Objective To study the expression of cyclooxygenase 2 (COX-2) in neonatal rats after hypoxic-ischemic brain damage (HIBD). Methods A model of HIBD in the left brain of 7-day-old Wistar rats was established. The ischemic cortex was sampled for analysis at 2, 6, 24, and 72 h, and 7 d after the onset of hypoxic-ischemic damage. The expression and number of the positive cells of COX-2 in the cortex and hippocampus at different time points were observed by immunohistochemistry. Results Low level of COX-2 immunohistochemical expression was observed in the control group. COX-2 positive cells were upregulated in ischemic brain at 2 h and peaked between 6-24 h significantly (P

Objective To study the cell apoptosis after injecting NS398 in neonatal rat brain injured by hypoxia and ischemia.Methods The model of hypoxic-ischemic brain damage(HIBD)was established in 48 Wistar rats.Intraperitoneal injection of NS398 at dose of 5,20,40 mg/kg respectively was carried out in 36 HIBD rats 30 min before hypoxia.There were also sham operation group in which the normal saline took the place of NS398.Ischemic cortex and hippocampus were sampled for analysis at 24 h,and 7 d after the onset of hypoxic-ischemic damage.The expression and number of apoptotic cells in the cortex and hippocampus were examined with TUNEL.Results The percentage of TUNEL-positive cells in HIBD group was higher than that of sham operation group.The percentage of TUNEL-positive cells in NS398 groups significantly decreased as compared with that of HIBD group.NS398 group at dose of 20 mg/kg was of no difference with NS398 group at dose of 40 mg/kg,but significantly lower than NS398 group at dose 5 mg/kg.Conclusion NS398 can reduce the TUNEL-positive cells,and 20 mg/kg and 40 mg/kg are the more effective dosage.NS398 is of the effective capability to inhibit the brain damage in the growth period when HI happened.

AIM To investigate the inhibitory effect of pycnogenol on generation of advanced glycation end products (AGEs) in vitro. METHODS Advanced glycation end products were determined by fluorospectrophotometer in the medium of 1 mol?L -1 glucose and 5% bovine albumin incubated at 37℃, 50℃, and 70℃ for different times. The inhibitory effect of pycnogenol was confirmed by the same system incubated with or without pycnogenol at different concentrations. RESULTS The rate of generation of AGEs in vitro was related with incubation time and incubation temperature. The generation of AGEs was inhibited by pycnogenol in vitro. The inhibitory rate was 10%～80% dependent on concentration and incubation time of pycnogenol. The inhibitory effect of pycnogenol on generation of AGEs was almost the same as that of Aminoguanidine at the same concentration. CONCLUSION pycnogenol could significantly inhibit generation of AGEs in vitro.

Objective To establish cell models with different insulin sensitivity status and examine the expression of protein kinase B (PKB/Akt) in the same conditions. Methods 3T3-L1cells were cultured with different glucose concentrations (3.0, 5.5 and 50.0 mmol/L respectively).Insulin sensitivity, as presented by insulin-induced glucose transport rate in the cells, was tested by 3H-2-DG incorporation. PKB expression in cells was determined by RT-PCR. Results The insulin-induced glucose transport rate in 3T3-L1 cells was affected by different concentrations of glucose. The transport rate of 3H -2-DG in cells cultured in low glucose concentration was increased by 152% and 50% compared with high glucose concentration and control group, respectively. There was no difference in PKB mRNA expression among the three groups under the same conditions,whereas there was an obvious reduction of PKB expression in the three groups after the cells were treated with glucose and insulin. Conclusions 3T3-L1 cells cultured with different concentrations of glucose present the different insulin sensitivity status, but the difference of PKB mRNA expression has not been observed in the same condition.

Objective To investigate the impact of diabetes on coronary artery bypass grafting (CABG)in peroperative patients. Methods Clinical data of 692 CABG patients were collected retrospectively from Sep. 2006 to Jul. 2010. The CABG patients were divided into diabetic group (n = 276) and nondiabetic group (n = 416) according to with the status of diabetes or not before operation. Blood glucose was dynamicaly monitored and treated with insulin to control blood glucose in perioperativeperiod. The postoperative effect,perioperative complication and inhospital case fatality and their relationship with diabetes were analyzed using univariate analysis. Results No significant differences were found regarding the incision complications (5. 8%vs. 4. 3 % , P > 0. 05). The volume of blood transfusion was (890. 7 ± 520. 6) ml in the diabetes group, which was not significantly different from that of (825. 2 ±518. 4)mlin the non-diabetes group (P>0. 05). No significant difference was found on cardiac arrhythmia (13.0% vs. 13. 5%),renal function insufficient (5. 1% vs. 2.4%)and case fatality (2. 9% and 1. 9%) between the diabetes and non-diabetes group (Ps >0. 05). In the diabetes group and non-diabetes group, the duration of IABP (3.7 ± 1. 6) d vs (3.5 ± 1.6)d, use of ventilator (2. 6 ± 1.9)d vs. (2. 4±1.5)d were not sigfnificantly different (Ps >0.05). The length of hospital stay and cost were (22. 0 ±8. 8)d and (8. 11 ±2. 40) thousand RMB in the diabetes group, which were significantly higher than that of (20. 6 ±7. 6)d and (7. 63 ±2. 20) thousand RMB in the non-diabeties group (t =2. 22 and 2. 71 ,Ps <0.05) . Conclusion There are no significant differences in the operative case fatality and complications between patients with diabetes and without nondiabetes. However,diabetes increases hospital stay and expense.

Objective To summary the application of computer aided three-dimensional visualization technique in different kinds of mandibular detects reconstruction with vascularized free fibular flap.Methods Five patients diagnosed of recurrent mandibular ameloblastoma underwent the virtually operation by software with a thin-slice CT scan,which determined shape and position of the free flap,and preoperative resin model and modules were designed and prefabricated.Then the titanium plates were bent precisely,and the surgical reconstruction proceeded exactly as expected from the modeling process.Results All operations were achieved successfully.The extent of the lesion was coincident with the preoperative CT results,and the vascularized free fibular flaps were harvested and implanted into the defect regions accurately.The mean distance was (0.23 ±2.10) mm compared with the virtual fibula.The mean time of operation was 4.4 hours.Following up the mean 12.8 months,all patients obtained the excellent functional and cosmetic outcomes.Conclusion The procedure of operation was simplified and the time was shortened with reconstruction exactly using computer aided three-dimensional visualization technique,and the clinical therapeutic efficacy of reconstruction of mandibular defect with vascularized free fibular flaps was improved notably.

Objective: Using computer-assisted navigation technology to guide the resection and reconstruction of mandibular ameloblastoma, evaluating its treatment effect. Methods : Twelve patients were selected from the Affiliated Stomatological Hospital of Nanjing University from January 2017 to May 2022. All 12 patients accepted same surgery which included resection of mandibular ameloblastoma and reconstruction by fibula musculocutaneous flap. Among them, 6 cases were included in the navigation group; 6 cases were in the non-navigation group. Advantages and disadvantages of computer-assisted navigation technology in this operation were evaluated with these cases. Results: The 12 operations were performed by the same operator. The average time for fixing the navigation bracket and performing navigation in the navigation group was about 15 minutes. Compared with the non-navigation group, the average operation time in the navigation group was shortened by about 10 minutes. In the navigation group, the mandible resection range matched the fibula musculocutaneous flap well, and the occlusal relationship recovered well. Conclusion Using the mandibular reference frame, under the guidance of computer-assisted navigation technology, the resection and reconstruction of mandibular ameloblastoma can be performed quickly and accurately.

Objective In order to establish a basis for exploring diagnostic biomarkers of type 2 diabetes mellitus (T2DM), our research screened differentially expressed circRNAs in high glucose treated human umbilical vein endothelial cells ( HUVECs) and validated these circRNAs in both cell models and peripheral blood samples of T 2DM patients.Methods The research used HUVECs as experimental model . The control group (n=3) and high glucose group (n=3) were set up and treated under normal condition (5.5 mmol/L) and high glucose condition (30.0 mmol/L), respectively.The research utilized high-throughput sequencing technology to preliminarily screen differentially expressed circRNAs .Differentially expressed circular RNAs were validated in the endothelial cell model by PCR and real -time quantitative PCR ( q-PCR) techniques.Subsequently , in the peripheral blood samples of T 2DM patients ( n=32) and control individuals ( n=28 ), the differentially expressed circRNAs were further validated . Finally, t-Test, correlation analysis and ROC curve were used to analyze the experimental results .Results Total 1087 differentially expressed circular RNAs were screened by high-throughput sequencing;and of these , 554 were up-regulated, 533 were down-regulated.Six increased circRNAs were selected and validated in HUVEC model;and their PCR and q-PCR results matched with sequencing results .Further validation was conducted in peripheral blood samples for three most up-regulated circRNAs.This study found that the differential expression of hsa_circ_0031739 in peripheral blood samples was statistically significant ( 0.015 ±0.0025 vs.0.006 ±0.0013,P=0.0059 <0.05).The area under the ROC curve (AUC) was 0.730 and the expression level of hsa_circ_0031739 was positively correlated with blood glucose ( GLU ) and glycated hemoglobin ( GHb ) ( r=0.317, P=0.0137 <0.05;r=0.348, P=0.0064 <0.05 ) .Conclusion HUVECs were commonly utilized as cell models in the study of T 2DM, and differentially expressed circular RNA profiles existed afterhigh glucose treatment .The differential expression of hsa_circ_0031739 was significant in both high glucose treated HUVECs and peripheral blood samples of T 2DM patients, and the expression level of hsa_circ_0031739 was correlated with GLU and GHb , which has certain diagnostic significance.Therefore, hsa_circ_0031739 may become a new diagnostic biomarker for T2DM and be helpful for the comprehensive diagnosis and mechanism research of T 2DM.

To study the molecular mechanism for DNA hypomethylation of STAT3 promoter in CD4+ T cells from acute graft-versus-host disease (aGVHD) patients.
 Methods: We collected CD4+ T cells from peripheral blood of 42 patients who underwent allogeneic hematopoietic stem cell transplantation (allo-HSCT) from HLA-identical sibling donors. GADD45A expression level in CD4+ T cells was measured by real-time PCR and Western blot. The binding level between HMGB1 and GADD45A in CD4+ T cells was analyzed by co-immunoprecipitation, while the binding levels of HMGB1/GADD45A with STAT3 promoter were detected by chromatin immunoprecipitation-quantitative real-time PCR (ChIP-qPCR). After overexpression of HMGB1 and knockdown of GADD45A in normal CD4+ T cells, STAT3 expression and DNA methylation were measured by Western blot and bisulfite sequencing PCR, respectively.
 Results: GADD45A expression was significantly up-regulated in patients with aGVHD compared with that in the patients without aGVHD. More HMGB1-GADD45A complexes were found in CD4+ T cells from patients with aGVHD compared with that in patients without aGVHD. The bindings of HMGB1/GADD45A with STAT3 promoter were significantly increased, and the binding levels of HMGB1/GADD45A were negatively correlated with STAT3 promoter DNA methylation. The expression of STAT3 was significantly reduced and the DNA methylation of STAT3 promoter was significantly increased in CD4+ T cells with overexpression of HMGB1 and knockdown of GADD45A compared with CD4+ T cells only with overexpression of HMGB1.
 Conclusion: The increased expression of HMGB1/GADD45A plays an importent role in STAT3 promoter DNA hypomethylation, thereby promoting STAT3 expression in CD4+ T cells from aGVHD patients.
CD4-Positive T-Lymphocytes ; Cell Cycle Proteins ; metabolism ; DNA Demethylation ; Gene Expression Regulation ; genetics ; Graft vs Host Disease ; genetics ; HMGB1 Protein ; metabolism ; Hematopoietic Stem Cell Transplantation ; Humans ; Nuclear Proteins ; metabolism ; Promoter Regions, Genetic ; genetics ; STAT3 Transcription Factor ; genetics ; metabolism