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2016 ; 5
(1
): 71-7
Nephropedia Template TP
gab.com Text
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English Wikipedia
Second-line therapy for small cell lung cancer: exploring the potential role of
circulating tumor cells
#MMPMID26958494
Hamilton G
; Rath B
; Holzer S
; Hochmair M
Transl Lung Cancer Res
2016[Feb]; 5
(1
): 71-7
PMID26958494
show ga
BACKGROUND: Small cell lung cancer (SCLC) is an aggressive and invasive variant
of lung tumors. SCLC, especially in advanced stages, is distinguished by
extremely high numbers of circulating tumor cells (CTCs) in comparison to other
malignancies. CTCs are operative in tumor spread and are currently enumerated to
assess prognosis and response to cytotoxic therapy. Chemosensitivity of SCLC CTCs
compared to primary tumors and metastases is not known. METHODS: Establishment of
two SCLC CTC cell lines, namely BHGc7 and BHGc10, allowed the in vitro
characterization of their chemosensitivity to the second-line chemotherapeutics
topotecan and epirubicin in comparison to a range of SCLC cell lines. RESULTS:
The SCLC CTC cell lines exhibited an approximately 7- and 12-fold increased
chemosensitivity to epirubicin compared to topotecan, respectively, in in vitro
cytotoxicity assays. In comparison to a panel of six SCLC cell lines, the two CTC
lines showed a significantly higher chemosensitivity to epirubicin (range, 3- to
16-fold) and topotecan (range, 2.2- to 14.4-fold), respectively. CONCLUSIONS: CTC
cell lines derived from SCLC patients with recurrent disease exhibit high
chemosensitivity to epirubicin vs. topotecan and show considerable more
cytotoxicity in response to both compounds in comparison to a panel of SCLC cell
lines. Thus, a decrease in the number of CTCs in response to second-line
chemotherapy in SCLC patients may overestimate the effect on resident SCLC
lesions and metastases.