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Updated: May 17, 2026

A TIRF Microscopy Technique for Real-time, Simultaneous Imaging of the TCR and its Associated Signaling Proteins
16:10

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Published on: March 22, 2012

Characterization of tumor differentiation factor (TDF) and its receptor (TDF-R)

Izabela Sokolowska1, Alisa G Woods, Mary Ann Gawinowicz

  • 1Biochemistry and Proteomics Group, Department of Chemistry and Biomolecular Science, Clarkson University, 8 Clarkson Avenue, Potsdam, NY 13699-5810, USA.

Cellular and Molecular Life Sciences : CMLS
|October 19, 2012
PubMed

Insights

Tumor differentiation factor (TDF), a pituitary protein, targets breast and prostate cells. Researchers identified Heat Shock 70-kDa proteins (HSP70) as potential TDF receptors, advancing understanding of TDF's endocrine function.

Area of Science:

  • Endocrinology
  • Molecular Biology
  • Cancer Research

Background:

  • Tumor differentiation factor (TDF) is a pituitary-derived protein with an unclear function.
  • TDF is secreted into circulation, targeting breast and prostate tissues, indicating endocrine activity.
  • Previous studies identified TDF's differentiation effects on mammary and prostate cancer cells.

Purpose of the Study:

  • To review current advancements in TDF research.
  • To focus on the structural investigation of the TDF receptor (TDF-R).
  • To elucidate TDF's functional effects on breast and prostate cancer cells.

Main Methods:

  • Expression cloning was used to isolate the TDF-encoding cDNA.
  • In vitro and in vivo studies assessed TDF's differentiation activity on cancer cell lines.
  • Heat Shock 70-kDa proteins (HSP70) were identified as potential TDF-R candidates in breast and prostate cancer cells.

Main Results:

  • TDF exhibits differentiation activity on MCF7 breast and DU145 prostate cancer cells.
  • Members of the HSP70 family were identified as potential TDF receptors in multiple human breast and prostate cancer cell lines.
  • HSP70 was not detected as a TDF-R in non-target cell types like HeLa or fibroblasts.

Conclusions:

  • HSP70 family members are implicated as receptors for TDF in breast and prostate cancer.
  • This finding provides a foundation for understanding TDF's mechanism of action.
  • Further structural investigation of TDF-R is warranted to fully understand TDF's role in endocrine function and cancer cell differentiation.

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