Pu Xiuying

Cistanche polysaccharide (CDPS)/polylactic acid (PLA) scaffolds based coaxial electrospinning for vascular tissue engineering

ABSTRACT High rate of platelet adhesion and limited biocompatibility were regarded as the chief weaknesses of vascular tissue engineering scaffolds. The objective of this research was to overcome these drawbacks by ultilizing coaxial electrospinning to combine CDPS with PLA. CDPS and PLA were located at the inner and external layer respectively so that a “core-sheath” structure was formed. The properties of scaffolds were tested by methods such as mechanical testing, MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide] assay and subcutaneous transplantation. Compared to natural tissues, CDPS/PLA coaxial scaffolds showed excellent biomechanic properties and hemocompatibility so that CDPS owned good potentiality in vascular tissue engineering. GRAPHICAL ABSTRACT

Deferring senile effect of polysaccharides from Angelica and Astragalus on aging mice

Angelica and Astragalus, Chinese herbal medicine, are used as immunostimulants for enriching the blood, anti-tumor and antioxidation effects. However, the synergistic mechanisms of antioxidant effect have long been the object of intensive study. We investigated the deferring senile effect of AAP on aging mice by determination of the contents of monoamine oxidase (MAO) in brain, hydroxyproline (Hyp) in skin, hydrogen peroxide (H2O2) in serum, glutathione peroxidase (GSH-PX) and xanthine oxidase (XOD) in liver tissue and immunity organs index. The obtained results showed that AAP decreased significantly the content of MAO and H2O2, and enhanced the concentrations of Hyp, GSH-PX and XOD in vivo. No significant differences were found when compared with those of vitamin E. Additionally, AAP could increase immunity organs index. These results demonstrated that AAP had significant deferring senile effect on the aging mice. These changes may be the important mechanisms to prevent mice from aging.