dorsal/arxiv
View SchemaAssociative learning in biochemical networks
| Authors | Nikhil Ghandi, Gonen Ashkenasy, Emmanuel Tannenbaum |
|---|---|
| Categories | |
| ArXiv ID | q-bio/0701010 |
| URL | https://arxiv.org/abs/q-bio/0701010 |
Abstract
We develop a simple, chemostat-based model illustrating how a process analogous to associative learning can occur in a biochemical network. Associative learning is a form of learning whereby a system "learns" to associate two stimuli with one another. In our model, two types of replicating molecules, denoted A and B, are present in some initial concentration in the chemostat. Molecules A and B are stimulated to replicate by some growth factors, denoted GA and GB, respectively. It is also assumed that A and B can covalently link, and that the conjugated molecule can be stimulated by either the GA or GB growth factors (and can be degraded). We show that, if the chemostat is stimulated by both growth factors for a certain time, followed by a time gap during which the chemostat is not stimulated at all, and if the chemostat is then stimulated again by only one of the growth factors, then there will be a transient increase in the number of molecules activated by the other growth factor. Therefore, the chemostat bears the imprint of earlier, simultaneous stimulation with both growth factors, which is indicative of associative learning. It is interesting to note that the dynamics of our model is consistent with various aspects of Pavlov's original series of associative learning experiments in dogs. We discuss how associative learning can potentially be performed in vitro within RNA, DNA, or peptide networks. We also highlight how such a mechanism could potentially be involved in genomic evolution, and suggest bioinformatics studies that could be used to find evidence for associative learning processes at work inside living cells.
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"abstract": "We develop a simple, chemostat-based model illustrating how a process\nanalogous to associative learning can occur in a biochemical network.\nAssociative learning is a form of learning whereby a system \"learns\" to\nassociate two stimuli with one another. In our model, two types of replicating\nmolecules, denoted A and B, are present in some initial concentration in the\nchemostat. Molecules A and B are stimulated to replicate by some growth\nfactors, denoted GA and GB, respectively. It is also assumed that A and B can\ncovalently link, and that the conjugated molecule can be stimulated by either\nthe GA or GB growth factors (and can be degraded). We show that, if the\nchemostat is stimulated by both growth factors for a certain time, followed by\na time gap during which the chemostat is not stimulated at all, and if the\nchemostat is then stimulated again by only one of the growth factors, then\nthere will be a transient increase in the number of molecules activated by the\nother growth factor. Therefore, the chemostat bears the imprint of earlier,\nsimultaneous stimulation with both growth factors, which is indicative of\nassociative learning. It is interesting to note that the dynamics of our model\nis consistent with various aspects of Pavlov\u0027s original series of associative\nlearning experiments in dogs. We discuss how associative learning can\npotentially be performed in vitro within RNA, DNA, or peptide networks. We also\nhighlight how such a mechanism could potentially be involved in genomic\nevolution, and suggest bioinformatics studies that could be used to find\nevidence for associative learning processes at work inside living cells.",
"arxiv_id": "q-bio/0701010",
"authors": [
"Nikhil Ghandi",
"Gonen Ashkenasy",
"Emmanuel Tannenbaum"
],
"categories": [
"q-bio.MN",
"q-bio.SC"
],
"title": "Associative learning in biochemical networks",
"url": "https://arxiv.org/abs/q-bio/0701010"
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