Titre
Membranolysis by the ninth component of human complement.
Type
article
Institution
Externe
Auteur(s)
Tschopp, J.
Auteure/Auteur
Podack, E.R.
Auteure/Auteur
Liens vers les personnes
ISSN
0006-291X
Statut éditorial
Publié
Date de publication
1981
Volume
100
Numéro
3
Première page
1409
Dernière page/numéro d’article
1414
Langue
anglais
Résumé
The lytic property of isolated C9 was shown by using heat (48°C) to induce polymerization of C9, which was then exposed to egg lecithin vesicles containing carboxyfluorescein. In this environment, C9 penetrated the vesicles and released the marker. C5b-9 and C5b-8 also released carboxyfluorescein at 48°C, as did C5b-7 to a lesser extent. However, neither isolated C5b-6, C7, C8 nor albumin caused such release. At 30°C, the C9 remained in the monomeric form and could not lyse the vesicles.
C9 polymers formed at 48°C were ring-shaped with an internal diameter of approximately 100 Å and an outer diameter of approximately 180 Å. These rings of C9 polymers strikingly resembled the ultrastructures formed by the membrane attack complex of complement, viewed from the top.
Our results indicate that polymeric C9 causes the membranolysis of phospholipid vesicles and, hence, that C9 alone is a cytotoxic molecule.
C9 polymers formed at 48°C were ring-shaped with an internal diameter of approximately 100 Å and an outer diameter of approximately 180 Å. These rings of C9 polymers strikingly resembled the ultrastructures formed by the membrane attack complex of complement, viewed from the top.
Our results indicate that polymeric C9 causes the membranolysis of phospholipid vesicles and, hence, that C9 alone is a cytotoxic molecule.
PID Serval
serval:BIB_A655D8BD2F1A
PMID
Date de création
2008-01-24T14:19:29.384Z
Date de création dans IRIS
2025-05-21T00:15:05Z