A c.349G>T transversion (p.Ala117Ser) in TTR gene exon 4 was identified in the proband with typical autonomic neuropathy and peripheral motor neuropathy, as well as in his asymptomatic son.
Hereditary ATTR (ATTRm) amyloidosis (also called transthyretin-type familial amyloid polyneuropathy [ATTR-FAP]) is an autosomal-dominant, adult-onset, rare systemic disorder predominantly characterized by irreversible, progressive, and persistent peripheral nerve damage.TTR gene mutations (e.g. replacement of valine with methionine at position 30 [Val30Met (p.Val50Met)]) lead to destabilization and dissociation of TTR tetramers into variant TTR monomers, which form amyloid fibrils that deposit in peripheral nerves and various organs, giving rise to peripheral and autonomic neuropathy and several non-disease specific symptoms.Phenotypic and genetic variability and non-disease-specific symptoms often delay diagnosis and lead to misdiagnosis.
The results suggest an association between presumed nonamyloidogenic mutations in the TTR gene and the development of AN and SFN.Muscle Nerve 57: 140-142, 2017.
Transthyretin-related familial amyloid polyneuropathy (TTR-FAP) typically arises as an autonomic neuropathy primarily affecting small fibres and it occurs in adult patients in their second or third decades of life.
Familial amyloid polyneuropathy (FAP) is an autosomal dominant hereditary systemic amyloidosis caused by mutation of the transthyretin (TTR) gene, and usually shows sensory-dominant polyneuropathy and autonomic neuropathy at the initial stage.
Hereditary ATTRV30M amyloidosis is a lethal autosomal dominant sensorimotor and autonomic neuropathy caused by deposition of aberrant transthyretin (TTR).
Transthyretin familial amyloid polyneuropathy (TTR-FAP) is a highly disabling, life-threatening disease characterized by progressive sensorimotor and autonomic neuropathy.
Autonomic neuropathy is a major component of familial amyloid polyneuropathy (FAP) due to mutated transthyretin, with sudomotor failure as a common manifestation.
Transthyretin familial amyloid polyneuropathy is a hereditary form of amyloidosis characterized by sensorimotor and autonomic neuropathy, cardiac conduction defects, and infiltrative cardiomyopathy.
Familial amyloidotic polyneuropathy (FAP) TTRVal30Met is a lethal autosomal dominant sensorimotor and autonomic neuropathy due to a substitution of methionine for valine at position 30 of the transthyretin (TTR) gene.
Familial amyloidosis or familial amyloid polyneuropathy (FAP) TTRV30M is a hereditary disease presented, in most cases, as a sensorimotor and autonomic neuropathy.
The highly amyloidogenic human TTR variant in which leucine at position 55 is replaced by proline (L55PTTR) is responsible for aggressive fatal amyloidosis with peripheral and autonomic neuropathy, cardiomyopathy and nephropathy.
Familial amyloid polyneuropathy (FAP) type I is caused by a mutated transthyretin (TTRV30M) and characterized by a sensorimotor and autonomic neuropathy.
We report a 40-year-old woman with a new transthyretin (TTR) variant, glutamine replacing leucine at residue 55 (Leu55Gln), who showed progressive somatic and autonomic neuropathy, glaucoma, and vitreous opacities.
Progressive peripheral and autonomic neuropathy are associated with neural and visceral deposition of amyloid, derived most commonly from the Met-30 variant of the plasma protein transthyretin.