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Treatment with Lead Chloride During Pregnancy and the Postnatal Period Alters Cell Proliferation and Immune Function in Swiss Albino Mice

  • Sana Ajouaoi
  • Najat Bouchmaa
  • Abderrazak Idir
  • Oissim Mernari
  • Hassan Ait Mouse
  • Abdelmajid ZyadEmail author
Article
  • 35 Downloads

Abstract

In the current study, we investigated the effect of lead chloride (PbCl2) administration (50 and 100 ppm) on organ and body weight as well as its bioaccumulation during pregnancy and the postnatal period in mice. We showed that lead has no effect on the body weight of mice. However, spleen weight is affected by the two doses of PbCl2 while liver and kidney weights are altered only by the 100-ppm dose. Inductively coupled plasma atomic emission spectrometry (ICP-AES) analysis showed that lead accumulates in the blood, spleen, and thymus. Both doses of PbCl2 significantly reduced splenocyte and thymocyte cell counts after stimulation with lipopolysaccharide (LPS) and phytohemagglutinin A (PHA), respectively. On the other hand, we showed that the levels of Th1 cytokines (interleukin-2 (IL-2), interferon gamma (IFN-γ)), and tumor necrosis factor alpha (TNF-α) were reduced in the serum of mice treated with PbCl2 in a dose-dependent manner, as measured by ELISA. The levels of interleukin-4 (IL-4) and interleukin-10 (IL-10) were very low in untreated mice and were also reduced by treatment with PbCl2. The levels of IL-2, IFN-γ, IL-4, IL-10, and TNF-α secretion differentially decreased in LPS-stimulated splenocytes in lead-treated mice. Using PHA-stimulated thymocytes, we observed a reduction in the levels of IL-2, IL-4, IL-10, and TNF-α in the PbCl2-treated groups. However, IFN-γ concentration in the supernatant of these cells was not decreased when mice were treated with 50 ppm of lead.

Keywords

PbCl2 Immunomodulation Cell proliferation Th1/Th2 balance Cytokines ELISA sandwich 

Abbreviations

PbCl2

Lead(II) chloride

LPS

Lipopolysaccharide

PHA

Phytohemagglutinin A

IL-2

Interleukin 2

IFN-γ

Interferon gamma

IL-4

Interleukin 4

IL-10

Interleukin 10

TNF-α

Tumor necrosis factor alpha

Notes

Acknowledgments

The authors gratefully acknowledge the expert technical assistance of Pr. Mohamed EL-Baghdadi (Faculty of Sciences and Techniques, Sultan Moulay Slimane University, Beni Mellal, Morocco) and Dr. Amorette Barber (Associate Professor of Biology, Longwood University, Farmville, VA, USA), for reading and editing the manuscript.

Funding Information

This work was supported by the “Foundation Lalla Salma: Cancer Prevention and Treatment” Rabat. Morocco. Project 9/2013.

Compliance with Ethical Standards

Conflict of Interest

The authors declare that there are no conflicts of interest.

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Authors and Affiliations

  1. 1.Team of Experimental Oncology and Natural Substances, Cellular and Molecular ImmunopharmacologyFaculty of Sciences and Techniques, Sultan Moulay Slimane UniversityBeni MellalMorocco

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