Multiple sclerosis (MS) is a chronic inflammatory disorder of the central nervous system (CNS) and one of the most common causes of nontraumatic disability among young and middle-aged people. One of the hallmarks, however, is the progressive neurodegeneration that plays a key role in the progression of neurological disabilities. Little is known of the link between neuroinflammation and neurodegeneration. Recent biochemical studies suggested that there is defective oxygen metabolism in mitochondria due to increased nitric oxide (NO) as a result of vascular inflammation, which may play a crucial role in neuronal/axonal injury. In addition, NO is a strong mediator of neurovascular coupling that is responsible for increased blood supply during transient neural activation. In MS, the presence of a tonically high NO level (even during resting) may desensitize the vascular smooth muscle over time with a consequence of decreased vasodilatory capacity or cerebral vascular reactivity (CVR) and limited blood supply when neurons perform a demanding task. The Overarching Goals of this proposal are to detect and characterize abnormalities in oxygen consumption and vascular reactivity in early MS and identify tissues at risk using several advanced metabolic/vascular MRI techniques. These include a recently developed T2-Relaxation-Under-Spin-Tagging (TRUST) for the evaluation of global cerebral metabolic rate of oxygen (CMRO2) and a patient-comfortable blood-oxygen-level-dependent (BOLD) paradigm using CO2 inhalation to measure CVR. We will quantify CMRO2 and CVR abnormalities in patients with early relapsing-remitting (RR) MS and subsequent advanced stage of secondary progressive (SP) MS that are associated with clinical disability and disease progression. We hypothesize that oxygen metabolism abnormality in conjunction with impaired blood flow regulation is a key factor causing early degeneration. We also hypothesize that the combined functional index of CMRO2 and CVR has the potential to be an objective marker to predict neurodegenerative progression and its clinical outcome in MS.
The Specific Aims are as follows: 1. To assess global CMRO2 abnormalities using TRUST MRI in patients with early RR and SP patients as compared with age/sex matched normal controls; 2. To measure CVR using inhalation of 5% CO2 and BOLD imaging in order to elucidate the nature of cerebrovascular dysfunction in MS patients; 3. To measure CVR and CMRO2 changes in healthy controls between groups with low and high intake of dietary nitrate (corresponding to higher NO level); 4. To determine longitudinal changes of CMRO2 and CVR in early RRMS patients and their relationship to imaging and clinical outcomes over a 5-year period. Health Relevance: By providing in vivo MRI confirmation of our working hypotheses, this application could have profound consequences for our understanding of disease pathogenesis and progression (neurological disability and cognitive decline) in MS, and for the future design of novel therapeutic strategies.

Public Health Relevance

The proposed study will investigate and characterize the oxygen delivery and consumption abnormalities that are tightly linked to vascular endothelial and mitochondrial dysfunction and consequent neuronal/axonal injury using several advanced MRI techniques in early relapsing remitting and advanced secondary progressive multiple sclerosis. We want to address the fundamental question of how these measurements can predict the longitudinal accumulation of neurological disability and neurodegenerative progression or conversion into secondary progressive phase. Potential implications of these data include impact on neuroprotective treatment strategies.

National Institute of Health (NIH)
National Institute of Neurological Disorders and Stroke (NINDS)
Research Project (R01)
Project #
Application #
Study Section
Special Emphasis Panel (ZRG1)
Program Officer
Utz, Ursula
Project Start
Project End
Budget Start
Budget End
Support Year
Fiscal Year
Total Cost
Indirect Cost
New York University
Schools of Medicine
New York
United States
Zip Code
Liu, Saifeng; Brisset, Jean-Christophe; Hu, Jiani et al. (2018) Susceptibility weighted imaging and quantitative susceptibility mapping of the cerebral vasculature using ferumoxytol. J Magn Reson Imaging 47:621-633
Chawla, Sanjeev; Kister, Ilya; Sinnecker, Tim et al. (2018) Longitudinal study of multiple sclerosis lesions using ultra-high field (7T) multiparametric MR imaging. PLoS One 13:e0202918
Lin, Zixuan; Li, Yang; Su, Pan et al. (2018) Non-contrast MR imaging of blood-brain barrier permeability to water. Magn Reson Med 80:1507-1520
Marshall, Olga; Chawla, Sanjeev; Lu, Hanzhang et al. (2016) Cerebral blood flow modulation insufficiency in brain networks in multiple sclerosis: A hypercapnia MRI study. J Cereb Blood Flow Metab 36:2087-2095
Chawla, S; Kister, I; Wuerfel, J et al. (2016) Iron and Non-Iron-Related Characteristics of Multiple Sclerosis and Neuromyelitis Optica Lesions at 7T MRI. AJNR Am J Neuroradiol 37:1223-30
Zhou, Yongxia; Rodgers, Zachary B; Kuo, Anderson H (2015) Cerebrovascular reactivity measured with arterial spin labeling and blood oxygen level dependent techniques. Magn Reson Imaging 33:566-76
Ge, Yulin; Marshall, Olga; Lu, Hanzhang (2015) Intracranial relationship between arterioles and venules size--reply. JAMA Neurol 72:124-5
Marshall, Olga; Uh, Jinsoo; Lurie, Daniel et al. (2015) The influence of mild carbon dioxide on brain functional homotopy using resting-state fMRI. Hum Brain Mapp 36:3912-21
Chawla, S; Ge, Y; Lu, H et al. (2015) Whole-Brain N-Acetylaspartate Concentration Is Preserved during Mild Hypercapnia Challenge. AJNR Am J Neuroradiol 36:2055-61
Marshall, Olga; Lu, Hanzhang; Brisset, Jean-Christophe et al. (2014) Impaired cerebrovascular reactivity in multiple sclerosis. JAMA Neurol 71:1275-81

Showing the most recent 10 out of 14 publications