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Related Experiment Videos

TSH beta subunit gene expression in human lymphocytes

M E Peele1, F E Carr, J R Baker

  • 1Department of Clinical Investigation, Walter Reed Army Medical Center, Washington, D.C.

The American Journal of the Medical Sciences
|January 1, 1993
PubMed
Summary
This summary is machine-generated.

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Human lymphocytes express the TSH beta subunit gene, crucial for immune response control. This neuroendocrine peptide gene expression, detected via PCR, suggests immune cells play a role in regulating thyroid-stimulating hormone (TSH) peptide production.

Area of Science:

  • Immunology
  • Endocrinology
  • Molecular Biology

Background:

  • Neuroendocrine peptides produced by human lymphocytes may regulate immune responses.
  • The expression of the thyroid-stimulating hormone (TSH) beta subunit gene in lymphocytes was investigated.

Purpose of the Study:

  • To determine if human lymphocytes express the TSH beta subunit gene.
  • To analyze the characteristics of TSH beta subunit gene expression in lymphocytes.

Main Methods:

  • Northern blot analysis of human lymphocyte RNA.
  • Polymerase chain reaction (PCR) amplification of lymphocyte-derived cDNA using TSH beta subunit primers.
  • DNA sequencing of PCR products.
  • Hybridization studies with a TSH beta subunit cDNA probe.

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Main Results:

  • Northern blot analysis did not detect TSH beta subunit message.
  • PCR confirmed the expression and splicing of TSH beta subunit gene exons 2 and 3 in lymphocytes, yielding a .38 Kb DNA fragment.
  • Sequence analysis indicated conservation of exon borders and predicted a TSH beta peptide sequence similar to the human form.
  • Lymphocyte TSH beta subunit gene transcript abundance is lower than in T3-treated pituitary cells.
  • Lymphocyte TSH beta subunit mRNA may be modulated by thyromimetic compounds (T2, T3, TRIAC).

Conclusions:

  • Human lymphocytes express the TSH beta subunit gene, with evidence of correct splicing.
  • The abundance of these transcripts is low and potentially modulated by thyroid hormones.
  • This finding suggests a potential role for lymphocytes in neuroendocrine peptide regulation within the immune system.