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2016 ; 10
(6
): 6189-200
Nephropedia Template TP
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English Wikipedia
Conformal Nanoencapsulation of Allogeneic T Cells Mitigates Graft-versus-Host
Disease and Retains Graft-versus-Leukemia Activity
#MMPMID27224853
Zhao S
; Zhang L
; Han J
; Chu J
; Wang H
; Chen X
; Wang Y
; Tun N
; Lu L
; Bai XF
; Yearsley M
; Devine S
; He X
; Yu J
ACS Nano
2016[Jun]; 10
(6
): 6189-200
PMID27224853
show ga
Allogeneic transplantation of hematopoietic stem cells (HSC) in combination with
T cells has a curative potential for hematopoietic malignancies through
graft-versus-leukemia (GVL) effects, but is often compromised by the notorious
side effect of graft-versus-host disease (GVHD) resulting from alloreactivity of
the donor T cells. Here, we tested if temporary immunoisolation achieved by
conformally encapsulating the donor T cells within a biocompatible and
biodegradable porous film (?450 nm in thickness) of chitosan and alginate could
attenuate GVHD without compromising GVL. The nanoencapsulation was found not to
affect the phenotype of T cells in vitro in terms of size, viability,
proliferation, cytokine secretion, and cytotoxicity against tumor cells.
Moreover, the porous nature of the nanoscale film allowed the encapsulated T
cells to communicate with their environment, as evidenced by their intact
capability of binding to antibodies. Lethally irradiated mice transplanted with
bone marrow cells (BMCs) and the conformally encapsulated allogeneic T cells
exhibited significantly improved survival and reduced GVHD together with minimal
liver damage and enhanced engraftment of donor BMCs, compared to the
transplantation of BMCs and non-encapsulated allogeneic T cells. Moreover, the
conformal nanoencapsulation did not compromise the GVL effect of the donor T
cells. These data show that conformal nanoencapsulation of T cells within
biocompatible and biodegradable nanoscale porous materials is a potentially safe
and effective approach to improve allogeneic HSC transplantation for treating
hematological malignancies and possibly other diseases.