Degenerative diseases and serious injuries represent a constant challenge for medicine. Every year, millions of people seek treatments that can restore lost functions and improve quality of life. Today, hope comes from a special type of cell that has the potential to regenerate tissue: stem cells.
With over 3,000 laboratory tests, and with support in managing your business and boosting the development of new scientific and clinical projects, at Ambar Lab we believe that stem cell research opens doors to innovative therapies. Furthermore, it raises important questions about its origin, its applications, and its limitations. In this article, we analyze the main sources of stem cells, advances in their use, the diseases that could be treated with them, and much more. Join us to find out!
What are stem cells and what are they used for?
Stem cells are unspecialised cells that have the ability to divide and transform into other cell types. This plasticity gives them a central role in regenerative medicine. Unlike differentiated cells, which perform very specific functions, stem cells act as a natural repair system, as they can replace damaged or ageing cells.
In medical terms, they are used to regenerate tissue, treat blood disorders, restore damaged organs and, in the future, could be used in advanced therapies that are still in the research phase. From a scientific perspective, they are also a valuable model for studying how organisms develop and how certain diseases progress.
How are stem cells obtained?
Let us now look at the different sources from which stem cells can be obtained.
Embryonic stem cells (ESCs)
This type of stem cell is obtained from embryos in very early stages of development, generally at the blastocyst stage. They are pluripotent, which means they can transform into almost any cell in the body: neurons, hepatocytes, cardiomyocytes, among others.
For this reason, they are considered to have enormous potential for biomedical research. They can be used to recreate diseases in the laboratory, test drugs and understand human development processes. However, obtaining them involves the destruction of the embryo, which raises ethical and legal issues that vary from country to country. In Spain, their use is strictly regulated, which limits their direct clinical application, although they remain a crucial field of study.
Adult stem cells (ASC)
In the adult body, there are reserves of stem cells located in specific tissues such as bone marrow, peripheral blood, adipose tissue, and even the intestinal epithelium. These cells are multipotent, meaning they have the ability to develop into various cell types, albeit within a limited range.
A classic example of application is bone marrow transplantation, which is used to treat leukaemia and lymphoma. Its applications are also being explored in muscle tissue regeneration after a heart attack, in cartilage damaged by osteoarthritis, and in therapies for immunological diseases. Because they are obtained from the patient themselves (autologous transplant), they drastically reduce the risk of rejection, which is a very important clinical advantage.
Recent research has demonstrated that even adipose tissue is a rich and accessible source of stem cells, with potential in aesthetic and reconstructive therapies.
Umbilical cord blood stem cells
After birth, the blood contained in the umbilical cord and placenta is rich in haematopoietic stem cells, which are responsible for generating the components of the blood and the immune system.
The great advantage of this type of cell is that harvesting them is painless, safe and non-invasive. Furthermore, they can be stored in both public and private umbilical cord banks, opening up the possibility of using them in future treatments for the child itself or for compatible third parties.
In medical practice, they have been successfully used in transplants to treat childhood leukaemia, hereditary metabolic diseases and certain types of immunodeficiencies. Another positive point is that they require a lower degree of compatibility than bone marrow cells, which broadens their range of applicability.
Induced pluripotent stem cells (iPSCs)
They were discovered in 2006 and represent one of the greatest milestones in modern biology. They are obtained from adult cells (such as skin fibroblasts) that are reprogrammed in the laboratory to recover a state similar to that of embryonic cells.
iPSCs are pluripotent and therefore have the ability to become almost any cell type. Their main value lies in the fact that they avoid the ethical dilemmas associated with embryonic cells, as they are generated without the need to destroy embryos.
In research, they are used to model diseases, study cell degeneration processes, and test new treatments. They also open the door to personalised therapies, as they can be manufactured from the patient’s own cells. However, work is still being done to improve safety, as there is a risk of mutations during the reprogramming process.
What diseases can stem cells cure?
The list of diseases in which stem cells have proven useful grows every year. Their established application is in the field of haematology: leukaemia, lymphoma, myeloma and severe anaemia are treated with bone marrow or umbilical cord blood transplants.
Beyond these, their benefits in cardiology are being investigated, seeking to regenerate tissue after a heart attack and improve cardiac function. In neurology, clinical trials are exploring their use in the treatment of Parkinson’s disease, multiple sclerosis and spinal cord injuries, with promising results in some pilot cases.
Ophthalmology has also found applications: there are stem cell therapies to regenerate the cornea and treat certain forms of blindness. In
How is genetic compatibility ensured in stem cell transplants?
One of the biggest challenges in transplants is avoiding immune rejection. To do this, the genetic compatibility between donor and recipient is analysed using the HLA (human leukocyte antigen) system. These markers are proteins that help the immune system distinguish between its own cells and foreign cells.
The greater the match in HLA antigens, the greater the likelihood that the transplant will be successful and complications such as graft-versus-host disease will be reduced. In bone marrow transplants, the closest possible match is sought, which often means turning to siblings or relatives as the first candidates.
In the case of umbilical cord blood, the requirements are less stringent, as the cells are more immature and tend to adapt more easily to the recipient’s body. For this reason, cord blood banks are a valuable tool for expanding treatment options for patients without compatible family donors.
Innovation that transforms lives
Technology advances year after year, opening up new possibilities for regenerative medicine. Stem cell research continues to offer innovative solutions for treating diseases, repairing tissues and improving the quality of life for millions of people, while also inviting us to reflect on its ethical and scientific limits.
If you would like to learn more about stem cell applications or find out how we can help you, Ambar Lab is here to support you. We have a team of professionals and the most advanced technology to support both research and the development of clinical and scientific projects, ensuring reliable results and an ethical approach at every stage of the process.
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