Electrocardiography ; Humans ; Long QT Syndrome

The antioxidant activity of lycopene is highest among the current carotenoids.Recently the researches on lycopene are focused on ingredient of functional foods in the world.The fermentation production of lycopene by Streptomyces rimosus was reported first time in China.The determination methods,such as spectrophotometric method and HPLC were constructed.Using a stain Fc of Streptomyces rimosus as a original strain,a high-yield lycopene producing mutant strain Fc' was selected after UV mutation.The lycopene yield of the strain is 2.5 times higher than the original strain Fc.The optimal fermentation conditions were determined by flask experiments,and the lycopene yield of strain Fc' reached 230mg/L in flask under the optimal fermentation condition,meanwhile the Streptomyces rimosus strain could produce purer lycopene without adding any blocking agents in its fermentation process.This results lay a good foundation for lycopene commercial production by fermentation using Streptomyces rimosus.

Objective To evaluate the effects of curcumin on the expression of phosphorylated extracellular signal-related kinase (p-ERK) and phosphorylated cAMP response element binding protein (p-CREB) in the spinal dorsal horn and dorsal root ganglion (DRG) in type 2 diabetic neuropathic pain (DNP) in rats.Methods Type 2 diabetes mellitus was induced by high-fat and high-sucrose diet and intraperitoneal streptozotocin (STZ) 35mg/kg,and confirmed by fasting blood glucose level≥ 16.7 mmol/L in male Sprague-Dawley rats.Type 2 DNP was confirmed by the mechanical withdrawal threshold (MWT) and thermal withdraw latency (TWL) measured on day 14 after STZ administration ＜ 80％ of the baseline value,and the rats with type 2 DNP were randomly divided into 3 groups (n =27 each):type 2 DNP group (group DNP),curcumin group (group Cur) and solvent control group (group SC).Curcumin and corn oil 100 mg/kg (25 mg/ml) were injected intraperitoneally once a day for 14consecutive days starting from 14 days after administration of streptozocin in Cur and SC groups,respectively.Another 27 normal rats were served as control group (group C) and were fed with common forage.MWT and TWL were measured at 3,7 and 14 days after curcumin injection (T1 3),and the lumbar segment 4-6 of the spinal cord and DRGs were removed at the same time for determination of the expression of p-ERK and p-CREB (by Western blot).Results Compared with group C,MWT was significantly decreased,TWL was shortened,and the expression of p-ERK and p-CREB in spinal dorsal horn and DRGs was up-regulated at T1-3 in DNP and SC groups,and at T1 in Cur group (P ＜ 0.05).Compared with group DNP,MWT was significantly increased,TWL was prolonged,and the expression of p-ERK and p-CREB in spinal dorsal horn and DRGs was down-regulated at T2,3 in Cur group (P ＜0.05).There was no significant difference in the MWT,TWL and expression of p-ERK and p-CREB between DNP and SC groups (P ＞ 0.05).Conclusion Curcumin can attenuate type 2 diabetic DNP by inhibiting up-regulation of the expression of p-ERK and p-CREB in the spinal dorsal horn and DRG in rats.

OBJECTIVE:To investigate the effects of total paeony glycoside (TPG) on the expression of tumor suppressor gene in lung cancer model rats. METHODS:90 rats were randomly divided into normal group,model group,positive control group [cyclophosphamide,50 mg/(kg·d)] and TPG low-dose,medium-dose and high-dose groups [50,100,200 mg/(kg·d)] with 15 rates in each group. Except for normal group,other groups were given disposable infusion of carcinogenic iodized oil via left lobe bronchus to induce lung cancer model. After modeling,those groups were given relevant medicine intravenously from Monday to Friday,while normal group and model group were given constant volume of normal saline intravenously for consecutive 16 weeks. The expression of multidrug resistance associated protein(MRP),human multidrug resistance gene(MDR1),P21 and P16 mRNA in lung tissue of rats were determined by RT-PCR;the expression of P53 protein in lung cancer tissue was determined by IHC method.The rate of positive expression was calculated,and pathological change of lung tissue was observed. RESULTS:Com-pared with normal group,the expression of MRP,MDR1,P21,P16 mRNA and P53 protein(positive rate of 66.67%)in lung tis-sue was increased significantly in model group (P<0.05);compared with model group,the expression of MRP,MDR1,P21, P16 mRNA and P53 protein (positive rate of 46.67%,46.67%,40.00%,13.33%) decreased in positive control group,TPG low-dose,medium-dose and high-dose groups in dose-dependent manner,and the decrease of TPG medium-dose and high-dose groups were more significant than that of positive control group (P<0.05);there was statistical significance in above indexes among TPG groups(P<0.05). CONCLUSIONS:TPG could inhibit the expression of MRP,MDR1,P21,P16 gene and P53 pro-tein in lung cancer model rats significantly.

Objective To explore the anatomical characteristic of the third palmar interosseous mus- cle as well its dominate nerve,and to investigate the anatomical basis of difficult recovery of digitus minimus adduction.Methods Twenty aduh fresh hands without deformity and trauma were obtained.Dissect and observe the third palmar interosseous muscle and its dominate nerve and adjacent structure under surgical mi- croseope,measure the size of the third pahnar interosseous muscle and its dominate nerve,the data were pro- cessed by stastistics method.Results Among palmar interosseous muscles and its dominate nerves,the third palmar interosseous muscle and its dominate nerve is the smallest.There are conspicuous tendon bundle on the surface of the third palmar interosseous muscle partly,which have a potential compression on the third palmar interosseous muscle dominting nerve.Conclusion The third palmar interosseous muscle is the smal- lest among palmar interusseous muscles and it is the only digitus minimus adduction muscle.The sominating nerve of the third palmar interosseous muscle is small anti the tendon bundle of the third palmar interosseous muscle have a potential compression.All these can cast light on diffcult recovery of digitus minimus adduction.

BACKGROUNDDicycloplatin is a relatively safe third generation platinum-complex anti-cancer drug. The present study focused on the effects of dicycloplatin on in vitro proliferation and apoptosis of human aortic smooth muscle cells (HASMC) and human aortic endothelial cells (HAEC).

METHODSProliferation of HASMC and HAEC, DNA content, and cellular levels of proliferation- and apoptosis-related proteins were assessed using the (3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium) (MTS) assay, flow cytometry and Western blotting assays, respectively.

RESULTSDicycloplatin at 10 ng/ml significantly inhibited HASMC proliferation, however, 10 µg/ml were required to significantly inhibit HAEC proliferation. Cell cycle analysis showed that dicycloplatin was a non-specific inhibitor of the cell cycle. Although dicycloplatin significantly decreased proliferating cell nuclear antigen (PCNA) expression in HASMC at all concentrations tested, it did not significantly affect PCNA expression in HAEC; Bax and p53 protein expression was upregulated in dicycloplatin groups.

CONCLUSIONSDicycloplatin at nanogram concentrations significantly inhibits HASMC proliferation, although the effect is relatively weaker than that of sirolimus. In contrast, the effect of dicycloplatin on inhibition of HAEC proliferation is much less pronounced than that on HASMC. The latter characteristics point to the potential for use of dicycloplatin in drug-eluting stents.

Aorta ; cytology ; Blotting, Western ; Cell Proliferation ; drug effects ; Drug Combinations ; Drug-Eluting Stents ; Endothelial Cells ; cytology ; drug effects ; Flow Cytometry ; Glutamates ; pharmacology ; Humans ; Muscle, Smooth, Vascular ; cytology ; drug effects ; Organoplatinum Compounds ; pharmacology ; Sirolimus ; pharmacology

Objective To evaluate the diagnostic value of MRI in brachial plexus injury.Methods Total 98 patients with brachial plexus injury were examined by MRI before operation.Fifty-four of 98 patients MR imaging were obtained by 0.5 Tesla scanner and other 44 patients were obtained by 1.5 Tesla scanner.The scanning sequences include: SE T_1WI,T_2WI,FFE T_2WI and T_2WI SPIR. Exploration of the supraclavicular plexus was carried out and the MR imaging were compared with the operative finding in 63 patients.Thirty-five patients who had not surgery were followed-up.Results MR imaging found pre-ganglionic injuries in 45 patients and post-ganglionic injuries in 56 patients.Pre-and post-ganglionic injuries simultaneously in 16 patients among them.MR imaging can not find injury sings in 13 patients.The positive rate was 86.73%.MR imaging finding of pre-ganglionic injuries include:(1) Spinal cord edema and hemorrhage,2 patients (4.44% ).(2)Displacement of spinal cord,17 patients (37.78%).(3)Traumatic meningoceles,37 patients (82.22%).(4)Absence of roots in spinal canal, 25 patients(55.56% ).(5)Scarring in the spinal cnanl,24 patients (53.33%).(6)Denervation of erector spine,13 patients (28.89%).MR imaging finding of post-ganglionic injuries include:(1)Trunk thickening with hypointensities in T_2WI,23 patients (41.07%).(2)Nerve trunk complete loss of continuity with disappeared of nerve structure,16 patients (28.57%).(3)Continuity of nerve trunk was well with disappearance of nerve structure,14 patients(25.00%).(4)Traumatic neurofibroma,3 patients (5.36%).Conclusion MR imaging can reveal Pre-and post-ganglionic injuries of brachial plexus simultaneously.MR imaging is able to determine the location (pre-or post-ganglionic)and extent of brachial plexus injury,provided important information for treatment method selection.

OBJECTIVE: To research the value of polymorphism of salivary esterase(Set) in paternity and personal identification. METHODS: Phenotype and genotype of human salivary esterase were detected in 114 liquid saliva samples from the Chinese population by disc electrophoresis and fast blue RR staining assay. RESULTS: The frequency of Set type was F 22.81%, FS 50.88%, S2 6.31%. The estimated gene frequency of SetF was 0.4825 and SetS was 0.5175. The PE was 0.1875 and the DP was 0.6199. CONCLUSION Polymorphism of salivary esterase (Set) was practical in paternity and personal identification.
Esterases/genetics* ; Forensic Anthropology/methods* ; Gene Frequency ; Humans ; Paternity ; Polymorphism, Genetic ; Saliva/enzymology*

OBJECTIVETo explore the relationship between the expression of caspase-3 in testicular germ cells of rats with experimental left varicocele (ELV) and apoptosis of germ cells.

METHODSTwenty-four male SD rats were randomly divided into three groups with eight animals each: sham-operation group (SOG), 30-day post-operation group (PG1) and 60-day psot-operation group (PG2). ELV model was established by the partial ligation of the left renal vein. To detect apoptosis of germ cells and expression of caspase-3, TUNEL assay and immunohistochemistry (SABC) were used respectively.

RESULTSThe number of caspase-3 positive germ cells per tubular cross section in left and right testes of rats in SOG, PG1, PG2 were 0.1175 +/- 0.0129, 0.2463 +/- 0.0421, 0.2938 +/- 0.0511 and 0.1650 +/- 0.0192, 0.2538 +/- 0.0219, 0.2775 +/- 0.0343, respectively. Compared with SOG, the expression of caspase-3 in bilateral testes of rats in PG1 and PG2 were increased, and the differences were statistically significant(P = 0.0115 and P = 0.0144).

CONCLUSIONExpression of caspase-3 protein increased in germ cells of rats with ELV, which may be one of the molecular mechanisms related to excessive testicular germ cell apoptosis.

Animals ; Apoptosis ; Caspase 3 ; biosynthesis ; Disease Models, Animal ; Germ Cells ; cytology ; metabolism ; Male ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Varicocele ; metabolism ; surgery

OBJECTIVETo detect the effects of vasectomy on the growth and apoptosis of prostatic tissue cells.

METHODSForty-five SD rats were divided at random into three groups of fifteen each. Vasectomy (Vsm) model was established by ligating the bilateral vas deferens of the rats in Group A and testosterone propionate and normal saline were subcutaneously injected in those of Groups B and C, respectively. The area percentage of each part in the prostatic tissue was measured with computer-assisted image analysis system. The apoptotic rate was examined with TUNEL.

RESULTSThe ratio of stromal area to epithelial plus lumen area in the prostatic tissues in Groups A, B and C were (29.20 +/- 6.85), (39.77 +/- 7.58) and (48.90 +/- 6.49), respectively, and the differences were significant statistically (P all < 0.05). The apoptosis rates in Groups A, B and C were (6.39 +/- 0.84)%, (2.62 +/- 0.57)% and (4.58 +/- 0.93)%, respectively, significantly higher in Group A than in Groups B and C (P all < 0.05).

CONCLUSIONVasectomy may induce interstitium reduction and cell apoptosis in the prostatic tissues of rats, which may help prevent benign prostatic hyperplasia.

Animals ; Apoptosis ; Image Processing, Computer-Assisted ; In Situ Nick-End Labeling ; Male ; Prostate ; anatomy & histology ; cytology ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Testosterone Propionate ; administration & dosage ; Vasectomy