Conventional chemotherapy drugs, molecularly targeted drugs, and immune checkpoint inhibitors are the major constituents of anti-tumor drugs in clinical settings at present. Molecularly targeted drugs specifically target the key proteins, genes, or signal transduction pathways in tumor cells which are essential for initiation and development of tumor, resulting in selective activity to induce cell death or growth inhibition. Molecularly targeted drugs have emerged as the mainstream in the research and development of anti-tumor drugs due to its high selectivity and low toxicity. Natural products refer to the chemical constituents or metabolites originated animals, plants, or microorganisms, which have been recognized as one of the important sources of drug discovery with abundant resources and diversified structures. At present, a number of molecularly targeted anti-tumor drugs derived from natural products or their derivatives have been approved for cancer therapy or in clinical trials. This review will summarize the molecularly targeted anti-tumor drugs derived from natural products or their derivatives according to their different cellular targets, and also outline the molecular mechanism, progress, and perspectives of these drugs.

The most common forms of treatment for amblyopia are occlusion therapy and pharmacologic penalization. But these methods can not recover all the visual deficits of amblyopes and there are some disadvantages of the treatment which need to be considered, including adverse effects, compliance and social stigma. Recently, some novel approaches are investigated for improving the effectiveness and compliance of treatment for amblyopia.

In order to explore the dormancy physiological and biochemical mechanism of Paris seeds, the seed embryo growth courses, and the dynamic change of 5 enzymes, include SOD, POD, CAT, MDH, G-6-PDH were measured during variable temperature stratification. The results indicated that Paris seeds embryo grew quickly after 40 d in warm-stratification (18 ± 1) °C, at the meantime the metabolic activity was significantly strengthened. These facts showed that Paris seeds turned into physiological after-ripening process. After 60-80 d, the morphological embryo after-ripping process basically completed, and the following cold-stratification (4 ± 1) °C furthered Paris seed to finish physiological after-ripening. After 40 d, the activity of MDH decreased while G-6-PDH increased significantly. This showed that the main respiratory pathway of seed changed from TCA to PPP, which benifited breaking seed dormancy. In the whole period of stratification process, the activity variation of SOD and CAT was insignificantly and the activity of POD was enhanced significantly after shifting the seed in cold stratification process. This showed that SOD, CAT had no direct effects on breaking Paris seed dormancy but keeping the seed vigor, while the POD might involve in the process of Paris seed dormancy breaking.
Germination ; Liliaceae ; chemistry ; embryology ; enzymology ; Plant Proteins ; metabolism ; Seeds ; chemistry ; enzymology ; growth & development ; Temperature

Objective: To observe the level of pro-opiomelanocortin (POMC) mRNA expression in the hypothalamic arcuate nucleus in young and senile rats. Methods: POMC mRNA was determined with in situ hybridization, the hybridization signals and areas of POMC mRNA-positive cells were measured with computer image analysis system. Results: Compared with young rats, average gray values of POMC mRNA-positive neurons in the hypothalalmic arcuate nucleus and near region in the senile rats decreased, but the numbers of POMC mRNA-positive neurons did not change significantly. Conclusion: The decrease of POMC mRNA expression level in individual neurons in hypothalamic arcuate nucleus of senile rats is one of the causes that decrease the expression of peptides-derived from POMC gene.

Objective: To construct a prediction model for preeclampsia (PE) risk in twin-pregnant women, so as to provide the basis for early screening and prevention of PE. Methods: A total of 467 twin-pregnant women who underwent prenatal examination and delivered at Huzhou Maternal and Child Health Hospital were selected. Sixty cases with preeclampsia (PE) were included in the case group, and 60 women without PE were included in the control group. General information, blood biochemical indicators and uterine artery resistance index (UtA-RI) were collected. A logistic regression model was used to screen predictive factors and establish a nomogram. The Bootstrap method was performed for the internal validation; the receiver operating characteristic (ROC) curve, calibration curve and decision curve analysis were employed to evaluate the discrimination, calibration and clinical utility of the nomogram, respectively. Results: In the case group, there were 47 individuals (78.33%) aged younger than 35 years, 21 individuals (35.00%) with pre-pregnancy body mass index (BMI) of 25 kg/m2 and above, and 33 individuals (55.00%) with in vitro fertilization. In the control group, there were 57 individuals (95.00%) aged younger than 35 years, 8 individuals (13.33%) with pre-pregnancy BMI of 25 kg/m2 and above, and 39 individuals (65.00%) with natural pregnancy. Multivariable logistic regression analysis identified age, pre-pregnancy BMI, method of conception, placental growth factor (PLGF) and UtA-RI as risk prediction factors for PE in twin-pregnant women. The established nomogram had an area under the ROC curve of 0.827 (95%CI: 0.755-0.899), a sensitivity of 0.767, a specificity of 0.733, a good discrimination and calibration, and a relatively high clinical net benefit. Conclusion The nomogram established by age, pre-pregnancy BMI, method of conception, PLGF and UtA-RI has a good predictive value for the risk of PE in twin-pregnant women.

Radiotracer techniques were employed to characterize 65Zn adsorption and desorption in root-cell-wall of hyperaccumulating ecotype (HE) and non-hyperaccumulating ecotype (NHE) species of Sedum alfredii Hance. The results indicated that at the end ofa 30 min short time radioisotope loading period, comparable amounts of 65Zn were accumulated in the roots of the two ecotypes Sedum alfredii, whereas 2.1-fold more 65Zn remains in NHE root after 45-min desorption. At the end of 60 min uptake period, no difference of 65Zn accumulation was observed in undesorbed root-cell-wall of Sedum alfredii. However, 3.0-fold more 65Zn accumulated in desorbed root-cell-wall ofNHE. Zn2+ binding in root-cell-wall preparations of NHE was greater than that in HE under high Zn2+ concentration. All these results suggested that root-cell-wall of the two ecotypes Sedum alfredii had the same ability to adsorb Zn2+, whereas the desorption characteristics were different, and with most of 65Zn binding on root of HE being available for loading into the xylem, as a result, more 65Zn was translocated to the shoot.

Objective To evaluate the correlation of maternal FTO expression and insulin secretion levels in pregnant women.Methods In outpatient of Zhuhai Municipal Maternal and Child Healthcare Hospital,60 cases of pregnant women with gestational diabetes mellitus (GDM) and 60 cases of healthy pregnant women were recruited in this study from March 2016 to August 2016.Each pregnant woman was taken two tubes of venous blood.Lymphocytes was isolated from one tube of anticoagulated whole blood.The expression of FTO mRNA in lymphocytes was investigated using RT-PCR.Serum was isolated from another tube of non-anticoagulant whole blood.Its FTO protein was investigated using ELISA,insulin was investigated using chemiluminescence method,and GLU,CHO,TG,HDL-C and LDL-C were investigated by automatic biochemical analyzer.The correlation of the biochemical indicators were analyzed.Results The expression level of FTO mRNA,FTO protein,fasting glucose data,OGTT at 1 h and 2h glucose levels in the case group were 0.17 ％ ± 0.10 ％,61.32 ± 25.23 pg/ml,4.71 ±0.54 mmol/L,10.70±1.36 mmol/L and 8.97 ± 1.60 mmol/L respectively.The values of these biochemical indicators in control group were 0.11％±0.07％,51.47±22.97 pg/ml,4.41± 0.28 mmol/L,8.05±1.04 mmol/L and 6.56±0.75 mmol/L respectively.The differences were statistically significant (t =3.876,2.236,3.817,11.964 and 10.578,P＜0.05).The insulin levels were 6.83±9.76 mU/L in the case group,and 13.15±13.99 mU/L in control group.The differ ences was statistically significant too(t=-2.869,P＜0.05).FTO expression level was positively correlated with FTO protein,OGTT 1h glucose and OGTT 2h glucose levels (r=0.232,0.292,0.242,all P＜0.05),and it was negatively correlated with insulin levels(r=-0.185,P＜0.05).There was no correlation between FTO and fasting glucose expression levels (P ＞0.05).Conclusion The expression of FTO level in pregnant women with GDM was higher than that in healthy pregnant women.The relative expression of FTO mRNA was negatively correlated with insulin.And the regulation of glucose metabolism might be effected by insulin.

Mitochondria is an important organelle in mammalian cells with multiple functions,such as ener-gy production and cell homeostasis maintaining. It is known that hundreds of diseases are associated with mi-tochondrial defects. The studies show that the exoge-nous mitochondria can directly enter mammalian cells in vitro, and they also can quickly transform into ani-mal tissues by local or intravenous injection. Current-ly, it has raised a new therapeutic strategy for mito-chondrial diseases, called mitotherapy, which trans-plants exogenous functional mitochondria into mito-chondria-defective cells. The mitochondria in recipient cells play their own roles, including energy produc-tion,maintaining free radical balance,and cell viabili-ty recovery. Since there is no effective method for mito-chondria-related diseases up to now, the mitotherapy will provide a new approach for the prevention and treatment of these diseases.

Objective To examine the mutagenicity and antioxidant activity of Proanthocyanidin( PC). Methods Three mutagenicity tests including Ames test,bone marrow micronucleus test and sperm malformation test in mice were conducted. According to the level of erythrocyte MDA,11-month-old rats were randomly divided into five groups including blank control,solvent control and 41. 67,83. 33,250. 0 mg/kg test groups. The content of erythrocyte MDA,SOD and GSH-PX activity of each dosage group were then observed after administration of PC to test the antioxidant activity. Results In all three mutagenicity tests,no mutagenic effect was observed in any PC - treated group. Compared with two control groups,the content of erythrocyte MDA was significantly decreased in 83. 33 and 250. 0 mg/kg groups(both P<0. 05) and GSH-Px activity was significantly increased in 250 mg/kg group(P<0. 05). Conclusion PC had no mutagenic effect but showed antioxidant activity under our experimental conditions.

Objective To evaluate the situation of musculoskeletal imaging research at home and abroad and the disparity and consistency between them.Methods Statistic analysis was done with the musculoskeletal articles published in those journals during the last decade,including Chinese Journal of Radiology,Journal of Clinical Radiology,Radiology,American Journal of Roentgenology(AJR)and the British Journal of Radiology(BJR).Results The development of museuloskeletal imaging research was very imbalaneed among different areas and hospitals in China.The rate of clinical research treatise and imaging technique articles at home was 76.3%(357/468)and 10.0%(47/468),respectively,while that was 75.7%(731/966)and 10.8%(105/966),respectively abroad.The rate of MR image technique articles in China was lower than that abroad.The rate of articles on basic research at home and abroad was 5.3%(25/468)and 7.9%(76/966),respectively.The rate of articles about museuloskeletal imaging simply using CT or MR at home was 20.1%(94/468)and 29.7%(139/468),respectively,while that was 5.1%(49/966)and 60.4%(548/966),respectively abroad.The rate of articles about interventional therapy and synthetic imaging at home was 9.2%(43/468)and 29.3%(137/468),respectively,while that was 4.7%(45/966)and 22.5%(217/966),respectively abroad.With regard to the diseases category,the research focused on the bone tumors and the tumor-like disease in China,while in other countries,the research focus had been diverted to the trauma of bone and joint,and the anatomy and disease of muscle and ligament,which was unsatisfactory in China.More focus had been put on imaging anatomy, cartilage disease and osteoporosis in other countries than in China.The research on the radiation dosage the subject received in the examination,the apphcation of Micro-CT and Micro-MR to musculoskeletal imaging was developed in other countries,but it had not been reported in China.Conclusion Although great success has been achieved in the research of musculoskeletal imaging in the last decade,there is still much disparity comparing with other countries,and the research is very imbalanced among different areas and hospitals in China.We should emphasize the application of MRI to musculoskeletal system and pay more attention to the basic research and imaging anatomy research,especially the research on ligament,muscle and cartilage.