Modulation of lipid metabolism by n−3 polyunsaturated fatty acids in gestational diabetic rats and their macrosomic offspring

2005 ◽  
Vol 109 (3) ◽  
pp. 287-295 ◽  
Author(s):  
Nassima A. Soulimane-Mokhtari ◽  
Baya Guermouche ◽  
Akadiri Yessoufou ◽  
Myrieum Saker ◽  
Kebirou Moutairou ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Adipose Tissue ◽  
Lipid Metabolism ◽  
Polyunsaturated Fatty Acids ◽  
Time Course ◽  
Serum Insulin ◽  
Postnatal Growth ◽  
Diabetic Rats ◽  
Glucose Levels ◽  
Diabetic Mothers

The time course of changes in lipid metabolism by dietary n−3 PUFAs (polyunsaturated fatty acids) in streptozotocin-induced diabetic rats during pregnancy (days 12 and 21) and their macrosomic offspring at birth (day 0) and through adulthood (days 60 and 90) was studied with respect to adipose tissue, liver and serum lipid concentrations, and fatty acid composition. Glucose and insulin levels were also assessed in order to characterize the diabetic state of macrosomic offspring. Pregnant diabetic and control rats were fed either an Isio-4 or EPAX diet (enriched with n−3 PUFA). The same diets were also consumed by pups at weaning. Compared with control rats, during pregnancy diabetic rats had a significant elevation in liver and serum triacylglycerol (triglyceride) and cholesterol concentrations. At birth, macrosomic pups had higher serum insulin and glucose levels than control pups. The macrosomic rats maintained accelerated postnatal growth combined with high adipose tissue weight and lipid content through the first 12 weeks of age. The macrosomic pups from diabetic rats fed the Isio-4 diet also showed a significant enhancement in liver and serum triacylglycerol and cholesterol levels at birth and during adulthood. Feeding the EPAX diet to diabetic mothers as well as their macrosomic pups increased serum and liver levels of EPA (eicospentaenoic acid) and DHA (docosahexaenoic acid) with a reduction in arachidonic acid. The EPAX diet induced a significant decrease in liver and serum triacylglycerol and cholesterol concentrations in mothers during pregnancy and in their macrosomic pups during adulthood. Since the EPAX diet improves lipid anomalies considerably in diabetic mothers and their macrosomic offspring, it may prevent long-term metabolic abnormalities associated with macrosomia.

Implication of lipids in macrosomia of diabetic pregnancy: can n-3 polyunsaturated fatty acids exert beneficial effects?

2003 ◽  
Vol 105 (5) ◽  
pp. 519-529 ◽  
Author(s):  
Hafida MERZOUK ◽  
Naim A. KHAN
Keyword(s):  
Fatty Acids ◽  
Lipid Metabolism ◽  
Polyunsaturated Fatty Acids ◽  
Plasma Lipids ◽  
Diabetic Pregnancy ◽  
Infants Of Diabetic Mothers ◽  
Beneficial Effects ◽  
Obesity And Diabetes ◽  
Diabetic Mothers

Macrosomia or fetal obesity is a frequent complication of pregnancy in diabetes mellitus. Several alterations observed in carbohydrate and lipid metabolism in macrosomic infants of diabetic mothers are thought to be a consequence of maternal hyperglycaemia leading to fetal hyperinsulinaemia. Macrosomic infants of diabetic mothers are prone to the development of glucose intolerance, obesity and diabetes during childhood and adulthood. Furthermore, increasing evidence is accumulating regarding the importance of n-3 polyunsaturated fatty acids (PUFAs) in the reduction of plasma lipids and hyperglycaemia. In this review article, we shed light on the abnormalities in lipid metabolism in macrosomia. We also raise the question of the possible beneficial effects of n-3 PUFAs in diabetic pregnancy and in the prevention and treatment of long-term metabolic abnormalities associated with macrosomia.

Time course of incorporation of n-3 PUFA from linseed in pigs and effects on D9-desaturase activity and pork odours

2001 ◽  
Vol 2001 ◽  
pp. 71-71
Author(s):  
M. Kouba ◽  
M. Enser ◽  
G.R. Nute ◽  
F.M. Whittington ◽  
J.D. Wood ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Adipose Tissue ◽  
Polyunsaturated Fatty Acids ◽  
Time Course ◽  
Desaturase Activity ◽  
Monounsaturated Fatty Acids ◽  
Lipid Classes ◽  
Inhibitory Effects ◽  
Tissue Lipids ◽  
Feeding Sources

The n-3 polyunsaturated fatty acids (PUFA) are healthy nutrients which can be increased in pork by feeding sources such as linseed to the growing animal. The levels achieved depend on many factors such as the concentrations of lipid classes in tissues (eg phospholipids containing high PUFA levels are more abundant in muscle than adipose tissue) competition for incorporation with n-6 PUFA and possible inhibitory effects of PUFA on synthesis of saturated and monounsaturated fatty acids. This study examined the time course of the incorporation of n-3 PUFA into tissue lipids and the effects on the major synthetic enzyme D9-desaturase. The effects on pork odour were also studied.

scholarly journals Effects of Different Doses of Metformin on Serum Fatty Acid Composition in Type 2 Diabetic Rats

2017 ◽  
Vol 5 (1) ◽  
pp. 22-28
Author(s):  
Nazi Aghaalikhani ◽  
Mohammad Taghi Goodarzi ◽  
Zeinab Latifi ◽  
Azam Rezaei Farimani ◽  
Amir Fattahi
Keyword(s):  
Fatty Acids ◽  
Arachidonic Acid ◽  
Fatty Acid ◽  
Linoleic Acid ◽  
Unsaturated Fatty Acids ◽  
Serum Insulin ◽  
Diabetic Rats ◽  
Glucose Levels ◽  
Different Doses

Background: Several studies have shown association of fatty acids with type 2 diabetes (T2D), as well as metformin effects on blood glucose concentrations through affecting lipid metabolism. Objectives: Since the exact therapeutic mechanism of metformin is not clear, in this study we investigated effects of different doses of metformin on serum fatty acids in rats with T2D. Materials and Methods: Twenty-five adult albino male Wistar rats were divided into the following groups: Healthy, untreated T2D, and T2D rats receiving metformin for 4 weeks with doses of 100, 150, and 200 mg/kg/d. Serum insulin and triglyceride (TG) were measured using commercial kits. Serum total lipids were extracted by the Bligh-Dyer method and then compositions of fatty acids were evaluated using gas chromatograph. Results: Monounsaturated fatty acid (MUFA) levels in T2D rats were lower than those in healthy rats (P < 0.05). We also observed that diabetic rats treated with 100 or 150 mg/kg/d of metformin had higher levels of arachidonic acid and polyunsaturated fatty acids (PUFA) in comparison with the healthy group (P < 0.05). Moreover, the T2D+Met (150 mg/kg) group showed increased levels of MUFA compared with the T2D group. Such a difference was seen in levels of arachidonic acid between the T2D+Met 100 mg/ kg group and untreated T2D group. In the group treated with high doses of metformin (200 mg/kg/d), levels of palmitic acid, palmitoleic acid, and saturated fatty acid (SFA) were higher and levels of oleic acid, linoleic acid, arachidonic acid, MUFA, PUFA, and also SFA/UFA ratio were lower compared with other metformin treated and untreated groups (P < .05). In untreated T2D group, there were positive correlations between glucose levels and linoleic acid and PUFA levels (r = 0.707, P = .049 and r = 0.726, P = .041 respectively). Arachidonic acid levels were positively correlated with glucose levels in T2D rats treated with 100 mg/kg/d of metformin (r = 0.969, P = .031). Conclusions: Our study showed that different doses of metformin could have different effects on serum levels of saturated and unsaturated fatty acids, as 200 mg/kg/d of metformin could increase and decrease saturated and unsaturated fatty acids respectively, while lower doses increased unsaturated fatty acids, particularly arachidonic acid.

Effects of cold acclimation on lipid metabolism in adipose tissue

1961 ◽  
Vol 200 (4) ◽  
pp. 847-850 ◽  
Author(s):  
Judith K. Patkin ◽  
E. J. Masoro
Keyword(s):  
Fatty Acids ◽  
Adipose Tissue ◽  
Fatty Acid ◽  
Lipid Metabolism ◽  
Cold Acclimation ◽  
Long Chain Fatty Acids ◽  
Synthetic Capacity ◽  
And Control ◽  
Long Chain ◽  
Chain Fatty Acids

Cold acclimation is known to alter hepatic lipid metabolism. Liver slices from cold-acclimated rats have a greatly depressed capacity to synthesize long-chain fatty acids from acctate-1-C14. Since adipose tissue is the major site of lipogenic activity in the intact animal, its fatty acid synthetic capacity was studied. In contrast to the liver, it was found that adipose tissue from the cold-acclimated rat synthesized three to six times as much long-chain fatty acids per milligram of tissue protein as the adipose tissue from the control rat living at 25°C. Evidence is presented indicating that adipose tissue from cold-acclimated and control rats esterify long-chain fatty acids at the same rate. The ability of adipose tissue to oxidize palmitic acid to CO2 was found to be unaltered by cold acclimation. The fate of the large amount of fatty acid synthesized in the adipose tissue of cold-acclimated rats is discussed.

Effects of cortisol and progesterone on insulin binding and lipogenesis in adipocytes from normal and diabetic rats

1985 ◽  
Vol 106 (2) ◽  
pp. 225-231 ◽  
Author(s):  
A.-M. Mendes ◽  
R. J. Madon ◽  
D. J. Flint
Keyword(s):  
Body Weight ◽  
Adipose Tissue ◽  
Insulin Sensitivity ◽  
Insulin Receptor ◽  
Body Weight Gain ◽  
Serum Insulin ◽  
Insulin Binding ◽  
Serum Glucose ◽  
Diabetic Rats ◽  
Receptor Concentration

ABSTRACT Cortisol implants in normal and diabetic rats reduced body weight, adiposity, insulin receptor concentration and both basal and insulin-stimulated rates of lipogenesis in isolated adipocytes, whilst insulin sensitivity was unchanged. In normal but not diabetic rats these changes were accompanied by increased serum glucose and insulin concentrations. In contrast, progesterone implants in normal and diabetic rats increased body weight gain, adiposity, insulin receptor concentration and both basal and insulin-stimulated rates of lipogenesis in adipose tissue, again without affecting insulin sensitivity. Progesterone did not affect serum insulin concentrations in normal or diabetic rats but accelerated the decline in serum glucose concentrations which occurred during an overnight fast in diabetic rats. The results suggest that (1) cortisol inhibits lipogenesis in adipose tissue without affecting insulin sensitivity, (2) cortisol reduces insulin binding in adipose tissue without a requirement for hyperinsulinaemia, which might itself indirectly lead to down-regulation of the insulin receptor, and (3) in diabetic rats progesterone stimulates lipogenesis in adipose tissue without any increase in food intake or serum insulin concentrations suggesting that progesterone may have a direct anabolic role in adipose tissue. J. Endocr. (1985) 106, 225–231

Adipose tissue polyunsaturated fatty acids and metabolic syndrome among adult parents and their children

2018 ◽  
Vol 28 (12) ◽  
pp. 1237-1244 ◽  
Author(s):  
K.S. Flannagan ◽  
M. Ramírez-Zea ◽  
A.V. Roman ◽  
A.K. Das ◽  
E. Villamor
Keyword(s):  
Metabolic Syndrome ◽  
Fatty Acids ◽  
Adipose Tissue ◽  
Polyunsaturated Fatty Acids

scholarly journals Fatty acid composition of subcutaneous and intramuscular adipose tissue in east Balkan pigs

2015 ◽  
Vol 31 (4) ◽  
pp. 543-550 ◽  
Author(s):  
T. Popova ◽  
J. Nakev ◽  
Y. Marchev
Keyword(s):  
Fatty Acids ◽  
Adipose Tissue ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Polyunsaturated Fatty Acids ◽  
Acid Composition ◽  
Subcutaneous Fat ◽  
Intramuscular Fat ◽  
Longissimus Dorsi ◽  
Intramuscular Adipose Tissue

The aim of this study was to provide information on the fatty acid profile of different adipose depots - subcutaneous (upper and inner backfat layers) and intramuscular (m. Longissimus dorsi) in East Balkan pigs. The animals were reared in free-range conditions and slaughtered at an average live weight of 107?1.65kg. The results of the study showed that the various adipose tissues in pigs have different lipid metabolism and hence differ in their fatty acid composition. Intramuscular fat had significantly higher content of the saturated C16:0 and C18:0 (P<0.001), as well as the C16:1 (P<0.001) than the subcutaneous fat. In regards to the content of the polyunsaturated fatty acids, the latter displayed considerably higher content of both C18:2 and C18:3 (P<0.001) in comparison to the intramuscular fat in m. Longissimus dorsi. The differences between the subcutaneous and intramuscular adipose tissue in the individual fatty acids determined the similar trend of change in the total content of saturated and polyunsaturated fatty acids. Significant differences between the backfat layers were detected for C16:1, C18:0 and C18:3 (P<0.001). Stearic acid (C18:0) displayed higher content of the inner, while both C16:1 and C18:3 had higher proportion in the outer backfat layer in the East Balkan pigs. Except for C20:2, the long chain polyunsaturated n-6 and n-3 fatty acids had significantly higher proportions in the intramuscular fat, however no differences were determined between the two backfat layers.

Induction of Ca-independent PLA2 and conservation of plasmalogen polyunsaturated fatty acids in diabetic heart

2000 ◽  
Vol 279 (1) ◽  
pp. E25-E32 ◽  
Author(s):  
Jane McHowat ◽  
Michael H. Creer ◽  
Kristine K. Hicks ◽  
Janet H. Jones ◽  
Raetreal McCrory ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Polyunsaturated Fatty Acids ◽  
Phospholipid Composition ◽  
Phospholipid Metabolism ◽  
Diabetic Rats ◽  
Phospholipid Content ◽  
Diabetic Patients ◽  
Phospholipid Hydrolysis ◽  
Induced Changes ◽  
Docosahexaenoic Acids

Diabetes-induced changes in phospholipase A2(PLA2) activity have been measured in several tissues but are undefined in diabetic myocardium. We measured ventricular PLA2 activity in control, streptozotocin-induced diabetic, and insulin-treated diabetic rats and characterized myocardial phospholipids to determine whether diabetes altered myocardial phospholipid metabolism. Increased membrane-associated Ca2+-independent PLA2 (iPLA2) activity was observed in diabetes that was selective for arachidonylated phospholipids. Increased iPLA2 activity was accompanied by an increase in choline lysophospholipids. Diabetes was associated with marked alterations in the phospholipid composition of the myocardium, characterized by decreases in esterified arachidonic and docosahexaenoic acids and increases in linoleic acid. The decrease in polyunsaturated fatty acids was confined to diacylphospholipids, whereas the relative amount of these fatty acids in plasmalogens was increased. Diabetes-induced changes in PLA2 activity, lysophospholipid production, and alterations in phospholipid composition were all reversed by insulin treatment of diabetic animals. Diabetes-induced changes in membrane phospholipid content and phospholipid hydrolysis may contribute to some of the alterations in myocardial function that are observed in diabetic patients.

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