At present, the research regarding repair of spinal cord mainly focuses on tissue engineering. Neural tissue engineering materials provide three-dimensional template for tissue regeneration and also environment for synthesis of extracellular matrix. This paper summarizes the types of nerve transplant materials and the research progress in application for treatment of spinal cord injury, so as to provide theoretical evidence for repair of spinal cord injury. But some problems exist in application of nerve cell scaffold materials for repair of spinal cord injury: poor mechanical properties lead to slow degradation speed, causing difficulties in tissue reconstruction with respect to velocity and in subsequent reconstruction of porous three-dimensional scaffold. In recent years, novel biomaterials with specific repair function have been made by the engineering method through combining the biological molecule with specific signal identification function and available materials, which is an advanced projeot in the current field of biomaterials.

AlM: To explore the expression and significance of cysteine- rich 61 ( CCN1/Cyr61 ) in oxygen - induced retinal neovascularization ( RNV) of mice and study the inhibition effect of CCN1 specific siRNA on RNV.
METHODS:Two hundred healthy C57BL/6J mice were chosen and randomly divided into control group, hyperxia group, hyperxia control group and CCN1 treated group, with 50 mice in each group. The hyperxia control group was treated with vector plasmids by intravitreal injection. The CCN1 treated group received CCN1 siRNA recombinant plasmids by intravitreal injection. Adenosine diphosphate-ase ( ADPase) stained retina flat-mounts was performed to assess the retinal vascular profiles, HE staining was applied to count the number of vascular endothelial cell nuclei breaking through the internal limiting membrane, protein and mRNA level expression of CCN1 were measured by immunohistochemistry, Western blot and RT-PCR.
RESULTS: There were large nonperfusion area and a large number of vascular endothelial cell nuclei breaking through the internal limiting membrane ( 25. 25 ± 1. 26;23. 12 ± 1. 16 ) in the hyperxia group and the hyperxia control group. Regions of nonperfusion and vascular endothelial cell nuclei (8. 47±1. 15) were decreased in the CCN1 treated group compared to the hyperxia group and the hyperxia control group. Compared with the control group, there were high protein and mRNA expression of CCN1 in the hyperxia group and the hyperxia control group. The expression of CCN1 protein and mRNA were decreased in the CCN1 treated group compared with the hyperxia group and hyperxia control group (all P<0. 05).
CONCLUSlON: The abnormal expression of CCN1 has close relation with RNV. The development of RNV can be markedly inhibited by RNA interference targeting CCN1, which, we believe, will provide new molecular targets and a rationale for clinical developing new strategy for ROP therapy.

Objective To find a proper way for accurate results on completing blood counts.Methods Based on the results from automatic hematology analyzer XE-2100,set up the criteria for blood cell microscopic examination.1368 blood specimen were detected and the results were analyzed according to the criteria.Statistics on the data were made to evaluate the accordance between warnings of analyzer and manual examination,likewise the reliability of the criteria.Results Comparing with microscopic examination,analyzer warning on low PLT has good accordance,Kappa value was 0.95,U value was 35.19,P

AIM:To investigate how to design personalized cataract surgery programs to achieve surgical correction of preoperative corneal astigmatism with surgical astigmatism under the guidance of corneal topography, improve postoperative visual quality and reduce the cost of treatment.
METHODS: Totally 202 cases ( 226 eyes ) cataract patients were divided into randomized treatment group and individualized treatment group. According to the method and location of the incision, randomized treatment group were divided into 8 groups. Surgical astigmatism after different incision were calculated with the use of preoperative and postoperative corneal astigmatism through vector analysis method. Individualized treatment groups were designed personably for surgical method with reference of every surgically induced astigmatism, the surgical method chooses the type of surgical incision based on close link between preoperative corneal astigmatism and surgically induced astigmatism, and the incision was located in the steep meridian. The postoperative corneal astigmatism of individualized treatment group was observed.
RESULTS: Postoperative corneal astigmatism of individualized treatment group were lower than that of 3.0mm clear corneal tunnel incision in the randomized treatment group, there were statistically significance difference, while with 3. 0mm sclera tunnel incision group there were no statistically significance difference. After 55. 8% of patients with the use of individualized surgical plan could undergo the operation of extracapsular cataract extraction with relatively low cost and rigid intraocular lens implantation, the per capita cost of treatment could be reduced.
CONCLUSION: Personalized cataract surgery programs are designed to achieve surgical correction of preoperative corneal astigmatism under the use of corneal topography, improve postoperative visual quality and reduce the cost of treatment.

Objective To develop a new method for simultaneous quantifying and genotyping of HBV in a single reaction based on dual molecular beacon real-time PCR.Methods Genotype B and C recombinant plasmids were constructed as the standards and genotype-specific primers and molecular beacons were designed for each genotype.The molecular beacons of genotype B and C were labeled with FAM and Hex respectively.In this way,a simultaneous qualification and genotyping method for HBV DNA in a single real-time PCR reaction system was developed.Firstly,10-fold gradient dilution of genotype B and C standard plasmids (103-1011 kIU/L) were utilized to evaluate the linear ranges and sensitivity of this approach.The clinical specificity was tested with twenty different serum specimens (5 cases with hepatitis C virus,5 cases with herpes simplex virus and 5 cases with human papilloma virus as well as 5 healthy volunteers) ; the reproducibility was assessed by intra-assay and inter-assay coefficient of variation (CV) of cycle threshold (Ct) value through 10 repeated detections within a batch and between batches of the B,C standard plasmids (108,106 and 104 kIU/L).Then the accuracy of qualifying and genotyping of the self-built method was evaluated by a parallel examination with 132 HBV infected patients by use of two commercial kits as the references.Finally,these HBV-positive patients were divided into 4 groups:asymptomatic carrier (n =21),chronic hepatitis (n =77),liver cirrhosis (n =25) and hepatocellular carcinoma (n =9) to investigate the relationship of genotypes,stages of disease progression and HBV DNA load.Results A simultaneous qualification and genotyping assay was successfully built and its genotyping sensitivity was 103 kIU/L and the linear range was 103-1011 kIU/L.The intra-assay CV of B genotyping was 1.51％ to 1.80％ and the interassay CV was 2.11％ to 3.03％,while the intra-assay CV of C genotyping was 1.79％ to 1.95％ and the inter-assay CV was 2.53％ to 2.91％.The results of non HBV infected cases and healthy volunteers showed negative.In the test of 132 HBV infected patients,the general coincident rate of genotyping results comparing our assay and HBV DNA genotyping kit was 90.9％ (120/132,Kappa =0.832,P ＜ 0.05).The HBV DNA quatitive results between the assay[5.07 (3.89-6.33)] and HBV DNA quatitive kit [5.19 (4.15-6.32) lg kIU/L] were well correlative (R2 =0.8477,P ＜ 0.05).69 genotype B cases,51 genotype C cases and 12 B/C mixed-genotype cases were detected by dual molecular beacon real-time PCR method and their HBV DNA load were 4.54 (3.83-6.17),5.53 (4.02-6.55),4.58 (3.68-4.98) lg kIU/L respectively.Where the patients with genotype C had higher DNA load than the patients with other two genotypes (Z =-2.195and-2.162,P ＜ 0.05).The HBV DNA load of asymptomatic group,chronic hepatitis group,liver cirrhosis group and hepatocellular carcinoma group were 7.02 (6.35-7.84),4.94 (4.16-6.25),4.37(3.50-5.17) and 3.45 (3.25-4.92) lg kIU/L,respectively.Among them,the asymptomatic group was significantly higher than those of other three groups (Z =-4.244,-4.568 and-3.489,P ＜0.001) and DNA load comparing with the chronic hepatitis group,liver cirrhosis group and hepatocellular carcinoma group also showed statistically different (Z =-2.894 and-2.413,P ＜ 0.05).However,compared with the liver cirrhosis group and hepatocellular carcinoma group there was no significant difference (Z =-0.995,P =0.335).Conclusion A dual molecular beacon real-time PCR assay which can simultaneously quantifying and genotyping HBV DNA with highly accuracy,sensitive and specificity is successfully developed.(Chin J Lab Med,2013,36:333-338)

Humans ; Laryngeal Neoplasms ; pathology ; Male ; Middle Aged ; Neurilemmoma ; pathology

The association of non-HDL-cholesterol and non-HDL-C-to-HDL-cholesterol ratio (non-HDL-C-to-HDL-C ratio) with early diabetic nephropathy in patients with type 2 diabetes mellitus was investigated.Non-HDL-C and non-HDL-C-to-HDL-C ratio were positively related with microalbuminuria (P＜0.05 or P＜0.01).Non-HDL-C-to-HDL-C ratio is an independent risk factor of early diabetic nephropathy in patients with type 2 diabetes mellitus.

Objective To evaluate the application value of X-ray,echocardiogram,pulmonary perfusion scintigraphy,EBCT,Magnetic resonance Pulmonary angiography in diagnosis of PTE.Methods Twenty-five consecutive patients clinically diagnosed of having PTE were examined from july 2003 through March 2004. Patients underwent X-ray chest plain film, echoeardiogram, electronic beam computed tomographie (EBCT)angiography,ventilation-perfusion (V-P)seintigraphy,Magnetic resonance Pulmonary angiography (MRPA)and puhnonary angiography according to a strict diagnostic protocol.Two of the independent readers reviewed the pulmonary angiography and record all of the lobe and segmental involved in PTE and compared with other image method.Results Pulmonary angiography:all of the patients success underwent the technique,the pulmonary artery branch with PTE was in 556 of 775 branches (71.7%). Chest radiography had hints of diagnosis in 12 of 25 patients.Nine patients diagnosed with echocardiogram. Right heart enlargement was in 21,and pulmonary hypertension in 18.V-P scintigraphy revealed 247 segmental involved with PTE of 500 (52.0% ),and the sensitivity was 64.66% compare with the pulmonary angiography.There were 523 pulmonary branches involved PTE with EBCT pulmonary angiograpy of 775 branches,and the sensitivity was 94.06%.MRPA: 8 of 10 patients succeed in the technique, 155 branches of 248 were detected with PTE(62.5% ),the sensitivity was 81.29%.Conclusions EBCT is a high sensitivity method in diagnosis of PTE.Chest radiography and echocardiogram are the first-line modality of PTE.V-P scintigrapby is the valid compensation in diagnosis subsegmental pulmonary artery with PTE when EBCT miss diagnosis.Gd-CE-MRPA may be the second-line modality in diagnosis of PTE.

Antigens, Bacterial ; genetics ; metabolism ; Bacterial Proteins ; genetics ; metabolism ; Child ; Child, Preschool ; DNA, Bacterial ; genetics ; Gastritis ; pathology ; Gene Expression Regulation, Bacterial ; Helicobacter Infections ; microbiology ; pathology ; Helicobacter pylori ; genetics ; Humans ; Immunohistochemistry ; Peptic Ulcer ; microbiology ; pathology ; Polymerase Chain Reaction

Objective To compare the effect of pericardial devascularization with that of the modified Sugiura procedure in management of portal hypertension. Methods From 1990 to 2008, 236patients with portal hypertension underwent operations including pericardial devascularization in 147and modified Sugiura in 89 in our hospital. Results There were 12 perioperative deaths (8.2 % ), and 2 rebleedings (2 % ) in the pericardial devascularization group, and 7 perioperative deaths (7.9 % ) and 2 rebleedings(3.4 % ) in the modified Sugiura group. The follow-up rate was 91.9 % in the pericardial devascularization group and 87.8% in the modified Sugiura group respectively, in a period from 6 months to 19 years. The 1-, 3-and 5-year rebleeding rates were 5.7%,15.2% and 25.5% in the pericardial devascularization group and 6.9%, 16.3%, 29.5 % in the modified Sugiura group, respectively. The 1-, 3- and 5-year survival rates were 87.8% ,79.1% and 69.7% in the pericardial devascularization group and 95.8 %,85.0%, 76.9 % in the modified Sugiura group, respectively. Conclusion Modified Sugiura procedure and pericardial devascularization have differences in perioperative mortality as well as rebleeding and survival rates.