A research program is proposed to investigate in detail the pathogenic mechanisms underlying the Portuguese type of familial amyloidotic polyneuropathy (FAP). This investigation also aims to acquire fundamental new information on the function of transthyretin (TTR) in the nervous system. The results should be relevant for the physiology of the nervous system and provide suggestions for future therapeutic approaches to FAP. Two major projects are proposed. Project One, on the intervening factors in the mechanisms of pathogenesis of FAP, aims to explore the influence of the mutant TTR found in FAP in the etiology of the disease. Studies are proposed to produce a specific monoclonal antibody directed at the mutant TTR and to develop an accurate immunoassay to measure the levels of the mutant TTR in biological specimens. This immunoassay would then be used in a variety of clinical studies to obtain new information about the pathophysiology and pathogenesis of FAP. A large and unique population of patients and carriers of the mutant gene is available in Portugal for these studies. Other studies will aim to localize the mutant TTR in tissues, and to search for DNA polymorphisnes in or adjacent to the TTR gene associated with variations in clinical expression of FAP. The general goal of Project Two is to explore in detail the function and metabolism of TTR in the nervous system. Studies are proposed that aim to: (1) quantitate TTR in the peripheral nerve; (2) explore the distribution and metabolism of TTR in the nervous system (in particular to explore the transfer of TTR from CSF to nerve, and the tissue sites of catabolism of CSF-derived TTR); (3) search for the binding of TTR to components of peripheral nerves; and (4) search for binding of TTR to specific binding sites/receptors of intact.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Research Project (R01)
Project #
5R01NS025190-02
Application #
3410396
Study Section
Neurology C Study Section (NEUC)
Project Start
1987-09-15
Project End
1990-08-31
Budget Start
1988-09-01
Budget End
1989-08-31
Support Year
2
Fiscal Year
1988
Total Cost
Indirect Cost
Name
Portuguese National Institute of Health
Department
Type
DUNS #
City
Lisbon
State
Country
Portugal
Zip Code
Almeida, M R; Aoyama-Oishi, N; Sakaki, Y et al. (1995) Haplotype analysis of common transthyretin mutations. Hum Genet 96:350-4
Saraiva, M J; Almeida, M do R; Sherman, W et al. (1992) A new transthyretin mutation associated with amyloid cardiomyopathy. Am J Hum Genet 50:1027-30
Blaner, W S; Bonifacio, M J; Feldman, H D et al. (1991) Studies on the synthesis and secretion of transthyretin by the human hepatoma cell line Hep G2. FEBS Lett 287:193-6
Almeida, M R; Hesse, A; Steinmetz, A et al. (1991) Transthyretin Leu 68 in a form of cardiac amyloidosis. Basic Res Cardiol 86:567-71
Almeida, M R; Altland, K; Rauh, S et al. (1991) Characterization of a basic transthyretin variant--TTR Arg 102--in the German population. Biochim Biophys Acta 1097:224-6
Saraiva, M J; Almeida, M R; Alves, I L et al. (1991) Molecular analyses of an acidic transthyretin Asn 90 variant. Am J Hum Genet 48:1004-8
Almeida, M R; Alves, I L; Sakaki, Y et al. (1990) Prenatal diagnosis of familial amyloidotic polyneuropathy: evidence for an early expression of the associated transthyretin methionine 30. Hum Genet 85:623-6
Saraiva, M J; Sherman, W; Marboe, C et al. (1990) Cardiac amyloidosis: report of a patient heterozygous for the transthyretin isoleucine 122 variant. Scand J Immunol 32:341-6
Furuya, H; Nakazato, M; Saraiva, M J et al. (1989) Tetramer formation of a variant type human transthyretin (prealbumin) produced by Escherichia coli expression system. Biochem Biophys Res Commun 163:851-9
Saraiva, M J; Alves, I L; Costa, P P (1989) Simplified method for screening populations at risk for transthyretin Met30-associated familial amyloidotic polyneuropathy. Clin Chem 35:1033-5

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