Localization of Putative Stem Cells and Four Cell Populations with Different Differentiation Degree in Mouse Mammary Anlagen

Overview

Journal Histochem Cell Biol

Publisher Springer

Specialties Biochemistry
Cell Biology

Date 2006 Feb 4

PMID 16456652

Citations 4

Authors

Jianyong Han

Suying Cao

Hong Jin

Ying Liu

Meili Wang

Jiazhe Song

Ning Li

Affiliations

Soon will be listed here.

Abstract

The precise localization of putative stem cells and other cells within the embryonic mammary gland would help to elucidate the molecular pathways that govern normal mammary development. The ultrastructural appearances and the antigen of Sca-1 were considered together as putative stem cell markers, and the antigens of cytokeratin, CD10, Muc-1 and CD34 as differentiation markers. Electron microscopy was performed to reveal the ultrastructure of cells in different site of the mammary anlagen. An immunofluorescence system was used to reveal the whole structure profile of the mammary anlagen using the anti-cytokeratin antibody to localize specific types of cell populations such as Sca-1, CD10, Muc-1 and CD34 positive cells within the anlagen, which distribute near the inside edge, distribute uniformly, distribute in the central region and distribute in the site of mesenchyme around the neck of the anlagen, respectively. We also observed under electron microscope that some pale cells like putative stem cells reported by prevenient scholars, which are mainly distributed in the Sca-1(+) cell population near the inside edge of the anlagen, have pale-stained nucleoplasm and cytoplasm, sparse organelles clustered close to their nucleus and have a lack of rough endoplasmic reticulums and cell polarization. The results indicate that the putative stem cells are localized near the edge of the mammary anlagen; the cell populations with different differentiation degree were localized in the central part and around the edge within the anlagen.

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