Sjogren's Syndrome
Medical Author: William C. Shiel Jr., MD, FACP, FACR
Medical Editor: Dennis Lee, MD
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Sjogren's Syndrome Antigen...Getting at the
Cause
Medical Reviewer: William C. Shiel Jr., MD, FACP, FACR
TOKUSHIMA, JAPAN - Antigens are substances that can
stimulate the immune system to develop a response resulting in
the production of an antibody. Antibodies are proteins that can
bind antigens in the normal immune response. When antigen comes
from the body's own tissues (such as a certain tissue protein)
it is referred to as an autoantigen. The antibody that acts against
it is referred to as an autoantibody. When a disease is characterized
by the production of autoantibodies, it is called an autoimmune
disease.
Sjogren's syndrome is an autoimmune disease, characterized
by the abnormal production of extra antibodies in the blood that
are directed against various tissues of the body. This particular
autoimmune illness is caused by inflammation in the glands of
the body. Inflammation of the glands that produce tears (lacrimal
glands) lead to decreased water production for tears and eye dryness.
Inflammation of the glands that produce the saliva in the mouth
(salivary glands, including the parotid glands) leads to mouth
dryness.
Sjogren's syndrome classically combines dry eyes,
dry mouth, and another disease of the connective tissues, most
commonly rheumatoid arthritis.
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What is Sjogren's syndrome?
Sjogren's syndrome is an autoimmune disease. Autoimmune diseases are characterized by the
abnormal production of extra antibodies in the blood that are directed
against various tissues of the body. This particular autoimmune illness features inflammation in certain glands of the body. Inflammation of the
glands that produce tears (lacrimal glands) leads to decreased water
production for tears and eye dryness. Inflammation of the glands that
produce the saliva in the mouth (salivary glands, including the parotid
glands) leads to dry mouth and dry lips.
Sjogren's syndrome with gland inflammation (resulting dry eyes and mouth, etc.) that is not associated with another connective tissue disease is referred to as primary Sjogren's syndrome.
Sjogren's syndrome that is also associated with a connective tissue disease, such as
rheumatoid arthritis, systemic lupus erythematosus, or scleroderma, is referred to as secondary Sjogren's syndrome.
What causes Sjogren's syndrome?
While the exact
cause of Sjogren's syndrome is not known, there is growing scientific support for
genetic (inherited) factors. The illness is sometimes found in other
family members. It is also found more commonly in families that have
members with other autoimmune illnesses, such as systemic lupus
erythematosus, autoimmune thyroid disease, juvenile diabetes, etc. About 90% of patients with Sjogren's syndrome are female.
Next: What are symptoms of Sjogren's syndrome? »
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