Objective To explore the protective effect and mechanism of exogenous hydrogen sulfide ( H2 S) on pressure ulcer rats with ischemia/reperfusion ( I/R) injury. Methods Forty SD rarts were randomly divided into 4 groups,namely normal control group,I/R model group,low-dose H2 S intervention group and high-dose H2 S interven-tion group. Each group had 10 animals. The low-and the high-dose H2 S intervention groups were injected intraperitone-ally 10 and 30μmol/kg of sodium hydrosulfide ( NaHS) for 1 week,respectively;however,the normal control group and I/R model group were treated with same volume 9 g/L saline. Then,the normal control group did not sustain any pres-sure,but other 3 groups were pressurized. After 3 circulations of ischemia/reperfusion,all rats were sacrificed,and path-ological changes in pressure ulcer rats were evaluated by HE staining. Serum H2 S contents were analyzed through meth-ylene spectrophotometric method. Serum levels of tumor necrosis factor-α(TNF-α),interleukin-6 (IL-6),intercellu-lar adhesion molecule -1 (ICAM-1),and myeloperoxidase (MPO) were detected by enzyme linked immunosorbent assay ( ELISA ) . The activities of malondialdehyde ( MDA ) , superoxide dismutase ( SOD ) , glutathione-peroxidase ( GSH-Px) and catalase ( CAT) in the homogenate of muscle were examined. Apoptotic index ( AI) was calculated by terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling ( TUNEL) . The expressions of Bcl-2 and Bax in muscle tissue were evaluated by Western blot. Results In comparison with the normal control group,serum TNF-α, IL-6,ICAM-1 and MPO levels,MDA activity in the homogenate of muscles,AI and Bax expression level were in-creased (all P<0. 01),while serum H2S levels,the activities of SOD,GSH-Px and CAT as well as Bcl-2 expression levels were reduced in the I/R model group (all P<0. 01). Upon intervention therapy of low-or high-dose H2S,path-ological scores,serum TNF-α,IL-6,ICAM-1 and MPO levels,MDA activity in the homogenate of muscle,AI and Bax expression levels were gradually reduced while serum H2 S levels,the activities of SOD,GSH-Px and CAT and Bcl-2 expression levels were gradually enhanced when compared to those of the I/R model group (all P<0. 05,0. 01). Con-clusions Exogenous H2 S has better protection against pressure ulcer rats with I/R injury. The mechanism may be as-sociated with inhibition of inflammatory reaction and enhancement of antioxidative ability as well as reduction of apopto-sis.

Objective To analyze MRI findings of cesarean scar pregnancy (CSP). Methods The MR findings in 18 patients who were diagnosed as CSP by surgery from March 2010 to November 2011 were retrospectively analyzed,and comparison was made between the MRI findings and surgical results.Results All Gestational sacs (18) were clearly detected by MRI.Among the 18 cases,gestational sac presented as cystic mass with smooth margin located within the scar of uterine wall at the lower anterior uterus in 16 cases.In 2 of the 16 cases,gestational sac was found within the myometrium,whereas in the remaining 14 cases,gestational sac was found partially within the myometrium with extension into the uterine cavity.The anteior wall of isthmus uteri became thinner.In the remaining 2 of the 18 cases,gestational sac presented as irregular,multilobolated mass,growing deep inot the myometrium as well as into the uterinecavity. On T2WI,the mass showed heterogeneous signal intensity. A small amount of hemorrhage within the mass and uterine cavity could be seen on T1 WI. An enhancing solid component with a heterogeneous mass could be seen. All gestational sacs in 18 cases were located at or adjacent to the previous cesarean scar.In the area of cesarean scar,the signal of the uterine wall was disconnected,with focal indentation or thinning and the previous cesarean scar exhibited hypointensity on both T1WI and T2WI.Conclusion CSP has its unique findings on MRI,these specific features can provide useful information in the management of CSP.

Objective To observe the effect of antitumor and hematopoiesis of the extract of Spatholobus suberctus Dunn (SSCE) in vivo. Methods The mouse model of Lewis lung carcinoma was used to investigate the effects of SSCE on tumor growth and hematopoiesis by detecting the counts of peripheral blood, the counts and classify of the cells in bone marrow. Result The tumor inhibitory rate of SSCE on Lewis lung cancer was 30.65%. SSCE can stimulate the proliferation of bone marrow cells and relieve the marrow depression induced by chemotherapy, at the same time, the physique of the mouse treated by SSCE was not effected. Conclusion SSCE exits antitumor effect, moreover, it can stimulate the bone marrow cells to proliferate and relieve the marrow depression produced by chemotherapy.

BACKGROUND: Nowadays, it is thought that transforming growth factorβ (TGFβ) is closely related with cicatrization. TGFβ that is a key active molecule can affect each phase of cicatrization. Theoretically, to inhibit the biological effect of TGF β can reduce cicatrization.OBJECTIVE: To explore the inhibitive effect of antisense TGF β1 deoxy-oligonucleotide on generation of cicatricle in intention of animal models with hyperplastic scars and observe the effective route of administration of using antisense TGF β1.DESIGN: Own control and animal study.SETTING: Department of Plastic Surgery, Anning Hospital of General Hospital, Lanzhou Military Area Command of Chinese PLAMATERIALS: The experiment was performed at the laboratory of anatomy,Lanzhou Medical College from September 2002 to July 2003. Totally 20flap-eared Japanese rabbits were selected.METHODS: Blood vessels could be seen in ventral surface of each rabbits' ear getting out of the way along long axis to establish two 1.0 cm×2.5 cm oblong full-thickness cutaneous deficiency raw surfaces that interval for 1.5 cm, to the surface of cartilage, totally 80, so asto establish ventral surface of rabbits' ear models with hyperplastic scars. After epithelizatio of raw surfaces of rabbits' ear (20 days, averagely), 5μL(1 g/L) antisense TGF β1 deoxy-oligonucleotide was closely injected into local endepidermis of each raw surface of left ear of each rabbit with microinjector, which was regarded as TGF β1 group. 5 μL saline was injected into each raw surface of right ears, which was regarded as saline control group. After injection for3, 7, 11, 20, 30 days, cicatricial tissues were cut, 4 rabbits in each time phase. Hematoxylin-esoin (HE) staining, Masson staining and TGFβ1 mRNA, type Ⅰ and Ⅲ collagen mRNA in situ hybridization histochemistry staining were applied.MAIN OUTCOME MEASURES: Results of HE staining, Masson staining and in situ hybridization histochemistry staining.RESUTLS: A total of 20 animals were included in the result analysis. ①HE staining showed that inflammatory cell infiltration and significant infiltrative zone of leukocytes occurred in hyperplastic scars of right ears in each group. There was inflammatory cell infiltration, but no infiltrative zone of leukocytes in hyperplastic scars of left ears after intervention with antisense TGF β1. ②Masson staining suggested that collagen fibers with deep blue-stain occurred in hyperplastic scars of right ears from the 3rd week after injury, till the 7th week there still was blue-stain collagen fibers,which was bulky (width of about 8-10 μm) and arranged in a great mess.The blue-stain collagenous fibers also appeared in hyperplastic scars of left ears at the 3rd week after injury by the intervention of antisense TGF β1,but till the 6th and 7th weeks the blue-stain became light and thin (width of about 3-5 μm), arranged in order. ③In situ hybridization revealed that expressive rates of TGF β1 mRNA, type Ⅰ collagen mRNA, type Ⅲ collagen mRNA positive cells decreased obviously.CONCLUSION: Antisense TGF β1 can inhibit the proliferation of hyperplastic scars of rabbits' ears and lighten markedly the fibrosis of cicatricial tissue. The local injection with naked DNA is feasible in the treatment of cicatricle.

Objective To explore the application and clinical effects of nursing procedure of in the patients of Ebola virus dis-ease (EVD).Methods We went on nursing assessments to the 5 EVD patients by applying nursing procedure and made the nursing diagnosis based on the results of nursing assessments.Then we analyzed the possible reasons of common nursing problems and made anticipated goals and carried out the nursing strategies.We evaluated the efficiency of nursing eventually.Results We carried out nursing procedures in 5 EVD patients.No complication was occurred in all patients.Three patients fully recovered and dis-charged from our hospital.We got a good treatment results and achieved good social benefits.Conclusion System nursing to EVD patients,which accords to nursing procedure,helps us reducing the nursing complications,and decreasing the mortality of patients.

Objective To study the characteristics of diffusion tensor imaging (DTI) in brain tumor and it's diagnosis and differential diagnosis value.Methods Thirty-nine patients with brain tumors proven by pathologically (10 meningioma,17 glioma,12 metastatic tumors) were enrolled,by using Philips Achieva 1.5 T MRI,conventional MRI and DTI were underwent on them,fractional anisotropy (FA) maps,apparent diffusion coefficient (ADC) maps and three dimensional white matter fiber bundle map were reconstructed in the workstation.The core substance of the tumor area and the contralateral mirror area were selected as the region of interest,and FA and ADC values of them were measured,and t test was performed.Results The FA values of meningioma,metastases tumors and gliomas were 0.36 ± 0.08,0.28 ± 0.03,0.18 ± 0.06,respectively,and the differences among them were significant( P ＜ 0.05).The ADC values of meningioma,metastases tumors and gliomas were 1.72 ± 0.10,1.52 ± 0.22,1.34 ± 0.14,respectively,and the differences among them were significant( P ＜ 0.05).Conclusion DTI has high clinical value in identification of meningiomas,metastatic tumors and glioma.

OBJECTIVE: The purpose of this investigation was to observe the effects of the Acetaminophen on auditory in mice. METHOD: Regardless of male and female mice, healthy seven-year-old C57 mice were randomly divided into Acetaminophen low-dose group (150 mg/kg), Acetaminophen medium-dose group (300 mg/kg), Acetaminophen high-dose group(600 mg/kg) and control group. Then mice were tested for ABR to observe the changes of ABR's threshold in the zero, second, fourth and ninth day separately. The change of cochlea hair cells morphology was studied by immunofluorescent labeling. And HPLC detects the concentration of Acetaminophen in endolymph of mice cochlea. RESULT: After 30 minutes following administration, the Acetaminophen in endolymph of mice cochlear can be assayed by high performance liquid chromatography (HPLC). Acetaminophen increased the hearing thresholds compared to the control group. Hearing thresholds increased significantly in the Acetaminophen at 9 d,compared to the control group (P < 0.05). After administered medium-dose and high-dose of Acetaminophen, on the 9th day with the time of giving medicine to all the groups strengthens, the ABR thresholds heightens. And the average threshold is (44.75 +/- 16.00) dB, (50.00 +/- 11.00) dB respectively. Hair cells damages could be observed in experimental group after operations. CONCLUSION Acetaminophen can pass through blood-labyrinth barrier to the inner ear. These data demonstrate that taking certain acetaminophen can induce hearing impairment in mice.
Acetaminophen ; toxicity ; Animals ; Female ; Hair Cells, Auditory ; drug effects ; pathology ; Hearing ; drug effects ; Male ; Mice ; Mice, Inbred C57BL

Objective To identify synovium-associated proteins of by analyzing proteome of FLS between RA patients and traumatic arthritis. Methods The total protein of FLS from 3 patients of RA and 6 normal controls were separated by 2-DE. The differentially expressed proteins were identified by MALDI-TOF-MS. Results The 2-DE image results showed that there were many proteins differentially expressed in FLS from RA and control. A total of 33 differential proteins that were up-regulated in RA as compared with controls were selected and 30 proteins including pyruvate kinase isozymes M1/M2, α-enolase, protein disulfide-isomerase A3 precursor, glutathione transferase, peroxiredoxin 1, ubiquitin-conjugating enzyme E2K, platelet-activating factor acetylhydrolase IB, dihydropyrimidinase-related protein 2, adenosine kinase, transaldolase, δ-δ-dienoyl-CoAisomerase, 26S protease regulatory subunit 6A, annexin All, tryptophanyl-tRNA synthetase isoform b, lamin-A/C, myomesin-1 isoform b, ruvB-like 1, actin-cytoplasmic 1, T-complex protein 1, stress-70 protein, mitochondrial precursor, α-crystallin B chain, 78 000 glucose-regulated protein, PSME4, SELENBP1 and so on. Conclusion The differentially expressed proteins are present in FLS from RA and control, which may be the synovium biomakers and involved in pathogenesis of RA.

Objective To observe the effects of interleukin-1β (IL-1β) and pentylenetetrazol (PTZ) induced acute epilepsy and the dynamic expression of aquaporin-4 (AQP4) in hippocampus. To explore the role of IL-1β in the pathogenesis of epilepsy by regulating AQP4. Methods All rats were randomly divided into control group, IL-1β group, PTZ group, IL-1ra + PTZ group and dexamethasone + PTZ group. Observe the behavior of the rats within 60 minutes after injection and record seizure score in each group. Then immunohistochemistry and RT-qPCR were used to detect the expression of AQP4 at at 6 , 12, 24 and 36 h. Results Almost of rats in IL-1β group and PTZ group showed severe degree seizure. The rats in control group and dexamethasone + PTZ group showed no obvious seizure. The seizure of rats were more remarkable serious in PTZ group than that in the IL-1ra + pentylenetetrazole group (P < 0.05). Immunohistochemistry and RT-qPCR Show: the expression of AQP4 in hippocampus in PTZ group increased gradually after 12 h (P < 0.05), then reached in the peak after 24 h (P < 0.001). The expression of AQP4 in IL-1ra + PTZ group was lower compare with PTZ group in each time (P < 0.05). Although the expression of AQP4 in dexamethasone + PTZ group higher than the control group, it was not significantly different (P < 0.05). Conclusion The proinflammatory cytokine IL-1β break the balance of water in brain and increasing the concentration of extracellular excitatory amino acids or ions by upregulate the expression of AQP4 in order to promote the excitatory of neurons.

Aim To investigate the molecular mecha-nism for the inhibitory effect of puerarin on IL-6 secre-tion in human osteoblast-likeMG-63 cells. Methods According to our previous studies, human osteoblast-like MG-63 cells containing two estrogen receptor ( ER) isoforms are a suitable model for this study. En-zyme-linked immnosorbent assay (ELISA), RT-PCR, luciferase reporter assay and small interfering RNA were performed to investigate the effect of puerarin on IL-6 expression in osteoblast-derived cells and underly-ing molecular mechanism. Results Puerarin could obviously inhibit IL-6 expression and IL-6 promoter ac-tivity by human osteoblastic MG-63 cells. Treatment with the ER antagonist ICI 182,780 abrogates the a-bove actions of puerarin on osteoblast-derived cells. U-sing siRNA technology, we further demonstrated that the effects of puerarin on IL-6 production were media-ted by ERα. Conclusion The effect of puerarin on IL-6 production in osteoblast is mediated by ERα.