Abstract：
:Methoxy-, ethoxy- and n-butoxy acetic acids, known urinary metabolites of the corresponding alkoxyethanol solvents, were administered by gavage to rats as a single oral dose equimolar with 500, 250 or 100 mg 2-methoxyethanol/kg body weight. Testicular weight and morphology were monitored over a 14-day period post-treatment. Methoxyacetic acid (MAA) was the only compound which produced a significant decrease in testicular weight. Histological examination of the testes from treated animals indicated that MAA at all doses and ethoxyacetic acid (EAA) at the highest dose, produced damage specific to spermatocytes undergoing meiotic maturation and division (particularly stages XIII-XIV) within 24 h of treatment. n-Butoxyacetic acid (BAA) had no discernable effect on the testis at any dose level or time, although there was evidence of haematuria produced by the compound. Addition of MAA, EAA and BAA to testicular cell cultures at concentrations approximately equivalent to the steady state plasma levels of MAA determined after a testicular toxic dose (500 mg/kg) of methoxyethanol (5 mM) produced a specific loss of pachytene spermatocytes (the target population in vivo) from the system by MAA and EAA (MAA greater than EAA). BAA did not produce any specific changes to testicular cell populations in vitro. Thus the production of testicular toxicity by alkoxyacetic acids diminishes with increasing chain length, and a good correlation exists between in vivo and the in vitro system.
journal_name
Toxicologyjournal_title
Toxicologyauthors
Foster PM,Lloyd SC,Blackburn DMdoi
10.1016/0300-483x(87)90071-0subject
Has Abstractpub_date
1987-01-01 00:00:00pages
17-30issue
1eissn
0300-483Xissn
1879-3185pii
0300-483X(87)90071-0journal_volume
43pub_type
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