title: Hypothyroidism protects di(n-butyl) phthalate-induced reproductive organs damage in Sprague-Dawley male rats.
abstract: This study examined the deleterious effects of di(n-butyl) phthalate (DBP) on the male reproductive organs in hypothyroid rats. Hypothyroidism was induced in prepubertal male rats (28 days of age) by an intraperitonial (i.p.) injection of 10 mg/kg/day propylthiouracil (PTU) for 30 days. DBP (100 and 500 mg/kg/day) was administered by oral gavages to the intact or hypothyroid rats for 30 days. The body weight of the PTU-treated rats was significantly lower than the control group. The total triiodothyronine (T3) and thyroxine (T4) serum level was lower, and the thyroid-stimulating hormone (TSH) level was higher in the hypothyroid rats than in the control rats. The DBP treatment rats showed significantly lower testes, epididymides, seminal vesicles, and ventral prostate weights than the untreated rats. The hypothyroid rats had significantly higher thyroid weights and lower adrenal glands weights than the control rats. The histomorphological examination showed diffused Leydig cells hyperplasias and germ cells loss in the DBP (500 mg/kg)-treated rats, whereas these effects were mild in the DBP-treated hypothyroid rats. The serum levels of monobutyl phthalate (MBP) were significantly lower in PTU-induced hypothyroid rats than in the DBP-treated rats. This data suggests that the hypothyroid status might offer some protection from male reproductive organ toxicity caused by a disturbance in the metabolic activation of the parent compound, DBP.
authors.affiliation: College of Pharmacy, Pusan National University, Busan, Korea.
authors.forename: Ena
authors.initials: E
authors.lastname: Lee
authors.forename: Hee Jin
authors.initials: HJ
authors.lastname: Kim
authors.forename: Ji Young
authors.initials: JY
authors.lastname: Im
authors.forename: Jeonga
authors.initials: J
authors.lastname: Kim
authors.forename: Hyeyoung
authors.initials: H
authors.lastname: Park
authors.forename: Ju Young
authors.initials: JY
authors.lastname: Ryu
authors.forename: Jaewon
authors.initials: J
authors.lastname: Lee
authors.forename: Keun Aee
authors.initials: KA
authors.lastname: Shim
authors.forename: Kee Kyung
authors.initials: KK
authors.lastname: Jung
authors.forename: Soon Young
authors.initials: SY
authors.lastname: Han
authors.forename: Byung Mu
authors.initials: BM
authors.lastname: Lee
authors.forename: Seung Hee
authors.initials: SH
authors.lastname: Kim
authors.forename: Hyung Sik
authors.initials: HS
authors.lastname: Kim
mesh_terms: D000818:Animals; D001835:Body Weight / Q000187:drug effects; D003993:Dibutyl Phthalate / Q000378:metabolism / Q000633:toxicity*; D007037:Hypothyroidism / Q000378:metabolism*; D008297:Male; D009929:Organ Size / Q000187:drug effects; D010795:Phthalic Acids / Q000097:blood; D011441:Propylthiouracil / Q000494:pharmacology; D051381:Rats; D017207:Rats, Sprague-Dawley; D013737:Testis / Q000187:drug effects* / Q000473:pathology; D013963:Thyroid Hormones / Q000097:blood; D013972:Thyrotropin / Q000097:blood
chemical_list: D010795:Phthalic Acids; D013963:Thyroid Hormones; D003993:Dibutyl Phthalate; D011441:Propylthiouracil; D013972:Thyrotropin; C028577:monobutyl phthalate