4 research outputs found

    Two generation reproductive and developmental toxicity following subchronic exposure of pubescent male mice to di(2-ethylhexyl)phthalate

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    Di-(2-ethylhexyl)phthalate (DEHP) is widely present in the human environment. The study aimed at the investigation of potential genotoxic effects induced by subchronic exposure to DEHP in germ cells of male mice in the first period of puberty, and to check if the transmission of mutation to the next generation via the sperm is possible. 8-weeks exposure to 2,000 mg/kg and 8,000 mg/kg of DEHP diminished sperm count and quality, leading to a reduced percentage of pregnant females mated to exposed males. A slight increase in the frequency of prenatal deaths and dominant lethal mutations, as well as a significantly increased percentage of abnormal skeletons among the F1 offspring of males exposed to 8,000 mg/kg of DEHP, were observed. Exposure of the fathers did not cause a delay in the postnatal development of the offspring, except for fur development in the group of 8,000 mg/kg of DEHP. Gametes of male offspring of exposed fathers showed reduced motility. The results may suggest that diminished spermaozoa quality induced by DEHP may be coincidental with mutations leading to intrauterine deaths and skeletal abnormalities in the offspring

    Wp艂yw ftalanu di-n-butylu na kom贸rki p艂ciowe myszy laboratoryjnych

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    Phthalate are found in the environmental samples due to their wide use in the industry as plasticizers. Di-n-butyl phthalate (DBP) is mainly used in nitrocellulose and polyvinyl acetate products as well as in personal-care products. This study was performed to investigate the influence of exposure to DBP on the quantity and quality (motility, morphology) and DNA damage (induction of micronuclei and DNA strand breaks) of male mice gametes. The estimation of DBP residues was also done. Eight weeks exposure to DBP (500 mg/kg bw and 2000 mg/kg bw) did not significantly affect testes and epididymes weights as well as sperm count. DBP clearly diminished sperm motility, enhanced frequency of abnormal sperm heads and not significantly increased DNA strand breaks in germ cells as well as frequency of micronuclei in spermatids. There were no bioacumulation of DBP in mice. Results suggest that DBP may affect the male mice germ cells.Ftalany s膮 powszechnie wykorzystywane w przemy艣le jako plastyfikatory, dlatego te偶 cz臋sto wyst臋puj膮 w pr贸bach 艣rodowiskowych. Ftalan di-n-butylu (DBP) jest sk艂adnikiem produkt贸w nitrocelulozowych i poliwinylowych, jak r贸wnie偶 produkt贸w do higieny osobistej. Celem pracy by艂o zbadanie wp艂ywu podawania DBP na ilo艣膰 i jako艣膰 gamet m臋skich myszy (ruchliwo艣膰, morfologia) oraz na wyst臋powanie uszkodze艅 DNA (indukcja mikroj膮der oraz p臋kni臋膰 nici DNA). Zbadano tak偶e st臋偶enie pozosta艂o艣ci DBP w gametach. O艣miotygodniowe nara偶anie na DBP (500 mg/kg mc i 2000 mg/kg mc) nie powodowa艂o istotnych zmian w ci臋偶arze j膮der i naj膮drzy ani w liczebno艣ci plemnik贸w. Nara偶enie na DBP, zw艂aszcza w dawce 2000 mg/kg mc wp艂ywa艂o wyra藕nie na zmniejszenie ruchliwo艣ci plemnik贸w i zwi臋kszenie odsetka plemnik贸w o nieprawid艂owej budowie morfologicznej. Powodowa艂o te偶 nieznaczne zwi臋kszenie p臋kni臋膰 nici DNA w gametach oraz zwi臋kszenie cz臋sto艣ci wyst臋powania mikroj膮der w spermatydach. Nie wykazano bioakumulacji DBP w gonadach samc贸w myszy. Uzyskane wyniki sugeruj膮, 偶e DBP mo偶e oddzia艂ywa膰 niekorzystnie na m臋skie kom贸rki rozrodcze myszy

    The effects of di-n-butyl phthalate on the somatic cells laboratory mice

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    Ftalany s膮 powszechnie stosowane przy produkcji tworzyw sztucznych oraz jako rozpuszczalniki w 艣rodkach higieny; w kosmetykach i preparatach farmaceutycznych. Ftalan dibutylu (DBP) stosowany jest jako plastyfikator, a tak偶e jako 艣rodek do impregnacji tekstyli贸w i jako rozpuszczalnik w farbach drukarskich. Celem bada艅 by艂a ocena uszkodze艅 DNA w kom贸rkach w膮troby i szpiku kostnego oraz ocena st臋偶enia DBP w krwi obwodowej w nast臋pstwie przed艂u偶onej ekspozycji na ftalan dibutylu. Badania wykonano na samcach myszy Pzh:Sfis. Zwierz臋ta otrzymywa艂y przez 8 tygodni, 3 razy w tygodniu, per os DBP w postaci zawiesiny w oleju jadalnym w dawkach 500 mg/kg m.c. (1/16 LD50) i 2000 mg/kg m.c. (1/4 LD50). Kolejne grupy myszy zabijano po 4 i 8 tygodniach od rozpocz臋cia podawania oraz po 4 tygodniach od jego zako艅czenia. Wykazano zmniejszenie masy cia艂a myszy, istotnie statystycznie obni偶enie masy w膮troby oraz relatywnej masy w膮troby w nast臋pstwie 8-tygodniowego podawania DBP w dawce 2000 mg/kg m.c. W tym samym czasie notowano wi臋kszy, cho膰 nieistotny statystycznie poziom uszkodze艅 DNA w kom贸rkach w膮troby mierzony testem kometowym. DBP nie indukowa艂o zwi臋kszonego powstawania uszkodze艅 DNA w kom贸rkach szpiku kostnego. W wyniku 8-tygodniowego podawania DBP w dawce 2000 mg/kg m.c. obserwowano znaczne podwy偶szenie st臋偶enia DBP we krwi obwodowej utrzymuj膮ce si臋 r贸wnie偶 po 4 tygodniach od zaprzestania podawania zwi膮zku. Wyniki bada艅 potwierdzi艂y, 偶e DBP jest s艂abym mutagenem w stosunku do DNA kom贸rek somatycznych. Wydaje si臋 jednak, 偶e zwi膮zek ten w nast臋pstwie przed艂u偶onej ekspozycji mo偶e by膰 wolniej metabolizowany i czasowo kumulowany w krwi obwodowej.Phthalates are widely used as a plasticizers in manufacture of synthetic materials and as solvents in sanitary products, cosmetics and pharmaceutical products. Dibutyl phthalate (DBP) is used as a plasticizers and as a textile lubricating agent and as solvent in printing ink. The study aimed the evaluation of the magnitude of DNA damage in liver and bone marrow cells and estimation of dibutyl phthalate (DBP) concentration in peripheral blood following prolonged exposure to DBP. Experiments were conducted on the Pzh:Sfis male mice. Animals were exposed 8 weeks, 3 days per week per os to DBP suspension in oil in doses of 500 mg/kg bw (1/16 LD50) and 2000 mg/kg bw (1/4 LD50). Following groups of mice were sacrificed 4 and 8 weeks after the start of exposure and 4 weeks after the end of exposure. Decreased body weight of mice and statistically significant decreased liver and relative liver weights were observed following 8-weeks exposure to 2000 mg/kg bw DBP. In the same time higher, however not statistically significant level of DNA damage measured by Comet assay in liver cells were noted. DBP did not induce enhanced frequency of DNA damage in bone marrow cells. Following 8-weeks exposure to the dose of 2000 mg/kg bw DBP the increased level of DBP in peripheral blood was observed. Enhanced levels of DBP were still noted 4 weeks after the termination of exposure. Results confirmed that DBP acts as a weak mutagen for DNA of somatic cells. However, following prolonged exposure this compound seems to undergo slower metabolism and was reaching temporarily higher levels in peripheral bloo
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