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Xu JM, Weng MZ, Song FB, Chen JY, Zhang JY, Wu JY, Qin J, Jin T, Wang XL. Blockade of the CXCR6 signaling inhibits growth and invasion of hepatocellular carcinoma cells through inhibition of the VEGF expression. Int J Immunopathol Pharmacol 2015; 27:553-61. [PMID: 25572735 DOI: 10.1177/039463201402700411] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Chemokines have been shown to play a critical role in tumor development and progression. However, little is known about the function and molecular mechanisms of CXCR6 in multiple malignancies. In the present study, we aimed to investigate the role of CXCR6 in human hepatocellular carcinoma (HCC). The expression of CXCR6 was examined by immunohistochemical assay using a tissue microarray procedure. A loss-of-function experiment was performed to explore the effects of lentivirus-mediated CXCR6 shRNA (shCXCR6) on cell proliferation and invasive potential by MTT and Transwell assays in HCC cell line (SMMC-7721). It was found that the expression of CXCR6 protein was significantly increased in HCC tissues compared with that in adjacent non-cancerous tissues (ANCT) (63.04% vs 36.96%, P=0.019), and correlated with the lymph-vascular space invasion in HCC patients (P=0.038). Knockdown of CXCR6 repressed cell proliferation and invasion of HCC cells followed by the down-regulation of vascular endothelial growth factor (VEGF). Taken together, our findings show that high expression of CXCR6 is positively associated with distant invasion of HCC patients, and blockade of CXCR6 signaling suppresses the growth and invasion of HCC cells through inhibition of the VEGF expression, suggesting that CXCR6 may represent a promising therapeutic target for the treatment of HCC.
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Affiliation(s)
- J M Xu
- Department of General Surgery, Shanghai First Peoples Hospital, Shanghai Jiaotong University, Shanghai, China
| | - M Z Weng
- Department of General Surgery, Shanghai First Peoples Hospital, Shanghai Jiaotong University, Shanghai, China
| | - F B Song
- Department of General Surgery, Shanghai First Peoples Hospital, Shanghai Jiaotong University, Shanghai, China
| | - J Y Chen
- Department of General Surgery, Shanghai First Peoples Hospital, Shanghai Jiaotong University, Shanghai, China
| | - J Y Zhang
- Department of General Surgery, Shanghai First Peoples Hospital, Shanghai Jiaotong University, Shanghai, China
| | - J Y Wu
- Department of General Surgery, Shanghai First Peoples Hospital, Shanghai Jiaotong University, Shanghai, China
| | - J Qin
- Department of General Surgery, Shanghai First Peoples Hospital, Shanghai Jiaotong University, Shanghai, China
| | - T Jin
- Department of General Surgery, Shanghai First Peoples Hospital, Shanghai Jiaotong University, Shanghai, China
| | - X L Wang
- Department of General Surgery, Shanghai First Peoples Hospital, Shanghai Jiaotong University, Shanghai, China
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Probst S, Song FB, Bushev PA, Ustinov AV, Weides M. Efficient and robust analysis of complex scattering data under noise in microwave resonators. Rev Sci Instrum 2015; 86:024706. [PMID: 25725869 DOI: 10.1063/1.4907935] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Superconducting microwave resonators are reliable circuits widely used for detection and as test devices for material research. A reliable determination of their external and internal quality factors is crucial for many modern applications, which either require fast measurements or operate in the single photon regime with small signal to noise ratios. Here, we use the circle fit technique with diameter correction and provide a step by step guide for implementing an algorithm for robust fitting and calibration of complex resonator scattering data in the presence of noise. The speedup and robustness of the analysis are achieved by employing an algebraic rather than an iterative fit technique for the resonance circle.
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Affiliation(s)
- S Probst
- Physikalisches Institut, Karlsruhe Institute of Technology, D-76128 Karlsruhe, Germany
| | - F B Song
- Physikalisches Institut, Karlsruhe Institute of Technology, D-76128 Karlsruhe, Germany
| | - P A Bushev
- Experimentalphysik, Universität des Saarlandes, D-66123 Saarbrücken, Germany
| | - A V Ustinov
- Physikalisches Institut, Karlsruhe Institute of Technology, D-76128 Karlsruhe, Germany
| | - M Weides
- Physikalisches Institut, Karlsruhe Institute of Technology, D-76128 Karlsruhe, Germany
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Tian WQ, Wang HC, Song FB, Zan LS, Wang H, Wang HB, Xin YP, Ujan JA. Association between a single nucleotide polymorphism in the bovine chemerin gene and carcass traits in Qinchuan cattle. Genet Mol Res 2011; 10:2833-40. [PMID: 22095607 DOI: 10.4238/2011.november.17.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Qinchuan is a red or yellow draft and beef breed in China. In order to identify a predictor of carcass traits on the basis of associations between carcass traits and gene polymorphism, variation in the bovine chemerin gene was investigated using PCR-single-strand conformational polymorphism and DNA sequencing. An SNP of A868G located in exon 2 of the Bos taurus chemerin gene was detected in 716 samples of six breeds (Jiaxian red, Luxi, Nan yang, Qinchuan, Simmental and Luxi crossbred steers, and Xia'nan), all in China, and three genotypes (AA, AG and GG) were found. Based on the χ(2) test, the AA/AG/GG genotype frequencies of all six breeds were found to be in Hardy-Weinberg equilibrium. A possible association of A868G with some carcass traits was investigated in 106 Qinchuan cattle. Animals with the AG genotype were found to have significantly lower mean loin eye area and meat tenderness compared to those with the AA and GG genotypes. However, there was no significant association between any individual haplotype and backfat thickness, water holding capacity or marbling score. We suggest that A868G could be used as a molecular marker in marker-assisted selection for carcass traits.
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Affiliation(s)
- W Q Tian
- College of Animal Science and Technology, Northwest A & F University, Yangling, Shaanxi, PR China
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Wang H, Zan LS, Wang HB, Song FB. A novel SNP of the C/EBPα gene associated with superior meat quality in indigenous Chinese cattle. Genet Mol Res 2011; 10:2069-77. [PMID: 21968624 DOI: 10.4238/vol10-3gmr1032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
CCAAT/enhancer-binding protein alpha (C/EBPα) is an essential transcriptional factor regulating the differentiation of adipocytes. We report a novel single nucleotide polymorphism (C271A) of the C/EBPα gene in six indigenous Chinese cattle breeds using PCR-SSCP and DNA sequencing methods. Allele frequencies were investigated and evaluated by the χ(2) test in 817 individuals; all populations were found to be in Hardy-Weinberg equilibrium. Gene heterozygosity, effective allele numbers and polymorphism information content of the C/EBPα locus varied from 0.50 to 0.54, 1.84 to 1.99 and 0.35 to 0.37, respectively. We also evaluated a potential association of the C/EBPα SNP with ultrasound traits in 555 individuals; individuals of the AA genotype had greater ultrasound backfat thickness than did genotype CC (0.36 versus 0.34 cm, P < 0.01); genotypes AA and CA had higher ultrasound marbling scores than did genotype CC (3.53, 3.52 versus 3.37, P < 0.05). Analysis based on meat quality data in another 204 Qinchuan cattle showed that animals with genotype AA had bigger loin eye areas than did genotype CA (87.10 versus 79.08 cm(2), P < 0.05). These results indicate that the C271A SNP of the C/EBPα gene could be used as a molecular marker for selecting beef cattle with superior carcass traits.
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Affiliation(s)
- H Wang
- College of Animal Science and Technology, Northwest Agricultural and Foresty University, Yangling, Shaanxi, PR China
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