Molecular imaging of chemokine-like receptor 1 (CMKLR1) in experimental acute lung injury

Philip Z. Mannes, Clayton E. Barnes, Jana Biermann, Joseph D. Latoche, Kathryn E. Day, Qin Zhu, Mohammadreza Tabary, Zeyu Xiong, Jessie R. Nedrow, Benjamin Izar, Carolyn J. Anderson, Flordeliza S. Villanueva, Janet S. Lee, Sina Tavakoli

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


The lack of techniques for noninvasive imaging of inflammation has challenged precision medicine management of acute respiratory distress syndrome (ARDS). Here, we determined the potential of positron emission tomography (PET) of chemokine-like receptor-1 (CMKLR1) to monitor lung inflammation in a murine model of lipopolysaccharide-induced injury. Lung uptake of a CMKLR1-targeting radiotracer, [64Cu] NODAGA-CG34, was significantly increased in lipopolysaccharide-induced injury, correlated with the expression of multiple inflammatory markers, and reduced by dexamethasone treatment. Monocyte-derived macrophages, followed by interstitial macrophages and monocytes were the major CMKLR1-expressing leukocytes contributing to the increased tracer uptake throughout the first week of lipopolysaccharide-induced injury. The clinical relevance of CMKLR1 as a biomarker of lung inflammation in ARDS was confirmed using single-nuclei RNA-sequencing datasets which showed significant increases in CMKLR1 expression among transcriptionally distinct subsets of lung monocytes and macrophages in COVID-19 patients vs. controls. CMKLR1-targeted PET is a promising strategy to monitor the dynamics of lung inflammation and response to anti-inflammatory treatment in ARDS.

Original languageEnglish
Article numbere2207608119
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number3
StatePublished - Jan 17 2023


  • CMKLR1
  • acute lung injury
  • inflammation
  • macrophage
  • positron emission tomography


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