Stem Cells
The body contains organs such as bone, brain, heart and genitalia
In these organs, the original cells that divide and produce all the different cells are called stem cells
One of the stem cells is the female egg, which is fertilized with the male's sperm
A single cell, called a zygote, after fertilization, is the "source of evil" for human development.
Zygote(Totipotent Stem Cell)
As a universal stem cell, it can form any type of cell and umbilical cord and placenta in the body
A few times after the zygote is divided, it turns into an early embryo called blastocyst
The embryonic stem cells from the blastocyst cells (pre-embryonic embryo)
The stem cell (pluripotent)
Embryonic stem cells are pluripotent stem cells that can form any cell in the body
But embryonic stem cells do not form the umbilical cord or embryo of an embryo
The embryonic stem cells in the lab contribute to the remaining embryos produced during in vitro fertilization
In vitro fertilization is an operation that helps women conceive
Another type of stem cell is adult stem cells
These cells can be found in certain organs in adults, such as skin
Adult stem cells are versatile (note, not all-powerful)
This means that they can only differentiate into cells related to their organs
For example, adult stem cells in the skin can be divided into new skin adult stem cells
It can also be specialized as normal skin cells, replacing cells that are lost because of aging or injury
In the lab, scientists are now able to take a normal cell
Skin cells, for example, induce or produce pluripotent stem cells, such as embryonic stem cells
These induced pluripotent stem cells can be any type of cell in the body
Scientists are working on stem cells to see how they become a variety of cells
In the future, these cells can be used to regenerate damaged or disease-free tissues and organs
Stem Cell Therapy
Stem cell therapy is a way to treat disease with stem cells
Currently, stem cells can treat blood system diseases and cancers, such as leukemia
The bone marrow of a patient with leukemia causes many abnormal white blood cells, unable to resist infection
Over time, these abnormal white blood cells will replace the white blood cells of healthy cells
Stem cell transplantation for leukemia, hematopoietic stem cell transplantation (also known as bone marrow transplantation)
Doctors will draw blood or bone marrow samples from patients or donors
In some cases, the donor blood may come from the baby, the cord blood
Cord blood often contains healthy hematopoietic stem cells
The doctor first gives the patient chemotherapy or radiotherapy to kill abnormal white blood cells and abnormal stem cells
Once the abnormal cells are eliminated, the doctor will transplant healthy stem cells into the patient
These healthy stem cells produce new blood cells, including normal white blood cells
In this way, the body's defense will be rebuilt and normal