What are antibodies?  

Immune proteins. Antibodies are complex proteins made by the immune system to act against bacteria, viruses, or other infections. They also are active in signaling between different types of cells and in the activity of cells of the immune system.
Part of immune syste. Antibodies are proteins made by your immune system to attach to things that the immune system is trying to eliminate from your body, such as bacteria and viruses. Normally they are made only against foreign substances (i.e. Those not naturally occurring in the body). Certain drugs, like Avastin (bevacizumab) for example, are also made as antibodies.
A protein... An antibody is a protein that is used by the immune system to identify and neutralize foreign objects such as viruses and bacteria.

Related Questions

What are antibodies and how do they help?

Bind to site(s). Antibodies (abs) are molecules made to bind to sites on infected cells, bacteria, viral particles, etc. To help the immune system fight disease. For example, monoclonal antibodies bind to the same epitope/site, while polyclonal abs bind to many sites. These can be used in treating cancer and hdnb, autoimmune diseases, like rheumatoid arthritis, and in diagnostic tests, like western blot. Read more...

What is antibody therapy?

Targeted therapy. The body's immune system normally makes antibodies that kill viruses, bacteria and even cancer cells. We have learned to make antibodies that are very specific to different cancers and we can add extra drugs to them that are only delivered to the cancer cells. Thus, we have "targeted" therapy to the specific cancer. These drugs show great promise alone or in combination with regular chemotherapy. Read more...
Biologics. There are several types of therapy that include antibodies. The two most common would be antibody replacement therapy with igg antibodies for immunodeficiency, and specific antibodies designed with to affect a specific disease process that is immunologically mediated such as rheumatoid arthritis or allergic asthma. Read more...
Antibody therapy?? Do you mean immunoglobulin therapy? That is the infusion, either intravenously or subcutaneously, of pooled igg antibodies (aka immunoglobulin). It is used for primary immunodeficiency but also many other rheumatologic disease and hematologic disease. Read more...

What is antibody therapy for cancer?

A great tool. Monoclonal antibodies are anticancer agents designed to bind to a unique protein (the antigen) on cancer cells. Ideally, this antigen is found only on the cancer cells, so our therapy is able to target the cancer cells while causing minimal harm, hence side effects, to normal tissues. Read more...
Good targets. Cancer cells "look" different than normal cells; in other words, they display different proteins on their outside compared to normal cells. Antibodies latch onto proteins and can prevent those proteins from functioning, or they can attract the immune system to kill those cancer cells. So that's a quick overview of how antibody therapy can be used to treat cancer. Read more...
Targeted Rx. Some tumor cells have markers on their surface and are susceptible to damage by antibodies directed at that marker(s). In some lymphomas antibodies directed at markers present on normal cells are also effective. Usually these are monoclonal antibodies that have been specifically designed for use in humans. Read more...

Suffered from thyroiditis for years and recently had thyroidectomy. What do antibodies attack if gland is removed?

Probably nothing. This is a good question. In most cases, hashimoto's thyroiditis is limited to the thyroid. Thyroid gone (or hypothyroidism) and there is no more inflammation. Presumably those antibodies don't attack anything. But people with hashi can get other autoimmune diseases, such as addison's, type 1 diabetes, pernicious anemia, and others. But this is not common. Read more...

What are antibodies c and d in blood after pregnancy?

Rh? Ask your physician whether these are antibodies against components of the rh system. Anti-d is the one that's likely to be troublesome. Read more...

What causes antibodies to suddenly attack the thyroid? Could it be a lack of vitamin d or too much gluten in the body?

Thyroiditis. This is an autoimmune condition that attacks the thyroid and is not related to diet or vitamin levels, but can be associated with other autoimmune conditions. We do not really know what triggers autoimmune conditions in the body in general. Read more...

My ANA test results are positive with 1:320 centromere. I have moderate fatigue and joint pain. What further antibody testing is usually suggested?

Positive anti. Centromere antibody is highly sensitive and specific for scleroderma/crest syndrome.It could also be positive in other autoimmune conditions like sjogrens and primary biliary cirrhosis.I don't think u need more testing.Take care and god bless u! http://www.Ncbi.Nlm.Nih.Gov/m/pubmed/6384675/http://en.M.Wikipedia.Org/wiki/anti-nuclear_antibody http://www.Herbalremediesadvice.Org/autoimmune-diseases. Read more...

What is pra antibody?

Panel Reactive antib. Pra ( panel reactive antibodies ) or anti hla antibodies, is used in transplantation surgery , is how the body is going to react to transplantation. Hla testing or human leukocyte antibody cross matching is essential in organ transplantation like kidney. Read more...

Need expert help here. What are the antibodies that causes hdn?

ABO. If by hdn you mean hemolytic disease of the newborn, ABO incompatibility between mother and baby, and ABO antibodies are the commonest cause. Antibodies to rh blood group types can also cause hdn, and uncommonly antibodies to other blood groups are involved. See this site for more info. http://www.ncbi.nlm.nih.gov/books/nbk2266/. Read more...