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research Panax ginseng prevents apoptosis in hair follicles and accelerates recovery of hair medullary cells in irradiated mice.

22 citations , September 1998 in “PubMed”

This study found that the water fraction of Panax ginseng may reduce apoptosis and enhance medullary cell formation in the hair follicles of irradiated mice, suggesting a potential protective effect.

research Vitamin D activates type A natriuretic peptide receptor gene transcription in inner medullary collecting duct cells

17 citations , April 2007 in “Kidney international”

This study found that 1,25 dihydroxyvitamin D3 significantly increased the expression and activity of vasculoprotective natriuretic peptide receptor-A in cultured inner medullary collecting duct cells, suggesting a potential mechanistic role in cardiovascular and renal benefits.

Ultrastructural Immunolocalization of Involucrin in the Medulla and Inner Root Sheath of Human Hair

research Ultrastructural immunolocalization of involucrin in the medulla and inner root sheath of the human hair

7 citations , December 2011 in “Annals of anatomy”

This study found that involucrin likely plays a key role in forming the cornified material of the medulla and inner root sheath of human hair, contributing to its mechanical strength.

research [Contribution to hair medulla study (author's transl)].

4 citations , January 1981 in “PubMed”

This study found that medullary cell content in mammal hair evolves from an amorphous form to a biphasic phase, with human and anthropoid hair containing both macrofibrils and microfibrils.