title: Defining Th1 and Th2 immune responses in a reciprocal cytokine environment in vivo.
abstract: The ability of committed Th1 and Th2 cells to function in altered cytokine environments is a central issue in autoimmune and immune-mediated diseases. Therefore, it is of interest to study the ability of Th1 or Th2 cells to expand and produce cytokine reciprocal environments in vivo. Using STAT4- and STAT6-deficient mice, we studied the expansion and cytokine production of Ag-specific Th1 or Th2 cells after transfer into Th1, Th2, or wild-type recipients. Our data show that these Th1 or Th2 cells proliferated and clonally expanded normally, regardless of the in vivo cytokine environment. These data have implications for the treatment of immune-mediated diseases by immunomodulatory agents that alter the cytokine milieu in vivo.
authors.affiliation: Center for Neurologic Diseases, Laboratory of Immunogenetics and Transplantation, Brigham and Women's Hospital, Harvard School of Public Health, Harvard Medical School, Boston, MA 02115, USA.
authors.forename: Tanuja
authors.initials: T
authors.lastname: Chitnis
authors.forename: Alan D
authors.initials: AD
authors.lastname: Salama
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Grusby
authors.forename: Mohamed H
authors.initials: MH
authors.lastname: Sayegh
authors.forename: Samia J
authors.initials: SJ
authors.lastname: Khoury
mesh_terms: D019264:Adoptive Transfer; D000818:Animals; D015496:CD4-Positive T-Lymphocytes / Q000637:transplantation; D002454:Cell Differentiation / Q000235:genetics / Q000276:immunology; D002478:Cells, Cultured; D016207:Cytokines / Q000096:biosynthesis / Q000502:physiology*; D018984:Epitopes, T-Lymphocyte / Q000008:administration & dosage / Q000276:immunology; D005260:Female; D005434:Flow Cytometry; D008213:Lymphocyte Activation / Q000235:genetics / Q000276:immunology; D051379:Mice; D008807:Mice, Inbred BALB C; D018345:Mice, Knockout; D008822:Mice, Transgenic; D010047:Ovalbumin / Q000008:administration & dosage / Q000276:immunology; D018417:Th1 Cells / Q000166:cytology / Q000276:immunology* / Q000378:metabolism*; D018418:Th2 Cells / Q000166:cytology / Q000276:immunology* / Q000378:metabolism*
chemical_list: D016207:Cytokines; D018984:Epitopes, T-Lymphocyte; D010047:Ovalbumin