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Lactational exposure to dioxin-like polychlorinated biphenyl 169 and nondioxin-like polychlorinated biphenyl 155 : effects on rat femur growth, biomechanics and mineral composition
Brankovič, Jana (Author), Fazarinc, Gregor (Author), Antanasova, Maja (Author), Jevnikar, Peter (Author), Jan, Janja (Author), Anders, Ines (Author), Pavšič Vrtač, Katarina (Author), Jakovac-Strajn, Breda (Author), Antolinc, David (Author), Vrecl, Milka (Author)

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Abstract
Exposure to polychlorinated biphenyls (PCBs), which are persistent lipophilic environmental pollutants, has a variety of adverse effects on wildlife and human health, including bone mineralization, growth and mechanical strength. The present study evaluated the effects of lactational exposure to nondioxin-like PCB-155 and dioxin-like PCB-169, individually and in combination, on pubertal rat femur development and its biomechanics. After offspring delivery, Wistar rat mothers were divided into four groups, i.e., PCB-169, PCB-155, PCB-155+169 and control, and were administered PCBs intraperitoneally. Data on bone geometry, biomechanics and mineral composition were obtained by analysis of femurs from 42-day-old offspring by microCT scanning, three-point bending test and inductively coupled plasma mass spectrometry. Decreased somatic mass and femur size, i.e., mass, periosteal circumference and cross sectional area, were observed in the PCB-169 and PCB-155 groups. Additionally, lactational exposure to planar PCB-169 resulted in harder and more brittle bones containing higher amounts of minerals. Combined exposure to structurally and functionally different PCBs demonstrated only mild alterations in bone width and mineralization. To conclude, our results demonstrated that alterations, observed on postnatal day 42, were primarily induced by PCB-169, while toxicity from both of the individual congeners may have been reduced in the combined group.

Language:English
Keywords:polychlorinated biphenyls, bone, biochemical parameters, geometry, biomechanics, rats
Work type:Article (dk_c)
Tipology:1.01 - Original Scientific Article
Organization:VF - Veterinary Faculty
Year:2019
Publisher:Academic Press
Number of pages:str. 106-113
Numbering:Vol. 180
UDC:611
ISSN on article:0147-6513
DOI:10.1016/j.ecoenv.2019.04.076 Link is opened in a new window
COBISS.SI-ID:4812666 Link is opened in a new window
Copyright:založnik
License:CC BY-NC-ND 4.0
This work is available under this license: Creative Commons Attribution Non-Commercial No Derivatives 4.0 International
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Record is a part of a journal

Title:Ecotoxicology and environmental safety
Shortened title:Ecotoxicol. environ. saf.
Publisher:Academic Press.
ISSN:0147-6513
COBISS.SI-ID:25368320 This link opens in a new window

Document is financed by a project

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project no.:P4-0053, P3-0374
Name:Endokrini, imunski in encimski odzivi pri zdravih in bolnih živalih; Trajnostno kmetijstvo

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