Friday Jul 15, 2022
The Gary Null Show - 07.15.22
Lutein and zeaxanthin isomers benefits during high screen exposure
University of Georgia, July 10, 2022
An exciting new peer reviewed publication based on ongoing research on macular carotenoids from the University of Georgia demonstrates that supplementation with lutein and zeaxanthin isomers can protect against a growing issue among the general population -- the undesirable effects of prolonged exposure to high-energy blue light emitted from digital screens of computers, tablets and smartphones. Lutein and zeaxanthin isomers -- known as the macular carotenoids -- are natural filters of high-energy blue light. High-energy blue light reaches deep into the eye and can harm the macula -- the region of the eye responsible for highest visual acuity- by promoting the production of free radicals. Short-term effects can cause eye fatigue while long-term exposure can lead to a progressive loss of visual function.
This is the first study to examine the impact of macular carotenoids supplementation to protect visual health and performance, improve sleep quality and reduce eye strain and fatigue during prolonged exposure to blue light emitting digital screens.
The study was a 6-month randomized, double-blind, placebo-controlled supplementation trial with 48 healthy, young adults with screen time exposure of at least 6 hours daily. Subjects were evaluated at baseline, 3-months and 6-months for MPOD (Macular Pigment Optical Density) and markers of visual performance including contrast sensitivity, photostress recovery and disability glare. Sleep quality, which is affected by blue light exposure, and physical indicators of excessive screen use were also measured. The results show that supplementing with lutein and zeaxanthin significantly improved macular pigment optical density, visual performance and indicators of excessive screen use, including eye strain and fatigue and headache frequency. Sleep quality also improved significantly.
Study explores the effects of eating dark chocolate on the brain
Elham Kalantarzedeh, Maryam Radahmadi and Parham Reisi, three researchers at Isfahan University of Medical Science in Iran have recently carried out a study on rats investigating the impact of different dark chocolate dietary patterns on synapses in a specific region of the brain, known as the hippocampal CA1 area. Their findings, published in Nutritional Neuroscience, suggest that dark chocolate consumption could have beneficial effects on the brain of individuals exhibiting chronic isolation stress.
"Although stress causes brain dysfunction, consumption of dark chocolate (DC) has positive effects on brain functions," the researchers wrote in their paper. "The current study investigated the impact of different DC dietary patterns on synaptic potency and plasticity in the hippocampal CA1 area, as well as food intake and body weight in rats under chronic isolation stress."
Overall, the experiments carried out by this team of researchers suggest that the systematic consumption of dark chocolate could reverse the adverse effects of chronic isolation stress on the synaptic potency and plasticity of the hippocampal CA1 area. This would in turn have beneficial effects on both memory and learning.
Vitamin C found to block growth of cancer stem cells, says peer reviewed study
University of Salford (UK), July 8, 2022
Increasingly, researchers are discovering the role played by cancer stem cells in the growth and spread of the disease. In groundbreaking new research, vitamin C showed its ability to target cancer stem cells and stop their growth – preventing the recurrence of tumors.
In a newly-published study conducted at the University of Salford in Manchester, vitamin C demonstrated its power to stop tumors in their tracks by interfering with cancer stem cell metabolism – suppressing their ability to process energy for survival and growth.
The study explored the effects of vitamin C on cancer stem cells – and provided evidence that vitamin C, in the form of ascorbic acid, can target and kill them.
The team investigated the impact on cancer stem cells of seven different substances. Three were natural substances, three were experimental drugs, and one was an FDA-approved clinical drug that is widely used.
The natural products studied, along with vitamin C, were silibinin – derived from milk thistle seeds – and caffeic acid phenyl ester – or CAPE – derived from honeybee propolis. The experimental drugs were actinonin, FK866 and 2-DG, and the clinical drug was stiripentol.
Researchers noted that vitamin C destroyed cancer stem cells by inducing oxidative stress. And, the vitamin performed this process ten times more effectively than 2-DG.\
By inhibiting glycolysis, vitamin C inhibited mitrochondrial protein synthesis in cancer stem cells – while leaving healthy cells unaffected.
All seven of the substances tested inhibited the growth of cancer cells to varying degrees – including the non-toxic natural substances. But researchers said the most “exciting” results were with vitamin C.
Again, vitamin C was 1,000 percent more effective than 2-DG, an experimental pharmaceutical drug – in targeting cancer stem cells.
Preterm birth more likely with exposure to phthalates
National Institute of Environmental Health Sciences, July 11 2022
Pregnant women who were exposed to multiple phthalates during pregnancy had an increased risk of preterm birth, according to new research by the National Institutes of Health. Phthalates are chemicals used in personal care products, such as cosmetics, as well as in solvents, detergents, and food packaging.
After analyzing data from more than 6,000 pregnant women in the United States, researchers found that women with higher concentrations of several phthalate metabolites in their urine were more likely to deliver their babies preterm, which is delivering three or more weeks before a mother’s due date.
“Having a preterm birth can be dangerous for both baby and mom, so it is important to identify risk factors that could prevent it,” said Kelly Ferguson, Ph.D., an epidemiologist at the National Institute of Environmental Health Sciences (NIEHS), part of NIH, and the senior author on the study published in the journal JAMA Pediatrics.
Higher concentrations of most phthalate metabolites examined were associated with slightly higher odds of preterm birth. Exposure to four of the 11 phthalates found in the pregnant women was associated with a 14-16% greater probability of having a preterm birth. The most consistent findings were for exposure to a phthalate that is used commonly in personal care products like nail polish and cosmetics.
The researchers also used statistical models to simulate interventions that reduce phthalate exposures. They found that reducing the mixture of phthalate metabolite levels by 50% could prevent preterm births by 12% on average.
Study finds vitamin A directs immune cells to the intestines
Purdue University, July 9, 2022
A key set of immune cells that protect the body from infection would be lost without directions provided by vitamin A, according to a recent study.
A team of researchers from Purdue University found retinoic acid, a metabolite that comes from digested vitamin A, is necessary for two of the three types of innate immune cells that reside in the intestine to find their proper place.
"It is known that vitamin A deficiencies lead to increased susceptibility to disease and low concentrations of immune cells in the mucosal barrier that lines the intestines," said Chang Kim, the professor and section head of microbiology and immunology in Purdue's College of Veterinary Medicine who led the research. "We wanted to find the specific role the vitamin plays in the immune system and how it influences the cells and biological processes. The more we understand the details of how the immune system works, the better we will be able to design treatments for infection, and autoimmune and inflammatory diseases."
Within the immune system there are two categories of cells that work together to rid the body of infection: innate immune cells, the innate lymphoid cells and leukocytes that are fast acting and immediately present to eliminate infection; and adaptive immune cells, the T-cells and B-cells that arrive later, but are specific to the pathogen and more effective at killing or neutralizing it. All innate immune cells are produced in the bone marrow, but eventually populate other areas of the body.
Innate lymphoid cells first gather in the lymph nodes before traveling to their final destination, and this is where retinoic acid acts upon two of the three subsets destined for the intestines. Kim and his team found that retinoic acid activates specific receptors in the cells that act as homing devices for the intestines.
"It is interesting that both innate and adaptive immune cells share a vitamin A-regulated pathway for migration."
Drinking alcohol while pregnant could have transgenerational effects
University of California, Riverside, July 7, 2022
Soon-to-be mothers have heard the warning – don't drink while pregnant.
The study by Kelly Huffman, psychology professor at the University of California, Riverside, was published in the journal Cerebral Cortex.
"Traditionally, prenatal ethanol exposure (PrEE) from maternal consumption of alcohol, was thought to solely impact directly exposed offspring, the embryo or fetus in the womb. However, we now have evidence that the effects of prenatal alcohol exposure could persist transgenerationally and negatively impact the next-generations of offspring who were never exposed to alcohol," Huffman said.
To determine whether the abnormalities in brain and behavior from prenatal ethanol exposure would pass transgenerationally, Huffman generated a mouse model of FASD and tested many aspects of brain and behavioral development across three generations. As expected, the first generation, the directly exposed offspring, showed atypical gene expression, abnormal development of the neural network within the neocortex and behavioral deficits. However, the main discovery of the research lies in the subsequent, non-exposed generations of mice. These animals had neurodevelopmental and behavioral problems similar to the those of the first, directly exposed generation.
"We found that body weight and brain size were significantly reduced in all generations of PrEE animals when compared to controls; all generations of PrEE mice showed increased anxiety-like, depressive-like behaviors and sensory-motor deficits. By demonstrating the strong transgenerational effects of prenatal ethanol exposure in a mouse model of FASD, we suggest that FASD may be a heritable condition in humans," Huffman said.