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The human scalp hair bulb contains different types of melanocytes with varying abilities to produce melanin.

Sex hormones may influence COVID-19 severity, with males at higher risk, and certain hormone therapies could potentially treat the virus.

Hydrogels combined with extracellular vesicles and 3D bioprinting improve wound healing.

Combination pharmacotherapy is generally more effective for treating keloids and hypertrophic scars.

Nanotechnology shows promise for better chronic wound healing but needs more research.

Microneedles are effective for painless drug delivery and promoting wound healing and tissue regeneration.

3D bioprinting in plastic surgery could lead to personalized grafts and fewer complications.

Electrospun 3D nanofibrous materials show promise for bone regeneration in orthopaedics.

High doses of testosterone disrupt hormone levels and receptor expression in the uterus, affecting fertility.

KGF and its receptor are found in enlarged prostate tissue and KGF strongly increases cell growth.

Adipose-derived stem cells show potential for skin rejuvenation and wound healing but require more research to overcome challenges and ensure safety.

New findings suggest targeting IL-23 could treat psoriasis, skin cells can adapt to new roles, direct conversion of skin cells to blood cells may aid cell therapy, removing certain tumor cells could boost cancer immunotherapy, and melanoma may have many tumorigenic cells, not just cancer stem cells.

The mesenchymal stem cell-conditioned medium gel improved burn healing and hair growth in rats better than other treatments.

HSPGs help control stem cell behavior, affecting hair growth and offering a target for hair loss treatments.

Stem cell therapies could be a promising alternative for hair loss treatment, but more research is needed to understand their full potential and safety.

Advanced therapies like gene, cell, and tissue engineering show promise for hair regrowth in alopecia, but their safety and effectiveness need more verification.

Bone marrow and umbilical cord stem cells can help grow new hair.

The article concludes that PRP might help with hair loss, but more detailed research is necessary.

Mesenchymal stem cells show promise for effective skin repair and regeneration.

Fat-derived stem cells may help treat skin aging and hair loss.

New materials and methods could improve skin healing and reduce scarring.

Fat-derived stem cells and their secretions show promise for treating skin aging and hair loss.

Stem cells, especially from fat tissue and Wharton's jelly, can potentially regenerate hair follicles and treat hair loss, but more research is needed to perfect the treatment.

The review concludes that innovations in regenerative medicine, tissue engineering, and developmental biology are essential for effective tissue repair and organ transplants.

Skin health and repair depend on the signals between skin stem cells and their surrounding cells.

Mesenchymal stem cells could help treat radiation-induced bladder damage but more research is needed to overcome current limitations.

The skin's dermal layer contains true stem cells with diverse functions and interactions that need more research to fully understand.

Stem cell plasticity is crucial for wound healing but can also contribute to cancer development.

Androgens can cause hair growth in some areas and hair loss on the scalp.

The skin's basement membrane has specialized structures and molecules for different tissue interactions, important for hair growth and attachment.