What is rapamycin?

Rapamycin is currently one of the most promising and promising "anti-aging drugs", showing longevity effects in various animal models, and even extending the lifespan of mice by three times.

1: What is rapamycin?

In 1964, rapamycin powder was first discovered in a mold found in the soil of Easter Island. Researchers originally intended to use it for antifungal research, but unexpectedly discovered that it has strong immunosuppressive and anti proliferative effects. Subsequently, new research has found that rapamycin can inhibit tumor growth.
In September 1999, the US Food and Drug Administration approved the use of rapamycin as an immunosuppressant for kidney transplantation. Later, it was discovered that at high doses, it could actually enhance the immunity of cancer patients rather than suppress it. In addition, it was unexpectedly found that the immune system of elderly patients treated with high-dose rapamycin was improved.
In 2009, a study funded by the National Institute on Aging in the United States showed that rapamycin could extend the lifespan of mice, particularly by up to 60% of their maximum lifespan.

2：What is the mechanism of action of rapamycin?

Rapamycin targets a protein called rapamycin mammalian target (mTOR) and inhibits it. Since mTOR is an important component of cellular metabolism and synthesis signaling pathways, inhibiting mTOR is equivalent to inhibiting cell growth and proliferation.
So for cancer cells, rapamycin can prevent their growth and spread, and is currently used as a cancer treatment drug.
In the treatment of rejection reactions in kidney transplant patients, rapamycin exerts immunosuppressive effects by inhibiting mTOR, preventing patients from rejecting the donor kidney.
In addition, in the treatment of cardiovascular diseases, rapamycin is also used to wrap heart stents to prevent arterial blockage.

3: Can Rapamycin Resist Aging?

Animal experiments have shown that pure rapamycin can increase lifespan and healthy lifespan.
During the aging process, damaged and dysfunctional proteins and organelles gradually accumulate in the body, and when they accumulate to a certain extent, cells will die.
Cells are the fundamental units of life. To extend lifespan, it is necessary to maintain the normal functioning of physiological activities within cells and promptly clean up damaged and dysfunctional substances in the cells (this process is called autophagy).
Rapamycin promotes autophagy by blocking the mTOR pathway, thus playing a crucial role in maintaining cell health and promoting cell lifespan.

4：What is the current research on the effect of rapamycin?

German researchers published a study in August this year stating that low-dose rapamycin administration can prolong the lifespan of fruit flies in early life. In addition, it can also reduce intestinal cell damage, prevent aging related intestinal stem cell exhaustion, underdevelopment, and loss of barrier function, and the drug's effect lasts for life.
Researchers observed a significant increase in autophagy during the administration of rapamycin. The mTOR pathway in fruit flies is disrupted, leading to an extension of cell lifespan. And even after discontinuing the drug and restoring mTOR levels to normal, the autophagy process continues, and the fruit fly body seems to form a "rapamycin memory". In addition, this "low-dose rapamycin administration in early life" also produces the same "lifelong memory effect" in mice.

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