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The chemotactic activity of normal and complement-activated serum as measured by the leading-front method using a Boyden chamber.

Abstract：

:The chemotactic activity in serum, defined as the attractant effect of serum on the migration of neutrophil granulocytes (PMN) has been investigated for the purpose of characterizing the major chemotactic factors in serum as measured by the leading-front technique, using a modified Boyden chamber. The chemotactic activity was measured in fresh and heated normal and activated serum and in serum fractions thereof separated by gel filtration. By gel filtration on Sephacryl S-200 a partly heat-labile C3-C5-associated chemotactic factor with molecular weight between 70,000 and 150,000 was isolated from fresh normal serum. The heat-labile chemotactic activity was destroyed by pronounced complement activation. Gel filtration of complement-activated serum on a Sephacryl S-200 column showed the existence of one C5-associated chemotactic factor with approximately 70,000 molecular weight and one unidentified factor with approximately 150,000 molecular weight, whereas no low molecular weight chemotactic activity was demonstrated. On the other hand, gel filtration of activated serum on a Sephadex G-75 column demonstrated one C5-associated chemotactic factor of approximately 70,000 molecular weight and one 10,000-50,000 molecular weight factor active only in the presence of 2% normal serum. This investigation suggests that the chemotactic activity in fresh normal serum is mediated by a partly heat-labile C3-C5-associated complex. In activated serum three chemotactic factors were demonstrated, one unidentified factor with 150,000 mol wt and two C5-dependent factors with 70,000 and 10,000-50,000 mol wt, the latter probably corresponding to C5a desarg. Accordingly, this study also suggests that C5a is not the only chemotactic factor generated in serum.

journal_name

Scand J Immunol

journal_title

Scandinavian journal of immunology

authors

Håkansson L,Venge P

doi

10.1111/j.1365-3083.1984.tb00900.x

subject

Has Abstract

pub_date

1984-01-01 00:00:00

pages

63-73

issue

1

eissn

0300-9475

issn

1365-3083

journal_volume

19

pub_type

杂志文章

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