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The thyroid hormone (TH) plays a pivotal role in the intricate orchestration of physiological processes, exerting profound effects on development, metabolism, and homeostasis throughout different life stages.
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Low blood levels of the thyroid hormones — triiodothyronine (T3) and thyroxine (T4) — signal the hypothalamus to release the thyrotropin-releasing hormone (TRH). TRH then reaches the pituitary gland and stimulates the release of thyroid-stimulating hormone(TSH) into the bloodstream.
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Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences  access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area. 
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A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is comprised  of nucleotides and proteins are comprised of amino acids, a mediator is required to convert the information encoded in DNA into proteins. This mediator is the messenger RNA (mRNA). mRNA copies the blueprint from DNA by a process called transcription. In eukaryotes, transcription occurs in the nucleus by complementary base-pairing with the DNA template. The mRNA is then...
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Gene expression differences between thyroid carcinoma, thyroid adenoma and normal thyroid tissue.

Quan Wang1, Yilin Shen2, Bin Ye3

  • 1Department of Otolaryngology & Head and Neck Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, P.R. China.

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|October 2, 2018
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Summary
This summary is machine-generated.

This study identified key gene expression differences in thyroid tumors, revealing potential biomarkers like Insulin-like growth factor 2 (IGF2) and Von Willebrand factor (VWF) for diagnosing thyroid carcinoma and adenoma.

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Area of Science:

  • Genomics
  • Molecular Biology
  • Oncology

Background:

  • Thyroid neoplasms, including carcinoma and adenoma, present diagnostic challenges.
  • Understanding gene expression differences is crucial for identifying diagnostic and therapeutic targets.

Purpose of the Study:

  • To identify differentially expressed genes between normal thyroid (N), thyroid adenoma (A), and thyroid carcinoma (C) epithelial cells.
  • To discover potential biomarkers for distinguishing between benign and malignant thyroid neoplasms.

Main Methods:

  • Gene expression profiles were analyzed using pairwise comparisons with GEO2R.
  • Gene ontology and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis were performed for functional classification.
  • Hub genes were identified and validated using logistic regression.

Main Results:

  • Significant gene expression differences were observed across N vs. A, N vs. C, and A vs. C comparisons.
  • Key hub genes identified include Insulin-like growth factor 2 (IGF2), Von Willebrand factor (VWF), multimerin 1 (MMRN1), and complement factor D (CFD).
  • Specific gene sets were associated with each comparison, highlighting distinct molecular signatures.

Conclusions:

  • The identified gene expression profiles and hub genes may serve as novel biomarkers for the differential diagnosis of thyroid neoplasms.
  • These findings could contribute to improved prognosis and the development of targeted therapies for thyroid cancer.