Objective To elucidate the molecular mechanism of sirtuin-3 (SIRT3) in regulating mitochondrial biogenesis in human renal tubular epithelial cells. Methods Cells were stimulated with different concentrations of H₂O₂ and divided into four groups: control (NC), 50 μmol/L H₂O₂, 110 μmol/L H₂O₂ and 150 μmol/L H₂O₂. SIRT3 protein expression was then measured. SIRT3 was knocked down with siRNA, and cells were further assigned to five groups: control (NC), negative-control siRNA (NCsi), SIRT3-siRNA (siSIRT3), NCsi+H₂O₂, and siSIRT3+H₂O₂. After 24 h, cellular adenosine triphosphate (ATP) and mitochondrial superoxide anion (O₂•⁻) levels were determined, together with mitochondrial expression of SIRT3, peroxisome proliferator-activated receptor γ coactivator-1α (PGC-1α), nuclear respiratory factor 1 (NRF1), mitochondrial transcription factor A (TFAM), superoxide dismutase 2 (SOD2), acetylated-SOD2 and adenosine monophosphate activated protein kinase α1 (AMPKα1). Results The 110 and 150 μmol/L H₂O₂ decreased SIRT3 protein (both P<0.05). ATP and mitochondrial O₂•⁻ did not differ between NC and NCsi groups (both P>0.05). Compared to the NCsi group, the siSIRT3 group exhibited elevated O₂•⁻ level, decreased SIRT3 protein and increased expression levels of SOD2 and acetylated SOD2 protein (all P<0.05). Compared to the NCsi group, the NCsi+H₂O₂ group exhibited decreased cellular ATP levels, elevated mitochondrial O₂•⁻ levels, and reduced protein expression levels of SIRT3, SOD2, TFAM, AMPKα1, PGC-1α and NRF1 (all P<0.05). Compared with the siSIRT3 group, the siSIRT3+H₂O₂ group showed a decrease in cellular ATP levels, an increase in mitochondrial O₂•⁻ levels, a decrease in SIRT3, SOD2, TFAM, AMPKα1, PGC-1α and NRF1 protein expression levels and a decrease in acetylated SOD2 protein expression levels (all P<0.05). Compared with the NCsi+H₂O₂ group, the siSIRT3+H₂O₂ group showed a decrease in cellular ATP levels, an increase in mitochondrial O₂•⁻ levels, a decrease in SIRT3, AMPKα1, PGC-1α and NRF1, TFAM protein expression levels, and an increase in SOD2 and acetylated SOD2 protein expression levels (all P<0.05). Conclusions SIRT3 promotes mitochondrial biogenesis in tubular epithelial cells via the AMPK/PGC-1α/NRF1/TFAM axis, representing a key mechanism through which SIRT3 ameliorates oxidative stress-induced mitochondrial dysfunction.

Objective To evaluate management stratagy for patients with traumatic splenic rupture.Methods The clinical data of 124 patients with traumatic splenic rupture admitted to the 422 Hospital of PLA from April 2008 to June 2016 were retrospectively analyzed.38 patients were treated conservatively,while 86 patients underwent surgery.To investigate impact factors of management strategy in patients with traumatic splenic rupture,clinical characteristics and CT features between the two groups were compared.Results Univariate analysis results showed that injury causes,blood pressure,at admission,pulse,CT grade and abdominocentesis were closely related with therapeutic scheme.And multivariate Logistic regression analysis results showed that pulse (OR =4.264,95％ CI 1.206-15.073),CT grade (OR =2.086,95％ CI 1.019-4.271) and abdominocentesis (OR =3.428,95％ CI 1.024-11.479) were the significant determining factors of therapeutic scheme in patients with traumatic splenic rupture.Surgical intervention was carried out in 86 patients accounting for 69.4％ of all patients.The rate of surgical intervention was 58.1％ in the patients with CT grade of 1 and 2,that was 94.7％ in patients with CT grade of 3 and 4.Conclusions Operative management is needed for most traumatic splenic rupture,patients those with hemodynamic stability and CT grade of 1 or 2 may be qualified for watchful non-operative management.

Objective:To explore influence of psychological intervention on mental state in patients With rheumatic heart dis-ease (RHD)after valve replacement surgery.Methods:A total of 60 RHD patients after valve replacement surgery Were randomly and equally divided into routine nursing group and psychological intervention group according to number table,the latter received additional psychological intervention besides routine nursing intervention.Symptom checklist 90 (SCL-90) Was used to assess mental state of tWo groups 1 d before and one Week after surgery.Results:There Were no significant difference in SCL-90 scores betWeen tWo groups before psychological intervention (P>0.05).Compared With routine nursing group one Week after operation,there Were significant reduction in SCL-90 scores of somatization [(1.31±0.47) scores vs.(0.55±0.68)scores],obsessive-compulsive symptom [(2.11±0.35)scores vs.(0.78±0.35)scores],inter-personal relationship sensitivity [(1.57±0.53)scores vs.(1.22±0.46)scores],depression [(1.63±0.29)scores vs. (1.00±0.41)scores],anxiety [(0.98±0.17)scores vs.(0.76±0.13)scores],hostility [(1.11±0.31)scores vs.(0.80 ±0.37)scores]and phobia anxiety [(1.39±0.26)scores vs.(0.53±0.19)scores]in psychological intervention group,P<0.01 or P<0.05. Conclusion:Psychological intervention can alleviate the adverse psychological state and improve quali-ty of life in patients With rheumatic heart disease.