The Role Of Fatty Acids In Insulin Resistance

The Fats Of Life Nutrition News Cover

The Role Of Fatty Acids In Insulin Resistance

New research into insulin resistance reveals that not all organs and receptor sites react in the same ways. This further complicates the problem. How do we ensure optimal levels are achieved and maintained?

This new research by Barry Sears Email author  and Mary Perry peels away another secret of the body’s endless complexity.

The human body has developed an extraordinary number of systems to maintain stable blood glucose and to avoid broad swings in its level. These systems include hormones that are directly or indirectly generated by the diet.

These hormones sense dietary nutrients and send appropriate neural signals to the brain (specifically the hypothalamus) to orchestrate fuel usage for either oxidation into energy or long-term storage. The central hormone involved in this metabolic communication system is insulin.

Insulin resistance is a multi-faceted disruption of the communication between insulin and the interior of a target cell. The underlying cause of insulin resistance appears to be inflammation that can either be increased or decreased by the fatty acid composition of the diet. However, the molecular basis for insulin resistance can be quite different in various organs.
→  Read full article

Olive Oil Protects Liver From Oxidative Stress

Extra-virgin olive oil can protect the liver from oxidative stress. Researchers writing in BioMed Central’s open access journal Nutrition and Metabolism exposed rats to a moderately toxic herbicide known to deplete antioxidants and cause oxidative stress, finding that those rats fed on a diet containing the olive oil were partially protected from the resulting liver damage.

Read full article, notes for editors, see attachments

http://www.alphagalileo.org/ViewItem.aspx?ItemId=88490&CultureCode=en

Mohamed Hammami from the University of Monastir, Tunisia and King Saud University, Riyadh, Saudi Arabia, worked with a team of researchers to carry out the experiments in a group of 80 rats. He said, “Olive oil is an integral ingredient in the Mediterranean diet. There is growing evidence that it may have great health benefits including the reduction in coronary heart disease risk, the prevention of some cancers and the modification of immune and inflammatory responses. Here, we’ve shown that extra virgin olive oil and its extracts protect against oxidative damage of hepatic tissue”.

The researchers separated the rats into a control group, an olive oil group, and 6 groups that were exposed to the herbicide ‘2,4-Dichlorophenoxyacetic acid’ with or without either whole olive oil, or one of two oil extracts – the hydrophilic fraction or the lipophilic fraction. All rats given the herbicide showed signs of significant liver damage. However, extra virgin olive oil and hydrophilic fraction intake induced a significant increase in antioxidant enzyme activity and a decrease in markers of liver damage.

Speaking about the results, Hammami said, “The hydrophilic fraction of olive oil seems to be the effective one in reducing toxin-induced oxidative stress, indicating that hydrophilic extract may exert a direct antioxidant effect on hepatic cells. However, more detailed studies about the effect of antioxidant compounds separately and/or their interactions are necessary to substantiate these observations”.

http://www.nutritionandmetabolism.com/

  • Full bibliographic informationEffects of olive oil and its fractions on oxidative stress and the liver’s fatty acid composition in 2,4-Dichlorophenoxyacetic acid- treated rats Amel Nakbi, Wafa Tayeb, Abir Grissa, Manel Issaoui, Samia Dabbou, Issam Chargui, Meriem Ellouz, Abdelhedi Miled and Mohamed Hammami, Nutrition & Metabolism (in press)
    3. BioMed Central (http://www.biomedcentral.com/) is an STM (Science, Technology and Medicine) publisher which has pioneered the open access publishing model. All peer-reviewed research articles published by BioMed Central are made immediately and freely accessible online, and are licensed to allow redistribution and reuse. BioMed Central is part of Springer Science+Business Media, a leading global publisher in the STM sector.
Superfoods cover image

Play The Is It Healthy Game!

Read Nutrition News

Making Healthy Choices Easier Than You Think

You have Successfully Subscribed!