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Glossaryp21 (CIP1)

protein that inhibits cell cycle progression for DNA repair

p21 is a protein that acts as a regulator of the cell cycle. It is known for its role in inhibiting the activity of cyclin-dependent kinases (CDKs), which are crucial for cell division. By doing so, p21 can halt the cell cycle, allowing for DNA repair or triggering cell death if the damage is irreparable. This function is particularly important in preventing the proliferation of damaged cells, which can lead to cancer.

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P21Waf1/Cip1 Is Differentially Expressed in Epidermal Versus Follicular Melanocytes and Melanoma Cells and Is Phenotypically Regulated by UVB-Mediated Apoptosis

research P21Waf1/Cip1 Is Differentially Expressed in Epidermal Versus Follicular Melanocytes and Melanoma Cells and Is Phenotypically Regulated by UVB-Mediated Apoptosis

April 2023 in “The journal of investigative dermatology/Journal of investigative dermatology”

The protein p21 is more abundant in normal skin cells than in melanoma cells and may help protect against melanoma, with UVB light affecting its levels.

research HIF-2α/ARNT Complex Regulates Hair Development via Induction of p21 Waf1/Cip1 and p27 Kip1

4 citations, March 2014 in “The FASEB Journal”

The HIF-2α/ARNT complex is important for hair follicle development by controlling cell growth.

research Effect of Lithocholic Acid as a Ligand of Vitamin D Receptor on Hair Growth in Alopecia

April 2016 in “Journal of Investigative Dermatology”

Lithocholic acid helps hair growth and regeneration in alopecia by activating vitamin D receptors.

Cyclosporin A-Induced Hair Growth in Mice Is Associated with Inhibition of Calcineurin-Dependent Activation of NFAT in Follicular Keratinocytes

research Cyclosporin A-Induced Hair Growth in Mice Is Associated with Inhibition of Calcineurin-Dependent Activation of NFAT in Follicular Keratinocytes

57 citations, June 2003 in “American Journal of Physiology-cell Physiology”

Cyclosporin A helps mice grow hair by blocking a specific protein activity in skin cells.

research Re-Evaluating Cyclosporine A as a Hair Growth–Promoting Agent in Human Scalp Hair Follicles

29 citations, March 2015 in “Journal of Investigative Dermatology”

Cyclosporine A promotes hair growth and prolongs the active growth phase in human hair follicles, but may work differently than in rodents.

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