Articles tagged with Melanosomes
Researchers developed an index to optimize picosecond laser treatment for skin blemishes, showing low complication rates and high efficacy. The wavelength-dependent indicators are expected to improve the safety and effectiveness of the treatment.
A team of Osaka University researchers discovered a link between Rab32 and Rab38 proteins, crucial for both hair pigmentation and bone resorption. Double-knockout mice showed increased bone density and altered physical characteristics, highlighting the importance of these proteins in maintaining bone homeostasis.
A study published in Science has identified 135 previously unknown genes associated with pigmentation, shedding light on the regulation of melanin production in humans. The research could help protect lighter-skinned individuals from skin cancer and develop new treatments for vitiligo and other pigmentation diseases.
Researchers have discovered a natural nanostructure in birds that produces iridescent shimmer, finding an evolutionary tweak in feather nanostructure that has more than doubled the range of iridescent colors. This insight could inspire new materials that capture or manipulate light.
Researchers propose a new model to simulate temperature rise of laser-heated skin, taking into account melanosome pigments. The model predicts that darker skin is more prone to damage from laser irradiation.
Researchers have discovered that at least 16 species of deep-sea fish have evolved ultra-black skin that absorbs most of the light, allowing them to blend in and avoid detection. The unique shape and arrangement of melanosomes in these fish's skin cells enables this remarkable camouflage.
Researchers discovered microscopic feather features in cassowaries, revealing the mechanism behind their glossy black shine. They also analyzed a 52-million-year-old fossil bird's feathers, finding structural colors that challenge previous assumptions about extinct species.
A new study reveals that the unique shape of hummingbird melanosomes and air bubbles within their feathers produce shimmering rainbow colors. This discovery opens up a greater understanding of how hummingbirds develop their vibrant plumage, with findings that could also shed light on color patterns in other birds.
Using anesthetics to study fish colors can be misleading due to altered coloration. Researchers studying colorful patterns in small fish species found that common anesthetics affected hue, saturation, and brightness.
The study found that melanosome size and geometry vary between species and organs within a species. Melanosomes from fossils differ significantly in size, geometry, and chemistry depending on body region, suggesting a role for melanosomes in metal metabolism and providing new insights into extinct vertebrate anatomy.
Researchers from the University of Bristol have discovered that melanosomes in blue feathers are highly distinct and can reconstruct prehistoric feather colors. They found blue structural color in fossils, previously unknown, by analyzing pigments and feather structures.
Researchers studied 97 modern bird species with iridescent plumage, finding diverse melanosomes that produce varying colors. The study predicts fossil birds may have had similar iridescent displays, revealing new insights into dinosaur behavior.
The newly discovered species of dinosaur, Caihong juji, had rainbow-colored feathers that shimmered and shifted in the light. Its unique feather structure was matched to modern birds with similarly shaped melanosomes, indicating a prehistoric version of a peacock's iridescent tail.
Researchers have retrieved original pigment, beta-keratin and muscle proteins from a 54-million-year-old sea turtle hatchling, providing direct evidence that a pigmentation-based survival trait evolved in ancient sea turtles. The study confirms the preservation of multiple proteins over millions of years.
Researchers at UC San Diego have developed nanoparticles that mimic the behavior of natural melanosomes, protecting skin cells from UV radiation. These synthetic melanin-like nanoparticles show promise as artificial melanosomes for novel therapy development.
A team of international scientists has discovered beta-keratin in a 130 million-year-old bird feather fossil, providing evidence that melanosomes are present in these structures. This finding sheds new light on the molecular preservation of tissues in ancient fossils.
Researchers have found evidence of preserved keratin and melanosomes in a 130-million-year-old bird fossil, extending the timeframe for molecular preservation. The discovery supports the identity of ancient microstructures and sheds new light on feather evolution.
Scientists at Brown University have discovered a molecular 'brake' that regulates melanin production in the eyes, skin, and hair. The study found that TPC2, a protein channel, reduces melanin production by increasing acidity in melanosomes.
Researchers at the University of Leicester identified the ancient 'Tully Monster' as a vertebrate, solving a 300 million-year-old mystery. The discovery was made possible by analyzing the fossil's melanosomes, which contain melanin, and revealed two distinct shapes, indicating that the creature had good vision.
Scientists utilize advanced molecular techniques to clarify dinosaur color, distinguishing melanosomes from microbial coats. By analyzing keratin and ToF-SIMS results, researchers confirm the presence of melanin in fossilized feathers, shedding light on ancient color patterns.
Researchers use combined techniques to determine color of ancient bat species, finding they were both reddish-brown. The study uses fossilized melanin to infer color, showing a correlation between melanin shape and color.
Researchers detect melanin in fossilized tissues of fish, frogs, and other ancient animals, revealing their original color patterns. The discovery sheds light on the evolution of color recognition in ancient life forms.
Researchers have found evidence that melanosomes, which produce melanin pigment, are preserved in the fossil record of Anchiornis huxleyi, a bird-like dinosaur. The study uses electron microscopy and chemical analysis to demonstrate that the microbodies are indeed melanosomes, not microbes.
Scientists have discovered that a genetic mutation associated with type 2 oculocutaneous albinism blocks ion channels in melanosomes, leading to a lack of melanin production. The study provides new insights into the molecular mechanisms underlying albinism and may inspire new treatment ideas.
New research from North Carolina State University suggests that it is not yet possible to tell if microscopic structures in fossilized feathers are melanosomes, which contain pigment, or ancient bacteria. Researchers used various microscopy techniques to examine the structures and compared them to melanosomes found in living birds.
A study revising rules for deciphering dinosaur color suggests a link between color, physiology, and the origin of flight. Researchers found diverse melanosome shapes and sizes in feathered dinosaurs, paravians, and living mammals and birds.
Researchers found that African starlings can change their colors up to 10 times faster than their ancestors, leading to the emergence of new species. This is made possible by four types of modified melanosomes that interact with light in different ways.
A team of researchers discovered a well-preserved feather on Archaeopteryx's wing was black, indicating the presence of melanosomes that provided structural support. The feather structure is identical to that of modern birds, showing early evolution of wing feathers as early as 150 million years ago.
A 36-million-year-old fossil reveals that ancient penguins had reddish-brown and grey feathers, distinct from the black tuxedoed look of living penguins. This discovery provides insights into the early evolution of penguin feathers, coloration, and flipper shapes.
A team of researchers discovered fossilized feathers from a giant penguin species that lived near the Equator over 36 million years ago. The feathers revealed softer gray or reddish-brown colors, unlike modern penguins' predominantly black and white feathers.
A team of Yale scientists has deciphered the color palette of a 150-million-year-old feathered dinosaur, Anchiornis huxleyi, revealing rich patterns and colors previously unknown. The analysis suggests that dinosaur feathers evolved for communication, rather than just flight.
Researchers identify color patterns in dinosaur feathers, revealing that they originated for display purposes before becoming useful for flight and insulation.
Researchers found that damaged melanosomes are toxic to melanoma cells and that functional melanosomes in late-stage cancer cells make them more resistant to treatment. Manipulating melanosome status could lead to new therapeutic avenues for treating pigment-producing cell-related diseases.
The study reveals that Pme117, a glycoprotein involved in melanosomes, rapidly folds into functional amyloid fibers that enhance melanin production. This discovery suggests that amyloid formation may serve a physiological role in cells, contradicting current views on pathogenic amyloids.
Researchers found that the pigment produced by cells in black-haired people has a thermodynamically unfavorable oxidation potential, while that of red-headed individuals is favorable. This difference may contribute to increased oxidative stress and skin cancer risk in redheads.