ABSTRACT
Solenopsis invicta is a kind of invasive pest that causes serious damage to local agriculture, environment, and human health. They attack mainly with venom within stingers. Those who are allergic to the venom would suffer a systemic anaphylaxis, even fatal shock, after being stinged by these ants. Many studies reveal that their venom is mainly composed by water, insoluble alkaloids and trace proteins, within which alkaloids are the main cause of burning sensation and blisters, while allergic reactions are caused by proteins or peptides. The research progress of toxic substances in the venom of Solenopsis invicta as well as the roles and functions of each component were reviewed in this paper.
ABSTRACT
Hippo signal pathway is one of the main signal pathways regulating cell proliferation and apoptosis in multicellular animals, which plays a vital role in the maintenance of tissue homeostasis and the regulation of organ growth. Most mammals have limited regenerative potential, and recent studies have shown that Hippo signal pathway is critical in the regeneration of various tissues and organs. The role of Hippo signaling pathway in organ regeneration and the research progress of related targets were introduced, the mechanism of Hippo signaling pathway promoting regeneration analyzes were aralyzed in this review, which provide theoretical reference for the treatment of diseases related to organ regeneration.
ABSTRACT
Objective To establish the chemical synthesis of the active ingredient rosavin of Rhodiola rosea. Methods β-D-pentaacetylglucose, 1-hydroxy-2,3,4-triacetylarabinose and cinnamyl alcohol were used as starting materials. The target compound was prepared by 1-position selective of β-D-pentaacetylglucose deacetylation, glycosylation reaction, glucose 6-OH selective protection and deprotection and other 8-step reactions. Results The target product, rosavage, was successfully obtained with high yield. The structure was confirmed by ESI-MS, 1H-NMR and 13C-NMR. The protection of 6-OH with high selectivity and high yield of tert-butyldiphenyl chlorosilane played a vital role in the synthesis process,. Conclusion The synthetic route has the advantages of simple operation, high yield, and good safety.