Houston Regenerative Medicine

What is Stem Cell Therapy? Understanding the Basics

What is Stem Cell Therapy? Understanding the Basics

Stem cell therapy is a kind of treatment that uses stem cells to repair or replace damaged cells in the body. This can help treat various illnesses and injuries, from blood-related conditions to repairing tissues in the body, like nerves or muscles. In modern medicine, stem cell therapy has the potential to change how we treat diseases that currently have limited options. As research continues, this therapy could offer new ways to improve health and longevity, making it a pivotal area of medical science. Its ability to heal and regenerate offers hope for better treatment outcomes in many challenging medical cases.

What are Stem Cells?

Stem cells are special human cells that have the potential to develop into many different cell types, from muscle cells to brain cells. In some cases, they also have the ability to repair damaged tissues, a fundamental aspect of regenerative medicine. Understanding what stem cells are and how they work is crucial in realizing the full potential of what is stem cell therapy.

Definition and Properties

Stem cells are defined by two important properties: self-renewal and differentiation. Self-renewal means they can divide and produce more stem cells. Differentiation means they can turn into specific types of cells needed in the body.

Types of Stem Cells

Embryonic Stem Cells

These stem cells come from embryos that are three to five days old. At this stage, an embryo is called a blastocyst and has about 150 cells. Embryonic stem cells are pluripotent, which means they can turn into more than 200 different cell types in the body.

Adult Stem Cells

Adult stem cells are found in small numbers in most adult tissues, such as bone marrow or fat. Compared to embryonic stem cells, they have a more limited ability to give rise to various cells of the body, which traditionally made them less promising for regenerative medicine. However, their ability to replace dead cells as needed is invaluable.

Induced Pluripotent Stem Cells (iPSCs)

Scientists create iPSCs by introducing genes into adult stem cells that increase their ability to differentiate. This makes them very similar to embryonic stem cells in their capabilities, but they are derived from adult tissues.

Perinatal Stem Cells

These stem cells come from amniotic fluid and the umbilical cord blood. They have the ability to change into specialized cells and represent a promising area of research due to their accessibility and lower ethical concerns compared to embryonic stem cells.

Sources of Stem Cells

Stem cells can be derived from a variety of sources, each holding unique potential for medical treatments. Knowing these sources helps in understanding the wide range of applications in regenerative medicine and other medical conditions.

  • Embryonic Sources: These are obtained from embryos at a very early stage of development. They are pluripotent, which allows them to develop into any type of stem cell required for therapy.
  • Adult Sources: Found in adult tissues, these stem cells are typically used to generate replacements for cells that are lost through normal wear and tear, injury, or disease.
  • Perinatal Sources: Stem cells from amniotic fluid and umbilical cord blood, known for their ability to convert into specialized cells more easily than adult stem cells.
  • Induced Pluripotent Stem Cells: These are adult cells that have been genetically reprogrammed to an embryonic stem cell-like state. iPSCs are a powerful source for creating a patient-specific cell without the ethical concerns associated with embryonic stem cells.

Clinical Applications of Stem Cell Therapy

Stem cell therapy offers exciting possibilities across various diseases, from autoimmune diseases to orthopedic injuries:

  • Type 1 Diabetes: Potential to regenerate insulin-producing cells, which could dramatically change treatment for this condition.
  • Parkinson’s Disease: Aims at repairing damaged brain cells, offering hope for restoring motor functions.
  • Cardiovascular Diseases: Used to regenerate heart tissue after heart attacks, improving heart function.
  • Blood Disorders: Effective in treating conditions like leukemia, lymphoma through the replacement of blood cells that are damaged by the disease or by treatments like radiation therapy.
  • Orthopedic Conditions: Helps in healing bone and cartilage injuries, utilizing healthy stem cells to repair and replace damaged tissue.

Each type of stem cell brings potential to treat a diverse array of health issues, providing crucial options for enhancing patient care and treatment outcomes.


Stem cell therapy stands out as a transformative approach in treating a wide range of medical conditions, from autoimmune diseases to severe cardiovascular issues. With various stem cell types available, including embryonic, adult, and induced pluripotent stem cells, the possibilities for effective treatments continue to expand. These cells’ unique capabilities to regenerate and repair tissue offer hope for better health outcomes. 

The clinical applications of stem cells are vast, demonstrating significant potential in managing and possibly curing previously untreatable conditions. As research progresses, stem cell therapy promises to play an even more critical role in advancing medical science and patient care.