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Correlation of neurocognitive function and brain lesion load on magnetic resonance imaging in systemic lupus erythematosus

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Abstract

Neurocognitive dysfunction and brain injury on magnetic resonance imaging (MRI) are common in patients with systemic lupus erythematosus (SLE) and are associated with increased morbidity and mortality. However, brain MRI is expensive, is restricted by payers, and requires high expertise. Neurocognitive assessment is an easily available, safe, and inexpensive clinical tool that may select patients needing brain MRI. In this cross-sectional and controlled study, 76 SLE patients (69 women, age 37 ± 12 years) and 26 age and gender-matched healthy subjects (22 women, age 34 ± 11 years) underwent assessment of attention, memory, processing speed, executive function, motor function, and global neurocognitive function. All subjects underwent brain MRI with T1-weighted, fluid-attenuated inversion recovery (FLAIR), and diffusion-weighted imaging. Hemispheric and whole brain lesion load in cm3 were determined using semi-automated methods. Neurocognitive z-scores in all clinical domains were significantly lower and whole brain and right and left hemispheres brain lesion load were significantly greater in patients than in controls (all p ≤ 0.02). There was significant correlation between neurocognitive z-scores in all domains and whole brain lesion load: processing speed (r = − 0.46; p < 0.0001), attention (r = − 0.42; p < 0.001), memory (r = − 0.40; p = 0.0004), executive function (r = − 0.25; p = 0.03), motor function (r = − 0.25; p = 0.05), and global neurocognitive function (r = − 0.38; p = 0.006). Similar correlations were found for brain hemisphere lesion loads (all p ≤ 0.05). These correlations were strengthened when adjusted for glucocorticoid therapy and SLE disease activity index. Finally, global neurocognitive z-score and erythrosedimentation rate were the only independent predictors of whole brain lesion load (both p ≤ 0.007). Neurocognitive measures and brain lesion load are worse in SLE patients than in controls. In SLE patients, neurocognitive z-scores correlate negatively with and independently predict brain lesion load. Therefore, neurocognitive testing may be an effective clinical tool to select patients needing brain MRI.

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Acknowledgements

This research was funded by the Grant RO1-HL04722-01-A6 by the National Institutes of Health/National Heart Lung and Blood Institute and in part by the National Center for Research Resources and National Center for Advancing Translational Sciences through the Grant Number 8UL1-TR00004-1.

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Authors and Affiliations

  1. Department of Medicine, Divisions of Cardiology and Rheumatology, University of New Mexico School of Medicine, Cardiology 5-ACC, MSC 10-5550, 1 University of New Mexico, Albuquerque, NM, 87131-0001, USA

    Paola C. Roldan, Rex E. Jung, Wilmer L. Sibbitt, Clifford R. Qualls, Ranee A. Flores & Carlos A. Roldan

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  1. Paola C. Roldan
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  2. Rex E. Jung
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  3. Wilmer L. Sibbitt
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  6. Carlos A. Roldan
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Correspondence to Carlos A. Roldan.

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Roldan, P.C., Jung, R.E., Sibbitt, W.L. et al. Correlation of neurocognitive function and brain lesion load on magnetic resonance imaging in systemic lupus erythematosus. Rheumatol Int 38, 1539–1546 (2018). https://doi.org/10.1007/s00296-018-4080-7

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  • DOI: https://doi.org/10.1007/s00296-018-4080-7

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