Browsing NOFIMA vitenarkiv by Author "Afanasyev, Sergey"
Now showing items 1-20 of 22
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A comprehensive transcriptional body map of Atlantic salmon unveils the vital role of the intestine in the immune system and highlights functional specialization within its compartments
Kortner, Trond M.; Afanasyev, Sergey; Koppang, Erling Olaf; Bjørgen, Håvard; Krogdahl, Åshild; Krasnov, Aleksei (Peer reviewed; Journal article, 2024)The intestine is a barrier organ that plays an important role in the immune system of Atlantic salmon. The immune functions are distributed among the diffuse gut lymphoid tissue containing diverse immune cells, and other ... -
Climate change with increasing seawater temperature will challenge the health of farmed Atlantic Cod (Gadus morhua L.)
Ytteborg, Elisabeth; Falconer, Lynne; Krasnov, Aleksei; Johansen, Lill-Heidi; Timmerhaus, Gerrit; Johansson, Gunhild Seljehaug; Afanasyev, Sergey; Høst, Vibeke; Hjøllo, Solfrid Sætre; Hansen, Øyvind J; Lazado, Carlo C. (Peer reviewed; Journal article, 2023) -
Cold-blooded vertebrates evolved organized germinal center-like structures
Shibasaki, Yasuhiro; Afanasyev, Sergey; Fernández-Montero, Alvaro; Ding, Yang; Watanabe, Shota; Takizawa, Fumio; Lamas, Jesús; Fontenla-Iglesias, Francisco; Leiro, José Manuel; Krasnov, Aleksei; Boudinot, Pierre; Sunyer, J Oriol (Peer reviewed; Journal article, 2023)Germinal centers (GCs) or analogous secondary lymphoid microstructures (SLMs) are thought to have evolved in endothermic species. However, living representatives of their ectothermic ancestors can mount potent secondary ... -
Consequences of Haemorrhagic Smolt Syndrome (HSS) for the Immune Status of Atlantic salmon (Salmo salar L.) (Case Study)
Krasnov, Aleksei; Sommerset, Ingunn; Søfteland, Tina; Afanasyev, Sergey; Boysen, Preben; Lund, Hege (Peer reviewed; Journal article, 2020)Haemorrhagic smolt syndrome (HSS) is a disorder of unknown aetiology causing losses in the fresh water phase of Atlantic salmon farming. Normally, the mortality is limited and symptoms disappear upon seawater exposure. In ... -
Development of Atlantic Salmon (Salmo salar L.) Under Hypoxic Conditions Induced Sustained Changes in Expression of Immune Genes and Reduced Resistance to Moritella viscosa
Krasnov, Aleksei; Burgerhout, Erik; Johnsen, Hanne; Tveiten, Helge; Bakke, Anne Flore; Lund, Hege; Afanasyev, Sergey; Rebl, Alexander; Johansen, Lill-Heidi (Peer reviewed; Journal article, 2021)Atlantic salmon is characterized with high sensitivity to low dissolved oxygen (DO) levels. Hypoxia can affect diverse biological processes with consequences that can be manifested immediately or with delay. Effects of ... -
Differentiation and traffic of IgM<sup>+</sup> B cells between focal dark spots in skeletal muscle of Atlantic salmon, lymphoid and adipose tissues
Jiménez-Guerrero, Raúl.; Karlsen, Christian; Boudinot, Pierre; Afanasyev, Sergey; Mørkøre, Turid; Krasnov, Aleksei (Peer reviewed; Journal article, 2023) -
Effect of two constant light regimens on antibody profiles and immune gene expression in Atlantic salmon following vaccination and experimental challenge with salmonid alphavirus
Bakke, Anne Flore; Rebl, Alexander; Frost, Petter; Afanasyev, Sergey; Røyset, Kristoffer Alnes; Søfteland, Tina; Lund, Hege; Boysen, Preben; Krasnov, Aleksei (Peer reviewed; Journal article, 2021)Before seawater transfer, farmed Atlantic salmon are subjected to treatments that may affect the immune system and susceptibility to pathogens. E.g., exposure to constant light (CL) stimulates smoltification, which prepares ... -
Endocrine and Transcriptome Changes Associated with Testicular Growth and Differentiation in Atlantic Salmon (Salmo salar L.)
Skjold, Vetle; Afanasyev, Sergey; Burgerhout, Erik; Sveen, Lene; Rørvik, Kjell-Arne; Mota, Vasco Filipe Cardoso Neves; Dessen, Jens-Erik; Krasnov, Aleksei (Peer reviewed; Journal article, 2024) -
Evaluation of Immune Status in Two Cohorts of Atlantic Salmon Raised in Different Aquaculture Systems (Case Study)
Lund, Hege; Bakken, Anne Marie; Boysen, Preben; Afanasyev, Sergey; Rebl, Alexander; Manji, Farah; Ritchie, Gordon; Krasnov, Aleksei (Peer reviewed; Journal article, 2022) -
Gene expression analyses of immune responses in Atlantic salmon during early stages of infection by salmon louse (Lepeophtheirus salmonis) revealed bi-phasic responses coinciding with the copepod-chalimus transition
Tadiso, Tariku Markos; Krasnov, Aleksei; Skugor, Stanko; Afanasyev, Sergey; Hordvik, Ivar; Nilsen, Frank (Peer reviewed; Journal article, 2011)Background: The salmon louse (Lepeophtheirus salmonis Krøyer), an ectoparasitic copepod with a complex life cycle causes significant losses in salmon aquaculture. Pesticide treatments against the parasite raise environmental ... -
IgM+ and IgT+ B Cell Traffic to the Heart during SAV Infection in Atlantic Salmon
Bakke, Anne Flore; Bjørgen, Håvard; Koppang, Erling Olaf; Frost, Petter; Afanasyev, Sergey; Boysen, Preben; Krasnov, Aleksei; Lund, Hege (Peer reviewed; Journal article, 2020) -
Long-Term Influence of PCB- and PBDE-Spiked Microplastic Spheres Fed through Rotifers to Atlantic Cod (Gadus morhua) Larvae
Bogevik, André Sture; Puvanendran, Velmurugu; Vorkamp, Katrin; Burgerhout, Erik; Hansen, Øyvind J; Fernández-Míguez, María; Krasnov, Aleksei; Afanasyev, Sergey; Høst, Vibeke; Ytteborg, Elisabeth (Peer reviewed; Journal article, 2023) -
Moritella viscosa early infection and transcriptional responses of intraperitoneal vaccinated and unvaccinated Atlantic salmon
Karlsen, Christian; Ytteborg, Elisabeth; Furevik, Anette; Sveen, Lene; Tunheim, Siv Haugen; Afanasyev, Sergey; Tingbø, Monica Gausdal; Krasnov, Aleksei (Peer reviewed; Journal article, 2023) -
Morphology, Transcriptomics and In Vitro Model of Skin from Polar Cod (Boreogadus Saida) and Atlantic Cod (Gadus Morhua)
Ytteborg, Elisabeth; Hansen, Øyvind Johannes; Høst, Vibeke; Afanasyev, Sergey; Vieweg, Ireen; Nahrgang, Jasmine; Krasnov, Aleksei (Peer reviewed; Journal article, 2020) -
Multigene expression assay for assessment of the immune status of Atlantic Salmon
Krasnov, Aleksei; Afanasyev, Sergey; Nylund, Stian; Rebl, Alexander (Peer reviewed; Journal article, 2020)We report the development of a multigene gene expression assay on the BioMark HD platform for the evaluation of immune competence (ImCom) in farmed Atlantic salmon. The first version of the assay included 92 genes selected ... -
Photoperiod in recirculation aquaculture systems and timing of seawater transfer affect seawater growth performance of Atlantic salmon (Salmo salar)
Ytrestøyl, Trine; Hjelle, Elise; Kolarevic, Jelena; Takle, Harald Rune; Rebl, Alexander; Afanasyev, Sergey; Krasnov, Aleksei; Brunsvik, Per S.; Terjesen, Bendik Fyhn (Peer reviewed; Journal article, 2022)Production of Atlantic salmon smolts in recirculation aquaculture systems (RAS) is growing, and novel production protocols using continuous light in RAS are being implemented in the industry. In the present study, Atlantic ... -
Smoltification of Atlantic Salmon (Salmo salar L.) Is Associated with Enhanced Traffic and Renewal of B Cell Repertoire
Krasnov, Aleksei; Afanasyev, Sergey; Hansen, Marianne Helén Selander; Bou, Marta; Sveen, Lene; Dessen, Jens-Erik (Peer reviewed; Journal article, 2024) -
Standardized IMGT nomenclature of Salmonidae IGH genes, the paradigm of Atlantic salmon and rainbow trout: from genomics to repertoires
Magadan, Susana; Krasnov, Aleksei; Hadi-Saljoki, Saida; Afanasyev, Sergey; Mondot, Stanislas; Lallias, Delphine; Castro, Rosario; Salinas, Irene; Sunyer, Oriol; Hansen, John; Koop, Ben F.; Lefranc, Marie-Paule; Boudinot, Pierre (Peer reviewed; Journal article, 2019) -
The Atlantic Salmon Gill Transcriptome Response in a Natural Outbreak of Salmon Gill Pox Virus Infection Reveals New Biomarkers of Gill Pathology and Suppression of Mucosal Defense
Gjessing, Mona Cecilie; Krasnov, Aleksei; Timmerhaus, Gerrit; Brun, Svante; Afanasyev, Sergey; Dale, Ole Bendik; Dahle, Maria (Peer reviewed; Journal article, 2020) -
The Atlantic Salmon Gill Transcriptome Response in a Natural Outbreak of Salmon Gill Pox Virus Infection Reveals New Biomarkers of Gill Pathology and Suppression of Mucosal Defense
Gjessing, Mona Cecilie; Krasnov, Aleksei; Timmerhaus, Gerrit; Brun, Svante; Afanasyev, Sergey; Dale, Ole Bendik; Dahle, Maria K (Peer reviewed; Journal article, 2020)The salmon gill poxvirus (SGPV) is a large DNA virus that infects gill epithelial cells in Atlantic salmon and is associated with acute high mortality disease outbreaks in aquaculture. The pathological effects of SGPV ...