Effect of different concentrations of curcumin on inflammatory factors and endotoxin changes in lung tissues of rats with heatstroke in dry-heat environment / 医学研究生学报

Objective Thermal injury causes pulmonary edema, which may lead to acute respiratory distress syndrome, sepsis, multiorgan failure and even death. The article aimed to study the mechanism of curcumin pretreatment on inflammatory factors in lung tissues and serum endotoxin of rats with dry-heat environment.Methods A total of 50 SD rats were randomly divided into 5 groups (n=10): normal control group, dry heat control group, low concentraion group (50mg/kg curcumin pretreatment group), middle concentraion group (100mg/kg curcumin pretreatment group), and high concentration group (200mg/kg curcumin pretreatment group). Rats in normal control group and dry heat control group were given normal saline by gavage, while rats in 3 curcumin pretreatment groups were given curcumin of different concentrations (50 mg/kg, 100 mg/kg, 200 mg/kg) by gavage once a day for 7 consecutive days. At 8d, all the other 4 groups except normal control group were transferred to the climate cabin (The Simulated Climate Cabin for Special Environment of Northwest of China) with the condition of (41±0.5)℃, (10±1)% relative humidity.The rats were put in the dry-heat environment for 150min, then they were anaesthetized and sacrificed at 150min to collect the blood, lung tissues for further analysis. Observation was made on the pathological changes of lung tissues of rats in each group and the changes of inflammatory factors such as IL-1β, IL-6, TNF-α and LPS.Results Compared with dry heat control group, the concentrations of IL-1β, IL-6, TNF-α and LPS in normal control group, curcumin pretreatment groups with low concentration, middle concentration and high concentration were significantly higher(P<0.01). The concentrations of IL-1β, IL-6, TNF-α and LPS in curcumin pretreatment group with low concentration were significantly lower than those curcumin pretreatment groups with middle concentration and high concentration(P<0.05). Compared with curcumin pretreatment group with middle concentration, LPS concentration of curcumin pretreatment group with high concentration decreased significantly (P<0.01). Pearson correlation analysis showed that there was a positive correlation between the plasma of LPS and inflammatory cytokines of IL-1β, IL-6, and TNF-α in lung tissues (correlation coefficient r=0.866, r=0.900, r=0.885, P=0.000).Conclusion Curcumin inhibits bacterial endotoxin in blood, reduces the expression of inflammatory factors, and plays an important role in alleviating secondary multiple organ damage, which means curcumin pretreatment can relieve lung damage caused by heatstroke and reduce the mortality of heatstroke.

Effects of Rhodiola on the Expression of iNOS mRNA in Severe Acute Pancreatitis Associated Re- nal Injury Rats / 中国中西医结合杂志

<p><b>OBJECTIVE</b>To explore the effect of Rhodiola on the expression of iNOS mRNA in severe acute pancreatitis (SAP) associated renal injury rats.</p><p><b>METHODS</b>A total of 72 healthy rats were randomly divided into the sham-operated group (S), the SAP associated renal injury group (M), and the Rhodiola-treated group (RHO), 24 in each group. Rats in S and M groups were peritoneally injected with 10 mL/kg saline 3h before modeling, while rats in the RHO group were peritoneally injected with 10 mL/kg Rhodiola Injection 3 h before modeling. The peripheral ligament of pancreas was bluntly dissociated in rats of M and RHO groups. The head of pancreas was occlused by nontraumatic blood vessel forceps 3 h later to establish the model. Eight rats were randomly selected from each group at 12, 24, and 36 h after modeling to detect levels of serum amylase, creatinine, and blood urea nitrogen. Serum levels of interleukin 1β (IL-1β) and interleukin 10 (IL-10) were detected by enzyme-linked immunosorbent assay (ELISA). Pathological changes of the left kidney were observed under light microscope. The expression of inducible nitric oxide synthase (iNOS) mRNA in the right kidney was detected with real time polymerase chain reaction (RT-PCR).</p><p><b>RESULTS</b>Compared with the S group, serum levels of amylase, creatinine (Cr), blood urea nitrogen (BUN), IL-1β, IL-10, and iNOS mRNA expression significantly increased in the M group (P < 0.01). The function of kidney and pancreas were obviously improved in the RHO group than in the M group. Levels of IL-1β and iNOS significantly decreased, but IL-10 levels significantly increased in the RHO group with statistical difference (P < 0.05).</p><p><b>CONCLUSION</b>Rhodiola had better protective effect on SAP associated renal injury, which might be achieved through inhibiting the expression of IL-1β, stimulating the expression of IL-10, down-regulating iNOS mRNA expression, reducing the generation of oxygen free radicals and NO damage to cells, and improving hypoxia tolerance capabilities of the kidney.</p>

Role of NF-?B in hepatocyte apoptosis induced by intestinal perforations due to abdominal firearm wound / 中国现代普通外科进展

Objective: To investigate the role of NF-?B in signal transduction of hepatocyte apoptosis in liver injury. Methods: A total of 42 Chang-Bai piglets were divided into 7 groups: control group, 1, 2, 4, 8, 12, and 24 hours wound group. The model of intestinal perforations due to abdominal firearm wound was established in wound groups. Hepatic NF-?B activity was measured with immunohistochemical staining and image analysis in all groups. Hepatocyte apoptosis indexes and serum ALT levels were also determined. Results: Levels of hepatic NF-?B activity in wounded groups were significantly elevated compared with control group, and there were two peaks (1 and 8 hours group P