Objective To study the serum levels of PSA, PAP joint detection in diagnosis of prostate cancer and the effect of estrogen on it.Methods60 patients with prostate cancer were selected in Jinyun County People's Hospital department of urology patients, giving diethylstilbestrol 3mg, oral once a day, and give Aspirin Enteric-coated Sustained Release Tablets 100mg oral, once daily, for 2 consecutive months.At the same time, we selected 60 cases of patients with benign prostatic hyperplasia, normal control group of 60 healthy subjects were the same period.Using radioimmunoassay, were observed inprostatic hyperplasia group, normal control group, the prostate cancer group before treatment, the prostate cancer group after treatment, serum PSA, PAP levels, as well as the group before and after treatment in patients with prostate cancer IPSS score index.ResultsThe prostate cancer group, serum PSA, PAP levels were significantly higher than that of benign prostatic hyperplasia group and normal control group, the difference was statistically significant (P<0.05);no significant difference was found between the prostatic hyperplasia group and normal control group, PSA in prostate cancer positive detection rate and the detection sensitivity is 78.33% the specificity was 70%, the index of PAP in prostate cancer, and the positive detection rate and the detection sensitivity was 53.33%, specificity index reached 93.33%;PSA for prostate cancer detection positive rate and sensitivity was higher than that of PAP, but the specificity is less than PAP, the difference is statistically significant (P<0.05) after treatment;the prostate cancer group, serum PSA, PAP levels were improved, compared with that before treatment, serum PSA, PAP levels decreased significantly, the difference was statistically significant (P<0.05);and after the treatment, the prostate cancer group of prostate symptoms have improved, compared with before treatment, IPSS score decreased significantly, the difference was statistically significant (P<0.05).ConclusionThe combined detection of serum PSA, PAP in the diagnosis of prostate cancer can improve the sensitivity and specificity, and can be used for early diagnosis of prostate cancer;estrogen can lower their level, improve the symptoms of prostate cancer, inhibit the progress of the disease.

BACKGROUND: Chitosan is commonly prepared using emulsion freeze-drying methods, which is complexly operated. OBJECTIVE: To introduce a simple methods for the preparation of chitosan and analyze its biological characteristic. DESIGN, TIME AND SETTING: Controlled observation experiments were carried out in the Central Laboratory, the Second Affiliated Hospital of Chinese Medical University (Shenyang, Liaoning, China) from April to December in 2007. MATERIALS: Ten Wistar rats of 8 weeks old and SPF grade were adopted. Chitosan powder in separated packs, with 99% purity and 99% deacetylation degree were the product of Shandong Jinan Ocean Bio-Product Co., Ltd. (China). METHODS: Acetic acid solution was added into chitosan to prepare 8% chitosan acetic acid hydrosol, which was then stayed for one day. Flowing the immersion into the hydrosol and immediate dislodgement, plastic tube was soaked in 1 mol/L sodium hydroxide for 3 minutes. Hydrosol out of the tube etiolated and coagulated into jells, the tube was removed when the jells were semi-dried. Subsequent to complete drying, chitosan tubes were prepared as an internal diameter of 5 mm, and were cut into many segmentations (length 2 mm). The prepared tubes were subcutaneously implanted into rat muscular tissues at right McBurney point, while rat left muscular tissues were only incised and sutured, taking as controls. MAIN OUTCOME MEASURES: Gross observation of chitosan tube, degradation percentage of chitosan tubes in rat muscular tissue, and tissue inflammation change around chitosan tube detected by hematoxylin-eosin stain. RESULTS: The surface of chitosan tube was smooth and the tenacity was good. Intramuscular implantation test showed that 50% and 90% chitosan tubes were absorbed by tissues in 4 weeks and 8 weeks postoperatively. Inflammatory reaction surrounding tubes was decreased gradually. CONCLUSION: It gives a new kind of way to prepare chitosan tube, with few materials, low cost, simple operation and short time. The prepared chitosan tubes approve the good histocompatibility and biological degradation.

[Objective] To mensurate and compare with the mensuration of alkaloid and saponin in the flower,pedicel and bulb of fritillariae thuubergii,make full use of all parts of fritillariae thuubergi.i[Method]To mensurate the mensuration of alkaloid and saponin in the three parts of fritillariae with the twophase titration method and gravimetric method.[Result]The mensuration of alkaloid in the flowers of fritillariae thuubergii is 0.182%,while it is 0.047% and 0.341% in the pedicel and bulb separately,and the mensuration of saponin in the flowers of fritillariae thuubergii is 5.112%,while it is 8.840% and 1.724% in the pedicel and bulb separately.[Conclution] The difference of major component in the fritillariae thuubergii offers the foundation to make full use of the flowers,pedicel and bulb.

Objective To compare the efficiency of χ~2-Fisher's exact test which is one of the competitive null hypothesis approaches with SAM-GS which belongs toself-contained null hypothesis approaches. Methods The two methods were used to analyze a simulation experiment which contained five different scenarios. The results were compared with the simulated initialization,and assessing indexes were calculated to compare the efficiency. Results Under the same conditions,SAM-GS always have higher power than that of χ~2-fisher's exact test. However, the final inference is equivalent, namely if the difference between the two groups are smaller than 0.30,the two methods can not be better to identify differences between them. By contrary, when the differences between the two phenotypes are larger than 0.30, the two ways can both identify differences. Conclusion SAM-GS tends to have slightly higher power thanχ~2-Fisher' s exact test. The two methods can be used for screening enrichment gene sets of gene expression profile.χ~2-Fisher's exact test has the important advantage of being able to analyze multi-class phenotype.

Objective To research the effects of metformin on proliferation and apoptosis in human breast cancer MCF-7 cells and investigate the role of Foxp3 in the effect.Methods The inhibit rate of MCF-7 cells was measured by MTT assay after 48 h metformin treatment(5 mmol/L、10 mmol/L、20 mmol/L).Metformin-induced cell apoptosis was measured by Hoechst 33258 stai-ning and flow cytometry.The expression levels of Foxp3 and caspase-3 mRNA were detected by real-time PCR.Expression of Foxp3 protein was detected by Western blot.Results Metformin markedly inhibited proliferation of MCF-7(P<0.05)compared with control group.And the early apoptotic rates increased to 3.76%,8.96%,and 18.67% with 5 mmol/L、10 mmol/L、20 mmol/L metformin treatment,respectively.Metformin increased caspase-3 mRNA expression levels,and decreased the expression levels of Foxp3 mRNA and protein expression levels(P<0.05,vs.control).Conclusion Metformin could inhibit the proliferation and in-duce apoptosis of MCF-7,and its mechanism maybe related to down-regulated expression of Foxp3.

Objective To determine the expression of c-myc and CD24 in colorectal carcinoma,colo-rectal polyp and normal mucosa,and to explore the role and correlation of them in the carcinogenesis of colorec-tal carcinoma. Methods The expression of c-myc and CD24 in colorectal carcinoma(n = 60),colorectal ade-nomatous polyp(n = 45),colorectal hyperplastic polyp(n = 15)and the adjacent non-cancerous tissue(n =30)was observed by immunohistochemical assay. Results The positive rate of c-myc in colorectal carcinoma were 73. 3% ,significantly higher than that in colorectal adenomatous polyp 44. 4%( χ2 = 9. 016 8,P <0. 01),colorectal hyperplastic polyp 13. 3%(χ2 = 18. 215 9,P < 0. 01)and adjacent non-cancerous tissue 6. 7%(χ2 = 25. 133 0,P < 0. 01);the positive rate of CD24 in colorectal carcinoma was 76. 7% ,significantly higher than that in colorectal hyperplastic polyp 6. 7%(χ2 = 25. 133 0,P < 0. 01)and adjacent non-cancerous tissue 3. 3%(χ2 = 43. 107 4,P < 0. 01). c-myc expression in colon cancer was significantly correlated with cancer site(χ2 = 8. 352 3,P < 0. 01),lymph node metastasis(χ2 = 4. 275 1,P < 0. 05),differentiation (χ2 = 4. 115 3,P < 0. 05)and TNM stage(χ2 = 5. 739 9,P < 0. 05). CD24 expression in colon cancer was significantly correlated with cancer size(χ2 = 9. 333 6,P < 0. 01),lymph node metastasis(χ2 = 7. 693 0,P <0. 01),differentiation(χ2 = 5. 870 0,P < 0. 05)and TNM stage(χ2 = 4. 498 7,P < 0. 05). There was a pos-itive correlation relationship between CD24 and c-myc in colorectal carcinoma tissue(χ2 = 10. 824 9,r = 0. 39, P < 0. 05). Conclusion The expression of c-myc and CD24 are high in colorectal cancer,having a significant correlation with some of the clinicaopathological features. c-myc is likely to act as a downstream target gene of CD24 signaling pathway,whose expression is probably regulated by CD24 in colorectal carcinoma tissue.

Melatonin holds a wide range of biological effects, its multi-channel and multi-target impacts on reproductive sys-tem are the basis of pregnancy related rhythm, including conception, the duration of pregnancy and delivery.This paper describes the synthesis of melatonin, the characteristics of melatonin receptors distribution and melatonin′s biological property.It also illuminates the influence of melatonin rhythm on the above-mentioned courses, hoping to provide theory basis for clinical suggestions to modulate rhythm around pregnancy.

BACKGROUND:Stem cel transplantation has incomparable superiorities in the treatment of cardiovascular diseases. But stem cel s have a very low efficiency to differentiate into myocardial cel s spontaneously, and there are many factors influencing stem cel differentiation. OBJECTIVE:To clarify the pros and cons of different sources of stem cel s in the treatment of myocardial infarction, to investigate the methods for improving the differentiation efficiency of myocardial cel s, optimal differentiation conditions and mechanism underlying exercise-induced stem cel mobilization and endogenous myocardial cel regeneration. METHODS:A computer-based search of CNKI and PubMed databases was performed by the first author for articles related to stem cel therapy for myocardial infarction and stem cel differentiation into myocardial cel s, exercise effect on stem cel proliferation and myocardial cel regeneration published from 1985 to 2015. The key words were“stem cel s, myocardial infarction, myocardial regeneration, cardiac cel , exercise”in Chinese and English, respectively. Final y, 54 articles were included in result analysis. RESULTS AND CONCLUSION:In recent years, a variety of chemical inducers and biological components have been used in the myocardial differentiation of stem cel s. Simulation of myocardial microenvironment and vascular cel growth factors are the main methods of inducing myocardial differentiation. Aerobic exercise-induced stem cel mobilization can induce ischemic cardiac angiogenesis and upregulate a variety of vascular endothelial growth factors so as to promote myocardial proliferation and repair. However, in-depth exploration is stil needed in the harvesting of stem cel s, transplant rejection, and regulatory mechanisms underlying the directed differentiation of stem cel s into cardiomyocytes.

Diabetic cognitive dysfunction is one of the important complications of diabetes mellitus .Insulin plays an important protective role in cognitive function through MAPK and PI 3-K/Akt signaling pathway .Insulin resistance may give rise to excessive tau protein phosphorylation , formation of neurofibrillary tangles inhibits insulin degrading enzyme , reduces the degradation of amyloid β;enhances oxidative stress , further damages the integrity of the neu-ronal structure and function and eventually leads to cognitive dysfunction .

Objective To investigate the application value of Atlas titanium cable in the treatment of comminuted patellar fractures (CPF).Methods 80 patients with CPF in our hospital from January, 2010 to January, 2013 were randomly selected and divided into observation group (n=40) and control group (n=40) by digital random method.Observation group adopted Atlas tita-nium cable internal fixation treatment while control group adopted the improved tension band steel wire in the hollow compression screws fixation treatment.Preoperative (t0), postoperative 1 month (t1), 6 months (t2) and 1 year (t3) Bostman patellar injury curative effect score (BPICES), operation time, intraoperative blood loss, postoperative knee joint exercise time for the first time, length of hospital stay, treatment costs and complications of two groups were compared.Results Preoperative BPICES of two groups had no statistical significant difference (p>0.05).Compared with t0, t2 and t3 BPICES and the rate of optimal curative effects, two groups increased; Compared with the control group, t2 and t3 BPICES and the rate of optimal curative effects of observation group also increased, and the difference was statistically significant (p<0.05).Operation time, intraoperative blood loss, postoperative knee joint exercise time for the first time, length of hospital stay of observation group were (52.26 ±10.29) min, (70.48 ±10.49) ml, (4.78 ±1.48) d and (5.98 ±1.06) d respectively, which were lower than the (79.95 ±8.42) min, (123.36 ±21.18) ml, (9.14 ±4.48) d and (11.18 ±2.68) d of the control group;Therapy cost of observation group was (16 284.47 ±2 145.78) Yuan, which was higher than the (9 892.48 ±1 456.42) Yuan of the control group (p <0.05).Compared with control group, peptide wire/wire Piercing the skin, pain, infection, skin irritation, slippery bursa phlogistic, internal fixation of fracture parted, fracture end separation and other complications total incidence of observation group were lower (p<0.05).Conclusion Atlas titanium wire trea-ting of patients with CPF had shorter operation time and hospitalization time , less postoperative complications.It can promote the rapid recovery of knee joint function, but its cost is higher.Thus it is suitable for CPF patients with better economic conditions .