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You Y, Yang CL, Zhang QQ, Wang MS, Ma XG, Liu WW. Ab initio studies on the spin-forbidden cooling transitions of the LiRb molecule. Phys Chem Chem Phys 2018; 18:19838-46. [PMID: 27388722 DOI: 10.1039/c6cp01618a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The spin-forbidden cooling of the LiRb molecule is investigated based on ab initio quantum chemistry calculations. The multireference configuration interaction method is used to generate the potential energy curves (PECs) of the ground state X(1)Σ(+) and the low-lying excited states a(3)Σ(+), B(1)Π, and b(3)Π. The spin-orbit coupling effects for the PECs and the transition dipole moments (TDMs) between the X(1)Σ(+), b(3)Π and a(3)Σ(+) states are also calculated. The analytical functions for the PECs are deduced. The rovibrational energy levels, the spectroscopic parameters and the Franck-Condon factors (FCF) are determined by solving the Schrödinger equation of nuclear movement with the obtained analytical functions. The b(3)Π0 ↔ X(1)Σ(+) and b(3)Π1 ↔ X(1)Σ(+) transitions have highly diagonal distributed FCFs and non-zero TDMs, demonstrating that the LiRb molecule could be a very promising candidate for laser cooling. Therefore, a three-cycle laser cooling scheme for the molecule has been proposed based on these two spin-forbidden transitions. Using the radiative lifetime and linewidth calculated from the obtained TDM functions, we present further analysis of the cooling of LiRb and the corresponding KRb molecule. The transition b(3)Π0 ↔ X(1)Σ(+) is found to be a practical transition to cool the LiRb molecule, and a sub-microkelvin cool temperature could be reached for the KRb molecule using a similar laser cooling scheme.
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Zhang QQ, Liu XF, Ma L, Wei YS, Wang ZY, Xu H, Zang SQ. Remoulding a MOF’s pores by auxiliary ligand introduction for stability improvement and highly selective CO2-capture. Chem Commun (Camb) 2018; 54:12029-12032. [DOI: 10.1039/c8cc06593d] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An auxiliary ligand was introduced as a girder to remould a flexible MOF’s pores and bring new pore functionality, allowing superior stability and highly selective CO2 capture.
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Wang Q, Lu ZW, Liu YH, Wang ML, Fu S, Zhang QQ, Zhao HZ, Zhang ZX, Xie ZY, Huang ZH, Yu HH, Zhou WJ, Gao XY. [Rapid analysis on phenolic compounds in Rheum palmatum based on UPLC-Q-TOF/MSE combined with diagnostic ions filter]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 2017; 42:1922-1931. [PMID: 29090552 DOI: 10.19540/j.cnki.cjcmm.20170317.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Indexed: 11/18/2022]
Abstract
Diagnostic ions filter method was used to rapidly detect and identify the phenolic compounds in Rheum palmatum based on ultra performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF/MSE). The representative authentic standards of phenolic compounds, including gallic acid, (+)-catechin, (-)-epicatechin, (-)-epicatechin-3-O-gallate and procyanidin B2, were subjected to analysis by UPLC-Q-TOF/MSE system with negative ion mode. Fragmentation patterns of each standard were summarized based on assigned fragment ions. The prominent product ions were selected as diagnostic ions. Subsequently, diagnostic ions filter was employed to rapidly recognize analogous skeletons. Combined with retention time, accurate mass, characteristic fragments and previous literature data, the structures of the filtered compounds were identified or tentatively characterized. A total 63 phenolic compounds (36 phenolic acid derivatives, 8 flavonoid derivatives and 19 tennis derivatives) in R. palmatum were identified, including 6 potential new compounds. The method of diagnostic ions filter could rapidly detect and identify phenolic compounds in R. palmatum This study provides a method for rapid detection of phenolic compounds in R. palmatum and is expected to complete the material basis of rhubarb.
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Zhang QQ, Ni XG, He S, Zhang YM, Dou LZ, Lai SQ, Wang GQ. [Risk factors and survival analysis for synchronous esophageal carcinoma in patients with hypopharyngeal carcinoma]. ZHONGHUA ER BI YAN HOU TOU JING WAI KE ZA ZHI = CHINESE JOURNAL OF OTORHINOLARYNGOLOGY HEAD AND NECK SURGERY 2017; 52:749-754. [PMID: 29050092 DOI: 10.3760/cma.j.issn.1673-0860.2017.10.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the risk factors and survival status of hypopharyngeal carcinoma with synchronous second primary carcinoma of the esophagus. Methods: One hundred and sixty patients with newly diagnosed hypopharyngeal carcinoma from January 2009 to December 2012 were retrospectively reviewed. The clinical data, tumor-related information and follow-up results were collected and analyzed. Results: Forty-three synchronous esophageal carcinomas (27%) were detected in 160 patients with hypopharyngeal carcinoma, and most patients (72%) were at an early stage. On univariate analysis, the median age of less than 55 years old (χ(2)=4.525, P=0.033), excessive alcohol consumption (χ(2)=6.942, P=0.008) and invasion site more than 3 anatomical regions (χ(2)=21.503, P=0.000) had a significant correlation with the occurrence of synchronous esophageal carcinomas. Multivariate analysis showed that excessive alcohol consumption (OR=4.787, P=0.029) and invasion site more than 3 anatomical regions (OR=14.391, P=0.000) were independent risk factors. The median survival time was 26 months in 43 patients with synchronous esophageal carcinomas, which was significantly lower than that (58 months) in patients without secondary primary esophageal carcinomas (χ(2)=11.981, P=0.001). Conclusions: There is a high incidence of synchronous esophageal carcinoma in hypopharyngeal carcinoma patients, affecting the prognosis of hypopharyngeal carcinoma. Surveillance for esophageal carcinomas in patients with hypopharyngeal carcinoma, especially in excessive alcohol drinkers, is warranted.
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Zhang QQ, Yang CL, Wang MS, Ma XG, Liu WW. Spectroscopic parameters of the low-lying electronic states and laser cooling feasibility of NH + cation and NH - anion. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 185:365-370. [PMID: 28601040 DOI: 10.1016/j.saa.2017.06.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 06/02/2017] [Indexed: 06/07/2023]
Abstract
The potential energy curves and transition dipole moments of 12Σ+, 22Σ+, 12Π and 22Π states of NH+ cation and NH- anion are calculated by using multi-reference configuration interaction method and large all-electron basis sets. Based on the obtained potential energy curves, the rotational and vibrational energy levels of the states are obtained by solving the Schrödinger equation of nuclear movement. The calculated spectroscopic parameters for NH+ cation and NH- anion are in good agreement with available theoretical and experimental results. The spin orbit coupling effect of the 2Π states for both NH+ cation and NH- anion are calculated. The feasibility of laser cooling of the two molecules is examined by using the results of the molecular structure and spectroscopy. The highly diagonal Franck-Condon factors for the 12Π (v″=0)↔12Σ+ (v'=0) transition of NH+ and NH- are 0.821 and 0.999, while the radiative lifetimes of the 12Σ+ (v'=0) state for the two molecules are 384ns and 52.4ns, respectively. The results indicate that NH+ cation and NH- anion are good candidate molecules for laser cooling. The cooling scheme via Sisyphus process for the NH+ cation and NH- anion are proposed in the paper. The laser wavelengths for the close cycles of the absorption and radiation are also determined. Unfortunately, the potential energy curve of the ground state of the neutral NH molecule shows that the auto-detachment of NH- anion is possible, implying the optical scheme of laser cooling for NH- anion is not easy to achieve in the experiment although it has larger Franck-Condon factor.
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Zhang QQ, Cui YH, Wang Y, Kou WZ, Cao F, Cao XJ, Miao ZH, Kang XH. [Mechanism of long non-coding RNA-metastasis associated lung adenocarcinoma transcript 1 induced invasion and metastasis of esophageal cancer cell EC-109]. ZHONGHUA ZHONG LIU ZA ZHI [CHINESE JOURNAL OF ONCOLOGY] 2017. [PMID: 28635228 DOI: 10.3760/cma.j.issn.0253-3766.2017.06.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the effect and mechanism of long non-coding RNA-metastasis associated lung adenocarcinoma transcript 1, (LncRNA-MALAT1) on invasion and metastasis of esophageal cancer cell EC-109. Methods: EC-109 cells were transfected with lentiviral vector carrying short hairpin RNA of MALAT1( shRNA-MALAT1) or a nonspecific shRNA control (shRNA-control). The expressions of MALAT1, microRNA-200a, ZEB1 and ZEB2 were detected by qRT-PCR. The effect of shRNA-MALAT1 on invasion of EC-109 cells was determined by transwell assay. The expressions of components of epithelial-msenchymal transition pathway in EC-109 cells were determined by immunofluorescence array and western blotting. The expression relationship between MALAT1 and miR-200a in EC-109 cells was detected by dual-luciferase reporter assay. Results: The result of qRT-PCR showed that the expressions levels of MALAT1, ZEB1 and ZEB2 in shRNA-MALAT1 group were 0.43±0.06, 0.64±0.04 and 0.51±0.04, respectively, significantly lower than 0.97±0.08, 1.06±0.07 and 0.98±0.05 in shRNA-control group and 1 in control group, respectively(all P<0.05). Transwell assay showed that the number of invaded cells in shRNA MALAT1 group was (96.81±10.43) per low-power field, markedly lower than that of (278.44±13.28) per low-power field in shRNA-control group (P<0.01). Immunofluorescence staining and Western blotting showed that MALAT1 downregulation significantly reduced the expressions of proteins related to EMT signal pathway in EC-109 cells.Dual luciferase reporter assay showed that compared to negative control, the activities of luciferase reporter in EC-109 cells co-transfected with pmirGLO-MALAT1-wt and miR-200a were significantly down-regulated. While co-transfected pmirGLO-MALAT1-mut with miR-200a mimics had no effect on the luciferase reporter activities of MALAT1. Conclusion: LncRNA MALAT1 functions as a competing endogenous RNA to regulate the expressions of ZEB1 and ZEB2 by sponging miR-200a and promotes invasion and migration of esophageal cancer cells through inducing epithelial-mesenchymal transition.
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Fu DJ, Zhao RH, Li JH, Yang JJ, Mao RW, Wu BW, Li P, Zi XL, Zhang QQ, Cai HJ, Zhang SY, Zhang YB, Liu HM. Molecular diversity of phenothiazines: design and synthesis of phenothiazine-dithiocarbamate hybrids as potential cell cycle blockers. Mol Divers 2017; 21:933-942. [PMID: 28785928 DOI: 10.1007/s11030-017-9773-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Accepted: 07/24/2017] [Indexed: 11/28/2022]
Abstract
Novel phenothiazine-dithiocarbamate analogues were designed by molecular hybridization strategy and synthesized and evaluated for their anticancer activity in vitro against three selected cancer cell lines (EC-109, MGC-803, and PC-3). The preliminary structure-activity relationship (SAR) for this phenothiazine-dithiocarbamate hybrids is explored. Among all analogues, 2-oxo-2-(10H-phenothiazin-10-yl)ethyl 4-ethylpiperazine-1-carbodithioate (8a) showed the most potent inhibitory activity with an [Formula: see text] value of [Formula: see text] against PC-3 cells. In addition, compound 8a could arrest the cell cycle at the G1 phase and regulate the expression of G1 checkpoint-related proteins, suggesting that phenothiazine-dithiocarbamate hybrids might be useful as cell cycle blockers.
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Zhou QQ, Chen SS, Zhang QQ, Liu PF, Fang HZ, Yang Y, Zhang LC. Cerebrospinal fluid-contacting nucleus mediates nociception via release of fractalkine. ACTA ACUST UNITED AC 2017; 50:e6275. [PMID: 28793053 PMCID: PMC5572843 DOI: 10.1590/1414-431x20176275] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 05/25/2017] [Indexed: 11/21/2022]
Abstract
Increasing evidence suggests that the cerebrospinal fluid-contacting nucleus (CSF-contacting nucleus) mediates the transduction and regulation of pain signals. However, the precise molecular mechanisms remain unclear. Studies show that release of fractalkine (FKN) from neurons plays a critical role in nerve injury-related pain. We tested the hypothesis that release of FKN from the CSF-contacting nucleus regulates neuropathic pain, in a chronic constriction injury rat model. The results show that FKN is expressed by neurons, via expression of its only receptor CX3CR1 in the microglia. The levels of soluble FKN (sFKN) were markedly upregulated along with the increase in FKN mRNA level in rats subjected to chronic constriction injury. In addition, injection of FKN-neutralizing antibody into the lateral ventricle alleviated neuropathic pain-related behavior followed by reduction in microglial activation in the CSF-contacting nucleus. The results indicate that inhibition of FKN release by the CSF-contacting nucleus may ameliorate neuropathic pain clinically.
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Fu DJ, Song J, Hou YH, Zhao RH, Li JH, Mao RW, Yang JJ, Li P, Zi XL, Li ZH, Zhang QQ, Wang FY, Zhang SY, Zhang YB, Liu HM. Discovery of 5,6-diaryl-1,2,4-triazines hybrids as potential apoptosis inducers. Eur J Med Chem 2017; 138:1076-1088. [PMID: 28763643 DOI: 10.1016/j.ejmech.2017.07.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 07/04/2017] [Accepted: 07/07/2017] [Indexed: 12/18/2022]
Abstract
A series of 5,6-diaryl-1,2,4-triazines hybrids bearing a 1,2,3-triazole linker were synthesized by molecular hybridization strategy and evaluated for antiproliferative activity against three selected cancer cell lines (MGC-803, EC-109 and PC-3). The first structure-activity relationship (SAR) for these 5,6-diaryl-1,2,4-triazines is explored in this report with evaluation of 15 variants of the structural class. Among these chemical derivatives, 3-(((1-(4-fluorobenzyl)-1H-1,2,3-triazol-4-yl)methyl)thio)-5,6-diphenyl-1,2,4-triazine (11E) showed the more potent inhibitory effect against three cell lines than 5-Fu. Cellular mechanism studies in MGC-803 cells elucidated 11E inhibited colony formation and arrested cell cycle at G2/M phase. Furthermore, compound 11E caused morphological changes, decreased mitochondrial membrane potential, and induced apoptosis through the apoptosis-related proteins in MGC-803 cells. It was the first time, to our knowledge, that 5,6-diaryl-1,2,4-triazines bearing a 1,2,3-triazole linker were used as potential apoptosis inducers.
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Zhang QQ, Yang CL, Wang MS, Ma XG, Liu WW. The low-lying electronic states and optical schemes for the laser cooling of the BH + and BH - ions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 182:130-135. [PMID: 28431311 DOI: 10.1016/j.saa.2017.04.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 04/07/2017] [Accepted: 04/08/2017] [Indexed: 06/07/2023]
Abstract
The potential energy curves and transition dipole moments for the 12Σ+, 22Σ+, 12Π and 22Π electronic states of the two molecules are calculated using multi-reference configuration interaction and the large basis sets aug-cc-pwCV5Z. Based on the obtained potential energy curves, the rotational and vibrational energy levels of the states are obtained by solving the Schrödinger equation of nuclear motion, and the spectroscopic parameters are then obtained by fitting the energy levels to Dunham series expansions. The spin-orbit coupling effect of the 2Π states for both the BH+ cation and BH- anion are calculated. Highly diagonally distributed Franck-Condon factors are determined for the 12Σ+ (v″=0)↔12Π (v'=0) transition, ƒ00 (BH+)=0.943, while the Franck-Condon factors for the 12Π (v″=0)↔12Σ+ (v'=0) transition is ƒ00 (BH-)=0.942. Moreover, the radiative lifetime of 38.2ns for the excited 12Π state of the BH+ and 91.8ns for the 12Σ+ state of the BH- are obtained, which are short enough for rapid laser cooling. A three-step optical scheme of the laser cooling is constructed for either the BH+ cation or the BH- anion.
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Liu PF, Fang HZ, Yang Y, Zhang QQ, Zhou QQ, Chen SS, Zhou F, Zhang LC. Activation of P2X3 receptors in the cerebrospinal fluid-contacting nucleus neurons reduces formalin-induced pain behavior via PAG in a rat model. Neuroscience 2017; 358:93-102. [PMID: 28673711 DOI: 10.1016/j.neuroscience.2017.06.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 06/08/2017] [Accepted: 06/21/2017] [Indexed: 12/12/2022]
Abstract
The cerebrospinal fluid (CSF)-contacting nucleus is implicated in the descending inhibitory pathway in pain processing, whereas the cellular and molecular mechanisms underpinning CSF-contacting nucleus regulating pain signals remains largely elusive. ATP is evidenced to inhibit pain transmission at supraspinal level by the mediation of the receptor P2X, wherein its subtype P2X3 is identified as the most potent. Our present experiment investigated the functionality of P2X3 receptors in CSF-contacting nucleus in the formalin-evoked inflammatory pain. Immunofluorescence and western blot revealed the expression of P2X3 receptors in the CSF-contacting nucleus and their upregulated expression subsequent to administration of formalin in rat model. ATP (a P2X3 receptor agonist, 100nmol/5µl) by intracerebroventricular (i.c.v.) administration ameliorated pain behaviors and enhanced c-Fos immunoreactivity in the neurons of the periaqueductal gray (PAG), both of which were discounted by pre-administration of A-317491 (a selective P2X3 receptor antagonist, 25nmol/5µl). After the CSF-contacting nucleus was ablated by cholera toxin subunit B-saporin, ATP failed to induce analgesia, with the c-Fos immunoreactivity in the PAG neurons remaining intact. Our results validated that P2X3 receptors in the CSF-contacting nucleus are pivotal in inflammatory pain processing via the activation of PAG neurons.
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Ni XG, Zhang QQ, Wang GQ. Classification of nasopharyngeal microvessels detected by narrow band imaging endoscopy and its role in the diagnosis of nasopharyngeal carcinoma. Acta Otolaryngol 2017; 137:546-553. [PMID: 27841051 DOI: 10.1080/00016489.2016.1253869] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
CONCLUSIONS The new NBI classification of nasopharyngeal mucosal microvessels was helpful in differential diagnosis for benign and malignant lesions of the nasopharyngeal region. NBI endoscopy facilitates the detection of superficial nasopharyngeal lesions and might enable early diagnoses of NPC. OBJECTIVES To propose a new microvessel diagnostic classification using narrow band imaging (NBI) endoscopy and to investigate the role of an NBI classification in the diagnosis of nasopharyngeal carcinoma (NPC). METHODS Between January 2009 and December 2010, a total of 290 patients with a suspected nasopharyngeal tumor were enrolled in this study. The NBI endoscopic system was used to examine the nasopharynx. Each lesion was observed by NBI endoscopy and judged according to the detailed morphologic findings of epithelial microvessels. The superficial microvessel patterns were classified into five types (types I-V). The diagnostic effectiveness of NBI for benign and malignant nasopharyngeal lesions was evaluated. RESULTS Approximately 93.5% (29/31) of lymphoid hyperplasia appeared as the type II microvessel pattern under NBI endoscopy, whereas 96.2% (51/53) of nasopharyngeal radiation-induced inflammation exhibited the type III or IV microvessel pattern. The characteristics of NPC under NBI endoscopy mainly appeared as a type V microvessel pattern (79.5%, 167/210), and the sensitivity, specificity, predictive value (PPV), and negative predictive value (NPV) of type V in the diagnosis of NPC were 79.5%, 91.3%, 96.0%, and 62.9%, respectively. NBI endoscopy could significantly improve the detection of superficial lesions (χ2 = 12.789, p = .000).
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Zhang JY, Zhao YL, Batueva MD, Luo D, Xing ZF, Zhang QQ, Liu XH. Redescription of Chloromyxum ellipticum Li & Nie, 1973 (Myxosporea: Chloromyxidae) infecting the gall bladder of grass carp Ctenopharyngodon idellus Valenciennes, 1844, supplemented by morphological and molecular characteristics. Parasitol Res 2017; 116:1479-1486. [PMID: 28324166 DOI: 10.1007/s00436-017-5424-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 03/08/2017] [Indexed: 11/27/2022]
Abstract
The traditional taxonomy of the genus Chloromyxum Mingazzini, 1890 has been intensively challenged to be paraphyletic by recent ribosomal DNA (rDNA)-based phylogenetic analysis. Undersampling to get rich sequence data to infer more scientific phylogenetic relationships makes scientists conservatively assign all non-marine elasmobranch-infecting species as Chloromyxum sensu lato. Although complex ridge pattern on the spore surface observed by scanning electron microscopy was thought to be critical for the identification of Chloromyxum species, insufficient data also prevent this ultrastructural data to be a valid taxonomic feature for this genus. It is especial for Chloromyxum species to be reported in China. Molecular and ultrastructural characteristics are yet available for all 22 Chloromyxum species recorded in China. During the investigation of the diversity of coelozoic fish myxosporeans, Chloromyxum ellipticum Li & Nie, 1973 was found to highly infect the gall bladder of Ctenopharyngodon idellus Valenciennes, 1844 in Poyang Lake watershed of Jiangxi province, Eastern China. Here, we redescribed it by the currently recommended holistic approach of combining morphological, ultrastructural, and molecular characteristics. Mature spores were found floating free in the gall bladder, but no plasmodium observed. Spores are typical freshwater teleost-infecting Chloromyxum species, spherical or subspherical in lateral view, measuring 7.7 ± 0.08 μm (6.9-9.1) in length, 6.3 ± 0.09 μm (5.6-7.6) in width, and 5.8 ± 0.20 μm (5.2-6.3) in thickness. Four pyriform polar capsules, located at the anterior end of the spores, were equal in size, 3.3 ± 0.06 μm (2.2-4.1) long and 2.1 ± 0.03 μm (1.7-2.5) wide. Polar filaments coiled with four to five turns. Two equal spore valves are symmetrical, with 10-16 surface extrasutural ridges per valve, aligned along the longitudinal axis. The obtained partial 18S rDNA of C. ellipticum did not match any sequences available in GenBank. Phylogenetic analysis showed that C. ellipticum clustered firstly with Chloromyxum legeri with robust nodal support and grouped then with urinary system of freshwater teleost-infecting Chloromyxum clade, rather than other gall bladder of freshwater teleost-infecting clade.
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Zhang QQ, Tang XW, Wang AJ, Xue SL, Tian XP, Wang TJ, Yin J, Wu DP. [1q21 abnormality associated with multiple primary malignant tumor: two cases report and literatures review]. ZHONGHUA XUE YE XUE ZA ZHI = ZHONGHUA XUEYEXUE ZAZHI 2017; 38:247-248. [PMID: 28395452 PMCID: PMC7348381 DOI: 10.3760/cma.j.issn.0253-2727.2017.03.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Indexed: 11/17/2022]
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Li PZ, Cao DD, Liu XB, Wang YJ, Yu HY, Li XJ, Zhang QQ, Wang XB. Karyotype analysis and ribosomal gene localization of spotted knifejaw Oplegnathus punctatus. GENETICS AND MOLECULAR RESEARCH 2016; 15:gmr-15-04-gmr.15049159. [PMID: 28081279 DOI: 10.4238/gmr15049159] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The spotted knifejaw, Oplegnathus punctatus, is an important aquaculture fish species in China. To better understand the chromosomal microstructure and the karyotypic origin of this species, cytogenetic analysis was performed using Giemsa staining to identify metaphase chromosomes, C-banding to detect C-positive heterochromatin, silver staining to identify the nucleolus organizer regions (Ag-NORs), and fluorescence in situ hybridization (FISH) for physical mapping of the major (18S rDNA) and minor (5S rDNA) ribosomal genes. The species showed a karyotype of 2n = 48 for females, composed of 2 submetacentric and 46 telocentric chromosomes, with a fundamental number (FN) = 50, while the karyotype of males was 2n = 47, composed of 1 exclusive large metacentric, 2 submetacentric, and 44 telocentric chromosomes, with FN = 50. These karyotype results suggest that O. punctatus might have an X1X1X2X2/X1X2Y multiple sex chromosome system. C-positive heterochromatin was distributed in the centromeres of all chromosomal pairs and in the terminal portions of some chromosomes. A single pair of Ag-positive NORs was found to be localized at the terminal regions of the short arms of the subtelocentric chromosome pair, which was supported by FISH of 18S rDNA. After FISH, 5S rDNA were located on the interstitial regions of the smallest telocentric chromosome pair. This study was the first to identify the karyotype of this species and will facilitate further research on karyotype evolution in the order Perciformes.
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Zhang QQ, Chen XM, Wang YF, Wang K, Wang CY. [Evaluation of 8 cases of bilateral vocal cord paralysis by the resection of posterior part of vocal cord and vocal process using PMOD]. ZHONGHUA ER BI YAN HOU TOU JING WAI KE ZA ZHI = CHINESE JOURNAL OF OTORHINOLARYNGOLOGY HEAD AND NECK SURGERY 2016; 51:939-940. [PMID: 27978886 DOI: 10.3760/cma.j.issn.1673-0860.2016.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
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Zhang ZH, Yang XS, Zhang QQ, Wang L, He MY, Chen Q, Huang XF. Structure-induced catalysis enhancement of Cu-amino catalysts for rapidly selective oxidation of sulfides in the presence of H2O2. RSC Adv 2016. [DOI: 10.1039/c6ra22393a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A Cu-amino coordination polymer promotes rapid sulfoxidation of benzyl phenyl sulfide toward the sulfoxide with high conversion and selectivity.
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Cai X, Li F, Zhang Q, Xu M, Qu Y, Wan X, Gao C, Lu L. Peritumoral ductular reaction is related to nuclear translocation of β-catenin in hepatocellular carcinoma. Biomed Pharmacother 2015; 76:11-6. [PMID: 26653544 DOI: 10.1016/j.biopha.2015.10.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 10/16/2015] [Indexed: 12/19/2022] Open
Abstract
Increased peritumoral ductular reaction (DR) is related to poor prognosis in hepatocellular carcinoma (HCC) but the mechanism is unclear. Nuclear translocation of β-catenin is correlated with HCC metastasis and recurrence. Thus, we aim to explore whether there is a relationship between peritumoral DR and tumoral nuclear translocation of β-catenin in HCC. Hepatitis B virus (HBV)-related HCC patients (n=120) were enrolled into this study from January 2003 to December 2007. Clinicopathological variables were collected and immunohistochemistry staining for cytokeratin 19 (CK19), proliferating cell nuclear antigen (PCNA), β-catenin, phosphorylated-Smad2 (PSmad2) and transforming growth factor-β1 (TGF-β1) were performed in tumor and/or peritumor liver tissues. Peritumoral DR is significantly correlated with local inflammation (P<0.001), fibrosis (P<0.001), tumor size (P=0.006) and CK19 expression in the tumor (P=0.005). More patients with peritumoral DR had nuclear accumulation of β-catenin than patients with mild peritumoral DR (37.50% vs. 14. 58%, P=0.011). HCCs in the obvious DR group had stronger expression of PSmad2 than that in the mild DR group, and patients with nuclear translocation of β-catenin also had higher PSmad2 expression. In conclusion, increased peritumoral DR is related to tumoral nuclear translocation of β-catenin in HCC and enhanced action of TGF-β1 signaling may be involved in this relationship.
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Wang SB, D'Arcy C, Yu YQ, Li B, Liu YW, Tao YC, Wu YH, Zhang QQ, Xu ZQ, Fu YL, Kou CG. Prevalence and patterns of multimorbidity in northeastern China: a cross-sectional study. Public Health 2015. [PMID: 26210070 DOI: 10.1016/j.puhe.2015.06.013] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVES Information on multimorbidity in the general populations of developing countries is lacking. We examine the prevalence and patterns of multimorbidity in northeastern China. STUDY DESIGN A cross-sectional study was conducted on adult residents in Jilin Province, northeastern China from June 2012 to August 2012. METHODS Data were collected from a large cross-sectional study (n = 21,435) of adult community residents in Jilin Province in northeastern China. Multimorbidity, or co-morbidity, was defined as having two or more of 18 specified prevalent chronic diseases. A range of demographics, socio-economic factors, other risk factors and general mental health were used in describing the distribution of multimorbidity and in exploring the associations between them. RESULTS Almost a quarter (24.7%) of the adults were found to be multimorbid for chronic diseases. Multimorbidity was more common among older adults, women, rural residents and those with low income. Smoking, increasing BMI and psychological distress were independently associated with multimorbidity. Multimorbid patients were frequent users of primary care. Most dyads of chronic diseases co-occurred more frequently than would be expected on the basis of chance. CONCLUSIONS Researchers, clinicians and policy makers need to pay special attention to the health care challenges of multimorbidity and develop effective intervention strategies and programs to reduce the burden of multimorbidity.
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95
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Wang TY, Zhang QQ, Zhang X, Sun QL, Zhao CP, Wang XY. The effect of recombinant lentiviral vector encoding miR-145 on human esophageal cancer cells. Tumour Biol 2015; 36:9733-8. [PMID: 26156802 DOI: 10.1007/s13277-015-3743-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 06/30/2015] [Indexed: 01/23/2023] Open
Abstract
miR-145, a newly identified microRNA molecule, is hypothesized to function as a tumor suppressor, but this activity has not been investigated in esophageal l carcinoma (EC). The aim of this study was to investigate the effect of miR-145 on the biological features of EC cells. miR-145 was obtained using PCR technology and cloned into the lentiviral vector, pLVX-IRES-ZsGreen1, to construct the resulting vector, pLVX-IZ-miR-145. The vector was packaged, the viral titer was tested, and ECA109 cells were infected with the optimal viral titer. Cells that were stably transfected with miR-145 were screened. Flow cytometry was used to analyze enhanced green fluorescence protein gene expression, and to measure cell apoptosis and cell cycle. miR-145 expression was detected by real-time fluorescent quantitative PCR. Furthermore, cell proliferation was assayed using CCK-8 assay. The pLVX-IZ-miR-145 vector was successfully constructed, and the viral titer achieved up to 5.0 × 10(8) TU/mL. The transfection efficiency was 90 %. Compared to the control group, the expression level of miR-145 in the transfected group was significantly higher (185-fold, P < 0.05). miR-145 overexpression significantly inhibited esophageal cancer cell proliferation (P < 0.05). Moreover, the number of cells at the G2/M stage, as well as the cell apoptotic rate, in the miR-145-transfected group was significantly increased (P < 0.05). Our study reveals that overexpression of miR-145 inhibits cell proliferation, increases apoptosis, and influences the cell cycle progression of EC cell.
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96
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Zhang QQ, Lu LG. Nonalcoholic Fatty Liver Disease: Dyslipidemia, Risk for Cardiovascular Complications, and Treatment Strategy. J Clin Transl Hepatol 2015; 3:78-84. [PMID: 26357637 PMCID: PMC4542078 DOI: 10.14218/jcth.2014.00037] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 12/15/2014] [Accepted: 12/22/2014] [Indexed: 12/11/2022] Open
Abstract
Studies have shown that nonalcoholic fatty liver disease (NAFLD) is strongly associated with several metabolic disorders and diseases, such as obesity, type 2 diabetes mellitus, and dyslipidemia. In NAFLD, dyslipidemia is manifested as increased serum triglyceride and low-density lipoprotein cholesterol levels and decreased high-density lipoprotein cholesterol levels, all of which are key risk factors for cardiovascular disease (CVD). CVD is a leading cause of mortality in NAFLD patients. Thus, implementation of an aggressive therapeutic strategy for dyslipidemia with hypolipidemic agents may mitigate the risk for CVD among NAFLD patients. Here, we provide a current review of literature regarding NAFLD, with particular emphasis on dyslipidemia and available treatment options.
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97
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Liu H, Zhang QD, Li ZH, Zhang QQ, Lu LG. Efficacy and safety of gemcitabine-based chemotherapies in biliary tract cancer: A meta-analysis. World J Gastroenterol 2014; 20:18001-18012. [PMID: 25548500 PMCID: PMC4273152 DOI: 10.3748/wjg.v20.i47.18001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2014] [Revised: 06/12/2014] [Accepted: 07/11/2014] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the efficacy and safety of gemcitabine (Gem)-based combination chemotherapies for the treatment of advanced biliary tract cancer.
METHODS: Clinical trials were identified by searching scientific literature databases (PubMed, EMBASE and the Cochrane Library) for studies published between 1975 and 2013. Two reviewers independently evaluated the relevant studies and manually searched references from these reports to locate additional eligible studies. The disease response and control rates, progression-free and overall survivals, and the grade 3-4 toxicities were evaluated by a meta-analysis. Odds-ratios (ORs) of the disease response and control rates and grade 3-4 toxicities, and the mean difference (MD) of both progression-free and overall survivals were calculated and used for statistical analysis.
RESULTS: Seven randomized trials with a total of 858 patients were selected and included in the final analysis. The studies were divided into subgroups based on the chemotherapy regimens, including Gem-based and non-Gem-based chemotherapies. The overall analyses revealed that the patients treated with Gem-based combination chemotherapy had significantly higher disease response rates [OR = 1.69, 95% confidence interval (CI): 1.17-2.43; P = 0.01], a longer progression-free survival (MD = 1.95, 95%CI: 0.90-3.00; P = 0.00) and a longer overall survival (MD = 1.85, 95%CI: 0.26-3.44; P = 0.02). A higher incidence of grade 3-4 hematological toxicities, including leukopenia (OR = 2.98, 95%CI: 1.44-6.20; P = 0.00), anemia (OR = 2.96, 95%CI: 1.79-4.92; P = 0.00) and neutropenia (OR = 2.80, 95%CI: 1.39-5.64; P = 0.00) was found in the Gem-based combination chemotherapy group compared with the Gem monotherapy and non-Gem-based chemotherapy groups.
CONCLUSION: Gem-based combination chemotherapy is a potential first-line treatment for advanced biliary tract cancer as a result of improved survival, though with additional toxicity.
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Zhang QQ, Xu MY, Qu Y, Hu JJ, Li ZH, Zhang QD, Lu LG. TET3 mediates the activation of human hepatic stellate cells via modulating the expression of long non-coding RNA HIF1A-AS1. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2014; 7:7744-7751. [PMID: 25550811 PMCID: PMC4270585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Accepted: 10/31/2014] [Indexed: 06/04/2023]
Abstract
Activated Hepatic stellate cells (HSCs) play a critical role in liver fibrosis and a lot of efforts have been made to dissect the underlying mechanism involved in activation of HSCs. However, the underlying mechanism remains douteux up to now. In the present study, we found that TET3, one member of ten-eleven translocation (TET) protein family, reduced significantly in HSCs LX-2 activated by TGF-β1. To study the function of TET3 in activation of HSCs, knockdown was performed by RNA interference. Results showed that cell proliferation rise significantly and cell apoptosis reduce obviously after knockdown of TET3. Meanwhile, IHC showed that the expression of α-SMA rise significantly compared to control. These results indicated that TET3 is closely associated with the activation of HSCs. Further studies found that long non-coding RNA HIF1A-AS1 was reduced significantly in LX-2 cell after treatment with siRNA for TET3. The result hinted that TET3 activate HSCs through modulating the expression of HIF1A-AS1. To confirm this hypothesis, RNA interference was performed to silence the HIF1A-AS1. Results showed that HIF1A-AS1 silencing lead to enhancing in cell proliferation and declining apoptosis. Taken together, TET3 can mediate the activation of HSCs via modulating the expression of the long non-coding RNA HIF1A-AS1.
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Zhou ZG, Yao QZ, Lei D, Zhang QQ, Zhang J. Investigations on the mechanisms of interactions between matrix metalloproteinase 9 and its flavonoid inhibitors using a combination of molecular docking, hybrid quantum mechanical/molecular mechanical calculations, and molecular dynamics simulations. CAN J CHEM 2014. [DOI: 10.1139/cjc-2014-0180] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Many experimental studies have found that flavonoids can inhibit the activities of matrix metalloproteinases (MMPs), but the relevant mechanisms are still unclear. In this paper, the interaction mechanisms of MMP-9 with its five flavonoid inhibitors are investigated using a combination of molecular docking, hybrid quantum mechanical and molecular mechanical (QM/MM) calculations, and molecular dynamics simulations. The molecular dynamics simulation results show a good linear correlation between the calculated binding free energies of QM/MM−Poisson–Boltzmann surface area (PBSA) and the experimental −log(EC50) regarding the studied five flavonoids on MMP-9 inhibition in explicit solvent. It is found that compared with the MM−PBSA method, the QM/MM−PBSA method can obviously improve the accuracy for the calculated binding free energies. The predicted binding modes of the five flavonoid−MMP-9 complexes reveal that the different hydrogen bond networks can form besides producing the Zn−O coordination bonds, which can reasonably explain previous experimental results. The agreement between our calculated results and the previous experimental facts indicates that the force field parameters used here are effective and reliable for investigating the systems of flavonoid−MMP-9 interactions, and thus, these simulations and analyses could be reproduced for the other related systems involving protein−ligand interactions. This paper may be helpful for designing the new MMP-9 inhibitors having higher biological activities by carrying out the structural modifications of flavonoid molecules.
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Xu MY, Hu JJ, Shen J, Wang ML, Zhang QQ, Qu Y, Lu LG. Stat3 signaling activation crosslinking of TGF-β1 in hepatic stellate cell exacerbates liver injury and fibrosis. Biochim Biophys Acta Mol Basis Dis 2014; 1842:2237-45. [PMID: 25092172 DOI: 10.1016/j.bbadis.2014.07.025] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2014] [Revised: 07/24/2014] [Accepted: 07/25/2014] [Indexed: 12/13/2022]
Abstract
BACKGROUND/AIMS The role of signal transducer and activator of transcription 3 (Stat3) in liver fibrosis is still controversial. Since hepatic stellate cells (HSCs) and transforming growth factor-β1 (TGF-β1) are central to the fibrogenesis, our goal was to clarify the mechanism of Stat3 crosslinking of TGF-β1 signaling. METHODS Stat3, TGF-β1 mRNA and protein expressions were examined in liver tissues of chronic hepatitis B (CHB) patients and diethylinitrosamine (DEN)-induced rat fibrosis model. The effect of Stat3 activation or suppression on TGF-β1 signaling in HSCs was tested in vitro and in vivo. RESULTS Stat3 expression as well as TGF-β1 was increased in CHB patients and DEN-induced fibrosis rat model. This was strongly correlated with increase in fibrosis staging. TGF-β1, a mediator of fibrosis, was enhanced by Stat3, but suppressed by siRNA-mediated RNA knockdown of Stat3 (siStat3) or Janus kinase 2 inhibitor (AG490) both in vivo and in vitro. Stat3 crosslinking TGF-β1 signaling plays an important role in HSC activation and increasing fibrosis related products. TGF-β1 could not achieve profibrogenic cytokine and anti-apoptosis characteristics without Stat3 activation in HSCs. CONCLUSION We provide a novel role of Stat3 cooperating TGF-β1 in activation and anti-apoptotic effect of HSCs. Stat3 worsens liver fibrosis through the up-regulation of TGF-β1 and fibrotic product expression.
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