1
|
Avtanski D, Hadzi-Petrushev N, Josifovska S, Mladenov M, Reddy V. Emerging technologies in adipose tissue research. Adipocyte 2023; 12:2248673. [PMID: 37599422 PMCID: PMC10443968 DOI: 10.1080/21623945.2023.2248673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 08/03/2023] [Accepted: 08/07/2023] [Indexed: 08/22/2023] Open
Abstract
Technologies are transforming the understanding of adipose tissue as a complex and dynamic tissue that plays a critical role in energy homoeostasis and metabolic health. This mini-review provides a brief overview of the potential impact of novel technologies in biomedical research and aims to identify areas where these technologies can make the most significant contribution to adipose tissue research. It discusses the impact of cutting-edge technologies such as single-cell sequencing, multi-omics analyses, spatial transcriptomics, live imaging, 3D tissue engineering, microbiome analysis, in vivo imaging, and artificial intelligence/machine learning. As these technologies continue to evolve, we can expect them to play an increasingly important role in advancing our understanding of adipose tissue and improving the treatment of related diseases.
Collapse
Affiliation(s)
- Dimiter Avtanski
- Friedman Diabetes Institute, Lenox Hill Hospital, New York, NY, USA
- Institute of Bioelectronic Medicine, Feinstein Institutes for Medical Research, Manhasset, NY, USA
- Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, Hempstead, NY, USA
| | - Nikola Hadzi-Petrushev
- Faculty of Natural Sciences and Mathematics, Institute of Biology, “Ss. Cyril and Methodius” University, Skopje, North Macedonia
| | - Slavica Josifovska
- Faculty of Natural Sciences and Mathematics, Institute of Biology, “Ss. Cyril and Methodius” University, Skopje, North Macedonia
| | - Mitko Mladenov
- Faculty of Natural Sciences and Mathematics, Institute of Biology, “Ss. Cyril and Methodius” University, Skopje, North Macedonia
| | - Varun Reddy
- New York Institute of Technology College of Osteopathic Medicine, Old Westbury, NY, USA
| |
Collapse
|
2
|
Tencerova M, Duque G, Beekman KM, Corsi A, Geurts J, Bisschop PH, Paccou J. The Impact of Interventional Weight Loss on Bone Marrow Adipose Tissue in People Living with Obesity and Its Connection to Bone Metabolism. Nutrients 2023; 15:4601. [PMID: 37960254 PMCID: PMC10650495 DOI: 10.3390/nu15214601] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 10/25/2023] [Accepted: 10/26/2023] [Indexed: 11/15/2023] Open
Abstract
This review focuses on providing physicians with insights into the complex relationship between bone marrow adipose tissue (BMAT) and bone health, in the context of weight loss through caloric restriction or metabolic and bariatric surgery (MBS), in people living with obesity (PwO). We summarize the complex relationship between BMAT and bone health, provide an overview of noninvasive imaging techniques to quantify human BMAT, and discuss clinical studies measuring BMAT in PwO before and after weight loss. The relationship between BMAT and bone is subject to variations based on factors such as age, sex, menopausal status, skeletal sites, nutritional status, and metabolic conditions. The Bone Marrow Adiposity Society (BMAS) recommends standardizing imaging protocols to increase comparability across studies and sites, they have identified both water-fat imaging (WFI) and spectroscopy (1H-MRS) as accepted standards for in vivo quantification of BMAT. Clinical studies measuring BMAT in PwO are limited and have shown contradictory results. However, BMAT tends to be higher in patients with the highest visceral adiposity, and inverse associations between BMAT and bone mineral density (BMD) have been consistently found in PwO. Furthermore, BMAT levels tend to decrease after caloric restriction-induced weight loss. Although weight loss was associated with overall fat loss, a reduction in BMAT did not always follow the changes in fat volume in other tissues. The effects of MBS on BMAT are not consistent among the studies, which is at least partly related to the differences in the study population, skeletal site, and duration of the follow-up. Overall, gastric bypass appears to decrease BMAT, particularly in patients with diabetes and postmenopausal women, whereas sleeve gastrectomy appears to increase BMAT. More research is necessary to evaluate changes in BMAT and its connection to bone metabolism, either in PwO or in cases of weight loss through caloric restriction or MBS, to better understand the role of BMAT in this context and determine the local or systemic factors involved.
Collapse
Affiliation(s)
- Michaela Tencerova
- Molecular Physiology of Bone, Institute of Physiology of the Czech Academy of Sciences, 14220 Prague, Czech Republic;
| | - Gustavo Duque
- Department of Medicine, Research Institute of the McGill University Health Centre, Montreal, QC H4A 3J1, Canada;
| | - Kerensa M. Beekman
- Department of Radiology and Nuclear Medicine, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands;
| | - Alessandro Corsi
- Department of Molecular Medicine, Sapienza University of Rome, 00161 Rome, Italy;
| | - Jeroen Geurts
- Rheumatology, Department of Musculoskeletal Medicine, Lausanne University Hospital, 1011 Lausanne, Switzerland;
| | - Peter H. Bisschop
- Department of Endocrinology, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands;
| | - Julien Paccou
- Department of Rheumatology, MABLab ULR 4490, CHU Lille, University Lille, 59000 Lille, France
| |
Collapse
|
3
|
Del Chicca F, Richter H, Müller HP, Kassubek J. MRI-based quantification of adipose tissue distribution in healthy adult cats during body weight gain. Front Vet Sci 2023; 10:1150085. [PMID: 37215477 PMCID: PMC10196178 DOI: 10.3389/fvets.2023.1150085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 04/14/2023] [Indexed: 05/24/2023] Open
Abstract
The incidence of obesity in pet population increased over the last decades. Cats have been suggested as model for human obesity because of similar co-morbidities as diabetes and dyslipidaemia. Aim of this study were to quantify the distribution of visceral and subcutaneous adipose tissue (VAT, SAT respectively) in healthy adult cats during feeding-induced body weight (BW) gain by MRI, and to correlate it to the increased hepatic fat fraction (HFF). Cats received a commercial dry food ad libitum for 40 weeks and were longitudinally scanned three times. VAT and SAT were determined from Dixon MRI data by a dedicated software solution (ATLAS, established in human and rodents). HFF was quantified from a commercially available sequence. At both individual and group level, normalized adipose tissue volumes significantly increased longitudinally, with median VAT/SAT ratio always < 1. With increased BW, more than proportional increased total adipose tissue was observed together with more than proportional increased HFF. HFF is disproportionately high in overweight cats compared to SAT and VAT accumulation in the 40 weeks observation period. Quantitative unbiased MRI examination of different body fat components is useful in longitudinal monitoring of obesity in cats.
Collapse
Affiliation(s)
- Francesca Del Chicca
- Clinic for Diagnostic Imaging, Department of Diagnostics and Clinical Services, Vetsuisse Faculty Zurich, Zurich, Switzerland
| | - Henning Richter
- Clinic for Diagnostic Imaging, Department of Diagnostics and Clinical Services, Vetsuisse Faculty Zurich, Zurich, Switzerland
| | | | - Jan Kassubek
- Department of Neurology, University of Ulm, Ulm, Germany
| |
Collapse
|
4
|
Ofir N, Mizrakli Y, Greenshpan Y, Gepner Y, Sharabi O, Tsaban G, Zelicha H, Yaskolka Meir A, Ceglarek U, Stumvoll M, Blüher M, Chassidim Y, Rudich A, Reiner-Benaim A, Shai I, Shelef I, Gazit R. Vertebrae but not femur marrow fat transiently decreases in response to body weight loss in an 18-month randomized control trial. Bone 2023; 171:116727. [PMID: 36898571 DOI: 10.1016/j.bone.2023.116727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 02/06/2023] [Accepted: 03/05/2023] [Indexed: 03/11/2023]
Abstract
BACKGROUND Increased levels of bone marrow adipose tissue (BMAT) are negatively associated with skeletal health and hematopoiesis. BMAT is known to increase with age; however, the effect of long-term weight loss on BMAT is still unknown. OBJECTIVE In this study, we examined BMAT response to lifestyle-induced weight loss in 138 participants (mean age 48 y; mean body mass index 31 kg/m2), who participated in the CENTRAL-MRI trial. METHODS Participants were randomized for dietary intervention of low-fat or low-carb, with or without physical activity. Magnetic resonance imaging (MRI) was used to quantify BMAT and other fat depots at baseline, six and eighteen months of intervention. Blood biomarkers were also measured at the same time points. RESULTS At baseline, the L3 vertebrae BMAT is positively associated with age, HDL cholesterol, HbA1c and adiponectin; but not with other fat depots or other metabolic markers tested. Following six months of dietary intervention, the L3 BMAT declined by an average of 3.1 %, followed by a return to baseline after eighteen months (p < 0.001 and p = 0.189 compared to baseline, respectively). The decrease of BMAT during the first six months was associated with a decrease in waist circumference, cholesterol, proximal-femur BMAT, and superficial subcutaneous adipose tissue (SAT), as well as with younger age. Nevertheless, BMAT changes did not correlate with changes in other fat depots. CONCLUSIONS We conclude that physiological weight loss can transiently reduce BMAT in adults, and this effect is more prominent in younger adults. Our findings suggest that BMAT storage and dynamics are largely independent of other fat depots or cardio-metabolic risk markers, highlighting its unique functions.
Collapse
Affiliation(s)
- Noa Ofir
- The Shraga Segal Department for Microbiology Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel; National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Be'er Sheva, Israel; Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er-Sheva, Israel
| | - Yuval Mizrakli
- The Shraga Segal Department for Microbiology Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel; National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Be'er Sheva, Israel
| | - Yariv Greenshpan
- The Shraga Segal Department for Microbiology Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel; National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Be'er Sheva, Israel; Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er-Sheva, Israel
| | - Yftach Gepner
- Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er-Sheva, Israel; Department of Epidemiology and Preventive Medicine, School of Public Health, Sackler Faculty of Medicine, Sylvan Adams Sports Institute, Tel-Aviv University, Tel-Aviv, Israel
| | - Omri Sharabi
- The Shraga Segal Department for Microbiology Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel; National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Be'er Sheva, Israel; Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er-Sheva, Israel
| | - Gal Tsaban
- Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er-Sheva, Israel
| | - Hila Zelicha
- Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er-Sheva, Israel
| | - Anat Yaskolka Meir
- Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er-Sheva, Israel
| | - Uta Ceglarek
- Institute of Laboratory Medicine, University of Leipzig Medical Center, Germany
| | | | | | | | - Assaf Rudich
- National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Be'er Sheva, Israel; Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er-Sheva, Israel
| | - Anat Reiner-Benaim
- Department of Epidemiology, Biostatistics and Community Health Sciences, School of Public Health, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel
| | - Iris Shai
- Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er-Sheva, Israel
| | - Ilan Shelef
- Soroka University Medical Center, Beer-Sheva, Israel
| | - Roi Gazit
- The Shraga Segal Department for Microbiology Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er Sheva, Israel; National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Be'er Sheva, Israel; Faculty of Health Sciences, Ben-Gurion University of the Negev, Be'er-Sheva, Israel.
| |
Collapse
|
5
|
Beekman KM, Duque G, Corsi A, Tencerova M, Bisschop PH, Paccou J. Osteoporosis and Bone Marrow Adipose Tissue. Curr Osteoporos Rep 2023; 21:45-55. [PMID: 36534306 DOI: 10.1007/s11914-022-00768-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/17/2022] [Indexed: 12/23/2022]
Abstract
PURPOSE OF REVIEW This review focuses on the recent findings regarding bone marrow adipose tissue (BMAT) concerning bone health. We summarize the variations in BMAT in relation to age, sex, and skeletal sites, and provide an update on noninvasive imaging techniques to quantify human BMAT. Next, we discuss the role of BMAT in patients with osteoporosis and interventions that affect BMAT. RECENT FINDINGS There are wide individual variations with region-specific fluctuation and age- and gender-specific differences in BMAT content and composition. The Bone Marrow Adiposity Society (BMAS) recommendations aim to standardize imaging protocols to increase comparability across studies and sites. Water-fat imaging (WFI) seems an accurate and efficient alternative for spectroscopy (1H-MRS). Most studies indicate that greater BMAT is associated with lower bone mineral density (BMD) and a higher prevalence of vertebral fractures. The proton density fat fraction (PDFF) and changes in lipid composition have been associated with an increased risk of fractures independently of BMD. Therefore, PDFF and lipid composition could potentially be future imaging biomarkers for assessing fracture risk. Evidence of the inhibitory effect of osteoporosis treatments on BMAT is still limited to a few randomized controlled trials. Moreover, results from the FRAME biopsy sub-study highlight contradictory findings on the effect of the sclerostin antibody romosozumab on BMAT. Further understanding of the role(s) of BMAT will provide insight into the pathogenesis of osteoporosis and may lead to targeted preventive and therapeutic strategies.
Collapse
Affiliation(s)
- Kerensa M Beekman
- Department of Radiology and Nuclear Medicine, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Gustavo Duque
- Department of Medicine and Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada
| | - Alessandro Corsi
- Department of Molecular Medicine, Sapienza University of Rome, Rome, Italy
| | - Michaela Tencerova
- Molecular Physiology of Bone, Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Peter H Bisschop
- Department of Endocrinology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Julien Paccou
- Department of Rheumatology, MABLaB ULR 4490, CHU Lille, University Lille, Lille, France.
| |
Collapse
|
6
|
Zaffina C, Wyttenbach R, Pagnamenta A, Grasso RF, Biroli M, Del Grande F, Rizzo S. Body composition assessment: comparison of quantitative values between magnetic resonance imaging and computed tomography. Quant Imaging Med Surg 2022; 12:1450-1466. [PMID: 35111638 DOI: 10.21037/qims-21-619] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Accepted: 11/11/2021] [Indexed: 12/13/2022]
Abstract
Background The primary objective of this study was to compare measurements of skeletal muscle index (SMI), visceral adipose tissue (VAT) and subcutaneous adipose tissue (SAT) at the level of L3, on subjects who underwent computed tomography (CT) and magnetic resonance imaging (MRI) examinations within a three-month period. The secondary objective was to compare the automatic and semi-automatic quantifications of the same values for CT images. Methods Among subjects who underwent CT and MRI at our Institution between 2011 and 2020, exclusion criteria were: presence of extensive artifacts; images not including the whole waist circumference; CT acquired with low-dose technique and lack of non-contrast images. A set of three axial images (CT, MRI T1-weighted and T2-weighted) were used to extract the following measurements with semi-automatic segmentations: SMI [calculated normalizing skeletal muscle area (SMA) by the square height], SAT, VAT. For the CT images only, the same values were also calculated by using automatic segmentation. Statistical analysis was performed comparing quantitative MRI and CT measurements by Pearson correlation analysis and by Bland-Altman agreement analysis. Results A total of 123 patients were included. By performing linear regression analysis, CT and MRI measurements of SMI showed a high correlation (r2=0.81 for T1, r2=0.89 for T2), with a mean logarithmic difference between CT and MRI quantitative values of 0.041 for T1-weighted and 0.072 for T2-weighted images. CT and MRI measurements of SAT showed high correlation (r2=0.81 for T1; r2=0.81 for T2), with a mean logarithmic difference between CT and MRI values of 0.0174 for T1-weighted and 0.201 for T2-weighted images. CT and MRI measurements of VAT showed high correlation (r2=0.94 for T1; r2=0.93 for T2), with a mean logarithmic difference of 0.040 for T1-weighted and -0.084 for T2-weighted images. The comparison of values extracted by semi-automatic and automatic segmentations were highly correlated. Conclusions Quantification of body composition values at MRI from T1-weighted and T2-weighted images was highly correlated to same values at CT, therefore quantitative values of body composition among patients who underwent either one of the examinations may be compared. CT body composition values extracted by semi-automatic and automatic segmentations showed high correlation.
Collapse
Affiliation(s)
- Chiara Zaffina
- Policlinico Universitario Campus Bio-Medico di Roma, Roma, Italy
| | - Rolf Wyttenbach
- Istituto di Imaging della Svizzera Italiana (IIMSI), Ente Ospedaliero Cantonale, Lugano, Switzerland.,Facoltà di Scienze Biomediche, Università della Svizzera Italiana, Lugano, Switzerland.,Department of Diagnostic, Interventional and Pediatric Radiology (DIPR), Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Alberto Pagnamenta
- Clinical Trial Unit, Ente Ospedaliero Cantonale, Lugano, Switzerland.,Intensive Care Unit, Ente Ospedaliero Cantonale, Mendrisio, Switzerland.,Division of Pneumology, University of Geneva, Geneva, Switzerland
| | - Rosario Francesco Grasso
- Departmental Faculty of Medicine and Surgery, Unit of Interventional Radiology, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Matteo Biroli
- Humanitas University, Department of Biomedical Sciences, Pieve Emanuele, Milan, Italy
| | - Filippo Del Grande
- Istituto di Imaging della Svizzera Italiana (IIMSI), Ente Ospedaliero Cantonale, Lugano, Switzerland.,Facoltà di Scienze Biomediche, Università della Svizzera Italiana, Lugano, Switzerland
| | - Stefania Rizzo
- Istituto di Imaging della Svizzera Italiana (IIMSI), Ente Ospedaliero Cantonale, Lugano, Switzerland.,Facoltà di Scienze Biomediche, Università della Svizzera Italiana, Lugano, Switzerland
| |
Collapse
|
7
|
Machann J, Hasenbalg M, Dienes J, Wagner R, Sandforth A, Fritz V, Birkenfeld AL, Nikolaou K, Kullmann S, Schick F, Heni M. Short‐Term Variability of Proton Density Fat Fraction in Pancreas and Liver Assessed by Multiecho Chemical‐Shift Encoding‐Based
MRI
at 3 T. J Magn Reson Imaging 2022; 56:1018-1026. [DOI: 10.1002/jmri.28084] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 01/17/2022] [Accepted: 01/18/2022] [Indexed: 12/14/2022] Open
Affiliation(s)
- Jürgen Machann
- Section on Experimental Radiology, Department of Diagnostic and Interventional Radiology University Hospital Tübingen Germany
- Institute for Diabetes Research and Metabolic Diseases (IDM) of the Helmholtz Center Munich at the University of Tübingen Tübingen Germany
- German Center for Diabetes Research (DZD) Neuherberg Germany
| | - Maytee Hasenbalg
- Section on Experimental Radiology, Department of Diagnostic and Interventional Radiology University Hospital Tübingen Germany
| | - Julia Dienes
- Department of Obstetrics and Gynecology University of Tübingen Tübingen Germany
| | - Robert Wagner
- Institute for Diabetes Research and Metabolic Diseases (IDM) of the Helmholtz Center Munich at the University of Tübingen Tübingen Germany
- German Center for Diabetes Research (DZD) Neuherberg Germany
- Department of Diabetology, Endocrinology and Nephrology University Hospital Tübingen Germany
| | - Arvid Sandforth
- Institute for Diabetes Research and Metabolic Diseases (IDM) of the Helmholtz Center Munich at the University of Tübingen Tübingen Germany
- German Center for Diabetes Research (DZD) Neuherberg Germany
- Department of Diabetology, Endocrinology and Nephrology University Hospital Tübingen Germany
| | - Victor Fritz
- Section on Experimental Radiology, Department of Diagnostic and Interventional Radiology University Hospital Tübingen Germany
| | - Andreas L. Birkenfeld
- Institute for Diabetes Research and Metabolic Diseases (IDM) of the Helmholtz Center Munich at the University of Tübingen Tübingen Germany
- German Center for Diabetes Research (DZD) Neuherberg Germany
- Department of Diabetology, Endocrinology and Nephrology University Hospital Tübingen Germany
| | - Konstantin Nikolaou
- Department of Diagnostic and Interventional Radiology University Hospital Tübingen Germany
| | - Stephanie Kullmann
- Institute for Diabetes Research and Metabolic Diseases (IDM) of the Helmholtz Center Munich at the University of Tübingen Tübingen Germany
- German Center for Diabetes Research (DZD) Neuherberg Germany
- Department of Diabetology, Endocrinology and Nephrology University Hospital Tübingen Germany
| | - Fritz Schick
- Section on Experimental Radiology, Department of Diagnostic and Interventional Radiology University Hospital Tübingen Germany
| | - Martin Heni
- Institute for Diabetes Research and Metabolic Diseases (IDM) of the Helmholtz Center Munich at the University of Tübingen Tübingen Germany
- German Center for Diabetes Research (DZD) Neuherberg Germany
- Department of Diabetology, Endocrinology and Nephrology University Hospital Tübingen Germany
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine University Hospital Tübingen Tübingen Germany
| |
Collapse
|
8
|
Kalimeri M, Totman JJ, Baum T, Diefenbach MN, Hauner H, Makowski MR, Subburaj K, Cameron-Smith D, Henry CJ, Karampinos DC, Junker D. Postmenopausal Chinese-Singaporean Women Have a Higher Ratio of Visceral to Subcutaneous Adipose Tissue Volume than Caucasian Women of the Same Age and BMI. Diagnostics (Basel) 2021; 11:diagnostics11112127. [PMID: 34829474 PMCID: PMC8623581 DOI: 10.3390/diagnostics11112127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 11/10/2021] [Accepted: 11/11/2021] [Indexed: 12/04/2022] Open
Abstract
Central fat accumulation is a significant determinant of cardio-metabolic health risk, known to differ between ethnically distinct human populations. Despite evidence for preferential central adiposity in Asian populations, the proportional distribution between the subcutaneous and visceral compartments in Chinese postmenopausal women has not been thoroughly investigated. For this analysis, volumetrically quantified subcutaneous and visceral adipose tissue (SAT, VAT) in the pelvic and abdominal regions of postmenopausal Asian (Chinese-Singaporean) and Caucasian (German) women matched for age and Body Mass Index (BMI) was undertaken, to examine such differences between the two groups. Volumes were calculated from segmentations of magnetic resonance imaging datasets of the abdomen and pelvis. Despite SAT, VAT, and the corresponding total adipose tissue (TAT) being similar between the groups, VAT/SAT and VAT/TAT were higher in the Asian group (by 24.5% and 18.2%, respectively, each p = 0.02). Further, VAT/SAT and VAT/TAT were positively correlated with BMI in the Caucasian group only (p = 0.02 and p = 0.01, respectively). We concluded that VAT is proportionally higher in the non-obese Asian women, compared to the Caucasian women of matched age and BMI. This conclusion is in agreement with existing literature showing higher abdominal adiposity in Asian populations. Additionally, in the Asian group, BMI did not correlate with visceral adiposity on a significant level. Further analysis is required to examine the extent to which this increased VAT may impact cardio-metabolic health. There is, however, a need to emphasize healthy lifestyle behaviors in non-obese post-menopausal women of Chinese ancestry.
Collapse
Affiliation(s)
- Maria Kalimeri
- Clinical Imaging Research Centre, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117599, Singapore; (M.K.); (J.J.T.)
| | - John J. Totman
- Clinical Imaging Research Centre, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117599, Singapore; (M.K.); (J.J.T.)
- The Institute of Medical Imaging and Visualisation (IMIV), Bournemouth University, Bournemouth BH12 5BB, UK
| | - Thomas Baum
- Department of Diagnostic and Interventional Neuroradiology, School of Medicine, Technical University of Munich, 81675 Munich, Germany;
| | - Maximilian N. Diefenbach
- Department of Diagnostic and Interventional Radiology, School of Medicine, Technical University of Munich, 81675 Munich, Germany; (M.N.D.); (M.R.M.); (D.C.K.)
- Division of Infectious Diseases and Tropical Medicine, University Hospital, Ludwig Maximilian University of Munich, 80802 Munich, Germany
| | - Hans Hauner
- Institute for Nutritional Medicine, School of Medicine, Technical University of Munich, 80992 Munich, Germany;
- Else Kroener-Fresenius-Center of Nutritional Medicine, ZIEL Institute for Food and Health, Technical University of Munich, 85354 Freising, Germany
| | - Marcus R. Makowski
- Department of Diagnostic and Interventional Radiology, School of Medicine, Technical University of Munich, 81675 Munich, Germany; (M.N.D.); (M.R.M.); (D.C.K.)
| | - Karupppasamy Subburaj
- Engineering Product Development Pillar, Singapore University of Technology and Design, Singapore 487372, Singapore;
| | - David Cameron-Smith
- Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research, Singapore 117609, Singapore;
- Riddet Institute, Massey University, Palmerston North 4442, New Zealand
- Liggins Institute, The University of Auckland, Auckland 1023, New Zealand
| | - Christiani Jeyakumar Henry
- Clinical Nutrition Research Centre, Singapore Institute for Food and Biotechnology Innovation, Agency for Science, Technology and Research, Singapore 117599, Singapore;
| | - Dimitrios C. Karampinos
- Department of Diagnostic and Interventional Radiology, School of Medicine, Technical University of Munich, 81675 Munich, Germany; (M.N.D.); (M.R.M.); (D.C.K.)
| | - Daniela Junker
- Department of Diagnostic and Interventional Radiology, School of Medicine, Technical University of Munich, 81675 Munich, Germany; (M.N.D.); (M.R.M.); (D.C.K.)
- Correspondence: ; Tel.: +49-894-1407-058
| |
Collapse
|
9
|
Reboussin DM, Kris-Etherton PM, Lichtenstein AH, Li Z, Sabate J, Matthan NR, Petersen K, Rajaram S, Vitolins M, Ford N. The design and rationale of a multi-center randomized clinical trial comparing one avocado per day to usual diet: The Habitual Diet and Avocado Trial (HAT). Contemp Clin Trials 2021; 110:106565. [PMID: 34496276 DOI: 10.1016/j.cct.2021.106565] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 08/27/2021] [Accepted: 09/03/2021] [Indexed: 11/25/2022]
Abstract
Excess visceral adiposity is associated with increased risk of diabetes and cardiovascular disease. In the U.S. approximately 60% of adults have visceral obesity. Despite high calorie and fat, small, well-controlled clinical studies suggest that avocado consumption has favorable effects on body weight and visceral adiposity. Additionally, short-term studies also suggest that consuming avocados increases satiety, hence, may decrease overall energy intake. The Habitual Diet and Avocado Trial HAT is a multi-center, randomized, controlled trial designed to test whether in a large, diverse cohort providing one avocado per day for consumption for six months compared to a habitual diet essentially devoid of avocados, will result in a decrease in visceral adiposity as measured by magnetic resonance imaging (MRI) in individuals with an increased waist circumference (WC). Additional outcome measures include hepatic lipid content, plasma lipid profiles, blood pressure and high sensitivity C-reactive protein. Inclusion criteria were increased WC and not currently eating more than two avocados per month. Major exclusion criteria were not eating or being allergic to avocados, and not willing or able to undergo MRI scans. From June 27, 2018 to March 4, 2020, 1008 participants were randomized at 4 clinics. The cohort was 72% women, 53% Non-Hispanic White, and had a mean age of 50 years. Follow-up was completed in October 2020 when 936 participants had final MRI scans. HAT will provide information on the effects of avocado consumption on visceral fat adiposity and cardiometabolic disease risk in a diverse sample of participants.
Collapse
Affiliation(s)
- David M Reboussin
- Department of Biostatistics, Wake Forest University School of Medicine, Medical Center Boulevard, Winston-Salem, N.C. 27157, USA.
| | - Penny M Kris-Etherton
- Department of Nutritional Sciences, Penn State University, 319 Chandlee Laboratory, University Park, PA 16802, USA.
| | - Alice H Lichtenstein
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, 711 Washington Street, Boston, MA 02111, USA,.
| | - Zhaoping Li
- Center for Human Nutrition, David Geffen School of Medicine, UCLA, 200 UCLA Medical Plaza, Suite B365, Los Angeles, CA 90095, USA,.
| | - Joan Sabate
- Center for Nutrition, Lifestyle and Disease Prevention, Loma Linda University School of Public Health, 24951 North Circle Drive, Loma Linda, CA 92350, USA.
| | - Nirupa R Matthan
- Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, 711 Washington Street, Boston, MA 02111, USA,.
| | - Kristina Petersen
- Department of Nutritional Sciences, Texas Tech University, P.O. Box 41270, Lubbock, TX 79409-1270, USA.
| | - Sujatha Rajaram
- Center for Nutrition, Lifestyle and Disease Prevention, Loma Linda University School of Public Health, 24951 North Circle Drive, Loma Linda, CA 92350, USA.
| | - Mara Vitolins
- Department of Epidemiology, Wake Forest University School of Medicine, Medical Center Boulevard, Winston-Salem, N.C. 27157, USA.
| | - Nikki Ford
- Hass Avocado Board, 25212 Marguerite Parkway, Suite 250, Mission Viejo, CA 92692, USA.
| | | |
Collapse
|
10
|
Beekman KM, Akkerman EM, Streekstra GJ, Veldhuis‐Vlug AG, Acherman Y, Gerdes VE, den Heijer M, Maas M, Bravenboer N, Bisschop PH. The Effect of Roux-en-Y Gastric Bypass on Bone Marrow Adipose Tissue and Bone Mineral Density in Postmenopausal, Nondiabetic Women. Obesity (Silver Spring) 2021; 29:1120-1127. [PMID: 33951317 PMCID: PMC8359834 DOI: 10.1002/oby.23171] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 02/07/2021] [Accepted: 03/03/2021] [Indexed: 12/22/2022]
Abstract
OBJECTIVES This study aimed to determine the effect of bariatric surgery-induced weight loss on bone marrow adipose tissue (BMAT) and bone mineral density (BMD) in postmenopausal, nondiabetic women. METHODS A total of 14 postmenopausal, nondiabetic women with obesity who were scheduled for laparoscopic Roux-en-Y gastric bypass surgery (RYGB) were included in this study. Vertebral bone marrow fat signal fraction was determined by quantitative chemical shift magnetic resonance imaging, and vertebral volumetric BMD (vBMD) was determined by quantitative computed tomography before surgery and 3 and 12 months after surgery. Data were analyzed by linear mixed model. RESULTS Body weight [mean (SD)] decreased after surgery from 108 (13) kg at baseline to 89 (12) kg at 3 months and 74 (11) kg at 12 months (P < 0.001). BMAT decreased after surgery from 51% (8%) at baseline to 50% (8%) at 3 months and 46% (7%) at 12 months (P = 0.004). vBMD decreased after surgery from 101 (26) mg/cm3 at baseline to 94 (28) mg/cm3 at 3 months (P = 0.003) and 94 (28) mg/cm3 at 12 months (P = 0.035). Changes in BMAT and vBMD were not correlated (ρ = -0.10 and P = 0.75). Calcium and vitamin D concentrations did not change after surgery. CONCLUSIONS RYGB decreases both BMAT (after 12 months) and vBMD (both after 3 months and 12 months) in postmenopausal, nondiabetic women. Changes in BMAT and vBMD were not correlated. These findings suggest that BMAT does not contribute to bone loss following RYGB.
Collapse
Affiliation(s)
- Kerensa M. Beekman
- Department of Radiology and Nuclear MedicineAmsterdam Movement SciencesAmsterdam University Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
- Department of EndocrinologyAmsterdam Movement SciencesAmsterdam University Medical CenterVrije University, AmsterdamAmsterdamthe Netherlands
| | - Erik M. Akkerman
- Department of Radiology and Nuclear MedicineAmsterdam Movement SciencesAmsterdam University Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| | - Geert J. Streekstra
- Department of Radiology and Nuclear MedicineAmsterdam Movement SciencesAmsterdam University Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
- Department of Biomedical Engineering and PhysicsAmsterdam Movement SciencesAmsterdam University Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| | - Annegreet G. Veldhuis‐Vlug
- Department of Internal MedicineJan van Goyen Medical Center/Onze Lieve Vrouwe GasthuisAmsterdamthe Netherlands
- Department of EndocrinologyLeiden University Medical CenterLeidenthe Netherlands
| | - Yair Acherman
- Department of SurgerySpaarne GasthuisHaarlemthe Netherlands
| | - Victor E. Gerdes
- Department of Vascular MedicineAmsterdam University Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| | - Martin den Heijer
- Department of EndocrinologyAmsterdam Movement SciencesAmsterdam University Medical CenterVrije University, AmsterdamAmsterdamthe Netherlands
| | - Mario Maas
- Department of Radiology and Nuclear MedicineAmsterdam Movement SciencesAmsterdam University Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| | - Nathalie Bravenboer
- Department of EndocrinologyLeiden University Medical CenterLeidenthe Netherlands
- Department of Clinical ChemistryResearch Laboratory Bone and Calcium MetabolismAmsterdam Movement SciencesAmsterdam University Medical CenterVrije University, AmsterdamAmsterdamthe Netherlands
| | - Peter H. Bisschop
- Department of EndocrinologyAmsterdam Movement SciencesAmsterdam University Medical CenterUniversity of AmsterdamAmsterdamthe Netherlands
| |
Collapse
|
11
|
Abstract
Research examining bone marrow adipose tissue (BMAT) has rapidly expanded during the last two decades, leading to advances in knowledge on the role of BMAT in the pathogenesis of bone loss and endocrine disorders. Clinical imaging has played a crucial role for the in vivo assessment of BMAT, allowing non-invasive quantification and evaluation of BMAT composition. In the present work, we review different imaging methods for assessing properties of BMAT. Our aim is to review conventional magnetic resonance imaging (MRI), water-fat imaging, and single-voxel proton magnetic resonance spectroscopy (1H-MRS), as well as computed tomography (CT)-based techniques, including single energy and dual energy CT. We will also discuss the clinical applications of these methods in type 2 diabetes mellitus, obesity and anorexia nervosa.
Collapse
Affiliation(s)
- Mohamed Jarraya
- Massachusetts General Hospital, Department of Radiology, Harvard Medical School, Boston, MA, USA.
| | - Miriam A Bredella
- Massachusetts General Hospital, Department of Radiology, Harvard Medical School, Boston, MA, USA
| |
Collapse
|
12
|
Soldati E, Rossi F, Vicente J, Guenoun D, Pithioux M, Iotti S, Malucelli E, Bendahan D. Survey of MRI Usefulness for the Clinical Assessment of Bone Microstructure. Int J Mol Sci 2021; 22:2509. [PMID: 33801539 PMCID: PMC7958958 DOI: 10.3390/ijms22052509] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 02/21/2021] [Accepted: 02/25/2021] [Indexed: 12/12/2022] Open
Abstract
Bone microarchitecture has been shown to provide useful information regarding the evaluation of skeleton quality with an added value to areal bone mineral density, which can be used for the diagnosis of several bone diseases. Bone mineral density estimated from dual-energy X-ray absorptiometry (DXA) has shown to be a limited tool to identify patients' risk stratification and therapy delivery. Magnetic resonance imaging (MRI) has been proposed as another technique to assess bone quality and fracture risk by evaluating the bone structure and microarchitecture. To date, MRI is the only completely non-invasive and non-ionizing imaging modality that can assess both cortical and trabecular bone in vivo. In this review article, we reported a survey regarding the clinically relevant information MRI could provide for the assessment of the inner trabecular morphology of different bone segments. The last section will be devoted to the upcoming MRI applications (MR spectroscopy and chemical shift encoding MRI, solid state MRI and quantitative susceptibility mapping), which could provide additional biomarkers for the assessment of bone microarchitecture.
Collapse
Affiliation(s)
- Enrico Soldati
- CRMBM, CNRS, Aix Marseille University, 13385 Marseille, France;
- IUSTI, CNRS, Aix Marseille University, 13013 Marseille, France;
- ISM, CNRS, Aix Marseille University, 13288 Marseille, France; (D.G.); (M.P.)
| | - Francesca Rossi
- Department of Pharmacy and Biotechnology, University of Bologna, 40126 Bologna, Italy; (F.R.); (S.I.); (E.M.)
| | - Jerome Vicente
- IUSTI, CNRS, Aix Marseille University, 13013 Marseille, France;
| | - Daphne Guenoun
- ISM, CNRS, Aix Marseille University, 13288 Marseille, France; (D.G.); (M.P.)
- Department of Radiology, Institute for Locomotion, Saint-Marguerite Hospital, ISM, CNRS, APHM, Aix Marseille University, 13274 Marseille, France
| | - Martine Pithioux
- ISM, CNRS, Aix Marseille University, 13288 Marseille, France; (D.G.); (M.P.)
- Department of Orthopedics and Traumatology, Institute for Locomotion, Saint-Marguerite Hospital, ISM, CNRS, APHM, Aix Marseille University, 13274 Marseille, France
| | - Stefano Iotti
- Department of Pharmacy and Biotechnology, University of Bologna, 40126 Bologna, Italy; (F.R.); (S.I.); (E.M.)
- National Institute of Biostructures and Biosystems, 00136 Rome, Italy
| | - Emil Malucelli
- Department of Pharmacy and Biotechnology, University of Bologna, 40126 Bologna, Italy; (F.R.); (S.I.); (E.M.)
| | - David Bendahan
- CRMBM, CNRS, Aix Marseille University, 13385 Marseille, France;
| |
Collapse
|
13
|
Ruschke S, Syväri J, Dieckmeyer M, Junker D, Makowski MR, Baum T, Karampinos DC. Physiological variation of the vertebral bone marrow water T2 relaxation time. NMR IN BIOMEDICINE 2021; 34:e4439. [PMID: 33205520 DOI: 10.1002/nbm.4439] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 10/09/2020] [Accepted: 10/14/2020] [Indexed: 06/11/2023]
Abstract
The aim of this study was to investigate physiological variations of the water T2 relaxation time in vertebral bone marrow with respect to age, body mass index (BMI), sex and proton density fat fraction (PDFF) based on single-voxel magnetic resonance spectroscopy (MRS) at 3 T. Multi-TE single-voxel STEAM MRS data of a single lumbar vertebra (L4 or L5) from 260 subjects (160/100 female/male, age: 0.7/37.1/77.7 years, BMI: 13.6/26.2/44.5 kg/m2 [min./median/max.]) with no history of vertebral bone marrow pathologies were retrospectively included. All data were processed using a joint series T2-constrained time domain-based water-fat model. Water T2 and PDFF data were analyzed using (a) Pearson's correlation r and (b) multiple linear regression without interactions of the independent variables. Min./median/max. water T2 and PDFF were 11.2/21.1/42.5 ms and 4.0%/36.8%/82.0%, respectively. Pearson's correlation coefficients were significant (P < .05) for water T2 versus age (r = -0.429/-0.210 female/male) and for water T2 versus PDFF (r = -0.580/-0.546 female/male) for females and males, respectively. Females showed significant higher water T2 values compared with males (P < .001). Multiple linear regression for water T2 without interactions revealed a R2 = 0.407 with PDFF (P < .001) and sex (P < .001) as significant predictors. The current study suggests that under physiological conditions vertebral bone marrow water T2 is negatively correlated with age and PDFF and shows significant differences between females and males. The observed systematic trends are of relevance for the evaluation of T2 values and T2-weighted bone marrow parameters. Further research on the exact mechanisms and drivers of the observed water T2 behavior is required.
Collapse
Affiliation(s)
- Stefan Ruschke
- Department of Diagnostic and Interventional Radiology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Jan Syväri
- Department of Diagnostic and Interventional Radiology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Michael Dieckmeyer
- Department of Diagnostic and Interventional Neuroradiology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Daniela Junker
- Department of Diagnostic and Interventional Radiology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Marcus R Makowski
- Department of Diagnostic and Interventional Radiology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Thomas Baum
- Department of Diagnostic and Interventional Neuroradiology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Dimitrios C Karampinos
- Department of Diagnostic and Interventional Radiology, School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| |
Collapse
|
14
|
Little-Letsinger SE, Pagnotti GM, McGrath C, Styner M. Exercise and Diet: Uncovering Prospective Mediators of Skeletal Fragility in Bone and Marrow Adipose Tissue. Curr Osteoporos Rep 2020; 18:774-789. [PMID: 33068251 PMCID: PMC7736569 DOI: 10.1007/s11914-020-00634-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/29/2020] [Indexed: 02/07/2023]
Abstract
PURPOSE OF REVIEW To highlight recent basic, translational, and clinical works demonstrating exercise and diet regulation of marrow adipose tissue (MAT) and bone and how this informs current understanding of the relationship between marrow adiposity and musculoskeletal health. RECENT FINDINGS Marrow adipocytes accumulate in the bone in the setting of not only hypercaloric intake (calorie excess; e.g., diet-induced obesity) but also with hypocaloric intake (calorie restriction; e.g., anorexia), despite the fact that these states affect bone differently. With hypercaloric intake, bone quantity is largely unaffected, whereas with hypocaloric intake, bone quantity and quality are greatly diminished. Voluntary running exercise in rodents was found to lower MAT and promote bone in eucaloric and hypercaloric states, while degrading bone in hypocaloric states, suggesting differential modulation of MAT and bone, dependent upon whole-body energy status. Energy status alters bone metabolism and bioenergetics via substrate availability or excess, which plays a key role in the response of bone and MAT to mechanical stimuli. Marrow adipose tissue (MAT) is a fat depot with a potential role in-as well as responsivity to-whole-body energy metabolism. Understanding the localized function of this depot in bone cell bioenergetics and substrate storage, principally in the exercised state, will aid to uncover putative therapeutic targets for skeletal fragility.
Collapse
Affiliation(s)
- Sarah E Little-Letsinger
- Department of Medicine, Division of Endocrinology & Metabolism, University of North Carolina, Chapel Hill, NC, USA.
| | - Gabriel M Pagnotti
- Department of Medicine, Division of Endocrinology, Indiana University, Indianapolis, IN, USA
| | - Cody McGrath
- Department of Medicine, Division of Endocrinology & Metabolism, University of North Carolina, Chapel Hill, NC, USA
| | - Maya Styner
- Department of Medicine, Division of Endocrinology & Metabolism, University of North Carolina, Chapel Hill, NC, USA
| |
Collapse
|
15
|
Bao J, Zhuang Y, Chen Z, Cheng J, Zhong J. Detection of fatty acid composition of trabecular bone marrow by localized iDQC MRS at 3 T: A pilot study in healthy volunteers. Magn Reson Imaging 2020; 77:28-35. [PMID: 32926992 DOI: 10.1016/j.mri.2020.09.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 09/08/2020] [Accepted: 09/08/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND Although a growing body of research shows that the bone marrow adipose tissue (BMAT) may play an essential role in bone inflammation and energy metabolism, available noninvasive methods for distinguishing different fatty acids in BMAT are still limited, in spite of their potential to provide novel biomarkers for bone related diseases. PURPOSE To assess the ability of a localized intermolecular double quantum coherence (iDQC) spectroscopy sequence to resolve more fatty acid peaks than conventional MR spectroscopy (MRS), like polyunsaturated fatty acids (PUFA), from the human BMAT in the presence of trabecular bone; To preliminarily investigate whether the fatty acids composition is different between different regions and groups. RESULTS Compared with conventional MRS results, additional four fatty acids peaks were well resolved using the proposed method in human BMAT in the presence of trabecular bone. In addition, a different fat composition was found between distal femur and proximal tibia: fat was more unsaturated (vinyl, *p < 0.01; diallylic, *p < 0.01) in distal femur bone marrow than in proximal tibia, and this higher unsaturation level was caused by PUFA (r = 0.67, diallylic, *p < 0.01). No significant difference in fatty acid composition were found either between left and right legs, or between female and male in the healthy young subjects studied. CONCLUSION This study demonstrated that the unsaturated fatty acids information of human BMAT in the presence of trabecular bone can be clearly identified with the localized iDQC at 3 T. The resolved peaks, especially PUFA, may serve as additional diagnostic biomarkers for BMAT related diseases in the future.
Collapse
Affiliation(s)
- Jianfeng Bao
- Department of Magnetic Resonance Imaging, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou 450000, China
| | - Yuchuan Zhuang
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester 14627, USA
| | - Zhong Chen
- Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance Research, Xiamen University, Xiamen 361000, China
| | - Jingliang Cheng
- Department of Magnetic Resonance Imaging, The First Affiliated Hospital of Zhengzhou University, Zhengzhou University, Zhengzhou 450000, China.
| | - Jianhui Zhong
- Department of Imaging Sciences, University of Rochester Medical Center, Rochester 14627, USA.
| |
Collapse
|
16
|
Bone marrow fat: friend or foe in people with diabetes mellitus? Clin Sci (Lond) 2020; 134:1031-1048. [PMID: 32337536 DOI: 10.1042/cs20200220] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 04/15/2020] [Accepted: 04/20/2020] [Indexed: 12/22/2022]
Abstract
Global trends in the prevalence of overweight and obesity put the adipocyte in the focus of huge medical interest. This review highlights a new topic in adipose tissue biology, namely the emerging pathogenic role of fat accumulation in bone marrow (BM). Specifically, we summarize current knowledge about the origin and function of BM adipose tissue (BMAT), provide evidence for the association of excess BMAT with diabetes and related cardiovascular complications, and discuss potential therapeutic approaches to correct BMAT dysfunction. There is still a significant uncertainty about the origins and function of BMAT, although several subpopulations of stromal cells have been suggested to have an adipogenic propensity. BM adipocytes are higly plastic and have a distinctive capacity to secrete adipokines that exert local and endocrine functions. BM adiposity is abundant in elderly people and has therefore been interpreted as a component of the whole-body ageing process. BM senescence and BMAT accumulation has been also reported in patients and animal models with Type 2 diabetes, being more pronounced in those with ischaemic complications. Understanding the mechanisms responsible for excess and altered function of BMAT could lead to new treatments able to preserve whole-body homeostasis.
Collapse
|
17
|
Kahn CR, Wang G, Lee KY. Altered adipose tissue and adipocyte function in the pathogenesis of metabolic syndrome. J Clin Invest 2020; 129:3990-4000. [PMID: 31573548 DOI: 10.1172/jci129187] [Citation(s) in RCA: 360] [Impact Index Per Article: 90.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Over the past decade, great progress has been made in understanding the complexity of adipose tissue biology and its role in metabolism. This includes new insights into the multiple layers of adipose tissue heterogeneity, not only differences between white and brown adipocytes, but also differences in white adipose tissue at the depot level and even heterogeneity of white adipocytes within a single depot. These inter- and intra-depot differences in adipocytes are developmentally programmed and contribute to the wide range of effects observed in disorders with fat excess (overweight/obesity) or fat loss (lipodystrophy). Recent studies also highlight the underappreciated dynamic nature of adipose tissue, including potential to undergo rapid turnover and dedifferentiation and as a source of stem cells. Finally, we explore the rapidly expanding field of adipose tissue as an endocrine organ, and how adipose tissue communicates with other tissues to regulate systemic metabolism both centrally and peripherally through secretion of adipocyte-derived peptide hormones, inflammatory mediators, signaling lipids, and miRNAs packaged in exosomes. Together these attributes and complexities create a robust, multidimensional signaling network that is central to metabolic homeostasis.
Collapse
Affiliation(s)
- C Ronald Kahn
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Guoxiao Wang
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Kevin Y Lee
- Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, and.,The Diabetes Institute, Ohio University, Athens, Ohio, USA
| |
Collapse
|
18
|
Spurny M, Jiang Y, Sowah SA, Schübel R, Nonnenmacher T, Bertheau R, Kirsten R, Johnson T, Hillengass J, Schlett CL, von Stackelberg O, Ulrich CM, Kaaks R, Kauczor HU, Kühn T, Nattenmüller J. Changes in Bone Marrow Fat upon Dietary-Induced Weight Loss. Nutrients 2020; 12:nu12051509. [PMID: 32455947 PMCID: PMC7284630 DOI: 10.3390/nu12051509] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 05/09/2020] [Accepted: 05/18/2020] [Indexed: 12/12/2022] Open
Abstract
Background: Bone marrow fat is implicated in metabolism, bone health and haematological diseases. Thus, this study aims to analyse the impact of moderate weight loss on bone marrow fat content (BMFC) in obese, healthy individuals. Methods: Data of the HELENA-Trial (Healthy nutrition and energy restriction as cancer prevention strategies: a randomized controlled intervention trial), a randomized controlled trial (RCT) among 137 non-smoking, overweight or obese participants, were analysed to quantify the Magnetic Resonance Imaging (MRI)-derived BMFC at baseline, after a 12-week dietary intervention phase, and after a 50-week follow-up. The study cohort was classified into quartiles based on changes in body weight between baseline and week 12. Changes in BMFC in respect of weight loss were analysed by linear mixed models. Spearman’s coefficients were used to assess correlations between anthropometric parameters, blood biochemical markers, blood cells and BMFC. Results: Relative changes in BMFC from baseline to week 12 were 0.0 ± 0.2%, −3.2 ± 0.1%, −6.1 ± 0.2% and −11.5 ± 0.6% for Q1 to Q4. Across all four quartiles and for the two-group comparison, Q1 versus Q4, there was a significant difference (p < 0.05) for changes in BMFC. BMFC was not associated with blood cell counts and showed only weaker correlations (<0.3) with metabolic biomarkers. Conclusion: Weight loss is associated with a decrease of BMFC. However, BMFC showed no stronger associations with inflammatory and metabolic biomarkers.
Collapse
Affiliation(s)
- Manuela Spurny
- Heidelberg University Hospital, Diagnostic and Interventional Radiology, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany; (M.S.); (Y.J.); (R.S.); (T.N.); (R.B.); (O.v.S.); (H.-U.K.)
| | - Yixin Jiang
- Heidelberg University Hospital, Diagnostic and Interventional Radiology, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany; (M.S.); (Y.J.); (R.S.); (T.N.); (R.B.); (O.v.S.); (H.-U.K.)
| | - Solomon A. Sowah
- German Cancer Research Center (DKFZ), Division of Cancer Epidemiology, Im Neuenheimer Feld 581, 69120 Heidelberg, Germany; (S.A.S.); (R.K.); (T.J.); (R.K.); (T.K.)
| | - Ruth Schübel
- Heidelberg University Hospital, Diagnostic and Interventional Radiology, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany; (M.S.); (Y.J.); (R.S.); (T.N.); (R.B.); (O.v.S.); (H.-U.K.)
- German Cancer Research Center (DKFZ), Division of Cancer Epidemiology, Im Neuenheimer Feld 581, 69120 Heidelberg, Germany; (S.A.S.); (R.K.); (T.J.); (R.K.); (T.K.)
| | - Tobias Nonnenmacher
- Heidelberg University Hospital, Diagnostic and Interventional Radiology, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany; (M.S.); (Y.J.); (R.S.); (T.N.); (R.B.); (O.v.S.); (H.-U.K.)
| | - Robert Bertheau
- Heidelberg University Hospital, Diagnostic and Interventional Radiology, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany; (M.S.); (Y.J.); (R.S.); (T.N.); (R.B.); (O.v.S.); (H.-U.K.)
| | - Romy Kirsten
- German Cancer Research Center (DKFZ), Division of Cancer Epidemiology, Im Neuenheimer Feld 581, 69120 Heidelberg, Germany; (S.A.S.); (R.K.); (T.J.); (R.K.); (T.K.)
| | - Theron Johnson
- German Cancer Research Center (DKFZ), Division of Cancer Epidemiology, Im Neuenheimer Feld 581, 69120 Heidelberg, Germany; (S.A.S.); (R.K.); (T.J.); (R.K.); (T.K.)
| | - Jens Hillengass
- Roswell Park Comprehensive Cancer Center, Elm & Carlton Streets, Buffalo, New York 14263, USA;
| | - Christopher L. Schlett
- Department of Diagnostic and Interventional Radiology, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Hugstetter Straße 55, D-79106 Freiburg, Germany;
| | - Oyunbileg von Stackelberg
- Heidelberg University Hospital, Diagnostic and Interventional Radiology, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany; (M.S.); (Y.J.); (R.S.); (T.N.); (R.B.); (O.v.S.); (H.-U.K.)
| | - Cornelia M. Ulrich
- Huntsman Cancer Institute and Department of Population Health Sciences, University of Utah, 2000 Circle of Hope, Salt Lake City, UT 84112-5550, USA;
| | - Rudolf Kaaks
- German Cancer Research Center (DKFZ), Division of Cancer Epidemiology, Im Neuenheimer Feld 581, 69120 Heidelberg, Germany; (S.A.S.); (R.K.); (T.J.); (R.K.); (T.K.)
| | - Hans-Ulrich Kauczor
- Heidelberg University Hospital, Diagnostic and Interventional Radiology, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany; (M.S.); (Y.J.); (R.S.); (T.N.); (R.B.); (O.v.S.); (H.-U.K.)
| | - Tilman Kühn
- German Cancer Research Center (DKFZ), Division of Cancer Epidemiology, Im Neuenheimer Feld 581, 69120 Heidelberg, Germany; (S.A.S.); (R.K.); (T.J.); (R.K.); (T.K.)
| | - Johanna Nattenmüller
- Heidelberg University Hospital, Diagnostic and Interventional Radiology, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany; (M.S.); (Y.J.); (R.S.); (T.N.); (R.B.); (O.v.S.); (H.-U.K.)
- Correspondence: ; Tel.: +49-6221-5636462
| |
Collapse
|
19
|
Than WH, Chan GCK, Ng JKC, Szeto CC. The role of obesity on chronic kidney disease development, progression, and cardiovascular complications. ADVANCES IN BIOMARKER SCIENCES AND TECHNOLOGY 2020. [DOI: 10.1016/j.abst.2020.09.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
|
20
|
Blom-Høgestøl IK, Mala T, Kristinsson JA, Hauge EM, Brunborg C, Gulseth HL, Eriksen EF. Changes in Bone Marrow Adipose Tissue One Year After Roux-en-Y Gastric Bypass: A Prospective Cohort Study. J Bone Miner Res 2019; 34:1815-1823. [PMID: 31216081 DOI: 10.1002/jbmr.3814] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 05/28/2019] [Accepted: 06/04/2019] [Indexed: 12/18/2022]
Abstract
Bone marrow adipose tissue (BMAT) has been postulated to mediate skeletal fragility in type 2 diabetes (T2D) and obesity. Roux-en-Y gastric bypass (RYGB) induces a substantial weight loss and resolution of comorbidities. However, the procedure induces increased bone turnover and fracture rates. No previous study has evaluated biopsy-measured BMAT fraction preoperatively and after RYGB. In this study, we aimed to investigate BMAT fraction of the hip in participants with and without T2D preoperatively and 1 year after RYGB and explore factors associated with BMAT change. Patients with morbid obesity scheduled for RYGB were examined preoperatively and 1 year after RYGB. Forty-four participants were included and preoperative examinations were possible in 35. Of these, 33 (94%) met for follow-up, 2 were excluded, and BMAT estimation was not possible in 1. Eighteen (60%) of the participants were females and 11 (37%) had T2D. Preoperative BMAT fraction was positively associated with glycosylated hemoglobin and negatively associated with areal bone mineral density (aBMD). After RYGB, BMAT fraction decreased from 40.4 ± 1.7% to 35.6 ± 12.8%, p = 0.042, or with mean percent change of 10.7% of preoperative BMAT fraction. Change in BMAT fraction was positively associated with change in body mass index (BMI) and total body fat. In females, we observed a mean percent reduction of 22.4 ± 19.6%, whereas in males BMAT increased with a mean percent of 6.8 ± 37.5%, p = 0.009. For males, changes in estradiol were associated with BMAT change; this was not observed for females. In participants with and without T2D, the mean percent BMAT reduction was 5.8 ± 36.9% and 13.5 ± 28.0%, respectively, p = 0.52. We conclude that a high BMAT seems to be associated with lower aBMD and poorer glycemic control in obese subjects. After RYGB, we observed a significant decrease in BMAT. The reduction in BMAT did not differ between participants with and without T2D, but appeared sex specific. © 2019 The Authors. Journal of Bone and Mineral Research Published by Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- Ingvild Kristine Blom-Høgestøl
- Department of Endocrinology, Morbid Obesity and Preventive Medicine, Oslo University Hospital, Oslo, Norway.,Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Tom Mala
- Department of Endocrinology, Morbid Obesity and Preventive Medicine, Oslo University Hospital, Oslo, Norway.,Department of Gastrointestinal Surgery and Paediatric Surgery, Oslo University Hospital, Oslo, Norway
| | - Jon A Kristinsson
- Department of Endocrinology, Morbid Obesity and Preventive Medicine, Oslo University Hospital, Oslo, Norway.,Department of Gastrointestinal Surgery and Paediatric Surgery, Oslo University Hospital, Oslo, Norway
| | - Ellen-Margrethe Hauge
- Department of Rheumatology, Aarhus University Hospital, and Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | - Cathrine Brunborg
- Oslo Centre for Biostatistics and Epidemiology, Research Support Services, Oslo University Hospital, Oslo, Norway
| | - Hanne Løvdal Gulseth
- Department of Endocrinology, Morbid Obesity and Preventive Medicine, Oslo University Hospital, Oslo, Norway.,Department of Chronic Diseases and Ageing, Norwegian Institute of Public Health, Oslo, Norway
| | - Erik Fink Eriksen
- Department of Endocrinology, Morbid Obesity and Preventive Medicine, Oslo University Hospital, Oslo, Norway.,Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| |
Collapse
|
21
|
Luong Q, Huang J, Lee KY. Deciphering White Adipose Tissue Heterogeneity. BIOLOGY 2019; 8:biology8020023. [PMID: 30978929 PMCID: PMC6628053 DOI: 10.3390/biology8020023] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Revised: 04/08/2019] [Accepted: 04/09/2019] [Indexed: 01/09/2023]
Abstract
Adipose tissue not only stores energy, but also controls metabolism through secretion of hormones, cytokines, proteins, and microRNAs that affect the function of cells and tissues throughout the body. Adipose tissue is organized into discrete depots throughout the body, and these depots are differentially associated with insulin resistance and increased risk of metabolic disease. In addition to energy-dissipating brown and beige adipocytes, recent lineage tracing studies have demonstrated that individual adipose depots are composed of white adipocytes that are derived from distinct precursor populations, giving rise to distinct subpopulations of energy-storing white adipocytes. In this review, we discuss this developmental and functional heterogeneity of white adipocytes both between and within adipose depots. In particular, we will highlight findings from our recent manuscript in which we find and characterize three major subtypes of white adipocytes. We will discuss these data relating to the differences between subcutaneous and visceral white adipose tissue and in relationship to previous work deciphering adipocyte heterogeneity within adipose tissue depots. Finally, we will discuss the possible implications of adipocyte heterogeneity may have for the understanding of lipodystrophies.
Collapse
Affiliation(s)
- Quyen Luong
- Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH 45701, USA.
- The Diabetes Institute, Ohio University, Athens, OH 45701, USA.
| | - Jun Huang
- Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH 45701, USA.
- The Diabetes Institute, Ohio University, Athens, OH 45701, USA.
| | - Kevin Y Lee
- Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH 45701, USA.
- The Diabetes Institute, Ohio University, Athens, OH 45701, USA.
| |
Collapse
|
22
|
Pescatori LC, Savarino E, Mauri G, Silvestri E, Cariati M, Sardanelli F, Sconfienza LM. Quantification of visceral adipose tissue by computed tomography and magnetic resonance imaging: reproducibility and accuracy. Radiol Bras 2019; 52:1-6. [PMID: 30804608 PMCID: PMC6383529 DOI: 10.1590/0100-3984.2017.0211] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Objective To evaluate the feasibility of quantifying visceral adipose tissue (VAT) on
computed tomography (CT) and magnetic resonance imaging (MRI) scans, using
freeware, as well as calculating intraobserver and interobserver
reproducibility. Materials and Methods We quantified VAT in patients who underwent abdominal CT and MRI at our
institution between 2010 and 2015, with a maximum of three months between
the two examinations. A slice acquired at the level of the umbilicus was
selected. Segmentation was performed with the region growing algorithm of
the freeware employed. Intraobserver and interobserver reproducibility were
evaluated, as was the accuracy of MRI in relation to that of CT. Results Thirty-one patients (14 males and 17 females; mean age of 57 ± 15
years) underwent CT and MRI (mean interval between the examinations, 28
± 12 days). The interobserver reproducibility was 82% for CT (bias =
1.52 cm2; p = 0.488), 86% for T1-weighted MRI
(bias = −4.36 cm2; p = 0.006), and 88% for
T2-weighted MRI (bias = −0.52 cm2; p = 0.735).
The intraobserver reproducibility was 90% for CT (bias = 0.14
cm2; p = 0.912), 92% for T1-weighted MRI (bias =
−3,4 cm2; p = 0.035), and 90% for T2-weighted
MRI (bias = −0.30 cm2; p = 0.887). The
reproducibility between T1-weighted MRI and T2-weighted MRI was 87% (bias =
−0.11 cm2; p = 0.957). In comparison with the
accuracy of CT, that of T1-weighted and T2-weighted MRI was 89% and 91%,
respectively. Conclusion The program employed can be used in order to quantify VAT on CT, T1-weighted
MRI, and T2-weighted MRI scans. Overall, the accuracy of MRI (in comparison
with that of CT) appears to be high, as do intraobserver and interobserver
reproducibility. However, the quantification of VAT seems to be less
reproducible in T1-weighted sequences.
Collapse
Affiliation(s)
| | | | | | | | - Maurizio Cariati
- ASST Santi Paolo e Carlo, Presidio San Carlo Borromeo, Milano, Italia
| | - Francesco Sardanelli
- Università degli Studi di Milano, Milano, Italia.,IRCCS Policlinico San Donato, San Donato Milanese, Milano, Italia
| | - Luca Maria Sconfienza
- Università degli Studi di Milano, Milano, Italia.,IRCCS Istituto Ortopedico Galeazzi, Milano, Italia
| |
Collapse
|
23
|
Abstract
Bone strength is affected not only by bone mineral density (BMD) and bone microarchitecture but also its microenvironment. Recent studies have focused on the role of marrow adipose tissue (MAT) in the pathogenesis of bone loss. Osteoblasts and adipocytes arise from a common mesenchymal stem cell within bone marrow and many osteoporotic states, including aging, medication use, immobility, over - and undernutrition are associated with increased marrow adiposity. Advancements in imaging technology allow the non-invasive quantification of MAT. This article will review magnetic resonance imaging (MRI)- and computed tomography (CT)-based imaging technologies to assess the amount and composition of MAT. The techniques that will be discussed are anatomic T1-weighted MRI, water-fat imaging, proton MR spectroscopy, single energy CT and dual energy CT. Clinical applications of MRI and CT techniques to determine the role of MAT in patients with obesity, anorexia nervosa, and type 2 diabetes will be reviewed.
Collapse
Affiliation(s)
- Vibha Singhal
- Pediatric Endocrine Unit, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, United States
| | - Miriam A Bredella
- Department of Radiology, Musculoskeletal Imaging and Interventions, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, United States.
| |
Collapse
|
24
|
Paccou J, Penel G, Chauveau C, Cortet B, Hardouin P. Marrow adiposity and bone: Review of clinical implications. Bone 2019; 118:8-15. [PMID: 29477645 DOI: 10.1016/j.bone.2018.02.008] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2017] [Revised: 02/09/2018] [Accepted: 02/13/2018] [Indexed: 12/16/2022]
Abstract
There is growing interest in the relationship between bone marrow fat (BMF) and skeletal health. Progress in clinical studies of BMF and skeletal health has been greatly enhanced by recent technical advances in our ability to measure BMF non-invasively. Magnetic resonance imagery (MRI) with or without spectroscopy is currently the standard technique for evaluating BMF content and composition in humans. This review focuses on clinical studies of marrow fat and its relationship with bone. The amount of marrow fat is associated with bone mineral density (BMD). Several studies have reported a significant negative association between marrow fat content and BMD in both healthy and osteoporotic populations. There may also be a relationship between marrow fat and fracture (mostly vertebral fracture), but data are scarce and further studies are needed. Furthermore, a few studies suggest that a lower proportion of unsaturated lipids in vertebral BMF may be associated with reduced BMD and greater prevalence of fracture. Marrow fat might be influenced by metabolic diseases associated with bone loss and fractures, such as diabetes mellitus, obesity and anorexia nervosa. An intriguing aspect of bariatric (weight loss) surgery is that it induces bone loss and fractures, but with different impacts on marrow fat depending on diabetic status. In daily practice, the usefulness for clinicians of assessing marrow fat using MRI is still limited. However, the perspectives are exciting, particularly in terms of improving the diagnosis and management of osteoporosis. Further studies are needed to better understand the regulators involved in the marrow fat-bone relationship and the links between marrow fat, other fat depots and energy metabolism.
Collapse
Affiliation(s)
- Julien Paccou
- Université de Lille, Université Littoral Côte d'Opale, PMOI EA 4490 faculté de chirurgie dentaire, place de Verdun, 59000 Lille, France; Service de rhumatologie, CHRU, 59000 Lille, France.
| | - Guillaume Penel
- Université de Lille, Université Littoral Côte d'Opale, PMOI EA 4490 faculté de chirurgie dentaire, place de Verdun, 59000 Lille, France
| | - Christophe Chauveau
- Univ. Littoral Côte d'Opale, Univ. Lille, EA 4490, PMOI, Physiopathologie des Maladies Osseuses Inflammatoires, F-62300 Boulogne-sur-Mer, France
| | - Bernard Cortet
- Université de Lille, Université Littoral Côte d'Opale, PMOI EA 4490 faculté de chirurgie dentaire, place de Verdun, 59000 Lille, France; Service de rhumatologie, CHRU, 59000 Lille, France
| | - Pierre Hardouin
- Univ. Littoral Côte d'Opale, Univ. Lille, EA 4490, PMOI, Physiopathologie des Maladies Osseuses Inflammatoires, F-62300 Boulogne-sur-Mer, France
| |
Collapse
|
25
|
Quantification of Liver Fat Content With Unenhanced MDCT: Phantom and Clinical Correlation With MRI Proton Density Fat Fraction. AJR Am J Roentgenol 2018; 211:W151-W157. [PMID: 30016142 DOI: 10.2214/ajr.17.19391] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVE The purpose of this study was to evaluate the relation between unenhanced CT liver attenuation values and MRI-derived proton density fat fraction (PDFF) for estimation of liver fat content at CT. MATERIALS AND METHODS A CT-MRI phantom was constructed and imaged containing 12 vials with lipid fractions ranging from 0% to 100%. For the retrospective clinical arm, 221 patients (120 men, 101 women; mean age, 54 years) underwent both unenhanced CT and chemical shift-encoded MRI of the liver between 2007 and 2017. Among these patients, 92 had more than one 120-kV CT scan for comparison. CT attenuation and MRI PDFF were derived with coregistered ROI measurements in the right hepatic lobe. The 120-kV subgroup of CT examinations performed within 1 month of MRI PDFF examinations (n = 72) served as the primary cohort for linear correlation. The effects of different tube voltage settings, time intervals between CT and MRI, and iron overload were assessed. Linear least squares regression analysis was performed. RESULTS Phantom results showed excellent linear fit between CT attenuation and MRI PDFF (r2 = 0.986). In patients, 120-kV CT performed within 1 month of MRI PDFF exhibited strong linear correlation (r2 = 0.828) that closely matched the phantom data, yielding the following clinical CT-MRI conversion formula: MRI PDFF (%) = -0.58 × CT attenuation (HU) + 38.2. Correlation worsened for CT-to-MRI intervals longer than 1 month (r2 = 0.565), and this specific relationship did not apply as well to non-120-kV settings (r2 = 0.554). For patients with multiple scans, correlation progressively worsened over time. CT-based liver fat content was underestimated in several patients with iron overload. CONCLUSION The linear correlation between unenhanced CT attenuation and MRI PDFF allows quantification of liver fat content by means of unenhanced CT in clinical practice. As expected, correlation worsened with increasing CT-MRI time interval, variable tube voltage settings, and iron overload.
Collapse
|
26
|
Harrison SA, Rinella ME, Abdelmalek MF, Trotter JF, Paredes AH, Arnold HL, Kugelmas M, Bashir MR, Jaros MJ, Ling L, Rossi SJ, DePaoli AM, Loomba R. NGM282 for treatment of non-alcoholic steatohepatitis: a multicentre, randomised, double-blind, placebo-controlled, phase 2 trial. Lancet 2018. [PMID: 29519502 DOI: 10.1016/s0140-6736(18)30474-4] [Citation(s) in RCA: 322] [Impact Index Per Article: 53.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Non-alcoholic steatohepatitis is a chronic liver disease characterised by the presence of hepatic steatosis, inflammation, and hepatocellular injury, for which no Food and Drug Administration (FDA)-approved treatment exists. FGF19 is a hormone that regulates bile acid synthesis and glucose homoeostasis. We aimed to assess the safety and efficacy of NGM282, an engineered FGF19 analogue, for the treatment of non-alcoholic steatohepatitis. METHODS In this randomised, double-blind, placebo-controlled, phase 2 study, we recruited patients aged 18-75 years with biopsy-confirmed non-alcoholic steatohepatitis as defined by the non-alcoholic steatohepatitis clinical research network histological scoring system, from hospitals and gastroenterology and liver clinics in Australia and the USA. Key eligibility criteria included a non-alcoholic fatty liver disease activity score of 4 or higher, stage 1-3 fibrosis, and at least 8% liver fat content. Patients were randomly assigned (1:1:1) via a web-based system and stratified by diabetic status to receive either 3 mg or 6 mg subcutaneous NGM282 or placebo. The primary endpoint was the absolute change from baseline to week 12 in liver fat content. Responders were patients who achieved a 5% or larger reduction in absolute liver fat content as measured by MRI-proton density fat fraction. Efficacy analysis was by intention to treat. This trial is registered with ClinicalTrials.gov, number NCT02443116. FINDINGS Between July 14, 2015, and Aug 30, 2016, 166 patients were screened across 18 sites in Australia and the USA. 82 patients were randomly assigned to receive 3 mg NGM282 (n=27), 6 mg NGM282 (n=28), or placebo (n=27). At 12 weeks, 20 (74%) patients in the 3 mg dose group and 22 (79%) in the 6 mg dose group achieved at least a 5% reduction in absolute liver fat content from baseline (relative risk 10·0 [95% CI 2·6-38·7] vs 11·4 [3·0-43·8], respectively; p<0·0001 for both comparisons) versus two (7%) in the placebo group. Overall, 76 (93%) of 82 patients experienced at least one adverse event, most of which were grade 1 (55 [67%]), and only five (6%) were grade 3 or worse. The most commonly (≥10%) reported adverse events were injection site reactions (28 [34%]), diarrhoea (27 [33%]), abdominal pain (15 [18%]), and nausea (14 [17%]). These adverse events were reported more frequently in the NGM282 groups compared with the placebo group. No life-threatening events or patient deaths occurred during the study. INTERPRETATION NGM282 produced rapid and significant reductions in liver fat content with an acceptable safety profile in patients with non-alcoholic steatohepatitis. Further study of NGM282 is warranted in this patient population. FUNDING NGM Biopharmaceuticals.
Collapse
Affiliation(s)
| | - Mary E Rinella
- Division of Gastroenterology and Hepatology, Northwestern University, Chicago, IL, USA
| | | | - James F Trotter
- Clinical Research and Education, Texas Digestive Disease Consultants, Dallas, TX, USA
| | - Angelo H Paredes
- Division of Gastroenterology and Hepatology, Brooke Army Medical Center, San Antonio, TX, USA
| | - Hays L Arnold
- Gastroenterology Consultants of San Antonio, Live Oak, TX, USA
| | | | - Mustafa R Bashir
- Department of Radiology, Duke University Medical Center, Durham, NC, USA
| | | | - Lei Ling
- NGM Biopharmaceuticals, Inc, San Francisco, CA, USA
| | | | | | - Rohit Loomba
- Non-Alcoholic Fatty Liver Disease Research Center, Division of Gastroenterology and Epidemiology, University of California San Diego, San Diego, CA, USA
| |
Collapse
|
27
|
Abstract
Marrow adipocytes, collectively termed marrow adipose tissue (MAT), reside in the bone marrow in close contact to bone cells and haematopoietic cells. Marrow adipocytes arise from the mesenchymal stem cell and share their origin with the osteoblast. Shifts in the lineage allocation of the mesenchymal stromal cell could potentially explain the association between increased MAT and increased fracture risk in diseases such as postmenopausal osteoporosis, anorexia nervosa and diabetes. Functionally, marrow adipocytes secrete adipokines, such as adiponectin, and cytokines, such as RANK ligand and stem cell factor. These mediators can influence both bone remodelling and haematopoiesis by promoting bone resorption and haematopoietic recovery following chemotherapy. In addition, marrow adipocytes can secrete free fatty acids, acting as a energy supply for bone and haematopoietic cells. However, this induced lipolysis is also used by neoplastic cells to promote survival and proliferation. Therefore, MAT could represent a new therapeutic target for multiple diseases from osteoporosis to leukaemia, although the exact characteristics and role of the marrow adipocyte in health and diseases remain to be determined.
Collapse
Affiliation(s)
- A G Veldhuis-Vlug
- Department of Endocrinology and Metabolism, Academic Medical Center, Amsterdam, The Netherlands
- Center for Clinical and Translational Research, Maine Medical Center Research Institute, Scarborough, ME, USA
| | - C J Rosen
- Center for Clinical and Translational Research, Maine Medical Center Research Institute, Scarborough, ME, USA
| |
Collapse
|
28
|
Lu K, Xu M, Li W, Wang K, Wang D. A study on dynamic monitoring, components, and risk factors of embolism during total knee arthroplasty. Medicine (Baltimore) 2017; 96:e9303. [PMID: 29390496 PMCID: PMC5758198 DOI: 10.1097/md.0000000000009303] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Fat embolism is a common complication of orthopedic surgery. However, the exact component and risk factor responsible for this complication remains unelucidated. This study aimed to detect the origin of the pulmonary embolus and identify relevant risk factors of pulmonary embolism in total knee replacement. METHODS A total of 40 osteoarthritis patients who underwent primary unilateral TKA were recruited into this study. Transesophageal echocardiography (TEE) was utilized to dynamically monitor the embolism. Pulmonary arterial pressure was recorded and biopsies were obtained from the medullary cavity during surgery. RESULTS After tourniquet release, the arterial embolism was observed by TEE to have a peak signal at 30 seconds when pulmonary arterial pressure was increased by 25% to 40% (P = .002). The pathology study of the embolism revealed its bone marrow origin. Total embolus quantity was positively correlated with age (P = .021), body mass index (BMI, P = .041), and fat content of the bone marrow (P = .003). Logistic regression analysis revealed that the fat content of the marrow (OR: 1.432, 95% CI: 1.335-1.592), age (OR: 1.632, 95% CI: 1.445-1.832), and BMI (OR: 1.231, 95% CI: 1.032-1.381) were risk factors for pulmonary hypertension. CONCLUSION This study revealed that the embolus detected in the right atrium was derived from bone marrow tissues, and this led to pulmonary arterial pressure fluctuations after tourniquet release. Therefore, elderly patients who have high BMI or bone marrow fat content are at high-risk for pulmonary fat embolism during TKA.
Collapse
Affiliation(s)
- Kang Lu
- Department of Joint Surgery, Liaocheng Clinical College of Taishan Medical University
| | - Mingtao Xu
- Department of Joint Surgery, Liaocheng People's Hospital, Liaocheng, Shandong, China
| | - Wei Li
- Department of Joint Surgery, Liaocheng People's Hospital, Liaocheng, Shandong, China
| | - Kai Wang
- Department of Joint Surgery, Liaocheng People's Hospital, Liaocheng, Shandong, China
| | - Dawei Wang
- Department of Joint Surgery, Liaocheng People's Hospital, Liaocheng, Shandong, China
| |
Collapse
|
29
|
Kim TY, Schwartz AV, Li X, Xu K, Black DM, Petrenko DM, Stewart L, Rogers SJ, Posselt AM, Carter JT, Shoback DM, Schafer AL. Bone Marrow Fat Changes After Gastric Bypass Surgery Are Associated With Loss of Bone Mass. J Bone Miner Res 2017; 32:2239-2247. [PMID: 28791737 PMCID: PMC5685913 DOI: 10.1002/jbmr.3212] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 06/19/2017] [Accepted: 06/26/2017] [Indexed: 12/22/2022]
Abstract
Bone marrow fat is a unique fat depot that may regulate bone metabolism. Marrow fat is increased in states of low bone mass, severe underweight, and diabetes. However, longitudinal effects of weight loss and improved glucose homeostasis on marrow fat are unclear, as is the relationship between marrow fat and bone mineral density (BMD) changes. We hypothesized that after Roux-en-Y gastric bypass (RYGB) surgery, marrow fat changes are associated with BMD loss. We enrolled 30 obese women, stratified by diabetes status. Before and 6 months after RYGB, we measured BMD by dual-energy X-ray absorptiometry (DXA) and quantitative computed tomography (QCT) and vertebral marrow fat content by magnetic resonance spectroscopy. At baseline, those with higher marrow fat had lower BMD. Postoperatively, total body fat declined dramatically in all participants. Effects of RYGB on marrow fat differed by diabetes status (p = 0.03). Nondiabetic women showed no significant mean change in marrow fat (+1.8%, 95% confidence interval [CI] -1.8% to +5.4%, p = 0.29), although those who lost more total body fat were more likely to have marrow fat increases (r = -0.70, p = 0.01). In contrast, diabetic women demonstrated a mean marrow fat change of -6.5% (95% CI -13.1% to 0%, p = 0.05). Overall, those with greater improvements in hemoglobin A1c had decreases in marrow fat (r = 0.50, p = 0.01). Increases in IGF-1, a potential mediator of the marrow fat-bone relationship, were associated with marrow fat declines (r = -0.40, p = 0.05). Spinal volumetric BMD decreased by 6.4% ± 5.9% (p < 0.01), and femoral neck areal BMD decreased by 4.3% ± 4.1% (p < 0.01). Marrow fat and BMD changes were negatively associated, such that those with marrow fat increases had more BMD loss at both spine (r = -0.58, p < 0.01) and femoral neck (r = -0.49, p = 0.01), independent of age and menopause. Our findings suggest that glucose metabolism and weight loss may influence marrow fat behavior, and marrow fat may be a determinant of bone metabolism. © 2017 American Society for Bone and Mineral Research.
Collapse
Affiliation(s)
- Tiffany Y Kim
- Department of Medicine, University of California, San Francisco, CA, USA
- Endocrine Research Unit, San Francisco Veterans Affairs Health Care System, San Francisco, CA, USA
| | - Ann V Schwartz
- Department of Epidemiology and Biostatistics, University of California, San Francisco, CA, USA
| | - Xiaojuan Li
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA, USA
| | - Kaipin Xu
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, CA, USA
| | - Dennis M Black
- Department of Epidemiology and Biostatistics, University of California, San Francisco, CA, USA
| | - Dimitry M Petrenko
- Department of Medicine, University of California, San Francisco, CA, USA
- Endocrine Research Unit, San Francisco Veterans Affairs Health Care System, San Francisco, CA, USA
| | - Lygia Stewart
- Department of Surgery, University of California, San Francisco, CA, USA
- Surgical Service, San Francisco Veterans Affairs Health Care System, San Francisco, CA, USA
| | - Stanley J Rogers
- Department of Surgery, University of California, San Francisco, CA, USA
| | - Andrew M Posselt
- Department of Surgery, University of California, San Francisco, CA, USA
| | - Jonathan T Carter
- Department of Surgery, University of California, San Francisco, CA, USA
| | - Dolores M Shoback
- Department of Medicine, University of California, San Francisco, CA, USA
- Endocrine Research Unit, San Francisco Veterans Affairs Health Care System, San Francisco, CA, USA
| | - Anne L Schafer
- Department of Medicine, University of California, San Francisco, CA, USA
- Endocrine Research Unit, San Francisco Veterans Affairs Health Care System, San Francisco, CA, USA
- Department of Epidemiology and Biostatistics, University of California, San Francisco, CA, USA
| |
Collapse
|
30
|
Abstract
There is considerable interest in the physiology and pathology, as well as the cellular and molecular biology, of bone marrow adipose tissue (BMAT). Because bone marrow adiposity is linked not only to systemic energy metabolism, but also to both bone marrow and musculoskeletal disorders, this biologic compartment has become of major interest to investigators from diverse disciplines. Bone marrow adiposity represents a virtual multi-tissue endocrine organ, which encompasses cells from multiple developmental lineages (e.g., mesenchymal, myeloid, lymphoid) and occupies all the non-osseous and non-cartilaginous space within long bones. A number of research groups are now focusing on bone marrow adiposity to understand a range of clinical afflictions associated with bone marrow disorders and to consider mechanisms-based strategies for future therapies.
Collapse
Affiliation(s)
- Bram van der Eerden
- Erasmus MC, Department of Internal Medicine, Laboratory for Calcium and Bone Metabolism, Rotterdam, the Netherlands
| | - André van Wijnen
- Mayo Clinic, Department of Orthopedic Surgery and Biochemistry & Molecular Biology, Rochester, MN, USA
| |
Collapse
|
31
|
Franz D, Weidlich D, Freitag F, Holzapfel C, Drabsch T, Baum T, Eggers H, Witte A, Rummeny EJ, Hauner H, Karampinos DC. Association of proton density fat fraction in adipose tissue with imaging-based and anthropometric obesity markers in adults. Int J Obes (Lond) 2017; 42:175-182. [PMID: 28894290 PMCID: PMC5737837 DOI: 10.1038/ijo.2017.194] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 06/30/2017] [Accepted: 08/02/2017] [Indexed: 12/31/2022]
Abstract
Background/Objectives: The purpose of this study was to examine the relationship of the proton density fat fraction (PDFF), measured by magnetic resonance imaging (MRI), of supraclavicular and gluteal adipose tissue with subcutaneous and visceral adipose tissue (SAT and VAT) volumes, liver fat fraction and anthropometric obesity markers. The supraclavicular fossa was selected as a typical location where brown adipocytes may be present in humans and the gluteal region was selected as a typical location enclosing primarily white adipocytes. Subjects/Methods: In this cross-sectional study, 61 adults (44 women, median age 29.3 years, range 21–68 years) underwent an MRI examination of the neck and the abdomen/pelvis (3T, Ingenia, Philips Healthcare). PDFF maps of the supraclavicular and gluteal adipose tissue and the liver were generated. Volumes of SAT and VAT were calculated and supraclavicular and subcutaneous fat were segmented using custom-built post-processing algorithms. Body mass index (BMI), waist circumference and waist-to-height ratio were recorded. Statistical analysis was conducted using the Student's t-test and Pearson correlation analysis. Results: Mean supraclavicular PDFF was 75.3±4.7% (range 65.4–83.8%) and mean gluteal PDFF was 89.7±2.9% (range 82.2-94%), resulting in a significant difference (P<0.0001). Supraclavicular PDFF was positively correlated with VAT (r=0.76, P<0.0001), SAT (r=0.73, P<0.0001), liver PDFF (r=0.42, P=0.0008) and all measured anthropometric obesity markers. Gluteal subcutaneous PDFF also correlated with VAT (r=0.59, P<0.0001), SAT (r=0.63, P<0.0001), liver PDFF (r=0.3, P=0.02) and anthropometric obesity markers. Conclusions: The positive correlations between adipose tissue PDFF and imaging, as well as anthropometric obesity markers suggest that adipose tissue PDFF may be useful as a biomarker for improving the characterization of the obese phenotype, for risk stratification and for selection of appropriate treatment strategies.
Collapse
Affiliation(s)
- D Franz
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - D Weidlich
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - F Freitag
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - C Holzapfel
- Institute for Nutritional Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - T Drabsch
- Institute for Nutritional Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - T Baum
- Department of Diagnostic and Interventional Neuroradiology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - H Eggers
- Philips Research Laboratory, Hamburg, Germany
| | - A Witte
- FOM University of Applied Sciences, Essen, Germany
| | - E J Rummeny
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - H Hauner
- Institute for Nutritional Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - D C Karampinos
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| |
Collapse
|
32
|
Karampinos DC, Ruschke S, Dieckmeyer M, Diefenbach M, Franz D, Gersing AS, Krug R, Baum T. Quantitative MRI and spectroscopy of bone marrow. J Magn Reson Imaging 2017; 47:332-353. [PMID: 28570033 PMCID: PMC5811907 DOI: 10.1002/jmri.25769] [Citation(s) in RCA: 167] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 05/05/2017] [Indexed: 12/13/2022] Open
Abstract
Bone marrow is one of the largest organs in the human body, enclosing adipocytes, hematopoietic stem cells, which are responsible for blood cell production, and mesenchymal stem cells, which are responsible for the production of adipocytes and bone cells. Magnetic resonance imaging (MRI) is the ideal imaging modality to monitor bone marrow changes in healthy and pathological states, thanks to its inherent rich soft‐tissue contrast. Quantitative bone marrow MRI and magnetic resonance spectroscopy (MRS) techniques have been also developed in order to quantify changes in bone marrow water–fat composition, cellularity and perfusion in different pathologies, and to assist in understanding the role of bone marrow in the pathophysiology of systemic diseases (e.g. osteoporosis). The present review summarizes a large selection of studies published until March 2017 in proton‐based quantitative MRI and MRS of bone marrow. Some basic knowledge about bone marrow anatomy and physiology is first reviewed. The most important technical aspects of quantitative MR methods measuring bone marrow water–fat composition, fatty acid composition, perfusion, and diffusion are then described. Finally, previous MR studies are reviewed on the application of quantitative MR techniques in both healthy aging and diseased bone marrow affected by osteoporosis, fractures, metabolic diseases, multiple myeloma, and bone metastases. Level of Evidence: 3 Technical Efficacy: Stage 2 J. Magn. Reson. Imaging 2018;47:332–353.
Collapse
Affiliation(s)
- Dimitrios C Karampinos
- Department of Diagnostic and Interventional Radiology, Technical University of Munich, Munich, Germany
| | - Stefan Ruschke
- Department of Diagnostic and Interventional Radiology, Technical University of Munich, Munich, Germany
| | - Michael Dieckmeyer
- Department of Diagnostic and Interventional Radiology, Technical University of Munich, Munich, Germany
| | - Maximilian Diefenbach
- Department of Diagnostic and Interventional Radiology, Technical University of Munich, Munich, Germany
| | - Daniela Franz
- Department of Diagnostic and Interventional Radiology, Technical University of Munich, Munich, Germany
| | - Alexandra S Gersing
- Department of Diagnostic and Interventional Radiology, Technical University of Munich, Munich, Germany
| | - Roland Krug
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California, USA
| | - Thomas Baum
- Section for Diagnostic and Interventional Neuroradiology, Technical University of Munich, Munich, Germany
| |
Collapse
|
33
|
Measurement of vertebral bone marrow proton density fat fraction in children using quantitative water-fat MRI. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2017; 30:449-460. [PMID: 28382554 DOI: 10.1007/s10334-017-0617-0] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 03/23/2017] [Accepted: 03/24/2017] [Indexed: 12/21/2022]
Abstract
OBJECTIVES To investigate the feasibility of employing a 3D time-interleaved multi-echo gradient-echo (TIMGRE) sequence to measure the proton density fat fraction (PDFF) in the vertebral bone marrow (VBM) of children and to examine cross-sectional changes with age and intra-individual variations from the lumbar to the cervical region in the first two decades of life. MATERIALS AND METHODS Quantitative water-fat imaging of the spine was performed in 93 patients (49 girls; 44 boys; age median 4.5 years; range 0.1-17.6 years). For data acquisition, a six-echo 3D TIMGRE sequence was used with phase correction and complex-based water-fat separation. Additionally, single-voxel MR spectroscopy (MRS) was performed in the L4 vertebrae of 37 patients. VBM was manually segmented in the midsagittal slice of each vertebra. Univariable and multivariable linear regression models were calculated between averaged lumbar, thoracic and cervical bone marrow PDFF and age with adjustments for sex, height, weight, and body mass index percentile. RESULTS Measured VBM PDFF correlated strongly between imaging and MRS (R 2 = 0.92, slope = 0.94, intercept = -0.72%). Lumbar, thoracic and cervical VBM PDFF correlated significantly (all p < 0.001) with the natural logarithm of age. Differences between female and male patients were not significant (p > 0.05). CONCLUSION VBM development in children showed a sex-independent cross-sectional increase of PDFF correlating with the natural logarithm of age and an intra-individual decrease of PDFF from the lumbar to the cervical region in all age groups. The present results demonstrate the feasibility of using a 3D TIMGRE sequence for PDFF assessment in VBM of children.
Collapse
|
34
|
Veldhuis-Vlug AG, Rosen CJ. Mechanisms of marrow adiposity and its implications for skeletal health. Metabolism 2017; 67:106-114. [PMID: 28081773 PMCID: PMC5325679 DOI: 10.1016/j.metabol.2016.11.013] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 11/02/2016] [Accepted: 11/22/2016] [Indexed: 12/11/2022]
Abstract
The bone marrow niche is composed of cells from hematopoietic and mesenchymal origin. Both require energy to power differentiation and these processes are intimately connected to systemic metabolic homeostasis. Glycolysis is the preferred substrate for mesenchymal stromal cells in the niche, although fatty acid oxidation and glutaminolysis are important during stage specific differentiation. Autophagy and lipophagy, in part triggered by adenosine monophosphate-activated protein kinase (AMPK), may also play an important but temporal specific role in osteoblast differentiation. Enhanced marrow adiposity is caused by clinical factors that are genetically, environmentally, and hormonally mediated. These determinants mediate a switch from the osteogenic to the adipogenic lineage. Preliminary evidence supports an important role for fuel utilization in those cell fate decisions. Although both the origin and function of the marrow adipocyte remain to be determined, and in some genetic mouse models high marrow adiposity may co-exist with greater bone mass, in humans changes in marrow adiposity are closely linked to adverse changes in skeletal metabolism. This supports an intimate relationship between bone and fat in the marrow. Future studies will likely shed more light on the relationship of cellular as well as whole body metabolism on the ultimate fate of bone marrow stromal cells.
Collapse
|
35
|
Li G, Xu Z, Yuan W, Chang S, Chen Y, Calimente H, Hu J. Short- and midterm reproducibility of marrow fat measurements using mDixon imaging in healthy postmenopausal women. Skeletal Radiol 2016; 45:1385-90. [PMID: 27502625 DOI: 10.1007/s00256-016-2448-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 07/05/2016] [Accepted: 07/26/2016] [Indexed: 02/07/2023]
Abstract
OBJECTIVE We tested the short- and midterm reproducibility of vertebral marrow fat fraction (FF) measurements using mDixon imaging. MATERIALS AND METHODS Thirty postmenopausal women underwent mDixon scans to obtain L1-4 FF from three slices per vertebra by two independent observers (session 1). Measurements were repeated after 6 weeks (session 2) and 6 months (session 3). The mean FF for three regions of interest per vertebra was calculated. The coefficients of variation (CVs) were calculated for each participant and imaging session, and the intraclass correlation coefficients (ICCs) were calculated to assess interobserver and intersession agreements. RESULTS There were no significant differences in FF measurements among the three slices, imaging sessions or observers. The mean intrasubject CV for FF measurement reproducibility was 1.94 %. The interobserver agreement for the average FF value was excellent (ICC ≥0.945 for each session). The ICC for intersession agreement was excellent (ICC ≥0.955 between sessions). The mean intersession CV was lower within a short-term interval (2.97 %) than within sessions 1 and 3 (4.80 %) or sessions 3 and 2 (4.44 %). The overall mean CV for the reproducibility of FF measured with mDixon imaging over the short- and midterm was 4.09 % (95 % CI, 3.79-4.40 %). CONCLUSION mDixon is a reproducible method for FF quantification over short- and midterm intervals up to 6 months in healthy postmenopausal women. Our results also provide data by which a power analysis can be optimized when designing studies involving the use of FF derived from similar mDixon sequences.
Collapse
Affiliation(s)
- Guanwu Li
- Department of Radiology, Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, 110 Ganhe Rd, Hongkou District, Shanghai, 200437, China.
| | - Zheng Xu
- Xinzhuang Community Health Center, Shanghai, 201199, China
| | - Wei Yuan
- Department of Spinal Disease Unit, Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 200437, China
| | - Shixin Chang
- Department of Radiology, Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, 110 Ganhe Rd, Hongkou District, Shanghai, 200437, China
| | - Yongsheng Chen
- Department of Radiology, Wayne State University, Detroit, 48202, MI, USA
| | - Horea Calimente
- Department of Radiology, Wayne State University, Detroit, 48202, MI, USA
| | - Jiani Hu
- Department of Radiology, Wayne State University, Detroit, 48202, MI, USA
| |
Collapse
|
36
|
Shen J, Baum T, Cordes C, Ott B, Skurk T, Kooijman H, Rummeny EJ, Hauner H, Menze BH, Karampinos DC. Automatic segmentation of abdominal organs and adipose tissue compartments in water-fat MRI: Application to weight-loss in obesity. Eur J Radiol 2016; 85:1613-21. [PMID: 27501897 DOI: 10.1016/j.ejrad.2016.06.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 05/26/2016] [Accepted: 06/06/2016] [Indexed: 12/15/2022]
Abstract
PURPOSE To develop a fully automatic algorithm for abdominal organs and adipose tissue compartments segmentation and to assess organ and adipose tissue volume changes in longitudinal water-fat magnetic resonance imaging (MRI) data. MATERIALS AND METHODS Axial two-point Dixon images were acquired in 20 obese women (age range 24-65, BMI 34.9±3.8kg/m(2)) before and after a four-week calorie restriction. Abdominal organs, subcutaneous adipose tissue (SAT) compartments (abdominal, anterior, posterior), SAT regions along the feet-head direction and regional visceral adipose tissue (VAT) were assessed by a fully automatic algorithm using morphological operations and a multi-atlas-based segmentation method. RESULTS The accuracy of organ segmentation represented by Dice coefficients ranged from 0.672±0.155 for the pancreas to 0.943±0.023 for the liver. Abdominal SAT changes were significantly greater in the posterior than the anterior SAT compartment (-11.4%±5.1% versus -9.5%±6.3%, p<0.001). The loss of VAT that was not located around any organ (-16.1%±8.9%) was significantly greater than the loss of VAT 5cm around liver, left and right kidney, spleen, and pancreas (p<0.05). CONCLUSION The presented fully automatic algorithm showed good performance in abdominal adipose tissue and organ segmentation, and allowed the detection of SAT and VAT subcompartments changes during weight loss.
Collapse
Affiliation(s)
- Jun Shen
- Department of Computer Science, Technische Universität München, Munich, Germany; Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Thomas Baum
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Christian Cordes
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Beate Ott
- Else Kröner Fresenius Center for Nutritional Medicine, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Thomas Skurk
- Else Kröner Fresenius Center for Nutritional Medicine, Klinikum rechts der Isar, Technische Universität München, Munich, Germany; ZIEL Research Center for Nutrition and Food Sciences, Technische Universität München, Germany
| | | | - Ernst J Rummeny
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Hans Hauner
- Else Kröner Fresenius Center for Nutritional Medicine, Klinikum rechts der Isar, Technische Universität München, Munich, Germany; ZIEL Research Center for Nutrition and Food Sciences, Technische Universität München, Germany
| | - Bjoern H Menze
- Department of Computer Science, Technische Universität München, Munich, Germany
| | - Dimitrios C Karampinos
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany.
| |
Collapse
|
37
|
Brei C, Stecher L, Much D, Karla MT, Amann-Gassner U, Shen J, Ganter C, Karampinos DC, Brunner S, Hauner H. Reduction of the n-6:n-3 long-chain PUFA ratio during pregnancy and lactation on offspring body composition: follow-up results from a randomized controlled trial up to 5 y of age. Am J Clin Nutr 2016; 103:1472-81. [PMID: 27053380 DOI: 10.3945/ajcn.115.128520] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 03/10/2016] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND It has been hypothesized that the n-6:n-3 (ω-6:ω-3) long-chain polyunsaturated fatty acid (LCPUFA) ratio in the maternal diet during the prenatal and early postnatal phase positively affects the body composition of the offspring. However, only limited data from prospective human intervention studies with long-term follow-up are available. OBJECTIVE We assessed the long-term effects of a reduced n-6:n-3 LCPUFA ratio in the diets of pregnant and lactating women [1020 mg docosahexaenoic acid (DHA) plus 180 mg eicosapentaenoic acid (EPA)/d together with an arachidonic acid-balanced diet compared with a control diet] on the body weights and compositions of their offspring from 2 to 5 y of age with a focus on the 5-y results. DESIGN Participants in the randomized controlled trial received follow-up assessments with annual body-composition measurements including skinfold thickness (SFT) measurements (primary outcome), a sonographic assessment of abdominal subcutaneous and preperitoneal fat, and child growth. In addition, abdominal MRI was performed in a subgroup of 5-y-old children. For the statistical analysis, mixed models for repeated measures (MMRMs) were fit with the use of data from each visit since birth (except for MRI). RESULTS Maternal LCPUFA supplementation did not significantly influence the children's sum of 4 SFTs [means ± SDs at 5 y of age: intervention, 23.9 ± 4.7 mm (n = 57); control, 24.5 ± 5.0 mm (n = 55); adjusted mean difference, -0.5 (95% CI: -2.2, 1.2)], growth, or ultrasonography measures at any time point in the adjusted MMRM model (all P values < 0.05). Results were consistent with abdominal MRI measurements (n = 44) at 5 y of age, which showed no significant differences in subcutaneous and visceral adipose tissue volumes and ratios. CONCLUSION The current study provides no evidence that a dietary reduction of the n-6:n-3 LCPUFA ratio in the maternal diet during pregnancy and lactation is a useful early preventive strategy against obesity at preschool age. This trial was registered at clinicaltrials.gov as NCT00362089.
Collapse
Affiliation(s)
| | - Lynne Stecher
- Else Kröner-Fresenius-Center for Nutritional Medicine
| | - Daniela Much
- Forschergruppe Diabetes, and Institute of Diabetes Research, Helmholtz Zentrum München, Munich, Germany; and
| | | | | | - Jun Shen
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Carl Ganter
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Dimitrios C Karampinos
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | | | - Hans Hauner
- Else Kröner-Fresenius-Center for Nutritional Medicine, ZIEL-Institute for Food and Health, Nutritional Medicine Unit, Technische Universität München, Freising, Germany
| |
Collapse
|
38
|
Hernando D, Sharma SD, Aliyari Ghasabeh M, Alvis BD, Arora SS, Hamilton G, Pan L, Shaffer JM, Sofue K, Szeverenyi NM, Welch EB, Yuan Q, Bashir MR, Kamel IR, Rice MJ, Sirlin CB, Yokoo T, Reeder SB. Multisite, multivendor validation of the accuracy and reproducibility of proton-density fat-fraction quantification at 1.5T and 3T using a fat-water phantom. Magn Reson Med 2016; 77:1516-1524. [PMID: 27080068 DOI: 10.1002/mrm.26228] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 02/19/2016] [Accepted: 03/03/2016] [Indexed: 01/15/2023]
Abstract
PURPOSE To evaluate the accuracy and reproducibility of quantitative chemical shift-encoded (CSE) MRI to quantify proton-density fat-fraction (PDFF) in a fat-water phantom across sites, vendors, field strengths, and protocols. METHODS Six sites (Philips, Siemens, and GE Healthcare) participated in this study. A phantom containing multiple vials with various oil/water suspensions (PDFF:0%-100%) was built, shipped to each site, and scanned at 1.5T and 3T using two CSE protocols per field strength. Confounder-corrected PDFF maps were reconstructed using a common algorithm. To assess accuracy, PDFF bias and linear regression with the known PDFF were calculated. To assess reproducibility, measurements were compared across sites, vendors, field strengths, and protocols using analysis of covariance (ANCOVA), Bland-Altman analysis, and the intraclass correlation coefficient (ICC). RESULTS PDFF measurements revealed an overall absolute bias (across sites, field strengths, and protocols) of 0.22% (95% confidence interval, 0.07%-0.38%) and R2 > 0.995 relative to the known PDFF at each site, field strength, and protocol, with a slope between 0.96 and 1.02 and an intercept between -0.56% and 1.13%. ANCOVA did not reveal effects of field strength (P = 0.36) or protocol (P = 0.19). There was a significant effect of vendor (F = 25.13, P = 1.07 × 10-10 ) with a bias of -0.37% (Philips) and -1.22% (Siemens) relative to GE Healthcare. The overall ICC was 0.999. CONCLUSION CSE-based fat quantification is accurate and reproducible across sites, vendors, field strengths, and protocols. Magn Reson Med 77:1516-1524, 2017. © 2016 International Society for Magnetic Resonance in Medicine.
Collapse
Affiliation(s)
- Diego Hernando
- Department of Radiology, University of Wisconsin, Madison, Wisconsin, USA
| | - Samir D Sharma
- Department of Radiology, University of Wisconsin, Madison, Wisconsin, USA
| | | | - Bret D Alvis
- Department of Anesthesiology, Vanderbilt University, Nashville, Tennessee, USA
| | - Sandeep S Arora
- Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, Tennessee, USA
| | - Gavin Hamilton
- Department of Radiology, University of California, San Diego, California, USA
| | - Li Pan
- Siemens Healthcare, Baltimore, Maryland, USA
| | - Jean M Shaffer
- Department of Radiology, Duke University, Durham, North Carolina, USA
| | - Keitaro Sofue
- Department of Radiology, Duke University, Durham, North Carolina, USA.,Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Hyogo, Japan
| | | | - E Brian Welch
- Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, Tennessee, USA.,Institute of Imaging Science, Vanderbilt University, Nashville, Tennessee, USA
| | - Qing Yuan
- Department of Radiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Mustafa R Bashir
- Department of Radiology, Duke University, Durham, North Carolina, USA.,Center for Advanced Magnetic Resonance Development, Duke University, Durham, North Carolina, USA
| | - Ihab R Kamel
- Department of Radiology, The Johns Hopkins University, Baltimore, Maryland, USA
| | - Mark J Rice
- Department of Anesthesiology, Vanderbilt University, Nashville, Tennessee, USA
| | - Claude B Sirlin
- Department of Radiology, University of California, San Diego, California, USA
| | - Takeshi Yokoo
- Department of Radiology, University of Texas Southwestern Medical Center, Dallas, Texas, USA.,Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Scott B Reeder
- Department of Radiology, University of Wisconsin, Madison, Wisconsin, USA.,Department of Medical Physics, University of Wisconsin, Madison, Wisconsin, USA.,Department of Biomedical Engineering, University of Wisconsin, Madison, Wisconsin, USA.,Department of Medicine, University of Wisconsin, Madison, Wisconsin, USA.,Department of Emergency Medicine, University of Wisconsin, Madison, Wisconsin, USA
| |
Collapse
|
39
|
Baum T, Cordes C, Dieckmeyer M, Ruschke S, Franz D, Hauner H, Kirschke JS, Karampinos DC. MR-based assessment of body fat distribution and characteristics. Eur J Radiol 2016; 85:1512-8. [PMID: 26905521 DOI: 10.1016/j.ejrad.2016.02.013] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 02/03/2016] [Accepted: 02/09/2016] [Indexed: 12/14/2022]
Abstract
The assessment of body fat distribution and characteristics using magnetic resonance (MR) methods has recently gained significant attention as it further extends our pathophysiological understanding of diseases including obesity, metabolic syndrome, or type 2 diabetes mellitus, and allows more detailed insights into treatment response and effects of lifestyle interventions. Therefore, the purpose of this study was to review the current literature on MR-based assessment of body fat distribution and characteristics. PubMed search was performed to identify relevant studies on the assessment of body fat distribution and characteristics using MR methods. T1-, T2-weighted MR Imaging (MRI), Magnetic Resonance Spectroscopy (MRS), and chemical shift-encoding based water-fat MRI have been successfully used for the assessment of body fat distribution and characteristics. The relationship of insulin resistance and serum lipids with abdominal adipose tissue (i.e. subcutaneous and visceral adipose tissue), liver, muscle, and bone marrow fat content have been extensively investigated and may help to understand the underlying pathophysiological mechanisms and the multifaceted obese phenotype. MR methods have also been used to monitor changes of body fat distribution and characteristics after interventions (e.g. diet or physical activity) and revealed distinct, adipose tissue-specific properties. Lastly, chemical shift-encoding based water-fat MRI can detect brown adipose tissue which is currently the focus of intense research as a potential treatment target for obesity. In conclusion, MR methods reliably allow the assessment of body fat distribution and characteristics. Irrespective of the promising findings based on these MR methods the clinical usefulness remains to be established.
Collapse
Affiliation(s)
- Thomas Baum
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany.
| | - Christian Cordes
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Michael Dieckmeyer
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Stefan Ruschke
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Daniela Franz
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Hans Hauner
- Else Kröner Fresenius Center for Nutritional Medicine, Klinikum rechts der Isar, Technische Universität München, Munich, Germany; ZIEL Research Center for Nutrition and Food Sciences, Technische Universität München, Germany
| | - Jan S Kirschke
- Section of Diagnostic and Interventional Neuroradiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Dimitrios C Karampinos
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| |
Collapse
|
40
|
Yang Y, Luo X, Xie X, Yan F, Chen G, Zhao W, Jiang Z, Fang C, Shen J. Influences of teriparatide administration on marrow fat content in postmenopausal osteopenic women using MR spectroscopy. Climacteric 2016; 19:285-91. [PMID: 26744910 DOI: 10.3109/13697137.2015.1126576] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Objective Teriparatide could induce osteoblast differentiation of mesenchymal stem cells while inhibiting adipocyte differentiation. However, there are significant differences between ex vivo and in vivo models. We aimed to evaluate the impact of teriparatide on marrow and abdominal fat accumulation in postmenopausal osteopenic women. Methods Postmenopausal osteopenic women were randomly assigned to receive teriparatide or placebo for 12 months. Subcutaneous (SAT) and visceral adipose tissue (VAT), marrow fat fraction (MFF), bone density (BMD) and bone biomarkers were measured at baseline, 6 and 12 months. Results At 12 months, mean percentage changes in BMD from baseline were 3.51%, 2.21% and 1.80% at lumbar spine, total hip and femoral neck for the teriparatide group, respectively. Relative to baseline conditions, teriparatide reduced MFF (-3.54% at 6 months; -5.87% at 12 months, all p < 0.01). A significant difference in MFF, but not BMD, was first detected at 6 months (p = 0.012) between groups. MFF was negatively associated with SAT (r = -0.479) and positively associated with VAT (r = 0.531) and VAT/SAT (r = 0.415, all p < 0.05). Teriparatide treatment did not alter abdominal fat composition. Conclusion Teriparatide effectively lowers marrow adiposity but not abdominal fat accumulation in postmenopausal osteopenic women.
Collapse
Affiliation(s)
- Y Yang
- a Department of Radiology , Ruijin Hospital, Shanghai Jiao Tong University School of Medicine , Shanghai , China ;,b Department of Radiology , The Second Affiliated Hospital of Soochow University , Suzhou , China
| | - X Luo
- a Department of Radiology , Ruijin Hospital, Shanghai Jiao Tong University School of Medicine , Shanghai , China ;,c Department of Radiology , Northern Jiangsu People's Hospital and Clinical Medical College of Yangzhou University , Yangzhou , China
| | - X Xie
- d Department of Radiology , First People's Hospital Affiliated to Shanghai Jiaotong University , Shanghai , China
| | - F Yan
- a Department of Radiology , Ruijin Hospital, Shanghai Jiao Tong University School of Medicine , Shanghai , China
| | - G Chen
- b Department of Radiology , The Second Affiliated Hospital of Soochow University , Suzhou , China
| | - W Zhao
- b Department of Radiology , The Second Affiliated Hospital of Soochow University , Suzhou , China
| | - Z Jiang
- b Department of Radiology , The Second Affiliated Hospital of Soochow University , Suzhou , China
| | - C Fang
- e Department of Endocrinology , The Second Affiliated Hospital of Soochow University , Suzhou , China
| | - J Shen
- b Department of Radiology , The Second Affiliated Hospital of Soochow University , Suzhou , China
| |
Collapse
|
41
|
Hardouin P, Rharass T, Lucas S. Bone Marrow Adipose Tissue: To Be or Not To Be a Typical Adipose Tissue? Front Endocrinol (Lausanne) 2016; 7:85. [PMID: 27445987 PMCID: PMC4928601 DOI: 10.3389/fendo.2016.00085] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 06/21/2016] [Indexed: 12/12/2022] Open
Abstract
Bone marrow adipose tissue (BMAT) emerges as a distinct fat depot whose importance has been proved in the bone-fat interaction. Indeed, it is well recognized that adipokines and free fatty acids released by adipocytes can directly or indirectly interfere with cells of bone remodeling or hematopoiesis. In pathological states, such as osteoporosis, each of adipose tissues - subcutaneous white adipose tissue (WAT), visceral WAT, brown adipose tissue (BAT), and BMAT - is differently associated with bone mineral density (BMD) variations. However, compared with the other fat depots, BMAT displays striking features that makes it a substantial actor in bone alterations. BMAT quantity is well associated with BMD loss in aging, menopause, and other metabolic conditions, such as anorexia nervosa. Consequently, BMAT is sensed as a relevant marker of a compromised bone integrity. However, analyses of BMAT development in metabolic diseases (obesity and diabetes) are scarce and should be, thus, more systematically addressed to better apprehend the bone modifications in that pathophysiological contexts. Moreover, bone marrow (BM) adipogenesis occurs throughout the whole life at different rates. Following an ordered spatiotemporal expansion, BMAT has turned to be a heterogeneous fat depot whose adipocytes diverge in their phenotype and their response to stimuli according to their location in bone and BM. In vitro, in vivo, and clinical studies point to a detrimental role of BM adipocytes (BMAs) throughout the release of paracrine factors that modulate osteoblast and/or osteoclast formation and function. However, the anatomical dissemination and the difficulties to access BMAs still hamper our understanding of the relative contribution of BMAT secretions compared with those of peripheral adipose tissues. A further characterization of the phenotype and the functional regulation of BMAs are ever more required. Based on currently available data and comparison with other fat tissues, this review addresses the originality of the BMAT with regard to its development, anatomy, metabolic properties, and response to physiological cues.
Collapse
Affiliation(s)
- Pierre Hardouin
- Laboratory of Pathophysiology of Inflammatory Bone Diseases PMOI, University of Littoral-Opale Coast ULCO, Boulogne sur Mer, France
| | - Tareck Rharass
- Laboratory of Pathophysiology of Inflammatory Bone Diseases PMOI, University of Littoral-Opale Coast ULCO, Boulogne sur Mer, France
| | - Stéphanie Lucas
- Laboratory of Pathophysiology of Inflammatory Bone Diseases PMOI, University of Littoral-Opale Coast ULCO, Boulogne sur Mer, France
- *Correspondence: Stéphanie Lucas,
| |
Collapse
|
42
|
Cordes C, Baum T, Dieckmeyer M, Ruschke S, Diefenbach MN, Hauner H, Kirschke JS, Karampinos DC. MR-Based Assessment of Bone Marrow Fat in Osteoporosis, Diabetes, and Obesity. Front Endocrinol (Lausanne) 2016; 7:74. [PMID: 27445977 PMCID: PMC4921741 DOI: 10.3389/fendo.2016.00074] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 06/14/2016] [Indexed: 12/11/2022] Open
Abstract
Bone consists of the mineralized component (i.e., cortex and trabeculae) and the non-mineralized component (i.e., bone marrow). Most of the routine clinical bone imaging uses X-ray-based techniques and focuses on the mineralized component. However, bone marrow adiposity has been also shown to have a strong linkage with bone health. Specifically, multiple previous studies have demonstrated a negative association between bone marrow fat fraction (BMFF) and bone mineral density. Magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS) are ideal imaging techniques for non-invasively investigating the properties of bone marrow fat. In the present work, we first review the most important MRI and MRS methods for assessing properties of bone marrow fat, including methodologies for measuring BMFF and bone marrow fatty acid composition parameters. Previous MRI and MRS studies measuring BMFF and fat unsaturation in the context of osteoporosis are then reviewed. Finally, previous studies investigating the relationship between bone marrow fat, other fat depots, and bone health in patients with obesity and type 2 diabetes are presented. In summary, MRI and MRS are powerful non-invasive techniques for measuring properties of bone marrow fat in osteoporosis, obesity, and type 2 diabetes and can assist in future studies investigating the pathophysiology of bone changes in the above clinical scenarios.
Collapse
Affiliation(s)
- Christian Cordes
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
- *Correspondence: Christian Cordes,
| | - Thomas Baum
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Michael Dieckmeyer
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Stefan Ruschke
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Maximilian N. Diefenbach
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Hans Hauner
- Else Kröner Fresenius Center for Nutritional Medicine, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Jan S. Kirschke
- Section of Diagnostic and Interventional Neuroradiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - Dimitrios C. Karampinos
- Department of Diagnostic and Interventional Radiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| |
Collapse
|
43
|
Karampinos DC, Ruschke S, Dieckmeyer M, Eggers H, Kooijman H, Rummeny EJ, Bauer JS, Baum T. Modeling of T2* decay in vertebral bone marrow fat quantification. NMR IN BIOMEDICINE 2015; 28:1535-1542. [PMID: 26423583 DOI: 10.1002/nbm.3420] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 07/29/2015] [Accepted: 08/31/2015] [Indexed: 06/05/2023]
Abstract
Bone marrow fat fraction mapping using chemical shift encoding-based water-fat separation is becoming a useful tool in investigating the association between bone marrow adiposity and bone health and in assessing cancer treatment-induced bone marrow damage. Vertebral bone marrow is characterized by short T2* relaxation times, which are in general different for the water and fat components and can confound fat quantification. The purpose of the present study is to compare different approaches to T2* correction in chemical shift encoding-based water-fat imaging of vertebral bone marrow using single-voxel MRS as reference. Eight-echo gradient-echo imaging and single-voxel MRS measurements were made on the spine (L3-L5) of 25 healthy volunteers. Different approaches were evaluated for correction of T2* effects: (a) single-T2* correction, (b) dual-T2* correction, (c) T2' correction using the a priori-known T2 from the MRS at each vertebral body and (d) T2' correction using the a priori-known T2 equal to previously measured average values. Dual-T2* correction resulted in noisier imaging fat fraction maps than single-T2* correction or T2' correction using a priori-known T2. Linear regression analysis between imaging and MRS fat fraction showed a slope significantly different from 1 when using single-T2* correction (R(2) = 0.96) or dual-T2* correction (R(2) = 0.87). T2' correction using the a priori-known T2 resulted in a slope not significantly different from 1, an intercept significantly different from 0 (between 2.4% and 3%) and R(2) = 0.96. Therefore, a T2' correction using a priori-known T2 can remove the fat fraction bias induced by the difference in T2* between water and fat components without degrading noise performance in fat fraction mapping of vertebral bone marrow.
Collapse
Affiliation(s)
- Dimitrios C Karampinos
- Department of Diagnostic and Interventional Radiology, Technische Universität München, Munich, Germany
| | - Stefan Ruschke
- Department of Diagnostic and Interventional Radiology, Technische Universität München, Munich, Germany
| | - Michael Dieckmeyer
- Department of Diagnostic and Interventional Radiology, Technische Universität München, Munich, Germany
| | | | | | - Ernst J Rummeny
- Department of Diagnostic and Interventional Radiology, Technische Universität München, Munich, Germany
| | - Jan S Bauer
- Section of Neuroradiology, Technische Universität München, Munich, Germany
| | - Thomas Baum
- Department of Diagnostic and Interventional Radiology, Technische Universität München, Munich, Germany
| |
Collapse
|
44
|
Hu HH, Chen J, Shen W. Segmentation and quantification of adipose tissue by magnetic resonance imaging. MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE 2015; 29:259-76. [PMID: 26336839 DOI: 10.1007/s10334-015-0498-z] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 08/11/2015] [Accepted: 08/12/2015] [Indexed: 12/13/2022]
Abstract
In this brief review, introductory concepts in animal and human adipose tissue segmentation using proton magnetic resonance imaging (MRI) and computed tomography are summarized in the context of obesity research. Adipose tissue segmentation and quantification using spin relaxation-based (e.g., T1-weighted, T2-weighted), relaxometry-based (e.g., T1-, T2-, T2*-mapping), chemical-shift selective, and chemical-shift encoded water-fat MRI pulse sequences are briefly discussed. The continuing interest to classify subcutaneous and visceral adipose tissue depots into smaller sub-depot compartments is mentioned. The use of a single slice, a stack of slices across a limited anatomical region, or a whole body protocol is considered. Common image post-processing steps and emerging atlas-based automated segmentation techniques are noted. Finally, the article identifies some directions of future research, including a discussion on the growing topic of brown adipose tissue and related segmentation considerations.
Collapse
Affiliation(s)
- Houchun Harry Hu
- Department of Radiology, Phoenix Children's Hospital, 1919 East Thomas Road, Phoenix, AZ, 85016, USA.
| | - Jun Chen
- Obesity Research Center, Department of Medicine, Columbia University Medical Center, 1150 Saint Nicholas Avenue, New York, NY, 10032, USA
| | - Wei Shen
- Obesity Research Center, Department of Medicine and Institute of Human Nutrition, Columbia University Medical Center, 1150 Saint Nicholas Avenue, New York, NY, 10032, USA
| |
Collapse
|