Fat-1 gene modulates the fatty acid composition of femoral and vertebral phospholipids
Dietary polyunsaturated fatty acid (PUFA) incorporation into bone may alter its metabolism through changes in the fatty acid composition of membrane phospholipids. Alteration of the membrane phospholipid fatty acid composition may influence bone cell signalling and, potentially, bone mineralization....
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Published in | Applied physiology, nutrition, and metabolism Vol. 35; no. 4; pp. 447 - 455 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Ottawa
Presses scientifiques du CNRC
01.08.2010
NRC Research Press Canadian Science Publishing NRC Research Press |
Subjects | |
Online Access | Get full text |
ISSN | 1715-5312 1715-5320 |
DOI | 10.1139/H10-029 |
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Abstract | Dietary polyunsaturated fatty acid (PUFA) incorporation into bone may alter its metabolism through changes in the fatty acid composition of membrane phospholipids. Alteration of the membrane phospholipid fatty acid composition may influence bone cell signalling and, potentially, bone mineralization. The objective of this study was to use the fat-1 mouse, a transgenic model that synthesizes n-3 from n-6 PUFA, to determine if the fat-1 gene modulates the fatty acid composition of femoral and vertebral phospholipids, and if so, whether the fatty acid levels would correlate with bone mineral density (BMD) at both skeletal sites. Male and female wild-type and fat-1 mice were fed an AIN93-G diet, containing 10% safflower oil, from weaning to 12 weeks of age. The fatty acid composition of femoral and vertebral phospholipids was measured by gas liquid chromatography. At 12 weeks of age, phosphatidylcholine, phosphatidylethanolamine, and phosphatidylserine fractions in the vertebrae of fat-1 mice had a significantly lower n-6/n-3 ratio than wild-type mice (p < 0.05). In fat-1 femurs, these fractions, along with phosphatidylinositol, had a lower n-6/n-3 ratio than wild-type mice (p < 0.001). Docosahexaenoic acid (DHA) was positively correlated with BMD in all fractions in the vertebrae, and in phosphatidylinositol and phosphatidylserine in the femur (p < 0.05). Overall, the fat-1 gene resulted in changes in the fatty acid composition of both femoral and vertebral phospholipids. Significant correlations between DHA and BMD may indicate a positive effect on bone mineralization. |
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AbstractList | Dietary polyunsaturated fatty acid (PUFA) incorporation into bone may alter its metabolism through changes in the fatty acid composition of membrane phospholipids. Alteration of the membrane phospholipid fatty acid composition may influence bone cell signalling and, potentially, bone mineralization. The objective of this study was to use the fat-1 mouse, a transgenic model that synthesizes n-3 from n-6 PUFA, to determine if the fat-1 gene modulates the fatty acid composition of femoral and vertebral phospholipids, and if so, whether the fatty acid levels would correlate with bone mineral density (BMD) at both skeletal sites. Male and female wild-type and fat-1 mice were fed an AIN93-G diet, containing 10% safflower oil, from weaning to 12 weeks of age. The fatty acid composition of femoral and vertebral phospholipids was measured by gas liquid chromatography. At 12 weeks of age, phosphatidylcholine, phosphatidylethanolamine, and phosphatidylserine fractions in the vertebrae of fat-1 mice had a significantly lower n-6/n-3 ratio than wild-type mice (p<0.05). In fat-1 femurs, these fractions, along with phosphatidylinositol, had a lower n-6/n-3 ratio than wild-type mice (p<0.001). Docosahexaenoic acid (DHA) was positively correlated with BMD in all fractions in the vertebrae, and in phosphatidylinositol and phosphatidylserine in the femur (p<0.05). Overall, the fat-1 gene resulted in changes in the fatty acid composition of both femoral and vertebral phospholipids. Significant correlations between DHA and BMD may indicate a positive effect on bone mineralization. Dietary polyunsaturated tatty acid (PUFA) incorporation into bone may alter its metabolism through changes in the Tally acid composition of membrane phospholipids. Alteration of the membrane phospholipid fatly acid composition may influence bone cell signalling and, potentially, bone mineralization. The objective of this study was to use the fat-1 mouse, a transgenic model thai synthesizes n-3 from n-6 PUFA, to determine if the fat-1 gene modulates the fatty acid composition of femoral and vertebral phospholipids, and if so, whether the fatty acid levels would correlate with bone mineral density (BMD) at both skeletal sites. Male and female wild-type and fat-1 mice were fed an A1N93-G diet, containing 10% safflower oil, from weaning to 12 weeks of age. The fatty acid composition of femoral and vertebral phospholipids was measured by gas liquid chromatography. At 12 weeks of age, phosphatidylcholine, phosphatidylethanolamine, and phosphatidyl serine fractions in the vertebrae of fat-1 mice had a significantly lower n-6/n-3 ratio than wild-type mice (p < 0.05). In fat-1 femurs, these fractions, along with phosphatidyl inositol, had a lower n-6/n-3 ratio than wild-type mice (p < 0.001). Docosahexaenoic acid (DHA) was positively correlated with BMD in all fractions in the vertebrae, and in phosphatidylinositol and phosphatidyl serine in the femur (p < 0.05). Overall, the fat-1 gene resulted in changes in the fatty acid composition of both femoral and vertebral phospholipids. Significant correlations between DHA and BMD may indicate a positive effect on bone mineralization. Key words: fatty acids, phospholipids, bone mineral density, bone development, mice. L'integration des acides gras polyinsatures (PUFA) alimentaires dans le tissu osseux pent affecter le metabolisme par alteration de la composition en acides gras des phospholipides de la membrane. La modification de la composition en acides gras des phospholipides membranaires pourrait influencer la signalisation dans les cellules osseuses et, de ce fait, la mineralisation des os. Celte etude se propose de verifier chez la souris fat-1, une souris transgenique pouvant syniheliser des PUFA (n-3) a partir de PUFA (17-6) si le gene de la souris fat-1 module la composition en acides gras des phospholipides de la membrane osseuse dn femur et des vertebres et, le cas echeant, de determiner la correlation entre la concentration d'acides gras et la densite minerale osseuse (BMD) dans les deux os. On soumet des souris males et femelles de type sauvage et de type fat-1 a une diete AIN93-G contenant 10 % d'huile de carthame depuis la periode de sevrage jusqu'a l'age de 12 semaines. On mesure la composition en acides gras des phospholipides femoraux et vertebraux par chromatographie en phase gazeuse. A la douzieme semaine, la phosphatidylcholine, la phosphatidylethanolamine et la phosphatidylserine des vertebres des souris fat-1 presentenl un ratio n-6/n-3 significativement inferieur a celui des souris de lype sauvage (p < 0,05). Dans les femurs des souris de type fat-1, on observe le meme phenomene en plus de noier un plus faible ratio n-6/n-3 dans le phosphatidylinositol (p < 0,001) que chez les souris de type sauvage. La concentration d'acide docosahexaenoique (DHA) est positivement associee a la BMD des vertebres et il en est de meme des concentrations de phosphatidylinositol et de phosphatidylserine en ce qui concerne la BMD du femur (p < 0.05). Globalement, le gene fat-1 suscite des modifications de la composition en acides gras des phospholipides membranaires du femur el des vertebres. Les correlations significatives entre la concentration de DHA et la BMD indiquent des effets potentiels positifs sur la mineralisation. Mots-cles : acides gras, phospholipides, densite minerale osseuse, developpement osseux, souris. [Traduit par la Redaction] Dietary polyunsaturated fatty acid (PUFA) incorporation into bone may alter its metabolism through changes in the fatty acid composition of membrane phospholipids. Alteration of the membrane phospholipid fatty acid composition may influence bone cell signalling and, potentially, bone mineralization. The objective of this study was to use the fat-1 mouse, a transgenic model that synthesizes n-3 from n-6 PUFA, to determine if the fat-1 gene modulates the fatty acid composition of femoral and vertebral phospholipids, and if so, whether the fatty acid levels would correlate with bone mineral density (BMD) at both skeletal sites. Male and female wild-type and fat-1 mice were fed an AIN93-G diet, containing 10% safflower oil, from weaning to 12 weeks of age. The fatty acid composition of femoral and vertebral phospholipids was measured by gas liquid chromatography. At 12 weeks of age, phosphatidylcholine, phosphatidylethanolamine, and phosphatidylserine fractions in the vertebrae of fat-1 mice had a significantly lower n-6/n-3 ratio than wild-type mice (p<0.05). In fat-1 femurs, these fractions, along with phosphatidylinositol, had a lower n-6/n-3 ratio than wild-type mice (p<0.001). Docosahexaenoic acid (DHA) was positively correlated with BMD in all fractions in the vertebrae, and in phosphatidylinositol and phosphatidylserine in the femur (p<0.05). Overall, the fat-1 gene resulted in changes in the fatty acid composition of both femoral and vertebral phospholipids. Significant correlations between DHA and BMD may indicate a positive effect on bone mineralization.Dietary polyunsaturated fatty acid (PUFA) incorporation into bone may alter its metabolism through changes in the fatty acid composition of membrane phospholipids. Alteration of the membrane phospholipid fatty acid composition may influence bone cell signalling and, potentially, bone mineralization. The objective of this study was to use the fat-1 mouse, a transgenic model that synthesizes n-3 from n-6 PUFA, to determine if the fat-1 gene modulates the fatty acid composition of femoral and vertebral phospholipids, and if so, whether the fatty acid levels would correlate with bone mineral density (BMD) at both skeletal sites. Male and female wild-type and fat-1 mice were fed an AIN93-G diet, containing 10% safflower oil, from weaning to 12 weeks of age. The fatty acid composition of femoral and vertebral phospholipids was measured by gas liquid chromatography. At 12 weeks of age, phosphatidylcholine, phosphatidylethanolamine, and phosphatidylserine fractions in the vertebrae of fat-1 mice had a significantly lower n-6/n-3 ratio than wild-type mice (p<0.05). In fat-1 femurs, these fractions, along with phosphatidylinositol, had a lower n-6/n-3 ratio than wild-type mice (p<0.001). Docosahexaenoic acid (DHA) was positively correlated with BMD in all fractions in the vertebrae, and in phosphatidylinositol and phosphatidylserine in the femur (p<0.05). Overall, the fat-1 gene resulted in changes in the fatty acid composition of both femoral and vertebral phospholipids. Significant correlations between DHA and BMD may indicate a positive effect on bone mineralization. Dietary polyunsaturated fatty acid (PUFA) incorporation into bone may alter its metabolism through changes in the fatty acid composition of membrane phospholipids. Alteration of the membrane phospholipid fatty acid composition may influence bone cell signalling and, potentially, bone mineralization. The objective of this study was to use the fat-1 mouse, a transgenic model that synthesizes n-3 from n-6 PUFA, to determine if the fat-1 gene modulates the fatty acid composition of femoral and vertebral phospholipids, and if so, whether the fatty acid levels would correlate with bone mineral density (BMD) at both skeletal sites. Male and female wild-type and fat-1 mice were fed an AIN93-G diet, containing 10% safflower oil, from weaning to 12 weeks of age. The fatty acid composition of femoral and vertebral phospholipids was measured by gas liquid chromatography. At 12 weeks of age, phosphatidylcholine, phosphatidylethanolamine, and phosphatidylserine fractions in the vertebrae of fat-1 mice had a significantly lower n-6/n-3 ratio than wild-type mice (p < 0.05). In fat-1 femurs, these fractions, along with phosphatidylinositol, had a lower n-6/n-3 ratio than wild-type mice (p < 0.001). Docosahexaenoic acid (DHA) was positively correlated with BMD in all fractions in the vertebrae, and in phosphatidylinositol and phosphatidylserine in the femur (p < 0.05). Overall, the fat-1 gene resulted in changes in the fatty acid composition of both femoral and vertebral phospholipids. Significant correlations between DHA and BMD may indicate a positive effect on bone mineralization. Dietary polyunsaturated tatty acid (PUFA) incorporation into bone may alter its metabolism through changes in the Tally acid composition of membrane phospholipids. Alteration of the membrane phospholipid fatly acid composition may influence bone cell signalling and, potentially, bone mineralization. The objective of this study was to use the fat-1 mouse, a transgenic model thai synthesizes n-3 from n-6 PUFA, to determine if the fat-1 gene modulates the fatty acid composition of femoral and vertebral phospholipids, and if so, whether the fatty acid levels would correlate with bone mineral density (BMD) at both skeletal sites. Male and female wild-type and fat-1 mice were fed an A1N93-G diet, containing 10% safflower oil, from weaning to 12 weeks of age. The fatty acid composition of femoral and vertebral phospholipids was measured by gas liquid chromatography. At 12 weeks of age, phosphatidylcholine, phosphatidylethanolamine, and phosphatidyl serine fractions in the vertebrae of fat-1 mice had a significantly lower n-6/n-3 ratio than wild-type mice (p < 0.05). In fat-1 femurs, these fractions, along with phosphatidyl inositol, had a lower n-6/n-3 ratio than wild-type mice (p < 0.001). Docosahexaenoic acid (DHA) was positively correlated with BMD in all fractions in the vertebrae, and in phosphatidylinositol and phosphatidyl serine in the femur (p < 0.05). Overall, the fat-1 gene resulted in changes in the fatty acid composition of both femoral and vertebral phospholipids. Significant correlations between DHA and BMD may indicate a positive effect on bone mineralization. Dietary polyunsaturated fatty acid (PUFA) incorporation into bone may alter its metabolism through changes in the fatty acid composition of membrane phospholipids. Alteration of the membrane phospholipid fatty acid composition may influence bone cell signalling and, potentially, bone mineralization. The objective of this study was to use the fat-1 mouse, a transgenic model that synthesizes n-3 from n-6 PUFA, to determine if the fat-1 gene modulates the fatty acid composition of femoral and vertebral phospholipids, and if so, whether the fatty acid levels would correlate with bone mineral density (BMD) at both skeletal sites. Male and female wild-type and fat-1 mice were fed an AIN93-G diet, containing 10% safflower oil, from weaning to 12 weeks of age. The fatty acid composition of femoral and vertebral phospholipids was measured by gas liquid chromatography. At 12 weeks of age, phosphatidylcholine, phosphatidylethanolamine, and phosphatidylserine fractions in the vertebrae of fat-1 mice had a significantly lower n-6/n-3 ratio than wild-type mice (p < 0.05). In fat-1 femurs, these fractions, along with phosphatidylinositol, had a lower n-6/n-3 ratio than wild-type mice (p < 0.001). Docosahexaenoic acid (DHA) was positively correlated with BMD in all fractions in the vertebrae, and in phosphatidylinositol and phosphatidylserine in the femur (p < 0.05). Overall, the fat-1 gene resulted in changes in the fatty acid composition of both femoral and vertebral phospholipids. Significant correlations between DHA and BMD may indicate a positive effect on bone mineralization.Original Abstract: L'integration des acides gras polyinsatures (PUFA) alimentaires dans le tissu osseux peut affecter le metabolisme par alteration de la composition en acides gras des phospholipides de la membrane. La modification de la composition en acides gras des phospholipides membranaires pourrait influencer la signalisation dans les cellules osseuses et, de ce fait, la mineralisation des os. Cette etude se propose de verifier chez la souris fat-1, une souris transgenique pouvant synthetiser des PUFA (n-3) a partir de PUFA (n-6) si le gene de la souris fat-1 module la composition en acides gras des phospholipides de la membrane osseuse du femur et des vertebres et, le cas echeant, de determiner la correlation entre la concentration d'acides gras et la densite minerale osseuse (BMD) dans les deux os. On soumet des souris males et femelles de type sauvage et de type fat-1 a une diete AIN93-G contenant 10 % d'huile de carthame depuis la periode de sevrage jusqu'a l'age de 12 semaines. On mesure la composition en acides gras des phospholipides femoraux et vertebraux par chromatographie en phase gazeuse. A la douzieme semaine, la phosphatidylcholine, la phosphatidylethanolamine et la phosphatidylserine des vertebres des souris fat-1 presentent un ratio n-6/n-3 significativement inferieur a celui des souris de type sauvage (p < 0,05). Dans les femurs des souris de type fat-1, on observe le meme phenomene en plus de noter un plus faible ratio n-6/n-3 dans le phosphatidylinositol (p < 0,001) que chez les souris de type sauvage. La concentration d'acide docosahexaenoieque (DHA) est positivement associee a la BMD des vertebres et il en est de meme des concentrations de phosphatidylinositol et de phosphatidylserine en ce qui concerne la BMD du femur (p < 0,05). Globalement, le gene fat-1 suscite des modifications de la composition en acides gras des phospholipides membranaires du femur et des vertebres. Les correlations significatives entre la concentration de DHA et la BMD indiquent des effets potentiels positifs sur la mineralisation. |
Abstract_FL | L'intégration des acides gras polyinsaturés (PUFA) alimentaires dans le tissu osseux peut affecter le métabolisme par altération de la composition en acides gras des phospholipides de la membrane. La modification de la composition en acides gras des phospholipides membranaires pourrait influencer la signalisation dans les cellules osseuses et, de ce fait, la minéralisation des os. Cette étude se propose de vérifier chez la souris fat-1, une souris transgénique pouvant synthétiser des PUFA (n-3) à partir de PUFA (n-6) si le gène de la souris fat-1 module la composition en acides gras des phospholipides de la membrane osseuse du fémur et des vertèbres et, le cas échéant, de déterminer la corrélation entre la concentration d'acides gras et la densité minérale osseuse (BMD) dans les deux os. On soumet des souris mâles et femelles de type sauvage et de type fat-1 à une diète AIN93-G contenant 10 % d'huile de carthame depuis la période de sevrage jusqu'à l'âge de 12 semaines. On mesure la composition en acides gras des phospholipides fémoraux et vertébraux par chromatographie en phase gazeuse. A la douzième semaine, la phosphatidylcholine, la phosphatidyléthanolamine et la phosphatidylsérine des vertèbres des souris fat-1 présentent un ratio n-6/n-3 significativement inférieur à celui des souris de type sauvage (p < 0,05). Dans les fémurs des souris de type fat-1, on observe le même phénomène en plus de noter un plus faible ratio n-6/n-3 dans le phosphatidylinositol (p < 0,001) que chez les souris de type sauvage. La concentration d'acide docosahexaénoïque (DHA) est positivement associée à la BMD des vertèbres et il en est de même des concentrations de phosphatidylinositol et de phosphatidylsérine en ce qui concerne la BMD du fémur (p < 0,05). Globalement, le gène fat-1 suscite des modifications de la composition en acides gras des phospholipides membranaires du fémur et des vertèbres. Les corrélations significatives entre la concentration de DHA et la BMD indiquent des effets potentiels positifs sur la minéralisation. |
Audience | Academic |
Author | Ma, David W.L Kang, Jing X Lau, Beatrice Y.Y Ward, Wendy E |
Author_xml | – sequence: 1 givenname: Beatrice Y.Y surname: Lau fullname: Lau, Beatrice Y.Y organization: Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, ON M5S 3E2, Canada – sequence: 2 givenname: Wendy E surname: Ward fullname: Ward, Wendy E organization: Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, ON M5S 3E2, Canada – sequence: 3 givenname: Jing X surname: Kang fullname: Kang, Jing X organization: Department of Medicine, Harvard Medical School, Boston, MA, USA – sequence: 4 givenname: David W.L surname: Ma fullname: Ma, David W.L email: davidma@uoguelph.ca organization: Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, ON M5S 3E2, Canada |
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Snippet | Dietary polyunsaturated fatty acid (PUFA) incorporation into bone may alter its metabolism through changes in the fatty acid composition of membrane... Dietary polyunsaturated tatty acid (PUFA) incorporation into bone may alter its metabolism through changes in the Tally acid composition of membrane... |
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Title | Fat-1 gene modulates the fatty acid composition of femoral and vertebral phospholipids |
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