JAK/STAT signaling pathway gene expression is reduced following Nelf knockdown in GnRH neurons

Eun Kyung Ko, Lynn P. Chorich, Megan E. Sullivan, Richard S. Cameron, Lawrence C. Layman

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Hypothalamic gonadotropin releasing hormone (GnRH) is crucial for the proper function of the hypothalamic-pituitary-gonadal (HPG) axis, subsequent puberty, and reproduction. When GnRH neuron migration or GnRH regulation is impaired, hypogonadotropic hypogonadism results. Mutations in the gene for nasal embryonic luteinizing hormone-releasing factor (NELF) have been identified in GnRH-deficient humans. NELF is a predominantly nuclear protein that may participate in gene transcription, but the genes NELF regulates are unknown. To address this question, RNA was extracted from NLT GnRH neuronal cells following either stable Nelf knockdown or scrambled control and subjected to cDNA arrays. Transcription factors and cell migration gene expression was altered most commonly. Members of the Janus kinase/signal transducers and activators of transcription (JAK/STAT) pathway, including Stat1, Stat2, Stat5a, Jak2, Irf7 and Irf9, were significantly down regulated as assessed by RT-qPCR. Protein levels of STAT1, phospho-STAT1, and JAK2 were reduced, but the protein level of phospho-JAK2 was not. These findings suggest a role for NELF in the regulation of the JAK/STAT signaling pathway, which have important functions in GnRH neurons.

Original languageEnglish (US)
Pages (from-to)151-159
Number of pages9
JournalMolecular and Cellular Endocrinology
Volume470
DOIs
StatePublished - Jul 15 2018

Keywords

  • GnRH neurons
  • JAK/STAT pathway
  • NLT cells
  • Nasal embryonic LHRH factor (NELF)
  • cDNA array
  • shRNA lentiviral particles

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Endocrinology

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