Background:Recently,studies have shown that piperlongumine( PL)selectively killed cancer cells by elevating reactive oxygen species(ROS)in various cancers. However,the effect of PL on gastric cancer cells remained to be further studied. Aims:To investigate the effect of PL on proliferation and apoptosis of human gastric cancer cell line MKN45 and its underlying mechanism. Methods:MKN45 cells were treated with different doses of PL,caspase inhibitor,antioxidant, and their combinations,respectively. Cell viability was assessed by CCK-8 assay;cell cycle,apoptosis and intracellular ROS level were measured by flow cytometry;and Western blotting was employed to determine the expression of apoptosis-related proteins( XIAP,cleaved-caspase3,7,9 and cleaved-PARP),p53 and its downstream target genes( p21, GADD45α and PUMA). Results:PL inhibited the proliferation of MKN45 cells in a dose- and time-dependent manner. In MKN45 cells treated with PL,the proportion of cells in G1 phase,apoptotic rate and intracellular ROS level were significantly increased,the expression of inhibitor of apoptosis protein XIAP was down-regulated,and the caspase-dependent apoptosis pathway,p53 and its downstream target genes were activated. Pretreatment with antioxidant NAC or Z-VAD-FMK, a general caspase inhibitor could partially abolish the effect of PL on ROS production and its antitumor effect. Conclusions:PL can inhibit cell proliferation and induce cell cycle G1 phase arrest and apoptosis in MKN45 cells. Its antitumor effect may be associated with a ROS-mediated p53 activation and subsequent triggering of caspases cascade of cell apoptosis.

Objective To exlplore the adverse effect of formaldehyde on DNA in isolated mice testicular cells. Methods The testicular cells were exposed to formaldehyde of different concentrations(0, 25, 50, 75, 100 ?mol/L), comet assay was applied to detect DNA breaks. Results Formaldehyde induced DNA breaks at 10 ?mol/L, 25 ?mol/L and 50 ?mol/L (P0.05). The critical concentration at which formaldehyde could induce DNA strand breaks of testicular cells was about 10 ?mol/L, peak point was near 50 ?mol/L. Conclusion Formaldehyde may cause DNA damage in isolated mice testicular cells in various degree.

ObjectiveTo assess the left ventricular systolic and diastolic function in patients with type 2 diabetes mellitus(DM) using quantitative tissue velocity imaging(QTVI) ,and to provide reliable evidence for early diagnosis and prevention in diabetic cardiomyopathy.MethodsOne hundred and twenty one type 2 DM patients were divided into two DM 1 groups (61 patients without microangiopathy) and DM2 group (60 patientswith microangiopathy).Fifty normal subjects were enrolled as control group.The index of echocardiography,including the LVEF, FS and mitral peak flow velocity during early and late diastole (E/A) were measured by conventional echocardiography,and the ratio of E/A was calculated.The average peak velocities of six LV wall sites at mitral annuluses during systole, early and late diastole(MEm, MEm, MAm) were measured by QTVI, and the ratio of MEm/MAm was calculated.Results Compared with the normal group, MSm ([7.13 ± 1.42])cm/s vs.([6.49 ± 1.29]cm/s), MEm ([6.22 ± 1.39]cm/s) vs.([4.53 ± 0.94]cm/s) and MEm/MAm ([0.79 ±0.17]vs.[0.59 ± 0.19]) in DM patients were significantly decreased(F = 5.32,8.01 ,4.89 ; Ps ＜0.05).There was no significant differences among three groups in the comparisons of LVEF ([67.45 ±5.47]％),([65.91 ±4.83]％),([68.01 ±6.16]％) and FS([38.84±4.23]％,[37.82±5.43]％),([40.17 ± 4.53]％)(F = 1.89 and 2.46 respectively, P ＞ 0.05) .In addition, E/A of DM2 group (0.71 ±0.21)decreased more dramatically than DM1 and normal (0.91 ± 0.18,1.02 ± 0.24)(F = 4.71, P ＜ 0.05)ConclusionCompared with EF,FS and E/A obtained by conventional echocardiography,QTVI-derived MSm,MEm and MEm/MAm are more sensitive indexes to defect early LV dysfunction.The functional disorder appears early than microangiopathy, and the left ventricular systolic and diastolic function gets worse along with the microangiopathy.

Objective To investigate the effects of hyperbaric oxygen (HBO) on the systemic inflammation response in patients with severe traumatic brain injury (TBI), and to explore HBO therapy mechanisms. Methods Seventy patients with severe TBI were randomly divided into a routine treatment group ( RT group, n = 35 ) and an HBO group (n=35). All patients received conventional treatment, but the HBO group received additional early HBO therapy. Twenty age-and sex-matched normal subjects were recruited and served as normal controls. Serum interleukin-6 (IL-6) was measured by ELISA, and C reactive protein (CRP) was also measured on days 1, 7, 14 and 21 after injury. Sequential organ failure assessments (SOFAs) and Glasgow coma scale (GCS) scores were evaluated at the same time points. Systemic inflammatory response syndrome (SIRS) was assessed daily. Results The concentrations of serum IL-6 and CRP increased obviously following TBI, but patients in the HBO group exhibited significantly lower levels at each time point than those in the RT group. In the HBO group fewer cases of SIRS developed,and they had a significantly shorter average duration than those in the RT group. The average SOFA score in the HBO group was significantly lower than that of the RT group at days 14 and 21 after injury, and the GCS scores had improved significantly more by day 21. Compared with the patients who were free of SIRS, the patients with SIRS showed higher levels of IL-6 and CRP, higher SOFA scores as well as lower GCS scores ( all differences statistically significant). Conclusions HBO therapy can attenuate systemic inflammation after TBI, protect the functions of important organs and improve clinical outcomes. Decreasing the level of IL-6 may contribute to the effectiveness of HBO.

Objective To investigate the clinical values of brain natriuretic peptide (BNP) in combination with TDI in diagnosing left ventricular hypertrophy (LVH) and impaired diastolic function in elderly hypertensive patients. Methods The 140 elderly hypertensive patients were divided into LVH group (n=69) and NLVH group (n=71). Control group consisted of 50 normal subjects. Plasma BNP level and index of echocardiography, including mitral peak flow velocity during early and late diastole (E, A), ratio of E/A, average peak velocities of six LV wall sites at mitral annuluses during early and late diastole (MEm, MAm), ratios of MEm/MAm and E/MEm were measured in all patients. The correlation of plasma BNP level with cardiac ultrasonographic findings was also examined. Results The level of BNP [(61.64±37.18)ng/L, (138. 65±30. 23)ng/L] and the ratio of E/MEm (11.3±1.83, 15.7±1.45) were significantly higher in NLVH group and LVH group than in normal group (P＜0. 05 or P＜0. 01). MEm [(6.32±0. 94)cm/s, (4.29±0. 91)cm/s]and MEm/MAm (0.76±0.19, 0.51±0. 11) were significantly lower in NLVH and LVH group than in normal group (P＜0.05 or P＜0. 01). The BNP level was negatively correlated with E/A, MEm and MEm/MAm (r=- 0. 294, r= 0. 387 and r= 0. 422, all P＜0. 01), and was positively correlated with LVMI and E/MEm (r=0.342, r=0.501, all P＜0.01). Conclusions Left ventricular diastolic function is impaired in elderly hypertension patients regardless of LVH or NLVH.Plasma BNP level in combination with echocardiography parameter is accurate to evaluate the LVHand impaired diastolic function in elderly hypertensive patients.

Primary hyperparathyroidism (PHPT) in children is a rare condition,co-existing with vitamin D deficiency can lead to more diagnostic uncertainty.Here we report a case of a boy with PHPT complicated with vitamin D deficient rickets.The diagnosis and treatment of this patient was analyzed against literature review to summarize evidence-based clinical features of PHPT in children.We found that compared with adult PHPT,PHPT in children is associated with severer symptoms,higher serum calcium level,lower parathyroid hormone,preponderance of single adenoma in pathology,and higher cure rate of surgery.Co-existence of osteomalacia may induce reduction of the serum calcium level to the normal range,but cause more severe bone lesions.

Objetive: To investigate the operative method of the true aneurysm in the initial part of splenic artery, and to summary clinic therapeutic experiences. Methods: To summary the 7 patients who suffered from the initial splenic true aneurysm from 1996 to 2006, and which cases were identified by color ultrasound, CT scan and angiography. All splenic aneurysm were cut off including splenic artery revascularlization on 5 patients. Results: All patients were cured and discharged from hospital in the 10th-14th day, and which patients were followed-up for 1-9 years. 5 cases were healthy except one died of acute myocardiac infarction 2 years later post operation. Conclusion: To cut off the initial splenic true aneurysm and to revasculize splenic artery is a better operative method to cure this disease.

The relationship between 5-HT receptor and a-adrenoceptor was investigated in rat medullary slice preparations. In 57 nucleus tractus solitarii (NTS) neurons, 47 (82.5%) responded to both serotonin (5-HT) and norepinephrine (NE). After synapse transmission was blocked by perfusion of artificial cerebrospinal fluid (ACSF) with low calcium and high magnesium, 5 in 8 neurons were still sensitive to both 5-HT and NE. On the other hand, 3 in 5 neurons responding only to 5-HT or NA were sensitive to both 5-HT and NE after the synapse transmission blockage. In some neurons which exhibited excitatory or inhibitory responses to 5-HT or NE alone, the responses were inversed when perfused with 5-HT and NE in combination. These results suggest that there may exist an inhibitory interaction between 5-HT receptors and a-adrenoceptors in NTS and that most 5-NT and a-adrenoceptors coexist in the same NTS neurons.

To review the clinical data of 13 patients with benign stenosis in deep small intestine treated by balloon-assisted enteroscopy from September 2017 to December 2019, and to evaluate the stenosis characteristics, endoscopic treatment effects and its safety in different lesions. The results showed that there were 6 cases of Crohn disease (CD), 4 cases of cryptogenic multifocal ulcerative stenosing enteritis (CMUSE) and 3 cases of small bowel stenosis with unknown etiology. A total of 38 stenoses were found after 17 enteroscopic treatments, including 35 web-like stenoses and 3 columnar stenoses. Thirteen stenoses were found in 6 patients with CD, including 4 single stenosis, 1 case of 3 stenoses and 1 case of 6 stenoses. Twenty-one stenoses were found in 4 patients with CMUSE and they were all web-like stenosis. A total of 18 times of balloon dilatation and 10 times of IT knife incision were performed. The technical success rate was 88.2% (15/17), and the clinical effective rate was 76.9% (10/13). The follow-up time was 3-28 months, and one patient underwent surgical treatment. There was 1 case of delayed hemorrhage and 3 cases of delayed perforation after operation. They were all improved by medical treatment. These results indicated that treatment of benign stenosis in deep small intestine by enteroscopy is technically feasible and can improve the symptoms of patients in a short time.

10.3969/j.issn.1000-8179.2013.12.008