As monosaccharide polymers,polysaccharides are widely distributed in nature,they are found in microorganisms,plants and animal cells and tissues.Glycosylation is of importance to maintain the structural stability and biological activity of protein molecules in eukaryotic cells.Polysaccharides represent the most important antigens recognized by immune system.The innate immune system senses invading microbes via their pathogen-associated molecular patterns,using pattern-recognition receptors on the surface of innate immune cells,many of which are polysaccharides uniquely expressed in certain microorganisms.Polysaccharides can also be processed intracellularly and presented to ??-T cells by MHC molecules.Polysaccharides can activate B lymphocytes,with or without T cell help,and induce production of specific antibodies.Amongst the polysaccharide-specific antibodies in human sera,some are products of adaptive humoral responses against microbial infection and others autoantibodies to glycan epitopes of host cells.Patients with autoimmune disorders tend to have higher titers of antibodies against various glycans.Immune clearance of senescence cells depends on the recognition of altered glycan epitopes on cell surface.Modification of glycan epitopes on tumour cell surface is at least partially responsible for activating antitumor immunity.Specific recognition of polysaccharides by the immune system is of importance to immunological defence,autoimmunity,anti-tumour immunity and immunological homeostasis,it will be the new focus of immunology research in the near future.

Low-dose chemotherapy is concerned in treating malignant tumor in recent years.The lowdose,metronomic chemotherapy is not only effective in antiangiogenic,but also avoid chemotherapy side effects,such as suppression of bone marrow,dysfunction of liver and kidney,gastrointestinal reaction and drug resistance.Thereby it can increase patient compliance,improve life quality and prolong survival time.Currently chemotherapy in neuroblastoma still plays a key role,especially low-dose chemotherapy,which can protect self-immune function and reduce the physical injury in children.

Objective To observe the effect of reduning inject a liquid in the treatment of EV71 infection cases.Methods The 52 cases were randomly divided into two groups by random number table.The treatment group were given reduning inject a liquid.The control group were given the treatment of Ribavirin inject.Observed and compared two groups of efficacy and Prognosis and adverse reactions.Results Prognosis of the observation group were Significantly better than the control group(x2 =5.016,P ＜ 0.05).Cooling time and deflorescence time of the observation group were shorter than the control group (t =3.475,3.687,P ＜ 0.05),the effect of fever and rash were significantly higher than the control group (x2 =6.272,6.349,P ＜ 0.05).Conclusion It is valid and safety method in the treatment of EV71 infection cases with the reduning inject a liquid,and worth popularizing.

This paper presents a portable neurogenic bladder curer,which can produce a series of pulses according to human's physiology characteristic to stimulate bladder's points.Such bladder-related diseases can benefit from this curer as increased residual urine in the bladder,urine retention and urine incontinence.Being low-cost,small and portable,it can satisfy the needs of different patients.

Objective To study how to prevent the persistent ectopic pregnancy(PEP)effectively after the conservative celioscope surgery.Methods After conservative celioscope surgery,MTX(Group A)and the traditional chinese medicine(Group B)were taken to the people who had ectopic pregnancy to prevent PEP.Results 2 examples in group A had PEP,as well as non-PEP occurred in group B.Conclusion The function of the traditional chinese medicine after conservative celioscope surgery to prevent the persistent ectopic pregnancy was much better.

Objective To study the hotspots and frontiers in research of medical big data using CiteSpace.Methods The papers on medical big data covered in Web of Science were analyzed using bibliometrics in combination with CiteSpace.Results The achievements in research of medical big data have rapidly increased since 2012.The nodes in research of big data, system, care, medicine and personalized medicine were bigger.The burst value in research of quality, children and mapreduce was higher.Conclusion The number of current researches in medical big data is greater in medical big data technology, precision medicine, medical and health big data management, medical big data privacy while mapreduce, ontology and hadoop are the frontiers and future trend in research of medical big data.

10.3969/j.issn.2095-4344.2013.25.019

BACKGROUND:The resin infiltration technique for masking white spot lesions has obtained a result superior to the conventional remineralization. Up to now, few studies have evaluated the color of carious incipient lesions treated with the resin infiltration.
OBJECTIVE:To assess the color change of caries incipient lesions in the enamel treated with resin infiltration.
METHODS: Forty-eight extracted teeth were exposed to demineralizing solution for 4 weeks to establish artificial caries models. Then artificial caries models were treated with resin infiltration and randomized into four groups: these specimens were immersed in red wine, coffee, tea and artificial saliva for 2 and 4 weeks, respectively. The base line color was evaluated by spectrophotometer. The variation in color (ΔE) was analyzed by one-way analysis of variance and Tukey’s tests.
RESULTS AND CONCLUSION:Al specimens underwent color and lightness changes, irrespective of immersion media. After 2 weeks of immersion, ΔE values were ranked as folows: red wine > coffee > tea > artificial saliva, and there were significant differences between four groups (P < 0.05). After 4 weeks of immersion,ΔE values were ranked as folows: red wine≈ coffee > tea > artificial saliva, and there were significant differences between four groups (P < 0.05) but not between the red wine and coffee groups (P > 0.05). Significant changes in the color were found in the red wine and coffee groups at different time after immersion (P < 0.05). Immersed in red wine, coffee and tea, the?E value was > 3.7, which is not acceptable in clinic. These findings indicate that the color stability of carious incipient lesions located in the enamel treated with resin infiltration is associated with the soak solution and soak time. In addition, immersion in red wine and coffee results in significantly increased color alteration (ΔE) compared with the artificial saliva.

Objective To study the imaging characters of spinal teratomas.Methods 10 cases of spinal teratomas were analyzed with clinical and radiography. 8 cases intramedullary, 2 cases extramedullary. 10 cases had MR examination. Results The location of spinal teratomas in 5 cases was in lumbar, 3 cases in thorax, 1 case in thoracolumbar, 1 case in cervical. 7 cases were multicyst type, 3 cases were singlecyst type. 10 cases of MR image showed mix signal intensity. The contrast enhancement T 1WI with fat saturation presented disappear fat signal of spinal teratomas. The teratomas heterogeneous enhancement was found in 10 cases with MR examination. 3 cases lumbosacral area of spinal teratomas united tethercord. Conclusion Neuroradiological features of spinal teratomas has specific manifestation. The T 1WI fat saturation scan is a availability nicety method for spinal teratomas.

Objective To study the MRI findings of spinal hemangioblastomas.Methods The MRI findings of spinal hemangioblastomas proved pathologically in 29 cases (20 males,9 females) were retrospectively reviewed.Results The lesions were single in 12 cases (41.4%) and multiple in 17 cases(58.6%).Seven patients combined with intracranial hemangioblastomas.On unenhanced MRI,36 tumors were isointense on T 1WI and T 2WI,16 were mixed iso-hypointense on T 1WI and mixed iso-hyperintense on T 2WI,one was hypointense on T 1WI and hyperintense on T 2WI.Small hemangioblastomas tended to be isointense on T 1WI and T 2WI.After contrast injection,all tumors enhanced markedly and homogenously with clear borders.21 tumors in 17 patients had associated vascular flow voids on T 2WI.40 tumors in 27 patients were associated with syringes or cysts.Conclusion Hemangioblastomas of the spinal cord are often multiple and in company with intracranial hemangioblastomas.The marked contrast enhancements with clear borders and associated vascular flow voids are the most important signs on MRI.