Erythropoietin(EPO) has an anti-apoptotic effect,and promotes the proliferation and differentiation of erythroid progenitor cells. Several studies have indicated that EPO can protect photoreceptor cells from the lightinduced retinal degeneration ;protect retinal neurons from ischemia-reperfusion injury and retinal ganglion cells after acute and chronic ocular hypertension; promote ganglion cell survival and axonal regeneration after optic nerve transaction; attenuate inflammation in multiple sclerosis optic neuritis; reduce the permeability of the retinal barrier and protect retinal neurons in diabetic retinopathy; enhance the stability of hypoxic retinal vessels in retinopathy of prematurity. Herein,we review the distribution of EPO and its receptor in retina,their expression in animal model of retinal diseases,and their effects and mechanisms in protection of retinal neurons and optic nerve.

Brain ; pathology ; Cerebral Hemorrhage ; pathology ; Female ; Humans ; Infant, Newborn ; Infant, Premature ; Leukomalacia, Periventricular ; pathology ; Magnetic Resonance Imaging ; methods ; Male

Objective To explore the predictive value of ventricle late potential (LP) for arrhythmic events in the patients with Brugada syndrome. Methods Totally 43 patients with Brugada syndrome were divided into symptom group (n=24) and asymptom group (n=19).Signalaveraged electrocardiography(SAECG) was performed to analyze characteristics of LP in all subjects.The occurrence of arrhythmic events was observed in all patients during the dynamic follow-up for (33.8±9.0) months.Results There were 22 cases (91.7％) and 7 cases (36.8％) with LP positive in patients with symptom and asymptom,respectively.The incidences of arrhythmic events were 72.4％ in Brugada syndrome patients with positive LP and 14.3％ in patients with negative LP,respectively.The relative risk (RR,95％ CI) for LP prediction of the arrhythmic events was [5.1,(1.4～ 18.6)] (P =0.002). ConclusionsLP may be one of effective factors predicting arrhythmic events in the patients with Brugada syndrome.

Objective To explore the effect of Okam on airway inflammation in asthmatic mouse.Methods Thirty-two SPF grade Kunming Strain mice were randomly divided into positive control group,glucocorticoid inhalation group,Okam group and negative control group with 8 mice in each group.The mice were sensitized and repeatedly challenged with ovalbumin(OVA) to establish the models of chronic asthma.The glucocorticoid group were given Budesonide(200 ?g) and saline everyday by inhalation,the Okam group were given 50 mg/kg Okam by gavage,and the positive group had saline at the same time,the negative control group received saline at all stages.The inflammation of the lung tissue were scored underwent HE staining.Bronchoalveolar lavage fluid(BALF) cell count and differential were studied,and interferon-?(IFN-?),interleukin-4(IL-4) in BALF were determined by enzyme-linked immunosorbent assay(ELISA).Results There were no inflammatory cell infiltrate of bronchiole in the negative control group.Inflammatory infiltration of lung tissue were obvious in the positive control group.Inflammatory infiltration of lung tissue lightened obviously in the Budesonide and Okam groups.The total cell number,Eosinophils(EOS) and IL-4 level in BALF,and the score of the lung tissue in Okam group were all markedly lower than those in positive control group(t=5.942,7.089,7.078 Pa0.05),IFN-? lower(t=4.275 P

Objective To explore the expression of Metastasis-associated in colon cancer-1 (MACC1) in patients with nasopharyngeal carcinoma (NPC), and its relationship with clinical pathologic characteristics and prognosis Methods The expression of MACC1 was detected in 130 cases of NPC and the relationship among the MACC1 expressions, clinical pathologic characteristics and prognosis of NPC was analyzed. Results Positive expression rate of MACC1was 68.5% in the NPC and MACC1 expression was associated with advanced T stages, lymph node metastasis and advanced clinical stages of NPC (P < 0.05). The results of Kaplan-Meier survival analysis showed that the five year overall survival rate in patients with positive expressions of MACC1 (45.9%) was significantly lower than that of those with negative expressions (73.7%) and the difference was statistically significant (P < 0.05), Cox multi-factor analysis results showed that MACC1 expression was an independent prognostic factor for NPC (P = 0.004). Conclusion MACC1 abnormal expression is closely related to the invasion and metastasis of NPC and it is expected to become a new target for gene therapy of NPC.

Objective To investigate the apoptosis of T lymphocytes,the expression of Bcl-2, Fas on the peripheral blood T lymphocytes in end stage renal disease patients;and to explore the characteristics of Th1 /Th2 profile and the influence of dialysis membranes with different permeability on the apoptosis of T lymphocytes of maintenance hemodialysis patients.Methods The study included 10 non-dialyszed (ND)patients,45 maintenance hemodialysis patients with cellulose acetate (CA) membranes(13),low-flux polusulfone(PS-LF) membranes(16),high-flux polusulfone (PS-HF) membranes (16) and 8 healthy volunteers (C).The apoptosis of T lymphocytes,expression of Bcl-2,Fas on peripheral blood T lymphocytes cultured with phytohemagglutinin (PHA) stimulation for 24 hours were measured by flow cytometry and immunohistochemical.ELISA was performed for detecting the levels of IFN-?and IL-4 in culture supematants.Results In ESRD patients,the apoptosis of T lymphocytes was greater than that of group C.Group CA was greater than group PS-HF and group PS-LF (P＜0.05).The expression of Bcl-2 on T lymphocytes in ESRD patients was lower than that of group C (P＜0.05).There was negative correlation between the T lymphocytes apoptosis and Bcl-2. The expression of Fas on T lymphocytes in ESRD patients was greater than that of group C (P＜0.05), and it was positive correlated with T lymphocytes apoptosis.The level of IFN-?of ESRD patients was decreased significantly compared with that in group C (P＜0.05),and there was negative correlation between T lymphocytes apoptosis and IFN-?.IL-4 was increased in ESRD patients (P＜0.05) and it was positive correlated with T lymphocytes apoptosis.Conclusions The accelerated apoptosis of T lymphocytes in ESRD patients may be related to the expression of Bcl-2 and Fas of T lymphocytes.ESRD patients show a suppressed secretion of IFN-?and an increased secretion of IL-4. T lymphocytes apoptosis of maintenance hemodialysis patients is influenced not only by the biocompatibility but also by the permeability of the dialysis membrane.

Objective To explore the value of waring score of potential critical disease in predicting changes in condition of patients with multiple injuries. Methods From January 1, 2013 to July 31, 2013, all patients with multiple injuries were included prospectively. Patients were observed as soon as ICU admission. The waring score of potential critical disease and MEWS of all patients and the rates of changes in condition of patients were calculated then statistic analysis was performed. Results Of 50 patients enrolled, 44 were survived and 6 were died and 295 changes were found. The maximum , minimum median (P25, P75) of waring score of potential critical disease were 22, 0, 5 (3, 7). The maximum, minimum median (P25, P75) of MEWS were 12, 0, 4 (2, 6). The area under the ROC of waring score of potential critical disease was 0.880 (95% CI, 0.813-0.947, P < 0.001). Youden index was the biggest when waring score of potential critical disease was 6.5. The area under the ROC of MEWS was 0.767 (95% CI, 0.661-0.873, P < 0.001). Youden index was the biggest when MEWS was 5.5. Conclusion The waring score of potential critical disease was effective to predict changes in conditions of patients with multiple injuries and better than MEWS.

Objective: To investigate the association between body mass index ( BMI ) and mortality risk among older Chinese based on the China Health and Retirement Longitudinal Study ( CHARLS ). Methods: The demographic features, BMI, prevalence of chronic diseases and mortality among the elderly at ages of 60 years and greater were captured from the CHARLS database from 2011 to 2018. A multivariable Cox proportional hazards regression model was used to examine the association between BMI and the risk of death. Results: Totally 6 023 subjects were enrolled, including 3 006 men ( 50.09% ) and 3 017 women ( 49.91% ), and 68.69% of the participants ( 4 137 subjects ) were at ages of 60 to 69 years. There were 637 subjects ( 10.58% ) with underweight, 1 544 ( 25.63% ) with overweight, and 557 ( 9.25% ) with obesity. During the follow-up period ( 35 091 person-years ), 1 035 subjects died. Multivariable Cox proportional hazards regression analysis revealed an increased risk of mortality among the underweight elderly ( HR=1.496, 95%CI: 1.261-1.775 ) and a reduced risk of mortality among the obese elderly ( HR=0.671, 95%CI: 0.511-0.881 ) relative to the elderly with normal weight, after adjustment for age, gender, smoking, household registration, administration of anti-diabetic drugs, administration of anti-dyslipidemia drugs, and administration of anti-hypertensive drugs. Conclusion It is found that the risk of mortality among the Chinese elderly correlatives with BMI through the analysis of CHARLS data.

Background Erythropoietin (EPO) has a protective effect on retinal neurons in many retinal diseases,but regarding the effect of EPO on apoptosis of retinal photoreceptor cells in retinal detachment (RD) is uncompletely clear.Objective This study was to investigate the protective effect of endogenous EPO on photoreceptors in a rat model of RD and explore its possible mechanism.Methods Seventy-two Sprague- Dawley (SD) rats were randomly assigned to control group,RD group,RD+PBS group,RD+erythropoietin soluble receptor (EPOsR) 2, 20, 200ng groups with 12 rats for each group.1.4% hyaluronic acid was slowly injected into the subretinal space to induce RD in rats,and PBS or 2,20 or 200ng EPOsR was then injected into the vitreous space.On day 3 after RD,apoptotic photoreceptors were detected using transferase-mediated dUTP nickend labeling (TUNEL),and caspase-3 activity was assessed by Western-blot and immunofluorescence staining.On day 14 after RD,retinal histopathologic examination was carried out and outer nuclear layer (ONL) thickness was measured under the light microscope.The use of animals complied with the Statement of Association for Research in Vision and Ophthalmology. Results Apoptotic photoreceptors were seen in ONL of rats of the RD group.Apoptotic photoreceptors were gradually increased with the elevation of EPOsR dose in the vitreous cavity.Western blot and immunofluorescence consistently showed that the gray scale of caspase-3 activity was 0.15±0.04,0.49±0.03,0.50±0.07,0.63±0.03,0.69±0.04 and 0.83±0.04 in the normal group,RD group,RD +PBS group,RD+EPOsR 2,20,200ng groups respectively with statistically significant differences (F=76.016;P=0.000),and caspase-3 activity was considerably stronger in the RD+EPOsR 200ng group than the other groups (P＜0.01).On day 14 after RD,the ONL thicknesses in the normal control group,RD group,RD+PBS group,RD+EPOsR 2,20,200ng groups were (47.39±3.39)μm,(33.96±3.54)μm,(31.83±5.21)μm,(31.40±2.63)μm,(24.99±2.06)μm and (19.30±3.71)μm,showing significant differences among these groups (F=44.733,P=0.000).ONL thicknesses the groups treated with different doses of EPOsR were markedly thinner than that of the RD group and RD +PBS group (P＜0.01).Conclusion EPOsR induces apoptosis of retinal cells and enhances the activity of caspase-3 in a dose-dependent manner.Endogenous EPO can protect photoreceptors against anoxia-mediated damage in RD eyes through decreasing caspase-3 activity and inhibiting apoptosis.

BackgroundOur previous study showed that erythropoietin (EPO) protects the photoreceptor from apoptosis in retinal detachment(RD) rat,but its signal transduction pathway remains unknown.Objective The present study was to investigate the effects of EPO on signal transduction pathway in RD.MethodsTwentyfour albino clean Sprague-Dawley(SD) rats were randomly divided into 4 groups.5 μl PBS was injected into vitreous cavity of rats in RD+PBS group,and 400 ng EPO(5 μl) was used at the same way in RD+EPO group.Three days later,the rats were sacrificed and the retina was isolated in each group.The expression levels of Janus kinase 2 (JAK2),p-JAK2,Akt,p-Akt,extracellular regulated protein kinase-1/2 ( ERK-1/2 ),p-ERK-1/2,signal transducer and activator of transcription 5 ( STAT5 ),p-STAT5,nuclear factor-kB (NF-sB) and p-NF-kB were detected by Western blot assay.The administration of experimental animals followed the Standard of ARVO.ResultsThree days after RD,the expression levels of JAK2,Akt and ERK-1,ERK-2 in retinas among normal group,RD,RD+PBS,RD+EPO groups were statistically insignificant different ( F =0.298,P =0.826 ; F =0.681,P =0.588 ; F =0.978,P=0.450;F=1.115,P=0.399 ),but the levels of p-JAK2,p-Akt,p-Erk-1 and p-Erk-2 among these 4 groups were significant difference ( F=24.435,P =0.000; F=48.163,P =0.000;F =19.092,P =0.001; F =14.393,P=0.001 ),and those in RD+EPO group was significantly higher than that in RD and RD+PBS groups( P＜0.05 ).The expression levels of STAT5 and NF-kB among the 4 groups were no significantly differences (F =1.136,P=0.391 ;F=0.696,P=0.580),but after the phosphorylation of STAT5 and NF-kB,the differences was significant ( F =14.189,P =0.001 ; F =40.103,P =0.000 ).Those in RD,RD + PBS,RD + EPO groups did not increase either (P＞0.05).Although the levels of p-STAT5 and p-NF-kB in RD,RD+PBS,RD+EPO groups were significantly higher than those in normal control group( P＜0.05 ),the level of p-STAT5 in RD+EPO group was not significantly higher than that in RD and RD + PBS groups (P ＞ 0.05 ). Conclusions PI3K/Akt and MAPK/ERK-1/2 signal transduction pathways might participate in the protecting process of EPO to photoreceptor in RD rats.