Persistent hexavalent chromium exposure impaired the pubertal development and ovarian histoarchitecture in wistar rat offspring

Authors

  • Jawahar B. Samuel,

    Corresponding author
    1. Department of Zoology, St. John's College, Thirunelveli, TN 627002, India
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  • Jone A. Stanley,

    1. Department of Endocrinology, Dr. ALM Post Graduate Institute of Basic Medical Sciences, University of Madras, Chennai, TN 600113, India
    Current affiliation:
    1. Department of Veterinary Integrative Biosciences, Collegeof Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA
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  • Pasupathi Sekar,

    1. Department of Endocrinology, Dr. ALM Post Graduate Institute of Basic Medical Sciences, University of Madras, Chennai, TN 600113, India
    2. Department of Zoology, Voorhees College, Vellore, TN 632001, India
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  • Rajendran A. Princess,

    1. Department of Zoology, St. John's College, Thirunelveli, TN 627002, India
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  • Maria S. Sebastian,

    1. Department of Advanced Zoology and Biotechnology, St. Xavier's College, Thirunelveli, TN 627002, India
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  • Michael M. Aruldhas

    1. Department of Endocrinology, Dr. ALM Post Graduate Institute of Basic Medical Sciences, University of Madras, Chennai, TN 600113, India
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Abstract

Hexavalent chromium (CrVI) is a highly toxic metal and a major environmental pollutant. Several studies indicate that CrVI exposure adversely affects reproductive function. We reported that maternal Cr exposure resulted in Cr accumulation in the reproductive organs of female offsprings. CrVI can cross the placental barrier and also can be passed through breastfeeding. The present investigation aimed to determine the persistent (in utero through puberal period) CrVI exposure-induced toxic effects on the reproductive functions of mother and the offspring. Induction of oxidative stress is one of the plausible mechanisms behind Cr-induced cellular deteriorations. Mother rats exposed to CrVI showed reduced reproductive outcome, while the offsprings showed higher accumulation of Cr in ovary, altered steroid, and peptide hormones. Specific activities of antioxidant enzymes were decreased and associated with increased levels of H2O2, and lipid peroxidation. CrVI exposure also damaged the ovarian histoarchitecture in various age groups studied. CrVI exposure also delayed the sexual maturation. Results from the present investigation suggest that CrVI exposure from in utero through puberal period significantly damaged the pubertal development through altered antioxidants, anemia, and altered hormone levels. These changes were associated with damaged ovarian histoarchitecture and extended estrous cycle in developing Wistar rats. © 2012 Wiley Periodicals, Inc. Environ Toxicol 29: 814–828, 2014.

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