Objective To evaluate the protective effect of insulin-like growth factor-1 (IGF-1) on hypoxic-ischemic brain damage (HIBD) in newborn rats. Methods One hundred and twenty 7-day-old Wistar rats were randomly divided into sham control,HIBD,HIBD treated with 0.2 mg/kg RH-IGF-1 ,HIBD treated with 0.066 mg/kg RH-IGF-1,and normal saline control groups. Those groups were further divided into 24 h、 48 h and 72 h groups respectively after damage with 8 rats in each group. The histological feature,levels of glutamate (Glu) and apoptosis,and expression of Bcl-2 protein in brain were observed in each group. Results (1) Level of Glu in HIBD 48 h group (1162.2?108.1) mg/kg and levels of apoptosis in every HIBD groups[24 h: (7.6?1.9),48 h: (12.6?1.2),72 h: (13.8?0.9) %] are significantly higher than those in sham groups of the same time,[Glu: (750.9? 53.4) mg/kg and apoptosis: 24 h: (2.0?0.2)%,48 h: (2.0?0.3)%,72 h: (2.0? 0.2)%] respectively ( P

Traditional capsule image collects and transmits analog image, with weak anti-interference ability, low frame rate, low resolution. This paper presents a new digital image capsule, which collects and transmits digital image, with frame rate up to 30 frames/sec and pixels resolution of 400 x 400. The image is compressed in the capsule, and is transmitted to the outside of the capsule for decompression and interpolation. A new type of interpolation algorithm is proposed, which is based on the relationship between the image planes, to obtain higher quality colour images. capsule endoscopy, digital image, SCCB protocol, image interpolation
Algorithms ; Capsule Endoscopy ; instrumentation ; Equipment Design ; Image Processing, Computer-Assisted

Because the huge number of images of the digestive tract by Wireless Capsule Endoscopy (WCE) are left to the medical personnels detected by their eyes, huge burden leaves to doctors. This article provides a classification of method based on SVM (Support Vector Machine) for the capsule endoscopy bleeding intelligent recognition. We created a new kind of feature parameter, and the experiment result can reach 83% specificity and 94% sensitivity.
Capsule Endoscopy ; Gastrointestinal Tract ; pathology ; Hemorrhage ; diagnosis ; Humans ; Sensitivity and Specificity ; Support Vector Machine

The article was aimed to study the influence of low pressure and hypoxia on rat metabolism and evaluate the intervention effect of San-Guo-Tang-San (SGTS) on high altitude polycythemia (HAPC) rats. A total of 25 rats were divided into the plain control group, high altitude model group, Hong-Jing-Tian capsule (Nuo-Di-Kang cap-sule) group, high-dose SGTS group and low-dose SGTS group, with 5 rats in each group. After one week adaptation, rats in the model group and the medication groups were put into the hyperbaric chamber for 40 days (22 h/d) to simulate high altitude environment of 5 000 m. In the end of 40th day, the hemorheology and the dry/wet weight ratio of lung of rats were measured. And plasma samples were derivatized with ECF prior to GC-MS instrumental analysis. Principal component analysis (PCA) was used to find potential biomarkers, and evaluate the intervention effects of SGTS. The results showed that the low pressure and hypoxia changed the hemorheology and dry/wet weight ratio of lung of rats markedly. Metabolomics studies showed that the high altitude model group, high-dose SGTS group, low-dose SGTS group, and Hong-Jing-Tian capsule group can be obviously differentiated. Main markers such as 9-hexylheptadecane, glycine, N-methyl-N-methoxycarbonyl-ethyl ester, 2,4-Di-tert-butylphenol, were found to be the endogenous substances of SGTS which intervening the HAPC rats. It was concluded that SGTS can intervene low pressure and hypoxia induced HAPC.

AIM: To examine the relationship between corneal lymphangiogenesis and hemangiogenesis after keratoplasty.METHODS: Nineteen human corneas were obtained from 19 patients undergoing a second corneal transplantation in Zhongshan Ophthalmic Center in 2005. Blood and lymphatic vessels in human transplanted corneas were identified by lymphatic vessel endothelial receptor(LYVE-1) and platelet endothelial cell adhesion modecule-1(PECAM-1) immunohistochemistry, and double enzyme-histochemistry; then the association of corneal blood vessel counting (BVC) with lymphatic vessel counting (LVC) was examined.RESULTS: Corneal hemangiogenesis was present in 12 cases (63%), and lymphangiogenesis occurred in 5 cases (26%) of human transplanted corneas. In addition, corneal lymphangiogenesis was only present in vascularized corneas. LVC was strongly and positively correlated with BVC(r=0.725;P<0.01).CONCLUSION: Corneal lymphangiogenesis develops after keratoplasty, and strongly associates with hemangiogenesis.

Purpose To investigate the expression of Cav-1 in gastric cancer ( GC) cell lines and GC samples, and to analyze the pos-sible effect of gene methylation in expression of Cav-1. Methods Methylation specific PCR ( MSP) method was applied to examine the CpG methylation of the Cav-1 promoter in GC cell lines (AGS, MKN45, BGC-823) and 104 samples of GC and corresponding ad-jacent tissues. RT-PCR method was applied to examine the mRNA expression in GC cell lines. IHC were applied to examine the pro-tein expression of Cav-1 in the GC tissues. Results The expression level of Cav-1 mRNA was obviously increased after treated with 5-aza-2’-deoxycytidine (5-Aza-Dc, a demethylation agent) in AGS cell line. We detected the positive expression of Cav-1 gene in MKN45 and BGC-823 cell lines before and after treated with 5-Aza-Dc. The level of Cav-1 mRNA expression was no any change in AGS, MKN45 and BGC-823 cell lines treated with trichostatin A (TSA). MSP results showed that it can be amplified methylated bands in AGS cell line, and the methylated bands disappeared after treated with 5-Aza-Dc. MKN45 and BGC-823 cell lines were no any methylated bands amplified before and after treatment. The methylation frequency of Cav-1 gene was 29. 8% (31/104), which was significantly higher than that in adjacent tissues (P=0. 000). Furthermore, Cav-1 gene hypermethylation status was correlated with lymph node metastasis and family history of upper gastrointestinal cancers ( UGIC) , but not with pathological grade and clinical stage (P>0. 05). The positive frequency of Cav-1 expression was 51. 9%(54/104) in GC, which was significantly lower than that in adja-cent tissues (P=0. 000). The expression of Cav-1 was correlated with the frequency of gene methylation in GC tissues (P=0. 000). Conclusion The expression of Cav-1 was reduced in GC tissues and the gene hyermethylation may be one of the mechanisms causing Cav-1 gene silencing.

This study was aimed to establish quality standards of Granati pericarpium and Granati semen. The microscopy and thin layer chromatography (TLC) were used in the identification of Granati semen. According to the 2010 Chinese Pharmacopoeia, the content of moisture, total ash, acid-insoluble ash and alcohol-soluble extract were determined. And the HPLC was used in the content determination of ellagic acid in Granati semen and Granati pericarpium. The results showed that the microscopic characteristics of Granati semen were identified. And TLC identification of Granati semen was established. The content determination method of ellagic acid in Granati pericarpium and Granati semen were established. It was concluded that the established qualitative and quantitative method can be used for quality control of Granati pericarpium and Granati semen.

Objective To investigate the effect of human bone marrow mesenchymal stem cells (MSCs) on proliferation of CD8+ T lymphocytes and its mechanism. Methods MSCs were isolated and cultured then identified through many ways. The proliferative influence of MSCs on peripheral blood mononuclear cells (PBMCs) stimulated by PHA was investigated. The effect of MSCs on proliferation of CD8 + T lymphocytes induced by PHA was explored by flow cytometry. The possible mechanism of the inhibition effect of MSCs was investigated on the proliferation of CD8+ T cells stimulated by PHA with Transwell assay. Results MSCs were successfully harvested and cultured in vitro. MSCs suppressed the proliferation of CD8+ T cells stimulated by PHA when MSCs ∶ PBMCs ≥ 1 ∶ 5, which showed a dose-dependent manner. Strong proliferative inhibition of MSCs was presented on the CD8 + T cells induced by PHA in the group of Transwell (MSCs ∶ PBMCs = 1 ∶ 1) and the influence was similar to non-Transwell group. Conclusion MSCs can affect body immunity via suppressing the proliferation of CD8+ T cells.

Objective To explore the biomechanical property on Suture-Button and conventional screw fixating the distal tibiofibular syndesmosis injury.Methods The distal tibiofibular syndesmosis injury models were made by cutting the anteroinferior tibiofibular ligaments,posteroinferior tibiofibular ligaments,interosseous tibiofibular ligaments or deltoid ligaments of 8 fresh frozen calves.These models were randomly and equally divided into the two groups.The two groups were respectively fixed by Suture-Button and conventional screw.The contact area and peak intra-articular pressure of tibiatalar joint were measured by biomechanical testing methods and the stress and strain sensing technology.Results The maximal contact area and peak intra-articular pressure of Suture-Button fixation group had no significant differences with the conventional screw group by the four kinds of ankle flexion-extension angles in the sagittal plane (t =3.52,4.49,5.93,4.75,all P ＞ 0.05),peak intra-articular pressure was also similarly improved (t =3.61,3.97,4.68,2.41,all P ＞ 0.05).But biomechanical markers of two fixation groups had an improvement trend.Conclusion Suture-Button fixing the distal tibiofibular syndesmosis injury had similar biomechanical effect to compare with traditional conventional screw,and two fixation groups both improved trend to compare with ligament-cut group.

OBJECTIVE:To study the effect of different dosage of grassleaf sweetflag rhizome on central nervous system.METHODS:The effects of different dosage of grassleaf sweetflag rhizome on the hours of sleep and hypoxia live time of mice were observed,and the effects of which on water contents of brain tissues,apoptosis,endothelin(ET),malonaldehyde(MDA),erythrocuprein(SOD),glutathione peroxidase(GSH-Px),etc.in rats with cerebral ischemia were observed as well.RESULTS:Compared with the control group,different dosage of grassleaf sweetflag rhizome could shorten the sleeping time of mice and prolong the live time of hypoxia mice;high dosage of grassleaf sweetflag rhizome could remarkably decrease the water content of brain tissue and MDA level and inhibit the apoptosis of brain tissue cells while increase the activity of SOD and GSH-Px.CONCLUSION:High dosage of grassleaf sweetflag rhizome has the strongest protective effects to central nervous system,the effects of middle and low dosage of grassleaf sweetflag rhizome are lower than that of the high dosage.