Objective To investigate the effects of FTY720 on retinal photoreceptor cells and microglial following light-induced degeneration in rat retina.Methods 120 Sprague-Dawley rats were randomly divided into four groups including FTY720 group,solvent control group,model group and normal group.The rats of normal group were not intervened.The FTY720 group,solvent control group and model group establish retinal light injury mode.FTY720 was injected into abdominal cavity of the rats in FTY720 group 0.5 hours before light exposure.50％ dimethylsulfoxide was injected into abdominal cavity of the rats in solvent control group.The expressions of microglial cells in rat retinal were quantified using flow cytometry,the expressions of interleukin (IL)-1β were examined by enzyme-linked immuno sorbent assay at 6 hours,1 day,3 days,7 days after light exposure.The apoptosis of retinal photoreceptor cells were measured by terminal-deoxynucleoitidyl transferase mediated nick end labeling at 1 day after light exposure.The morphological change of retinal were viewed by haematoxylin and eosin staining at 7 days after light exposure.Results The expressions of microgilal and IL-1β began to rise at 1 day after light exposure,reached at peak at 3 days and decreased at 7 days.The expressions of IL-1βand microglial in FTY720 group were significantly lower than solvent control group and model group,but higher than normal group (P＜0.05).One day after exposure to light,the apoptosis cell ratio in normal group,model group,solvent control group and FTY720 group were 0,(87.66 ± 2.50) ％,(86.00 ± 2.44) ％,(49.66 ± 2.80) ％.The apoptosis cell in FTY720 group were higher than normal group,lower than solvent control group and model group (P＜0.05).Seven days after exposure to light,the retinal in normal group was structured and the cell was arranged well,the cell in solvent control group and model group was irregular arrangement and the outer nuclear layer (ONL) was thin after light exposure.The thickness of the ONL in FTY720 group was significantly higher than solvent control group and model group,below normal group.Conclusion FTY720 can prevents retinal photoreceptor cells from apoptosis and inhibits activation of microglial.

Objective To observe the change of vascular endothelial cells and structure of the auricular posterior vein caused by freezing or pingyangmycin injection alone and freezing in combination with pingyangmycin injection,to investigate the effect of these treatments on the vein. Methods Eighteen rabbits were divided into 3 groups of 6 each, and another rabbit was used as a control. (Pingyangmycin) was injected into the auricular posterior vein in the first group, spray freezing within 20 seconds on the auricular posterior vein was performed in the second group,and freezing in combination with pingyangmycin injection was performed in the third group. Light microscope and transmission electron microscope were used to observe the change of auricular posterior vein in the rabbits.Results Proliferation of endothelial cells,and thickening of vessel wall were induced by pingyangmycin. Thrombus formation, tissue oedema and inflammatory infiltration induced by spray freezing within 20 seconds were reversible. Thrombus formation, proliferation of endothelial cells and thickening of the vessel wall was induced by freezing in combination with pingyangmycin injection.Conclusion Freezing and pingyangmycin injection have the synergistic effect, resulting in the proliferation of endothelial cells, thrombus formation, thickening of vessel wall, and even occlusion of vessels.

Objective To investigate the expression level of lipocalin-type prostaglandin D synthase (L-PGDS) mRNA and its protein in glioma.Methods The L-PGDS mRNA was determined by real-time quantitative RT-PCR in 23 glioma and 5 healthy brain specimens. L-PGDS protein was detected by Western blot in cerebrospinal fluid (CSF) and brain tissue specimens.Results In 23 glioma specimens L-PGDS mRNA expression ranges from 1.5?10 3～7.0?10 4 copy/?g RNA, mean value is 1.6?10 4 copy/?g RNA. In 5 normal brain specimens, the mean value is 8.1?10 5 copy/?g RNA, statistic analysis indicates a distinct discrepancy ( P

Objective To investigate the levels and distribution of radon concentrations in groundwater in some representative cities in China,and estimate the effective dose from inhaled radon released from domestic groundwater.Methods A total of 12 cities in 7 provinces (municipalities) were selected,including Beijing,Inner Mongolia,Ningxia,Shaanxi,Henan,Liaoning and Heilongjiang.In total,73 water samples from groundwater supply were taken.Radon concentrations in water samples were determined by using a continuous radon monitor with air-water exchanger.Results The average radon content in groundwater for drinking was 11.8 Bq/L in 12 cities in 7 provinces,ranging from 1.0 to 63.8 Bq/L.The radon concentrations in 37％ water samples exceeded 1 1.1 Bq/L,the safe limit recommended for drinking water by the United States Environmental Protection Agency (EPA).The radon contents in all of the water samples was lower than the reference level 100 Bq/L recommended by World Health Organization (WHO).The average annual effective dose arising from inhaled radon released from groundwater was 29 μSv (2.4 to 160 μSv).Conclusions Generally,the effective dose from inhaled radon released from groundwater is negligibly low.However,in some areas dominated by granite bedrock,the dose contribution from radon released from groundwater to residents should be routinely monitored.

Objective To establish the animal model of denervated masseter and observe the changes of denervated masseter. Methods The model of denervated masseter was established by abscising selectively masseteric nerve, its superior division or inferior division of the right in 75 New Zealand rabbits and the left served as negative control. Another 25 rabbits were used as normal control. The thickness of experimental masseter was compared with that of negative controls and normal controls by type B ultrasound examination, and the histochemistry for the masseter changes was done at the 2~ nd , 4~ th , 8~ th , 12~ th , 24~ th week after masseter was cut off. Results The thickness of experimental masseteric muscle got thinner, and the section area of muscle fiber got smaller, but the type of musle fiber was of no obvious changes, as compared with that of normal controls. Conclusion The model is available and credible, and useful in researching masseter of denervated nerve in rabbit.

With new acupuncture and moxibustion as the study object, based on the basic composition of acupuncture-moxibustion theory, from 3 aspects of meridian-acupoint theory, acupuncture-moxibustion method theory and acupuncture-moxibustion treatment theory, under the background of western medicine, ZHU Lian's different opinions on theory and method of acupuncture and moxibustion were discussed. It was believed by ZHU Lian that the distribution of 14-meridians was approximately identical to that of nerves, so with modern neuroanatomy knowledge to understand the meaning of acupoint; the acupuncture function could be explained from the angle of neurophysiology. Clinical diagnosis and treatment method could be established by modern classification methods of diseases. ZHU Lian's cognition that was different from traditional theory and method of acupuncture and moxibustion was combined with updated physiology and anatomy knowledge at that time, and was involved with Pavlov's advanced nerve theory, so she firstly put forward the opinion that acupuncture therapy can't work without the involvement of cerebral cortex.
Acupuncture Points ; Acupuncture Therapy ; history ; psychology ; Books ; history ; China ; History, 20th Century ; History, 21st Century ; Humans ; Knowledge ; Medicine ; Moxibustion ; history ; psychology

Medical therapy,education and scientific research are three functions of a hospital,in which education is one of the core tasks.The author thinks that we should strengthen the cultivation of the teachers;raise the level of the managements;increase the teaching input and reinforce the reform of education and scientific research so as to drive and improve the development of the hospital.

AIM:To research the effects of lithium chloride on transforming growth factor beta (TGF-β) and connective tissue growth factor (CTGF) in cultured human Tenon capsule fibroblasts (HTFs) and explore its mechanism.METHODS:HTFs were cultured and identified by vimentin staining with immunofluorescence and the morphological characteristics.The experimental group was processed 48h with LiCl in concentration of 80mmol/L, the control group without LiCl.The mRNA expression of TGF-β and CTGF in two groups were analyzed with real-time fluorescent quantitative polymerase chain reaction (real time-qPCR) and the protein expression was detected with Western blot.RESULTS:The cultured HTFs expressed TGF-β and CTGF.The mRNA expression of TGF-β and CTGF significantly decreased compared with the control group(t=20.042, 14.995, P<0.05).the protein expression of TGF-β and CTGF also decreased significantly compared with the control group(t=46.058、12.452, P<0.05)CONCLUSION:The cultured HTFs can express TGF-β and CTGF in mRNA and proteins' level.LiCl can reduce the expression of TGF-β and CTGF both in gene and proteins' level.LiCl has the potential to modulate wound healing for glaucoma filtration surgery.

OBJECTIVETo test the different contrctile responses of extracellular nucleotides, such as ATP, UTP and nucleotide uridine adenosine tetraphosphate (Up4A) in gastric longitudinal muscle (LM) and circular muscle (CM). Examined the effect of P2X and P2Y receptor antagonists (in this study, we used IP5I and suramin) and cyclooxygenase inhibitor (indomethacin) on Up4A induced contractile responses in LM and CM.

METHODSThe rats were sacrificed and the stomachs were opened to gain LM and CM. Using organ bath system to assess contrctile responses of smooth muscle.

RESULTSUp4A could induce contractile responses in both CM and LM, which were similar with ATP and UTP. IP5 did not attenuate Up4A could induce contractions in both LM and CM, but suramin and indomethacin significantly inhibited Up4A contraction in CM, but not in LM.

CONCLUSIONOur results suggest that extracellular nucleosides and their inhibitors induce different responses between LM and CM.

Adenosine Triphosphate ; pharmacology ; Animals ; Dinucleoside Phosphates ; pharmacology ; Indomethacin ; Muscle Contraction ; Muscle, Smooth ; physiology ; Nucleotides ; pharmacology ; Rats ; Suramin ; Uridine Triphosphate ; pharmacology

Mean hemoglobin (Hb) concentration of about 3 500 subjects derived from 17 studies of Himalayan highlanders (Tibetans, Sherpas, and Ladakhis) was compared with lowlanders (Chinese Han, Indian Tamils) lived in the Himalayas, and European climbers during Everest expeditions as well as Andean natives. The results found that Hb concentration in Himalayan highlanders was systemically lower than those reported for Andean natives and lowland immigrants. These comparative data demonstrated that a healthy native population may successfully reside at high altitude without a significant elevation in Hb, and the lower Hb levels of Himalayan highlanders than those of migrated lowlanders and Andean natives are an example of favourable adaptation over the generations. In addition, excessive polycythemia has frequently been used as a marker of chronic mountain sickness (CMS). Altitude populations who have a higher Hb concentration also have a higher incidence of CMS. The low Hb in Himalayans suggested as showing adaptation over many generations in Tibetan stock. Recent work in Tibet, suggested that Tibetans there may have adapted to high altitude as a result of evolutionary pressure selecting for genes which give an advantage at altitude. All of the population genomic and statistical analysis indicated that EPAS1 and EGLN1 are mostly likely responsible for high altitude adaptation and closely related to low Hb concentration in Tibetans. These data supported the hypothesis that Himalayan highlanders have evolved a genetically different erythropoietic response to chronic hypoxia by virtue of their much longer exposure to high altitude.
Adaptation, Physiological ; Altitude ; Asian Continental Ancestry Group ; genetics ; Basic Helix-Loop-Helix Transcription Factors ; genetics ; Evolution, Molecular ; Hemoglobins ; genetics ; Humans ; Hypoxia-Inducible Factor-Proline Dioxygenases ; genetics ; Tibet