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This study applies a bicompartmental (BCM) model to quantify molecular expression changes in the placenta, indicative of abnormal placental remodeling, and evaluates the effectiveness of targeted contrast-enhanced ultrasound (T-CEUS) in detecting the abnormal placental vasculature. The BCM model provides high temporal resolution and differentiation of anatomical artery structures within the placenta by analyzing the distribution of contrast agents.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n \n A targeted contrast agent (TCA) composed of gas-filled microbubbles (MB), with a surface-conjugated peptide to target \u03b1\n \u03bd<\/jats:sub>\n \u03b2\n 3<\/jats:sub>\n integrin, a biomarker for angiogenesis, was used for quantifying placental vascular development. CEUS images were acquired from timed pregnant Sprague Dawley rats with experimentally-induced reduced uterine perfusion pressure (RUPP) placental insufficiency. On gestational day (GD) 18 of a 21-day gestation, CEUS images were acquired from both Normal pregnant (NP;\n n<\/jats:italic>\n \u2009=\u20096) and RUPP (\n n<\/jats:italic>\n \u2009=\u20096) dams after injection of the TCA. The BCM model was used to estimate the binding dynamics of the TCA, providing a parametric map of the binding constant (\n \n \n $${K}_{b}$$<\/jats:tex-math>\n \n \n K<\/mml:mi>\n b<\/mml:mi>\n <\/mml:msub>\n <\/mml:math>\n <\/jats:alternatives>\n <\/jats:inline-formula>\n ) of the placenta.\n <\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n The RUPP group showed a significant reduction in the value of\n \n \n $${K}_{b}$$<\/jats:tex-math>\n \n \n K<\/mml:mi>\n b<\/mml:mi>\n <\/mml:msub>\n <\/mml:math>\n <\/jats:alternatives>\n <\/jats:inline-formula>\n compared to the NP group (\n p<\/jats:italic>\n \u2009<\u20090.05). A histogram of the placental\n \n \n $${K}_{b}$$<\/jats:tex-math>\n \n \n K<\/mml:mi>\n b<\/mml:mi>\n <\/mml:msub>\n <\/mml:math>\n <\/jats:alternatives>\n <\/jats:inline-formula>\n was compared to alternative analyses (differential target enhancement, dTE and late enhancement, LE) to demonstrate that it can differentiate between anatomical artery structures with a higher contrast-to-background ratio.\n <\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n The BCM method differentiates molecular changes associated with the abnormal placental development associated with PE. It also reveals more intricate internal anatomical structures of the placenta in comparison to dTE and LE, suggesting that the BCM could enhance early detection and monitoring of PE.<\/jats:p>\n <\/jats:sec>","DOI":"10.1007\/s11307-025-01988-4","type":"journal-article","created":{"date-parts":[[2025,2,28]],"date-time":"2025-02-28T10:44:14Z","timestamp":1740739454000},"page":"274-284","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Quantifying Molecular Changes in the Preeclamptic Rat Placenta with Targeted Contrast-Enhanced Ultrasound Imaging"],"prefix":"10.1007","volume":"27","author":[{"given":"Lili","family":"Shi","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Allan K. 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