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. 2018 Dec;22(12):759-769.
doi: 10.1089/omi.2018.0160.

Proteomic Analysis of the Human Anterior Pituitary Gland

Affiliations

Proteomic Analysis of the Human Anterior Pituitary Gland

Soujanya D Yelamanchi et al. OMICS. 2018 Dec.

Abstract

The pituitary function is regulated by a complex system involving the hypothalamus and biological networks within the pituitary. Although the hormones secreted from the pituitary have been well studied, comprehensive analyses of the pituitary proteome are limited. Pituitary proteomics is a field of postgenomic research that is crucial to understand human health and pituitary diseases. In this context, we report here a systematic proteomic profiling of human anterior pituitary gland (adenohypophysis) using high-resolution Fourier transform mass spectrometry. A total of 2164 proteins were identified in this study, of which 105 proteins were identified for the first time compared with high-throughput proteomic-based studies from human pituitary glands. In addition, we identified 480 proteins with secretory potential and 187 N-terminally acetylated proteins. These are the first region-specific data that could serve as a vital resource for further investigations on the physiological role of the human anterior pituitary glands and the proteins secreted by them. We anticipate that the identification of previously unknown proteins in the present study will accelerate biomedical research to decipher their role in functioning of the human anterior pituitary gland and associated human diseases.

Keywords: anterior pituitary; biomarkers; diagnostics; endocrinology; ophthalmology; proteomics.

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Conflict of interest statement

The authors declare that no conflicting financial interests exist.

Figures

<b>FIG. 1.</b>
FIG. 1.
Schematic representation of anatomical structure and proteomic analysis of human pituitary gland. (A) The detailed structure of human pituitary glands. (B) The methodology used using different fractionation techniques and LC-MS/MS analysis for the identification of proteins from human adenohypophysis. LC-MS/MS, liquid chromatography–mass spectrometry/mass spectrometry.
<b>FIG. 2.</b>
FIG. 2.
Representative MS/MS spectra. MS/MS spectra for peptides corresponding to proteins identified from human pituitary gland—(A) synapsin-1 [SYN1]; (B) aquaporin-1 [AQP1]; (C) calmodulin [CALM3]; and (D) prolyl endopeptidase [PREP]. The fragmented ions are indicated as b, y, and a ions. Internal fragmented ions are also clearly represented.
<b>FIG. 3.</b>
FIG. 3.
GO analysis. (A) Biological processes such as signal transduction, protein metabolism, and transport were the GO terms derived from human adenohypophysis proteins; (B) cellular components, including cytoplasm, nucleus, extracellular and plasma membrane, are illustrated. GO, Gene Ontology.
<b>FIG. 4.</b>
FIG. 4.
Aryl-hydrocarbon signaling pathway. The signaling pathway map exhibiting distinct reactions under receptor activation. Twenty-four proteins were identified to be associated with this pathway, as highlighted.

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