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Zhu H, Lang ML, Yang Y, Martin M, Zhang G, Zhang Q, Chen Y, Yan X. Detunable wireless Litzcage coil for human head MRI at 1.5 T. NMR Biomed 2024; 37:e5068. [PMID: 37964107 DOI: 10.1002/nbm.5068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/09/2023] [Accepted: 10/11/2023] [Indexed: 11/16/2023]
Abstract
Inductively coupled radiofrequency (RF) coils are an inexpensive and simple method to realize wireless RF coils in magnetic resonance imaging (MRI), which can significantly ease the MRI scan setup and improve patient comfort because they do not require bulky components such as cables, baluns, preamplifiers, and connectors. However, volume-type wireless coils are typically operated in transmit/receive mode because detuning such coils is much more challenging due to their complex structure and multiple resonant modes. Meanwhile, adding too many detuning circuits to a wireless coil would decrease the coil's quality factor, impair the signal-to-noise ratio, and increase the cost. In this work, we proposed, constructed, and tested a novel wireless volume coil based on the Litzcage design for 1.5-T head imaging. Being an inductively coupled coil, it has a much simpler structure, resulting in a lighter weight and less bulky design. Despite its simpler structure, it exhibits comparable imaging performance with a commercial receive array, providing an alternative to conventional wired coils with a high cost and complex structure. The unique figure-of-8 conductor pattern within the rungs ensures that the proposed wireless Litzcage can be efficiently detuned with minimal detuning circuits.
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Affiliation(s)
- Haoqin Zhu
- Sino Canada Health Institute Inc., Winnipeg, Manitoba, Canada
| | - Michael L Lang
- Sino Canada Health Institute Inc., Winnipeg, Manitoba, Canada
- Department of Physics, The University of Winnipeg, Winnipeg, Manitoba, Canada
| | - Yijin Yang
- Department of Electrical and Computer Engineering, Vanderbilt University, Nashville, Tennessee, USA
| | - Melanie Martin
- Department of Physics, The University of Winnipeg, Winnipeg, Manitoba, Canada
| | - Gong Zhang
- Hubei Key Laboratory of Intelligent Conveying Technology and Device, Hubei Polytechnic University, Huangshi, China
| | - Qiang Zhang
- The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, China
| | - Yuanyuan Chen
- Sino Canada Health Engineering Research Institute (Hefei) Ltd., Hefei, Anhui, China
| | - Xinqiang Yan
- Department of Electrical and Computer Engineering, Vanderbilt University, Nashville, Tennessee, USA
- Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, Tennessee, USA
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Zhu D, Hadjivassiliou H, Jennings C, Mikolon D, Ammirante M, Acharya S, Lloyd J, Abbasian M, Narla RK, Piccotti JR, Stamp K, Cho H, Hariharan K. CC-96673 (BMS-986358), an affinity-tuned anti-CD47 and CD20 bispecific antibody with fully functional fc, selectively targets and depletes non-Hodgkin's lymphoma. MAbs 2024; 16:2310248. [PMID: 38349008 PMCID: PMC10865928 DOI: 10.1080/19420862.2024.2310248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 01/22/2024] [Indexed: 02/15/2024] Open
Abstract
Cluster of differentiation 47 (CD47) is a transmembrane protein highly expressed in tumor cells that interacts with signal regulatory protein alpha (SIRPα) and triggers a "don't eat me" signal to the macrophage, inhibiting phagocytosis and enabling tumor escape from immunosurveillance. The CD47-SIRPα axis has become an important target for cancer immunotherapy. To date, the advancement of CD47-targeted modalities is hindered by the ubiquitous expression of the target, often leading to rapid drug elimination and hematologic toxicity including anemia. To overcome those challenges a bispecific approach was taken. CC-96673, a humanized IgG1 bispecific antibody co-targeting CD47 and CD20, is designed to bind CD20 with high affinity and CD47 with optimally lowered affinity. As a result of the detuned CD47 affinity, CC-96673 selectively binds to CD20-expressing cells, blocking the interaction of CD47 with SIRPα. This increased selectivity of CC-96673 over monospecific anti-CD47 approaches allows for the use of wild-type IgG1 Fc, which engages activating crystallizable fragment gamma receptors (FcγRs) to fully potentiate macrophages to engulf and destroy CD20+ cells, while sparing CD47+CD20- normal cells. The combined targeting of anti-CD20 and anti-CD47 results in enhanced anti- tumor activity compared to anti-CD20 targeting antibodies alone. Furthermore, preclinical studies have demonstrated that CC-96673 exhibits acceptable pharmacokinetic properties with a favorable toxicity profile in non-human primates. Collectively, these findings define CC-96673 as a promising CD47 × CD20 bispecific antibody that selectively destroys CD20+ cancer cells via enhanced phagocytosis and other effector functions.
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Affiliation(s)
- Dan Zhu
- Department of Discovery Biotherapeutics, Bristol Myers Squibb, San Diego, CA, USA
| | | | - Catherine Jennings
- Department of Discovery Biotherapeutics, Bristol Myers Squibb, San Diego, CA, USA
| | - David Mikolon
- Department of Discovery Biotherapeutics, Bristol Myers Squibb, San Diego, CA, USA
| | - Massimo Ammirante
- Oncogenesis Thematic Research Center, Bristol Myers Squibb, San Diego, CA, USA
| | - Sharmistha Acharya
- Department of Discovery Biotherapeutics, Bristol Myers Squibb, San Diego, CA, USA
| | - Jon Lloyd
- Department of Discovery Biotherapeutics, Bristol Myers Squibb, San Diego, CA, USA
| | - Mahan Abbasian
- Department of Discovery Biotherapeutics, Bristol Myers Squibb, San Diego, CA, USA
| | - Rama Krishna Narla
- Oncogenesis Thematic Research Center, Bristol Myers Squibb, San Diego, CA, USA
| | - Joseph R. Piccotti
- Department of Nonclinical Development, Bristol Myers Squibb, San Diego, CA, USA
| | - Katie Stamp
- Department of Nonclinical Development, Bristol Myers Squibb, San Diego, CA, USA
| | - Ho Cho
- Department of Discovery Biotherapeutics, Bristol Myers Squibb, San Diego, CA, USA
| | - Kandasamy Hariharan
- Department of Discovery Biotherapeutics, Bristol Myers Squibb, San Diego, CA, USA
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