Comprehensive Map and Functional Annotation of Human Pituitary and Thyroid Proteome

Area of Science:

• Proteomics
• Endocrinology
• Human Physiology

Background:

• Understanding the human tissue proteome is crucial for insights into organ physiology.
• Comprehensive proteomic datasets for key endocrine glands are lacking.

Purpose of the Study:

• To create a comprehensive dataset of human pituitary and thyroid proteins.
• To identify novel proteins and functionally annotate the proteomes of these endocrine glands.
• To compare the functional roles of pituitary and thyroid proteomes.

Main Methods:

• Utilized post-mortem pituitary and thyroid tissues from 10 normal individuals.
• Employed immunoaffinity depletion of high-abundance proteins and direct digestion methods.
• Identified and quantified proteins using mass spectrometry-based proteomics.

Main Results:

• Identified 7596 proteins in the pituitary and 5602 in the thyroid with high confidence.
• Quantified 6623 pituitary and 4368 thyroid proteins.
• Discovered 5781 novel pituitary and 3178 novel thyroid proteins not previously reported in normal tissues.
• Found thyroid proteome involved in nerve regeneration and metabolism, while pituitary proteome is linked to signal transduction and cancer modulation.

Conclusions:

• This study presents the largest high-confidence proteome dataset for the pituitary and thyroid glands.
• The findings provide a valuable resource for biomarker identification and understanding molecular mechanisms of endocrine disorders.
• Functional annotation reveals distinct roles for pituitary and thyroid in human health.