Objective To study the clinical manifestations and influencing prognostic factors of children with acute paraquat in-toxication ,and to search for reasonable and effective treatments .Methods Retrospectively analyzed the clinical data of 68 children with acute paraquat intoxication from March 2005 to June 2012 .According to the amount of toxic dose and clinical symptoms ,all of them were divided into 3 groups ,mild type(22 cases) ,severe type(26 cases) and fulminant type(14 cases) ,retrospective analysis on clinical manifestation ,auxiliary examination and prognosis among the groups and following up the survival of these patients ,the risk factors which may affect the prognosis were explored .Results 66 cases were poisoned by taking orally and the other 2 cases were poisoned by the skin absorption .Gastrointestinal symptoms were the most common .Among 68 cases ,6 cases was lost the following up ,20 cases died(32 .26% mortality):all children from mild type survived ;8 patients from severe type and 12 patients from fulmi-nant type(30 .77% ,85 .71% ,mortality respectively ) .As the degree of the clinical classification deteriorated ,the mortality in-creased ,there was statistical signification between each other and so did the blood urea nitrogen and serum creatinine (P<0 .05) .By following up ,children who once passed the acute stage can recovery and the pulmonary fibrosis might be reversed by the chest CT follow-up .The logistic regression analysis indicated that children who had been diagnosed with acute kidney injury and multiple or-gan dysfunction syndrome showed the worse prognosis .Conclusion Acute kidney injury is a very important factor for the short term prognosis of paraquat intoxication ,while pulmonary fibrosis determine the long-term outcomes ,lung injury may be reversed in the course of the disease ,so we should take active treatments .

We isolated a high efficient antifungal strain A02 from forest soil in a suburb of Beijing. The result of polyphasic taxonomy confirmed that strain A02 belongs to Streptomyces lydicus. The fermented broth of the strain presented a stable and strong inhibiting activity against many plant pathogenic fungi. The purpose of this study was to ascertain the substance base of the antifungal activity of strain A02. We extracted the antifungal metabolite of A02 by using column chromatography with X-5 macroporous resin and 100-200 mesh silica gel respectively, and then purified it by LC-9101 recycling preparative HPLC with a SP-120-15 column (JAIGEL-ODS-AP). An active compound with purity over 99.845% was finally obtained. The chemical structure of the active compound was determined with spectroscopy methods, including ultraviolet spectrometry, infrared spectrometry, high resolution mass spectrometry and nuclear magnetic resonance. According to the analysis results, we identified the active compound as a tetraene macrolide antibiotic with the molecular weight of 665, the molecular formula C33H47No3 and the same chemical structure as natamycin. Our research revealed a new biosynthetic function for S. lydicus to produce natamycin, and an expanding application field for natamycin to be used for the control of fungal plant diseases.
Antifungal Agents ; chemistry ; isolation & purification ; Natamycin ; analogs & derivatives ; Soil Microbiology ; Streptomyces ; chemistry ; isolation & purification ; metabolism

Objective To evaluate the therapeutic effect of Huangqin Decoction(HQD)on ulcerative colitis(UC)in mice and explore its mechanism.Methods Male Balb/c mice were randomly divided into normal control group,model group,mesalazine group(5-ASA,200 mg/kg),and low-,medium-and high-dose HQD groups(2.275,4.55 and 9.1 g/kg,respectively).With the exception of those in the normal control group,all the mice were exposed to 3%DSS solution in drinking water for 7 days to establish UC models.After treatment with the indicated drugs,the mice were assessed for colon injury and apoptosis using HE,AB-PAS and TUNEL staining,and the expression levels of inflammatory factors were detected with ELISA.Western blotting,immunohistochemistry and qRT-PCR were used to detect the changes in protein expressions associated with the intestinal chemical barrier,mechanical barrier and endoplasmic reticulum stress(ERS).Results HQD treatment significantly reduced DAI score and macro score of UC mice,decreased colonic epithelial cell apoptosis,lowered expressions of IL-6,TNF-α,IL-1β and IL-8,and enhanced the expressions of MUC2 and TFF3.HQD treatment also upregulated the protein expressions of claudin-1,occludin and E-cadherin,reduced the expressions of GRP78,CHOP,caspase-12 and caspase-3,decreased the phosphorylation levels of PERK,eIF2α and IRE1α,and increased the Bcl-2/Bax ratio in the colon tissues of UC mice.Conclusion HQD inhibits colonic epithelial cell apoptosis and improves intestinal barrier function in UC mice possibly by reducing ERS mediated by the PERK and IRE1α signaling pathways.

Objective To evaluate the therapeutic effect of Huangqin Decoction(HQD)on ulcerative colitis(UC)in mice and explore its mechanism.Methods Male Balb/c mice were randomly divided into normal control group,model group,mesalazine group(5-ASA,200 mg/kg),and low-,medium-and high-dose HQD groups(2.275,4.55 and 9.1 g/kg,respectively).With the exception of those in the normal control group,all the mice were exposed to 3%DSS solution in drinking water for 7 days to establish UC models.After treatment with the indicated drugs,the mice were assessed for colon injury and apoptosis using HE,AB-PAS and TUNEL staining,and the expression levels of inflammatory factors were detected with ELISA.Western blotting,immunohistochemistry and qRT-PCR were used to detect the changes in protein expressions associated with the intestinal chemical barrier,mechanical barrier and endoplasmic reticulum stress(ERS).Results HQD treatment significantly reduced DAI score and macro score of UC mice,decreased colonic epithelial cell apoptosis,lowered expressions of IL-6,TNF-α,IL-1β and IL-8,and enhanced the expressions of MUC2 and TFF3.HQD treatment also upregulated the protein expressions of claudin-1,occludin and E-cadherin,reduced the expressions of GRP78,CHOP,caspase-12 and caspase-3,decreased the phosphorylation levels of PERK,eIF2α and IRE1α,and increased the Bcl-2/Bax ratio in the colon tissues of UC mice.Conclusion HQD inhibits colonic epithelial cell apoptosis and improves intestinal barrier function in UC mice possibly by reducing ERS mediated by the PERK and IRE1α signaling pathways.