Immunohistochemical analysis of tissue remodelling during the anagen-catagen transition of the human hair follicle.
The transition from the growth phase (anagen) to the involution phase (catagen) involves profound morphological changes in the human hair follicle. Club hair and epithelial column formation, for example, are key features of the catagen phase, which result in the disruption of physical interaction between the bulb and the dermal papilla. However, the dynamics and tissue remodelling that occur during this involution process remain largely unknown. Using monoclonal antibodies directed against K14 keratin, trichohyalin, transglutaminase I, desmoglein and Ki67 antigen, we followed the movements of each of the main hair follicle compartments during the onset of catagen. Our results indicate that the inner root sheath is an early target in this process, suggesting a key role for this compartment in the maintenance of hair follicle homeostasis.
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L'OREAL, C.Zviak Research Center, Hair Biology Research Group, Clichy, France.
Bernard
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BA
D015415:Biomarkers / Q000032:analysis; D015815:Cell Adhesion Molecules / Q000032:analysis / Q000378:metabolism; D003598:Cytoskeletal Proteins / Q000032:analysis / Q000378:metabolism; D051182:Desmogleins; D051180:Desmoplakins; D006197:Hair / Q000254:growth & development* / Q000378:metabolism; D018859:Hair Follicle / Q000254:growth & development* / Q000378:metabolism; D006706:Homeostasis; D006801:Humans; D007150:Immunohistochemistry; D007381:Intermediate Filament Proteins; D007633:Keratins / Q000378:metabolism; D019394:Ki-67 Antigen / Q000032:analysis / Q000378:metabolism; D011498:Protein Precursors / Q000032:analysis / Q000378:metabolism; D011503:Transglutaminases / Q000032:analysis / Q000378:metabolism
D015415:Biomarkers; D015815:Cell Adhesion Molecules; D003598:Cytoskeletal Proteins; D051182:Desmogleins; D051180:Desmoplakins; D007381:Intermediate Filament Proteins; D019394:Ki-67 Antigen; D011498:Protein Precursors; C016159:trichohyalin; D007633:Keratins; D011503:Transglutaminases