The bulb is composed of rapidly proliferating matrix cells that generate the hair shaft.
Therefore, cells generate extracellular matrix (ECM), which facilitates their adherence to a surface and influences their behaviour, such as orientation, proliferation, migration and differentiation [1, 2].
This niche is mainly composed of the extracellular matrix adhesion molecules, local cell populations and the secreted and cell-surface-bound molecules that these cells generate.
Although the tumour cells generated an extracellular matrix with measurable collagen and GAG content when grown in vitro as multicellular spheroids, no difference among the three clones grown as spheroids was found with respect to collagen content or GAG content (total GAG, HA, s-GAG).
However, injection of CD44+ALDHhi cells generated metastases.
The second is that the HF stem cells may continuously generate new matrix cells, with the production of hair fibres ceasing at a preprogrammed point that depends on many factors including the environment, follicle type, age, sex, and species [ 18].
A Boolean matrix with pathways in rows and datasets in columns was generated, where matrix cells equal to 1 identified significant enrichment of a given pathway in a given dataset, and 0 otherwise [ 21, 22].
With great success in short or intermediate term cell therapy, alginate is the most commonly used polymer matrix to generate cell-laden microcapsules (Zimmermann et al., 2007).
This pacing would have generated a burst mode activity of MDTN matrix cells which in turn would have promoted a widespread cortical delta-theta activity instead of the expected alpha.
The rationale for the first hypothesis is that the proliferative capacity of matrix cells is determined at the initiation of a new hair cycle and that new matrix cells are not generated throughout the entire growth phase.
