T-cell seeding: neonatal transfer of anti-myelin basic protein T-cell lines renders Fischer rats susceptible later in life to the active induction of experimental autoimmune encephalitis.
Fischer strain rats resist active induction of experimental autoimmune encephalomyelitis (EAE) following immunization with guinea-pig myelin basic protein (MBP) in complete Freund's adjuvant (CFA). Nevertheless, we now report that an encephalitogenic CD4(+) anti-MBP T-cell line could be developed from actively immunized Fischer rats. Adoptive transfer of the activated line mediated acute EAE in adult Fischer rats, but not in 1-day-old rats. Moreover, we found that both resting and activated anti-MBP T cells injected 1 day post-natally rendered these rats susceptible later in life to the active induction of EAE by immunization with MBP/CFA. The actively induced EAE manifested the accelerated onset of a secondary, memory-type response. Resting anti-MBP T cells injected even up to 2 weeks post-natally produced no clinical signs but seeded 50-100% of the recipients for an active encephalitogenic immune response to MBP. An earlier T-cell injection (1-2 days) produced a higher incidence and stronger response. The transferred resting T cells entered the neonatal spleen and thymus and proliferated there but did not change the total anti-MBP precursor number in adults. Splenocytes harvested from rats that were injected neonatally but not exposed to MBP in vivo proliferated strongly and produced significant amounts of interferon-gamma to MBP in vitro. Similar results were observed in rats injected with resting T-cell lines reactive to ovalbumin, suggesting that the neonatal injection of resting T cells specific for a self or for a foreign antigen can seed the immune system with the potential for an enhanced effector response to that antigen later in life.
Volovitz
Ilan
I
Department of Immunology, Weizmann Institute of Science, Rehovot, Israel. Volovitz@yahoo.com
Mor
Felix
F
Machlenkin
Arthur
A
Machlenkin
Athur
A
Goldberger
Ofir
O
Marmor
Yotvat
Y
Eisenbach
Lea
L
Cohen
Irun R
IR
Cohen
Irun
I
D019264:Adoptive Transfer; D000818:Animals; D000831:Animals, Newborn; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology / Q000637:transplantation*; D002460:Cell Line; D049109:Cell Proliferation; D004198:Disease Susceptibility; D004681:Encephalomyelitis, Autoimmune, Experimental / Q000276:immunology*; D008213:Lymphocyte Activation / Q000276:immunology; D004676:Myelin Basic Protein / Q000276:immunology*; D010047:Ovalbumin / Q000276:immunology; D051381:Rats; D011916:Rats, Inbred F344; D011917:Rats, Inbred Lew; D013154:Spleen / Q000276:immunology; D013950:Thymus Gland / Q000276:immunology
D004676:Myelin Basic Protein; D010047:Ovalbumin
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