Journal of Diabetes Research

Journal of Diabetes Research / 2002 / Article

Open Access

Volume 3 |Article ID 429351 | https://doi.org/10.1080/15604280212526

Dalit Milo-Landesman, Shimon Efrat, "Growth Factor-Dependent Proliferation of the Pancreatic β-cell Line βTC-tet: An Assay for β-cell Mitogenic Factors", Journal of Diabetes Research, vol. 3, Article ID 429351, 6 pages, 2002. https://doi.org/10.1080/15604280212526

Growth Factor-Dependent Proliferation of the Pancreatic β-cell Line βTC-tet: An Assay for β-cell Mitogenic Factors

Received30 Aug 2001
Revised28 Oct 2001

Abstract

The ability to expand normal pancreatic islet β cells in culture would significantly advance the prospects of cell therapy for diabetes. A number of growth factors can stimulate limited islet cell replication, however other factors may exist which are more effective β-cell-specific mitogens. The search for novel β-cell growth factors has been hampered by the lack of a β-cell-specific proliferation assay. We developed a simple and sensitive assay for β-cell growth factors based on a conditionally-transformed mouse β-cell line (βTC-tet). These cells express the SV40 T antigen (Tag) oncoprotein under control of the tetracycline (Tc) operon regulatory system. In the presence of Tc, Tag expression is tightly shut off and the cells undergo complete growth arrest. Here we show that the growth-arrested cells can proliferate in response to growth factors in the absence of Tag. Using this assay, a number of growth factors previously shown to be mitogenic to a mixed islet cell population were found to induce proliferation of pure β cells. We conclude that growth-arrested βTC-tet cells can be employed in a survey of factors from various sources for identifying novel factors with β-cell mitogenic activity.

Copyright © 2002 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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