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Mesoangiobasts are blood vessel-derived stem cells that differentiate into smooth, skeletal, and cardiac muscle cells. We have reported that postnatal aorta-derived mesoangioblasts (ADM) regenerate skeletal muscle and prevent onset of dilated cardiomyopathy in animal models of Duchenne muscular dystrophy. ADM also differentiate into myelinating glial cells, suggesting they are multipotent and capable of generating mesodermal or ectodermal derivatives. Mesenchyme of some fetal organs is a potent instructive inducer. Here we examined whether ADM can differentiate into prostatic, uterine, and skin epithelium by recombining ADM with fetal or neonatal mesenchyme from these organs and grafting them under the renal capsule of syngeneic hosts. In tissue recombinants of uterine mesenchyme (UtM) and ADM, ADM formed histologically normal simple columnar uterine epithelium that expressed estrogen receptor 1 and in response to estrogen showed increased mitogenesis and downregulation of progesterone receptor. In contrast, ADM did not differentiate into prostatic epithelium or epidermis when recombined with urogenital sinus mesenchyme or fetal dermis, respectively. These results indicate that ADM can respond to cues from neonatal UtM and differentiate into morphologically and functionally normal uterine epithelial cells, and support previous reports that ADM can differentiate into a variety of tissues of the mesodermal lineage. However, these data indicate that ADM are restricted in their capacity to differentiate into endodermal and ectodermal derivatives such as prostatic and skin epithelial cells, respectively.

cells tissues organs

Aorta-Derived Mesoangioblasts Can Be Differentiated into Functional Uterine Epithelium, but Not Prostatic Epithelium or Epidermis, by Instructive Mesenchymes