Colorectal cancer is currently the third most common cancer worldwide,and there are still half of the patients undergoing recurrence and metastasis after surgical treatment,so it is necessary for colorectal cancer patients to receive radiation therapy routinely.Due to the side effects brought by radiotherapy,it is of great importance to solve how to minimize the radiation dose in radiation therapy and improve radiation sensitivity.In recent years,people discovered that microRNAs can not only be involved in the origins of colorectal cancer and progress,but also play a increasingly important role in cancer radiosensitivity.MicroRNAs can regulate tumor radiosensitivity by influencing tumor microenvironment and function on target genes.DNA damage response caused by radiation includes the activation of ATM,histone modification and chromatin remodeling,cell cycle arrest,damage repair and apoptosis.microRNAs can regulate tumor radiosensitivity through above processes.This review focuses on the mechanism of microRNAs in affecting DNA damage repair and prospects the future of microRNAs in influencing the sensitivity of cancer radiotherapy in clinical application.

AIM To observe the effects of the combination of heparinoid, aspirin and losartan on the experimental vascular intima hyperplasia induced by squeezing carotid artery in rats. METHODS Rats except the normal control group were under operation after two days oral administration once a day. At the second hour after injury, blood coagulation time(CT), time of arterial thrombus formation by electrical stimulus(ATFTES) and the level of TXB_2 in plasma were measured. At the fourteenth day after the surgery, the following indexes were examined: intima/media ratio, intima area ratio, PDGF-B and PCNA immunohistochemistry in carotid artery. RESULTS CT, TATFES increased and the level of TXB_2 decreased in the groups of Hep, Asp and Hep+Asp. The PDGF-B content, the positive ratio of PCNA and the inti- ma/media ratio also decreased in the groups of Hep, Asp, Los, Hep+Asp, Hep+Los and Asp+Los. Compared with single drug or two drugs combination, PDGF-B, positive ratio of PCNA, intima/media ratio and intima area ratio decreased significantly in the group of three drugs combination( P

Liver cancer remains one of the leading cause of cancer death in the world.Animal models, especially mouse models, are important tools for studying the biological characteristics, pathogenesis, new drug screening and therapy of liver cancer.Up to now, although the development of various animal models accelerates the research of liver cancer, all the existing models have their own disadvantages.Lacking of economical and applicable animal models that can mimic the human liver cancer seriously restrict the further study of liver cancer.With the development of genetically modified technologies, it provides a fast, easy and reliable method to establish liver cancer models.In this review, we describe the different types of mouse models used in liver cancer research, with emphasis on genetically engineered mice used in this field, which may open an avenue for functional cancer genomics and generation of liver cancer models by using gene editing technologies.

Interleukin-6(IL-6)is a pleiotropic cytokine produced by monocytes, macrophages, T lymphocytes and other cell types. It is significantly up-regulated in the process of infection and inflammation, and is the core cytokine of the host's defense against environmental stresses(such as injury and infection). Abnormal and persistent IL-6 production is closely associated with the development of various autoimmune and inflammatory diseases. A growing number of studies have shown that IL-6 plays a critical role in ocular inflammation and angiogenesis in the conjunctiva, cornea, uvea and retina. Blockade of IL-6 ameliorates chronic and refractory intraocular inflammation. This article aims to review the role as well as the mechanism of IL-6 in ocular inflammatory diseases, attempting to have a deep and systematic understanding of the role of IL-6 in ocular inflammatory diseases.

In 2009,5 523 participants of She nationality living in Ningde City of Fujian province were multistage-stratified and randomly collected,and 5 080 were enrolled in analysis eventually.The TSH screening (reference range,0.3-3.0 mIU/L) revealed biochemical hyperthyroidism in 2.4％ (2.1％ of males and 2.7％ of females) and biochemical hypothyroidism in 9.7％ (7.4％ of males and 11.4％ of females) of the participants.The prevalence of positive TPOAbs was 10.8％ (7.4％ of males and 13.5％ of females).TSH values outside the normal reference range were associated with a higher prevalence of positive TPOAbs,indicating that autoimmunity seems to be an important factor in both hyperthyroidism and hypothyroidism.

Objective To investigate the effects of lipoxygenase inhibitor NDGA on expression of 5-LOX and its apoptosis related genes in HepG2 cell line.Methods The expression of 5-LOX and apoptosis related genes hTERT,bcl-2 and bax mRNA was determined by reverse transcriptasepolymerase chain reaction (RT-PCR).Results After 25,50,100,200 μmol/L NDGA treatment for24,48 h,the expression of 5-LOX of HepG2 cell decreased,but the expression of bax was up-regulated and the expressions of bcl-2 and hTERT mRNA were down-regulated,(P＜0.05 compared with the control group).The decrease in the expression of 5-LOX,hTERT and bcl-2 in HepG2 cell was negtively correlated with the dose duration of action of NDGA.Conclusion In vitro,5-LOX is expressed highly in HepG2 cell.Overexpression of 5-LOX may be related to the progression of hepatocellular carcinoma,NDGA can significantly decrease the expression of 5-LOX,up-regulate of bax and downregulation of bcl-2 and telomerse.Lipoxygenase might be a novel therapeutic target for the hepatocellular carinoma.

Objective To study the efficacy and safety of caspofungin for the invasive furlgal infection in hematopathic neoplasms patients.Methods The retrospective study of effeacy,influencing factors and adverse reaction in 64 patients with hematopathic neoplasms have been treated with capofungin from January 2007 to February 2009.The SPSS13.0 software Was used for statistic analysis.Results The overall efficacy in 64 patients was 54.7%.The median of effective time for patients with fever and non-fever were 1(1-10) day and 12.5(2-30) days,respectively.There were no significant difference in age,detection of fungus,duration time of neutropenia,hematopoietic stem cell transplant,sraft versus host disease,immunoppressive agents,CT scans,loading dose of caspofungin and salvage therapy between two groups.Drug-related toxicities was low and reversible. Conclusion This study strongly supported caspefungin as an option for empiric and salvage antifungal therapy,and therapeutic effect of caspefungin was not influenced by immune state,neutrophils and CT scans,drug-related toxicities was low.

OBJECTIVETo study Chrysanthemum morifolium dry matter accumulation and absorption characteristics of nitrogen, phosphorus and potassium at different growth stages.

METHODThrough the field experiment and the sampling analysis, the absorbing capacity of nitrogen, phosphorus and potassium as well as the growth of plant at different growth stages in Ch. morifolium were analyzed.

RESULTThe dry matter accumulation reached 70.4% of the total accumulation within 60-150 days after transplantation. Dry matter mainly distributed in leaf within 60 days after transplantation, the distribution ratio in the stem was higher than that in leaf within 60-150 days after transplantation, the highest distribution ratio was the flower, and the second was the root within 150-210 days after transplantation. The accumulative capacity of N, P and K by Ch. morifolium was lower within 45 days after transplantation, which only accounted for 16.14%, 13.39% and 10.19% of total absorptive capacity, respectively. But it increased rapidly within 45-150 days after transplantation, which accounted for 71.86%, 63.81% and 62.94% respectively. The nitrogen accumulation was slower, while the accumulation of phosphorus and potassium was increased rapidly, within 150-210 days after transplantation. The distribution ratio of nitrogen, phosphorus and potassium was different within different organs in different growth stages. The distribution ratio of nitrogen, phosphorus and potassium was mainly distributed in stem and leaf, within 150 days after transplantation, then transferring to the flower and root, the transferring efficiency was N > P > K.

CONCLUSIONthe absorption capacity of K was the highest, followed by N and P. The N : P205 : K2O ratio was 1 : 0.88 : 1.58. Correlation analysis showed that dry matter accumulation and nitrogen, phosphorus and potassium accumulation correlated positively. For producing 1g dry matter, Ch. morifolium needed to absorb 5.198 1 mg N, 4.329 5 mg P205 and 7.138 5 mg K20 from soil and fertilizer.

Absorption ; Chrysanthemum ; growth & development ; metabolism ; Fertilizers ; analysis ; Nitrogen ; metabolism ; Phosphorus ; metabolism ; Plant Leaves ; growth & development ; metabolism ; Plant Roots ; growth & development ; metabolism ; Plant Stems ; growth & development ; metabolism ; Potassium ; metabolism

In order to study the effect of seed soaking with different aluminum solution on seed germination and seedling physiological characteristics of Platycondon grandiflorum, two P. grandiflorum varieties'seed (the white flower and the purple flower) were soaked in Al3+ solution with different concentrations (0, 10, 100, 250, 500, 750 and 1000 mg x L) for 24 h, then germinated in illumination incubator. Results showed that the aluminum toxicity on the trends of the germination rate, germination index and vigor index was positive associated with its concentration, and the Al tolerance of the purple was slightly greater than that of the white. There were some relationships between the physiological indices, which were the leakage rate of electrolyte, the malonaldehyde (MDA) content, the activities of peroxidase (POD) and superoxide dismutase (SOD) , the free praline(Pro) and the soluble sugar contents, with the concentrations of Al. It was suggested that there was Al tolerance difference between the two P. grandiflorum varieties: the purple flower was greater than the white.
Aluminum ; pharmacology ; Dose-Response Relationship, Drug ; Germination ; drug effects ; Immersion ; Platycodon ; drug effects ; growth & development ; physiology ; Seedlings ; drug effects ; physiology ; Seeds ; drug effects ; growth & development

OBJECTIVE: To investigate the expression and clinical significance of oncogene AKT2 in laryngeal squamous cell carcinoma (LSCC). METHOD: The expression of AKT2 protein was measured with immunohistochemistry (Elivision two steps) in 60 cases of LSCC tissue, 28 cases of peri-cancer tissue and 16 cases of normal laryngeal epithelium, the relationship between AKT2 expression and clinical pathologic factors in LSCC was also analyzed. RESULT: The positive rates of AKT2 protein expression in LSCC and peri-cancer tissue were 56.7% (34/60), 14.3% (4/28) respectively. There was no expression of AKT2 in normal laryngeal epithelium. The positive rate of AKT2 protein expression in LSCC was significantly higher than that in peri-cancer tissue and normal laryngeal epithelium (P < 0.05, respectively). The positive rate of AKT2 was correlated with tumor site, lymph node metastasis and clinical stage of LSCC (P < 0.05, respectively), but wasn't correlated with patient's age, sex, and T stage (P > 0.05, respectively). CONCLUSION AKT2 might play an important role in the tumorigenesis and development of LSCC, and it was suggested that AKT2 could be a useful marker for predicting tumorigenesis, invasion and metastasis potential of LSCC.
Adult ; Aged ; Carcinoma, Squamous Cell ; metabolism ; pathology ; Female ; Humans ; Laryngeal Mucosa ; metabolism ; pathology ; Laryngeal Neoplasms ; metabolism ; pathology ; Lymphatic Metastasis ; Male ; Middle Aged ; Neoplasm Staging ; Prognosis ; Proto-Oncogene Proteins c-akt ; metabolism