In one fell swoop, scientists have increased from dozens to hundreds the number of known genes that control crucial steps in the development of many organisms from
fruit flies to humans.
Adult organisms ranging from
fruit flies to humans harbor adult stem cells, some of which renew themselves through cell division while others differentiate into the specialized cells needed to replace worn - out or damaged organs and tissues.
The big thing then (as now), Ruvkun says, was for researchers to demonstrate that a gene of interest exists in a spectrum of different species — from roundworms and
fruit flies to humans.
Slumber is known to improve recall in creatures from
fruit flies to humans, and the reigning theory among neuroscientists has been that the waves of brain activity during deep sleep reactivate neurons that were triggered during the day, strengthening neuronal connections and cementing them into solid memories.
They downloaded sequences of more than 700 genes from organisms ranging from
fruit flies to humans and compared genes from closely related species.
«Since these proteins are evolutionarily conserved from
fruit flies to humans, experiments of this type tell us a lot about how their human versions normally work or can go wrong.»
Kerr goes deep into the biological and scientific definitions of fear, rather than dismissing the experience solely as an emotion... «Every organism, from
the fruit fly to the human, has a defense or threat response,» she reminds.
Not exact matches
Scientists know how
to make
fruit flies and mice smarter, and efforts
to come up with a treatment for Alzheimer's and other neurological disorders are leading
to drugs that enhance memory and cognition in
humans.
But showing that circadian clock neurons in
fruit flies use external temperature
to trigger sleep suggests that some clock neurons in
humans could be similarly sensitive.
«Our study validates using
fruit flies as a model
to discover new genes that may also control aggression in
humans.»
After moving
to Berkeley, he arrived at a career crossroads in 1994, when Spyros Artavanis - Tsakonas, then at Yale, discovered and subsequently patented the
human relative of the
fruit fly gene notch, which plays a role in cell -
to - cell interactions and could be an anti-cancer target.
Montague says, «Neuroscience imaging has given people the will
to connect lots of basic neuroscience and taking it
to the
human, really applying
to the
human, those things that we've been finding in
fruit flies and monkeys.»
Our team showed that the same common gene is critical
to building limbs in
humans and
fruit flies.
Other clock researchers caution that it is too soon
to be sure that RIGUI serves the same function in mice and
humans that per does in
fruit flies.
While the same exact mechanisms are unlikely
to be at work in
humans, Dr Gilestro thinks that a lot of what they observe in
fruit flies is applicable
to higher animals: «Sleep is a fundamental process for all animals, and many of the results the community has obtained with
fruit flies have been replicated in other animals, including mammals and
humans.
Most of the rechristened genes were identified by geneticists studying the
fruit fly; when equivalent genes were later found in the
human genome, researchers simply continued using the name of the
fruit fly gene
to avoid confusion.
Already, researchers have used CRISPR / Cas9
to edit genes in
human cells grown in lab dishes, monkeys (SN: 3/8/14, p. 7), dogs (SN: 11/28/15, p. 16), mice and pigs (SN: 11/14/15, p. 6), yeast,
fruit flies, the worm Caenorhabditis elegans, zebrafish, tobacco and rice.
Inspired by
human studies showing that avid coffee drinkers and smokers have a lower risk of Parkinson's disease, scientists at the University of Washington decided
to see what java and cigarettes do
to fruit flies.
Because most animal species have integrins, Kandel thinks that experiments on
fruit fly memory could lead
to insights into
human memory.
To find out Reppert replaced those found in
fruit flies with a
human version, hCRY2, which is found in the retina.
Reppert knew that cryptochromes also help
fruit flies and birds sense the Earth's magnetic fields, and he wanted
to see whether
human cryptochromes could do the same thing.
Scientists have a promising new approach
to combating deadly
human viruses thanks
to an educated hunch by University of California, Riverside microbiology professor Shou - Wei Ding, and his 20 years of research on plants,
fruit flies, nematodes and mice
to show the truth in his theory.
By comparing our genetic make - up
to the genomes of mice, chimps and a menagerie of other species (rats, chickens, dogs, pufferfish, the microscopic worm Caenorhabditis elegans, the
fruit fly Drosophila melanogaster and many bacteria), scientists have learned a great deal about how genes evolve over time, and gained insights into
human diseases.
The recipe book for
humans, which is genetically akin
to the one for
fruit flies, is much thicker, more complex, and full of hidden ingredients scientists have yet
to discover.
In an accompanying paper, MacKinnon's team notes that scorpion toxin — a potent potassium channel inhibitor — has the same effect on pores in S. lividans and those of the
fruit fly Drosophila, whose nuclei are organized similar
to those of
human cells.
«In complex organisms, such as
fruit flies, mice, and
humans, scientists have only been able
to infer how these enzymes mechanistically accomplish their tasks,» said Daniel McKay, PhD, assistant professor of genetics and biology and first author of the paper.
«These two studies highlight the value of using an integrated multi-systems approach — including
fruit flies, mice, and
human cells —
to discover mechanisms underlying disease processes.»
The study, conducted using
fruit fly populations bred
to model natural variations in
human sleep patterns, provides new clues
to how genes for sleep duration are linked
to a wide variety of biological processes.
This same shift has been observed in
human inflammatory disorders, though previous attempts
to mimic it in lower organisms like
fruit flies or zebrafish have proved unsuccessful.
A small dose of 1.56 µM, which is approximately equivalent
to a daily dose of the drug in a
human cancer patients, increased the
fruit flies» average life expectancy by 8 %.
Paulo Navarro - Costa, first co-author of this study and researcher at the IGC explains: «Similarly
to humans,
fruit fly ovules also have a resting period during meiosis — the specialized cell division required for the formation of healthy reproductive cells.
The researchers identified genes in the
fruit fly that were equivalent
to the
human genes, but their activity didn't increase when
flies lost sleep.
For years, Paul Shaw, PhD, a researcher at Washington University School of Medicine in St. Louis, has used what he learns in
fruit flies to look for markers of sleep loss in
humans.
The
fruit fly produces stones similar
to those in
humans and has proven
to be an excellent model for exploring risk factors for stones in
humans.
Although the research was carried out in
fruit flies, or Drosophila, the scientists say the sleep mechanism is likely
to be relevant
to humans.
[Haemophilus influenzae is a bacterium, the first organism
to have its entire genome sequenced, which Venter completed in 1995; Drosophila is the common
fruit fly, whose genome Venter sequenced as a warm - up
to sequencing the
human genome.]
This means that its components and functions are similar in diverse species from simple organisms like
fruit flies to mice and even
humans.
«Worms, mice,
humans, and even
fruit flies show similar effects of intoxication at similar alcohol concentrations,» he says, and
human neurons contain a switch similar
to that in C. elegans.
Lacin and Truman believe the insights from their study will now make it possible
to investigate how molecular events, which occur from embryonic
to adult stages, control the formation and function of the nervous system in
fruit flies, with possible translation
to humans.
To understand the development of the human brain, the researchers looked to a much simpler animal, the fruit fly, in which they could control and observe cells more easil
To understand the development of the
human brain, the researchers looked
to a much simpler animal, the fruit fly, in which they could control and observe cells more easil
to a much simpler animal, the
fruit fly, in which they could control and observe cells more easily.
Insects are an important model for the study of emotion; although mice are closer
to humans on the evolutionary family tree, the
fruit fly has a much simpler neurological system that is easier
to study.
Enter the
fruit fly as an unlikely proxy for researchers
to learn more about how loud noises can damage the
human ear.
They used synapses from the
fruit fly drosophila, which compares remarkably closely
to synapses in
humans.
Their end goal is
to identify specific populations of neurons in the
fruit fly brain that are necessary for emotion primitives — and whether these functions are conserved in higher organisms, such as mice or even
humans.
The effect on the molecular underpinnings of the
fruit fly's ear are the same as experienced by
humans, making the tests generally applicable
to people, the researchers note.
Different model organisms like the
fruit fly Drosophila melanogaster are used for their research, aimed at decoding the principles of stem cell control with the aim
to also apply them
to higher forms of life and eventually
humans.
The genome shares about 60 % of its genes with the other invertebrates completely sequenced, such as the nematode and
fruit fly, whereas about 5 % match sequences found only — up
to now, at least — in the
human, mouse, and puffer fish genomes.
University of Iowa researchers say that the common
fruit fly, Drosophila melanogaster, is an ideal model
to study hearing loss in
humans caused by loud noise.
Historically, animal models — from
fruit flies to mice — have been the go -
to technique
to study the biological consequences of aging, especially in tissues that can't be easily sampled from living
humans, like the brain.
The sleep habits of
fruit flies are remarkably similar
to humans.