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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Blood+Adv
2018 ; 2
(14
): 1664-1679
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
TNP-470 skews DC differentiation to Th1-stimulatory phenotypes and can serve as a
novel adjuvant in a cancer vaccine
#MMPMID30012585
Ho DH
; Wong RH
Blood Adv
2018[Jul]; 2
(14
): 1664-1679
PMID30012585
show ga
Fumagillin is an antiangiogenic and antineoplastic fungal natural product, and
TNP-470 is one of its most potent analogs. Decades of studies revealed that
TNP-470 has potent anticancer activities via destruction of neovasculature. In
stark contrast, TNP-470 has been reported to suppress lymphocyte proliferation,
thereby limiting its clinical potentials. In an attempt to investigate whether
the similar or opposite immunomodulatory effect of TNP-470 could act on myeloid
cells, we found that TNP-470 potentiates the immunogenicity of dendritic cells
(DCs) toward a phenotype with T helper cell type 1 (Th1)-stimulatory features.
Using DC vaccine on a murine melanoma cancer model, the TNP-470-treated DC
vaccine could significantly induce tumor-specific immunogenicity and
substantially enhance tumor eradication when compared with vehicle-treated DC
vaccine in a prophylactic setting. Enhanced tumor-specific immunogenicity and
delayed tumor progression were observed in a therapeutic setting upon the
TNP-470-treated DC vaccine. Our data showed that TNP-470 potentiates Toll-like
receptor signaling, including NF-?B activation, in DCs to transcriptionally
activate interleukin-12 production, thus inducing a Th1-immune response. Our
current study uncovers a novel immune function of TNP-470 in DCs and redefines
its role as a novel class of small molecule immune adjuvant in DC-based cancer
vaccine given potentiation of DC immunogenicity is a major roadblock in DC
vaccine development. Our study not only provides a novel adjuvant for ex
vivo-cultured patient-specific DC vaccines for cancer treatment but also
discovers the distinct immunostimulatory function of TNP-470 in DCs of myeloid
lineage that differs from its immunosuppressive function in lymphoid cells.