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Mice can grow new hair follicles after skin wounds through a process not involving existing hair stem cells, but requiring more research to understand fully.

Immune cells help regulate hair growth, and better understanding this can improve hair loss treatments.

Nerves are crucial for the regeneration of various body parts in many animals.

Mice that can regenerate tissue have cells that pause in the cell cycle, which is important for healing, similar to axolotls.

The immune system plays a key role in tissue repair, affecting both healing quality and regenerative ability.

MRL/MpJ mice's skin wounds heal with scars, unlike their ear wounds which can regenerate.

Scientists have found a way to create hair follicles from skin cells of newborn mice, which can grow and cycle naturally when injected into adult mouse skin.

Mice can regenerate ear tissue without the p53 protein.

Radiation significantly slows down wound healing in mice.

Young C57BL/6 mice heal better than BALB/c mice, and older mice heal faster but regenerate worse.

Certain genes are more active during wound healing in axolotl and Acomys, which could help develop materials that improve human wound healing and regeneration.

Lizards can regrow their tails, and studying this process helps understand scar-free healing and limb regeneration.

High levels of ERK activity are key for tissue regeneration in spiny mice, and activating ERK can potentially redirect scar-forming healing towards regenerative healing in mammals.

BMP2 needs periosteal tissue to help regenerate mouse middle finger bones within a specific time.

Mammals might fail to regenerate not because they lack the right cells, but because of how cells respond to their surroundings, and changing this environment could enhance regeneration.

Artificial skin development has challenges, but new materials and understanding cell behavior could improve tissue repair. Also, certain growth factors and hydrogel technology show promise for advanced skin replacement therapies.

Organs like hair follicles can renew themselves in complex ways, adapting to different needs and environments.

The document concludes that while some organisms can regenerate body parts, mammals generally cannot, and cancer progression is complex, involving mutations rather than a strict stem cell hierarchy.

Lung repair involves both dedicated and flexible stem cells, important for developing new treatments.

Nail stem cells and Wnt signaling are important for fingertip regeneration but not sufficient for regenerating more complex limb structures.

Stromal stem cells may help heal wounds by becoming structural cells or affecting the immune system, but more research is needed to understand how.

Activating the GDNF-GFRα1-RET signaling pathway could potentially promote skin and limb regeneration in humans and could be used to treat hair loss and promote wound healing.

Msx and Dlx genes are crucial for development, controlling cell behaviors like growth and differentiation through their roles as gene regulators.

Cancer can hijack the body's cell repair system to promote tumor growth, and targeting this process may improve cancer treatments.

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

Humans have limited regenerative abilities, but new evidence shows the adult brain and heart can regenerate, and future treatments may improve this by mimicking stem cell environments.

The document concludes that understanding hair and feather regeneration can help develop new regenerative medicine strategies.

African spiny mice can regenerate skin, hair, and cartilage, but not muscle, and their unique abilities could be useful for regenerative medicine.

Noncoding dsRNA boosts hair growth by activating TLR3 and increasing retinoic acid.

Delayed ejaculation is a complex issue caused by psychological, biological, and lifestyle factors, requiring a holistic treatment approach.