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Sawaya R, Kuribayashi S, Ueda J, Saito S. Evaluating the Cisplatin Dose Dependence of Testicular Dysfunction using Creatine Chemical Exchange Saturation Transfer Imaging. Diagnostics (Basel) 2022; 12:diagnostics12051046. [PMID: 35626202 PMCID: PMC9139560 DOI: 10.3390/diagnostics12051046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 04/18/2022] [Accepted: 04/19/2022] [Indexed: 11/16/2022] Open
Abstract
Chemical exchange saturation transfer (CEST) imaging is a non-invasive molecular imaging technique for indirectly measuring low-concentration endogenous metabolites. Conventional CEST has low specificity, owing to the effects of spillover, magnetization transfer (MT), and T1 relaxation, thus necessitating an inverse Z-spectrum analysis. We aimed to investigate the usefulness of inverse Z-spectrum analysis in creatine (Cr)-CEST in mice, by conducting preclinical 7T-magnetic resonance imaging (MRI) and comparing the conventional analysis metric magnetization transfer ratio (MTRconv) with the novel metric apparent exchange-dependent relaxation (AREX). We performed Cr-CEST imaging using 7T-MRI on mouse testes, using C57BL/6 mice as the control and a cisplatin-treated model. We prepared different doses of cisplatin to observe its dose dependence effect on testicular function. CEST imaging was obtained using an MT pulse with varying saturation frequencies, ranging from −4.8 ppm to +4.8 ppm. The application of control mouse testes improved the specificity of the CEST effect and image contrast between the testes and testicular epithelium. The cisplatin-treated model revealed impaired testicular function, and the Cr-CEST imaging displayed decreased Cr levels in the testes. There was a significant difference between the low- and high-dose models. The MTR values of Cr-CEST reflected the cisplatin dose dependence of testicular dysfunction.
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Affiliation(s)
- Reika Sawaya
- Department of Medical Physics and Engineering, Area of Medical Imaging Technology and Science, Division of Health Sciences, Osaka University Graduate School of Medicine, Suita 565-0871, Osaka, Japan; (R.S.); (J.U.)
- Department of Medical Technology, Osaka University Hospital, Suita 565-0871, Osaka, Japan
| | - Sohei Kuribayashi
- Department of Urology, Osaka University Graduate School of Medicine, Suita 565-0871, Osaka, Japan;
| | - Junpei Ueda
- Department of Medical Physics and Engineering, Area of Medical Imaging Technology and Science, Division of Health Sciences, Osaka University Graduate School of Medicine, Suita 565-0871, Osaka, Japan; (R.S.); (J.U.)
| | - Shigeyoshi Saito
- Department of Medical Physics and Engineering, Area of Medical Imaging Technology and Science, Division of Health Sciences, Osaka University Graduate School of Medicine, Suita 565-0871, Osaka, Japan; (R.S.); (J.U.)
- Department of Advanced Medical Technologies, National Cerebral and Cardiovascular Center Research Institute, Suita 564-8565, Osaka, Japan
- Correspondence: ; Tel.: +81-6-6879-2619
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Autissier R, Mazuel L, Maubert E, Bonny JM, Auzeloux P, Schmitt S, Traoré A, Peyrode C, Miot-Noirault E, Pagés G. Simultaneous proteoglycans and hypoxia mapping of chondrosarcoma environment by frequency selective CEST MRI. Magn Reson Med 2021; 86:1008-1018. [PMID: 33772858 DOI: 10.1002/mrm.28781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 03/01/2021] [Accepted: 03/04/2021] [Indexed: 11/10/2022]
Abstract
PURPOSE To evaluate the relevance of CEST frequency selectivity in simultaneous in vivo imaging of both of chondrosarcoma's phenotypic features, that are, its high proteoglycan concentration and its hypoxic core. METHODS Swarm rat chondrosarcomas were implanted subcutaneously in NMRI nude mice. When tumors were measurable (12-16 days postoperative), mice were submitted to GAG, guanidyl, and APT CEST imaging. Proteoglycans and hypoxia were assessed in parallel by nuclear imaging exploiting 99m Tc-NTP 15-5 and 18 F-FMISO, respectively. Data were completed by ex vivo analysis of proteoglycans (histology and biochemical assay) and hypoxia (immunofluorescence). RESULTS Quantitative analysis of GAG CEST evidenced a significantly higher signal for tumor tissues than for muscles. These results were in agreement with nuclear imaging and ex vivo data. For imaging tumoral pH in vivo, the CEST ratio of APT/guanidyl was studied. This highlighted an important heterogeneity inside the tumor. The hypoxic status was confirmed by 18 F-FMISO PET imaging and ex vivo immunofluorescence. CONCLUSION CEST MRI simultaneously imaged both chondrosarcoma properties during a single experimental run and without the injection of any contrast agent. Both MR and nuclear imaging as well as ex vivo data were in agreement and showed that this chondrosarcoma animal model was rich in proteoglycans. However, even if tumors were lightly hypoxic at the stage studied, acidic areas were highlighted and mapped inside the tumor.
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Affiliation(s)
- Roxane Autissier
- INRAE, UR QuaPA, Saint-Genès-Champanelle, France.,Université Clermont Auvergne, INSERM, U1240 Imagerie Moléculaire et Stratégies Théranostiques, Clermont-Ferrand, France.,INRAE, ISC AgroResonance, Saint-Genès-Champanelle, France
| | - Leslie Mazuel
- INRAE, UR QuaPA, Saint-Genès-Champanelle, France.,Université Clermont Auvergne, INSERM, U1240 Imagerie Moléculaire et Stratégies Théranostiques, Clermont-Ferrand, France.,INRAE, ISC AgroResonance, Saint-Genès-Champanelle, France
| | - Elise Maubert
- Université Clermont Auvergne, INSERM, U1240 Imagerie Moléculaire et Stratégies Théranostiques, Clermont-Ferrand, France
| | - Jean-Marie Bonny
- INRAE, UR QuaPA, Saint-Genès-Champanelle, France.,INRAE, ISC AgroResonance, Saint-Genès-Champanelle, France
| | - Philippe Auzeloux
- Université Clermont Auvergne, INSERM, U1240 Imagerie Moléculaire et Stratégies Théranostiques, Clermont-Ferrand, France
| | - Sébastien Schmitt
- Université Clermont Auvergne, INSERM, U1240 Imagerie Moléculaire et Stratégies Théranostiques, Clermont-Ferrand, France
| | - Amidou Traoré
- INRAE, UR QuaPA, Saint-Genès-Champanelle, France.,INRAE, ISC AgroResonance, Saint-Genès-Champanelle, France
| | - Caroline Peyrode
- Université Clermont Auvergne, INSERM, U1240 Imagerie Moléculaire et Stratégies Théranostiques, Clermont-Ferrand, France
| | - Elisabeth Miot-Noirault
- Université Clermont Auvergne, INSERM, U1240 Imagerie Moléculaire et Stratégies Théranostiques, Clermont-Ferrand, France
| | - Guilhem Pagés
- INRAE, UR QuaPA, Saint-Genès-Champanelle, France.,INRAE, ISC AgroResonance, Saint-Genès-Champanelle, France
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Brinkhof S, Nizak R, Sim S, Khlebnikov V, Quenneville E, Garon M, Klomp DW, Saris D. In vivo biochemical assessment of cartilage with gagCEST MRI: Correlation with cartilage properties. NMR IN BIOMEDICINE 2021; 34:e4463. [PMID: 33352622 PMCID: PMC7900973 DOI: 10.1002/nbm.4463] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 07/22/2020] [Accepted: 11/30/2020] [Indexed: 06/12/2023]
Abstract
To assess articular cartilage in vivo, a noninvasive measurement is proposed to evaluate damage of the cartilage. It is hypothesized that glycosaminoglycan chemical exchange saturation transfer (gagCEST) can be applied as a noninvasive imaging technique as it would relate to electromechanical indentation and GAG content as measured with biochemical assays. This pilot study applies gagCEST MRI in total knee arthroplasty (TKA) patients to assess substantially damaged articular cartilage. The outcome was verified against electromechanical indentation and biochemical assays to assess the potential of gagCEST MRI. Five TKA patients were scanned on a 7.0 T MRI with a gagCEST sequence. Articular resurfacing cuts after TKA were obtained for electromechanical and biochemical analyses. The gagCEST MRI measurements on the medial condyle showed a moderate correlation with the GAG content, although sensitivity on the lateral condyle was lacking. Additionally, a strong negative correlation of gagCEST MRI with the electromechanical measurements was observed in the regression analysis. Correlation of gagCEST MRI with electromechanical measurements was shown, but the correlation of gagCEST MRI with GAG content was not convincing. In conclusion, gagCEST could be a useful tool to assess the GAG content in articular cartilage noninvasively, although the mismatch in heterogeneity requires further investigation.
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Affiliation(s)
- Sander Brinkhof
- Department of RadiologyUniversity Medical Center UtrechtUtrechtthe Netherlands
| | - Razmara Nizak
- Department of OrthopaedicsUniversity Medical Center UtrechtUtrechtthe Netherlands
| | | | - Vitaliy Khlebnikov
- Department of RadiologyUniversity Medical Center UtrechtUtrechtthe Netherlands
| | | | | | - Dennis W.J. Klomp
- Department of RadiologyUniversity Medical Center UtrechtUtrechtthe Netherlands
| | - Daniel Saris
- Department of OrthopaedicsUniversity Medical Center UtrechtUtrechtthe Netherlands
- MIRA Institute for Biomedical Technology and Technical MedicineUniversity of TwenteEnschedethe Netherlands
- Department of Orthopaedics, Mayo ClinicRochesterMassachusettsUnited States
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