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2014 ; 15
(9
): 1208-18
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
A human monoclonal antibody targeting the stem cell factor receptor (c-Kit)
blocks tumor cell signaling and inhibits tumor growth
#MMPMID24921944
Lebron MB
; Brennan L
; Damoci CB
; Prewett MC
; O'Mahony M
; Duignan IJ
; Credille KM
; DeLigio JT
; Starodubtseva M
; Amatulli M
; Zhang Y
; Schwartz KD
; Burtrum D
; Balderes P
; Persaud K
; Surguladze D
; Loizos N
; Paz K
; Kotanides H
Cancer Biol Ther
2014[Sep]; 15
(9
): 1208-18
PMID24921944
show ga
Stem cell factor receptor (c-Kit) exerts multiple biological effects on target
cells upon binding its ligand stem cell factor (SCF). Aberrant activation of
c-Kit results in dysregulated signaling and is implicated in the pathogenesis of
numerous cancers. The development of more specific and effective c-Kit therapies
is warranted given its essential role in tumorigenesis. In this study, we
describe the biological properties of CK6, a fully human IgG1 monoclonal antibody
against the extracellular region of human c-Kit. CK6 specifically binds c-Kit
receptor with high affinity (EC 50 = 0.06 nM) and strongly blocks its interaction
with SCF (IC 50 = 0.41 nM) in solid phase assays. Flow cytometry shows CK6
binding to c-Kit on the cell surface of human small cell lung carcinoma (SCLC),
melanoma, and leukemia tumor cell lines. Furthermore, exposure to CK6 inhibits
SCF stimulation of c-Kit tyrosine kinase activity and downstream signaling
pathways such as mitogen-activated protein kinase (MAPK) and protein kinase B
(AKT), in addition to reducing tumor cell line growth in vitro. CK6 treatment
significantly decreases human xenograft tumor growth in NCI-H526 SCLC (T/C% = 57)
and Malme-3M melanoma (T/C% = 58) models in vivo. The combination of CK6 with
standard of care chemotherapy agents, cisplatin and etoposide for SCLC or
dacarbazine for melanoma, more potently reduces tumor growth (SCLC T/C% = 24,
melanoma T/C% = 38) compared with CK6 or chemotherapy alone. In summary, our
results demonstrate that CK6 is a c-Kit antagonist antibody with tumor growth
neutralizing properties and are highly suggestive of potential therapeutic
application in treating human malignancies harboring c-Kit receptor.
|Animals
[MESH]
|Antibodies, Monoclonal/administration & dosage/pharmacology/*therapeutic use
[MESH]
|Antineoplastic Combined Chemotherapy Protocols/therapeutic use
[MESH]
|Cell Line, Tumor
[MESH]
|Cell Proliferation/drug effects
[MESH]
|Cisplatin/administration & dosage
[MESH]
|Dacarbazine/administration & dosage
[MESH]
|Etoposide/administration & dosage
[MESH]
|Female
[MESH]
|Heterografts
[MESH]
|Humans
[MESH]
|Immunoglobulin G/administration & dosage/pharmacology/*therapeutic use
[MESH]