Liver and Kidney Tissues Under Opioid Exposure: Rewriting and Old Story Through Proteomics and MALDI-MSI

Area of Science:

• Proteomics and Lipidomics
• Toxicology
• Pharmacology

Background:

• Morphine is widely used for pain management.
• Understanding morphine's organ-specific effects is crucial for patient safety.
• Proteomic and lipidomic analyses offer insights into cellular responses to drugs.

Purpose of the Study:

• To investigate the proteomic and lipidomic changes in rat liver and kidney following morphine exposure.
• To identify potential organ-specific toxicity markers of morphine.

Main Methods:

• Proteomic analysis of rat liver and kidney tissues after 10 days of morphine administration (10 mg/kg).
• Matrix-assisted laser desorption/ionization mass spectrometry imaging (MALDI-MSI) for lipidomic analysis.
• Comparison of protein and lipid expression profiles between treated and control groups.

Main Results:

• Significant alterations in protein expression were observed in both liver and kidney, affecting apoptosis, oxidative stress, metabolism, and splicing.
• Kidney tissues showed a broader range of proteomic alterations compared to liver tissues.
• While liver lipid profiles remained unchanged, kidneys exhibited significant lipidomic alterations, indicating increased vulnerability.

Conclusions:

• Rat kidneys appear more susceptible to morphine-induced toxicity or metabolite effects than the liver.
• Proteomic and lipidomic approaches can identify early-stage toxicity markers for morphine.
• These findings could aid in developing safer therapeutic strategies, especially for patients with pre-existing renal or hepatic conditions.