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Reproductive and developmental toxicity studies of toluene. II. Effects of inhalation exposure on fertility in rats. 1996

A Ono, and K Sekita, and Y Ogawa, and A Hirose, and S Suzuki, and M Saito, and K Naito, and T Kaneko, and T Furuya, and K Kawashima, and K Yasuhara, and K Matsumoto, and S Tanaka, and T Inoue, and Y Kurokawa
Division of Toxicology, National Institute of Health Sciences, Tokyo, Japan.

Male and female Sprague-Dawley rats were exposed to toluene vapor at 600 and 2000 ppm for 6 h/day, and effects on their fertility were investigated. Females were exposed from 14 days before mating until day 7 of gestation. Males were exposed for a total of 90 days, including the mating period; treatment was begun 60 days before pairing, and toxicity with respect to testicular and reproductive functions was examined. In females of the 2000 ppm-treated group, salivation and lacrimation that may have been caused by CNS depression were observed starting 20 days after exposure. Although no abnormalities were seen in mating behavior or fertility, fetal mortality and the number of dams with dead fetuses increased in the 2000 ppm group. In the males exposed to 2000 ppm toluene for 90 days, an increase in kidney weights and a decrease in thymus weights were observed. Basophilic changes and necrosis of kidney tubules were greater at the higher exposure level. Additionally, decreases in the weights of the epididymides and spermatic count were observed, indicating toxicity of toluene to the male reproductive system in vivo for the first time. In conclusion, embryo-fetal toxic effects were apparent in female rats exposed to toluene before and during the early stage of pregnancy. Subacute exposure to a high level (2000 ppm) of toluene vapor elicited mild toxic changes in the kidneys, thymus, and reproductive organs of males. Toxic effects on fertility and reproduction were thus demonstrated not only in females but also in males exposed to toluene vapor in the present study.

UI MeSH Term Description Entries
D008297 Male Males
D011247 Pregnancy The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH. Gestation,Pregnancies
D011297 Prenatal Exposure Delayed Effects The consequences of exposing the FETUS in utero to certain factors, such as NUTRITION PHYSIOLOGICAL PHENOMENA; PHYSIOLOGICAL STRESS; DRUGS; RADIATION; and other physical or chemical factors. These consequences are observed later in the offspring after BIRTH. Delayed Effects, Prenatal Exposure,Late Effects, Prenatal Exposure
D012098 Reproduction The total process by which organisms produce offspring. (Stedman, 25th ed) Human Reproductive Index,Human Reproductive Indexes,Reproductive Period,Human Reproductive Indices,Index, Human Reproductive,Indexes, Human Reproductive,Indices, Human Reproductive,Period, Reproductive,Periods, Reproductive,Reproductive Index, Human,Reproductive Indices, Human,Reproductive Periods
D005260 Female Females
D005298 Fertility The capacity to conceive or to induce conception. It may refer to either the male or female. Fecundity,Below Replacement Fertility,Differential Fertility,Fecundability,Fertility Determinants,Fertility Incentives,Fertility Preferences,Fertility, Below Replacement,Marital Fertility,Natural Fertility,Subfecundity,World Fertility Survey,Determinant, Fertility,Determinants, Fertility,Fertility Determinant,Fertility Incentive,Fertility Preference,Fertility Survey, World,Fertility Surveys, World,Fertility, Differential,Fertility, Marital,Fertility, Natural,Preference, Fertility,Preferences, Fertility,Survey, World Fertility,Surveys, World Fertility,World Fertility Surveys
D005313 Fetal Death Death of the developing young in utero. BIRTH of a dead FETUS is STILLBIRTH. Fetal Mummification,Fetal Demise,Death, Fetal,Deaths, Fetal,Demise, Fetal,Fetal Deaths,Mummification, Fetal
D005314 Embryonic and Fetal Development Morphological and physiological development of EMBRYOS or FETUSES. Embryo and Fetal Development,Prenatal Programming,Programming, Prenatal
D000280 Administration, Inhalation The administration of drugs by the respiratory route. It includes insufflation into the respiratory tract. Drug Administration, Inhalation,Drug Administration, Respiratory,Drug Aerosol Therapy,Inhalation Drug Administration,Inhalation of Drugs,Respiratory Drug Administration,Aerosol Drug Therapy,Aerosol Therapy, Drug,Drug Therapy, Aerosol,Inhalation Administration,Administration, Inhalation Drug,Administration, Respiratory Drug,Therapy, Aerosol Drug,Therapy, Drug Aerosol
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia

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