scholarly journals Structures of the asparagine-linked oligosaccharides of guinea-pig factor B of the alternative complement pathway

1990 ◽  
Vol 272 (2) ◽  
pp. 533-535 ◽  
Author(s):  
T Mizuochi ◽  
J Hamako ◽  
K Titani ◽  
M Matsushita ◽  
H Okada
Keyword(s):  
Guinea Pig ◽  
Column Chromatography ◽  
Paper Electrophoresis ◽  
Alternative Complement Pathway ◽  
Complement Pathway ◽  
Methylation Analysis ◽  
Complex Type ◽  
Factor B ◽  
Alternative Complement

This paper describes the structures of the asparagine-linked oligosaccharides of two forms of guinea-pig Factor B of the alternative complement pathway with different Mr values. Oligosaccharides were quantitatively liberated from both glycoproteins by hydrazinolysis, fractionated by paper electrophoresis and Bio-Gel P-4 column chromatography, and their structures determined by sequential exoglycosidase digestions in conjunction with methylation analysis. Both glycoproteins were shown to have the same biantennary complex-type oligosaccharides but it is suggested that they contain different numbers of oligosaccharide chains.

scholarly journals Simple Method To Distinguish between Primary and Secondary C3 Deficiencies

2003 ◽  
Vol 10 (2) ◽  
pp. 216-220
Author(s):  
Marlene Pereira de Carvalho Florido ◽  
Patrícia Ferreira de Paula ◽  
Lourdes Isaac
Keyword(s):  
Human Serum ◽  
Complement System ◽  
Factor H ◽  
Normal Human Serum ◽  
Alternative Complement Pathway ◽  
Complement Pathway ◽  
Factor B ◽  
Alternative Complement ◽  
Normal Human ◽  
The Complement System

ABSTRACT Due to the increasing numbers of reported clinical cases of complement deficiency in medical centers, clinicians are now more aware of the role of the complement system in the protection against infections caused by microorganisms. Therefore, clinical laboratories are now prepared to perform a number of diagnostic tests of the complement system other than the standard 50% hemolytic component assay. Deficiencies of alternative complement pathway proteins are related to severe and recurrent infections; and the application of easy, reliable, and low-cost methods for their detection and distinction are always welcome, notably in developing countries. When activation of the alternative complement pathway is evaluated in hemolytic agarose plates, some but not all human sera cross-react to form a late linear lysis. Since the formation of this linear lysis is dependent on C3 and factor B, it is possible to use late linear lysis to routinely screen for the presence of deficiencies of alternative human complement pathway proteins such as factor B. Furthermore, since linear lysis is observed between normal human serum and primary C3-deficient serum but not between normal human serum and secondary C3-deficient serum caused by the lack of factor H or factor I, this assay may also be used to discriminate between primary and secondary C3 deficiencies.

scholarly journals Modulation of Renal Disease in MRL/lpr Mice Genetically Deficient in the Alternative Complement Pathway Factor B

2000 ◽  
Vol 164 (2) ◽  
pp. 786-794 ◽  
Author(s):  
Hiroshi Watanabe ◽  
Gérard Garnier ◽  
Antonella Circolo ◽  
Rick A. Wetsel ◽  
Phil Ruiz ◽  
...  
Keyword(s):  
Renal Disease ◽  
Alternative Complement Pathway ◽  
Complement Pathway ◽  
Factor B ◽  
Alternative Complement
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