Telomeric-repeat binding factor 2 (TRF2) as an important telomere binding protein, protects telomere ends and maintains the structural and functional stability and integrity of telomeres by interacting with five other essential core proteins (POT1, TRF1,TIN2, RAP1, and TPP1) to form a complex called shelterin. An increasing number of studies have discovered the abnormal expression of TRF2 in many tumors and that TRF2 is closely related to tumor occurrence, drug resistance, and tumor angiogenesis. Here, we review the latest research findings on the structure and function of TRF2, as well as the role of TRF2 in the occurrence, development,and treatment of tumors. We hope to provide novel perspectives for the prevention and treatment of tumors.

Purpose To detect and isolate cancer stem cells ( CSC) in fresh specimens of primary and metastatic carcinoma tissues from 10 cases of colorectal cancer to study the biological functions and mechanisms of migrating cancer stem cells. Methods Suspen-sions of primary and metastatic colorectal cancer cells were labeled with antibodies CD133-PE and CD44-FITC, and then flow cytometry was used to detect and isolate the CD133-PE-positive and CD44-FITC-positive cells. Results There were certain percentages of CD133-positive and CD44-positive cells present in primary and metastatic colorectal cancer and the proportion of CSC in metastatic colorectal cancer was higher than that in primary cancer tissue (P<0.05). Conclusions There are CSC in both primary and meta-static colorectal cancer and the proportion of CSC in metastatic colorectal cancer is significantly higher than that in primary cancer tis-sue, suggesting that CSC play an important role in the metastasis of colorectal cancer.

Neoplastic stem cell (NSC),cells with stem cell properties,which out of control of proliferation properties can be formed cancer.It plays an important role in the neoplasm metastasis,and its mechanism throughout the tumorigenesis,development and prognosis.

Topical ocular medication is commonly used for eye diseases treatment.In view of low bioavailability and poor efficacy of traditional ocular preparations, the development of novel ocular drug delivery systems has become a great challenge in pharmaceutics.In recent years, nano preparations have been widely used for ocular drug delivery systems. At present, several nanocarriers, such as polymeric micelles, nanoparticles, nanosuspension, liposomes, emulsion, and dendritic polymers have been developed for ocular drug delivery.There are some other new dosage forms, such as in-situ gelling systems, implants, contact lenses, and microneedles are also under continuous research. The aim of development of these new dosage forms is to improve the drugs' ocular bioavailability and therapeutic effects.In this paper, the development in these areas in recent years are reviewed in order to provide reference for the development of new ocular drug delivery systems.

Cardiomyopathy, Dilated ; genetics ; Humans ; NAV1.5 Voltage-Gated Sodium Channel ; Sodium Channels ; genetics

Objective To study the influence of interim overload exercise on health and it's biochemical mechanism.Methods 45 Wistar rats were randomly divided to three groups(n=15):no exercises group(control,C),normal exercise group(NE,the rats ran in the animal running machines at 15 m?min-1for 5 d in one week,exercise time was 30 min?2,and rested for 10 min after ran for 30 min),overload exercise group(OE,the rats exercised 2 bouts,2 d in consecutive in one week,exercise time was 100 min?2,and they rested for 10 min after ran for 100 min).After training for 8 weeks,the rats in three groups were sacrificed and 15 biochemical indexes in blood of rats were determined.Results Compared with C and NE groups,CK,LDH,and ALT increased obviously(P

Objective To investigate the comparison of blood uric acid and bilirubin levels on patients with acute cerebral infarction and the clinical curative effect of Donhong injection.MethodsA total of 68 patients with acute cerebral infarction from our hospital neurology, according to different therapeutic methods were divided into control group and experimental group with 34 cases in each group, two groups were treated by conventional treatment, patients in the control group were treated by blood flux injection 400 mg+5% glucose injection 250 mL intravenous drip, once a day;patients in the experimental group were treated by Dan red injection 40 mL+5% glucose injection 250 mL intravenous drip, once a day,2 groups of patients were treated for 2 cycles,a cycle with 7 d.Compared the clinical efficacy, blood uric acid, bilirubin, blood homocysteine, hyperensitive C-reactive protein, serum inhibition C and adverse reactions in the two groups after treatment.ResultsCompared with the control group, the experimental group clinical total effective rate was higher after treatment (P< 0.05).Compared with the control group, the experimental group blood uric acid, blood homocysteine, hypersensitive C-reactive protein, serum inhibition C levels were lower (P< 0.05), bilirubin level was higher(P< 0.05).Adverse reactions compared between the two groups, there was no statistically significant difference.ConclusionDonhong injection in the treatment of acute cerebral infarction clinical curative effect is distinct, dacrease blood uric acid level and increase bilirubin level, improve endothelial cell damage, protect the brain tissue.

Objective To establish a bedside available risk scoring system of no-reflow in the acute stage of STEMI.Methods Data from STEMI patients treated with PCI divided into model group and validation group were analyzed.Multivariable binary logistic regression analysis was used to identify independent no-reflow predictors of the model group.Finally,a score according to the odds ratio on logistic regression analysis was designed,and then risk stratification was established,and no-reflow high-risk patients with myocardial infarction were selected.The authenticity and reliability of the logistic regression courses were validated using receiver operator characteristic curve (ROC)and Hosmer-Lemeshow goodness-of-fit.Results Multivariate logistic regression analysis demonstrated that female (OR =0.587,P =0.019),Killip class of myocardial infarction≥2 (OR =3.656,P <0.01),TIMI flow ≤2 before primary PCI (OR =0.774,P =0.013),thrombus burden score ≥4 on baseline angiography (OR =2.629,P <0.01),pain to balloon time ≥ 6 h (OR =1.485,P =0.083)were independent correlate predictors of no-reflow phenomenon in the STEMI after PCI.The risk score system demonstrated a good risk prediction in the model group with AUC of 0.716 (95%CI:0.671 -0.761)based on ROC analysis.There was no significant discrepancy between multivariate logistic regression analysis and Hosmer-Lemeshow goodness-of-fit (χ2 =1.027,P =0.994).In risk stratification,total value <2 was assigned into low risk level,and 2-5 was put into the medium risk level,and >5 was arranged into high risk level.The risk score system demonstrated a good risk prediction in the validation group with AUC of 0.891 (95%CI:0.822 -0.959)based on ROC analysis.ROC analysis in the validation group was applied to Killip class,thrombus burden,score and risk stratification in the validation group ,and the no-reflow score was more accurate,with a larger area under the curve (AUC = 0.851,95% CI:0.776 -0.927 ).Conclusions Establishment of no-reflow scoring system with STEMI patients undergoing PCI was benefit to select high risk patients with no-reflow.

Objective To investigate the effect of X-ray irradiation on neurites growth of primary hippocampal neurons in vitro.Methods Primary hippocampal neuron culture in vitro were irradiated with 0,2,4,8,10,12 Gy of X-rays.In the first day and the third day after irradiation,the cell death of primary hippocampal neurons was detected by MTT method,and the morphological changes of primary hippocampal neuronal neurites were detected with immunofluorescence staining method.Results In the first day and third day after irradiation,the cell death of hippocampal neurons increased significantly (F =123.068,43.370,P ＜0.05),but there were no significant difference among 4,8,10,and 12 Gy irradiation groups.Immunofluorescence staining showed that,in the first day after irradiation,the neurite length and total dendritic branch length (TDBL) were significantly changed (F =9.169,7.856,P ＜0.05),and in the third day after radiation,the neurite length,TDBL and total dendritic branch tip number (TDBTN) were also altered (F =23.797,6.565,6.021,P ＜ 0.05).Conclusion X-ray irradiation can inhibit the growth of neurites in the primary hippocampal neurons in vitro.

Objective:To develop a catalytic system for the asymmetric Morita-Baylis-Hillman ( MBH) reaction of conjugated ni-troalkene with activated aldehyde, and screen out the chiral catalysts with high activity and enantioselectivity. Methods: Totally 21 chiral organocatalysts were applied in the asymmetric MBH reaction ofβ-nitrostyrene with ethyl glyoxylate, and the ee value was deter-mined by chiral HPLC. The effects of temperature, solvent and substrate ratio on the catalytic reaction were investigated. Results: In the presence of cinchona alkaloid catalyst (DHQ)2AQN, β-nitrostyrene reacted with ethyl glyoxylate in toluene at 0℃ affording the MBH adduct in 60% yield with good enantioselectivity (up to 56.9% ee). Conclusion: The bis-cinchona alkaloids with aromatic bridging group are the efficient catalysts for the asymmetric MBH reaction ofβ-nitrostyrene with ethyl glyoxylate, and moderate isolated yield and enantioselectivity are obtained.