Exogenous thyroid hormone affects myoepithelium
and proliferation in the developing rat parotid gland.
This additional staining supports the findings that these structures are made partly of a myoepithelium
(Hyman, 1955; Byrne, 1994).
Moreover, due to fact that muscles posses plentiful of common factors with mammary epithelial and myoepithelial stem cells and therefore we believe that these cells could also pave a way to search regenerative possibilities of mammary epithelium and myoepithelium
with muscle cells .
The secretory portion was made up of glandular tubules, myoepithelium
, and basement membrane.
Given the current results showing that only myoepithelial cells were [alpha]-SMA positive in the isolated SGs, the [alpha]-SMA positive cells could only be derived from ahSG myoepithelium
Nonexistence of the myoepithelium
layer and the muscle and adipose tissue invasion of the tumor in its periphery are important for the diagnosis (2).
Immunohistochemical (IHC) staining showed positive for cluster of differentiation 34, B-cell lymphoma 2, vimentin and smooth muscle actin, myoepithelium
, negative for epithelial membrane antigen, and S-100; the Ki-67 index was less than 1%.
Depending on the degree of epithelium present, the myoepithelium
may be variably prominent but is uniformly present, both at the periphery and within the papillae.
Near the pigmented epithelium the presence of a myoepithelium
, with basal processes radially arranged including melanin granules, more apparent in tawny owl and in barn owl (Fig.
The avian iris musculature is composed mainly of striated muscle fibers with variable amounts of nonstriated muscle fibers (myoepithelium
and/or smooth muscle).
The isolated breast-milk-derived cells were adherent to the plates and their morphology was similar to the cells of myoepithelium
of the breast (Figure 1).
Oxytocin has an affinity to oxytocin receptors which are expressed in the uterus during labour, the myoepithelium
of the breasts during lactation (milk let down), and also on neurones within the central nervous system (Leng et al., 2008).