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Planarian regeneration begins with a specific gene activation caused by injury, essential for healing and tissue regrowth.

Stem cell niches are crucial for regulating stem cell renewal and differentiation, and understanding them can help in developing regenerative therapies.

Hair and wool have complex microscopic structures with microfibrils and varying cystine content.

Finasteride effectively treats frontal hair loss with few side effects.

Finasteride treats enlarged prostate and may help with baldness, but effects on sexual function and male fetuses are unclear.

Skin cells produce and activate vitamin D, which regulates skin functions and supports hair growth.

Researchers created human hair follicles using a new method that could help treat hair loss.

The 2003 guidelines suggest that while some treatments can regrow hair in alopecia areata, none alter the disease's progression, and wigs may be the best option for extensive hair loss.

Regenerated fully functional hair follicles using stem cells, with potential for hair regrowth therapy.

Hair loss in men is common, treatable, but not curable.

Bone Morphogenetic Proteins (BMPs) help control skin health, hair growth, and color, and could potentially be used to treat skin and hair disorders.

Capsaicin, found in chili peppers, can slow down hair growth by affecting skin cells and hair follicles.

Radiation therapy with a higher dose for the brain improves survival in cerebellar medulloblastoma.

Some people with pattern hair loss may also have scalp inflammation and scarring similar to lichen planopilaris.

Early diagnosis and individualized treatment improve outcomes for Congenital Adrenal Hyperplasia.

Methotrexate treats various disorders by inhibiting DNA synthesis, but careful monitoring is needed to avoid toxicity and manage side effects.

New research suggests that skin cell renewal may not require a special type of cell previously thought to be essential.

Humans lost body hair relatively recently in evolution.

Skin aging is due to impaired stem cell mobilization or fewer responsive stem cells.

Different types of stem cells and their environments are key to skin repair and maintenance.

Modulating BMP activity changes the number, size, shape, and type of ectodermal organs.

Mouse hair follicle cells briefly grow during the early hair growth phase, showing that these cells are important for starting the hair cycle.

Different types of stem cells exist within individual skin layers, and they can adapt to damage, transplantation, or tumor growth. These cells are regulated by their environment and genetic factors. Tumor growth is driven by expanding, genetically altered cells, not long-lived mutant stem cells. There's evidence of cancer stem cells in skin tumors. Other cells, bacteria, and genetic factors help maintain balance and contribute to disease progression. A method for growing mini organs from single cells has been developed.

Low doses of some substances can be beneficial, while high doses can be harmful or toxic.

Targeting androgen receptors could be a promising way to treat skin disorders with fewer side effects.

IL-2 treatment causes skin eruptions and other reversible side effects, and may play a role in psoriasis.

Children, especially teenagers, can get severe SARS-CoV infection with symptoms similar to adults, but they typically recover well with supportive care.

Finasteride may cause long-lasting sexual side effects.

The document concludes that understanding the sebaceous gland's development and function is key to addressing related skin diseases and aging effects.

A specific drug can help treat Lichen Planopilaris, a condition causing permanent hair loss.