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. 1987 Apr;84(8):2302–2306. doi: 10.1073/pnas.84.8.2302

Three clonal types of keratinocyte with different capacities for multiplication.

Y Barrandon, H Green
PMCID: PMC304638  PMID: 2436229

Abstract

Colony-forming human epidermal cells are heterogeneous in their capacity for sustained growth. Once a clone has been derived from a single cell, its growth potential can be estimated from the colony types resulting from a single plating, and the clone can be assigned to one of three classes. The holoclone has the greatest reproductive capacity: under standard conditions, fewer than 5% of the colonies formed by the cells of a holoclone abort and terminally differentiate. The paraclone contains exclusively cells with a short replicative lifespan (not more than 15 cell generations), after which they uniformly abort and terminally differentiate. The third type of clone, the meroclone, contains a mixture of cells of different growth potential and is a transitional stage between the holoclone and the paraclone. The incidence of the different clonal types is affected by aging, since cells originating from the epidermis of older donors give rise to a lower proportion of holoclones and a higher proportion of paraclones.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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