Modified Fired Glycyrrhizae Decoction as adjunct therapy on the hemodynamics and myocardial enzymes of the patients with coronary arrhythmia after bifurcation lesion surgery / 国际中医中药杂志

Objective:To explore the effects of modified Fired Glycyrrhizae Decoction on hemodynamics and levels of myocardial enzymes in coronary arrhythmia (CA) after bifurcation lesion (BCL) surgery.Methods:According to simple random method, 100 patients with CA after BCL surgery in the hospital who met the inclusion criteria were divided into two groups between May 2019 and May 2021, 50 in each group. The control group was treated with intravenous drip of amiodarone and routine treatment, while the observation group was treated with modified Fired Glycyrrhizae Decoction on basis of control group. Both groups were treated for 2 weeks. Before and after treatment, TCM syndromes were scored. The quality of life was assessed by World Health Organization Quality of Life Scale (WHOOLQ-100). The plasma or serum specific viscosity, fibrinogen and ESR were detected by non-invasive hemodynamic detector. The levels of cardiac troponin (cTnT), creatine kinase (CK) and brain natriuretic peptide (BNP) were detected by ELISA. The disappearance time of symptoms was observed. The adverse reactions were recorded. And the clinical responsive effect was evaluated.Results:The difference in total response rate between observation group and control group was not statistically significant [92.0% (46/50) vs. 90.0% (45/50); χ2=0.12, P=0.727]. After treatment, scores of fluster and shortness of breath, panic and irritability, and mental fatigue in the observation group were significantly lower than those in the control group ( t=7.38, 9.88, 4.87, P<0.01), and scores of physical function, independence and social relations were significantly higher than those in the control group ( t=8.69, 6.32, 5.76, P<0.01). After treatment, levels of plasma specific viscosity, fibrinogen and ESR in the observation group were significantly lower than those in the control group ( t=13.59, 8.30, 8.80, P<0.01). After treatment, levels of serum cTnT [(33.45±3.44) mg/L vs. ( 39.71±4.02) mg/L, t=8.37], CK [(70.49±7.32) U/L vs. (82.15±8.41) U/L, t=7.40] and BNP [(223.41±20.36) ng/L vs. (244.58±20.74) ng/L, t=5.15] in the observation group were significantly lower than those in the control group ( P<0.01). The disappearance time of palpitation, chest tightness and dizziness in the observation group was significantly earlier than those in the control group ( t=10.44, 11.91, 5.75, P<0.01). During treatment, differences in incidence of adverse reactions between observation group and control group was statistically significant [4.0% (2/50) vs. 32.0% (16/50); χ2=4.00, P=0.046]. Conclusion:The modified Fired Glycyrrhizae Decoction combined with routine western medicine can improve clinical symptoms, hemodynamics and levels of myocardial enzymes in CA patients after BCL surgery, and improve the clinical curative effect.

Synthesis of poly asparagine derivatives and its cytotoxicity study / 天津医药

Objective To synthesize poly asparagine derivatives and to evaluate its safety at the cellular level, which provide research platform for its potential application as drug carrier. Methods Polysuccinimide was synthesized by ther?mal polymerization of L-polyaspartic acid, and the target product of PSI-Phe-EA was obtained by the ring-opening reaction of polysuccinimide using L-phenylalanine methyl ester hydrochloride and ethanol amine. The structure of PSI-Phe-EA were characterized by 1H NMR. The rate of ring-opening of PSI was calculated by internal standard method of 1H NMR. The change of hydrophilicity was studied by the comparison of solubility. The cytotoxicity and morphology modification by PSI-Phe-EA at designate concentrations was investigated by MTT method and inverted microscopy respectively. The effects on cell cycles were analyzed by flow cytometry after propidium iodide (PI) staining. Results 1H NMR results confirmed the structure of PSI-Phe-EA and the ring-openning rate of PSI was 40%. The hydrophilicity of PSI-Phe-EA was greatly in?creased upon ring opening using ethanol amine. MTT test showed that the cell survival rates of NIH 3T3 and HepG2 cells were higher than 80%under the examined concentration (<100 mg/L). Inverted microscopy showed that 50 mg/L of PSI-Phe-EA treatment had no adverse effects on cell morphology. Cell cycle analysis indicated that PSI-Phe-EA treatment had no in?fluence on cell cycles of NIH 3T3 and HepG2 cell lines. Conclusion PSI-Phe-EA showed high hydrophilicity without sig?nificant effects on the cells survival, cells morphology and cell cycles. It is a kind of safe polymer material.

Synthesis and biocompatibility of ethynylated open ring derivatives of polyasparamide / 中国生化药物杂志

Objective To synthesize a new ethynylated open ring derivatives of polyasparamide as functional drug carrier.Methods L-phenylalanine methyl ester hydrochloride was prepared using L-phenylalanine and then was used for ring opening reaction of polysuccinimide.To synthesize the target product of PSI-Phe-OMe-PA, the obtained polyasparamide-g-phenylalanine derivatives ( PSI-Phe-OMe) was further ring opened by propargylamine.The structure of PSI-Phe-OMe-PA was confirmed by 1 H NMR.The biocompatibility of PSI-Phe-OMe-PA was evaluated by MTT method, inverted microscope observation and cell cycles analysis ( propidium iodide staining ) .Results The ring-opening rate of polyasparamide by L-phenylalanine methyl ester and propargylamine was 40%and 100%, respectively.All results of biocompatibility studies indicated that PSI-Phe-OMe-PA may be a good candidate for functional drug carrier.Conclusion Based on the ring-opening capability of amino-group and the specificity of click reaction, L-phenylalanine methyl ester hydrochloride and propargylamine were used successively to react with polyasparamide.PSI-Phe-OMe-PA is a biocompatible functional drug carrier.

A genome-wide RNAi screen identifies genes regulating the formation of P bodies in C. elegans and their functions in NMD and RNAi

Cytoplasmic processing bodies, termed P bodies, are involved in diverse post-transcriptional processes including mRNA decay, nonsense-mediated RNA decay (NMD), RNAi, miRNA-mediated translational repression and storage of translationally silenced mRNAs. Regulation of the formation of P bodies in the context of multicellular organisms is poorly understood. Here we describe a systematic RNAi screen in C. elegans that identified 224 genes with diverse cellular functions whose inactivations result in a dramatic increase in the number of P bodies. 83 of these genes form a complex functional interaction network regulating NMD. We demonstrate that NMD interfaces with many cellular processes including translation, ubiquitin-mediated protein degradation, intracellular trafficking and cytoskeleton structure.We also uncover an extensive link between translation and RNAi, with different steps in protein synthesis appearing to have distinct effects on RNAi efficiency. Moreover, the intracellular vesicular trafficking network plays an important role in the regulation of RNAi. A subset of genes enhancing P body formation also regulate the formation of stress granules in C. elegans. Our study offers insights into the cellular mechanisms that regulate the formation of P bodies and also provides a framework for system-level understanding of NMD and RNAi in the context of the development of multicellular organisms.