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Articles by Xiaoyu Wang
Total Records ( 4 ) for Xiaoyu Wang
  Duoyao Cao , Xiaoqi Jing , Xiaoyu Wang , Hui Liu and Dekun Chen
  Staphylococcus aureus is one of the major pathogen which can cause mastitis in dairy animal. CD4+ lymphocytes play a significant role in clearing this type of bacteria. To our knowledge, CD4+ lymphocytes change in mouse model of S. aureus mastitis is poorly understood. To investigate the response of CD4+ lymphocytes in mammary gland, the mice mastitis was induced with S. aureus in this study. New protocol was used to separate lymphocytes in mammary gland. The results showed that CD4+ lymphocytes increased significantly comparing with blank and saline mice (p = 0.0019, p<0.01) at 72 h post Intramammary Inoculation (IMI). At the same time, the infection mice mammary gland tissues were swelled and were suffering from hyperemia. From histological observation, massive inflammatory cells are infiltrated in the tissue. The results suggest that CD4+ lymphocyte is one of important cells in against S. aureus infection in mammary gland.
  Xiaoqi Jing , Duoyao Cao , Hui Liu , Xiaoyu Wang , Xuanduo Zhao and Dekun Chen
  Staphylococcus aureus is a contagious, mastitis-causing pathogen that is highly adapted to survive in mammary gland. This study focuses on γδ T cell populations in mammary gland involved in the immune response against S. aureus. The C57BL/6J mice in 10-15th day of lactation were intramammary challenge with S. aureus isolated from goat chronic mastitis or with PBS (control). γδ T1(interferon (IFN)-γ-producing) cells and γδ T17 (interleukin (IL)-17-producing) cells in the mammary gland during infection were evaluated by cytometry. The results showed that the percentage of γδ T1 in γδ T cells decreased following intramammary injection and significance was observed at 8, 36, 48, 60 and 72 h compared with control. At the same time, expression of IFN-γ mRNA was decreased. However, percentage of γδ T17 in γδ T cells was increased significantly at 18, 48 and 60 h post challenge, accompanied by an increase in the expression folds of IL-17, IL-23p19 and CCR6 mRNA following intramammary injection. Overall, these data suggest that γδ T17 cells, not γδ T1 cells, in mammary gland tissue were activated rapidly and played an important role in mediating mammary inflammation caused by S. aureus.
  Desheng Li , Lei Chen , Chengdong Wang , Hongbo Dai , Mengliang Liu , Ling Zhu , Xiaoyu Wang , Zhiwen Xu , Wanzhu Guo and Heng Min Cui
  The nasal bacterial flora of seven giant pandas was identified by 16S ribosomal RNA (rRNA) gene sequencing analysis. The most widely occurring species were Staphylococcus and Escherichia coli. Several species not known to be associated with giant pandas were present in the study including Pantoea agglomerans, Corynebacterium auriscanis, Kurthia gibsonii and Corynebacterium glutamicum.
  Juan Wang , Fulan He , Xiaoyu Wang , Lihong Tian and Ziying Li
  A uranium coordination compound with pyridine-2,6-dicarboxylic acid in deionized water has been synthesized and characterized by IR, UV, XPS, and X-ray single-crystal diffraction. The crystal belongs to the monoclinic system, space group C2/c with a = 1.8427(4) nm, b = 0.6886(16) nm, c = 1.5442(4) nm, α = 90°, β = 94.082(2)°, γ = 90°, Z = 4, and V = 1.9544(8) nm3. The structure shows an eight-coordinate uranium forming a hexagonal bi-pyramidal 3-D geometry with pyridine-2,6-dicarboxylate as building units. Fluorescent studies show several strong emissions. Cyclic voltammetric measurement of the compound reveals that uranium(VI) is reduced irreversibly at E 1/2 = 927 mV with ΔE p = 77 mV, E 1/2 = -289 mV with ΔE p = 113 mV. The electron transfer number (n) involved in reduction processes could be calculated to be approximately two and one, which corresponded to the unusual U(VI)/U(IV) and U(IV)/U(III) couples.
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