27 results on '"Svensk, Emma"'
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2. Från hissen till dissent: en djupdykning i ”Cancel Culture” : En kvalitativ innehållsanalys av Margaux Dietz krishantering
- Author
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Sundqvist, Amanda, Svensk, Emma, Sundqvist, Amanda, and Svensk, Emma
- Abstract
Problemformulering och syfte: Fenomenet cancel culture är något som har växt fram under de senaste åren, och utspelar sig främst på sociala medier. Detta betyder att individer eller grupper av människor tar ett kollektivt beslut att bojkotta den person, företag eller organisation som anses ha gjort något stötande eller oacceptabelt. Cancel culture har blivit enallt mer normal form av social bestraffning. Syftet med studien är att utforska hur Margaux hanterade sin kriskommunikation genom video-skandalen och hur hon bemöter CancelCulture klimatet. Genom att undersöka olika kommunikationsstrategier, respons på kritik, användning av sociala medier och långsiktiga effekter på varumärke och karriär, syftar studien till att ge insikter i hur Cancel Culture påverkar samhället och influencern Margauxliv. Metod och Material: Undersökningen är en kvalitativ innehållsanalys med ett kodschemasom består av fem stycken inlägg från Margaux Dietz Instagram. Där har kommentarerna kodats. Det har även gjorts en transkribering av den dokumentär som släpptes i samband med den kris som uppstod. Huvudresultat: I denna kvalitativa forskning framgår det att kommentarerna på Margauxs Instagram-inlägg visar hur användarnas beteende och reaktioner förändrades under och efter skandalen. Samt hur Margaux använde sig av olika strategier för att hantera sin image.
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- 2024
3. Aggression in Group-Housed Male Mice: A Systematic Review
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Weber, Elin M., primary, Zidar, Josefina, additional, Ewaldsson, Birgit, additional, Askevik, Kaisa, additional, Udén, Eva, additional, Svensk, Emma, additional, and Törnqvist, Elin, additional
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- 2022
- Full Text
- View/download PDF
4. The Current Status and Work of Three Rs Centres and Platforms in Europe*
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Neuhaus, Winfried, primary, Reininger-Gutmann, Birgit, additional, Rinner, Beate, additional, Plasenzotti, Roberto, additional, Wilflingseder, Doris, additional, De Kock, Joery, additional, Vanhaecke, Tamara, additional, Rogiers, Vera, additional, Jírová, Dagmar, additional, Kejlová, Kristina, additional, Knudsen, Lisbeth E., additional, Nielsen, Rasmus Normann, additional, Kleuser, Burkhard, additional, Kral, Vivian, additional, Thöne-Reineke, Christa, additional, Hartung, Thomas, additional, Pallocca, Giorgia, additional, Rovida, Costanza, additional, Leist, Marcel, additional, Hippenstiel, Stefan, additional, Lang, Annemarie, additional, Retter, Ida, additional, Krämer, Stephanie, additional, Jedlicka, Peter, additional, Ameli, Katharina, additional, Fritsche, Ellen, additional, Tigges, Julia, additional, Kuchovská, Eliška, additional, Buettner, Manuela, additional, Bleich, Andre, additional, Baumgart, Nadine, additional, Baumgart, Jan, additional, Meinhardt, Marcus W., additional, Spanagel, Rainer, additional, Chourbaji, Sabine, additional, Kränzlin, Bettina, additional, Seeger, Bettina, additional, von Köckritz-Blickwede, Maren, additional, Sánchez-Morgado, José M., additional, Galligioni, Viola, additional, Ruiz-Pérez, Daniel, additional, Movia, Dania, additional, Prina-Mello, Adriele, additional, Ahluwalia, Arti, additional, Chiono, Valeria, additional, Gutleb, Arno C., additional, Schmit, Marthe, additional, van Golen, Bea, additional, van Weereld, Leane, additional, Kienhuis, Anne, additional, van Oort, Erica, additional, van der Valk, Jan, additional, Smith, Adrian, additional, Roszak, Joanna, additional, Stępnik, Maciej, additional, Sobańska, Zuzanna, additional, Reszka, Edyta, additional, Olsson, I. Anna S., additional, Franco, Nuno Henrique, additional, Sevastre, Bogdan, additional, Kandarova, Helena, additional, Capdevila, Sara, additional, Johansson, Jessica, additional, Svensk, Emma, additional, Cederroth, Christopher R., additional, Sandström, Jenny, additional, Ragan, Ian, additional, Bubalo, Nataliia, additional, Kurreck, Jens, additional, and Spielmann, Horst, additional
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- 2022
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5. The Current Status and Work of Three Rs Centres and Platforms in Europe*
- Author
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Neuhaus, Winfried, Reininger-Gutmann, Birgit, Rinner, Beate, Plasenzotti, Roberto, Wilflingseder, Doris, De Kock, Joery, Vanhaecke, Tamara, Rogiers, Vera, Jírová, Dagmar, Kejlová, Kristina, Knudsen, Lisbeth E., Nielsen, Rasmus Normann, Kleuser, Burkhard, Kral, Vivian, Thöne-Reineke, Christa, Hartung, Thomas, Pallocca, Giorgia, Rovida, Costanza, Leist, Marcel, Hippenstiel, Stefan, Lang, Annemarie, Retter, Ida, Krämer, Stephanie, Jedlicka, Peter, Ameli, Katharina, Fritsche, Ellen, Tigges, Julia, Kuchovská, Eliška, Buettner, Manuela, Bleich, Andre, Baumgart, Nadine, Baumgart, Jan, Meinhardt, Marcus W., Spanagel, Rainer, Chourbaji, Sabine, Kränzlin, Bettina, Seeger, Bettina, von Köckritz-Blickwede, Maren, Sánchez-Morgado, José M., Galligioni, Viola, Ruiz-Pérez, Daniel, Movia, Dania, Prina-Mello, Adriele, Ahluwalia, Arti, Chiono, Valeria, Gutleb, Arno C., Schmit, Marthe, van Golen, Bea, van Weereld, Leane, Kienhuis, Anne, van Oort, Erica, van der Valk, Jan, Smith, Adrian, Roszak, Joanna, Stępnik, Maciej, Sobańska, Zuzanna, Reszka, Edyta, Olsson, I. Anna S., Franco, Nuno Henrique, Sevastre, Bogdan, Kandarova, Helena, Capdevila, Sara, Johansson, Jessica, Svensk, Emma, Cederroth, Christopher R., Sandström, Jenny, Ragan, Ian, Bubalo, Nataliia, Kurreck, Jens, Spielmann, Horst, Neuhaus, Winfried, Reininger-Gutmann, Birgit, Rinner, Beate, Plasenzotti, Roberto, Wilflingseder, Doris, De Kock, Joery, Vanhaecke, Tamara, Rogiers, Vera, Jírová, Dagmar, Kejlová, Kristina, Knudsen, Lisbeth E., Nielsen, Rasmus Normann, Kleuser, Burkhard, Kral, Vivian, Thöne-Reineke, Christa, Hartung, Thomas, Pallocca, Giorgia, Rovida, Costanza, Leist, Marcel, Hippenstiel, Stefan, Lang, Annemarie, Retter, Ida, Krämer, Stephanie, Jedlicka, Peter, Ameli, Katharina, Fritsche, Ellen, Tigges, Julia, Kuchovská, Eliška, Buettner, Manuela, Bleich, Andre, Baumgart, Nadine, Baumgart, Jan, Meinhardt, Marcus W., Spanagel, Rainer, Chourbaji, Sabine, Kränzlin, Bettina, Seeger, Bettina, von Köckritz-Blickwede, Maren, Sánchez-Morgado, José M., Galligioni, Viola, Ruiz-Pérez, Daniel, Movia, Dania, Prina-Mello, Adriele, Ahluwalia, Arti, Chiono, Valeria, Gutleb, Arno C., Schmit, Marthe, van Golen, Bea, van Weereld, Leane, Kienhuis, Anne, van Oort, Erica, van der Valk, Jan, Smith, Adrian, Roszak, Joanna, Stępnik, Maciej, Sobańska, Zuzanna, Reszka, Edyta, Olsson, I. Anna S., Franco, Nuno Henrique, Sevastre, Bogdan, Kandarova, Helena, Capdevila, Sara, Johansson, Jessica, Svensk, Emma, Cederroth, Christopher R., Sandström, Jenny, Ragan, Ian, Bubalo, Nataliia, Kurreck, Jens, and Spielmann, Horst
- Abstract
The adoption of Directive 2010/63/EU on the protection of animals used for scientific purposes has given a major push to the formation of Three Rs initiatives in the form of centres and platforms. These centres and platforms are dedicated to the so-called Three Rs, which are the Replacement, Reduction and Refinement of animal use in experiments. ATLA’s 50th Anniversary year has seen the publication of two articles on European Three Rs centres and platforms. The first of these was about the progressive rise in their numbers and about their founding history; this second part focuses on their current status and activities. This article takes a closer look at their financial and organisational structures, describes their Three Rs focus and core activities (dissemination, education, implementation, scientific quality/translatability, ethics), and presents their areas of responsibility and projects in detail. This overview of the work and diverse structures of the Three Rs centres and platforms is not only intended to bring them closer to the reader, but also to provide role models and show examples of how such Three Rs centres and platforms could be made sustainable. The Three Rs centres and platforms are very important focal points and play an immense role as facilitators of Directive 2010/63/EU ‘on the ground’ in their respective countries. They are also invaluable for the wide dissemination of information and for promoting the implementation of the Three Rs in general., The adoption of Directive 2010/63/EU on the protection of animals used for scientific purposes has given a major push to the formation of Three Rs initiatives in the form of centres and platforms. These centres and platforms are dedicated to the so-called Three Rs, which are the Replacement, Reduction and Refinement of animal use in experiments. ATLA’s 50th Anniversary year has seen the publication of two articles on European Three Rs centres and platforms. The first of these was about the progressive rise in their numbers and about their founding history; this second part focuses on their current status and activities. This article takes a closer look at their financial and organisational structures, describes their Three Rs focus and core activities (dissemination, education, implementation, scientific quality/translatability, ethics), and presents their areas of responsibility and projects in detail. This overview of the work and diverse structures of the Three Rs centres and platforms is not only intended to bring them closer to the reader, but also to provide role models and show examples of how such Three Rs centres and platforms could be made sustainable. The Three Rs centres and platforms are very important focal points and play an immense role as facilitators of Directive 2010/63/EU ‘on the ground’ in their respective countries. They are also invaluable for the wide dissemination of information and for promoting the implementation of the Three Rs in general.
- Published
- 2022
6. Aggression in Group-Housed Male Mice: A Systematic Review.
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Weber, Elin M., Zidar, Josefina, Ewaldsson, Birgit, Askevik, Kaisa, Udén, Eva, Svensk, Emma, and Törnqvist, Elin
- Subjects
ANIMAL aggression ,ENVIRONMENTAL enrichment ,ANIMAL welfare ,GROUP formation ,MICE - Abstract
Simple Summary: When male mice are kept in groups at animal facilities, aggressive interactions between cage mates are not uncommon. Systematically reviewing previous studies that explored the cause of male mice aggression, we found that studies were disparate, using several different strains, a diverse set of environmental enrichments and different ways of grouping and housing mice, as well as different ways to observe aggression. Understanding the cause of male mice aggression is difficult when researchers use different methods and study designs. Nevertheless, our results suggest that home cage aggression is best studied in home cage environments and not by introducing unfamiliar mice to each other in a novel environment. In addition, while we were able to provide recommendations on how to minimize aggression, our assessment was that there is no universal solution that could be used by all animal facilities. Instead, it is important to realize that aggression is complex and that animal facilities might have to try different possible solutions to find what works best under their specific conditions. Aggression among group-housed male mice is a major animal welfare concern often observed at animal facilities. Studies designed to understand the causes of male mice aggression have used different methodological approaches and have been heterogeneous, using different strains, environmental enrichments, housing conditions, group formations and durations. By conducting a systematic literature review based on 198 observed conclusions from 90 articles, we showed that the methodological approach used to study aggression was relevant for the outcome and suggested that home cage observations were better when studying home cage aggression than tests provoking aggression outside the home cage. The study further revealed that aggression is a complex problem; one solution will not be appropriate for all animal facilities and all research projects. Recommendations were provided on promising tools to minimize aggression, based on the results, which included what type of environmental enrichments could be appropriate and which strains of male mice were less likely to be aggressive. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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7. Leveraging a gain-of-function allele of Caenorhabditis elegans paqr-1 to elucidate membrane homeostasis by PAQR proteins
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Busayavalasa, Kiran, primary, Ruiz, Mario, additional, Devkota, Ranjan, additional, Ståhlman, Marcus, additional, Bodhicharla, Rakesh, additional, Svensk, Emma, additional, Hermansson, Nils-Olov, additional, Borén, Jan, additional, and Pilon, Marc, additional
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- 2020
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8. Information vid inskrivning i grundsärskola och gymnasiesärskola : Om den information vårdnadshavare får kring möjligheter och begränsningar vid val av skolform
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Andersson, Hanna and Svensk, Emma
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gymnasiesärskola ,intellektuell funktionsnedsättning ,Pedagogy ,grundsärskola ,Pedagogik ,mottagande ,normkritik ,Social Sciences ,Samhällsvetenskap ,Educational Sciences ,Utbildningsvetenskap - Abstract
Syftet med denna kvalitativa studie var att undersöka hur vårdnadshavare uppfattar och förstår den information de får gällande deras barn när de utreds för mottagande i grundsärskolan eller gymnasiesärskolan. Nio halvstrukturerade telefonintervjuer genomfördes med vårdnadshavare till barn och ungdomar på grundsärskolan och gymnasiesärskolan. Intervjuerna transkriberades ordagrant och bearbetades genom temaanalys. Ett normkritiskt perspektiv har tillämpats i analysprocessen. Resultatet visar att den informationen vårdnadshavare fått kring deras barns lärande och utveckling samt framtidsutsikter vad gäller utbildning och sysselsättning, inför barnens inskrivning i grundsärskolan eller gymnasiesärskolan upplevdes som bristfällig bland respondenterna. Information om grundsärskolan och gymnasiesärskolan som skolform hade vårdnadshavare till stor del själva sökt reda på själva, vilket enligt flera respondenter varit en påfrestande process. Vidare visar resultatet att de respondenter som hade ungdomar på gymnasiesärskolan saknade kunskap och information om de möjligheter och begränsningar för arbete och fortsatta studier som gällde för deras barn efter avslutad utbildning. Enligt respondenterna borde sådan information komma tidigare för att underlätta beslut och vägval kring barnets framtid samt för att öka barnets möjligheter till delaktighet och medbestämmande i beslut som rör deras livssituation. Därtill indikerar resultatet att det verkar råda oklarheter kring vem som ska tillhandahålla information till vårdnadshavare samt var vårdnadshavare kan vända sig med frågor som rör barnets utbildning. Övergripande konstateras att merparten av respondenterna var nöjda med barnens skolgång i grundsärskolan och gymnasiesärskolan, då de såg att barnen trivdes där, samt att de fick de anpassningar de behövde för att lärmiljön skulle uppfattas som god. Emellertid efterfrågar vårdnadshavarna bättre samordning mellan de ansvariga instanserna när frågan om ett barn ska placeras i grundsärskolan eller gymnasiesärskolan aktualiseras.
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- 2020
9. PAQR-2 may be a regulator of membrane fluidity during cold adaptation
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Pilon, Marc and Svensk, Emma
- Published
- 2013
10. Evolutionarily conserved long-chain Acyl-CoA synthetases regulate membrane composition and fluidity
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Ruiz, Mario, primary, Bodhicharla, Rakesh, additional, Ståhlman, Marcus, additional, Svensk, Emma, additional, Busayavalasa, Kiran, additional, Palmgren, Henrik, additional, Ruhanen, Hanna, additional, Boren, Jan, additional, and Pilon, Marc, additional
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- 2019
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11. Group and Single Housing of Male Mice: Collected Experiences from Research Facilities in Sweden
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Zidar, Josefina, primary, Weber, Elin M., additional, Ewaldsson, Birgit, additional, Tjäder, Solveig, additional, Lilja, Josefin, additional, Mount, James, additional, Svensson, Camilla I., additional, Svensk, Emma, additional, Udén, Eva, additional, and Törnqvist, Elin, additional
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- 2019
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12. Author response: Evolutionarily conserved long-chain Acyl-CoA synthetases regulate membrane composition and fluidity
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Ruiz, Mario, primary, Bodhicharla, Rakesh, additional, Ståhlman, Marcus, additional, Svensk, Emma, additional, Busayavalasa, Kiran, additional, Palmgren, Henrik, additional, Ruhanen, Hanna, additional, Boren, Jan, additional, and Pilon, Marc, additional
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- 2019
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13. Group and Single Housing of Male Mice : Collected Experiences from Research Facilities in Sweden
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Zidar, Josefina, Weber, Elin M., Ewaldsson, Birgit, Tjäder, Solveig, Lilja, Josefin, Mount, James, Svensson, Camilla I., Svensk, Emma, Udén, Eva, Törnqvist, Elin, Zidar, Josefina, Weber, Elin M., Ewaldsson, Birgit, Tjäder, Solveig, Lilja, Josefin, Mount, James, Svensson, Camilla I., Svensk, Emma, Udén, Eva, and Törnqvist, Elin
- Abstract
Animals used for scientific purposes are protected by EU legislation. Social animals should be kept in stable groups that enable species-typical social behavior and provide individuals with social comfort. However, when group-housing male mice, aggression within the homecage is a common husbandry and welfare problem. Excessive fighting and injuries due to aggression can cause pain and stress, resulting in individuals being euthanized or housed individually. In addition, stress can alter physiological parameters, risking scientific validity and generating larger sample sizes. Mouse aggression, and the consequences thereof, thus opposes the 3R goals of Refining the methods to minimize potential pain and suffering and Reducing the number of animals used. Animal technicians, veterinarians, and scientists using animals have valuable information on how these problems are experienced and handled in practice. We assembled these experiences from laboratory animal facilities in Sweden, mapping problems observed and identifying strategies used to prevent mouse aggression. In line with current literature, less aggression was perceived if mice were grouped before sexual maturity, re-grouping avoided and nesting material transferred at cage cleaning. Preventing aggression will minimize pain and suffering and enable housing of stable groups, leading to more reliable scientific outcomes and is thus of high 3Rs relevance.
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- 2019
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14. Membrane fluidity is regulated by the C. elegans transmembrane protein FLD-1 and its human homologs TLCD1/2
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Ruiz, Mario, primary, Bodhicharla, Rakesh, additional, Svensk, Emma, additional, Devkota, Ranjan, additional, Busayavalasa, Kiran, additional, Palmgren, Henrik, additional, Ståhlman, Marcus, additional, Boren, Jan, additional, and Pilon, Marc, additional
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- 2018
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15. Author response: Membrane fluidity is regulated by the C. elegans transmembrane protein FLD-1 and its human homologs TLCD1/2
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Ruiz, Mario, primary, Bodhicharla, Rakesh, additional, Svensk, Emma, additional, Devkota, Ranjan, additional, Busayavalasa, Kiran, additional, Palmgren, Henrik, additional, Ståhlman, Marcus, additional, Boren, Jan, additional, and Pilon, Marc, additional
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- 2018
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16. Endometrios påverkan på kvinnors livskvalitet
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Järryd, Maria and Svensk, Emma
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Personcentrerad vård ,Endometrios ,Omvårdnad ,Livskvalitet ,Nursing ,Lidande ,Smärta - Abstract
Endometrios är en kronisk sjukdom som drabbar tio procent av världens kvinnor i fertil ålder. Sjukdomen går i skov och orsakar smärta och lidande för de drabbade, något som påverkar det dagliga livet och livskvaliteten. Sjuksköterskan har ett professionellt ansvar att uppmärksamma och respektfullt bemöta dessa unika individers omvårdnadsbehov utifrån ett personcentrerat förhållningssätt. Sjukdomen har en negativ inverkan på kvinnors livskvalitet och orsakar lidande, där bristfällig vård medför en fördröjd diagnos på upp till tio år. För att öka livskvaliteten krävs en lyhörd vård som tar kvinnor på allvar och arbetar utifrån ett personcentrerat förhållningssätt.
- Published
- 2017
17. Leveraging the withered tail tip phenotype in C. elegans to identify proteins that influence membrane properties
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Svensk, Emma, Biermann, Jana, Hammarsten, Sofia, Magnusson, Fredrik, and Pilon, Marc
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iglr-2 ,paqr-2 ,spectrin ,C. elegans ,membrane ,AP2 ,Research Paper ,forward genetics - Abstract
The properties of cellular membranes are critical for most cellular functions and are influenced by several parameters including phospholipid composition, integral and peripheral membrane proteins, and environmental conditions such as temperature. We previously showed that the C. elegans paqr-2 and iglr-2 mutants have a defect in membrane homeostasis and exhibit several distinct phenotypes, including a characteristic tail tip defect and cold intolerance. In the present study we report that screening for novel mutants with these 2 defects can lead to the identification of genes that are important contributors to membrane properties. In particular we isolated 3 novel alleles of sma-1, the C. elegans homolog of βH spectrin, and 2 novel alleles of dpy-23, which encodes the C. elegans homolog of the AP2 μ subunit. We also show that sma-1 and dpy-23 act on membrane properties in pathways distinct from that of paqr-2 and iglr-2.
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- 2016
18. C. elegans PAQR-2 ‒ A Regulator of Membrane Homeostasis
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Svensk, Emma
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LRRIG ,membrane fluidity ,homeoviscous adaptation ,glucose ,PAQR ,desaturase - Abstract
The progestin and adipoQ receptor (PAQR) protein family is characterized by a 7-transmembrane domain, and a topology reversed that of G-protein coupled receptors, i.e. the N-terminus resides in the cytoplasm. Despite the presence of this class of receptors in humans, as well as in the established model organisms, the intracellular signaling pathway has not been adequately elucidated. The most extensively researched PAQR proteins are the mammalian adiponectin receptors, ADIPOR1/2, which mediate the insulin- sensitizing actions of adiponectin on glucose uptake, fatty acid oxidation and gluconeogenesis. AMPK and PPARα are downstream targets of the ADIPORs, and ceramide signaling has also been implicated in mice and yeast. The aim of our studies of the PAQR protein family in C. elegans is to further elucidate their downstream signaling pathway using a model organism well suited for the generation of unbiased knowledge through forward genetics screens. We have focused our research on the C. elegans loss of function mutant of paqr-2. This protein is closely related to the mammalian ADIPORs and the mutant displays several interesting phenotypes. A forward genetics screen led us to identify IGLR-2 as a protein that physically interacts with PAQR-2 on cell membranes. The paqr-2 and iglr-2 mutants display identical phenotypes: sensitivity to cold and exogenous glucose as well as a withered tail tip morphology defect. All three phenotypes can be suppressed by mutations that directly or indirectly increase expression of Δ9 desaturases, enzymes that convert saturated fatty acids (SFA) into unsaturated fatty acids; conversely, paqr-2 and iglr-2 mutants have increased levels of SFA and decreased expression of the Δ9 desaturase reporter pfat-7::GFP. Poikilotherm organisms, such as C. elegans, adapt to a decreased environmental temperature in part by adjusting the fluidity of their cellular membranes. We hypothesized that PAQR-2 and IGLR-2 may act as regulators of membrane fluidity, and measured this property using fluorescence recovery after photobleaching, FRAP. The results reveal that paqr-2 and iglr-2, unlike wild type, do have reduced membrane fluidity upon challenge with low temperature or glucose supplementation, and that this defect can be suppressed by mutations know to promote Δ9 desaturase activity or rescued by detergents provided at membrane-fluidizing concentrations. We conclude that the adiponectin receptor homolog PAQR-2, and its partner IGLR-2, are involved in the C. elegans homeoviscous adaptation response and regulate membrane fluidity through activation of Δ9 desaturases.
- Published
- 2016
19. Caenorhabditis elegans PAQR-2 and IGLR-2 Protect against Glucose Toxicity by Modulating Membrane Lipid Composition
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Svensk, Emma, Devkota, Ranjan, Ståhlman, Marcus, Ranji, Parmida, Rauthan, Manish, Magnusson, Fredrik, Hammarsten, Sofia, Johansson, Maja, Borén, Jan, and Pilon, Marc
- Subjects
Nematoda ,lcsh:QH426-470 ,Cell Membranes ,Carbohydrates ,Research and Analysis Methods ,Toxicology ,Pathology and Laboratory Medicine ,Biochemistry ,Model Organisms ,Glucose Metabolism ,Medicine and Health Sciences ,Genetics ,Animals ,Gonads ,Toxicity ,Organic Compounds ,Monosaccharides ,Organic Chemistry ,Fatty Acids ,Chemical Compounds ,Organisms ,Reproductive System ,Biology and Life Sciences ,Animal Models ,Cell Biology ,Invertebrates ,Lipids ,Chemistry ,Phenotypes ,lcsh:Genetics ,Glucose ,Metabolism ,Caenorhabditis Elegans ,Physical Sciences ,Caenorhabditis ,Carbohydrate Metabolism ,Cellular Structures and Organelles ,Anatomy ,Genital Anatomy ,Research Article - Abstract
In spite of the worldwide impact of diabetes on human health, the mechanisms behind glucose toxicity remain elusive. Here we show that C. elegans mutants lacking paqr-2, the worm homolog of the adiponectin receptors AdipoR1/2, or its newly identified functional partner iglr-2, are glucose intolerant and die in the presence of as little as 20 mM glucose. Using FRAP (Fluorescence Recovery After Photobleaching) on living worms, we found that cultivation in the presence of glucose causes a decrease in membrane fluidity in paqr-2 and iglr-2 mutants and that genetic suppressors of this sensitivity act to restore membrane fluidity by promoting fatty acid desaturation. The essential roles of paqr-2 and iglr-2 in the presence of glucose are completely independent from daf-2 and daf-16, the C. elegans homologs of the insulin receptor and its downstream target FoxO, respectively. Using bimolecular fluorescence complementation, we also show that PAQR-2 and IGLR-2 interact on plasma membranes and thus may act together as a fluidity sensor that controls membrane lipid composition., Author Summary Using the nematode C. elegans as a model, we show that glucose decreases the fluidity of cellular membranes, which suggests a novel mechanism for the glucose toxicity observed in diabetics. We also show that the membrane proteins PAQR-2 and IGLR-2 are located together on cellular membranes and regulate fluidity in the presence of glucose. This is an important finding because PAQR-2 is a worm homolog of AdipoR1 and AdipoR2, themselves important anti-diabetic proteins of which the cellular mechanism of action has been difficult to elucidate. Thus in one stroke our work may explain glucose toxicity, describes a cellular mechanism that counteracts it, helps clarify the anti-diabetic roles of AdipoR1/2, and identifies IGLR-2 as a PAQR-2 co-receptor.
- Published
- 2016
20. The adiponectin receptor AdipoR2 and its Caenorhabditis elegans homolog PAQR-2 prevent membrane rigidification by exogenous saturated fatty acids
- Author
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Devkota, Ranjan, primary, Svensk, Emma, additional, Ruiz, Mario, additional, Ståhlman, Marcus, additional, Borén, Jan, additional, and Pilon, Marc, additional
- Published
- 2017
- Full Text
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21. Leveraging the withered tail tip phenotype inC. elegansto identify proteins that influence membrane properties
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Svensk, Emma, primary, Biermann, Jana, additional, Hammarsten, Sofia, additional, Magnusson, Fredrik, additional, and Pilon, Marc, additional
- Published
- 2016
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22. Correction: Caenorhabditis elegans PAQR-2 and IGLR-2 Protect against Glucose Toxicity by Modulating Membrane Lipid Composition
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Svensk, Emma, primary, Devkota, Ranjan, additional, Ståhlman, Marcus, additional, Ranji, Parmida, additional, Rauthan, Manish, additional, Magnusson, Fredrik, additional, Hammarsten, Sofia, additional, Johansson, Maja, additional, Borén, Jan, additional, and Pilon, Marc, additional
- Published
- 2016
- Full Text
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23. Gymkultur om identitet, kroppar och kön
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Svensk, Emma and Östman Edlund, Johanna
- Subjects
Humaniora ,Humanities ,pedagogik ,social konstruktivism ,Identitet ,gymkultur ,påverkan ,könsidentitet - Abstract
Syftet med denna studie har varit att undersöka hur gymkulturen tar sig uttryck i Sverige idag. Frågor som ställdes för att försöka besvara studien var bland annat; Finns det könsroller och identiteter på gym? Hur ser användandet av redskap, maskiner och övningar på gym ut? För att besvara dessa frågor har två studier genomförts. Inledningsvis gjordes en kvantitativ studie i form av en enkät där ett bekvämlighetsurval gjordes, där enkäten publicerades på Internet. Därefter gjordes en kvalitativ studie i form av en deltagande observation som genomfördes på ett gym i en mellanstor stad i Sverige. Under studien har författarna valt att använda sig utav det social konstruktivistiska synsättet då de bland annat önskat undersöka könroller och identiteter på gym. Resultatet visade att det finns skillnader mellan män och kvinnor som vistas på gym, bland annat när det kommer till redskap och sätt att träna. Studien styrker tidigare forskning som visat på att gymmet fortfarande tycks vara ett manligt fäste. Kvinnor tycks dock allt mer träda in i gymmet men flyr ännu de fria vikterna som tycks vara könskodade som manliga redskap. I studien framgår det att kvinnor i större utsträckning än män föredrar att träna i grupp eller med hög musik i hörlurarna för att inte bli störda medans männen i större utsträckning föredrar att träna själva men interagerar med andra eller att träna med en kompis eller två. Studien visar även på att män och kvinnor tycks trivas bra och mycket bra på gymmet. Slutsatsen vi har kunnat dra är att män fortfarande är det dominerande könet på gymmet och framför allt bland de fria vikterna, kvinnorna tycks ännu vara rädda för att göra entré bland de fria vikterna. Skillnad mellan män och kvinnor på gym finns det, framförallt när det gäller val av redskap och maskiner. Gymkulturen skapas av de män och kvinnor som genom att vistas på gym skapar sin egen och andras identitet samt könsidentitet.
- Published
- 2012
24. PAQR-2 Regulates Fatty Acid Desaturation during Cold Adaptation in C. elegans
- Author
-
Svensk, Emma, primary, Ståhlman, Marcus, additional, Andersson, Carl-Henrik, additional, Johansson, Maja, additional, Borén, Jan, additional, and Pilon, Marc, additional
- Published
- 2013
- Full Text
- View/download PDF
25. PAQR-2 may be a regulator of membrane f luidity during cold adaptation.
- Author
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Pilon, Marc and Svensk, Emma
- Subjects
- *
ADIPONECTIN , *DESATURASES , *ADENOSINE monophosphate , *FATTY acid desaturase , *PHOSPHOCHOLINE - Abstract
PAQR-2 is a C. elegans homolog of the mammalian adiponectin receptors. We have recently shown that PAQR-2 is essential for the ability of C. elegans to grow at its lower temperature range, i.e., 15 °C, and that the likely role of PAQR-2 during cold adaptation is to regulate membrane fluidity by promoting fatty acid desaturation. Here we present a summary of this work, with an emphasis on placing our C. elegans findings in the context of mammalian biology [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
26. PAQR-2 Regulates Fatty Acid Desaturation during Cold Adaptation in C. elegans.
- Author
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Svensk, Emma, Ståhlman, Marcus, Andersson, Carl-Henrik, Johansson, Maja, Borén, Jan, and Pilon, Marc
- Subjects
- *
ADIPONECTIN , *INSULIN , *TEMPERATURE , *LECITHIN , *GENETIC mutation - Abstract
C. elegans PAQR-2 is homologous to the insulin-sensitizing adiponectin receptors in mammals, and essential for adaptation to growth at 15°C, a low but usually acceptable temperature for this organism. By screening for novel paqr-2 suppressors, we identified mutations in genes involved in phosphatidylcholine synthesis (cept-1, pcyt-1 and sams-1) and fatty acid metabolism (ech-7, hacd-1, mdt-15, nhr-49 and sbp-1). We then show genetic evidence that paqr-2, phosphatidylcholines, sbp-1 and Δ9-desaturases form a cold adaptation pathway that regulates the increase in unsaturated fatty acids necessary to retain membrane fluidity at low temperatures. This model is supported by the observations that the paqr-2 suppressors normalize the levels of saturated fatty acids, and that low concentrations of detergents that increase membrane fluidity can rescue the paqr-2 mutant. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
27. PAQR-2 Regulates Fatty Acid Desaturation during Cold Adaptation in C. elegans.
- Author
-
Svensk, Emma, Ståhlman, Marcus, Andersson, Carl-Henrik, Johansson, Maja, Borén, Jan, and Pilon, Marc
- Subjects
ADIPONECTIN ,INSULIN ,TEMPERATURE ,LECITHIN ,GENETIC mutation - Abstract
C. elegans PAQR-2 is homologous to the insulin-sensitizing adiponectin receptors in mammals, and essential for adaptation to growth at 15°C, a low but usually acceptable temperature for this organism. By screening for novel paqr-2 suppressors, we identified mutations in genes involved in phosphatidylcholine synthesis (cept-1, pcyt-1 and sams-1) and fatty acid metabolism (ech-7, hacd-1, mdt-15, nhr-49 and sbp-1). We then show genetic evidence that paqr-2, phosphatidylcholines, sbp-1 and Δ9-desaturases form a cold adaptation pathway that regulates the increase in unsaturated fatty acids necessary to retain membrane fluidity at low temperatures. This model is supported by the observations that the paqr-2 suppressors normalize the levels of saturated fatty acids, and that low concentrations of detergents that increase membrane fluidity can rescue the paqr-2 mutant. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
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