PROTEUS syndrome is characterized by patchy and progressive overgrowth affecting multiple tissues, including bone, soft tissue, and skin, along with susceptibility to the development oftumors. It was originally descri...PROTEUS syndrome is characterized by patchy and progressive overgrowth affecting multiple tissues, including bone, soft tissue, and skin, along with susceptibility to the development oftumors. It was originally described by Cohen and Hayden in 19791 and named by Wiedmann in 1983.2 The cause of Proteus syndrome is proposed to be a somatic mutation that is lethal in non-mosaic state; cells derived from the mutated cell line carrying this mutation result in anomalies in multiple tissues.3 The clinical manifestations are variable,展开更多
CD4^(+)T cells play major roles in the adaptive immune system,which requires antigen recognition,costimulation,and cytokines for its elaborate orchestration.Recent studies have provided new insight into the importance...CD4^(+)T cells play major roles in the adaptive immune system,which requires antigen recognition,costimulation,and cytokines for its elaborate orchestration.Recent studies have provided new insight into the importance of the supramolecular activation cluster(SMAC),which comprises concentric circles and is involved in the amplification of CD4^(+)T cell activation.However,the underlying mechanism of SMAC formation remains poorly understood.Here,we performed single-cell RNA sequencing of CD4^(+)T cells left unstimulated and stimulated with anti-CD3 and anti-CD28 antibodies to identify novel proteins involved in their regulation.We found that intraflagellar transport 20(IFT20),previously known as cilia-forming protein,was upregulated in antibody-stimulated CD4^(+)T cells compared to unstimulated CD4^(+)T cells.We also found that IFT20 interacted with tumor susceptibility gene 101(TSG101),a protein that endocytoses ubiquitinated T-cell receptors.The interaction between IFT20 and TSG101 promoted SMAC formation,which led to amplification of AKT-mTOR signaling.However,IFT20-deficient CD4^(+)T cells showed SMAC malformation,resulting in reduced CD4^(+)T cell proliferation,aerobic glycolysis,and cellular respiration.Finally,mice with T-cell-specific IFT20 deficiency exhibited reduced allergen-induced airway inflammation.Thus,our data suggest that the IFT20-TSG101 axis regulates AKT-mTOR signaling via SMAC formation.展开更多
文摘PROTEUS syndrome is characterized by patchy and progressive overgrowth affecting multiple tissues, including bone, soft tissue, and skin, along with susceptibility to the development oftumors. It was originally described by Cohen and Hayden in 19791 and named by Wiedmann in 1983.2 The cause of Proteus syndrome is proposed to be a somatic mutation that is lethal in non-mosaic state; cells derived from the mutated cell line carrying this mutation result in anomalies in multiple tissues.3 The clinical manifestations are variable,
基金the National Research Foundation of Korea(NRF-2021M3A9D3026428)the Ministry of Science and ICT of Korea.J.Jeong is a recipient of funding from the Global Ph.D.Fellowship Program(NRF-2019H1A2A1076865)of the National Research Foundation of Korea.
文摘CD4^(+)T cells play major roles in the adaptive immune system,which requires antigen recognition,costimulation,and cytokines for its elaborate orchestration.Recent studies have provided new insight into the importance of the supramolecular activation cluster(SMAC),which comprises concentric circles and is involved in the amplification of CD4^(+)T cell activation.However,the underlying mechanism of SMAC formation remains poorly understood.Here,we performed single-cell RNA sequencing of CD4^(+)T cells left unstimulated and stimulated with anti-CD3 and anti-CD28 antibodies to identify novel proteins involved in their regulation.We found that intraflagellar transport 20(IFT20),previously known as cilia-forming protein,was upregulated in antibody-stimulated CD4^(+)T cells compared to unstimulated CD4^(+)T cells.We also found that IFT20 interacted with tumor susceptibility gene 101(TSG101),a protein that endocytoses ubiquitinated T-cell receptors.The interaction between IFT20 and TSG101 promoted SMAC formation,which led to amplification of AKT-mTOR signaling.However,IFT20-deficient CD4^(+)T cells showed SMAC malformation,resulting in reduced CD4^(+)T cell proliferation,aerobic glycolysis,and cellular respiration.Finally,mice with T-cell-specific IFT20 deficiency exhibited reduced allergen-induced airway inflammation.Thus,our data suggest that the IFT20-TSG101 axis regulates AKT-mTOR signaling via SMAC formation.
