Marios Dimopoulos Clinical Nutritionist, Author, Fellow of the American Council of the Applied Clinical Nutrition

Κυριακή, 9 Φεβρουαρίου 2014

Tocotrienol stops kidney damage from diabetes

Kidney damage resulting from diabetes is a long term and common consequence of the problem.  A new animal study shows that the tocotrienol form of vitamin E was able to stop the kidney damage by regulating inflammatory gene signals at the most fundamental level.  This is further evidence that tocotrienols are far and away the most effective form of vitamin E.
The evidence showed that tocotrienols favorably modulated immune signals that induce tissue damage to the kidneys during diabetes, as well as reducing oxidative stress, chronic inflammation, and preventing death in kidney cells.
The ability of tocotrienols to favorably modulate NF-kappa B, the key gene signal that is fundamental to inflammation, makes them a top choice for health in general.  The fact that they can exert such a powerful positive influence in a condition that is troublesome to so many people is very good news.

 Kuhad A, Chopra K. Attenuation of diabetic nephropathy by tocotrienol: involvement of NFkB signaling pathway. Life Sci.   2009 February  84(9-10):296-301.
Pharmacology Research Laboratory, University Institute of Pharmaceutical Sciences, UGC Centre of Advanced Study, Panjab University, Chandigarh-160 014, India.

Study Abstract:

AIM: Diabetic nephropathy is a serious complication for patients with diabetes mellitus. Approximately 30-40% of patients with type I and 15% with type II diabetes mellitus develop end stage renal disease. The study was designed to evaluate the impact of tocotrienol on renal function and reno-inflammatory cascade in streptozotocin-induced diabetes. MAIN METHODS: Streptozotocin (STZ)-induced diabetic rats were treated with tocotrienol (25, 50 and 100 mg/kg), alpha-tocopherol (100 mg/kg) or with vehicle form 5th to 8th weeks. After 8 weeks, urine albumin excretion, urine output, serum creatinine, blood urea nitrogen, creatinine and urea clearance were measured. Cytoplasmic and nuclear fractions of kidney was prepared for the quantification of oxidative-nitrosative stress (lipid peroxidation, superoxide dismutase, catalase, non protein thiols, total nitric oxide), tumor necrosis factor-alpha (TNF-alpha), tissue growth factor-1beta (TGF-beta1), p65 subunit of NFkappabeta and caspase-3. KEY FINDINGS: After 8 weeks of STZ injection, the rats produced significant alteration in renal function, increased oxidative-nitrosative stress, TNF-alpha, TGF-beta1, caspase-3 activity in cytoplasmic lysate and active p65 subunit of NFkappabeta in nuclear lysate of kidney of diabetic rats. Interestingly, co-administration of tocotrienol significantly and dose-dependently prevented biochemical and molecular changes associated with diabetes. Tocotrienol (100 mg/kg) was demonstrated to be more effective than alpha-tocopherol (100 mg/kg). Moreover, diabetic rats treated with insulin-tocotrienol combination produced more pronounced effect on molecular parameters as compared to their respective groups. SIGNIFICANCE: Taken together, the data reveal that tocotrienol modulates the release of profibrotic cytokines, oxidative stress, ongoing chronic inflammation and apoptosis and thus exerts a marked renoprotective effect.

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