Toxicity and molecular effects of di-n-butyl phthalate (DBP) on CYP1A Pakistan

  • Toxicity and molecular effects of di-n-butyl phthalate (DBP) on CYP1A Pakistan
  • Toxicity and molecular effects of di-n-butyl phthalate (DBP) on CYP1A Pakistan
  • Toxicity and molecular effects of di-n-butyl phthalate (DBP) on CYP1A Pakistan
  • Why is di n -butyl phthalate toxic?
  • A susceptible population will exhibit a different or enhanced response to di- n -butyl phthalate than will most persons exposed to the same level of di- n -butyl phthalate in the environment. Reasons may include genetic makeup, age, health and nutritional status, and exposure to other toxic substances (e.g., cigarette smoke).
  • Does di n -butyl phthalate cause respiratory effects?
  • Information on the potential of di- n -butyl phthalate to induce respiratory effects is limited to a study by Kawano (1980a), which found an increase in relative lung weight in rats exposed to 50 mg/m 3 di- n -butyl phthalate 6 hours/day for 6 months ( Kawano 1980a ); lung weight was not altered in the 0.5 mg/m 3 group.
  • How dangerous is di-n-butyl phthalate?
  • Di- n -butyl phthalate has low acute toxicity in animals. Single doses of 8,000 mg/kg killed four of nine rats in one study ( Smith 1953 ), but other studies indicate the acute oral LD 50 in rats and mice is in excess of 20,000 mg/kg ( Hardin et al. 1987; White et al. 1983 ).
  • Does di-n-butyl phthalate cause hypertension?
  • Hypertension was reported in workers exposed to di- n -butyl phthalate for 0.5–19 years at concentrations of 1.7–66 mg/m 3; the frequency increased with length of employment ( Milkov et al. 1973 ). These workers were also exposed to other plasticizers, so the effects seen may not have been caused by di- n -butyl phthalate exposure.
  • Does di-n-butyl phthalate affect body weight?
  • Body Weight Effects. Several studies have evaluated the effect of oral exposure of animals to di- n -butyl phthalate on body weight ( BIBRA 1986; Gray et al. 1982; Lamb et al. 1987; Murakami et al. 1986, 1986b; Nikonorow et al. 1973; NTP 1984, 1995; Oishi and Hiraga 1980a; Smith 1953 ).
  • Does di-n-butyl phthalate affect the liver?
  • Systemic, reproductive, and developmental effects have been observed in animals following oral exposure. The liver appears to be the most sensitive systemic target in rats and mice exposed to di- n -butyl phthalate in the diet for 13 weeks ( NTP 1995; Schilling et al. 1992 ).

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