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Characterization of the response of human bone marrow endothelial cells to in vitro irradiation
Author(s) -
Gaugler MarieHélène,
Squiban Claire,
Claraz Marie,
Schweitzer Karin,
Weksler Babette,
Gourmelon Patrick,
Van der Meeren Anne
Publication year - 1998
Publication title -
british journal of haematology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.907
H-Index - 186
eISSN - 1365-2141
pISSN - 0007-1048
DOI - 10.1046/j.1365-2141.1998.01119.x
Subject(s) - in vitro , human bone , bone marrow , irradiation , characterization (materials science) , chemistry , pathology , medicine , biology , cancer research , immunology , materials science , biochemistry , nanotechnology , physics , nuclear physics
Endothelial cell dysfunction is a classic consequence of radiation damage. Bone marrow endothelial cells (BMEC) are a critical component of the stroma in the regulation of haemopoiesis. In animal models, radiation‐induced injury of BMEC has been described and a role for BMEC in haemopoietic regeneration after irradiation has been suggested. However, functions of BMEC involved in the haemopoietic regeneration have not been assessed. Therefore we studied the functional response of human BMEC to irradiation using the transformed human BMEC line (TrHBMEC) irradiated with 2, 5 or 10 Gy. Our results showed a time‐ and a dose‐dependent increase in damage to irradiated TrHBMEC measured by a decreased number of adherent cells which correlated with increased apoptosis and augmented release of soluble ICAM‐1 and von Willebrand factor. 2 Gy irradiated TrHBMEC expressed more ICAM‐1 on their surface than non‐irradiated cells, whereas no change in VCAM‐1, E‐selectin and PECAM‐1 expression was observed. An increased production of G‐CSF, GM‐CSF, IL‐8, IL‐6, IL‐1α, IL‐11, MIP‐1α and SCF and no production of LIF, TNF‐α, TPO and IL‐3 by 2 Gy irradiated TrHBMEC was observed. The haemopoietic supportive function of TrHBMEC was not altered after a 2 Gy exposure. These results suggest that although radiation induces endothelial cell damage, irradiated cells still support the proliferation and the differentiation of CD34 + haemopoietic cells.