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What are “Zombie Cells” and Should You Be Prepping to Fight Them?

Have you ever wondered how our cells manage to keep our bodies functioning optimally? It's all thanks to the remarkable process of cell division. In this article, we'll take a journey into the basics of cell division, exploring its phases and understanding how it influences cellular function and, consequently, our overall health.

Understanding Zombie Cells and Cell Division: The Basics

The cells of your body contain all that is needed to keep your muscles, bones, organs, and even the brain optimally functioning.  To manage it all efficiently, they replicate and divide into new, healthier cells that can continue maintaining bodily function and repair processes.

Cell division is broken down into several phases, each of which serve an important purpose.  You may remember this from high school biology.  Let’s take a trip down memory lane and cover the basics of cell division.  The main question we should be asking ourselves is…how and why does it impact cellular function and in turn, our overall health?

Long story short: cellular division keeps the body young.  It’s the process by which cells replicate their genetic information (or DNA), split that DNA into two parts, then divide those two DNA partitions into separate “offspring” daughter cells.  In turn, these daughter cells repeat the process, replicating and splitting DNA to be shared with their daughter cells, so on and so forth.

In 1961, Hayflick & Moorhead set out to test an interesting question: will cells just continually divide and create new cells, seemingly infinitely?

In one of their experiments, they found that if human fibroblast cells were allowed to grow endlessly in a petri dish, the process of cell division would progressively slow as the cells “aged.” 

Eventually, the scientists found that this cell division would stop altogether.  Interestingly, this wasn’t the end for these cells…they continued to function by generating energy via mitochondria and synthesizing the proteins necessary to maintain their cellular activity. 

As cell division is typically thought of as a cardinal feature of a “living” cell, this observation became a popular finding.  Because these cells would stop dividing, but continue to function like a living cell, they came to be known as “zombie cells.”  Much like those bloody menaces from your favorite slasher film, they’re considered to be functioning, but “undead.”

Zombie cells, as it turns out, serve quite an interesting purpose in the human body, and are associated with the process called cellular senescence.

...by experimentally inducing senescence, researchers have found that senescent brain cells play a key role in memory impairment

Senescence, Inflammation, and Controlling Zombie Cells: The Role of Senolytics and Antioxidants

While senescence prevents the division of damaged cells, an accumulation of these zombie cells can lead to chronic inflammation, contributing to age-related diseases like frailty, osteoarthritis, cancer, diabetes, and cardiovascular disease. These zombie cells can also impact the brain, impairing memory function and potentially leading to cognitive decline.

Researchers are exploring senolytics, a class of drugs designed to destroy senescent cells (zombie cells), as a potential solution. Natural antioxidants like astaxanthin have shown promise in reversing the impact of zombie cells, offering hope for mitigating the effects of cellular aging. Glutathione (GSH), another compound, has also displayed senolytic properties, emphasizing the importance of antioxidants in our diet.

 

Is senescence good or bad for the body?

We know all that talk of zombies makes this seem pretty dangerous, right?  But truthfully, senescence can be a good thing.  It is essential to halt the division of damaged cells, which can lead to the transfer of mutated DNA (i.e., potentially oncogenic) and faulty cell division. 

However, as we age, the accumulation of senescent cells may pose a problem. 

a microscopic look at bubbles, looks like a galaxy with a dark backdrop and orange spheres

Remember that these zombie cells release inflammatory molecules, signaling nearby cells to undergo senescence and fend off the body’s own waste control mechanisms that are trying to destroy the zombie cell altogether. 

The problem is, when enough of these cells begin to accumulate, this can be a source of long term, low-grade inflammation in the body.  This type of inflammation has been linked to many age-related chronic diseases.  So, while some senescent cells are manageable, having too many can become a problem. 

Think of it like caring for weeds on your front lawn.  You may have bright, healthy grass, but if you notice one or two dandelions, it’s no big deal: your lawn can still flourish with them hanging around.  But as the dandelions begin to spread and take up more space, you will probably notice the quality of your grass declining.  Those weeds are stealing nutrients that could be better served going to your grass.

To tackle this problem, you go out and buy pesticides to manage the weeds.  Once they’re removed, there’s fresh space for new, healthy grass to grow, which will help your lawn return to its original, healthy state.  Balanced. 

So back to the lesson: the blades of green grass are our healthy cells, and dandelions senescent ones.  As these senescent cells accumulate, they take away from the ability of healthy cells to thrive and use up the available nutrients.  In the end, the more senescent cells, the less likely healthy cells can continue to divide and flourish in the surrounding environment. 

Considering these senescent cells have been linked to various chronic inflammatory disease states, scientists are starting to think about applying this same logic as they investigate ways to remove senescent cells to improve the human healthspan. 

How are zombie cells linked to health and bodily function?

So we know how it works, but what does that actually mean for our day to day as humans?

One aspect by which senescence can affect health and bodily function is through immunosenescence.  Because immune cells are responsible for clearing out senescent cells in the body, when immune cells themselves become “zombified,” the immune system’s ability to clear our senescent cells weakens.  This, in turn, can be dangerous as it gives senescent cells the green light to accumulate in the body.

Age-related complications like frailty, osteoarthritis, cancer, diabetes, and cardiovascular disease have all been related to inflammaging—the gradual increase in systemic inflammation as we age.  Given the role of senescence in triggering inflammation, researchers believe that zombie cells can actually trigger the inflammatory mediators responsible for driving many of these ailments.

It’s important to note that zombie cells can even have an impact on the brain.  In fact, by experimentally inducing senescence, researchers have found that senescent brain cells, including glial cells (i.e., astrocytes), play a key role in memory impairment.  To combat it, they’ve found targeting oxidative stress by supplementing with antioxidants can reverse the impact of senescent cells and restore memory function. 

These findings not only highlight the importance of senescence as it relates to brain function and age-related cognitive decline (i.e., development of dementia), but it also introduces the idea that it may be possible to control the impact of senescent cells by using antioxidant compounds. 

Embracing Antioxidants for a Healthier Future in the Face of Zombie Cells

In the battle against zombie cells, antioxidants emerge as our allies. By understanding the science behind cellular senescence and embracing antioxidant-rich foods and supplements, we can potentially safeguard ourselves against age-related diseases and improve our overall healthspan.

Remember, just as antioxidants combat cellular stress, our knowledge empowers us to combat the challenges of aging. So, arm yourself with antioxidants, and let's face the future with vitality and resilience!

Do you want to take steps to combat zombie cells? Shop CELLF.

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