76
|
Mokin M, Masud M, Dumont T, Kass-Hout T, Snyder K, Siddiqui A, Levy E. O-028 Outcomes in Patients with Acute Ischaemic Stroke from Proximal Intracranial Vessel Occlusion and NIHSS Score Below 8. J Neurointerv Surg 2013. [DOI: 10.1136/neurintsurg-2013-010870.28] [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]
|
77
|
Frei D, Siddiqui A, Nogueira R, Mualem E, Sit S, Bose A. E-045 A Randomised, Concurrent Controlled Trial to Assess the Safety and Effectiveness of the Penumbra Separator 3D as a Component of the Penumbra System in Acute Stroke Treatment. J Neurointerv Surg 2013. [DOI: 10.1136/neurintsurg-2013-010870.103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
78
|
Ionita C, Bednarek D, Dumont T, Siddiqui A, Levy E, Snyder K, Rudin S. TU-A-116-06: Pre and Post-Treatment Temporal Parametric Analysis of Neurovascular Disease Using Gamma Variate Fitting of Time Density Curves From DSA Sequences. Med Phys 2013. [DOI: 10.1118/1.4815353] [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
|
79
|
Meng H, Tutino VM, Xiang J, Siddiqui A. High WSS or low WSS? Complex interactions of hemodynamics with intracranial aneurysm initiation, growth, and rupture: toward a unifying hypothesis. AJNR Am J Neuroradiol 2013; 35:1254-62. [PMID: 23598838 DOI: 10.3174/ajnr.a3558] [Citation(s) in RCA: 547] [Impact Index Per Article: 49.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
SUMMARY Increasing detection of unruptured intracranial aneurysms, catastrophic outcomes from subarachnoid hemorrhage, and risks and cost of treatment necessitate defining objective predictive parameters of aneurysm rupture risk. Image-based computational fluid dynamics models have suggested associations between hemodynamics and intracranial aneurysm rupture, albeit with conflicting findings regarding wall shear stress. We propose that the "high-versus-low wall shear stress" controversy is a manifestation of the complexity of aneurysm pathophysiology, and both high and low wall shear stress can drive intracranial aneurysm growth and rupture. Low wall shear stress and high oscillatory shear index trigger an inflammatory-cell-mediated pathway, which could be associated with the growth and rupture of large, atherosclerotic aneurysm phenotypes, while high wall shear stress combined with a positive wall shear stress gradient trigger a mural-cell-mediated pathway, which could be associated with the growth and rupture of small or secondary bleb aneurysm phenotypes. This hypothesis correlates disparate intracranial aneurysm pathophysiology with the results of computational fluid dynamics in search of more reliable risk predictors.
Collapse
|
80
|
Toby M, Siddiqui A, Kulasegaram R. Unmasking of progressive multifocal leukoencephalopathy in a patient with HIV-2. Int J STD AIDS 2012; 23:827-9. [PMID: 23155106 DOI: 10.1258/ijsa.2012.012057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
HIV-2 is common in West Africa but rarely found in developed countries. It usually has a milder disease course than HIV-1 and clinical presentations of neurological syndromes in HIV-2 are extremely rare. We report a case of a HIV-2-infected, 46-year-old woman originally from Cote d'Ivoire who presented with possible intracerebral toxoplasmosis infection then developed progressive multifocal leukoencephalopathy.
Collapse
|
81
|
Baird AL, Coogan AN, Siddiqui A, Donev RM, Thome J. Adult attention-deficit hyperactivity disorder is associated with alterations in circadian rhythms at the behavioural, endocrine and molecular levels. Mol Psychiatry 2012; 17:988-95. [PMID: 22105622 DOI: 10.1038/mp.2011.149] [Citation(s) in RCA: 140] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2011] [Revised: 09/13/2011] [Accepted: 10/06/2011] [Indexed: 11/09/2022]
Abstract
Attention-deficit hyperactivity disorder (ADHD) in adults is associated with impaired sleep, and it has been postulated that this impairment may contribute to the psychopathology of this common condition. One key driver of sleep/wake cycles is the circadian system, which at the molecular level consists of a series of transcriptional feedback loops of clock genes, which in turn produce endocrine, physiological and behavioural outputs with a near 24 h periodicity. We set out to examine circadian rhythms at the behavioural, endocrine and molecular levels in ADHD. Adults with ADHD as well as age- and sex-matched controls were recruited. Circadian rhythms were measured by means of actigraphy for the determination of gross motor patterns, by self-sampling of oral mucosa for assessment of rhythmic expression of the clock genes BMAL1 and PER2, and by estimation of salivary cortisol and melatonin levels. Actigraphic analysis revealed significant diurnal and nocturnal hyperactivity in the ADHD group, as well as a significant shorter period of best fit for the locomotor circadian rhythm in ADHD. BMAL1 and PER2 showed circadian rhythmicity in controls with this being lost in the ADHD group. Cortisol rhythms were significantly phase delayed in the ADHD group. These findings indicate that adult ADHD is accompanied by significant changes in the circadian system, which in turn may lead to decreased sleep duration and quality in the condition. Further, modulation of circadian rhythms may represent a novel therapeutic avenue in the management of ADHD.
Collapse
|
82
|
Sood R, Kumar M, Bhatia S, Pateriya AK, Khandia R, Siddiqui A, Kulkarni DD, Kumar S, Venkatesha MD. Ovine herpesvirus type 2 infection in captive bison in India. Vet Rec 2012; 170:654. [PMID: 22730503 DOI: 10.1136/vr.e4291] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
83
|
Mokin M, Kass-Hout T, Kass-Hout O, Dumont T, Kan P, Snyder K, Siddiqui A, Levy E. E-074 Intravenous thrombolysis and endovascular therapy for acute ischemic stroke with internal carotid artery occlusion: a systematic review of clinical outcomes. J Neurointerv Surg 2012. [DOI: 10.1136/neurintsurg-2012-010455c.74] [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]
|
84
|
Dumont T, Kass-Hout T, Eller J, Siddiqui A, Levy E. E-078 Acute stroke intervention with solitaire stent: a meta-analysis. J Neurointerv Surg 2012. [DOI: 10.1136/neurintsurg-2012-010455c.78] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
85
|
Kass-Hout T, Kass-Hout O, Mokin M, Al Masry M, Nourollahzadeh E, Siddiqui A, Levy E, Synder K. E-072 Wake up symptomatic stroke in acute brain ischemia (WASSABI) clinical trial. J Neurointerv Surg 2012. [DOI: 10.1136/neurintsurg-2012-010455c.72] [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]
|
86
|
Kass-Hout O, Kass-Hout T, Mokin M, Siddiqui A, Levy E, Synder K. P-045 The role of bridging with intravenous thrombolysis in endovascular therapy of acute ischemic stroke. J Neurointerv Surg 2012. [DOI: 10.1136/neurintsurg-2012-010455b.45] [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]
|
87
|
Eller J, Jahshan S, Dumont T, Kan P, Levy E, Siddiqui A. E-022 Tandem symptomatic internal carotid artery and persistent hypoglossal artery stenosis treated by endovascular stenting and flow reversal: case report: Abstract E-022 Figure 1. J Neurointerv Surg 2012. [DOI: 10.1136/neurintsurg-2012-010455c.22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
88
|
Kass-Hout T, Kass-Hout O, Al Masry M, Mokin M, Wack D, Nourollahzadeh E, Siddiqui A, Levy E, Synder K. E-071 CT perfusion as a tool to predict the risk of hemorrhagic transformation in ischemic stroke treated with tissue plasminogen activator: a single center experience. J Neurointerv Surg 2012. [DOI: 10.1136/neurintsurg-2012-010455c.71] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
89
|
Nourollahzadeh E, Kass-Hout O, Mokin M, Aliotta R, Synder K, Siddiqui A, Levy E, Kass-Hout T. P-046 Correlation between recanalization rate and good clinical outcome in acute ischemic stroke, a meta-analysis. J Neurointerv Surg 2012. [DOI: 10.1136/neurintsurg-2012-010455b.46] [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]
|
90
|
Siddiqui A, Lowe T, McKinlay A. Nutritional assessment of head and neck cancer patients, undergoing surgical treatment: a retrospective study. Br J Oral Maxillofac Surg 2012. [DOI: 10.1016/j.bjoms.2012.04.209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
91
|
Howard RS, Holmes PA, Siddiqui A, Treacher D, Tsiropoulos I, Koutroumanidis M. Hypoxic-ischaemic brain injury: imaging and neurophysiology abnormalities related to outcome. QJM 2012; 105:551-61. [PMID: 22323616 DOI: 10.1093/qjmed/hcs016] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND The outcome for patients with hypoxic-ischaemic brain injury (HIBI) is often poor. It is important to establish an accurate prognosis as soon as possible after the insult to guide management. Clinical assessment is not reliable and ancillary investigations, particularly imaging and EEG, are needed to understand the severity of brain injury and the likely outcome. METHODS We undertook a retrospective study of 39 patients on an intensive therapy unit (ITU) with HIBI who were referred for MRI. The patients were seen consecutively >57 months. HIBI was due to a variety of insults causing cardiac arrest, hypoperfusion or isolated hypoxia. RESULTS The outcome was poor, 29 patients died, 7 were left severely disabled and only 3 made a good recovery. Characteristic imaging changes were seen on MRI. These included extensive changes in the cortex and the deep grey matter present on diffusion-weighted imaging (DWI) and T2-weighted imaging within 6 days of the insult. In other patients, different patterns of involvement of the cortex and basal ganglia occurred. There was no significant difference in the outcome or imaging appearances according to aetiology. A poor prognosis was consistently associated with a non- or poorly responsive EEG rhythm and the presence of periodic generalized phenomena with a very low-voltage background activity. CONCLUSION In this retrospective study of patients with HIBI, MRI and EEG provided valuable information concerning prognosis.
Collapse
|
92
|
Eldeeb H, Mak C, Camilleri P, Siddiqui A. 155 Effect of radiation dose in consolidation radiotherapy for advanced/metastatic non small cell lung cancer. Lung Cancer 2012. [DOI: 10.1016/s0169-5002(12)70156-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
93
|
O'Shaughnessy J, Craig DW, Kiefer J, Sinari S, Moses TM, Wong S, Aldrich J, Christoforides A, Dinh J, Itzatt T, Blum J, Kurdoglu A, Salhia B, Baker A, Siddiqui A, Hoang L, Billings P, Trent JM, Mousses S, Von Hoff D, Carpten JD. S3-5: Next Generation Sequencing Reveals Co-Activating Events in the MAPK and P13K/AKT Pathways in Metastatic Triple Negative Breast Cancers. Cancer Res 2011. [DOI: 10.1158/0008-5472.sabcs11-s3-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
INTRODUCTION: The clinical application of next generation sequencing to comprehensively characterize groups of driving mutations in individual metastatic triple negative breast cancer (mTNBC) genomes has the potential to reveal therapeutically relevant pathway dependencies. Towards this end, we harvested tissue from 14 patients with mTNBC and are conducting deep whole genome and transcriptome sequencing for each case to identify mutations that can guide therapeutic targeting within available phase I/II clinical trials.
METHODS: Metastatic tumor tissue was harvested from 14 mTNBC patients, and 7 samples have undergone total genome and transcriptome sequencing with the others currently underway. We are utilizing the Life Technologies SOLiD® system to sequence germline and tumor DNA to sufficient depth to identify somatic genome alterations including point mutations, indels, and structural events including translocations. Furthermore, RNA-seq is being performed on these tumors, along with a series of age- and ethnicity-matched normal breast controls to perform deep differential expression analysis, isoform expression analysis, and fusion transcript detection. Our team of genome scientists and clinical oncologists are evaluating the sequencing findings and are prioritizing the investigational therapeutic options for each patient.
RESULTS: Our whole genome and transcriptome sequencing study has revealed numerous known and novel mutations in mTNBC. However, all patients’ cancers analyzed to date had alterations that would activate the MAPK pathway, but through various mechanisms in different patients. These include BRAF amplification and overexpression, NF1 homozygous deletion, and consistent IQGAP3 overexpression. Furthermore, all patients’ cancers also harbor mutations that would activate the PI3K/AKT pathway including PTEN homozygous deletion or down-regulation, consistent INPP4B down-regulation, FBXW7 homozygous deletion, and ERAS overexpression. Moreover, although we and others show ERBB4 down-regulation in breast tumors, we are the first to report unique somatic genomic events that significantly alter the ERBB4 locus leading to its loss in the majority (5/7) of our patients’ tumors. Importantly, we are beginning to use these insights to prioritize therapeutic targeting and have observed that one chemotherapy-refractory mTNBC patient, with a high-level BRAF amplification/overexpression along with down-regulation of PTEN and INPP4B, had a major response to combined mek plus akt inhibitors on a phase I study.
CONCLUSIONS: Comprehensive genomic and transcriptomic interrogation of mTNBCs has revealed events supporting co-activation of the MAPK and PI3K/AKT pathways in all the tumors albeit by different mutational mechanisms and supports potential effectiveness of combination therapy in the treatment of mTNBC. We plan to treat these patients with combined mek plus akt inhibitors on a new phase I study beginning in August 2011 to determine the effectiveness of co-inhibition of these pathways based on this frequent genomic context.
Citation Information: Cancer Res 2011;71(24 Suppl):Abstract nr S3-5.
Collapse
|
94
|
Tripathi U, Srivastava N, Safi Ahmed M, Siddiqui A, Dwivedi SK. Synthesis and spectral behavior of nanometric Ti(IV) complexes with nitrogen, sulfur, and oxygen donors. J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.625020] [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]
|
95
|
Malleshappa P, Chaudhari AP, Aghariya M, Siddiqui A, Ranganath R, Shah AB. Thrombotic microangiopathy as a complication of recurrent pancreatitis. Indian J Nephrol 2011; 21:215-7. [PMID: 21886987 PMCID: PMC3161445 DOI: 10.4103/0971-4065.78073] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Acute pancreatitis as a cause of thrombotic microangiopathy is very rare. We report a case of 40-year-old woman with idiopathic recurrent pancreatitis, who presented with acute pancreatitis complicated by thrombotic microangiopathy. Although thrombotic thrombocytopenic purpura/hemolytic uremic syndrome (TTP/HUS) has been reported as causing acute pancreatitis, the induction of TTP/HUS by pancreatitis is rare. As far as we are aware this is the first reported case of TTP/HUS in association with pancreatitis in India. Our patient had a complete recovery of her thrombotic microangiopathy following plasma exchange therapy.
Collapse
|
96
|
Iwuagwu F, Siddiqui A. Pedicled (antegrade) SUPBRA flap - for wound cover on volar aspect of thumb. J Plast Reconstr Aesthet Surg 2011; 65:678-80. [PMID: 21945339 DOI: 10.1016/j.bjps.2011.08.045] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Revised: 07/18/2011] [Accepted: 08/24/2011] [Indexed: 11/17/2022]
Abstract
A dictum of reconstruction is to replace like with like. Therefore, glabrous skin is best replaced with like tissue from the palm or the soles of the feet. We have previously presented our experience with free tissue from the palm based on the superficial palmer branch of the radial artery to reconstruct defects on the volar aspect of the digits following the original description of this flap by Kamei et al. There are situations where an antegrade pedicled flap from this area lends well as a choice for reconstruction. We describe the use of a pedicled flap from this axis for a defect on the radial aspect of the thumb and we believe it is the first report of its kind.
Collapse
|
97
|
Siddiqui A, Brown J, Guenther B, Narang S. Reducing expectations: Is an extension of current boundary extension theories needed? J Vis 2011. [DOI: 10.1167/11.11.1128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
|
98
|
Kass-Hout T, Mokin M, Kass-Hout O, Darkhabani M, Orion D, Jahshan S, Yashar P, Levy E, Siddiqui A, Snyder K. P-005 Is bridging with intravenous thrombolysis of any benefit in endovascular therapy of acute ischemic stroke? J Neurointerv Surg 2011. [DOI: 10.1136/neurintsurg-2011-010097.39] [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]
|
99
|
Ionita C, Wang W, Jain A, Siddiqui A, Levy E, Hopkins N, Bednarek D, Rudin S. TU-C-211-06: Practical Operational Considerations for Clinical Usage of the Micro- Angio Fluoroscope (MAF) in Neuro-Vascular Interventions. Med Phys 2011. [DOI: 10.1118/1.3613151] [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
|
100
|
Channa J, Siddiqui A. Hepatitis C: are oral and maxillofacial surgeons in United Kingdom at a higher risk? Br J Oral Maxillofac Surg 2011. [DOI: 10.1016/j.bjoms.2011.03.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|