Document Detail


Transfer of various polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDDs and PCDFs) via placenta and through milk in a marmoset monkey.
MedLine Citation:
PMID:  2128593     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A defined mixture of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDDs and PCDFs) was subcutaneously administered to a pregnant marmoset monkey (Callithrix jacchus) 11 weeks prior to delivery. Transfer of PCDDs and PCDFs via placenta and mother's milk was investigated by measurement of concentrations in a newborn 1 day after birth and in an infant of the same litter after a lactation period of 33 days. Furthermore, comparative measurements were performed in different tissues of the mother at the end of the lactation period, and in addition, in two groups of four adult monkeys each 1 and 6 weeks after treatment. Deposition of the PCDDs and PCDFs into fetal liver was very low for most of the 2,3,7,8-substituted congeners. Highest deposition was observed for 2,3,7,8-T4CDD and 1,2,3,7,8-P5CDD. For all other compounds concentrations in the hepatic tissue of newborn shortly after birth were lower than one tenth of corresponding concentrations in adults. Especially for PCDFs, prenatal deposition in fetal liver was extremely low. Fetal liver is apparently largely unable to accumulate PCDDs/PCDFs. In contrast to liver, concentrations of 2,3,7,8-substituted PCDDs/PCDFs in adipose tissue of the newborn were at least one third of the levels in adults. However, concentrations of OCDD and OCDF were about three times higher in the newborn than in adult adipose tissue. Transfer of some of the 2,3,7,8-substituted PCDDs and PCDFs to the offspring via mother's milk was considerable, leading to hepatic concentrations in the suckled infant at the end of the 33-day nursing period well above corresponding concentrations in the dam. When hepatic concentrations in the infant and dam were compared 2- to 4-fold higher concentrations were found in the infant's liver for 2,3,7,8-T4CDD/F and for 1,2,3,7,8-P5CDD. In the case of the 2,3,7,8-substituted H6CDDs, P5CDFs, and most of the H6CDFs, hepatic concentrations in the infant and dam were in the same range at the end of the suckling period. In contrast to this, less than one tenth the concentration of OCDD was found in the infant's liver when compared with adult liver. A corresponding phenomenon was observed for PCDFs. At the maximum absorption, 1 week after injection, for almost all 2,3,7,8-substituted congeners highest concentrations were measured in hepatic tissue of adult monkeys. This is especially true for those substances with six and more chlorine atoms. Besides adipose tissue, comparatively high levels were found in thymus and also in lung tissue.(ABSTRACT TRUNCATED AT 400 WORDS)
Authors:
H Hagenmaier; T Wiesmüller; G Golor; R Krowke; H Helge; D Neubert
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Archives of toxicology     Volume:  64     ISSN:  0340-5761     ISO Abbreviation:  Arch. Toxicol.     Publication Date:  1990  
Date Detail:
Created Date:  1991-05-28     Completed Date:  1991-05-28     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0417615     Medline TA:  Arch Toxicol     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  601-15     Citation Subset:  IM    
Affiliation:
Institut für Organische Chemie, Universität Tübingen.
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MeSH Terms
Descriptor/Qualifier:
Animals
Benzofurans / pharmacokinetics*
Callitrichinae
Female
Male
Maternal-Fetal Exchange*
Milk / metabolism*
Placenta / metabolism*
Pregnancy
Tetrachlorodibenzodioxin / analogs & derivatives*,  pharmacokinetics*
Tissue Distribution
Chemical
Reg. No./Substance:
0/Benzofurans; 0/chlorinated dibenzofurans; 0/polychlorodibenzo-4-dioxin; 1746-01-6/Tetrachlorodibenzodioxin; 40321-76-4/1,2,3,7,8-pentachlorodibenzo-p-dioxin
Comments/Corrections
Erratum In:
Arch Toxicol 1991;65(3):262

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