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Endocrine Disruptions

A Small Dose of Persistent Endocrine Disruptors


  • An Introduction to the Health Effects of Endocrine Disruptors

Ancient Greek Athletes - "The Greek physician Galen is reputed to have prescribed 'the rear hooves of an Abyssinian ass, ground up, boiled in oil, and flavored with rose hips and rose petals' to improve performance."

Endocrine Disruptors Dossier


Name: Endocrine Disruptors

  • Use: wide range of chemicals, pesticides, plastics, flame retardants, medicine
  • Source: synthetic chemistry, plants
  • Recommended daily intake: none (not essential)
  • Absorption: intestine, respiratory system (lungs), skin
  • Sensitive individuals: fetus and children
  • Toxicity/symptoms: endocrine system, mimic estrogen, anti-estrogenic, effects on hormone levels, sexual characteristics, reproduction, developmental effects
  • Regulatory facts: FDA and EPA are reviewing
  • General facts: billions of pounds used every year in wide range of products
  • Environmental: widely distributed in environment and can affect wild life
  • Recommendations: minimize use, avoid exposure to children, and consider alternatives


Bisphenol-A Diethylstilbestrol


Persistent Environmental Contaminants Chapter


PowerPoint presentation


Potential Endocrine Disruptors

Class Chemical Use
Pesticide DDT Insecticide (no longer allowed in US
  2,4-D Herbicide
  Atrazine Herbicide
Plastics additives Bisphenol A Harden in plastics
  Phthalates Softener in plastics, solvent
Industrial chemical Nonylphenol (breakdown product of nonylphenol ethoxylates Detergents, paints, pesticides
Fire retardant Polybrominated diphenyl ethers (PBDE) Fire retardant
Drug Diethylstilbesterol (DES) No longer used to prevent miscarriages
Contaminants Dioxin Byproduct PVC plastics, incineration byproduct, contaminant in certain chlorinated compounds
  Arsenic, Lead, Mercury Widespread contaminants
  Polychlorinated biphenyls (PCB) Formerly used in transformer oils

Major Glands and Examples of Hormones and Function

Gland (location) Example hormone Function
Pineal gland (brain) Melatonin Sleep
Pituitary gland (brain) Growth hormone Growth, cell reproduction
  Prolactin Milk production, sexual gratification
  Thyroid-stimulating hormone stimulates thyroid gland to secrete T3 and T4
  Luteinizing hormone Female: ovulation - Male: regulates testosterone
Thyroid gland (neck) Thyroxine (T4) Metabolism
  Triiodothyronine (T3) Metabolism
Adrenal gland (kidney) Glucocorticoids Effects glucose uptake
  Adrenaline Fight-or-flight response (range of effects)
Pancreas (kidney) Insulin Regulates glucose
Ovary (female) Progesterone Pregnancy, muscle relaxation, range of effects
  Estrogens Growth, sexual characteristics
Testes (male) Testosterone (androgen) Muscle mass, bone density, sexual maturation

More Information and References


European, Asian, and international Agencies


  • World Health Organization - WHO Pesticide Evaluation Scheme (WHOPES). (accessed: 30 September 2008).
    WHOPES is an "international programme which promotes and coordinates the testing and evaluation of new pesticides proposed for public health use."

North American Agencies


  • US EPA Endocrine Disruptor Screening Program (EDSP)|http://www.epa.gov/endo/]. (accessed: 15 June 2009).
    Describes the program, efforts to develop the screening test, and prioritization of chemicals to be tested.
  • US National Institutes of Environmental Health Sciences (NIEHS), National Institutes of Health - Endocrine Disruptors. (accessed: 23 May 2009).
    Provides an overview of endocrine disruptors and recent research.

Non-Government Organizations


  • The Endocrine Disruption Exchange, Inc. (TEDX) - Critical Windows of Development (Prenatal Origins of Endocrine Disruption). (accessed: 23 May 2009).
    "Critical Windows of Development is a timeline of how the human body develops in the womb, with animal research showing when low-dose exposure to endocrine disrupting chemicals during development results in altered health outcomes."
  • Natural Resources Defense Council - Endocrine Disruptors. (accessed: 9 June 2009).
    General information on endocrine disruptors.

References


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