[Role of ACTH fragments in regulating electrogenesis and electrotonic synaptic interaction of pond snail neurons].
Kamkin. A G AG; Kiseleva. I S IS; Kositskiĭ. G I GI
Key Findings
- ACTH4-10 makes the snail synapse act like a one‑way valve
- Shorter fragments (ACTH4-7, ACTH5-10) cause only partial one‑way behavior
- Peptide sequences can both boost and suppress two‑way signal flow depending on their makeup
Practical Outcomes
- These results hint that ACTH‑derived peptides can tweak nerve signaling, but the experiments are far removed from human biology, so there’s no direct protocol or dosage to apply for longevity or performance right now.
Summary
The study looked at tiny pieces of the hormone ACTH and how they change the way snail nerve cells talk to each other, showing that different fragments can make the connection more one‑way or affect how strong the signal is, but it was done in snails and not humans.
Abstract
The hypothesis of neuropeptides involvement in intercellular interaction was checked on the neurons VD1 and RPD2 connected with electrotonic synapse with two-way transmission in nerve ganglia of the pond snail. The preparation was perfused with natural and synthetic fragments of ACTH (2 X 10(-7) M). In perfusion with ACTH4-10 solution, synapse became rectified whereas in ACTH4-7 and ACTH5-10 solutions it obtained partially rectified properties. After exposure to ACTH4-7--Pro--Gly--Pro, synapse obtained rectifying properties with one--way increase in conductivity following temporary two-way increase of transmission efficiency. With the use of Pro--Gly--Pro--ACTH4-7--Pro--Gly--Pro, inhibition of the two--way conductivity occurred. Neuropeptides seem to modulate synaptic transmission. Impulse priority depends on the initial level of the cell MPs and is purposefully modulated by the peptides under test.
Study Information
pubmed
1986