The number and function of circulating endothelial progenitor cells in patients with Kawasaki disease |
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Authors: | Ming-Guo Xu Li-Na Men Chun-Yu Zhao Xia Zhao Yuan-Xiang Wang Xiang-Chun Meng Ding-Rong Shen Bao-Ying Meng Qing Zhang Tao Wang |
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Institution: | (1) The Cardiovascular Center, Shen-Zhen Children’s Hospital, No 7019, Yi Tian Rd, Fu Tian District, 518026 Shenzhen, China;(2) The Neurology Department, Shen-Zhen Children’s Hospital, No 7019, Yi Tian Rd, Fu Tian District, 518026 Shenzhen, China |
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Abstract: | Kawasaki disease (KD) is associated with coronary artery injury. Studies have shown that the endothelial progenitor cell (EPC)
participates in the process of arterial repair. Data have been reported that the number of EPC increased significantly in
the subacute phase of KD. However, until now, there are no data about the functions of EPC in KD patients. The present study
was designed to further investigate the number and functions of EPC in KD. Ten KD patients in the acute phase and ten healthy
volunteers were recruited and attributed to the KD group and control group, respectively. The circulating CD34/kinase insert
domain-containing receptor double positive cells were evaluated in the two groups using flow cytometry. In vitro assays were
used to measure the functions of EPC, including proliferation, adhesion, and migration activities. The plasma levels of nitric
oxide (NO), tumor necrosis factor-α (TNF-α), and high sensitivity C-reactive protein (hs-CRP) were also assessed in both groups.
The number of EPC in the KD group was significantly higher than that of the control group (0.021 ± 0.007% vs. 0.014 ± 0.003%,
P < 0.05). The migratory response of EPC was significantly decreased in the KD group, compared with that of the control group
(5.50 ± 1.78 vs. 3.40 ± 1.35 cells/high power field, P < 0.01). Similarly, the proliferative and adhesive activities of EPC in the KD group were also decreased (0.47 ± 0.08 vs.
0.66 ± 0.07, P < 0.01; 6.5 ± 2.12 vs. 11.2 ± 2.04 cells/high power field, P < 0.01). The plasma NO, TNF-α, and hs-CRP levels in the KD group were higher than those of the control group (54.10 ± 11.78
vs. 38.80 ± 11.10 μmol/l, P < 0.01; 48.20 ± 7.42 vs. 37.00 ± 11.12 pg/ml, P < 0.05; 87.10 ± 30.18 vs. 5.30 ± 3.37 mg/l, P < 0.01). The number of circulating EPC positively correlated with the level of NO (r = 0.92, P < 0.001), and the functions of EPC negatively correlated with the levels of TNF-α and hs-CRP, respectively. In Kawasaki disease,
the number of EPC was enhanced and the functions of EPC were attenuated. The two-way regulation of circulating EPC in KD patients
may be associated with the disorders of cytokines or messengers in KD patients. |
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