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Objective To analyze the distributional characteristics of NPC1L1 1 735 C>G polymorphism and the relation-ship between serum lipid levels and obesity in Guangxi Han population.Methods Genotyping of the NPC1L1 1 735 C>G poly-morphism of 409 cases of Han was performed by polymerase chain reaction and restriction fragment length polymorphism combined with gel electrophoresis in all subjects.The relationship of different genotypes in blood lipid levels and obesity were evaluated.Re-sults The frequency of CC,CG and GG genotypes was 39.40%,46.00% and 14.60% in Han.The frequency of C and G alleles was 62.35% and 37.65% in Han.The levels of BMI,LDL-C,ApoB was different among the three genotypes (P G polymorphism in NPC1L1 gene may be correla-ted with serum lipid profiles and obesity,the G allele might increase the risk of hyperlipemia and obesity.
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Lung cancer screening using X-rays has been controversial for many years. A major concern is whether lung cancer screening really brings any survival benefits, which depends on effective treatment after early detection. The problem was analyzed from a different point of view and estimates were presented of the projected lead time for participants in a lung cancer screening program using the Johns Hopkins Lung Project [JHLP] data. The newly developed method of lead time estimation was applied where the lifetime T was treated as a random variable rather than a fixed value, resulting in the number of future screenings for a given individual is a random variable. Using the actuarial life table available from the United States Social Security Administration, the lifetime distribution was first obtained, then the lead time distribution was projected using the JHLP data. The data analysis with the JHLP data shows that, for a male heavy smoker with initial screening ages at 50, 60, and 70, the probability of no-early-detection with semiannual screens will be 32.16%, 32.45%, and 33.17%, respectively; while the mean lead time is 1.36, 1.33 and 1.23 years. The probability of no-early-detection increases monotonically when the screening interval increases, and it increases slightly as the initial age increases for the same screening interval. The mean lead time and its standard error decrease when the screening interval increases for all age groups, and both decrease when initial age increases with the same screening interval. The overall mean lead time estimated with a random lifetime T is slightly less than that with a fixed value of T. This result is hoped to be of benefit to improve current screening programs
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Humanos , Masculino , Teorema de Bayes , Tamizaje Masivo , Rayos X , PulmónRESUMEN
Objective:To observe the resistance of hypericum japonicum Thunb.to helicobacter pylori.Methods:Liquid dilution method was used to culture mixture of hypericum japonicum Thunb.extractum and helicobacter pylori,hypericum japonicum Thunb.extraction and helicobacter pylori respectively.The minimum inhibitory concentration and minimal bactericidal concentration of hypericum japonicum Thunb.extractum and extraction were determined by comparing the growth condition of helicobacter pylori.Results:Both of hypericum japonicum Thunb.extractum and extraction had obvious resistant effect on helicobacter pylori.Conclusion:25 mg/ml hypericum japonicum Thunb.extractum and 6.25 mg crude drug/ml hypericum japonicum Thunb.extraction can suppress the growth of helicobacter pylori effectively.
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@#ObjectiveTo investigate the protective mechanism of Ginsenoside Rb1 on apoptosis of primary cultured cerebral cortical neurons caused by hypoxia.MethodsThe anti apoptosis effect of Ginsenoside Rb1 on primary cultured neurons was observed by methods of the primary culture of cerebral neurons of postnatal rats in free serum with neurobasal medium supplied with 2% B27 supplement, trypan blue exclusion, hypoxic culture of neurons, Hoechst 33342 staining and immunocytochemistry.ResultsAt concentrations of 10μg/ml,50μg/ml and 100μg/ml, the Ginsenoside Rb1 dropped apoptosis rate of cerebral cortical neurons induced by hypoxia (in 100 μg/ml,P<0.05),and increased Bcl-2 protein expression (except 10μg/ml,P<0.05) and decreased Bax protein expression (except 10μg/ml,P<0.05—P<0.001) in the cerebral cortical neurons induced by hypoxia, improved the ratio of Bcl-2/Bax (except 10 μg/ml,P<0.05).ConclusionGinsenoside Rb1 is able to prevent hypoxic neurons from apoptosis in primary cultured cerebral cortical neurons from 50—100 μg/ml. The effect of anti apoptosis is through up regulation of Bcl-2 protein expression and down regulation of Bax-2 protein expression.
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@#ObjectiveTo study the effect of extract of fetal brain (Nerval Active Factors, NAF) on learning, memory and stamina of mice.Methods51 mice were divided into five groups randomly: normal saline as Group A, Cerebrolysin as Group B, NAF as Group C:0.1mg,Group D:0.2mg,Group E:0.4mg, i.p.The time looking for food and error frequency of walking road were tested by using complicated maze, and the drowning time was tested when the mice carried 5% body weight on its back.ResultsBefore and after treatment,the time looking for food in maze showed no significant change in Group A(P>0.1) and was significantly shorter in Group B, C, D and E(P<0.005,P<0.05,P<0.001,P<0.001).There was no significant difference on error frequency of walking road in Group A and B(P>0.2,P>0.5) before and after treatment, while it was significantly decreased in mice of Group C, D and E(P<0.02,P<0.02,P<0.01).There was significant difference on drowned time of mice carrying 5% body weight on back in five groups by analysis of variance (P<0.05) after treatment, but this difference derived from C vs E(P<0.05)and D vs E(P<0.01).Conclusions NAF can raise the activity of learning and memory of mice, as well as increase their stamina. On the other hand, the stamina of mice decreases when NAF is given more than 20 mg/kg body weight.
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Objective:To prepare specific IgY production using Actinobacillus actinomycetemcomitans(A.a) immunizing hen, and then to investigate anti-Actinobacillus actinomycetemcomitans IgY inhibiting growth of A.a and Capnocytophaga gingivalis(C.g). Methods:Using immunization method, water-dilution method, two-step ammonium sulfate precipitation, inhibiting bacteria growth test in liquid anaerobic culture, and ELISA, IgY were induced, extracted, purified, and inhibiting growth of A.a and C.g by the IgY was roundly evaluated. Results:The IgY purity reached to 85.6%~90.3% through 550 g/L and 330 g/L ammonium sulfate precipitation, and efficacy value was 1∶32 000. The IgY efficacy value of anti- A.a was 1∶8 000 against C.g in cross-reactivity.When IgY concentrations of anti-A.a were in the 5.0,1.0,0.1 g/L and concentration of A.a was in the 5?108 CFU/L, the suppression rate of A.a growth were 31.60%(P=0.004),10.24%(P=0.024),-3.30% respectively during 24 h culture and were 64.20%(P=0.004),53.21%(P=0.002),11.20% respectively in 72 h culture. When the concentration of A.a was in the 1?108 CFU/L, the suppression rate of A.a growth were 35.71%(P=0.004),30.95% (P=0.012),11.11% respectively during 24 h culture, and were 65.11%(P=0.005),54.04%(P=0.002),16.17% respectively during 72 h culture. When 5.0 g/L IgY of anti-A.a was cultured with 1?108 CFU/L C.g for 24 h, the suppression rate of C.g growth was 41.61%(P=0.005), and for 72 h it was 86.99%(P=0.014). Conclusion:The hen is able to be induced to produce high efficacy value IgY of anti-A.a by A.a. The specific IgY of anti-A.a is capable of inhibiting A.a and C.g growth. There are common antigens and cross immunizing reactivity between A.a and C.g.