It's been bothering me lately that Jack LaLanne died from pneumonia at age 96. He tried to optimize his lifestyle for health and what he thought was longevity, but was done in by his own immune system. It's one of the leading causes of death for the elderly.
http://en.wikipedia..../Cytokine_storm
This is what I think happened, but I'd like to hear other people's opinions too.When the immune system is fighting pathogens, cytokines signal immune cells such as T-cells and macrophages to travel to the site of infection. In addition, cytokines activate those cells, stimulating them to produce more cytokines.[2] Normally, this feedback loop is kept in check by the body. However, in some instances, the reaction becomes uncontrolled, and too many immune cells are activated in a single place. The precise reason for this is not entirely understood but may be caused by an exaggerated response when the immune system encounters a new and highly pathogenic invader. Cytokine storms have potential to do significant damage to body tissues and organs. If a cytokine storm occurs in the lungs, for example, fluids and immune cells such as macrophages may accumulate and eventually block off the airways, potentially resulting in death.
The first lesson I learn is that exercise alone will not prevent immune system aging, or even really slow it down. Secondly, mild restriction of calories and elimination of junk food doesn't work effectively to improve immune system health. Another 20-30 years or so of calorie restriction experience should tell us if further optimization of diet will be effective.
One idea might be to wipe out some of the immune system periodically thru life, and then re-seed with stem cells that don't have memory of past infections. Or could a person store a sample of stem cells for a few decades, then culture them later to give an immune system health boost?
Further ideas? Has anyone run across some research that might point to a potential solution?