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Updated: Aug 14, 2026

Generation of Induced Regulatory T Cells from Primary Human Naïve and Memory T Cells
Published on: April 16, 2012
hNT neurons express an immunosuppressive protein that blocks T-lymphocyte proliferation and interleukin-2 production
W R Gower1, P R Sanberg, P G Brown
1Department of Biochemistry and Molecular Biology, College of Medicine, University of South Florida, James A. Haley Veterans Hospital, Tampa, FL 33612, USA.
Abstract:
Ntera2/D1 cells had an A1 B8 Bw6 Cw7 DR3 DR52 major histocompatibility complex (MHC) genotype. Its neuronal derivative, hNT neurons, expressed A1 B8 Bw6 MHC class I molecules, but did not activate, and its hNT supernatant suppressed allogeneic mixed lymphocyte cultures (MLC) >98% (p<0.01), phytohemagglutinin (PHA)-activated T-cell proliferation >87% (p<0.01), even 48 h after stimulation, suppressed phorbol 12-myristate 13-acetate (PMA)/ionomycin-induced T-cell proliferation >99% (p<0.001), and reduced interleukin-2 (IL-2) production (p<0.01), while maintaining T cells in a quiescent G(0)/G(1) state without lowering their viability. This immunosuppressive activity was attributed to a 40-100-kDa anionic hNT protein with an isoelectric point of 4.8.
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