A survey on health effects in a human population exposed to permanent-waving solution containing thioglycolic acid.

Abstract:

:Thioglycolic acid (TGA) is the active ingredient of permanent-waving solution (PWS). TGA has been shown to be a chemical of high toxicity, which can be absorbed through intact skin and cause damage to organs or systems in animals. This study evaluated the effect of TGA-containing PWS on the health of a human population in 3 substudies. Firstly, 57 female hairdressers exposed to TGA-containing PWS (cases) and 64 female schoolteachers (controls) were studied. Their menstruation state was evaluated with information obtained from interviews. The results revealed that the menoxenia rate in the cases was significantly higher than that in the controls (22.81% vs 9.38%, p<0.05). Secondly, 8 female hairdressers selected from those that participated in the above survey underwent a fluctuation test for the mutagenic activity of urine. Eight female medical students were chosen as controls. Difference in the mutagenic activity of urine on TA100 between the two groups was highly significant (110.30 +/- 45.95 vs 28.43 +/- 19.33, p<0.01). Finally, a micronucleus assay was carried out on scalp hair follicle cells in healthy volunteers. Scalp hair with the follicle cell mass was sampled from 8 male and 8 female volunteers before permanent waving and at 24, 48 and 72 h after waving. One thousand hair follicle cells were examined by light microscopy. The number of cells containing a micronucleus and the number of micronuclei in each cell was determined. The permillages of micronuclei in hair follicle cells before and after permanent waving were compared. Micronuclei presence reached its peak value (12.44) 24 h after permanent waving, which was significantly higher than that before waving (3.13, p<0.001). The rate decreased progressively after 24 h. Our results suggest that the reproductive function of hairdressers may be affected by long-term exposure to PWS, probably due to the presence of TGA, and more attention should be paid to its potential carcinogenic effects.

journal_name

J Occup Health

authors

Gan HF,Meng XS,Song CH,Li BX

doi

10.1539/joh.45.400

subject

Has Abstract

pub_date

2003-11-01 00:00:00

pages

400-4

issue

6

eissn

1341-9145

issn

1348-9585

journal_volume

45

pub_type

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