Systemic progesterone for modulating electrocautery-induced secondary brain injury

Area of Science:

• Neurosurgery
• Neuroinflammation
• Neuroprotection

Background:

• Bipolar electrocautery is a common hemostatic technique in neurosurgery.
• Electrocautery can cause iatrogenic brain trauma via thermal injury and inflammation.
• Progesterone exhibits anti-inflammatory and neuroprotective properties in traumatic brain injury models.

Purpose of the Study:

• To investigate the neuroprotective effects of systemic progesterone against electrocautery-induced brain injury in an animal model.
• To evaluate the impact of progesterone on cellular responses, including astrogliosis and inflammation, following electrocautery.

Main Methods:

• Adult male Sprague-Dawley rats underwent standardized bipolar electrocautery on the cerebral cortex.
• The treatment group received intraperitoneal progesterone 2 hours pre-surgery; the control group received vehicle.
• Immunohistochemistry was used to assess astrocytic hypertrophy, astrocyte numbers, and macrophage infiltration post-injury.

Main Results:

• Progesterone significantly reduced astrocytic hypertrophy on days 1, 3, and 7 post-electrocautery.
• Progesterone treatment decreased macrophage infiltration into the injured brain area on postoperative day 3.
• The total number of astrocytes remained unaffected by progesterone treatment.

Conclusions:

• Systemic progesterone demonstrates neuroprotective effects against electrocautery-induced brain trauma in rats.
• Progesterone may mitigate iatrogenic brain injury by reducing astrogliosis and neuroinflammation.
• Further research is warranted to explore progesterone's potential in clinical neurosurgery.