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Objective To investigate clinicopathological significance of atypical squamous epithelium cells which cannot exclude high grade squamous intraepithelial lesions (ASC-H) in the diagnosis of cervical diseases. Methods The results of age, high-risk human papillomavirus DNA (hrHPV DNA) and cervical biopsy in 496 patients with ASC-H from March 2012 to December 2015 in Shanxi Dayi Hospital were analyzed. Results Among 496 ASC-H cases, the proportion of the patients between 40 and 49 years old was the highest [30.8 ％ (153/496)]. HrHPV DNA was detected in 154 cases, and the positive rate was 79.2 ％(122/154), and the positive rate of patients at the age of 18 to 29 years old was the highest [84.2 ％ (16/19)]. The detection rate of cervical intraepithelial neoplasia (CIN) Ⅱand above lesions in 124 cases with cervical biopsy was 66.9 ％ (83/124), including 100 cases with hrHPV DNA positive (80.6 ％) and 24 cases with hrHPV DNA negative (19.4 ％). There were 71 cases (71.0 ％) of CINⅡ, CIN Ⅲ, early squamous carcinoma and squamous cell carcinomas in 100 hrHPV DNA positive patients with cervical biopsy. There were 12 cases (50.0 ％) of CINⅡ/Ⅲ changes in 24 hrHPV DNA negative patients with cervical biopsy, but none in early squamous carcinoma and squamous cell carcinomas was detected, and there was a significant difference between hrHPV DNA positive and negative patients (χ2=3.857, P< 0.05). The positive predictive value, negative predictive value, sensitivity and specificity of hrHPV DNA detection for diagnosis of CINⅡand above lesions were 85.5 ％, 29.3 ％, 71.0 ％ and 50.0 ％, respectively. Conclusions ASC-H strongly predicts CINⅡand above lesions in cervical cytology. The detection of hrHPV DNA has a high positive predictive value for CINⅡand above lesions.
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Objective To explore the effects of iPS cells-derived chimeric thymus transplantation on T cells reconstitution and graft versus host disease of murine after allo-BMT. Methods iPS cells-derived chimeric thymus was grafted under the renal capsules of mice after allogeneic IBM-BMT. The mice were divided into three groups:IBM-BMT group, IBM-BMT+TT group and IBM-BMT+DLI group. Four weeks after BMT, T lymphocyte subsets in the peripheral blood were analyzed by flow cytometry, the degree and pathological examination of GVHD were observed, respectively. Results Percentage of CD8+T cells in IBM-BMT group, IBM-BMT+TT group and IBM-BMT+DLI group was(5.52 ± 0.83)%,(11.10 ± 1.49)%and(8.49 ± 0.82)%respectively, there was signifi-cant difference between pairwise comparisons(P<0.05), and percentage of CD4 + T cells of the peripheral blood in IBM-BMT+TT group(9.60 ± 0.69)%was significantly higher than IBM-BMT group(6.42 ± 1.40)%and IBM-BMT+DLI group(8.07 ± 0.65)%(P<0.05) . IBM-BMT group and IBM-BMT+TT group showed less clinical and histopathological scoring of GVHD than IBM-BMT + DLI group. Conclusion iPS cells-derived chimeric thymus transplantation could effectively accelerate T cells reconstitution and prevent GVHD after allo-BMT.
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Objective To explore the establishment of animal model of allogeneic bone marrow transplantation plus thymic epithelial cells transplantation,and then examine the feasibility and effects of thymic epithelial cells transplantation applied in allogeneic bone marrow transplantation.Methods One day before transplantation the recipient BALB/C mice were given total-body irradiation,then transplanted with bone marrow cells from donor C57BL/6 mice and thymic epithelial cells from E14-16 embryonic thymus of donor C57BL/6 mice.In order to explore the appropriate irradiation dose,we set up three different dose groups:7 Gy;6.5 Gy;6 Gy.The recipient mice transplanted with BMT plus TCT served as experimental group,and those transplanted with BMT only served as control group (n =8 each).Then in vivo imaging in mammals was done to observe the thymic epithelial cells transplantation.Thymus index was measured.The thymus in each group was collected for histological examination and immunohistochemical staining of K5 and K8.Flow cytometry was used to examine the T cells subsets in peripheral blood of recipient mice 4 weeks after thymus transplantation.Results The recipient mice with 6.0 Gy TBI had long-term survival but implantation was done unsuccessfully,and those with 6.5 Gy had lower survival rate but implantation was done successfully.6.5 Gy was the minimum lethal dose and could be used as the appropriate irradiation does in this study.In vivo imaging in mammals detecting system showed the experimental group obvious fluorescent signals could be detected in the experimental group,but no fluorescence was found in the control group.Four weeks after transplantation,the thymus was bigger and thymus index was higher in the experimental group than in the control group.And the chiemra thymus of the experimental group also had normal cortex and medulla histological structure.Four weeks after transplantion,the percentages of CD4+ and CD8+ T cells of the peripheral blood in experimental group were significantly higher than in control group (P＜ 0.05).Conclusion Thymic epithelial cells can be transplanted in the thymus of the recipient mice with allogeneic bone marrow transplantation and promote the reconstitution of T lymphocytes of peripheral blood in the recipient mice.
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Objective To examine an in vivo method for the differentiation of induced pluripotent stem cells (iPSCs) into thymic epithelial cells (TECs) in mice. Methods Green fluorescent protein-expressing iPS cells, derived from C57BL/6 mice, were injected into blastocysts from ICR mice. Chimeric blastocysts were then transferred into uteri of E2.5 pseudopregnant mice. Chimeric mouse could be identified by coat color 10 days after birth. The chimeric thymus was transplanted under the renal capsule of BALB/c nude mice. The spleen was cut out from the thymus-transplanted nude mice and the cells were dispersed and analyzed by a flow cytometer 4 weeks after transplantation. Results Chimeras were born 17 days after embryo transfer and 13 live-born chimeras were obtained. The contribution of iPSC-derived cells in the chimeras ranged from 5% to at most 90%. Typical thymic epithelium structure consisted of green fluorescent protein-expressing cells in chimera. The iPSCs-derived thymic epithelial cells could support the generation of new T cells. Conclusion The results indicate that mouse iPS cells can differentiate in vivo towards normally functioning TECs.
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In order to prepare antioxidant peptide through hydrolyzing low-value protein resources with bacterial extracellular proteases and to discover novel proteases, crude extracellular protease from Pseudoalteromonas sp. SHK1-2 was obtained through fermentation which was used to hydrolyze collagen extracted from Cirrhinus molitorella skin. Small peptide fraction was isolated from hydrolysate by ultrafiltration and Sephadex LH-20 size exclusion chromatography and showed 1, 1-diphenyl-2-picrylhydrazyl radical scavenging activity (35.6%±7%), oxygen radical absorbance capacity and inhibition of DNA oxidation damage. The molecule weight was 776.2 Da, and amino acid sequence was Thr-Ala-Gly-His-Pro- Gly-Thr-His through liquid chromatography mass spectrum. Our findings suggest that peptide obtained from low-value protein of fish waste by hydrolysis with bacterial protease has antioxidant activity.
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Animals , Amino Acid Sequence , Antioxidants , Chemistry , Chromatography, Gel , Collagen , Chemistry , Cyprinidae , Dextrans , Hydrolysis , Oxidation-Reduction , Peptide Hydrolases , Peptides , Chemistry , Skin , ChemistryABSTRACT
Objectives To study the psychological characteristics of children with attention deifcit hyperactivity disorder (ADHD). Methods Human ifgure drawings (HFD) as a projective technique was performed in 107 children with ADHD aged (8.69 ±1.48) years old (6.5~11.5 years), and 107 matched healthy children. Characteristic features of the HFDs in children with ADHD, and correlations between emotional indicators of the HFDs and factors of child behavior checklist (CBCL) were assessed and com-pared with the control group. Results Signiifcant differences in emotional index were found between ADHD and healthy chil-dren, including bad body composition, short arms, long arms, big ifgure, omission of hands and omission of feet (P<0.05). Nega-tive correlation was found between the HFDs emotional index and the factors of activity and social ability in the CBCL (P<0.05), but a positive correlation was found between the HFDs emotional index and behavioral problem (P<0.05). Conclusion Human ifgure drawings can relfect some emotional characteristics of children with ADHD, and when combined with CBCL, it can pro-vide evidence for diagnosis and intervention for ADHD.
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ObjectiveTo discuss application effects and student role of the self-service teaching model in biochemistry theory teaching.MethodsThe clinical students of Grade 2008 were divided into the experimental group ( 190 person ) and the control group ( 181 person ) at random.The traditional teaching model was used in the control group and self-service teaching model was adopted in the experimental group.The teaching effect was compared by the questionnaire and terminal examinations.Results The experimental group was significantly higher than the control group in average scores.Students were satisfied with the teaching effect.ConclusionThe self-service teaching method is superior compared with the traditional teaching,and the self-service teaching model can improve the teaching quality of biochemistry.
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BACKGROUND: Long term taking cyclosporin A(CsA)can inhibit osteoblastic differentiation and induce osteoporosis.Equol,which has greater binding affinity to estrogen receptors,can stimulate the proliferation and osteoblastic differentiation.OBJECTIVE: To investigate whether equol may protect against the proliferation and osteoblastic differentiation inhibited by CsA in mouse bone marrow mesenchymal stem cells(BMSCs)cultures and analyze signal pathway of protection.METHODS: Primary mouse BMSCs were cultured by using attachment method and assigned to five groups,which respectively treated with equol or/and CsA in the presence or absence of ICI182780,an estrogen receptor antagonist,and Nω-nitro-L-arginine methyl ester.Under an inverted microscope,morphological changes and mineralization ability of BMSCs were observed.The cell proliferation was measured by[3H]-thymidine incorporation.The osteoblastic differentiation and mineralization of extracellular matrix in BMSCs was assessed by measuring alkaline phosphatase activity and calcium deposition,respectively.Nitric oxide production in the conditioned media and cyclic guanosine monophosphata(cGMP)content in BMSCs were determined by using commercial nitric oxide and cGMP kit,respectively.RESULTS AND CONCLUSION: Equol reversed the decreased[3H]thymidine incorporation(P < 0.05),alkaline phosphatase activity(P < 0.05)and calcium deposition(P < 0.01)of CsA,which was accompanied with the changes of nitric oxide production(P < 0.01)and cGMP content(P < 0.01).The group by co-treatment with equol and CsA possessed higher cells growth density and small mineralized nodes than CsA group on day 12 under an inverted microscope.Moreover,the equol-reversed effect was abolished by ICI182780 and Nω-nitro-L-arginine methyl ester.These indicated that equol can reverse the inhibition of CsA on the proliferation and osteoblastic differentiation of mouse BMSCs through estrogen receptor/nitric oxide/cGMP signal pathway.
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<p><b>BACKGROUND</b>It has been known that vascular endothelial growth factor (VEGF) and its receptor (VEGFR2) play important roles in tumor angiogenesis. The aim of this study is to investigate whether an oral DNA vaccine against VEGFR2 has the inhibition effect on tumor growth and angiogenesis, and explore its mechanism in vivo.</p><p><b>METHODS</b>C57BL/6 mice were respectively given the DNA vaccine encoding VEGFR2 (vaccine group), pcDNA3.1 (plasmid group) and saline (saline group). All the mice were then inoculated with Lewis lung carcinoma 3LL cells. Weight, size and microvessel density (MVD) of transplanted tumors were observed. The levels of CD3+ and CD8+ T cells in peripheral blood of mice were detected by flow cytometry.</p><p><b>RESULTS</b>Weight of transplanted tumors in vaccine group was significantly smaller than those in plasmid and saline groups (P < 0.05), and MVD was significantly lower in vaccine group than that in plasmid and saline groups (P < 0.05). After inoculated with 3LL cells, CD3+ and CD8+ T cell levels of vaccine group were markedly higher than those of plasmid and saline groups (P < 0.05).</p><p><b>CONCLUSIONS</b>The oral DNA vaccine can significantly inhibit angiogenesis and growth of transplanted tumor in mice. It may act through killing endothelial cells of tumor.</p>