Seasonal changes in lipogenesis and lipolysis in isolated adipocytes from Svalbard and Norwegian reindeer
Arctic reindeer exhibit marked seasonal changes in fat deposition and mobilization. At intervals throughout the year, therefore, we have measured feed intake of both Svalbard (SR) and Norwegian reindeer (NR) together with the seasonal changes in size, lipogenic and lipolytic capacity of isolated adi...
Published in: | Acta Physiologica Scandinavica |
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1985
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crwiley:10.1111/j.1748-1716.1985.tb07566.x 2024-09-30T14:31:21+00:00 Seasonal changes in lipogenesis and lipolysis in isolated adipocytes from Svalbard and Norwegian reindeer LARSEN, TERJE S. NILSSON, NILS Ö. BLIX, ARNOLDUS SCHYTTE 1985 http://dx.doi.org/10.1111/j.1748-1716.1985.tb07566.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1748-1716.1985.tb07566.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1748-1716.1985.tb07566.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Acta Physiologica Scandinavica volume 123, issue 1, page 97-104 ISSN 0001-6772 1365-201X journal-article 1985 crwiley https://doi.org/10.1111/j.1748-1716.1985.tb07566.x 2024-09-05T05:08:31Z Arctic reindeer exhibit marked seasonal changes in fat deposition and mobilization. At intervals throughout the year, therefore, we have measured feed intake of both Svalbard (SR) and Norwegian reindeer (NR) together with the seasonal changes in size, lipogenic and lipolytic capacity of isolated adipocytes from both sub‐species. Feed intake of both NR and SR was maximal in August, but declined thereafter, reaching minimum values in January (NR) and March (SR), 55 and 69% below the August value, respectively. NR and SR adipocyte volume changed in parallel and were reduced to the same extent (69%) from their maximum in August to their minimum in May. Adipocyte lipogenic capacity, measured as acetate incorporation into cellular lipid at saturated acetate concentrations, was lowest in January (NR adipocytes) and March (SR adipocytes), 92 and 90%, respectively, below the maximum values, which were obtained in August. Lipolytic capacity, measured as maximum adrenaline‐stimulated glycerol release, was high in SR adipocytes from March through to October and in NR adipocytes from July through to January. Minimum lipolytic capacity, on the other hand, was found in January (SR adipocytes) and March (NR adipocytes). The present findings may be explained by alterations in lipogenic enzyme activity and in the lipolytic activation system. Article in Journal/Newspaper Arctic Svalbard Wiley Online Library Arctic Svalbard Acta Physiologica Scandinavica 123 1 97 104 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Arctic reindeer exhibit marked seasonal changes in fat deposition and mobilization. At intervals throughout the year, therefore, we have measured feed intake of both Svalbard (SR) and Norwegian reindeer (NR) together with the seasonal changes in size, lipogenic and lipolytic capacity of isolated adipocytes from both sub‐species. Feed intake of both NR and SR was maximal in August, but declined thereafter, reaching minimum values in January (NR) and March (SR), 55 and 69% below the August value, respectively. NR and SR adipocyte volume changed in parallel and were reduced to the same extent (69%) from their maximum in August to their minimum in May. Adipocyte lipogenic capacity, measured as acetate incorporation into cellular lipid at saturated acetate concentrations, was lowest in January (NR adipocytes) and March (SR adipocytes), 92 and 90%, respectively, below the maximum values, which were obtained in August. Lipolytic capacity, measured as maximum adrenaline‐stimulated glycerol release, was high in SR adipocytes from March through to October and in NR adipocytes from July through to January. Minimum lipolytic capacity, on the other hand, was found in January (SR adipocytes) and March (NR adipocytes). The present findings may be explained by alterations in lipogenic enzyme activity and in the lipolytic activation system. |
format |
Article in Journal/Newspaper |
author |
LARSEN, TERJE S. NILSSON, NILS Ö. BLIX, ARNOLDUS SCHYTTE |
spellingShingle |
LARSEN, TERJE S. NILSSON, NILS Ö. BLIX, ARNOLDUS SCHYTTE Seasonal changes in lipogenesis and lipolysis in isolated adipocytes from Svalbard and Norwegian reindeer |
author_facet |
LARSEN, TERJE S. NILSSON, NILS Ö. BLIX, ARNOLDUS SCHYTTE |
author_sort |
LARSEN, TERJE S. |
title |
Seasonal changes in lipogenesis and lipolysis in isolated adipocytes from Svalbard and Norwegian reindeer |
title_short |
Seasonal changes in lipogenesis and lipolysis in isolated adipocytes from Svalbard and Norwegian reindeer |
title_full |
Seasonal changes in lipogenesis and lipolysis in isolated adipocytes from Svalbard and Norwegian reindeer |
title_fullStr |
Seasonal changes in lipogenesis and lipolysis in isolated adipocytes from Svalbard and Norwegian reindeer |
title_full_unstemmed |
Seasonal changes in lipogenesis and lipolysis in isolated adipocytes from Svalbard and Norwegian reindeer |
title_sort |
seasonal changes in lipogenesis and lipolysis in isolated adipocytes from svalbard and norwegian reindeer |
publisher |
Wiley |
publishDate |
1985 |
url |
http://dx.doi.org/10.1111/j.1748-1716.1985.tb07566.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1748-1716.1985.tb07566.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1748-1716.1985.tb07566.x |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Svalbard |
genre_facet |
Arctic Svalbard |
op_source |
Acta Physiologica Scandinavica volume 123, issue 1, page 97-104 ISSN 0001-6772 1365-201X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1748-1716.1985.tb07566.x |
container_title |
Acta Physiologica Scandinavica |
container_volume |
123 |
container_issue |
1 |
container_start_page |
97 |
op_container_end_page |
104 |
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1811635948265406464 |