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Herrera MC, Konda KA, Leon SR, Wong PA, Brown B, Caceres CF, Klausner JD. P11.21 Characterising the epidemiology of active hepatitis b virus infection among high-risk men who have sex with men and transgender women in lima, peru. Br J Vener Dis 2015. [DOI: 10.1136/sextrans-2015-052270.469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Benites-Zapata VA, Konda KA, Leon SR, Chow J, Brown B, Caceres CF, Klausner JD. P11.18 Relationship between anal sex behaviours and incident syphilis infection among msm and transgender women from two clinics in lima peru. Br J Vener Dis 2015. [DOI: 10.1136/sextrans-2015-052270.466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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53
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Brown B. Limitations of human papillomavirus DNA testing in measuring previous exposure and vaccine protection. HIV Med 2015; 16:455-6. [DOI: 10.1111/hiv.12248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Hicks C, Danesh M, Brown B, Tyson M, Cyna A. The Tunstall manoeuvre for rapid onset spinal anaesthesia for caesarean section-lost but not forgotten. Anaesth Intensive Care 2015; 43:535-536. [PMID: 26099778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
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Williams M, Brown B, Rao S, Lee J. Withdrawal: Evaluation of beta-mannanase and NSPase inclusion separately or intermittently in reduced energy diets fed to male broilers on performance parameters and carcass yield. J APPL POULTRY RES 2015. [DOI: 10.3382/japr/pfu004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Campasino A, Williams M, Latham R, Bailey C, Brown B, Lee J. Effects of increasing dried distillers’ grains with solubles and non-starch polysaccharide degrading enzyme inclusion on growth performance and energy digestibility in broilers. J APPL POULTRY RES 2015. [DOI: 10.3382/japr/pfv018] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Cooke DA, Crivelli P, Alnis J, Antognini A, Brown B, Friedreich S, Gabard A, Haensch TW, Kirch K, Rubbia A, Vrankovic V. Observation of positronium annihilation in the 2S state: towards a new measurement of the 1S-2S transition frequency. ACTA ACUST UNITED AC 2015. [DOI: 10.1007/s10751-015-1158-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Rickard D, Nkrumah E, Brown B, Artibello J, Donkor C. Improving educational outcomes of girls in rural Ghana: a
multi-intervention, community owned approach. Ann Glob Health 2015. [DOI: 10.1016/j.aogh.2015.02.769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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59
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Williams M, Brown B, Rao S, Lee J. Evaluation of beta-mannanase and nonstarch polysaccharide-degrading enzyme inclusion separately or intermittently in reduced energy diets fed to male broilers on performance parameters and carcass yield. J APPL POULTRY RES 2014. [DOI: 10.3382/japr.2014-01008] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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60
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Kerns J, Brown B, Sokoloff A, Shih G, DerSimonian K. Copper IUD compared to oral medication for emergency contraception: a study of patient choice and satisfaction. Contraception 2014. [DOI: 10.1016/j.contraception.2014.05.161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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61
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Brown B, Edwards M, Tay S. Acceptability of auricular vs frontal bispectral index values. Br J Anaesth 2014; 113:296. [PMID: 25038161 DOI: 10.1093/bja/aeu244] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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62
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Stoner BR, Brown B, Glass JT. Selected Topics on the Synthesis, Properties and Applications of Multiwalled Carbon Nanotubes. DIAMOND AND RELATED MATERIALS 2014; 42:49-57. [PMID: 24910503 PMCID: PMC4043373 DOI: 10.1016/j.diamond.2013.12.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In summary, MWCNTs have been examined for a variety of electronic applications due to their unique structure and chemistry. Electrodes for field emission, energy and sensor applications hold particular interest. MWCNTs provide a very high surface area, relatively easy methods of surface modification, controllable and high concentration of reactive surface sites, and high specific capacitance. Combining MWCNTs with graphene structures, oxide and metal nanoparticles and certain polymers extends their performance and functionality. Such hybrid structures have been produced in situ during CNT growth and in two-step processes. Excellent progress on understanding the mechanisms of CNT growth has enabled numerous growth methods to all yield MWCNT structures in a variety of morphologies.
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Ashiru-Oredope D, Kessel A, Hopkins S, Ashiru-Oredope D, Brown B, Brown N, Carter S, Charlett A, Cichowka A, Faulding S, Gallagher R, Johnson A, McNulty C, Moore M, Patel B, Puleston R, Richman C, Ridge K, Robotham J, Sharland M, Stephens P, Stokle L, Towers K, Underhill J, West T, Whitney L, Wight A, Woodford N, Young T. Antimicrobial stewardship: English Surveillance Programme for Antimicrobial Utilization and Resistance (ESPAUR). J Antimicrob Chemother 2013; 68:2421-3. [DOI: 10.1093/jac/dkt363] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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64
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Proclemer A, Gasparini M, Arenal A, Lunati M, Martinez Ferrer J, Hersi A, Gulaj M, Wijffels M, Brown B, Kloppe A. Termination of arrhythmias by anti-tachycardia pacing is associated with very low healthcare utilization compared to shock therapy in patients with an implantable cardioverter defibrillator. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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65
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Tidy J, Healey J, Brown B. Accuracy of detection of high-grade cervical intra-epithelial neoplasia using electrical impedance spectroscopy with colposcopy. Gynecol Oncol 2013. [DOI: 10.1016/j.ygyno.2013.04.151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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66
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Ivanov SV, Panaccione A, Nonaka D, Prasad ML, Boyd KL, Brown B, Guo Y, Sewell A, Yarbrough WG. Diagnostic SOX10 gene signatures in salivary adenoid cystic and breast basal-like carcinomas. Br J Cancer 2013; 109:444-51. [PMID: 23799842 PMCID: PMC3721393 DOI: 10.1038/bjc.2013.326] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Revised: 06/01/2013] [Accepted: 06/04/2013] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND Salivary adenoid cystic carcinoma (ACC) is an insidious slow-growing cancer with the propensity to recur and metastasise to distant sites. Basal-like breast carcinoma (BBC) is a molecular subtype that constitutes 15-20% of breast cancers, shares histological similarities and basal cell markers with ACC, lacks expression of ER (oestrogen receptor), PR (progesterone receptor), and HER2 (human epidermal growth factor receptor 2), and, similar to ACC, metastasises predominantly to the lung and brain. Both cancers lack targeted therapies owing to poor understanding of their molecular drivers. METHODS Gene expression profiling, immunohistochemical staining, western blot, RT-PCR, and in silico analysis of massive cancer data sets were used to identify novel markers and potential therapeutic targets for ACC and BBC. For the detection and comparison of gene signatures, we performed co-expression analysis using a recently developed web-based multi-experiment matrix tool for visualisation and rank aggregation. RESULTS In ACC and BBC we identified characteristic and overlapping SOX10 gene signatures that contained a large set of novel potential molecular markers. SOX10 was validated as a sensitive diagnostic marker for both cancers and its expression was linked to normal and malignant myoepithelial/basal cells. In ACC, BBC, and melanoma (MEL), SOX10 expression strongly co-segregated with the expression of ROPN1B, GPM6B, COL9A3, and MIA. In ACC and breast cancers, SOX10 expression negatively correlated with FOXA1, a cell identity marker and major regulator of the luminal breast subtype. Diagnostic significance of several conserved elements of the SOX10 signature (MIA, TRIM2, ROPN1, and ROPN1B) was validated on BBC cell lines. CONCLUSION SOX10 expression in ACC and BBC appears to be a part of a highly coordinated transcriptional programme characteristic for cancers with basal/myoepithelial features. Comparison between ACC/BBC and other cancers, such as neuroblastomaand MEL, reveals potential molecular markers specific for these cancers that are likely linked to their cell identity. SOX10 as a novel diagnostic marker for ACC and BBC provides important molecular insight into their molecular aetiology and cell origin. Given that SOX10 was recently described as a principal driver of MEL, identification of conserved elements of the SOX10 signatures may help in better understanding of SOX10-related signalling and development of novel diagnostic and therapeutic tools.
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Brown B, Blas MM, Heidari O, Carcamo C, Halsey NA. Reported changes in sexual behaviour and human papillomavirus knowledge in Peruvian female sex workers following participation in a human papillomavirus vaccine trial. Int J STD AIDS 2013; 24:531-5. [DOI: 10.1177/0956462412473891] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Summary Limited data exist on the effect of clinical trial participation on sexual behavioural change. Two hundred female sex workers working in Lima, Peru received human papillomavirus (HPV) vaccine in either the standard (0, 2, 6 months) or modified (0, 3, 6 months) schedule. Participants received comprehensive screening and treatment for sexually transmitted infections (STIs), counselling on safe sex practices, education about HPV and the HPV vaccine, contraceptives (oral and condoms) and family planning at each visit. We assessed vaccine completion rates, change in sexual practices, and changes in HPV knowledge before and after participation in the vaccine trial. There were high rates of vaccine completion, 91% overall. The estimated number of reported new and total clients over a 30-day period decreased significantly ( P < 0.001). Knowledge about HPV and HPV-related disease increased among all participants. In addition, all participants listed at least one preventive strategy during the month 7 follow-up survey.
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Ainslie MP, Miller C, Brown B, Fox D, Davidson N, Trafford A, Schmitt M. 080 MULTIPARAMETRIC CMR ASSESSMENT OF RV APICAL VERSUS SEPTAL PACING STUDY (MAPS): PRELIMINARY ACUTE HEMODYNAMIC FINDINGS. BRITISH HEART JOURNAL 2013. [DOI: 10.1136/heartjnl-2013-304019.80] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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69
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Mackett R, Brown B. Using transport policy to increase physical activity. J Sci Med Sport 2012. [DOI: 10.1016/j.jsams.2012.11.635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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70
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Ivanov SV, Panaccione A, Brown B, Guo Y, Moskaluk CA, Wick MJ, Brown JL, Ivanova AV, Issaeva N, El-Naggar AK, Yarbrough WG. TrkC signaling is activated in adenoid cystic carcinoma and requires NT-3 to stimulate invasive behavior. Oncogene 2012; 32:3698-710. [PMID: 23027130 DOI: 10.1038/onc.2012.377] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Revised: 07/05/2012] [Accepted: 07/16/2012] [Indexed: 01/11/2023]
Abstract
Treatment options for adenoid cystic carcinoma (ACC) of the salivary gland, a slowly growing tumor with propensity for neuroinvasion and late recurrence, are limited to surgery and radiotherapy. Based on expression analysis performed on clinical specimens of salivary cancers, we identified in ACC expression of the neurotrophin-3 receptor TrkC/NTRK3, neural crest marker SOX10, and other neurologic genes. Here, we characterize TrkC as a novel ACC marker, which was highly expressed in 17 out of 18 ACC primary-tumor specimens, but not in mucoepidermoid salivary carcinomas or head and neck squamous cell carcinoma. Expression of the TrkC ligand NT-3 and Tyr-phosphorylation of TrkC detected in our study suggested the existence of an autocrine signaling loop in ACC with potential therapeutic significance. NT-3 stimulation of U2OS cells with ectopic TrkC expression triggered TrkC phosphorylation and resulted in Ras, Erk 1/2 and Akt activation, as well as VEGFR1 phosphorylation. Without NT-3, TrkC remained unphosphorylated, stimulated accumulation of phospho-p53 and had opposite effects on p-Akt and p-Erk 1/2. NT-3 promoted motility, migration, invasion, soft-agar colony growth and cytoskeleton restructuring in TrkC-expressing U2OS cells. Immunohistochemical analysis demonstrated that TrkC-positive ACC specimens also show high expression of Bcl2, a Trk target regulated via Erk 1/2, in agreement with activation of the TrkC pathway in real tumors. In normal salivary gland tissue, both TrkC and Bcl2 were expressed in myoepithelial cells, suggesting a principal role for this cell lineage in the ACC origin and progression. Sub-micromolar concentrations of a novel potent Trk inhibitor AZD7451 completely blocked TrkC activation and associated tumorigenic behaviors. Pre-clinical studies on ACC tumors engrafted in mice showed efficacy and low toxicity of AZD7451, validating our in vitro data and stimulating more research into its clinical application. In summary, we describe in ACC a previously unrecognized pro-survival neurotrophin signaling pathway and link it with cancer progression.
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Thng C, Babiker ZOE, Brown B, Babu C. The perils of relying on anti-hepatitis B total core antibody in screening individuals infected with HIV. Int J STD AIDS 2012; 23:149-50. [PMID: 22422696 DOI: 10.1258/ijsa.2011.011205] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Co-infection with HIV and hepatitis B virus (HBV) has serious long-term consequences. We describe a case of an HIV-infected heterosexual black African man with a delayed diagnosis of HBV infection. Baseline HBV screening was performed using a sequential testing algorithm starting with a total core antibody (anti-HBc) test, which was negative. He had no evidence of immunity against HBV and subsequently received three unsuccessful courses of HBV vaccination. He had mild but persistent elevation of liver enzymes over a five-year period despite maintaining full suppression of HIV replication on efavirenz, lamivudine and zidovudine; the latter was changed to abacavir due to lipoatrophy. Further testing revealed e-antibody positive chronic HBV infection with undetectable anti-HBc reactivity. High-grade HBV viraemia associated with L180M and M240V drug-resistance mutations was confirmed. He was subsequently switched to a tenofovir-based regimen, which achieved HBV suppression. Adopting effective HBV screening strategies in HIV-infected patients is recommended.
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Brown B, Blas MM, Cabral A, Byraiah G, Guerra-Giraldez C, Sarabia-Vega V, Carcamo C, Gravitt PE, Halsey NA. Human papillomavirus prevalence, cervical abnormalities and risk factors among female sex workers in Lima, Peru. Int J STD AIDS 2012; 23:242-7. [PMID: 22581946 DOI: 10.1258/ijsa.2011.011193] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Female sex workers (FSWs) are at high risk of human papillomavirus (HPV) infection. Questionnaires were administered to 200 FSWs aged 18-26 years in Lima, Peru, to gather risk behaviours, and cervical swab samples were collected for Pap smears and HPV DNA testing as part of a longitudinal study. Participants reported a median of 120 clients in the past month, and 99.2% reported using condoms with clients. The prevalence of any HPV in cervical samples was 66.8%; 34 (17.1%) participants had prevalent HPV 16 or 18, and 92 (46.2%) had one or more oncogenic types. Fifteen women had abnormal Pap smears, 13 of which were HPV DNA positive. Fewer years since first sex was associated with oncogenic HPV prevalence in a model adjusted for previous sexually transmitted infection (STI) status and condom use with partners (prevalence ratio = 0.77, 95% confidence interval [CI] = 0.60-0.97). Our data confirm the high rates of HPV transmission among FSWs in Peru, highlighting the need for early and effective strategies to prevent cervical cancer.
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Cincotta CDM, Wieczorek LM, Barrows B, Brown B, Asher L, Michael N, Marovich M, Polonis VR. The impact of differences in viral entry and trafficking on the mechanism of HIV-1 neutralization. Retrovirology 2012. [PMCID: PMC3442047 DOI: 10.1186/1742-4690-9-s2-p58] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Coppedge J, Oden L, Ratliff B, Brown B, Ruch F, Lee J. Evaluation of nonstarch polysaccharide-degrading enzymes in broiler diets varying in nutrient and energy levels as measured by broiler performance and processing parameters. J APPL POULTRY RES 2012. [DOI: 10.3382/japr.2011-00329] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Brown B, Blas MM, Cabral A, Carcamo C, Gravitt PE, Halsey N. Oral sex practices, oral human papillomavirus and correlations between oral and cervical human papillomavirus prevalence among female sex workers in Lima, Peru. Int J STD AIDS 2011; 22:655-8. [PMID: 22096051 PMCID: PMC4699621 DOI: 10.1258/ijsa.2011.010541] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Few data exist on oral human papillomavirus (HPV) prevalence in female sex workers (FSWs). Information regarding oral sex practices of 185 Peruvian FSWs, 18-26 years of age, was obtained via survey and compared with HPV testing results of oral rinse samples. Oral HPV prevalence was 14/185 (7.6%); four (28.9%) HPV genotypes were carcinogenic. One hundred and eighty-two participants reported having had oral sex; 95% reported condom use during oral sex with clients and 9.5% with partners. Women who had oral sex more than three times with their partners in the past month were more likely to have oral HPV than women who had oral sex three times or less (P = 0.06). Ten (71.4%) women with oral HPV were HPV-positive at the cervix; conversely 8.3% of women with cervical HPV were HPV-positive in the oral cavity. The prevalence of oral HPV was relatively low, considering the high rates of oral sex practiced by these women.
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