Li J, Chen S, Li W, Yang G, Zhu W. Toxicity of extracts from disposable chopsticks, toothpicks, and paper cups on L-929 cells.
Can J Physiol Pharmacol 2014;
93:223-6. [PMID:
25494822 DOI:
10.1139/cjpp-2014-0283]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE
To evaluate the toxicity of extracts from disposable chopsticks, toothpicks, and paper cups on L-929 cells.
METHODS
We followed national standards to prepare the extracts from disposable chopsticks, toothpicks, and paper cups used for the cell culture media, and the morphology of L-929 cells was observed with an optical microscope. The loss rate for adherent cells was evaluated with the trypan blue exclusion method, and cell proliferation was determined using the WST-1 assay.
RESULTS
Compared with the control group, the cells cultured in media containing the extracts showed signs of apoptosis and necrosis after culturing for 4 or 7 days, and the loss rate for adherent cells was significantly increased (P < 0.05). An obvious decrease in cell viability was also observed (P < 0.05).
CONCLUSION
The extracts from disposable chopsticks, toothpicks, and paper cups can affect the growth and proliferation of L-929 cells and are potentially toxic to humans.
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