Objective To research the optimum hydrolysis conditions of oyster protein so as to raise the protein recovery and degree of hydrolysis.Methods Considering protein recovery,degree of hydrolysis,bitterness and clarity,the best enzyme was selected;Orthogonal test was designed to determine the best enzyme hydrolysis conditions;Based on hydrolysis and protein recovery,the effect of heat treatment,ultrasound and microwave processing and handling on enzymatic hydrolysis of oyster were investigated.Results and Conclusion Bromelain protease was suitable for the proteolysis of oyster,and the optimal conditions were:pH 6,temperature 55℃,substrate concentration 1∶3,E/S=800U/g,4 hours.In the optimal condition,the recovery of protein and degree of hydrolysis were 67.55%and 29.86% respectively in the hydrolysate.Heating,ultrasound technology and microwave treatments before hydro-lysis were harmful to enzymatic hydrolysis of oyster.

Objective To understand the clinical effect of conservative lapamscopic surgery with stripping corpus luteum for fallopian pregnancy to prevent persistent ectopic pregnancy.Methods From January 2005 to Augnst 2008.82 cases of fallopian pregnancy (6 cases for the second time) were performed conservative operatio through laparoscopic surgery with stripping corpus luteum.Seventy one cases underwent salpingostomy to remove the embryo, and other 11 cases were performed with extrusion of embryo sac at ampulla.The level of serum progesterone,β-HCG were measured before and after the therapy.All patients were followed up for one year.Results All patients'surgery had been successfully done through laparoscopie surgery.The duration of stripping corpus luteum was 5 to 10 minutes.The serum β-HCG(Mean±SD:(1213.51±118.84)U/L)and progesterone(Mean±SD:(3.25±2.44)nmol/L)arer operation were significantly lower than before the therapy(Mean±SD:(4267.86±983-56)U/L.(13.71±6.24)nmol/L,respectively)(P<0.01).The decrease of β-HCG value wag significantly correlated with the decreasing of progesterone(r=0.697,P<0.05).Only one patient had a persistent ectopic pregnancy.Fallopian examination through hysterosalpingography after 3 months was unobstructed in 71.1%(32/45 cases)and oh-strueted in 7 cases(15.6%).After one year ofthetherapytwo patients hadectopic pregnancy atthe same fallopian tube.Conclusions For females who have reproductive requirements with experience of fallopian pregnancy,conservative operation through laparoscopic surgery with stripping corpus luteum is safe and effective,and might have an important clinical effect to prevent postoperative persistent ectopic pregnancy.

Objective To investigate the effects of laser irradiation on intracellular ROS(reactive oxidant species),intracellular calcium concentration(_i,and cell membrane integrity in the process of live cell imaging with confocal laser scanning microscopy. Methods The effects of a given laser irradiation on ROS,intracellular calcium concentration(_i and cell viability were revealed respectively by stained ECV-304 with H_2DCFDA,Fluo-4AM and calcein-AM/PI,and visualized and analyzed using ultra view LCI(live cell image)confocal microscopy. Results The irradiation of 488nm laser induced fluorescent intensity of DCF to increase abruptly and attain the climax in about 80 seconds,afterwards the fluorescent intensity fell and returned to the baseline.In the 70 minutes of the irradiation,the fluorescent intensity of intracellular Fluo-4 kept a slightly ascending tendency.The fluorescent intensity of calcein decreased 15minutes after the irradiation,and serval cells were PI positively stained.Conclusion 488nm laser irradiation induces intracellular reactive oxidant species(ROS) and calcium concentration to increase,but there is no significant influence on cell membrane integrity.

Aim To investigate effects of genistein (5, 7, 4′-trihydroxyisoflavone) on rat costochondral growth plate chondrocyte (RGC) collagen and Sox9 expression. Methods Primary cultured RGC, effects of genistein on collagen synthesis, col2a1 mRNA transcription and Sox9 protein expression of 1st passage RGC were detected by isotope incorporation, RT-PCR and western blotting. Results Genistein inhibited collagen synthesis of 1st passage RGC (P

Objective To investigate the effects of protein kinase C (PKC) on proliferation, extracelluar matrix synthesis and transcriptional factor SOX9 (SRY-related high mobility group-box gene 9) expression of rat growth plate chondrocytes in vitro. Methods Rat costochondral growth plate chondrocytes (RGC) were isolated and cultured. The 1st serum free cultured passage RGCs were treated with 1, 10 and 100 nmol/L phorbol 12,13-dibutyrate (PDBu), PKC agonist, cell morphology were observed with inverted microscopy, cell proliferation, COLLAGEN and GAG synthesis were detected by isotope incorporation COLLAGEN TYPEⅡ and AGGRECAN mRNA transcription and SOX9 expression were revealed by RT-PCR and Western blot.Results 100 nmol/L PDBu treatment made the cell morphology of serum free cultured RGC closed to serum group and inhibited proliferation but promoted COLLAGEN and AGGRECAN synthesis, 3H-TdR、3H-proline and 35S-sulfate incorporation of 100nmol/L PDBu group were as 83%, 52.6% and 146.5% as those of serum free control(P

AIM: To establish the methods for rat costochondral growth plate chondrocyte (RGC) separation and culture and investigate their biological features, thereby provide experimental bases for studying the regulation of chondrocyte proliferation and differentiation. METHODS: RGC were obtained by microdissection and digestion, and cultured in monolayer. Morphological changes of the serial passage of RGC and the cell growth kinectics were observed. The cellular GAG and collagen type Ⅱ expression were detected by histochemistry and ICC. RESULTS: There were more than 98% viable cells in the obtained RGC. The morphology of primary cultured RGC was round or polygon. In this experiment, the sixth passage RGC was still maintained and showed polygonal morphology. The index of duplicatings/day increased in the preceding fourth passage RGC and decreased afterwards. There were more than 95% cells expressed collagen type Ⅱ and alcine blue stained positively in the primary RGC, as the passage number increased, the ratio of collagen type Ⅱ expression and alcine blue positive stained RGC dropped abruptly. CONCLUSION: The separation and culture methods adopted in this study can obtain high pure and viable RGC. The preceding three passage RGC maintains their in vivo phenotype, they are idle experimental materials for studying the regulation of proliferation and differentiation of chondrocyte and tissue engineering.

0.05). [3H]-proline incorporation in testing groups was 20% higher than that in control. CONCLUSION: The present study suggests EGF is able to enhance RGCs proliferation and collagen synthesis. Dedifferentiation caused by serial passage decreases proliferative effect of EGF on RGCs, but has no effect on collagen synthesis enhancement.

Objective To investigate the clinical features and related risk factors of nonalcoholic fatty liver disease(NAFLD)in Xinjiang area for early diagnosis and prevention.Methods Retrospective case-control study was done to explore the clinical features and related risk factors of NAFLD with Logistic regression analysis.Results Levels of serum ALT increased significantly in the patients with NAFLD and were often more than 2-fold of the normal limit;serum AST was only increased mildly.Obesity,type 2 diabetes mellitus,heart and brain blood vessel disease and hyperlipidemia were syndromes of NAFLD.BMI、DBP、high lipid food、serum TG、serum ApoB were negatively correlated with the occurrence of NAFLD,while serum HDL was positively correlated with the occurance of NAFLD.Conclusion BMI、DBP、high lipid food、serum TG and serum ApoB may be independent risk factors of NAFLD.To prevent NAFLD and its syndromes,periodical physical examination,changing bad life styles and controlling obesity are most important.

AIM: To investigate the effect of human iNOS gene transfection on blood pressure in SD rats. METHODS: Human iNOS cDNA was transfected using gene transfection technique via enterocolia. The iNOS gene expression in rat celiac macrophages was also observed. RESULTS: The significant lowering of blood pressure in rats transfected with iNOS gene was observed from second day to sixth day after transfection, compaered to the control group ( P

Objective To detect systematic oxidative stress in preeclampsia.Methods (1)Morphological features of placenta hypoxia were observed by histological method ; (2) Level of granulocyte intracellular reactive oxygen species was monitored by dyeing full blood with 2' ,7'-dichlorodihydrofluorescein diacetate (H2DCFDA) ; (3) Level of H_2O_2 in sera was detected by special kits.Results Compared to normal pregnancy,placentas from preeclampsia showed distinct features of hypoxic stress injury,such as more syncytial knots formation,fibrosis emerged,vein in-jury and loss its normal configuration; Fluorescence values of ROS probe in neutrophils from different women were 45.61±12.20(n =49),51.02 ± 13.60(n =56,P <0.01)and 85.10 ± 16.30(n =47,P <0.01); Concentra-tions of H_2O_2were (24.57±5.17)μmol/L(n =49),(26.61±3.25)μmol/L(n =56,P 0.01) and (39.84±9.67)μmol/L(n=47,P<0.01) respectively.Conclusion With the help of histological method,flow cytometry and special kits,systematic oxidative stress can be detected through checking placentic tissues,netrophils and sera of preeclampsia.