Background The development of retinopathy of prematurity(ROP) is associated with many regulatory cytokines related to neovascularization;however,the retinal expression and regulated mechanism of stromal cell-derived factor-1 (SDF-1) in mouse model of oxygen-induced retinopathy (OIR) remain uncertain.Objective This study was to investigate the expression of SDF-1 in retina of mouse model of OIR.Methods Forty 7-day-old C57BL/6J mice were divided into OIR group and control group.In OIR group,20 mice were exposed to 75% oxygen for 5 days and then to room air for 5 days.In control group,20 mice were raised in room air.The expression of SDF-1 in retina of mice was studied by immunochemistry and quantified by real time reverse transcriptase polymerase chain reaction (RT-PCR).Results The positive immunohistochemical staining for SDF-1 was found mainly locating at the ganglion cell layer in 12-day-old mice of OIR group;the stronger positive immunohistochemical staining for SDF-1 was noted mainly locating at the ganglion cell layer,vascular endothelial cells of inner retina,neovascular endothelial cells in 17-day-old mice of OIR group;the delicate positive immunohistochemical staining for SDF-1 was both found mainly locating at the inner retina and being around the retinal vascular in 12-day-old mice of control group and 17-day-old mice of control group.The expression of SDF-1 mRNA in 17-day-old mice of OIR group was higher than that of 12-day-old mice of OIR group (t=8.072,P＜0.05)and 17-day-old mice of control group(t=10.026,P＜0.05),respectively.The expression of SDF-1 mRNA in 12-day-old mice of OIR group was lower than that of 12-day-old mice of control group (t=4.336,P＜0.05).Conclusion SDF-1 might improve the onset of retinal neovascularization of OIR.

Adolescent ; Adult ; Aged ; Cavernous Sinus ; injuries ; Female ; Humans ; Hypophysectomy ; adverse effects ; methods ; Intraoperative Complications ; Male ; Middle Aged ; Pituitary Neoplasms ; surgery ; Young Adult

ObjectiveTo study possible mechanism through investigating the pathological and ultrastructural characters of secondary injury to perihematoma in intracerebral haemorrhage (ICH) rats.MethodsSprague Dawley male rats were subjected to ICH models. They were randomly divided into test group and control group. The rats in the test group were divided into 7 subgroups at 1h,3h,12h,24h,48h,72h and 7d after ICH; while those in control group were divided into 3 subgroups at 3h,24h,72h after saline injection. Each subgroup contained 5 rats. 2 rats from each group were stained by 2% triphenyltetrazolium chloride(TTC) to observe the pathological change.3 rats were picked up from each group to do optical microscope and electric microscope investigation on perihematoma tissue and ipsilateral cortex.ResultsHematoma tissue was demonstrated as black brown by TTC staining, no white infarcted area was detected around hematoma. In addition, there was a transitional zone between hematoma and normal tissue under microscopy; the involved tissue looked loose with varied edematous cells. Astrocytes appeared swollen and neural cells looked degenerated and necrosis. Meanwhile, capillary hyperplasia around hematoma with foot plate swollen were detected, no remarkable neural cells change was observed. 24 h after blood injection, astrocytes started to swell, part of them became degenerated and necrosis. Neural cells appeared mild degenerated and blood brain barrier were destroyed. 72 h after ICH, astrocytes showed highly swollen with neural cells degenerated.ConclusionSecondary injury to perihematoma has been identified and the pathological and ultrastructural changes have been observed.

BackgroundSeveral cornea collagen crosslinking methods have been used to treat keratoconus.However,the safety of these methods is dissatisfactory.Glyceraldehyde is a very potent and highly reactive crosslinking agent,with little toxicity,but its effect on corneal biomechanical property is poorly clear.ObjectiveThe aim of this study was to evaluate the biomechanical effects of glyceraldehyde collagen crosslinking on rats cornea.Methods Fifteen clean SD rats were randomly divided into 0.005 mol/L glyceraldhyde group,0.050 mol/L glyceraldhyde group and blank control group.Glyceraldhyde drops was topically administered in the right ryes 2 times per day for consecutive 7 days in the 0.005 mol/L and 0.050 mol/L glyceraldhyde groups,and no any eye drops was used in the blank control group.Seven days later,the rats were sacrificed.Transparency of corneal buttons in these different groups was evaluated.The central corneal strips of 2 mm×6 mm with 2 mm scleral tiasue were obtained for the biomeehanical stress-strain measurement,including ultimate stress ( MPa),ultimate strain (％) and 6％ elastic modulus (MPa).Corneal collagen fibril density was assessed by histological examination under a light microscopy.The use of the animals followed the Regulations for the Administration of Affair Concerning Experimental Animals by State Science and Technology Commission.ResultsThe words could be clearly displayed transcorneally in all the three groups.When strain was 6％,the stress was (0.463±0.065 ) MPa in 0.005 mol/L glyceraldehyde group,(0.846±0.240) MPa in 0.050 mol/L glyceraldehyde group,both showing a significant increase in comparison with (0.195±0.103 ) MPa of the blank control group (P=0.029,0.000 ).Following the crosslinking treatment,the ultimate stress was significant elevated in 0.050 mol/L glyceraldehydes group compared with the blank control group ( ( 10.759 ± 3.337 ) MPa vs.(5.295± 1.313 ) MPa,P =0.007 ),but no significant change between the 0.005 mol/L glyceraldehydes group and the blank control group ( ( 6.043 ±2.084) M Pa vs.(5.295 ± 1.313 ) MPa,P =0.660 ).Corneal ultimate strain was lower in the 0.005 mol/L glyceraldehyde group and 0.050 mol/L glyceraldehyde group than the blank control group (36.57％ ±3.09％ vs.43.87％ ± 1.89％,P =0.009;28.53％ ±1.89％ vs.43.87％ ± 1.89％,P =0.000).However,significantly increased 6％ elastic modulus were seen in the 0.005 mol/L glyceraldehyde group and 0.050 moL/L glyceraldehyde group compared with the blank control group ( ( 7.718 ± 1.076 ) MPa,( 14.102 ± 4.011 ) MPa vs.( 3.252 ± 1.717 ) M Pa),with statistically significant differences ( P =0.029,0.000).Histological examination showed a increase of collagen fiber density in the 0.050 mol/L glyceraldehyde group.Conclusions Corneal collagen crosslinking induced by glyceraldehyde strengthens biomechanical intensity and increases the density of corneal collagen fiber.But the safety of glyceraldehyde crosslinking for keratoconus needs further study.

Objective To compare the infectivity between laboratory adapted human inununodefi- ciency virus(HIV-1) and primary HIV-1 isolates for different mucosal epithelial cell lines. Methods Mu-cosal epithelial cells Caco-2, T-84, HeLa and lymphocyte MT-4 were infected with laboratory adapted HIV-1 SF33 and 2 primary HIV-1 isolates (02010561, 02010141). Culture supernatant and cells were collected respectively on 3-4 days interval after virus inoculation. The former was tested for HIV-1 antigen P24 level and viral load, and the latter was tested for total viral DNA and integrated viral DNA. Results All 3 virus strains could infect MT-4 cells and integrate into their genome. Only HIV-1 SF33 could infect Caco-2 cells but could not integrate into their genomic DNA. Both HIV-1 SF33 and 02010561 infected HeLa cells but only integration of HIV-1 SF33 was detected. All the 3 HIV-1 strains infected T-84 cells but only the integra-tion of HIV-1 SF33 and 02010141 was observed. Conclusion Although laboratory adapted and primary HIV-1 strains are able to infect human mucosal epithelial cell lines, transient or productive infection estab-lished in different mucosal epithelial cells is dependent on the character of cells and virus strains.

To study the protective effect and the mechanism of asiatic acid (AA) from Potentilla chinensis on alcohol hepatic injury in rats. Male Wistar rats were randomly divided into six groups: the normal control group, the AA control group (8 mg · kg(-1) AA), the model group (5.0-9.0 g · kg(-1) alcohol) and high, medium and low-dose AA-treated groups (alcohol + 8, 4, 2 mg · kg(-1) AA). Each group was orally administered with the corresponding drugs once a day for 24 weeks. Approximately 1. 5 hours after the final administration, all rats were killed, and their blood samples and hepatic tissues were collected. The AST and ALT in rat serum and the contents of MPO, TNF-α, IL-1β, SOD, GSH-Px, GSH-Rd and MDA in hepatic tissues were detected. The expressions of NF-κB, TLR4, CD14, MyD88, TRIF and protein expression in hepatic tissues were measured by western blot. The pathological changes in liver tissues were observed by histological examination. The results showed that compared with the model group, the AA-treated groups showed significant decreases in serum ALT, AST and MDA and increases in the activities of SOD, GSH-Px, GSH-Rd and MPO. Moreover, AA markedly inhibited the expressions of TNF-α, IL-1β, TLR4, CD14, MyD88 and NF-κB. The histological examination showed alleviated hepatic issue ijury to varying degrees. In short, asiatic acid (AA) from P. chinensis could protect alcohol-induced hepatic injury in rats. Its mechanism may be related to the inhibition of NF-κB inactivation and the reduction of inflammatory response.
Animals ; Liver ; drug effects ; pathology ; Liver Diseases, Alcoholic ; prevention & control ; Male ; NF-kappa B ; physiology ; Pentacyclic Triterpenes ; pharmacology ; Potentilla ; chemistry ; Protective Agents ; pharmacology ; Rats ; Rats, Wistar ; Toll-Like Receptor 4 ; antagonists & inhibitors

ObjectiveTo examined how autoregulation is affected by vasospasm after subarachnoid hemorrhage (SAH) by using transcranial Doppler. MethodsThe moving correlation coefficient between slow changes of arterial blood pressure and mean or systolic flow velocity (FV), termed Mx and Sx, respectively, was used to characterize cerebral autoregulation. Vasospasm was declared when the mean FV increased to more than 120 cm/s and the Lindegaard ratio was more than 3. This occurred in 15 of 32 SAH patients.On the basis of the bilateral transcranial Doppler recordings of the middle cerebral artery in vasospastic patients, Mx and Sx were calculated for baseline and vasospasm. ResultsMx increased during vasospasm (0.46±0.32) and was significantly higher (P=0.03) than at baseline (0.21±0.24) Sx was also increased (0.22±0.26 vs 0.05±0.21,P=0.03). Mx correlated with mean FV (P=0.577, P=0.006) and the Lindegaard ratio (r=0.672,P<0.01).Mx(P=0.006) and Sx (P=0.044) were higher on the vasospastic side compared with the contralateral side.ConclusionThe increased Mx and Sx during cerebral vasospasm demonstrate impaired cerebral autoregulation. Mx and Sx provide additional information on changes in autoregulation in SAH patients.

ObjectiveTo evaluate the efficacy of rehabilitation associated with local intramuscular injection of botulinum toxic A (BTX-A) on spastic cerebral palsy (CP).Methods60 children with spastic CP were divided into experimental group and control group with 30 cases in each group. Cases of experimental group were treated with rehabilitation associated with local intramuscular injection of BTX-A. Cases of control group were treated only with rehabilitation treatment. The therapeutic efficacies of two groups were evaluated with physician rating scale (PRS) and activities of daily living (ADL) evaluation systems.ResultsImprovement of clinical evaluations index-PRS and ADL in experimental group was much more significant than that of control group (P<0.05). ConclusionRehabilitation associated with local intramuscular injection of BTX-A can improve the efficacy of spastic CP.

Objective To investigate the effect of extracorporeal shock wave therapy (ESWT) on early and mid-term knee osteoarthritis (KOA). Methods 70 patients were randomly assigned to ESWT group (n=34) or control group (n=36). The ESWT group was given shock wave on unilateral knee, while the control group accepted shock wave with the energy density of 0. They were evaluated with Visual Analog Scale (VAS) on movement, Lequesne Index and Western Ontario and McMaster Universities (WOMAC) Osteoarthritis Index before and 12 weeks after the intervention. Results The scores of VAS, Lequesne Index and WOMAC Osteoarthritis Index improved more in the ESWT group than in the control group after intervention (P<0.01). Conclusion ESWT is effective on KOA as a non-surgical treatment.

Objective To study the influence of fluoride on the expression of osteoprotegerin(OPG) mRNA and protein in suckling rat osteoblasts. Methods Osteoblasts obtained from calvarial of suckling Wistar rats were cultured in vitro in the media supplemented with NaF at a series of doses[O(control), 1,2 and 4 mg/L groups], and OPG mRNA expression and protein were evaluated by RT-PCR and ELISA methods, respectively. Results OPG mRNA expression in suckling rat osteoblasts cultured in vitro significantly increased after exposure to NaF for 48 h and 72 h(F=333.48,808.34,P<0.05). OPG mRNA expression in suckling rat osteoblasts cultured in vitro after exposure to NaF for 48 h at different doses(0.810±0.003, 0.819±0.031 and 0.870±0.044 for 1,2 and 4 mg/L groups, respectively) compared with that of control (0.800±0.040, all P<0.05). OPG mRNA expression further increased for 72 h exposure to NaF(0.933±0.047,1.031±0.051,1.240±0.062 for 1,2 and 4 mg/L, respectively), significantly higher than that of the control (0.805±0.020,all P<0.05) and corresponding groups at 48 h. NaF doses and time exposure exhibited a significant synergistic effect on OPG mRNA expression(F=2004.16, P<0.05). NaF also enhanced OPG protein expression in suckling rat osteoblasts cultured in vitro. Significant differences were observed only in 4 mg/L group(0.228±0.014,0.277±0.048) and control(0.205±0.012,0.229±0.010) at 48 h and 72 h (P<0.05). In addition, OPG protein expression at 72 h post-exposure was higher than that at 48 h,but there was no synergistic effect between concentration and time(F=1.21,P>0.05). Conclusions The results suggested that NaF could increase OPG mRNA and protein expression in suckling rat osteoblasts with a synergistic effect between the doses and exposure time.