Journal: medRxiv
Article Title: A DDR2-targeted PET tracer images activated fibroblasts in early pulmonary fibrosis
doi: 10.1101/2025.11.26.25341068
Figure Lengend Snippet: a , Representative longitudinal PET/CT and CT images of unilateral bleomycin (BLM)-induced pulmonary fibrosis in hFAP-knock-in (hFAP-BLM) mice imaged with 18 F-FAPI and in wild-type C57BL/6-BLM mice imaged with 68 Ga-NOTA-1A12 at days 3, 7, 14, 21, and 28 after modeling. White dashed lines delineate the fibrotic lung regions. b , Quantitative analysis of probe uptake in fibrotic lung regions expressed as SUV mean. Data are presented as mean ± SD ( n = 8∼10 per group). Statistical significance was determined using one-way ANOVA. * P < 0.05, ** P < 0.01, *** P < 0.001, **** P < 0.0001, ns: not significant. c , Schematic diagram of the sequential dual-probe PET/CT imaging protocol in the bleomycin-induced pulmonary fibrosis crab-eating macaque model. The macaque was first imaged with 18 F-FAPI on day 4 post-BLM instillation, followed by 68 Ga-NOTA-1A12 imaging on day 6 after sufficient radioactive decay. d , Representative axial, coronal, and maximum intensity projection (MIP) PET/CT images showing lung fibrotic regions with probe accumulation.
Article Snippet: To generate stable overexpression models, lentiviral vectors carrying human DDR2 or hFAP complementary DNA (IGE Biotechnology, Guangzhou, China) were constructed and co-transfected with packaging plasmids psPAX2 and pMD2.G into 293T cells using Lipofectamine 3000 (Invitrogen).
Techniques: Positron Emission Tomography-Computed Tomography, Knock-In, Imaging