Crest in Biological News

Caltech researchers help unlock the secrets of gene regulatory networks

... on the gene regulatory network underlying neural crest formation in the lamprey, the most primitive living vertebrate. The neural crest is a group of embryonic cells that are pinched ... stages," Bronner-Fraser says. "Because the neural crest cell type represents a vertebrate innovation, our ...

Brain structure provides key to unraveling function of bizarre dinosaur crests

... a mismatch between the external shape of the crest (which no doubt functioned as a visual display) ... small and primitive, indicating that the crest did not evolve to improve that sense. ... of the species, and the growth pattern of the crest and its high degree of variability in different ...

Alcohol consumption can cause too much cell death, fetal abnormalities

... the damage results from the death of neural crest cells, versatile cells that travel a lot during ... in development. His focus is these neural crest cells, which help form the upper part of the skull. Some neural crest cells stay in the brain and, early on, these ...

Genome sequence of small marine creature sheds light on vertebrate origins

... , +86-20-3933-2990) 3. Hijacking of neural crest genes In vertebrates, the peripheral nervous ... from a specific set of cells, known as neural crest cells. In this report, researchers in the ... are similar to vertebrate genes related to neural crest cells, however in cephalochordates they are used ...

Worm-like marine animal providing

... immunity to ward off infection. The neural crest cells of vertebrates are an excellent example of ... new functions. In all vertebrates, neural crest cells migrate from the developing neural tube ... same way as vertebrates, amphioxus has no neural crest cells. Even so, amphioxus has all of the genes ...

Origin of cells for connective tissues of skull and face challenged

... vertebrates from other creatures." The neural crest was first identified by classical embryologists ... tissues. Conventional wisdom says that the neural crest gives rise to skeletal and connective tissue of ... to understand early development of the neural crest and explore alternative explanations for ...

Home tooth bleaching slightly reduces enamel strength

... promote enamel remineralization. The products used in the study were crest Whitestrips Premium Plus, crest Whitestrips Supreme, Nite White ACP, Oral B Rembrandt and Treswhite ...

Case Western Reserve University uncovers genetic basis for some birth defects

... phenotypes indicate a critical conserved role for ERK2 signaling in neural crest development" is published in the November 10 issue of the Proceedings of ... Carolina, discovered that the mice missing the gene for ERK2 in neural crest cells had developmental defects resembling those of human patients with a ...

Key to function of dinosaur crests found in brain structure

... The CT scan results revealed a mismatch between the external shape of the crest and the internal shape of the nasal passages in closely related species, ... the sense of smell was relatively small and primitive, indicating that the crest did not evolve to improve that sense. Computer models done by other ...

New dinosaur from Mexico offers insights into ancient life on West America

... and Spanish meaning sailed forehead, in reference to the large sail-like crest that grew atop the dinosaurs head, said Rosario Gomez, director of the ... hole above their eyes. Scientists are uncertain what Velafrons fan-shaped crest would have been used for, but a leading hypothesis suggests mate ...

A genetic basis for schizophrenia

... in disease. The first paper, published in the July 2009 online issue of the journal Development , followed the role of Disc1 in cranial neural crest (CNC) cells, which are multi-potent cells that give rise to multiple cell types including craniofacial cartilage and the peripheral nervous system ...

New dinosaur species possible in Northwestern Alberta

... is a new species is the Duck bill. Miyashita says unlike the Duck bill found further north in Alaska, the Grande Prairie has a visible bump or crest on its forehead. The pair will go back to Grande Prairie area in 2010 to focus on finding other dinosaur species in the area. ...

Laughter remains good medicine

... of Loma Linda University, Loma Linda, CA, has paired with Stanley Tan, MD, PhD an endocrinologist and diabetes specialist at Oak crest Health Research Institute, Loma Linda, CA, to examine the effect of "mirthful laughter" on individuals with diabetes. Diabetes is a metabolic ...

Laughter remains good medicine

... of Loma Linda University, Loma Linda, CA, has paired with Stanley Tan, MD, PhD an endocrinologist and diabetes specialist at Oak crest Health Research Institute, Loma Linda, CA, to examine the effect of "mirthful laughter" on individuals with diabetes. Diabetes is a metabolic ...

April 2009 Geology and GSA Today media highlights

... coarsest grained, are described in the study by Milana. The wind ripples are found in the southern Argentinean Puna Plateau and reach 43 meters of crest spacing, helping fill the gap between the previously largest ripples described on Earth (over 20 meters) and the huge wind ripples found on Mars, ...

Forsyth scientists trigger cancer-like response from embryonic stem cells

... of embryonic stem cells can be controlled through bioelectrical signals, identify transmembrane voltage potential as a novel regulator of neural crest function in embryonic development, and demonstrate that potassium flows can be an important aspect of cellular environment, which is known to ...

Estimation of isolation times in the Drosophila simulans complex

... isolation, from patterns of DNA sequence variation at several genes," says Dr. Richard Kliman, associate professor of biological sciences at Cedar crest College. "The genes that we study show an unusual pattern of variation among species: those in parts of the genome characterized by low ...

Genomics of large marine animals showcased in the biological bulletin

... regulatory capacity? by Bryony Fahey, Clair Larroux, Ben Woodcroft and Bernard M. Degnan Insights from a sea lamprey into the evolution of neural crest gene regulatory network, by Tatjana Spengler Sauka and Marianne Bronner-Fraser The sea urchin genome as a window on function, by Stefan C. ...

New study finds anticipating a laugh reduces our stress hormones

... Is Associated with the Behavior of Perceptual Anticipation of Mirthful Laughter. It was conducted by Lee Berk with Stanley A. Tan, both of the Oak crest Health Research Institute, Loma Linda, CA; and Dottie Berk, Loma Linda University Health Care, Loma Linda. Lee Berk is presenting the teams findings ...

Rabbits to the rescue of the reef

... to check the weedy growth all the more remarkable. However the team noticed the rabbit fish concentrated their weed-removal efforts on the crest of the reef and were less effective on the slopes and flats a feeding preference that is yet to be explained. In a previous study, an overgrown ...

February Geology and GSA Today media highlights

... 50121 Firenze, Italy. Pages 131-134. Active fluid release occurs through numerous vents located within an elliptical depression developed over the crest of an anticline associated with the active Pede-Apennine thrust front of the Northern Apennines (Italy). Bonini interprets this depression as a ...

December GEOLOGY and GSA TODAY media highlights

... Lava flows erupted in 20052006 at the East Pacific Rise (EPR) and covered an area of 14.6 square kilometers along approximately 18 km of the EPR crest between 946′ and 956′N. The 20052006 lava is characterized by inflated lobate and sheet morphologies in the flow interiors, and pillow ...

NASA celebrates a decade observing climate impacts on health of world's oceans

... students and educators around the world. The mission was able to capitalize on advances in data processing and storage technologies and ride the crest of the World Wide Web's growth from its beginning. When the SeaWiFS program launched in 1997, the goal was to place a sensor in space capable of ...

NASA celebrates a decade observing climate impacts on health of world's oceans

... students and educators around the world. The mission was able to capitalize on advances in data processing and storage technologies and ride the crest of the World Wide Web's growth from its beginning. When the SeaWiFS program launched in 1997, the goal was to place a sensor in space capable of ...

Stem cells found in adult hair follicles may provide alternative to embryonic stem cells

... the molecular signature of these epidermal neural crest stem cells in the mouse, their research resolves ... a valuable resource for future mouse neural crest stem cell research. A report on the research ... and Proliferation. Epidermal neural crest stem cells are found in the bulge of hair ...

Making a face: A new and earlier marker of neural crest development

... RT-PCR of mRNAs -- that formation of neural crest cells in chick embryos is independent of both ... also identify, Pax7, as an early marker of neural crest formation and prove that its function is required ... earliest stages of development. The neural crest is a population of stem cells that migrate ...

UF scientists trace origin of shark's electric sense

... of Evolution & Development, identifies neural crest cells, which are common in vertebrate ... found two independent genetic markers of neural crest cells in the animal's electricity-sensing organs. ... may have developed with involvement of neural crest cells is valuable for people trying to ...

FSU biologist says new dinosaur is oldest cousin of Tyrannosaurus rex

... tyrannosaur but also the sexiest," Erickson said, what with its flashy crest atop its small head –?an extravagant ornament likely used only for ... full maturity by the end of its relatively long 13-year life. Its cranial crest would have reached its full size by then, thus providing an accurate model ...

Scientists discover new species of distinctive cloud-forest rodent

... The nocturnal, climbing rodent is beautiful yet strange looking, with long dense fur, a broad blocky head, and thickly furred tail. A blackish crest of fur on the crown, nape and shoulders add to its distinctive appearance. Isothrix barbarabrownae, as the new species has been named, is ...

Coral reefs are increasingly vulnerable to angry oceans

... to the threshold from the last big storm, and then suddenly nothing above it," said Connolly. "They even followed the predicted trends from the reef crest to the reef back." The researchers say that more severe storms, by themselves, would probably not pose a large threat to reefs. "Corals are ...

Stormy days ahead for coral reefs

... above it," says Dr Connolly, a CoECRS researcher and Senior Lecturer at James Cook University. "They even followed the predicted trends from the reef crest to the reef back." The researchers say that more severe storms, by themselves, would probably not pose a large threat to reefs. "Corals are ...

Scientists describe new African monkey genus ?first in 83 years

... grayish brown fur, with off-white fur on the belly and the end of their long, mainly curled-up tail. They have a "crown" made up of a very broad crest of long, erect hair. Adults make a distinctive, loud, low-pitched honk-bark. An omnivore, Kipunji eat leaves, shoots, flowers, bark, fruit, lichen, ...

Stem cells found in adult skin can be transplanted and function in mouse models of disease

... or SKPs) based on the role played by neural-crest stem cells during embryogenesis. In addition to generating the peripheral nervous system, neural crest stem cells generate other tissues such as bone, cartilage, some types of muscle, and even part of the heart. In The Journal of Neuroscience paper, ...

Duck-billed dino crests not linked to sense of smell

... the animal's sense of smell. "From the brain case, there's no indication that the nerves curled upwards into the crest, as we would expect if the crest was used for the sense of smell," Evans says. "It appears that the brain changed very little from their non-crested dinosaur ancestors, and that ...

Researchers discover why melanoma is so malignant

... eventually gives rise to a variety of cell types in the adult, including dermal melanocytes. In this early embryonic stage, Slug enables the neural crest cells to travel, and then settle, throughout the developing embryo. "Slug is a key component of the neural crest's ability to migrate," says ...

A New Species of Monkey is Discovered in Tanzania: The First in Africa for More Than 20 Years

... under our noses." The new arboreal mangabey is brown, with a head and body length of about 3 ft (90 cm). It is characterized by a long, erect crest of hair on its head, elongated cheek whiskers, an off-white belly and tail, and an unusual call, termed a 'honk-bark' by the authors. The monkeys ...

Vital step in cellular migration described by UCSD medical researchers

... enzymes that block Rac activity only at the rear of a crawling cell. The scientists noted that alpha4 integrins are widely expressed in neural crest cells, immune system leukocytes (such as T cells), striated and smooth muscle, and neurons. For this reason, they believe the mechanism used by ...