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SOCS proteins: modulators of neuroimmunoendocrine functions. Impact on corticotroph LIF signaling

C J Auernhammer1, C Bousquet, V Chesnokova

  • 1Cedars-Sinai Medical Center, 8700 Beverly Blvd., Room 2015, Los Angeles, CA 90048, USA.

Annals of the New York Academy of Sciences
|March 28, 2001
PubMed

Insights

Suppressor of Cytokine Signaling (SOCS) proteins regulate cytokine signaling. This review focuses on SOCS proteins

Area of Science:

  • Neuroendocrinology
  • Immunology
  • Molecular Biology

Background:

  • Suppressor of Cytokine Signaling (SOCS) proteins, including SOCS-1, SOCS-3, and CIS, are key negative regulators of cytokine-induced Janus Kinase-Signal Transducer and Activator of Transcription (Jak-STAT) signaling pathways.
  • SOCS protein expression is induced by various cytokines and hormones in a tissue-specific manner, highlighting their diverse roles in cellular communication.
  • These proteins significantly modulate neuroimmunoendocrine functions, influencing signaling pathways of hormones like leptin, growth hormone, and prolactin.

Purpose of the Study:

  • To review the current understanding of SOCS proteins and their function as modulators of neuroimmunoendocrine signaling.
  • To specifically focus on the impact of SOCS proteins, particularly SOCS-3, on leukemia inhibitory factor (LIF) signaling within the pituitary gland.
  • To discuss the negative autoregulatory role of SOCS-3 in LIF-induced proopiomelanocortin (POMC) gene expression and adrenocorticotropic hormone (ACTH) secretion.

Main Methods:

  • Review of existing scientific literature and data.
  • Analysis of the molecular mechanisms underlying SOCS protein function.
  • Focus on studies investigating LIF signaling and its regulation in the pituitary corticotroph lineage.

Main Results:

  • SOCS proteins are critical negative feedback regulators in cytokine signaling cascades.
  • Leukemia Inhibitory Factor (LIF) signaling impacts pituitary development, POMC gene expression, and ACTH secretion.
  • SOCS-3 plays a crucial negative autoregulatory role in LIF-induced POMC gene expression and ACTH secretion.

Conclusions:

  • SOCS proteins are essential regulators of cytokine and neuroimmunoendocrine signaling.
  • SOCS-3 is a key inhibitor of LIF-induced signaling pathways in pituitary corticotrophs.
  • Understanding SOCS protein function provides insights into the regulation of hormone secretion and pituitary development.

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