Objective To investigate the association between HLA-DRB1 alleles and pemphigus vulgaris (PV) in a Han population in Sichuan.Methods Polymerase chain reaction with sequencespecific primer (PCR-SSP) method was used for low-resolution and high-resolution typing of HLA-DRB1 alleles in 19 patients of Han nationality with PV and 25 healthy controls in Sichuan.Allele frequencies were calculated,and differences in the allele frequency between the above two groups were compared by using chisquare test.Results Totally,9 kinds of DRB 1 low-resolution alleles and 19 kinds of DRB 1 high-resolution alleles were identified in the PV patients and healthy controls.Frequencies of the DRB1* 14 allele (39.47％[15/38] vs.8.00％[4/50],x2 =17.43,P ＜ 0.05) and DRB1*1405 allele (15.79％[6/38] vs.2.00％[1/50],x2 =4.25,P ＜ 0.05) were significantly higher in the PV patients than in the healthy controls.Conclusion The HLA-DRB1*14 allele may be a common susceptibility gene for PV in the Han population in Sichuan,and the HLA-DRB1* 1405 allele may be most closely associated with PV.

Objective To explore the expression and significance of hedgehog signal molecules (Ptch, Smo and Gli1 ) in pancreatic cancer. Methods Two hundred SD rats were randomly divided into DMBA group ( group A, n = 90), cyclopamine intervening group ( group B, n = 90) and control group ( group C, n = 20).For group A and B, DMBA was directly implanted into the parenchyma of the pancreas to establish the model of pancreatic cancer. The rats in group B were treated with 6.25 ml/kg cyclopamine and DMSO solution intraperitoneally daily. All rats were sacrificed four months later to observe the pancreatic tissue pathologic changes, and immunohistochemistry SP was used to detect the expression of Ptch, Smo, Gli1 protein in pancreatic cancer and normal pancreatic tissue. Results The prevalence rate of pancreatic cancer in group A was 57.5％ (46/80), the maximum size of the tumor was 0.5 ～ ＞2 cm; the prevalence rate of pancreatic cancer in group B was 17.1％ ( 14/82), the maximum size of the tumor was 0.5 ～ 2.0 cm, and the difference between the two group was statistically significant (P ＜0.05). The positive expression rate of Ptch, Smo and Gli1 protein was 82.6％, 73.9％ and 65.2％ in DMBA group, and was 50.0％, 42.9％ and 28.6％ in cyclopamine group, and the difference between the two group was statistically significant ( P ＜ 0.05 ). Ptch,Smo and Gli1 protein was expressed in normal pancreatic tissue. Conclusions Direct implantation of DMBA in the parenchyma of rat pancreas can induce pancreatic cancer with a high incidence in a short time.Hedgehog signal protein expression is significantly increased, cyclopamine can inhibit the occurrence and progression of pancreatic cancer by inhibiting Hedgehog messenger expression.

Epidemiological surveys show that folic acid can prevent prostate cancer, but fortified folic acid may increase the risk of the malignancy. The physician data queries from the National Cancer Institute of the USA describe folate as protective against prostate cancer, whereas its synthetic analog, folic acid, is considered to increase prostate cancer risk when taken at levels easily achievable by eating fortified food or taking over-the-counter supplements. We review the current literature to examine the effects of folate and folic acid on prostate cancer, help interpret previous epidemiologic data, and provide a clarification regarding the apparently opposing roles of folate for patients with prostate cancer. A literature search was conducted in Medline to identify studies investigating the effect of nutrition and specifically folate and folic acid on prostate carcinogenesis and progression. In addition, the National Health and Nutrition Examination Survey database was analyzed for the trends in serum folate levels before and after mandatory fortification. Folate likely plays a dual role in prostate carcinogenesis. There remains some conflicting epidemiologic evidence regarding folate and prostate cancer risk. However, there is growing experimental evidence that higher circulating folate levels can contribute to prostate cancer progression. Further research is needed to clarify these complex relationships.
Dietary Supplements ; adverse effects ; Disease Progression ; Folic Acid ; analogs & derivatives ; blood ; pharmacology ; Food, Fortified ; Humans ; Male ; Nutrition Surveys ; Nutritional Status ; Prostatic Neoplasms ; blood ; chemically induced

Objective To observe the effects of soybean,selenium and spirulina on hemoglobin(Hb)of rats intoxicated with fluorine and aluminiums.Methods According to body weight,84 SD rats were randomly divided into control group,high aluminum group,high fluorine group,high fluorine-aluminum group,high fluorine-aluminium intoxicated rats strengthened with soybean group,high fluorine-aluminium intoxicated rats strengthened with selenium group and high fluorine-aluminium intoxicated rats strengthened with spirulina group,12 in each group.Rats in the control group and the high aluminum group were fed with feed containing 5.2 mg/kg of fluorine and 6.8 mg/kg of aluminum.In other groups,fluorine wag 106 mg/Kg and aluminum 19.7 mg/kg.Fluorine and aluminum concentration in the drinking water of the control group and the high fluorine group were 0.69 mg/L and 0.20 mg/L,respectively.In other groups' drinking water,these values were 0.69 mg/L and 90.2 mg/L,respectively.Ninety days later,Hb concentration of the whole blood was tested.Results Hb concentration of the control group,the high aluminum group,the high fluorine group,and the high fluorine-aluminum group were (160.8±6.3),(142.2±15.9),(156.1±4.9)and(145.2±6.2)g/L,respectively.Fluorine had an effect on the concentration of Hb(F=29.56,P<0.05).The Hb concentration of the high fluorine-aluminum group,the strengthened with soybean group,the strengthened with selenium group and the strengthened with Spirulina group were(145.2±6.2),(150.7±17.7),(156.8±14.5),(154.5±17.8)g/L,respectively.Though the concentration of Hb had increased,there was no significant difference between the four groups(χ2=3.304,P>0.05).Conclusions High-dose fluorine could cause varied decrease in the concentration of Hb.However,aluminum has neitherantagonistic effect nor synergistic effect on the Hb of fluorotic Rat.Soybean,selenium and Spirulina show a trend to increase fluorotic rat's Hb,but they has no evident antagonistic effect.

In order to increase the production of insecticidal crystal proteins Cry1 and Cry2, firstly, Plack-ett-Burman design was applied to evaluate the effectiveness of the related nutrition factors; it was found that the soybean powder and MnSO4?H2O were significant factors for Cry1 production, but the yield of Cry2 wasn’t effected remarkably in such medium. Then the steepest ascent experiment was adopted to approach the optimal region of the medium composition. Lastly, the optimal concentration of the soybean powder and MnSO4?H2O was 11.5 and 0.02 g/L, obtained by response surface methodology (RSM). The final yields of Cry1 and Cry2 was 0.32 mg/mL and 0.11 mg/mL, increasing twice more than that in the medium optimized before. The median lethal concentration (LC50) of optimal medium was 1.09 ?L/mL. The toxicity to Heli-coverpa armigera was significantly enhanced than the old one.

BACKGROUND: A large amount of in vivo and in vitro experiments have confirmed that, basic fibroblast growth factor (bFGF) has been widely utilized in various tissues and cells, it can facilitate the wound healing.OBJECTIVE: To observe the efficacy and feasibility of gene gun-mediate delivery of human bFGF on the healing of deep partial thickness bum wounds.DESIGN, TIME AND SETTING: Randomized design,an observational trial was performed at the Military Central Laboratory of Changhai Hospital in the Second Military Medical University of Chinese PLA between December 2007 and October 2008.MATERIALS: SD rats of clean grade, weighing 200-250 g, irrespective of genders, ware involved in this study.METHODS: Natural human bFGF gene was recombined and optimized, then eukaryotic expression vector pCI-neo-bFGF was constructed taking pCI-neo as a vector, and transfeoted with human embryonic kidney cells 293 T cells. Dot blot and Western blot methods were utilized to determine the bFGF expression. Rat model of deep partial thickness burn wounds was processed into transgene process using gene gun technique, pCI-neo-bFGF-transfected ones served as experiment group while pCI-neo-transfected ones served as controls.MAIN OUTCOME MEASURES:Wound healing time was recorded and the efficacy was evaluated. The contents of hydroxyproline and collaganase Ⅰ in burn wound tissues were determined at 24 hours, 48 hours, 96 hours, 7 days, 10 days and 14 days following transgene process.RESULTS: the recombinant pCI-neo-bFGF was transfected with human embryonic kidney 293T cells. Dot blot and Western blot analysis have showed that, the constructed pCI-neo-bFGF expression vector could express human bFGF, and the expression of synthesized gene was remarkably higher than that of natural gene under fluorescence microscope; gene gun-mediated transgene experiment have showed that, the wound healing time was (13.00+1.31) days in the experiment group and (14.75±1.28) days in the control group, with significant differences (P＜0.05). The contents of hydroxyproline and collagenase Ⅰ reached a peak at 5 days after the injury, that is 48 hours after transfection, and then gradually decreased and maintained at a certain level. The experiment group had higher hydroxyproline levels compared with control group at different time points (P＜0.05, P＜0.01); the collagenase Ⅰ in the experiment group was notably higher than that in the control group at 48 hours and 96 hours after transfection (P＜0.01).CONCLUSION: Gene gun-mediated delivery of human bFGF can short the time of wound healing, increase the contents of hydroxyproline and collagenase Ⅰ during the healing period, accelerate the healing of deep partial thickness burn wounds.

This study examined the role of PI3K/Akt pathway in radiosensitization of DNA damage of cervical carcinoma cells. The 50% inhibition concentration (IC(50)) of cisplatin and docetaxel in HeLa cells was detected by Mono-nuclear cell direct cytotoxicity assay (MTT) in vitro. HeLa cells were treated by cisplatin/docetaxel of 10 percent of IC(20) alone or combined with LY294002 for 24 h, and then radiated by different doses of X-ray. The cell survival ratio was obtained by means of clone formation. One-hit multi-target model was fitted to the cell survival curve to calculate dose quasithreshold (Dq), mean lethal dose (D(0)), 2Gy survival fraction (SF(2)) and sensitization enhancement ratio (SER). The pAkt and total Akt expression was detected by Western blotting and DNA damage by neutro-comet electrophoresis. The HeLa cells were randomly divided into 7 groups in terms of different treatments: Control; radiation treatment (RT) group; LY294002+RT group; cisplatin+RT group; docetaxel+RT group; LY294002+cisplatin+RT group; LY294002+docetaxel+RT group. The apoptosis ratio of each group was measured by flow cytometry. The results showed that docetaxel and cisplatin significantly enhanced the phosphorylation of Akt in radiation-treated HeLa cells. The Dq, D(0) and SF2 in LY294002-contained groups were lower than those in docetaxel or cisplatin+RT group. The SER in the LY294002+docetaxel+RT group was 1.35 times that of the docetaxel+RT group, and that in the LY294002+cisplatin+RT group 1.26 times that of the cisplatin+RT group. The Comet electrophoresis showed that tail distance in the LY294002+cisplatin+RT group or LY294002+docetaxel+ RT group was longer than in the cisplatin+RT group or docetaxel+RT group. The apoptosis ratio in the LY294002+cisplatin+RT group or LY294002+docetaxel +RT group was higher than in the cisplatin+RT group or docetaxel+RT group. It was concluded that inhibiting PI3K/Akt pathway can increase the effect of docetaxel and cisplatin on the radiosensitivity of HeLa cells and DNA damage resulted from radiation.

Objective:To compare the modified Qjng Long Bai Wei needling method and ordinary acupuncture method in the effects of improving the levels of interleukin (IL)-1β,IL-6 and tumor necrosis factor (TNF)-α in the treatment of knee osteoarthritis (KOA),and to determine the advantage of the modified Qing Long Bai Wei needling method for KOA.Methods:One hundred KOA patients were randomized into a treatment group and a control group by using the random number table,with 50 cases in each group.The treatment group was intervened by the modified Qing Long Bai Wei needling method,and the control group was given ordinary acupuncture.The two groups were observed before and after the treatment to determine the changes in the levels of IL-1β,IL-6 and TNF-α in synovial fluid,and the clinical efficacies were compared between the two groups.Results:The total effective rate and clinical recovery rate were 97.9％ and 52.1％ respectively in the treatment group,versus 85.1％ and 25.5％ in the control group,and the between-group differences were statistically significant (both P＜0.01).After the treatment,the levels of Ib1β,IL-6 and TNF-cα in synovial fluid changed significantly in both groups (all P＜0.01);there were significant differences in the levels of IL-1β,IL-6 and TNF-α in synovial fluid between the two groups (all P＜0.01).Conclusion:The modified Qjng Long Bai Wei needling is an effective method for KOA and it can significantly improve the levels of IL-1β,IL-6 and TNF-α in synovial fluid.

AIMTo observe the effect of stretching left ventricles in the end of action potential on rabbit cardiac activity, and to investigate its possible mechanisms.

METHODSStretch (120 mmHg, 50 ms) was applied in the end of action potential by the pressure-clamp technique to observe if there would be any changes in rabbit cardiac activity and streptomycin (500 micromol/L) was used to identify the mechanism.

RESULTSStretch in the end of action potential caused arrhythmia (P < 0.05) and streptomycin blocked the above effect (P < 0.05).

CONCLUSIONStreptomycin could block the effect of stretching left ventricles in the end of action potential on rabbit cardiac activity, which indicates that stretch-activated ion channels involve it.

Action Potentials ; physiology ; Animals ; Arrhythmias, Cardiac ; etiology ; physiopathology ; Female ; Heart Ventricles ; physiopathology ; In Vitro Techniques ; Ion Channels ; physiology ; Male ; Mechanoreceptors ; drug effects ; Proprioception ; Rabbits ; Streptomycin ; pharmacology

OBJECTIVETo investigate the expression of suppressor of cytokine signaling(SOCS)-3 and caspase-3 and their correlative significance in endometriosis.

METHODSImmunohistochemical EnVision method was used to detect the SOCS-3 and caspase-3 protein expression in ectopic and eutopic endometrium (n = 32) of patients with endometriosis, as well as normal endometrium (n = 30) of women without endometriosis.

RESULTSSOCS-3 and caspase-3 proteins were expressed in all three groups and not affected by the menstrual cycles. The expression of SOCS-3 in ectopic endometrium (5.54 ± 2.12) was significantly lower than that in eutopic (7.39 ± 1.09, P = 0.001) and control group (7.48 ± 1.26, P < 0.01), but without difference between the eutopic and control group (P = 0.756). SOCS-3 expression in ectopic and eutopic endometrium was significantly lower in III/IV stages than that in I/II stages of endometriosis (P < 0.05). Significantly lower expression of caspase-3 protein was found in ectopic (3.20 ± 1.24) and eutopic endometrium (3.88 ± 1.93) as compared with the control group (6.49 ± 1.85, P < 0.01), however ectopic and eutopic endometrium showed no significant difference (t = 1.66, P = 0.10). There was no significant difference of the expression of caspase-3 in ectopic and eutopic endometrium at different disease stages (P > 0.05). Positive correlation was found between the expression of SOCS-3 and caspase-3 proteins in ectopic endometrium (r = 0.655, P < 0.01).

CONCLUSIONSOCS-3 may be involved in the development of endometriosis through inhibition of apoptosis of ectopic endometrial cells.

Adult ; Caspase 3 ; metabolism ; Endometriosis ; metabolism ; pathology ; Endometrium ; metabolism ; pathology ; Female ; Humans ; Immunohistochemistry ; Menstrual Cycle ; Middle Aged ; Suppressor of Cytokine Signaling 3 Protein ; Suppressor of Cytokine Signaling Proteins ; metabolism ; Uterine Diseases ; metabolism ; pathology ; Young Adult