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2014 ; 48
(21
): 12912-9
Nephropedia Template TP
gab.com Text
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English Wikipedia
Appalachian mountaintop mining particulate matter induces neoplastic
transformation of human bronchial epithelial cells and promotes tumor formation
#MMPMID25347054
Luanpitpong S
; Chen M
; Knuckles T
; Wen S
; Luo J
; Ellis E
; Hendryx M
; Rojanasakul Y
Environ Sci Technol
2014[Nov]; 48
(21
): 12912-9
PMID25347054
show ga
Epidemiological studies suggest that living near mountaintop coal mining (MTM)
activities is one of the contributing factors for high lung cancer incidence. The
purpose of this study was to investigate the long-term carcinogenic potential of
MTM particulate matter (PMMTM) exposure on human bronchial epithelial cells. Our
results show that chronic exposure (3 months) to noncytotoxic, physiological
relevant concentration (1 ?g/mL) of PMMTM, but not control particle PMCON,
induced neoplastic transformation, accelerated cell proliferation, and enhanced
cell migration of the exposed lung cells. Xenograft transplantation of the
PMMTM-exposed cells in mice caused no apparent tumor formation, but promoted
tumor growth of human lung carcinoma H460 cells, suggesting the tumor-promoting
effect of PMMTM. Chronic exposure to the main inorganic chemical constituent of
PMMTM, molybdenum but not silica, similarly induced cell transformation and tumor
promotion, suggesting the contribution of molybdenum, at least in part, in the
PMMTM effects. These results provide new evidence for the carcinogenic potential
of PMMTM and support further risk assessment and implementation of exposure
control for PMMTM.