diabetes

Heavy metals scientifically linked to causing diabetes

Thursday, April 24, 2014 by: Ethan A. Huff, staff writer
Tags: heavy metals, diabetes, trace elements

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(NaturalNews) Fifty years ago, it was virtually unheard of. But today, diabetes mellitus, a serious metabolic disorder, afflicts more than 150 million people globally, with a bulk of this number hailing from North America. And researchers out of Asia, having published their findings back in 2009, exposed toxic heavy metals as a major, and perhaps even primary, contributor to this growing disease epidemic.

Reflective of sobering statistics released by the U.S. Centers for Disease Control and Prevention (CDC) showing that diabetes prevalence increased nearly 50 percent between the years of 1991 and 2000, the study looked at the effects of heavy metals in vitro (in a test tube), in vivo (in living organisms) and in human subjects. The metals zinc, arsenic, cadmium, mercury and nickel were all evaluated.

Recognizing the latter four metals as known neurotoxins, the researchers compared what is already known about diabetes and how it forms and progresses inside the body to heavy metal exposure and how the body responds to it. Based on this analysis, they determined that arsenic, cadmium, mercury and nickel all contribute to the condition known as diabetes, as does a lack of zinc, a nutrient that helps prevent heavy metal damage.

"The studies that compared the levels of essential trace elements in biological samples of patients who have diabetes mellitus type 2, with those of nondiabetic control subjects, have suggested that deficiency and accumulation of some essential trace metals may play a role in the development of diabetes mellitus," wrote the authors of this study.

Arsenic causes insulin resistance, oxidative stress

Used in commercial poultry and swine production, arsenic is a highly toxic metalloid that easily dissolves in water and is taken up from the soil by many plants, including rice crops. Besides causing nervous system disorders, peripheral vascular disease, endocrine disruption and cancer, arsenic has also been found to alter certain biological processes that regulate insulin resistance.

"[M]any studies have indicated that arsenic could alter signaling transduction factors... affecting the insulin-stimulated glucose uptake in adipocytes or skeletal muscle cells, which may potentially link with insulin resistance," wrote the authors.

Arsenic has also been shown in the scientific literature to cause oxidative stress, which the authors of the heavy metal study found has the potential to damage the body's ability to properly metabolize glucose. In the process, homeostasis is obstructed and the body is made more susceptible to disease formation, which includes diabetes.

Cadmium inhibits insulin release, damages insulin receptors

Like arsenic, the heavy metal cadmium has no beneficial purpose inside the body and is highly toxic. Science has repeatedly shown that it accumulates in vital organs, and particularly the liver, where it damages organ tubules and blocks the reabsorption of calcium, leading to bone loss. Cadmium also damages the key pathways through which the body regulates glucose metabolism.

"[S]everal studies have shown that cadmium-induced hyperglycemia was associated with increased lipid peroxidation, decreased insulin release, increased activation of gluconeogenic enzymes and impaired insulin receptor," explain the authors. "Also, cadmium has been shown to impair glucose tolerance in rats."

Mercury increases urine glucose levels, creates oxidative stress

Perhaps more well-known than the others in terms of its toxicity, mercury has also been implicated in causing diabetes. A study that began in the 1980s on patients with Minamata disease revealed that those who suffered from organic mercury poisoning also had elevated levels of glucose in their urine. From this, it was deduced that increased mercury levels may be a causative factor in the formation of diabetes.

As it turns out, all three forms of mercury -- these include elemental or metallic mercury, inorganic mercury and organic mercury -- are associated with causing major biological damage in the body. Altered glucose levels are just one form of this damage, as exposure to mercury in all forms has been shown to promote DNA-damaging oxidative stress.

"Organic or inorganic mercury compounds are well known to induce cellular damage in various cell types, such as renal cells, astrocytes, lymphoma cells, human gingival fibroblast cells, alveolar epithelial cells and pancreatic islet beta-cells," reads the study.

Lack of trace minerals promotes diabetes

Many of these same effects are exacerbated by exposure to nickel as well, another heavy metal that accumulates in bodily organs and tissue, particularly when beneficial trace minerals like zinc are lacking. In other words, an excess of harmful metals combined with a lack of beneficial ones is a recipe for chronic disease, and an almost surefire path to developing diabetes.

"This work provides a way of thinking about the role of toxic metals/environmental factors in the blood glucose regulation and homeostasis," concludes the study. "Some toxic metals may disrupt glucose uptake and alter the related molecular mechanism in glucose regulation."

You can view the full study in PDF form here:
https://www.landesbioscience.com

Sources for this article include:

http://www.ncbi.nlm.nih.gov

https://www.landesbioscience.com

http://science.naturalnews.com

http://science.naturalnews.com

http://science.naturalnews.com

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