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2016 ; 107
(9
): 1198-205
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Antitumor effect of novel anti-podoplanin antibody NZ-12 against malignant
pleural mesothelioma in an orthotopic xenograft model
#MMPMID27294401
Abe S
; Kaneko MK
; Tsuchihashi Y
; Izumi T
; Ogasawara S
; Okada N
; Sato C
; Tobiume M
; Otsuka K
; Miyamoto L
; Tsuchiya K
; Kawazoe K
; Kato Y
; Nishioka Y
Cancer Sci
2016[Sep]; 107
(9
): 1198-205
PMID27294401
show ga
Podoplanin (aggrus) is highly expressed in several types of cancers, including
malignant pleural mesothelioma (MPM). Previously, we developed a rat anti-human
podoplanin mAb, NZ-1, and a rat-human chimeric anti-human podoplanin antibody,
NZ-8, derived from NZ-1, which induced antibody-dependent cellular cytotoxicity
(ADCC) and complement-dependent cytotoxicity against podoplanin-positive MPM cell
lines. In this study, we showed the antitumor effect of NZ-1, NZ-8, and NZ-12, a
novel rat-human chimeric anti-human podoplanin antibody derived from NZ-1, in an
MPM orthotopic xenograft SCID mouse model. Treatment with NZ-1 and rat NK
(CD161a(+) ) cells inhibited the growth of tumors and the production of pleural
effusion in NCI-H290/PDPN or NCI-H226 orthotopic xenograft mouse models. NZ-8 and
human natural killer (NK) (CD56(+) ) cells also inhibited tumor growth and
pleural effusion in MPM orthotopic xenograft mice. Furthermore, NZ-12 induced
potent ADCC mediated by human MNC, compared with either NZ-1 or NZ-8. Antitumor
effects were observed following treatment with NZ-12 and human NK (CD56(+) )
cells in MPM orthotopic xenograft mice. In addition, combined immunotherapy using
the ADCC activity of NZ-12 mediated by human NK (CD56(+) ) cells with pemetrexed,
led to enhanced antitumor effects in MPM orthotopic xenograft mice. These results
strongly suggest that combination therapy with podoplanin-targeting immunotherapy
using both NZ-12 and pemetrexed might provide an efficacious therapeutic strategy
for the treatment of MPM.