Novel synthetic peptide, lung surfactant containing the...

C - Chemistry – Metallurgy – 07 – K

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C07K 14/785 (2006.01) A61K 38/08 (2006.01) A61K 38/10 (2006.01) A61K 38/17 (2006.01) C07K 7/04 (2006.01) A61K 38/00 (2006.01)

Patent

CA 2178345

Synthetic peptides containing the following specific sequence: Xaa-Pro-Val-Xbb-Xcc-Lys-Arg-W(wherein Xaa is absent or represents Cys or Ser, Xbb represents His or Asn, Xcc represents Leu or Ile and W represents a hydrophobic peptide portion.), an intermediate for producing the peptide, a process for producing the peptide, a lung surfactant comprising the peptide and a lipid mixture and a remedy for respiratory distress syndrome containing the surfactant as the active ingredient. The peptide is easy to isolate and purify and suitable for mass production. As it is highly soluble in methanol and the like, it can readily be blended with a lipid mixture and is suited for the preparation of a lung surfactant. As the lung surfactant has a good supensibility and a potent surface activity, it is useful as a remedy for respiratory distress syndrome.

Peptide synthétique contenant la séquence suivante: Xaa-Pro-Val-Xbb-Xcc-Lys-Arg-W, (où Xaa est absent ou représente Cys ou Ser; Xbb représente His ou Asn; Xcc représente Leu ou Ile; W représente une partie de peptide hydrophobe); intermédiaire servant à préparer le peptide; procédé de préparation du peptide; tensioactif pulmonaire composé du peptide et d'un mélange lipidique; remède contre le syndrome de souffrance respiratoire contenant le tensioactif en tant qu'ingrédient actif. Ce peptide est facile à isoler et à purifier et peut être produit en quantités importantes. Etant donné qu'il est extrêmement soluble dans un méthanol ou dans un produit analogue, on peut le combiner sans difficultés à un mélange lipidique et il est approprié pour la préparation d'un tensioactif pulmonaire. Ce dernier peut être mis en suspension sans problèmes et possède une activité de surface puissante; de ce fait, il est efficace en tant que remède contre le syndrome de souffrance respiratoire.

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