Effect of Naoshuming decoction on expression of NF-κB, TNF-α, and IL-1β in focal cerebral ischemia rats / 中南大学学报(医学版)

To explore the effect of Naoshuming decoction on cerebral ischemic rats.
 Methods: The model of cerebral ischemia in rats was established via middle cerebral artery occlusion (MCAO). The MCAO model rats were randomly divided into a model group (n=36), a Naoshuming decoction at high dose group (n=36), a Naoshuming decoction at middle dose group (n=36) and a Naoshuming decoction at low dose group (n=36). In addition, a normal group (n=12) and a sham operation group (n=12) were included. Rats in each group were killed on the 3rd, 7th, and 14th day to detect relevant indicators. The Ayelet Levy 14 method was used to score the neurological function. Immunohistochemical method was used to detect the protein expression of nuclear factor kappa-B (NF-κB)/p50, NF-κB/p65, tumor necrosis factor-α (TNF-α), and IL-1β. The quantitative real-time PCR were used to detect the mRNA expression of NF-κB, TNF-α and IL-1β. 
 Results: Compared with the sham group, at each time point, the inflammation indexes in the model group and different dose of Naoshuming decoction groups were significantly enhanced, and all of them showed neurological dysfunction. But the inflammatory indexes and neurological function scores would were gradually improved with the pass of time. Compared with the model group, the neurological dysfunction, the protein levels of NF-κB/p50, NF-κB/p65, TNF-α and IL-1β, and the mRNA of NF-κB, TNF-α and IL-1β in the high, middle and low dose of Naoshuming decoction groups were reduced at 3, 7 and 14 d, with statistical difference (all P<0.05 or P<0.01). 
 Conclusion: Naoshuming decoction can alleviate the cerebral ischemic injury in rats.

Preparation of multifunctional nanoscaled red blood cells drug delivery system and its photothermal and photodynamic effects / 国际生物医学工程杂志

Objective To prepare a red blood cells based multifunctional nanoscaled drug delivery system,and to study its in vitro photothermal and photodynamic effects.Methods The indocyanine green (ICG)/doxorubicin (DOX) co-loaded nanoscaled red blood cells (DIRAs) were prepared using an extrusion method.The morphology,particle size,encapsulation efficiency,and stability were determined.The heating related change of particle size was studied using a size and potential tester.The in vitro photothermal effect was studied using an infrared imaging device.The uptake of DIRAs to 4T1 cells was studied using a CLSM examination.The in vitro photodynamic effect was studied using a fluorescence probe and CLSM examination.Results DIRAs were successfully prepared with a uniform and homogeneous size which was about (97.0±20.1) nm.The Zeta potential was about-21.6 mV and the encapsulation efficiency of ICG and DOX were 93.5％ and 95.2％,respectively.The DIRAs had excellent stability within 28 days.This nanoscaled drug delivery system had identical photothermal effect compared to free ICG.The cellular uptake of DOX was significantly improved after the laser irradiation and the photodynamic effect was enhanced.Conclusions The prepared DIRAs have regular shape,suitable particle size,high encapsulation efficiency and high photothermal conversion efficiency.DIRAs can improve the cellular uptake of DOX and enhance the photodynamic efficiency.This biomimetic muhifunctional nano-system could facilitate breast cancer treatment by combining PTT7PDT and chemotherapy.