The dynamic changes of serum tumor necrosis factor-α and the clinical significance in acute lung injury rats caused by mechanical trauma

Objective To determine the dynamic changes and mechanism of tumor necrosis factor-α(TNF-α) in serum in acute lung injury(ALI) induced by mechanical trauma in mechanical trauma rat model. Methods Totally 40 male Wistar rats were randomly divided into sham group and trauma group, sham-acute lung injury group and acute lung injury group. Noble-Collip drum was used to establish mechanical trauma rat model. Intraperitoneal injection of TNF-α established acute lung injury model. All rats after modeling of abdominal aortic blood sampling time points were killed and the serum levels of TNF-α were asasyed by ELISA. Results Serum TNF-α levels (334. 78 ±± 28) ng/L in the trauma group were significantly higher than those in the sham group( 177 ±10 ) ng/L (P ＜0. 01 ). The pathological results showed that both in trauma group and acute lung injury group lung infection were very obvious, while it was basically normal in both sham group and sham-acute lung injury group. Conclusions Serum TNF-αt levels of mechanical trauma may be associated with acute lung injury after mechanical trauma. Therefore, dynamic observation of the change of serum TNF-α after mechanical trauma will help the assessment and prognosis of the disease, it has important clinical significance.     

Effects of dl-praeruptorin A on nucleus factor-κB and tumor necrosis factor-α expression in ischemia-reperfusion hearts

AIM: To study the effects of dl-praeruptorin A (Pd-Ia) on nucleus factor-κB (NF-κB) activativity and tumor necrosis factor-α(TNF-α)expression in ischemia-reperfusion (I/R) myocardium. METHODS: Langendorff's isolated rat heart was subjected to a 10-min ischemia followed by a 30-min reperfusion. NF-κB activity in nucleus was analyzed by Sandwich Enzyme-Linked Immunosorbent Assay (ELISA). TNF-α level in cytoplasm was measured by     

The morphologic changes of remote-organs after acute cerebral ischemia-reperfusion injury in rats and the protective effects of rofecoxib

AIM: To observe the pathomorphologic changes of major organs in thoracic-abdominal cavity induced by acute cerebral ischemia-reperfusion injury (CIRI and explore the protective effects of rofecoxib. METHODS: The model of local cerebral ischemia-2h/reperfusion -24h was induced by reversible middle cerebral artery occlusion (MCAO in SD rats.     

Role of tumor necrosis factor and nitric oxide in the protection of N-methyl-N-(3,4-methylenedioxybenzoyl) methyl-acetamide against immunological liver injury in mice

研究了Ｎ－甲基－Ｎ－（３，４－亚甲二氧基苯甲酰）甲基－乙酰胺（ＳＹ－６４０）的保肝作用及其机理．给小鼠ｉｖ活卡介苗（ＢＣＧ）１２ｄ后再ｉｖ脂多糖（ＬＰＳ）诱导小鼠血浆一氧化氮（ＮＯ），肿瘤坏死因子（ＴＮＦ），谷丙转氨酶（ＧＰＴ），谷草转氨酶（ＧＯＴ）剧烈升高及严重的肝损伤．以ＳＹ－６４０给小鼠ｉｇ（每日一次，连续１０ｄ），显著降低ＢＣＧ＋ＬＰＳ诱导的肝损伤小鼠血浆ＧＰＴ，ＧＯＴ和ＴＮＦ水平的升高，血浆ＮＯ水平的升高更加显著，肝损伤减轻．以单甲基精氨酸抑制ＮＯ的生成，ＳＹ－６４０的上述作用被抵消．ＳＹ－６４０对正常小鼠血浆ＮＯ，ＧＰＴ，ＧＯＴ水平无影响．可见，ＳＹ－６４０的保肝作用与其升高血浆ＮＯ，降低血浆ＴＮＦ水平有关．