A simple preparative strategy was proposed for the preparation of water-soluble, bright blue-emitting carbon nanoparticles ( CNPs ) at different temperatures by hydrothermal treatment using bean curd residue as carbon source for the first time. When the temperature reaches 240 ℃, quantum yield ( QY) can be up to 15. 24%. Most importantly, such fluorescent CNPs can be served as an effective sensing platform for label-free sensitive and selective detection of Fe3+ions with a detection of limit as low as 50 nmol/L, which is nearly 2 orders of magnitude lower than the maximum level of Fe3+ions in the drinking water permitted by the European Community. These outstanding properties give promising potential for reliable detection of Fe3+ in intracellular fluid and water samples, even bioimaging and optical imaging without being hazard in the future.

This study was aimed to observe the pharmacodynamics of genistein combined with tripterygium gly-cosides ( GTW ) in the rheumatoid arthritis ( RA ) treatment of ovariectomized rats . SD rats were randomly divid-ed into four groups , which were the sham-operation group , model group , Methotrexate ( MTX ) treatment group ( 2.7 mg/kg ) , and genistein ( 30 mg/kg ) combined with GTW ( 70 mg/kg ) treatment group . There were ten rats in each group . Except the sham-operation group , rats in other groups were ovariectomized and immunized by collagen type II to prepare collagen induced arthritis ( CIA ) model . The intragastric administration of drugs was given once a day for two weeks . The arthritis index , joints swelling degree , and levels of anti-Col II , IL-6 and IL-10 in serum were tested . The results showed that the arthritis index , joints swelling degree , and levels of anti-Col II , IL-6 and IL-10 in serum were all significantly increased in the model group ( P < 0 . 05 or P< 0 . 01 ) . Compared with the model group , the arthritis index and joints swelling degree of both MTX and genistein combined with GTW were significantly decreased . The level of anti-Col II in serum of the MTX treatment group was significantly decreased ( P < 0 . 05 ) . However , there were no significant changes on levels of IL-6 and IL-10 . The levels of anti-Col II and IL-6 in serum of the genistein combined with GTW were significantly decreased ( P < 0 . 05 ) . The level of IL-10 was significantly increased ( P < 0 . 01 ) . It was conclud-ed that genistein combined with GTW can significantly inhibit the pathological progress of CIA on ovariec-tomized rats . Compared with MTX , the genistein combined with GTW received a better regulating effect on the expression of IL-6 and IL-10 . The results suggested that phytoestrogen combined with GTW played a good therapeutic effect on gonadal dysfunction type of RA . It provided novel strategies and experimental evidences on postmenopausal RA treatment in the clinical practice .

To develop a novel polyamino acid-based nanohydrogel drug delivery system for dexamethasone to enhance its delivery efficiency to the inner ear.