What are Stem Cells?

About Stem Cells:

• These are cells with the potential to develop into many different types of cells in the body.
• Under the right conditions in the body or a laboratory, stem cells divide to form more cells called daughter cells.
• These daughter cells become either new stem cells or specialized cells (differentiation) with a more specific function, such as blood cells, brain cells, heart muscle cells or bone cells.
• No other cell in the body has the natural ability to generate new cell types.
• They serve as a repair system for the body.
• Stem cells are present inside different types of tissue. Scientists have found stem cells in tissues, including the brain, bone marrow, blood, and blood vessels, etc.
• There are two types of stem cells.
  • Embryonic stem cells:
    • These stem cells come from embryos that are 3 to 5 days old.
    • At this stage, an embryo is called a blastocyst and has about 150 cells.
    • These are pluripotent stem cells, meaning they can divide into more stem cells or can become any type of cell in the body. 
    • This versatility allows embryonic stem cells to be used to regenerate or repair diseased tissue and organs.
  • Adult stem cells:
    • These stem cells are found in small numbers in most adult tissues, such as bone marrow or fat.
    • Compared with embryonic stem cells, adult stem cells have a more limited ability to give rise to various cells of the body.

What is Induced pluripotent stem cells?

• These are adult stem cells that have been changed in a lab to be more like embryonic stem cells.
• These cells behave in a similar way to embryonic stem cells, so they could be useful for developing a range of therapies.

 

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Q1) What is a blastocyst?

A blastocyst is a cluster of dividing cells made by a fertilized egg. It’s the early stage of an embryo.A blastocyst forms about five to six days after a sperm fertilizes an egg. Layers of cells in the blastocyst divide and separate. They eventually become the structures that protect and nourish the developing fetus.

Source: Kanpur’s GSVM becomes 1st institute to cure blindness through stem cell transplants