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Different animals have unique versions of the enzyme that changes testosterone into another hormone, which is important for creating effective treatments for prostate and hair loss conditions.

Pigs without the Hairless gene showed skin and thymus changes, useful for studying human hair disorders.

Human hair keratin genes have unique simple sequence repeats that may help track genetic variations.

Monkey lips have dense sensory nerves similar to those in other skin areas, explaining their sensitivity.

Humans have ancient DNA from Neanderthals and other lineages in their chromosomes, affecting traits and evolution.

Mouse nails are similar to human nails, making them useful for studying nail diseases.

Neotropical porcupines can get co-infected with poxvirus and Toxoplasma gondii.

Monotreme and marsupial skin proteins show primitive features and species-specific differences compared to placental mammals.

Testosterone can slow hair growth in adult monkeys, but a blocker called RU 58841 can counteract this and potentially help hair regrow.

Biotin deficiency in monkeys causes fur and skin issues, but 20 μg of biotin daily can prevent or cure it.

Humans, especially vulnerable groups, can catch skin infections from small mammals.

Muridae species have unique hair patterns specific to each genus and species.

Finasteride slows down motherly behavior in first-time pregnant rats.

RU58841, an androgen receptor blocker, significantly increased hair density, thickness, and length in monkeys when applied topically daily for several months.

Trichoblastomas in aged house musk shrews show unique features and may involve serum amyloid A in inflammation.

Hairlessness in mammals is caused by combined changes in genes and regulatory regions.

Researchers successfully used nude mice to study human hair growth, which could help with future hair research.

The ND1 gene of the Asian black bear Sichuan subspecies is similar to other bear species.

The created skin model with melanoblasts improves the study of skin color and offers an alternative to animal testing.

The procedure reliably measures cortisol in rhesus macaque hair.

All adults have Demodex mites, which vary by region.

Bats in Puebla, Mexico, show hair loss likely due to environmental stress from human activities.

Hair can reliably measure average estradiol levels over months in humans and monkeys.

The lemur's testicular tumor was removed, improving its coat and behavior, with no signs of cancer spread.

90% of African pygmy hedgehogs in the study had fungal infections.

Gonadal hormones may influence sex differences in play fighting in animals, but their effect on human spatial behavior is unclear and needs more research.

Hormonal changes during the reproductive cycle may cause seasonal skin problems in captive female fossas.

Researchers mapped and categorized specific keratin-associated protein genes on human chromosome 21q22.1.