Perhaps something to track over time:
ROCK inhibitors have potential therapeutic applicability in a wide variety of pathological conditions including asthma, cancer, erectile dysfunction, glaucoma, insulin resistance, kidney failure, neuronal degeneration, and osteoporosis.
ROCK inhibition may explain the benefits of Reishi mushrooms.
With regard to “clinical applications for anti-erectile dysfunction”, ROCK inhibition seems to be the mechanism of action of Tongkat Ali, the Malaysian natural Viagra.
How do ROCK inhibitors affect lifespan?
ROCK (Rho-associated protein kinase) inhibitors may affect lifespan in the following ways:
• Reduced cell senescence: ROCK inhibitors suppress the activity of Rho GTPases, which are involved in regulating cell senescence. By reducing Rho GTPase activity, ROCK inhibitors could decrease senescent cellular changes that occur with aging and shorten lifespan. This may help slow the aging process and increase lifespan.
• Stabilized cytoskeleton: ROCK inhibitors also stabilize the cytoskeleton, which can become unstable with aging. By preserving cytoskeletal stability, ROCK inhibitors may reduce cytoskeletal aging and dysfunction that contribute to cellular decline with aging. This could have lifespan-extending effects.
• Decreased inflammation: In addition, ROCK inhibitors dampen inflammation by blocking the effects of Rho GTPases, which regulate inflammatory processes. Lowering inflammation may slow age-related degeneration and increase longevity.However, more research is needed to directly determine how ROCK inhibitors influence aging and lifespan. These inhibitors target specific aspects of Rho GTPase signaling, but may have other effects that could either increase or decrease lifespan. Further study is required to fully understand the impacts of ROCK inhibitors on aging and lifespan, and how they can be safely used to promote longevity. Overall, ROCK inhibitors hold promise for slowing aging, but their effects on lifespan would depend on their particular biological activities and consequences.
https://pubs.acs.org/doi/full/10.1021/acsnano.5c11482#
Short version: CEPT keeps fragile, lonely neurons alive by shutting down multiple early-death programs at once, while a plain ROCK inhibitor just stops them from ripping themselves apart the first couple days. After that, cells need more than “less blebbing.” They need translation, anti-apoptosis, and general stress control. CEPT covers all of it; ROCKi doesn’t.
What each part is doing (stacked effects):
• Chroman-1 (the “C”): a more potent ROCK1/2 inhibitor than the usual Y-27632. It reduces actomyosin tension and membrane blebbing, so cells attach and don’t die of dissociation-induced anoikis. Helpful in days 0–2, but not a full survival plan. 
• Emricasan (the “E”): pan-caspase blocker that directly suppresses the executioner phase of apoptosis while the cells are still stressed and isolated. Think “you can’t press the self-destruct button if I removed the button.” 
• Polyamines (the “P”): stabilize RNA and membranes, tune translation and autophagy, and generally buffer stress. They make the cellular housekeeping less chaotic while synapses and adhesions mature. 
• trans-ISRIB (the “T”): disables the integrated stress response by re-activating eIF2B, so protein synthesis keeps running instead of shutting down into stress-granule sulking. That’s crucial after day 2–3 when neurons must synthesize a lot of proteins to grow neurites and form circuits. 
Why CEPT outlasts ROCKi:
• Early on, survival is limited by mechanical/cytoskeletal shock from dissociation. ROCK inhibition fixes that, which is why you see a benefit through about day 5. After that, limiting factors shift to translation capacity, mitochondrial and ER stress, and caspase-mediated pruning. CEPT hits all those layers, so the benefit persists as cells transition from “don’t die” to “build networks.” 
Empirical backdrop:
• The original CEPT work showed markedly higher survival and cloning efficiency for single cells by combining ROCKi with caspase inhibition, polyamines, and ISR blockade. It was discovered via high-throughput screening, then validated across passaging, cloning, gene editing, and organoid contexts. In multiple follow-ups, CEPT improves aggregation quality and long-term tissue fitness, not just day-1 stickiness. 
So yes: ROCKi calms the immediate drama; CEPT keeps the lights on, the kitchen stocked, and the construction crew paid until the “circuit” is actually built. Biology is needy like that.
https://longevityknowledge.app/open-problems/483#solutions
they might be rly relevant for autism too
Rock Inhibition Boosts Old Activated Neural Stem Cell Migration and Proliferation
Next, they wanted to find a molecular target that could counteract the increased adhesion strength observed in activated brain stem cells. This would be done to restore the age-related mobilization of old activated brain stem cells and their offspring out of the niche, which would ultimately lead to an improvement in neurogenesis in the older brain. An in-depth investigation into the underlying mechanisms of this phenomenon revealed that aging not only increases the number of adhesions but also the adhesion strength of activated old brain stem cells. They then determined that the most important component of this process was a pathway known as the ROCK pathway.
Old activated brain stem cells that had been cultured were treated with a small molecule ROCK inhibitor (Y-27632) to see if they could reverse the increase in cell adhesion normally associated with aging in old activated brain stem cells. This was done to determine whether or not the ROCK pathway could be utilized to reverse the effect. They discovered that inhibiting ROCK could get rid of adhesions in activated brain stem cells taken from older mice. In addition, the inhibition of ROCK resulted in a speed increase in the migration of these cells.
(Yeo et al., 2023 | Nature Aging) ROCK inhibition boosts migration speed in activated neural stem cells cultured from aged brains. These plots are quantifications of the speed (left) and distance (right) of cultured brain stem cells from young and aged mice that were treated with a ROCK inhibitor (ROCKi).
Finally, the Stanford researchers investigated whether or not the inhibition of ROCK in cell culture could be applied to animals. With the help of a mini-osmotic pump, the ROCK inhibitor was injected into the lateral ventricles of the elderly mice. These ventricles—which carry a clear, colorless, watery fluid that flows in and around your brain and spinal cord called cerebrospinal fluid—are located near the subventricular zone neurogenic niche.
It is interesting to note that the delivery of ROCK inhibitors into the ventricles resulted in a significant increase in the migration of activated brain stem cells away from the ventricle in a manner that was analogous to the activity of young brain stem cells. In addition, the inhibition of ROCK increased the number of new neurons found in the olfactory bulbs of older mice. Therefore, inhibiting the ROCK pathway might be a good strategy for improving the migratory properties of old activated brain stem cells (and their offspring) and for boosting neurogenesis in older brains.
