Apelin protect against multiple organ injury following hemorrhagic shock and decrease the inflammatory response

Area of Science:

• Biomedical research
• Physiology
• Pharmacology

Background:

• Hemorrhagic shock (HS) causes multi-organ damage and fatal inflammatory responses.
• The precise mechanisms underlying HS-induced organ injury remain unclear.
• Apelin, an endogenous peptide, exhibits anti-inflammatory properties by modulating inflammatory mediators.

Purpose of the Study:

• To investigate the protective effects of apelin against multiple organ injury in HS.
• To explore the potential role of inflammatory pathways in apelin's protective effects.

Main Methods:

• Male Sprague-Dawley rats underwent induced hemorrhagic shock (HS) to a mean arterial blood pressure of 40 mmHg.
• Rats received intra-arterial apelin-13 treatment before resuscitation with shed blood reinfusion.
• Tumor necrosis factor-alpha (TNF-α) levels were measured via ELISA, and organ tissues were examined histologically.

Main Results:

• HS significantly elevated TNF-α levels, which were reduced by apelin treatment.
• Histological analysis revealed substantial organ damage in untreated HS rats.
• Apelin treatment mitigated tissue damage, decreased inflammatory cell infiltration, and reduced mitochondrial swelling.

Conclusions:

• Pre-resuscitation apelin administration confers protection against multiple organ injury in HS.
• Apelin attenuates the inflammatory response, indicating its therapeutic potential for HS.
• Apelin may serve as a viable therapeutic target for managing hemorrhagic shock.