Exosomes have been rapidly gaining attention in recent years in the fields of regenerative medicine and cosmetic medicine.
While you may hear it more often in connection with keywords related to stem cell culture supernatant and regenerative medicine, "microRNA" is attracting attention as the entity that supports its essential function.
Exosomes are not simply "cell capsules."
Within these cells are a variety of bioactive substances that facilitate communication between cells, and microRNAs in particular are being studied as important factors deeply involved in cell function, aging, inflammation, and regenerative capacity.
This time, we will provide a clear explanation of the relationship between exosomes and microRNA, which can be considered the core of next-generation regenerative medicine, based on the latest research.
What is microRNA?
microRNAs are extremely small RNA molecules, consisting of approximately 22 base pairs.
It acts like a "gene switch" that controls the expression of proteins made from DNA, and regulates cell proliferation, differentiation, inflammatory responses, and aging.
Currently, thousands of types of microRNAs have been identified, each with a different function.
for example,
- microRNAs that suppress inflammation
- microRNAs that promote collagen production
- microRNAs that activate angiogenesis
- microRNAs that act on senescent cells
A wide range of functions have been reported, including those mentioned above.
In recent years, research in regenerative medicine has led to a growing idea that microRNAs within exosomes secreted by stem cells, rather than the stem cells themselves, may play a more important role.
Exosomes are "information transmission capsules."“
Exosomes are extremely small extracellular vesicles, approximately 30-150 nm in diameter, that are secreted by cells.
Inside this small capsule,
- microRNA
- mRNA
- protein
- growth factors
- Lipids
These include substances that play a role in delivering information to other cells.
In other words, exosomes are like "messengers" that allow cells to communicate with each other.
In particular, stem cell-derived exosomes are thought to send signals to damaged tissue and inflammatory sites, and are involved in improving the tissue repair and regenerative environment.
Why is microRNA attracting so much attention?
Traditional regenerative medicine has primarily focused on "transplanting cells."
However, current attention is focused on the possibility that it is not the cell itself, but rather the microRNAs within the exosomes secreted by the cell that are responsible for the regeneration signal.
For example, "miR-423-5p," found in exosomes of adipose-derived stem cells, has been reported to potentially promote angiogenesis and aid in tissue repair.
Furthermore, skin aging research has shown that "miR-29b-3p" may reduce photoaging caused by UV damage, and it is attracting increasing attention in the field of cosmetic medicine.
Furthermore, studies have reported that "miR-125b," contained in exosomes derived from young cells, improved wound healing ability.
These studies suggest that microRNAs may not just be cofactors, but may be functioning as a "command center for regeneration."
Expectations in the field of anti-aging care
In the fields of beauty and anti-aging, research on exosomes and microRNAs is particularly active.
As we age, intercellular communication declines, leading to increased inflammation, oxidative stress, and a decrease in tissue repair capacity.
It has become clear that the balance of microRNAs also changes during this process.
Currently,
- skin regeneration
- Hair care
- Inflammation suppression
- wound healing
- conditioning
Research into its various applications is progressing.
On the other hand, the exosome market is expanding rapidly, and it has been pointed out that some products lack sufficient scientific evidence. Discussions are also progressing overseas regarding the importance of regulations and quality control.
Therefore, it is believed that factors such as "which cells the product originates from," "which microRNAs it contains," and "whether quality control is appropriate" will become more important in the future.
Next-generation regenerative medicine is shifting from "cells" to "information".
Regenerative medicine is currently at a major turning point.
Up until now, the focus has been on "medical treatment involving cell transplantation," but in the future, it may evolve into "medical treatment that utilizes the information contained within cells."
At its heart lies the microRNA contained within the exosome.
While many areas are still in the research stage, advances in microRNA analysis technology are expected to potentially lead to the realization of "personalized regenerative medicine" tailored to individual constitutions and aging conditions in the future.
The essence of exosome research may not be mere fads, but rather a challenge to life science itself: "How do cells transmit information and promote regeneration?"
Comment