CD226 monoclonal antibody induces variation of intracytosolic free calcium level in human umbilical vein endothelial cells.
- Author:
Li-Hua CHEN
1
;
Xue-Song LIU
;
Fei LIU
;
Bo-Quan JIN
Author Information
1. Department of Immunology, Fourth Military Medical University, Xi'an 710032.
- Publication Type:Journal Article
- MeSH:
Antibodies, Monoclonal;
pharmacology;
Antigens, Differentiation, T-Lymphocyte;
immunology;
Calcium;
metabolism;
Cells, Cultured;
Human Umbilical Vein Endothelial Cells;
metabolism;
physiology;
Humans
- From:
Acta Physiologica Sinica
2003;55(3):355-359
- CountryChina
- Language:Chinese
-
Abstract:
In order to study the possible mechanism of CD226 monoclonal antibody (mAb)-mediated intracellular message transduction in human umbilical vein endothelial cells (HUVECs), the influence of CD226 mAb and its cross-linking by secondary antibody (II Ab) on the concentration changes in [Ca(2+)](i) in the HUVECs under different conditions were determined by confocal laser scanning microscopy. The main results are as follows. (1) When the culture medium was balanced by Hanks Buffer, [Ca(2+)](i) in HUVECs increased slowly after stimulation by CD226 mAb, whereas [Ca(2+)](i) increase was accompanied by [Ca(2+)](o) decrease after the mAb was cross-linked by goat anti-mouse IgG. Then [Ca(2+)](i) and [Ca(2+)](o) all returned to the normal level. (2) When the culture medium was balanced by D-Hanks buffer, [Ca(2+)](i) in HUVECs showed little variation when the cells were stimulated by CD226 mAb, but [Ca(2+)](i) decreased markedly after cross-linking. (3) When HUVECs were pretreated with EGTA, there was no variation in [Ca(2+)](i) of HUVECs after CD226 mAb stimulation alone or cross-linking of the mAb. Our results suggest that stimulation by CD226 mAb and cross-linking by goat anti-mouse IgG induce the variation of [Ca(2+)](i) in HUVECs under different conditions and the variation of [Ca(2+)](i) in HUVECs may play an important role in many physiological and pathological processes.
