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Kassey VB, Walle M, Egan J, Yeritsyan D, Beeram I, Wu Y, Snyder BD, Rodriguez EK, Ackerman JL, Nazarian A. Quantitative 31P magnetic resonance imaging on pathologic rat bones by ZTE at 7T. Bone 2024; 180:116996. [PMID: 38154764 PMCID: PMC10843610 DOI: 10.1016/j.bone.2023.116996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 12/19/2023] [Accepted: 12/20/2023] [Indexed: 12/30/2023]
Abstract
BACKGROUND Osteoporosis is characterized by low bone mineral density (BMD), which predisposes individuals to frequent fragility fractures. Quantitative BMD measurements can potentially help distinguish bone pathologies and allow clinicians to provide disease-relieving therapies. Our group has developed non-invasive and non-ionizing magnetic resonance imaging (MRI) techniques to measure bone mineral density quantitatively. Dual-energy X-ray Absorptiometry (DXA) is a clinically approved non-invasive modality to diagnose osteoporosis but has associated disadvantages and limitations. PURPOSE Evaluate the clinical feasibility of phosphorus (31P) MRI as a non-invasive and non-ionizing medical diagnostic tool to compute bone mineral density to help differentiate between different metabolic bone diseases. MATERIALS AND METHODS Fifteen ex-vivo rat bones in three groups [control, ovariectomized (osteoporosis), and vitamin-D deficient (osteomalacia - hypo-mineralized) were scanned to compute BMD. A double-tuned (1H/31P) transmit-receive single RF coil was custom-designed and in-house-built with a better filling factor and strong radiofrequency (B1) field to acquire solid-state 31P MR images from rat femurs with an optimum signal-to-noise ratio (SNR). Micro-computed tomography (μCT) and gold-standard gravimetric analyses were performed to compare and validate MRI-derived bone mineral densities. RESULTS Three-dimensional 31P MR images of rat bones were obtained with a zero-echo-time (ZTE) sequence with 468 μm spatial resolution and 12-17 SNR on a Bruker 7 T Biospec having multinuclear capability. BMD was measured quantitatively on cortical and trabecular bones with a known standard reference. A strong positive correlation (R = 0.99) and a slope close to 1 in phantom measurements indicate that the densities measured by 31P ZTE MRI are close to the physical densities in computing quantitative BMD. The 31P NMR properties (resonance linewidth of 4 kHz and T1 of 67 s) of ex-vivo rat bones were measured, and 31P ZTE imaging parameters were optimized. The BMD results obtained from MRI are in good agreement with μCT and gravimetry results. CONCLUSION Quantitative measurements of BMD on ex-vivo rat femurs were successfully conducted on a 7 T preclinical scanner. This study suggests that quantitative measurements of BMD are feasible on humans in clinical MRI with suitable hardware, RF coils, and pulse sequences with optimized parameters within an acceptable scan time since human femurs are approximately ten times larger than rat femurs. As MRI provides quantitative in-vivo data, various systemic musculoskeletal conditions can be diagnosed potentially in humans.
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Affiliation(s)
- Victor B Kassey
- Musculoskeletal Translational Innovation Initiative, Carl J. Shapiro Department of Orthopaedic Surgery, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA; Department of Orthopaedic Surgery, Children's Hospital, Boston, MA 02115, USA; Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA 02129, USA; Harvard Medical School, Boston, MA 02115, USA
| | - Matthias Walle
- Musculoskeletal Translational Innovation Initiative, Carl J. Shapiro Department of Orthopaedic Surgery, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
| | - Jonathan Egan
- Musculoskeletal Translational Innovation Initiative, Carl J. Shapiro Department of Orthopaedic Surgery, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
| | - Diana Yeritsyan
- Musculoskeletal Translational Innovation Initiative, Carl J. Shapiro Department of Orthopaedic Surgery, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
| | - Indeevar Beeram
- Musculoskeletal Translational Innovation Initiative, Carl J. Shapiro Department of Orthopaedic Surgery, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA
| | - Yaotang Wu
- Department of Orthopaedic Surgery, Children's Hospital, Boston, MA 02115, USA; Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA 02129, USA; Harvard Medical School, Boston, MA 02115, USA
| | - Brian D Snyder
- Musculoskeletal Translational Innovation Initiative, Carl J. Shapiro Department of Orthopaedic Surgery, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA; Department of Orthopaedic Surgery, Children's Hospital, Boston, MA 02115, USA; Harvard Medical School, Boston, MA 02115, USA
| | - Edward K Rodriguez
- Musculoskeletal Translational Innovation Initiative, Carl J. Shapiro Department of Orthopaedic Surgery, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA; Harvard Medical School, Boston, MA 02115, USA
| | - Jerome L Ackerman
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA 02129, USA; Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA 02139, USA; Harvard Medical School, Boston, MA 02115, USA
| | - Ara Nazarian
- Musculoskeletal Translational Innovation Initiative, Carl J. Shapiro Department of Orthopaedic Surgery, Beth Israel Deaconess Medical Center, Boston, MA 02215, USA; Department of Orthopaedic Surgery, Yerevan State Medical University, Yerevan, Armenia; Harvard Medical School, Boston, MA 02115, USA.
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Ha P, Kwak JH, Zhang Y, Shi J, Tran L, Liu TP, Pan HC, Lee S, Kim JK, Chen E, Shirazi-Fard Y, Stodieck LS, Lin A, Zheng Z, Dong SN, Zhang X, Wu BM, Ting K, Soo C. Bisphosphonate conjugation enhances the bone-specificity of NELL-1-based systemic therapy for spaceflight-induced bone loss in mice. NPJ Microgravity 2023; 9:75. [PMID: 37723136 PMCID: PMC10507033 DOI: 10.1038/s41526-023-00319-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 08/18/2023] [Indexed: 09/20/2023] Open
Abstract
Microgravity-induced bone loss results in a 1% bone mineral density loss monthly and can be a mission critical factor in long-duration spaceflight. Biomolecular therapies with dual osteogenic and anti-resorptive functions are promising for treating extreme osteoporosis. We previously confirmed that NELL-like molecule-1 (NELL-1) is crucial for bone density maintenance. We further PEGylated NELL-1 (NELL-polyethylene glycol, or NELL-PEG) to increase systemic delivery half-life from 5.5 to 15.5 h. In this study, we used a bio-inert bisphosphonate (BP) moiety to chemically engineer NELL-PEG into BP-NELL-PEG and specifically target bone tissues. We found conjugation with BP improved hydroxyapatite (HA) binding and protein stability of NELL-PEG while preserving NELL-1's osteogenicity in vitro. Furthermore, BP-NELL-PEG showed superior in vivo bone specificity without observable pathology in liver, spleen, lungs, brain, heart, muscles, or ovaries of mice. Finally, we tested BP-NELL-PEG through spaceflight exposure onboard the International Space Station (ISS) at maximal animal capacity (n = 40) in a long-term (9 week) osteoporosis therapeutic study and found that BP-NELL-PEG significantly increased bone formation in flight and ground control mice without obvious adverse health effects. Our results highlight BP-NELL-PEG as a promising therapeutic to mitigate extreme bone loss from long-duration microgravity exposure and musculoskeletal degeneration on Earth, especially when resistance training is not possible due to incapacity (e.g., bone fracture, stroke).
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Affiliation(s)
- Pin Ha
- Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Orthopaedic Surgery and the Orthopaedic Hospital Research Center, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Jin Hee Kwak
- Herman Ostrow School of Dentistry, University of Southern California, Los Angeles, CA, 90089, USA
| | - Yulong Zhang
- Department of Bioengineering, Henry Samueli School of Engineering and Applied Science, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Forsyth Institute, Cambridge, MA, 02142, USA
| | - Jiayu Shi
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Luan Tran
- Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Orthopaedic Surgery and the Orthopaedic Hospital Research Center, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Timothy Pan Liu
- Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Orthopaedic Surgery and the Orthopaedic Hospital Research Center, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Hsin-Chuan Pan
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Samantha Lee
- Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Orthopaedic Surgery and the Orthopaedic Hospital Research Center, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Jong Kil Kim
- Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Eric Chen
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Yasaman Shirazi-Fard
- Space Biosciences Division, NASA Ames Research Center, Moffett Field, CA, 94035, USA
| | - Louis S Stodieck
- BioServe Space Technologies and Aerospace Engineering Sciences, University of Colorado, Boulder, CO, 80303, USA
| | - Andy Lin
- Office of Advanced Research Computing, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Zhong Zheng
- Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
- Department of Orthopaedic Surgery and the Orthopaedic Hospital Research Center, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Stella Nuo Dong
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Xinli Zhang
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA
| | - Benjamin M Wu
- Department of Orthopaedic Surgery and the Orthopaedic Hospital Research Center, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
- Department of Bioengineering, Henry Samueli School of Engineering and Applied Science, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
- Forsyth Institute, Cambridge, MA, 02142, USA.
- School of Dentistry, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
| | - Kang Ting
- Forsyth Institute, Cambridge, MA, 02142, USA.
| | - Chia Soo
- Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
- Department of Orthopaedic Surgery and the Orthopaedic Hospital Research Center, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
- Department of Bioengineering, Henry Samueli School of Engineering and Applied Science, University of California, Los Angeles, Los Angeles, CA, 90095, USA.
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Paliologo T, Shimano RC, Shimano AC, Macedo AP, Falcai MJ, Issa JPM. Effects of swimming associated with risedronate in osteopenic bones: An experimental study with ovariectomized rats. Micron 2015. [PMID: 26210684 DOI: 10.1016/j.micron.2015.07.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Physical activity and risedronate sodium have effects on metabolic bone diseases, maintaining the integrity of bone tissue. Our objective was to evaluate the effects of swimming associated with risedronate as a prophylactic means in osteopenic bone of ovariectomized rats. A total of 24 animals of the Wistar strain were used and separated into four groups containing six animals: Ovariectomy (OVX), ovariectomy and swimming (OVXS), ovariectomy and risedronate (OVXM), ovariectomy, risedronate and swimming (OVXMS). The effectiveness of the treatments were evaluated using the tibia by means of biomechanical, radiographic, histomorphometric analyzes. Statistical analysis was performed by the non-parametric Kruskal-Wallis test (p<0.05). The OVXM and OVXMS groups showed higher values compared to OVX in maximum strength and rigidity. Microscopic analysis showed increased trabecular bone in the OVXM group in relation to the others, and in the OVXMS compared to OVXS. Proximal densitometry in the OVXM and OVXMS groups showed higher values than the OVX and OVXS groups. There were no significant differences in overall densitometry. In conclusion, when comparing the prophylactic means, risedronate was able to preserve bone mass significantly, unlike exercise where an improvement of bone tissue was observed, although not significant, and when swimming and risedronate are combined the result was even better.
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Affiliation(s)
- Taiane Paliologo
- Department of Biomechanics, Medicine and Rehabilitation of the Locomotor System, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Brazil.
| | - Roberta Carminati Shimano
- Department of Biomechanics, Medicine and Rehabilitation of the Locomotor System, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Brazil.
| | - Antônio Carlos Shimano
- Department of Biomechanics, Medicine and Rehabilitation of the Locomotor System, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Brazil.
| | - Ana Paula Macedo
- Department of Biomechanics, Medicine and Rehabilitation of the Locomotor System, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Brazil.
| | - Maurício José Falcai
- Department of Biomechanics, Medicine and Rehabilitation of the Locomotor System, Faculty of Medicine of Ribeirão Preto, University of São Paulo, Brazil.
| | - João Paulo Mardegan Issa
- Department of Morphology, Physiology and Basic Pathology, School of Dentistry of Ribeirão Preto, University of São Paulo, Brazil.
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