- We’re highlighting a recent article using SSP-SAP (Cat. #IT-11):
- Breathing is automatically adjusted by the brain based on the body’s carbon dioxide (CO₂) levels. Problems with the brain’s CO₂-sensing system can lead to dangerous hypoventilation disorders that are difficult to treat. Progesterone and its metabolite etonogestrel (ETO) are known to stimulate breathing and may improve the body’s response to elevated CO₂.
- Researchers tested whether ETO could restore CO₂ sensing in rats after damaging key CO₂-sensitive neurons in the brainstem using SSP-SAP. In both male and female rats, greater loss of these neurons caused greater impairment of the CO₂ chemoreflex.
- Now, ETO treatment improved breathing responses in female rats, especially when the damage was moderate. The recovery in females was linked to increased expression of two pH-sensing genes (Gpr4 and Task2) in the brainstem.
- Interestingly, male rats did not show the same improvement, suggesting that ETO restores CO₂ sensing through a sex-specific mechanism.
- These findings may help explain why progesterone-related therapies have shown mixed results and could guide future treatments for breathing disorders.
- 10% off your order of any size SSP-SAP (IT-11) or the negative control Blank-SAP (IT-21)
- Use discount code TUESDAYTIP52 for 10% off