their concentrations is the prevailing method. Despite of their stability, published extractions differ considerably, including for standards, for mixtures of pteridines and even for light conditions. This methodological inconsistency among studies is likely to influence age estimates severely and to hamper their comparability. Therefore we reviewed methodological steps across 106 studies to identify methodological denominators and results across studies. Second, we experimentally test how different pteridines vary in their age calibration curves in, common bed (Cimex lectularius) and bat bugs (C. pipistrelli). Here we show that the accumulation of particular pteridines varied between a) different populations and b) rearing temperatures but not c) with the impact of light conditions during extraction or d) the type of blood consumed by the bugs. To optimize the extraction of pteridines and measuring concentrations, we recommend the simultaneous measurement of more than one standard and subsequently to select those that show consistent changes over time to differentiate among age cohorts.
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Affiliation(s)
- Jana Křemenová
- Masaryk University, Faculty of Sciences, Department of Botany and Zoology, Brno, 61137, Czech Republic.
| | - Ondřej Balvín
- Czech University of Life Sciences Prague, Faculty of Environmental Science, Department of Ecology, Prague, 16521, Czech Republic
| | - Oliver Otti
- Universität Bayreuth, Animal Ecology I, Animal Population Ecology, Bayreuth, 95440, Germany
| | - Michal Pavonič
- Masaryk University, Faculty of Sciences, Department of Botany and Zoology, Brno, 61137, Czech Republic
| | - Klaus Reinhardt
- Technische Universität Dresden, Department of Biology, Applied Zoology, Dresden, 01069, Germany
| | - Zdeněk Šimek
- Masaryk University, Research Centre for Toxic Compounds in the Environment, Brno, 62500, Czech Republic
| | - Tomáš Bartonička
- Masaryk University, Faculty of Sciences, Department of Botany and Zoology, Brno, 61137, Czech Republic
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15
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Turnell BR, Reinhardt K. Metabolic Rate and Oxygen Radical Levels Increase But Radical Generation Rate Decreases with Male Age in Drosophila melanogaster Sperm. J Gerontol A Biol Sci Med Sci 2020; 75:2278-2285. [DOI: 10.1093/gerona/glaa078] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Indexed: 01/17/2023] Open
Abstract
Abstract
Oxidative damage increases with age in a variety of cell types, including sperm, which are particularly susceptible to attack by reactive oxygen species (ROS). While mitochondrial respiration is the main source of cellular ROS, the relationship between the rates of aerobic metabolism and ROS production, and how this relationship may be affected by age, both in sperm and in other cell types, is unclear. Here, we investigate in Drosophila melanogaster sperm, the effects of male age on (i) the level of hydrogen peroxide in the mitochondria, using a transgenic H2O2 reporter line; (ii) the in situ rate of non-H2O2 ROS production, using a novel biophysical method; and (iii) metabolic rate, using fluorescent lifetime imaging microscopy. Sperm from older males had higher mitochondrial ROS levels and a higher metabolic rate but produced ROS at a lower rate. In comparison, a somatic tissue, the gut epithelium, also showed an age-related increase in mitochondrial ROS levels but a decrease in metabolic rate. These results support the idea of a tissue-specific optimal rate of aerobic respiration balancing the production and removal of ROS, with aging causing a shift away from this optimum and leading to increased ROS accumulation. Our findings also support the view that pathways of germline and somatic aging can be uncoupled, which may have implications for male infertility treatments.
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Affiliation(s)
- Biz R Turnell
- Applied Zoology, Faculty Biology, Technische Universität Dresden, Germany
| | - Klaus Reinhardt
- Applied Zoology, Faculty Biology, Technische Universität Dresden, Germany
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16
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Vaught RC, Voigt S, Dobler R, Clancy DJ, Reinhardt K, Dowling DK. Interactions between cytoplasmic and nuclear genomes confer sex-specific effects on lifespan in Drosophila melanogaster. J Evol Biol 2020; 33:694-713. [PMID: 32053259 DOI: 10.1111/jeb.13605] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 02/04/2020] [Accepted: 02/06/2020] [Indexed: 12/19/2022]
Abstract
Genetic variation outside of the cell nucleus can affect the phenotype. The cytoplasm is home to the mitochondria, and in arthropods often hosts intracellular bacteria such as Wolbachia. Although numerous studies have implicated epistatic interactions between cytoplasmic and nuclear genetic variation as mediators of phenotypic expression, two questions remain. Firstly, it remains unclear whether outcomes of cyto-nuclear interactions will manifest differently across the sexes, as might be predicted given that cytoplasmic genomes are screened by natural selection only through females as a consequence of their maternal inheritance. Secondly, the relative contribution of mitochondrial genetic variation to other cytoplasmic sources of variation, such as Wolbachia infection, in shaping phenotypic outcomes of cyto-nuclear interactions remains unknown. Here, we address these questions, creating a fully crossed set of replicated cyto-nuclear populations derived from three geographically distinct populations of Drosophila melanogaster, measuring the lifespan of males and females from each population. We observed that cyto-nuclear interactions shape lifespan and that the outcomes of these interactions differ across the sexes. Yet, we found no evidence that placing the cytoplasms from one population alongside the nuclear background of others (generating putative cyto-nuclear mismatches) leads to decreased lifespan in either sex. Although it was difficult to partition mitochondrial from Wolbachia effects, our results suggest at least some of the cytoplasmic genotypic contribution to lifespan was directly mediated by an effect of sequence variation in the mtDNA. Future work should explore the degree to which cyto-nuclear interactions result in sex differences in the expression of other components of organismal life history.
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Affiliation(s)
- Rebecca C Vaught
- School of Biological Sciences, Monash University, Clayton, VIC, Australia
| | - Susanne Voigt
- Faculty of Biology, Applied Zoology, TU Dresden, Dresden, Germany
| | - Ralph Dobler
- Faculty of Biology, Applied Zoology, TU Dresden, Dresden, Germany
| | - David J Clancy
- Division of Biomedical and Life Sciences, School of Health and Medicine, Lancaster University, Lancaster, UK
| | - Klaus Reinhardt
- Faculty of Biology, Applied Zoology, TU Dresden, Dresden, Germany
| | - Damian K Dowling
- School of Biological Sciences, Monash University, Clayton, VIC, Australia
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Guo R, Reinhardt K. Dietary polyunsaturated fatty acids affect volume and metabolism of Drosophila melanogaster sperm. J Evol Biol 2020; 33:544-550. [PMID: 31961473 DOI: 10.1111/jeb.13591] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 01/06/2020] [Accepted: 01/08/2020] [Indexed: 01/27/2023]
Abstract
Dietary fatty acids can accumulate in sperm and affect their function in vertebrates. As Drosophila melanogaster shares several pathways of lipid metabolism and shows similar lipid-dependent phenotypes but lacks some hormones that in vertebrates regulate lipid metabolism, there is currently no clear prediction as to how dietary fatty acids affect the sperm of D. melanogaster. We manipulated the amount and identity of dietary polyunsaturated fatty acids (PUFA) in the food of D. melanogaster males (a treatment known to affect membrane fluidity) and measured changes in sperm parameters. We found that (a) males reared on food containing PUFA-rich, plant-derived lipids showed a slower increase in sperm volume over male age compared to males reared on yeast-derived lipid food which is richer in saturated fatty acids. (b) The resistance of sperm membrane integrity to osmotic stress was not altered by dietary lipid treatment, but (c) food containing yeast-derived lipids induced a 46% higher in situ rate of production of reactive oxygen species in sperm cells. These findings show that dietary lipids have similar effects on sperm parameters in Drosophila as in vertebrates, affect some, but not all, sperm parameters and modulate male reproductive ageing. In concert with recent findings of sex-specific seasonal variation of diet choice in the wild, our results suggest a substantial dietary impact on the dynamics of male reproduction in the wild.
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Affiliation(s)
- Ruijian Guo
- Applied Zoology, Faculty Biology, Technische Universität Dresden, Dresden, Germany
| | - Klaus Reinhardt
- Applied Zoology, Faculty Biology, Technische Universität Dresden, Dresden, Germany
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Wetzker C, Reinhardt K. Distinct metabolic profiles in Drosophila sperm and somatic tissues revealed by two-photon NAD(P)H and FAD autofluorescence lifetime imaging. Sci Rep 2019; 9:19534. [PMID: 31862926 PMCID: PMC6925207 DOI: 10.1038/s41598-019-56067-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 12/03/2019] [Indexed: 12/24/2022] Open
Abstract
Metabolic profiles vary across all levels of biological diversity, from cells to taxa. Two-photon fluorescence lifetime imaging microscopy (FLIM) facilitates metabolic characterisation of biological specimens by assaying the intrinsic autofluorescence of the ubiquitous coenzymes NAD(P)H and FAD. The potential of this method for characterising the diversity of organismal metabolism remains largely untapped. Using FLIM in Drosophila melanogaster, we show tissue-specificity in fluorescence lifetime that reflects variation in redox patterns. In particular, sperm cells exhibited elevated glycolysis relative to other tissues. We also show that sperm metabolism is phenotypically plastic: compared to male-stored sperm, sperm stored in the female's storage organ showed a substantial reduction in the protein-bound FAD lifetime fraction but no change in the NAD(P)H profile. This study represents the first ex vivo investigation of sperm metabolism using FLIM.
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Affiliation(s)
- Cornelia Wetzker
- Technische Universität Dresden, Faculty Biology, Applied Zoology, D-01069, Dresden, Germany.
| | - Klaus Reinhardt
- Technische Universität Dresden, Faculty Biology, Applied Zoology, D-01069, Dresden, Germany
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Magdanz V, Boryshpolets S, Ridzewski C, Eckel B, Reinhardt K. The motility-based swim-up technique separates bull sperm based on differences in metabolic rates and tail length. PLoS One 2019; 14:e0223576. [PMID: 31600297 PMCID: PMC6786571 DOI: 10.1371/journal.pone.0223576] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 09/23/2019] [Indexed: 11/18/2022] Open
Abstract
Swim-up is a sperm purification method that is being used daily in andrology labs around the world as a simple step for in vitro sperm selection. This method accumulates the most motile sperm in the upper fraction and leaves sperm with low or no motility in the lower fraction. However, the underlying reasons are not fully understood. In this article, we compare metabolic rate, motility and sperm tail length of bovine sperm cells of the upper and lower fraction. The metabolic assay platform reveals oxygen consumption rates and extracellular acidification rates simultaneously and thereby delivers the metabolic rates in real time. Our study confirms that the upper fraction of bull sperm has not only improved motility compared to the cells in the lower fraction but also shows higher metabolic rates and longer flagella. This pattern was consistent across media of two different levels of viscosity. We conclude that the motility-based separation of the swim-up technique is also reflected in underlying metabolic differences. Metabolic assays could serve as additional or alternative, label-free method to evaluate sperm quality.
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Affiliation(s)
- Veronika Magdanz
- Chair of Applied Zoology, TU Dresden, Zellescher Weg, Dresden, Germany
- * E-mail:
| | - Sergii Boryshpolets
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrosensors Zátiší 728/II, Vodňany, Czech Republic
| | - Clara Ridzewski
- Chair of Applied Zoology, TU Dresden, Zellescher Weg, Dresden, Germany
| | - Barbara Eckel
- Chair of Applied Zoology, TU Dresden, Zellescher Weg, Dresden, Germany
| | - Klaus Reinhardt
- Chair of Applied Zoology, TU Dresden, Zellescher Weg, Dresden, Germany
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20
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Affiliation(s)
- Klaus Reinhardt
- Applied Zoology Faculty Biology Technische Universität Dresden Dresden Germany
| | - Biz Turnell
- Applied Zoology Faculty Biology Technische Universität Dresden Dresden Germany
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21
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Reinhardt K, Voigt D, Gorb SN. Evidence for a sexually selected function of the attachment system in bedbugs Cimex lectularius (Heteroptera, Cimicidae). J Exp Biol 2019; 222:jeb.206136. [PMID: 31053647 DOI: 10.1242/jeb.206136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 04/29/2019] [Indexed: 11/20/2022]
Abstract
Attachment to surfaces is a major aspect of an animal's interaction with the environment. Consequently, shaping of the attachment system in relation to weight load and substrate is considered to have occurred mainly by natural selection. However, sexual selection may also be important because many animals attach to their partner during mating. The two hypotheses generate opposing predictions in species where males are smaller than females. Natural selection predicts that attachment ability will scale positively with load, and hence body size, and so will be larger in females than males. Sexual selection predicts attachment forces in males will be larger than those in females, despite the males' smaller size because males benefit from uninterrupted copulation by stronger attachment to the female. We tested these predictions in the common bedbug Cimex lectularius, a species in which both sexes, as well as nymphs, regularly carry large loads: blood meals of up to 3 times their body weight. By measuring attachment forces to smooth surfaces and analysing in situ fixed copulating pairs and the morphology of attachment devices, we show that: (i) males generate twice the attachment force of females, despite weighing 15% less; (ii) males adhere to females during copulation using hairy tibial adhesive pads; (iii) there are more setae, and more setae per unit area, in the pads of males than in those of females but there is no difference in the shape of the tarsal setae; and (iv) there is an absence of hairy tibial attachment pads and a low attachment force in nymphs. These results are consistent with a sexually selected function of attachment in bedbugs. Controlling sperm transfer and mate guarding by attaching to females during copulation may also shape the evolution of male attachment structures in other species. More generally, we hypothesise the existence of an arms race in terms of male attachment structures and female counterparts to impede attachment, which may result in a similar evolutionary diversification to male genitalia.
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Affiliation(s)
- Klaus Reinhardt
- Applied Zoology, Faculty of Biology, Technische Universität Dresden, D-01062 Dresden, Germany .,Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK
| | - Dagmar Voigt
- Institute for Botany, Faculty of Biology, Technische Universität Dresden, D-01062 Dresden, Germany
| | - Stanislav N Gorb
- Department of Functional Morphology and Biomechanics, Zoological Institute, Christian-Albrechts-Universität zu Kiel, Am Botanischen Garten 1-9, D-24098 Kiel, Germany
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Dobler R, Dowling DK, Morrow EH, Reinhardt K. Reply: Mitochondrial replacement and its effects on human health: accounting for non-independence of data in meta-analyses. Hum Reprod Update 2019; 25:393-394. [PMID: 30855674 DOI: 10.1093/humupd/dmz010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2019] [Accepted: 02/11/2019] [Indexed: 11/14/2022] Open
Affiliation(s)
- Ralph Dobler
- Applied Zoology, Technische Universität Dresden, Zellescher Weg 20b, Dresden, Germany
| | - Damian K Dowling
- School of Biological Sciences, Monash University, Clayton, Vic., Australia
| | - Edward H Morrow
- Evolution, Behaviour and Environment Group, School of Life Sciences, University of Sussex, Brighton, UK
| | - Klaus Reinhardt
- Applied Zoology, Technische Universität Dresden, Zellescher Weg 20b, Dresden, Germany
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23
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Dobler R, Dowling DK, Morrow EH, Reinhardt K. A systematic review and meta-analysis reveals pervasive effects of germline mitochondrial replacement on components of health. Hum Reprod Update 2019; 24:519-534. [PMID: 29757366 DOI: 10.1093/humupd/dmy018] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 05/03/2018] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND Mitochondrial replacement, a form of nuclear transfer, has been proposed as a germline therapy to prevent the transmission of mitochondrial diseases. Mitochondrial replacement therapy has been licensed for clinical application in the UK, and already carried out in other countries, but little is known about negative or unintended effects on the health of offspring born using this technique. OBJECTIVE AND RATIONALE Studies in invertebrate models have used techniques that achieve mitochondrial replacement to create offspring with novel combinations of mitochondrial and nuclear genotype. These have demonstrated that the creation of novel mitochondrial-nuclear interactions can lead to alterations in offspring characteristics, such as development rates, fertility and longevity. However, it is currently unclear whether such interactions could similarly affect the outcomes of vertebrate biomedical studies, which have sought to assess the efficacy of the replacement therapy. SEARCH METHODS This systematic review addresses whether the effects of mitochondrial replacement on offspring characteristics differ in magnitude between biological (conducted on invertebrate models, with an ecological or evolutionary focus) and biomedical studies (conducted on vertebrate models, with a clinical focus). Studies were selected based on a key-word search in 'Web of Science', complemented by backward searches of reviews on the topic of mitochondrial-nuclear (mito-nuclear) interactions. In total, 43 of the resulting 116 publications identified in the search contained reliable data to estimate effect sizes of mitochondrial replacement. We found no evidence of publication bias when examining effect-size estimates across sample sizes. OUTCOMES Mitochondrial replacement consistently altered the phenotype, with significant effects at several levels of organismal performance and health, including gene expression, anatomy, metabolism and life-history. Biomedical and biological studies, while differing in the methods used to achieve mitochondrial replacement, showed only marginally significant differences in effect-size estimates (-0.233 [CI: -0.495 to -0.011]), with larger effect-size estimates in biomedical studies (0.697 [CI: 0.450-0.956]) than biological studies (0.462 [CI: 0.287-0.688]). Humans showed stronger effects than other species. Effects of mitochondrial replacement were also stronger in species with a higher basal metabolic rate. Based on our results, we conducted the first formal risk analysis of mitochondrial replacement, and conservatively estimate negative effects in at least one in every 130 resulting offspring born to the therapy. WIDER IMPLICATIONS Our findings suggest that mitochondrial replacement may routinely affect offspring characteristics across a wide array of animal species, and that such effects are likely to extend to humans. Studies in invertebrate models have confirmed mito-nuclear interactions as the underpinning cause of organismal effects following mitochondrial replacement. This therefore suggests that mito-nuclear interactions are also likely to be contributing to effects seen in biomedical studies, on vertebrate models, whose effect sizes exceeded those of biological studies. Our results advocate the use of safeguards that could offset any negative effects (defining any unintended effect as being negative) mediated by mito-nuclear interactions following mitochondrial replacement in humans, such as mitochondrial genetic matching between donor and recipient. Our results also suggest that further research into the molecular nature of mito-nuclear interactions would be beneficial in refining the clinical application of mitochondrial replacement, and in establishing what degree of variation between donor and patient mitochondrial DNA haplotypes is acceptable to ensure 'haplotype matching'.
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Affiliation(s)
- Ralph Dobler
- Applied Zoology, Technische Universität Dresden, Zellescher Weg 20b, Dresden, Germany
| | - Damian K Dowling
- School of Biological Sciences, Monash University, Clayton, Vic., Australia
| | - Edward H Morrow
- Evolution, Behaviour and Environment Group, School of Life Sciences, University of Sussex, Brighton, UK
| | - Klaus Reinhardt
- Applied Zoology, Technische Universität Dresden, Zellescher Weg 20b, Dresden, Germany
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Reinhardt K, Thomssen C, Volker H, Tilmann L, Christoph U, Susanne P, Jutta J, Joerg B, Edith W, Karl-Friedrich B, Eva Johanna K, Martina V. Abstract P4-04-03: PIK3CA mutations in breast tumor specimens in a cohort (n=791) of a multicentric study and associations to known prognostic factors and survival data. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p4-04-03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Introduction:
The PI3K/AKT/mTOR signalling pathway plays an important role in cellular processes like proliferation, apoptosis, survival and adhesion of tumor cells. It is one oft the most deregulated pathways in cancer.
In up to 30% of breast cancers, dysregulation of this pathway is reported, resulting from mutations in the PIK3CA gene that encodes the catalytic subunit (p110a). Hotspots of mutations, comprising 86 % of all observed PIK3CA-mutations, were described in exon 9 (helical domain, E542K, G > A; E545K, G > A) and exon 20 (kinase domain, H1047R, A > G). Prevalence and the prognostic impact of the PIK3CA mutations as well as the predictive value with regard to endocrine therapy are controversially discussed.
In this study we describe the prevalence of the three most frequent PIK3CA mutations in a consecutive cohort of breast cancer patients and its association to tumor characteristics, to known prognostic factors and survival data.
Methods:
The cohort consists of 1,047 patients who were newly diagnosed for non-metastatic breast cancer in one of 6 German breast centres from 2009 to 2011 and who were registered within the prospective PiA-study (Prognostic assessment in routine Application, NCT 01592825). DNA of 806 fresh frozen tumors were available for analyzation by qPCR (exon 9: C 763 and C760; exon 20: C 775).
Associations between the PIK3CA mutation status and clinical, pathological parameters were evaluated using binary logistic regression model. Survival probabilities were estimated by Kaplan-Meier-method, Log-Rank-Test and Breslow-Test. Recurrence free interval (RFI) was defined according to STEEP criteria.
Results:
Mutation status for the three most common PIK3CA mutations was available for 791 tumors. The mutation rate was 29.2%. Only two tumors harbored two mutations (C 765, C 763). Tumors with a PIK3CA mutation were significantly more frequent in HR positive tumors (32%; p=0,001), in HER2 negative tumors (31%, p=0,010) and in tumors with low or intermediate histological grade (39%; 32% resp., each p<0,001). In triple negative tumors, PIK3CA mutations were found in 13%. There was no significant association to age, menopausal status, tumor size, nodal status and uPA/PAI-1 status.
Tumors with a PIK3CA mutation showed a slightly better recurrence-free interval (93.6%, CI 93.2-94.01 vs. 90.3%, CI 89.9-90.7). We found a prognostic impact on RFI after 5 ys F/U in patients with HR-negative tumors (93% vs 71%) and those with TNBC (100% vs. 70%).
Conclusion:
PIK3CA mutations occur frequently in breast cancer tumors. We found a prognostic impact only in patients with HR-negative and TNBC tumors.
This data adds important information to the heterogeneous results of other previously published patient cohorts. In summary in our study, tumors that harbour a mutation of the PIK3CA-gene, were associated to prognostically more favorable factors and a better recurrence-free intervall.
Citation Format: Reinhardt K, Thomssen C, Volker H, Tilmann L, Christoph U, Susanne P, Jutta J, Joerg B, Edith W, Karl-Friedrich B, Eva Johanna K, Martina V. PIK3CA mutations in breast tumor specimens in a cohort (n=791) of a multicentric study and associations to known prognostic factors and survival data [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P4-04-03.
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Affiliation(s)
- K Reinhardt
- Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany; Klinikum Fürth, Fürth, Germany; St. Elisabeth & St Barbara Hospital, Halle (Saale), Germany; Medical Office Uleer, Hildesheim, Germany; St. Bernward Hospital, Hildesheim, Germany; Klinikum Hildesheim, Hildesheim, Germany; Institute of Pathology, Hospital Martha-Maria, Halle (Saale), Germany; Institute of Pathology, Klinikum Fürth, Fürth, Germany; Institute of Pathology, Hildesheim, Germany
| | - C Thomssen
- Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany; Klinikum Fürth, Fürth, Germany; St. Elisabeth & St Barbara Hospital, Halle (Saale), Germany; Medical Office Uleer, Hildesheim, Germany; St. Bernward Hospital, Hildesheim, Germany; Klinikum Hildesheim, Hildesheim, Germany; Institute of Pathology, Hospital Martha-Maria, Halle (Saale), Germany; Institute of Pathology, Klinikum Fürth, Fürth, Germany; Institute of Pathology, Hildesheim, Germany
| | - H Volker
- Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany; Klinikum Fürth, Fürth, Germany; St. Elisabeth & St Barbara Hospital, Halle (Saale), Germany; Medical Office Uleer, Hildesheim, Germany; St. Bernward Hospital, Hildesheim, Germany; Klinikum Hildesheim, Hildesheim, Germany; Institute of Pathology, Hospital Martha-Maria, Halle (Saale), Germany; Institute of Pathology, Klinikum Fürth, Fürth, Germany; Institute of Pathology, Hildesheim, Germany
| | - L Tilmann
- Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany; Klinikum Fürth, Fürth, Germany; St. Elisabeth & St Barbara Hospital, Halle (Saale), Germany; Medical Office Uleer, Hildesheim, Germany; St. Bernward Hospital, Hildesheim, Germany; Klinikum Hildesheim, Hildesheim, Germany; Institute of Pathology, Hospital Martha-Maria, Halle (Saale), Germany; Institute of Pathology, Klinikum Fürth, Fürth, Germany; Institute of Pathology, Hildesheim, Germany
| | - U Christoph
- Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany; Klinikum Fürth, Fürth, Germany; St. Elisabeth & St Barbara Hospital, Halle (Saale), Germany; Medical Office Uleer, Hildesheim, Germany; St. Bernward Hospital, Hildesheim, Germany; Klinikum Hildesheim, Hildesheim, Germany; Institute of Pathology, Hospital Martha-Maria, Halle (Saale), Germany; Institute of Pathology, Klinikum Fürth, Fürth, Germany; Institute of Pathology, Hildesheim, Germany
| | - P Susanne
- Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany; Klinikum Fürth, Fürth, Germany; St. Elisabeth & St Barbara Hospital, Halle (Saale), Germany; Medical Office Uleer, Hildesheim, Germany; St. Bernward Hospital, Hildesheim, Germany; Klinikum Hildesheim, Hildesheim, Germany; Institute of Pathology, Hospital Martha-Maria, Halle (Saale), Germany; Institute of Pathology, Klinikum Fürth, Fürth, Germany; Institute of Pathology, Hildesheim, Germany
| | - J Jutta
- Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany; Klinikum Fürth, Fürth, Germany; St. Elisabeth & St Barbara Hospital, Halle (Saale), Germany; Medical Office Uleer, Hildesheim, Germany; St. Bernward Hospital, Hildesheim, Germany; Klinikum Hildesheim, Hildesheim, Germany; Institute of Pathology, Hospital Martha-Maria, Halle (Saale), Germany; Institute of Pathology, Klinikum Fürth, Fürth, Germany; Institute of Pathology, Hildesheim, Germany
| | - B Joerg
- Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany; Klinikum Fürth, Fürth, Germany; St. Elisabeth & St Barbara Hospital, Halle (Saale), Germany; Medical Office Uleer, Hildesheim, Germany; St. Bernward Hospital, Hildesheim, Germany; Klinikum Hildesheim, Hildesheim, Germany; Institute of Pathology, Hospital Martha-Maria, Halle (Saale), Germany; Institute of Pathology, Klinikum Fürth, Fürth, Germany; Institute of Pathology, Hildesheim, Germany
| | - W Edith
- Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany; Klinikum Fürth, Fürth, Germany; St. Elisabeth & St Barbara Hospital, Halle (Saale), Germany; Medical Office Uleer, Hildesheim, Germany; St. Bernward Hospital, Hildesheim, Germany; Klinikum Hildesheim, Hildesheim, Germany; Institute of Pathology, Hospital Martha-Maria, Halle (Saale), Germany; Institute of Pathology, Klinikum Fürth, Fürth, Germany; Institute of Pathology, Hildesheim, Germany
| | - B Karl-Friedrich
- Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany; Klinikum Fürth, Fürth, Germany; St. Elisabeth & St Barbara Hospital, Halle (Saale), Germany; Medical Office Uleer, Hildesheim, Germany; St. Bernward Hospital, Hildesheim, Germany; Klinikum Hildesheim, Hildesheim, Germany; Institute of Pathology, Hospital Martha-Maria, Halle (Saale), Germany; Institute of Pathology, Klinikum Fürth, Fürth, Germany; Institute of Pathology, Hildesheim, Germany
| | - K Eva Johanna
- Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany; Klinikum Fürth, Fürth, Germany; St. Elisabeth & St Barbara Hospital, Halle (Saale), Germany; Medical Office Uleer, Hildesheim, Germany; St. Bernward Hospital, Hildesheim, Germany; Klinikum Hildesheim, Hildesheim, Germany; Institute of Pathology, Hospital Martha-Maria, Halle (Saale), Germany; Institute of Pathology, Klinikum Fürth, Fürth, Germany; Institute of Pathology, Hildesheim, Germany
| | - V Martina
- Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany; Klinikum Fürth, Fürth, Germany; St. Elisabeth & St Barbara Hospital, Halle (Saale), Germany; Medical Office Uleer, Hildesheim, Germany; St. Bernward Hospital, Hildesheim, Germany; Klinikum Hildesheim, Hildesheim, Germany; Institute of Pathology, Hospital Martha-Maria, Halle (Saale), Germany; Institute of Pathology, Klinikum Fürth, Fürth, Germany; Institute of Pathology, Hildesheim, Germany
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Tiffany K, Arnholt A, Arzumanyan D, Arzumanyan L, Barber M, Copes E, Crow T, Esser E, Kuborn A, Reinhardt K, Tiffany B, Woods A, Sahoo D. In with the Good and out with the Bad – The Role of SR‐B1 in Lowering Blood Cholesterol Levels. FASEB J 2018. [DOI: 10.1096/fasebj.2018.32.1_supplement.lb208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | | | | | - E. Copes
- Cedarburg High SchoolCedarburgWI
| | - T. Crow
- Cedarburg High SchoolCedarburgWI
| | - E. Esser
- Cedarburg High SchoolCedarburgWI
| | | | | | | | - A. Woods
- Cedarburg High SchoolCedarburgWI
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26
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Tacke M, Borggraefe I, Gerstl L, Heinen F, Vill K, Bonfert M, Bast T, Neubauer BA, Baumeister F, Baethmann M, Bentele K, Blank C, Blank HM, Bode H, Bosch F, Brandl U, Brockmann K, Dahlem P, Ernst JP, Feldmann E, Fiedler A, Gerigk M, Heß S, Hikel C, Hoffmann HG, Kieslich M, Klepper J, Kluger G, Koch H, Koch W, Korinthenberg R, Krois I, Kühne H, Kurlemann G, Mandl M, Mause U, Navratil P, Opp J, Penzien J, Prietsch V, Quattländer A, Rating D, Schara U, Shamdeen MG, Sprinz A, Wendker-Magrabi H, Stephani U, Muhle H, Straßburg HM, Töpke B, Trollmann R, Tuschen-Hofstätter E, Waltz S, Weber G, Wien FU, Wolff M, Polster T, Freitag H, Sönmez Ö, Reinhardt K, Traus M, Hoovey Z. Effects of Levetiracetam and Sulthiame on EEG in benign epilepsy with centrotemporal spikes: A randomized controlled trial. Seizure 2018; 56:115-120. [PMID: 29475094 DOI: 10.1016/j.seizure.2018.01.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 05/19/2017] [Accepted: 01/22/2018] [Indexed: 11/30/2022] Open
Abstract
PURPOSE BECTS (benign childhood epilepsy with centrotemporal spikes) is associated with characteristic EEG findings. This study examines the influence of anti-convulsive treatment on the EEG. METHODS In a randomized controlled trial including 43 children with BECTS, EEGs were performed prior to treatment with either Sulthiame or Levetiracetam as well as three times under treatment. Using the spike-wave-index, the degree of EEG pathology was quantified. The EEG before and after initiation of treatment was analyzed. Both treatment arms were compared and the EEG of the children that were to develop recurrent seizures was compared with those that were successfully treated. RESULTS Regardless of the treatment agent, the spike-wave-index was reduced significantly under treatment. There were no differences between the two treatment groups. In an additional analysis, the EEG characteristics of the children with recurrent seizures differed statistically significant from those that did not have any further seizures. CONCLUSION Both Sulthiame and Levetiracetam influence the EEG of children with BECTS. Persistent EEG pathologies are associated with treatment failures.
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Affiliation(s)
- Moritz Tacke
- Department of Pediatric Neurology, Developmental Medicine and Social Pediatrics, University of Munich, Germany.
| | - Ingo Borggraefe
- Department of Pediatric Neurology, Developmental Medicine and Social Pediatrics, University of Munich, Germany; Epilepsy Center, University of Munich, Germany
| | - Lucia Gerstl
- Department of Pediatric Neurology, Developmental Medicine and Social Pediatrics, University of Munich, Germany
| | - Florian Heinen
- Department of Pediatric Neurology, Developmental Medicine and Social Pediatrics, University of Munich, Germany
| | - Katharina Vill
- Department of Pediatric Neurology, Developmental Medicine and Social Pediatrics, University of Munich, Germany
| | - Michaela Bonfert
- Department of Pediatric Neurology, Developmental Medicine and Social Pediatrics, University of Munich, Germany
| | - Thomas Bast
- Kork Epilepsy Center, Kehl-Kork, Germany; Faculty of Medicine of the University of Freiburg, Germany
| | | | - Bernd Axel Neubauer
- Department of Neuropediatrics, Justus-Liebig-University of Giessen, Germany; Children's Hospital, Rosenheim, Germany
| | | | | | | | | | | | - Harald Bode
- University Children's Hospital, Ulm, Germany
| | | | | | | | | | | | | | | | | | - Soeren Heß
- University Children's Hospital, Halle, Germany
| | | | | | | | | | - Gerhard Kluger
- Epilepsy Center, Vogtareuth, Germany; PMU Salzburg, Austria
| | | | | | | | | | | | | | | | - Ulrike Mause
- Hoechst Children's Hospital, Frankfurt am Main, Germany
| | | | | | | | | | | | - Dietz Rating
- University Children's Hospital, Heidelberg, Germany
| | - Ulrike Schara
- Pediatric Neurology, University of Duisburg Essen, Germany
| | | | - Andreas Sprinz
- Center for Interdisciplinary Pediatric Neurology, Kempten, Germany
| | | | | | | | | | | | | | | | | | | | - Frank U Wien
- University Children's Hospital, Magdeburg, Germany
| | - Markus Wolff
- University Children's Hospital, Tübingen, Germany
| | - Tilman Polster
- Pediatric Epileptology, Mara, Bethel Epilepsy Centre, Bielefeld, Germany
| | - Hedwig Freitag
- Pediatric Epileptology, Mara, Bethel Epilepsy Centre, Bielefeld, Germany
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Eckel BA, Guo R, Reinhardt K. More Pitfalls with Sperm Viability Staining and a Viability-Based Stress Test to Characterize Sperm Quality. Front Ecol Evol 2017. [DOI: 10.3389/fevo.2017.00165] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Otti O, Deines P, Hammerschmidt K, Reinhardt K. Regular Wounding in a Natural System: Bacteria Associated With Reproductive Organs of Bedbugs and Their Quorum Sensing Abilities. Front Immunol 2017; 8:1855. [PMID: 29326722 PMCID: PMC5741697 DOI: 10.3389/fimmu.2017.01855] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 12/07/2017] [Indexed: 12/15/2022] Open
Abstract
During wounding, tissues are disrupted so that bacteria can easily enter the host and trigger a host response. Both the host response and bacterial communication can occur through quorum sensing (QS) and quorum sensing inhibition (QSI). Here, we characterize the effect of wounding on the host-associated bacterial community of the bed bug. This is a model system where the male is wounding the female during every mating. Whereas several aspects of the microbial involvement during wounding have been previously examined, it is not clear to what extent QS and QSI play a role. We find that the microbiome differs depending on mating and feeding status of female bedbugs and is specific to the location of isolation. Most organs of bedbugs harbor bacteria, which are capable of both QS and QSI signaling. By focusing on the prokaryotic quorum communication system, we provide a baseline for future research in this unique system. We advocate the bedbug system as suitable for studying the effects of bacteria on reproduction and for addressing prokaryote and eukaryote communication during wounding.
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Affiliation(s)
- Oliver Otti
- Animal and Plant Sciences, University of Sheffield, Sheffield, United Kingdom.,Animal Population Ecology, Animal Ecology I, University of Bayreuth, Bayreuth, Germany
| | - Peter Deines
- Animal and Plant Sciences, University of Sheffield, Sheffield, United Kingdom.,Zoological Institute, Christian Albrechts University Kiel, Kiel, Germany
| | - Katrin Hammerschmidt
- Animal and Plant Sciences, University of Sheffield, Sheffield, United Kingdom.,Institute of Microbiology, Christian Albrechts University Kiel, Kiel, Germany
| | - Klaus Reinhardt
- Animal and Plant Sciences, University of Sheffield, Sheffield, United Kingdom.,Applied Zoology, Department of Biology, Technische Universität Dresden, Dresden, Germany
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Abstract
The bed bug Cimex lectularius is a globally distributed human ectoparasite with fascinating biology. It has recently acquired resistance against a broad range of insecticides, causing a worldwide increase in bed bug infestations. The recent annotation of the bed bug genome revealed a full complement of neuropeptide and neuropeptide receptor genes in this species. With regard to the biology of C. lectularius, neuropeptide signaling is especially interesting because it regulates feeding, diuresis, digestion, as well as reproduction and also provides potential new targets for chemical control. To identify which neuropeptides are translated from the genome-predicted genes, we performed a comprehensive peptidomic analysis of the central nervous system of the bed bug. We identified in total 144 different peptides from 29 precursors, of which at least 67 likely present bioactive mature neuropeptides. C. lectularius corazonin and myosuppressin are unique and deviate considerably from the canonical insect consensus sequences. Several identified neuropeptides likely act as hormones, as evidenced by the occurrence of respective mass signals and immunoreactivity in neurohemal structures. Our data provide the most comprehensive peptidome of a Heteropteran species so far and in comparison suggest that a hematophageous life style does not require qualitative adaptations of the insect peptidome.
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Affiliation(s)
- Reinhard Predel
- Department for Biology, Institute for Zoology, University of Cologne , Zülpicher Straße 47b, D-50674 Cologne, Germany
| | - Susanne Neupert
- Department for Biology, Institute for Zoology, University of Cologne , Zülpicher Straße 47b, D-50674 Cologne, Germany
| | - Christian Derst
- Department for Biology, Institute for Zoology, University of Cologne , Zülpicher Straße 47b, D-50674 Cologne, Germany
| | - Klaus Reinhardt
- Applied Zoology, Department of Biology, Technical University of Dresden , Zellescher Weg 20b, D-01062 Dresden, Germany
| | - Christian Wegener
- Neurobiology and Genetics, Theodor-Boveri-Institute, Biocenter, University of Würzburg , Am Hubland, D-97074 Würzburg, Germany
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Reinhardt K, Breunig HG, König K. Autofluorescence lifetime variation in the cuticle of the bedbug Cimex lectularius. Arthropod Struct Dev 2017; 46:56-62. [PMID: 27913288 DOI: 10.1016/j.asd.2016.11.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Revised: 11/18/2016] [Accepted: 11/25/2016] [Indexed: 06/06/2023]
Abstract
The decay time of the fluorescence of excited molecules, called fluorescence lifetime, can provide information about the cuticle composition additionally to widely used spectral characteristics. We compared autofluorescence lifetimes of different cuticle regions in the copulatory organ of females of the bedbug, Cimex lectularius. After two-photon excitation at 720 nm, regions recently characterised as being rich in resilin showed a longer bimodal distribution of the mean autofluorescence lifetime τm (tau-m) at 0.4 ns and 1.0-1.5 ns, while resilin-poor sites exhibited a unimodal pattern with a peak around 0.8 ns. The mean lifetime, and particularly its second component, can be useful to distinguish resilin-rich from resilin-poor parts of the cuticle. The few existing literature data suggest that chitin is unlikely responsible for the main autofluorescent component observed in the resilin-poor areas in our study and that melanin requires further scrutiny. Autofluorescence lifetime measurements can help to characterise properties of the arthropod cuticle, especially when coupled with multiphoton excitation to allow for deeper tissue penetration.
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Affiliation(s)
- Klaus Reinhardt
- Applied Zoology, Department of Biology, Technische Universität Dresden, 01062 Dresden, Germany.
| | - Hans Georg Breunig
- JenLab GmbH, Schillerstr. 1, 07745 Jena, and Science Park 2, Campus D1.2, 66123 Saarbrücken, Germany
| | - Karsten König
- JenLab GmbH, Schillerstr. 1, 07745 Jena, and Science Park 2, Campus D1.2, 66123 Saarbrücken, Germany; Saarland University, Department of Biophotonics and Laser Technology, Campus A5.1, 66123 Saarbrücken, Germany
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32
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Reinhardt K. [Not Available]. Praxis (Bern 1994) 2016; 105:1230. [PMID: 27705191 DOI: 10.1024/1661-8157/a002498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
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Reinhardt K, Breunig HG, Uchugonova A, König K. Sperm metabolism is altered during storage by female insects: evidence from two-photon autofluorescence lifetime measurements in bedbugs. J R Soc Interface 2016; 12:0609. [PMID: 26333813 PMCID: PMC4614475 DOI: 10.1098/rsif.2015.0609] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We explore the possibility of characterizing sperm cells without the need to stain them using spectral and fluorescence lifetime analyses after multi-photon excitation in an insect model. The autofluorescence emission spectrum of sperm of the common bedbug, Cimex lectularius, was consistent with the presence of flavins and NAD(P)H. The mean fluorescence lifetimes showed smaller variation in sperm extracted from the male (tau m, τm = 1.54-1.84 ns) than in that extracted from the female sperm storage organ (tau m, τm = 1.26-2.00 ns). The fluorescence lifetime histograms revealed four peaks. These peaks (0.18, 0.92, 2.50 and 3.80 ns) suggest the presence of NAD(P)H and flavins and show that sperm metabolism can be characterized using fluorescence lifetime imaging. The difference in fluorescence lifetime variation between the sexes is consistent with the notion that female animals alter the metabolism of sperm cells during storage. It is not consistent, however, with the idea that sperm metabolism represents a sexually selected character that provides females with information about the male genotype.
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Affiliation(s)
- Klaus Reinhardt
- Department of Animal Evolutionary Ecology, University of Tuebingen, Auf der Morgenstelle 28, 27076 Tuebingen, Germany Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2TN, UK Applied Zoology, Department of Biology, Technische Universität Dresden, 01062 Dresden, Germany
| | - Hans Georg Breunig
- Department of Biophotonics and Laser Technology, Saarland University, Campus A5.1, 66123 Saarbrücken, Germany Jenlab GmbH, Schillerstrasse 1, 07745 Jena, and Science Park 2, Campus D1.2, 66123 Saarbrücken, Germany
| | - Aisada Uchugonova
- Department of Biophotonics and Laser Technology, Saarland University, Campus A5.1, 66123 Saarbrücken, Germany Jenlab GmbH, Schillerstrasse 1, 07745 Jena, and Science Park 2, Campus D1.2, 66123 Saarbrücken, Germany
| | - Karsten König
- Department of Biophotonics and Laser Technology, Saarland University, Campus A5.1, 66123 Saarbrücken, Germany Jenlab GmbH, Schillerstrasse 1, 07745 Jena, and Science Park 2, Campus D1.2, 66123 Saarbrücken, Germany
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Dobler R, Reinhardt K. Heritability, evolvability, phenotypic plasticity and temporal variation in sperm-competition success of Drosophila melanogaster. J Evol Biol 2016; 29:929-41. [PMID: 26990919 DOI: 10.1111/jeb.12858] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 03/07/2016] [Accepted: 03/08/2016] [Indexed: 11/28/2022]
Abstract
Sperm-competition success (SCS) is seen as centrally important for evolutionary change: superior fathers sire superior sons and thereby inherit the traits that make them superior. Additional hypotheses, that phenotypic plasticity in SCS and sperm ageing explain variation in paternity, are less considered. Even though various alleles have individually been shown to be correlated with variation in SCS, few studies have addressed the heritability, or evolvability, of overall SCS. Those studies that have addressed found low or no heritability and have not examined evolvability. They have further not excluded phenotypic plasticity, and temporal effects on SCS, despite their known dramatic effects on sperm function. In Drosophila melanogaster, we found that both standard components of sperm competition, sperm defence and sperm offence, showed nonsignificant heritability across several offspring cohorts. Instead, our analysis revealed, for the first time, the existence of phenotypic plasticity in SCS across an extreme environment (5% CO2 ), and an influence of sperm ageing. Evolvability of SCS was substantial for sperm defence but weak for sperm offence. Our results suggest that the paradigm of explaining evolution by sperm competition is more complex and will benefit from further experimental work on the heritability or evolvability of SCS, measuring phenotypic plasticity, and separating the effects of sperm competition and sperm ageing.
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Affiliation(s)
- R Dobler
- Department of Biology, Applied Zoology, TU Dresden, Dresden, Germany.,University of Tübingen, Institute of Evolution and Ecology, Tübingen, Germany
| | - K Reinhardt
- Department of Biology, Applied Zoology, TU Dresden, Dresden, Germany.,University of Tübingen, Institute of Evolution and Ecology, Tübingen, Germany
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36
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Reinhardt K. [Not Available]. Praxis (Bern 1994) 2016; 105:1285. [PMID: 28573957 DOI: 10.1024/1661-8157/a002514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
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Abstract
Using basic ecological concepts, we introduce sperm ecology as a framework to study sperm cells. First, we describe environmental effects on sperm and conclude that evolutionary and ecological research should not neglect the overwhelming evidence presented here (both in external and internal fertilizers and in terrestrial and aquatic habitats) that sperm function is altered by many environments, including the male environment. Second, we determine that the evidence for sperm phenotypic plasticity is overwhelming. Third, we find that genotype-by-environment interaction effects on sperm function exist, but their general adaptive significance (e.g., local adaptation) awaits further research. It remains unresolved whether sperm diversification occurs by natural selection acting on sperm function or by selection on male and female microenvironments that enable optimal plastic performance of sperm (sperm niches). Environmental effects reduce fitness predictability under sperm competition, predict species distributions under global change, explain adaptive behavior, and highlight the role of natural selection in behavioral ecology and reproductive medicine.
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Affiliation(s)
- Klaus Reinhardt
- Applied Zoology, Department of Biology, Technische Universität Dresden, 01062 Dresden, Germany;,
| | - Ralph Dobler
- Applied Zoology, Department of Biology, Technische Universität Dresden, 01062 Dresden, Germany;,
| | - Jessica Abbott
- Department of Biology, Lund University, 223 62 Lund, Sweden
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Reinhardt K. Reproduktionsmedizin. Risiken der Mitochondrien-Ersatztherapie in der Reproduktionsmedizin. Geburtshilfe Frauenheilkd 2015. [DOI: 10.1055/s-0035-1545932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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39
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Abstract
Copulatory wounding (CW) is widespread in the animal kingdom, but likely underreported because of its cryptic nature. We use four case studies (Drosophila flies, Siphopteron slugs, Cimex bugs, and Callosobruchus beetles) to show that CW entails physiological and life-history costs, but can evolve into a routine mating strategy that, in some species, involves insemination through the wound. Although interspecific variation in CW is documented, few data exist on intraspecific and none on individual differences. Although defensive mechanisms evolve in the wound recipient, our review also indicates that mating costs in species with CW are slightly higher than in other species. Whether such costs are dose- or frequency-dependent, and whether defense occurs as resistance or tolerance, decisively affects the evolutionary outcome. In addition to sexual conflict, CW may also become a model system for reproductive isolation. In this context, we put forward a number of predictions, including (1) occasional CW is more costly than routine CW, (2) CW is more costly in between- than within-population matings, and (3) in the presence of CW, selection may favor the transmission of sexually transmitted diseases if they induce resource allocation. Finally, we outline, and briefly discuss, several medical implications of CW in humans.
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Affiliation(s)
- Klaus Reinhardt
- Animal Evolutionary Ecology, Institute of Evolution and Ecology, University of Tübingen, D-72076 Tübingen, Germany
| | - Nils Anthes
- Animal Evolutionary Ecology, Institute of Evolution and Ecology, University of Tübingen, D-72076 Tübingen, Germany
| | - Rolanda Lange
- Animal Evolutionary Ecology, Institute of Evolution and Ecology, University of Tübingen, D-72076 Tübingen, Germany School of Biological Sciences, Monash University, Clayton 3800, Australia
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Morrow EH, Reinhardt K, Wolff JN, Dowling DK. Risks inherent to mitochondrial replacement. EMBO Rep 2015; 16:541-4. [PMID: 25807984 DOI: 10.15252/embr.201439110] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 03/02/2015] [Indexed: 11/09/2022] Open
Affiliation(s)
- Edward H Morrow
- Evolution, Behaviour and Environment Group, School of Life Sciences, University of Sussex, Brighton, UK
| | - Klaus Reinhardt
- Applied Zoology, Department of Biology, Technische Universitaet Dresden, Dresden, Germany
| | - Jonci N Wolff
- School of Biological Sciences, Monash University, Clayton, Vic., Australia
| | - Damian K Dowling
- School of Biological Sciences, Monash University, Clayton, Vic., Australia
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41
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Michels J, Gorb SN, Reinhardt K. Reduction of female copulatory damage by resilin represents evidence for tolerance in sexual conflict. J R Soc Interface 2015; 12:20141107. [PMID: 25673297 PMCID: PMC4345479 DOI: 10.1098/rsif.2014.1107] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Accepted: 01/16/2015] [Indexed: 12/03/2022] Open
Abstract
Intergenomic evolutionary conflicts increase biological diversity. In sexual conflict, female defence against males is generally assumed to be resistance, which, however, often leads to trait exaggeration but not diversification. Here, we address whether tolerance, a female defence mechanism known from interspecific conflicts, exists in sexual conflict. We examined the traumatic insemination of female bed bugs via cuticle penetration by males, a textbook example of sexual conflict. Confocal laser scanning microscopy revealed large proportions of the soft and elastic protein resilin in the cuticle of the spermalege, the female defence organ. Reduced tissue damage and haemolymph loss were identified as adaptive female benefits from resilin. These did not arise from resistance because microindentation showed that the penetration force necessary to breach the cuticle was significantly lower at the resilin-rich spermalege than at other cuticle sites. Furthermore, a male survival analysis indicated that the spermalege did not impose antagonistic selection on males. Our findings suggest that the specific spermalege material composition evolved to tolerate the traumatic cuticle penetration. They demonstrate the importance of tolerance in sexual conflict and genitalia evolution, extend fundamental coevolution and speciation models and contribute to explaining the evolution of complexity. We propose that tolerance can drive trait diversity.
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Affiliation(s)
- Jan Michels
- Department of Functional Morphology and Biomechanics, Institute of Zoology, Christian-Albrechts-Universität zu Kiel, Am Botanischen Garten 1-9, 24118 Kiel, Germany Biological Oceanography, GEOMAR Helmholtz Centre for Ocean Research Kiel, Düsternbrooker Weg 20, 24105 Kiel, Germany
| | - Stanislav N Gorb
- Department of Functional Morphology and Biomechanics, Institute of Zoology, Christian-Albrechts-Universität zu Kiel, Am Botanischen Garten 1-9, 24118 Kiel, Germany
| | - Klaus Reinhardt
- Applied Zoology, Department of Biology, Technische Universität Dresden, Helmholtzstraße 10, 01217 Dresden, Germany Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield S10 2TN, UK
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Fountain T, Butlin RK, Reinhardt K, Otti O. Outbreeding effects in an inbreeding insect, Cimex lectularius. Ecol Evol 2014; 5:409-18. [PMID: 25691967 PMCID: PMC4314272 DOI: 10.1002/ece3.1373] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Revised: 11/17/2014] [Accepted: 11/17/2014] [Indexed: 11/12/2022] Open
Abstract
In some species, populations with few founding individuals can be resilient to extreme inbreeding. Inbreeding seems to be the norm in the common bed bug, Cimex lectularius, a flightless insect that, nevertheless, can reach large deme sizes and persist successfully. However, bed bugs can also be dispersed passively by humans, exposing inbred populations to gene flow from genetically distant populations. The introduction of genetic variation through this outbreeding could lead to increased fitness (heterosis) or be costly by causing a loss of local adaptation or exposing genetic incompatibility between populations (outbreeding depression). Here, we addressed how inbreeding within demes and outbreeding between distant populations impact fitness over two generations in this re-emerging public health pest. We compared fitness traits of families that were inbred (mimicking reproduction following a founder event) or outbred (mimicking reproduction following a gene flow event). We found that outbreeding led to increased starvation resistance compared to inbred families, but this benefit was lost after two generations of outbreeding. No other fitness benefits of outbreeding were observed in either generation, including no differences in fecundity between the two treatments. Resilience to inbreeding is likely to result from the history of small founder events in the bed bug. Outbreeding benefits may only be detectable under stress and when heterozygosity is maximized without disruption of coadaptation. We discuss the consequences of these results both in terms of inbreeding and outbreeding in populations with genetic and spatial structuring, as well as for the recent resurgence of bed bug populations.
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Affiliation(s)
- Toby Fountain
- Animal and Plant Sciences, University of Sheffield, Western Bank Sheffield, S10 2TN, UK ; Department of Biosciences, University of Helsinki PO Box 65 (Viikinkaari 1), FI-00014, Helsinki, Finland
| | - Roger K Butlin
- Animal and Plant Sciences, University of Sheffield, Western Bank Sheffield, S10 2TN, UK ; Sven Lovén Centre - Tjärnö, University of Gothenburg SE, 452 96, Strömstad, Sweden
| | - Klaus Reinhardt
- Animal and Plant Sciences, University of Sheffield, Western Bank Sheffield, S10 2TN, UK ; Institute for Evolution and Ecology, University of Tübingen Auf der Morgenstelle 28, D-72076, Tübingen, Germany
| | - Oliver Otti
- Animal and Plant Sciences, University of Sheffield, Western Bank Sheffield, S10 2TN, UK ; Animal Population Ecology, Animal Ecology I, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth Universitätsstrasse 30, 95440, Bayreuth, Germany
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Otti O, Johnston PR, Horsburgh GJ, Galindo J, Reinhardt K. Female transcriptomic response to male genetic and nongenetic ejaculate variation. Behav Ecol 2014. [DOI: 10.1093/beheco/aru209] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
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44
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Vetter M, Reinhardt K, Stückrath K, Ditttmer J, Thomssen C, Kantelhardt EJ. Prävalenz von PIK3CA-Genmutationen beim Mammakarzinom. Geburtshilfe Frauenheilkd 2014. [DOI: 10.1055/s-0034-1388387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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45
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Ollig S, Kieback DG, Reinhardt K, Suesse A, Hamann C. Die Kolposuspension mit BSC transischiorektal – 5-Jahres Langzeitergebnisse. Geburtshilfe Frauenheilkd 2014. [DOI: 10.1055/s-0034-1388254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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46
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Reinhardt K, Stückrath K, Kantelhardt E, Thomssen C, Vetter M. Prävalenz von PIK3CA-Genmutationen beim Mammakarzinom. Geburtshilfe Frauenheilkd 2014. [DOI: 10.1055/s-0034-1376511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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47
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Fountain T, Duvaux L, Horsburgh G, Reinhardt K, Butlin RK. Human-facilitated metapopulation dynamics in an emerging pest species, Cimex lectularius. Mol Ecol 2014; 23:1071-84. [PMID: 24446663 PMCID: PMC4016754 DOI: 10.1111/mec.12673] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 01/06/2014] [Accepted: 01/13/2014] [Indexed: 12/01/2022]
Abstract
The number and demographic history of colonists can have dramatic consequences for the way in which genetic diversity is distributed and maintained in a metapopulation. The bed bug (Cimex lectularius) is a re-emerging pest species whose close association with humans has led to frequent local extinction and colonization, that is, to metapopulation dynamics. Pest control limits the lifespan of subpopulations, causing frequent local extinctions, and human-facilitated dispersal allows the colonization of empty patches. Founder events often result in drastic reductions in diversity and an increased influence of genetic drift. Coupled with restricted migration, this can lead to rapid population differentiation. We therefore predicted strong population structuring. Here, using 21 newly characterized microsatellite markers and approximate Bayesian computation (ABC), we investigate simplified versions of two classical models of metapopulation dynamics, in a coalescent framework, to estimate the number and genetic composition of founders in the common bed bug. We found very limited diversity within infestations but high degrees of structuring across the city of London, with extreme levels of genetic differentiation between infestations (FST = 0.59). ABC results suggest a common origin of all founders of a given subpopulation and that the numbers of colonists were low, implying that even a single mated female is enough to found a new infestation successfully. These patterns of colonization are close to the predictions of the propagule pool model, where all founders originate from the same parental infestation. These results show that aspects of metapopulation dynamics can be captured in simple models and provide insights that are valuable for the future targeted control of bed bug infestations.
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Affiliation(s)
- Toby Fountain
- Department of Animal and Plant Sciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK; Department of Biosciences, University of Helsinki, PO Box 65 (Viikinkaari 1), FI-00014, Helsinki, Finland
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Reinhardt K, Weiss S, Rosenbauer J, Gärtner J, von Kries R. Multiple sclerosis in children and adolescents: incidence and clinical picture - new insights from the nationwide German surveillance (2009-2011). Eur J Neurol 2014; 21:654-9. [DOI: 10.1111/ene.12371] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Accepted: 12/17/2013] [Indexed: 11/27/2022]
Affiliation(s)
- K. Reinhardt
- Division of Pediatric Neurology; Department of Pediatrics and Adolescent Medicine; University Medicine Göttingen; Göttingen Germany
| | - S. Weiss
- Division of Epidemiology; Institute of Social Pediatrics and Adolescent Medicine; Ludwig-Maximilians University Munich; Munich Germany
| | - J. Rosenbauer
- German Diabetes Center; Institute for Biometrics and Epidemiology; Leibniz Institute for Diabetes Research; Heinrich Heine University Düsseldorf; Düsseldorf Germany
| | - J. Gärtner
- Division of Pediatric Neurology; Department of Pediatrics and Adolescent Medicine; University Medicine Göttingen; Göttingen Germany
| | - R. von Kries
- Division of Epidemiology; Institute of Social Pediatrics and Adolescent Medicine; Ludwig-Maximilians University Munich; Munich Germany
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49
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Maroz A, Stachorski L, Emmrich S, Reinhardt K, Xu J, Shao Z, Käbler S, Dertmann T, Hitzler J, Roberts I, Vyas P, Juban G, Hennig C, Hansen G, Li Z, Orkin S, Reinhardt D, Klusmann JH. GATA1s induces hyperproliferation of eosinophil precursors in Down syndrome transient leukemia. Leukemia 2013; 28:1259-70. [PMID: 24336126 PMCID: PMC4047213 DOI: 10.1038/leu.2013.373] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Revised: 12/01/2013] [Accepted: 12/03/2013] [Indexed: 02/06/2023]
Abstract
Transient leukemia (TL) is evident in 5–10% of all neonates with Down syndrome (DS) and associated with N-terminal truncating GATA1-mutations (GATA1s). Here we report that TL cell clones generate abundant eosinophils in a substantial fraction of patients. Sorted eosinophils from patients with TL and eosinophilia carried the same GATA1s-mutation as sorted TL-blasts, consistent with their clonal origin. TL-blasts exhibited a genetic program characteristic of eosinophils and differentiated along the eosinophil lineage in vitro. Similarly, ectopic expression of Gata1s, but not Gata1, in wild-type CD34+-hematopoietic stem and progenitor cells induced hyperproliferation of eosinophil promyelocytes in vitro. While GATA1s retained the function of GATA1 to induce eosinophil genes by occupying their promoter regions, GATA1s was impaired in its ability to repress oncogenic MYC and the pro-proliferative E2F transcription network. ChIP-seq indicated reduced GATA1s occupancy at the MYC promoter. Knockdown of MYC, or the obligate E2F-cooperation partner DP1, rescued the GATA1s-induced hyperproliferative phenotype. In agreement, terminal eosinophil maturation was blocked in Gata1Δe2 knockin mice, exclusively expressing Gata1s, leading to accumulation of eosinophil precursors in blood and bone marrow. These data suggest a direct relationship between the N-terminal truncating mutations of GATA1 and clonal eosinophilia in DS patients.
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Affiliation(s)
- A Maroz
- Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany
| | - L Stachorski
- Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany
| | - S Emmrich
- Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany
| | - K Reinhardt
- Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany
| | - J Xu
- 1] Division of Hematology/Oncology, Boston Children's Hospital, Boston, MA, USA [2] Howard Hughes Medical Institute, Harvard Medical School, Boston, MA, USA [3] Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Z Shao
- 1] Division of Hematology/Oncology, Boston Children's Hospital, Boston, MA, USA [2] Howard Hughes Medical Institute, Harvard Medical School, Boston, MA, USA [3] Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - S Käbler
- Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany
| | - T Dertmann
- Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany
| | - J Hitzler
- Division of Hematology/Oncology, Department of Pediatrics, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - I Roberts
- Oxford University Department of Paediatrics, Childrens Hospital and Molecular Haematology Unit, Weatherall Institute of Molecular Medicine, John Radcliffe Hospital, UK
| | - P Vyas
- 1] MRC Molecular Haematology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK [2] Department of Haematology, Oxford University Hospital, NHS Trust, Oxford, UK
| | - G Juban
- 1] MRC Molecular Haematology Unit, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK [2] Department of Haematology, Oxford University Hospital, NHS Trust, Oxford, UK
| | - C Hennig
- Department of Pediatric Pneumology, Hannover Medical School, Hannover, Germany
| | - G Hansen
- Department of Pediatric Pneumology, Hannover Medical School, Hannover, Germany
| | - Z Li
- Division of Genetics, Brigham & Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - S Orkin
- 1] Division of Hematology/Oncology, Boston Children's Hospital, Boston, MA, USA [2] Howard Hughes Medical Institute, Harvard Medical School, Boston, MA, USA [3] Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - D Reinhardt
- Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany
| | - J-H Klusmann
- Department of Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany
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50
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Reinhardt K. The Entomological Institute of the Waffen-SS: evidence for offensive biological warfare research in the third Reich. Endeavour 2013; 37:220-227. [PMID: 23787226 DOI: 10.1016/j.endeavour.2013.05.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2012] [Revised: 04/18/2013] [Accepted: 05/07/2013] [Indexed: 06/02/2023]
Abstract
In January 1942, Heinrich Himmler, head of the Schutzstaffel (SS) and police in Nazi Germany, ordered the creation of an entomological institute to study the physiology and control of insects that inflict harm to humans. Founded in the grounds of the concentration camp at Dachau, it has been the focus of previous research, notably into the question of whether it was involved in biological warfare research. This article examines research protocols by the appointed leader Eduard May, presented here for the first time, which confirm the existence of an offensive biological warfare research programme in Nazi Germany.
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Affiliation(s)
- Klaus Reinhardt
- University of Tuebingen, Animal Evolutionary Ecology, Auf der Morgenstelle 28, 72076 Tuebingen, Germany.
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