OBSERVATIONS ON THE EFFECTS OF METHANOL AND FORMALDEHYDE ON ESTABLISHED CELL LINES CULTIVATED IN VITRO

1963 ◽  
Vol 41 (2) ◽  
pp. 299-304 ◽  
Author(s):  
Alice Elliott ◽  
Donald M. Pace

Short-term experiments were used to investigate the effects of various concentrations of methanol and formaldehyde upon cells grown in vitro. Mouse liver epithelial, HeLa, human lung, and skin cells were exposed to several concentrations of methanol. The same cell lines, except HeLa, were subjected to different concentrations of formaldehyde.Relatively high concentrations of methanol were required to produce rapid toxic effects. Not all cell lines responded alike to methanol. Concentrations of 15 mg/ml were decidedly inhibitory in case of human skin, lung, and HeLa cells. This concentration, however, appeared to enhance growth in liver cells. At higher concentrations the methanol was toxic to liver cells as well as to the others.Concentrations of formaldehyde greater than 0.035 mg/ml were toxic to mouse liver, human lung and skin cells. A concentration of 0.01 mg/ml of formaldehyde inhibited proliferation of these same cells. These three cell lines did not appear to differ significantly in respect to their sensitivity to formaldehyde. Of the substances investigated to date, formaldehyde appears to be the most toxic.

1963 ◽  
Vol 41 (1) ◽  
pp. 299-304
Author(s):  
Alice Elliott ◽  
Donald M. Pace

Short-term experiments were used to investigate the effects of various concentrations of methanol and formaldehyde upon cells grown in vitro. Mouse liver epithelial, HeLa, human lung, and skin cells were exposed to several concentrations of methanol. The same cell lines, except HeLa, were subjected to different concentrations of formaldehyde.Relatively high concentrations of methanol were required to produce rapid toxic effects. Not all cell lines responded alike to methanol. Concentrations of 15 mg/ml were decidedly inhibitory in case of human skin, lung, and HeLa cells. This concentration, however, appeared to enhance growth in liver cells. At higher concentrations the methanol was toxic to liver cells as well as to the others.Concentrations of formaldehyde greater than 0.035 mg/ml were toxic to mouse liver, human lung and skin cells. A concentration of 0.01 mg/ml of formaldehyde inhibited proliferation of these same cells. These three cell lines did not appear to differ significantly in respect to their sensitivity to formaldehyde. Of the substances investigated to date, formaldehyde appears to be the most toxic.


1967 ◽  
Vol 45 (1) ◽  
pp. 81-88 ◽  
Author(s):  
Donald M. Pace ◽  
Byron Th. Aftonomos ◽  
Alice Elliott ◽  
Steven Sommer

There appears to be very little information in the literature pertaining to concentrations of various air pollutants or tobacco-smoke constituents that may be toxic or nontoxic to tissue cells cultivated in vitro. We have undertaken the task of ascertaining these levels and this report records observations concerning the first few of many known pollutants.The effects of the sodium salts of 10 monocarboxylic acids (formate, acetate, propionate, butyrate, valerate, caproate, oenanthylate, caprylate, caprate, and benzoate) on several established cell lines (HeLa, strain L, human lung, human skin) were studied.All of these compounds at a concentration of 10 mg% were toxic to the cell lines tested with the exceptions of formate, acetate, and benzoate on strain L, and of valerate and caprylate on human lung.All the compounds either stimulated proliferation or had no significant effect at 1 mg% except caproate and benzoate, which were toxic to human lung and human skin cells, respectively.


1962 ◽  
Vol 40 (2) ◽  
pp. 207-217 ◽  
Author(s):  
James R. Thompson ◽  
Donald M. Pace

Studies have been made on the effects of SO2 and its salts on strain L, mouse liver, and HeLa cells. Of the cell lines tested, the HeLa cells seemed to be more sensitive to SO2 and its salts than the cells of mouse origin.Cells cultivated in "biological" medium grow in concentrations of gaseous SO2 up to 2000 p.p.m., although somewhat inhibited. Cells subjected to a concentration of 500 p.p.m. in this medium are not affected greatly and their growth is comparable to those cells in control cultures.The addition of various salts of SO2 (Na2SO4, Na2SO3, and NaHSO3) in concentrations from 10 to 200 mg% produced responses ranging from complete inhibition of growth (by 200 mg% NaHSO3) to apparent stimulation of growth by some concentrations of Na2SO4. Toxicity of these salts was in the order of NaHSO3 > Na2SO3 > Na2SO4.When cells in vitro are directly exposed to SO2 in specially designed culture flasks, strain L cells are apparently able to tolerate 5 p.p.m. SO2 for five 8-hour exposure intervals, provided a "recovery" period follows each exposure.Certain components of serum seem to play a very important role as protective agents in modifying the effect of gaseous SO2, possibly by combination.


1962 ◽  
Vol 40 (1) ◽  
pp. 207-217 ◽  
Author(s):  
James R. Thompson ◽  
Donald M. Pace

Studies have been made on the effects of SO2 and its salts on strain L, mouse liver, and HeLa cells. Of the cell lines tested, the HeLa cells seemed to be more sensitive to SO2 and its salts than the cells of mouse origin.Cells cultivated in "biological" medium grow in concentrations of gaseous SO2 up to 2000 p.p.m., although somewhat inhibited. Cells subjected to a concentration of 500 p.p.m. in this medium are not affected greatly and their growth is comparable to those cells in control cultures.The addition of various salts of SO2 (Na2SO4, Na2SO3, and NaHSO3) in concentrations from 10 to 200 mg% produced responses ranging from complete inhibition of growth (by 200 mg% NaHSO3) to apparent stimulation of growth by some concentrations of Na2SO4. Toxicity of these salts was in the order of NaHSO3 > Na2SO3 > Na2SO4.When cells in vitro are directly exposed to SO2 in specially designed culture flasks, strain L cells are apparently able to tolerate 5 p.p.m. SO2 for five 8-hour exposure intervals, provided a "recovery" period follows each exposure.Certain components of serum seem to play a very important role as protective agents in modifying the effect of gaseous SO2, possibly by combination.


Nature ◽  
1974 ◽  
Vol 247 (5441) ◽  
pp. 466-469 ◽  
Author(s):  
P. AMATI ◽  
C. LAGO

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