Objective To observe the effect of interleukin-1β(IL-1β) on expression of Matrix Metalloproteinases 13 (MMP-13) in rat chondrocytes and its regulation of miR-27b. Methods Chondrocytes were extracted from 7 Wistar male rats. Expression of MMP-13 were examined by Western blot at 0 h, 24 h, 48 h after IL-1βstimulation. Differential miRNAs expression profiles were examined by miRNAs microarray. The most obviously down-regulated miRNAs were confirmed by quantitative Real-time PCR. Targeted regulation relationship between miR-27b and MMP-13 was set up by Luciferase re?porter gene experiments. Results Expression of MMP-13 in rat chondrocytes was increased at a timely dependent manner upon IL-1βstimulation(P<0.05);Microarray revealed 36 miRNAs whose expression changed, among which 6(miR-27b, miR-31, miR-26a, miR-26b, miR-23, miR-204)were especially obvious. Real-time PCR confirmed that miR-27b was the one whose expression level were most down-regulated. Transient co-transfection of miR-27b mimics with luciferase expres?sion plasmids resulted in significant repression of luciferase activity in rat chondrocytes (P < 0.05). Conclusion IL-1βstimulation result in down-regulation of miR-27b and up-regulation of MMP-13 expression. MiR-27b and MMP-13 show targeted regulation relationship.

Adolescent ; Adult ; Aged ; Antineoplastic Combined Chemotherapy Protocols ; therapeutic use ; Cytarabine ; administration & dosage ; Daunorubicin ; administration & dosage ; Female ; Humans ; Idarubicin ; administration & dosage ; Leukemia, Myeloid, Acute ; drug therapy ; Male ; Middle Aged ; Treatment Outcome ; Young Adult

[Objective]To compare two preparing procedures for larger chemically acellular nerve allografts (CANA). [Methods]The sciatic nerves of pigs were exposed by a muscle-splitting incision and were isolated free of the underlying fascia. The 60-mm-long segments of the nerve were obtained. They were treated according to the following decellularization processes.In group I,the nerve segments were treated with 7% Triton-100 solution and 7% sodium deoxycholate for two times.In group II,another protocol was created with the detergents Triton X-200,sulfobetaine-16,and sulfobetaine-10 for two times. The degrees of decellularization,activity of laminin,degrees of demyelination,and integrity of the nerve fiber tube were observed under microscope and were assessed by a scoring system.[Results]In both experimental groups the activity of laminin was present and the degrees of decellularization were complete. As for the demyelization of the nerve segments,the myelin sheath in Group II was partially preserved,but it completely disappeared in Group Ⅰ. The structure of the nerve fiber tube in Groups Ⅰ and Ⅱ were not as integral as that in the normal group.[Conclusion]It may be a better method for the larger CANA,to be treated with TritonX-100 and sodium deoxycholate during the decellularization procedure.

Head and Neck Neoplasms ; surgery ; Humans ; Neck ; surgery ; Neck Dissection ; methods ; Thyroid Diseases ; surgery ; Vascular Surgical Procedures ; methods

Administration, Oral ; Anti-Inflammatory Agents, Non-Steroidal ; adverse effects ; therapeutic use ; Aspirin ; adverse effects ; therapeutic use ; Brain Edema ; chemically induced ; Child ; Coma ; chemically induced ; Female ; Humans ; Liver ; drug effects ; pathology ; physiopathology ; Reye Syndrome ; chemically induced ; Treatment Outcome

China ; Curriculum ; Education, Dental ; Oral Medicine ; education

Since the publication of a high-throughput DNA sequencing technology based on PCR reaction was carried out in oil emulsions in 2005, high-throughput DNA sequencing platforms have been evolved to a robust technology in sequencing genomes and diverse DNA libraries. Antibody libraries with vast numbers of members currently serve as a foundation of discovering novel antibody drugs, and high-throughput DNA sequencing technology makes it possible to rapidly identify functional antibody variants with desired properties. Herein we present a review of current applications of high-throughput DNA sequencing technology in the analysis of antibody library diversity, sequencing of CDR3 regions, identification of potent antibodies based on sequence frequency, discovery of functional genes, and combination with various display technologies, so as to provide an alternative approach of discovery and development of antibody drugs.

Objective To detect the relationship between CAG repeat in IT15 gene and clinical manifestations of Huntington's disease (HD).Methods Non-denaturing polyacrylamide gel electro- phoresis method was used to detect CAG repeat.Clinical manifestations were scored by UHDRS and MMSE. Results Genotypes of IT15 were heterozygous in all 29 HD patients.CAG repeat in the HD chromosome, being 42—62,13—28 in normal chromosome,was inversely correlated with age of onset (r=-0.539,P

Objective To investigate the differences of the plasma homocysteine (Hcy) between the patients with acute cerebral infarction and the normal controls, and the relationship between the levels of plasma Hcy and folic acid, vitamin B_(12) and lipids, and the relationship between clinical symptoms in patients with acute cerebral infarction. Methods A total of 91 patients with first-ever acute cerebral infarction and 100 controls without cerebrovascular accident were included. Their ratio factors such as age, sex, hypertension and diabetes did not have significant differences. Enzymatic cycling was used to detect plasma Hcy levels. Chemiluminescence was use to detect folic acid and vitamin B_(12) levels. Biochemical analyzer was used to measure lipid levels. The patients with acute cerebral infarction were evaluated by the National Institutes of Health Stroke Scale (NIHSS). Results The plasma Hcy level was significant higher in the acute cerebral infarction group than that in the control group (21.22 ±7.29 μmol/L vs. 13.19 ± 2.13 μmol/L) (P ＜ 0.05); the plasma Hcy level in the acute cerebral infarction group was significantly negatively correlated with folic acid (r = - 0.307,P ＜0.05) and vitamin B_(12) (r = - 0.270, P ＜0.05). It was significantly positively correlated with low-density lipoprotein (r =0.282, P ＜0.05), and it was significantly negatively correlated with high-density lipoprotein (r = -0.219, P ＜0.05). The mean value of the plasma Hcy in acute cerebral infarction group increased with the increase of NIHSS scores. Conclusions Hyperhomocysteinemia is an independent risk factor for acute cerebral infarction. The levels of folic acid and vitamin B_(12) decreased with the increase of Hcy levels. The higher the Hcy levels,the more serious the clinical symptoms are. Hcy may increase the risk of ischemic cerebrovascular disease by influencing the lipid metabolism.

Objective To examine the effect of donepezil on cognitive function of Alzheimer's disease from a naturalistic observation in memory clinic.Methods From the subject pool in memory clinic,thirteen patients with mild to moderate Alzheimer's disease(meeting NINCDS-ADRDA criteria of probable AD)were enrolled in the naturalistic observation.Donepezil with dosage of 5 mg daily Was administered.Cognitive Ability Screening Instrument (CASI)Was used to assess the cognitive function,and was administered at baseline,3 and 6 months after treatment with donepezil.Resuits After 6-month treatment with donepezil,the change of score of verbal fluency from baseline Was significant[(4.3±3.1)vs(6.2±2.7),P＜0.05].There was a trend that constructional praxis was also improved after 6-month treatment(P=0.06).The change of scores of other cognitive domains remained the sanle(P＞0.05).Conclusion In the naturalistic observation at memory chnic,donepezil may improve verbal fluency of AD patients,and keep most cognitive function stable.