Self renewal: 10 hard facts 🙌

Hello everyone 🖖

1. The human body in which each of us lives is made up of around 37 trillion cells, to be precise. And every day, about 1-2 percent of the cells are renewing. So, exactly after 90–100 days, a new “me” appears. We remain so busy with our routine lives that we hardly acknowledge this fact, and many of us are not even aware of it. So, ‘change’ is the constant tune, not just within the universe but also within us.

2. Now that we understand that our bodies undergo transformation on a daily basis, So, the question is: how does this self-renewal occur? Let’s go back to our past a little bit. The human body develops from the human embryo, which is fertilized by an oocyte and a sperm cell. This embryo is made up of stem cells. The stem cells are the basic cells (undifferenciated cells) of the human body, which, through the process of mutation and transformation grow into different cells like nerve cells, bone cells, muscle cells, blood cells and so on. Throughout our lifespan, these stem cells undergo cell division and keep replicating; that’s how self-renewal happens.

3. Under normal physiological self-renewal processes, different cells in the body have differing rates of cell division. So, the replication process of various tissues, organs, and blood cells in the body has a different time frame, like the skin epidermal cells, which can take around 10–30 days, whereas a bone cell takes 3 months, or a hair grows about 1 cm in one month, and so on.

4. Though our body is constantly changing due to the continuous self-renewal process through different cell cycles like shedding the old skin cells, renewal of intestinal cell lining, and growing hair or nails on a routine basis, this isn’t a simpler process. The human body is still very complicated and has exceptions. Some cells, such as those in the brain (cerebral cortex), eyes (such as lenses), and heart, do not change from birth to death.

5. But then, why is self-renewal important and must be maintained? Under normal physiological conditions, stem cells have two functions: proliferation and differentiation. Though stem cells have a natural proliferative capacity throughout our lives, disease conditions can affect their physiological self-renewal ability and behavior due to factors such as damage or an unhealthy lifestyle (obesity, lack of physical activity, smoking, or a poor diet).

6. A lack of an appropriate environment within the body or poor maintenance of the human body might eventually lead to the exhaustion of the capacity of stem cell proliferation, which causes premature aging or tissue atrophy. With aging, stem cell activity, tissue regenerative and haemeostasis is significantly declined.

7. Sometime, due to the unhealthy environment within the body, mutations lead to aggressive stem cell division without going through the natural cell differentiation process. This can lead to abnormal tissue growth or cancer in the body. Therefore, the physiological process of stem cell division and the natural stem cell behavior can be affected by four disease conditions, like degenerative, metabolic, cardiovascular, and inflammatory conditions.

8. Regenerative medicine and therapies have arisen as a result of the discovery that defective self-renewal mechanisms in the body are the root cause of malignancies and abnormal cell proliferation. Many disorders are being treated with regenerative medicines based on stem cells. Recent years have seen a significant increase in the use of stem cell treatment to treat a variety of diseases like cancer and disorders including type 1 diabetes, heart disease, stroke, Parkinson’s, burns, osteoarthritis, by regenerating cells, repairing tissues, and transplanting organs.

9. The fact about regenerative medicine is that, though it has helped many patients around the world, the cost of treatment is quite high as the procedure is complicated and the failure rate is high. Human stem cell treatment requires culturing human stem cells in a laboratory setting for a longer period of time, which is quite difficult.

10. The market is flooded with products that promote cell regeneration, anti-aging, and longevity. The lofty claims made by these items are still quite dubious. But it is true that some supplements do work to improve health, lower inflammation, and increase immunity. But in the end, having a healthy diet, getting enough sleep, a calm mind, and exercising regularly is all that’s necessary for good health.

Thanks for reading.

Peace and love 🙏

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