ObjectiveTo investigate the clinical characteristics and prognostic factors of influenza pneumonia from 2014 to early 2018.MethodsThe general information, clinical symptoms, laboratory examination and treatment of 69 patients with influenza pneumonia from October 2014 to March 2018 were collected. The clinical characteristics of 32 patients with influenza pneumonia from 2017 to 2018 were compared with 37 patients with influenza pneumonia from 2014 to 2016. The prognostic factors of influenza pneumonia were also investigated.ResultsThe median patient age was 68 (55-78) years, and 41 cases (59.4%) were men in 69 patients. The five most common comorbidities were hypertension (44.9%), diabetes (23.3%), chronic obstructive pulmonary disease (17.4%), coronary atherosclerotic heart disease (13.0%), and chronic kidney disease (10.1%). The median levels of fasting blood glucose, lactate dehydrogenase, C-reactive protein, and procalcitonin in the patients with influenza pneumonia in 2017-2018 were significantly higher than those in the same period of 2014-2016, which were respectively 7.1 (5.4 - 8.3)mmol/L vs. 5.2 (4.5 - 7.3)mmol/L (P=0.017), 213.0 (98.0 - 320.5)U/L vs. 178 (98.0 - 280.0)U/L (P=0.049), 65.5 (15.4 - 139.8)mg/L vs. 45.5 (14.1 - 75.3)mg/L (P=0.050), 0.66 (0.24 - 1.58)μg/L vs. 0.17 (0.11 - 0.43)μg/L (P=0.004). The proportion of bacterial infection, septic shock, acute renal failure and mortality in the patients with influenza pneumonia in 2017-2018 was higher than that in the 2014-2016 group, which were respectively 40.6% vs. 18.9% (P=0.047), 21.9% vs. 5.4% (P=0.043), 21.9% vs. 2.7% (P=0.035), 31.3% vs. 5.4% (P=0.005). Multivariate analysis showed that numbers of lymphocytes, blood urea nitrogen, and procalcitonin were independent risk factors for mortality in the patients with influenza pneumonia. The odds ratio was respectively 0.001 (95%CI 0.00 - 0.200), 1.342 (95%CI 0.996 - 1.808), 1.113. (95%CI 1.006 - 1.230).ConclusionsCompared with the patients with influenza pneumonia in 2014-2016, the patients in 2017-2018 have higher levels of fasting blood glucose and lactate dehydrogenase, and are also susceptible to secondary bacterial infection, septic shock, and acute renal failure. Decreased lymphocytes, elevated blood urea nitrogen, and elevated procalcitonin are independent risk factors for death in patients with influenza pneumonia.
目的 通過檢測異染色質蛋白1α（HP1α）在DNA損傷后的磷酸化狀況，介紹一種用磷酸化標簽(phos-tag)試劑檢測磷酸化蛋白質的新方法。 方法 取雄雌C57小鼠交配后孕13.5 d胚胎，分離并原代培養小鼠胚胎成纖維細胞。對照組及實驗組(6個損傷時間點)各取2個100 mm培養皿的細胞進行實驗，實驗組細胞用喜樹堿進行DNA損傷；對照組用等量的二甲基亞砜處理。用摻入phos-tag的十二烷基硫酸鈉-聚丙烯酰胺凝膠電泳分離蛋白并轉印，將膜用抗HP1α的抗體孵育，用偶聯辣根過氧化物酶的抗體做二抗，通過成像系統檢測蛋白。 結果 實驗組存在一條與HP1α有明顯不同遷移率的磷酸化HP1α條帶，與對照組相比DNA損傷后磷酸化HP1α含量一過性增多。 結論 HP1α被DNA損傷誘導為磷酸化狀態，提示其可能在DNA修復過程中扮演重要角色。 Phos-tag 蛋白質印跡法可采用普通抗體檢測磷酸化的蛋白，是一種簡便易行的檢測未知磷酸化蛋白質的新方法。