Zhi-Qiang Hu - Academia.edu (original) (raw)
Papers by Zhi-Qiang Hu
Applied Mechanics and Materials, 2014
Acta Crystallographica Section E Structure Reports Online
In the title compound, C16H19Cl2N3O2, the dihedral angle between the two rings is 86.26 (2)°. The... more In the title compound, C16H19Cl2N3O2, the dihedral angle between the two rings is 86.26 (2)°. The crystal packing is stabilized mainly by van der Waals interactions.
Key Engineering Materials, 2007
Acta Crystallographica Section E Structure Reports Online, 2008
Acta Crystallographica Section E Structure Reports Online, 2007
ABSTRACT In the title compound, C8H10N2O6S2, all bond lengths and angles are normal. The molecule... more ABSTRACT In the title compound, C8H10N2O6S2, all bond lengths and angles are normal. The molecules are packed into a three-dimensional network by intermolecular C-H center dot center dot center dot O hydrogen bonds and weak pi-pi aromatic stacking interactions [centroid separation = 4.078 (2) angstrom].
Oncotarget, Jan 16, 2016
The semaphorins were originally identified as having roles as guidance cues during neural develop... more The semaphorins were originally identified as having roles as guidance cues during neural development. Class 3 semaphorins are involved in cancer progression. However, the roles of class 3 semaphorins in hepatocellular carcinoma (HCC) are unknown. We examined the expression levels of class 3 semaphorins in HCC cell lines with different metastatic potential and in carcinoma tissue samples. The results indicated that Semaphorin 3A expression was up-regulated in metastatic cell lines and in samples from patients with tumor recurrence. Cell functional studies revealed that Semaphorin 3A promoted HCC cell proliferation, migration, and invasion. Animal studies indicated that Semaphorin 3A overexpression enhanced tumor growth and lung metastasis. Semaphorin 3A also acted as a chemoattractant involved in direct recruitment of macrophages in vitro, and facilitated tumor-associated macrophage (TAM) infiltration in vivo. Multivariate analysis revealed that Semaphorin 3A expression alone, or co...
Gastroenterology, Jan 25, 2016
Neutrophils can either promote or inhibit tumor progression, depending on the tumor microenvironm... more Neutrophils can either promote or inhibit tumor progression, depending on the tumor microenvironment, via release of cytokines. Neither the factors produced by tumor-associated neutrophils (TANs) nor their effects on tumor progression have been characterized. We investigated the roles of TANs in progression of hepatocellular carcinoma (HCC) using cell lines and immune cells isolated from patients. We performed studies with HepG2, PLC/PRF/5, MHCC97H and HCCLM3 human and Hepa1-6 and H22 mouse HCC cell lines; expression of chemokines and cytokines were knocked down with small hairpin RNAs. Cells were analyzed in chemotaxis assays and as growth as tumors in mice. HCC tissues and peripheral blood were collected from 20 patients undergoing curative resection or 20 healthy individuals (controls) in 2012 at Zhongshan Hospital in China. TANs and peripheral blood neutrophils (PBNs) were isolated and exposed to conditioned media from HCC cell lines; reverse transcription PCR was used to quanti...
Hepatology (Baltimore, Md.), Jan 11, 2016
MicroRNAs (miRNAs) play a critical role in the regulation of tumor metastasis. The role of these ... more MicroRNAs (miRNAs) play a critical role in the regulation of tumor metastasis. The role of these molecules in hepatocellular carcinoma (HCC), however, has not been fully elucidated. In this study, we employed miRNA-sequencing and identified 22 miRNAs involved in HCC metastasis. One of these, miR-28-5p, was downregulated in HCCs. This downregulation correlated with tumor metastasis, recurrence, and poor survival. Biofunctional investigations revealed that miR-28-5p deficiency promoted tumor growth and metastasis in nude mice without altering the in vitro biological characteristics of HCC cells. Through gene expression profiles and bioinformatics analysis, we identified interleukin-34 (IL-34) as a direct target of miR-28-5p, and the effects of miR-28-5p deficiency on HCC growth and metastasis was dependent on IL-34-mediated tumor-associated macrophage (TAMs) infiltration. Moreover, we found that TAMs induced by miR-28-5p-IL-34 signaling inhibit miR-28-5p expression on HCC cells via tr...
Microchimica Acta, 2014
ABSTRACT We report that a previously found fluorescent chemodosimeter for Hg(II) ions can also be... more ABSTRACT We report that a previously found fluorescent chemodosimeter for Hg(II) ions can also be used as a fluorescent probe for hypochlorous acid (HClO) in that its fluorescence intensity (excited at 520 nm and measured at 563 nm) is linearly proportional to the concentration of HClO in the 1-100 mu M range and with a 0.1 mu M detection limit. The probe can detect HClO with virtually no interference by Hg(II) and other metal ions. The mechanism for the high selectivity for HClO has been studied. The probe was applied to image hypochlorite in E. coli cells.
ChemistryOpen, 2015
The development of novel selective probes with high sensitivity for the detection of Al(3+) is wi... more The development of novel selective probes with high sensitivity for the detection of Al(3+) is widely considered an important research goal due to the importance of such probes in medicine, living systems and the environment. Here, we describe a new fluorescent probe, N'-(4-diethylamino-2-hydroxybenzylidene)-2-hydroxybenzohydrazide (1), for Al(3+). Probe 1 was evaluated in a solution of acetonitrile/water (1:1 v/v). Compared with previously reported probes for Al(3+), probe 1 can be synthesized easily and in high yield. A Job plot confirmed that probe 1 is able to complex Al(3+) in a 1:1 ratio, and the binding constant was determined to be 4.25×10(8) m(-1). Moreover, the detection limit was as low as 6.7×10(-9) m, suggesting that probe 1 has a high sensitivity. Common coexistent metal ions, such as K(+), Co(2+), Ca(2+), Ba(2+), Ni(2+), Pb(2+), Hg(2+), Ce(2+), Zn(2+), Cd(2+), Fe(3+), showed little or no interference in the detection of Al(3+) in solution, demonstrating the high s...
Advanced Materials Research, 2013
Advanced Materials Research, 2011
Advanced Materials Research, 2013
Advanced Materials Research, 2010
Cancer letters, Jan 28, 2015
Upregulation of CXCR2 in tumor cells has been documented in several types of cancer. As one of it... more Upregulation of CXCR2 in tumor cells has been documented in several types of cancer. As one of its ligands, CXCL5 is associated with neutrophil infiltration and poor prognosis in hepatocellular carcinoma (HCC). However, little is known about the role of the CXCR2/CXCL5 axis in the invasion and metastasis of HCC cells. In this study, we examined CXCR2 expression in human HCC cell lines and in three independent cohorts of HCC patients. The molecular effects of high expression levels of CXCR2 and CXCL5 in HCC cells were determined using qRT-PCR, western blot analysis, immunofluorescence, matrigel invasion assay, and xenograft mouse models. We found that high levels of CXCR2 correlated with progression and poor prognosis in human HCC. CXCR2/CXCL5 together promoted cell spreading by inducing the epithelial-mesenchymal transition (EMT) through activation of the PI3K/Akt/GSK-3β/Snail signaling pathway. In clinical HCC samples, high expression of both CXCR2 and CXCL5 showed a significant co...
Key Engineering Materials, 2013
ChemistryOpen, 2014
Recently, more and more rhodamine derivatives have been used as fluorophores to construct sensors... more Recently, more and more rhodamine derivatives have been used as fluorophores to construct sensors due to their excellent spectroscopic properties. A rhodamine-based fluorescent and colorimetric Fe(3+) chemosensor 3',6'-bis(ethylamino)-2-acetoxyl-2',7'-dimethyl-spiro[1H-isoindole-1,9'-[9H]xanthen]-3(2H)-one (RAE) was designed and synthesized. Upon the addition of Fe(3+), the dramatic enhancement of both fluorescence and absorbance intensity, as well as the color change of the solution, could be observed. The detection limit of RAE for Fe(3+) was around 7.98 ppb. Common coexistent metal ions showed little or no interference in the detection of Fe(3+). Moreover, the addition of CN(-) could quench the fluorescence of the acetonitrile solution of RAE and Fe(3+), indicating the regeneration of the chemosensor RAE. The robust nature of the sensor was shown by the detection of Fe(3+) even after repeated rounds of quenching. As iron is a ubiquitous metal in cells and plays vital roles in many biological processes, this chemosensor could be developed to have applications in biological studies.
Advanced Materials Research, 2013
Tetrahedron, 2005
The synthesis, structure and ring-closing metathesis (RCM) reactions of polyether bridged biscali... more The synthesis, structure and ring-closing metathesis (RCM) reactions of polyether bridged biscalix[4]arenes 6 in the partial cone conformation with upper rim allyl substituents are reported. The RCM reaction modes depend on the length of polyether chain. Diethylene glycolic chain produced the dimer 7a and linear oligomer 7a′ with multi-cavities, whereas triethylene and tetraethylene glycolic chains allowed direct cyclization through intramolecular head-to-tail pattern to yield novel bridged biscalix[4]arenes 7b–c.
Tetrahedron, 2006
Three sulfonamide-amide hybridized molecules and one cyclic analogue were synthesized and their a... more Three sulfonamide-amide hybridized molecules and one cyclic analogue were synthesized and their assembling behaviors in the solid state were investigated by X-ray crystallography. The results showed that the hybridized molecules could be not only induced to take up helical secondary structures by a network of intramolecular hydrogen bonds, but also utilized as useful building blocks for assembling into 1D zigzag chains and superhelices, 2D layers and further 3D networks. Moreover, it was found that the multiple C-H/O]S hydrogen bonds played an important role in the assembling processes. q
Applied Mechanics and Materials, 2014
Acta Crystallographica Section E Structure Reports Online
In the title compound, C16H19Cl2N3O2, the dihedral angle between the two rings is 86.26 (2)°. The... more In the title compound, C16H19Cl2N3O2, the dihedral angle between the two rings is 86.26 (2)°. The crystal packing is stabilized mainly by van der Waals interactions.
Key Engineering Materials, 2007
Acta Crystallographica Section E Structure Reports Online, 2008
Acta Crystallographica Section E Structure Reports Online, 2007
ABSTRACT In the title compound, C8H10N2O6S2, all bond lengths and angles are normal. The molecule... more ABSTRACT In the title compound, C8H10N2O6S2, all bond lengths and angles are normal. The molecules are packed into a three-dimensional network by intermolecular C-H center dot center dot center dot O hydrogen bonds and weak pi-pi aromatic stacking interactions [centroid separation = 4.078 (2) angstrom].
Oncotarget, Jan 16, 2016
The semaphorins were originally identified as having roles as guidance cues during neural develop... more The semaphorins were originally identified as having roles as guidance cues during neural development. Class 3 semaphorins are involved in cancer progression. However, the roles of class 3 semaphorins in hepatocellular carcinoma (HCC) are unknown. We examined the expression levels of class 3 semaphorins in HCC cell lines with different metastatic potential and in carcinoma tissue samples. The results indicated that Semaphorin 3A expression was up-regulated in metastatic cell lines and in samples from patients with tumor recurrence. Cell functional studies revealed that Semaphorin 3A promoted HCC cell proliferation, migration, and invasion. Animal studies indicated that Semaphorin 3A overexpression enhanced tumor growth and lung metastasis. Semaphorin 3A also acted as a chemoattractant involved in direct recruitment of macrophages in vitro, and facilitated tumor-associated macrophage (TAM) infiltration in vivo. Multivariate analysis revealed that Semaphorin 3A expression alone, or co...
Gastroenterology, Jan 25, 2016
Neutrophils can either promote or inhibit tumor progression, depending on the tumor microenvironm... more Neutrophils can either promote or inhibit tumor progression, depending on the tumor microenvironment, via release of cytokines. Neither the factors produced by tumor-associated neutrophils (TANs) nor their effects on tumor progression have been characterized. We investigated the roles of TANs in progression of hepatocellular carcinoma (HCC) using cell lines and immune cells isolated from patients. We performed studies with HepG2, PLC/PRF/5, MHCC97H and HCCLM3 human and Hepa1-6 and H22 mouse HCC cell lines; expression of chemokines and cytokines were knocked down with small hairpin RNAs. Cells were analyzed in chemotaxis assays and as growth as tumors in mice. HCC tissues and peripheral blood were collected from 20 patients undergoing curative resection or 20 healthy individuals (controls) in 2012 at Zhongshan Hospital in China. TANs and peripheral blood neutrophils (PBNs) were isolated and exposed to conditioned media from HCC cell lines; reverse transcription PCR was used to quanti...
Hepatology (Baltimore, Md.), Jan 11, 2016
MicroRNAs (miRNAs) play a critical role in the regulation of tumor metastasis. The role of these ... more MicroRNAs (miRNAs) play a critical role in the regulation of tumor metastasis. The role of these molecules in hepatocellular carcinoma (HCC), however, has not been fully elucidated. In this study, we employed miRNA-sequencing and identified 22 miRNAs involved in HCC metastasis. One of these, miR-28-5p, was downregulated in HCCs. This downregulation correlated with tumor metastasis, recurrence, and poor survival. Biofunctional investigations revealed that miR-28-5p deficiency promoted tumor growth and metastasis in nude mice without altering the in vitro biological characteristics of HCC cells. Through gene expression profiles and bioinformatics analysis, we identified interleukin-34 (IL-34) as a direct target of miR-28-5p, and the effects of miR-28-5p deficiency on HCC growth and metastasis was dependent on IL-34-mediated tumor-associated macrophage (TAMs) infiltration. Moreover, we found that TAMs induced by miR-28-5p-IL-34 signaling inhibit miR-28-5p expression on HCC cells via tr...
Microchimica Acta, 2014
ABSTRACT We report that a previously found fluorescent chemodosimeter for Hg(II) ions can also be... more ABSTRACT We report that a previously found fluorescent chemodosimeter for Hg(II) ions can also be used as a fluorescent probe for hypochlorous acid (HClO) in that its fluorescence intensity (excited at 520 nm and measured at 563 nm) is linearly proportional to the concentration of HClO in the 1-100 mu M range and with a 0.1 mu M detection limit. The probe can detect HClO with virtually no interference by Hg(II) and other metal ions. The mechanism for the high selectivity for HClO has been studied. The probe was applied to image hypochlorite in E. coli cells.
ChemistryOpen, 2015
The development of novel selective probes with high sensitivity for the detection of Al(3+) is wi... more The development of novel selective probes with high sensitivity for the detection of Al(3+) is widely considered an important research goal due to the importance of such probes in medicine, living systems and the environment. Here, we describe a new fluorescent probe, N'-(4-diethylamino-2-hydroxybenzylidene)-2-hydroxybenzohydrazide (1), for Al(3+). Probe 1 was evaluated in a solution of acetonitrile/water (1:1 v/v). Compared with previously reported probes for Al(3+), probe 1 can be synthesized easily and in high yield. A Job plot confirmed that probe 1 is able to complex Al(3+) in a 1:1 ratio, and the binding constant was determined to be 4.25×10(8) m(-1). Moreover, the detection limit was as low as 6.7×10(-9) m, suggesting that probe 1 has a high sensitivity. Common coexistent metal ions, such as K(+), Co(2+), Ca(2+), Ba(2+), Ni(2+), Pb(2+), Hg(2+), Ce(2+), Zn(2+), Cd(2+), Fe(3+), showed little or no interference in the detection of Al(3+) in solution, demonstrating the high s...
Advanced Materials Research, 2013
Advanced Materials Research, 2011
Advanced Materials Research, 2013
Advanced Materials Research, 2010
Cancer letters, Jan 28, 2015
Upregulation of CXCR2 in tumor cells has been documented in several types of cancer. As one of it... more Upregulation of CXCR2 in tumor cells has been documented in several types of cancer. As one of its ligands, CXCL5 is associated with neutrophil infiltration and poor prognosis in hepatocellular carcinoma (HCC). However, little is known about the role of the CXCR2/CXCL5 axis in the invasion and metastasis of HCC cells. In this study, we examined CXCR2 expression in human HCC cell lines and in three independent cohorts of HCC patients. The molecular effects of high expression levels of CXCR2 and CXCL5 in HCC cells were determined using qRT-PCR, western blot analysis, immunofluorescence, matrigel invasion assay, and xenograft mouse models. We found that high levels of CXCR2 correlated with progression and poor prognosis in human HCC. CXCR2/CXCL5 together promoted cell spreading by inducing the epithelial-mesenchymal transition (EMT) through activation of the PI3K/Akt/GSK-3β/Snail signaling pathway. In clinical HCC samples, high expression of both CXCR2 and CXCL5 showed a significant co...
Key Engineering Materials, 2013
ChemistryOpen, 2014
Recently, more and more rhodamine derivatives have been used as fluorophores to construct sensors... more Recently, more and more rhodamine derivatives have been used as fluorophores to construct sensors due to their excellent spectroscopic properties. A rhodamine-based fluorescent and colorimetric Fe(3+) chemosensor 3',6'-bis(ethylamino)-2-acetoxyl-2',7'-dimethyl-spiro[1H-isoindole-1,9'-[9H]xanthen]-3(2H)-one (RAE) was designed and synthesized. Upon the addition of Fe(3+), the dramatic enhancement of both fluorescence and absorbance intensity, as well as the color change of the solution, could be observed. The detection limit of RAE for Fe(3+) was around 7.98 ppb. Common coexistent metal ions showed little or no interference in the detection of Fe(3+). Moreover, the addition of CN(-) could quench the fluorescence of the acetonitrile solution of RAE and Fe(3+), indicating the regeneration of the chemosensor RAE. The robust nature of the sensor was shown by the detection of Fe(3+) even after repeated rounds of quenching. As iron is a ubiquitous metal in cells and plays vital roles in many biological processes, this chemosensor could be developed to have applications in biological studies.
Advanced Materials Research, 2013
Tetrahedron, 2005
The synthesis, structure and ring-closing metathesis (RCM) reactions of polyether bridged biscali... more The synthesis, structure and ring-closing metathesis (RCM) reactions of polyether bridged biscalix[4]arenes 6 in the partial cone conformation with upper rim allyl substituents are reported. The RCM reaction modes depend on the length of polyether chain. Diethylene glycolic chain produced the dimer 7a and linear oligomer 7a′ with multi-cavities, whereas triethylene and tetraethylene glycolic chains allowed direct cyclization through intramolecular head-to-tail pattern to yield novel bridged biscalix[4]arenes 7b–c.
Tetrahedron, 2006
Three sulfonamide-amide hybridized molecules and one cyclic analogue were synthesized and their a... more Three sulfonamide-amide hybridized molecules and one cyclic analogue were synthesized and their assembling behaviors in the solid state were investigated by X-ray crystallography. The results showed that the hybridized molecules could be not only induced to take up helical secondary structures by a network of intramolecular hydrogen bonds, but also utilized as useful building blocks for assembling into 1D zigzag chains and superhelices, 2D layers and further 3D networks. Moreover, it was found that the multiple C-H/O]S hydrogen bonds played an important role in the assembling processes. q