4.7 Article

Toxicokinetic studies of di-isobutyl phthalate focusing on the exploration of gender differences in rats

期刊

CHEMOSPHERE
卷 286, 期 -, 页码 -

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PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2021.131706

关键词

Di-isobutyl phthalate; Mono-isobutyl phthalate; Toxicokinetics; Gender differences; Subacute toxicity

资金

  1. Ministry of Food and Drug Safety, Republic of Korea [17162MFDS117]
  2. Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [2020R1A6A3A13074075]
  3. National Research Foundation of Korea [2020R1A6A3A13074075] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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This study investigated the subacute toxicity and toxicokinetics of DiBP in male and female rats, finding that 100 mg/kg of DiBP led to modest toxicity in the liver, kidney, lung, and testis, with minimal differences in toxicokinetics between genders. The metabolism of DiBP to MiBP was significant in both male and female rats, with MiBP excretion in urine serving as a major indicator of DiBP exposure.
Due to the use of di-isobutyl-phthalate (DiBP) in the production of soft-polyvinyl chloride articles, it is currently a hazardous substance prevalent in human daily life. However, reports on DiBP's toxicokinetics are still very scarce. And no studies have been reported on gender differences in DiBP toxicokinetics. Therefore, this study was conducted in accordance with these research needs. DiBP of 100 mg/kg has been exposed to male and female rats single or multiple times. DiBP and its major metabolite, mono-isobutyl-phthalate (MiBP), were quantified from various biological samples obtained from rats administered with DiBP. Based on these results, several toxicokinetic parameters were estimated. Toxicokinetic results between genders were compared, and from this, existence and extent of gender differences in DiBP's toxicokinetics were explored. Investigation of presence and extent of subacute toxicity in male and female rats following multiple exposures to DiBP were also conducted. This study provided comprehensive information on DiBP toxicity and gender differences that have not been reported in detail. Results of these studies imply that subacute toxicity in liver, kidney, lung, and testis of rats at 100 mg/kg of DiBP is modest and that there is little difference in toxicokinetics between genders. And in both male and female rats, the metabolism of DiBP (to MiBP) was significant, and excretion of MiBP into urine was a major indicator of DiBP exposure.

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