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2016 ; 12
(1
): 41-48
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Biological characteristics of side population cells in a self-established human
ovarian cancer cell line
#MMPMID27347097
Wei Z
; Lv S
; Wang Y
; Sun M
; Chi G
; Guo J
; Song P
; Fu X
; Zhang S
; Li Y
Oncol Lett
2016[Jul]; 12
(1
): 41-48
PMID27347097
show ga
The aim of the present study was to establish an ovarian cancer (OC) cell line
from ascites of an ovarian serous cystadenocarcinoma patient and investigate the
biological characteristics of its side population (SP) cells. The OC cell line
was established by isolating, purifying and subculturing primary cells from
ascites of an ovarian serous cystadenocarcinoma patient (stage IIIc; grade 3). SP
and non-SP (NSP) cells were isolated by fluorescence-activated cell sorting and
cultured in serum-free medium and soft agar to compare the tumorsphere and colony
formation capacities. Furthermore, SP and NSP cell tumorigenesis was examined by
subcutaneous and intraperitoneal injection of the cells to non-obese
diabetic/severe combined immune deficiency (NOD/SCID) mice. Drug resistance to
cisplatin was examined by cell counting kit-8. The OC cell line was successfully
established from ascites of an ovarian serous cystadenocarcinoma patient, which
exhibited properties similar to primary tumors subsequent to >50 passages and >2
years of culture. The SP cell ratio was 0.38% in the OC cell line, and a similar
SP cell ratio (0.39%) was observed when sorted SP cells were cultured for 3
weeks. Compared with NSP cells, SP cells exhibited increased abilities in
differentiation and tumorsphere and colony formation, in addition to the
formation of xenografted tumors and ascites and metastasis of the tumors in
NOD/SCID mice, even at low cell numbers (3.0×10(3) cells). The xenografted tumors
demonstrated histological features similar to primary tumors and expressed the
ovarian serous cystadenocarcinoma marker CA125. In addition, SP cells
demonstrated a significantly stronger drug resistance to cisplatin compared with
NSP and unsorted cells, while treatment with verapamil, an inhibitor of
ATP-binding cassette transporters, potently abrogated SP cell drug resistance. In
conclusion, the present study verified SP cells from an established OC cell line
and characterized the cells with self-renewal, differentiation, proliferation,
tumorigenesis and stronger drug resistance capacities.