Comparative Anatomy of Mouse and Human Nail Units

February 2013 in “ The Anatomical Record ”

Philip Fleckman, Karin Jaeger, Kathleen A. Silva, John P. Sundberg

keratin KRT17 KRT14 onychomycosis nail disorders nail units C57BL/6J mouse strain

Studysummary This study found that the mouse nail unit structurally resembles the human nail unit, indicating it could be useful for researching nail diseases and biology.

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Research cited in this study

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research Keratin Expression Provides Novel Insight Into the Morphogenesis and Function of the Companion Layer in Hair Follicles

38 citations , December 2006 in “Journal of Investigative Dermatology”

Keratin patterns in hair follicles help understand hair growth and potential hair and nail disorders.

research FOXN1 Is Critical for Onycholemmal Terminal Differentiation in Nude (Foxn1nu) Mice

58 citations , November 2004 in “The journal of investigative dermatology/Journal of investigative dermatology”

This study found that mutations in the Foxn1 gene in nude mice affect not only hair but also nail structure and differentiation, offering insights into nail hypergranulosis pathogenesis relevant to human nail diseases.

research Expression of Hair Keratins in the Adult Nail Unit: An Immunohistochemical Analysis of Onychogenesis in the Proximal Nail Fold, Matrix, and Nail Bed

110 citations , August 2004 in “British Journal of Dermatology”

In this study, researchers identified the ventral matrix as the primary source of nail plate formation, while the dorsal portion is generated by the apical matrix.

research A Novel Mouse Type I Intermediate Filament Gene, Keratin 17n, Exhibits Preferred Expression in Nail Tissue

31 citations , April 2004 in “Journal of Investigative Dermatology”

This study found that a newly identified gene, mK17n, may explain the lack of nail issues in mK17 null mice by compensating for mK17's function in the nail bed.

research Type II Epithelial Keratin 6hf (K6hf) Is Expressed in the Companion Layer, Matrix, and Medulla in Anagen-Stage Hair Follicles

60 citations , December 2003 in “Journal of Investigative Dermatology”

This study found that keratin 6hf, a type II keratin, is expressed in specific regions of mouse and human hair and suggests potential interactions with keratin 17, impacting hair development and associated disorders.

research Discovery of a Novel Murine Keratin 6 (K6) Isoform Explains the Absence of Hair and Nail Defects in Mice Deficient for K6a and K6b

101 citations , August 2001 in “The Journal of Cell Biology”

This study found that while most mice lacking MK6a and MK6b genes died from tongue epithelium disintegration, about 25% survived and showed no hair or nail defects due to a newly discovered MK6hf gene.

research Dermatological Manifestations of Down's Syndrome

28 citations , August 2001 in “Journal of cutaneous medicine and surgery”

This review discusses the increased incidence of dermatological conditions in individuals with Down's syndrome and explores potential links to immunological deficiencies, but reports no new clinical findings.

research Keratin 17 Expression in the Hard Epithelial Context of the Hair and Nail, and Its Relevance for the Pachyonychia Congenita Phenotype

88 citations , June 2000 in “Journal of Investigative Dermatology”

Keratin 17 is important for hair and nail structure and affects pachyonychia congenita symptoms.

research Keratin Expression in the Normal Nail Unit: Markers of Regional Differentiation

119 citations , January 2000 in “British Journal of Dermatology”

This study found that keratin expression patterns vary within nail unit structures, with the nail matrix uniquely expressing the acidic hair-type keratin Ha1.

research Onset of Keratin 17 Expression Coincides with the Definition of Major Epithelial Lineages During Skin Development

318 citations , October 1998 in “The Journal of Cell Biology”

This study found that ectopic expression of the lymphoid-enhancer factor can induce K17 protein in the skin, suggesting a link between skin development and wound repair processes in mice.

Acidic and Basic Hair/Nail (Hard) Keratins: Their Colocalization in Upper Cortical and Cuticle Cells of the Human Hair Follicle and Their Relationship to Soft Keratins

research Acidic and Basic Hair/Nail (Hard) Keratins: Their Colocalization in Upper Cortical and Cuticle Cells of the Human Hair Follicle and Their Relationship to Soft Keratins

356 citations , December 1986 in “The journal of cell biology/The Journal of cell biology”

This study found that specific human hair keratins are differentially expressed in the hair follicle, suggesting a shared pathway of epithelial differentiation between hair cortex and nail plate cells.