[Effects of low temperature exposure on dermal microvascular endothelial cells function].
Zhongguo Ying Yong Sheng Li Xue Za Zhi
; 29(4): 301-4, 2013 Jul.
Article
en Zh
| MEDLINE
| ID: mdl-24175547
ABSTRACT
OBJECTIVE:
To explore the damage effects and expression of vascular endothelial growth factor (VEGF) exposed with different low-temperatures on rat dermal microvascular endothelial cells (DMVECs).METHODS:
Primary DMVECs were obtained by discontinuous Percoll gradient centrifugation. The DMVECs were identified by phase contrast microscope and immunofluorescence studies for CD31 antigen. Applied 28 degrees C, 12 degrees C and 0 degrees C to interfere with rat DMVECs as cold-exposure model. The changes of cells morphology were observed under invert microscope. The membrane integrity was determined by lactate dehydrogenase (LDH) activity. RT-PCR was used to examine the expression of vascular endothelial growth factor mRNA in cells.RESULTS:
The monolayer of cultured PMVECs displayed the shape of pavingstone. CD31 antigen and binding BSI results by fluorescence microscope identified the cultured cells were DMVECs. After 24 h cold exposure, the cell morphology of 0 degrees C group was shrunken, the other groups were "Fibroblast-like". The LDH activity (U/L) in the medium of 28 degrees C, 12 degrees C and 0 degrees C groups was 54.17 +/- 3.02, 64.66 +/- 3.03, 82.13 +/- 10.91 respectively, which was significantly higher than that of 37 degrees C group (12.23 +/- 3.0, P < 0.01). The VEGF mRNA expression level was up-regulated in 28 degrees C group and 12 degrees C group versus control group (P < 0.05), but unchanged in 0 degrees C group.CONCLUSION:
The rat DMVECs injury severity are deteriorated with temperature decreasing, and VEGF might be involved in the regulation of membrane permeability in this period.
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Base de datos:
MEDLINE
Asunto principal:
Endotelio Vascular
/
Frío
/
Células Endoteliales
/
Factor A de Crecimiento Endotelial Vascular
Tipo de estudio:
Prognostic_studies
Idioma:
Zh
Revista:
Zhongguo Ying Yong Sheng Li Xue Za Zhi
Asunto de la revista:
FISIOLOGIA
Año:
2013
Tipo del documento:
Article