Identification and purification of human stat proteins activated in response to interleukin-2

Jinzhao Hou, Ulrike Schindler, William J. Henzel, Susan C. Wong, Steven L. McKnight

Research output: Contribution to journalArticlepeer-review

143 Scopus citations


A key cytokine Induced during the Immune response is IL-2. Following T cell activation, the genes encoding IL-2 and the various chains of Its receptor are transcriptionally induced. In turn, secreted IL-2 serves to stimulate the proliferation and differentiation of T lymphocytes. Several recent studies have implicated Jak kinasea in the signaling pathway Induced by IL-2. Following this lead, we set out to identify transcription factors Induced In response to IL-2. Human peripheral blood lymphocytes were observed to contain several IL-2-induclbie DNA binding activities. Similar activities were also observed in a transformed human lymphocyte line, termed YT. We have purified these activities and found that the principal IL-2-inducible component bears significant relatedness to a prolactin-induced transcription factor first identified in sheep mammary gland tissue. We hypothesize that activation of this protein, designated hStat5, helps govern the biological effects of IL-2 during the Immune response.

Original languageEnglish (US)
Pages (from-to)321-329
Number of pages9
Issue number4
StatePublished - Apr 1995

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Infectious Diseases


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