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THE OMICS OF MEDICINE

The advent of high-throughput technologies in the field of genomic sciences and systems biology has brought about a revolution in primary prevention.  From the early era of sequencing when short genomic reads were being characterized to the current era where the idea of personalized genomes has become a possibility, science has progressed tremendously. Omics refers to the review of specific types of medical information on a complete and comprehensive spectrum that ends in the suffix – omics. Omics-based medicine and systems biology will realize a new approach to practicing medicine – personalized, predictive, and precise medicine.

.  .  .

Human Genome Project- The beginning of a new era of personalized medicine

The Human Genome Project (HGP) was the first step toward personalized medicine when it completed the sequencing of the first complete human genome. Whole-genome sequencing refers to the entire genome (your complete set of DNA, or deoxyribonucleic acid) being sequenced. The HGP was led by an international team of researchers leading a scientific research effort to determine what parts make up human DNA, and also of mapping and identifying all of the human genes of the human genome. Despite recent technologies driving down the cost, it is still been expensive making it unfeasible for most to conduct individual genome sequencing. Recent advancements in technology resulted in a marked reduction in the cost thereby enabling personalized Whole Genome Sequencing (WGS) which allows for the characterization of disease on a molecular level.

An even more promising alternative to the WGS is the whole-exome sequencing (WES) which permits the study of only the exonic or functional regions of the genome. This means instead of sequencing your complete set of DNA, you are only sequencing the protein-coding regions of genes in a genome. This technology is a fraction of the cost of WGS. WGS is a promising and cost-effective step towards the development of therapy tailored to individual needs.

Going beyond the genome: Exploring the other omics

Source: https://err.ersjournals.com/

Transcriptomics

Transcriptomics is the study of the transcriptome, or the entire RNA transcripts including the mRNA, non-coding RNA, and small RNAs, produced by the genome. The goal of transcriptomics is to detect which genes are expressed in the given sample. By collecting and comparing transcriptomes of different types of cells, clinicians can gain a deeper understanding of what makes a specific cell type, how that type of cell conventionally functions, and how changes in the regular level of gene activity contribute to disease.

Proteomics

Proteomics is the study of proteomes. A proteome is the entire set of proteins that are produced or modified by an organism. Proteomics provides important insights into our understanding of cell signaling, a key aspect of biological life. Cell signaling allows cells to perceive and respond to the extracellular environment allowing development, growth, immunity, and more!

The growth of proteomics has helped in providing insights on the data missing from transcriptome analysis. Proteome research is currently being used in the characterization of diseases like cancers, studying the effects of post-translational modification (chemical modifications that play a key role in functional proteomic), and biomarker discovery. Proteomic technology is extremely complex but new proteomics tools have enabled researchers to dive deeply into signaling networks, allowing them to find out information on interactions among key molecules.

Metabolomics

Metabolomics is the study of small molecules, commonly known as metabolites, within cells, biofluids, tissues, or organisms, produced as a consequence of the metabolic processes. These small molecules constitute the metabolome and their study provides insight into various biological pathways involved in common disorders. Further advancements in metabolomics will aid in disease risk assessment, diagnosis, and therapeutics. Profiling of individual metabolites can be very beneficial for biomarker discovery which in turn is useful for the early diagnosis of the diseases and for personalized therapeutic strategies.

Epigenomics

Epigenomics is the study of the complete set of epigenetic modifications on the genetic material of a cell, known as the epigenome. The epigenome consists of a multitude of chemical compounds that can tell the genome what to do. The genome is passed from parents to their children and from cells, when they divide, to their next generation. Much of the epigenome is reset when parents pass their genomes to their children; however, sometimes, can be inherited from generation to generation. Interestingly, lifestyle and environmental factors (such as lifestyle, diet, and disease) can expose a person to pressures that prompt chemical responses which result in changes to the epigenome throughout a person’s life. Epigenomics is a fascinating field as it is vital to better understand the human body and to improve human health. Emerging epigenomic map technology will facilitate better prevention, diagnosis, and treatment of disease.

Microbiomics

Microbiomics is the study of microbial cells – including bacteria, fungi, protozoa, and viruses that collectively constitute the microbiome. The human microbiome is the aggregate of all microbiota in a human body. A large body of research has demonstrated a strong association between the gut microbiome and disease. Microbes ( a microorganism) have been associated with neurological disorders ranging from degenerative diseases (such as Alzheimer’s, Parkinson’s, ALS, and dementia) to mental health disorders (such as depression and anxiety) that are becoming, unfortunately, commonly diagnosed today. Microbiomics is a key component in personalized medicine as novel correlations between the human microbiome and health and disease are routinely emerging, furthering our quest for personalized medicine.

Pharmacogenomics

Pharmacogenomics assesses how individual genes affect drug interactions. It has been found that the same drug may produce variable effects on different individuals based on the differences in their genomic background. Genetic information could thereby assist in assigning drug doses to individuals based on their needs. It could also be very helpful in reducing the adverse effects associated with drugs.

Omics at a glance

Advantages

Omics testing is a very promising technology with a huge number of potential benefits. Capable of revolutionizing the healthcare and drastically improving health and lifestyle, this technology anticipates the development of personalized medicine.

In addition to its impact on patient care, it will also allow a deeper understanding of the disease pathogenesis, early diagnosis and intervention. Biomarker discovery is another potential advantage of Omics testing that will revolutionize diagnosis allowing us to delve deeper into disease risk factors and causes. Omics testing as a whole would be able to answer the problems arising from the complexity of the disease phenotype. Biomarker discovery is another potential advantage of omics testing providing useful signatures of disease. Pharmacogenomics will be relevant in clinical decisions about prescribing the best medication for you.

Future of Healthcare

Personalized Medicine has become the most modernized trend disrupting the healthcare industry in the most recent years. There has been a paradigm shift from ‘one-size -fits all” towards a precise and personalized approach.

The quest for personalized medicine has resulted in various advancements to achieve targeted care paths with a personalized multi-omics approach. With new technology, the interrelationships between the human genome, the microbiome, the metabolome, the proteome, the epigenome, the transcriptome, and other factors have shown to provide a better picture of our health journey, are just starting to be revealed. Researchers and clinicians have access to a new and thorough view of the molecular manifestation of diseases and with emerging technologies, can translate that into helpful advice that can be used in the prevention of diseases together with improved diagnostics and cure. In the future, Omics-data will utilize the patient’s individuality including their genetic make-up, lifestyle, and exposome which is defined as the “ totality of exposure individuals experience over their lives and how those exposures affect health. “ in decision making when it comes to disease management.

More about The Institute for Human Optimization

The Institute for Human Optimization we believe that Omics-based medicine and systems biology will realize a new approach to practicing medicine – personalize, predicative, and precise medicine. We are committed to helping you create a personalized plan for living your longest, healthiest life possible. My team and I leverage the most cutting-edge advances in genetic testing, nutritional analysis, and functional medicine to get to the root biological imbalances that cause aging.

The Institute for Human Optimization was created with the intention of pursuing a highly personalized approach to longevity medicine to help enhance healthspan. Where lifespan is the actual number of years we’re alive, healthspan is how many of those years are spent in health and wellness.

We believe that a long healthspan – not just a long lifespan – is the most important thing you can cultivate. A long healthspan means you don’t miss out on life as you get older. It means remaining independent and having the vitality to travel and see the world.  A long healthspan means that you can be there – in full body and mind – for the people who need you the most and that every day will feel like a gift.

We know that each person is truly unique. From DNA to iris, we all possess a blueprint that is genetically inherited and environmentally influenced. By gaining a deeper appreciation for the person on a molecular level and addressing the root causes driving disease, we can help promote optimized health through our unique scientific, N of 1, approach to individualized care.

The Institute for Human Optimization provides the most comprehensive, data-driven, personalized approach to wellness. It is:

·   Predictive – We use genomics and advanced biomarker testing to risk stratification and empowerment.

·   Personalized – We use data-driven health information to curate actionable change for disease mitigation and prevention.

·   Preventive – We utilize highly individualized programs tailored to your unique genomic blueprint.

·   Participatory – We empower engagement in personal choices, which allows for improved outcomes and enhanced results.

I am so excited about the possibility to support you on this cutting-edge journey to extend your lifespan AND your healthspan. Click here to schedule Your Longevity Equation Epigenetic Consult! Can’t wait to meet you!

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ALTERED INTERCELLULAR COMMUNICATION – Where Inflammation Meets Aging

As we age, cells show an increase in self-preserving signals that result in damage elsewhere in the body. Altered intercellular communication contributes to symptoms and diseases that are associated with declining health.

.  .  .

Today, we conclude our nine-part series on the Hallmarks of Aging. If you have followed along, you will find that each hallmark either directly or indirectly affects the other. (Start here if you’d like to start with the first hallmark.)

The first four hallmarks are considered primary since they are believed to be actual causes of aging and have a definitive negative effect on DNA. They are what first initiate cellular damage, which then leads to accumulation and progressive loss of function. They are:

·  Genomic instability

·  Telomere attrition

·  Epigenetic alterations

·  Loss of proteostasis

The next three are called antagonistic, as they ultimately respond to the damage caused by the primary hallmarks. However, they are initially designed to have protective factors. It is only when bodily conditions become chronic and/or aggravated that they contribute to cellular damage. They are:

·  Deregulated nutrient-sensing

·  Mitochondrial dysfunction

·  Cellular senescence

The last two hallmarks are thought to be integrative because they “directly affect tissue homeostasis and function.” These come into play once the accumulated damage caused by the primary and antagonistic hallmarks can no longer be stabilized. Once this happens, the functional decline is inevitable. They are:

·  Stem cell exhaustion

·  Altered intercellular communication

This week, we will cover the final hallmark: altered intercellular communication. The primary and antagonistic hallmarks each contribute to the variety of breakdowns in communication within and around our cells, thus the reason for altered intercellular communication is identified as one of the two integrative hallmarks.

Communication is everything

Our cells process millions of signals every day. Scientists have spent entire careers discovering how different signals and intercellular pathways work. It’s that important. When communication gets disrupted, it can allow disease to set in, such as cancer cells growing out of control. In fact, most diseases involve at least one breakdown in cell communication.

How a cell gives and receives messages with its environment and with itself is critical to its survival. It processes information from the outside, such as changes in temperature, variation in light levels, and availability of nutrients. It also communicates with other cells via chemical and mechanical signals, which cause alterations in their function.

Protein receptors embedded in the cell membrane connect membrane signals that affect the inner chemistry of the cell. This allows the direct passage of molecules between the internal and external compartments of the cell. All of this translates into how our cells adapt and change based on our environment and what our bodies need. This includes functions from gene expression and glucose regulation to our overall development.

Inflammation and aging don’t mix

As we age, the signals that send chemical messages across our bodies tend to become more inflammatory. This inhibits our immune system and can cause muscle wasting, bone loss, and other detrimental effects. This gradual increase of systemic inflammation in the body as we age is called inflammaging.

This consistent growth in inflammation leads to cells increasingly activating a chemical in their nuclei that regulate inflammation. This protein complex, called NF-kB, is involved in responses to heavy metals, free radicals, bacterial and viral antigens, and even stress. When it is over-produced, it leads to damaging consequences and becomes a significant risk factor as we age.

Cellular senescence, one of the antagonistic hallmarks of aging, is one of the main factors contributing to inflammaging. Senescent cells are known to negatively affect neighboring cells because they release pro-inflammatory cytokines, growth factors, and proteases that affect the function of nearby cells and incite local inflammation. This is a concept known as the bystander effect.

Inflammaging also hinders our immune system’s ability to effectively clear pathogens and dysfunctional cells, such as those that turn into cancer. This is known as immunosenescence. 

And as inflammatory reactions accumulate, neurohormonal signaling also becomes deregulated as we age. When NF-kB is activated in the hypothalamus, it has been shown to inhibit the production of gonadotropin-releasing hormone (GnRH). The reduction of this hormone can lead to skin degradation, muscle weakness, and bone fragility. It can also affect food intake and metabolism.

How to improve intercellular communication

Dietary/caloric restriction, mentioned in many of our blogs in this series, is one of the most studied ways to potentially restore, or at least improve communication between our cells as we age. As recently as February 2020, scientists in the US and China collaborated to study the cellular effects of a calorie-restricted diet.

“The primary discovery in the current study is that the increase in the inflammatory response during aging could be systematically repressed by caloric restriction,” says co-corresponding author Jing Qu, also a professor at the Chinese Academy of Sciences.

Including more foods that are known to reduce inflammation, such as green leafy vegetables, fatty fish, berries, and olive oil can help to reduce the effects that inflammaging has on our bodies as we age. “A healthy diet is beneficial not only for reducing the risk of chronic diseases, but also for improving mood and overall quality of life,” Dr. Frank Hu, professor of nutrition and epidemiology in the Department of Nutrition at the Harvard School of Public Health, says.

Additionally, since the gut microbiome is an integral part of our immune system, it appears possible to extend healthy aging and lifespan by focusing on the health of our intestinal bacterial ecosystem.

What else can I do?

My best-selling book, The Longevity Equation, provides a step-by-step blueprint to hack your genes, optimize your health and master the art of existence. In my book, I take an in-depth look at aging, explore what it means to extend your healthspan, and outline the pathways and factors that lead to a lifelong solution to the burdens of aging.

In collaboration with TruDiagnostic™, I have developed The Longevity Equation Epigenetic Consult. We are offering a revolutionary new way to access your health using an epigenetic test called TruAge™. This test will help tell you what your body is actually doing right now and what that means. 

TruAge™ works by using mathematical models and a powerful algorithm to measure DNA methylation-based biomarkers. Methylation is what modifies the function of the genes in the body by adding what’s called a methyl group to DNA, which is what signals genes to turn on or off. DNA methylation is the best indicator of age-related changes and is the best-studied biomarker of age. This comprehensive testing method determines your epigenetic, or biological age, and can detect the acceleration of aging before the signs of aging even begin to appear.

The Longevity Equation Epigenetic Consult is intended to give you a snapshot of your biological age, as well as the lifestyle and environmental shifts you can make right away to start adding vitality and wellness into your life. Click here to schedule your consult!

More about The Institute for Human Optimization

The Institute for Human Optimization is committed to helping you create a personalized plan for living your longest, healthiest life possible. My team and I leverage the most cutting-edge advances in genetic testing, nutritional analysis, and functional medicine to get to the root biological imbalances that cause aging.

The Institute for Human Optimization was created with the intention of pursuing a highly personalized approach to longevity medicine to help enhance healthspan. Where lifespan is the actual number of years we’re alive, healthspan is how many of those years are spent in health and wellness.

We believe that a long healthspan – not just a long lifespan – is the most important thing you can cultivate. A long healthspan means you don’t miss out on life as you get older. It means remaining independent and having the vitality to travel and see the world.  A long healthspan means that you can be there – in full body and mind – for the people who need you the most and that every day will feel like a gift.

We know that each person is truly unique. From DNA to iris, we all possess a blueprint that is genetically inherited and environmentally influenced. By gaining a deeper appreciation for the person on a molecular level and addressing the root causes driving disease, we can help promote optimized health through our unique scientific, N of 1, approach to individualized care.

The Institute for Human Optimization provides the most comprehensive, data-driven, personalized approach to wellness. It is:

·   Predictive – We use genomics and advanced biomarker testing to risk stratification and empowerment.

·   Personalized – We use data-driven health information to curate actionable change for disease mitigation and prevention.

·   Preventive – We utilize highly individualized programs tailored to your unique genomic blueprint.

·   Participatory – We empower engagement in personal choices, which allows for improved outcomes and enhanced results.I am so excited about the possibility to support you on this cutting-edge journey to extend your lifespan AND your healthspan. Click here to schedule Your Longevity Equation Epigenetic Consult! Can’t wait to meet you!
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STEM CELL EXHAUSTION – The Ultimate Culprit of Aging

Stem cells have exceptional abilities to self-renew and recreate functional tissues. When this regenerative potential begins to decline in our bodies, many researchers believe it is the defining moment when we begin to see age-related conditions manifest.

. . .

We have written about seven of the nine Hallmarks of Aging. The first four are considered primary since they are believed to be actual causes of aging and have a definitive negative effect on DNA. They are what first initiate cellular damage, which then leads to accumulation and progressive loss of function. They are:

·  Genomic instability

·  Telomere attrition

·  Epigenetic alterations

·  Loss of proteostasis

The next three are called antagonistic, as they ultimately respond to the damage caused by the primary hallmarks. However, they are initially designed to have protective factors. It is only when bodily conditions become chronic and/or aggravated that they contribute to cellular damage. They are:

·  Deregulated nutrient-sensing

·  Mitochondrial dysfunction

·  Cellular senescence

The last two hallmarks are thought to be integrative because they “directly affect tissue homeostasis and function.” These come into play once the accumulated damage caused by the primary and antagonistic hallmarks can no longer be stabilized. Once this happens, the functional decline is inevitable. They are:

·  Stem cell exhaustion

·  Altered cellular communication (more on this next week!)

This week, we will cover stem cell exhaustion. In one way or another, each primary and antagonistic hallmark of aging culminates in the diminished self-renewing capacity of stem cells, thus the reason it is identified as one of the two integrative hallmarks.

The marvel of stem cells

Your body comprises more than 200 cell types. Your liver cells are replaced every 300-500 days; your skin cells, every couple weeks; and your taste buds every 10 days or so. Your body continually manufactures new blood cells to replace old ones, and about 1 percent of the body’s blood cells must be replaced every day. White blood cells have the shortest life span, sometimes surviving just a few hours to a few days, while red blood cells can last up to 120 days or so.

Stem cells are the foundation for every organ and tissue in your body. While there are many types of stem cells, three are best known: embryonic, adult, and induced pluripotent.

Embryonic stem cells begin forming within five days after fertilization. They exist only in the earliest stages of development and are considered pluripotent, or undifferentiated, as they have the ability to give rise to every cell type in the fully formed body.

Adult stem cells, also known as somatic or tissue-specific stem cells, are multipotent, meaning they differentiate to yield the specialized cell types of the tissue or organ in which they reside, and may have defining morphological features and patterns of gene expression reflective of that tissue. These adult stem cells are responsible for repairing or replacing damaged tissue as we age or experience injury.

For therapeutic and research purposes, scientists are also able to generate induced pluripotent stem cells by re-introducing the signals that normally tell stem cells to stay as stem cells in the early embryo. These switch off any genes that tell the cell to be specialized, and switch on genes that tell the cell to be a stem cell.

Cells go through several stages while differentiating and become more specialized with each step. Signals secreted by other cells, physical contact with surrounding cells, and other molecules present in the body all contribute to the differentiation process.

Figure 1: An illustration showing different types of stem cell in the body. Image credit: Genome Research Limited

The effects of exhaustion

As we age, some of our adult stem cells repair and regenerate cells that have experienced wear and tear, injury or disease. They are not involved in normal tissue function, but remain quiescent – a state in which they do not divide, yet retain the ability to proliferate highly specialized cells specific to the organ and tissues where they reside. They are activated when the need arises. The unique ability of adult stem cells to maintain quiescence is crucial for life-long tissue homeostasis and regenerative capacity. 

The activation process of quiescent stem cells is very complex and requires precise reorganization to transition into a proliferative state, and it, unfortunately, declines over time. The consequences of stem cell exhaustion manifest in different ways, depending on the type of stem cell affected.

·  Hematopoietic (blood-forming) stem cell (HSC) exhaustion results in anemia and myelodysplastic syndromes, a group of blood disorders where stem cells do not mature into healthy blood cells.

·  Mesenchymal stem cells (MSCs) are found in bone marrow. They are important for making and repairing skeletal tissues, such as cartilage, bone and the fat found in bone marrow. When they become exhausted, osteoporosis can set in, as well as decreased fracture repair.

·  Myosatellite cells, or muscle stem cell exhaustion shows up as hindered repair of muscle fibers.

·  Intestinal epithelial stem cells (IESCs) are one of the most rapidly renewing cell populations in the body. When these become exhausted, one might accurately guess that intestinal function will be negatively impacted.

Help is on the horizon

It is estimated that the number of adults older than 65 will reach upwards of 88.5 million by 2050.  With this staggering number in the forefront, it is more important than ever to find therapeutic interventions to improve stem cell function.

As mentioned above, induced pluripotent stem cells are being avidly researched in order to more thoroughly understand the potential they could have on healing. While it is an absolutely promising and likely option to look forward to, it has not been perfected yet.

This brings us to the point, as it has in each blog of this hallmarks of aging series, where we look at what we can do in the meantime. The most promising and recent research illustrates the connection between a fasting-mimicking diet and the body’s ability to regenerate stem cells.

USC researchers found that a fasting-mimicking diet reduced intestinal inflammation and increased intestinal stem cells, in part by promoting the expansion of beneficial gut microbiota. The research team observed that the fasting component allowed the intestines to heal, but that the specific, calorie-restricted diet allowed the microbes in the gut to flourish, which was crucial to the stem cells rebuilding and regenerating.

Valter Longo, the director of the USC Longevity Institute at the USC Leonard Davis School of Gerontology and professor of biological sciences at the USC Dornsife College of Letters, Arts and Sciences says, “This study for the first time combines two worlds of research. . .The first is about what you should eat every day, and many studies point to a diet rich in vegetables, nuts and olive oil. The second is fasting and its effects on inflammation, regeneration and aging.”

What else can I do?

My bestselling book, The Longevity Equation provides a step-by-step blueprint to hack your genes, optimize your health and master the art of existence. In my book, I take an in-depth look at aging, explore what it means to extend your healthspan, and outline the pathways and factors that lead to a lifelong solution to the burdens of aging.

In collaboration with TruDiagnostic™, I have developed The Longevity Equation Epigenetic Consult. We are offering a revolutionary new way to access your health using an epigenetic test called TruAge™. This test will help tell you what your body is actually doing right now and what that means. 

TruAge™ works by using mathematical models and a powerful algorithm to measure DNA methylation-based biomarkers. Methylation is what modifies the function of the genes in the body by adding what’s called a methyl group to DNA, which is what signals genes to turn on or off. DNA methylation is the best indicator of age-related changes and is the best-studied biomarker of age. This comprehensive testing method determines your epigenetic, or biological age, and can detect the acceleration of aging before the signs of aging even begin to appear.

The Longevity Equation Epigenetic Consult is intended to give you a snapshot of your biological age, as well as the lifestyle and environmental shifts you can make right away to start adding vitality and wellness into your life. Click here to schedule your consult!

More about The Institute for Human Optimization

The Institute for Human Optimization is committed to helping you create a personalized plan for living your longest, healthiest life possible. My team and I leverage the most cutting-edge advances in genetic testing, nutritional analysis, and functional medicine to get to the root biological imbalances that cause aging.

The Institute for Human Optimization was created with the intention of pursuing a highly personalized approach to longevity medicine to help enhance healthspan. Where lifespan is the actual number of years we’re alive, healthspan is how many of those years are spent in health and wellness.

We believe that a long healthspan – not just a long lifespan – is the most important thing you can cultivate. A long healthspan means you don’t miss out on life as you get older. It means remaining independent and having the vitality to travel and see the world.  A long healthspan means that you can be there – in full body and mind – for the people who need you the most and that every day will feel like a gift.

We know that each person is truly unique. From DNA to iris, we all possess a blueprint that is genetically inherited and environmentally influenced. By gaining a deeper appreciation for the person on a molecular level and addressing the root causes driving disease, we can help promote optimized health through our unique scientific, N of 1, approach to individualized care.

The Institute for Human Optimization provides the most comprehensive, data-driven, personalized approach to wellness. It is:

·   Predictive – We use genomics and advanced biomarker testing to risk stratification and empowerment.

·   Personalized – We use data-driven health information to curate actionable change for disease mitigation and prevention.

·   Preventive – We utilize highly individualized programs tailored to your unique genomic blueprint.

·   Participatory – We empower engagement in personal choices, which allows for improved outcomes and enhanced results.I am so excited about the possibility to support you on this cutting-edge journey to extend your lifespan AND your healthspan. Click here to schedule Your Longevity Equation Epigenetic Consult! Can’t wait to meet you!

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CELLULAR SENESCENCE – When Cells Undermine Their Purpose

Our bodies have a built-in process that is believed to be a protective mechanism called cellular senescence. As we age, this process slows down and can result in disease.

. . .

The biological definition of aging is the many processes of cellular damage accumulation in the body. These are known in the scientific literature as the Nine Hallmarks of Aging. We’ve covered the first four, or primary, hallmarks: genomic instability, telomere attrition, epigenetic alterations, and loss of proteostasis, as well as the first two of the antagonistic: deregulated nutrient-sensing, and mitochondrial dysfunction.

The role of the antagonistic hallmarks is to respond to and block the damage caused by the primary hallmarks. Yet, when bodily conditions become chronic and/or aggravated, they end up contributing to cellular damage and can accelerate aging. The seventh hallmark, and third of the antagonistic, is cellular senescence. Senescence plays roles in normal development, maintains tissue homeostasis, and limits tumor progression. If you’ve read any of my blogs in the past, you know this is one of my favorite topics.

The miracle that is us

It varies depending on the cell, but the division cycle of a typical human cell averages 24 hours, which is mind-blowing considering the complexity of what takes place.

Figure 1: The cell cycle Courtesy: National Human Genome Research Institute

Our cell cycle has four stages:

·         G1 (gap 1) stage: where the cell prepares to divide. This is the longest phase, where the cell is metabolically active and continues to grow, but does not replicate its DNA.

·         S (synthesis) stage: where the cell copies its entire DNA.

·         G2 (gap 2) stage: where cell growth continues and it organizes and condenses the genetic material and prepares to divide.

·         M (mitosis) stage: where the cell separates the two copies of chromosomes into two daughter cells. This is the most dramatic stage, ending in the cell division in a process called cytokinesis.

 A fine line between helping and hurting

In my best-selling book, The Longevity Equation, I point out that, “When your cells have had more than enough DNA damage, stress, and telomere shortening, they enter a state of growth arrest known as cellular senescence. This function is put in place to prevent damaged cells from turning into cancerous cells. However, in the process, it also stops allowing worn-out tissue to be replenished and rebuilt. Senescent cells often secrete inflammatory molecules that further damage the cellular environment, leading to chronic inflammatory conditions, including heart disease and osteoarthritis.”

Cellular senescence inevitably halts the cell cycle during the G2 stage, as a result of excessive intracellular or extracellular stress or damage, such as oxidative stress, DNA damage, and telomere erosion, or when they overexpress certain oncogenes (have the potential to transform into a tumor cell). Once this process starts, it is irreversible.

Similar to the other antagonistic hallmarks of aging, this process is meant to prevent the proliferation of damaged cells and helps to suppress malignant cell formation. However, as time goes by, our bodies begin to accumulate these senescent cells, which leads to the deterioration of the tissue repair mechanism that usually accompanies senescence.

Crossing the threshold

When a cell enters senescence and it stops producing copies of itself, it excretes hundreds of proteins, which in moderation in healthy tissue, signal the immune system to initiate cellular housekeeping, called autophagy, and start the repair process.

However, when disease and aging cause extensive damage in the tissues, senescent cells build up and stay in a state of suspended animation – not alive, but not quite dead. Some scientists call these twilight cells, and others go for a more Hollywood description of zombie cells because they can negatively affect surrounding cells if not cleared efficiently by the immune system.

Again, from my book, The Longevity Equation, “Unlike other damaged cells, zombie cells don’t self-destruct or clear out of the way to make room for healthy cells. Instead, they stick around and interfere with the body’s natural rebuilding and replenishing mechanisms. . .”

Senescent cells cross the threshold from being protective to deleterious when their accumulation causes them to excrete an overabundance of molecules like pro-inflammatory cytokines, growth factors, and proteases that affect the function of nearby cells and incite local inflammation.

Can we clean up the excess?

While there is no magic bullet and research is still learning how to extend our lifespan and our healthspan, studies on cellular senescence are very promising and it seems as though therapies are on the horizon.

“That getting rid of senescent cells is enough to effectively rejuvenate an animal—that tells you they’re a really important driver of aging,” says Lorna Harries, a molecular geneticist at the University of Exeter in the UK who studies cell senescence.

What else can I do?

The Longevity Equation provides a step-by-step blueprint to hack your genes, optimize your health and master the art of existence. In my book, I take an in-depth look at aging, explore what it means to extend your healthspan, and outline the pathways and factors that lead to a lifelong solution to the burdens of aging.

In collaboration with TruDiagnostic™, I have developed The Longevity Equation Epigenetic Consult. We are offering a revolutionary new way to access your health using an epigenetic test called TruAge™. This test will help tell you what your body is actually doing right now and what that means. 

TruAge™ works by using mathematical models and a powerful algorithm to measure DNA methylation-based biomarkers. Methylation is what modifies the function of the genes in the body by adding what’s called a methyl group to DNA, which is what signals genes to turn on or off. DNA methylation is the best indicator of age-related changes and is the best-studied biomarker of age. This comprehensive testing method determines your epigenetic, or biological age, and can detect the acceleration of aging before the signs of aging even begin to appear.

The Longevity Equation Epigenetic Consult is intended to give you a snapshot of your biological age, as well as the lifestyle and environmental shifts you can make right away to start adding vitality and wellness into your life. Click here to schedule your consult!

More about The Institute for Human Optimization

The Institute for Human Optimization is committed to helping you create a personalized plan for living your longest, healthiest life possible. My team and I leverage the most cutting-edge advances in genetic testing, nutritional analysis, and functional medicine to get to the root biological imbalances that cause aging.

The Institute for Human Optimization was created with the intention of pursuing a highly personalized approach to longevity medicine to help enhance healthspan. Where lifespan is the actual number of years we’re alive, healthspan is how many of those years are spent in health and wellness.

We believe that a long healthspan – not just a long lifespan – is the most important thing you can cultivate. A long healthspan means you don’t miss out on life as you get older. It means remaining independent and having the vitality to travel and see the world.  A long healthspan means that you can be there – in full body and mind – for the people who need you the most and that every day will feel like a gift.

We know that each person is truly unique. From DNA to iris, we all possess a blueprint that is genetically inherited and environmentally influenced. By gaining a deeper appreciation for the person on a molecular level and addressing the root causes driving disease, we can help promote optimized health through our unique scientific, N of 1, approach to individualized care.

The Institute for Human Optimization provides the most comprehensive, data-driven, personalized approach to wellness. It is:

·   Predictive – We use genomics and advanced biomarker testing to risk stratification and empowerment.

·   Personalized – We use data-driven health information to curate actionable change for disease mitigation and prevention.

·   Preventive – We utilize highly individualized programs tailored to your unique genomic blueprint.

·   Participatory – We empower engagement in personal choices, which allows for improved outcomes and enhanced results.

I am so excited about the possibility to support you on this cutting-edge journey to extend your lifespan AND your healthspan. Click here to schedule Your Longevity Equation Epigenetic Consult! Can’t wait to meet you!

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