Amyloidosis

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amyloidosis

[‚am·ə·loi′dō·səs]
(medicine)
Deposition of amyloid in one or more organs of the body.

Amyloidosis

 

or amyloid dystrophy, a disorder of protein metabolism accompanied by the formation within tissues of a specific protein polysaccharide complex known as amyloid. The progress of the disease is associated with distortion of the protein-synthesizing function of the reticuloendothelial system and with accumulation of anomalous proteins in the blood plasma which act as autoantigens and also stimulate the formation of autoantibodies. As a result of antigen-antibody interaction, there is deposition of widely dispersed proteins which figure in the formation of amyloid. Once deposited in tissues, such as vascular and gland walls, the amyloid displaces functionally specialized elements of the organ; this process leads to the destruction of the organ.

Several types of amyloidosis are recognized: primary, secondary, and senile amyloidosis; amyloidosis with multiple myeloma; and localized tumorlike amyloidosis. Primary amyloidosis has no connection with any other disease; it affects mainly the cardiovascular system, alimentary tract, muscles, and skin. Secondary amyloidosis develops subsequent to other diseases which are accompanied by prolonged suppuration and tissue breakdown, such as tuberculosis, syphilis, and rheumatoid arthritis. It most often affects the spleen, liver, kidneys, adrenal glands, and intestines. Senile amyloidosis usually involves the heart. Amyloidosis may be either general or localized. Im-munodepressive and hepatic preparations are used in its treatment.

V. V. SEROV

References in periodicals archive ?
In most countries, the peak prevalence of adult AD occurred in the 35- to 44-year-old age group, then fell steadily.
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As in childhood, the sites of involvement in adult AD can be anywhere on the body, but the most common areas of involvement in adults are the flexural areas of the arms and legs, the nape of the neck, and the hands.
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3 years) within 6 months of moderate to severe disease onset, as well as those from age-matched controls and adults, and found that, compared with adult AD, early AD involves comparable or greater epidermal hyperplasia and cellular infiltration, similar strong activation of Th2 and Th22 axes, and some Th1 skewing.
Earlier this year, investigators at Northwestern University, Chicago, reported finding that adult AD patients have increased levels of cardiovascular risk factors (J Allergy Clin Immunol.
In September 2010, after several murders were linked to adult ads on Craigslist, the site announced it would ban sex-related advertising in the United States (in truth, the ads are still there, just well hidden).
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