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Curr Opin Immunol. 1999 Feb;11(1):42-6.

C1q-binding proteins and C1q receptors.

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Division of Allergy, Department of Medicine, Harvard Medical School, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA.


Aggregated or immobilized complement C1q induces cellular responses in many different cell types. C1q-induced cellular responses may be involved in host defense and in protection against autoimmunity because C1q-deficient humans have infectious complications and a very high incidence of autoimmune disease. The search for the C1q receptor(s), which has been ongoing for 25 years, has led recently to the recognition that proteins identified as binding to C1q may be divided into two groups: C1q-binding molecules that are normally intracellular; and cell surface C1q receptors.

[Indexed for MEDLINE]

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