Clyde Markowitz

ORCID: 0000-0003-3402-2489
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About
Contact & Profiles
Research Areas
  • Multiple Sclerosis Research Studies
  • Peripheral Neuropathies and Disorders
  • Immunotherapy and Immune Responses
  • Rheumatoid Arthritis Research and Therapies
  • Ocular Diseases and Behçet’s Syndrome
  • Systemic Lupus Erythematosus Research
  • Glaucoma and retinal disorders
  • Retinal and Optic Conditions
  • Polyomavirus and related diseases
  • Cytokine Signaling Pathways and Interactions
  • Ophthalmology and Visual Impairment Studies
  • SARS-CoV-2 and COVID-19 Research
  • Acute Lymphoblastic Leukemia research
  • Ultrasound Imaging and Elastography
  • Advanced Neuroimaging Techniques and Applications
  • Sphingolipid Metabolism and Signaling
  • Optical Coherence Tomography Applications
  • Herpesvirus Infections and Treatments
  • Gout, Hyperuricemia, Uric Acid
  • Advanced MRI Techniques and Applications
  • Neurogenesis and neuroplasticity mechanisms
  • RNA Interference and Gene Delivery
  • Amyotrophic Lateral Sclerosis Research
  • Neuropeptides and Animal Physiology
  • Monoclonal and Polyclonal Antibodies Research

University of Pennsylvania
2012-2024

Hospital of the University of Pennsylvania
2006-2024

New York Medical College
2024

California University of Pennsylvania
2023

University of California, San Francisco
2023

Office of Infectious Diseases
2023

NeuroRx Research (Canada)
2018

Vrije Universiteit Amsterdam
2018

IRCCS Ospedale San Raffaele
2013

Vita-Salute San Raffaele University
2013

Abstract We evaluated the safety, tolerability, pharmacodynamics, and activity of B‐cell depletion with rituximab in patients relapsing‐remitting multiple sclerosis, receiving two courses 6 months apart, followed for a total 72 weeks. No serious adverse events were noted; limited to mild‐to‐moderate infusion‐associated events, which tended decrease subsequent infusions. Infections also mild or moderate, none led withdrawal. Fewer new gadolinium‐enhancing T2 lesions seen starting from week 4...

10.1002/ana.21363 article EN Annals of Neurology 2008-03-01

SARS-CoV-2 messenger RNA vaccination in healthy individuals generates immune protection against COVID-19. However, little is known about mRNA vaccine-induced responses immunosuppressed patients. We investigated induction of antigen-specific antibody, B cell and T longitudinally patients with multiple sclerosis (MS) on anti-CD20 antibody monotherapy (n = 20) compared controls 10) after BNT162b2 or mRNA-1273 vaccination. Treatment monoclonal (aCD20) significantly reduced spike-specific...

10.1038/s41591-021-01507-2 article EN cc-by Nature Medicine 2021-09-14

Cross-sectional studies of optical coherence tomography (OCT) show that retinal nerve fiber layer (RNFL) thickness is reduced in multiple sclerosis (MS) and correlates with visual function. We determined how longitudinal changes RNFL relate to loss. also examined patterns thinning over time MS eyes without a prior history acute optic neuritis (ON).Patients underwent OCT measurement at baseline 6-month intervals during mean follow-up 18 months 3 centers. Low-contrast letter acuity (2.5%,...

10.1002/ana.22005 article EN Annals of Neurology 2010-02-19

<h3>Background</h3> Inner (area adjacent to the fovea) and outer regions of macula differ with respect relative thicknesses ganglion cell layer (neurons) vs retinal nerve fiber (RNFL; axons). <h3>Objective</h3> To determine how inner macular volumes relate peripapillary RNFL thickness visual function in multiple sclerosis (MS) examine these patterns among eyes without a history acute optic neuritis (ON). <h3>Design</h3> Study using cross-sectional optical coherence tomography....

10.1001/archneurol.2009.230 article EN Archives of Neurology 2009-11-01

<b><i>Background:</i></b> Visual dysfunction is one of the most common causes disability in multiple sclerosis (MS). The Multiple Sclerosis Functional Composite (MSFC), a new clinical trial outcome measure, does not currently include test visual function. <b><i>Objective:</i></b> To examine contrast letter acuity as candidate function for MSFC. <b><i>Methods:</i></b> Binocular testing (Sloan charts) was performed subgroup participants from International Secondary Progressive Avonex...

10.1212/01.wnl.0000094315.19931.90 article EN Neurology 2003-11-25

<h3>Objective:</h3> To examine the relation between low contrast letter acuity, a new visual function test for multiple sclerosis (MS) trials, and vision targeted health related quality of life (HRQOL). <h3>Methods:</h3> Patients in this cross sectional study were part an ongoing investigation MS. tested binocularly using acuity Early Treatment Diabetic Retinopathy Study (ETDRS) (VA) charts. The 25 Item National Eye Institute Visual Functioning Questionnaire (NEI-VFQ-25), 10 Neuro-Ophthalmic...

10.1136/jnnp.2008.165449 article EN Journal of Neurology Neurosurgery & Psychiatry 2009-02-23

<h3>Background</h3> Optical coherence tomography (OCT) and scanning laser polarimetry with variable corneal compensation (GDx) are similar yet provide information on different aspects of retinal nerve fiber layer (RNFL) structure (thickness values to histology for OCT vs birefringence microtubules GDx). <h3>Objectives</h3> To compare the ability GDx distinguish eyes patients multiple sclerosis (MS) from disease-free controls thus identify RNFL abnormalities. We also sought examine capacity...

10.1001/archneur.65.7.924 article EN Archives of Neurology 2008-07-01

The objective of this study is to evaluate the safety and tolerability inosine in patients with relapsing-remitting multiple sclerosis (RRMS). secondary objectives are assess effects administration on serum urate (UA) levels, progression neurologic disability, cumulative number new, active lesions magnetic resonance imaging (MRI), changes levels for markers inflammation.Oral was used raise natural peroxynitrite scavenger UA 16 RRMS during a 1-year randomized, double-blind trial.The endpoints...

10.1089/acm.2008.0513 article EN The Journal of Alternative and Complementary Medicine 2009-05-08
Gavin Giovannoni Jeffrey Cohen Alasdair Coles Hans-Peter Hartung Eva Havrdová and 95 more Krzysztof Selmaj David Margolin Stephen Lake Susan M. Kaup Michael Panzara D. A. S. Compston Douglas L. Arnold Jeffrey Cohen Alasdair Coles Alastair Compston Christian Confavreux Edward Fox Hans-Peter Hartung Eva Havrdová Krzysztof Selmaj Howard L. Weiner Hillel S. Panitch David B. Clifford Jack P. Antel Frederik Barkhof David R. Snydman Leslie J. DeGroot Douglas B. Cines Ralph B. D’Agostino Benjamin Greenberg Jörg Krauss Volker Limmroth Clyde Markowitz Robert T. Naismith David Tabby Norma Deri Karyn Boundy Simon Broadley Michael Dreyer Suzanne Hodgkinson John O. King Richard Macdonell FAFRM RACP Pamela McCombe Mark Paine Stephen W. Reddel Raymond Schwartz Steve Vucic MD. Karl Vass PhD Dominique Dive Bénédicte Dubois Christian Sindic Dagoberto Callegaro Maria Lúcia Brito Ferreira Marcio Mena Barreto Martins Charles Peter Tilbery Charles Ayotte Donald Brunet Mark Freedman François Grand’Maison François Jacques Marcelo Kremenchutzky Anthony Traboulsee MD Licia Antonelli Vesna Brinar Mario Habek Spomenka Kiđemet Piskač Zlatko Trkanjec Anton Vladić Ivana Kovářová Ivan Rektor Radomír Taláb Marta Vachová Thor Petersen Mads Ravnborg Per Soelberg Sørensen Michel Clanet Pierre Clavelou de Sèze Marc Debouverie Gilles Edan Catherine Lubetzki Thibault Moreau Patrick Vermersch Karl Baum Judith Haas Bernhard Hemmer Ulrich Herrlinger Wolfgang Köhler G. Ochs Martin Stangel Hayrettin Tumani Péter Urbán Uwe K. Zettl Tjalf Ziemssen Anat Achiron Arnon Karni Adi Vaknin Dembinsky Antonio Bertolotto Ruggero Capra

<h3>Objective:</h3> To characterize effects of alemtuzumab treatment on measures disability improvement in patients with relapsing-remitting multiple sclerosis (RRMS) inadequate response (≥1 relapse) to prior therapy. <h3>Methods:</h3> Comparison Alemtuzumab and Rebif Efficacy Multiple Sclerosis (CARE-MS) II, a 2-year randomized, rater-blinded, active-controlled, head-to-head, phase 3 trial, compared efficacy safety 12 mg subcutaneous interferon-β-1a (SC IFN-β-1a) 44 μg RRMS. Prespecified...

10.1212/wnl.0000000000003319 article EN cc-by-nc-nd Neurology 2016-10-13

Background: Upper extremity (UE) impairment is common with primary progressive multiple sclerosis (PPMS). Objective: This exploratory analysis examined the effects of ocrelizumab on confirmed progression (CP) and improvement (CI) in UE patients from ORATORIO. Methods: Patients PPMS received 600 mg or placebo every 24 weeks for ⩾120 weeks. The Nine-Hole Peg Test (9HPT) was administered at baseline (BL) 12 thereafter. Prespecified endpoints included change 9HPT time proportion CP ⩾20% 9HPT....

10.1177/1352458518808189 article EN cc-by-nc Multiple Sclerosis Journal 2018-11-12

Abstract SARS-CoV-2 mRNA vaccination in healthy individuals generates effective immune protection against COVID-19. Little is known, however, about the vaccine-induced responses immunosuppressed patients. We investigated induction of antigen-specific antibody, B cell and T patients with multiple sclerosis on anti-CD20 (MS-aCD20) monotherapy following vaccination. Treatment aCD20 significantly reduced Spike RBD specific antibody memory most patients, an effect that was ameliorated longer...

10.1101/2021.06.23.21259389 preprint EN cc-by-nc-nd medRxiv (Cold Spring Harbor Laboratory) 2021-06-30

Multiple sclerosis (MS) is an immune-mediated neurological disorder, and up to 50% of patients experience depression. We investigated how white matter network disruption related depression in MS.

10.1016/j.biopsych.2023.11.010 article EN cc-by-nc-nd Biological Psychiatry 2023-11-18

<b>Objective: </b> To examine the relation between low-contrast letter acuity, an emerging visual outcome for multiple sclerosis (MS) clinical trials, and brain MRI abnormalities in MS cohort. <b>Methods: T2 lesion volume parenchymal fraction were determined whole within pathway regions of interest. Magnetization transfer ratio histograms examined. Vision testing was performed binocularly using acuity (2.5%, 1.25% contrast) high-contrast (VA). Linear regression, accounting age disease...

10.1212/01.wnl.0000278387.15090.5a article EN Neurology 2007-09-20

A 36-year-old woman presented with severe dysarthria, axial and appendicular tremor, ataxia.Symptoms began the tremor 2 years prior to presentation.Neurologic examination revealed presence of Kayser-Fleischer rings (figure, A), dysarthria dysphonia, akathisia, truncal left hemiparesis, dystonia.Serum ceruloplasmin was markedly decreased at 10 mg/dL (normal 18 55 mg/dL).An MRI diffuse white matter abnormalities bilateral symmetric involvement midbrain, pons, inferior cerebellum, thalami,...

10.1212/01.wnl.0000085871.98174.4e article EN Neurology 2003-10-14
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