Fish oil may help with diabetic neuropathy
News May 07, 2015
Approximately 50 percent of patients with diabetes suffer from nerve damage, or neuropathy. No cure exists, and the most effective treatment, keeping blood sugar in control, only slows neuropathy. A new study in the Journal of Neurophysiology, however, introduces a new alternative, omega-3 fatty acids found in fish oil. The study shows that fish oil supplements can restore the condition of nerves damaged from diabetes in mice.
"Diabetic neuropathy is a very costly and debilitating complication of diabetes. It is the leading cause of foot ulcers and nontrauma-related amputations, and the impact of diabetic neuropathy on the patient and family are unmeasurable," said Mark Yorek of the VA Medical Center in Iowa City, the study's lead investigator. Fish oil is an attractive treatment approach because "supplements are considered very safe and could be easily translated into everyday care. Fish oil would be easy to take, like a vitamin, and should have few side effects when combined with other medications," explained Yorek.
Previous studies of obesity and diabetes have reported better blood sugar handling, liver function and reduced inflammation with omega-3 fatty acids treatment. The health benefits were attributed to protective molecules produced from omega-3 fatty acids, including one type called resolvins. The research group had previously observed that diets enriched with omega-3 fatty acids from fish oil improved diabetic neuropathy in rats with Type 1 and Type 2 diabetes, and in this new study they examined why.
Researchers used a mouse model of diabetes to study the effect of fish oil. Diabetic mice were fed a high-fat diet and treated with daily injections of resolvin or given a high-fat diet in which half the fat came from fish oil. The results were compared to healthy, non-diabetic mice.
The researchers found that untreated diabetic mice had diminished sense of touch in their paws that corresponded to fewer nerves in the paw's skin and slower transmission of signals along the nerves. The eyes of untreated diabetic mice also had fewer nerves. Though dietary fish oil and resolvin did not lower glucose levels closer to healthy range, they improved nerve health in terms of density and sensory signal transmission. The researchers also observed that resolvin stimulated nerve cells to grow."Even though a lot more work needs to be done, including clinical trials with human subjects, our animal studies suggest that fish oil can reverse some of the harmful effects of diabetes on the nerves. Our intent is to do more animal studies to demonstrate that fish oil treatment can reverse the harmful effects of diabetes on nerves even after a long period of poorly controlled diabetes. After completion of this work, we hope to begin studies with diabetic patients with neuropathy," Yorek said.
Note: Material may have been edited for length and content. For further information, please contact the cited source.
Hanna Shevalye, Matthew S. Yorek, Lawrence J. Coppey, Amey Holmes, Matthew M. Harper, Randy H. Kardon, Mark A. Yorek. Effect of enriching the diet with menhaden oil or daily treatment with resolvin D1 on neuropathy in a mouse model of type 2 diabetes. Journal of Neurophysiology, Published April 29 2015. doi: 10.1152/jn.00224.2015
Combination Chemotherapy Could Significantly Improve Deadly Brain Tumor TreatmentNews
A team led by Massachusetts General Hospital (MGH) investigators has found that adding the chemotherapy drug hydroxyurea to the current chemotherapy protocol for glioblastoma significantly increased survival in animal models.READ MORE
Purine Synthesis in Neuron-Like Cells InvestigatedNews
Neuron-like cells created from a readily available cell line have allowed researchers to investigate how the human brain makes a metabolic building block essential for the survival of all living organisms.READ MORE
All in a Droplet: Atomic Resolution of ALS Protein ResolvedNews
Researchers have described atom-by-atom changes in a family of proteins linked to amyotrophic lateral sclerosis (ALS), a group of brain disorders known as frontotemporal dementia and degenerative diseases of muscle and bone.READ MORE