Effect of taspine hydrochloride on KGF signal pathway in skin wound healing in rats

Purpose: To investigate the effect of taspine hydrochloride and the regulatory involvement of fibroblast growth factor (FGF) signal on skin wound healing in rats. Methods: Wound model rats were assigned to 3 groups (n = 15 each): untreated control, taspine hydrochloride high-dose treatment, and taspine hydrochloride low-dose treatment groups. Fibroblast growth factor (FGF) and keratinocyte growth factor receptor (KGFR) were determined using qPCR, while immunoblot assay was used to assess protein levels of hepatocyte growth factor (HGF), epidermal growth factor (EGF), transforming growth factor-β1 (TGF-β1), vascular endothelial growth factor (VEGF), interleukin-6 (IL-6), interleukin-8 (IL-8), tumor necrosis factor (TNF-α) and other inflammatory factors. Results: There were significantly down-regulated levels of KGF, KGFR, TGF-β1, VEGF, EGF, HGF, IL-6, IL-8 and TNF-α in control group on the first day, relative to high- and low-dose taspine hydrochloride treatment groups (p < 0.05). Wound repair took more time in control rats than in the 2 taspine HCL-treatment rats. However, healing time was significantly shorter in rats given higher level of taspine HCL (p < 0.05). Conclusion: Taspine hydrochloride down-regulates the high expression of FGF and inhibits inflammatory response in rats with skin trauma. Moreover, it accelerates skin wound healing. These findings support the clinical application of taspine hydrochloride for skin wound healing

Effect of the combination of composite skin grafting and recombinant human basic fibroblast growth factor on plastic surgery for extensive sc ars after burns

Purpose: To investigate the effect of combined use of composite skin grafting and recombinant human basic fibroblast growth factor (rh-bFGF) on plastic surgery for extensive burn scars, and its influence on wound healing and inflammatory responses in patients. Methods: Hospital records of 120 patients who underwent extensive scar plastic surgery after burns in Hanchuan People’s Hospital from February 2019 to February 2020 were retrospectively analyzed. The patients were equally assigned to study group (STG) and control group (COG), based on the order of admission. All patients received composite skin grafting surgery and post-surgery topical silver sulphadiazine cream regularly, while those in study group (STG) received additional treatment with rh-bFGF spray on the wound surfaces. Scar scores, degree of wound healing, populations of fibrocytes and capillaries, levels of vascular endothelial growth factor (VEGF) and transforming growth factor-β1 (TGF-β1), and activities of lactate dehydrogenase (LDH) and succinate dehydrogenase (SDH) were evaluated. Results: Patients in STG had significantly better scar scores, shorter mean wound healing time, higher mean degree of wound healing, higher scores on inflammatory reactions near the wounds, and higher populations of fibrocytes and capillaries, when compared with patients in COG group (p < 0.001). After surgery, there were lower levels of VEGF and TGF-β1, and lower levels of activities of LDH and SDH in STG than in COG group (p < 0.001). Conclusion: Rh-bFGF accelerates the proliferation of wound tissue, improves local microcirculation, regulates inflammatory response, and enhances wound healing in burn scar patients when used in combination with composite skin grafting. Therefore, Rh-bFGF has a potential for enhanced management of burn scars

Spin Josephson effects in Exchange coupled Anti-ferromagnets

The energy of exchange coupled antiferromagnetic insulators (AFMIs) is a periodic function of the relative in-plane orientation of the N\'{e}el vector fields. We show that this leads to oscillations in the relative magnetization of exchange coupled AFMIs separated by a thin metallic barrier. These oscillations pump a spin current ($I_{S}$) through the metallic spacer that is proportional to the rate of change of the relative in-plane orientation of the N\'{e}el vector fields. By considering spin-transfer torque induced by a spin chemical potential ($V_{S}$) at one of the interfaces, we predict non-Ohmic $I_{S}$-$V_{S}$ characteristics of AFMI exchange coupled hetero-structures, which leads to a non-local voltage across a spin-orbit coupled metallic spacer

Risk adjusted momentum strategies: A comparison between constant and dynamic volatility scaling approaches

We compare the performance of two volatility scaling methods in momentum strategies: (i) the constant volatility scaling approach of Barroso and Santa-Clara (2015), and (ii) the dynamic volatility scaling method of Daniel and Moskowitz (2016). We perform momentum strategies based on these two approaches in a diversified portfolio consisting of 55 global liquid futures contracts, and further compare these results to the time series momentum and buy-and-hold strategies. We find that the momentum strategy based on the constant volatility scaling method is the most efficient approach with an annual return of 15.3%