Reconstitution of C.B-17 scid mice with BALB/c T cells initiates a T helper type-1 response and renders them capable of healing Leishmania major infection

Eur J Immunol. 1993 Jan;23(1):262-8. doi: 10.1002/eji.1830230141.


C.B-17 scid mice, which were found to be very susceptible to infection with Leishmania major, were reconstituted with various doses of T cells, T plus B cells or unfractionated spleen cells from nonhealer BALB/c mice. All reconstitution protocols, except for the transfer of very high numbers of BALB/c spleen cells, led to a spontaneously healing infection and resistance to reinfection, rather than the lethal, nonhealing infection typical of BALB/c mice. These healing responses were associated with a strong T helper 1 (Th1)-like response characterized by delayed-type hypersensitivity (DTH) responsiveness, but no elevation of serum IgE, and by the production of high levels of interferon-gamma (IFN-gamma), but no interleukin-4 (IL-4) by lymph node and spleen cells after restimulation with antigen in vitro. The development of this Th1 response from BALB/c Th cells requires IFN-gamma during the initial infection period. Treatment of scid mice with a single injection of neutralizing anti-IFN-gamma antibody prior to infection and reconstitution prevented healing and permitted the development of a Th-2 like response as indicated by elevated serum IgE, but no DTH, and by the production of IL-4, but very little IFN-gamma, after antigen stimulation in vitro. As few as 10(4) transferred T cells led to a Th1-like response, suggesting that the IFN-gamma is of host rather than donor origin. The transfer of very high numbers (7.5 x 10(7)) of BALB/c spleen cells overcame the effects of the IFN-gamma and led to the nonhealing infection and cytokine pattern characteristic of BALB/c mice. The enrichment or depletion of B cells from the transferred T cells had no measurable effect upon the development of a healing response in reconstituted scid mice.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • B-Lymphocytes / immunology
  • Female
  • Hypersensitivity, Delayed / immunology
  • Immunoglobulin E / blood
  • Immunotherapy, Adoptive
  • Interferon-gamma / biosynthesis
  • Interferon-gamma / immunology
  • Interleukin-4 / biosynthesis
  • Leishmania tropica*
  • Leishmaniasis, Cutaneous / immunology*
  • Mice
  • Mice, Inbred BALB C
  • Mice, Inbred C3H
  • Mice, SCID
  • Spleen / metabolism
  • T-Lymphocytes, Helper-Inducer / immunology*


  • Interleukin-4
  • Immunoglobulin E
  • Interferon-gamma