Bao J, Li Z, Zhang Y, Zhuang Y, Li Y, Wang X, Ren Y, Wang P, Zhang Y, Cheng J. Low Unsaturated Fatty Acids Level in the Vertebral Bone Marrow of Postmenopausal Osteoporosis: A Pilot
2D iDQC‐MRS
on 3.0 T Study.
J Magn Reson Imaging 2022;
57:1423-1430. [PMID:
36094322 DOI:
10.1002/jmri.28383]
[Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 07/25/2022] [Accepted: 07/26/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND
Unsaturated fatty acids (UFAs) of bone marrow play a critical role in osteoporosis. However, it is difficult to resolve the UFA, especially in the presence of trabecular bone, using conventional magnetic resonance spectroscopy (MRS) methods.
PURPOSE
To preliminarily compare the bone marrow fatty acids (FAs) composition in the presence of trabecular bone of postmenopausal osteoporosis (PMOP) and healthy controls (HC).
STUDY TYPE
Prospective.
SUBJECTS
Total thirty-six postmenopausal women were recruited with CT-confirmed PMOP (n = 19) and HC (n = 17).
FIELD STRENGTH/SEQUENCES
A 3 T scanner. Localized 2D intermolecular double-quantum coherence-based MRS (iDQC-MRS).
ASSESSMENT
In addition to the conventional water and fat peaks, another four crossing peaks of the FAs were well resolved from the L4 vertebral bone marrow using iDQC-MRS technique: allylic methylene (2.0 ppm), terminal methylene (2.2 ppm), diallylic methylene (2.7 ppm), and olefinic (5.3 ppm). The monounsaturated fatty acids (MOFA) and polyunsaturated fatty acids (PUFAs) were then calculated.
STATISTICAL TESTS
Differences between PMOP and HC were investigated using the analysis of a t-test, and the relationships were investigated using regression analysis.
RESULTS
MOFAs and PUFAs fractions were significantly lower in the PMOP group compared to the HC group. In contrast, the saturated FAs fraction is significantly higher in the PMOP group. Additionally, decreased PUFAs, MOFAs were moderately negatively correlated with the volumetric bone mineral density (vBMD) in the PMOP group. Furthermore, increased SFAs in PMOP were strongly associated with vBMD.
DATA CONCLUSION
Using spectra resolution enhanced 2D iDQC-MRS technique, we observed low unsaturated FAs levels in the vertebral bone marrow of the PMOP patients. The reduced unsaturated FAs levels in PMOP may be associated with dysfunction of the balance between osteoblastogenesis and osteoclastogenesis.
LEVEL OF EVIDENCE: 2
TECHNICAL EFFICACY STAGE
1.
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