Objective:To observe autophagy in human peripheral blood T lymphocyte.Methods:Peripheral blood T lymphocytes of healthy adults were separated with Percoll(1.073 g/ml) and harvested by using nylon column. The cultured cells were divided into control and dexamethasone(DXM) group, and cell morphology was observed through light microscope, electron microscope and fluorescent microscope at 0 and 72 h. And incidence rate of autophagy was analyzed by flow cytometry.Results:①The natural cultured T lymphocytes showed typical morphology of autophagy. ②There was significant statistic difference between 0 and 72 h incidence rate of autophagic T lymphocyte in both control and DXM group. ③There was significant statistic difference in 72 h incidence rate of autophagic T lymphocyte between control and DXM group.Conclusion:Autophagy can be seen in human peripheral blood T lymphocytes, and DXM could induce autophagy.

Objective To investigate the clinical significance of piatelet activity in patients with chronic cor Dulmonale.Methods PAC-1 and CD62p was measured with flow cytometry in whole blood samples from 40 patients and 30 normal controls.The pulmonary arterial pressure was detected through Doppler echocardiography.The arterial partial pressure of oxygen and the carbon dioxide were also analyzed.Results PAC-1 and CD62p increased significantiy (P<0.01).Conclusion Platelet activity is positively related to pulmonary artrial systolic pressure,CO2 partial pressure,and negatively related to O2 partial pressure.