Sentences with phrase «human hair follicles»

Human hair follicles maintain the natural hair colour by making pigment called melanin.

Additionally, researchers looked at the effects of PGD2 and 15 - dPGJ2 on human hair follicles.

The group recently produced data showing that stem cells from human hair follicles also differentiate into contractile smooth muscle cells.

They also studied aging human hair follicles.

In experiments with mouse and human hair follicles, Angela M. Christiano, PhD, and colleagues found that drugs that inhibit the Janus kinase (JAK) family of enzymes promote rapid and robust hair growth when directly applied to the skin.

Dr. Michelle Trautwein, Academy curator of entomology and senior author of the new findings, says improving the understanding of the mites that live in human hair follicles helps shed light on human evolution and may allow scientists to pinpoint mites» role in human health.

The source of new hair: For the first time, researchers have been able to take human dermal papilla cells (those inside the base of human hair follicles) and use them to create new hairs.

The paper is titled, «Microenvironmental reprogramming by three - dimensional culture enables dermal papilla cells to induce de novo human hair follicle growth.»

Not exact matches

«The nakedness of humans is a glaring difference between humans and other mammals,» says evolutionary biologist Mark Pagel of the University of Reading, U.K.. Although humans have about as many follicles as other primates, the hairs are fine, exposing the skin and creating an evolutionary enigma.

Further study showed that the region of human DNA that contained the single nucleotide change associated with blondness specifically affected the expression of KITLG only in hair follicles.

Still, by identifying the human hairless gene as an important master switch in regulating cell death in a hair follicle — a discovery that could lead to gene therapies for unwanted hair growth — Christiano emerged as a new star in the field, and a glamorous one.

«By analyzing mice with the WNT10A mutation, as well as tissues from human patients with WNT10A mutations, we found that WNT10A regulates the proliferation, but not the maintenance, of stem cells in hair follicles,» said Sarah Millar, PhD, vice chair for Basic Research in the Department of Dermatology.

Demodex mites (family Demodicoidea) are parasites that live in or near the hair follicles of mammals, including humans.

«The PRSS53 enzyme functions in the part of the hair follicle that shapes the growing hair fiber, and this new genetic variation, associated with straight hair in East Asians and Native Americans, supports the view that hair shape is a recent selection in the human family.»

Study demonstrates that mice can regrow hair follicles at wound sites; the finding could lead to treatment for human hair loss

It's likely that the drugs that are so effective in enhancing hair growth in the mice could affect the same pathways in human follicles, suggesting they could induce new hair growth and extend the growth of existing hairs in humans.

The epithelial stem cells, when implanted into immunocompromised mice, regenerated the different cell types of human skin and hair follicles, and even produced structurally recognizable hair shaft, raising the possibility that they may eventually enable hair regeneration in people.

Hair follicles are larger than regular pores, and the average human head has about 10,000 hair follicHair follicles are larger than regular pores, and the average human head has about 10,000 hair follichair follicles.

According to David Stern, vice president of marketing for Metro Dryers, too - hot human hairdryers dry hair or fur from the top down to the scalp, causing the coat to become brittle, while the super powerful airflow of high velocity dryers dries from the base of the follicle to the top of the hair or fur for quick and thorough drying.

Chinchillas also have 50 or more hairs per follicle as opposed to humans, who only have one.

First described in 1842 by Gustav Simon, a French dermatologist, Demodex mites are normal skin inhabitants of many mammals, and > 140 species of Demodex have been identified (2 in humans, 3 in dogs).1 The mites live in hair follicles as well as the sebaceous glands and ducts and feed off of sebum, cells, and debris from the epidermis.2, 3 In dogs, the mites are passed from the bitch to her puppies through close contact while nursing.

Unlike the hair follicles in humans that grow as individual hair, the hair follicles in canines typically grow in clusters, providing ample protection for the skin beneath it.

They pretty much look like whiteheads and blackheads that humans suffer from when their hair follicles get clogged.

Unlike humans who have one of a few hairs growing in each follicle, most dogs and cats have many hairs in each follicle.

Unlike humans, which have a single hair in each follicle, dogs have several hairs growing from each follicle: usually a guard hair (thicker, longer, stiffer hairs that grow through, protect and conceal the undercoat) and several secondary hairs, or undercoat.

Researchers in the Perelman School of Medicine at the University of Pennsylvaniahave determined the role of a key growth factor, found in skin cells of limited quantities in humans, which helps hair follicles form and regenerate during the wound healing process.

(2013) Growth Factor Responsible for Triggering Hair Follicle Generation During Wound Healing Identified, Found in Cells of Short Supply in Humans.