Objective To study the effect and mechanism of polypeptide from Chlamys farreri(PCF) on the thymocytes damaged by 60Co γ-rays. Methods The ceils were randomly divided into six groups: control group, 60Co groups (2 Gy, model),60Co + 0.5% PCF, 60Co+ 0.25% PCF, 60Co + 0.125% PCF, 60Co +0.1% VitC. The concentration of GSH-Px, ROS, A-SAC, T-AOC and the cells' viability were determined. The mitochondria membrane potential were tested. The expressions of P53, Bax and Bel-2 proteins were examined.Results The activities f GSH-Px, A-SAC, T-AOC in cells were enhanced, and the amounts of ROS were decreased by PCF. The expression of Bcl-2 gene was up-regulated, and down-regulated for the expression of P53 and Bax. All observed indexes of the PCF groups were significantly different compared with model group (P <0.05). Conclusions PCF has the protective effects on damages of thymocytes caused by 60Co irradiation. The mechanisms might be related to inhibiting of lymphocyte apoptosis and enhancing the activities of lymphocytes.

Objective To investigate the synergistic effects of pirarubicin (THP) combined with hyperthermia on proliferation and invasive potential of gastrointestinal cancer cells in vitro and to discuss the underlying mechanisms. Methods Gastric cancer cell line MGC-803 was established, and they were divided into 4 groups: control group (37℃), high temperature group (43℃), drug group (37℃+THP), and drug and high temperature group (43℃+THP). After THP and hyperthermia treatment, cell proliferative ability was determined by soft agar clonogenic assay, cell nuclear antigen PCNA was detected by flow cytometry, cyclin E mRNA level was assessed by reverse transcription PCR (RT-PCR). Cell invasion assay was assessed by using transwell chamber model. Results Strong synergistic inhibitory effects on clonogenic ability of MGC-803 cells were observed after MGC-803 cells were treated with pirarubicin in combination with hyperthermia (P

AIM: To study the effects of aspirin-niacinamide-zinc complex (WUY) on platelet aggregation and experimental thrombosis. METHODS: With adenosine diphosphatethe (ADP), arachidonic acid (AA) and collagen, the effects of aspirin-niacinamide-zinc complex (WUY) on platelet aggregation in vitro or in vivo were investigated by Born's method. The mouse mortality caused by intravenous injection of AA and experimental thrombus formation in rats were observed. Radioimmunoassay was used for measuring thromboxane B_2 (TXB_2) and 6-keto-PGF_(1?) in plasma of rabbits. RESULTS: In high, middle and low dose groups, drugs, in vitro, inhibited ADP-, AA-and collagen-induced platelet aggregation and the effect of WUY was stronger than that of ASP in high dose groups. In vivo, WUY showed more potent inhibitory effects on AA-induced aggregation in 1 h and 3 h. WUY had a powerful inhibitory effect on mouse death as a result of pulmonary thrombi induced by AA injection into the tail vein and ED_(50) was lower than that of ASP. In addition, WUY exhibited strong inhibitory effect on thrombus formation in rat arteri-venous shunt and significantly reduced plasma level of TXB_2 while it markedly increasing 6-keto-PGF_(1?) in high dose groups and ASP significantly reduced plasma level of both TXB_2 and 6-keto-PGF_(1?). CONCLUSION: The effect of WUY on platelet aggregation and experimental thrombosis is stronger than that of ASP and can increase plasma level of 6-keto-PGF_(1?).

Objective To observe the therapeutic effects of aqueous extract of ginger on vascular dementia(VD) in rats.Methods Male SD rats were randomly divided into sham-operation group, model contral group, huperzine A group and three ginger aqueous extract groups for high, middle and low dosage. The VD rat model was established by bilateral corotid ligation and repeated cerebral ischemia reperfusion. Spatial learning and memory abilities in both place navigation test and spatial prob test were evaluated with Morris water maze. The activitie of acetylcholinesterase (AChE) in cortex and striatum tissue and SOD and MDA content in brain tissue was detected by spectrophotometry.Results Compared with sham-operation group, the rats in model control group exhibited serious learning and memory deficits in both place navigation test and spatial prob test and decreased significantly AChE activity in striatum tissue. Aqueous extract of ginger could not only improve the learning and memory abilities in both place navigation test and spatial prob test, but also increase AChE activity and the ratio of SOD/MDA and decrease MDA content in brain tissue. Conclusion Aqueous extract of ginger has obvious effects on improving learning and momery abilities of rats with VD. Increasing the function of cholinergic neuron and inhibiting AChE activity are likely to be the partial mechanism.

Objective To compare the therapeutic effect between routine shunting and selective shunting in patients with moderate and severe carotid artery stenosis undergoing carotid endarterectomy (CEA). Methods One hundred and ninety-two patients with moderate and severe carotid artery stenosis undergoing CEA were selected, and the patients were divided into control group (routine shunting) and observation group (selective shunting) according to the random digits table method with 96 cases each. The intraoperative carotid artery occlusion time and incidences of stroke event 30 d after operation were recorded. Results In the observation group, the rate of carotid artery shunting was 35.4％ (34/96), among which the rate of carotid artery shunting in patients with contralateral severe carotid artery stenosis or occlusion was 8/13, the rate of carotid artery shunting in patients with unilateral carotid stenosis was 31.3％ (26/83), and there was statistical difference (χ2 = 13.006, P<0.01). There was no statistical difference in intraoperative carotid artery occlusion time between control group and observation group ( t=2.091, P>0.05). In the observation group, the intraoperative carotid artery occlusion time in patients with carotid artery shunting was significantly shorter than that in patients without carotid artery shunting:(4.36 ± 0.48) min vs. (10.15 ± 0.91) min, and there was statistical difference (t=7.884, P<0.05). There was no statistical difference in the incidence of stroke event 30 d after operation between control group and observation group (χ2 = 1.189, P>0.05). Conclusions The selective shunting during CEA can reduce the incidence of postoperative stroke event in patients with carotid artery stenosis, and especially it can give a good clinical effect in the patients with contralateral severe carotid artery stenosis or occlusion.

In order to improve the expression level of segment of GABAA receptor a1 subunit in E. coli, growth conditions of the recombatant, which influence the final yield of protein expression, including growth medium, inoculation ratio, temperature, pH, rotation speed, inducing time and concentration of IPTG and so on, were studied in shaking flasks. The results indicated that, with 3% inoculation ratio, cultured 3.5 hours at 37℃, and then induced 5 hours by IPTG at 32℃, the yield of GABAA receptor protein was 95mg/L and the biomass was 3.25 g/ L. In contrast, using a 16 L stirred fermentor instead of shaking flasks, the highest level of the protein expression, 136mg/L with 4.95g/L of biomass, was achieved after fermenting 5.5 hours.

OBJECTIVETo observe the clinical efficacy of treating chronic persistent bronchial asthma (CPBA) children with abnormal myocardial enzyme spectrum (AMES) by Yupingfeng Powder (YP) combined routine therapy.

METHODSFrom January 2010 to December 2012, 156 CPBA children patients with AMES were randomly assigned to the treatment group (80 cases) and the control group (76 cases). All patients received routine treatment (inhaled corticosteroids and/or leukotriene regulator). Besides, those in the treatment group took YP. The treatment duration was 3 months. The scores of children asthma control test (C-ACT), pulmonary function (FEV,% and PEF%), myocardial enzyme spectrum were observed before and after treatment, and 3 months before and after treatment. The myocardial enzyme spectrum of 40 healthy children at the baby clinics during the same period were recruited as the control.

RESULTSCompared with the control group, creatine kinase isoenzyme (CK-MB), creatine kinase(CK), and lactate dehydrogenase (LDH) increased in the two treatment groups (P <0.01), but there was no statistical difference in AST (P >0.05). Compared with before treatment in the same group, CK-MB, CK, LDH, and AST decreased in the treatment group after treatment and 3 months after treatment (P <0.01). CK-MB, CK, LDH, and AST decreased in the control group 3 months after treatment (P <0.01, P <0.05).Compared with after treatment, CK decreased in the control group 3 months after treatment (P <0.01). C-ACT score, FEV(1),%, and PEF% all increased in the two groups after treatment and 3 months after treatment (P <0.01, P <0.05). Compared with after treatment in the same group, CK decreased in the control group 3 months after treatment (P <0. 01). Compared with the control group in the same period, post-treatment CK-MB and CK decreased (P <0. 01, P <0. 05), while post-treatment C-ACT score, FEV, %, and PEF% increased (P <0.05) in the treatment group (P <0.05).

CONCLUSIONYP could strengthen specific and non-specific immunity of the organism, and improve clinical symptoms and the level of myocardial enzyme spectrum.

Asthma ; therapy ; Child ; Chronic Disease ; therapy ; Creatine Kinase, MB Form ; metabolism ; Drugs, Chinese Herbal ; therapeutic use ; Humans ; L-Lactate Dehydrogenase ; metabolism ; Myocardium ; enzymology

To study the related substances in nicergoline, electrospray positive ionization high resolution TOF/MS was used for the determination of the accurate mass and elemental composition of the related substances. Triple quadrupoles tandem MS/MS was employed for the determination of the fragmentations of the parent ions. 16 related substances were detected and identified to be eight synthetic by-products and eight degradation products, by using impurity references matching, product mass spectra fragmentations elucidation, and verified further according to synthetic processes and stress testing results. The results obtained are valuable for nicergoline manufacturing process control and quality assurance.
Chromatography, High Pressure Liquid ; Nicergoline ; chemical synthesis ; chemistry ; Quality Control ; Tandem Mass Spectrometry

Objective To investigate the effects of methamphetamine (Meth) on the outward K+ currents and elucidate the role of outward K+ channels in Meth induced hippocampal neuron damage.Methods Hippocampal neurons were harvest from 18-day-old embryonic rats and were divided into two groups:the control group and the Meth treated group.Both of 4-AP and TEA sensitive K+ currents were recorded after the treatment of Meth by performing the whole cell patch clamp.Furthermore,the MTT and TUNEL assays were performed to evaluate the effects of K+ channel on hippocampal neuron damage mediated by Meth.For statistical comparison,One-way ANOVA and LSD multiple comparison test or t-test was used.P-value ＜ 0.05 was considered to be statistically significant.Results The density of 4-AP sensitive K+ channel currents in Meth treated group [(120.1 ± 19.6) pA/pF,n =7] were significantly increased when compared with control group [(87.4 ± 12.5) pA/pF,n =10,P ＜0.01] and the increments of the currents induced by Meth was dose dependent.The MTT data showed that the cell viability was obviously decreased in Meth treated group (48.72 ± 4.38) ％ relative to the control group (100.07 ± 3.36) ％.Moreover,application of K+ channel antagonist,4-AP (61.39 ± 3.15)％,and the high K+ solution (78.25 ± 9.42) ％ substantially enhanced the cell viability.The TUNEL assay showed there were protective effects of 4-AP and the high K+ solution against neuron damage observed during cells exposed to Meth.Conclusions The increments of 4-AP sensitive K+ channel currents induced by Meth might be involved in hippocampal neuron damage.

Objective To study and observe the change of nerve function and erythrocyte immune indexes of patients with severe craniocerebral injury during the perioperative period.Methods Forty patients with severe craniocerebral injury treated with surgery in our hospital from July 2013 to August 2015 were selected as the observation group and 40 healthy persons with the same ages in the same period were selected as the control group.The nerve function related indexes and erythrocyte immune indexes of observation group before and at first,third,fifth,seventh,tenth and fourteenth day after the surgery and those of control group were compared.Results The serum nerve function related indexes of observation group before and at first,third,fifth,seventh,tenth and fourteenth day after the surgery were higher than those of control group.The erythrocyte immune indexes of observation group before and at first,third,fifth,seventh and tenth day after the surgery were worse than those of control group.The erythrocyte immune indexes at fifth and seventh day after the surgery were worse than those before and at first,third,third,tenth and fourteenth day after the surgery.The differences of comparison indexes were all significant (P＜0.05).Conclusion The change of nerve function and erythrocyte immune indexes of patients with severe craniocerebral injury during the perioperative period are obvious.Those indexes should be paid with enough monitoring and intervention.