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Khan N, Munday D. It's getting harder to breath: non-invasive ventilation (NIV) in advanced chronic obstructive pulmonary disease (COPD). BMJ Support Palliat Care 2012. [DOI: 10.1136/bmjspcare-2012-000264.21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Bersani FS, Minichino A, Enticott PG, Mazzarini L, Khan N, Antonacci G, Raccah RN, Salviati M, Delle Chiaie R, Bersani G, Fitzgerald PB, Biondi M. Deep transcranial magnetic stimulation as a treatment for psychiatric disorders: a comprehensive review. Eur Psychiatry 2012; 28:30-9. [PMID: 22559998 DOI: 10.1016/j.eurpsy.2012.02.006] [Citation(s) in RCA: 112] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Revised: 02/25/2012] [Accepted: 02/26/2012] [Indexed: 12/12/2022] Open
Abstract
Deep transcranial magnetic stimulation (TMS) is a technique of neuromodulation and neurostimulation based on the principle of electromagnetic induction of an electric field in the brain. The coil (H-coil) used in deep TMS is able to modulate cortical excitability up to a maximum depth of 6 cm and is therefore able not only to modulate the activity of the cerebral cortex but also the activity of deeper neural circuits. Deep TMS is largely used for the treatment of drug-resistant major depressive disorder (MDD) and is being tested to treat a very wide range of neurological, psychiatric and medical conditions. The aim of this review is to illustrate the biophysical principles of deep TMS, to explain the pathophysiological basis for its utilization in each psychiatric disorder (major depression, autism, bipolar depression, auditory hallucinations, negative symptoms of schizophrenia), to summarize the results presented thus far in the international scientific literature regarding the use of deep TMS in psychiatry, its side effects and its effects on cognitive functions.
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Kraemer M, Schuknecht B, Jetzer AK, Yonekawa Y, Khan N. Postoperative changes in the superficial temporal artery and the external carotid artery duplex sonography after extra-intracranial bypass surgery in European Moyamoya disease. Clin Neurol Neurosurg 2012; 114:930-4. [PMID: 22480619 DOI: 10.1016/j.clineuro.2012.02.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2011] [Revised: 12/06/2011] [Accepted: 02/06/2012] [Indexed: 11/25/2022]
Abstract
INTRODUCTION Despite Duplex ultrasonography being a noninvasive, easily repeatable, readily available and economical tool, this examination and its normal ranges are rarely described in Moyamoya disease (MMD). METHODS Duplex ultrasonography examinations of the superficial temporal artery (STA) and external carotid artery (ECA) were performed preoperatively, postoperatively (within 30 days) and as follow-up exams (6 months postoperatively) after 32 cerebral revascularization procedures in 20 European patients with MMD. RESULTS A significant higher mean diastolic flow of STA compared to preoperative values was found in postoperative (p<.000) and follow-up exams (p<.001) in Duplex ultrasonography. Postoperative and follow-up Duplex sonography of STA also showed a significantly higher mean systolic flow compared to preoperative values (p<.05 and p<.05). Also ECA showed significantly changes after bypass surgery (p<.05). CONCLUSION Duplex ultrasonography of STA is a reliable and non-invasive tool to investigate hemodynamic changes after bypass surgery and to detect bypass patency in European patients with MMD.
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Zadbuke S, Khan N, Set R, Shastri J. Primary inoculation tuberculosis following a vehicular accident. Indian J Med Microbiol 2012; 30:98-100. [PMID: 22361771 DOI: 10.4103/0255-0857.93058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Tuberculosis is considered as a 're emerging disease', because of its resurgence and increased incidence in the 21 st century particularly in immuno-compromised patients. About one fifth of diagnosed new cases of tuberculosis have an extrapulmonary lesion, of which about one-tenth involve the musculoskeletal system. Tuberculosis involving the soft tissue from adjacent bone or joint is well recognized but cutaneous tuberculous infection is rare, accounting for 0.1% of all cases seen in a dermatology service. We report a case of primary cutaneous tuberculosis of forearm following a vehicular accident in a young immunocompetent female.
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Kumar PR, Khan N, Vivekanandhan S, Satyanarayana N, Mohanty AK, Misra M. Nanofibers: effective generation by electrospinning and their applications. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2012; 12:1-25. [PMID: 22523944 DOI: 10.1166/jnn.2012.5111] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Electrospinning is the most versatile technology in use today, for the generation of polymer nanoscale fibers. The nano materials generated using this technology have a large surface area and are highly porous making it very useful in many applications in diverse fields such as energy storage, healthcare, biotechnology, environmental engineering, defense and security. The production of the fibers and the morphology can be easily controlled by modifications to the processing parameters. The relatively high production rate and simplicity of the setup makes electrospinning highly attractive. This review summarizes the effect of various processing parameters on the effective generation of nanofibers. By simple modifications to the electric field inside the electrospinning chamber the fiber collection can be easily controlled. In addition, the various applications of electrospun fibers in electronic devices, environmental sensors and filters, energy storage, and in biomedicine such as in tissue engineering, drug delivery and enzyme encapsulation are examined and the current research in each field is also explored in this review.
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Khan N. Eruption time of permanent teeth in pakistani children. IRANIAN JOURNAL OF PUBLIC HEALTH 2011; 40:63-73. [PMID: 23113104 PMCID: PMC3481734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Accepted: 09/17/2011] [Indexed: 11/02/2022]
Abstract
BACKGROUND To determine the mean eruption time of permanent teeth of Pakistani children and to evaluate the effects of gender, type of schools, height, weight and body mass index on it. METHODS This cross sectional study was conducted from September 2007 to April 2008. 4370 children of 'just erupted' teeth were obtained from 102 randomly selected schools from 18 towns of Karachi, using systematic random sampling procedure. The dental examination was carried out for the selected child. Height, weight and date of birth were also obtained. Two sample't' test and paired 't' test were employed to compare the mean time of eruption between gender and type of schools (private/ public), and upper and lower jaws. Pearson and partial correlations were used to determine the significant relationship between eruption time with height, weight and BMI. RESULTS The right first molars of upper and lower jaws showed the minimum eruption time. Second molars were the last tooth to emerge. Only 3 teeth showed significant difference of eruption time between the genders. None of contralateral teeth showed any statistical significant difference. All the mandible teeth, except the premolars, erupted earlier than maxillary teeth. Private schools children showed early eruption than the public schools children. The Pearson and partial correlation were significant positively correlated with height. Eruption time of all the teeth, except one, showed positive correlation with weight. CONCLUSION The eruption time of Pakistani children are different in many aspects with to other nationalities.
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Chaudhuri N, Jary H, Lea S, Khan N, Parker LC, Singh D, Sabroe I. P115 Chronic Diesel Exhaust Particle (DEP) exposure differentially alters monocyte differentiation and function in healthy controls compared to COPD. Thorax 2011. [DOI: 10.1136/thoraxjnl-2011-201054c.115] [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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Ravi S, Khan N, Darwis Y. Development and validation of an RP-HPLC-UV method for the determination of ondansetron in rabbit plasma: Application to a pharmacokinetic study. ACTA CHROMATOGR 2011. [DOI: 10.1556/achrom.23.2011.4.4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Piper KP, Karanth M, McLarnon A, Kalk E, Khan N, Murray J, Pratt G, Moss PAH. Chronic lymphocytic leukaemia cells drive the global CD4+ T cell repertoire towards a regulatory phenotype and leads to the accumulation of CD4+ forkhead box P3+ T cells. Clin Exp Immunol 2011; 166:154-63. [PMID: 21985361 DOI: 10.1111/j.1365-2249.2011.04466.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Advanced chronic lymphocytic leukaemia (CLL) is associated with profound immunodeficiency, including changes in T regulatory cells (T(regs)). We determined the pattern of expression of forkhead box P3 (FoxP3), CD25, CD27 and CD127 and showed that the frequency of CD4+ FoxP3+ T cells was increased in CLL patients (12% versus 8% in controls). This increase was seen only in advanced disease, with selective expansion of FoxP3-expressing cells in the CD4+ CD25(low) population, whereas the number of CD4+ CD25(high) FoxP3+ cells was unchanged. CD4+ CD25(low) cells showed reduced expression of CD127 and increased CD27, and this regulatory phenotype was also seen on all CD4 T cells subsets in CLL patients, irrespective of CD25 or FoxP3 expression. Incubation of CD4+ T cells with primary CLL tumours led to a sixfold increase in the expression of FoxP3 in CD4+ CD25- T cells. Patients undergoing treatment with fludarabine demonstrated a transient increase in the percentage of CD4+ FoxP3+ T cells, but this reduced to normal levels post-treatment. This work demonstrates that patients with CLL exhibit a systemic T cell dysregulation leading to the accumulation of CD4+ FoxP3+ T cells. This appears to be driven by interaction with malignant cells, and increased understanding of the mechanisms that are involved could provide novel avenues for treatment.
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Kraemer M, Heinemann FM, Horn PA, Venker C, Berlit P, Krischek B, Khan N. Inheritance of moyamoya disease in a Caucasian family. Eur J Neurol 2011; 19:438-42. [DOI: 10.1111/j.1468-1331.2011.03536.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Khan N, Khan M, Bena J, Torres V, Singh A, Macklis R. Factors Predictive of Developing Radiation Retinopathy (RR) and Vision Loss following Plaque Brachytherapy for Uveal Melanoma. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1771] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Bari MS, Haque N, Talukder SA, Chowdhury LH, Zahid MK, Hassanuzzaman SM, Alam MM, Huq MA, Hasina K, Khan N, Mahmud AA, Ali MS, Alam MN. Postoperative pain relief following inguinal hernia repair in children by wound infiltration with levobupivacaine. Mymensingh Med J 2011; 20:586-590. [PMID: 22081174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The present study has been designed to compare the postoperative pain relief for inguinal hernia repair in children through wound infiltration with levobupivacaine with that provided by paracetamol administration per rectaly. This interventional study was carried out in the Department of Paediatric surgery, Mymensingh Medical College Hospital, Mymensingh and Dhaka Medical College Hospital, Dhaka, during the period from January 2009 to September 2010. A total of 120 patients were included in this study. Among them 60 patients in Group-A (study group) where post incisional wound infiltration with levobupivacain after inguinal herniotomy and before skin closure was done and 60 patients in Group-B (control group) where paracetamol was given per rectally after anesthesia induction. Both groups were followed up post operatively for 23 hours. In Group A maximum analgesic period was 8.30 hours and minimum analgesic period was 5.30 hours. On the other hand in Group B maximum analgesic period was 6.50 hours and minimum analgesic period was 4.50 hours. Duration of post operative analgesia between two groups of the patients were significant [p<0.01]. Post incisional wound infiltration with levobupivacain has significantly better efficacy to rectal administration of paracetamol with respect to providing pain relief following inguinal hernia repair in children. Longer duration of analgesic action is more achieved in the Levobupivacaine group.
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Kraemer M, Berlit P, Diesner F, Khan N. What is the expert's option on antiplatelet therapy in moyamoya disease? Results of a worldwide Survey. Eur J Neurol 2011; 19:163-7. [DOI: 10.1111/j.1468-1331.2011.03481.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bako B, Umar NI, Garba N, Khan N. Informed consent practices and its implication for emergency obstetrics care in azare, north-eastern Nigeria. Ann Med Health Sci Res 2011; 1:149-57. [PMID: 23209969 PMCID: PMC3507103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Revised: 08/21/2011] [Accepted: 12/22/2011] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Consent practices can affect the institution of emergency obstetrics care in the health facility, and may indeed, determine the degree of maternal mortality and morbidity. OBJECTIVES This study was aimed at determining informed consent practices and its implication for Emergency Obstetrics Care (EOC). METHODS A cross-sectional study involving 787 women who presented with obstetric emergencies at the FMC Azare from 1(st) January 2008 to 31(st) December 2009 was done. The sociodemographic characteristics and birth outcome were compared between those that gave early consent (EC) and those that gave delayed consent (DC). Data was analysed using SPSS version 11. Morbidities and mortalities were compared in the two groups and P < 0.05 was considered statistically significant. RESULTS EC for obstetric intervention was obtained in 260 (33.0%) of the cases, while 527 (66.0%) gave DC. The mean length of time for DC was 4.5 ± 3.5 hours (Range 1.25 to 72 hours). In 62.9% of cases the consent was given by the husband while the patient consented in 5.6%. In-laws, relatives and others were responsible for 13.8%, 8.5%, 5.7% and 3.5% respectively. Consent was significantly delayed when given by the husbands, in-laws and relatives. Patients that gave consents for their own treatment were more likely to be gainfully employed (P=0.019), educated (P=0.004) and booked (P=0.001). Maternal mortality, intrauterine fetal death, low Apgar scores and early neonatal death were significantly increased in the DC group with P values of 0.016, 0.032 and 0.026 respectively. CONCLUSION Delay in giving Consent contributes significantly to maternal and fetal morbidity and mortality in our environment because it increases the 3(rd) level of delay.
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Ketabchi A, Sah S, Khan N, Halfpenny W, Thiruchelvam J. Management of the neck in the occult primary: results of a national audit. Br J Oral Maxillofac Surg 2011. [DOI: 10.1016/j.bjoms.2011.03.142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Caldwell JC, Borbas Z, Moreton N, Khan N, Kerzin-Storrar L, Metcalfe K, Newman W, Garratt CJ. 162 The clinical management of relatives of young sudden arrhythmic death victims; icds are rarely indicated. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300198.162] [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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Ismail F, Khan N, Van de Werke I, Ahmed R. A severe case of astrogliosis and encephalomalacia in a neonate with a massive vein of Galen malformation (VGM). SA J Radiol 2011. [DOI: 10.4102/sajr.v15i2.324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Vein of Galen malformations (VGMs) are rare anomalies of intracranial circulation that constitute 1% of all intracranial vascular malformations. We describe a case of severe encephalomalacia associated with a VGM, which has not been previously described.
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Ismail F, Van de Werke I, Khan N, Levay P, Davel G. Radiological chest manifestations in diffuse infiltrative lymphocytosis syndrome (DILS). SA J Radiol 2011. [DOI: 10.4102/sajr.v15i2.325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
This report focuses on the radiological manifestations of diffuse interstitial lymphocytosis syndrome (DILS) in the chest. Awareness of this entity and early diagnosis by radiologists will enable timeous intervention by clinicians.
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Khan Z, Khan N, Varma AK, Tiwari RP, Mouhamad S, Prasad GBKS, Bisen PS. Oxaliplatin-mediated inhibition of survivin increases sensitivity of head and neck squamous cell carcinoma cell lines to paclitaxel. Curr Cancer Drug Targets 2011; 10:660-9. [PMID: 20578991 DOI: 10.2174/156800910793605866] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2009] [Accepted: 04/13/2010] [Indexed: 11/22/2022]
Abstract
The present study deals with the evaluation of the efficacy of oxaliplatin and paclitaxel combination as a potential strategy in controlling HNSCC cell proliferation and the assessment of correlation between occurrence of apoptosis and changes in expression of survivin (IAP). The panel cell lines included two HNSCC cell lines (Cal27 and NT8e) and one normal cell line (293) with differential level of survivin expression in accordance with chemosensitivity. The cytotoxicity and effect of drugs on apoptosis was determined, separately and in combination. Combined treatment of cells with paclitaxel and oxaliplatin resulted in significantly higher cytotoxicity as compared to individual single drug treatment. Cytotoxicity was prominent in paclitaxel to oxaliplatin (pacl-oxal) sequence treatment with an approximate two-fold increase in apoptosis as compared to oxaliplatin to paclitaxel (oxal-pacl) sequence treatment. Paclitaxel treatment also caused increased survivin expression showing reduced apoptosis at low concentration. Oxaliplatin, when combined with paclitaxel, decreased the survivin level with increased cell death. Inhibition of survivin by a small interfering RNA (siRNA) method also increased the sensitivity of the cancer cell lines to paclitaxel whereas over-expression of survivin in the transfected 293-cell line provided resistance. In conclusion, the interaction between drugs was synergistic and schedule-dependent. Survivin played a critical role in paclitaxel resistance through the suppression of apoptosis, and a significant induction of apoptosis was observed when oxaliplatin was combined with paclitaxel at least in part by the down-regulation of survivin.
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Nishikawa M, Owaki H, Fuji T, Soliman MM, Ashcroft DM, Watson KD, Lunt M, Symmons D, Hyrich KL, Atkinson F, Malik S, Heycock C, Saravanan V, Rynne M, Hamilton J, Kelly C, Burmester G, Kary S, Unnebrink K, Guerette B, Oezer U, Kupper H, Dennison E, Jameson K, Hyrich K, Watson K, Landewe R, Keystone E, Smolen J, Goldring M, Guerette B, Patra K, Cifaldi M, van der Heijde D, Lloyd LA, Owen C, Breslin A, Ahmad Y, Emery P, Matteson EL, Genovese M, Sague S, Hsia EC, Doyle MK, Fan H, Elashoff M, Kirkham B, Wasco MC, Bathon J, Hsia EC, Fleischmann R, Genovese MC, Matteson EL, Liu H, Fleischmann R, Goldman J, Leirisalo-Repo M, Zanetakis E, El-Kadi H, Kellner H, Bolce R, Wang J, Dehoratius R, Decktor D, Kremer J, Taylor P, Mendelsohn A, Baker D, Kim L, Ritchlin C, Taylor P, Mariette X, Matucci Cerenic M, Pavelka K, van Vollenhoven R, Heatley R, Walsh C, Lawson R, Reynolds A, Emery P, Iaremenko O, Mikitenko G, Smolen J, van Vollenhoven R, Kavanaugh A, Luijtens K, van der Heijde D, Curtis J, van der Heijde D, Schiff M, Keystone E, Landewe R, Kvien T, Curtis J, Khanna D, Luijtens K, Furst D, Behrens F, Koehm M, Scharbatke EC, Kleinert S, Weyer G, Tony HP, Burkhardt H, Blunn KJ, Williams RB, Young A, McDowell J, Keystone E, Weinblatt M, Haraoui B, Guerette B, Mozaffarian N, Patra K, Kavanaugh A, Khraishi M, Alten R, Gomez-Reino J, Rizzo W, Schechtman J, Kahan A, Vernon E, Taylor M, Smolen J, Hogan V, Holweg C, Kummerfeld S, Teng O, Townsend M, van Laar JM, Gullick NJ, De Silva C, Kirkham BW, van der Heijde D, Landewe R, Guerette B, Roy S, Patra K, Keystone E, Emery P, Fleischmann R, van der Heijde D, Keystone E, Genovese MC, Conaghan PG, Hsia EC, Xu W, Baratelle A, Beutler A, Rahman MU, Nikiphorou E, Kiely P, Walsh DA, Williams R, Young A, Shah D, Knight GD, Hutchinson DG, Dass S, Atzeni F, Vital EM, Bingham SJ, Buch M, Beirne P, Emery P, Keystone E, Fleischmann R, Emery P, Dougados M, Williams S, Reynard M, Blackler L, Gullick NJ, Zain A, Oakley S, Rees J, Jones T, Mistlin A, Panayi G, Kirkham BW, Westhovens R, Durez P, Genant H, Robles M, Becker JC, Covucci A, Bathon J, Genovese MC, Schiff M, Luggen M, Le Bars M, Becker JC, Aranda R, Li T, Elegbe A, Dougados M, Smolen J, van Vollenhoven R, Kavanaugh A, Fichtner A, Strand V, Vencovsky J, van der Heijde D, Davies R, Galloway J, Watson KD, Lunt M, Hochberg M, Westhovens R, Aranda R, Kelly S, Khan N, Qi K, Pappu R, Delaet I, Luo A, Torbeyns A, Moreland L, Cohen R, Gujrathi S, Weinblatt M, Bykerk VP, Alvaro-Gracia J, Andres Roman Ivorra J, Nurmohamed MT, Pavelka K, Bernasconi C, Stancati A, Sibilia J, Ostor A, Strangfeld A, Eveslage M, Listing J, Herzer P, Liebhaber A, Krummel-Lorenz B, Zink A, Haraoui B, Emery P, Mozaffarian N, Guerette B, Kupper H, Patra K, Keystone E, Genovese MC, Breedveld FC, Emery P, Cohen SB, Keystone E, Matteson EL, Burke L, Chai A, Reiss W, Sweetser M, Shaw T, Ellis SD, Ehrenstein MR, Notley CA, Yazici Y, Curtis J, Ince A, Baraf H, Malamet R, Chung CY, Kavanaugh A, Hughes C, Faurholm B, Dell'Accio F, Manzo A, Seed M, Eltawil N, Marrelli A, Gould D, Subang C, Al-Kashi A, De Bari C, Winyard P, Chernajovsky Y, Nissim A, van Vollenhoven R, Emery P, Bingham C, Keystone E, Fleischmann RM, Furst DE, Macey KM, Sweetser MT, Lehane P, Farmer P, Long SG, Kremer JM, Furst DE, Burgos-Vargas R, Dudler J, Mela CM, Vernon E, Fleischmann RM, Wegner N, Lugli H, Quirke AM, Guo Y, Potempa J, Venables P. Rheumatoid arthritis - treatment: 180. Utility of Body Weight Classified Low-Dose Leflunomide in Japanese Rheumatoid Arthritis. Rheumatology (Oxford) 2011. [DOI: 10.1093/rheumatology/ker031] [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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Watson EK, Turner D, Adams E, Boulton M, Harrison S, Khan N, Rose P, Ward A. The supportive care needs of the partners and family members of long-term survivors of breast, colorectal and prostate cancer. BMJ Support Palliat Care 2011. [DOI: 10.1136/bmjspcare-2011-000020.16] [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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Khan N, Islam MM, Mahmood S, Hossain GA, Chakraborty RK. 18F-fluorodeoxyglucose uptake in tumor. Mymensingh Med J 2011; 20:332-342. [PMID: 21522112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The 18fluorine-fluorodeoxyglucose (18F-FDG), a glucose analog, has been widely used in tumor imaging. The tumoral uptake of 18F-FDG is based upon enhanced glycolysis. Following administration, 18F-FDG is phosphorylated and trapped intracellularly that forms the basis of PET imaging. An important mechanism to transport 18F-FDG into the tumor cell is based upon the action of glucose transporter proteins; furthermore, highly active hexokinase bound to tumor mitochondria helps to trap 18F-FDG into the cell. In addition, enhanced 18F-FDG uptake may be due to relative hypoxia in tumor masses, which activates the anaerobic glycolytic pathway. In spite of these processes, 18F-FDG uptake is relatively nonspecific since all living cells need glucose. Clinical application of 18F-FDG imaging is therefore recommended in carefully selected patients.
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Teo M, Mayer NJ, Khan N, Sweeney JP, O'Reilly S, Power DG. Influence of body mass index (BMI) on PSA kinetics in castrate-resistant prostate cancer (CRPC). J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.7_suppl.209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
209 Background: Understanding of the role of host energetics in cancer outcomes has been increasing in recent years. In early stage prostate cancer trials obesity is associated with worse outcome. Its effect on treatment response and survival in advanced disease is largely unexplored. We sought to explore the relationship between BMI, the most validated measure of obesity, and biochemical response as well as overall survival in patients receiving first-line chemotherapy. Methods: We reviewed a prospectively-maintained institutional database identifying patients who received docetaxel (D) for CRPC. Demographics and PSA levels during treatment were extracted. Pts were divided into 2 BMI groups (> and < 30 kg/m2). We calculated biochemical responses as per historically validated surrogates: PSA decrease > 30% at 3months; overall decrease > 50%; time to PSA nadir and PSA half-life after 4 cycles, for each group. Results were compared with unpaired t-test and chi-square test. Results: 33 pts were identified between June ‘04 and Sept ‘10, 16 pts with BMI > 30 (hBMI) (range 30.1-34.2) and 17 with BMI < 30 (nBMI) (21.5-29.6). Median age for the entire cohort was 67.9 yrs (47.7-79.8), median Gleason score 8, median cycles of D received was 6 (3-20) with median duration of 3.7 months (1.4-8.7), p>0.05. Baseline PSA was 89.1 ng/ml (0.34-417) and 259.2 (16.1-1,589) for hBMI and nBMI respectively, p = 0.023. For hBMI group, only 56.3% (9/16) of patients demonstrated biochemical response, compared with 88.2% (15/17) in nBMI group(p = 0.039). Of the biochemical responders, 6/16 (38%) of hBMI and 9/7 (53%) of nBMI achieved >50% fall in PSA (p = 0.743) while 8/16 (50%) patients in hBMI group and 10/17 (59%) in nBMI group had a PSA drop >30% at 3 months (p = 0.61); Median time to PSA nadir was 3.4 months (0.7-4.9) and 2.7 (0.7-7.5), and median PSA half life was 56.4 days (16-138) and 46.1 days (16-302) for hBMI and nBMI groups, respectively, p > 0.05. Conclusions: Obese patients with CRPC have lower pre-D PSA levels. However, they also experience a lower rate of biochemical response to therapy. PSA kinetics in biochemical responders do not appear to be influenced by BMI. Survival data will be presented. No significant financial relationships to disclose.
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Hajek M, Khan N, Leenders K, Wieser H. Temporal lobe epilepsy with bilateral seizure origin studied by [18F]FDG-positron emission tomography. Eur J Neurol 2011; 2:211-7. [DOI: 10.1111/j.1468-1331.1995.tb00120.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Alsinnawi M, Quinlan M, Brady A, Khan N. An unusual pelvic mass: bladder lymphoma. JBR-BTR : ORGANE DE LA SOCIETE ROYALE BELGE DE RADIOLOGIE (SRBR) = ORGAAN VAN DE KONINKLIJKE BELGISCHE VERENIGING VOOR RADIOLOGIE (KBVR) 2011; 94:40. [PMID: 21466068 DOI: 10.5334/jbr-btr.489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
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Khan N, Ismail F, Van de Werke I, Gongxeka H. Mermaid baby. SA J Radiol 2010. [DOI: 10.4102/sajr.v14i3.473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
We were recently intrigued by a baby born at Kalafong Hospital with fused lower extremities resembling a mermaid, which caused us to search for the background and origin of this entity called sirenomelia.
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Khan N, Dicker D, Flaherty KT, Lerner J, El-Deiry W. Hyperspectral imaging: A noninvasive in vivo method of imaging melanoma lesions in a patient being treated with a novel B-RAF inhibitor. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e19019] [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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Sahu D, Pradhan J, Jayachandran V, Khan N. Why immunization coverage fails to catch up in India? A community-based analysis. Child Care Health Dev 2010; 36:332-9. [PMID: 19735269 DOI: 10.1111/j.1365-2214.2009.01003.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND An effort has been made in this paper to examine the impact of community and household vis-à-vis individual-level variables on immunization coverage among Indian children. METHODS National Family Health Survey-2 data set has been used for the analysis. Multilevel regression analyses have been used to explore the relative effects of community-, household- and individual-level factors on immunization coverage. Three community-level variables, i.e. availability of health facilities, availability of all-weather roads and information, education and communication (IEC) activities conducted during last year, are included in this analysis. RESULTS Availability of health facility and information, education and communication activities plays a significant role in determining the level of immunization coverage among children. Even with community-level variables in the model, individual-level variables, i.e. parent's education, birth order of child and number of antenatal care visits, retain their predictive role for the potential immunization coverage. CONCLUSIONS Universal immunization can be achieved by providing services at community level and information about the available services and their benefits to the community. There is a considerable, unexplained variation in the immunization coverage between different communities, even in the most complex model used in this study, which could explain the entire heterogeneity of immunization coverage among Indian states.
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Alver B, Back BB, Baker MD, Ballintijn M, Barton DS, Betts RR, Bickley AA, Bindel R, Busza W, Carroll A, Chai Z, Decowski MP, García E, Gburek T, George N, Gulbrandsen K, Halliwell C, Hamblen J, Hauer M, Henderson C, Hofman DJ, Hollis RS, Hołyński R, Holzman B, Iordanova A, Johnson E, Kane JL, Khan N, Kulinich P, Kuo CM, Li W, Lin WT, Loizides C, Manly S, Mignerey AC, Nouicer R, Olszewski A, Pak R, Reed C, Roland C, Roland G, Sagerer J, Seals H, Sedykh I, Smith CE, Stankiewicz MA, Steinberg P, Stephans GSF, Sukhanov A, Tonjes MB, Trzupek A, Vale C, van Nieuwenhuizen GJ, Vaurynovich SS, Verdier R, Veres GI, Walters P, Wenger E, Wolfs FLH, Wosiek B, Woźniak K, Wysłouch B. Event-by-event fluctuations of azimuthal particle anisotropy in Au+Au collisions at square root(sNN) = 200 GeV. PHYSICAL REVIEW LETTERS 2010; 104:142301. [PMID: 20481933 DOI: 10.1103/physrevlett.104.142301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2010] [Indexed: 05/29/2023]
Abstract
This Letter presents the first measurement of event-by-event fluctuations of the elliptic flow parameter v(2) in Au+Au collisions at square root(s(NN))=200 GeV as a function of collision centrality. The relative nonstatistical fluctuations of the v(2) parameter are found to be approximately 40%. The results, including contributions from event-by-event elliptic flow fluctuations and from azimuthal correlations that are unrelated to the reaction plane (nonflow correlations), establish an upper limit on the magnitude of underlying elliptic flow fluctuations. This limit is consistent with predictions based on spatial fluctuations of the participating nucleons in the initial nuclear overlap region. These results provide important constraints on models of the initial state and hydrodynamic evolution of relativistic heavy ion collisions.
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Alver B, Back BB, Baker MD, Ballintijn M, Barton DS, Betts RR, Bickley AA, Bindel R, Busza W, Carroll A, Chai Z, Chetluru V, Decowski MP, García E, Gburek T, George N, Gulbrandsen K, Halliwell C, Hamblen J, Hauer M, Henderson C, Hofman DJ, Hollis RS, Hołyński R, Holzman B, Iordanova A, Johnson E, Kane JL, Khan N, Kulinich P, Kuo CM, Li W, Lin WT, Loizides C, Manly S, Mignerey AC, Nouicer R, Olszewski A, Pak R, Reed C, Roland C, Roland G, Sagerer J, Seals H, Sedykh I, Smith CE, Stankiewicz MA, Steinberg P, Stephans GSF, Sukhanov A, Tonjes MB, Trzupek A, Vale C, van Nieuwenhuizen GJ, Vaurynovich SS, Verdier R, Veres GI, Walters P, Wenger E, Wolfs FLH, Wosiek B, Woźniak K, Wysłouch B. High transverse momentum triggered correlations over a large pseudorapidity acceptance in Au + Au collisions at square root(s(NN)) = 200 GeV. PHYSICAL REVIEW LETTERS 2010; 104:062301. [PMID: 20366815 DOI: 10.1103/physrevlett.104.062301] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2009] [Revised: 12/24/2009] [Indexed: 05/29/2023]
Abstract
A measurement of two-particle correlations with a high transverse momentum trigger particle (p(T)(trig) > 2.5 GeV/c) is presented for Au+Au collisions at square root(s(NN)) = 200 GeV over the uniquely broad longitudinal acceptance of the PHOBOS detector (-4 < Delta eta < 2). A broadening of the away-side azimuthal correlation compared to elementary collisions is observed at all Delta eta. As in p+p collisions, the near side is characterized by a peak of correlated partners at small angle relative to the trigger particle. However, in central Au+Au collisions an additional correlation extended in Delta eta and known as the "ridge" is found to reach at least |Delta eta| approximately = 4. The ridge yield is largely independent of Delta eta over the measured range, and it decreases towards more peripheral collisions. For the chosen (p(T)(trig) cut, the ridge yield is consistent with zero for events with less than roughly 100 participating nucleons.
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Ansari M, Zubair S, Atif S, Kashif M, Khan N, Rehan M, Anwar T, Iqbal A, Owais M. Identification and Characterization of Molten Globule-Like State of Hen Egg-White Lysozyme in Presence of Salts Under Alkaline Conditions. Protein Pept Lett 2010; 17:11-7. [DOI: 10.2174/092986610789909502] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Cazzaniga M, Gheit T, Casadio C, Khan N, Macis D, Valenti F, Miller MJ, Sylla BS, Akiba S, Bonanni B, Decensi A, Veronesi U, Tommasino M. Analysis of the presence of cutaneous and mucosal papillomavirus types in ductal lavage fluid, milk and colostrum to evaluate its role in breast carcinogenesis. BMC Proc 2009. [PMCID: PMC2727114 DOI: 10.1186/1753-6561-3-s5-s5] [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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Doloff JC, Khan N, Ma J, Demidenko E, Swartz HM, Jounaidi Y. Increased tumor oxygenation and drug uptake during anti-angiogenic weekly low dose cyclophosphamide enhances the anti-tumor effect of weekly tirapazamine. Curr Cancer Drug Targets 2009; 9:777-88. [PMID: 19754361 DOI: 10.2174/156800909789271503] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Metronomic cyclophosphamide treatment is associated with anti-angiogenic activity and is anticipated to generate exploitable hypoxia using hypoxia-activated prodrugs. Weekly administration of tirapazamine (TPZ; 5 mg/kg body weight i.p.) failed to inhibit the growth of 9L gliosarcoma tumors grown s.c. in scid mice. However, the anti-tumor effect of weekly cyclophosphamide (CPA) treatment (140 mg/kg BW i.p.) was substantially enhanced by weekly TPZ administration. An extended tumor free period and increased frequency of tumor eradication without overt toxicity were observed when TPZ was given 3, 4 or 5 days after each weekly CPA treatment. Following the 2(nd) CPA injection, Electron Paramagnetic Resonance (EPR) Oximetry indicated significant increases in tumor pO(2), starting at 48 hr, which further increased after the 3(rd) CPA injection. pO(2) levels were, however, stable in growing untreated tumors. A strong negative correlation (-0.81) between tumor pO(2) and tumor volume during 21 days of weekly CPA chemotherapy was observed, indicating increasing tumor pO(2) with decreasing tumor volume. Furthermore, CPA treatment resulted in increased tumor uptake of activated CPA. CPA induced increases in VEGF RNA, which reached a maximum on day 1, and in PLGF RNA which was sustained throughout the treatment, while anti-angiogenic host thrombospondin-1 increased dramatically through day 7 post-CPA treatment. Weekly cyclophosphamide treatment was anticipated to generate exploitable hypoxia. However, our findings suggest that weekly CPA treatment induces a functional improvement of tumor vasculature, which is characterized by increased tumor oxygenation and drug uptake in tumors, thus counter-intuitively, benefiting intratumoral activation of TPZ and perhaps other bioreductive drugs.
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Umar N, Khan N, Ardo A. O958 Barriers to acceptance of assisted reproductive techniques (ART) in Northern Nigeria. A single centre experience. Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)61331-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Ravi S, Darwis Y, Khan N. Development and validation of an RP-HPLC-UV method for analysis of sumatriptan succinate in pharmaceutical dosage forms. ACTA CHROMATOGR 2009. [DOI: 10.1556/achrom.21.2009.3.6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Aibin Yu, Khan N, Archit G, Pinjala D, Kok Chuan Toh, Kripesh V, Seung Wook Yoon, Lau J. Fabrication of Silicon Carriers With TSV Electrical Interconnections and Embedded Thermal Solutions for High Power 3-D Packages. ACTA ACUST UNITED AC 2009. [DOI: 10.1109/tcapt.2009.2012719] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Sharma S, Khan N, Khadri A, Julies P, Gnanasambandam S, Saroey S, Jacobs B, Beski S, Coren M, Alexander S. Vitamin D in pregnancy-time for action: a paediatric audit. BJOG 2009; 116:1678-82. [PMID: 19681853 DOI: 10.1111/j.1471-0528.2009.02285.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Maternal vitamin D deficiency is a significant public health issue. This retrospective multicentre audit was undertaken to identify the scale of maternal vitamin D deficiency in London, using infant vitamin D deficiency as a surrogate marker. During January 2006 to June 2008, 74 infants presented with symptomatic vitamin D deficiency, a prevalence of 1.6 per 1000 deliveries in London. Of these, 49% were hypocalcaemic at presentation and 27% had hypocalcaemic seizures. A telephone survey in June 2008 showed that no London National Health Service antenatal units had departmental guidelines on vitamin D. This audit is presented to raise awareness of current recommendations and the sequelae of maternal vitamin D deficiency.
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Khan N, Parsai E, Feldmeier J, Shvydka D. SU-FF-T-49: Investigating Radiation Properties of a New Radioactive Seed for Concurrent Brachytherapy and Hyperthermia Treatments: A Monte Carlo Study. Med Phys 2009. [DOI: 10.1118/1.3181521] [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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Chidrawar S, Khan N, Wei W, McLarnon A, Smith N, Nayak L, Moss P. Cytomegalovirus-seropositivity has a profound influence on the magnitude of major lymphoid subsets within healthy individuals. Clin Exp Immunol 2009; 155:423-32. [PMID: 19220832 DOI: 10.1111/j.1365-2249.2008.03785.x] [Citation(s) in RCA: 197] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Cytomegalovirus (CMV) infects most individuals and elicits a strong CMV-specific immune response. We have studied the influence of CMV-seropositivity on the size of lymphoid subsets in healthy donors and demonstrate that the virus substantially modulates the peripheral lymphoid pool. CD8(+) T cell numbers are increased in all CMV-seropositive individuals because of a striking 60% increment in the CD8(+) T cell memory pool. The CD45RA(+) resting memory pool is doubled after CMV infection and increases further with age. The magnitude of the naïve CD8(+) T cell pool is dramatically reduced in CMV-seropositive individuals at all ages, and this accelerates the physiological decline by approximately 40 years. The number of CD4(+) effector memory T cells is increased in CMV-seropositive individuals and is differentially accommodated by a reduction in the number of naïve and central memory CD4(+) T cells in young and elderly donors respectively. CMV-seropositivity also increases the total number of B cells in older donors and suppresses the number of CD5(+) B cells. These data reveal that CMV has a profound influence on the immune system of all healthy individuals and add to growing concern regarding the clinical and immunomodulatory significance of CMV infection in healthy donors.
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Holmes MV, Atabani SF, Khan N, Steiner K, Haque T, Slapak G. A case for varicella vaccination in the immunosuppressed. CASE REPORTS 2009; 2009:bcr07.2008.0461. [DOI: 10.1136/bcr.07.2008.0461] [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] Open
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Zafar U, Khan N, Afroz N, Hasan SA. Clinicopathological study of non-neoplastic lesions of nasal cavity and paranasal sinuses. INDIAN J PATHOL MICR 2008; 51:26-9. [PMID: 18417845 DOI: 10.4103/0377-4929.40386] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
An analysis of cases presenting as mass in nasal cavity (NC), paranasal sinuses (PNS), and nasopharynx (NP) was done over a period of 7 years in Jawaharlal Nehru Medical College, Aligarh. A provisional diagnosis was made after clinical assessment and radiological investigations, but final diagnosis was made after histopathological examination. The incidence of masses in NC, PNS, and NP was 34.3 cases per year, non-neoplastic lesions constituted 60% of these cases and their incidence was 20.7 cases per year. All the cases were carefully examined histopathologically and it was found that the region was affected by a variety of non-neoplastic lesions. Among 240 cases, 145 were non-neoplastic and 95 were neoplastic The lesions in the decreasing order of frequency were - nasal polyp, rhinoscleroma, tuberculosis, fungal infection, fibrous dysplasia, ossifying fibroma, cysts, nasal glioma, and cemento-ossifying fibroma. NP was involved by a range of neoplastic lesions; however, no non-neoplastic lesion was seen in this region.
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Boucek JA, Francis RJ, Jones CG, Khan N, Turlach BA, Green AJ. Assessment of tumour response with18F-fluorodeoxyglucose positron emission tomography using three-dimensional measures compared to SUVmax—a phantom study. Phys Med Biol 2008; 53:4213-30. [DOI: 10.1088/0031-9155/53/16/001] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Otani N, Fujioka M, Oracioglu B, Muroi C, Khan N, Roth P, Yonekawa Y. Thalamic cavernous angioma: paraculminar supracerebellar infratentorial transtentorial approach for the safe and complete surgical removal. CHANGING ASPECTS IN STROKE SURGERY: ANEURYSMS, DISSECTIONS, MOYAMOYA ANGIOPATHY AND EC-IC BYPASS 2008; 103:29-36. [DOI: 10.1007/978-3-211-76589-0_7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
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Krayenbühl N, Khan N, Cesnulis E, Imhof HG, Yonekawa Y. Emergency extra-intracranial bypass surgery in the treatment of cerebral aneurysms. CHANGING ASPECTS IN STROKE SURGERY: ANEURYSMS, DISSECTIONS, MOYAMOYA ANGIOPATHY AND EC-IC BYPASS 2008; 103:93-101. [DOI: 10.1007/978-3-211-76589-0_17] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Rabi DM, Khan N, Vallee M, Hladunewich MA, Tobe SW, Pilote L. Reporting on sex-based analysis in clinical trials of angiotensin-converting enzyme inhibitor and angiotensin receptor blocker efficacy. Can J Cardiol 2008; 24:491-6. [PMID: 18548147 DOI: 10.1016/s0828-282x(08)70624-x] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Clinical practice recommendations for hypertension do not make recommendations specific to men or women. However, the sex hormones appear to modulate differently the renin-angiotensin system (RAS), which plays a central role in the regulation of blood pressure. Today, little is known about the effects of sex on the efficacy of therapies that antagonize the RAS, such as angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin receptor blockers (ARBs). OBJECTIVE To identify randomized controlled trials evaluating the efficacy of ACEIs and ARBs in preventing major cardiovascular outcomes, determine what proportion of the trial participants were female, and evaluate whether there was any evidence of a sex difference in the efficacy of these agents. METHODS A systematic review of the literature was conducted to identify randomized controlled trials that used either ACEIs or ARBs for the treatment of hypertension. RESULTS Thirteen ACEI trials and nine ARB trials were identified. Sex-specific outcome data were available in six of the ACEI trials and three of the ARB trials. These trials enrolled 74,105 patients; 39.1% were women. Seven of the nine trials indicated that ACEIs or ARBs may be slightly more beneficial in men. The magnitude of these differences, in most trials, was small. CONCLUSIONS Sex-specific data are reported in 43% of large hypertension clinical trials. Review of the trials reporting sex-specific effect sizes indicates that ACEIs and ARBs may be more effective in men.
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Andres-Lacueva C, Monagas M, Khan N, Izquierdo-Pulido M, Urpi-Sarda M, Permanyer J, Lamuela-Raventós RM. Flavanol and flavonol contents of cocoa powder products: influence of the manufacturing process. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:3111-3117. [PMID: 18412367 DOI: 10.1021/jf0728754] [Citation(s) in RCA: 129] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Major brands of cocoa powder products present in the Spanish market were analyzed for monomeric flavanols [(+)-catechin and (-)-epicatechin] and flavonols [quercetin-3-glucuronide, quercetin-3-glucoside (isoquercitrin), quercetin-3-arabinoside, and quercetin]. In addition, the influence of the manufacturing process of cocoa powder products, in particular, the alkalinization treatment ( Dutching), on the original content of these flavonoids has been studied. (-)-Epicatechin was in the range of 116.02-730.26 microg/g, whereas (+)-catechin was in the range of 81.40-447.62 microg/g in the commercial cocoa products studied. Among flavonols, quercetin-3-arabinoside and isoquercitrin were the major flavonols in the cocoa powder products studied, ranging from 2.10 to 40.33 microg/g and from 3.97 to 42.74 microg/g, respectively, followed by quercetin-3-glucuronide (0.13-9.88 microg/g) and quercetin aglycone (0.28-3.25 microg/g). To our knowledge, these results are the first quantitative data in relation to the content of individualized flavonol derivatives in commercial cocoa powder products. The alkalinization treatment resulted in 60% loss of the mean total flavonoid content. Among flavanols, (-)-epicatechin presented a larger decline (67%, as a mean percentage difference) than (+)-catechin (38%), probably because of its epimerization into (-)-catechin, a less bioavailable form of catechin. A decline was also confirmed for di-, tri-, and tetrameric procyanidins. In the case of flavonols, quercetin presented the highest loss (86%), whereas quercetin-3-glucuronide, quercetin-3-arabinoside, and isoquercitrin showed a similar decrease (58, 62, and 61%, respectively). It is concluded that the large decrease found in the flavonoid content of natural cocoa powder, together with the observed change in the monomeric flavanol profile that results from the alkalinization treatment, could affect the antioxidant properties and the polyphenol biovailability of cocoa powder products.
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Khan N, Shastri J, Aigal U, Doctor B. Resurgence of diphtheria in the vaccination era. Indian J Med Microbiol 2008; 25:434. [PMID: 18087111 DOI: 10.4103/0255-0857.37367] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Ahmed R, Khan N, Ellemdin S, Gayaparsad K. Ultrasound - first imaging modality in the detection of parathyroid adenomas. SA J Radiol 2008. [DOI: 10.4102/sajr.v12i3.558] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Abstract We present a series of 12 patients in whom the typical ultrasound features of parathyroid adenomas were accurately demonstrated. High resolution ultrasound [in experienced hands] is a highly sensitive accurate, safe and non invasive method of localizing parathyroid adenomas especially in patients with typically located glands and an absence of thyroid pathology. Our aim was to compare ultrasound with nuclear medicine as an imaging gold standard in patients with thyroid adenomas.
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Millwaters M, Khan N, Halfpenny W. Simultaneous lymphoma and squamous cell carcinoma presenting as a neck lump. Br J Oral Maxillofac Surg 2008; 46:144-5. [PMID: 17321646 DOI: 10.1016/j.bjoms.2006.12.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/03/2006] [Indexed: 10/23/2022]
Abstract
We describe the unusual presentation of a patient with simultaneous follicular lymphoma and metastatic head and neck squamous cell carcinoma. He was initially treated for his lymphoma and then, following no regression in his cervical lymphadenopathy was referred for further assessment. This revealed squamous cell carcinoma arising from the left tongue base with metastatic disease in the left neck.
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Al Saleh J, El Sayed M, Jassim V, Mohammed N, Khan N. Hypothyroidism determines the clinical and immunological manifestations of Arabs with lupus. Lupus 2008; 17:215-20. [DOI: 10.1177/0961203307086933] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract Data on thyroid disease in Arabs with lupus is scarce. We conducted a cross-sectional and retrospective case–control study to report the prevalence of thyroid diseases in 110 Arabs with lupus who attended our Rheumatology Clinic between January 2002 and January 2007, and to delineate the clinical and immunological features of Arabs lupus patients with thyroid diseases. We found hypothyroidism in 15 (13.7%) patients. Overall, 25.6% had elevated thyroid peroxidase antibodies, 14.6% had elevated anti-thyroglobulin antibodies, and 13.7% were positive for both antibodies. Lupus patients with hypothyroidism had a significantly higher frequency of polyarthritis (OR = 9.3, CI: 2.0–41.7, P < 0.001), cutaneous manifestations (OR = 5.6, CI: 2.4–14.3, P < 0.0001), positive anti-thyroglobulin antibodies (OR = 19.9, CI: 8.38–47.4, P < 0.0001), and thyroid peroxidase antibodies (OR = 12.3, CI: 6.27–24.1, P < 0.0001) than lupus patients with normal thyroid function. Furthermore, neuropsychiatric (OR = 0.36, CI: 0.14–0.93, P < 0.05) and hematological (OR = 0.52, CI: 0.29–0.91, P < 0.05) manifestations were significantly lower in patients with hypothyroidism than in euthyroid patients. Surprisingly, the prevalence of anticardiolipin antibody immunoglobulin G (aCL IgG) (OR = 0.34, CI: 0.13–0.86, P < 0.05), lupus anticoagulant (OR = 0.02, CI: 0.001–0.35, P < 0.0001), and anticardiolipin syndrome (OR = 0.02, CI: 0.001–0.43, P < 0.0001) were significantly lower in lupus patients with hypothyroidism than in lupus patients with normal thyroid function. In conclusion, the prevalence of hypothyroidism in Arabs with lupus is comparable to that reported in the literature. Arab lupus patients with hypothyroidism have distinctive clinical and immunological features that differentiate them from euthyroid patients.
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