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Related Experiment Videos

Expression of a human chimeric transferrin gene in senescent transgenic mice reflects the decrease of transferrin

G S Adrian1, D C Herbert, L K Robinson

  • 1Department of Cellular and Structural Biology, University of Texas Health Science Center, San Antonio 78284-7762.

Biochimica Et Biophysica Acta
|September 24, 1992
PubMed
Summary

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Aging impacts human gene expression, with human transferrin (TF) levels decreasing in mouse models and humans. Mouse transferrin, however, increases with age, suggesting distinct regulatory mechanisms despite sequence homology.

Area of Science:

  • Genetics
  • Aging Research
  • Molecular Biology

Background:

  • Transgenic mice are valuable models for studying human gene expression during aging.
  • The transferrin gene plays a crucial role in iron metabolism and is subject to age-related changes.

Purpose of the Study:

  • To investigate the age-dependent expression of the human transferrin gene in a mouse model.
  • To compare the aging effects on human and mouse transferrin expression and iron levels.

Main Methods:

  • Constructed a chimeric human transferrin-chloramphenicol acetyl transferase (TF-CAT) gene for introduction into mice.
  • Analyzed TF-CAT expression in aging transgenic mice.
  • Measured serum transferrin and iron levels in aging humans.

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Main Results:

  • Human TF-CAT expression decreased by 40% in the livers of aging transgenic mice.
  • Human serum transferrin and iron levels also diminished with age.
  • Conversely, endogenous mouse transferrin and Tf mRNA levels increased significantly in aging mice.

Conclusions:

  • Human and mouse transferrin genes exhibit differential responses to aging, despite conserved 5' regulatory regions.
  • Sequence variations may explain the distinct aging and inflammatory responses observed between human and mouse transferrin.