Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 1409-1414 |
| Number of pages | 6 |
| Journal | Biochemical and Biophysical Research Communications |
| Volume | 100 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jun 16 1981 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Biochemistry
- Biophysics
- Molecular Biology
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Membranolysis by the ninth component of human complement. / Tschopp, Jurg; Podack, Eckhard R.
In: Biochemical and Biophysical Research Communications, Vol. 100, No. 3, 16.06.1981, p. 1409-1414.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Membranolysis by the ninth component of human complement
AU - Tschopp, Jurg
AU - Podack, Eckhard R.
PY - 1981/6/16
Y1 - 1981/6/16
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0019831621&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0019831621&partnerID=8YFLogxK
U2 - 10.1016/0006-291X(81)91981-1
DO - 10.1016/0006-291X(81)91981-1
M3 - Article
C2 - 7271808
AN - SCOPUS:0019831621
VL - 100
SP - 1409
EP - 1414
JO - Biochemical and Biophysical Research Communications
JF - Biochemical and Biophysical Research Communications
SN - 0006-291X
IS - 3
ER -