RESUMEN
Objective To explore whether astragaloside IV (AS-IV) can protect radiation-induced kidney injury through toll-like receptor 4 (TLR4)/nuclear factor kappa B (NF-κB)-mediated signaling pathway. Methods The mice were randomly divided into normal control group, DMSO solvent group, irradiation group (IR), IR + AS-IV 20 mg/kg group and IR + AS-IV 40 mg/kg group. One month after intraperitoneal injection of AS-IV, the mice were irradiated with 8 Gy 60Coγ and to the content of serum creatinine (Cr) and uric acid (BUA) in serum were determined, HE and immunohistochemical staining, and expression of TLR4/NF-κB signaling pathway related protein in kidney were performed. Results Compared with the control group, the levels of Cr and BUA in the serum of the radiation group increased significantly (P<0.001), glomerular atrophy and tubular expansion, TLR4 and myeloid differentiation factor 88(MyD88) positive expression increased significantly (P< 0.001), and the expression of TLR4/NF-κB signaling pathway-related proteins[ TLR4, MyD88, NF-κB, interleukin-1 β (IL-Iβ), tumor necrosis factor α (TNF-α)] increased significantly (P< 0.01); AS-IV pretreatment can reduce the content of Cr and BUA in serum (P<0.05, P<0.01 or P<0.001), significantly improve the pathological response caused by radiation, and reduce the expression of TLR4/NF-κB signaling pathway-related proteins (P<0.05 or P<0.01). Conclusion AS-IV may down-regulate the release of inflammatory factors through the TLR4/NF-κB signaling pathway, thereby improving radiation-induced kidney injury in mice and playing a protective role.
RESUMEN
Traditional Chinese medicine(TCM) is the treasure of our culture, and TCM theory is the core of traditional Chinese medicine. Many of its concepts can be unified and balanced with modern functional food ideas. Even in ancient days, people had already found that medicine and food have the same source. Nowadays, homology between drug and food has been accepted widely. Astragali Radix and some other herbs have been used both as food and medicine, with a variety of bio-active substances, so such herbs can be used as characteristics resources to be developed into functional food. It's a combination of traditional medicine and modern ideas. Flavonoids, polysaccharides and saponins, the main compositions of Astragali Radix, can keep intestinal microenvironment homeostasis and human health by influencing the population structure, metabolism and intestinal cell function of intestinal flora. On the other hand, intestinal flora is also involved in the absorption, metabolism, transformation and other steps of these active ingredients in the body, which has an impact on their effectiveness and improves their bioavailability, playing an essential role in the relevant mechanism of their effectiveness. In this paper, we summarize the interaction between the above three functional ingredients in Astragali Radix and intestinal flora, sum up the interaction between these three functional ingredients of other homologous drugs and intestinal flora, provide a theoretical basis for the mechanism and application of functional food materials, and propose some suggestions and prospects for their future development.