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Follicles in Biological News

Plastics chemical retards growth, function of adult reproductive cells

... it, also has been found to retard the growth of follicles of adult mice and hinder their production of ... student Jackye Peretz. "These are the only follicles that are capable of ovulating and so if they ... could be fertility issues," Flaws said. "These follicles also make sex steroid hormones, and so if they ...

December 2008 highlights from Biology of Reproduction

... of primordial oocytes, around which primordial follicles are forming. This key time in ovarian development establishes the population of oocytes and follicles and instigates evelopment of a cohort of follicles. If follicles fail to form, the result is oocyte demise, yet ...

UT Southwestern researchers identify hundreds of genes controlling female fertility

... primordial follicles. Later in development, the follicles become activated by a process that researchers ... which controls follicle activation. Normally, follicles are activated on a staggered schedule, so an ovary contains follicles at many different stages of development. In ...

Male cyclists risk sexual problems if they don’t choose the right bike

... the back of the scrotum and penis. "This area is sensitive, with hair follicles and sweat and sebaceous glands, which are all good breeding grounds for infection. "Abrasions, chafing, damaged hair follicles and bruising are among the most traumatic cycling injuries. Sweating in ...

Working to conserve endangered 'Playboy' bunnies

... with another marsh rabbit subspecies, Sylvilagus palustris paludicola, which is native to South Florida and the Everglades. She is using hair follicles gathered from mainland rabbits to extract DNA. Once sample collection is finished, Tursi will conduct DNA analysis and compare the diversities of ...

NAU discovery could help feed millions

... technology derived from Mayer's research, done by Patricia Hoyer and and Glenn Sipes at UofA, investigated potential damage caused to ovarian follicles in women exposed to certain chemicals in industrial settings. Of particular interest was a chemical compound known as 4-vinylcyclohexene diepoxide, ...

Feather color is more than skin deep

... ability to locate high quality resources. Recent studies have suggested that the transformation of carotenoid pigments takes place directly in the follicles during feather growth. Del Val and her team show for the first time that, contrary to previous assumptions, the liver acts as the main site for ...

No longer a gray area: Our hair bleaches itself as we grow older

... peroxide was caused by a reduction of an enzyme that breaks up hydrogen peroxide into water and oxygen (catalase). They also discovered that hair follicles could not repair the damage caused by the hydrogen peroxide because of low levels of enzymes that normally serve this function (MSR A and B). Further ...

When particles are so small that they seep right through skin

... lymph system, the liver, the nervous system, and in other areas of the body. In her study, she found that the particles accumulate around the hair follicles and in tiny skin folds. DeLouise, a chemist, points out that her study did not directly address the safety of nanoparticles in any way. "We simply ...

First demonstration of new hair follicle generation in an animal model

... School of Medicine have found that hair follicles in adult mice regenerate by re-awakening genes ... of injury. Unexpectedly, the regenerated hair follicles originated from non-hair-follicle stem cells. ... the normal structures of the skin, such as hair follicles and oil glands, rather than just a scar,?explains ...

New technology addresses female fertility preservation

... delay of treatment is not an option. Immature follicles (the female egg and surrounding somatic cells) ... culture system that encapsulates follicles and allows immature eggs to grow and mature in ... Tissue Engineering. The study shows that follicles grown individually in a three-dimensional ...

Israeli scientists successfully transplant frozen-thawed ovaries in sheep

... this technique[3]. However, adhesions and the loss of blood to the ovarian follicles that occurs during the interval before new blood vessels are being formed, ... technique worked ?the frozen-thawed ovaries produced comparable numbers of follicles as the fresh control ovaries. The next objective was to see if they ...

Human Eggs Can Develop From Ovarian Surface Cells In Vitro

... may originate from OSE cells and assemble together to form new primary follicles -- the structures that grow and rupture during ovulation to release mature ... may help women with reduced fertility and premature menopause, who lack follicles in their ovaries, to have a better chance of conceiving through in vitro ...

Hirsute Or Hairless? Two Proteins May Spell The Difference

... If you're a cat fancier, you're well aware that hair follicles are expendable. The product of a spontaneous mutation that caught a cat ... fundamental question in developmental biology. The dispensability of hair follicles makes them the perfect model system for studying this ...

MU researchers to study the status of black bears in Missouri

... remove a few of the bears’ hairs without harming the bears themselves. After collecting hair samples this summer, they will extract DNA from the hair follicles and use that DNA to estimate the number of bears, the gender ratio of male to female bears, where the bears are migrating from and if they are ...

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

... Stem Cells: The International Journal of Cell Differentiation and Proliferation. Epidermal neural crest stem cells are found in the bulge of hair follicles and have characteristics that combine some advantages of embryonic and adult stem cells, according to lead researcher, Maya Sieber-Blum, Ph.D., ...

Bedsores and bald hides: Novel roles revealed for a 'scaffolding' protein

... researchers, cells lacking K17 speed from growth to death faster than normal cells, preventing sufficient hair growth. When cells of normal hair follicles die, they follow a specific and genetically controlled death program. The team found that the K17 cytoskeleton protein is required to physically ...

A surprising pair of proteins help make healthy eggs

... describing the essential role a transcription factor called TAF4b plays in the fertility of female mice. Without this protein, egg-producing ovarian follicles didn't develop properly. The result: infertile mice. The new research underscores TAF4b's central role in normal reproduction. The Brown and ...

USC researchers track down the stem cells that create feathers

... cells were pluripotent-retaining the ability to differentiate into many different cell types-by taking the purported stem cells from quail-feather follicles and transplanting them into a chicken host. (Quail cells can be differentiated from chicken cells by cellular markers.) This demonstrated that only ...

First frozen egg baby born in Canada

... two years. Initially, she planned to undergo treatment with ovarian stimulation and intra-uterine insemination (IUI). Because she produced too many follicles in her ovaries, the treatment cycle had to be cancelled because of a high risk of multiple-fetal pregnancy. As an alternative treatment, she had eggs ...

Transport System Smuggles Medicines Into Brain

... bird's feathers and nowhere else in the body of the bird, indicating that parrots manufacture these molecules internally and directly at the maturing follicles of the growing, colorful plumage. In addition, these pigments may play a valuable role in maintaining the health of parrots. McGraw cites an ...

ASU researchers finds novel chemistry at work to provide parrot's vibrant red colors

... bird's feathers and nowhere else in the body of the bird, indicating that parrots manufacture these molecules internally and directly at the maturing follicles of the growing, colorful plumage. In addition, these pigments may play a valuable role in maintaining the health of parrots. McGraw cites an ...
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