枳■子黄酮类成分研究

从北枳（ＨｏｖｅｎｉａｄｕｌｃｉｓＴｈｕｎｂ）种子中首次分离并鉴定了４个黄酮类化合物，即双氢山奈酚（ｄｉｈｙｄｒｏｋａｅｍｐｆｅｒｏｌＩ）、槲皮素（ｑｕｅｒｃｅｔｉｎＩＩ）、（＋）３，３′，５′，５，７五羟基双氢黄酮［（＋）３，３′，５′，５，７ｐｅｎｔａｈｙｄｒｏｆｌａｖａｎｏｎｅＩＩ］和（＋）双氢杨梅黄素［（＋）ｄｉｈｙｄｒｏｍｙｒｉｃｅｔｉｎＩＶ］。其中ＩＩ为新化合物，Ｉ和ＩＶ为首次从该属植物中分到。     

鼓槌石斛化学成分的研究

自中药鼓槌石斛(Dendrobium chrysotoxum Lindl.)茎中分离到5个化合物,经光谱(UV,IR,MS,¹HNMR,DIFNOE和¹³CNMR)分析,分别鉴定为β-谷甾醇(I)、鼓槌菲(chrysotoxene,II)、毛兰素(erianin,III)、毛兰菲(confusarin,IV)和鼓槌联苄(chrysotobibenzyl,V)。II是新化合物,V是新天然产物。     

Prevalence of Usutu and West Nile virus antibodies in human sera,Modena, Italy, 2012

A collection of 3069 human sera collected in the area of the municipality of Modena, Emilia Romagna, Italy, was retrospectively investigated for specific antibodies against Usutu (USUV) and West Nile viruses (WNV). All the samples resulting positive using a preliminary screening test were analyzed with the plaque reduction neutralization test. Overall, 24 sera were confirmed as positive for USUV (0.78%) and 13 for WNV (0.42%). The results suggest that in 2012, USUV was circulating more than WNV in North‐eastern Italy.     

Reduction of CpG-induced arthritis by suppressive oligodeoxynucleotides

OBJECTIVE: Bacterial DNA contains immunostimulatory CpG motifs that cause inflammation when injected into the knee joints of normal mice. We examined whether synthetic oligodeoxynucleotides (ODN) that suppress CpG-induced immune responses prevent CpG-induced arthritis. METHODS: CpG, suppressive, and/or control ODN were injected into the knees of BALB/c mice. Joint swelling and inflammation were evaluated by physical measurement, by histologic analysis of joint tissue, and by magnetic resonance imaging. RESULTS: Immunostimulatory CpG DNA induced local arthritis, characterized by swelling of the knee joints, the presence of inflammatory cell infiltrates, the perivascular accumulation of mononuclear cells, and hyperplasia of the synovial lining. Administering suppressive (but not control) ODN reduced the manifestations and severity of arthritis up to 80%. CONCLUSION: Suppressive ODN may be useful for the prevention or treatment of arthritis induced by bacterial DNA.