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Showing posts with label Diabetes. Show all posts
Showing posts with label Diabetes. Show all posts
Wednesday, 28 February 2018
Diabetes drug increases the weight of fetus
When pregnant women take the common diabetes medication metformin throughout pregnancy, it can positioned their kids at increased hazard of having weight problems or obese. Many pregnant women are taking metformin to deal with gestational diabetes or polycystic ovary syndrome PCOS. PCOS increases the risk of developing diabetes and other metabolic problems.
When pregnant women with PCOS or gestational diabetes take metformin, it crosses the placenta and passed to the fetus. According to Liv Guro Engen Hanem, M.D., of the Norwegian University of Science and Technology in Trondheim, Norway, the children of pregnant women who took metformin or placebo during pregnancy are at risk of weight gain.
Researchers invited parents of 292 children who participated in previous randomized scientific trials to be part of the study. In the preceding trials, pregnant women with PCOS were assigned to take either metformin or a placebo during pregnancy, the researchers wound up reviewing frame mass index BMI and other measurements for 161 children born following the advance studies.
At age four, the children whose mothers had been randomized to metformin at some point of being pregnant tended to weigh greater than the children whose mother took the placebo despite the fact that metformin did not appear to have an effect on birth weight, the trend became apparent whilst children reached six months of age. At age four, the children in metformin group had higher BMI scores and were much more likely to satisfy the criteria for weight problems or overweight than children in placebo group.
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Friday, 23 February 2018
Anesthesia may triggers asymptomatic brain changes
Patients who were given general anesthesia before surgery performed slightly worse on memory tests, this was due to cognitive changes in the brain related to immediate memory, or the ability to remember information over a brief period. 'The cognitive changes after surgery are small-probably asymptomatic and beneath a person's awareness,' said senior author Dr Kirk Hogan, a professor of anesthesiology at the University of Wisconsin-Madison.
For the study, Dr Hogan and his colleagues measured memory and executive function in 964 participants, with the average age of 54, who had no signs of Alzheimer's disease, dementia, or cognitive impairment before surgery. Of the participants, 312 of them had at least one surgical procedure performed and 652 of them did not. Researchers found there was a decline in immediate memory over the course of four years in participants who had surgery.
Memory became abnormal in 18 percent of those who had at least one surgical procedure compared with 10 percent of those who had not. Regarding the working memory test, surgery and anesthesia were associated with a decline in immediate memory by one point out of a possible maximum test score of 30 points. They found no differences in other measures of memory and executive function between those who had surgery and their counterparts.
Patients having surgery and anesthesia are likely to experience impaired performance on neuropsychological tests of memory and executive function, an association that might be causal. Researchers found the activity of memory loss receptors remains high long after the drugs have been eliminated from the patient's body. Other risk factors like the sort of disease or illness a person have could impact brain function. Diseases like hypertension and diabetes may also be responsible for cognitive decline in patients who have had surgery.
haleplushearty.blogspot.com
Monday, 19 February 2018
Link between gut and type 1 diabetes
Scientists have found that targeting micro-organisms in the gut, known as microbiota, could have the potential to prevent type 1 diabetes. University of Queensland researcher Dr. Emma Hamilton-Williams investigated differences in the gut microbiota, comparing those susceptible to type 1diabetes to those protected against the autoimmune disease.
This research has shown there is a genetic component to microbiota and the immune response involved in regulating it, this means that changes in the microbiota in type 1 diabetes occur before symptoms develop, and are not just a side-effect of the disease. Therapies targeting the microbiota could therefore have the potential to help prevent type 1 diabetes in the future.
An immunotherapy targeting T-cells associated with type 1 diabetes resulted in dramatic changes in the gut biology and altered the microbiota in mice models. Genetic susceptibility and change in immune system function led to alterations in the microbiota. The implications are that a person's genetics contribute to an unhealthy microbiota as well as their diet.
haleplushearty.blogspot.com
Wednesday, 14 February 2018
How brain regulates fat burning
Scientists have discovered a molecular switch in the brain that regulates fat burning and could provide a way to control weight gain following dieting. Monash University researchers have identified a molecular switch in the brain that potentially controls the human body's capacity to store fat, particularly after long periods of "famine" or weight loss-a process that underlies yo-yo dieting, where the body regain the weight lost caused by dieting.
Being able to control this switch may be a therapy for obesity and other metabolic disorders such as Type 2 diabetes. Associate Professor Zane Andrews and his colleagues at the Monash Biomedicine Discovery Institute have identified a protein in mice, called carnitine acetyltransferase (Crat), in hunger-processing brain cells that regulate fat storage after dieting.
During dieting, the body burn more fat to provide enough energy. But at the same time the brains fight to conserve energy and, as soon as food becomes available, the body switches from burning to storing fat and instead uses ingested calories from food.
The international research team discovered the Crat protein and developed a mouse that had this protein genetically switched off. These mice, when fasted or fed after a fast, consume their fat reserves at a greater than normal rate.
Repeated dieting, or yo-yo dieting, may lead to weight gain because the brain interprets these diets as short famines and urges the person to store more fat for future shortages. For the first time the Crat protein in hunger-processing brain cells has been identified as the switch that instructs the body to replace the lost weight through increased fat storage.
Manipulating this protein offers the opportunity to trick the brain and not replace the lost weight through increased appetite and storage of fat, regulating this protein can ensure that diet-induced weight loss stays off rather than sneaking back.
haleplushearty.blogspot.com
Effects of soda on fertility
Consumption of beverages has been linked to weight gain, type 2 diabetes, early menstruation, poor semen quality and infertility. A new study led by Boston University School of Public Health (BUSPH) researchers has found that the intake of one or more sugar-sweetened beverages per day is associated with a decreased chance of getting pregnant.
There are links between intake of sugar-sweetened beverages and low fertility, which were consistent after controlling for many other factors, including obesity, caffeine intake, alcohol, smoking, and overall diet quality. Couples planning a pregnancy might consider limiting their consumption of these beverages, especially because they are also related to other adverse health effects.
Risk factors for infertility including diet, could help couples conceive more quickly and reduce the psychological stress The researchers surveyed 3,828 women aged 21 to 45 living in the United States or Canada and 1,045 of their male partners.
Participants completed a comprehensive baseline survey on medical history, lifestyle factors, and diet, including their intake of sugar-sweetened beverages. Female participants then completed a follow-up questionnaire every two months for up to 12 months or until pregnancy occurred.
Both female and male intake of sugar-sweetened beverages was associated with 20 percent reduced fecundability, the average monthly probability of conception. Females who consumed at least one soda per day had 25 percent lower fecundability; male consumption was associated with 33 percent lower fecundability. Intake of energy drinks was related to larger reductions in fertility, although the results were based on small numbers of consumers.
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Wednesday, 7 February 2018
Environmental influence can change gene behaviour
In a study of pregnant women, a team of Deakin scientists has shown in humans for the first time that pregnancy can induce long-term epigenetic changes to human body, with major implications for understanding, preventing and treating disease. Deakin University scientists have discovered that pregnancy can cause long-term changes to the way women's genes behave, which could affect the health of mother and children.
The findings of a recent study from Deakin's Centre for Cellular and Molecular Biology, within the School of Life and Environmental Sciences, showed women experience major molecular changes during pregnancy that could remain with them after their pregnancy has ended. The changes are "epigenetic"-they are not a mutation of the gene's structure, but a change to how genes behave.
Long-term epigenetic changes can lead to increased risks of disease for the next generation. Studies have previously shown the offspring of women with diabetes have an increased risk of developing obesity, glucose intolerance and type 2 diabetes. Epigenetic markers act like a switch that can alter the activity of genes and cells in the body. All individual cells have the same genetic material, but the behaviour of a gene is different in different tissues of the body. That behaviour can be determined by epigenetic factors, independent of the DNA sequences of the genes.
Epigenetics has implications for understanding, preventing and combatting many diseases, from diabetes to cancer, providing understanding of how adverse environmental factors, including lifestyle, can cause disease. Researchers compared groups of never-pregnant women, pregnant women, and women at 20 weeks postpartum, and made comparisons between the same groups of women at pregnancy, at eight to 10 weeks postpartum, and at 20 weeks postpartum. Similar comparisons were carried out among women with type 2 diabetes.
A significant finding was that women with type 2 diabetes had different epigenetic profiles from non-diabetic women, and their profiles underwent different changes during pregnancy. Pregnancy-induced epigenetic changes could lead to complications among these women with diabetes, such as downstream effects that may contribute to insulin resistance, as well as high risk pregnancy outcomes. Maternal malnutrition and other adverse events in pregnancy can cause problems for the next generation due to epigenetics.
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Wednesday, 31 January 2018
Vitamin D could prevent cardiovascular damage
A new study conducted by Ohio University scientists suggests that a little more sunlight might restore damage to cardiovascular system. The study shows that vitamin D3 which is made by the body naturally when skin is exposed to the sun can significantly restore the damage to the cardiovascular system caused by several diseases like hypertension, diabetes and atherosclerosis.
Vitamin D3 is associated with the bones. However, in recent years, in clinical settings people recognize that many patients who have a heart attack will have a deficiency of D3. It doesn't mean that the deficiency caused the heart attack, but it increased the risk of heart attack. Nanosensors shows that vitamin D3 can be beneficial, especially for the function and restoration of the cardiovascular system.
A major discovery from these studies is that vitamin D3 is a powerful stimulator of nitric oxide (NO), which is a major signaling molecule in the regulation of blood flow and the prevention of the formation of clots in the cardiovasculature. Additionally, vitamin D3 significantly reduced the level of oxidative stress in the cardiovascular system. Treatment with vitamin D3 can significantly restore the damage to the cardiovascular system caused by several diseases, including hypertension, atherosclerosis, and diabetes, while also reducing the risk of heart attack.
These studies, performed at Ohio University, are the first to identify the molecular mechanism of vitamin D3-triggered restoration of the function of damaged endothelium in the cardiovasculature. While these studies were performed using a cellular model of hypertension, the implication of vitamin D3 on dysfunctional endothelium is broader. The dysfunction of endothelium is a common denominator of several cardiovascular diseases, particularly those associated with ischemic events.
Vitamin D3 may be of clinical importance in the restoration of dysfunctional cardiac endothelium after heart attack, capillary endothelium after brain ischemia (stroke), hypovolemia, vasculopathy, diabetes and atherosclerosis. This suggestion is strongly supported by several clinical studies which indicate that vitamin D3 at doses higher than those currently used for the treatment of bone diseases, may be highly beneficial for the treatment of the dysfunctional cardiovascular system.
haleplushearty.blogspot.com
Monday, 29 January 2018
How diabetes causes fracture
Type 2 diabetes is known to be a risk factor for bone fractures. New research in animal models by a team of scientists at UC San Francisco, UC Davis, and UC Berkeley suggests that the disease compromises the collagen within bones, making the bones less flexible and more likely to break.
Journal of Bone and Mineral Research.
Adults with Type 2 diabetes have a higher fracture risk for a given bone density, which is otherwise the main clinical predictor of fracture risk. This is a widespread and growing issue now that these individuals are living longer with better insulin management.
Fields and colleagues looked at factors outside of bone density that could explain bone fragility in diabetes. In healthy bones, networks of collagen fibers stretch and slide in response to strain, which helps the bones resist cracking. But hyperglycemia in diabetes leads to the accumulation of advanced glycation end products, which bind collagen fibers to each other and impair their stretching and sliding, according to the new findings.
The researchers examined bones from the lower back and forearm of lean, obese and diabetic obese rat models. They imaged the bones with high-resolution CT scans, tested their biomechanical properties, and measured the collagen networks' response to strain using small-angle X-ray scattering at the Lawrence Berkeley National Laboratory Advanced Light Source.
They then simulated the contribution of these various factors to bone strength using supercomputers at the Texas Advanced Computing Center at the University of Texas. Both the obese rats and the diabetic obese rats had overall weaker bones for a given bone mineral content. In obese rats, the reduced strength was attributable to structural deficits, such as changes to the microarchitecture of the bones and inefficient distribution of bone mass.
In the diabetic obese rats, however, these structural deficits were compounded by material deficits -changes to the collagen networks that were previously not well documented. By comparing the obese rats with the diabetic obese rats, the researchers could isolate the effect of hyperglycemia on bone fragility. In the forearm bones, for example, the collagen changes were responsible for significant reductions in the elastic, yield and ultimate tensile properties of the bone tissue.
The researchers note that they did not study animals with an advanced duration and severity of diabetes, which may limit generalizability, but they expect that long-term diabetes would only further impair bone strength.
haleplushearty.blogspot.com
Saturday, 27 January 2018
Reversing insulin resistance
Researchers at Vanderbilt University have discovered how insulin crosses the capillary endothelium to exit blood vessels and stimulate skeletal muscle cells-a major finding that may lead to new ways to reverse insulin resistance, a hallmark of type 2 diabetes. This was made possible by the development of a novel microscopy technique which allowed measurement of insulin movement across the endothelial wall of skeletal muscle capillaries in the mouse.
One of insulin's key functions is to stimulate glucose uptake by muscle, where it is stored or used as fuel. To stimulate glucose uptake insulin must cross the endothelial barrier into muscle tissue. Impaired delivery of insulin into tissue is a key feature of insulin resistance and type 2 diabetes.
Using a quantitative intravital fluorescence microscopy technique they developed combined mathematical modeling, the researchers showed that insulin moves across the endothelium by fluid-phase transport. Such movement is not dependent on the presence of endothelial insulin receptors or limited by saturation of endothelial transport processes, as had been hypothesized previously.
Better understanding of the variables controlling insulin movement across the endothelial wall could lead to improved strategies for reversing insulin resistance, including development of small molecules that enhance insulin delivery or novel insulin analogs that can access muscle more easily. The fluorescence microscopy technique developed for these studies can be applied to other drugs and hormones to study molecular access to a range of tissues.
haleplushearty.blogspot.com
Thursday, 18 January 2018
Secret of longevity protein
Klotho proteins play an important role in the regulation of longevity and metabolism. In a recent Yale-led study, researchers revealed the three-dimensional structure of one of these proteins, beta-Klotho, illuminating its intricate mechanism and therapeutic potential. The study findings could have implications for therapies developed to treat a wide range of medical conditions, including diabetes, obesity, and certain cancers, the researchers said.
The Klotho family of two receptor proteins are located on the surface of cells of specific tissues. The proteins bind to a family of hormones, designated endocrine FGFs, that regulate critical metabolic processes in the liver, kidneys, and brain, among other organs. To understand how beta-Klotho works, the research team used X-ray crystallography, a technique that provides high-resolution, three-dimensional views of these proteins.
The researchers' analysis yielded several insights. First, beta-Klotho is the primary receptor that binds to FGF21, a key hormone produced upon starvation. When bound to beta-Klotho, FGF21 stimulates insulin sensitivity and glucose metabolism, causing weight loss. This new understanding of beta-Klotho and FGF21 can guide the development of therapies for conditions such as type 2 diabetes in obese patients.
Like insulin, FGF21 stimulates metabolism including glucose uptake. In animals and in some clinical trials of FGF21, it shows that you can increase burning of calories without changing food intake, and we now understand how to improve the biological activity of FGF21.
haleplushearty.blogspot.com
Wednesday, 17 January 2018
Breastfeeding reduces the risk of diabetes
Breastfeeding for six months or longer reduces the risk of developing type 2 diabetes nearly in half for women throughout their childbearing years, according to new Kaiser Permanente research in JAMA Internal Medicine. There is a very strong association between breastfeeding duration and lower risk of developing diabetes.
Women who breastfed for six months or more across all births had a 47 percent reduction in their risk of developing type 2 diabetes compared to those who did not breastfeed at all. Women who breastfed for six months or less had a 25 percent reduction in diabetes risk. Researchers analyzed data during the 30 years of follow up from the Coronary Artery Risk Development in Young Adults (CARDIA) study.
The new findings add to a growing body of evidence that breastfeeding has protective effects for both mothers and their offspring, including lowering a mother's risk of breast and ovarian cancer. The long-term benefits of breastfeeding on lower diabetes risk were similar for black women and white women, and women with and without gestational diabetes.
Black women were three times as likely as white women to develop diabetes within the 30-year study, which is consistent with higher risk found by others. Black women enrolled in CARDIA were also less likely to breastfeed than white women.
The incidence of diabetes decreased in a graded manner as breastfeeding duration increased, regardless of race, gestational diabetes, lifestyle, body size, and other metabolic risk factors measured before pregnancy. Mothers who breastfeed for months after their delivery, may be reducing their risk of developing type 2 diabetes as they get older.
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Saturday, 13 January 2018
Sitting for long hours linked to visceral fat
Sitting for long hours leads to building of fat around the body's organs and increases the risk of type 2 diabetes and heart disease. A study found people who spent a large amount of time sitting down had higher levels of visceral and total abdominal fat. Visceral fat is unseen and wrapped around the liver, pancreas and kidneys. Carrying a high amount is known to be associated with insulin resistance - the driving factor for type 2 diabetes.
There's a difference between subcutaneous fat, the type of fat that lies directly under the skin and visceral fat, which is unseen and around human organs. According to an expert, slim-looking people can have this dangerous fat on the inside, that's wrapped around the liver, pancreas and kidneys.
Visceral abdominal fat is also linked to an increased risk of cancer, stroke and heart disease. Researchers used MRI to scan participants who were likely to develop type 2 diabetes. They also used ccelerometers that were placed around their waists to measure how much time these people spent sitting over the course of a week.
The researchers found that the link between visceral fat and sitting was strongest for those who did not meet the public health recommendation of 150 weekly minutes of moderate-intensity physical activity. Using MRI techniques and physical activity monitors have shown that the more time spent sedentary, the stronger the association with higher levels of internal and abdominal fat. This was particularly so if the long periods of sedentary behavior were uninterrupted.
When cortisol the stress hormone is too high for too long, it can increase the amount of fat that's stored around the stomach. Dieting alone is not enough combining healthy eating with stress management techniques can help. Cortisol is created in the body’s adrenal gland, it is essential to give get-up-and-go human need to get motivated and focused, which is why it’s usually elevated in the morning. It's also released during exercise and periods of acute stress. It regulates energy by selecting the right amount of carbohydrate, fat, or protein the body needs to meet the physiological demands placed on it.
Cortisol is released from the body’s adrenal glands and floods the body with glucose when the body is stressed, the simplest form of carbohydrate and preferred energy source – to give muscles an immediate supply of energy. Insulin-the hormone that reduces blood sugar – is also released to prevent the glucose being stored as fat and make it freely available to give the immediate energy to deal with an event. Hormone balance will returns to normal when stress is reduce.
haleplushearty.blogspot.com
Friday, 12 January 2018
Control diabetes with diet and exercise
According to latest research, dieting and regular exercise can be more effective at controlling type 2 diabetes than medication. Patients who take part in weight loss programmes are less likely to need drugs and tend to have healthier blood sugar levels. Regular exercise and cognitive behavioural therapy helps people to lose weight.
A sensible diet can control diabetes more effectively than drugs, people who completed the weeks regime saw no increase in the diabetes pills they had to take. They were also half as likely to see their condition progress to the extent that they needed to take insulin.
A single workout could save your life, diabetes sufferers who lost at least 11lb also had a significant reduction in their blood sugar levels in the following three years. A real-life structured weight management intervention can reduce weight in the medium term, result in improved glycaemic control with fewer medications, and may be more effective than pharmacological alternatives.
The course involved 90-minute classes every fortnight for four months, in which patients were given exercise advice and told to follow a diet of 1,400 calories a day for women and 1,900 a day for men.
They also underwent cognitive behavioural therapy to help them lose weight. Study leader Dr Jennifer Logue, from the University of Glasgow, said: ‘This is the first real-world study to show that the lifestyle weight management programmes delivered in the NHS can have a long-lasting meaningful clinical effect.’
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Saturday, 6 January 2018
Excess fat upsets heart cells
A University of Iowa study has identified how excess fat in the heart, a common feature in diabetes and obesity, can harm the cells' essential ability to produce energy. Researchers believe the mechanism may contribute to the two- to five-fold increased risk of heart failure in people with diabetes. The heart is the most energy-hungry organ in the body. Just like a combustion engine burning fuel to power the pistons, healthy heart cells consume fuel molecules to create the necessary energy to keep the heart pumping.
This essential energy production takes place inside mitochondria, the self-contained "powerplant" organelles inside cells. Although mitochondria in a healthy heart primarily use fatty acids as fuel, they can easily adapt to use other fuel molecules as needed, including glucose, lactate, and ketone bodies. Diabetes, however, reduces the heart muscle's metabolic adaptability and causes heart cells to overuse fat as a metabolic fuel.
Cardiac lipid overload leads to numerous small, misshapen mitochondria that don't produce energy as efficiently as normal mitochondria. Previous research from the UI team has suggested that problems with mitochondrial energy production may play a role in heart failure associated with diabetes. Diabetes increases the risk of heart failure and one of the cardinal manifestations of the hearts of people with diabetes is the tendency to overuse fat as a metabolic fuel, which ultimately leads to mitochondrial and cardiac damage.
Increasing the amount of fat (lipid) that the heart consumes leads to dramatic changes in the structure and function of the mitochondria in the heart. These studies provide a new window into how these changes to mitochondria could occur in the lipid-overloaded heart. The UI team used genetically modified mice that mimic the increased fatty acid uptake (lipid overload) that characterizes diabetes to investigate the consequences of cardiac lipid overload on mitochondria. A novel 3-D electron microscopic cellular imaging technique developed by colleagues in Germany allowed the researchers to directly observe the structural changes to the mitochondria - rather like putting on a virtual reality headset inside the cardiac muscle cell.
In the mouse model, lipid uptake to heart is doubled. This modest increase resulted in mitochondria that became thinner and more twisted than mitochondria in healthy heart cells. These structural changes (almost like a noodle snaking through the heart) lead to an appearance of mitochondrial fragmentation when imaged by conventional electron microscopy. The study also revealed the molecular cause of the change in mitochondrial structure. Prolonged lipid overload leads to increased levels of damaging substances called reactive oxygen species (ROS). The excess ROS disrupts the mitochondrial network by altering the activity of several important proteins that help control the size and shape of mitochondria.
Removing the excess ROS by overexpressing a molecule that helps "mop up" ROS molecules restored normal-looking mitochondria, which worked properly, despite the lipid overload. Using the same approach to remove ROS in normal heart cells led to mitochondria that were four times as large as normal, suggesting that ROS levels are inversely proportional to mitochondria size. The findings suggest that cardiac lipid overload disrupts normal mitochondrial structure, which may impair energy production and compromise heart function.
haleplushearty.blogspot.com
Gene therapy for type 1 diabetes
Type 1 diabetes is a chronic disease in which the immune system attacks and destroys insulin-producing beta cells in the pancreas, resulting in high blood levels of glucose. A gene therapy approach can lead to the long-term survival of functional beta cells as well as normal blood glucose levels for an extended period of time in mice with diabetes. The researchers used an adeno-associated viral (AAV) vector to deliver to the mouse pancreas two proteins, Pdx1 and MafA, which reprogrammed plentiful alpha cells into functional, insulin-producing beta cells.
A clinical trial in both type 1 and type 2 diabetics in the immediate foreseeable future is quite realistic, given the impressive nature of the reversal of the diabetes, along with the feasibility in patients to do AAV gene therapy. Approximately 9% of the world's adult population has diabetes, which can cause serious health problems such as heart disease, nerve damage, eye problems, and kidney disease.
One fundamental goal of diabetes treatment is to preserve and restore functional beta cells, thereby replenishing levels of a hormone called insulin, which moves blood glucose into cells to fuel their energy needs. But in patients with type 1 diabetes, beta-cell replacement therapy is likely doomed to failure because the new cells might fall victim to the same autoimmunity that destroyed the original cells.
A potential solution to this problem is to reprogram other cell types into functional beta-like cells, which can produce insulin but are distinct from beta cells and therefore are not recognized or attacked by the immune system. To explore the feasibility of this approach, Gittes and first author Xiangwei Xiao of the University of Pittsburgh School of Medicine engineered an AAV vector to deliver to the mouse pancreas proteins called Pdx1 and MafA, which support beta cell maturation, proliferation, and function.
The goal was to generate functional beta-like cells from pancreatic alpha cells, which may be the ideal source for beta cell replacement. For example, alpha cells are plentiful, resemble beta cells, and are in the correct location, all of which could facilitate reprogramming.
By comparing the gene expression patterns of normal beta cells and insulin-producing cells derived from alpha cells, the researchers confirmed nearly complete cellular reprogramming. This gene therapy approach restored normal blood glucose levels in diabetic mice for an extended period of time, typically around four months, and the new insulin-producing cells derived almost exclusively from alpha cells. Moreover, the strategy successfully generated functional insulin-producing cells from human alpha cells.
The viral gene therapy appears to create these new insulin-producing cells that are relatively resistant to an autoimmune attack. This resistance appears to be due to the fact that these new cells are slightly different from normal insulin cells, but not so different that they do not function well. Several features of this approach could facilitate translation to humans. For one, AAV vectors like those used in this study are currently undergoing various gene therapy trials in humans.
Moreover, the viral vectors can be delivered directly to the human pancreas through a routinely performed non-surgical endoscopic procedure; however, this procedure can elicit pancreatic inflammation. In addition, no immunosuppression is required, so patients would avoid related side effects such as an increased risk of infection. However, one major concern was that the mice did eventually return to the diabetic state, suggesting that this treatment would not represent a definitive cure for the disease.
haleplushearty.blogspot.com
Saturday, 30 December 2017
Kidney disease can cause diabetes
Urea plays a role in the two-way link between the two diseases. Urea comes from the breakdown of protein in food. Kidneys normally remove urea from the blood, but poor kidney function can lead to increased levels of urea.
The study involved the analysis of medical records of adults who did not have diabetes. About 9 percent had elevated urea levels, a sign of reduced kidney function. That's the same rate as in the general population, according to the researchers.
People with high urea levels were 23 percent more likely to develop diabetes than those with normal urea levels, the study found. Diabetes is a major risk factor for kidney disease, elevated levels of urea, also raises the risk of diabetes.
When urea builds up in the blood because of kidney dysfunction, increased insulin resistance and impaired insulin secretion often result.
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Thursday, 28 December 2017
Segluromet for treating type 2 diabetes
FDA Approves Segluromet (ertugliflozin and metformin hydrochloride) for Type 2 Diabetes. Segluromet is indicated as an adjunct to diet and exercise to improve glycemic control in adults with type 2 diabetes mellitus who are not adequately controlled on a regimen containing ertugliflozin or metformin, or in patients who are already treated with both ertugliflozin and metformin.
Segluromet is not recommended in patients with type 1 diabetes mellitus or for the treatment of diabetic ketoacidosis. The labeling for Segluromet contains a boxed warning for lactic acidosis. Segluromet is contraindicated in patients with severe renal impairment, end-stage renal disease or on dialysis, acute or chronic metabolic acidosis, including diabetic ketoacidosis, or a history of a serious hypersensitivity reaction to Segluromet, ertugliflozin or metformin hydrochloride.
Segluromet combines 2.5 mg or 7.5 mg of ertugliflozin with 500 mg or 1,000 mg of metformin hydrochloride. Risk factors for metformin-associated lactic acidosis include renal impairment, concomitant use of certain drugs (e.g., carbonic anhydrase inhibitors such as topiramate), age 65 years old or greater, having a radiological study with contrast, surgery and other procedures, hypoxic states (e.g., acute congestive heart failure), excessive alcohol intake, and hepatic impairment.
If metformin-associated lactic acidosis is suspected, immediately discontinue Segluromet (ertugliflozin and metformin hydrochloride) and institute general supportive measures in a hospital setting. Prompt hemodialysis is recommended. Ketoacidosis, a serious life-threatening condition requiring urgent hospitalization, has been reported in patients with type 1 and type 2 diabetes receiving SGLT2 inhibitors, including ertugliflozin. Some cases were fatal. Assess patients with signs and symptoms of metabolic acidosis for ketoacidosis, regardless of blood glucose level. If ketoacidosis is suspected, Segluromet should be discontinued, patient should be evaluated, and prompt treatment should be instituted.
Before initiating Segluromet, consider risk factors for ketoacidosis, including pancreatic insulin deficiency from any cause, caloric restriction, and alcohol abuse. In patients treated with Segluromet, consider monitoring for ketoacidosis and temporarily discontinuing Segluromet in clinical situations known to predispose to ketoacidosis (e.g., prolonged fasting due to acute illness or surgery).
Segluromet causes intravascular volume contraction and can cause renal impairment.
There have been reports of acute kidney injury, some requiring hospitalization and dialysis, in patients receiving SGLT2 inhibitors. Before initiating Segluromet, consider factors that may predispose patients to acute kidney injury. Consider temporarily discontinuing Segluromet in any setting of reduced oral intake or fluid losses; monitor patients for signs and symptoms of acute kidney injury. If acute kidney injury occurs, discontinue Segluromet promptly and institute treatment.
haleplushearty.blogspot.com
Thursday, 14 December 2017
Kidney disease increases the risk of diabetes
Diabetes is known to increase the risk of kidney disease, kidney dysfunction also increases the risk of diabetes. The two-way relationship between kidney disease and diabetes is urea. The nitrogen-containing waste product in blood comes from the breakdown of protein in foods.
Kidneys normally remove urea from the blood, but it can build up when kidney function slows down. The findings are significant because urea levels can be lowered through medication, diet-for example, by eating less protein-and other means, thereby allowing for improved treatment and possible prevention of diabetes.
When urea builds up in the blood because of kidney dysfunction, increased insulin resistance and impaired insulin secretion often result. Researchers evaluated the records of different adults without diabetes over a five-year period, blood test that measures the amount of urea nitrogen found in the blood showed that some of them had elevated urea levels, signaling poor kidney function.
haleplushearty.blogspot.com
Diabetes in pregnancy affects fetus heart
Researchers have discovered how high glucose levels-whether caused by diabetes or other factors keep heart cells from maturing normally, this shows the reason why babies born to women with diabetes are more likely to develop congenital heart disease. When developing heart cells are exposed to high levels of glucose, the researchers found, the cells generate more building blocks of DNA than usual, which leads the cells to continue reproducing rather than mature.
High blood sugar levels are not only unhealthy for adults; they're unhealthy for developing fetuses. the leading non-genetic risk factor for congenital heart disease is a mother having diabetes during pregnancy. Babies born to women with high levels of glucose in their blood during pregnancy are two to five times more likely to develop the disorder than other babies. However, researchers have never been able to define the precise effect of glucose on the developing fetus.
Researchers used human embryonic stem cells to grow heart cardiomyocin and then exposed them to varying levels of glucose. Cells that were exposed to small amounts of glucose matured normally. But cardiomyocytes that had been mixed with high levels of glucose matured late or failed to mature altogether, and instead generated more immature cells. The researchers discovered that, when exposed to extra glucose, the cardiomyocytes over-activated the pentose phosphate pathway -a cellular process that, among other things, generates nucleotides, the building blocks of DNA.
In cells with high glucose levels, the pentose phosphate pathway made more nucleotides than usual. The scientists showed that the excess of building blocks kept the cells from maturing. By depleting glucose at the right point in development, we can limit the proliferation of the cells, which coaxes them to mature and makes the heart muscle stronger, The same thing occurred in pregnant mice with diabetes-the heart cells of fetuses divided quickly but matured slowly.
haleplushearty.blogspot.com
Anti-stress compound reduces obesity and diabetes
Stress protein found in muscle has a diabetes promoting effect. For some time, researchers have known that the protein FKBP51 is associated with depression and anxiety disorders. It is involved in the regulation of the stress system – when the system does not function properly; mental disorders may develop. Now, researchers have discovered a new, surprising role for this protein: It acts as a molecular link between the stress regulatory system and metabolic processes in the body.
FKBP51 influences a signaling cascade in muscle tissue, which with excessive calorie intake leads to the development of glucose intolerance- the key indicator of diabetes type 2. An unhealthy diet, rich in fat means stress for the body. If FKBP51 is increasingly produced in the muscle it leads to reduced absorption of glucose – as a result, diabetes and obesity may develop.
If FKBP51 is blocked, diabetes will not develop, even if too many calories are consumed or the body is still stressed. Less FKBP51 in the muscle tissue means reduced glucose intolerance and thus maintenance of normal metabolism. The protein FKBP51 can be pharmacologically blocked by antagonist compounds
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