Endocrine Disruption in The Age of Water

Diary Water cover finalIn my recent novel A Diary in the Age of Water published by Inanna Publications Lynna, the diarist, talks with colleague Daniel about the increase in human infertility related to endocrine disruption. Daniel starts with a litany of reasons for human infertility:

“Scientists all agree that environmental factors are the main triggers for male and female infertility through epigenetics. The list of exposure triggers is endless. You know the main culprits: heavy metals, pesticides, PCBs, PAHs, VOCs, car exhaust, tobacco smoke … mostly chemicals with hormonal properties” Leaning on his microscope, Daniel went on, “Wherever there’s a sewage treatment plant, pulp and paper mill, or herbicides and pesticides in a stream, you get endocrine disruption, which causes more female or intersex fish populations. Then there’s nonylphenols—”

“—Degradation products of surfactants used in commercial and household detergents,” I ended for him and leaned against the doorway.

He nodded. “They inhibit breeding in male fish. And herbicides like atrazine—”

“—Create feminized males with female eggs, along with reduced immunity to disease,” I finished for him.

I knew all this. Hormonal disruption is global. Environmental toxicologists have been finding it in many aquatic animals like fish, turtles, alligators and frogs. And some terrestrial animals…Even humans…Was it also causing the steep rise in ambiguous sex in humans? Apparently 1 in 30 now have bodies that differ notably from standard male or female. Klinefelter, androgen insensitivity syndrome, presence of ovotestes, mixed gonadal dysgenesis, and mosaic genetics are all on the rise.

Daniel added, “The environment is changing us faster than most think and it’s doing it through epigenetics and HGT.”

Their discussion, which leads to something far more disastrous, is based on the reality of today.

endocrine systemThe endocrine system is a set of glands and the hormones they produce that help guide and regulate the development, growth, reproduction and behavior of most living things (yes plants too!). Some hormones are also released from parts of the body that aren’t glands, like the stomach, intestines or nerve cells. These usually act closer to where they are released. The endocrine system is made up of glands, which secrete hormones, and receptor cells which detect and react to the hormones. Hormones travel throughout the body, acting as chemical messengers, and interact with cells that contain matching receptors. The hormone binds with the receptor, like a key into a lock. Some chemicals, both natural and human-made, may interfere with the hormonal system. They’re called endocrine disruptors.

Endocrine (hormone) disruptors are substances that interfere with an organism’s endocrine system and disrupt the physiologic function of hormones. Studies have linked endocrine disruptors to adverse biological effects in animals, giving rise to valid concerns that low-level exposure can cause similar effects in human beings.

common endocrine disruptors

Common endocrine disruptors

 

Disruption of the endocrine system via Endocrine Disrupting Chemicals (EDCs) or Hormone Disrupting Chemicals (HDCs) happens in different ways. Some chemicals mimic a natural hormone, fooling the body into over-responding to the stimulus, or responding at inappropriate times. Other endocrine disruptors curtail the effects of a hormone from certain receptors by blocking the receptor site on a cell. Still others directly stimulate or inhibit the endocrine system and cause overproduction or underproduction of hormones.

EDC path

The effects of endocrine disruptors in humans include:

  • Reduction of male fertility;
  • Abnormalities in male reproductive organs;
  • Female reproductive diseases;
  • Earlier puberty; and,
  • Declines in the numbers of males born.

Some EDCs can also affect the development of the nervous and immune systems. Some well-known examples of EDCs include the contraceptive pill (17-alpha ethinylestradiol), dioxins, PCBs, PAHs, furans, phenols and several organic pesticides (most prominently DDT and its derivatives).

Pathways of endocrine disruptors

Pathophysiological pathways of EDCs

Sources for common EDCs in our daily lives are provided by Hormone Health Network in the table below:

Common EDCs: Used In:
DDT, Chlorpyrifos, Atrazine, 2, 4-D, Glyphosate Pesticides
Lead, Phthalates, Cadmium Children’s Products
Polychlorinated biphenyls (PCBs) and Dioxins Industrial Solvents or Lubricants and their Byproducts
Bisphenol A (BPA), Phthalates, Phenol Plastics and Food Storage Materials
Brominated Flame Retardants, PCBs Electronics and Building Materials
Phthalates, Parabeans, UV Filters Personal Care Products, Medical Tubing, Suncreen
Triclosan Anti-Bacterial Soaps, Colgate Total
Perfluorochemicals Textiles, Clothing, Non-Stick Food Wrappers, Mircowave Popcorn Bags, Old Teflon Cookware

Several chemicals have been found to disrupt the endocrine systems of animals in laboratory studies, and strong evidence exists that chemical exposure has been associated with adverse developmental and reproductive effects on fish and wildlife. The relationship of human diseases of the endocrine system and exposure to environmental contaminants, however, is still poorly understood (Kavlock et al., 1996, EPA, 1997).

One example of the devastating consequences of the exposure of developing animals, including humans, to endocrine disruptors is the case of the potent drug diethylstilbestrol (DES), a synthetic estrogen. Prior to its ban in the early 1970s, doctors mistakenly prescribed DES to as many as five million pregnant women to block spontaneous abortion and promote fetal growth. It was discovered after the children went through puberty that DES affected the development of the reproductive system and caused vaginal cancer. In addition to disruption of reproductive hormones, modulation of adrenal, thyroid and growth hormone function have also been described for various compounds in both humans and some animals, although the significance of these effects have not yet been fully determined.

Chemicals with affinities for estrogen receptors may cause lowered sperm count and other related reproductive abnormalities. Male fetuses exposed to high doses of estrogens may develop many female characteristics. Lower doses may alter the differentiation and multiplication of the germ cells that eventually give rise to sperm. Dr. John A. McLachlan, director of intramural research at the National Institute of Environmental Health Sciences noted that “some of the environmental chemicals that have estrogenic activity also seem to have a long half-life and can bioaccumulate” in the body’s fat tissue. Most endocrine disrupting chemicals are fat-soluble. This means that they do not get rapidly flushed out of the body, but are stored in fat. These chemicals bioaccumulate up the food chain. As a result, an individual will accumulate more of these chemicals throughout his/her lifetime. Major routes of removing these chemicals involve transfer from mother to child, through the placenta and in breast milk.

In 1992 researchers at Lake Apopka in Florida associated a declining alligator population with a depressed reproduction rate. Many of the male alligators had tiny penises that prevented successful reproduction. These developmental problems were connected to a large organochlorine pesticide spill several years earlier; although the water tested clean, the alligators and their eggs contained detectable levels of endocrine disrupting pesticides.

Atrazine male female frogs

Fish in the Great Lakes, which are heavily contaminated with polychlorinated biphenyls (PCBs) and other organochlorines, exhibit numerous reproductive function problems and swelling of the thyroid gland. Fish-eating birds, such as eagles, terns, and gulls are also showing similar health effects, as are mink, a mammal that also eats fish from the Great Lakes. These findings are consistent with lab studies that indicate that PCBs interfere with thyroid function and with sex hormones.

The environment is a global entity that recognizes no political boundaries. Issuing a plea for wise action, the National Resources Defense Council state: “Dioxin from a paper mill in the US can accumulate within livestock that is exported to another country; water vapor carrying DDT (now banned in the US) from Mexico can be rained down in Minnesota. Individuals living near the North Pole, where DDT has never been used, have surprisingly high levels of it in their body fat. The laws that ban the production and use of specific chemicals in the United States do little to regulate against exposure via imported products from countries that allow the use of these chemicals.”

Given the common use of sources (in industry, agriculture and residential) that contain and distribute endocrine disruptive chemicals by the human population, and given their bioaccumulation in human tissue, I can practically guarantee that virtually all humans carry some endocrine disruptive chemical in their bodies. How much depends on your life style, where you live and work, your eating habits and your physiology.

freighter-rowers-sailboat-web

Freighter in Toronto Harbour (photo by Nina Munteanu)

 

Recommended Reading:

Lauretta, Rosa, Andrea Sansone, Missimiliano Sansone, Francesco Romanelli and Marialuisa Appetecchia. 2019. “Endocrine Disrupting Chemicals: Effects on Endocrine Glands.” Front. Endocrinol. Online: https://www.frontiersin.org/articles/10.3389/fendo.2019.00178/full

Colborn, Theo, Dianne Dumanoski, and John Peterson Myers. 1996. “Our stolen future : are we threatening our fertility, intelligence, and survival? : a scientific detective story.” Dutton, New York.  306 pp.

Hormone Health Network. 2020. “Endocrine-Disrupting Chemicals EDCs.” Website: https://www.hormone.org/your-health-and-hormones/endocrine-disrupting-chemicals-edcs

National Institute of Environmental Health Sciences. 2019. “Endocrine Disruptors.” Website: https://www.niehs.nih.gov/health/topics/agents/endocrine/index.cfm

NRDC. 2016. “9 Ways to Avoid Hormone-Disrupting Chemicals.” Website: http://www.nrdc.org/health/effects/bendrep.asp

 

More on A Diary in the Age of Water:

 

nina-2014aaa

Nina Munteanu is a Canadian ecologist / limnologist and novelist. She is co-editor of Europa SF and currently teaches writing courses at George Brown College and the University of Toronto. Visit www.ninamunteanu.ca for the latest on her books. Nina’s bilingual “La natura dell’acqua / The Way of Water” was published by Mincione Edizioni in Rome. Her non-fiction book “Water Is…” by Pixl Press (Vancouver) was selected by Margaret Atwood in the New York Times ‘Year in Reading’ and was chosen as the 2017 Summer Read by Water Canada. Her novel “A Diary in the Age of Waterwas released by Inanna Publications (Toronto) in June 2020.

 

What If the Birds All Die?

 

Over increasingly large areas of the United States, spring now comes unheralded by the return of the birds. The early mornings are strangely silent where once they were filled with the beauty of bird song.”—Rachel Carson, Silent Spring

Sunset 2

Sunset in Niagara on the Lake, Ontario (photo by Nina Munteanu)

I’m a science fiction writer. I’m thinking “what if” premises all the time. One that nags me is: What if the birds all die?

We might be closer to it than you think…

SONY DSC

Chickadee in Ontario (photo by Merridy Cox)

The October 2019 issue of Science magazine reported a staggering decline in North American birds. Kenneth V. Rosenberg and his team of researchers estimated that three billion birds of various species have disappeared in Canada and the US since 1970.

That’s a third of the entire bird population lost in five decades.

The focus of the study wasn’t on extinction; these are still common species—just greatly diminished in numbers. This makes sense to me. My naturalist friend and I have both noticed how even the common house sparrow have declined in our neighbourhoods. My friend noticed fewer dashes of colour in the trees provided by yellow warblers in the past few years.

SONY DSC

Northern Cardinal (photo by Merridy Cox)

 

The Guardian reported that two thirds of the house sparrow population have disappeared in Europe. That’s close to 150 million birds. The article blamed changes in land use (destruction of habitat), coastal management (destruction of wetlands) and weather (including climate change). In another study, car exhaust was implicated in a 60% loss of common sparrow numbers from the mid 1990s.

In North America, warbler populations dropped by 600 million. Blackbirds by 400 million. The common robins, cardinals, and blue jays had noticeably declined. Even starlings—once considered a kind of fast-breeding pest—have dwindled by 50%. The Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services have determined that three-quarters of Earth’s terrestrial and two-thirds of the its marine environments have been severely altered by human actions.

Unchecked deforestation. Unchecked use of toxic pesticides. Turning wetlands into parking lots. Climate change. We are destroying the integrity of ecosystems throughout this planet on a massive scale. And the birds are telling us…

SONY DSC

Baby Robin rests on a porch chair in Mississauga, ON (photo by Merridy Cox)

subTerrain 85 coverMy short story “Out of the Silence,” which appeared in the Spring 2020 issue of subTerrain Literary Magazine (Issue 85), tells the story of Katherine, a blind elder whose digital app failed to warn the world of the sudden global loss of birds with disastrous ecological consequences. After years of living in self-exile and getting around poorly on sight-enhancing technology, a discovery gives her new hope in rekindling her talents in the field of soundscape ecology.

I rock on the cedar swing on my veranda and hear the wind rustling through the gaunt forest. An abandoned nest, the forest sighs in low ponderous notes. It sighs of a gentler time. A time when birds filled it with song. A time when large and small creatures—unconcerned with the distant thrum and roar of diggers and logging trucks—roamed the thick second-growth forest. The discord was still too far away to bother the wildlife. But their killer lurked far closer in deadly silence. And it caught the birds in the bliss of ignorance…

RachelCarson-SilentSpring

Rachel Carson was nothing short of prophetic when she published Silent Spring in 1962 (in reference to the dawn chorus most noticeable in spring during breeding). Silent Spring cautioned burgeoning ag-biotech companies (like Monsanto—now Bayer—Sygenta, Dow, and DuPont) who were carelessly and flagrantly spraying fields with pesticides and herbicides—at the time DDT was the main culprit. This would soon become a GMO world where gene-hacked plants of monocultures can withstand the onslaught of killer pesticides like neonicotinoids (currently killing bees everywhere) and Roundup.  Roundup is a carcinogenic glyphosate-based weed killer that has recently been shown to kill beneficial insects like bees) and has been linked to Alzheimer’s disease, ADHD, birth defects, autism, and several kinds of cancer in humans.

RachelCarson-LindaLearIn her 1997 biography Rachel Carson: Witness for Nature, historian and science biographer Linda Lear wrote:

Silent Spring, the product of [Carson’s] unrest, deliberately challenged the wisdom of a government that allowed toxic chemicals to be put into the environment before knowing the long-term consequences of their use. Writing in language that everyone could understand and cleverly using the public’s knowledge of atomic fallout as a reference point, Carson described how chlorinated hydrocarbons and organic phosphorus insecticides altered the cellular processes of plants, animals, and, by implication, humans. Science and technology, she charged, had become the handmaidens of the chemical industry’s rush for profits and control of markets. Rather than protecting the public from potential harm, the government not only gave its approval to these new products but did so without establishing any mechanism of accountability. Carson questioned the moral right of government to leave its citizens unprotected from substances they could neither physically avoid nor publicly question. Such callous arrogance could end only in the destruction of the living world.

Despite Carson’s warnings in 1962 and despite some action eventually taken (e.g. the ban on use of DDT in 1972—the precursor to Roundup and other neonicotinoids currently in use), the use of chemicals in big ag-industry has increased over five-fold since the 1960s. And this is destroying our bee populations, other beneficial insects, beneficial weeds, small animal populations and—of course—our bird life. And it’s making us sick too.

Bumble bee

Bumble bee at risk

In a 2012 article in the New York Times—exactly fifty years after Silent Spring was published on September 27, 1962—Nancy F. Koehn tells us that, “[Rachel Carson] was a slight, soft-spoken woman who preferred walking the Maine shoreline to stalking the corridors of power. And yet Rachel Carson, the author of Silent Spring, played a central role in starting the environmental movement, by forcing government and business to confront the dangers of pesticides.” Carson, writes Koehn, was an introverted scientist with a lyrical bent, who saw it as her mission to share her observations with a wider audience. Carson wrote Silent Spring while battling illness (including breast cancer) and caring for her young son. When the book was published, she faced an outburst of public reaction and strong backlash, primarily from chemical companies. Not unlike another female eco-hero (Greta Thunberg), Carson endured with dignity and deliberation the vulgar censure by opponents (virtually all men tied to corporate giants) who attacked her personally with vilifying stereotype. Men accused her of being disloyal and unscientific, and being a hysterical woman. One letter to the editor that the New Yorker saw fit to print read:

silent-spring-rachel carson“Miss Rachel Carson’s reference to the selfishness of insecticide manufacturers probably reflects her Communist sympathies, like a lot of our writers these days. We can live without birds and animals, but, as the current market slump shows, we cannot live without business. As for insects, isn’t it just like a woman to be scared to death of a few little bugs! As long as we have the H-bomb everything will be O.K.”

Former Secretary of Agriculture Ezra Taft Benson wrote privately to former President Dwight Eisenhower that Carson was “probably a communist.”

Environment & Society Portal provides a revealing synopsis of the response by established patriarchy at the time:

Allegations that Carson was just a hysterical woman appeared both in the pages of chemical and agricultural trade journals as well as in the popular press. Women were imagined to be less rational, more emotional, and more sentimental than men, who could be relied upon to study the issues dispassionately and propose rational solutions. An agricultural expert told a reporter at the Ribicoff hearings, “You’re never going to satisfy organic farmers or emotional women in garden clubs” (Graham 1970, 88). In his letter to Eisenhower, Benson wondered why a “spinster was so worried about genetics” (Lear 1997, 429).

As Carson had no institutional affiliation, she was dismissed as an amateur who did not understand the subject like a professional scientist would, or who distorted or misread the science. To her critics, Carson’s frequent use of terms like “nature,” “natural,” and “balance of nature” identified her as a mere sentimental nature lover or a pantheist like Ralph Waldo Emerson or Henry David Thoreau. Reviews in TimeU.S. News and World Report, and even Sports Illustrated took her to task. The reviewer in Time, for example, criticized her “emotion-fanning words” and characterized her argument as “unfair, one-sided, and hysterically overemphatic.” He traced her “emotional and inaccurate outburst” to her “mystical attachment to the balance of nature” (Brooks 1989, 297).

SONY DSC

American Robin (photo by Merridy Cox)

Even inoffensive public portraits of Carson showed her in more domestic rather than scientific settings. Life magazine published a story about her accompanied by photos of her talking with children while on a nature walk or watching birds with a group of Audubon Society members. Dressed like a housewife and surrounded by children and “bird people,” Carson projected an image of a teacher or stay-at-home mother, although the picture on the first page of the article showed her at a microscope. Carson, said the story, “is unmarried but not a feminist (‘I’m not interested in things done by women or by men but in things done by people’)”

According to historian and biographer Linda Lear, “the industry spent a quarter of a million dollars to discredit her research and malign her character. In the end, the worst they could say was that she had told only one side of the story and had based her argument on unverifiable case studies.” According to Lear, “Carson was an outsider who had never been part of the scientific establishment, first because she was a woman but also because her chosen field, biology, was held in low esteem in the nuclear age. Her career path was nontraditional; she had no academic affiliation, no institutional voice. She deliberately wrote for the public rather than for a narrow scientific audience. For anyone else, such independence would have been an enormous detriment. But by the time Silent Spring was published, Carson’s outsider status had become a distinct advantage. As the science establishment would discover, it was impossible to dismiss her.”

SONY DSC

House Sparrow (photo by Merridy Cox)

Not unlike Greta, Rachel and the message in her book exerted a great impact on the environmental movement. Silent Spring became a rallying focus for a new social movement in the 1960s, which endures to the present day.

According to Lear:

“Carson’s concept of the ecology of the human body was a major departure in our thinking about the relationship between humans and the natural environment. It had enormous consequences for our understanding of human health as well as our attitudes toward environmental risk. Silent Spring proved that our bodies are not boundaries. Chemical corruption of the globe affects us from conception to death. Like the rest of nature, we are vulnerable to pesticides; we too are permeable. All forms of life are more alike than different.

“Carson believed that human health would ultimately reflect the environment’s ills. Inevitably this idea has changed our response to nature, to science, and to the technologies that devise and deliver contamination. Although the scientific community has been slow to acknowledge this aspect of Carson’s work, her concept of the ecology of the human body may well prove to be one of her most lasting contributions.”

Bernie Krause Florida

Bernie Krause

In the meantime, alarming signals suggest that Rachel Carson’s 1962 warning is currently underway. The new science of soundscape ecology can analyze the health of an ecosystem. Bernie Krause, a soundscape ecologist who has been conducting long-term recordings recently noted that in Sugarloaf Ridge State Park, not far from his home in Northern California, “the effect of global warming and resulting drought has created the first completely silent spring I’ve ever experienced.” Stuart Winter at Express reports that “many of the iconic birds whose mating calls ring out across woodlands and open fields during early May are vanishing at an alarming rate.”

“Man’s war against nature is inevitably a war against himself.”—Rachel Carson

 

 

nina-2014aaa

Nina Munteanu is a Canadian ecologist / limnologist and novelist. She is co-editor of Europa SF and currently teaches writing courses at George Brown College and the University of Toronto. Visit www.ninamunteanu.ca for the latest on her books. Nina’s bilingual “La natura dell’acqua / The Way of Water” was published by Mincione Edizioni in Rome. Her non-fiction book “Water Is…” by Pixl Press (Vancouver) was selected by Margaret Atwood in the New York Times ‘Year in Reading’ and was chosen as the 2017 Summer Read by Water Canada. Her novel “A Diary in the Age of Waterwas released by Inanna Publications (Toronto) in May 2020.