Changes in Serum Interleukin-8 Levels Predict Response to Immune Checkpoint Inhibitors Immunotherapy in Unresectable Hepatocellular Carcinoma Patients.

Background: Effective biomarkers are needed to predict the efficacy of immune checkpoint inhibitors (ICIs) therapy in hepatocellular carcinoma (HCC). We evaluated the early changes in serum interleukin-8 (IL-8) levels as a biomarker of response to ICIs in patients with unresectable HCC. Methods: Eighty patients who received ICIs therapy alone or in combination with other treatments for unresectable HCC were included. Serum was collected at baseline and 2-4 weeks after the first dose. Serum IL-8 levels were measured using by ELISA. Results: In the progressive disease (PD) group, serum IL-8 levels increased significantly before the second dose of ICIs therapy compared with baseline levels (P < 0.001). Early changes in serum IL-8 levels were significantly associated with the response to ICIs therapy (P < 0.001). A cutoff value of 8.1% increase over the baseline most effectively predicted the response to ICIs. Increases in serum IL-8 levels > 8.1% indicated the uselessness of ICIs immunotherapy in patients with unresectable HCC. Patients with increases in serum IL-8 levels > 8.1% had significantly shorter overall survival (OS) and progression-free survival (PFS) than those with increases in serum IL-8 levels ≤ 8.1% (P < 0.001). Increases in serum IL-8 levels > 8.1% were independent prognosticators of worse OS (P = 0.003) and PFS (P < 0.001). Conclusion: Early changes in serum IL-8 levels, measured only 2-4 weeks after starting therapy, could predict the response to ICIs therapy, as well as OS and PFS of patients with unresectable HCC. Increases in serum IL-8 levels > 8.1% indicated the uselessness of ICIs immunotherapy and predicted worse OS and PFS.

Copper-catalyzed oxidative cyclization of 2-(1H-pyrrol-1-yl)aniline and alkylsilyl peroxides: a route to pyrrolo[1,2-a]quinoxalines.

An efficient method was developed for the one-pot construction of pyrrolo[1,2-a]quinoxalines via a Cu(II)-catalyzed domino reaction between 2-(1H-pyrrol-1-yl)anilines and alkylsilyl peroxides. This reaction proceeds through C-C bond cleavage and new C-C and C-N bond formation. A mechanistic study suggests that alkyl radical species participate in the cascade reaction.

Electrochemical oxidative dehydrogenative annulation of 1-(2-aminophenyl)pyrroles with cleavage of ethers to synthesize pyrrolo[1,2-a]quinoxaline derivatives.

An array of pyrrolo[1,2-a]quinoxaline derivatives were achieved with moderate to good yields via the electrochemical redox reaction, which includes the functionalization of C(sp3)-H bonds and the construction of C-C and C-N bonds. In this atom economic reaction, THF was used as both a reactant and a solvent, and H2 was the sole by-product.

RUNX1 promotes liver fibrosis progression through regulating TGF-ß signalling.

Liver fibrosis is caused by chronic liver injury. There are limited treatments for it, and the pathogenesis is unclear. Therefore, there is an urgent need to explore the pathogenesis of liver fibrosis, and to try to identify new potential therapeutic targets. For this study we used the carbon tetrachloride abdominal injection induced liver fibrosis animal model in mice. Primary hepatic stellate cell isolation was performed by a density-gradient separation method, and this was followed by immunofluorescence stain analyses. Signal pathway analysis was performed by dual-luciferase reporter assay and western blotting. Our results showed that RUNX1 was upregulated in cirrhotic liver tissues compared with normal liver tissues. Besides, overexpression of RUNX1 caused more severe liver fibrosis lesions than control group under CCl4 -induced conditions. Moreover, α-SMA expression in the RUNX1 overexpression group was significantly higher than in the control group. Interestingly, we found that RUNX1 could promote the activation of TGF-ß/Smads in a dual-luciferase reporter assay. Thus we demonstrated that RUNX1 could be considered as a new regulator of hepatic fibrosis by activating TGF-ß/Smads signalling. Based on this, we concluded that RUNX1 may be developed as a new therapeutic target in the treatment of liver fibrosis in the future. In addition, this study also provides a new insight about the aetiology of liver fibrosis.

TIPE1 promotes liver regeneration by enhancing ROS-FoxO1 axis mediated autophagy.

The strong regenerative ability of the liver safeguards the crucial hepatic functions. The balance between hepatocyte proliferation and death is critical for restoring liver size and physiology. Tumour necrosis factor (TNF) alpha-induced protein 8-like 1 (TIPE1) is highly expressed in liver and has been identified as a candidate regulator for cell proliferation and death, being involved in a variety of biological processes and diseases. However, the role of TIPE1 in liver regeneration remains unexplored. In the present study, we found that TIPE1 expression was elevated in the regenerating liver induced by either partial hepatectomy or 10% carbon tetrachloride administration. Mice with hepatocyte conditional Tipe1 knockout presented significantly impaired liver regeneration. Mechanistically, hepatic Tipe1 deficiency decreased the level of reactive oxygen species in hepatocytes, which in turn led to the inhibition of Forkhead box O1 acetylation and microtubule-associated protein 1 light chain 3 I to microtubule-associated protein 1 light chain 3 II conversion, and the accumulation of sequestosome 1. By contrast, forced expression of TIPE1 in hepatocyte significantly promoted liver regeneration following 70% partial hepatectomy and enhanced hepatocyte reactive oxygen species/acetylated-Forkhead box O1 level and autophagy. These findings indicate that TIPE1 plays a crucial role in liver regeneration by finely regulating the oxidative stress and autophagy and is a potential target for medical intervention of liver regeneration.

A novel four-gene of iron metabolism-related and methylated for prognosis prediction of hepatocellular carcinoma.

Hepatocellular carcinoma (HCC) is a liver disease with a complex underlying mechanism, and patients with HCC have low survival rates. Iron metabolism plays a crucial role in the pathogenesis of HCC; however, the prognostic value of iron metabolism-related and methylated genes for HCC needs to be further explored. In the present study, we identified differentially expressed genes (DEGs) that play a role in iron metabolism and DNA methylation in HCC from The Cancer Genome Atlas. Four of these DEGs, whose expression levels are correlated with HCC prognosis, namely, RRM2, FTCD, CYP2C9, and ATP6V1C1, were further used to construct a prognostic model for HCC, wherein the risk score was calculated using the gene expression of the four DEGs. This could be used to predict the overall survival of HCC patients for 1, 3, and 5 years. Results of a multivariate Cox regression analysis further indicated that the risk score was an independent variable correlated with the prognosis of HCC patients. The identified gene signature was further validated using an independent cohort of HCC patients from the International Cancer Genome Consortium. Weighted gene co-expression network analysis and gene set enrichment analysis were performed to identify potential regulatory mechanisms of the gene signature in HCC. Taken together, we identified key prognostic factors of iron metabolism-related and methylated genes for HCC, providing a potential treatment strategy for HCC.

Clinicopathological characteristics and surgical outcomes of sarcomatoid hepatocellular carcinoma.

BACKGROUND: Hepatocellular carcinoma (HCC) is the sixth most common type of cancer and the fourth leading cause of cancer-related death worldwide. Sarcomatoid HCC, which contains poorly differentiated carcinomatous and sarcomatous components, is a rare histological subtype of HCC that differs from conventional HCC. It is highly aggressive and has a poor prognosis. Its clinicopathological characteristics, surgical outcomes and underlying mechanisms of its highly aggressive nature have not been fully elucidated. AIM: To examine the clinicopathological characteristics and surgical outcomes of sarcomatoid HCC and explore the histogenesis of sarcomatoid HCC. METHODS: In total, 196 patients [41 sarcomatoid HCC and 155 high-grade (Edmondson-Steiner grade III or IV) HCC] who underwent surgical resection between 2007 and 2017 were retrospectively reviewed. The characteristics and surgical outcomes of sarcomatoid HCC were compared with those of patients with high-grade HCC. The histological composition of invasive and metastatic sarcomatoid HCCs was evaluated. RESULTS: Sarcomatoid HCC was more frequently diagnosed at an advanced stage with a larger tumor and higher rates of nonspecific symptom, adjacent organ invasion and lymph node metastasis than high-grade HCC (all P < 0.05). Compared with high-grade HCC patients, sarcomatoid HCC patients are less likely to have typical dynamic imaging features of HCC (44.4% vs 72.7%, P = 0.001) and elevated serum alpha-fetoprotein levels (> 20 ng/mL; 36.6% vs 78.7%, P < 0.001). The sarcomatoid group had a significantly shorter median recurrence-free survival (5.6 mo vs 16.4 mo, log-rank P < 0.0001) and overall survival (10.5 mo vs 48.1 mo, log-rank P < 0.0001) than the high-grade group. After controlling for confounding factors, the sarcomatoid subtype was identified as an independent predictor of poor prognosis. Pathological analyses indicated that invasive and metastatic lesions were mainly composed of carcinomatous components. CONCLUSION: Sarcomatoid HCC was associated with a more advanced stage, atypical dynamic imaging, lower serum alpha-fetoprotein levels and a worse prognosis. The highly aggressive nature of sarcomatoid HCC is perhaps mediated by carcinomatous components.

Interleukin-6 Promotes Epithelial-Mesenchymal Transition and Cell Invasion through Integrin ß6 Upregulation in Colorectal Cancer.

The metastatic potential of colorectal cancer (CRC) is intensively promoted by the tumor microenvironment (TME) in a paracrine manner. As a pleiotropic inflammatory cytokine, Interleukin-6 (IL-6) is produced and involved in CRC, the same scenario where integrin αvß6 also becomes upregulated. However, the relationship between IL-6 and integrin αvß6 as well as their involvement in the crosstalk between CRC and TME remains largely unclear. In the present study, we demonstrated a positive correlation between the expression of IL-6 and integrin ß6 in CRC samples. The mutually promotive interaction between CRC and TME was further determined by an indirect coculture system. CRC cells could augment the secretion of IL-6 from fibroblasts, which in return induced invasion and integrin ß6 expression of CRC cells. Through the classic IL-6 receptor/STAT-3 signaling pathway, IL-6 mediated the upregulation of integrin ß6, which was involved in the invasion and epithelial-mesenchymal transition of CRC cells induced by IL-6. Taken together, our results reveal a paracrine crosstalk between IL-6 signals originating from the TME and increased the integrin ß6 level of CRC. IL-6 induces CRC invasion via upregulation of integrin ß6 through the IL-6 receptor/STAT-3 signaling pathway. Combined inhibition of IL-6 along with integrin ß6-targeted strategy may indicate new directions for antitumor strategies for CRC.

Integrin αvß6 predicts poor prognosis and promotes resistance to cisplatin in hilar cholangiocarcinoma.

OBJECTIVE: Integrin αvß6 is associated with an extremely aggressive cancer phenotype. However, little is known about the clinicopathological significance and prognostic value of integrin αvß6 in human hilar cholangiocarcinoma. METHODS: In the present study, bioinformatics analysis demonstrated a significant increase of integrin ß6 gene expression in cholangiocarcinoma tissues compared to non-tumorous tissues, which was further validated in clinical samples through RT-qPCR and western blotting analyses. Integrin αvß6 was observed to be expressed in 48.6% of tumors, and its expression was related to a poor tumor differentiation (p = 0.002), lymph node metastasis (p<0.001) and advanced TNM stage (p=0.001). Furthermore, patients who were αvß6-positive showed a significantly shorter overall survival period than those who were αvß6-negative (p=0.004). Multivariate analysis confirmed that integrin αvß6 was an independent prognostic factor (p=0.002). In addition, loss- and gain-of-function assays showed integrin αvß6 not only played an important role in colony formation, but also protected cholangiocarcinoma cells from cisplatin-induced growth inhibition and apoptosis. ERK/MAPK signaling pathway was involved in integrin αvß6-mediated resistance of cholangiocarcinoma cells to cisplatin. CONCLUSIONS: Taken together, the present findings revealed that integrin αvß6 could serve as a potential prognostic predictor and contribute to cisplatin resistance, which might prove to be a promising target candidate for the clinical intervention of human hilar cholangiocarcinoma.

Interleukin-8 promotes integrin ß3 upregulation and cell invasion through PI3K/Akt pathway in hepatocellular carcinoma.

BACKGROUND: Interleukin-8 (IL-8) plays a vital role in the invasion and metastasis of hepatocellular carcinoma (HCC), and is closely associated with poor prognosis of HCC patients. Integrin αvß3, a member of the integrin family, has been reported to be overexpressed in cancer tissues and mediate the invasion and metastasis of HCC cells. However, the relationship between IL-8 and integrin αvß3 in HCC and the underlying mechanism of IL-8 and integrin αvß3 in the invasion of HCC remains unclear. METHODS: The expression of IL-8, integrin αv and integrin ß3 in HCC cells and tissues was detected by quantitative real-time PCR, Western blot and immunohistochemistry. Transwell assay and Western blot was used to detect the invasiveness, the expression of integrin ß3 and the activation of PI3K/Akt pathway of HCC cells pretreated with IL-8 knockdown or exogenous IL-8. RESULTS: IL-8, integrin αv and integrin ß3 were overexpressed in highly metastatic HCC cell lines compared with low metastatic cell lines. There was a positive correlation between integrin ß3 and IL-8 expression in HCC tissues. IL-8 siRNA transfection reduced HCC cell invasion and the levels of integrin ß3, p-PI3K and p-Akt. IL-8 induced HCC cell invasion and integrin ß3 expression was significantly inhibited by transfection with CXCR1 siRNA or CXCR2 siRNA. When we stimulated HCC cells with exogenous IL-8, cell invasion and the levels of integrin ß3, p-PI3K, and p-Akt increased, which could be effectively reversed by adding PI3K inhibitor LY294002. CONCLUSIONS: Our results suggest that IL-8 promotes integrin ß3 upregulation and the invasion of HCC cells through activation of the PI3K/Akt pathway. The IL-8/CXCR1/CXCR2/PI3K/Akt/integrin ß3 axis may serve as a potential treatment target for patients with HCC.

Dynamic analysis of self-forming dynamic membrane (SFDM) filtration in submerged anaerobic bioreactor: Performance, characteristic, and mechanism.

This study attempts to provide an improved fundamental understanding of the self-forming dynamic membrane (SFDM) filtration process in submerged anaerobic bioreactors. Excellent system performances were achieved in terms of high COD removal efficiency (∼ 90%), fast formation/reformation of SFDM (<1 h), and sustainable low-resistance (3.92 × 1010 m-1) high-flux (10-30 L/m2·h) filtration. A typical flux-variation profile consisted of an initial abruptly fast decrease followed by a gradually slow reduction, corresponding to the formation and sustainable operation period, respectively. The increase of SFDM resistance in formation period was attributable to the fast deposition of large particles on coarse-pore support materials. After SFDM formation, the subsequent increase of SFDM resistance was controlled more by the increase of specific resistance, which was firstly mainly resulted from the increasing accumulation of small particles with higher hydrophobicity and the external deposition of eEPS but later most attributable to the increase of internal release of eEPS.

MFG-E8 overexpression promotes colorectal cancer progression via AKT/MMPs signalling.

Several studies have revealed that MFG-E8 (milk fat globule-epidermal growth factor 8) is related to tumour development and progression. However, the relationship between MFG-E8 expression and metastasis in colorectal cancer patients and the role of MFG-E8 in colorectal cancer invasion and progression remain unknown. In this study, we performed immunohistochemistry and quantitative real-time polymerase chain reaction to assess MFG-E8 expression in colorectal cancer and adjacent non-cancerous tissues. Colorectal cancer RNAseq data from The Cancer Genome Atlas project were downloaded and MFG-E8 expression was analysed. Gene set enrichment analysis was performed for gene ontology and pathway analysis associated with MFG-E8 expression. For in vitro studies, we used lentivirus-mediated MFG-E8 RNA interference and commercialized recombinant human MFG-E8 to investigate its role in colorectal cancer cell growth, migration and invasion. It seems that MFG-E8 was overexpressed in advanced colorectal cancer tissues compared with early-stage colorectal cancer tissues and adjacent non-cancerous tissues. Correlation analysis revealed that MFG-E8 expression was significantly related to plasma membrane invasion, lymph node metastasis, distant metastasis and tumour-node-metastasis stage. Survival analysis revealed that high MFG-E8 expression predicted a poorer prognosis than low MFG-E8 expression group both in our colorectal cancer cohort and The Cancer Genome Atlas colorectal cancer cohort. In vitro study suggested that MFG-E8 knockdown can suppress the growth of colorectal cancer cells without affecting the expression of the proliferation-related gene Ki67. MFG-E8 knockdown also suppressed colorectal cancer cell migration and invasion, a change accompanied by MMP-2 and MMP-9 downregulation. Moreover, MFG-E8 knockdown induced a shift from mesenchymal makers to epithelial makers, while pretreatment with rhMFG-E8 had the opposite effect. The effect of MFG-E8 on colorectal cancer cell migration, invasion and epithelial-to-mesenchymal was partially dependent on the PI3K/AKT signalling pathway. These findings provide a better understanding of the molecular mechanism underlying colorectal cancer progression and suggest a predictive role for MFG-E8 in colorectal cancer metastasis and prognosis.

A noninvasive model to predict liver histology in HBeAg-positive chronic hepatitis B with alanine aminotransferase ≤ 2upper limit of normal.

BACKGROUND AND AIM: Liver biopsy remains the gold standard to evaluate liver histology. However, it has several limitations. This study aims to construct a noninvasive model to predict liver histology for commencing antiviral therapy in HBeAg-positive chronic hepatitis B (CHB) with aminotransferase (ALT) ≤ 2 upper limit of normal (ULN). METHODS: Two hundred and ninety-eight patients with HBeAg-positive CHB, ALT ≤ 2ULN and HBV-DNA ≥20 000 IU/ml were enrolled and randomly divided into a training group and a validation group. A noninvasive model was constructed in the training group to predict significant liver histological change [necroinflammatory activity grade (G) ≥ 2 or fibrosis stage (S) ≥ 2] and then validated in the validation group. RESULTS: Aspartate aminotransferase, HBsAg, platelet, and albumin were identified as independent predictors. A model was constructed by them. It had an area under the receiver operating characteristic curve of 0.875 in the training group, 0.858 in the validation group and 0.868 in the entire cohort. Using a cut-off point of -0.96, it showed 93% sensitivity, 90% negative predictive value (NPV) in the training group and 95% sensitivity, 94% NPV in the validation group. Using a cut-off point of 0.96, it showed 95% specificity, 91% positive predictive value (PPV) in the training group and 89% specificity, 80% PPV in the validation group. CONCLUSIONS: This study constructed a noninvasive model to predict liver histology in HBeAg-positive CHB with ALT ≤ 2ULN, which might reduce the clinical need for liver biopsy.

High promoter methylation levels of glutathione-S-transferase M3 predict poor prognosis of acute-on-chronic hepatitis B liver failure.

AIM: This study aimed to evaluate the prognostic value of glutathione-S-transferase M3 (GSTM3) gene promoter methylation in patients with acute-on-chronic hepatitis B liver failure (ACHBLF). METHODS: A total of 119 patients with ACHBLF, 60 patients with chronic hepatitis B and 30 healthy controls were enrolled. We used a quantitative methylation detection technique, MethyLight, to examine the methylation levels of GSTM3 in peripheral blood mononuclear cells. RESULTS: The GSTM3 methylation level was significantly higher in patients with ACHBLF than those in patients with chronic hepatitis B and healthy controls (both P < 0.05). In patients with ACHBLF, GSTM3 methylation level percentage of methylated reference (PMR) positively correlated with total bilirubin, international normalized ratio, and Model for End-stage Liver Disease (MELD) score, and negatively correlated with prothrombin activity and albumin (all P < 0.05). The PMR for GSTM3 of non-survivors was significantly increased compared to that of survivors (P < 0.05). Multivariate analysis indicated that GSTM3 methylation level was one of the independent prognostic factors for 3-month mortality of ACHBLF (P = 0.000). The area under the receiver-operator characteristic curve of PMR for GSTM3 in predicting 3-month mortality of ACHBLF was not statistically different from that of MELD score (0.798 vs. 0.716, P = 0.152). However, the area under the curve of PMR for GSTM3 was significantly higher than that of MELD score in predicting 1-month mortality (0.887 vs. 0.737, P = 0.020). CONCLUSION: Promoter methylation levels of GSTM3 in peripheral blood mononuclear cells closely correlated with disease severity and could be used to predict prognosis of patients with ACHBLF.

Methylation of tissue factor pathway inhibitor 2 as a prognostic biomarker for hepatocellular carcinoma after hepatectomy.

BACKGROUND AND AIM: Methylation of tissue factor pathway inhibitor 2 (TFPI2) gene has been detected in hepatocellular carcinoma (HCC). However, the clinicopathologcial significance and prognostic value of TFPI2 methylation in HCC remains largely unknown. This study aimed to investigate the prognostic value of TFPI2 methylation in HCC after hepatectomy. METHODS: Methylation status of TFPI2 gene was examined in 178 surgical specimens of HCC and 20 normal liver samples using methylation-specific polymerase chain reaction. RESULTS: Methylation of TFPI2 gene was detected in 44.9% (80 of 178) of primary HCC samples, 10.7% (19 of 178) of the corresponding non-tumorous liver samples, and 5.0% (1/20) of the normal liver samples. The mRNA concentrations of TFPI2 in primary HCC tissues were significantly lower than those in corresponding non-tumorous liver tissues and those in normal liver tissues. TFPI2 methylation was significantly associated with higher TNM stage. Patients with TFPI2 methylation demonstrated a significantly poorer prognosis than those without TFPI2 methylation for both overall survival and disease-free survival (P < 0.001, respectively). Multivariate analyses confirmed that TFPI2 methylation was an independent prognostic factor for both overall survival (P = 0.002) and disease-free survival (P = 0.000) in HCC after hepatectomy. Moreover, TFPI2 methylation was found to be the only independent predictor for early tumor recurrence of HCC after resection based on multivariate analysis (P = 0.002). CONCLUSIONS: Methylation of TFPI2 predicts high risk of advanced tumor stage, early tumor recurrence, and poor prognosis, and it could be a potential prognostic biomarker in patients with HCC after hepatectomy.

Yiguanjian cataplasm attenuates opioid dependence in a mouse model of naloxone-induced opioid withdrawal syndrome.

OBJECTIVE: To investigate the effect of Yiguanjian (YGJ) cataplasm on the development of opioid dependence in a mouse model of naloxone-induced opioid withdrawal syndrome. METHODS: One hundred Swiss albino mice, of equal male to female ratio, were randomly and equally divided into 10 groups. A portion (3 cm2) of the backside hair of the mice was removed 1 day prior to the experiment. Morphine (5 mg/kg) was intraperitoneally administered twice daily for 5 days. YGJ cataplasm was prepared and pasted on the bare region of the mice immediately before morphine administration on day 3 and subsequently removed at the end day 5. On day 6, naloxone (8 mg/kg) was intraperitoneally injected to precipitate opioid withdrawal syndrome. Behavioral observation was performed in two 30-min phases immediately after naloxone injection. RESULTS: The YGJ cataplasm significantly and dose-dependently attenuated morphine-naloxone- induced experimental opioid withdrawal, in terms of withdrawal severity score and the frequencies of jumping, rearing, forepaw licking, and circling behaviors. However, YGJ cataplasm treatment did not alter the acute analgesic effect of morphine. CONCLUSION: YGJ cataplasm could attenuate opioid dependence and its associated withdrawal symptoms. Therefore, YGJ cataplasm could serve as a potential therapy for opioid addiction in the future.

Interleukin-8 is a prognostic indicator in human hilar cholangiocarcinoma.

Interleukin-8 (IL-8), matrix metalloproteinase-9 (MMP-9) and neovascularization have been implicated to be associated with biological processes, especially cancer progression. However, few studies have investigated the role of IL-8 in human hilar cholangiocarcinoma. In this study we detected the expression of IL-8 combined with MMP-9 and microvessel density (MVD) in hilar cholangiocarcinoma to evaluate their clinicopathological significance and prognostic value. A total of 62 patients with hilar cholangiocarcinoma who underwent curative surgery were enrolled in this study. The expression of IL-8, MMP-9 and MVD were examined immunohistochemically. The correlation of IL-8 with MMP-9 expression, MVD, clinicopathological features and survival time of patients were then analyzed. Expression of IL-8 was observed in 56.5% tumors, which was related to advanced TNM stage (P = 0.026) and tumor recurrence (P = 0.018). IL-8 had a positive correlation with MMP-9 expression and MVD. Furthermore, patients with high IL-8 expression had a significantly shorter overall survival than those with low IL-8 expression (P = 0.01). Multivariate analysis confirmed IL-8 as an independent prognostic factor (P = 0.005). In conclusion, IL-8 expression significantly correlated with MMP-9 expression and MVD, and IL-8 was a valuable prognostic factor for human hilar cholangiocarcinoma.

Demethylation of tumor necrosis factor-α converting enzyme promoter associated with high hepatitis B e antigen level in chronic hepatitis B.

AIM: To evaluate tumor necrosis factor-α converting enzyme (TACE) methylation status in patients with chronic hepatitis B (CHB). METHODS: Eighty patients with hepatitis B e antigen (HBeAg)-positive CHB, 80 with HBeAg-negative CHB, and 40 healthy controls (HCs) were randomly enrolled in this study. Genomic DNA was extracted from peripheral blood mononuclear cells and methylation status of TACE promoter was determined by methylation-specific polymerase chain reaction. The clinical and laboratory parameters were collected. RESULTS: One hundred and thirty of 160 patients with CHB (81.25%) and 38 of 40 HCs (95%) displayed TACE promoter methylation. The difference was significant (χ (2) = 4.501, P < 0.05). TACE promoter methylation frequency in HBeAg-positive CHB (58/80, 72.5%) was significantly lower than that in HBeAg-negative CHB (72/80, 90%; χ (2) = 8.041, P < 0.01) and HCs (χ (2) = 8.438, P < 0.01). However, no significant difference was observed in the methylation frequency between HBeAg-negative CHB and HCs (χ (2) = 0.873, P > 0.05). In the HBeAg-positive group, TACE methylation frequency was significantly negatively correlated with HBeAg (r = -0.602, P < 0.01), alanine aminotransferase (r = -0.461, P < 0.01) and aspartate aminotransferase (r = -0.329, P < 0.01). CONCLUSION: Patients with HBeAg-positive CHB have aberrant demethylation of the TACE promoter, which may potentially serve as a biomarker for HBeAg seroconversion.

Serum wnt5a is a predictor for the prognosis of acute on chronic hepatitis B liver failure.

OBJECTIVES: To find a biomarker to predict the prognosis of acute on chronic hepatitis B liver failure (ACHBLF). METHODS: Expression gene profiles in wnt pathway were determined in serum from 63 patients with ACHBLF, 60 patients with chronic hepatitis B (CHB) and 30 healthy controls (HCs). RESULTS: Serum wnt5a concentration of 1.553 ng/ml showed a poor prognosis with a sensitivity of 69.23% and a specificity of 83.33% in ACHBLF patients. CONCLUSIONS: Serum wnt5a gene expression might be a potential biomarker for predicting the prognosis of ACHBLF.

Interleukin-8 promotes cell migration through integrin αvß6 upregulation in colorectal cancer.

Colorectal cancer (CRC), which is notorious for high morbidity and mortality around the world, shows a predilection for metastasis to liver. Interleukin-8 (IL-8), a chemokine with a defining CXC amino acid motif, has been reported to promote CRC cell migration and is associated with poor prognosis of CRC. However, the underlying molecular mechanism of IL-8-mediated migration remains obscure. In this study, we first demonstrated the cross talk between IL-8 and integrin αvß6. We analyzed 139 human CRC samples, and found that the immunohistochemical expression of αvß6 was significantly correlated with expression of IL-8. Furthermore, IL-8 increased the migration through integrin αvß6 in human CRC cells, and both CXCR1 and CXCR2 were primarily involved during the process. IL-8 upregulated αvß6 expression in a dose-dependent manner through activation of ERK and Ets-1 signaling pathway. Taken together, our results indicated that IL-8 enhances the migration of CRC cells by increasing αvß6 integrin expression through the ERK/Ets-1 pathway. Targeting integrin αvß6 in IL-8 expressing tumors might be a potential therapeutic strategy for CRC patients.