Evaluation of Fc-dependent monocyte-macrophage function in bone marrow transplant recipients.

Abstract:

:Allogeneic bone marrow recipients exhibit a complex and multifactorial immunodeficiency affecting numerous effector functions for various periods of time. In order to evaluate their Fc-mediated monocyte-macrophage (MM) function we studied the clearance of IgG-coated Rh-positive erythrocytes (EA) in healthy control subjects and recipients of unmanipulated marrow. We measured the survival of radiolabeled EA prior to myeloablation and on days 0, +14, +38, +124, +368, and greater than or equal to +730 following bone marrow transplant (BMT). Simultaneously we evaluated the interaction of adherent peripheral blood monocytes (PBMs) with EA (in vitro phagocytosis and attachment). Fc-mediated function appeared normal prior to BMT despite the fact that most patients had received chemotherapy previously. We found no deficit in the Fc-dependent MM activity (in vivo and in vitro) at any time after transplantation. On the contrary we demonstrated an enhanced Fc-dependent clearance during the first month after BMT (p less than 0.001; Mann-Whitney test). These results suggest that we can expect efficient MM function to eliminate IgG-coated cells and particles in BMT recipients.

journal_name

Exp Hematol

journal_title

Experimental hematology

authors

Brochu S,Perreault C,Bélanger R

subject

Has Abstract

pub_date

1989-10-01 00:00:00

pages

948-51

issue

9

eissn

0301-472X

issn

1873-2399

journal_volume

17

pub_type

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