Molecular forms of katacalcin, calcitonin gene-related peptide and gastrin-releasing peptide, in a human medullary thyroid carcinoma.
Cancer Res
; 48(9): 2412-6, 1988 May 01.
Article
em En
| MEDLINE
| ID: mdl-3258543
ABSTRACT
Peptides synthesized by a human medullary thyroid carcinoma were purified to homogeneity by reverse-phase high performance liquid chromatography and structurally characterized by determination of amino acid composition, amino acid sequence, and fast atom bombardment mass spectra. The katacalcin-related material in the tumor extract was heterogeneous. Katacalcin (1-21) represented the predominant molecular form but metabolites, identified as katacalcin (1-20), (1-19), (1-15) and (1-13), were also identified in high concentration. Calcitonin gene-related peptide-I was isolated from the tumor but calcitonin gene-related peptide-II was absent. A minor component of calcitonin gene-related peptide-like immunoreactivity was of higher molecular weight and may represent an incompletely processed form of the prohormone. Gastrin-releasing peptide (1-27) and gastrin-releasing peptide (18-27) (neuromedin C) were isolated from the tumor but gastrin-releasing peptide (14-27) and bombesin were absent.
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Base de dados:
MEDLINE
Assunto principal:
Fragmentos de Peptídeos
/
Peptídeos
/
Neuropeptídeos
/
Calcitonina
/
Neoplasias da Glândula Tireoide
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Carcinoma
Limite:
Adult
/
Humans
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Male
Idioma:
En
Revista:
Cancer Res
Ano de publicação:
1988
Tipo de documento:
Article