Jonathan D. Krett

ORCID: 0000-0003-4964-3341
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About
Contact & Profiles
Research Areas
  • Multiple Sclerosis Research Studies
  • Long-Term Effects of COVID-19
  • Mitochondrial Function and Pathology
  • Ubiquitin and proteasome pathways
  • Autophagy in Disease and Therapy
  • Peripheral Neuropathies and Disorders
  • COVID-19 and Mental Health
  • Autoimmune Neurological Disorders and Treatments
  • Infectious Encephalopathies and Encephalitis
  • Fibromyalgia and Chronic Fatigue Syndrome Research
  • Cytokine Signaling Pathways and Interactions
  • SARS-CoV-2 and COVID-19 Research
  • Systemic Lupus Erythematosus Research
  • COVID-19 Clinical Research Studies
  • Intracerebral and Subarachnoid Hemorrhage Research
  • Intracranial Aneurysms: Treatment and Complications
  • Anesthesia and Pain Management
  • Genetic Neurodegenerative Diseases
  • Stroke Rehabilitation and Recovery
  • Pathogenesis and Treatment of Hiccups
  • Herpesvirus Infections and Treatments
  • History of Medicine Studies
  • Parkinson's Disease Mechanisms and Treatments
  • Protein Degradation and Inhibitors
  • Spine and Intervertebral Disc Pathology

Johns Hopkins University
2023-2025

Johns Hopkins Medicine
2023-2025

Cedars-Sinai Medical Center
2024

University of California, Los Angeles
2024

University of Calgary
2018-2023

University of Alberta
2023

Women and Children’s Health Research Institute
2023

Centre for Mental Health
2023

Deleted Institution
2023

Montreal Neurological Institute and Hospital
2013-2022

Parkin Enhanced? Inactivation of parkin, an E3 ubiquitin ligase, is responsible for a familial form Parkinson's disease and may be involved in sporadic forms as well. Trempe et al. (p. 1451 , published online 9 May) present the crystal structure full-length parkin autoinhibited configuration. Guided by structure, mutations were designed that activated both vitro cells. Because neuroprotective, provides framework enhancing function therapeutic strategy disease.

10.1126/science.1237908 article EN Science 2013-05-10

A 28-year-old Black woman presented with both typical and atypical features of multiple sclerosis in the setting multimorbidity including psychiatric history, complicating diagnosis treatment. This case illustrates importance differential longitudinal follow-up before committing to disease-modifying therapy. Individualized treatment decision-making is highlighted.

10.1212/nxi.0000000000200376 article EN Neurology Neuroimmunology & Neuroinflammation 2025-02-11

We used a robotic exoskeleton to quantify specific patterns of abnormal upper limb motor behaviour in people who have had transient ischemic attack (TIA). A cohort with TIA was recruited within two weeks symptom onset. All individuals completed robotic-based assessment 8 behavioural tasks related and proprioceptive function, as well cognitive function. Robotic task performance compared large controls without neurological impairments corrected for the influence age. Impairment defined below...

10.1371/journal.pone.0188786 article EN cc-by PLoS ONE 2017-12-22

Mutations in Parkin and PINK1 cause early-onset familial Parkinson's disease. is a RING-In-Between-RING E3 ligase that transfers ubiquitin from an E2 enzyme to substrate two steps: (i) thioester intermediate formation on (ii) acyl transfer lysine. The process triggered by PINK1, which phosphorylates damaged mitochondria, turn recruits activates Parkin. This leads the ubiquitination of outer mitochondrial membrane proteins clearance organelle. While targets mitochondria are known, factors...

10.1098/rsob.210255 article EN cc-by Open Biology 2022-01-01

The long-term impact of COVID-19 among those with mild infections is not well characterized. Among 81 adults who completed online assessments at 3- and 12-months following infection, quality life scores did significantly improve over time. 62 subjects also telephone interviews, respiratory symptoms or exercise limitation were reported by 42% a median follow-up 387 days (IQR 251-402 days). Those persistent scored lower on the EQ-5D visual analog score compared to without. Persistent...

10.1038/s41598-022-17243-7 article EN cc-by Scientific Reports 2022-07-29

Various neurologic manifestations have been reported in patients with COVID-19, mostly retrospective studies of admitted to hospital, but there are few data on mild COVID-19. We examined the frequency and persistence neurologic/neuropsychiatric symptoms COVID-19 a 1-year prospective cohort study, as well assessment use health care services patient-reported outcomes.Participants Alberta HOPE trial (hydroxychloroquine v. placebo for 5 d), managed outpatients, were prospectively assessed 3...

10.9778/cmajo.20220248 article EN CMAJ Open 2023-07-01

Herein we describe a case of relapsing anti-GAD65-associated encephalitis which was responsive to the combination thymoma resection, external beam radiotherapy, and immunomodulatory therapy. The illustrates value remaining vigilant for possibility paraneoplastic syndromes in context anti-GAD65 antibodies thymoma. It also that tumor-directed therapies may offer additional benefit beyond therapy alone.

10.1177/19418744241239099 article EN The Neurohospitalist 2024-03-09

Previous reports of patients with myelitis associated rheumatologic disease may have had unrecognized aquaporin-4 (AQP4)-IgG seropositive neuromyelitis optica spectrum disorder (NMOSD) or myelin oligodendrocyte glycoprotein (MOG)-IgG-associated (MOGAD). We clinicoradiologically and serologically characterized evaluated in the era availability MOG-IgG more sensitive AQP4-IgG cell-based assays.

10.1212/nxi.0000000000200329 article EN Neurology Neuroimmunology & Neuroinflammation 2024-10-23

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10.1017/cjn.2021.28 article EN Canadian Journal of Neurological Sciences / Journal Canadien des Sciences Neurologiques 2021-02-11

Accurate anti-aquaporin-4 (AQP4) and anti-myelin oligodendrocyte glycoprotein (MOG) autoantibody assays are needed to effectively diagnose neuromyelitis optica spectrum disorder MOG antibody-associated disease. A proportion of patients at our centre have been tested for anti-AQP4 anti-MOG autoantibodies locally, followed by an outsourced test as part real-world practice. Outsourced testing is costly unproven utility. We conducted a quality improvement project determine the value...

10.1017/cjn.2022.324 article EN cc-by Canadian Journal of Neurological Sciences / Journal Canadien des Sciences Neurologiques 2022-11-18

Abstract Mutations in Parkin and PINK1 cause an early-onset familial Parkinson’s disease. is a RING-In-Between-RING (RBR) E3 ligase that transfers ubiquitin from E2 enzyme to substrate two steps: 1) thioester intermediate formation on Parkin, 2) acyl transfer lysine. The process triggered by PINK1, which phosphorylates damaged mitochondria, turn recruits activates Parkin. This leads the ubiquitination of outer mitochondrial membrane proteins clearance organelle. While targets mitochondria...

10.1101/2021.08.25.457684 preprint EN cc-by-nc bioRxiv (Cold Spring Harbor Laboratory) 2021-08-25

Mutations in the Parkin gene are responsible for an autosomal recessive form of Parkinson's disease. The parkin protein is a RING1-In-Between-RING2 (RBR) E3 ubiquitin ligase, which functions through two-step mechanism involving parkin~ubiquitin thioester intermediate [1]. However, compared to other ligases, exhibits low basal activity and requires activation both vitro cells. As neuroprotective various models disease, understanding how it catalyses transfer will be critical. We previously...

10.1107/s2053273314091542 article EN Acta Crystallographica Section A Foundations and Advances 2014-08-05
Anuj Rastogi Manav V. Vyas Noreen Kamal Amy Y. X. Yu Sarah A. Morrow and 95 more Chantal Baldwin Samir Alkabie Jessalyn K. Holodinsky Patrice Lindsay Aravind Ganesh Raed A. Joundi Michael D. Hill Cera Cruise Nicole Mfoafo M'carthy Bonnie Lashewicz Radhika Nair Khurshid Khan Jillian Stang Mary-Lou Halabi Erik Youngson Anas Alrohimi Ashfaq Shuaib Blas Couto Susan H. Fox Maria Carmela Tartaglia Ekaterina Rogaeva Jeffrey Antwi Puja Bhakta Gábor Kovács Anthony E. Lang Nabeela Nathoo Myrlene Gee Krista Nelles Jacqueline Burt Hongfu Sun Peter Seres Alan H. Wilman Christian Beaulieu Richard Camicioli Jonathan D. Krett Marvin J. Fritzler Katayoun Alikhani Jodie Burton Elise Macadam Jason A. Berard Lisa A.S. Walker Patricia Mills Chetan P. Phadke Chris Boulias Sean P. Dukelow Farooq Ismail Stephen Mcneil Thomas Miller Colleen O’Connell Rajiv Reebye Lalith Satkunam Theodore Wein Paul Winston Marcela Câmara Machado‐Costa Miguel Mitne‐Neto Helena Meller da Silva Luiza Luciana Degani Costa Acary Alves Bulle Souza Mayana Oliveira Helga Zatz Almeida Cristina Wanli Yang Xi Chen Yu Zhou Xuelin Tang Yimin Sun Yi Dong Yang Hong Yan Chen Ming Zhang Abanoub Rizk Eric Plitman Pooja Senthil Lashmi Venkatraghavan Tumul Chowdhury Thallys Leal Weydler Campos Hottz Corbiceiro Diogo Goulart Corrêa Ghada Abbas Jason Karamchandani Anthony Ciarallo Liam Durcan Leon S. Moskatel Liza Smirnoff Claire H. Sandoe Valerie Lawler Suvendrini Lena Ana Marissa Lagman‐Bartolome Christine Lay Sandra Reiter-Campeau Fraser Moore Anthony Feinstein Lingkai Shen

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10.1017/cjn.2023.295 article EN Canadian Journal of Neurological Sciences / Journal Canadien des Sciences Neurologiques 2023-10-23

April 27, 2018April 10, 2018Free AccessCommunication Priorities in Spontaneous Intracerebral Hemorrhage (CPsICH): A Survey-based Study Incorporating Patient and Physician Perspectives (P6.335)Jonathan Krett, Cally Martin, Colleen Murphy, J. Gordon Boyd, Nicole Chenier-Hogan, Phyllis Davis, Vivian Bethell, Albert JinAuthors Info & AffiliationsApril 2018 issue90 (15_supplement)https://doi.org/10.1212/WNL.90.15_supplement.P6.335 Letters to the Editor

10.1212/wnl.90.15_supplement.p6.335 article EN Neurology 2018-04-10
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