| Title |
Evaluation of pulmonary perfusion by SPECT imaging using an endothelial cell tracer in supine humans and dogs
|
|---|---|
| Published in |
EJNMMI Research, May 2016
|
| DOI | 10.1186/s13550-016-0198-3 |
| Pubmed ID | |
| Authors |
Xavier Levac, François Harel, Vincent Finnerty, Quang T. Nguyen, Myriam Letourneau, Sophie Marcil, Alain Fournier, Jocelyn Dupuis |
| Abstract |
Pulmonary perfusion is not spatially homogeneously distributed, and its variations could be of diagnostic value in lung vascular disease. PulmoBind is a ligand of the adrenomedullin receptor densely expressed in endothelial cells of lung capillaries. The aim of this study was to evaluate spatial distribution of human lung perfusion by using this novel molecular tracer of the pulmonary vascular endothelium. Normal humans (n = 19) enrolled into the PulmoBind phase I trial were studied (Clinicaltrials.gov. NCT01539889 ). They were injected with (99m)Tc-PulmoBind for SPECT imaging. Results were compared with (99m)Tc-PulmoBind in quadruped mammals (dogs, n = 5). Imaging was performed in the supine position and distribution of activity was determined as a function of cumulative voxels along the different anatomical planes. PulmoBind uptake in humans was 58 ± 1 % (mean ± SEM) of the injected dose. Dorsal activity was 18.1 ± 2.1 % greater than ventral, and caudal activity was 25.7 ± 1.6 % greater than cranial. Lateral activity was only mildly higher than medial by 7.0 ± 1.0 %. In supine dogs, similar but higher PulmoBind gradients were present: dorsal 28.6 ± 2.5 %, caudal 34.1 ± 5.0 % and lateral 18.1 ± 2.0 %. The perfused pulmonary circulation of supine humans, assessed by an adrenomedullin receptor ligand, is not homogeneously distributed with more prominent distribution in dorsal and caudal regions. It is qualitatively similar to a supine quadruped mammal confirming the presence of a microcirculatory gravitational perfusion gradient detectable with this tracer. Future studies are needed to determine if this novel endothelial cell tracer could be used to detect physiologic and pathologic variations of lung perfusion such as in pulmonary hypertension. ClinicalTrial.gov, NCT01539889. |
X Demographics
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Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 8 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Canada | 1 | 13% |
| Unknown | 7 | 88% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Other | 1 | 13% |
| Lecturer | 1 | 13% |
| Student > Ph. D. Student | 1 | 13% |
| Student > Master | 1 | 13% |
| Researcher | 1 | 13% |
| Other | 1 | 13% |
| Unknown | 2 | 25% |
| Readers by discipline | Count | As % |
|---|---|---|
| Medicine and Dentistry | 2 | 25% |
| Pharmacology, Toxicology and Pharmaceutical Science | 1 | 13% |
| Chemistry | 1 | 13% |
| Immunology and Microbiology | 1 | 13% |
| Unknown | 3 | 38% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 29 May 2016.
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#20,330,976
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Outputs from EJNMMI Research
#387
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#290,742
of 338,302 outputs
Outputs of similar age from EJNMMI Research
#15
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