MicroRNAs are the endogenous non-coding RNAs that regulate gene expression by mediating gene post-transcriptional silence.Among them,miR-21,miR-17-92,miR-214,miR-26a,miR-221,miR-222and so on mainly suppress the expression of PTEN phosphohydrolase through targeting PTEN mRNA 3'-UTR.PTEN plays an important role in cell proliferation,apoptosis,migration and invasion,and its low expression will induce tumorigenesis.

AlM: To compare the clinical efficacy of treatment on recurrent pterygium using different concentration mitomycin C ( MMC) in the pterygium excision operation combined with the corneal limbal stem cell autografting ( CLSCA) .METHODS: Sixty patients ( 65 eyes ) with recurrent pterygium were randomly divided into three groups. All cases were accepted CLSCA, 21 patients (22 eyes) were given 0. 15g/L MMC during operation, 20 patients ( 22 eyes) were given 0. 25g/L MMC during operation, 19 patients ( 21 eyes ) were given 0. 4g/L MMC during operation. The patients were followed up for 6mo to 2a.RESULTS:The recurrent rates of the three groups were 9%, 5%, 5% respectively. There was no statistically significant differences (P>0. 05). The complication rates of the three groups were 5%, 36%, 33% respectively. There were statistically significant differences (P<0. 05). CONCLUSlON: The treatment to the recurrent pterygium using low concentration MMC has the similar recurrence rates, but the complication rate was lower, it is an ideal operation method, and it is worth popularization and application.

Objective To study the relationship between velocities of ductus venosus(DV),inferior vena cava(IVC) and right hepatic vein(RHV) of fetus,and abnormal perinatal outcome in high-risk pregnancy so as to find out which venous velocity can predict abnormal perinatal outcome and which velocity is the best for predicting abnormal perinatal outcome. Methods Velocities of DV,IVC and RHV in 67 cases of high-risk pregnancy were examined through color Doppler and their relationship with perinatal outcome was analyzed respectively. Results RHV-pulsatility index(PI) ,DV-pre-load index(PLl) ,DV-S/A and IVC-peak velocity index(PVI) could all predict abnormal perinatal outcome in high-risk pregnancy. But RHV-PI had the best prediction, and when its positive cutoff value was taken as 2. 89,the sensitivity for abnormal outcome was 75. 0% ,the specificity was 76. 7% ,and the correct index (Youden index) was 0. 52. Conclusions RHV-PI can best predict abnormal perinatal outcome in high-risk pregnancy,which can help a lot for prompt clinical treatment.

AIM: To investigate the effect of PEDF on retinal neovascularization in mice. METHODS: 40 7-day-old C57BL/6J mice was exposed to 750mL/L oxygen for 5 days and then to normal situation to produce the murine model of oxygen-induced retinopathy(OIR). One eye of the mouse was regarded as experimental one and the other served as control. Eyes in experimental group received intravitreal injection of PEDF and eyes in control group received intravitreal injection of PBS at postnatal day 12. All mice were executed at postnatal day 17. The changes of retinal vessels of mice were observed by ADPase histochemical technique. The inhibitory effect of PEDF on retinal neovascularization was evaluated by counting the endotheliocyte nuclei of new vessels which extended from retina to vitreous in the tissue slice of HE staining. RESULTS: Neovascularization was reduced, retinal blood vessels distributed regularly and non-perfusion areas were not found in eyes of experimental group compared with control group. The number of endotheliocyte nuclei of new vessels extending from retina to vitreous was significantly less in the eyes of experimental group (10.18±1.74) than that in control group (38.89±2.98) (P<0.01). Retinal toxicity and inflammatory reactions were not found in tissue slice.CONCLUSION: PEDF inhibits retinal angiogenesis in OIR and the feasibility should be determined for use of PEDF in ocular angiogenesis treatment.

Objective To investigate the relationship between age and biochemical markers of bone absorption and bone formation in old men. Methods Urinary deoxypyridinoline crosslinks (Dpd),calcium (Ca),serum bone g1aprotein (BGP),procollagen I C terminal peptides (PICP) and testosterone (Tes) were determined by ELISA. Urinary hydroxyproline (Hyp) was tested by HPLC,and bone specific alkaline phosphatase (BALP) was assayed by electrophoresis. The data from 210 old man were compared with those of postmenopausal women and young men. Results As the age increased in old men, the levels of bone absorption markers increased (Dpd:12.6%,Hyp:23.5%), and bone formation markers decreased (BGP:3.1%,PICP:45.9%).The average level of Dpd in old men was (4.53?1.34) nmol/mmolCre, lower than that of postmenopausal women [(7.90?3.27) nmol/mmolCre] and young men [(6.78?3.31) mol/mmolCre], t test P

Objective To study the chemical constituents in the whole herb of Dicliptera chinensis.Methods Separation and purification were conducted by silica gel column chromatographic and preparative TLC methods,the structures were identified by IR,NMR,and MS.Results Thirteen compounds were isolated from petroleum ester extract fraction.Their structures were identified as hexatriacontanol(Ⅰ),stearic acid(Ⅱ),lupenone(Ⅲ),lupeol(Ⅳ),4-sitost-4-en-3-one(Ⅴ),stigmast-5-en-7-oxo-3?-yl palmitate(Ⅵ),?-sitosterol(Ⅶ),oleanolic acid(Ⅷ),3?,6?-stigmast-4-en-3,6-diol(Ⅸ),6?-hydroxy-stigmast-4-en-3-one(Ⅹ),3?-hydroxy-stigmast-5-en-7-one(Ⅺ),dehydrovomifoliol(ⅩⅡ),and vomifoliol(ⅩⅢ).Conclusion All the compounds except Ⅱ and Ⅶ are obtained from the plants of Dicliptera Juss.for the first time.

Objective To evaluate the role of diffusion weighted (DW) echo planar MRI in differentiating between brain abscesses and necrotic or cystic tumors. Methods Five patients with brain abscesses, 7 with malignant gliomas, and 1 with brain metastasis were consecutively examined using conventional MRI and diffusion weighted imaging (DWI). The apparent diffusion coefficient (ADC) of ROI was measured with two different b values (0 and 1 000 s/mm 2 or 0 and 1 200 s/mm 2). The results were analyzed using two independent samples test. Results On diffusion weighted imaging, brain abscesses showed marked hyperintensity in all 5 patients, whereas necrotic or cystic brain tumors demonstrated hypointensity in all 8 patients. ADC mean values of brain abscesses, which was 0.43?10 -3 cm 2/s, were lower than those of necrotic or cystic portion of brain tumors ( T =15.00, P

Academic Dissertations as Topic ; Diagnostic Imaging ; Humans

A simple assay for detection of phospholipase C (PLC) activity was developed based on a fluorescence liposome probe using the Liss Rhod PE-loaded phospholipid liposomes.The liposome probe was prepared by the coassembly of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) and fluorescent lipid (Liss Rhod PE).The probe showed very low background fluorescence due to fluorescence self-quenching effect of Liss Rhod PE.As the PLC enzyme selectively digested lipid, the Rhod fluorescence was recovered from its quenched state, leading to the sensitive detection of PLC.This assay provided a limit of detection (at a signal-to-noise ratio of 3) of 2 U/L for PLC.In the presence of PLC inhibitor, the fluorescent response of the sensor for PLC decreased, indicating that the assay could also be used for screening PLC inhibitors.

At present,most of the scholars of traditional Chinese medicine (TCM) considered that climacteric syndrome was caused by yin-deficiency,as the therapy of nourishing yin and clearing heat was the most common treatment,neglecting the pathologic role of yang-deficiency in climacteric syndrome.This paper redefined the pathogensis of climacteric syndrome and its syndromes based on differentiation in Gynecology of Traditional Chinese Medicine of various versions and in accordance with previous syndrome epidemiological results over it.The emerge of hot flushes and sweating,forgetful and hyposexuality was prevalent.The inaccurate description of hot flash and sweating in climacteric syndrome was rectified.The therapeutic effects of nourishing yin therapy on vasomotion were discussed based on the understanding of etiology,pathology and treatment of climacteric syndrome in ancient Chinese medical books.The phytoestrogens action of warming kidney-yang drugs was summarized from the aspect of modern pharmacology for exploring the significance of the role of yang-deficiency in climacteric syndrome.The treatment against yang-deficiency would be an innovative clinical pathway of climacteric syndrome.