Related Experiment Video
Updated: Oct 23, 2025
07:11
Establishment and Validation of a Rat Model of Pulmonary Arterial Hypertension Associated with Pulmonary Fibrosis
Published on: May 23, 2025
487
Transcriptomic Characterization of Inhalation Phosphine Toxicity in Adult Male Sprague-Dawley Rats.
Matthew A Hartog1, Rebecca J Lewandowski1, Christopher S Hofmann1
1Medical Toxicology Research Division, US Army Medical Research Institute of Chemical Defense, 8350 Ricketts Point Road, Aberdeen Proving Ground, Maryland 21010, United States.
Chemical Research in Toxicology
|August 24, 2021
Summary
Phosphine gas (PH3) causes multiorgan toxicity, particularly cardiotoxicity, by altering gene expression. This study identified potential therapeutic targets, including antihypertensives and cardiac remodeling drugs.
Area of Science:
- Toxicology
- Molecular Biology
- Genomics
Background:
- Phosphine (PH3) is a toxic fumigant with an unclear toxicity mechanism.
- PH3 exposure causes multiorgan toxicity, with current treatment focused on supportive care.
- No effective antidotes for PH3 toxicity are currently available.
Purpose of the Study:
- To investigate the molecular mechanisms of PH3-induced toxicity.
- To identify specific pathways affected by PH3 exposure.
- To discover potential therapeutic targets for PH3 toxicity.
Main Methods:
- Transcriptomic analysis was performed on Sprague-Dawley rats exposed to PH3.
- Gene expression changes were mapped to pathophysiological responses using molecular pathway analysis.
- Upstream regulator analysis was used to predict counteracting therapeutics.
Main Results:
- PH3 exposure induced concentration- and time-dependent gene expression changes in multiple tissues.
- Identified toxicity pathways linked to cardiac dysfunction, arteriopathy, and enlargement, involving apelin signaling.
- Blood analysis revealed alterations in iron metabolism and erythropoietin signaling pathways.
- Predicted therapeutics include antihypertensives (losartan, candesartan, prazosin) and cardiac remodeling agents (curcumin, TIMP3).
Conclusions:
- This transcriptomics study elucidated molecular pathways underlying PH3-induced cardiotoxicity.
- The findings provide insights into PH3 toxicity mechanisms.
- Identified potential therapeutics may guide the development of medical countermeasures for PH3 poisoning.
