LLight
Member
- Joined
- May 30, 2018
- Messages
- 1,417
I have no formal proof but:
1 - I have seen is an in vitro study showing that the transcription factor NFAT5 (which could be activated during intermittent dry fasting) could upregulate the CYP11A1 enzyme, the first step of steroidogenesis.
2 - I also make the hypothesis that water restriction could increase the expression of the CYP3A4 enzyme in the liver (found in mice with humanized CYP3A4 IIRC, activated by NFAT5 again) which could increase the production of oxysterols (eg. 4beta-hydroxycholesterol in serum could be a marker of CYP3A4 activity in the liver). These oxysterols are thought to be LXR ligands, another transcription factor that seems to regulate steroidogenesis in the testis. LXR also seems to be involved in water homeostasis in the kidney so I wonder if this fact reinforces the hypothesis.
1 - I have seen is an in vitro study showing that the transcription factor NFAT5 (which could be activated during intermittent dry fasting) could upregulate the CYP11A1 enzyme, the first step of steroidogenesis.
2 - I also make the hypothesis that water restriction could increase the expression of the CYP3A4 enzyme in the liver (found in mice with humanized CYP3A4 IIRC, activated by NFAT5 again) which could increase the production of oxysterols (eg. 4beta-hydroxycholesterol in serum could be a marker of CYP3A4 activity in the liver). These oxysterols are thought to be LXR ligands, another transcription factor that seems to regulate steroidogenesis in the testis. LXR also seems to be involved in water homeostasis in the kidney so I wonder if this fact reinforces the hypothesis.