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Objective To study the effect of diosgenin(Dio) from Dioscorea nipponica on the proliferation in mouse spleen T lymphocytes and expressions of IL-2 and IFN-γmRNA,in order to investigate the immunity regulatory mechanism of Dio.Methods T lymphocytes stimulated by different concentrations of Dio and concanavalin A(ConA) were co-cultured.CCK-8 was used to detect the Dio effects on T lymphocyte proliferation.The RT-PCR method was adopted to detect the effect of Dio on expression of IL-2 and IFN-γmRNA.Results The Dio concentration in the range of 0.937 5-15.000 0 μg/mL had the inhibiting effect on T lymphocyte proliferation,Dio concentration in the range of 3.750 0-15.000 0μg/mL had the inhibiting effect on IFN-γ and IL-2 expression in T lymphocytes.With the Dio concentration increase,the inhibition effect was enhanced(P＜0.05).7.500 0 μg/mL was the best inhibition concentration.The inhibition effect was decreased when the concentration exceeding 7.500 0 μg/mL.Conclusion Dio has the inhibiting effect on T lymphocyte proliferation and expressions of IL-2 and IFN-γ mRNA.
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Objective: To investigate the stress and stress distribution generated on each component of implant prosthodontic system and surrounding cortical bone when different diameters of screw-access hole (SAH) were prepared on molar crown. Methods: A fimite element(FE) model of partial mandible without first molar was set up, and an Bego implant was insert into it. A total of 5 models of the crown were computer-simulated by varying the diameter (Φ = 0-4 mm) of the SAH. The loading forces were 200 N axially (0°) and 100 N obliquely (45°) respectively on occlusive surface. The FE analysis was performed by computer. Results: Φ ≤3 mm: stress on occlusal surface of crown was almost unchanged and mainly distributed in the loading area. Φ = 4 mm, stress appeared an obvious rise and reached the maximum, the stress concentration under vertical load was changed to the hole margin. In vertical loading, screw could remain at a relatively low stress level when diameter did not exceed 1 mm. No changes on other components was observed. Conclusion: SAH diameter of 1 mm is recommended when a cement-and screw-retained crown is used in posterior region.
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Objective To analyze the incidence of preterm delivery among single live neonates and the association between maternal reproductive history and preterm birth.Methods A questionnaire survey was conducted on reproductive history among women at childbearing age who were selected through multi-stage stratified random sampling method in Shaanxi,during 2010-2013.Samples would include women at childbearing age and in pregnancy or having had definite pregnancy outcomes.Results A total of 29 608 women at childbearing age with their infants,were studied.The overall incidence of premature delivery among the single live birth neonates under this study,was 2.7％ during 2010-2013.Results from the logistic regression model showed that factors as:having had history with preterm delivery (OR=7.99,95％CI:5.59-11.43),age of the mothers,older than 35 (OR=2.03,95％CI:1.59-2.59) and with history of birth defects (OR=1.54,95％CI:1.01-2.34) were at higher risks for premature delivery in neonates.Intervals on pregnancies between 3-4 years (compared with ≤2 years,OR=0.74,95％CI:0.58-0.93),between 5-6 years (compared with ≤2 years,OR=0.66,95％CI:0.52-0.82),or ＞6 years (compared with ≤2 years,OR=0.48,95％CI:0.37-0.61)together with numbers of parity as 1 (compared with primiparas,OR=0.80;95％CI:0.67-0.95),as ≥2 (compared with primiparas,OR=0.62,95％ CI:0.39-0.97) etc.were protective factors to preterm delivery.Factors as:history of preterm delivery,mothers age (older than 35 years) and intervals of pregnancy,appeared influential to the age of gestation,under the ordinal polytomous logistic regression analysis.Conclusion The incidence of preterm births among single live birth neonates in Shaanxi was lower than the average national level.Programs related to health care services prior to conception and during pregnancy,together with increasing the self-care consciousness of childbearing aged women etc,should all be strengthened in order to reduce the occurrence of preterm birth,in Shaanxi province.
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Objective To analyze the incidence of preterm delivery among single live neonates and the association between maternal reproductive history and preterm birth.Methods A questionnaire survey was conducted on reproductive history among women at childbearing age who were selected through multi-stage stratified random sampling method in Shaanxi,during 2010-2013.Samples would include women at childbearing age and in pregnancy or having had definite pregnancy outcomes.Results A total of 29 608 women at childbearing age with their infants,were studied.The overall incidence of premature delivery among the single live birth neonates under this study,was 2.7％ during 2010-2013.Results from the logistic regression model showed that factors as:having had history with preterm delivery (OR=7.99,95％CI:5.59-11.43),age of the mothers,older than 35 (OR=2.03,95％CI:1.59-2.59) and with history of birth defects (OR=1.54,95％CI:1.01-2.34) were at higher risks for premature delivery in neonates.Intervals on pregnancies between 3-4 years (compared with ≤2 years,OR=0.74,95％CI:0.58-0.93),between 5-6 years (compared with ≤2 years,OR=0.66,95％CI:0.52-0.82),or ＞6 years (compared with ≤2 years,OR=0.48,95％CI:0.37-0.61)together with numbers of parity as 1 (compared with primiparas,OR=0.80;95％CI:0.67-0.95),as ≥2 (compared with primiparas,OR=0.62,95％ CI:0.39-0.97) etc.were protective factors to preterm delivery.Factors as:history of preterm delivery,mothers age (older than 35 years) and intervals of pregnancy,appeared influential to the age of gestation,under the ordinal polytomous logistic regression analysis.Conclusion The incidence of preterm births among single live birth neonates in Shaanxi was lower than the average national level.Programs related to health care services prior to conception and during pregnancy,together with increasing the self-care consciousness of childbearing aged women etc,should all be strengthened in order to reduce the occurrence of preterm birth,in Shaanxi province.
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Objective To investigate the effect of folic acid supplementation in childbearing aged women during pregnancy on the birth weight of newborns in Shaanxi province.Methods A questionnaire survey was conducted among the childbearing aged women selected through multistage stratified random sampling in Shaanxi during 2010-2013,all of these childbearing aged women were in pregnancy or had definite pregnancy outcomes.The birth weight of newborns and folic acid supplementation during pregnancy were used as the dependent variables and independent variables respectively in multiple linear regression model and quantile regression model and confounding factors were controlled.Results Multiple linear regression analysis showed that the birth weight of newborns whose mothers had folic acid supplementation during pregnancy were significantly higher than those whose mothers had no folic acid supplementation during pregnancy,an average increase of 29.56 g (B=29.56,t=4.69 and P＜0.01).Quantile regression analysis showed from very low to higher percentiles (q=0-0.55,q=0.65,q=0.75-0.80),the birth weights of newborns whose mothers supplemented folic acid were higher than those whose mother did not supplement folic acid,the difference was significant,but the increase varied.As the increase of the percentiles of birth weight,the body weight increase declined gradually in those whose mothers had folic acid supplementation compared with those whose mothers had no folic acid supplementation.Conclusion Folic acid supplementation during pregnancy can increase the birth weight of newborns,the influence was greater in newborns with lower body weight than in newborns with higher body weight.
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Objective To investigate the effect of folic acid supplementation in childbearing aged women during pregnancy on the birth weight of newborns in Shaanxi province.Methods A questionnaire survey was conducted among the childbearing aged women selected through multistage stratified random sampling in Shaanxi during 2010-2013,all of these childbearing aged women were in pregnancy or had definite pregnancy outcomes.The birth weight of newborns and folic acid supplementation during pregnancy were used as the dependent variables and independent variables respectively in multiple linear regression model and quantile regression model and confounding factors were controlled.Results Multiple linear regression analysis showed that the birth weight of newborns whose mothers had folic acid supplementation during pregnancy were significantly higher than those whose mothers had no folic acid supplementation during pregnancy,an average increase of 29.56 g (B=29.56,t=4.69 and P＜0.01).Quantile regression analysis showed from very low to higher percentiles (q=0-0.55,q=0.65,q=0.75-0.80),the birth weights of newborns whose mothers supplemented folic acid were higher than those whose mother did not supplement folic acid,the difference was significant,but the increase varied.As the increase of the percentiles of birth weight,the body weight increase declined gradually in those whose mothers had folic acid supplementation compared with those whose mothers had no folic acid supplementation.Conclusion Folic acid supplementation during pregnancy can increase the birth weight of newborns,the influence was greater in newborns with lower body weight than in newborns with higher body weight.
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Objective To investigate the possible mechanism of scutellarin on the apoptosis of human tongue squa?mous carcinoma Tca8113 cells. Methods Human tongue squamous carcinoma Tca8113 cells were divided into control group and scutellarin groups (80, 120 and 160 mg/L). Tunel method was used to detect the apoptosis. Immunohistochemistry and Western blot assay was used to detect the caspase-8 protein expression of cells. Results (1)The apoptotic rates of Tca8113 cells were significantly high in scutellarin groups (80, 120 and 160 mg/L) than those in control group [(17.63 ± 0.25)%, (36.23±0.36)%, (51.84±0.58)%vs (4.45±0.27)%, P<0.05].(2)Compared with control group, the expressions of cas?pase-8 protein were significantly increased in different concentrations (80, 120 and 160 mg/L) of scutellarin groups (0.283± 0.040 vs 0.474±0.031, 0.592±0.077, 0.781±0.020,P<0.05). Conclusion Scutellarin could obviously induce the apoptosis of human tongue squamous carcinoma Tca8113 cells, which may be related to the caspase-8 protein expression.
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Objective To study the effect of Yuzhenxifeng Decoction on the brain ferritin in PD mouse models .Methods All ex‐perimental animals were devided into 4 groups:the control group ,the model group ,the positive drug group and TCM group .Prepare PD model mice with MPTP ,then use the immunohistochemical staining technique to observe the change of expression of Fn .Results the results showed that compared with the model group ,movement coordination disorder of rats in TCM group were relieved ;the Fn level of the model group on 6th ,13th ,20th were higher than control group(P<0 .05) ,and were 2 .21 times ,1 .15 times and 0 .36 times higher respectively .Compared with model group mice ,expression of Fn were enhanced in the treatment group .Conclusion Yuzhenxifeng Decoction can improve the expression of Fn in the brain ,which provide the basis for further study on mechanism of the treatment of Parkinson′s disease .