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Chen J, Lin M, Chen X, Cao Z, Tan Z, Xiong W, Tu Y, Yang J. A novel locus for primary focal hyperhidrosis mapped on chromosome 2q31.1. Br J Dermatol 2015; 172:1150-3. [PMID: 25195950 DOI: 10.1111/bjd.13383] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wu R, Song D, Cao Z, Li Y, Fang F, Zhang Y. 96 EFFECT OF MOF GENE ON PREIMPLANTATION DEVELOPMENT OF PIG PARTHENOGENETIC EMBRYOS. Reprod Fertil Dev 2015. [DOI: 10.1071/rdv27n1ab96] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The Mof gene (males absent on the first) is crucial to X-chromosome dosage compensation in the fly. It acts specifically to catalyse acetylation of histone H4 lysine 16 (H4K16ac) as one histone acetyltransferase of the MYST family, playing essential roles during mammalian development. However, little is known about Mof gene in pigs. The present study was designed to explore effects of Mof on pre-implantation development of pig parthenogenetic embryos obtained as reported by Cao et al. (2012 Zygote 20, 229–236). Immunofluorescent staining was performed to examine protein expression level of porcine Mof (pMof) and H4K16ac, and fluorescent intensity was measured by Image J software (NIH, Bethesda, MD, USA). Data are presented as mean ± standard error, and statistical analyses of the fluorescent intensity value, embryo development rate, and quality were performed using ANOVA with SPSS software (version 15.0, SPSS Inc., Chicago, IL, USA), and P-value <0.05 was considered significant. First, the coding sequence (CDS) of the pMof gene was cloned and the spatio-temporal expression patterns of the CDS were determined in pig oocytes, early embryos, and other tissues. A 1471-bp-long cDNA of pMof was obtained with 99.34% and 98.25% amino acid sequence homology and 92.88% and 88.96% nucleotide sequence homology to the human and mouse MOF homologues. We observed that pMof is expressed predominantly in oocytes and early embryos but at low levels in sperm and other organs. We found that pMof decreased from pronuclear to 8-cell stages and remained low until the blastocyst stage based on RT-qPCR results (n = 10 for each stage embryos). In contrast, pMof protein expression as examined by immunofluorescent staining (n = 15 for each stage embryos) remained high throughout the pre-implantation development period. After porcine embryonic genome activation, pMOF remained detectable in 4-cell (n = 10) and 8-cell (n = 10) embryos despite amanitin treatment for 24 h. Thus, the mRNA level of MOF was not decreased after transcription inhibition suggesting that MOF is a maternal gene. To assess functional significance, we examined the expression of H4K16ac, a target of pMof, and found that the level of H4K16ac was constantly low from pronuclear to morula stage, but increased dramatically in blastocysts. When we knocked down pMOF by cytoplasmic injection of siRNA into porcine MII oocytes, rate and cell number of blastocysts declined significantly [blastocyst rate: uninjected (n = 228) v. negative-siRNA (n = 220) v. MOF-siRNA (n = 230) = 65.8 ± 3.75% v. 57.5 ± 4.30% v. 46.3 ± 5.72%; cell numbers: uninjected v. negative-siRNA v. MOF-siRNA = 84.73 ± 5.25 v. 77 ± 5.50 v. 55.08 ± 6.56]. A marker for DNA double-strand breaks and repair, γ-H2AX, increased in parallel to more apoptotic cells. Knockdown of MOF reduced H4K16ac. Overall, pMof is highly conserved among human, mouse, and pig; pMof is essential to pre-implantational development of pig parthenogenetic embryos involved in regulating H4K16ac.Research was supported by NSFC (31272442).
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Jiang PR, Cao Z, Qiu ZL, Pan JW, Zhang N, Wu YF. Plasma levels of TNF-α and MMP-9 in patients with silicosis. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2015; 19:1716-1720. [PMID: 26004615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE Silicosis is usually recognized at later stages of the disease, and early biomarkers for silicosis will be useful for timely diagnosis. We aimed at examining plasma levels of TNF-α and MMP-9, and correlation between these, in patients with different stages of silicosis in order to test suitability of these inflammatory factors as early biomarkers for silicosis. PATIENTS AND METHODS TNF-α and MMP-9 were quantified by ELISA in plasma specimens from 30 healthy individuals (control group), 28 individuals exposed to silica dust but without clinical disease, and 30 patients with silicosis. RESULTS Plasma levels of TNF-α and MMP-9 were increased in individuals exposed to silica dust (p < 0.05 vs. control individuals) and were further elevated in patients with silicosis (p < 0.05 vs. control individuals and individuals exposed to silica dust). There was a significant correlation between plasma levels of TNF-α and MMP-9 both in individuals exposed to silica dust (r = 0.696, p < 0.01) and patients with silicosis (r = 0.768, p < 0.01). CONCLUSIONS Plasma levels of TNF-α and MMP-9 are increased prior to development of clinically recognized silicosis, suggesting that these biomarkers are involved in the onset and development of silicosis. Combined detection of TNF-α and MMP-9 may be useful for early diagnosis of silicosis.
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Almusallam A, Yang K, Cao Z, Zhu D, Tudor J, Beeby SP. Improving the dielectric and piezoelectric properties of screen-printed Low temperature PZT/polymer composite using cold isostatic pressing. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/1742-6596/557/1/012083] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Cao Z, Koukharenko E, Torah RN, Tudor J, Beeby SP. Flexible screen printed thick film thermoelectric generator with reduced material resistivity. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/1742-6596/557/1/012016] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Wang H, Cao Z. Anti-inflammatory Effects of (-)-Epicatechin in Lipopolysaccharide-Stimulated Raw 264.7 Macrophages. TROP J PHARM RES 2014. [DOI: 10.4314/tjpr.v13i9.6] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Cao Z, Zhang N, Lou T, Jin Y, Wu Y, Ye Z, Pan J. microRNA-183 down-regulates the expression of BKCaβ1 protein that is related to the severity of chronic obstructive pulmonary disease. Hippokratia 2014; 18:328-332. [PMID: 26052199 PMCID: PMC4453806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVES The aim of this study was to investigate the relationship between the expression of microRNA (miRNA)-183 and Ca(2+)-activated K(+) channels β1 subunit (BKCaβ1) in the lung tissues of patients with chronic obstructive pulmonary disease (COPD). METHODS Quantitative real-time polymerase chain reaction and Western blotting were used for detecting the expression of miRNA-183 and BKCaβ1 in the lung tissues from 45 COPD patients and 30 lung cancer patients without COPD. Possible miRNAs that target BKCaβ1 were forecasted by bioinformatics. The expression of these miRNAs in the peripheral blood of COPD patients was also examined. After transfecting vascular smooth muscle cells with pGCMV/EGFP/miR-183 plasmid, the expression of miRNA-183 and BKCaβ1 were detected by quantitative real-time polymerase chain reaction and Western blotting. RESULTS The expression of BKCaβ1 in the lung tissues of COPD patients was significantly lower than control. Western blotting data showed that the expression of BKCaβ1 protein in COPD group was significantly lower than control. After transfecting the vascular smooth muscle cells with pGCMV/EGFP/miR-183 plasmid, we found that the level of BKCaβ1 mRNA was not significantly reduced by the increase of miRNA-183 level, but the expression of BKCaβ1 protein was down-regulated. CONCLUSIONS The present study indicated that miRNA-183 might play a role in the expression of BKCaβ1, and the expression of miRNA-183 and BKCaβ1 were possibly related with the pathogenetic pathways of COPD. Hippokratia 2014; 18 (4): 328-332.
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Bartoli B, Bernardini P, Bi X, Bolognino I, Branchini P, Budano A, Camarri P, Cao Z, Cardarelli R, Catalanotti S, Cattaneo C, Chen S, Chen T, Creti P, Cui S, Dai B, D'Amone A, Danzengluobu, De Mitri I, D'Ettorre Piazzoli B, Di Girolamo T, Di Sciascio G, Feng C, Zhaoyang Feng, Zhenyong Feng, Giroletti E, Gou Q, Guo Y, He H, Haibing Hu, Hongbo Hu, Iacovacci M, Iuppa R, Jia H, Labaciren, Li H, Liguori G, Liu C, Liu J, Liu M, Lu H, Ma L, Ma X, Mancarella G, Mari S, Marsella G, Martello D, Mastroianni S, Montini P, Ning C, Panareo M, Perrone L, Pistilli P, Ruggieri F, Salvini P, Santonico R, Shen P, Sheng X, Shi F, Surdo A, Tan Y, Vallania P, Vernetto S, Vigorito C, Wang H, Wu C, Wu H, Xue L, Yang Q, Yang X, Yao Z, Yuan A, Zha M, Zhang H, Zhang L, Zhang X, Zhang Y, Zhao J, Zhaxiciren, Zhaxisangzhu, Zhou X, Zhu F, Zhu Q, Zizzi G. Radon contribution to single particle counts of the ARGO-YBJ detector. RADIAT MEAS 2014. [DOI: 10.1016/j.radmeas.2014.07.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Gong YL, Liao XD, Liang JB, Jahromi MF, Wang H, Cao Z, Wu YB. Saccharomyces cerevisiae Live Cells Decreased In vitro Methane Production in Intestinal Content of Pigs. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2014; 26:856-63. [PMID: 25049860 PMCID: PMC4093248 DOI: 10.5713/ajas.2012.12663] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Revised: 02/22/2013] [Accepted: 02/13/2013] [Indexed: 11/27/2022]
Abstract
An in vitro gas production technique was used in this study to elucidate the effect of two strains of active live yeast on methane (CH4) production in the large intestinal content of pigs to provide an insight to whether active live yeast could suppress CH4 production in the hindgut of pigs. Treatments used in this study include blank (no substrate and no live yeast cells), control (no live yeast cells) and yeast (YST) supplementation groups (supplemented with live yeast cells, YST1 or YST2). The yeast cultures contained 1.8×1010 cells per g, which were added at the rates of 0.2 mg and 0.4 mg per ml of the fermented inoculum. Large intestinal contents were collected from 2 Duroc×Landrace×Yorkshire pigs, mixed with a phosphate buffer (1:2), and incubated anaerobically at 39°C for 24 h using 500 mg substrate (dry matter (DM) basis). Total gas and CH4 production decreased (p<0.05) with supplementation of yeast. The methane production reduction potential (MRP) was calculated by assuming net methane concentration for the control as 100%. The MRP of yeast 2 was more than 25%. Compared with the control group, in vitro DM digestibility (IVDMD) and total volatile fatty acids (VFA) concentration increased (p<0.05) in 0.4 mg/ml YST1 and 0.2 mg/ml YST2 supplementation groups. Proportion of propionate, butyrate and valerate increased (p<0.05), but that of acetate decreased (p<0.05), which led to a decreased (p<0.05) acetate: propionate (A: P) ratio in the both YST2 treatments and the 0.4 mg/ml YST 1 supplementation groups. Hydrogen recovery decreased (p<0.05) with yeast supplementation. Quantity of methanogenic archaea per milliliter of inoculum decreased (p<0.05) with yeast supplementation after 24 h of incubation. Our results suggest that live yeast cells suppressed in vitro CH4 production when inoculated into the large intestinal contents of pigs and shifted the fermentation pattern to favor propionate production together with an increased population of acetogenic bacteria, both of which serve as a competitive pathway for the available H2 resulting in the reduction of methanogenic archaea.
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Cao Z, Lu R, Wang Q, Tessema N, Jiao Y, van den Boom HPA, Tangdiongga E, Koonen AMJ. Cyclic additional optical true time delay for microwave beam steering with spectral filtering. OPTICS LETTERS 2014; 39:3402-3405. [PMID: 24978496 DOI: 10.1364/ol.39.003402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Optical true time delay (OTTD) is an attractive way to realize microwave beam steering (MBS) due to its inherent features of broadband, low-loss, and compactness. In this Letter, we propose a novel OTTD approach named cyclic additional optical true time delay (CAO-TTD). It applies additional integer delays of the microwave carrier frequency to achieve spectral filtering but without disturbing the spatial filtering (beam steering). Based on such concept, a broadband MBS scheme for high-capacity wireless communication is proposed, which allows the tuning of both spectral filtering and spatial filtering. The experimental results match well with the theoretical analysis.
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Shang B, Gao A, Pan Y, Zhang G, Tu J, Zhou Y, Yang P, Cao Z, Wei Q, Ding Y, Zhang J, Zhao Y, Zhou Q. CT45A1 acts as a new proto-oncogene to trigger tumorigenesis and cancer metastasis. Cell Death Dis 2014; 5:e1285. [PMID: 24901056 PMCID: PMC4611718 DOI: 10.1038/cddis.2014.244] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Revised: 04/25/2014] [Accepted: 04/29/2014] [Indexed: 02/06/2023]
Abstract
Cancer/testis antigen (CTA)-45 family (CT45) belongs to a new family of genes in phylogenetics and is absent in normal tissues except for testis, but is aberrantly overexpressed in various cancer types. Whether CT45 and other CTAs act as proto-oncogenes has not been determined. Using breast cancer as a model, we found that CT45A1, a representative CT45 family member, alone had a weak tumorigenic effect. However, its neoplastic potency was greatly enhanced in the presence of growth factors. Overexpression of CT45A1 in breast cancer cells markedly upregulated various oncogenic and metastatic genes, constitutively activated ERK and CREB signaling pathways, promoted epithelial-mesenchymal transition, and increased cell stemness, tumorigenesis, invasion, and metastasis, whereas silencing CT45A1 significantly reduced cancer cell migration and invasion. We propose that CT45A1 functions as a novel proto-oncogene to trigger oncogenesis and metastasis. CT45A1 and other CT45 members are therefore excellent targets for anticancer drug discovery and targeted tumor therapy, and valuable genes in the study of a molecular phylogenetic tree.
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Oh CW, Huijskens FM, Cao Z, Tangdiongga E, Koonen AMJ. Toward multi-Gbps indoor optical wireless multicasting system employing passive diffractive optics. OPTICS LETTERS 2014; 39:2622-2625. [PMID: 24784061 DOI: 10.1364/ol.39.002622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This Letter presents the evaluation and demonstration of an optical free-space (FS) multicasting system for multi-Gigabits-per-second (multi-Gbps) indoor transmission. These simultaneous line-of-sight links are formed by infrared beams and are beam-steered using a passive diffraction grating. The experiment has resulted in error-free links (bit error rate <10(-9) at 2.5 Gbps on-off keying) and is scalable to support higher data rates. This system is proposed for short-range optical wireless communication and can be seamlessly integrated in in-building fiber networks.
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Nightingale KJ, Chinta SK, Agarwal P, Nemelivsky M, Frisina AC, Cao Z, Norman RG, Fisch GS, Corby P. Toothbrush efficacy for plaque removal. Int J Dent Hyg 2014; 12:251-6. [PMID: 24738786 DOI: 10.1111/idh.12081] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/04/2014] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To determine the effectiveness of a novel sonic toothbrush in reducing plaque and in maintenance of gingival health when compared to a standard manual brush. METHODS This study was a block-randomized, examiner-blind, two-treatment, parallel group, single centre clinical investigation. A total of 84 subjects were enrolled and randomly assigned to receive either the Panasonic EW-DL90 or an American Dental Association-endorsed manual toothbrush. Subjects were instructed to follow a twice-daily brushing regimen without flossing. Plaque levels and gingival health were assessed at baseline and after 1 and 3 weeks of treatment using the Turesky Modification of the Quigley-Hein Plaque Index and the Papillary Bleeding Score. RESULTS Subjects assigned to the EW-DL90 group had significantly lower plaque levels after 1 and 3 weeks of treatment than those in the manual group (P = 0.003 and 0.0035, respectively). Both groups showed a reduction in plaque levels at Week 3 relative to baseline. The EW-DL90 group had significantly lower gingival inflammation scores after 1 week of treatment (P = 0.0293), but there was no difference between groups after 3 weeks of treatment. CONCLUSION The EW-DL90 toothbrush safely and effectively removes more plaque than a standard manual toothbrush. Improvement in gingival inflammation was observed after 1 week of treatment. There was no difference in Papillary Bleeding Score between the two groups after 3 weeks of treatment. CLINICAL SIGNIFICANCE The newly developed sonic brush (Panasonic EW-DL90) tested in this study was found to be more effective than a manual toothbrush at plaque removal. The papillary bleeding scores were significantly lower in the sonic brush group after 1 week of product use. After 3 weeks of product use, both treatment groups had similar papillary bleeding scores almost returning to baseline values.
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Bartoli B, Bernardini P, Bi X, Bolognino I, Branchini P, Budano A, Calabrese Melcarne A, Camarri P, Cao Z, Cardarelli R, Catalanotti S, Chen S, Chen T, Chen Y, Creti P, Cui S, Dai B, D’Amone A, Danzengluobu, De Mitri I, D’Ettorre Piazzoli B, Di Girolamo T, Ding X, Di Sciascio G, Feng C, Feng Z, Feng Z, Gou Q, Guo Y, He H, Hu H, Hu H, Huang Q, Iacovacci M, Iuppa R, Jia H, Labaciren, Li H, Li J, Li X, Liguori G, Liu C, Liu C, Liu J, Liu M, Lu H, Ma X, Mancarella G, Mari S, Marsella G, Martello D, Mastroianni S, Montini P, Ning C, Panareo M, Panico B, Perrone L, Pistilli P, Ruggieri F, Salvini P, Santonico R, Sbano S, Shen P, Sheng X, Shi F, Surdo A, Tan Y, Vallania P, Vernetto S, Vigorito C, Wang B, Wang H, Wu C, Wu H, Xu B, Xue L, Yan Y, Yang Q, Yang X, Yao Z, Yuan A, Zha M, Zhang H, Zhang J, Zhang J, Zhang L, Zhang P, Zhang X, Zhang Y, Zhaxiciren, Zhaxisangzhu, Zhou X, Zhu F, Zhu Q, Zizzi G. Evidence of a geomagnetic effect on extensive air showers detected with the ARGO-YBJ experiment. Int J Clin Exp Med 2014. [DOI: 10.1103/physrevd.89.052005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Cao Z, Wang Q, Lu R, van den Boom HPA, Tangdiongga E, Koonen AMJ. Phase modulation parallel optical delay detector for microwave angle-of-arrival measurement with accuracy monitored. OPTICS LETTERS 2014; 39:1497-1500. [PMID: 24690822 DOI: 10.1364/ol.39.001497] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A novel phase modulation parallel optical delay detector is proposed for microwave angle-of-arrival measurement with accuracy monitored by using only one dual-electrode Mach-Zehnder modulator. A theoretical model is built up to analyze the proposed system including measurement accuracy monitoring. The spatial delay measurement is translated into the phase shift between two replicas of a microwave signal. Thanks to the accuracy monitoring, the phase shifts from 5° to 165° are measured with less than 3.1° measurement error.
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Shuang F, Hou SX, Zhao YT, Zhong HB, Xue C, Zhu JL, Bu GY, Cao Z. Characterization of an injectable chitosan-demineralized bone matrix hybrid for healing critical-size long-bone defects in a rabbit model. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2014; 18:740-752. [PMID: 24668718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND The effect of injectable demineralized bone matrix (DBM) on bone repair is not known. Here, we tested the hypothesis that injectable DBM can heal a critical-size diaphyseal radius defect in a rabbit model. MATERIALS AND METHODS The bone defect was filled with DBM powder, injectable DBM or powdered, freeze-dried powdered allografts. Radiological determination, gross evaluation, histology, and micro-computer tomography was carried out 4, 8, and 12 weeks after the surgery, respectively. RESULTS The injectable DBM group yielded better when compared with the freeze-dried powder group (p < 0.05). Moreover, biomechanical functionality was restored comparable to normal levels in the injectable DBM group. CONCLUSIONS The injectable DBM was as effective in structurally and functionally repairing bone defects as the DBM powder and more effective than the freeze-dried bone powder. Thus, our study supports the use of injectable DBM for bone healing.
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Hu X, Ye F, Cao Z, Ling H, Qiao F, Song C, Shao Z. Abstract P4-07-11: Dual characteristics of microRNA-484 modulated cytidine deaminase (CDA) axis in breast cancer: Chemo-resistance and regulating cell proliferation. Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p4-07-11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Acquired resistance to chemotherapy is a major clinical obstacle to achieve successful treatment in breast cancer. Cancer cells could evolve a complicated sensory network to develop resistance to chemo treatment. Recently, microRNAs modulated chemo-resistance is investigated as a new paradigm in cancer biology and some acquired mis-expression of miRs confer cancer cells to escape chemotherapy. However, it is important to address whether these miRs also play various intrinsic roles in carcinogenesis. Here, our study demonstrated that miR-484 could modulate cytidine deaminase (CDA) axis, playing various roles in chemo-resistance and cell proliferation.
We have generated a chemo-resistant breast cancer cell line (MDA-MB-231 Gem) which has 10 fold higher IC50 value than MDA-MB-231 cells in response to gemcitabine (dFdC) treatment through molecular evolution. Gene ontology analysis showed that cytidine degradation pathway was activated in the resistant cells, and qPCR array confirmed that cytidine deaminase (CDA), which converts dFdC to dFdU, was significantly upregulated. Interestingly, microRNA array analysis implicated that miR-484, which might target the 3’UTR region of CDA gene was down-regulated in these resistant cells. Furthermore, 3’UTR luciferase reporter assay and western blot revealed that miR-484 directly regulates CDA gene expression. Over-expression of miR-484 can sensibilize the resistant cells to dFdC treatment. Remarkably, restoration of CDA gene strongly converts miR-484–mediated dFdC sensibilization. These results implicated that miR-484/CDA axis play a pivotal role in chemo-resistance. Unexpectedly, further studies implicated that miR-484/CDA axis could also regulate cell proliferation due to disrupting cell cycle. We found that the chemo-resistant cells had deficiency in cell cycle progression at the S-phase transition, and miR-484 could significantly promote cell growth and overcome cell cycle arrest with CDA down-regulation. Moreover, reintroduction of CDA gene could abrogate miR-484-induced effects on cell proliferation via reactivating S-phase checkpoint. Importantly, the Kaplan-Meier survival analysis supported that higher expression of CDA in breast cancer patients indicates better outcome in DFS model.
In summary, this study uncovers for a previously unknown axis that cytidine deaminase was a direct downstream target for miR-484. The miR484/CDA axis could modulate cells into stagnant status for promoting cellular resistance to DNA damage agents in chemotherapy. On the other hand, as CDA gene participates in cell cycle S-phase arrest, miR484/CDA axis could also contribute to cell proliferation. Taken together, our findings provided new evidences that miR-484/CDA axis has various functions in cell proliferation and chemo-resistance and might be considered as a candidate therapeutic target in breast cancer.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P4-07-11.
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Li F, Cao Z, Yu J, Li X, Chen L. SSMI cancellation in direct-detection optical OFDM with novel half-cycled OFDM. OPTICS EXPRESS 2013; 21:28543-28549. [PMID: 24514366 DOI: 10.1364/oe.21.028543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Half-cycled DDO-OFDM transmission and reception was successfully demonstrated to resist SSMI without spectra efficiency reduction for the first time. The receiver sensitivity was improved by 2 and 1.5 dB in QPSK and 16QAM OFDM with 40-km SSMF-28 transmission, respectively.
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Cao Z, Gong Y, Liao X, Liang J, Yu B, Wu Y. Effect of dietary fiber on methane production in Chinese Lantang gilts. Livest Sci 2013. [DOI: 10.1016/j.livsci.2013.06.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yang M, Gong T, Lin X, Qi L, Guo Y, Cao Z, Shen M, Du Y. Maternal gene polymorphisms involved in folate metabolism and the risk of having a Down syndrome offspring: a meta-analysis. Mutagenesis 2013; 28:661-71. [DOI: 10.1093/mutage/get045] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Xue Y, Song X, Sun H, Cao Z. [Residues affecting hydrolysis of soy isoflavone glycosides, stability and catalytic properties of Thermotoga maritime β-glucosidase]. PRIKLADNAIA BIOKHIMIIA I MIKROBIOLOGIIA 2013; 49:457-66. [PMID: 25474868 DOI: 10.7868/s0555109913050152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The thermostable β-glucosidase A (TmBglA) from Thermotoga maritime is a promising biocatalyst for production of isoflavone aglycones. Use of enzymes with high specificity for soy isoflavone conjugates is however essential for efficient hydrolysis. The effect of the amino acids located in the aglycone binding pocket with non-conserved residues between specificity groups in family 1 glycoside hydrolase (GH1) was studied using wild-type TmBglA and 3 exchange mutants (MI-TmBglA, M2-TmBglA, M1M2-TmBglA). Three mutants were expressed in Escherichia coli, purified and characterized. They had shifts in both optimum tem- perature and thermal stability, and their narrowing pH-activity curve caused by removing the ionized side chain in mutation. All mutants demonstrated the decreased catalytic efficiency more effectively revealed with natural glycoside, salicin, than with artificial substrate, p-nitrophenyl-β-D-glucopyranoside, suggesting that' these amino acids are the key residues to determine aglycone specificity. A lower hydrolysis of genistin and daidzin for M2-TmBglA than M1-TmBglA indicated that L400, A407 and E408 being preferable to V170, A171, V173, G 174 and H180 residues of Tm-BglA could be essential for soy isoflavone glycoside binding and catalysis.
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Yuan Z, Yan T, Zheng W, Zuo C, Li H, Bian X, Zhang B, Li C, Cao Z, Xian L, Di Y, Liu F. Electrolytic partitioning of uranium and plutonium based on a new type of electrolytic mixer-settler. RADIOCHIM ACTA 2013. [DOI: 10.1524/ract.2013.2061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Summary
The design of a new type of electroreduction mixer-settler for the partitioning of uranium and plutonium during the Purex process, which is featured with E-shaped cathodes and U-shaped anodes in settling chamber, is described and the operational results achieved using this equipment are presented. The results show that this new type of mixer-settler has excellent separation performances. The flow rate of organic feed solution is 3 mL/min and the flow ratio of feed solution (1BF) to aqueous back extraction stream (1BX) and to organic wash stream (1BS) is 4/1/1. For an organic feed of 84 g/L uranium and 1.40 ⁓ 2.64 g/L plutonium, both the separation factor of plutonium from uranium and that of uranium from plutonium are apparently higher than 104
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Cho YS, Lee GY, Sajja HK, Qian W, Cao Z, He W, Karna P, Chen X, Mao H, Wang YA, Yang L. Targeted delivery of siRNA-generating DNA nanocassettes using multifunctional nanoparticles. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:1964-73. [PMID: 23292656 PMCID: PMC3674124 DOI: 10.1002/smll.201201973] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2012] [Revised: 10/30/2012] [Indexed: 05/23/2023]
Abstract
Molecular therapy using a small interfering RNA (siRNA) has shown promise in the development of novel therapeutics. Various formulations have been used for in vivo delivery of siRNAs. However, the stability of short double-stranded RNA molecules in the blood and efficiency of siRNA delivery into target organs or tissues following systemic administration have been the major issues that limit applications of siRNA in human patients. In this study, multifunctional siRNA delivery nanoparticles are developed that combine imaging capability of nanoparticles with urokinase plasminogen activator receptor-targeted delivery of siRNA expressing DNA nanocassettes. This theranostic nanoparticle platform consists of a nanoparticle conjugated with targeting ligands and double-stranded DNA nanocassettes containing a U6 promoter and a shRNA gene for in vivo siRNA expression. Targeted delivery and gene silencing efficiency of firefly luciferase siRNA nanogenerators are demonstrated in tumor cells and in animal tumor models. Delivery of survivin siRNA expressing nanocassettes into tumor cells induces apoptotic cell death and sensitizes cells to chemotherapy drugs. The ability of expression of siRNAs from multiple nanocassettes conjugated to a single nanoparticle following receptor-mediated internalization should enhance the therapeutic effect of the siRNA-mediated cancer therapy.
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Huang L, Han R, Ai T, Sun Z, Bai Y, Cao Z, Morelli JN, Xia L. Assessment of coronary microvascular dysfunction in hypertrophic cardiomyopathy: first-pass myocardial perfusion cardiovascular magnetic resonance imaging at 1.5 T. Clin Radiol 2013; 68:676-82. [PMID: 23566329 DOI: 10.1016/j.crad.2013.01.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Revised: 12/26/2012] [Accepted: 01/09/2013] [Indexed: 11/26/2022]
Abstract
AIM To evaluate the integrity of the coronary microvasculature in patients with hypertrophic cardiomyopathy (HCM) using first-pass magnetic resonance perfusion imaging. MATERIALS AND METHODS Twenty-two patients with HCM and 13 healthy volunteers underwent cardiac magnetic resonance imaging (CMR) at rest. Imaging protocols included short axis cine, first-pass myocardial perfusion, and late-phase contrast-enhanced imaging. Left ventricular end-diastolic wall thickness (EDTH), myocardial thickening, maximal upslope of time-intensity curve (slopemax), and late myocardial gadolinium enhancement (LGE) were assessed for each myocardial segment. The differences in slopemax, myocardial thickening, and EDTH between healthy volunteers and HCM patients were evaluated as were differences among hypertrophic segments of different severities (mild, moderate, and severe hypertrophy) in a one-way analysis of variance analysis. The differences in slopemax, myocardial thickening, and EDTH between the segments with and without LGE were compared by independent-sample t-test. A Pearson correlation test was used to determine the relationships between slopemax, EDTH, and myocardial thickening. RESULTS Slopemax was statistically significantly less in HCM patients; the degree of myocardial thickening was also significantly reduced (p < 0.001). Slopemax and the degree of thickening statistically significantly decreased with increasing degrees of myocardial hypertrophy (p < 0.05). Differences in slopemax, myocardial thickening, and EDTH were observed between segments with and without LGE (p < 0.05). Slopemax and myocardial thickening were negatively correlated with EDTH. CONCLUSION First-pass myocardial perfusion CMR with slopemax measurements demonstrates microvascular coronary dysfunction in patients with HCM, a determination that may aid in risk stratification, therapeutic planning, and determination of prognosis for HCM.
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Liu L, Li C, Xiang J, Dong W, Cao Z. Over-expression and potential role of cyclophilin A in human periodontitis. J Periodontal Res 2013; 48:615-22. [PMID: 23441725 DOI: 10.1111/jre.12047] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/09/2012] [Indexed: 12/01/2022]
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