Researchers have reversed aging cells in mice and are now injecting human patients with an innovative therapy. The groundbreaking shot may extend human lifespans while improving treatments for injuries and age-related conditions; perhaps even making whole body rejuvenation possible!
Harvard Medical School researchers have developed ways to manipulate epigenetic tags that mark DNA and power the biological clock, in order to change blood stem cell behavior from older to more youthful ones. They were successful at turning back time on blood stem cell aging.
Stem Cells
Stem cells serve as master cellular repairmen that generate and repair various cell types that compose our tissues and organs, as well as acting as backups in replenishing damaged or worn-out cells throughout our bodies. Their loss with age contributes to frailty as we age as well as being linked with several age-related diseases.
Stem cells can be found throughout the body, with bone marrow being the epicenter for stem cell production and distribution of red and white blood cells, platelets and clotting factors. But research demonstrates that most stem cells come from other sources within our bodies as well: mesenchymal progenitor cells (MSC) may be extracted from fat tissue, muscle or dental pulp for injection directly into bloodstream to trigger an anti-aging response and stimulate regeneration throughout.
After being injected, MSCs release a cocktail of growth factors and signaling molecules, stimulating dormant stem cells in your own body to become active again, as well as encouraging blood vessel formation, tissue regeneration, and creating a stronger immune system.
By taking part in signaling activities, stem cells injected into the body may help reduce chronic low-grade inflammation and other biomarkers associated with aging. They could also prevent build-up of senescent cells while restoring mitochondrial function.
Furthermore, they can boost cellular metabolism, minimize harmful inflammatory pathways and lessen activation of cGAS-STING immune system responses – all with the intention of helping reprogrammed stem cells better withstand tumorigenesis or other cancerous cell transformations.
Dr. Ghaffari’s research centers around Hematopoietic Stem Cells (HSCs), rare long-lived cells found in bone marrow that produce all blood and immune system cells. He and his colleagues have discovered that aged HSCs become hyper-acidic, depleted, damaged, and abnormally activated with age causing them to lose the ability to regenerate as well as give rise to leukemic cells.
Humans lack the regenerative capacity of lower animals such as Planaria that can regrow an entire organism within days or Hydra that can replace lost limbs within 10 days, but recent studies have demonstrated that small numbers of human stem cells can be reprogrammed into fully functioning hematopoietic stem cells even among extremely elderly individuals.
Antioxidants
Oxidation is a natural part of human metabolism, but it can be harmful. Oxidation releases unstable molecules called free radicals which damage DNA, cell membranes and other structures in the body. Antioxidants can help neutralize these free radicals; such compounds can be found in food such as fruits and vegetables.
Studies have demonstrated the protective power of antioxidants in lowering risk factors for various conditions and diseases, including heart disease, cancer and diabetes. They can also slow cellular and tissue aging by decreasing oxidative stress.
Antioxidants can be found in various food sources, including fruits, vegetables, beans and whole grains. Antioxidant supplements also often include multiple antioxidants for maximum effectiveness; selecting one with multiple forms may increase its overall impact.
Black beans, green tea and tomatoes are great sources of antioxidants; specifically tomatoes contain the powerful lycopene antioxidant which has been linked to decreased risk of heart disease and prostate cancer. Red wine and dark chocolate also contain high concentrations of antioxidants.
Vitamin C can also help reverse aging and is an essential nutrient everyone should aim to include in their daily diet. Other antioxidants that may also aid in this effort include coenzyme Q10, acetyl-cysteine and beta-carotene; many foods are high in antioxidants; the colors of food may give away its content: orange and yellow foods are abundant with beta-carotene while leafy greens, fruits and nuts contain high amounts of vitamin C.
Eating a varied and balanced diet is the best way to obtain essential antioxidants, with some stored within your body while others only available through food sources. Furthermore, certain antioxidants become more readily absorbed when they’re combined with another nutrient; for instance, pairing tomato-based sauce with fat helps your body absorb more lycopene.
Multiple, large-scale studies have concluded that antioxidants do not increase lifespan and, in fact, may even be detrimental. But these studies may have been flawed or other mechanisms may play a part in increasing longevity such as epigenetic regulation and protein accumulation.
Vitamin D
Vitamin D has long been recognized for its benefits on bone health and immunity, but new research suggests it could also play a vital role in slowing cellular aging. One of the largest randomized clinical studies ever conducted showed that supplementing with Vitamin D helped maintain protective caps at the ends of chromosomes known as telomeres that naturally shorten with age and are linked to disease.
Substantial exposure to sunlight causes Vitamin D prohormones to convert to their biologically active form: 1a,25-dihydroxyvitamin D3 (1,25(OH)2D3, or calcitriol). 1,25(OH)2D3 exerts multiple effects; most of which are exerted through binding to its vitamin D receptor (VDR), a nuclear receptor superfamily ligand-dependent transcription factor ligand that binds directly with cells for signal transduction purposes. 1,25(OH)2D3 also regulates cell growth and differentiation and supports antiproliferative and antiinflammatory pathways.
Researchers have noted that low Vitamin D levels increase the risk of multiple diseases, including heart disease. Researchers speculate that this phenomenon is attributable to Vitamin D’s regulation of the renin-angiotensin-aldosterone system, which has been implicated in vascular dysfunction and inflammation as well as increased cardiovascular events risk.
Vitamin D plays an essential role in combatting cancer risk and tumor formation. Studies have demonstrated that supplementing with Vitamin D reduces both incidence and severity of certain cancers such as colorectal and breast, while improving quality-of-life for those being treated for these illnesses.
Research presented in this article is still at an early stage, and further study must be completed to ascertain long-term consequences of this approach. However, results of recent studies and these early stages suggest that maintaining serum Vitamin D levels between 40-60 ng/mL via daily supplementation could significantly slow biological aging by prolonging telomere shortening and slowing biological aging. Balanced nutrition, regular movement, stress reduction techniques and quality sleep all play important roles in increasing telomere length and overall wellness.
Metformin
Metformin has long been recognized for treating type 2 diabetes (T2DM), but recent research has demonstrated its anti-aging benefits beyond its glycemic effects. These actions include mitochondrial energy modulation, activation of the AMPK-mTOR signaling pathway, induction of autophagy, mitigation of inflammation, epigenetic changes that support genomic stability and homeostasis and epigenetic changes that slow epigenetic aging and cell senescence which in turn defer disease progression. Together, these actions help slow epigenetic aging while delaying disease onset significantly – thus delaying its onset significantly.
Metformin may help slow cellular senescence and aging by decreasing reactive oxygen species (ROS) produced through metabolic processes, which contribute to reactive oxygen species (ROS). Metformin has been found to inhibit ROS production, thus inhibiting age-related pathways and protecting endothelium function through reduced oxidative stress levels; hence making it an attractive candidate to treat age-related conditions like heart failure and chronic kidney disease.
Metformin has been shown to significantly extend both healthspan and lifespan in both C. elegans and mice in preclinical studies. This effect likely stems from its mitochondrial-supportive actions mediated by reduced liver kinase B1 (LKB1) activity; specifically by increasing expressions of SKN-1 and Nrf2, thus stimulating activity of AMPK which inhibits reverse electron flow through complex I in the mitochondrial electron transport chain, mitigating oxidative stress while improving resilience against cell damage.
Metformin has been shown to reduce hepatocellular carcinogenesis and angiogenesis by inhibiting cell overgrowth, increasing cell adhesion, and diminishing chemotherapy response. Furthermore, metformin can be used to stop solid tumor growth by inducing CD8+ tumor-infiltrating lymphocyte accumulation.
However, metformin remains a challenge as an anti-aging therapy; several issues must still be overcome in its development as such. These include gaining an in-depth knowledge of its molecular mechanisms and optimal dosing strategies as well as testing safety and efficacy in non-diabetics populations. Integrating multi-omics data alongside principles of precision medicine could facilitate metformin’s potential as an anti-ageing agent.