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A simplified method for the preparation of EAC14

R Matre, O Tönder, F Wesenberg

Journal of Immunological Methods

|January 1, 1980

Summary

Sheep erythrocytes sensitized with antibodies bound human C4 complement. These cells, designated EAC14, showed stability for storage and retained immune adherence reactivity, indicating successful complement component C4 binding.

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Area of Science:

Immunology
Complement System
Cellular Immunology

Background:

The complement system is crucial for innate and adaptive immunity.
Understanding complement component binding to antibody-sensitized cells is vital for immunological studies.
Previous research has explored complement activation pathways, but specific C4 binding dynamics require further elucidation.

Purpose of the Study:

To investigate the binding of human C4 to antibody-sensitized sheep erythrocytes.
To characterize the resulting EAC14 cells and assess their stability and reactivity.
To determine the conditions necessary for C4 binding to antibody-coated erythrocytes.

Main Methods:

Sheep erythrocytes (E) were sensitized with rabbit IgG antibodies to form EA.
EA were incubated with heat-inactivated human serum as a complement source to form EAC.
Agglutination assays, lysis assays with C4-deficient serum, and immune adherence tests were performed.

Main Results:

Sensitized erythrocytes (EA) bound human C4 when incubated with complement, forming EAC14.
EAC14 cells were agglutinated by anti-human C4 antiserum but not by anti-human C3 antiserum.
EAC14 cells demonstrated reactivity in immune adherence tests and were stable for storage for at least one week.

Conclusions:

Sheep erythrocytes sensitized with IgG antibodies can effectively bind human complement component C4.
The resulting EAC14 cells are stable and retain functional activity, suitable for further immunological assays.
This study provides a reliable method for generating and characterizing C4-bound erythrocytes for complement research.

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