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Journals and Conferences
The C5b-9 complex has a dual role as a factor involved in the initiation of nephritides and in the progress to chronicity and sclerosis. The unique pathophysiology of the membrane attack complex, distinct from other mediators, is its independence from specific receptors. It inserted in any membrane lipid bilayer tested so far.
C5b-9 membrane attack complexes of complement (MAC) stimulate the production of type IV collagen in cultures of human glomerular epithelial cells. Together with other known effects of MAC interaction with glomerular cells, the complex is ascribed a role in the progress of acute glomerulitis into the chronic nephritic state.
Exposure of human glomerular mesangial cells (GMC) in culture to sublytic doses of the terminal complement proteins C5b-8 and C5b-9 caused a transient increase in abundance of mRNA specific for collagen type IV and fibronectin; mRNA of laminin was not affected. Since C5b-9 is found deposited in inflamed or sclerotic areas we propose that stimulation of… (More)
Exposure of cultured human glomerular mesangial cells (GMC) to normal human serum and an activator of the complement system results in rapid uptake of the terminal complement proteins C5b-9 by the cells. This 'innocent bystander' complement attack, however, does not result in cell killing, but in the stimulation of the GMC to release prostaglandin E (PGE),… (More)
The subepidermal blistering skin disease bullous pemphigoid is associated with the deposition of specific autoantibodies and activated complement at the epidermal basement membrane zone of lesional skin. Subepidermal blistering is thought to depend on proteolytic enzymes, in particular on plasmin. A possible interrelation is proposed between the initiating… (More)
T h e phenomenology of the complement system was quite extensively worked out by the early IY4Os when the four classical complement components. C'l, C'4. C'3 and C'2, had been described as had the 'anlage' of the observations that there were multiple pathways of activation. In the lY6Os, the complement components were purified as proteins and as antigens. T… (More)
Aside from their lytic function the late complement components C5b-9 stimulate release of prostanoids, interleukin 1 and oxygen radicals from a number of cells. Since C5b-9 has also been connected to the development of sclerosis in animal models of glomerulonephritis, we addressed the question whether C5b-9 would affect the collagen synthesis. We used human… (More)
Incubation of cultured rat glomerular epithelial cells (GEC) with sublytic amounts of the purified complement components C5b6, C7, C8 and C9 greatly stimulated the release of the prostanoids prostaglandin E (PGE) and thromboxane B2. Incubation of GEC with C5b-8 was also stimulatory, whereas omission of C7 abolished the enhanced prostanoid production. These… (More)