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Tag: "follicle" at biology news

Scientists discover the cellular roots of graying hair

...iated, pigmented melanocytes wereshowing up in the follicle at the location where the stem cellsresided. Since they were in the wrong place, the pigmented cells likelydid nothing to maintain the mice’s hair color.To see if the cells behaved the same way in humans, the investigatorsexamined human scalp tissue ...

Fundamental Finding Yields Insight into Stem Cells, Cancer; Opens Door to Drug Discovery

...iated, pigmented melanocytes wereshowing up in the follicle at the location where the stem cellsresided. Since they were in the wrong place, the pigmented cells likelydid nothing to maintain the mice’s hair color.To see if the cells behaved the same way in humans, the investigatorsexamined human scalp tissue ...

Weizmann Institute scientists develop a new approach for directing treatment to metastasized prostate cancer in the bones.

...iated, pigmented melanocytes wereshowing up in the follicle at the location where the stem cellsresided. Since they were in the wrong place, the pigmented cells likelydid nothing to maintain the mice’s hair color.To see if the cells behaved the same way in humans, the investigatorsexamined human scalp tissue ...

U-M scientists find genes that control growth of common skin cancer

...lti-lineagedifferentiation, similar to normal hair follicle stem cells from whichthey may arise.If the results of this study are applicable to human BCC, the discoveryof residual tumor cells and tumor recurrence may be particularlyimportant given the current efforts to develop Hh pathway inhibitors asa means ...

Hirsute Or Hairless? Two Proteins May Spell The Difference

...n development, a mechanistic understanding of hair follicle development promises to shed light on how skin cancer develops as well. ...

Mother birds increase progesterone to hatch females

...us, we think that how much progesterone the female follicle produces during the first meiosis is the mechanism in birds that manipulates the sex ratio of offspring," says Adkins-Regan. "Researchers think that birds such as the Seychelles warbler may bias the sex of their offspring when, for example, their te...

Human embryonic stem cells have the potential to develop into eggs and sperm in the laboratory

...e cultured cells the environment of the developing follicle for egg development or the tissue of the testis for sperm. We want to test whether HESCs can differentiate to cells that produce the hormones for sperm and egg development and isolate these as well. What is extraordinary is that the embryoid bodies s...

USC researchers track down the stem cells that create feathers

...ied epithelial stem cells within a chicken-feather follicle by giving the chickens water containing a non-radi...ts, the quill of the feather is dislodged from the follicle with a tapered proximal opening-the very feature that has historically made feathers so useful as wr...

New brain hormone puts brakes on reproduction

...the hormones gonadotropin, luteinizing hormone and follicle stimulating hormone. These hormones are dumped into the bloodstream and make their way to the gonads, where in males they stimulate production of testosterone and the maturation of sperm. In females, the hormones stimulate production of estradiol, a...

Component in soy products causes reproductive problems in laboratory mice

...aper. "Since there are many egg cells in the same follicle instead of just one, the resources from the surrounding cells are spread too thin and they can't get the support they need to become a mature functioning egg cell." "You need at least one good healthy single oocyte that is ovulated and fertilized by...

Study finds how organs monitor themselves during early development

...rows," she says. In the human ovary for example, a follicle ripens every month. Without the somatic cells of the ovary, the egg on its own would not ripen. The eggs need this environment for their development, she says. In every organism, both egg and sperm cells cannot develop unless they are embedded in ...

Study finds that a woman's chances of having twins can be modified by diet

...k. IGF increases the sensitivity of the ovaries to follicle stimulating hormone, thereby increasing ovulation. Some studies also suggest that IGF may help embryos survive in the early stages of development. The concentration of IGF in the blood is about 13 percent lower in vegan women than in women who consum...

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

...ferent role for the same protein in promoting hair follicle growth, although the investigators were quick to c...minimal scarring." K17's role in maintaining hair follicle strength is probably centered on its capacity to control the timing of follicle cell death during no...

New technology addresses female fertility preservation

...lows immature eggs to grow and mature in vitro. (A follicle is a small spherical group of specialized support ...alled alginate maintain normal connections between follicle and egg, resulting in the development of eggs, which can be fertilized and ultimately lead to health...

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

...cle cells. The cells can be isolated from the hair follicle bulge as multipotent stem cells, and then expanded in culture into millions of cells without losing stem cell markers. "We grafted the cells into mice that have spinal cord injuries and were encouraged by the results. The cells survived and integr...

Robotic whiskers can sense three-dimensional environment

...many thousands of sensory receptors located in the follicle at the whisker base. The receptors, in turn, send neural signals to the brain, where a three-dimensional image is presumably generated. Hartmann and Solomon showed that their robotic whiskers could extract information about object shape by "whiski...

Researchers identify a key regulator for skin stem cells

...or Tcf3 is activated in a region of the adult hair follicle called the bulge, where stem cells are expected to...ned that if Tcf3 plays a role in maintaining adult follicle cells, it would also be present in embryonic skin, which consists mainly of stem cells. When they an...

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