ABSTRACT
Objective:To investigate the effects of thyroxine (T 4) and propylthiouracil (PTU) on nitric oxide synthase expression in human umbilical vein endothelial cells (HUVEC cells). Methods:HUVEC cells were cultured in vitro, the experiment was divided into 6 groups: control (without T 4 and PTU), 10 -9, 10 -7, 10 -4 mol/L T 4, PTU (5 μg/ml PTU), and 10 -4 mol/L T 4 + PTU, the action time was 24 h. CCK-8 method was used to detect cell activity; nitrate reductase method was used to detect nitric oxide (NO), total nitric oxide synthase (TNOS) and endothelial nitric oxide synthase (eNOS) contents; Western blotting was used to detect eNOS protein expression level. Results:The differences of cell survival rates [(100.00 ± 0.00)%, (96.73 ± 1.17)%, (86.20 ± 7.54)%, (47.37 ± 9.10)%, (53.37 ± 5.47)%, (53.40 ± 8.84)%] among the 6 groups were statistically significant ( F = 29.42, P < 0.05). Compared with the control group, the cell survival rates of 10 -7, 10 -4 mol/L T 4, PTU, and 10 -4 mol/L T 4 + PTU groups were significantly reduced ( P < 0.05). There were statistically significant differences in the contents of NO and TNOS among the 6 groups ( F = 3.93, 3.46, P < 0.05). Compared with the control group, the TNOS content in PTU group was significantly reduced ( P < 0.05); compared with the 10 -4 mol/L T 4 group, the NO contents in PTU and 10 -4 mol/L T 4 + PTU groups were significantly reduced ( P < 0.05). There were no significant differences in eNOS content and protein expression level among the 6 groups ( F = 0.24, 0.17, P > 0.05). Conclusions:High concentration of T 4 can cause damage to the activity of HUVEC cells cultured in vitro, and PTU can alleviate it by regulating NO and TNOS. The specific mechanism of action still needs to be further studied in molecular biological experiments.
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Objective To observe the relationship between hyperthyroidism and vascular endothelial injury.Methods From 2016 to 2017,data of 60 patients with simple hyperthyroidism,autoimmune thyroid disease,cardiovascular and cerebrovascular diseases were collected from the Second Affiliated Hospital of Harbin Medical University.And 60 healthy subjects were enrolled in the same period as a healthycontrol group.The enzyme-linked immunosorbent assay (ELISA) was used to detect the content of vascular endothelial injury markers (vWF),thrombomodulin (TM),endothelin-1 (ET-1),P-selectin in serum of all subjects,as well as the serum thyroid stimulating hormone (TSH),free triiodothyronine (FT3),free thyroxine (FT4),anti-thyroglobulin antibody (TgAb),and anti-thyroid peroxidase antibody (TPOAb) in patients with cardiovascular and cerebrovascular diseases levels.The correlation analysis of vascular endothelial injury in the simple hyperthyroidism group,autoimmune thyroid disease group,cardiovascular and cerebrovascular diseases group and healthy control group was conducted.Results There were statistically significant differences between the he althy control group,the simple hyperthyroidism group,the autoimmune thyroid disease group and the cardiovascular and cerebrovascular diseases group in the serum levels of vWF,TM,ET-1 and P-selectin,respectively (F =6.56,9.19,7.88,12.45,P ＜ 0.05),and the simple hyperthyroidism group,autoimmune thyroid disease group,cardiovascular and cerebrovascular diseases group were significantly higher than the healthy control group (P ＜ 0.05).Correlation analysis showed that the vascular endothelial injury in the patients with simple hyperthyroidism,autoimmune thyroid disease,and cardiovascular and cerebrovascular diseases groups was statistically significantly different compared with the healthy control group,respectively (x2 =5.08,5.08,8.16,P ＜ 0.05);the risk of vascular endothelial injury in each diseased group was 2.37,2.37,and 3.07 times higher than that of the healthy control group,respectively.The abnormal rates of TSH,FT3,FT4,TgAb and TPOAb in patients with cardiovascular and cerebrovascular diseases were 18.33％ (11/60),15.00％ (9/60),15.00％ (9/60),10.00％ (6/60) and 11.7％ (7/60),respectively.Conclusion Simple hyperthyroidism and autoimmune thyroid disease are risk factors of vascular endothelial injury.
ABSTRACT
Objective@#To observe the relationship between hyperthyroidism and vascular endothelial injury.@*Methods@#From 2016 to 2017, data of 60 patients with simple hyperthyroidism, autoimmune thyroid disease, cardiovascular and cerebrovascular diseases were collected from the Second Affiliated Hospital of Harbin Medical University. And 60 healthy subjects were enrolled in the same period as a healthycontrol group. The enzyme-linked immunosorbent assay (ELISA) was used to detect the content of vascular endothelial injury markers (vWF), thrombomodulin (TM), endothelin-1 (ET-1), P-selectin in serum of all subjects, as well as the serum thyroid stimulating hormone (TSH), free triiodothyronine (FT3), free thyroxine (FT4), anti-thyroglobulin antibody (TgAb), and anti-thyroid peroxidase antibody (TPOAb) in patients with cardiovascular and cerebrovascular diseases levels. The correlation analysis of vascular endothelial injury in the simple hyperthyroidism group, autoimmune thyroid disease group, cardiovascular and cerebrovascular diseases group and healthy control group was conducted.@*Results@#There were statistically significant differences between the healthy control group, the simple hyperthyroidism group, the autoimmune thyroid disease group and the cardiovascular and cerebrovascular diseases group in the serum levels of vWF, TM, ET-1 and P-selectin, respectively(F = 6.56, 9.19, 7.88, 12.45, P < 0.05), and the simple hyperthyroidism group, autoimmune thyroid disease group, cardiovascular and cerebrovascular diseases group were significantly higher than the healthy control group (P < 0.05). Correlation analysis showed that the vascular endothelial injury in the patients with simple hyperthyroidism, autoimmune thyroid disease, and cardiovascular and cerebrovascular diseases groups was statistically significantly different compared with the healthy control group, respectively(χ2 = 5.08, 5.08, 8.16, P < 0.05); the risk of vascular endothelial injury in each diseased group was 2.37, 2.37, and 3.07 times higher than that of the healthy control group, respectively. The abnormal rates of TSH, FT3, FT4, TgAb and TPOAb in patients with cardiovascular and cerebrovascular diseases were 18.33% (11/60), 15.00% (9/60), 15.00% (9/60), 10.00% (6/60) and 11.7% (7/60), respectively.@*Conclusion@#Simple hyperthyroidism and autoimmune thyroid disease are risk factors of vascular endothelial injury.