RESUMO
Objective @#To investigate the effect and mechanism of ARRB1 on Armillariella tabescens polysaccharides reversal of 5-fluorouracil ( 5-FU ) -induced chemotherapeutic intestinal mucosal injury．@*Methods @# Twelve ARRB1 knockout ( ARRB1 －/ － ) and wild-type ( WT) C57BL /6 mice were randomly divided into Control，Model and ATPS groups (200 mg / kg) ，respectively．5-FU (50 mg / kg) was injected intraperitoneally for 7 days to establish a model of chemotherapeutic intestinal mucosal injury．The histopathological damage of jejunum was evaluated by HE staining ; the activity of serum superoxide dismutase (SOD) and diamine oxidase (DAO) was measured by kits ; the expression of tight junction protein (TJ) markers ZO-1，Occludin，Claudin-1 and proliferation-associated protein Ki-67 was detected by immunohistochemistry．Crypt isolation and organoid culture were used to detect the growth status of small intestinal organoids. @*Results @#5-FU chemotherapy reduced body weight，aggravated histopathological damage in small intestine，decreased SOD level，TJ protein and Ki-67 protein expression，increased serum DAO level，decreased spherical structure formation rate and organoid formation rate ; compared with the model group，after ATPS treatment，WT mice recovered body weight，decreased pathological damage，increased serum SOD level，TJ protein and Ki-67 protein expression，DAO levels decreased，and the rates of spherical structure for- mation and organoid formation were significantly higher．However，ARRB1 －/ － mice failed to reverse the effect of 5- FU after ATPS treatment．@*Conclusion @#ATPS reverses 5-FU-induced intestinal mucositis through the protective effects of ARRB1 on intestinal barrier and organoid growth.
RESUMO
Objective To study the methods andfeasibility of re-entry of NAT reactive blood donors.Methods ELISA Non-Reactive(NR) and NAT Reactive(R) Blood Donors in 2012-2014 were selected and informed consent.Blood samples collected were tested:ELISA (HBsAg、Anti-HCV、Anti-HIV and Anti-TP) and NAT (HBV-DNA、HCV-RNA and HIVRNA).ELISA NR/NAT NR samples were tested by ECLA for HBsAg、HBeAg、Anti-HBs、Anti-HBc、Anti-HBe、Anti-HCV、Anti-HIV.Results 30 donors were called back,and 11 of them were ELISA NR/NAT R,which were deferred permanently.19 of them were ELISA NR/NAT NR,and the ECLA results were 89.5％ ELISA NR/NAT NR donors were Anti-HBc R and/or Anti-HBe R (12 cases Anti-HBc/Anti-HBe R、5 cases Anti-HBe R).Anti-HBc R or Anti-HBe R donors had risk of infection,which were deferred permanently.2 cases all items Non-Reactive may be eligible for re-entry.Conclusion Re-entry of NAT reactive blood donors is very necessary and meaningful,but in the view of blood safety,it is important that establish a set of safe program for Chinese.