1
|
Zhang D, Shi Y, Kong J, Chen N, Li G, Wang M, Zhang G, Zhai C. Early diagnosis and staging of paraquat-induced pulmonary fibrosis using [ 18F]F-FAPI-42 PET/CT imaging. EJNMMI Res 2024; 14:57. [PMID: 38888802 PMCID: PMC11189367 DOI: 10.1186/s13550-024-01118-1] [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: 03/25/2024] [Accepted: 06/02/2024] [Indexed: 06/20/2024] Open
Abstract
BACKGROUND Paraquat (PQ) -induced pulmonary fibrosis poses a significant medical challenge due to limited treatment options and high mortality rates. Consequently, there is an urgent need for early diagnosis and accurate staging to facilitate appropriate treatment strategies. In this study, we assessed the diagnostic potential of [18F]F-FAPI-42 PET/CT imaging for early detection and disease staging in a rat model of PQ-induced lung fibrosis. METHODS After administering 80 mg/kg of PQ orally to Sprague-Dawley rats, we intravenously injected 3-3.5 MBq of [18F]F-FAPI-42 on day 7, 14, and 21 post-dosing. Dynamic PET/CT imaging was carried out for one hour immediately after the administration of [18F]F-FAPI-42. Subsequently, the lung tissues were collected for Hematoxylin and Eosin (HE) staining, Masson's trichrome staining, and NOTA-FAPI-04-MB fluorescent probe staining. Data analysis was performed using the Imalytics preclinical software, and the mean standardized uptake value (SUVmean) was calculated. RESULTS PET signals revealed that in areas with evident lesions on CT, the SUVmean on day 14 was significantly higher than on day 7 and 21, indicating that changes in fibrosis activity levels contribute to the staging of pulmonary fibrosis. Additionally, the NOTA-FAPI-04-MB fluorescent probe staining also demonstrated the most pronounced probe uptake on day 14. In regions without apparent lesions on CT, the SUVmean gradually increased from day 7 to day 21, reflecting ongoing fibrotic activity. Moreover, HE staining and Masson's trichrome staining did not reveal pulmonary fibrosis, while PET imaging was able to detect it, serving the purpose of early diagnosis. At 30 min and 60 min, the target-to-background ratio (TBR) of the PQ groups on day 7, 14, and 21 was significantly higher than the control group, suggesting a high specificity of [18F]F-FAPI-42 binding to activated fibroblasts. CONCLUSION [18F]F-FAPI-42 PET/CT imaging enables early diagnosis and staging of PQ-induced pulmonary fibrosis, demonstrating its feasibility and potential for characterizing early disease stages.
Collapse
Affiliation(s)
- Dimei Zhang
- Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, 510515, China
| | - Yusheng Shi
- Department of Radiation Oncology, Zhuhai People's Hospital, Zhuhai Hospital Affiliated with Jinan University, Zhuhai, 519000, China
| | - Jiangwei Kong
- School of Forensic Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Na Chen
- Department of Pathology, Guangdong Women and Children Hospital, Guangzhou, 511400, China
| | - Guiting Li
- Research and Development Center, Guangdong Huixuan Pharmaceutical Technology Co., Ltd., Guangzhou, 510765, China
| | - Mingfang Wang
- Research and Development Center, Guangdong Huixuan Pharmaceutical Technology Co., Ltd., Guangzhou, 510765, China
| | - Guoxia Zhang
- Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, Guangzhou, 510515, China.
| | - Chuangyan Zhai
- Department of Nuclear Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
- School of Forensic Medicine, Southern Medical University, Guangzhou, 510515, China.
| |
Collapse
|
2
|
Yanina IY, Genin VD, Genina EA, Mudrak DA, Navolokin NA, Bucharskaya AB, Kistenev YV, Tuchin VV. Multimodal Diagnostics of Changes in Rat Lungs after Vaping. Diagnostics (Basel) 2023; 13:3340. [PMID: 37958237 PMCID: PMC10650729 DOI: 10.3390/diagnostics13213340] [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: 07/20/2023] [Revised: 10/09/2023] [Accepted: 10/13/2023] [Indexed: 11/15/2023] Open
Abstract
(1) Background: The use of electronic cigarettes has become widespread in recent years. The use of e-cigarettes leads to milder pathological conditions compared to traditional cigarette smoking. Nevertheless, e-liquid vaping can cause morphological changes in lung tissue, which affects and impairs gas exchange. This work studied the changes in morphological and optical properties of lung tissue under the action of an e-liquid aerosol. To do this, we implemented the "passive smoking" model and created the specified concentration of aerosol of the glycerol/propylene glycol mixture in the chamber with the animal. (2) Methods: In ex vivo studies, the lungs of Wistar rats are placed in the e-liquid for 1 h. For in vivo studies, Wistar rats were exposed to the e-liquid vapor in an aerosol administration chamber. After that, lung tissue samples were examined ex vivo using optical coherence tomography (OCT) and spectrometry with an integrating sphere. Absorption and reduced scattering coefficients were estimated for the control and experimental groups. Histological sections were made according to the standard protocol, followed by hematoxylin and eosin staining. (3) Results: Exposure to e-liquid in ex vivo and aerosol in in vivo studies was found to result in the optical clearing of lung tissue. Histological examination of the lung samples showed areas of emphysematous expansion of the alveoli, thickening of the alveolar septa, and the phenomenon of plasma permeation, which is less pronounced in in vivo studies than for the exposure of e-liquid ex vivo. E-liquid aerosol application allows for an increased resolution and improved imaging of lung tissues using OCT. Spectral studies showed significant differences between the control group and the ex vivo group in the spectral range of water absorption. It can be associated with dehydration of lung tissue owing to the hyperosmotic properties of glycerol and propylene glycol, which are the main components of e-liquids. (4) Conclusions: A decrease in the volume of air in lung tissue and higher packing of its structure under e-liquid vaping causes a better contrast of OCT images compared to intact lung tissue.
Collapse
Affiliation(s)
- Irina Yu. Yanina
- Institution of Physics, Saratov State University, 410012 Saratov, Russia; (V.D.G.); (E.A.G.); (V.V.T.)
- Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, 634050 Tomsk, Russia; (A.B.B.); (Y.V.K.)
| | - Vadim D. Genin
- Institution of Physics, Saratov State University, 410012 Saratov, Russia; (V.D.G.); (E.A.G.); (V.V.T.)
- Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, 634050 Tomsk, Russia; (A.B.B.); (Y.V.K.)
- Science Medical Center, Saratov State University, 410012 Saratov, Russia
| | - Elina A. Genina
- Institution of Physics, Saratov State University, 410012 Saratov, Russia; (V.D.G.); (E.A.G.); (V.V.T.)
- Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, 634050 Tomsk, Russia; (A.B.B.); (Y.V.K.)
- Science Medical Center, Saratov State University, 410012 Saratov, Russia
| | - Dmitry A. Mudrak
- Department of Pathological Anatomy, Saratov State Medical University, 410012 Saratov, Russia; (D.A.M.); (N.A.N.)
| | - Nikita A. Navolokin
- Department of Pathological Anatomy, Saratov State Medical University, 410012 Saratov, Russia; (D.A.M.); (N.A.N.)
- Experimental Department, Center for Collective Use of Experimental Oncology, Saratov State Medical University, 410012 Saratov, Russia
- State Healthcare Institution, Saratov City Clinical Hospital No. 1 Named after Yu.Ya. Gordeev, 410017 Saratov, Russia
| | - Alla B. Bucharskaya
- Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, 634050 Tomsk, Russia; (A.B.B.); (Y.V.K.)
- Science Medical Center, Saratov State University, 410012 Saratov, Russia
- Department of Pathological Anatomy, Saratov State Medical University, 410012 Saratov, Russia; (D.A.M.); (N.A.N.)
| | - Yury V. Kistenev
- Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, 634050 Tomsk, Russia; (A.B.B.); (Y.V.K.)
| | - Valery V. Tuchin
- Institution of Physics, Saratov State University, 410012 Saratov, Russia; (V.D.G.); (E.A.G.); (V.V.T.)
- Laboratory of Laser Molecular Imaging and Machine Learning, Tomsk State University, 634050 Tomsk, Russia; (A.B.B.); (Y.V.K.)
- Science Medical Center, Saratov State University, 410012 Saratov, Russia
- Institute of Precision Mechanics and Control, FRC “Saratov Scientific Centre of the Russian Academy of Sciences”, 410028 Saratov, Russia
| |
Collapse
|
3
|
Vorster M. Gallium-68 Labelled Radiopharmaceuticals for Imaging Inflammatory Disorders. Semin Nucl Med 2023; 53:199-212. [PMID: 36270829 DOI: 10.1053/j.semnuclmed.2022.08.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 08/18/2022] [Accepted: 08/22/2022] [Indexed: 12/24/2022]
Abstract
Inflammation is an important component of several chronic and debilitating diseases that result in significant morbidity and mortality. This is best evidenced within the cardiovascular system where it may manifest as atherosclerosis or myocarditis, and at the extreme end of the spectrum as myocardial infarction, ventricular remodeling, or cardiac failure. Early non-invasive detection and monitoring of inflammation in these and other settings may better guide patient management with resultant improved outcomes. Key role players in inflammation pathophysiology include chemokines, macrophages, neutrophils, fibroblasts, integrins, and reactive oxygen species, amongst others. Examples of receptor expression and over-expression include somatostatin receptors, CXCR4-, folate-, mannose-, TSPO- receptors and secretion of various vascular adhesion molecules (such as VCAM and ICAM). Gallium-68-based PET offers imaging possibilities for nearly all the major pathophysiological role players in inflammation, with mounting recent interest in macrophage differentiation, various forms of receptor expression and secretion of chemokines and vascular adhesion molecules. The advantages in terms of logistics and costs of having generator-produced PET probes available is well known, and a 68Ga-based tracer provides easily translatable theranostic possibilities to especially Lu-177. Some of the more versatile and better validated Ga-68-based inflammation probes include 68Ga-DOTA-TATE/NOC/TOC, 68Ga-NOTA-RGD, 68Ga-CXCR4, 68Ga-citrate and 68Ga-FAPI.
Collapse
Affiliation(s)
- Mariza Vorster
- Nuclear Medicine, Department of Nuclear Medicine at Inkosi Albert Luthuli Hospital, University of KwaZulu-Natal, Berea, KwaZulu-Natal, South Africa.
| |
Collapse
|
4
|
Grenier PA, Hoffman EA, Screaton N, Seo JB. BJR functional imaging of the lung special feature: introductory editorial. Br J Radiol 2022; 95:20229004. [PMID: 35312377 PMCID: PMC9153701 DOI: 10.1259/bjr.20229004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
| | - Eric A Hoffman
- University of Iowa Carver College of Medicine, Iowa City, Iowa, USA
| | | | - Joon Beom Seo
- University of Ulsan College of Medicine, Songpa-gu, Seoul, South Korea
| |
Collapse
|