Inhaled Halogen-Induced Oxidative Renal Damage and Dysfunction: A Lung Heart Kidney Axis

Area of Science:

• Toxicology
• Nephrology
• Cardiovascular Medicine

Background:

• Acute exposure to halogen gases like bromine and chlorine causes severe pulmonary and cardiac injury.
• Secondary renal complications following halogen-induced organ damage are not well understood.

Purpose of the Study:

• To evaluate secondary renal complications after acute exposure to bromine and chlorine.
• To assess renal function, injury biomarkers, and structural changes in response to halogen gas exposure.

Main Methods:

• Rats were exposed to bromine or chlorine.
• Renal function, urine and kidney injury biomarkers (creatinine, BUN, KIM-1, NGAL), hemodynamic parameters (MAP, RVR), and kidney tissue structure were assessed.
• Long-term effects including fibrosis and oxidative stress markers were evaluated after 4 weeks.

Main Results:

• Halogen exposure significantly increased blood creatinine and BUN, indicating acute renal stress.
• Elevated urinary protein, albumin, and RBP4, along with increased KIM-1, NGAL, and osteopontin, demonstrated substantial kidney damage and tubular injury.
• Hemodynamic changes included increased MAP and RVR, decreased renal artery diameter and blood flow, and evidence of oxidative stress and fibrosis, suggesting progression from AKI to CKD.

Conclusions:

• Acute halogen gas exposure induces significant renal dysfunction and injury, characterized by oxidative stress and potential progression to chronic kidney disease.
• Victims of halogen exposure face increased risks of cardiovascular events and renal complications, including AKI.