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June 2019 in “eLife” Ancient DNA blocks are still present in human genomes, possibly due to advantages they provide.
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March 2004 in “Regulatory Toxicology and Pharmacology” Using testosterone-stimulated weanling rats can effectively replace castrated rats for anti-androgen testing, reducing animal stress.
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June 2013 in “In Vitro Cellular & Developmental Biology - Animal” Melanocytes from human fetal hair follicles were successfully cultured, showing potential for hair disease research and clinical use.
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January 2014 in “BMC Genomics” Cetaceans lost hair genes to adapt to water.
Finasteride significantly reduced sperm production and caused testicular atrophy in hamsters.
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February 2025 in “Proceedings of the National Academy of Sciences” Only Deomyinae rodents can regenerate complex tissues.
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August 2001 in “Experimental Dermatology” Human hair follicle cells can grow hair when put into mouse skin if they stay in contact with mouse cells.
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July 2007 in “Journal of comparative neurology” Manatee whiskers are specially adapted for touch in water.
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August 2015 in “Endocrinology” The antibody 005-C04 blocks prolactin receptors, causing reversible infertility, impaired lactation, and hair regrowth in female mice.
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May 2015 in “Addiction Biology” Prenatal stress changes how male and female rats enjoy rewards differently, linked to sex hormones.
December 2019 in “Ukrainian Journal of Veterinary and Agricultural Sciences” Donkey and horse hair have different microscopic structures, which can help tell them apart.
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Hairlessness in mammals is due to complex genetic changes in both genes and regulatory regions.
September 2025 in “American Journal of Dermatopathology” PRAME is often present in Paget disease and could help in diagnosis, but more research is needed.
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October 1996 in “Dermatologic clinics” Adiponectin reduces inflammation and bone loss in joint replacements.
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March 1998 in “Endocrinology” Male rats have more somatostatin neurons than females due to testosterone converting to estrogen during early development.
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March 2021 in “Journal of animal science/Journal of animal science ... and ASAS reference compendium” Blocking prolactin increases the activity of secondary hair follicles in cashmere goats.
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October 1992 in “PubMed” WHV infection does not affect woodchuck skin anatomy.
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March 2021 in “bioRxiv (Cold Spring Harbor Laboratory)” Hairless mammals have genetic changes in both their protein-coding and regulatory sequences related to hair.