The Multicellular Reply She is ‘ All For One ‘
The real or perceived threats can provoke of the “a reply well-known fight or of the flight” in the human beings and the other animals. The flows of the adrenalin, and the bombs of the heart of more the quickly forced individual, the muscles work more hardly, the closed brain sharpens and systems non-essential for low. The entire organism answers in concert the end to survive.
In the molecular level, supos extensively that, in only-celled organisms, each stack perceives its environment individually — and answers to the conditions of stress –, each one in its proper ones to protect itself. In a similar way, one had thought that the stacks in organisms to multicellular answer the same way, but a new study for scientists in the northwestern university it tells in another way.
The investigators northwestern had very demonstrated something unexpected in its studies them elegans it without-end C.: The authority is made examination moved away from the individual stacks and given the two specialized neurons stress of temperature of the direction and organizes an integrated molecular reply for the entire organism.
The study, with results that show a possible parallel with of the “a reply orchestrated fight or of the flight,” May of 9 of the science of the periodical is published in the introduction.
“this was surprising — that two neurons control the reply of the 957 other stacks in elegans of the C.,” said Richard I. Morimoto, counts and professor of the cook of Gayle of biochemistry, molecular biology and the biology of the stack in the northwestern college of Weinberg of the arts and sciences. It lead the research team.
“it is established well that the only stacks answer to stress physiological in its proper ones, stack for the stack. We have shown now that this is not the case when the individual stacks if become organized to give form to an organism to multicellular. Now it is all for one — an integrated system where the stacks and the fabrics only answer to stress when the neuronal signal says to answer as an organism.”
Findings has implications for new ways to think on the illnesses that affect pathways of stress, says Morimoto. The neurons that detetam the environment govern pathways important as the reply of stress and chaperones molecular, that they play a significant paper in the aging and illnesses neurodegenerative.
In its experiences, the investigators had obstructed genetically the two neurons thermosensory (known as AFDs) and its ability of detetar the temperature and discovered there it was not no reply to stress in no stack in the organism without them. (elegans of the C. is a transparent roundworm whose genome, or the complete sequence genetic, is known and is a favourite organism of the biologists.)
“this sample, for the first time, that the molecular reply to stress physiological it is organized by the specific neurons and it suggests similarities to the reply of the neurohormonal to stress,” said Morimoto, that was first for clone a human gene of shock of the heat in 1985. “the two neurons control as all the remaining stacks in the animal direction and answer to stress physiological.”
The team also verified the “machinery” of the 957 other stacks (those that are not neurons thermosensory) in the animals of mutant and determined that the individual stacks could detetar an increase in the temperature. But, because the neurons thermosensory were not working correctly and they were not emitting signals, the stacks had not initiated a reply of shock of the heat. No signal, no reply.
The investigators had considered a model by means of that this loss of the autonomy of the stack serves to integrate the answers behavioral, metabolic and for-related to establish a organismal reply to the ambient change.
The investigators would predict, considering the results of the study, that other organisms including human beings could have had similar classrooms of the neurons that organize and orchestrate a reply to stress — an interruptor of central neuronal control for the temperature regulating and the expression of the genes that protect the health of proteins.
The article was adaptou today for Medical Notice of the release of the original press.
Beyond the Morimoto, other authors of the paper, intitled “regulation of the cellular reply of shock of the heat in elegans of Caenorhabditis for Thermosensory Neuron,” is Veena Prahlad, a postdoctoral friend, and Tyler Cornelius, a student of undergraduate, both of northwestern.
Source: Megan Fellman
Northwestern university