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Heuck CJ, Jethava Y, Khan R, van Rhee F, Zangari M, Chavan S, Robbins K, Miller SE, Matin A, Mohan M, Ali SM, Stephens PJ, Ross JS, Miller VA, Davies F, Barlogie B, Morgan G. Inhibiting MEK in MAPK pathway-activated myeloma. Leukemia 2015; 30:976-80. [PMID: 26228812 PMCID: PMC4832073 DOI: 10.1038/leu.2015.208] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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252
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Treacy MP, Wynne NC, Gale JL, Duignan E, Moran B, Flynn AM, Ormond P, Barry R, Khan R, Moriarty P, Cassidy L. Mohs micrographic surgery for periocular skin tumours in Ireland. Ir J Med Sci 2015; 185:779-783. [PMID: 26159430 DOI: 10.1007/s11845-015-1296-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Accepted: 04/06/2015] [Indexed: 10/23/2022]
Abstract
OBJECTIVE To describe the shared care and outcomes of patients with periocular skin tumours who underwent Mohs micrographic surgery (MMS) performed by dermatologists, followed by oculoplastic reconstruction undertaken by ophthalmologists at two teaching and one private hospital in Ireland. RESEARCH DESIGN AND METHODS This was a retrospective chart review at the Royal Victoria Eye and Ear Hospital, St James Hospital and the Hermitage Clinic. RESULTS One hundred and twenty seven patients had periocular Mohs surgery between November 2006 and January 2013 mainly indicated for basal cell carcinoma. The mean follow-up time was 2 years and to date there have been no local recurrences. CONCLUSIONS MMS is available in Ireland and should be considered for patients with facial tumours in the ocular region.
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McGeachy P, Villarreal-Barajas JE, Zinchenko Y, Khan R. SU-E-T-368: Evaluating Dosimetric Outcome of Modulated Photon Radiotherapy (XMRT) Optimization for Head and Neck Patients. Med Phys 2015. [DOI: 10.1118/1.4924729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Madamesila J, McGeachy P, Villarreal-Barajas J, Khan R. SU-C-213-02: Characterizing 3D Printing in the Fabrication of Variable Density Phantoms. Med Phys 2015. [DOI: 10.1118/1.4923783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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255
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Rauf A, Khan R, Raza M, Khan H, Pervez S, De Feo V, Maione F, Mascolo N. Suppression of inflammatory response by chrysin, a flavone isolated from Potentilla evestita Th. Wolf. In silico predictive study on its mechanistic effect. Fitoterapia 2015; 103:129-35. [DOI: 10.1016/j.fitote.2015.03.019] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 03/17/2015] [Accepted: 03/18/2015] [Indexed: 01/08/2023]
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Vanaparthy R, Mota P, Khan R, Ehsan M, Qureshi A, ZuWallack R, Leidy N. A longitudinal assessment of sleep variables during exacerbations of chronic obstructive pulmonary disease. Chron Respir Dis 2015; 12:299-304. [PMID: 26033837 DOI: 10.1177/1479972315587517] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Although sleep disturbance is common in chronic obstructive pulmonary disease (COPD), relatively little is known on the effect of the exacerbation on sleep quality. Accordingly, we longitudinally assessed sleep variables during exacerbations and clinical stability. This is a sub-study of a larger observational analysis. Inclusion criteria were clinically stable COPD and two or more clinical exacerbations in the preceding 12 months. Patients were followed for approximately 6 months and during this time the following were recorded daily: (1) COPD exacerbations, which were determined in two ways, clinically and symptom defined using the exacerbations of chronic pulmonary disease tool (EXACT); (2) daytime sleepiness, which was measured using the Stanford Sleepiness Scale; (3) subjective awakenings, which was measured from a sleep diary; and (4) sleep duration, efficiency, and objective awakenings, which was measured from actigraphy. These variables for exacerbation and non-exacerbation days were compared. Seventeen patients (9 male, age 63 ± 12 years, forced expiratory volume in 1 second 52 ± 20%) entered data over 135 ± 18 days. During this time, 15 patients had 27 symptom-defined exacerbations and 8 had 9 clinically reported exacerbations. Symptom-defined exacerbation days were 26% of the total study days. More daytime sleepiness, decreased total sleep time (TST), and decreased sleep efficiency (SE) were present during exacerbations compared with clinical stability (p < 0.001). These disturbances tended to be greater during clinically reported exacerbations than during unreported events (p < 0.05). Increased daytime sleepiness, less TST, and poorer SE are present during COPD exacerbations.
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McGeachy P, Madamesila J, Beauchamp A, Khan R. An open-source genetic algorithm for determining optimal seed distributions for low-dose-rate prostate brachytherapy. Brachytherapy 2015; 14:692-702. [PMID: 26023047 DOI: 10.1016/j.brachy.2015.04.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 04/16/2015] [Accepted: 04/17/2015] [Indexed: 10/23/2022]
Abstract
PURPOSE An open source optimizer that generates seed distributions for low-dose-rate prostate brachytherapy was designed, tested, and validated. METHODS The optimizer was a simple genetic algorithm (SGA) that, given a set of prostate and urethra contours, determines the optimal seed distribution in terms of coverage of the prostate with the prescribed dose while avoiding hotspots within the urethra. The algorithm was validated in a retrospective study on 45 previously contoured low-dose-rate prostate brachytherapy patients. Dosimetric indices were evaluated to ensure solutions adhered to clinical standards. The SGA performance was further benchmarked by comparing solutions obtained from a commercial optimizer (inverse planning simulated annealing [IPSA]) with the same cohort of 45 patients. RESULTS Clinically acceptable target coverage by the prescribed dose (V100) was obtained for both SGA and IPSA, with a mean ± standard deviation of 98 ± 2% and 99.5 ± 0.5%, respectively. For the prostate D90, SGA and IPSA yielded 177 ± 8 Gy and 186 ± 7 Gy, respectively, which were both clinically acceptable. Both algorithms yielded reasonable dose to the rectum, with V100 < 0.3 cc. A reduction in dose to the urethra was seen using SGA. SGA solutions showed a slight prostate volume dependence, with smaller prostates (<25 cc) yielding less desirable, although still clinically viable, dosimetric outcomes. SGA plans used, on average, fewer needles than IPSA (21 vs. 24, respectively), which may lead to a reduction in urinary toxicity and edema that alters post-implant dosimetry. CONCLUSIONS An open source SGA was validated that provides a research tool for the brachytherapy community.
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Sarendranath A, Khan R, Tovar N, Marin C, Yoo D, Redisch J, Jimbo R, Coelho PG. Effect of low speed drilling on osseointegration using simplified drilling procedures. Br J Oral Maxillofac Surg 2015; 53:550-6. [PMID: 25921363 DOI: 10.1016/j.bjoms.2015.03.010] [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] [Received: 07/28/2014] [Accepted: 03/19/2015] [Indexed: 11/18/2022]
Abstract
Our aim was to find out whether simplified drilling protocols would provide biological responses comparable to those of conventional drilling protocols at the low rotational speed of 400rpm. Seventy-eight root form endosseous implants with diameters of 3.75, 4.2, and 5mm were placed into canine tibias and allowed to heal for 3 and 5 weeks. After the dogs had been killed, the samples of implanted bone were retrieved and processed for non-decalcified histological sectioning. Bone-to-implant contact (BIC) and bone area fraction occupancy (BAFO) analyses were made on the histological sections. Implants treated by the simplified protocol resulted in BIC and BAFO values comparable to those obtained with the conventional drilling protocol, and there were no significant differences in the technique or diameter of the drilling. The results suggest that the simplified procedure gives biological outcomes comparable to those of the conventional procedure.
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Ali F, Khan AQ, Khan R, Sultana S. Trichloroethylene-mediated cytotoxicity in human epidermal keratinocytes is mediated by the rapid accumulation of intracellular calcium: Interception by naringenin. Hum Exp Toxicol 2015; 35:147-61. [PMID: 25855085 DOI: 10.1177/0960327115578865] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Industrial solvents pose a significant threat to the humankind. The mechanisms of their toxicity still remain in debate. Trichloroethylene (TCE) is a widespread industrial solvent responsible for severe liver dysfunction, cutaneous toxicity in occupationally exposed humans. We utilized an in vitro system of human epidermal keratinocyte (HaCaT) cells in this study to avoid complex cell and extracellular interactions. We report the cytotoxicity of organic solvent TCE in HaCaT and its reversal by a natural flavanone, naringenin (Nar). The cytotoxicity was attributed to the rapid intracellular free calcium (Ca(2+)) release, which might lead to the elevation of protein kinase C along with robust free radical generation, instability due to energy depletion, and sensitization of intracellular stress signal transducer nuclear factor κB. These effects were actually seen to induce significant amount of genomic DNA fragmentation. Furthermore, all these effects of TCE were effectively reversed by the treatment of Nar, a natural flavanone. Our studies identify intracellular Ca as a unique target used by organic solvents in the cytotoxicity and highlight the Ca(2+) ion stabilizer properties of Nar.
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Khan R, Hunt S, Bekarma H, Ramsay A, Nalagatla SK. MP75-13 STONE CULTURE FOR PATIENTS UNDERGOING FLEXIBLE URETEROSCOPY (FURS) AND LASER STONE FRAGMENTATION FOR RENAL STONE – DOES IT ADD ANYTHING TO MANAGEMENT? J Urol 2015. [DOI: 10.1016/j.juro.2015.02.2710] [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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Khan R, Hunt S, Bekarma H, Ramsay A, Nalagatla SK. MP80-04 CULTURING THE RIGHT MICROORGANISMS IN PATIENTS UNDERGOING PERCUTANEOUS NEPHROLITHOTOMY (PCNL) AND FLEXIBLE URETEROSCOPY (FURS) FOR RENAL STONES – CAN WE DO ANY MORE? J Urol 2015. [DOI: 10.1016/j.juro.2015.02.2840] [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]
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Gupta N, Khan R, Kumar R, Kumar L, Sharma A. Versican and its associated molecules: Potential diagnostic markers for multiple myeloma. Clin Chim Acta 2015; 442:119-24. [DOI: 10.1016/j.cca.2015.01.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Revised: 01/16/2015] [Accepted: 01/16/2015] [Indexed: 01/08/2023]
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Rauf A, Khan R, Khan H, Tokuda H. Cytotoxic, antitumour-promoting and inhibition of protein denaturation effects of flavonoids, isolated from Potentilla evestita Th. Wolf. Nat Prod Res 2015; 29:1775-8. [PMID: 25588733 DOI: 10.1080/14786419.2014.999336] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
This study was designed to evaluate the isolated flavonoids (chrysin 1, and umbelliferone 2) from Potentilla evestita for cytotoxic, antitumour-promoting and inhibition of protein denaturation activities. The results showed marked cytotoxic effect of compounds 1 and 2 in brine shrimp cytotoxic assay at various concentrations with LD50 of 34.5 and 31.8 mg/mL, respectively. In Epstein-Barr-virus early antigen activation assay, both compounds 1 and 2 illustrated significant antitumour-promoting effect with IC50 values of 462 and 308 mol ratio/32 pmol TPA, respectively. The cytotoxic and antitumour-promoting effects of compounds were strongly supported by inhibition of protein denaturation activity with IC50 of 119 and 112 μg/mL, respectively. In conclusion, both compounds possess strong cytotoxic, antitumour-promoting and inhibition of protein denaturation activities.
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Khan R, Kariya PB, Mallikarjuna R, Singh AN. Fusion of permanent maxillary right central incisor and mesiodens in an 8-year-old child. BMJ Case Rep 2015; 2015:bcr-2014-208541. [PMID: 25564644 DOI: 10.1136/bcr-2014-208541] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Khan R, Idris M, Tuncel D. Synthesis and investigation of singlet oxygen production efficiency of photosensitizers based on meso-phenyl-2,5-thienylene linked porphyrin oligomers and polymers. Org Biomol Chem 2015; 13:10496-504. [DOI: 10.1039/c5ob01435b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three new Zn(ii)-, oligo- and poly(2,5-thienylene)-linked porphyrins, bearing multiple triethylene glycol (TEG) groups were synthesized and their photophysical properties as well as singlet oxygen generation efficiencies have been investigated to elucidate the possibility of their use as a photosensitizer.
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Mehboob K, Park K, Khan R. Quantification of in-containment fission products source term for 1000 MWe PWR under loss of coolant accident. ANN NUCL ENERGY 2015. [DOI: 10.1016/j.anucene.2014.08.056] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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267
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Rehman MU, Ali N, Rashid S, Jain T, Nafees S, Tahir M, Khan AQ, Lateef A, Khan R, Hamiza OO, Kazim S, Qamar W, Sultana S. Alleviation of hepatic injury by chrysin in cisplatin administered rats: Probable role of oxidative and inflammatory markers. Pharmacol Rep 2014; 66:1050-9. [DOI: 10.1016/j.pharep.2014.06.004] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2013] [Revised: 04/17/2014] [Accepted: 06/05/2014] [Indexed: 12/23/2022]
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Rauf A, Khan R, Khan H, Ullah B, Pervez S. Antipyretic and antinociceptive potential of extract/fractions of Potentilla evestita and its isolated compound, acacetin. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2014; 14:448. [PMID: 25407486 PMCID: PMC4247777 DOI: 10.1186/1472-6882-14-448] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 09/19/2014] [Indexed: 11/16/2022]
Abstract
Background Fever and pain management is a very challenging job for the clinician as the available synthetic agents are causing serious side effects. The present research article deals with the antipyretic and antinociceptive activity of extract/fractions of Potentilla evestita and acacetin isolated from the chloroform fraction of the plant. Methods Various chromatographic and spectroscopic techniques were used for the isolation and characterizion of compound. In-vivo yeast induced fibrile mice were used for antipyretic activity while acetic acid induced writhing and formalin tests were used for antinociceptive. Results The extract/fractions of P. evestita caused marked antipyretic effect during various assessment times in which chloroform was the most prominent followed by ethyl acetate. When acacetin was injected, it produced marked effect with maximum activity of 33.28% and 55.01% at 5 and 10 mg/kg i.p respectively. When studied in acetic acid induced writhing test, the extract/fractions evoked significant antinociceptive effect in which chloroform was the most effective fraction followed by ethyl acetate. Acacetin showed significant antinociceptive effect with 44.77% and 67.03% reduction in abdominal constriction at 5 and 10 mg/kg i.p., respectively. Similarly, it evoked significant dose dependent reduction in noxious stimulation with 42.07% and 64.57% pain attenuation at 5 and 10 mg/kg i.p., respectively in initial phase. In the late phase, it illustrated more dominant effect with 46.32% and 67.29% reduction of painful sensation. Conclusions In conclusion, the extract/fractions of P. evestita as well as the isolated compound, acacetin showed strong antipyretic and antinociceptive activity in various animal models possibly mediated through both peripheral and central mechanism.
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Majed F, Rashid S, Khan AQ, Nafees S, Ali N, Ali R, Khan R, Hasan SK, Mehdi SJ, Sultana S. Tannic acid mitigates the DMBA/croton oil-induced skin cancer progression in mice. Mol Cell Biochem 2014; 399:217-28. [DOI: 10.1007/s11010-014-2248-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Accepted: 10/09/2014] [Indexed: 12/14/2022]
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Hasan SK, Khan R, Ali N, Khan AQ, Rehman MU, Tahir M, Lateef A, Nafees S, Mehdi SJ, Rashid S, Shahid A, Sultana S. 18-β Glycyrrhetinic acid alleviates 2-acetylaminofluorene-induced hepatotoxicity in Wistar rats. Hum Exp Toxicol 2014; 34:628-41. [DOI: 10.1177/0960327114554045] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
2-Acetylaminofluorene (2-AAF) is a known hepatic carcinogen which leads to tumour formation in rodents. 18-β Glycyrrhetinic acid (18 β-GA) derived from liquorice plant has various pharmacological properties such as anti-ulcer, anti-inflammatory, antiviral, hepatoprotective and antioxidant. This study is designed to elucidate the chemopreventive properties of 18 β-GA against 2-AAF-induced liver toxicity in Wistar rats and evaluated its effect on inflammatory and tumour promotion marker and activities of different oxidative stress enzymes. Administration of 2-AAF at the dose of (50 mg/kg body weight (b.w.) intraperitoneally (i.p.)) for five consecutive days induces hepatic toxicity, inflammation, oxidative stress and hyperproliferation. Pretreatment with 18 β-GA at two different doses (45 and 75 mg kg−1 b.w.) significantly ameliorates 2-AAF-induced increased lipid peroxidation, alanine transaminase and aspartate transaminase, xanthine oxidase activities and activities of phase-II detoxifying enzymes along with the levels of glutathione content. Administration of 18 β-GA also significantly restored the expressions of proliferating cell nuclear antigen, cyclooxygenase 2, inducible nitric oxide synthase and nuclear factor κB. Furthermore, histological observations also support the preventive effects of 18 β-GA. Our findings suggest that pretreatment with 18 β-GA showed potential hepatoprotective effects via attenuation of oxidative stress, inflammation and hyperproliferation.
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Dafterdar R, Al-Fayoumi M, Saadeddin S, Khan R, Alothaim A, Hasanato R, Al-Shangiti A, Fakhoury H, Tamimi W. Vitamin D immunoassay systems: a comparison. Br J Biomed Sci 2014; 71:127-30. [PMID: 25265759 DOI: 10.1080/09674845.2014.11978289] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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272
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Cheung M, Ng S, Goyal U, Kratz S, Gernon T, Avery R, Aly F, Kuo P, Erman A, Khan R, Yi S. Optimal Timing of Initial PET/CT Surveillance Scan After Radiation Therapy for Head and Neck Cancers. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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273
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Zullino DF, Khan R, Thorens G, Achab S, Khazaal Y, Calzada G, Manghi R. SY09-2 * HARM REDUCTION IN SUBSTANCE RELATED ADDICTIONS. Alcohol Alcohol 2014. [DOI: 10.1093/alcalc/agu052.42] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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274
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Taggar A, Lau H, Lim G, Nordal R, Khan R, Breitman K, Hudson A, Spencer D, Voroney J. Outcomes From First 3 Years of Frameless Stereotactic Radiosurgery in Treating Brain Metastases. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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275
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Khan R, Thorens G, Zullino D. SY09-4 * TRANSLATING, HARM REDUCTION INTO POLICIES, THE SWISS EXPERIENCE. Alcohol Alcohol 2014. [DOI: 10.1093/alcalc/agu052.44] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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