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Wu C, Zou M, Xiong Y, Wang L, Chen H, Fan Y, Li C. Short- and long-term efficacy of focused ultrasound therapy for non-neoplastic epithelial disorders of the vulva. BJOG 2017; 124 Suppl 3:87-92. [PMID: 28856863 DOI: 10.1111/1471-0528.14747] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/10/2017] [Indexed: 11/29/2022]
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Li XY, Li XY, Kong M, Xu WW, Guo LR, Zou M, Su X, Dong XC, Zhou PH. [Etiology characteristics analysis of the first input human infection of avian influenza H7N9 in Tianjin]. ZHONGHUA YU FANG YI XUE ZA ZHI [CHINESE JOURNAL OF PREVENTIVE MEDICINE] 2017; 51:647-649. [PMID: 28693091 DOI: 10.3760/cma.j.issn.0253-9624.2017.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
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Lei DJ, Zhao G, Xie P, Li Y, Yuan H, Zou M, Niu JG, Ma XF. Analysis of genetic diversity of Leuciscus leuciscus baicalensis using novel microsatellite markers with cross-species transferability. GENETICS AND MOLECULAR RESEARCH 2017; 16:gmr-16-02-gmr.16029376. [PMID: 28481399 DOI: 10.4238/gmr16029376] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We used next-generation sequencing technology to characterize 19 genomic simple sequence repeat (SSR) markers and 11 expressed sequence tag (EST) SSR markers from Leuciscus leuciscus baicalensis, a small freshwater fish that is widely distributed in Xinjiang, China. Primers were used to test for polymorphisms in three L. leuciscus baicalensis populations in Xinjiang. There were 4-27 (average 11.3) alleles (NA), the expected heterozygosity (HE) was 0.36-0.94 (average 0.75 ± 0.14), the observed heterozygosity (HO) was 0.37-1.00 (average 0.68 ± 0.18), and the polymorphism information content (PIC) was 0.31-0.93 (average 0.71). The averages of HE and PIC for the EST-SSR markers were slightly lower than for the genomic SSR markers. Genetic analysis of the three populations showed similar results for PIC, HE, and NA. Amplifications were performed in nine other species; the top three transferability values were for Rutilus lacustris (80%), Leuciscus idus (76.7%), and Phoxinus ujmonensis (63.3%), with the following average values: PIC (0.56, 4.46, and 0.52); NA (0.40, 3.00, and 0.32); and HO (0.44, 2.74, and 0.22), respectively. L. leuciscus baicalensis is one of the most important commercial fish in Xinjiang, but in recent years, fishery resources have decreased sharply owing to water conservation projects, unreasonable utilization, and invasion by alien species. These novel SSR markers are appropriate for studies involving fingerprinting, gene flow, genetic diversity, population structure, and molecular-assisted breeding, and could contribute to the conservation of L. leuciscus baicalensis.
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Zou M, Bhatia A, Dong H, Jayaprakash P, Guo J, Sahu D, Hou Y, Tsen F, Tong C, O'Brien K, Situ AJ, Schmidt T, Chen M, Ying Q, Ulmer TS, Woodley DT, Li W. Evolutionarily conserved dual lysine motif determines the non-chaperone function of secreted Hsp90alpha in tumour progression. Oncogene 2017; 36:2160-2171. [PMID: 27721406 PMCID: PMC5386837 DOI: 10.1038/onc.2016.375] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 08/30/2016] [Accepted: 09/01/2016] [Indexed: 12/16/2022]
Abstract
Both intracellular and extracellular heat shock protein-90 (Hsp90) family proteins (α and β) have been shown to support tumour progression. The tumour-supporting activity of the intracellular Hsp90 is attributed to their N-terminal ATPase-driven chaperone function. What molecular entity determines the extracellular function of secreted Hsp90 and the distinction between Hsp90α and Hsp90β was unclear. Here we demonstrate that CRISPR/Case9 knocking out Hsp90α nullifies tumour cells' ability to migrate, invade and metastasize without affecting the cell survival and growth. Knocking out Hsp90β leads to tumour cell death. Extracellular supplementation with recombinant Hsp90α, but not Hsp90β, protein recovers tumourigenicity of the Hsp90α-knockout cells. Sequential mutagenesis identifies two evolutionarily conserved lysine residues, lys-270 and lys-277, in the Hsp90α subfamily that determine the extracellular Hsp90α function. Hsp90β subfamily lacks the dual lysine motif and the extracellular function. Substitutions of gly-262 and thr-269 in Hsp90β with lysines convert Hsp90β to a Hsp90α-like protein. Newly constructed monoclonal antibody, 1G6-D7, against the dual lysine region of secreted Hsp90α inhibits both de novo tumour formation and expansion of already formed tumours in mice. This study suggests an alternative therapeutic approach to target Hsp90 in cancer, that is, the tumour-secreted Hsp90α, instead of the intracellular Hsp90α and Hsp90β.
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Yu N, Reyes-Rivera I, Hipp J, Zou M, Pillai N, Hammerschmidt S. Real world treatment patterns and outcomes for mNSCLC patients receiving second and third-line therapy in Germany. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx091.052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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An T, Hao J, Sun S, Li R, Yang M, Cheng G, Zou M. Efficacy of statins for osteoporosis: a systematic review and meta-analysis. Osteoporos Int 2017; 28:47-57. [PMID: 27888285 DOI: 10.1007/s00198-016-3844-8] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Accepted: 11/14/2016] [Indexed: 12/14/2022]
Abstract
Our meta-analysis assessed the efficacy of statins on the risk of fracture, bone mineral density (BMD), and the markers of bone metabolism by collecting data from 33 clinical trials. We found that statin treatment was associated with bone metabolism. And statins seemed to be more effective on male patients with osteoporosis. The efficacy of statins for the treatment of osteoporosis has been controversial in previous studies and meta-analyses. Our meta-analysis was conducted to examine in detail the efficacy of statins on osteoporosis. We searched PubMed, Embase, and the Cochrane Library databases for clinical trials from inception to May 2016. We included studies that described the effect of statins on the risk of fracture, BMD, or bone turnover markers. Moreover, we also conducted subgroup analyses according to the skeleton site, patient gender, and length of follow-up. A total of 33 studies which included 23 observational studies (16 cohort studies and 7 case-control studies) and 10 randomized controlled trials (RCTs) were evaluated. These 33 studies included 314,473 patients in statin group and 1,349,192 patients in control group. Statins decreased the risk of overall fractures (OR = 0.81, 95% CI 0.73-0.89) and hip fractures (OR = 0.75, 95% CI 0.60-0.92). Furthermore, the use of statins was associated with increased BMD at the total hip (standardized mean difference (SMD) = 0.18, 95% CI 0.00-0.36) and lumbar spine (SMD = 0.20, 95% CI 0.07-0.32) and improved the bone formation marker, osteocalcin (OC) (SMD = 0.21, 95% CI 0.00-0.42). However, there was no positive effect on vertebral fractures, upper extremity fractures, BMD at the femoral neck, bone-specific alkaline phosphatase (BALP), and serum C-terminal peptide of type I collagen (S-CTX). Also, compared with male subgroups, the effect on female subgroups was only slightly positive or of no statistical significance. Our meta-analysis indicates that statin treatment may be associated with a decreased risk of overall fractures and hip fractures, an increased BMD at the total hip, BMD at the lumbar spine, and OC. Moreover, our results also show that statin treatment may have a greater effect on male patients than on female patients.
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Hu W, Zhao J, Gong C, Zou M, Yuan JH, Liu XY. [A comparation of efficacy between unilateral laminectomy approach bilateral decompression and traditional total laminectomy decompression in the treatment of lumbar spinal stenosis]. ZHONGHUA YI XUE ZA ZHI 2016; 96:1673-6. [PMID: 27290708 DOI: 10.3760/cma.j.issn.0376-2491.2016.21.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVES To compare the efficacy between unilateral laminectomy approach bilateral decompression and traditional total laminectomy decompression in the treatment of graft bone fusion and internal fixation for degenerative lumbar spinal stenosis with the unilateral symptoms. METHOD From January 2013 to December 2014, a total of 40 patients with unilateral symptoms of lumbar spinal stenosis were treated in Department of Spinal Surgery Bozhou People's Hospital of Anhui Province. Twenty patients(group A ) were treated by severe symptoms unilateral facetectomy and resection of superior articular and laminectomy and lateral recess decompression, interbody fusion, pedicle screw fixation.Twenty patients(group B ) were treated by total laminectomy interbody fusion and pedicle screw fixation.The time of operation, blood loss of the two groups were recorded.At the same time the visual analog scale (VAS), Oswestry disability index(ODI), Japanese Orthopaedic Association Scores(JOA) before and after operation (3, 6 , 12months) were recorded retrospectively. The effect of surgery were evaluated and compared. RESULT The VAS, JOA, and ODI of group A preoperation is respectively have no significant differences with the group B (P>0.05). The operation time, blood loss in operation of group A was respectively(133.2±25.3) min, (415.0±42.1) ml, significant differences with the group B[(491.0±46.3)ml; (156.2±28.5) min, P<0.05)]. The VAS, JOA, ODI of group A had no significant differences with the group B (P>0.05) at 3, 6 months after operation.The VAS, JOA, ODI of group A was respectively (3.0±0.6), (25.3±5.1), (16.5±1.5)scores, had significant differences with the group B and preoperation (P<0.05) at 12 months after operation. The radiographic data showed that the interbody fusion rate of group A was 100%, and group B was 95%, had significant differences by statistical analysis (P<0.05) at 12 months afer operation. CONCLUSION The improved unilateral laminectomy approach and bilateral decompression have less operation time and blood loss, more satisfactory for the lumbar spinal stenosis patients with the unilateral severe symptoms, the other side moderate stenosis and mild symptoms.The efficacy of lumbar stability and bilateral decompression is better by operation of improved unilateral approach.
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Yan Q, Zhou M, Zou M, Liu WE. Hypervirulent Klebsiella pneumoniae induced ventilator-associated pneumonia in mechanically ventilated patients in China. Eur J Clin Microbiol Infect Dis 2016; 35:387-96. [PMID: 26753990 DOI: 10.1007/s10096-015-2551-2] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 12/07/2015] [Indexed: 12/25/2022]
Abstract
The purpose of this study was to investigate the clinical characteristics of hypervirulent K. pneumoniae (hvKP) induced ventilator-associated pneumonia (VAP) and the microbiological characteristics and epidemiology of the hvKP strains. A retrospective study of 49 mechanically ventilated patients with K. pneumoniae induced VAP was conducted at a university hospital in China from January 2014 to December 2014. Clinical characteristics and K. pneumoniae antimicrobial susceptibility and biofilm formation were analyzed. Genes of capsular serotypes K1, K2, K5, K20, K54 and K57 and virulence factors plasmid rmpA(p-rmpA), iroB, iucA, mrkD, entB, iutA, ybtS, kfu and allS were also evaluated. Multilocus sequence typing (MLST) and random amplified polymorphic DNA (RAPD) analyses were used to study the clonal relationship of the K. pneumoniae strains. Strains possessed p-rmpA and iroB and iucA were defined as hvKP. Of 49 patients, 14 patients (28.6 %) were infected by hvKP. Antimicrobial resistant rate was significantly higher in cKP than that in hvKP. One ST29 K54 extended-spectrum-beta-lactamase (ESBL) producing hvKP strain was detected. The prevalence of K1 and K2 in hvKP was 42.9 % and 21.4 %, respectively. The incidences of K1, K2, K20, p-rmpA, iroB, iucA, iutA, Kfu and alls were significantly higher in hvKP than those in cKP. ST23 was dominant among hvKP strains, and all the ST23 strains had identical RAPD pattern. hvKP has become a common pathogen of VAP in mechanically ventilated patients in China. Clinicians should increase awareness of hvKP induced VAP and enhance epidemiologic surveillance.
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Krout D, Dahal R, Pramod A, Sharma B, Foster J, Boateng C, Cha J, Cao J, Zou M, Newman A, Lever J, Vaughan R, Henry L. Cocaine Photo‐affinity Analogs Bind in the S1 Binding Pocket of the Dopamine Transporter Providing a Mechanism for Competitive Inhibition of Dopamine Uptake. FASEB J 2015. [DOI: 10.1096/fasebj.29.1_supplement.768.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Xiao WM, Zhao MC, Zou M, Tan YD, Zhang XG. Differences in differential gene expression between young and mature Arabidopsis C58 tumours. PLANT BIOLOGY (STUTTGART, GERMANY) 2014; 16:539-549. [PMID: 24119138 DOI: 10.1111/plb.12092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Accepted: 07/06/2013] [Indexed: 06/02/2023]
Abstract
Tumorigenesis of plants triggered by Agrobacterium tumefaciens has been investigated for over a century, but a global study on changes in gene expression in plant tumours during growth and development has received little attention so far due to technical difficulties. Recently a great advance in 'omic' technologies, e.g. microarray, proteome and transcriptome analyses, has allowed differential expression profiling of genes for metabolic regulation during plant tumour growth and development. Deeken et al.(The Plant Cell Online, 18, 3617) and Lee C.-W. et al.(The Plant Cell Online, 21, 2948) used a fold change approach to profile genes differentially expressed (DE) between Arabidopsis inflorescence stalks infected with Agrobacterium strains C58 (carrying T-DNA) or GV3101 (without T-DNA) and control stalks at 3 hours, 6 days and 35 days after inoculation. We utilised ranking analysis of microarray data, a modified t-test approach, to further analyse these microarray data and compared DE gene functioning in photosynthesis, energy, nucleotide, RNA, DNA, protein and lipid metabolism, biological defence, cell wall and signalling pathways in young (6-day-old) and mature (35-day-old) tumours. There were large differences in differential expression of genes for these basic metabolic pathways between young and mature tumours. In young tumours, more genes were up-regulated in most metabolic functional categories than down-regulated, whereas in mature tumours, genes involved in basic and major metabolic pathways were more down-regulated than up-regulated, strongly indicating that relative to the control stalk, many metabolic pathways were enhance in young tumours but decayed or tended to be decayed in mature tumours.
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Zou M, Guo G, Zhao Y, Zhang Q. Detection, quantifications, and pharmacokinetics of ponazuril in healthy swine. J Vet Pharmacol Ther 2014; 37:598-602. [DOI: 10.1111/jvp.12126] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Accepted: 02/26/2014] [Indexed: 11/29/2022]
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Lu X, An H, Jin R, Zou M, Guo Y, Su PF, Liu D, Shyr Y, Yarbrough WG. PPM1A is a RelA phosphatase with tumor suppressor-like activity. Oncogene 2013; 33:2918-27. [PMID: 23812431 DOI: 10.1038/onc.2013.246] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Revised: 05/06/2013] [Accepted: 05/20/2013] [Indexed: 12/28/2022]
Abstract
Nuclear factor-κB (NF-κB) signaling contributes to human disease processes, notably inflammatory diseases and cancer. NF-κB has a role in tumorigenesis and tumor growth, as well as promotion of metastases. Mechanisms responsible for abnormal NF-κB activation are not fully elucidated; however, RelA phosphorylation, particularly at serine residues S536 and S276, is critical for RelA function. Kinases that phosphorylate RelA promote oncogenic behaviors, suggesting that phosphatases targeting RelA could have tumor-inhibiting activities; however, few RelA phosphatases have been identified. Here, we identified tumor inhibitory and RelA phosphatase activities of the protein phosphatase 2C (PP2C) phosphatase family member, PPM1A. We show that PPM1A directly dephosphorylated RelA at residues S536 and S276 and selectively inhibited NF-κB transcriptional activity, resulting in decreased expression of monocyte chemotactic protein-1/chemokine (C-C motif) ligand 2 and interleukin-6, cytokines implicated in cancer metastasis. PPM1A depletion enhanced NF-κB-dependent cell invasion, whereas PPM1A expression inhibited invasion. Analyses of human expression data revealed that metastatic prostate cancer deposits had lower PPM1A expression compared with primary tumors without distant metastases. A hematogenous metastasis mouse model revealed that PPM1A expression inhibited bony metastases of prostate cancer cells after vascular injection. In summary, our findings suggest that PPM1A is a RelA phosphatase that regulates NF-κB activity and that PPM1A has tumor suppressor-like activity. Our analyses also suggest that PPM1A inhibits prostate cancer metastases and as neither gene deletions nor inactivating mutations of PPM1A have been described, increasing PPM1A activity in tumors represents a potential therapeutic strategy to inhibit NF-κB signaling or bony metastases in human cancer.
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Thakur S, Brake J, Keelara S, Zou M, Susick E. Farm and environmental distribution of Campylobacter and Salmonella in broiler flocks. Res Vet Sci 2013; 94:33-42. [DOI: 10.1016/j.rvsc.2012.07.014] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2012] [Revised: 05/18/2012] [Accepted: 07/07/2012] [Indexed: 11/16/2022]
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Cekanova M, Woraratphoka J, Sukhthankar M, Dharmawardhana S, Siriwardana N, Moustaid-Moussa N, Strom A, Baek SJ, Wong Q, Zou M, Donnell R, Wimalasena J. Abstract 4591: Estrogen receptor beta controls a wide variety of functions in breast cancer cells. Cancer Res 2010. [DOI: 10.1158/1538-7445.am10-4591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
The role of ER alpha as the mediator of estrogen action in breast cancer (BC) cells is well known, however, the role of ER beta is controversial. The majority of BC expressing ER alpha also express ER beta. Some clinical studies suggest that ER beta expression is a good prognosticator; however, in others, especially where expression levels of ER beta > ER alpha, ER beta may be associated with more advanced BC. Previously, we showed that ER beta may regulate a number of signaling pathways (AACR, 2008). Our recent work demonstrates that ER beta has even wider actions in MCF7 and T47D cells stably overexpressing ER beta. Thus, ER beta decreased phospho (p)/ total Stat1, p Stat3, p Stat5/total Stat5. Expression of the oncogenic miR cluster 17-92 was highly reduced (p<0.01) when ER beta overexpressing vs. control cells were compared. ER beta also decreased PPAR gamma, superoxide dismutase, as well as the concentration of the mRNA processing factor, RBM5, and the activated form of AMPK. All these changes were significant (p<0.05) in triplicate measurements. While ER beta overexpression increased migration through Matrigel, it significantly decreased CXCR4 expression (p<0.05, n=4). All of these effects of ER beta were estrogen-independent. On the other hand, estrogen increased CXCR4 expression in MCF7 cells significantly. In our study, we analyzed the expression of ER beta and BAD using tissue microarrays with normal and neoplastic breast tissue. Our immunohistochemical (IHC) data revealed a significant increase of ER beta cytoplasmic staining in neoplastic cells compared to normal cells (p<0.001). In addition, the nuclear expression of ER beta was significantly decreased in neoplastic cells compared to normal cells (p<0.01). From our correlation analysis of IHC data obtained from tissue microarray, we identified that cytoplasmic expression of BAD was negatively correlated with cytoplasmic expression of ER beta. In addition, the nuclear expression of BAD was significantly positively correlated with nuclear ER beta.
These results suggest that ER beta has a wide variety of actions in BC cells, as predicted by the regulation of 62 miRs (p<0.01) as determined by Exiqon Inc. Taken together our results suggest that ER beta may have a multitude of actions in breast cancer and that the ratio of ER alpha/beta may determine the prognostic outcome.
Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 101st Annual Meeting of the American Association for Cancer Research; 2010 Apr 17-21; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2010;70(8 Suppl):Abstract nr 4591.
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Purchas R, Zou M. Composition and quality differences between the longissimus and infraspinatus muscles for several groups of pasture-finished cattle. Meat Sci 2008; 80:470-9. [DOI: 10.1016/j.meatsci.2008.01.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2007] [Revised: 01/17/2008] [Accepted: 01/21/2008] [Indexed: 11/27/2022]
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Wang H, Zou M, Larson PR, Sanchez ES, Hobbs KL, Curtis ME, Johnson MB, Awitor OK. Nanomechanical properties of a Ni nanodot-patterned surface. NANOTECHNOLOGY 2008; 19:295708. [PMID: 21730613 DOI: 10.1088/0957-4484/19/29/295708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Nanomechanical properties of a Ni nanodot-patterned surface (NDPS) on a Si substrate were investigated using nanoindentation. The Ni NDPS was fabricated by thermal evaporation of Ni through a porous anodized aluminum oxide template onto a Si substrate. Plan-view transmission electron microscopy and nanobeam diffraction were used to characterize the Ni nanodot crystal structure. Scanning electron microscopy and atomic force microscopy were used to characterize the morphology and deformation of the Ni nanodots before and after nanoindentation. The elastic modulus and hardness of the Ni nanodots were found to be 159 ± 22 and 7.7 ± 1.0 GPa, respectively. The critical shear stress for initiating plastic deformation in the Ni nanodot was estimated to be 8.3 ± 1.0 GPa, which is close to the theoretical shear strength of 7.6 GPa in dislocation-free single crystal Ni.
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Morel PCH, Janz JAM, Zou M, Purchas RW, Hendriks WH, Wilkinson BHP. The influence of diets supplemented with conjugated linoleic acid, selenium, and vitamin E, with or without animal protein, on the composition of pork from female pigs1. J Anim Sci 2008; 86:1145-55. [DOI: 10.2527/jas.2007-0358] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Shi Y, Zou M, Baitei EY, Alzahrani AS, Parhar RS, Al-Makhalafi Z, Al-Mohanna FA. Cannabinoid 2 receptor induction by IL-12 and its potential as a therapeutic target for the treatment of anaplastic thyroid carcinoma. Cancer Gene Ther 2007; 15:101-7. [PMID: 18197164 DOI: 10.1038/sj.cgt.7701101] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Anaplastic thyroid carcinoma is the most aggressive type of thyroid malignancies. Previously, we demonstrated that tumorigenicity of anaplastic thyroid carcinoma cell line ARO was significantly reduced following interleukin (IL)-12 gene transfer. We suspected that tumor target structure in ARO/IL-12 cells might be changed and such a change may make them more susceptible to be killed through mechanisms apart from natural killer-dependent pathway. To identify genes involved, we examined gene expression profile of ARO and ARO/IL-12 by microarray analysis of 3757 genes. The most highly expressed gene was cannabinoid receptor 2 (CB2), which was expressed eightfold higher in ARO/IL-12 cells than ARO cells. CB2 agonist JWH133 and mixed CB1/CB2 agonist WIN-55,212-2 could induce significantly higher rate of apoptosis in ARO/IL-12 than ARO cells. Similar results were obtained when ARO cells were transfected with CB2 transgene (ARO/CB2). A considerable regression of thyroid tumors generated by inoculation of ARO/CB2 cells was observed in nude mice following local administration of JWH133. We also demonstrated significant increase in the induction of apoptosis in ARO/IL12 and ARO/CB2 cells following incubation with 15 nM paclitaxel, indicating that tumor cells were sensitized to chemotherapy. These data suggest that CB2 overexpression may contribute to the regression of human anaplastic thyroid tumor in nude mice following IL-12 gene transfer. Given that cannabinoids have shown antitumor effects in many types of cancer models, CB2 may be a viable therapeutic target for the treatment of anaplastic thyroid carcinoma.
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Abu-Amero KK, Alzahrani AS, Zou M, Shi Y. Association of mitochondrial DNA transversion mutations with familial medullary thyroid carcinoma/multiple endocrine neoplasia type 2 syndrome. Oncogene 2006; 25:677-84. [PMID: 16205644 DOI: 10.1038/sj.onc.1209094] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Medullary thyroid carcinoma (MTC) is a malignant tumour of the calcitonin-secreting parafollicular C cells of the thyroid, and occurs sporadically or as a component of the multiple endocrine neoplasia (MEN) type 2/familial medullary thyroid carcinoma (FMTC) syndromes. In the present study, we investigated the frequency of mtDNA mutations in 26 MTC tumour specimens (13 sporadic and 13 familial MTC) and their matched normal tissues by sequencing the entire coding regions of mitochondrial genome. Nonsynonymous mutations were detected in 20 MTC samples (76.9%): nine out of 13 sporadic MTC (69.2%) and 11 out of 13 (84.6%) familial MTC/MEN2. Both transition and transversion types of mutations were found in the samples. Interestingly, 76.2% (16/21) of transversion mutations were found in FMTC/MEN2 patients, whereas 66.7% (12/18) of transition mutations were in sporadic MTC. Synonymous mutations were found in 12 MTC samples. In total, we identified 27 transversion mutations (21 nonsynonymous and six synonymous) in MTC. Of them, 22 (81.5%) were from FMTC/MEN2, and five (18.5%) were from sporadic MTC. The association of transversion mutation with familial MTC/MEN2 was statistically significant (P = 0.0015, binomial test). Majority of the mutations were involved in the genes located in the complex I of the mitochondrial genome, and were often resulting in a change of a moderately or highly conserved amino acid of their corresponding protein. Mitochondrial respiratory function was also compromised in a TT cell line, which carries mtDNA mutation at nt 4917 and 11,720, and in peripheral lymphocytes of MTC patients with mtDNA mutations. These data suggest that mtDNA mutation may be involved in MTC tumourigenesis and progression. Given that mtDNA mutation spectra are different between sporadic and familial MTC, different mechanisms of oxidative DNA damage may occur in the disease process.
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Zou M, Al-Baradie RS, Al-Hindi H, Farid NR, Shi Y. S100A4 (Mts1) gene overexpression is associated with invasion and metastasis of papillary thyroid carcinoma. Br J Cancer 2006; 93:1277-84. [PMID: 16265347 PMCID: PMC2361511 DOI: 10.1038/sj.bjc.6602856] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Tumour cell invasion and metastasis are the hallmark of malignant neoplasm. S100A4 is a member of small calcium-binding protein family and is involved in the cell proliferation and cancer progression. S100A4 is capable of inducing metastasis in animal models and is associated with aggressive phenotype of human tumours. We previously identified S100A4 as a candidate gene involved in anaplastic thyroid cancer metastasis by microarray analysis. To further determine whether S100A4 overexpression is associated with thyroid tumour invasion and metastasis, in the present study, we examined S100A4 gene expression in six benign multinodular goitres (MNG) and 28 matched samples of adjacent normal thyroid tissue (N), primary (T) and metastatic (M) papillary thyroid carcinomas (PTC) by immunohistochemistry and real-time reverse transcription–polymerase chain reaction (RT-PCR) analysis. This gave us the advantage of directly comparing levels of S100A4 expression within the same genetic background. Using immunohistochemistry, we found that high levels of S100A4 were detected in 24 of 28 (86%) PTC specimens and their local regional lymph node or distant metastases. No S100A4 staining was observed in normal thyroid tissues and simple MNG. However, in MNG coexistent with PTC, moderate focal staining could be found in 11 of 15 MNG adjacent to PTC. The S100A4 was stained more intensely in invading fronts than in central portions of both T and M. Real-time RT–PCR analysis of primary tumours and their matched lymph node metastasis demonstrated that significantly higher S100A4 transcripts were present in metastatic tumours as compared to the primary tumours (P<0.01). These data suggest that overexpression of S100A4 is associated with thyroid tumour invasion and metastasis and it may be a potential target for therapeutic intervention.
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Tang H, Pecharsky VK, Samolyuk GD, Zou M, Gschneidner KA, Antropov VP, Schlagel DL, Lograsso TA. Anisotropy of the magnetoresistance in Gd5Si2Ge2. PHYSICAL REVIEW LETTERS 2004; 93:237203. [PMID: 15601197 DOI: 10.1103/physrevlett.93.237203] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2004] [Indexed: 05/24/2023]
Abstract
The observed magnetoresistance of single crystalline Gd5Si2Ge2 is negative and strongly anisotropic. The absolute values measured along the [100] and [010] directions exceed those parallel to the [001] direction by more than 60%. First principles calculations demonstrate that a structural modification is responsible for the anisotropy of the magnetoresistance, and that the latter is due to a significant reduction of electronic velocity in the [100] direction and the anisotropy of electrical conductivity.
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Abu-Amero K, Zou M, Shi Y. Mitochondrial A135149 mutation without MELAS but in association with papillary thyroid carcinoma. Clin Genet 2004; 66:569-70. [PMID: 15521990 DOI: 10.1111/j.1399-0004.2004.00365.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ruderman NB, Cacicedo JM, Itani S, Yagihashi N, Saha AK, Ye JM, Chen K, Zou M, Carling D, Boden G, Cohen RA, Keaney J, Kraegen EW, Ido Y. Malonyl-CoA and AMP-activated protein kinase (AMPK): possible links between insulin resistance in muscle and early endothelial cell damage in diabetes. Biochem Soc Trans 2003; 31:202-6. [PMID: 12546685 DOI: 10.1042/bst0310202] [Citation(s) in RCA: 113] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Based on available evidence, we would propose the following. (i) Excesses of glucose and free fatty acids cause insulin resistance in skeletal muscle and damage to the endothelial cell by a similar mechanism. (ii) Key pathogenetic events in this mechanism very likely include increased fatty acid esterification, protein kinase C activation, an increase in oxidative stress (demonstrated to date in endothelium) and alterations in the inhibitor kappa B kinase/nuclear factor kappa B system. (iii) Activation of AMP-activated protein kinase (AMPK) inhibits all of these events and enhances insulin signalling in the endothelial cell. It also enhances insulin action in muscle; however, the mechanism by which it does so has not been well studied. (iv) The reported beneficial effects of exercise and metformin on cardiovascular disease and insulin resistance in humans could be related to the fact that they activate AMPK. (v) The comparative roles of AMPK in regulating metabolism, signalling and gene expression in muscle and endothelial cells warrant further study.
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Sang S, Zou M, Xia Z, Lao A, Chen Z, Ho CT. New spirostanol saponins from Chinese chives (Allium tuberosum). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2001; 49:4780-4783. [PMID: 11600021 DOI: 10.1021/jf010529v] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Three new spirostanol saponins have been isolated from the seeds of Allium tuberosum. On the basis of acid hydrolysis and comprehensive spectroscopic analysis, their structures were established as tuberoside J, (25R)-5alpha-spirostan-2alpha,3beta,27-triol 3-O-alpha-L-rhamnopyranosyl-(1-->2)-beta-D-glucopyranoside; tuberoside K, (25R)-5alpha-spirostan-2alpha,3beta,27-triol 3-O-alpha-L-rhamnopyranosyl-(1-->2)-[alpha-L-rhamnopyranosyl-(1-->4)]-beta-D-glucopyranoside; and tuberoside L, 27-O-beta-D-glucopyranosyl-(25R)-5alpha-spirostan-2alpha,3beta,27-triol 3-O-alpha-D-rhamnopyranosyl-(1-->2)-[alpha-L-rhamnopyranosyl-(1-->4)]-beta-D-glucopyranoside.
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