Prof. Timothy Frayling[/caption]
Professor Timothy Frayling PhD
Professor of Human Genetics
University of Exeter Medical School
Exeter, UK
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: We know that genes and environmental factors influence our Body mass index. We know less about if and how they interact.
We wanted to answer the question of whether or not aspects of the environment and our lifestyles accentuate any genetic predisposition to obesity. The question is important as it may highlight aspects of the environment that cause some people to be particularly susceptible to gaining weight. Previous, separate, studies have suggested that specific aspects of the environment are to blame. These included sugary drinks, fried food and TV watching.
Elisa Benetti, PhD[/caption]
MedicalResearch.com Interview with:
Dr. Elisa Benetti PhD
Department of Drug Science and Technology
University of Turin
Turin, Italy
MedicalResearch.com: What is the background for this study?
Response: The idea for this study comes from the debate on the role of vitamin D supplementation in the prevention or progression of type 2 diabetes (T2DM). Epidemiological data point at a strong association between vitamin D deficiency and T2DM prevalence, however a causal relationship is still lacking.
Here we wanted to explore the effect of vitamin D administration on insulin-sensitivity, particularly focusing on skeletal muscle, which is a crucial tissue in the maintenance of glucose homeostasis and which was suggested to be a tissue target of vitamin D.
Using a murine model of insulin-resistance induced by a High Fat-High Sugar Diet (HFHS), we demonstrated that a vitamin D supplementation (7 μg•kg-1, i.p. three times/week) was able to revert the deleterious effects evoked by the diet, including the increase in body weight and in the HOMA-IR (a parameter of insulin resistance) and the glucose tolerance impairment. Consistently, at the muscle level, vitamin D increased the insulin sensitivity by reducing tissue inflammation and fat accumulation (myosteatosis).
These effects are due, at least in part, to the inhibition exerted by vitamin D on carboxymethyl-lysine (CML) production, one of the main Advanced Glucose End-products (AGEs), and on its receptor RAGE.
Collectively, our data indicate the ability of vitamin D to reduce the development of muscle insulin resistance, the primary defect in T2DM patients.
Prof. Cathy Lloyd[/caption]
Dr Cathy E. Lloyd
Professor of Health Studies
School of Health, Wellbeing and Social Care
Faculty of Wellbeing, Education and Language Studies
The Open University
Milton Keynes UK
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: We know from earlier epidemiological research that people with diabetes have an increased risk of developing depression and other mental health problems compared to those without diabetes. However the impact of this and what treatment and care should be provided is still unclear, in particular in countries other than the US or the UK.
Our study aims to redress that imbalance, collecting data on diabetes and depression in 16 countries across the globe.
Ours is the first study to measure depressive symptoms but also use a standardised clinical interview to diagnose depression according to ICD criteria.
Overall 10.6% received a diagnosis of Major Depressive Disorder (MDD), however prevalence rates differed widely between countries with 1% diagnosed with MDD in Uganda and nearly 30% in Bangladesh. Twenty-five percent reported subthreshold levels (PHQ-9 score 5 -9) of depression. Those with MDD were significantly more likely to be female and living in an urban rather than rural location (p<0.001). Age and duration of diabetes did not significantly differ between those with and without MDD. Multi-variable analyses demonstrated that while controlling for country, a diagnosis of MDD was significantly associated with female sex, lower education, taking insulin, less exercise, higher levels of diabetes-related distress and a previous diagnosis of MDD. A negligible proportion of those with either MDD or subthreshold levels of depression had a diagnosis or any treatment for their depression recorded in their medical records.
Dr. Samiul Mostafa[/caption]
Dr. Samiul Mostafa
Honorary Clinical Lecturer
Diabetes Trials Unit
University of Oxford
MedicalResearch.com: What is the background for this study?
Response: In managing people with Type 2 diabetes mellitus (T2DM), international guidelines recommend individualisation of HbA1c (glucose) targets for long term maintenance; however, few data are available on the potential
benefits that different blood sugar control targets might achieve.
Therefore, there is a need to learn more about the incremental benefits
of progressively lowering blood sugar levels.
In this computer modelling study, we used the UKPDS Outcomes Model
version 2.0 to estimate 10-year event rates for myocardial infarction
(MI, heart attack), stroke, blindness and amputation by entering
baseline risk factor variables (for example, weight, height,
LDL-cholesterol, systolic blood pressure) taken from a for a current
population of 5766 people with T2DM. Complication rates were estimated
with HbA1c levels held constant at 10%, 9%, 8%, 7% and 6% for each
individual whilst maintaining their risk factors at their baseline
values. Standard statistical methods were used to calculate relative
risk reductions of complications at each HbA1c level.
In-Seok-Song[/caption]
In-Seok Song, DDS, PhD
Clinical Assistant Professor
Oral and Maxillofacial Surgeon
Department of Dentistry, Korea University Anam Hospital,
Seoul, Republic of Korea
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Periodontitis is a well-known cause of various systemic diseases including cardiovascular disease, type 2 diabetes. As for type 2 diabetes, insulin resistance is responsible for the low-grade systemic inflammation, which can deteriorate body function throughout pancreatic β-cell dysfunction and impaired fasting glucose. There are emerging evidences that insulin resistance is a cause of periodontal disease progression among Korean adults as well as other citizens including American, French, Finnish, and the British.
In this study, we hypothesized that insulin resistance aggravates the severity of periodontitis. We investigated the associations between type 2 diabetes, insulin resistance, and severe periodontitis. The associations between severe periodontitis and insulin resistance in non-obese adults with normal body mass index (BMI) or waist circumference (WC) were also evaluated.
We found that non-abdominal obese adults with insulin resistance were more likely to have severe periodontitis compared to metabolically healthy adults with normal waist circumference. Insulin resistance without abdominal obesity can be considered an independent risk factor of severe periodontitis.
Dr. Jolanta Weaver[/caption]
Jolanta U Weaver, FRCP MRCS PhD CTLHE
Senior Lecturer in Diabetes Medicine
Honorary Consultant Diabetologist
Newcastle
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Vascular stem cells, which are associated with an improvement of heart disease, are improved in type 1 diabetes by repurposing metformin, known to reduce heart disease in type 2 diabetes.
We treated patients with type 1 diabetes with metformin for 8 weeks. The metformin dose varied between 500 mg a day to 2000 mg a day, depending on what patients were happy to take. Subjects were requested to keep diabetic control unchanged to study the direct effect of metformin on heart disease. Circulating endothelial progenitor cells (vascular stem cells) count, Hill’s colonies and pro angiogenic cells function (in test tube) improved in comparison to patients, who did not take metformin but remained on standard therapy.
Endothelial cells associated with vascular damage, on the other hand, were reduced following metformin therapy confirming improved vascular health. The glycaemic control remained unchanged (as planned at the onset of the study) to allow us to examine the effect of metformin ALONE on vascular health. Patients did not suffer any serious side effects.
Dr. Evdokia Anagnostou[/caption]
Evdokia Anagnostou MD
Canada Research Chair (Tier II) in Translational Therapeutics in Autism
Senior Clinician Scientist and co-lead of the Autism Research Centre
Holland Bloorview Kids Rehabilitation Hospital
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Researchers from Holland Bloorview Kids Rehabilitation Hospital / University of Toronto (Canada), Ohio State University, University of Pittsburgh, Columbia University, and Vanderbilt University, led a double-blind, placebo-controlled randomized clinical trial to examine whether metformin, a common type-2 diabetes drug, may be effective in counteracting weight gain commonly seen with the use of atypical antipsychotic medications, indicated by the FDA for the treatment of irritability in children and youth with autism spectrum disorder (ASD).
Results showed that metformin was effective in helping overweight children and adolescents with autism spectrum disorder (ASD) who take antipsychotic medications lower their body mass index (BMI).
Both FDA-approved antipsychotic medications for treating irritability and agitation symptoms in children and adolescents with ASD can cause a significant increase in weight gain, which in addition to increasing BMI, enhances long-term risk of diabetes. This complicates an already challenging issue as adolescents with autism spectrum disorder are ~ two times more likely to be obese than adolescents without developmental disabilities. Findings of this research are important, especially for families of children with ASD, as managing long-term physical health while also treating irritability/agitation symptoms, can help ensure that their child can participate fully in life (school, etc.).
Dr. Jaime Uribarri[/caption]
Jaime Uribarri, MD
Professor, Nephrology
Icahn School of Medicine
Mt. Sinai Medical Center
MedicalResearch.com: What is the background for this study?
Response: We have been doing research in the area of dietary advanced glycation end-products (AGEs) for many years.
AGEs are chemical compounds that form normally in the body in small amounts and also in food when cooking under high heat and dry conditions; a percent of AGEs in food is absorbed and part of it is retained in the body leading to increased smoldering inflammation and oxidative stress that eventually produce most of modern chronic diseases such as diabetes, cardiovascular disease, dementia, etc. We have previously demonstrated that a diet low in AGEs, which essentially means changing the cooking methods to include less application of heat, plenty of water,etc, decreases inflammation of oxidative stress in people with diabetes, chronic kidney disease and in healthy subjects. In the current study we applied the same low dietary AGE intervention to a group of obese patients with the so-called Metabolic syndrome, a risk factor for Diabetes Mellitus.
Dr. Gang Hu[/caption]
Dr. Gang Hu, Associate Professor
LSU’s Pennington Biomedical Research Center & Director
Chronic Disease Epidemiology Lab
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Some studies have found that maternal gestational diabetes mellitus (GDM) places offspring at increased risk of long-term adverse outcomes, including obesity. However, most of studies are from high income countries, with limited data from low to middle income countries. The present study, conducted at urban and suburban sites in 12 countries, found that the increased risk for children of GDM mothers compared with non-gestational diabetes mellitus mothers was 53% for obesity, 73% for central obesity, and 42% for high body fat.
Dr. Ian de Boer[/caption]
Ian de Boer, MD, MS
Associate Professor of Medicine
Adjunct Associate Professor of Epidemiology
Division of Nephrology and Kidney Research Institute
University of Washington, Seattle, WA
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: From the perspective of patients with diabetes, kidney disease can be a devastating complication, leading to end stage renal disease requiring dialysis or kidney transplantation and markedly increasing the risks heart disease, stroke, peripheral vascular disease, and amputation. From a public health perspective, diabetes is the most common cause of end stage renal disease in the US, so understanding, preventing, and treating diabetic kidney disease is critical to reduce the numbers of people needing dialysis and kidney transplants. There have been major changes in the treatment of patients with diabetes over the last 30 years, so we were interested in evaluating how diabetic kidney disease was changing in this context.
We observed that the clinical manifestations of kidney disease have indeed changed among US adults with diabetes over the last 30 years. Albuminuria, or elevated levels of albumin in the urine, has traditionally been thought of as the first evidence of kidney damage for people with diabetes. Reduced GFR, or a reduced ability of the kidneys to filter out waster products, has typically been thought of as a late stage of diabetic kidney disease. But from 1988 to 2014, we saw a significant decrease in the prevalence of albuminuria accompanied by a significant increase in reduced GFR.
Dr. Valerie Holmes[/caption]
Dr Valerie Holmes
Senior Lecturer
Centre for Public Health
School of Medicine, Dentistry and Biomedical Science
Queen's University Belfast
Belfast
MedicalResearch.com: What is the background for this study?
Response: Women with diabetes, type 1 diabetes and type 2 diabetes, are advised to plan for pregnancy as there are higher risks of complications for both the mother and baby when compared to the general maternity population. Careful planning in partnership with diabetes care teams, especially in relation to achieving optimum blood glucose control and taking folic acid can significantly reduce the risks. However, while most women know that they should plan for pregnancy, they are unaware as to why this is important or how to engage with the process, and thus the majority of women (up to two thirds of women) enter pregnancy unprepared. This study describes the implementation of a regional preconception counsellng resource, in the format of a DVD, into routine care in Northern Ireland to raise awareness of pregnancy planning. The authors assessed if the introduction of this resource improved pregnancy planning among women with diabetes in the region.
Dr. Patrick Griffin[/caption]
Patrick Griffin, PhD
Professor
Department of Molecular Therapeutics
The Scripps Research Institute Florida Campus
MedicalResearch.com: What is the background for this study?
Response: Over the past decade, our laboratory and that of TSRI Associate Professor Theodore Kamenecka, have focused on molecules that increase sensitivity to insulin. Using newly discovered information, we have made significant advances in developing a family of drug candidates that target a receptor known as peroxisome proliferator-activated receptors gamma (PPARγ), a key regulator of stem cells controlling bone formation and bone resorption and a master regulator of fat.
Prof. Peter Nordstrom[/caption]
Prof. Peter Nordström PhD
Department of Community Medicine and Rehabilitation
Geriatrics, Umeå University
Umeå, Sweden
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Numerous studies has shown an association between BMI, CVD and death. However, it is not known to what extent genetic factors influence this relationship. We used over 4000 monozygous twin pairs that had different BMI. This mean that the difference in BMI must be due to environmental factors since the genetic setup is similar in monozygous twins.
Since the fatter twin did not have a higher risk of myocardial infarction (MI) or death, environmental factors that increase BMI is very unlikely to increase the risk of myocardial infarction or death. By inference the strong association between BMI, MI and death must be explained by the fact that the same genes control both obesity, MI and death. By contrast, the fatter twin had a higher risk of diabetes.
Brian McKinstry MD
Professor of primary care e-health and General practitioner
MacKenzie Medical Centre
Edinburgh
MedicalResearch.com: What is the background for this study?
Response: The prevalence of diabetes is rising as the population ages and becomes more obese. Clinical services are increasingly stretched, so much so that it will be difficult for doctors and nurses to continue to look after patients using the same service delivery they have used in the past. Increasingly patients are being asked to self-manage long-term illnesses, but particularly with type 2 diabetes they find this stressful. One solution is to encourage self-management but with monitoring at a distance through telehealth.
We performed a randomised controlled trial in family practices in four regions of the United Kingdom among 321 people with type 2 diabetes and glycated haemoglobin (HbA1c) ( a measure of control over the previous three months) >58 mmol/mol. The supported telemonitoring intervention involved self-measurement and transmission to a secure website of twice weekly morning and evening glucose for review by family practice clinicians. The control group received usual care, with at least annual review and more frequent reviews for people with poor glycaemic or blood pressure control in the context of incentives in family practice based on a sliding scale of financial rewards for achieving glycaemic and blood pressure control targets. HbA1c assessed at nine months was the primary outcome. Intention-to-treat analyses were performed.
Dr. Andersen[/caption]
Stig Ejdrup Andersen MD, PhD
Clinical Pharmacology Unit
Zealand University Hospital
Roskilde Denmark
MedicalResearch.com: What is the background for this study?
Response: For decades, we have used sulphonylurea derivates in the medical treatment of type 2 diabetes. Although several newer drugs have become available, adding an SU is still a recommended and acceptable strategy when metformin monotherapy fails. The SUs are among the cheapest glucose lowering drugs on the marked but the risk of hypoglycaemia make clinicians prefer a newer oral drug such as a DPP-IV inhibitor or a SGLT-2 inhibitor to ansulphonylurea because even mild hypoglycaemia may affect the patients’ quality of life negatively.
Several meta-analyses have examined the effectiveness and safety of noninsulin antidiabetic drug, all of which have considered the SUs a homogenous drug class. Pharmacologically, however, the SU agents are quite different. In 2004, a randomized controlled trial by Shernthaner et al. indicated that in comparison with glimepiride, gliclazide MR is equally effective and is associated with fewer hypoglycaemic episodes. Still, head-to-head comparisons of the SU-agents as add-on to metformin are few. In the absence of robust designed comparative trials, we decided to compare the relative risk of hypoglycaemia among the newer SU-agents in a network meta-analysis.
Dr. Andy Menke[/caption]
Andy Menke PhD
Social & Scientific Systems, Inc.
Silver Spring, MD, 20910
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Limited information was available on the prevalence of diabetes among adolescents in the US, particularly the percentage that are undiagnosed and unaware of the condition. We found that 0.8% of adolescents 12-19 years of age had diabetes and 18% had prediabetes. Of those with diabetes, 29% overall were unaware of it and this increased to 40% among Hispanic adolescents and 50% among non-Hispanic black adolescents.
Dr. Fumiaki Imamura[/caption]
Dr. Fumiaki Imamura Ph.D.
MRC Epidemiology Unit
University of Cambridge
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: There was insufficient evidence for effects of polyunsaturated fatty acids (PUFA) intake or blood biomarkers on the development of type 2 diabetes. For instance, previous studies using PUFA biomarkers had a maximum of only 673 type 2 diabetes cases. In the EPIC-InterAct Study - a large European collaborative, prospective study where 12,132 diabetes cases were ascertained during its follow-up - we found diverse associations of blood levels of different types of PUFAs with incidence of type 2 diabetes.
Despite this diversity, clinically relevant results were observed for major polyunsaturated fatty acids. Higher blood levels of total omega-6 PUFAs and the major omega-6 PUFA (linolenic acid) were associated with a lower risk of developing type 2 diabetes. Likewise, levels of alpha linolenic acid, known as a plant-origin omega-3 PUFA, were associated with lower type 2 diabetes risk. Marine-origin omega-3 PUFAs, including docosahexaenoic acid (DHA), showed inconsistent associations with type 2 diabetes risk.
Dr. Suetonia Palmer[/caption]
MedicalResearch.com Interview with:
Principal investigator A/Prof Suetonia Palmer PhD
University of Otago, New Zealand
[caption id="attachment_26202" align="alignleft" width="142"]
Dr. Giovanni Strippoli[/caption]
Senior investigator
Prof. Giovanni Strippoli
MD, PhD, MPH, MM
University of Sydney, Australia and Diaverum, Sweden
MedicalResearch.com: What is the background for this study?
Response: Network meta-analysis is a new technique that allows us to evaluate ALL medical therapies for a specific clinical problem. We wondered whether any of the usual drugs used to treat glucose levels in people with diabetes were safest or most effective.