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Tekin G, Stenderup K, Ljungberg C, Menon M, Gaestel M, Johansen C, Iversen L. 401 Septin7 plays a role in imiquimod induced psoriasis-like skin inflammation in mice. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.06.421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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McGeoghan F, O’Toole E, Caley M, Menon M, Dewan P, Donaldson M. 375 Modelling and understanding pathomechanisms of X-linked recessive ichthyosis in vitro. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.02.408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Andriotis AN, Menon M. ZnO gap engineering by doping with III-V compounds. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:035803. [PMID: 26733358 DOI: 10.1088/0953-8984/28/3/035803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Gap engineering of ZnO by codoping it with III-V materials is investigated using model and ab initio calculation. Our results show that the codoped materials (ZnO)1-x (III-V)x , where (III-V) stands for GaN, AlN, AlP, BN, BP exhibit energy band gaps that get smaller as the dopant concentrations x is increased. Even at a very small dopant concentration the obtained band gaps are found to be much smaller than that of ZnO making the studied (ZnO)1-x(III-V)x materials promising candidates for photoelectrochemical water splitting.
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Moritz S, Werner D, Menon M, Balzan RP, Woodward TS. Jumping to negative conclusions--a case of study-gathering bias? Psychol Med 2016; 46:59-61. [PMID: 26490783 DOI: 10.1017/s0033291715002068] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Abdollah F, Sammon JD, Reznor G, Sood A, Schmid M, Klett DE, Sun M, Aizer AA, Choueiri TK, Hu JC, Kim SP, Kibel AS, Nguyen PL, Menon M, Trinh QD. Medical androgen deprivation therapy and increased non-cancer mortality in non-metastatic prostate cancer patients aged ≥66 years. Eur J Surg Oncol 2015. [PMID: 26210655 DOI: 10.1016/j.ejso.2015.06.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
PURPOSE To examine the potential relationship between androgen deprivation therapy and other-cause mortality (OCM) in patients with prostate cancer treated with medical primary-androgen deprivation therapy, prostatectomy, or radiation. METHODS A total of 137,524 patients with non-metastatic PCa treated between 1995 and 2009 within the Surveillance Epidemiology and End Results Medicare-linked database were included. Cox-regression analysis tested the association of ADT with OCM. A 40-item comorbidity score was used for adjustment. RESULTS Overall, 9.3% of patients harbored stage III-IV disease, and 57.7% of patients received ADT. The mean duration of ADT exposure was 22.9 months (median: 9.1; IQR: 2.8-31.5). Mean and median follow-up were 66.9, and 60.4 months, respectively. At 10 years, overall-OCM rate was 36.5%; it was 30.6% in patients treated without ADT vs. 40.1% in patients treated with ADT (p < 0.001). In multivariable-analysis, ADT was associated with an increased risk of OCM (Hazard-ratio [HR]: 1.11, 95% Confidence-interval [95% CI]: 1.08-1.13). Patients with no comorbidity (10-year OCM excess risk: 9%) were more subject to harm from ADT than patients with high comorbidity (10-year OCM excess risk: 4.7%). CONCLUSIONS In patients with PCa, treatment with medical ADT may increase the risk of mortality due to causes other than PCa. Whether this is a simple association or a cause-effect relationship is unknown and warrants further study in prospective studies.
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Sood A, Penna F, Eleswarapu S, Pucheril D, Klett D, Abd-El-Barr AER, Abdollah F, Lakshmanan Y, Menon M, Trinh QD, Sammon J, Elder J. 503 Incidence, admission rates and economic burden of pediatric emergency department visits for urinary tract infection. EUROPEAN UROLOGY SUPPLEMENTS 2015; 14:e503-e503a. [DOI: 10.1016/s1569-9056(15)60496-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Dhami MS, Menon M, Parke DV, Dhami MF, Afzal M. Chronotoxicity as related to chronobiology. ACTA ACUST UNITED AC 2015; 13:231-60. [PMID: 21568803 DOI: 10.1515/dmdi.1997.13.4.231] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
This review focuses primarily on the complexities of chronotoxicity and chronopharmacology (time-of-day effects on the metabolism of environmental chemicals and therapeutic agents as related to chronobiology). The nature of the melatonin signal may modify the function of the hepatic endoplasmic reticulum resulting in variations in the metabolism of xenobiotic chemicals. Concepts are explored for modification of exposure limits and/or Threshold Limit Values (TLVs) of industrial chemicals in risk assessment and health effects of workers on rotating shifts. The TLVs of chemicals may be changed during work shift schedules to minimize adverse health effects among workers.
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Shahzad F, Wong K, Di Candia M, Menon M, Malata C. Gluteal fold flap in perineal reconstruction for Crohn's disease-associated fistulae. J Plast Reconstr Aesthet Surg 2014; 67:1587-90. [DOI: 10.1016/j.bjps.2014.05.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2014] [Revised: 05/19/2014] [Accepted: 05/20/2014] [Indexed: 10/25/2022]
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Saar M, Syed J, Guru K, Dibaj S, Field E, Khan A, Kibel A, Mottrie A, Weizer A, Wagner A, Hemal A, Scherr D, Schanne F, Gaboardi F, Wu G, Peabody J, Kaouk J, Palou Redorta J, Rha K, Richstone L, Balbay M, Menon M, Hayn M, Woods M, Wiklund P, Dasgupta P, Pruthi R, Grubb R, Khan M, Siemer S, Wilson T, Wilding G, Stöckle M. PE67: Early oncologic failure after robot-assisted radical cystectomy: Results from the international robotic cystectomy consortium. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/s1569-9056(14)50098-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Zhang W, OʼConnell P, Menon M, Yi Z, Gallon L, Luan Y, Rosales I, Schroppel B, Losic B, Samaniego M, Djamali A, Alexander S, Najafian N, Nankivell B, Chapman J, Smith R, Colvin R, Murphy B. Identification of a Molecular Signature to Predict the Progression of Kidney Fibrosis Post Transplantation. Transplantation 2014. [DOI: 10.1097/00007890-201407151-03016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Panagiotopoulou IG, Fitzrol D, Parker RA, Kuzhively J, Luscombe N, Wells AD, Menon M, Bajwa FM, Watson MA. The yield of colorectal cancer among fast track patients with normocytic and microcytic anaemia. Ann R Coll Surg Engl 2014; 96:289-93. [PMID: 24780021 DOI: 10.1308/003588414x13814021680076] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
INTRODUCTION We receive fast track referrals on the basis of iron deficiency anaemia (IDA) for patients with normocytic anaemia or for patients with no iron studies. This study examined the yield of colorectal cancer (CRC) among fast track patients to ascertain whether awaiting confirmation of IDA is necessary prior to performing bowel investigations. METHODS A review was undertaken of 321 and 930 consecutive fast track referrals from Centre A and Centre B respectively. Contingency tables were analysed using Fisher's exact test. Logistic regression analyses were performed to investigate significant predictors of CRC. RESULTS Overall, 229 patients were included from Centre A and 689 from Centre B. The odds ratio for microcytic anaemia versus normocytic anaemia in the outcome of CRC was 1.3 (95% confidence interval [CI]: 0.5-3.9) for Centre A and 1.6 (95% CI: 0.8-3.3) for Centre B. In a logistic regression analysis (Centre B only), no significant difference in CRC rates was seen between microcytic and normocytic anaemia (adjusted odds ratio: 1.9, 95% CI: 0.9-3.9). There was no statistically significant difference in the yield of CRC between microcytic and normocytic anaemia (p=0.515, Fisher's exact test) in patients with anaemia only and no colorectal symptoms. Finally, CRC cases were seen in both microcytic and normocytic groups with or without low ferritin. CONCLUSIONS There is no significant difference in the yield of CRC between fast track patients with microcytic and normocytic anaemia. This study provides insufficient evidence to support awaiting confirmation of IDA in fast track patients with normocytic anaemia prior to requesting bowel investigations.
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Gandaglia G, Karakiewicz PI, Briganti A, Menon M, Sun M, Abdollah F. In reply to the letter to the editor 'in Reply to Gandaglia et al.' by De Bari et al. Ann Oncol 2014; 25:1862-1863. [PMID: 24914042 DOI: 10.1093/annonc/mdu215] [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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Khvostichenko DS, Ng JJD, Perry SL, Menon M, Kenis PJA. Effects of detergent β-octylglucoside and phosphate salt solutions on phase behavior of monoolein mesophases. Biophys J 2014; 105:1848-59. [PMID: 24138861 DOI: 10.1016/j.bpj.2013.09.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 08/16/2013] [Accepted: 09/06/2013] [Indexed: 10/26/2022] Open
Abstract
Using small-angle x-ray scattering (SAXS), we investigated the phase behavior of mesophases of monoolein (MO) mixed with additives commonly used for the crystallization of membrane proteins from lipidic mesophases. In particular, we examined the effect of sodium and potassium phosphate salts and the detergent β-octylglucoside (βOG) over a wide range of compositions relevant for the crystallization of membrane proteins in lipidic mesophases. We studied two types of systems: 1), ternary mixtures of MO with salt solutions above the hydration boundary; and 2), quaternary mixtures of MO with βOG and salt solutions over a wide range of hydration conditions. All quaternary mixtures showed highly regular lyotropic phase behavior with the same sequence of phases (Lα, Ia3d, and Pn3m) as MO/water mixtures at similar temperatures. The effects of additives in quaternary systems agreed qualitatively with those found in ternary mixtures in which only one additive is present. However, quantitative differences in the effects of additives on the lattice parameters of fully hydrated mesophases were found between ternary and quaternary mixtures. We discuss the implications of these findings for mechanistic investigations of membrane protein crystallization in lipidic mesophases and for studies of the suitability of precipitants for mesophase-based crystallization methods.
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Wu H, Menon M, Gates E, Balasubramanian A, Bettinger CJ. Reconfigurable topography for rapid solution processing of transparent conductors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:706-711. [PMID: 24142533 DOI: 10.1002/adma.201302377] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Revised: 07/22/2013] [Indexed: 06/02/2023]
Abstract
Cost-effective materials for transparent conducting electrodes are essential for many devices used in clean energy production and consumer electronics. Here we report a technique for non-lithographic patterning of silver nanowires on flexible substrates from solution via microcontact transfer printing using donor substrates with reconfigurable topography. This approach is a highly scalable fabrication strategy for high performance transparent conductors.
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Kong D, Heath E, Chen W, Cher M, Powell I, Heilbrun L, Li Y, Ali S, Sethi S, Hassan O, Hwang C, Gupta N, Chitale D, Sakr WA, Menon M, Sarkar FH. Erratum: Epigenetic silencing of miR-34a in human prostate cancer cells and tumor tissue specimens can be reversed by BR-DIM treatment. Am J Transl Res 2013; 6:102-103. [PMID: 24349627 PMCID: PMC3853430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Accepted: 10/18/2013] [Indexed: 06/03/2023]
Abstract
Androgen Receptor (AR) signaling is critically important during the development and progression of prostate cancer (PCa). The AR signaling is also important in the development of castrate resistant prostate cancer (CRPC) where AR is functional even after androgen deprivation therapy (ADT); however, little is known regarding the transcriptional and functional regulation of AR in PCa. Moreover, treatment options for primary PCa for preventing the occurrence of CRPC is limited; therefore, novel strategy for direct inactivation of AR is urgently needed. In this study, we found loss of miR-34a, which targets AR, in PCa tissue specimens, especially in patients with higher Gleason grade tumors, consistent with increased expression of AR. Forced over-expression of miR-34a in PCa cell lines led to decreased expression of AR and prostate specific antigen (PSA) as well as the expression of Notch-1, another important target of miR-34a. Most importantly, BR-DIM intervention in PCa patients prior to radical prostatectomy showed reexpression of miR-34a, which was consistent with decreased expression of AR, PSA and Notch-1 in PCa tissue specimens. Moreover, BR-DIM intervention led to nuclear exclusion both in PCa cell lines and in tumor tissues. PCa cells treated with BR-DIM and 5-aza-dC resulted in the demethylation of miR-34a promoter concomitant with inhibition of AR and PSA expression in LNCaP and C4-2B cells. These results suggest, for the first time, epigenetic silencing of miR-34a in PCa, which could be reversed by BR-DIM treatment and, thus BR-DIM could be useful for the inactivation of AR in the treatment of PCa.[This corrects the article on p. 14 in vol. 4.].
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Farah N, Gorrela R, Bhowmik A, Bothamley GH, Menon M, Devalia K, Koak Y, Agrawal S, Mannur K, Rajakulasingam K. P255 Improvement of sleep apnoea severity in obese patients pre and post bariatric surgery-is there more to it? Thorax 2013. [DOI: 10.1136/thoraxjnl-2013-204457.407] [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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Trikudanathan G, Trivedi A, Menon M. Education and Imaging. Gastrointestinal: gastric hemangiopericytoma: an unusual cause of upper gastrointestinal bleeding. J Gastroenterol Hepatol 2013; 28:1586. [PMID: 24215085 DOI: 10.1111/jgh.12344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
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George JM, Menon M, Gupta P, Tan M. Use of strong opioids for chronic non-cancer pain: a retrospective analysis at a pain centre in Singapore. Singapore Med J 2013; 54:506-10. [DOI: 10.11622/smedj.2013173] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Jin SH, Dunham SN, Song J, Xie X, Kim JH, Lu C, Islam A, Du F, Kim J, Felts J, Li Y, Xiong F, Wahab MA, Menon M, Cho E, Grosse KL, Lee DJ, Chung HU, Pop E, Alam MA, King WP, Huang Y, Rogers JA. Using nanoscale thermocapillary flows to create arrays of purely semiconducting single-walled carbon nanotubes. NATURE NANOTECHNOLOGY 2013; 8:347-55. [PMID: 23624697 DOI: 10.1038/nnano.2013.56] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2012] [Accepted: 03/14/2013] [Indexed: 05/13/2023]
Abstract
Among the remarkable variety of semiconducting nanomaterials that have been discovered over the past two decades, single-walled carbon nanotubes remain uniquely well suited for applications in high-performance electronics, sensors and other technologies. The most advanced opportunities demand the ability to form perfectly aligned, horizontal arrays of purely semiconducting, chemically pristine carbon nanotubes. Here, we present strategies that offer this capability. Nanoscale thermocapillary flows in thin-film organic coatings followed by reactive ion etching serve as highly efficient means for selectively removing metallic carbon nanotubes from electronically heterogeneous aligned arrays grown on quartz substrates. The low temperatures and unusual physics associated with this process enable robust, scalable operation, with clear potential for practical use. We carry out detailed experimental and theoretical studies to reveal all of the essential attributes of the underlying thermophysical phenomena. We demonstrate use of the purified arrays in transistors that achieve mobilities exceeding 1,000 cm(2) V(-1) s(-1) and on/off switching ratios of ∼10,000 with current outputs in the milliamp range. Simple logic gates built using such devices represent the first steps toward integration into more complex circuits.
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Patel T, Wambi CC, Inusa MD, Menon M, Badani K, Berg W. Prostate cancer disease characteristics for foreign-born South Asian men living in the United States. Indian J Cancer 2013; 50:159-63. [DOI: 10.4103/0019-509x.118715] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Pera V, Tamuno P, Menon M, Devlin G. Efficacy and Safety of Drug Eluting Balloon: A Single Centre Experience. Heart Lung Circ 2013. [DOI: 10.1016/j.hlc.2013.05.323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Panagiotopoulou IG, Parashar D, Mezher-Sikafi R, Parmar J, Wells AD, Menon M, Jephcott CR. Timing of surgery after neoadjuvant long-course chemoradiotherapy in the management of locally advanced rectal cancer. Clin Oncol (R Coll Radiol) 2012; 24:e195. [PMID: 22999843 DOI: 10.1016/j.clon.2012.09.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Revised: 08/31/2012] [Accepted: 09/06/2012] [Indexed: 01/29/2023]
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Bianchi M, Sun M, Jeldres C, Shariat SF, Trinh QD, Briganti A, Tian Z, Schmitges J, Graefen M, Perrotte P, Menon M, Montorsi F, Karakiewicz PI. Distribution of metastatic sites in renal cell carcinoma: a population-based analysis. Ann Oncol 2011; 23:973-80. [PMID: 21890909 DOI: 10.1093/annonc/mdr362] [Citation(s) in RCA: 429] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND We assessed the distribution of site-specific metastases in patients with renal cell carcinoma (RCC) according to age. Moreover, we evaluated recommendations proposed by guidelines and focused specifically on bone and brain metastases. PATIENTS AND METHODS Patients with metastatic RCC (mRCC) were abstracted from the Nationwide Inpatient Sample (1998-2007). Age was stratified into four groups: <55, 55-64, 65-74 and ≥ 75 years. Cochran-Armitage trend test and multivariable logistic regression analysis tested the relationship between age and the rate of multiple metastatic sites. Finally, we examined the rates of brain or bone metastases according to the presence of other metastatic sites. RESULTS In 11,157 mRCC patients, the rate of multiple metastatic sites decreased with increasing age (P < 0.001). This phenomenon was confirmed in patients with lung, bone, liver and brain metastases (all P ≤ 0.01). The rate of bone metastases was 10% in patients with exclusive abdominal metastases and 49% in patients with abdominal, thoracic and brain metastases. The rate of brain metastases was 2% in patients with exclusive abdominal metastases and 16% in patients with thoracic and bone metastases. CONCLUSIONS The proportion of patients with multiple metastatic sites is higher in young patients. The rates of bone (10%-49%) and brain (2%-16%) metastases are nonnegligible in mRCC patients.
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Sukumar S, Petros F, Menon M, Rogers C. MP-14.10 Robotic Partial Nephrectomy Using Robotic Bulldog Clamps: Initial Series. Urology 2011. [DOI: 10.1016/j.urology.2011.07.332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Rogers C, Sukumar S, Jeong W, Petros F, Sammon J, Trinh Q, Menon M. MP-14.12 Intraoperative Finding of Gross Lymph Node Metastasis During Robotic Radical Prostatectomy. Urology 2011. [DOI: 10.1016/j.urology.2011.07.334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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