Analysis of the indicators of frequent exacerbation of chronic obstructive pulmonary disease / 中华疾病控制杂志

@# Objective To investigate the relationship between multiple blood indexes and frequent exacerbation of chronic obstructive pulmonary disease (COPD). Methods 102 patients with COPD were selected and divided into frequent exacerbation group (≥ 2 times/year, 55 patients) and infrequent exacerbation group (< 2 times/year, 47patients), according to the frequency of acute exacerbation in one year. The relationship between multiple indicators in blood routine and blood gas analysis and frequent exacerbation of COPD was explored by independent sample t test, 2 test, and multiple Logistic regression analysis. A retrospective study was conducted. Results Neutrophils count (NEU), neutrophils ratio (Neut%), and neutrophil-to-lymphocyte ratio (NLR) of frequent exacerbation group were significantly higher than those of infrequent exacerbation group, while lymphocytes (LY), lymphocytes ratio (LY%) were lower (All P<0.05). OR(95% CI) of NLR was 3.483(1.170-10.373)，and OR(95% CI) of partial pressure of carbon dioxide in artery (PaCO2) was 1.124(1.053-1.201).NLR and PaCO2 were risk factors for frequent exacerbation of COPD. Increase of NLR and PaCO2 led to an increasing risk of frequent exacerbation of COPD ( All P<0.05). Conclusions The levels of NLR and PaCO2 in COPD patients with frequent exacerbation are higher than those in patients with infrequent exacerbation. As a consequent, NLR and PaCO2 could be considered risk factors for frequent exacerbation of COPD.

Protective effects of angiotensin Ⅱ receptors antagonist on the LPS-induced lung acute injury / 中华急诊医学杂志

Objective To investigate the effects of angiotensinⅡ(AngⅡ) receptors antagonist on the LPS-induced acute lung injury (ALl).Method Wistar rats were randomly divided into three groups:control group;in LPS group,mrs were treated with LPS (10 mg/kg) at 3,6,12,and 24 hours;in LPS+ AngⅡreceptors antagonist group,pre-expasure to AngⅡreceptors antagonist [Sar~1,Ile~8] AngⅡfor 30 minutes before treated with LPS (10 mg/kg) for 6 hours.All the rats were killed,and the lung tissue was collected.Results Compared with control group pulmonary wet/dry weight ratio was significantly higher in the other two groups (P

Effect of S-2-(3-aminopropylamino) ethyl phosphorothioic acid on apoptosis and proliferation inhibition of HL-60 cell line / 中国实验血液学杂志

To study the effects of S-2-(3-aminopropylamino) ethyl phosphorothioic acid (WR-2721, amifostine) on proliferation inhibition and apoptosis of HL-60 human leukemia cell line, the cell apoptosis rate of HL-60 was determined by annexin V/PI double staining method. Cell proliferation and chemotherapy sensitivity were analyzed with XTT assay, and the changes of cell cycle were observed through flow cytometry. The results showed that WR-2721 could significantly inhibit HL-60 cell proliferation. After treatment (30 min, 37 degrees C) with WR-2721, the sensitivity of HL-60 cells to VP16 was enhanced, and the IC(50) descended from 52.5 micro g/ml to 40.5 microg/ml. After 72 hours treatment of HL-60 cells with WR-2721, the early apoptotic cells (annexin V-FITC positive/PI negative) were increased from (5.5 +/- 1.9)% to (48.5 +/- 8.4)% (P < 0.001), late apoptotic cells (annexin V-FITC positive/PI positive) were increased from (1.2 +/- 0.5)% to (39.0 +/- 4.0)% (P < 0.001), and HL-60 cells were arrested in G(2)-M phase. In conclusion, WR-2721 treatment can enhance HL-60 cell chemotherapy sensitivity to VP16, inhibit proliferation, induce apoptosis and accumulation of cells in G(2)-M phase.