Education / Health & Beauty / Science & Technology

Yamanaka Factors For Reversing Aging

by Susan Sun Nunamaker · July 5, 2024

Dear Friends & Neighbors,

Windermere Blue Sunset (credit: Windermere Sun-Susan Sun Nunamaker)

(Please click on red links & note magenta)

Recently I’ve received quite a few questions from our readers about Yamanaka factors in a previous article in Windermere Sun. So please allow me to further embellish, below:

The Yamanaka factors are a set of four transcription factors—Oct4, Sox2, Klf4, and c-Myc—discovered by Dr. Shinya Yamanaka. These factors are crucial in the reprogramming of somatic cells into induced pluripotent stem cells (iPSCs). This groundbreaking discovery has significant implications for cellular rejuvenation and regenerative medicine. Here’s an overview of their relationship to rejuvenation:

Induction of Pluripotency

Reprogramming Cells: The Yamanaka factors can reprogram differentiated somatic cells (such as skin cells) back into a pluripotent state, similar to embryonic stem cells. These iPSCs have the potential to differentiate into any cell type in the body.
Cellular Resetting: By reverting cells to a pluripotent state, the Yamanaka factors effectively reset the cellular age, erasing markers of aging and restoring youthful functionality.

Implications for Rejuvenation

Cell Replacement Therapy: iPSCs can be used to generate healthy, youthful cells to replace damaged or aged cells in tissues and organs, offering potential treatments for age-related diseases.
Tissue Regeneration: The ability to create patient-specific iPSCs enables the development of personalized regenerative therapies, where rejuvenated cells can be used to repair or replace tissues, enhancing overall tissue function and longevity.
Understanding Aging Mechanisms: Studying the reprogramming process provides insights into the mechanisms of cellular aging, potentially identifying targets for anti-aging therapies.

Challenges and Considerations

Tumorigenicity: One of the factors, c-Myc, is an oncogene, meaning it can promote cancer formation. Researchers are working on finding safer ways to reprogram cells without increasing the risk of tumor development.
Epigenetic Memory: Cells reprogrammed into iPSCs can retain some epigenetic marks from their previous state, which may affect their behavior and differentiation potential.
Efficiency and Safety: Enhancing the efficiency and safety of the reprogramming process is critical for its therapeutic application. Current research focuses on optimizing protocols and finding alternative factors or methods for safer reprogramming.

Recent Advances

Partial Reprogramming: Recent studies have explored the concept of partial reprogramming, where cells are exposed to Yamanaka factors for a limited time, enough to rejuvenate them without completely resetting their identity. This approach aims to mitigate risks associated with full reprogramming.
In Vivo Reprogramming: Research is also investigating the potential of in vivo reprogramming, where Yamanaka factors are delivered directly into the body to rejuvenate tissues without extracting and reprogramming cells in vitro.

The discovery of the Yamanaka factors has opened new avenues in the field of regenerative medicine and rejuvenation, providing a foundational tool for developing therapies aimed at extending healthy lifespan and treating age-related conditions.

Description of the video below, in italics, below:

Today, we talk about stem cells and how we can convert differentiated body cells into induced pluripotent stem cells (iPS cells) by using the Yamanaka factors. Stem cells are special types of cells which have the capacity to self-renew and the ability to generate differentiated cells. Differentiation is the process in which stem cells specialise (eg they become a neuron). In other words, stem cell differentiation means that the potency of a cell becomes more restricted. There are embryonic and adult stem cells. While embryonic stem cells are mostly pluripotent (can become nearly all existing cell types), adult stem cells are multipotent, oligopotent or unipotent. Hematopoietic stem cells are multipotent stem cells, as they give rise to all kind of cells in our blood. For decades scientists thought that differentiated cells cannot be reprogrammed into stem cells. This paradigm however shifted when Shinya Yamanaka identified and activated the Yamanaka factors in fibroblasts (Yamanaka factors are the four genes Oct3/4, Sox2, Klf4 and c-Myc). In his experiments, Yamanaka infected murine cells with viral particles which contained the Yamanaka factors. As a consequence, the differentiated cells became induced pluripotent stem cells. For the generation of iPS cells by the usage of Yamanaka factors, Shinya Yamanaka was awarded with the Nobel Prize in Physiology or Medicine in 2012. There are numerous possible applications for iPS cell technology (using Yamanaka factors). We can use iPS cells to generate tissues or organs for organ transplantations. In Germany for example, the annual number of post-mortem organ donations in Germany has declined by more than 30% since 2010. One major drawback of using iPS cells, however, is the risk of provoking cancer in the patient. Many of the genes, which are active in stem cells through Yamanaka factors are also active in cancer cells. Therefore, scientists are trying to develop safer protocols for the generation of stem cells (which partially include Yamanaka factors). In 2014, the first clinical study using human iPS cells products was launched. Here, iPS cells were generated from a patient who suffered from macular degeneration. These iPS cells were then transformed into retinal pigment epithelial cells and transplanted into the eyes of the patient. The therapy has resulted in positive results, stopping macular degeneration and improving the vision of the patient. Further studies need to be conducted in order to start the era of iPS cells based transplanation, in the video published on Jun 16, 2024, by Sciencerely, as “How To Make Stem Cells| Yamanaka Factors“, below:

Description of the video below, in italics, below:

Nobel Laureate Professor Shinya Yamanaka delivered the lecture ‘A New Era of Medicine with iPS Cells’ at the University of Oslo in September 2017. Professor Yamanaka visited Norway and Sweden as part of the Nobel Prize Inspiration Initiative. There he met scientists in Oslo and Gothenburg, discussing his career, his work and the ethics of stem cell research. Through the Initiative, Nobel Laureates offer career advice for scientists, explain their discoveries and give insights into life after the Nobel Prize. To hear more insights from Nobel Laureates please subscribe to our YouTube channel or visit www.nobelprizeii.org. in the video published on Sep 17, 2017, by NobelPrize as “A New Era of Medicine with iPS Cells – Lecture by Professor Shinya Yamanaka“, below:

Description of the video below, in italics, below:

Yamanaka factors are a set of genes that were discovered by scientist Shinya Yamanaka in 2007. These factors are involved in cellular reprogramming, which converts adult cells into pluripotent stem cells or cells capable of generating diverse cell types in the body. Yamanaka and his team identified a combination of four genes that, when introduced into adult cells, could revert them back to a pluripotent state. This groundbreaking discovery earned Yamanaka the Nobel Prize. Undoubtedly, the implications of Yamanaka factors are significant. They offer the potential for regenerative medicine and the development of personalized therapies. To learn more, here’s Dr. Andrew Steele, in the video published on June 27, 2023, by The Proof with Simon Hill (Clips), as “What Are Yamanaka Factors?|Andrew Steele, PhD|The Proof Clips EP #262“, below:

Description of the video below, in italics, below:

In the video published on Jan 17, 2024, by Dr. Gabrielle Lyon, as “Can Yamanaka Factors Reverse Aging?| Kevin Murach PhD“, below:

Gathered, written, and posted by Windermere Sun-Susan Sun Nunamaker More about the community at www.WindermereSun.com

Any comments, suggestions, concerns regarding this post will be welcomed at info.WindermereSun@gmail.com

We Need Fair Value of Solar

~Let’s Help One Another~

Please also get into the habit of checking at these sites below for more on solar energy topics:

www.sunisthefuture.net

www.kiva.org/team/sunisthefuture

www.facebook.com/sunisthefuture

Tags: Ad advertise advertisement advertising Andrew Steele PhD Dr. David Sinclair Dr. Gabrielle Lyon genes iPS cellls Kevin Murach PhD medicine Nobel Prize Nobel Prize Inspiration Initiativ physiology pluripotency Professor Shinya Yamanaka rejuvenation Reverse Aging Revolution Sciencerely stem cell research stem cells Susan Sun Nunamaker Sweden Windermere Windermere Sun www.WindermereSun.com Yamanaka Factors

Susan Sun Nunamaker

I am a mother and a wife, math professor, solar advocate, world traveler, yogi, artist, photographer, sharer of knowledge/information, and resident of Central Florida. I've worked professionally in applied math, engineering, medical research, and as a university math professor in IL and FL for over 25 years. My husband and I loved Disney and moved down to Central Florida initially as snowbirds. But we've come to love the warmth and friendly people offered by this community and decided to move down to Central Florida full time in 2006. I am now spending time sharing information/ knowledge online and developing Windermere Sun (http://www.WindermereSun.com) as an online publication, sharing and promoting Community ABC's (Activities-Businesses-Collaborations) for healthier/happier/more sustainable living. ~Let's help one another~ Windermere Sun-Susan Sun Nunamaker Founder/Owner/Editor/Producer of Windermere Sun email: info.WindermereSun@gmail.com X (aka:Twitter): @WindermereSun