Treatment with polyclonal immunoglobulin during T-cell reconstitution promotes naive T-cell proliferation

Ana Elisabete Pires, Ana Filipa Afonso, Ana Queirós, Maria Salomé Cabral, Luis Porrata, Svetomir Nenad Markovic, Srini V. Kaveri, Maria Gomes Da Silva, Cristina João

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Natural antibodies are unique self molecules endowed with both suppressive and activating functions on various cells of the immune system and are recognized as a fundamental link between the adaptive and innate immune system. Here, we examine the role of natural antibodies, using polyclonal immunoglobulins (Ig), as a promoter of T-cell reconstitution in a context of lymphopenia. We have established a mouse model to mimic immunologic recovery in adult patients with severe hypothymic function subjected to autologous hematopoietic precursor cell transplantation. Thymectomized mice were transplanted and treated with low doses of Ig or its Fab or Fc fragments. The animals displayed, during early phases of Ig treatment, a significant increase of T-cell reconstitution displaying a naive CD4 +phenotype. In addition, the Igtreated animals exhibited an increase dilution of single-joint T-cell receptor excision circles (sjTRECs) in peripheral blood, suggesting an early increase in proliferation of T cells stimulated by the natural antibodies. These results unveil a novel and considerable effect of intravenous Ig treatment in situations of severe lymphopenia as a stimulator of proliferation of peripheral naive T cells, possibly protecting diverse immune repertoires.

Original languageEnglish (US)
Pages (from-to)618-625
Number of pages8
JournalJournal of Immunotherapy
Volume33
Issue number6
DOIs
StatePublished - Jul 2010

Fingerprint

Immunoglobulins
Cell Proliferation
T-Lymphocytes
Lymphopenia
Antibodies
Immune System
Immunoglobulin Fc Fragments
Immunoglobulin Fab Fragments
Intravenous Immunoglobulins
Cell Transplantation
Therapeutics
T-Cell Antigen Receptor
Joints
Phenotype

Keywords

  • Homeostatic peripheral expansion
  • Immune reconstitution
  • Immunoglobulin
  • Naive T lymphocytes
  • TRECs

ASJC Scopus subject areas

  • Immunology
  • Immunology and Allergy
  • Cancer Research
  • Pharmacology

Cite this

Treatment with polyclonal immunoglobulin during T-cell reconstitution promotes naive T-cell proliferation. / Pires, Ana Elisabete; Afonso, Ana Filipa; Queirós, Ana; Cabral, Maria Salomé; Porrata, Luis; Markovic, Svetomir Nenad; Kaveri, Srini V.; Da Silva, Maria Gomes; João, Cristina.

In: Journal of Immunotherapy, Vol. 33, No. 6, 07.2010, p. 618-625.

Research output: Contribution to journalArticle

Pires, AE, Afonso, AF, Queirós, A, Cabral, MS, Porrata, L, Markovic, SN, Kaveri, SV, Da Silva, MG & João, C 2010, 'Treatment with polyclonal immunoglobulin during T-cell reconstitution promotes naive T-cell proliferation', Journal of Immunotherapy, vol. 33, no. 6, pp. 618-625. https://doi.org/10.1097/CJI.0b013e3181d3cb19
Pires, Ana Elisabete ; Afonso, Ana Filipa ; Queirós, Ana ; Cabral, Maria Salomé ; Porrata, Luis ; Markovic, Svetomir Nenad ; Kaveri, Srini V. ; Da Silva, Maria Gomes ; João, Cristina. / Treatment with polyclonal immunoglobulin during T-cell reconstitution promotes naive T-cell proliferation. In: Journal of Immunotherapy. 2010 ; Vol. 33, No. 6. pp. 618-625.
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