{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nGTF2IP4, also known in these studies as axotrophin or MARCH-7, encodes a putative ubiquitin E3 ligase that plays a critical role in regulating T cell activation and tolerance. In murine transplantation models, axotrophin expression is closely linked to regulatory pathways by influencing Foxp3 levels in thymic regulatory T cell development, with loss of axotrophin resulting in reduced Foxp3 transcripts and correlating with exacerbated graft‐versus‐host disease in clinical settings."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": ""}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn addition to its function in T cell regulation, the absence of MARCH-7/axotrophin unmasks a novel signaling axis in T lymphocytes involving the stem cell transcription factor Nanog. In these investigations, MARCH-7–deficient T cells displayed enhanced Nanog expression during cell cycle entry, an effect that was further amplified by exogenous leukemia inhibitory factor (LIF). This finding emphasizes a role for the LIF/Nanog axis in modulating T cell responsiveness and suggests that GTF2IP4 integrates signals from cytokine pathways with mechanisms controlling cellular “stemness.”."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": ""}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nTogether, these studies demonstrate that GTF2IP4 (axotrophin/MARCH-7) functions as a pivotal modulator within T cells by coordinating responses to LIF and controlling key transcriptional regulators such as Foxp3 and Nanog. This dual role enables it to both maintain immune tolerance during transplantation and fine-tune T cell activation, marking it as an important node in linking cytokine-signaling pathways with the regulation of cell fate and function."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": ""}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Poorni A D S Muthukumarana, Gary E Lyons, Yuji Miura, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Evidence for functional inter-relationships between FOXP3, leukaemia inhibitory factor, and axotrophin/MARCH-7 in transplantation tolerance."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Int Immunopharmacol (2006)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1016/j.intimp.2006.09.015"}], "href": "https://doi.org/10.1016/j.intimp.2006.09.015"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "17161353"}], "href": "https://pubmed.ncbi.nlm.nih.gov/17161353"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Lorraine H Thompson, Roy A Whiston, Yerzhan Rakhimov, et al. "}, {"type": "b", "children": [{"type": "t", "text": "A LIF/Nanog axis is revealed in T lymphocytes that lack MARCH-7, a RINGv E3 ligase that regulates the LIF-receptor."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Cell Cycle (2010)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.4161/cc.9.20.13543"}], "href": "https://doi.org/10.4161/cc.9.20.13543"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "20962578"}], "href": "https://pubmed.ncbi.nlm.nih.gov/20962578"}]}]}]}