Research Progress in Competitive Purine Antagonists.

Purine, one of the nucleotides, is an important substance for the metabolism and regulation of the body. Purine plays a key role not only in the composition of coenzymes but also in the supply of energy. Since purine was artificially synthesized, it has always been an important scaffold for respiratory diseases, cardiovascular diseases, and anti- tumor and anti-viral drugs. In addition to being widely used as competitive antagonists in the treatment of diseases, purines can be used in combination with other drugs and as precursors to benefit human life. Unfortunately, few new discoveries have been made in recent years. In this article, purine drugs in the market have been classified according to their different targets. In addition, their mechanism of action and structure-activity relationship have also been introduced. This paper provides details of the signaling pathways through which purine drugs can bind to the respective receptors on the surface of cells and cause consequent reactions within the cell, which finally affect the targeted diseases. The various receptors and biological reactions involved in the signaling for respective disease targets within the cells are discussed in detail.

Design, synthesis and biological characteristics of pyrazolo[3,4-d]pyrimidine derivatives as potential VEGFR-2 inhibitors.

Aim: Several VEGFR-2 inhibitors with the structure of [3,4-d]pyrimidine and based on sorafenib were designed and synthesized. Materials & methods: Cytotoxic activity was evaluated by MTT, wound healing and clone formation assays. Cell cycle and apoptosis were analyzed by flow cytometry. Molecular simulation and western blot were also applied. Results: Among them, II-1 significantly inhibited tumor cellular activity (IC50 = 5.90 ± 0.05 µM on HepG2 cells) compared with sorafenib (IC50 = 9.05 ± 0.54 µM on HepG2 cells). Molecular docking demonstrated that II-1 and sorafenib have the same hydrogen binding. Finally, the protein expression of phosphorylated VEGFR-2 was substantially reduced after II-1 treatment. Conclusion: Compound II-1 can inhibit VEFGR-2 activation and is an effective antitumor agent in liver cancer cells.

Therapeutic effect of acupuncture combined electrical stimulation on aged patients with post‐stroke de‐pression／ / 心血管康复医学杂志

To explore therapeutic effect of acupuncture combined electrical stimulation on aged patients with post‐stroke depression .Methods : A total of 78 patients with post‐stroke depression were randomly and equally divided into routine treatment group (received health education based on routine treatment ) and combined treatment group (received acupuncture combined low‐frequency electrical stimulation based on routine treatment group ).After four‐week treatment , score of Hamilton rating scale for depression (HAMD) and therapeutic effect were compared between two groups .Results : Compared with before treatment , there was significant reduction in HAMD score in two groups after treatment ;compared with routine treatment group after treatment , there was significant reduction in HAMD score [(19.72 ± 2. 04) scores vs.(14. 94 ± 1. 86) scores] in combined treatment group , P＝0. 001 all.To‐tal effective rate of combined treatment group was significantly higher than that of routine treatment group (87.18% vs.64.1%, P＝0.018).Conclusion : Acupuncture combined low‐frequency electrical stimulation possesses significant therapeutic effect on post‐stroke depression , which is worthy of clinical application .