Jian Rong

Sun Yat-Sen University, Shengcheng, Guangdong, China

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Publications (18)37.55 Total impact

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    ABSTRACT: Plenty of studies have established that dysregulation of autophagy plays an essential role in cancer progression. The autophagy-related proteins have been reported to be closely associated with human cancer patients' prognosis. We explored the expression dynamics and prognostic value of autophagy-related protein ULK1 by immunochemistry (IHC) method in two independent cohorts of nasopharygeal carcinoma (NPC) cases. The X-tile program was applied to determine the optimal cut-off value in the training cohort. This derived cutoff value was then subjected to analysis the association of ULK1 expression with patients' clinical characteristics and survival outcome in the validation cohort and overall cases. High ULK1 expression was closely associated with aggressive clinical feature of NPC patients. Furthermore, high expression of ULK1 was observed more frequently in therapeutic resistant group than that in therapeutic effective group. Our univariate and multivariate analysis also showed that higher ULK1 expression predicted inferior disease-specific survival (DSS) (P<0.05). Consequently, a new clinicopathologic prognostic model with 3 poor prognostic factors (ie, ULK1 expression, overall clinical stage and therapeutic response) could significantly stratify risk (low, intermediate and high) for DSS in NPC patients (P<0.001). These findings provide evidence that, the examination of ULK1 expression by IHC method, could serve as an effective additional tool for predicting therapeutic response and patients' survival outcome in NPC patients.
    PLoS ONE 01/2015; 10(2):e0117375. DOI:10.1371/journal.pone.0117375 · 3.53 Impact Factor
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    ABSTRACT: Objectives: The alteration of the Toll-like receptor/nuclear factor-kappa B (TLR4/NF-κB) signaling pathway during deep hypothermia circulatory arrest (DHCA) has not yet been defined. The aim of this study was to explore the expression of the TLR4/NF-κB pathway cytokine in cerebral injury resulting from DHCA as well as the effect of selective antegrade cerebral perfusion (SACP) on TLR4/NF-κB pathway expression. Methods: Twelve pigs were randomly assigned to DHCA alone (n = 6) or DHCA with SACP (n = 6) at 18°C for 80 min. Serum interleukin (IL)-6 was assayed by ELISA. Apoptosis and NF-κB proteins were detected by fluorescence TUNEL and Western blot, respectively. The level of TLR4 mRNA and protein were determined through qRT-PCR and Western blot. Results: The serum IL-6 level of the SACP group was significantly lower than that of the DHCA group at the end of circulation arrest and experimentation. Apoptotic index and NF-κB protein were apparently lower in SACP animals (p < 0.05). Compared to the DHCA group, the levels of TLR4 protein and mRNA in the SACP group were lower with significance (p < 0.05). Conclusions: The TLR4/NF-κB signaling pathway plays a critical role in the pathogenesis of DHCA cerebral injury. Attenuation of the TLR4/NF-κB inflammatory cytokines probably contributes to the neuroprotective effect of SACP. The TLR4/NF-κB inflammatory signaling pathway may be a novel therapeutic target for developing a new strategy for neuroprotection in DHCA. © 2014 S. Karger AG, Basel.
    Cardiology 05/2014; 128(3):243-250. DOI:10.1159/000360694 · 2.04 Impact Factor
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    ABSTRACT: Skewed CD8+ T cell responses are important in airway inflammation. This study investigates the role of the airway epithelial cell-derived insulin-like growth factor 1 (IGF1) in contributing to CD8+ T cell polarization. Expression of IGF1 in the airway epithelial cell line, RPMI2650 cells, was assessed by quantitative real time RT-PCR and Western blotting. The role of IGF1 in regulating CD8+ T cell activation was observed by coculture of mite allergen-primed RPMI2650 cells and naïve CD8+ T cells. CD8+ T cell polarization was assessed by the carboxyfluorescein succinimidyl ester-dilution assay and the determination of cytotoxic cytokine levels in the culture medium. Exposure to mite allergen, Der p1, increased the expression of IGF1 by RPMI2650 cells. The epithelial cell-derived IGF1 prevented the activation-induced cell death by inducing the p53 gene hypermethylation. Mite allergen-primed RPMI2650 cells induced an antigen-specific CD8+ T cell polarization. We conclude that mite allergens induce airway epithelial cell line, RPMI2650 cells, to produce IGF1; the latter contributes to antigen-specific CD8+ T cell polarization.
    Cell Biology International 05/2014; DOI:10.1002/cbin.10313 · 1.64 Impact Factor
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    ABSTRACT: The atrial fibrillation (AF) associated microRNAs (miRNAs) were found in the right atrium (RA) and left atrium (LA) from patients with rheumatic mitral valve disease (RMVD). However, most studies only focus on the RA; and the potential differences of AF-associated miRNAs between the RA and LA are still unknown. The aim of this study was to perform miRNA expression profiles analysis to compare the potential differences of AF-associated miRNAs in the right atrial appendages (RAA) and left atrial appendages (LAA) from RMVD patients. Samples tissues from the RAA and LAA were obtained from 18 RMVD patients (10 with AF) during mitral valve replacement surgery. From these tissues, miRNA expression profiles were created and analyzed using a human miRNA microarray. Then, the results were validated using qRT-PCR analysis for 12 selected miRNAs. Finally, potential targets of ten validated miRNAs were predicted and their functions and potential pathways were analyzed using the miRFocus database. In RAA, 65 AF-associated miRNAs were found and significantly dysregulated (i.e. 28 miRNAs were up-regulated and 37 were down-regulated). In LAA, 42 AF-associated miRNAs were found and significantly dysregulated (i.e. 22 miRNAs were up-regulated and 20 were down-regulated). Among these AF-associated miRNAs, 23 of them were found in both RAA and LAA, 45 of them were found only in RAA, and 19 of them were found only in LAA. Finally, ten AF-associated miRNAs validated by qRT-PCR were similarly distributed in RAA and LAA; three were found in both RAA and LAA, five were found only in RAA, and two were found only in LAA. Potential miRNA targets and molecular pathways were identified. We have found the different distributions of AF-associated miRNAs in the RAA and LAA from RMVD patients. This may reflect different miRNA mechanisms in AF between the RA and LA. These findings may provide new insights into the underlying mechanisms of AF in RMVD patients.
    Journal of Translational Medicine 04/2014; 12(1):90. DOI:10.1186/1479-5876-12-90 · 3.99 Impact Factor
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    ABSTRACT: This study aimed to investigate whether selective antegrade cerebral perfusion or retrograde cerebral perfusion is a better technique for brain protection in deep hypothermic circulatory arrest by obtaining metabolic evidence from microdialysis. Randomized, animal study. Assisted circulation laboratory. Eighteen piglets of either sex (9.8 ± 3.1 kg). Animals were randomly assigned to 40 minutes of circulatory arrest at 18°C without cerebral perfusion (deep hypothermic circulatory arrest group, n = 6) or with selective antegrade cerebral perfusion (selective antegrade cerebral perfusion group, n = 6) or retrograde cerebral perfusion (retrograde cerebral perfusion group, n = 6). Reperfusion was continued for 3 hours. Microdialysis (glucose, lactate, pyruvate, and glycerol) variables in the cortex dialysate were measured every 30 minutes. Intracerebral pressure and serum S-100 levels were also monitored. After 3 hours of reperfusion, cortical tissue was harvested for terminal deoxynucleotidyl transferase dUTP nick-end labeling staining. After 40 minutes of circulatory arrest, the deep hypothermic circulatory arrest group presented marked elevations of intracerebral pressure, and serum S-100 levels were higher in the deep hypothermic circulatory arrest group than in the other two groups (p < 0.001, respectively). The selective antegrade cerebral perfusion group exhibited higher glucose, lower lactate, and lower glycerol levels and a lower lactate-to-pyruvate ratio in comparison to the deep hypothermic circulatory arrest group (p < 0.05, respectively); the retrograde cerebral perfusion group had lower lactate and glycerol levels and a lower lactate-to-pyruvate ratio (p < 0.05, respectively) but similar glucose levels compared to deep hypothermic circulatory arrest alone. Furthermore, selective antegrade cerebral perfusion provided better preservation of energy and cell integrity than retrograde cerebral perfusion with higher glucose and lower glycerol levels (p < 0.05, respectively). After 3 hours of reperfusion, fewer apoptotic neurons were found in selective antegrade cerebral perfusion animals than in the other two groups (p < 0.05, respectively). Both selective antegrade cerebral perfusion and retrograde cerebral perfusion were superior to deep hypothermic circulatory arrest alone during circulatory arrest. Retrograde cerebral perfusion was a moderate technique that had similar advantages with regard to less cerebral edema, better clearance of metabolic waste, and lower levels of biomarkers of injury than selective antegrade cerebral perfusion, but its capacity for energy preservation, maintenance of cellular integrity, and protection against apoptosis was lower than that of selective antegrade cerebral perfusion.
    Critical care medicine 02/2014; 42(5). DOI:10.1097/CCM.0000000000000220 · 6.15 Impact Factor
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    ABSTRACT: Intracellular calcium overload is a key factor for myocardial ischemia reperfusion injury (IR). However, there was no report for interstitial calcium concentration dynamics. We investigated the interstitial calcium dynamics in rat myocardial IR model in vivo. A microdialysis system was involved, and the time delay of the system and recovery time was introduced and tested with a fluids switching method. Twelve SD rats were divided into IR or control group. Myocardial IR was induced by ligating (20 min) then releasing (60 min) the suture underlying left anterior descending branch. Mycrodialyisis probe was implanted into the left ventricular myocardium perfusion area for occlusion. Dialysate samples were collected every 10 min. Dialysate calcium concentration was detected with an atomic absorption spectrophotometer. Recovery time for the microdialysis system was 20 min, and recovery rate was 16%. Dialysate calcium concentration showed no changes during ischemia, descended immediately after reperfusion, reached the lowest level (67% of baseline value) 20 min after reperfusion, then escalated slowly. Recovery time was an important parameter for mycrodialysis technique, and it should not be neglected and needed to be tested. Our data suggest that interstitial calcium concentration in rats with myocardial IR in vivo kept steady in ischemia, descended rapidly at the initial reperfusion, then rebounded slowly. In conclusion, we introduced the concept of recovery time for microdialysis and provided a simple testing method.
    Journal of Huazhong University of Science and Technology 02/2014; 34(1):37-41. DOI:10.1007/s11596-014-1229-9 · 0.78 Impact Factor
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    ABSTRACT: Structural changes of the left and right atria associated with atrial fibrillation (AF) in mitral stenosis (MS) patients are well known, and alterations in microRNA (miRNA) expression profiles of the right atria have also been investigated. However, miRNA changes in the left atria still require delineation. This study evaluated alterations in miRNA expression profiles of left atrial tissues from MS patients with AF relative to those with normal sinus rhythm (NSR). Sample tissues from left atrial appendages were obtained from 12 MS patients (6 with AF) during mitral valve replacement surgery. From these tissues, miRNA expression profiles were created and analyzed using a human miRNA microarray. Results were validated via reverse-transcription and quantitative PCR for 5 selected miRNAs. Potential miRNA targets were predicted and their functions and potential pathways analyzed via the miRFocus database. The expression levels of 22 miRNAs differed between the MS patients with AF and those with NSR. Relative to NSR patients, in those with AF the expression levels of 45% (10/22) of the differentiated miRNAs were significantly higher, while those of the balance (55%, 12/22) were significantly lower. Potential miRNA targets and molecular pathways were identified. AF alters the miRNA expression profiles of the left atria of MS patients. These findings may be useful for the biological understanding of AF in MS patients.
    BMC Cardiovascular Disorders 01/2014; 14(1):10. DOI:10.1186/1471-2261-14-10 · 1.50 Impact Factor
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    ABSTRACT: The therapeutics of lung cancer (LC) is unsatisfactory. The pathogenesis of LC remains unclear. Protease-activated receptors (PAR) are involved in the immunoregulation. The present study aims to investigate the activation of PAR2 in regulation of the expression of EGFR and apoptosis of LC cells. The results showed that exposure to tryptase increased EGFR expression in A549 cells and suppressed the cell apoptosis. Tryptase also decreased the expression of Bax and increased Bcl-xL levels in A549 cells. We conclude that activation of PAR2 by tryptase can decrease the ratio of Bax/Bcl-xL and reduce the LC cell line, A549 cells, and apoptosis.
    Cancer Investigation 10/2013; DOI:10.3109/07357907.2013.845674 · 2.24 Impact Factor
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    ABSTRACT: MicroRNAs were enrolled in various cardiovascular disease especially ischemic heart diseases, but the microRNA changes during myocardial ischemia reperfusion injury underwent cardiopulmonary bypass are still unknown. This study screens the microRNA differences in CPB canines and evaluates the relationship of microRNAs with myocardial ischemia reperfusion injury. 13 healthy canines received CPB with 60 minutes of aortic clamping and cardioplegic arrest, followed by 90 minutes reperfusion. Left ventricular myocardial samples, blood samples and hemodynamic data were taken at different time points. We performed microRNAs microarray experiments upon the left ventricle myocardium tissue of canines before CPB and after reperfusion for 90 minutes by pooling 3 tissue samples together and used qRT-PCR for confirmation. Statistically significant difference was found in mir-499 level before CPB and after reperfusion (T1 vs. T4, p = 0.041). We further examined the mir-499 levels by using qRT-PCR in all 13 canines at 4 different time points (T1 vs. T4, p = 0.029). Mir-499 expression was negatively correlated with cardiac troponin T (cTnT) and creatine kinase- MB (CK-MB) levels of canines in all time points samples (r = 0.469, p < 0.001 and r = 0.273, p = 0.050 respectively). Moreover, higher mir-499 expression level was associated with higher dP/dtmax at 25 minutes and 90 minutes after reperfusion. Myocardial ischemic reperfusion injury with cardiopulmonary bypass results in declining level of mir-499 expression in left ventricle myocardium of canines, suggesting mir-499 would be a potential therapeutic target in cardiac protection during open heart surgery.
    Journal of Translational Medicine 06/2013; 11(1):154. DOI:10.1186/1479-5876-11-154 · 3.99 Impact Factor
    This article is viewable in ResearchGate's enriched format
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    ABSTRACT: BACKGROUND: We performed a meta-analysis to compare the accuracy of (18)FDG PET-CT and bone scintigraphy for the detection of bone metastases in breast cancer patients. METHODS: Studies about (18)FDG PET-CT and bone scintigraphy for the detection of bone metastases in breast cancer patients were systematically searched in the MEDLINE and EMBASE databases. We calculated sensitivities, specificities, diagnostic odds ratios, and likelihood ratios, and constructed summary receiver operating characteristic curves using bivariate regression models for (18)FDG PET-CT and bone scintigraphy, respectively. RESULTS: Across 7 studies (668 patients), sensitivity and specificity of PET-CT 0.93 (95% confidence interval [CI] = 0.82-0.98) and 0.99 (95% CI = 0.95-1.00), and of bone scintigraphy were 0.81 (95% CI = 0.58-0.93) and 0.96 (95%CI = 0.76-1.00), respectively. Area under curves for PET-CT and bone scintigraphy was 0.98 (95% CI = 0.98-1.00) and 0.94 (95% CI = 0.92-0.96), respectively. CONCLUSIONS: Compared with bone scintigraphy, (18)FDG PET-CT may higher sensitivity and accuracy for detection of bone metastases in breast cancer patients.
    Surgical Oncology 06/2013; 22(2):86-91. DOI:10.1016/j.suronc.2013.01.002 · 2.37 Impact Factor
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    ABSTRACT: Controlled oxygen reperfusion could protect the lung against ischemia-reperfusion injury in cardiopulmonary bypass (CPB) by downregulating high mobility group box 1 (HMGB1), a high affinity receptor of HMGB1. This study investigated the effect of controlled oxygen reperfusion on receptor for advanced glycation end products (RAGE) expression and its downstream effects on lung ischemia-reperfusion injury. Fourteen canines received CPB with 60 minutes of aortic clamping and cardioplegic arrest followed by 90 minutes of reperfusion. Animals were randomized to receive 80% FiO2 during the entire procedure (control group) or to a test group receiving a controlled oxygen reperfusion protocol. Pathologic changes in lung tissues, RAGE expression, serum interleukin-6 (IL-6), and tumor necrosis factor-α (TNF-α) were evaluated. The lung pathologic scores after 25 and 90 minutes of reperfusion were significantly lower in the test group compared with the control group (p < 0.001). RAGE expression, TNF-α, and IL-6 were downregulated by controlled oxygen treatment (p < 0.001). RAGE might be involved in the lung ischemia-reperfusion injury in canine model of CPB, which was downregulated by controlled oxygen reperfusion.
    ASAIO journal (American Society for Artificial Internal Organs: 1992) 05/2013; 59(3):302-8. DOI:10.1097/MAT.0b013e318290504e · 1.39 Impact Factor
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    ABSTRACT: The epidermal growth factor receptor (EGFR) has a close relation to lung cancer; its role in the pathogenesis of lung cancer is to be further elucidated. The results of this study indicate that about 80% exosomes purified from the LC biopsies contained EGFR; only about 2% exosomes contained EGFR in the samples from chronic lung inflammation. The purified exosomes induced tolerogenic DCs. Coculture of the tolerogenic DCs and Th0 cells generated the tumor antigen-specific regulatory T cells (Treg). The Tregs could suppress the tumor antigen specific CD8(+) T cells.
    Cancer Investigation 04/2013; DOI:10.3109/07357907.2013.789905 · 2.24 Impact Factor
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    ABSTRACT: Microdialysis is a specific and local sampling method to collect free molecules from the extracellular fluid, however, there are no reports on time delay issues of microdialysis applications. This study was to check the time gap between the start of target molecule changes in detected fluid and corresponding stable concentration formation in the sampled dialysate. A designated microdialysis system for free calcium ion was set up in vitro and perfused with saline. The dialysate was diluted synchronously, and collected in a vial every 10 min. The free calcium concentration [Ca++] of the sample was measured by an atomic absorption spectrophotometer. A signal-switching method was introduced to mimic the target molecule [Ca++] changes in the detected fluid, standard calcium solution and saline. There was a notable lag in dialysates [Ca++] for both uprising and down going course in spite of instant switching between the detected fluids. The recovery time (RT) of the microdialysis system was extrapolated to be 20 min for [Ca++] detection. With 10 min sampling interval, [Ca++] time delay of the microdialysis system existed, and could not be estimated precisely beforehand. The signal-switching method was applicable for RT calibration in vitro with a dedicated microdialysis system.
    02/2013; 5(2):149-52. DOI:10.4103/1947-2714.107540
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    ABSTRACT: Aim: To investigate whether XRCC1 and ADPRT polymorphisms might be associated with outcomes of breast cancer. Methods: A prospective study was conducted with a total of 335 breast cancer patients undergoing chemotherapy consecutively collected from Jan. 2005 to Jan. 2008. Genotyping of XRCC1 and ADPRT polymorphisms was conducted by PCR-RFLP assay. Results: All 335 patients were followed up until death or the end of Jan. 2012, with a median follow-up period of 38.8 (2-64) months. It was shown that the variant genotype of XRCC1 399Gln/Gln was strongly significantly associated with a decreased risk of death from breast cancer, with an HR (95% CI) of 0.52 (0.28-0.91). Similarly, individuals carrying the ADPRT 762Ala/Ala demonstrated longer survival compared to ADPRT 762 Val/ Val, with an HR (95% CI) of 0.58 (0.31-0.97). Individuals with combination genotypes of XRCC1 399Gln allele and ADPRT 762Ala/Ala presented with a longer survival, the HR (95% CI) being 0.56 (0.32-0.97). Conclusion: We found a significant association between XRCC1399Gln/ Gln and ADPRT 762Ala/Ala polymorphisms and clinical outcomes. These two genotypes could be used as a surrogate markers of clinical outcome in glioma cases receiving chemotherapy.
    Asian Pacific journal of cancer prevention: APJCP 10/2012; 13(10):4923-6. DOI:10.7314/APJCP.2012.13.10.4923 · 1.50 Impact Factor
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    ABSTRACT: Restricting oxygen delivery during the reperfusion phase of cardiopulmonary bypass (CPB) protects the heart, but effects on lung ischemia reperfusion (IR) in CPB are unknown. We examined whether extracellular high mobility group box 1 (HMGB1) mediated inflammation during early lung IR injury in CPB. Fourteen healthy canines received CPB with 60 minutes of aortic clamping and cardioplegic arrest, followed by 90 minutes reperfusion. Following surgery, the animals were randomized into control (n = 7) or test (n = 7) groups. Control animals received a constant level of 80% FiO(2) during the entire procedure, and the test group received a gradual increase in FiO(2) during the first 25 minutes of reperfusion. In the test group, the FiO(2) was initiated at 40% and increased by 10% every 5 minutes, to 80%. Histology, lung injury variables, HMGB1 expression, and inflammatory responses were assessed at baseline (T1) and at 25 minutes (T2) and 90 minutes (T3) after starting reperfusion. Treatment with controlled oxygen significantly suppressed lung pathologies, lung injury variables, and inflammatory responses (all P < .001). After lung IR injury, HMGB1 mRNA and protein expressions were significantly decreased in the controlled oxygen group (all P < .001). Controlled oxygen reperfusion is protective in the early stages of lung IR injury in a canine CPB model, and this protection is linked to HMGB1 downregulation.
    Experimental Lung Research 03/2012; 38(4):183-91. DOI:10.3109/01902148.2012.662667 · 1.75 Impact Factor
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    ABSTRACT: To compare the efficacy and tolerability of the regimen FOLFOX [1eucovorin (LV), 5-fluorouracil (5-Fu) and oxaliplatin] and the regimen PLF (Paclitaxel, leucovorin and 5-Fu) for treatment of advanced gastric adenocarcinoma. We retrospectively studied the clinical data of 132 patients with stage IV gastric adenocarcinoma treated by FOLFOX (group A, n=60) or PLF (group B, n=72). The tumor response rate, toxicity, time to progress (TTP) and overall survival (OS) were compared between the two groups. A total of 544 cycles were administrated in these patients. The overall response rate was 35.0% with FOLFOX regimen and 41.7% with PLF regimen, showing no significant difference between them (P>0.05). The TTP was 6.13-/+1.26 (95%CI, 3.65-8.61) months in group A, and 5.92-/+0.49 (95%CI, 4.97-6.87) months in group B; the OS was 10.67-/+1.55 (95%CI, 7.63-13.71) months in group A, and 10.8-/+3.07 (95%CI, 4.78-16.82) months in group B. Neither TTP or OS showed significant differences between the two groups (P>0.05). Five patients in group A (8.33%) and 8 in group B (11.11%) had grade 3 and 4 leukopenia. The non-hematological toxicities were mostly mild, including nausea, vomiting, stomatitis, diarrhea and alopecia. The main adverse effects were grade 1 or 2 sensory neuritis in FOLFOX group, and alopecia in PLF group, without significant difference between the two groups (P<0.05). Both FOLFOX and PLF can serve as effective first-line treatment of stage IV gastric adenocarcinoma with good tolerance.
    Nan fang yi ke da xue xue bao = Journal of Southern Medical University 10/2008; 28(9):1599-602.
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    ABSTRACT: To detect the nuclear factor kappa B (NF-kappaB) condition in human stage IV gastric carcinoma patients and to explore the correlation between NF-kappaB activation and survival of these patients after chemotherapy. Expression of NF-kappaB-p65 was determined by immunohistochemical analysis. Activity of NF-kappaB DNA-binding in carcinoma tissue was detected by electrophoretic mobility shift assay. Kaplan-Meier survival analysis was performed to show the relation between NF-kappaB and progression-free survival (PFS) or overall survival (OS) of the patients. The positive expression rate of NF-kappaB-p65 in 60 gastric cancer tissue samples was 76.7% (46/60). The expression of NF-kappaB-p65 was reduced in adjacent carcinoma and normal tissue samples. Electrophoretic mobility shift assay (EMSA) analysis showed a strong activation of NF-kappaB in cancer tissue samples. A survival difference was found in NF-kappaB-p65 positive and negative patients. NF-kappaB-p65 expression was negative in cancer tissue samples (n=14). PFS was 191.40+/-59.88 d and 152.93+/-16.99 d, respectively, in patients with positive NF-kappaB-p65 expression (n=46) (P=0.4028). The survival time of patients with negative and positive NF-kappaB-p65 expression was 425.16+/-61.61 d and 418.85+/-42.98 d, respectively (P=0.7303). Kaplan-Meier analysis showed no significant difference in PFS or OS. The 46 patient tissue which positive NF-kappaB-p65 expression was found in the tissue samples from the 46 patients whose PFS and OS were 564.89+/-75.94 d and s 352.37+/-41.32 d, respectively (P=0.0165). NF-kappaB is activated in gastric carcinoma tissue, which is related to the OS after chemotherapy.
    World Journal of Gastroenterology 09/2008; 14(30):4739-44. · 2.43 Impact Factor
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    ABSTRACT: This study aimed to investigate the impact of mild hypothermia on cerebral blood perfusion in rats with chronically hypoperfused brain. After ischemia/reperfusion, 12 male healthy Sprague Dawley (SD) rats were randomly divided into normal temperature group (group NT, n=6) and mild hypothermia group (group MH, n=6). The cerebral hypoperfusion model was successfully established by end-to-end anastomosis of the right common carotid artery and the right external jugular vein. After hypoperfusion for 6 weeks, blood perfusion restored, and rectal temperature was maintained at 37°C with a controllable incubation pad in the NT group, while the rectal temperature was maintained at 32°C in the MH group. Rats were re-warmed 3 h after reperfusion. Local cerebral blood perfusion (LCBP) was determined with a laser Doppler flow perfusion imager before reperfusion (T1), immediately after reperfusion (T2) and 48 h after reperfusion (T3). Rats were sacrificed 48 h after reperfusion to observe the ultramicrostructure of brain tissues under transmission electron microscope. In the MH group, LCBP was slightly decreased immediately after reperfusion, and LCBP 48 h after reperfusion restored to the baseline before reperfusion. However, LCBP was significantly decreased immediately and 48 h after reperfusion in the NT group, and the LCBP did not restore to the baseline before reperfusion. In both groups, brain cells at the reperfusion side were swollen, degenerated or even necrotic at different degrees, but the degree of brain damage was slighter in the MH group. The results indicate appropriate early-stage mild hypothermia which may reverse cerebral hypoperfusion and ischemia in rats with chronic cerebral hypoperfusion after reperfusion.

Publication Stats

38 Citations
37.55 Total Impact Points


  • 2012–2015
    • Sun Yat-Sen University
      • • State Key Laboratory of Oncology
      • • Department of Anaesthesiology
      • • Department of Medical Oncology
      Shengcheng, Guangdong, China
  • 2013
    • Sun Yat-Sen University of Medical Sciences
      Huicheng, Guangdong, China