A new effect of red ginseng: suppression of lung cancer metastasis
KIST Gangneung Institute (South Korea), March 3, 2021
Red ginseng, which has long been used as an ingredient in traditional Korean medicine, has recently drawn increased attention as a functional material for its health-promoting effects. The composition and activities of red ginseng vary depending on the processing method, and this has become an active area of research. Recently, a research team in Korea has entered the...
A new effect of red ginseng: suppression of lung cancer metastasis
KIST Gangneung Institute (South Korea), March 3, 2021
Red ginseng, which has long been used as an ingredient in traditional Korean medicine, has recently drawn increased attention as a functional material for its health-promoting effects. The composition and activities of red ginseng vary depending on the processing method, and this has become an active area of research. Recently, a research team in Korea has entered the spotlight as they discovered that red ginseng has inhibitory effects against lung cancer metastasis.
The Korea Institute of Science and Technology (KIST) reported that a joint study conducted by Dr. Jungyeob Ham from the Natural Product Research Center at the KIST Gangneung Institute of Natural Products and Dr. Hyeonseok Ko of Seoul Asan Medical Center revealed that two components of red ginseng, Rk1 and Rg5, can significantly suppress lung cancer metastasis.
Dr. Ham of KIST developed a new microwave processing method for red ginseng that is based on the same principle as a microwave oven, which when compared to existing processing methods, such as repetitive steaming and drying, increases the concentration of the three main active components, Rg3, Rk1, and Rg5, more than 20 times. The research team previously demonstrated that red ginseng produced by this microwave processing method, which they have called KMxG, is effective against prostate, cervical, and skin cancers, and has protective effects against by drug-induced kidney damage. This technology was transferred to Ponin Bio Co., Ltd. in 2020 for a technology fee of KRW 800 million and is currently being developed for commercialization.
Unlike normal cells, which die when separated from their original tissue, cancer cells can spread to other tissues where they invade and grow, in a process called metastasis. TGF-β1, a cytokine protein that functions as a signaling substance in the body, induces lung cancer metastasis and promotes the development of stem cell-like properties in cancer cells. The KIST research team treated lung cancer cells with Rk1 and Rg5, the main components of KMxG red ginseng and showed that both components effectively inhibited various processes related to cancer metastasis induced by TGF-β1.
"Although components of red ginseng previously have been shown to kill cancer cells, this study proved that these components of red ginseng have other anti-cancer effects and can inhibit lung cancer metastasis. This provides scientific evidence that may lead to the future development of anti-cancer drugs derived from natural products," remarked Dr. Ham. He added, "Because we can control the active ingredient contents of red ginseng by using microwave processing methods like the one that produced KMxG, it may be possible to develop customized functional materials for various diseases."
Intermittent fasting promotes anti-anxiety effects
Federal University of Porto Alegre (Brazil), February 28, 2021
According to news reporting originating from Porto Alegre, Brazil, research stated, “Anxiety disorders are linked to mitochondrial dysfunction and decreased neurotrophic support. Since anxiolytic drugs target mitochondria, non-pharmacological approaches to improve mitochondrial metabolism such as intermittent fasting (IF) may cause parallel behavioral benefits against anxiety disorders.”
Our news editors obtained a quote from the research from Federal University, “Here, we investigated whether a chronic IF regimen could induce anxiolytic-like effects concomitantly to modulation in mitochondrial bioenergetics and trophic signaling in mice brain. A total of 44 Male C57BL/6 J mice (180 days old) were assigned to two dietary regimens: a normal, ad libitum diet (AL group) and an alternate-day fasting (IF group), where animals underwent 10 cycles of 24 h food restriction followed by 24 h ad libitum access. Animals underwent the open field test, dark/light box and elevated plus maze tasks. Isolated nerve terminals were obtained from mice brain and used for mitochondrial respirometry, hydrogen peroxide production and assessment of membrane potential dynamics, calcium handling and western blotting. We showed that IF significantly alters total daily food intake and food consumption patterns but not body weight. There were no differences in the exploratory and locomotory parameters. Remarkably, animals from IF showed decreased anxiety-like behavior. Mitochondrial metabolic responses in different coupling states and parameters linked with HO production, Ca buffering and electric gradient were not different between groups. Finally, no alterations in molecular indicators of apoptotic death (Bax/Bcl-2 ratio) and neuroplasticity (proBDNF/BDNF and synaptophysin were observed).”
According to the news editors, the research concluded: “IF exerts anxiolytic-like effect not associated with modulation in synaptic neuronergetics or expression of neurotrophic proteins. These results highlight a potential benefit of intermittent fasting as a nutritional intervention in anxiety-related disorders.”
This research has been peer-reviewed.
Moderate-to-vigorous physical activity and less sitting reduce the risk of diabetes in older adults
University of Oulu (Finland), February 26, 2021
According to a recent study, moderate-to-vigorous physical activity and less sedentary time improve glucose metabolism and reduce the risk of type 2 diabetes in older adults. Based on the results, it is important to encourage older adults to avoid sedentary time and increase moderate-to-vigorous physical activity to improve their glucose metabolism.
The study is part of the population-based Oulu1945 survey conducted in 2013–2015 by the University of Oulu and Oulu Deaconess Institute's Department of Sports and Exercise Medicine, Finland. The survey involved a total of 660 Oulu residents born in 1945 and between the ages of 67 and 69, at that time. Physical activity and sedentary time were measured with a wrist-worn accelerometer for a period of two weeks, and the glucose metabolism was examined using an oral glucose tolerance test. The subjects were divided into the following four profiles based on the amount of moderate-to-vigorous physical activity and sedentary time: "couch potatoes," "light movers," "sedentary actives" and "actives."
"Active" older adults had a lower incidence of type 2 diabetes and prediabetes than older adults in the 'couch potatoes' profile, one in two of whom were found to have a glucose metabolism disorder. The blood glucose and insulin concentrations in the 'active' profile were lower throughout the glucose tolerance test compared to those in the less physically active groups. Older adults in the 'active' profile had a better glucose tolerance and muscle insulin sensitivity than those in the 'couch potatoes' profile, both clear signs of a reduced risk of diabetes.
"Previous surveys have suggested a link between older adults' physical activity and glucose metabolism, but the use of the accelerometer in studies involving older adults has been negligible. In this study, we were able to make a distinction between moderate-to-vigorous physical activity and sedentary time through accelerometry and to then profile the subjects on that basis in different activity profiles. We analyzed the association between the physical activity profile and glucose metabolism, which is a new perspective. By the activity profiles, we can see that, from the point of view of glucose metabolism, physical activity alone is not enough: you should be active and potter about throughout the day," says researcher Miia Länsitie.
The risk of glucose metabolism disorders increases significantly in older age, making it essential to find ways to prevent diabetes in older adults. Based on this study, an active lifestyle, including moderate-to-vigorous physical activity and limited sedentary time, also promotes older adults' glucose metabolism and can play a significant role in preventing diabetes in older people.
"Older adults with long-term illnesses or functional limitations, who may find it impossible to achieve the recommended level of physical activity, should spend less time sitting down and more pottering about every day to enhance their glucose metabolism," Länsitie says.
The right '5-a-day' mix is 2 fruit and 3 vegetable servings for longer life
Harvard Medical School, March 1, 2021
Studies representing nearly 2 million adults worldwide show that eating about five daily servings of fruits and vegetables, in which 2 are fruits and 3 are vegetables, is likely the optimal amount for a longer life, according to new research published today in the American Heart Association’s flagship journal Circulation.
Diets rich in fruits and vegetables help reduce risk for numerous chronic health conditions that are leading causes of death, including cardiovascular disease and cancer. Yet, only about one in 10 adults eat enough fruits or vegetables, according to the U.S. Centers for Disease Control and Prevention.
“While groups like the American Heart Association recommend four to five servings each of fruits and vegetables daily, consumers likely get inconsistent messages about what defines optimal daily intake of fruits and vegetables such as the recommended amount, and which foods to include and avoid,” said lead study author Dong D. Wang, M.D., Sc.D., an epidemiologist, nutritionist and a member of the medical faculty at Harvard Medical School and Brigham and Women’s Hospital in Boston.
Wang and colleagues analyzed data from the Nurses’ Health Study and the Health Professionals Follow-Up Study, two studies including more than 100,000 adults who were followed for up to 30 years. Both datasets included detailed dietary information repeatedly collected every two to four years. For this analysis, researchers also pooled data on fruit and vegetable intake and death from 26 studies that included about 1.9 million participants from 29 countries and territories in North and South America, Europe, Asia, Africa and Australia.
Analysis of all studies, with a composite of more than 2 million participants, revealed:
- Intake of about five servings of fruits and vegetables daily was associated with the lowest risk of death. Eating more than five servings was not associated with additional benefit.
- Eating about two servings daily of fruits and three servings daily of vegetables was associated with the greatest longevity.
- Compared to those who consumed two servings of fruit and vegetables per day, participants who consumed five servings a day of fruits and vegetable had a 13% lower risk of death from all causes; a 12% lower risk of death from cardiovascular disease, including heart disease and stroke; a 10% lower risk of death from cancer; and a 35% lower risk of death from respiratory disease, such as chronic obstructive pulmonary disease (COPD).
- Not all foods that one might consider to be fruits and vegetables offered the same benefits. For example: Starchy vegetables, such as peas and corn, fruit juices and potatoes were not associated with reduced risk of death from all causes or specific chronic diseases.
- On the other hand, green leafy vegetables, including spinach, lettuce and kale, and fruit and vegetables rich in beta carotene and vitamin C, such as citrus fruits, berries and carrots, showed benefits.
“Our analysis in the two cohorts of U.S. men and women yielded results similar to those from 26 cohorts around the world, which supports the biological plausibility of our findings and suggests these findings can be applied to broader populations,” Wang said.
Wang said this study identifies an optimal intake level of fruits and vegetables and supports the evidence-based, succinct public health message of ‘5-a-day,’ meaning people should ideally consume five servings of fruit and vegetable each day. “This amount likely offers the most benefit in terms of prevention of major chronic disease and is a relatively achievable intake for the general public,” he said. “We also found that not all fruits and vegetables offer the same degree of benefit, even though current dietary recommendations generally treat all types of fruits and vegetables, including starchy vegetables, fruit juices and potatoes, the same.”
A limitation of the research is that it is observational, showing an association between fruit and vegetable consumption and risk of death; it does not confer a direct cause-and-effect relationship.
“The American Heart Association recommends filling at least half your plate with fruits and vegetables at each meal,” said Anne Thorndike, M.D., M.P.H., chair of the American Heart Association’s nutrition committee and an associate professor of medicine at Harvard Medical School in Boston. “This research provides strong evidence for the lifelong benefits of eating fruits and vegetables and suggests a goal amount to consume daily for ideal health. Fruits and vegetables are naturally packaged sources of nutrients that can be included in most meals and snacks, and they are essential for keeping our hearts and bodies healthy.”
Mechanisms through which melatonin prevents osteoporosis explore
Natural Science Foundation of Liaoning Province (China), February 26, 2021
According to news reporting from Liaoning, People’s Republic of China, research stated, “Melatonin, secreted in a typical diurnal rhythm pattern, has been reported to prevent osteoporosis; however, its role in osteoclastogenesis remains unclear. In the present study, the ability of melatonin to inhibit receptor activator of nuclear factor-kappa B ligand (RANKL)-induced osteoclastogenesis and the associated mechanism were investigated.”
The news correspondents obtained a quote from the research from China Medical University, “Raw264.7 cells were cultured with RANKL (100 ng/ml) and macrophage colony-stimulating factor (M-CSF; 30 ng/ml) for 7 days, and tartrate-resistant acid phosphatase (TRAP) staining was used to detect osteoclastogenesis following treatment with melatonin. In addition, the effect of melatonin on cathepsin K and microRNA (miR)-882 expression was investigated via western blotting and reverse transcription-quantitative PCR. Melatonin significantly inhibited RANKL-induced osteoclastogenesis in Raw264.7 cells. From bioinformatics analysis, it was inferred that nuclear receptor subfamily 1 group D member 1 (NR1D1/Rev-erb alpha) may be a target of miR-882. In vitro, melatonin upregulated Rev-erb alpha expression and downregulated miR-882 expression in the osteoclastogenesis model. Rev-erb alpha overexpression boosted the anti-osteoclastogenesis effects of melatonin, whereas miR-882 partially diminished these effects.”
According to the news reporters, the research concluded: “The present results indicated that the miR-882/Rev-erb alpha axis may serve a vital role in inhibiting osteoclastogenesis following RANKL and M-CSF treatment, indicating that Rev-erb alpha agonism or miR-882 inhibition may represent mechanisms through which melatonin prevents osteoporosis.”
This research has been peer-reviewed.
Rhythm Of Breathing Key To Controlling Fear And Emotional Behavior
Northwestern University, March 2, 2021
We live in a fearful world with exposure to a deluge of stressors every day. As much as fear is a result of reacting to the actual or perceived events in our lives, it is also a biological function of the human body, and when equipped with an understanding of how the body manages the emotional system, we can easily outsmart it, tricking ourselves into emotional balance.
This perspective is scientifically validated by new research from Northwestern University Feinberg School of Medicine in Chicago Illinois, which discovered how the various rhythmic patterns of breath profoundly impact memory recall and the emotional body, specifically the fear response.
The brain creates electrical impulses which link physical functions to emotional reactions, and the electrical activity of the brain is deeply affected by our breathing patterns. The outcome of this balance is determined by whether or not we are inhaling or exhaling, as well as if we are breathing through the nose or the mouth, as each variable creates a different electrical response within the brain.
In the Northwestern study, participants were shown images of human expressions, some frightful, while engaging in various patterns of breathing. Researchers observed that people more easily process fear, and more readily recall images, while inhaling through the nose.
One of the major findings in this study is that there is a dramatic difference in brain activity in the amygdala and hippocampus during inhalation compared with exhalation. When you breathe in, we discovered you are stimulating neurons in the olfactory cortex, amygdala and hippocampus, all across the limbic system. ~Christina Zelano, assistant professor of neurology at Northwestern University Feinberg School of Medicine and lead author of the study
The amygdala is decisively liked to the processing of emotions, especially those related to fear, while the hippocampus is strongly linked to memory recall, and the breath, which originates with the diaphragm, plays the critical role of regulating their function.
Breathing is modulated at the diaphragm, and it is also the location where many physical symptoms associated with fear and anxiety manifest. ~Brett Wilbanks
The differences in brain activity which occur during unique breathing rhythms were recognized by looking at brain activity during the introduction of fearful or surprising human faces, finding distinctively heightened activity during inhaling. Knowing this can be highly advantageous when you realize that your fear reaction is working overtime.
We can potentially use this fact to our advantage. For example if you’re in a dangerous environment with fearful stimuli, our date indicate that you can respond more quickly if you are inhaling through your nose. ~Christina Zelano
Furthermore, this further validates the importance of meditation, which commonly centers of developing control of the breath in order to quiet the mind and normalize physiological function in the body. The long-term results of a dedicated meditation practice include more stable and optimal emotional reactions to the world around us, indicating again that breathing is a critical component of living a fearless life.
Study: Diet high in poor quality carbohydrates increases heart disease and death
McMaster University (Ontario), February 28, 2021
A global study of people living on five continents has found a diet high in poor quality carbohydrates leads to a higher risk of heart attacks, strokes, and death.
The higher risks of a diet high in poor quality carbohydrates, called a high glycemic diet, were similar whether people had previous cardiovascular disease or not.
The study, published in the New England Journal of Medicine today, is the largest of a geographically and dietary diverse population on this issue, as previous studies have chiefly focused on high income Western countries.
A total of 137,851 people aged 35 to 70 years old were followed for a median of 9.5 years through the Population Urban and Rural Epidemiology (PURE) study run by the Population Health Research Institute (PHRI) of McMaster University and Hamilton Health Sciences.
The research team used food questionnaires to measure long term dietary intake of participants and estimate the glycemic index (the ranking of food based on their effect on blood-sugar levels) and glycemic load (the amount of carbohydrates in a food times its glycemic index) of diets. There were 8,780 deaths and 8,252 major cardiovascular events recorded among the participants during the follow-up period.
The investigators categorized dietary intake of carbohydrates depending on whether specific types of carbohydrates increased blood sugars more than others (high glycemic index) and compared this index to the occurrence of cardiovascular disease or death.
Those people consuming a diet in the highest 20 percent of glycemic index were 50 percent more likely to have a cardiovascular attack, stroke, or death if they had a pre-existing heart condition, or 20 percent more likely to have an event if they did not have a pre-existing condition.
These risks were also higher among those people who were obese.
"I have been studying the impact of high glycemic diets for many decades, and this study ratifies that the consumption of high amounts of poor quality carbohydrates is an issue worldwide," said first author David Jenkins, professor of nutritional sciences and medicine at the University of Toronto's Temerty Faculty of Medicine, who is also a scientist in the Li Ka Shing Knowledge Institute of St. Michael's Hospital, Unity Health Toronto.
"PURE study papers have already indicated that not all carbohydrates foods are the same. Diets high in poor quality carbohydrates are associated with reduced longevity, while diets rich in high quality carbohydrates such as fruit, vegetables and legumes have beneficial effects," he said.
PHRI research investigator Mahshid Dehghan added: "This study also makes it clear that among a diverse population, a diet low in both its glycemic index and load has a lower risk of cardiovascular disease and death."
Most fruits, vegetables, beans, and intact whole grains have a low glycemic index, while white bread, rice, and potatoes have a high glycemic index.
"The present data, along with prior publications from the PURE and several other studies, emphasize that consumption of poor quality of carbohydrates are likely to be more adverse than the consumption of most fats in the diet," said Salim Yusuf, senior author of the study.
"This calls for a fundamental shift in our thinking of what types of diet are likely to be harmful and what types neutral or beneficial."
Yusuf is also the principal investigator of the PURE study, executive director of the PHRI, and a professor of medicine at McMaster.
