Gamma Interferon Induction in Human Thymocytes Activated by Lectins and B Cell Lines
Overview
Authors
Affiliations
Human thymocytes in culture synthesized small quantities of interferon (IFN) when stimulated by the lectins concanavalin A or phytohemagglutinin. IFN production by lectin-activated thymocytes was enhanced in the presence of live B lymphoblastoid cells, irradiated B lymphoblastoid cells, or the conditioned medium from B lymphoblastoid cell cultures. The IFN synthesized in mixed cultures had characteristics of IFN-gamma, whereas the IFN synthesized by B lymphoblastoid cells alone could be identified as IFN-alpha on the basis of its neutralization with specific antisera and stability at pH 2. These findings indicate that human thymocytes in culture synthesize IFN-gamma and that B lymphoblastoid cells and their products considerably stimulate IFN-gamma synthesis by lectin-activated human thymocytes in culture. This stimulation was not diminished in the presence of antibodies to IFN-alpha, indicating that IFN-alpha production by B lymphoblastoid cells was not responsible for the stimulatory effect. Removal of adherent cells from thymocyte suspensions did not abrogate IFN-gamma production.
Aging influences the response of T cells to stimulation by the ellagitannin, oenothein B.
Ramstead A, Schepetkin I, Todd K, Loeffelholz J, Berardinelli J, Quinn M Int Immunopharmacol. 2015; 26(2):367-77.
PMID: 25887271 PMC: 4545278. DOI: 10.1016/j.intimp.2015.04.008.
Defective gamma interferon production in leprosy. Reversal with antigen and interleukin 2.
Nogueira N, Kaplan G, Levy E, Sarno E, KUSHNER P, Granelli-Piperno A J Exp Med. 1983; 158(6):2165-70.
PMID: 6417263 PMC: 2187179. DOI: 10.1084/jem.158.6.2165.
Reem G, Yeh N, Urdal D, Kilian P, Farrar J Proc Natl Acad Sci U S A. 1985; 82(24):8663-6.
PMID: 3936041 PMC: 391496. DOI: 10.1073/pnas.82.24.8663.
Kobayashi M, Fitz L, Ryan M, Hewick R, Clark S, Chan S J Exp Med. 1989; 170(3):827-45.
PMID: 2504877 PMC: 2189443. DOI: 10.1084/jem.170.3.827.