These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Role of in situ IL-2r and TGF-beta expression in tolerant vascularized bone marrow (limb) transplant chimeras.
    Author: Tatem LD, Hirpara S, Dalsey RM, Iannacone WM, DeLong WG, Hewitt CW.
    Journal: Transplant Proc; 1997 Jun; 29(4):2194-5. PubMed ID: 9193586.
    Abstract:
    We hypothesized that an increase in IL-2 activated T cells in situ within the marrow component of a transplanted limb may adversely affect development of tolerance, while increased TGF-beta expression locally would facilitate tolerance induction and/or maintenance. Digital image analysis of cellular expression of IL-2r in the bone marrow was significantly increased in the CON and TXP limbs for both GVHD and tolerant recipients as compared to normal limb marrow (P < .02). The amount of cellular expression of TGF-beta was significantly increased in the GVHD animals, both CON and TXP, as compared to the tolerant animals (43.2 +/- 3.1 vs 10.6 +/- 2.6; P < .000001). Our results show that increased IL-2r and TGF-beta expression in situ within the bone marrow is an important effect common to both alloimmune tolerance and GVHD induction with VBMT chimeras. The dramatic increase in the expression of TGF-beta in the GVHD transplanted limbs may explain the profound immunosuppression that results. Additionally, moderate expression of TGF-beta in situ in tolerant chimeras may represent a mechanism for the induction and maintenance of tolerance.
    [Abstract] [Full Text] [Related] [New Search]