Embryonic stem cell

What are embryonic stem cells?

Embryonic stem cell

Acknowledgements and references Embryonic stem cells are grown from cells found in the embryo when it is just a few days old. In humans, mice and other mammals, the embryo is a ball of approximately cells at this stage. These cells are undifferentiated, or unspecialized. They will multiply and differentiate extensively to make the many types of cells needed to form the entire animal.

A mouse blastocyst aged 3.

Embryonic stem cells are obtained from early-stage embryos — a group of cells that forms when a woman's egg is fertilized with a man's sperm in an in vitro fertilization clinic. Because human embryonic stem cells are extracted from human embryos, several questions and issues have been raised about the ethics of embryonic stem cell research. Embryonic stem cells are grown from cells found in the embryo when it is just a few days old. In humans, mice and other mammals, the embryo is a ball of approximately cells at this stage. Stem cells are biological cells that can differentiate into other types of cells and can divide to produce more of the same type of stem cells. They are found in multicellular organisms.. In mammals, there are two broad types of stem cells: embryonic stem cells, which are isolated from the inner cell mass of blastocysts, and adult stem cells, which are found in various tissues.

The process of cell maturation and specialization that would normally take place in the embryo stops. Instead, the cells multiply to make more undifferentiated cells that resemble the cells of the inner cell mass. Embryonic stem cells can make copies of themselves and make other types of more specialized cells Mouse ES cells can be put back into a mouse blastocyst and this blastocyst can then be returned to the uterus of a female mouse to develop into a foetus.

This new mouse with cells from two different origins is known as a chimera. Chimeras can pass on genes from embryonic stem cells to their offspring.

Embryonic stem cell - Wikipedia

Scientists use genetically altered mice made from ES cells to study genes involved in many human diseases. For example, they have made mice with mutations found in human cancers.

Embryonic stem cell - Wikipedia Where can I get more information?
Stem cells: What they are and what they do - Mayo Clinic Advanced Search Abstract The use of human embryos for research on embryonic stem ES cells is currently high on the ethical and political agenda in many countries. Despite the potential benefit of using human ES cells in the treatment of disease, their use remains controversial because of their derivation from early embryos.

These mice can be studied to learn more about how cancers grow and to test potential drugs. By using human ES cells to produce specialized cells like nerve cells or heart cells in the lab, scientists can gain access to adult human cells without taking tissue from patients.

Embryonic stem cell

They can then study these specialized adult cells in detail to see what goes wrong in certain diseases, or to study how the cells respond to potential new drugs.

Human and Mouse ES cells have some different properties. Scientists are trying to understand why this is and whether human cells can be obtained with the same properties as the mouse ES cells.

Researchers are also working to expand and perfect methods for making particular adult cell types from ES cells in the lab. Controlling exactly how ES cells differentiate is still a major challenge.There may not be a greater debate in the medical community right now than that of embryonic stem cell research.

Initially banned by the Federal government, these stem cells often originate from human embryos that were created for couples with reproductive issues and would be discarded.

Apr 14,  · III. Embryonic Stem Cell Research.

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Pluripotent stem cell lines can be derived from the inner cell mass of the 5- to 7-d-old blastocyst. However, human embryonic stem cell (hESC) research is ethically and politically controversial because it involves the destruction of human embryos.

Stem cells are biological cells that can differentiate into other types of cells and can divide to produce more of the same type of stem cells. They are found in multicellular organisms.. In mammals, there are two broad types of stem cells: embryonic stem cells, which are isolated from the inner cell mass of blastocysts, and adult stem cells, which are found in various tissues.

Embryonic stem cell

Embryonic stem cells are grown from cells found in the embryo when it is just a few days old. In humans, mice and other mammals, the embryo is a ball of approximately cells at this stage. What are embryonic stem cells? What are adult stem cells?

When a stem cell divides, each new cell has the potential either to remain a stem cell or become another type of cell with a more specialized function, such as a muscle cell, a red blood cell, or a brain cell. Embryonic stem cells that have proliferated in cell culture for six or more months without differentiating, are pluripotent, and appear genetically normal are referred to as an embryonic stem cell line.

At any stage in the process, batches of cells can be frozen and shipped to .

Embryonic Stem Cell Research Pros and Cons - HRF