TNF alpha Inhibitor and blocker
TNF alpha is a protein that the body produces during the inflammatory response, the body's reaction to injury. TNF alpha promotes the inflammation and its associated fever and signs (pain, tenderness, and swelling) in several inflammatory conditions including rheumatoid arthritis and ankylosing spondylitis. For more information on autoimmune diseases.
TNF blocker side effects
TNF alpha antagonists are effective in the treatment of chronic inflammatory
joint disease. Despite a good overall safety profile, they can induce a number
of side effects, including autoimmunity and infections. A link between TNF alpha
antagonists and vasculitides has been suggested. A major concern surrounding the
use of TNF-alpha inhibitors is their potential to increase the risk of
opportunistic infections, particularly
tuberculosis.
Granuloma
annulare skin lesions have developed in patients during anti-tumor necrosis
factor (TNF) therapy.
Optic neuritis has been reported in some patients taking TNF blockers.
Optic neuritis occurring with anti-tumour necrosis
factor {alpha} therapy.
Ann Rheum Dis. 2007 Sep;66(9):1255-8. MD, Professor in Rheumatology, GATA
Romatoloji BD, 06018, Etlik, Ankara, Turkey.
Various demyelinating disorders have been reported in association with anti-tumour
necrosis factor alpha TNFalpha agents. The objective of this study was to review
the occurrence, clinical features and outcome of optic neuritis during treatment
with anti-TNFalpha agents. Discussion: Patients being treated with a TNFalpha
antagonist should be closely monitored for the development of ophthalmological
or neurological signs and symptoms. Furthermore, consideration should be given
to avoiding such therapies in patients with a history of demyelinating disease.
If clinical evaluation leads to the diagnosis of optic neuritis, discontinuation
of the medication and institution of steroid treatment should be a priority.
TNF inhibitors for rheumatoid
arthritis
Three TNF-alpha antagonists are available for the treatment of rheumatoid
arthritis: Etanecerpt, infliximab, and Adalimumab.
Etanercept
is a recombinant TNF-alpha receptor Fc fusion protein that binds soluble TNF-alpha,
thereby rendering TNF-alpha unavailable to bind cell surface TNF-alpha
receptors. Subcutaneous injection is administered twice weekly. Etanercept may
be used in combination with methotrexate. Etanercept is a
synthetic protein that binds to TNF alpha. It thereby acts like a
sponge to remove most of the TNF alpha molecules from the joints and blood. This
prevents TNF alpha from promoting inflammation and the fever, pain, tenderness
and swelling of joints in patients with rheumatoid or psoriatic arthritis and
ankylosing spondylitis.
Infliximab reduces the amount of active tumour necrosis factor alpha in the
body by binding to it and preventing it from signaling the receptors for TNF
alpha on the surface of cells.
Adalimumab, a fully humanized monoclonal antibody, is the newest
TNF-alpha antagonist approved for the treatment of rheumatoid arthritis and is
administered subcutaneously every 2 weeks. Cases of bone marrow suppression and
elevation of serum transaminase levels have been reported.
TNF inhibitor
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