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Immunoglobulin-related (AL) amyloidosis
Clinical and Experimental Rheumatology
|October 1, 1983
Summary
AL amyloidosis, a plasma cell disorder, involves immunoglobulin light chains forming amyloid fibrils. This condition severely affects organs like the heart and kidneys, with a poor prognosis despite treatment.
Area of Science:
- Hematology
- Nephrology
- Cardiology
Background:
- Amyloid fibrils are the defining component of amyloid substances.
- AL amyloidosis arises from homogeneous immunoglobulin light chains, specifically lambda and kappa light chains.
- This condition is linked to plasma cell dyscrasias, including multiple myeloma and Waldenström's macroglobulinemia.
Purpose of the Study:
- To elucidate the composition and implications of amyloid fibrils in AL amyloidosis.
- To highlight the clinical manifestations and organ involvement in AL amyloidosis.
- To discuss the relationship between AL amyloidosis and other plasma cell dyscrasias.
Main Methods:
- Literature review on amyloid fibril composition.
- Analysis of clinical data regarding organ infiltration in AL amyloidosis.
- Comparison of AL amyloidosis with secondary amyloidosis regarding fibril protein.
Main Results:
- Immunoglobulin light chains, predominantly lambda, form amyloid fibrils in AL amyloidosis.
- Cardiac and renal infiltration are the most severe clinical consequences.
- Peripheral neuropathy, carpal tunnel syndrome, and autonomic disturbances are characteristic features.
Conclusions:
- AL amyloidosis is a manifestation of plasma cell dyscrasias, originating from immunoglobulin light chains.
- Prognosis for AL amyloidosis remains poor, with survival typically under two years post-diagnosis.
- Understanding fibril composition is crucial for diagnosing and managing this systemic disease.