VA Medical Center - Portland Oregon

Author Of 1 Presentation

Imaging Poster Presentation

P0658 - Vascular Disease Risk Factors in Multiple Sclerosis (ID 1867)

Speakers
Presentation Number
P0658
Presentation Topic
Imaging

Abstract

Background

VDRF, such as hyperlipidemia, hypertension, obesity, diabetes, and heart disease, appear to significantly increase the risk of disability progression in MS, however the underlying mechanisms are not well understood.

Objectives

To determine if the presence of VDRF affects the disease progression and brain phosphate metabolism in people with MS.

Methods

This is a 3-year prospective, observational, single-site, study with two arms (MS subjects with and without VDRF). We collect 7T MRI brain data at baseline, 12, 24 and 36 months (V1, V2, V3 and V4 visits, respectively) and clinical and biomarkers data every 6 months. Outcome measures include changes in: 1) high energy phosphate metabolites in cerebral gray matter assessed by 31P 7T MR imaging (MRSI) and 2) brain parenchymal volume, 3) clinical impairment, disability, and quality of life.

Results

We preformed cross-sectional and longitudinal analyses of MRI data (52 V1 and 37 V3 subjects). Mean age/gender was 54.6 years with 71% female) (+VDRF, N=29, mean age 56.3 years, 83% female) and -VDRF, N=23, mean age 52.4 years; 57% female) at baseline. We analyzed a volume of interest in the occipital region for changes in phosphate metabolites (V1 and V3) using 7T MRSI. We observed decrease in Adenosine triphosphate (ATP) to total phosphate signal ratio in +VDRF subjects by 3.3% (P<0.05) compared with -VDRF. +VDRF subjects showed a larger reduction in parenchymal volume fraction (0.01544, P=0.025) over time (between V1 and V3) compared to ‑VDRF (0.00423). No significant group differences in temporal changes in phosphate metabolites are seen. Additional analyses are underway.

Conclusions

This is the first study to assess brain metabolism and volume in MS patients with and without VDRF. +VDRF MS subjects have significantly reduced brain ATP compared with -VDRF. ATP depletion may reflect mitochondrial dysfunction and contribute to MS disease progression as suggested by the increased brain atrophy in those with VDRF.

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Presenter Of 1 Presentation

Imaging Poster Presentation

P0658 - Vascular Disease Risk Factors in Multiple Sclerosis (ID 1867)

Speakers
Presentation Number
P0658
Presentation Topic
Imaging

Abstract

Background

VDRF, such as hyperlipidemia, hypertension, obesity, diabetes, and heart disease, appear to significantly increase the risk of disability progression in MS, however the underlying mechanisms are not well understood.

Objectives

To determine if the presence of VDRF affects the disease progression and brain phosphate metabolism in people with MS.

Methods

This is a 3-year prospective, observational, single-site, study with two arms (MS subjects with and without VDRF). We collect 7T MRI brain data at baseline, 12, 24 and 36 months (V1, V2, V3 and V4 visits, respectively) and clinical and biomarkers data every 6 months. Outcome measures include changes in: 1) high energy phosphate metabolites in cerebral gray matter assessed by 31P 7T MR imaging (MRSI) and 2) brain parenchymal volume, 3) clinical impairment, disability, and quality of life.

Results

We preformed cross-sectional and longitudinal analyses of MRI data (52 V1 and 37 V3 subjects). Mean age/gender was 54.6 years with 71% female) (+VDRF, N=29, mean age 56.3 years, 83% female) and -VDRF, N=23, mean age 52.4 years; 57% female) at baseline. We analyzed a volume of interest in the occipital region for changes in phosphate metabolites (V1 and V3) using 7T MRSI. We observed decrease in Adenosine triphosphate (ATP) to total phosphate signal ratio in +VDRF subjects by 3.3% (P<0.05) compared with -VDRF. +VDRF subjects showed a larger reduction in parenchymal volume fraction (0.01544, P=0.025) over time (between V1 and V3) compared to ‑VDRF (0.00423). No significant group differences in temporal changes in phosphate metabolites are seen. Additional analyses are underway.

Conclusions

This is the first study to assess brain metabolism and volume in MS patients with and without VDRF. +VDRF MS subjects have significantly reduced brain ATP compared with -VDRF. ATP depletion may reflect mitochondrial dysfunction and contribute to MS disease progression as suggested by the increased brain atrophy in those with VDRF.

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