RESUMO
Diabetic nephropathy （DN） is among the common microvascular complications of diabetes. In recent years， the incidence has been on the rise with the increase in prevalence of diabetes， threatening the health of human. The early stage of DN is characterized by excessive accumulation of extracellular matrix （ECM） and thickening of glomerular basement membrane which result in glomerular mesangial proliferation and massive collagen deposition. The late stage features glomerular sclerosis and renal fibrosis （RF）. It has been confirmed that RF is the key pathological process for the development of DN. Therefore， it is the research focus to explore the pathogenesis and treatment methods of RF. It has been frequently verified that Chinese medicine is superior in the treatment of diabetic RF. It relieves diabetic RF by regulating transforming growth factor-β （TGF-β）， secretory glycoprotein （Wnt）/β-catenin， nuclear factor-κB （NF-κB）， Notch， mitogen-activated protein kinase （MAPK）， and other signaling pathways. Therefore， this paper reviews the pathogenesis of diabetic RF and the treatment with Chinese medicine， which is expected to serve as a reference for clinical application of Chinese medicine in the treatment of diabetic RF.
RESUMO
Objective: To optimize the preparation technology of colon-specific chitosan microspheres of rhubarb total anthraquinones (RTA-CMS). Methods: With chitosan as material, RTA was made into microspheres. According to the entrapment efficiency (EE) and particle diameter, the best preparation technology was selected using orthogonal design. The enteric material Eudragit S100 was used to coat the CMS. Results: The best preparation technology was as follows: The concentration of chitosan was 2.5%; The mass ratio of RTA and chitosan was 1:4; The ratio of paraffin and dichloromethane was 1:1; The amount of span-80 was 2%. The EE of CMS was 64.5%. The particle diameter of the CMS was (248.8 ± 54.2) μm, and the mean diameter was (269.3 ± 172.7) μm after coating. Conclusion: RTA-CMS prepared with the best preparation technology has a high EE. And the microspheres form is good. The technology could be used to prepare colon-specific RTA-CMS.