The body triggers an immune reaction in response to a transplanted organ, since the recipient's body does not recognise the organ as part of itself. i.e the DNA of the transplanted organ, and the DNA of the person do not match (unless they are identical twins); the recipient's immune system reacts against the new DNA and attempts to 'kill it off'; similar to how the human immune system reacts to cold and 'flu virus' (which are made of something called RNA, not DNA) . This response is called "organ rejection"- the patient's body rejects the transplanted organ. Organ rejection is usually preventable by taking a type of drug called an "immunosuppressant".
Each cell in the human body has certain receptors (MHC also called HLA receptors) that will identify the cell as part of that body. Everybody has their own genes inherited from their mother and father to determine the form the receptors will be and therefore it is very rare to find two people with the same MHC receptors.
Your immune cells will be go around and bind to these receptors and if it does not recognize a receptor it will often initiate the destruction of the cell.
Since it is very difficult to find two people with identical MHC receptors often times for transplant they only require a certain percentage of similarity to be a match and even then it is rarely a 100% match. Therefore after the transplant if the difference between the transplanted organ MHC receptors and that of the receivers cells is too great the person's immune system will signal for the destruction of the transplanted cells.
Yes that is correct. So the recipient has to take anti rejection medication for the rest of their life.
organnelle system
Rejection Reaction occur
Rejection
fight against illnesses
The immune system reacts to foreign substances.
Immune Attack was created on 2008-05-23.
When your body fires an immune response against a toxin it cannot kill, your immune system becomes either Th1 or Th2 dominant. This attack is against your own tissues (where the toxin is lodged).There are 3 types of toxins:Bio-toxin (Lyme, HIV, etc.)Chemo-toxin (Mercury, Lead, etc.)Food-Based toxin (Gluten protein, Dairy protein)
No, immune doesn't mean to fight against. Immune means something is unaffected.
the immune system helps protect the body inside and outside using red blood cells and white blood cells it helps attack the diseases and defends your body from and any other thing that may be harmful
Food allergies occur when the immune system mounts an attack on certain proteins in certain foods. The substances in the food that trigger this immune-system response are called allergens. The immune system is a complex network of cells and molecules that help defend the body against foreign substances. When a properly functioning immune system detects a foreign substance, it responds to this threat by producing proteins called antibodies against the invaders. The antibodies will recognize and attack this foreign substance when they next encounter it. This "battle" is what causes the allergy symptoms.
HIV attacks Acquired Immune system.
Antibodies can cause rejection of the donor organ/ tissue within minutes if the person receiving the organ already had antibodies against the donor. Rejection of donated blood involves antibodies which form the basis of the immune response triggered by the donation. Rejection of a donated kindey or heart involves both antibodies and cell mediated immunity.
viruses, diseases
Auto-immune reaction
Lysozymes