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Updated: Apr 4, 2026
Genetic Analysis of Hereditary Transthyretin Ala97Ser Related Amyloidosis
Published on: June 9, 2018
Rapid detection of wild-type and mutated transthyretins
Masayoshi Tasaki1, Mitsuharu Ueda2, Konen Obayashi3
1Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan Department of Morphological and Physiological Sciences, Graduate School of Health Sciences, Kumamoto University, Kumamoto, Japan.
Background:
Familial amyloid polyneuropathy is caused by a variant transthyretin, which is a serum protein secreted by the liver. We previously reported that mutated transthyretins were detected in serum samples by surface-enhanced laser desorption/ionization time-of-flight mass spectrometry (SELDI-TOF MS). The aim of this study was to evaluate the clinical usefulness of SELDI-TOF MS for diagnosis of transthyretin-related amyloidosis.
Methods:
We used 106 serum samples obtained from patients who were clinically suspected of having amyloidosis between February 2011 and April 2014. SELDI-TOF MS allowed analysis for transthyretin via a 3-h one-step procedure.
Results:
Of the 106 patients, 51 are transthyretin amyloidosis. Mutated transthyretins were detected in serum samples from 30 of 51 patients with transthyretin amyloidosis. The results of genetic analysis showed that all of those patients had mutations in the transthyretin gene. For all 18 patients with senile systemic amyloidosis of 51 patients with transthyretin amyloidosis, SELDI-TOF MS detected only wild-type transthyretin peaks, not mutated transthyretin peaks.
Conclusion:
SELDI-TOF MS is a clinically useful tool for diagnosis of transthyretin-related amyloidosis.
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