OBJECTIVE To observe the inhibition of the expression of HIF-1? and VEGF induced by LPS in primary human nasal epithelial cell (HNEC) by dexamethasone. METHODS Epithelial cells of nasal polyps (NP) and inferior turbinate (IT) were cultured without serum under stimulus of LPS 100 ng/ml, IL-1? 20 ng/ml, LPS 100 ng/ml +dexamethasone 13 ng/ml and IL-1? 20 ng/ml+ dexamethasone 13 ng/ml for 3h, 6h and 9h respectively. The expression of HIF-1?, VEGF protein and mRNA derived from epithelial cells was detected by immunocytochemistry and situ hybridization. RESULTS ①The expression of HIF-1? and VEGF increased under the stimulus of LPS and IL-1? with the increasing of time and concentration, especially under LPS 100 ng/ml for 6h (P

Objective To evaluate the influence of narrow-band ultraviolet B on lesional microvessel density (MVD),vascular endothelial growth factor (VEGF),matrix metalloproteinases 2 (MMP-2)as well as on serum VEGF in patients with psoriasis vulgaris(PV).Methods Fifteen patients with PV were recruited into this study with 10 normal human controls.All patients received NB-UVB phototherapy thrice a week for 4-5 weeks.Prior and after the treatment,psoriasis area and severity index (PASI)was calculated,tissue specimens were taken from non-photoexposed lesions,and sera samples were obtained from these patients.Then,MvD and the expression level of VEGF and MMP-2 were measured by immunohistochemical labeled dextran polymer(LDP)method in the tissue specimens.Also,the serum level of VEGF was tested by enzyme-linked immunosorbent assay(ELISA).Results PASI score remarkably decreased in patients after the photothempy(t=13.35,P＜0.01).The MVDs were 20.52±5.02,7.33±1.24 and 4.26±0.79 capillaries per high power field(400 × amplification),in psoriatic lesions before treatment,after treatment,and normal control tissues,respectively,with a significant difference among the three groups (F=97.57,P＜0.05),and a significant increase was observed in the lesions before treatment compared with those after treatment and normal controls.The serum level of VEGF was 307.55±121.65 ng/L in psoriatic lesions before treatment,significantly higher than that after treatment(163.92±95.57 ng/L),and in normal control skin (139.78±79.06 ng/L),whereas there was no significant difference between the latter two groups(P＞0.05).The positivity rate of MMP-2 was similar among the three groups without statistical difference(P＞0.05).In psoriatic patients,a positive correlation was observed among PASI score,MVD,lesional and serum VEGF levels(P＜0.05),also among the MVD,VEGF and MMP-2 levels in lesions(P＜0.05).but lesional MMP-2 was unrelated to PASI score or sgrum VEGF(both P＞0.05).Conclusions NB-UVB may regulate superficial dermal microvascular proliferation by acting on the expression of VEGF in sera and lesions of psoriatic patients.VEGF and MMP-2 may bOth participate in the proliferation process of microvessels,while MMP-2 is unlikely to be involved in the therapeutic mechanism of NB-UVB.

Objective To observe senile plaque and iron deposition in cortex and hippocampus of the Alzheimer's disease ( AD ) transgenic mice and investigate their influence on T2 relaxation time.Method All AD transgeic mice were divided into three groups: young group(2,4 months), adult group (6,8,10 months), old group (12,14,16 months), and C57BL/6J mice were as control and were scanned in order by using 4.7 T MR system.Regions of interest (ROI) corresponding to cortex, hippocampus,thalamus, striatum were manually drawn on MR images and T2 MR relaxation times of each ROI were calculated.After MR scan, these mice were decapitated and stained for iron and senile palques.The number of plaque and iron, plaque burden, iron load in cortex and hippocampus were acquired using image pro plus software.Result T2 relaxation times of each group were as following: wild type ( cortex (49.5 ± 2.1 ) ms,hippocampus (51.6 ± 1.1 ) ms ); young ( cortex ( 49.7 ± 0.5 ) ms, hippocampus ( 50.7 ± 0.7 ) ms ); adult (cortex(47.2 ±0.8) ms, hippocampus(47.7 ±0.9) ms) and old (cortex(44.6 ±0.8) ms, hippocampus (45.3 ±0.4)ms).T2 relaxation times in cortex and hippocampus of each group had statistical differences ( cortex F = 18.620, P ＜ 0.01; hippocampus F = 67.925, P ＜ 0.01 ); Compared with young group and wild type mice, T2 relaxation times in corex and hippocampus of adult group mice were decreased significantly.At the same time, T2 relaxation times in old group mice were reduced compared with adult group ( Adult vs young: cortex q =4.284, P ＜0.01, hippocampus q =7.902, P ＜0.01; adult vs wild type: cortex q =4.424, P＜0.05, hippocampus q = 11.450, P ＜0.01; old w adult: cortex q =4.812, P ＜0.01,hippocampus q = 7.034, P ＜ 0.01 ).Histochemical staining for senile plaques found that senile plaques was deposited as early as 4 month.Iron deposition in hippocampus and cortex were detected by perl-DAB as early as 6 months of age, and there was an overall increase in number and load of plaques and iron with age.A positive correlation was observed between plaque burden and iron load ( r = 0.931, P ＜ 0.01 ).At the same time, plaque burden and iron load were negatively correlated with T2 relaxation times ( plaque burden and T2 relaxation times r = - 0.884, P ＜ 0.01; iron load and T2 relaxation times r = - 0.827, P ＜ 0.01 ).Conclusion The changes of T2 relaxation time in AD transgenic mice are attributed to iron and senile plaques.MR T2 relaxation time is a sensitive marker to diagnosis for AD and screen antidementia drugs.

Objective To investigate the effects of acupoint massage on labor analgesia efficacy and it's related clinical factors,so to definite the analgesia mechanism and the relationship between the neurotransmitter dopamine and analgesia mechanism.Methods We choosed patients who have been hospitalized in No.1 hospital from March 2009 to September 2009,and divided them into two groups randomly: observation group and control group.Patients in the observation group were treated with acupuncture massage when the production process went into the active phase.Control group indicated that childbirth was naturally without any treatment.We observed the analgesic effect of point massage and the impact of pressure on the uterine contractions.We tested the dopamine level in the blood by fluorescent spectrophotometry before and afte the acupoint massage.We explored the effects of the point massage on the dopamine level in the puerpera.Results The observation group′s pain decreased more than that of the control group.The intensity of contractions in observation group was decreased more obvious than that of the the control group.The serum dopamine levels was significantly lower than that pre-massage(P

OBJECTIVE: To observe the expression and the role of hypoxic inducible factor-1alpha and VEGF induced by infection factor, inflammatory factor and hypoxia in primary human nasal epithelial cell (HNEC). METHOD: Epithelial cells of nasal polyps (NP) and inferior turbinate (IT) were cultured without serum under stimulus of LPS10, 100, 1000 microg/L, IL-1beta 20 microg/L and hypoxia for 3 h, 6 h, 9 h, respectively. The expression of HIF-1alpha and VEGF protein and mRNA derived from epithelial cells was detected by immunocytochemistry and in situ hybridization. RESULT: 1) Under hypoxia, EPO mRNA was expressed intensely in epithelial cells from NP and IT, and there was no significant difference between both of them. This result suggested that EPO might be regarded as a hypoxic mark; 2) The expression of HIF-1alpha and VEGF increased under the stimulus of infection factor, inflammatory factor and hypoxia with the increasing of time and concentration, especially in hypoxia (P<0.05); 3) The expression of HIF-1alpha and VEGF expressed more intensively in epithelial cells from NP than IT under all conditions (P<0. 05); 4) There was positive correlation between the expression of HIF-1alpha and VEGF (r=0.870, P<0.05). CONCLUSION Epithelial cells actively produce vast HIF-1alpha and VEGF under infection factor, inflammatory factor and hypoxia. HIF-1alpha and VEGF are involved in the formation of nasal polyps.
Adult ; Aged ; Cell Hypoxia ; Cells, Cultured ; Epithelial Cells ; cytology ; metabolism ; Female ; Humans ; Hypoxia-Inducible Factor 1, alpha Subunit ; metabolism ; Interleukin-1beta ; pharmacology ; Lipopolysaccharides ; pharmacology ; Male ; Middle Aged ; Nasal Mucosa ; cytology ; metabolism ; Nasal Polyps ; metabolism ; Sinusitis ; metabolism ; Vascular Endothelial Growth Factor A ; metabolism ; Young Adult

Objective To discuss the incidence of depression in patients with first-ever mild-moderate ischemic stroke and analyze the related risk factors.Methods The first-ever acute ischemic stroke patients,admitted to our hospital from March 2014 to October 2014,were screened.All patients were examined by MR imaging.The patients were divided into post-stroke depression (PSD) group and non-PSD group through Hamilton's Depression Scale (HDRS).The cognitive functions of the patients of the two groups were evaluated using mini-mental state examination (MMSE);the impairment of neurological function was evaluated by using National Institutes of Health Stroke Scale (NIHSS);the dysfunction caused by stroke using modified Rankin scale (mRS).The demographic data,stroke risk factors,location and number of the lesions of the two groups were compared.The variables between the two groups with statistically significant differences were chosen for multivariate Logistic regression analysis.Results All 118 patients were selected in this study through the inclusion criteria,including 43 of the PSD group and 75 of the non-PSD group.The PSD incidence was 36.4％.The prevalence of diabetes in PSD group was significantly higher than that in the non-PSD group (P＜0.05);and the incidence of involvement of cortical and subcortical multifocal lesions in patients with PSD was signficantly higher than that in the non-PSD group (P＜0.05).Logistic regression analysis found that multiple focal lesions (P=-0.018) and NIHSS scores (P=0.005) were the independent risk factors of PSD.Conclusion The PSD occurrence is the outcome of combined action of multiple factors;the patients with diabetes,cortex and subcortical multifocal lesions and severe neural function defect are more likely to have PSD.