- Stem cells differ in how many cell types they can become and where they come from.
- Embryonic and induced cells can become almost anything, which is also what makes them hard to control.
- Umbilical cord blood and cord tissue (Wharton’s jelly) are different sources with different uses.
At a family dinner someone says “stem cells” and suddenly everyone is an expert. Your cousin read they come from embryos. Your uncle heard they come from fat. Your neighbor’s friend banked her baby’s cord blood. Here is the twist: they are all partly right, because there are several very different kinds.
This is a field guide to the main types, what makes each one special, and where each one is actually used today. No lab coat required.
What makes a cell a stem cell?
Two talents. A stem cell can make copies of itself, and it can give rise to more specialized cells, like bone, cartilage or blood. How many different cell types it can become is called its potency.
Think of a stem cell as a student who has not chosen a career yet. Some can still become anything; others have narrowed it down to a few fields.
Embryonic stem cells: the blank slate?
These come from very early embryos, usually left over from in vitro fertilization. Scientists first grew human embryonic stem cell lines in 1998. They are pluripotent, which makes them a powerful research tool.
Two questions follow them: the ethical debate about using embryos, and the tight control that cells able to become anything need to grow the right way. Their clinical use is limited to carefully regulated trials.
Induced pluripotent cells: reprogrammed adults
In 2006, Japanese researchers showed that ordinary adult cells, like skin cells, could be reprogrammed back into a pluripotent state with a handful of genes. These are iPSCs, and the discovery earned a Nobel Prize.
They avoid the embryo question and can be made from your own cells. The catch: the reprogramming can leave genetic changes behind, and like embryonic cells, they need tight control. Today they are mostly used to study diseases and test drugs, with early clinical trials underway.
Adult stem cells: the repair crew
Your body keeps small reserves of stem cells in many tissues to maintain and repair them. They are more specialized: blood stem cells make blood, for example. They also tend to lose some vigor with age.
One family matters most in regenerative medicine: mesenchymal stem cells (MSCs). They are found in bone marrow, fat and umbilical cord tissue, and they are defined by international lab criteria. Their main talent is not transforming, but releasing signals that calm inflammation and support repair. Where they come from changes how they behave, which is why the source is always worth asking about.
Cord blood or cord tissue: what is the difference?
They are often confused, and they should not be. Umbilical cord blood is rich in blood-forming stem cells and is used in transplants for certain blood disorders. That is what families bank at birth.
Wharton’s jelly is the soft tissue inside the cord itself. It is a source of mesenchymal stem cells, collected from cords donated after healthy births, with no harm to mother or baby. Same cord, different tissue, different cells.
And Muse cells?
Muse cells, short for multilineage-differentiating stress-enduring cells, were described in 2010 by a team in Japan as a rare, stress-tolerant subgroup found within mesenchymal cell populations. In lab studies they could produce cells of all three germ layers without forming tumors in mice.
They are an active research area, with early-stage clinical studies. Stem Cells Colombia does not offer Muse cells: the doctors decided there is not yet enough published research. The doctors prefer to work with the cells that have the deepest body of research: Wharton’s jelly mesenchymal cells.
- When a clinic says “stem cells”, ask which type and from which tissue.
- Cord blood and cord tissue (Wharton’s jelly) are different sources with different uses.
- Be wary of anyone who claims one cell type is proven best for everything.
The main types of stem cells and how to define them are well established in the scientific literature. How each type helps a specific condition is studied in clinical trials, condition by condition, and research is growing.
- Embryonic stem cell lines derived from human blastocysts · Science, 1998
- Induction of pluripotent stem cells from mouse embryonic and adult fibroblast cultures by defined factors · Cell, 2006
- Minimal criteria for defining multipotent mesenchymal stromal cells. The International Society for Cellular Therapy position statement · Cytotherapy, 2006
- Unique multipotent cells in adult human mesenchymal cell populations · Proceedings of the National Academy of Sciences of the United States of America, 2010
Questions
Do you use embryonic stem cells?
No. Stem Cells Colombia uses only mesenchymal stem cells from Wharton’s jelly, the tissue of the umbilical cord.
Is Wharton’s jelly the same as cord blood?
No. Cord blood is rich in blood-forming stem cells; Wharton’s jelly is the cord tissue and a source of mesenchymal stem cells.
Do you offer Muse cells?
No. Stem Cells Colombia does not offer Muse cells: the doctors decided there is not yet enough published research.
Is stem cell therapy approved by the FDA?
Stem cell therapy is not approved by the FDA, but in Colombia it is legal.