ABSTRACT
<p><b>OBJECTIVE</b>Autoimmunity participates in chronic heart failure (CCI), it is CD4+ T lymphocytes that mainly induces myocardial infiltration and the progression of the disease. The purpose of this research is to assess changes of CD4+, CD8+ T lymphocyte subset, and phenotype of primary T cell (CD4+ CD45RA+) and memory T cells (CD4+ CD45RO+) in peripheral blood in aged male patients with CCI. And to investigate the immunomodulatory effects on subsets of CD4+, CD8+ and phenotype of CD4+ CD45RA+ and CD4+ CD45RO+ and the possible therapeutic mechanism.</p><p><b>METHODS</b>The participant were 155 aged men among whom 94 cases were diagnosed as CCI and heart function of the rest 41 cases were normal. All patients underwent echocardiography examination and were collected peripheral blood before and after treatment. Serum N terminal pro-brain natriuretic peptide (NT-proBNP) levels were detected by heterogeneous immunoassay. Serum C reactive protein (CRP) were measured by immunoturbidimetry assay. T lymphocytes in peripheral blood were separated and determined distribution of CD4+, CD8+, CD4+ CD45RA+, CD4+ CD45RO+ using flow cytometry. Participants were divided into 3 groups: the CCI intervention group, who received regular therapy and thymopentin (20 mg intramuscular injection, once every other day for 3 month; n = 60) , the CCI control group, who received regular therapy (n = 54) and 41 healthy individual older than 57 years of age, who served as normal controls.</p><p><b>RESULTS</b>Compared with the control group, left ventricular ejection fraction (LVEF) and CD4+ CD45RO+ levels decreased, left ventricular end diastolic diameter (LVEDD), NT-proBNP, CRP, CD4+, CD4+ CD45RA+, CD4+/CD8+, CD4+ CD45RA+/CD4+ CD45RO+ levels were obviously higher in CCI group. Distribution of CD8+ was not significantly changed. The level of NT-proBNP, CRP, CD4+/CD8+, CD4+ CD45RA+/CD4+ CD45 RO+ was negatively correlated with LVEF. LVEF could be much improved via decreasing distribution of CD4+/CD8+, CD4+ CD45RA+/CD4+ CD45RO in CCI intervention group than in CCI control group.</p><p><b>CONCLUSION</b>The changes of CD4+/CD8+ and CD4+ CD45RA+/CD4+ CD45RO+ suggest that CD4+ T lymphocyte subset and its phenotype play an important role in the process of CCI. The regulation of CD4+ T lymphocyte and its phenotype may be one of the strategy in the treatment of CCI.</p>
Subject(s)
Aged , Aged, 80 and over , Humans , Male , CD4-CD8 Ratio , CD4-Positive T-Lymphocytes , CD8-Positive T-Lymphocytes , Heart Failure , Blood , Allergy and Immunology , Immunomodulation , Leukocyte Common Antigens , Allergy and Immunology , Phenotype , T-Lymphocyte Subsets , Allergy and ImmunologyABSTRACT
Objective: To investigate the mechanism of liver and lung injury in mouse septic models. [Methods: Twenty-four male Kunming mice were subjected to cecal ligation and puncture (CLP) or sham operation. The permeability of microvasculature, water contents, activities of myeloperoxidase (MPO) and the apoptosis of microvascular endothelial cells in lung microvasculature and liver sinus were examined 3 h and 12 h after operation. Results: Both the liver and lung showed a significant increase in microvessel permeability at 12 h in CLP group compared with sham operation group. MPO activity and water content in CLP group were obviously higher than those in the sham operation group. The apoptosis of lung microvascular endothelial cells at 12 h in CLP group (5.03 ± 0.92)% was significantly higher than that of control group (3.48 ± 1.21)% (P< 0.01). Conclusion: Sepsis can lead to severe injury to the liver and lung. Apoptosis in lung microvascular endothelial cells might cause alteration of microvascular permeability, finally resulting in the injury of lung.
ABSTRACT
Objective:To investigate the mechanism of liver and lung injury in mouse septic models.Methods:Twenty-four male Kunming mice were subjected to cecal ligation and puncture(CLP)or sham operation.The permeability of microvasculature,water contents,activities of myeloperoxidase(MPO)and the apoptosis of microvascular endothelial cells in lung microvasculature and liver sinus were examined 3 h and 12 h after operation.Results:Both the liver and lung showed a significant increase in microvessel permeability at 12 h in CLP group compared with sham operation group.MPO activity and water content in CLP group were obviously higher than those in the sham operation group.The apoptosis of lung microvascular endothelial cells at 12 h in CLP group(5.03?0.92)% was significantly higher than that of control group(3.48?1.21)%(P