Tag Archive: signaling

Gut bacteria and pheromones

Gut bacteria mediate aggregation in the German cockroach Reported as: Cockroach swarming pheromones produced by gut bacteria Excerpt: … their study highlights the previously overlooked effect of gut flora in communication among insects. Next, they plan to investigate whether gut…
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Sulfated steroids and RNA-mediated identity codes

terrarium eco system

Summary: In two studies of human pheromones we linked a mixture of androsterone and androstenol to increased flirtatious behavior and reports of increased attraction to the male wearing the mixture. This blog posts explains the reason for the use of…
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The biologically-based origin of the mammalian placenta

The past is not the key to the present

Summary: In this open access journal article, Gunter Wagner’s group eliminates assumptions about mutations and ends the obfuscation of biologically-based cause and effect. Experimental evidence links ecological variation via non-living viruses to ecological adaptations manifested in the biodiversity of morphological…
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The importance of olfactory receptors

edit1

Smell Turns Up in Unexpected Places By ALEX STONEOCT. 13, 2014 Excerpt: “I’ve been arguing for the importance of these receptors for years,” said Dr. Hatt, who calls himself an ambassador of smell, and whose favorite aromas are basil, thyme…
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2014 and 2004 Nobel Prize in Medicine

neuronal-plasticity

2014 Nobel Prize in Medicine is Awarded for Discovery of Brain’s ‘Inner GPS’ Excerpt: “… gray lines show the path followed by a rat as it moves around a box looking for pieces of food.” 2014 Nobel prize in physiology…
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Physics, Chemistry, and Molecular biology (PCMb)

human-evolution

Physics, Chemistry, and Molecular biology (PCMb) link ecological variation to ecological adaptations via a model of gene-cell-tissue-organ-organ system complexity that I first presented in 1992. After adding gene activation by pheromones, I co-authored a book that linked the pheromone-controlled physiology…
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From cell type differentiation to extinction

human-evolution

The 1,300 Bird Species Facing Extinction Signal Threats to Human Health Excerpt: “Through analysis of the inner workings of birds’ cells, scientists have been deciphering increasingly urgent signals from ecosystems around the world.” My comment: Like all other organisms, birds reach…
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Something from no thing

Physics

The Bridge From Nowhere How is it possible to get something from nothing? BY AMANDA GEFTER AUGUST 7, 2014 Excerpt: “Evolution has trained us to find causal patterns at any cost. As our ancestors wandered the African savanna, the ability to…
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Stem cell memory is biophysically constrained

human-evolution

Stem Cells Remember Substrates The stiffness of a culture substrate affects the fates of stem cells. By Kerry Grens | March 16, 2014 Excerpt:” Earlier work has shown that stem cells respond to their physical environments, and studies have implicated…
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The thermodynamics of epistasis vs cancer

diseases-disorders

In “Moving forward,” which was the next to the last section of my 2013 review, I wrote (with my emphasis): “Evidence from genome-wide analysis suggests that polymorphisms cause alterations in neural connections and signaling in olfactory pathways, which contribute to…
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