Lupus is an autoimmune chronic inflammatory disease that can affect various parts of the body, especially the skin, joints, blood, and kidneys. In lupus, something goes wrong with your immune system, which fights off viruses, bacteria, and germs. Normally our immune system produces proteins called antibodies that protect the body. Autoimmune means your immune system cannot tell the difference between the foreign invaders and your body’s healthy tissues and creates autoantibodies that attack and destroy healthy tissue. These autoantibodies are what cause the inflammation, pain, and damage in various parts of the body. No, it cannot be cured by cord banking from another sibling.
Here's an article explaining in more detail what lupus is:
http://www.lupus.org/webmodules/webarticlesnet/templates/...
Caring for a child with lupus is one of the greatest challenges a family can face. After the diagnosis is made, the first step for parents is to learn as much as possible about the disease and the special needs of a child with lupus. Parents need to educate the child with lupus and their other children plus their child's teachers, and family friends. Your friend will need to become an expert, of sorts, on lupus, and be her daughter's advocate.
Here's an article about adolescents with lupus and what her daughter may go through:
http://www.lupus.org/webmodules/webarticlesnet/templates/...
Here's an article for parents of children living with lupus:
http://www.lupus.org/webmodules/webarticlesnet/templates/...
Here's an article about caregivers (your friend) caring for themselves. She should seek out a support group, and a constructive outlet for the anger she may be feeling in not being able to protect her daughter from this.
http://www.lupus.org/webmodules/webarticlesnet/templates/...
Living with lupus will be restrictive in some ways, but if she does what her doctors say your friend's daughter should be able to live a full life. I myself have fibromyalgia, also an autoimmune disorder, and know this for a fact. Lupus.org has much more information your friend should find helpful and informative.
Be there for your friend, she'll need an understanding person in her corner, God bless her and her daughter.