- Alpha 6 positive cells constitute the entire population of basal or proliferative keratinocytes from the interfollicular epidermis and hair follicle. Both BIB and Bulge cells are contained within the total population of alpha 6 positive cells.
- BIB cells reside in the hair follicle in a region between the infundibulum and bulge and these cells are characterized by low alpha 6 integrin surface levels and are negative for CD34 and Sca-1 surface proteins.
- Bulge cells are derived from the bulge region of the hair follicle and are characterized by low + high alpha 6 integrin surface levels and are positive for CD34 but negative for Sca-1.
INSTRUMENT(S): 418 [Affymetrix]
ORGANISM(S): Mus musculus
SUBMITTER: David M Owens Charlotte Triel Xiaohong Yan Uffe B Jensen
Journal of cell science 20080205 Pt 5
The bulge region of adult murine hair follicles harbors epidermal stem cells with multipotent capacity; however, the restricted contributions of these cells under homeostatic conditions indicates that additional stem or progenitor cell populations may be required to maintain squamous and sebaceous lineages. We have identified a distinct population of murine hair follicle keratinocytes residing in the upper isthmus (UI) between the infundibulum and bulge regions that are distinguished by low alph ...[more]