microRNAs play a critical role in breast tumorigenesis and progression, in which it might serve as oncogene, tumor suppressor gene, regulators of invasion, apoptosis and therapy resistance. Moreover,there has been a large body of evidences for the involvement of miRNAs in the self-renewal, differentiation and tumor formation of breast cancer stem cells. This review respectively summarizes the relations between microRNAs and breast cancer, breast cancer stem cell as well as the progresses of applying microRNAs to tumor therapy.

Objective To investigate the effect of different antidepressants (mirtazapine and fluoxetine) on food intake, body weight, tumor growth in a mouse model of pancreatic cancer. Methods A subcutaneous xenograft mouse model of human pancreatic cancer SW1990 was established. The tumor-bearing mice were randomly divided into saline solution control group, mirtazapine group, fluoxetine group, with 7 mice in each group. All mice were treated once daily with saline solution, mirtazapine (10mg·kg-1·d-1), fluoxetine (10mg· kg-1·d-1), orally by using metal garage feeding needles for 42 days. Tumor size, body weight, food intake were investigated. Results There was no significant difference in tumor size in the three groups. From the 2nd week, the food intake of mice in the mirtazapine group significantly increased compared with other two groups; the body weight of mice in the mirtazapine group at the 4th week was (16.00±1.41) g, which was higher than those in other two groups (P<0.05); from the 3rd week, the food intake of mice in the fluoxetine group significantly decreased compared with control group, and the body weight also decreased significantly from the 6th week (P<0.05) ; at the 6th week, the food intake of mice in the control, mirtazapine and fluoxetine groups were (3.54±0.13)g, (4.19±0.16)g and (3.34±0.13)g, and the body weight were (13.71±1.11)g, (14.86±1.68)g and (12.57±1.51)g, respectively. Conclusions Mirtazapine was better than fluoxetine in increasing food intake and alleviating body decreasing on a pancreatic cancer mouse model. However, there was no significant effect on the pancreatic tumor growth.

Objective To investigate the anti-tumor effects of photodynamie therapy(PDT)on human pancreatic cancer xenograft in nude mice and the time-effect relationship of PDT.Methods The animal model of human pancreatic cancer was developed by suturing small pieces of SW1990 tumors into the dorsum of nude mice.When the size of the tumors increased to 0.8～1.0 cm.36 mice were randomly divided into three groups:control group(no treatment),photosensitizer group(Photosan 2mg/kg,abdominal cavity injection),photodynamic group(Photosan 2 mg/kg injection+laser irradiation).Each group included 12 mice.The tumor sizes were measured twice per week and the weight8 and volumes of the tumors were measured,and the tumor inhibitory rate was calculated three weeks later.Results The tumor volume of photodynamic group was (0.22±0.12)mm3 at the 6th day,which was significantly smaller than(0.43 s0.18)mm3 of control group and(0.39±0.15)mm3 of photosensitizer group(P＜0.05).15 days later,the tumor volumes of PDT groups increased.21 days later.the weight of the tumors in photodynamie group was(0.69±0.23)g,which was significantly lower than(1.65 ±0.21)g of control group and(1.62±0.12)g of photosensitizer group(P＜0.05).The tumor inhibitory rate in photodynamic group was 58.18%,which was significantly higher than that of photoseasitizer group(1.8%,P＜0.05).Conclusions Photodynamie therapy had significant anti-tumor effect on human pancreatic cancer with quick-acting efficacy,but photodynamie therapy alone exeaed efficacy only in the shoa term.

Tumor necrosis factor-related apoptosis-inducing ligand(TRAIL) is a new anti-tumor biological agents which is very hot in recent years through its death receptor-induced apoptosis of tumor cells,and non-toxic to normal cells,and has synergy with the chemotherapy drug,but there is also resistance mechanisms.This article will review the biological characteristics of TRAIL and its receptors,TRAIL-induced apoptosis of tumor cells,as well as the mechanism of TRAIL in leukemia in the progress of treatment.

Objective To investigate the effects of mirtazapine in combination with gemcitabine on food intake,body weight and tumor growth of human pancreatic carcinoma xenografts in nude mice.Methods 24 subcutaneous pancreatic cancer xenograft nude mice were randomly divided into control group,gemcitabine group(receiving 100 mg/kg gemcitabine i.P.on days 1,4,7 and 10 after operation)and combination group (gemcitabine as above and mirtazapine,10 mg·kg~(-1)·d~(-1),orally feeding for 21 days),with 8 mice in each group. All mice were sacrificed at day 21.Food intake,body weight and tumor size were compared among three groups.Results Gemcitabine group showed significant anti-tumor effects,but adverse effects such as decreasing food intake and body weight Was also noted. On days 21,there Was no significant difference in tumor size between combination group and gemcitabine group.The tumor inhibition rates of the two groups were 69.13%and 71.60%respectively(P>0.05).The food intake of mice and body weight[(3.12±0.11)g and(14.68±0.42)g]in combination group were slightly greater than these of gemcitabine group[(2.96±0.14)g and(14.38±0.61)g,P>0.05],but these parameters were significantly lowerthan those of control group[(4.65±0.13)g and(17.46±0.52)g,P<0.05].Conclusions Gemcitabine chemotherapy showed significant anti-tumor effects. Mirtazapine cannot significantly enhance the anti.tumor effect of gemcitabine. However,mirtazapine could alleviate adverse events of gemcitabine to some extent.

Objective To investigate the effects of gemcitabine,a cytotoxic drug,combined with photodynamic therapy (PDT) in treatment of human pancreatic cancer xenograft in nude mice.Methods The animal model of human pancreatic cancer was developed by suturing small pieces of SW1990 tumors into the dorsum of nude mice.Sixty animal models were randomly divided into five groups with 12 each:control group ( without any treatment ), photosensitizer group ( 2 mg/kg of Photosan, without illumination ),chemotherapy group (receiving 50 mg/kg of gemcitabine i.p. on day 0,3,6 and 9 after transplantation),photodynamic group (2 mg/kg photosan combined with laser irradiation) and combination group (50 mg/kg of gemcitabine and 2 mg/kg of photosan combined with laser irradiation). The tumor sizes were measured twice every week.All mice were sacrificed after 21 days.The tumor volume was calculated,and inhibitory effect and changes before and after treatment were analyzed.Results The tumor was grown bigger in control,photosensitizer and chemotherapy groups (all P value ＜0.05).On day 6,9,12,15,18and 21, the tumor size was significantly smaller in photodynamic group than those in control and photosensitize groups.While the tumor size on day 18 and 21 was smaller in combined group than those in photodynamic group(all P value ＜0.05). The tumor mass was (0.29 ± 0.20) g in combined group,which was lower than that in photodynamic,control,photosensitize and chemotherapy groups[(0.69±0.23) g,(1.65±0.21) g,(1.62±0.12) g,(1.37±0.19) g,respectively,P＜0.05].The inhibitory effect were 82.420%00 and 58.18% in combined group and photodynamic group,respectively(P＜0.05),while there was 1.80% and 17.00% in photosensitize and chemotherapy groups,respectively.Conclusions Photodynamic therapy has significant and short anti-tumor effect,but it can be significantly enhanced by combined with small dose of gemcitabine.

According to the recent years’ review of international and domestic relating journals and collections, the conception, mechanism, and treatment of sympathetic cervical spondylosis are summarized.All authors have agreed that posterior cervical nerve syndrome proposed by Barre-Lieou and addressed in this paper, whose mechanism mainly is cervical vertebral degeneration stimulus, or oppression upon sympathetic nervous fiber, or spasm of vertebral artery, is generally treated by non-operative methods and cautious operative methods.The main cause of sympathetic cervical spondylosis is cervical vertebral instability, which stimulates sympathetic nervous fiber to make vertebral artery to convulse. And its treatment is mainly conservative treatment and supplementary operation. But it is usually subject to reoccurrence. Operative methods include cervical disk excision, cervical inter-body fusion and bone grafting and inner fixation, instable factor elimination. But eligible condition is relatively short.

Objective To investigate the clinical efficacy and value of low molecular weight heparin calcium combined with vertebroplasty in the treatment of osteoporotic vertebral compression fractures in elderly patients .Methods 67 elderly patients with osteoporotic vertebral compression fractures in our hospital from January 2013 to January 2016 were selected and randomly divided into control group 30 cases and treatment group 37 cases. All patients were treated with percutaneous vertebroplasty, the control group was given calcium carbonate D3 conventional treatment, the treatment group was treated with low molecular weight heparin calcium anti osteoporosis treatment, the course of treatment was one month.Measurement of bone mineral density before and after the operation of different follow-up time points ( BMD ) and the changes of the oswestry disability index ( ODI ) evaluation activities and the visual analogue scale (VAS) to assess the degree of pain, and the changes of vertebral height before and after operation were analyzed. Results All patients were followed up for an average of 16.4 months (12 to 21 months).Compared with before vertebroplasty, the BMD of the patients in the treatment group was higher than that in the control group at one month, three months and six months, the difference was statistically significant (P<0.05), the low molecular weight heparin treatment after January, treatment group VAS and ODI scores were significantly lower than the control group, and the subsequent different follow-up time points ODI and VAS score can effectively maintain, the difference was statistically significant ( P<0.05) .Compared with before vertebroplasty, postoperative anterior vertebral height, middle height better than preoperative vertebral height, the difference was statistically significant (P<0.05), and after one months of treatment, the treatment group of anterior vertebral height, middle height were better than the control group, the difference was statistically significant (P <0.05).Conclusion After treatment with low molecular weight heparin calcium, the healing process of vertebral body after vertebroplasty, to a certain extent, it can increase the bone mass and prevent bone destruction, increase bone strength, and further achieve the treatment of osteoporosis and prevention of osteoporotic fracture in elderly patients with osteoporotic vertebral compression fractures.

Objective Drug resistance is the main reason for chemotherapy failure ,it is to be solved how to overcome this . Recent studies indicate that epithelial-mesenchymaltransition (EM T ) may involved in chemotherapy resistance for some types of cancers .But it is still unknown whether EM T is involved in chemotherapy resistance for colorectal carcinoma .This study was con-ducted to investigate the relation between EM T and colorectal cancer chemotherapy resistance .Methods Abilities of migration and invasion of Oxaliplatin resistant colorectal carcinoma cell lines LOVO /L-OHP and wild type colorectal carcinoma cell lines LOVO were investigated by transwell migration and transwell invasion assays .The level of E-cadherin and Vimentin was detected by West-ern blot .EM T of LOVO was induced by GSK-3β inhibitor SB415286 treatment and validated by transwell migration and transwell invasion assays and Western blot for E-cadherin and Vimentin .The sensitivity of LOVO to Oxaliplatin after SB 415286 inducing EM T was evaluated by M TT and Annexin-V /PI assays .Results EM T phenotype was confirmed by morphology feature ,results of transwell migration and invasion assays and level changes of E-cadherin and Vimentin .In addition ,the results of proliferation and apoptosis tests showed that the sensitivity of LOVO to Oxaliplatin after SB 415286 inducing EM T decreased significantly ,which means chemotherapy resistance .Conclusion The direct association between EM T and chemotherapy resistance for colorectal carci -noma is proved in this study ,which provides basis for intervening chemotherapy resistance and new researching strategies .

As a member of homeobox gene family,HOXC is expressed in many organs and can regulate gene expression,cell differentiation and morphogenesis.Abnormality of its function is closely related to the prognosis of leukemia,breast cancer,renal cell carcinoma,prostate cancer and so on.