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Sjödin, Anna
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Publications (10 of 10) Show all publications
Ericsson, M., Sjödin, A. & Burén, J. (2017). Försämrad hjärtfunktion efter fyra veckors intag av lågkolhydrat/högfettkost hos möss: Kan vi lära av translationell forskning?. Svensk kardiologi (1), 33-35
Open this publication in new window or tab >>Försämrad hjärtfunktion efter fyra veckors intag av lågkolhydrat/högfettkost hos möss: Kan vi lära av translationell forskning?
2017 (Swedish)In: Svensk kardiologi, ISSN 1400-5816, no 1, p. 33-35Article in journal (Other (popular science, discussion, etc.)) Published
National Category
Cardiac and Cardiovascular Systems Nutrition and Dietetics
Research subject
Cardiology; Nutrition
Identifiers
urn:nbn:se:umu:diva-135644 (URN)
Available from: 2017-06-01 Created: 2017-06-01 Last updated: 2018-06-09
Nilsson, J., Ericsson, M., Joibari, M. M., Anderson, F., Carlsson, L., Nilsson, S. K., . . . Burén, J. (2016). A low-carbohydrate high-fat diet decreases lean mass and impairs cardiac function in pair-fed female C57BL/6J mice. Nutrition & Metabolism, 13, Article ID 79.
Open this publication in new window or tab >>A low-carbohydrate high-fat diet decreases lean mass and impairs cardiac function in pair-fed female C57BL/6J mice
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2016 (English)In: Nutrition & Metabolism, ISSN 1743-7075, E-ISSN 1743-7075, Vol. 13, article id 79Article in journal (Refereed) Published
Abstract [en]

BACKGROUND: Excess body fat is a major health issue and a risk factor for the development of numerous chronic diseases. Low-carbohydrate diets like the Atkins Diet are popular for rapid weight loss, but the long-term consequences remain the subject of debate. The Scandinavian low-carbohydrate high-fat (LCHF) diet, which has been popular in Scandinavian countries for about a decade, has very low carbohydrate content (~5 E %) but is rich in fat and includes a high proportion of saturated fatty acids. Here we investigated the metabolic and physiological consequences of a diet with a macronutrient composition similar to the Scandinavian LCHF diet and its effects on the organs, tissues, and metabolism of weight stable mice.

METHODS: Female C57BL/6J mice were iso-energetically pair-fed for 4 weeks with standard chow or a LCHF diet. We measured body composition using echo MRI and the aerobic capacity before and after 2 and 4 weeks on diet. Cardiac function was assessed by echocardiography before and after 4 weeks on diet. The metabolic rate was measured by indirect calorimetry the fourth week of the diet. Mice were sacrificed after 4 weeks and the organ weight, triglyceride levels, and blood chemistry were analyzed, and the expression of key ketogenic, metabolic, hormonal, and inflammation genes were measured in the heart, liver, and adipose tissue depots of the mice using real-time PCR.

RESULTS: The increase in body weight of mice fed a LCHF diet was similar to that in controls. However, while control mice maintained their body composition throughout the study, LCHF mice gained fat mass at the expense of lean mass after 2 weeks. The LCHF diet increased cardiac triglyceride content, impaired cardiac function, and reduced aerobic capacity. It also induced pronounced alterations in gene expression and substrate metabolism, indicating a unique metabolic state.

CONCLUSIONS: Pair-fed mice eating LCHF increased their percentage of body fat at the expense of lean mass already after 2 weeks, and after 4 weeks the function of the heart deteriorated. These findings highlight the urgent need to investigate the effects of a LCHF diet on health parameters in humans.

Place, publisher, year, edition, pages
BioMed Central, 2016
Keywords
Low-carbohydrate diet, Heart, Mouse
National Category
Clinical Medicine Physiology Nutrition and Dietetics Cardiac and Cardiovascular Systems
Identifiers
urn:nbn:se:umu:diva-128938 (URN)10.1186/s12986-016-0132-8 (DOI)000388140200001 ()27891164 (PubMedID)
Available from: 2016-12-20 Created: 2016-12-20 Last updated: 2018-06-09Bibliographically approved
Ahlgren, R., Malmros, B., Sjödin, A. & Tieva, Å. (2015). Att bryta en trend och förändra en tradition. In: Universitetspedagogiska konferensen 2015: Gränslös kunskap. Paper presented at Universitetspedagogiska konferensen 2015, Gränslös kunskap, Umeå, 8-9 oktober 2015 (pp. 6-7). Umeå: Umeå universitet
Open this publication in new window or tab >>Att bryta en trend och förändra en tradition
2015 (Swedish)In: Universitetspedagogiska konferensen 2015: Gränslös kunskap, Umeå: Umeå universitet , 2015, p. 6-7Conference paper, Oral presentation with published abstract (Other academic)
Place, publisher, year, edition, pages
Umeå: Umeå universitet, 2015
National Category
Pedagogy
Identifiers
urn:nbn:se:umu:diva-114102 (URN)
Conference
Universitetspedagogiska konferensen 2015, Gränslös kunskap, Umeå, 8-9 oktober 2015
Available from: 2016-01-13 Created: 2016-01-13 Last updated: 2018-06-07Bibliographically approved
Sjödin, A., Persson, S., Stigsson Claesson, M. & Burén, J. (2013). Motionärer och elit har samma koll på kosten. Svensk Idrottsforskning: Organ för Centrum för Idrottsforskning (4), 35-37
Open this publication in new window or tab >>Motionärer och elit har samma koll på kosten
2013 (Swedish)In: Svensk Idrottsforskning: Organ för Centrum för Idrottsforskning, ISSN 1103-4629, no 4, p. 35-37Article in journal (Other (popular science, discussion, etc.)) Published
Abstract [sv]

Elitspelare i innebandyns superliga har inte bättre kunskap än motionärer om vilka kostrekommendationer som gäller vid träning. Lägst kunskap har spelarna om kostens betydelse för uppladdningen. För att kunna prestera maximalt är det viktigt att kunna anpassa energi-, närings- och vätskeintag till sin idrott.

Place, publisher, year, edition, pages
Centrum för Idrottsforskning, 2013
Keywords
Idrottsnutrition, kost, uppladdning, innebandy, kunskap
National Category
Nutrition and Dietetics Sport and Fitness Sciences
Research subject
Food and Nutrition
Identifiers
urn:nbn:se:umu:diva-86508 (URN)
Available from: 2014-02-28 Created: 2014-02-28 Last updated: 2018-06-08Bibliographically approved
Sjödin, A., Ljuslinder, I., Henriksson, R. & Hedman, H. (2008). Mammaglobin and lipophilin B expression in breast tumors and their lack of effect on breast cancer cell proliferation.. Anticancer Research, 28(3A), 1493-1498
Open this publication in new window or tab >>Mammaglobin and lipophilin B expression in breast tumors and their lack of effect on breast cancer cell proliferation.
2008 (English)In: Anticancer Research, ISSN 0250-7005, E-ISSN 1791-7530, Vol. 28, no 3A, p. 1493-1498Article in journal (Refereed) Published
Abstract [en]

Mammaglobin (SCGB2A2) and lipophilin B (SCGB1D2) are members of the secretoglobin polypeptide family. Mammaglobin has been shown to be overexpressed in breast tumor tissue, indicating that mammaglobin might confer a growth advantage to mammaglobin-expressing tumor cells. Materials and Methods: The mammaglobin and lipophilin B mRNA expression levels were investigated in seven breast tumors and matched non-neoplastic tissues from the same patients using quantitative real-time RT-PCR. The effect of mammaglobin and lipophilin B expression on breast cancer cell proliferation rates was investigated by analyzing retrovirally transduced Hs578T cell clones. Cell proliferation rates were determined during the exponential growth phase by analyzing the change in lactate dehydrogenase activity over time. Results: All analyzed breast cancer tumors had lower expression levels of mammaglobin and lipophilin B than the respective mean level of the non-neoplastic breast tissues; no prominent overexpression was evident. There was high variability in the expression of mammaglobin and lipophilin B among the non-neoplastic samples, showing that caution should be taken when evaluating their over- and underexpression in tumors. The expression levels of mammaglobin and lipophilin B correlated with each other in the analyzed samples (p=0.001). Ectopic overexpression of mammaglobin and lipophilin B did not affect the cell proliferation rate of Hs578T breast carcinoma cells in vitro. Conclusion: Our findings suggest that the overexpression of mammaglobin observed in certain breast tumors is an epiphenomenon not causally involved in breast carcinogenesis.

Keywords
Mammaglobin, lipophilin B, secretoglobin, breast cancer, proliferation
Identifiers
urn:nbn:se:umu:diva-10408 (URN)18630503 (PubMedID)
Available from: 2008-09-05 Created: 2008-09-05 Last updated: 2018-06-09Bibliographically approved
Sjödin, A. (2005). Human secretoglobins in normal and neoplastic cells and tissues. (Doctoral dissertation). Umeå: Umeå universitet
Open this publication in new window or tab >>Human secretoglobins in normal and neoplastic cells and tissues
2005 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Secretoglobins is a newly described polypeptide family that has gained a lot of interest in human cancer and inflammation research. Although the first secretoglobin polypeptide was discovered more than 30 years ago, their physiological function is still not known. The aim of this thesis was to study the expression of secretoglobins in normal and neoplastic human cells and tissues, and to clarify their possible involvement in human cancer.

We established sensitive and specific quantitative real-time RT-PCR assays for uteroglobin, lipophilins A, B, C, mammaglobin, HIN-1, and UGRP1, and developed specific antibodies for lipophilin B and mammaglobin. By using quantitative real-time RT-PCR, immunohistochemistry, Western blotting, and in situ hybridization, we studied secretoglobin expression in normal and neoplastic cells and tissues.

In normal tissues, real-time RT-PCR analysis showed high expression of mammaglobin in skin. The mammaglobin expression in skin tissue was further confirmed by in situ hybridization and immunohistochemistry, and the expression was shown to be localized to the coiled gland cells of the eccrine sweat glands and the apocrine sweat glands. In addition, we showed by using Western blotting, that mammaglobin was secreted into perspiration from the eccrine sweat glands. In pituitary gland, immunohistochemical analysis showed that lipophilin B was expressed by approximately half of the cells in the anterior pituitary. By using quantitative real-time RT-PCR it was shown that both lipophilins B and C mRNA were expressed in the pituitary gland, therefore we suggested that lipophilins B and C form heterodimers in human pituitary.

In neoplastic tissues, real-time RT-PCR analysis showed dysregulated secretoglobin expression in lung tumors, with down-regulation of uteroglobin and frequent up-regulation of lipophilins A, B, C, and mammaglobin. Immunohistochemical analyses showed down-regulation of mammaglobin in cylindromas versus non-neoplastic eccrine sweat glands and of lipophilin B in pituitary adenomas versus non-neoplastic anterior pituitary. The majority of investigated cell lines showed low, or most often, lack of secretoglobin expression. Nevertheless, it has been shown that mammaglobin is over-expressed in human breast carcinomas. However, ectopic over-expression of mammaglobin and/or lipophilin B had no appreciable effect on cell proliferation rates of Hs578T breast carcinoma cells in vitro. This does not exclude the possibility that secretoglobins could confer some advantage to tumor cells in vivo, but, it indicates that the reported over-expression of mammaglobin is an epiphenomenon not causally involved in breast carcinogenesis.

In summary, our major findings were that mammaglobin was expressed and secreted by the sweat glands of the skin and lipophilin B was expressed by the anterior pituitary gland; and, that expression of mammaglobin and lipophilin B were down-regulated in tumors derived from the same tissues, i.e, in cylindromas and pituitary adenomas, respectively. Furthermore, ectopic over-expression of mammaglobin and lipophilin B in breast carcinoma cells had no appreciable effect on cell proliferation rates in vitro.

Place, publisher, year, edition, pages
Umeå: Umeå universitet, 2005. p. 43
Series
Umeå University medical dissertations, ISSN 0346-6612 ; 956
Keywords
Oncology, secretoglobins, mammaglobin, lipophilin, breast cancer, pituitary, sweat gland, Onkologi
National Category
Cancer and Oncology
Research subject
Oncology
Identifiers
urn:nbn:se:umu:diva-490 (URN)91-7305-853-X (ISBN)
Public defence
2005-04-22, Föreläsningssal 244, Lionsalen, 7A, NUS, Umeå, 09:00 (English)
Opponent
Supervisors
Available from: 2005-04-01 Created: 2005-04-01 Last updated: 2018-06-09Bibliographically approved
Sjödin, A., Guo, D., Lund-Johansen, M., Krossnes, B. K., Lilleng, P., Henriksson, R. & Hedman, H. (2005). Secretoglobins in the human pituitary: high expression of lipophilin B and its down-regulation in pituitary adenomas. Acta Neuropathologica, 109(4), 381-386
Open this publication in new window or tab >>Secretoglobins in the human pituitary: high expression of lipophilin B and its down-regulation in pituitary adenomas
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2005 (English)In: Acta Neuropathologica, ISSN 0001-6322, E-ISSN 1432-0533, Vol. 109, no 4, p. 381-386Article in journal (Refereed) Published
Abstract [en]

Secretoglobins are small secreted proteins, the expression of which has mostly been associated with secretory mucosal epithelia. Several secretoglobins have been implicated in the development of various human cancers. Allelic deletions of chromosome 11q13 correlates with the invasiveness of pituitary tumors. Intriguingly, several secretoglobin genes are located on 11q13; however, for most of these genes the expression in the pituitary and pituitary tumors have not been investigated. Antibodies specific for the secretoglobin lipophilin B (SCGB1D2, BU101) were developed and used in an immunohistochemical analysis of a human normal tissue microarray. Prominent lipophilin B immunoreactivity was found in the secretory cells of the anterior pituitary. Eight of nine analyzed pituitary adenomas showed a reduction in lipophilin B immunoreactivity compared to normal pituitary. However, there was no apparent association between lipophilin B immunoreactivity and hormone production or tumor invasiveness. Expression of eight different secretoglobin mRNAs were analyzed in normal pituitary and the pituitary adenoma cell line HP75 by highly specific quantitative real-time reverse transcription-PCR assays. Lipophilins B and C (SCGB2A1, mammaglobin B) were the most prominently expressed secretoglobin mRNAs in the pituitary. No secretoglobin mRNA was detected in the HP75 cells. The present report demonstrates, for the first time, lipophilin B expression in the pituitary and its apparent down-regulation in pituitary adenomas.

Keywords
Secretoglobins, lipophilin, pituitary gland, adenoma
Identifiers
urn:nbn:se:umu:diva-14632 (URN)10.1007/s00401-004-0972-6 (DOI)15668787 (PubMedID)
Available from: 2007-02-27 Created: 2007-02-27 Last updated: 2018-06-09Bibliographically approved
Sjödin, A., Guo, D., Sørhaug, S., Bjermer, L., Henriksson, R. & Hedman, H. (2003). Dysregulated secretoglobin expression in human lung cancers. Lung Cancer, 41(1), 49-56
Open this publication in new window or tab >>Dysregulated secretoglobin expression in human lung cancers
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2003 (English)In: Lung Cancer, ISSN 0169-5002, E-ISSN 1872-8332, Vol. 41, no 1, p. 49-56Article in journal (Refereed) Published
Abstract [en]

Lipophilins A, B, C, mammaglobin, and uteroglobin are members of the secretoglobin family of small, secreted, proteins. The functions of these proteins are not well understood but uteroglobin has been implicated in the development of cancers. Uteroglobin is known to be highly expressed in normal lung and down-regulated in lung cancers but expression of the other secretoglobins in normal lung and lung neoplasms have not been investigated. Therefore, we developed quantitative real-time reverse transcription (RT-) PCR assays for the different secretoglobins and evaluated their expression in normal and neoplastic lung tissues. The secretoglobin transcript levels were quantitated by real-time RT-PCR in samples from three normal lungs, 24 lung tumors including six small cell lung carcinomas, seven adenocarcinomas, and five squamous cell carcinomas, and in cell lines from three small cell lung carcinomas and one mesothelioma. Uteroglobin was confirmed to be abundantly expressed in normal lung and the different lung tumors showed down-regulated uteroglobin expression. Of the other secretoglobins, only lipophilin C was detected in normal lung, albeit at low levels. The lung tumors, however, frequently showed neo- or up-regulation of lipophilins A, B, C, and mammaglobin. The results constitute the first quantitative evaluation of secretoglobin expression in normal and neoplastic human lung tissues and demonstrate dysregulation in various human lung cancers. These findings could have important biological and diagnostic implications.

Identifiers
urn:nbn:se:umu:diva-29919 (URN)10.1016/S0169-5002(03)00126-0 (DOI)12826312 (PubMedID)
Available from: 2009-11-27 Created: 2009-11-27 Last updated: 2018-06-08
Sjödin, A., Guo, D., Hofer, P.-Å., Henriksson, R. & Hedman, H. (2003). Mammaglobin in normal human sweat glands and human sweat gland tumors. Journal of Investigative Dermatology, 121(2), 428-429
Open this publication in new window or tab >>Mammaglobin in normal human sweat glands and human sweat gland tumors
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2003 (English)In: Journal of Investigative Dermatology, ISSN 0022-202X, E-ISSN 1523-1747, Vol. 121, no 2, p. 428-429Article in journal (Other academic) Published
Identifiers
urn:nbn:se:umu:diva-4458 (URN)10.1046/j.1523-1747.2003.12374.x (DOI)12880439 (PubMedID)
Available from: 2005-04-01 Created: 2005-04-01 Last updated: 2018-06-09Bibliographically approved
Sjödin, A., Guo, D., Sorhaug, S., Bjermer, L., Henriksson, R. & Hedman, H. (2003). Mammaglobin in normal human sweat glans and human sweat gland tumors. J Invest Dermatol, 121(2), 428-429
Open this publication in new window or tab >>Mammaglobin in normal human sweat glans and human sweat gland tumors
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2003 (English)In: J Invest Dermatol, Vol. 121, no 2, p. 428-429Article in journal (Refereed) Published
Identifiers
urn:nbn:se:umu:diva-9388 (URN)
Available from: 2008-03-28 Created: 2008-03-28 Last updated: 2018-06-09Bibliographically approved
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