Jul
01
2017

Advanced Glycation End Products (AGEs)

Advanced glycation end products (AGEs) form when food is cooked at high temperatures. Sugar molecules react with proteins crosslinking them and changing how they function. It prevents proteins from doing their job. Glycation also causes inflammation, which damages mitochondria, the power packages inside cells that provide the body with energy. Overall AGEs lead to premature aging, which comes from the toxic protein reactions. Advanced glycation end products accumulate as glycated proteins in the tissues of the body. This leads to mitochondrial dysfunction.

Effect of advanced glycation end products (AGEs) on the body

The following tissues are frequently affected by the toxic effect of AGEs.

  • The accumulation of AGEs can cause kidney disease and kidney failure (renal failure). In this case the kidneys no longer filter the blood to excrete waste. Hemodialysis may be required.
  • Joint cartilage is damaged by AGEs so it can no longer handle stress and joint stiffness sets in. AGEs are now recognized as a major cause of osteoarthritis.
  • Cross-linked proteins from AGEs can cause Alzheimer’s and Parkinson’s disease. Damaged proteins accumulate in brain cells that disable and kill them eventually.
  • Glycation of LDL particles has been well documented as an important cause of increasing the plaque formation in arteries by LDL. Glycated LDL is much more susceptible to oxidation than regular LDL. Oxidized LDL causes damage to the lining of the arteries and destroys endothelial nitric oxide synthase. This is a critical enzyme, which is involved in maintaining vasodilatation and blood flow. Once LDL has become glycated, it is deformed and LDL receptors can no longer recognize it. This means that glycated LDL continues to circulate in the bloodstream where it contributes to the atherosclerotic process. It forms a plaque which becomes a reason for heart attacks and strokes. Glycation of LDL is particularly common in patients with diabetes.
  • Glycation of the skin sensitizes the skin to UV light damage. It triggers oxidative stress that increases the risk of skin cancer.
  • Glycation damages our eyes. It causes clouding of the lens (cataracts) and it damages the retina. Macular degeneration can ultimately cause blindness.
  • When glycation affects the discs in the spinal cord, this can cause disc protrusions and disc herniations. Often the spinal nerves that are nearby get injured causing limping and leg or arm weakness.

Nutrients to counter AGEs

There are nutrients that can slow down the rate of glycation and as a result will halt the aging process.

Benfotiamine

Benfotiamine is a fat-soluble form of the water-soluble vitamin B1 (thiamine). It has been shown to reverse glycation in cell cultures and in humans.

As a result the damage to the cells that are lining arteries is reduced. Benfotiamine also counters diabetic neuropathy, retinopathy and nephropathy.

Pyridoxal 5’-phosphate

Pyridoxal 5’-phosphate is a metabolite of vitamin B6. It is similar to benfotiamine in that it counters glycation and dissolves deposited AGEs. It is particularly useful to stop fat and protein glycation. In diabetic patients lipid glycation is often a problem as these authors have shown. Pyridoxal 5’-phosphate traps glucose breakdown products before they become part of glycation reactions.

Carnosine

Carnosine is a dipeptide, made up of the amino acids histidine and beta-alanine. It is found in higher concentration in muscle and brain tissue. It scavenges for free radicals and prevents AGE formation. It is preventing both lipid glycation and protein glycation. This publication states that carnosine can play a role in preventing Alzheimer’s disease. As protein crosslinking is prevented with carnosine, tangled protein clumps cannot accumulate and cause Alzheimer’s disease.

Carnosine also reduces blood lipid levels and stabilizes atherosclerotic plaques. This reduces the risk of plaque rupture, which can cause a heart attack or stroke.

Carnosine also has a mitochondria stabilizing function resisting the destructive effects of oxidative stresses.

Luteolin

Luteolin is a bioflavonoid, which can be found in many plants. It has anti-inflammatory effects and works by suppressing the master inflammatory complex, called NF-kB.  NF-kB triggers the production of multiple cytokines and is associated with many cancers, chronic diseases, autoimmune diseases and septic shock. Kotanidou et al. did an experiment where they injected mice with Salmonella enteritis toxin, either with or without luteolin protection. Without luteolin only 4.1% of the mice survived on day 7. With luteolin protection 48% were alive on day 7.

Luteolin has been shown to be effective as an anti-inflammatory in the brain, the blood vessel lining, intestines, skin, lungs, bone and gums.

All these four supplements are available in the health food store. They work together and would be recommendable in diabetic patients where glycation is most prominent. But these supplements are also useful for older people who want to slow down the aging process in general.

Nutrients to slow down mitochondrial aging

Glycation is linked to mitochondrial deterioration and dysfunction. It accelerates aging in every aspect. AGEs (advanced glycation end products) crosslink proteins, lipids, but also damage enzymes and DNA. Mitochondrial energy production is slowed down by glycation. The end result is a lack of energy and slower repair processes, which all depend on mitochondrial energy production. The following supplements have shown some merit in reversing this process.

Pyrroloquinoline quinone (PQQ)

PPQ is a supplement that is known to produce new mitochondria in cells. This helps the energy metabolism of aging cells to recover.

Taurine

Taurine is an amino acid that is found abundantly in heart and skeletal muscles cells, brain cells and cells of the retina. These are areas in the body with high metabolic rates that can burn out mitochondria. Taurine regulates enzymes in mitochondria that harvest energy from food substances. In patients who experience accelerated aging, a lack of taurine can produce an energy crisis. But supplementation with taurine can rescue the cells by reducing oxidative stress and restoring the function of mitochondria in cells that are aging. Brain cells were putting out new shoots, called neurites when taurine was given as a supplement. This helps to improve brain connection, and preserves memory and cognition.

R-lipoic acid

R-lipoic acid helps with mitochondrial function by being involved with extracting energy from foods. When R-lipoic acid is given to aging animals, their metabolic function improves, the mitochondria become healthier and there are less oxidative stress-inducing byproducts. It protects their liver, heart and brain cells from oxidative stress in their mitochondria. It is becoming known as an energy-giving supplement.

Advanced Glycation End Products (AGEs)

Advanced Glycation End Products (AGEs)

Conclusion

Sugar overconsumption and overcooking food can cause advanced glycation end products (AGEs) where lipids and proteins get cross-linked. This leads to premature loss of organ function. The mitochondria are also slowed down. This creates prematurely aging. Fortunately there are a few supplements like benfotiamine, pyridoxal 5’-phosphate, carnosine and luteolin. They protect against glycation. Mitochondria can also be protected by PPQ, taurine and R-lipoic acid. Although we cannot stop the aging process, avoiding sugar and stopping to consume overcooked food, such as barbecued meats and deep fried food is a sensible step in prevention.

With this approach and some supplements a lot can be done to slow down aging.

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About Ray Schilling

Dr. Ray Schilling born in Tübingen, Germany and Graduated from Eberhard-Karls-University Medical School, Tuebingen in 1971. Once Post-doctoral cancer research position holder at the Ontario Cancer Institute in Toronto, is now a member of the American Academy of Anti-Aging Medicine (A4M).