In type 2 diabetes, randomisation to advice to follow a low-carbohydrate diet transiently improves glycaemic control compared with advice to follow a low-fat diet producing a similar weight loss

Aims/hypothesis  

The study aimed to compare the effects of a 2 year intervention with a low-fat diet (LFD) or a low-carbohydrate diet (LCD), based on four group meetings to achieve compliance.     

Comparison of acarbose and metformin in patients with Type 2 diabetes mellitus insufficiently controlled with diet and sulphonylureas: a randomized, placebo-controlled study.

AIMS: To compare the efficacy and safety of acarbose and metformin when added to sulphonylurea therapy in diabetic patients insufficiently controlled with sulphonylureas alone. METHODS: A 12-week, single-centre, placebo-controlled study, with 89 patients randomized to receive acarbose (100 mg t.d.s.), metformin (850 mg b.d.) or placebo in addition to their sulphonylurea therapy. The study was double-blinded with respect to acarbose/placebo and single-blinded for metformin/ acarbose and metformin/placebo. Patients started a strict dietary regimen 1 week before receiving their first dose of acarbose, metformin or placebo. This regimen was individually adjusted to metabolic status and energy requirements. RESULTS: The primary endpoint, HbA1c, decreased from baseline in all three groups after 12 weeks. The decrease was greater in the two groups receiving active therapy compared with placebo (acarbose -2.3+/-0.32%; metformin -2.5+/-0.16%; placebo -1.3+/-0.34%). There was no significant difference between acarbose and metformin (P=0.65). Differences between both active therapies and placebo were statistically significant (acarbose P < or = 0.01; metformin P < or = 0.004). Reductions in body weight over the treatment period were seen in all three groups and were greatest in the acarbose group (median weight reduction: acarbose 3.5 kg; metformin, 1.0 kg; placebo 1.4 kg). There were no significant differences in the incidence of gastrointestinal side-effects between the three groups and all regimens were generally well tolerated. CONCLUSION: The results of the study demonstrate the equivalence of acarbose and metformin for improving metabolic control in patients insufficiently controlled with diet and sulphonylureas.     

Application of nutrigenomic concepts to Type 2 diabetes mellitus

The genetic makeup that individuals inherit from their ancestors is responsible for variation in responses to food and susceptibility to chronic diseases such as Type 2 diabetes mellitus (T2DM). Common variations in gene sequences, such as single nucleotide polymorphisms, produce differences in complex traits such as height or weight potential, food metabolism, food-gene interactions, and disease susceptibilities. Nutritional genomics, or nutrigenomics, is the study of how foods affect the expression of genetic information in an individual and how an individual's genetic makeup affects the metabolism and response to nutrients and other bioactive components in food. Since both diet and genes alter one's health and susceptibility to disease, identifying genes that are regulated by diet and that cause or contribute to chronic diseases could result in the development of diagnostic tools, individualized intervention, and eventually strategies for maintaining health. Translating this research through clinical studies promises contributions to the development of personalized medicine that includes nutritional as well as drug interventions. Reviewed here are the key nutrigenomic concepts that help explain aspects of the development and complexity of T2DM.     

Adherence to a Mediterranean diet and glycaemic control in Type 2 diabetes mellitus

Aims Mediterranean‐type diets reduce the risk of Type 2 diabetes. Whether a Mediterranean‐type diet improves glycaemic control in diabetes remains unknown. Methods We conducted a cross‐sectional analysis in 901 outpatients with Type 2 diabetes attending diabetes clinics located in Campania County, South Italy. We explored the relation between glycated haemoglobin (HbA_1c), measured centrally, self‐measured pre‐ and postprandial glucose levels and consumption of a Mediterranean‐type diet. Adherence to a Mediterranean‐type diet was assessed by a 9‐point scale that incorporated the salient characteristics of this diet (range of scores, 0–9, with higher scores indicating greater adherence). The study was conducted from 2001 to 2007. Results Diabetic patients with the highest scores (6–9) had lower body mass index and waist circumferences, a lower prevalence of the metabolic syndrome and lower HbA_1c and post‐meal glucose levels than diabetic patients with the lowest scores (0–3). In multivariate analysis, mean HbA_1c and 2‐h post‐meal glucose concentrations were significantly lower in diabetic patients with high adherence to a Mediterranean‐type diet than those with low adherence [difference: HbA_1c 0.9%, 95% confidence intervals (CI) 0.5–1.2%, P < 0.001; 2‐h glucose 2.2 mmol/l, 95% CI 0.8–2.9 mmol/l, P < 0.001]. Conclusions In Type 2 diabetes, greater adherence to a Mediterranean‐type diet is associated with lower HbA_1c and postprandial glucose levels.     

Cancrum oris in a Caucasian male with Type 2 diabetes mellitus.

We describe a patient with Type 2 diabetes mellitus who developed cancrum oris requiring extensive oro-facial reconstructive surgery. There are no previous published reports of cancrum oris occurring in a Caucasian subject with no risk factors other than Type 2 diabetes.     

艾塞那肽改善肥胖2型糖尿病患者生存质量的研究

目的探讨艾塞那肽注射治疗对肥胖T2DM患者生存质量的影响。方法纳入22例肥胖T2DM患者,采用36项简式健康调查和世界卫生组织生存质量测定简表评估患者基线和艾塞那肽注射治疗26周后的生存质量。结果2例患者退出试验。与基线比较,治疗26周后,体重、WC、FPG、HbA₁c均降低(P<0.05或P<0.01),躯体功能、情绪健康问题导致的角色限制、躯体健康领域(PHYS)、心理领域、社会关系领域和环境领域评分均升高(P<0.05或P<0.01)。Pearson相关分析显示,HbA₁c与PHYS呈负相关(r=-0.735,P=0.006)。结论艾塞那肽注射治疗能降低肥胖T2DM患者血糖和体重,并改善总体生存质量。     

Perinatal mortality in Type 2 diabetes mellitus.

AIMS: In many parts of the world the number of pregnancies in women with Type 2 diabetes mellitus (DM) now exceeds that in women with Type 1 DM, but there are few data published on perinatal mortality in Type 2 DM. This study reports observational data on perinatal mortality in Type 2 DM from a population with a high background rate of this disorder. METHODS: Over a 12-year period (1985-1997) at the Diabetes Clinic at National Women's Hospital, Auckland, there were 434 pregnancies in women with Type 2 DM (256 known and 178 diagnosed with gestational diabetes mellitus (GDM), but confirmed to have Type 2 DM early post-partum), 160 pregnancies in women with Type 1 DM and 932 in women with GDM. Perinatal mortality was classified as either intermediate fetal death (20-28 weeks' gestation), late fetal death (28 weeks' gestation to term) or early neonatal death (up to 1 month post-partum). RESULTS: The perinatal mortality in Type 2DM was 46.1/1,000, significantly higher than the rates for the general population (12.5), Type 1 DM (12.5) and GDM (8.9) (P < 0.0001). Congenital malformations accounted for only 10% of the perinatal mortality. There was a seven-fold increase in the rate of late fetal death and 2.5-fold increase in the rates of intermediate fetal and late neonatal death. Subjects with Type 2 DM were significantly older and more obese than subjects with Type 1 DM, and presented later to the diabetes service. CONCLUSIONS: Perinatal mortality in Type 2 DM is significantly increased, mainly owing to an excess of late fetal death. Maternal factors such as obesity may be important contributors to the high perinatal mortality. Women diagnosed with GDM who have unrecognized Type 2 DM are also at high risk, but perinatal mortality is low in women with milder degrees of glucose intolerance in pregnancy.     

Effects and feasibility of a prehabilitation programme incorporating a low-carbohydrate,high-fat dietary approach in patients with type 2 diabetes: A retrospective study

Background and AimsWe performed a retrospective study of diabetic patients undergoing a targeted multimodal prehabilitation programme to assess changes in their diabetic control and functional capacity prior to surgery. As part of the programme, patients were encouraged to follow a low-carbohydrate, high-fat (LCHF) dietary approach. We aimed to assess the feasibility and effects of this programme on our cohort of patients.MethodsFrom 79 patients attending prehabilitation, 17 (13 males, age (median [interquartile range]): 71 [63–79] years) had Type 2 diabetes and none had Type 1. Patients had undergone a targeted multimodal prehabilitation programme prior to surgery, which comprised supervised exercise sessions (aerobic or resistance training), nutritional education (LCHF suggestion, correct protein intake, and avoidance of processed food), psychological support and medical optimization. Weight, body mass index (BMI), glycosylated haemoglobin (HbA1c), fasting glucose, and functional capacity were measured prior to and after prehabilitation. Data were compared with a Wilcoxon signed-rank test.ResultsThere were significant improvements in HbA1c (P = 0.000), fasting glucose (P = 0.006), weight (P = 0.002), and BMI (P = 0.002). There were no significant improvements in functional capacity.ConclusionsWe have shown that in the preoperative period, a targeted multimodal prehabilitation programme incorporating a LCHF diet improves diabetes control in patients with T2D awaiting elective surgery. Our approach is novel as a LCHF diet has not previously been utilized in patients with diabetes within this context. Prospective studies are required in the context of post-operative outcomes.     

Effect of protein intake on glycaemic control and renal function in Type 2 (non-insulin-dependent) diabetes mellitus

Summary Recent clinical investigations have suggested that dietary protein intake may modulate the progression of diabetic nephropathy and influence glycaemic control in Type 2 (non-insulin-dependent) diabetes mellitus. Twelve normotensive Type 2 diabetic patients with microalbuminuria took part in a randomized cross-over trial of a 3-week high protein diet (2.0 g/kg desirable weight per day) and a 3-week moderate protein diet (0.8 g/kg desirable weight per day) to test the simultaneous effect of protein intake modulation on glycaemic control and renal function. Both diets were isoenergetic and the moderate protein diet was supplemented with calcium and phosphate. Renal function and glycaemic control were evaluated at the beginning and at the end of each diet. The moderate protein diet reduced the urinary albumin excretion rate, glomerular filtration rate, creatinine clearance, and proteinuria without adversely affecting glycaemic control; fasting glycaemia and the ratio of fructosamine to proteins were significantly reduced. The high protein diet induced similar improvements in glycaemic control but small changes in renal function.     

Rapid gastric emptying of a liquid meal in long-term Type 2 diabetes mellitus

Both delayed and accelerated gastric emptying rate (GER) have been reported in patients with diabetes mellitus. Delayed GER has been attributed to autonomic neuropathy in established diabetes but rapid GER was demonstrated in early Type 2 diabetes. The aim of the study was to investigate rapid gastric emptying in a group of people with long-duration Type 2 diabetes. GER of a radiolabelled liquid meal was studied scintigraphically in 20 Type 2 patients with a mean (± SEM) duration of diabetes 13 (±1) years. The 50 % emptying time (t₅₀) for the liquid meal was shorter in diabetic patients (29.6 ± 2.1 min) than in controls (39.2 ± 1.9 min; p<0.0005). Accelerated emptying (t₅₀ value below the shortest t₅₀ of controls) was evidenced in 14/ 20 patients and delayed emptying (t₅₀ value exceeding the upper t₅₀ of controls) in none. Patients with accelerated GER were comparable for BMI, diabetes duration, HbA_1c and fasting glycaemia to those with normal GER. Rapid GER for liquids was found in the presence or absence of autonomic neuropathy. Seven of the patients with rapid emptying of the liquid meal were reassessed using a solid meal. Only one patient demonstrated rapid emptying of the solid meal, which was normal in 3 and delayed in 3 patients. In conclusion, accelerated GER can be found in long-term Type 2 diabetes but there is no concordance between GER of a liquid and a solid meal. Copyright © 1998 John Wiley & Sons, Ltd.     

Gastrointestinal symptoms in Chinese patients with Type 2 diabetes mellitus.

AIMS: To examine and compare gastrointestinal (GI) symptoms in Hong Kong Chinese Type 2 diabetic outpatients and non-diabetic control subjects. METHODS: A total of 149 Chinese Type 2 diabetic patients (66 men and 83 women, age (mean +/- SD) 46.8+/-11.1 years) newly referred to the diabetes clinic of the Prince of Wales Hospital, Hong Kong were examined. Sixty-five age and sex-matched non-diabetic subjects were recruited from the community as controls (22 men and 43 women, age (mean +/- SD) 46.5+/-6.6 years, P = 0.820). All patients were interviewed regarding GI symptoms over the past year, using a questionnaire that covered 14 items. A scoring system from 0 to 4 was used to grade severity. RESULTS: Diabetic patients had higher blood pressure, fasting plasma glucose and glycated haemoglobin and were more often smokers than control subjects. Of the 149 diabetic subjects, 105 (70.5+/-45.8%) had GI symptoms while only 20 (30.8%) of the 65 control subjects had GI symptoms (P<0.001). The respective percentages of upper and lower GI symptoms in diabetic and normal subjects were 44.3% vs. 24.6% (P = 0.006) and 54.4% vs. 13.9% (P<0.001). The three commonest GI symptoms in diabetic patients were diarrhoea (34.9%), constipation (27.5%) and epigastric fullness (16.8%). After adjustment for age, sex, duration of diagnosed diabetes and smoking, patients with or without metformin had similar percentages or scores for GI symptoms. On multivariate analysis using age, body mass index, fasting plasma glucose, glycated haemoglobin, duration of diagnosed diabetes and presence of peripheral neuropathy as independent variables, duration of diabetes was the only independent parameter associated with total score for GI symptoms (beta = 0.116, P = 0.003), for upper GI symptoms (beta = 0.073, P = 0.005) and for lower GI symptom (beta = 0.043, P = 0.020). CONCLUSIONS: Up to 70% of the Chinese Type 2 diabetic outpatients have GI symptoms, which is a much higher rate than in non-diabetic control subjects. Duration of diabetes is the most important factor associated with the presence of such GI symptoms.     

A low carbohydrate Mediterranean diet improves cardiovascular risk factors and diabetes control among overweight patients with type 2 diabetes mellitus: a 1‐year prospective randomized intervention study

Background: The appropriate dietary intervention for overweight persons with type 2 diabetes mellitus (DM2) is unclear. Trials comparing the effectiveness of diets are frequently limited by short follow‐up times and high dropout rates. Aim: The effects of a low carbohydrate Mediterranean (LCM), a traditional Mediterranean (TM), and the 2003 American Diabetic Association (ADA) diet were compared, on health parameters during a 12‐month period. Methods: In this 12‐month trial, 259 overweight diabetic patients (mean age 55 years, mean body mass index 31.4 kg/m²) were randomly assigned to one of the three diets. The primary end‐points were reduction of fasting plasma glucose, HbA1c and triglyceride (TG) levels. Results: 194 patients out of 259 (74.9%) completed follow‐up. After 12 months, the mean weight loss for all patients was 8.3 kg: 7.7 kg for ADA, 7.4 kg for TM and 10.1 kg for LCM diets. The reduction in HbA1c was significantly greater in the LCM diet than in the ADA diet (?2.0 and ?1.6%, respectively, p < 0.022). HDL cholesterol increased (0.1 mmol/l ± 0.02) only on the LCM (p < 0.002). The reduction in serum TG was greater in the LCM (?1.3 mmol/l) and TM (?1.5 mmol/l) than in the ADA (?0.7 mmol/l), p = 0.001. Conclusions: An intensive 12‐month dietary intervention in a community‐based setting was effective in improving most modifiable cardiovascular risk factors in all the dietary groups. Only the LCM improved HDL levels and was superior to both the ADA and TM in improving glycaemic control.     

老年2型糖尿病高尿酸血症相关因素分析

目的探讨老年2型糖尿病高尿酸血症的相关因素。方法将2013-01~2016-01该院住院治疗的240例60岁以上2型糖尿病老年患者,按血尿酸水平分为高尿酸(HUA)组(A组)45例,非高尿酸(NUA)组(B组)195例,分析两组体重指数(BMI)、血压、空腹血糖(FPG)、糖化血红蛋白(Hb A1c)、尿素氮(BUN)、血肌酐(Scr)、总胆固醇(TC)、甘油三酯(TG)、高密度脂蛋白(HDL-C)、低密度脂蛋白(LDL-C)水平差异。结果老年2型糖尿病高尿酸血症患病率18.7%。高尿酸血症与TG、TC、BMI、血压密切相关。结论应控制体重,降低TG,积极预防老年2型糖尿病高尿酸血症。     

Socioeconomic factors related to attendance at a Type 2 diabetes screening programme

Aims The prevalence of diabetes is increasing, and screening of high‐risk populations is recommended. A low attendance rate has been observed in many Type 2 diabetes screening programmes, so that an analysis of factors related to attendance is therefore relevant. This paper analyses the association between socioeconomic factors and attendance for Type 2 diabetes screening. Methods Persons aged 40–69 years (n = 4603) were invited to participate in a stepwise diabetes screening programme performed in general practitioners’ offices in the county of Aarhus, Denmark in 2001. The study was population‐based and cross‐sectional with follow‐up. The association between screening attendance in the high‐risk population and socioeconomic factors was analysed by odds ratio. Results Forty‐four percent of the estimated high‐risk population attended the screening programme. In those with known risk for Type 2 diabetes, attenders were more likely to be older, to be unemployed and to live in the countryside than non‐attenders. The risk for Type 2 diabetes was unknown for 21% of the study population; this group was younger and less likely to be cohabitant, skilled, or employed and to have middle or high income than the study population with known risk score for diabetes. Conclusions A low attendance rate was found in this screening programme for Type 2 diabetes. No substantial socioeconomic difference was found between attenders and non‐attenders in the high‐risk population. Further research is needed to uncover barriers to screening of Type 2 diabetes in socioeconomically deprived persons.     

Type 2 diabetes-associated genetic variants discovered in the recent genome-wide association studies are related to gestational diabetes mellitus in the Korean population

Aims/hypothesis  New genetic variants associated with susceptibility to type 2 diabetes mellitus have been discovered in recent genome-wide association (GWA) studies. The aim of the present study was to examine the association between these diabetogenic variants and gestational diabetes mellitus (GDM). Methods  The study included 869 Korean women with GDM and 345 female and 287 male Korean non-diabetic controls. We genotyped the single nucleotide polymorphisms (SNPs) rs7756992 and rs7754840 in CDKAL1; rs564398, rs1333040, rs10757278 and rs10811661 in the CDKN2A−CDKN2B region; rs8050136 in FTO; rs1111875, rs5015480 and rs7923837 in HHEX; rs4402960 in IGF2BP2; and rs13266634 in SLC30A8. In addition, rs7903146 and rs12255372 in TCF7L2; rs5215 and rs5219 in KCNJ11; and rs3856806 and rs1801282 in PPARG were genotyped. The genotype frequencies in the GDM patients were compared with those in the non-diabetic controls. Results  Compared with controls (men and women combined), GDM was associated with rs7756992 and rs7754840 (OR 1.55, 95% CI 1.34–1.79, p = 4.17 × 10⁻⁹) in CDKAL1; rs10811661 (OR 1.49, 95% CI 1.29–1.72, p = 1.05 × 10⁻⁷) in the CDKN2A−CDKN2B region; rs1111875 (OR 1.27, 95% CI 1.09–1.49, p = 0.003), rs5015480, and rs7923837 in HHEX; rs4402960 (OR 1.18, 95% CI 1.01–1.38, p = 0.03) in IGF2BP2; rs13266634 (OR 1.24, 95% CI 1.07–1.43, p = 0.005) in SLC30A8; and rs7903146 (OR 1.58, 95% CI 1.03–2.43, p = 0.038) in TCF7L2. The risk alleles of the SNPs rs7756992 and rs7754840 in CDKAL1; rs10811661 in the CDKN2A–CDKN2B region; and rs1111875, rs5015480 and rs7923837 in HHEX were associated with significant decreases in the insulin AUC during a 100 g OGTT performed at the time of diagnosis of GDM. Conclusions/interpretation  Some of the type 2 diabetes-associated genetic variants that were discovered in the recent GWA studies are also associated with GDM in Koreans. Electronic supplementary material  The online version of this article (doi:) contains supplementary material, which is available to authorised users. Y. M. Cho and T. H. Kim contributed equally to this study.     

老年糖尿病无症状性脑梗死38例临床分析

目的探讨老年糖尿病患者合并无症状性脑梗死的临床特点及危险因素。方法2000-01～2004-10将广东省茂名市人民医院门诊及住院老年糖尿病并无症状性脑梗死38例为观察组,非糖尿病并无症状性脑梗死36例为对照组,比较两组头颅CT特点及血胆固醇、甘油三酯、体重指数、高密度脂蛋白、纤维蛋白原等指标。结果老年糖尿病组多灶性脑梗死与非糖尿病组之间的差异具有显著性,血胆固醇、高密度脂蛋白、纤维蛋白原、体重指数的差异亦有显著性。结论老年糖尿病并无症状性脑梗死以多灶性脑梗死多见,老年糖尿病合并高甘油三酯、高胆固醇、高密度脂蛋白降低、肥胖的患者易致无症状性脑梗死。     

Heel bone strength is related to lifestyle factors in Okinawan men with type 2 diabetes mellitus

Aims/Introduction

Although male diabetic patients have an increased risk of fracture, there is little information about this in the literature. The association between heel bone stiffness and the lifestyle of male patients with diabetes was evaluated.

Materials and Methods

The study included 108 participants with type 2 diabetes mellitus patients and 168 age-adjusted, healthy male volunteers. None of the participants had a history of osteoporosis or other severe diseases. Heel bone stiffness was examined by quantitative ultrasound, and each participant completed a health interview survey questionnaire. Bone stiffness was taken as an indicator of bone strength. Stepwise regression analysis was used to investigate associations between bone stiffness and lifestyle-related factors, such as sunlight exposure, intake of milk or small fish, regular exercise, cigarette smoking, consumption of alcohol, and number of remaining teeth.

Results

Bone stiffness showed a significant negative association with cigarette smoking [standardized coefficient (SC) = −0.297, F-value (F) = 10.059] and age (SC = −0.207, F = 7.565) in diabetic patients. Bone stiffness showed a significant negative association with age (SC = −0.371, F = 12.076) and height (SC = −0.193, F = 7.898), as well as a significant positive association with sunlight exposure (SC = 0.182, F = 9.589) and intake of small fish (SC = 0.170, F = 7.393) in controls.

Conclusions

These findings suggest that cigarette smoking and age are negatively associated with bone stiffness in Okinawan male patients with type 2 diabetes mellitus.     

Impacts of self-management education on glycaemic control in patients with type 2 diabetes mellitus

Objectives

Dietary and physical activity advice have been considered to be seminal ingredients in prevention and management of type 2 diabetes mellitus. In this regard, the impacts of a three-month self-management intervention on glycemic control in patients with type 2 diabetes were examined in the present study.

Anaemia in patients with type 2 diabetes mellitus without nephropathy is related to iron deficiency

Background and aimsIron deficiency anaemia, although well reported in diabetic nephropathy, has not been well studied in type 2 diabetes patients in the absence of nephropathy. We studied the prevalence of anaemia and iron deficiency in type 2 diabetes patients without nephropathy.Material and methodsA total of 89 patients were selected for this study. 24 h urine protein less than 500 mg was used as the criteria to rule out diabetic nephropathy. Complete hemogram, iron profile and high sensitivity C reactive protein (hs CRP) levels were performed in each patient.Functional iron deficiency (FID) was defined as serum ferritin more than 100 μg/l with serum transferrin less than 20% and total iron deficiency state was defined as serum ferritin less than 100 μg/l.ResultsFifteen patients (16.8%)had anaemia out of which 13 had total iron deficiency and one each had functional iron deficiency and normal iron status respectively. Assessment of the iron status overall showed that 49 patients had TID (55.05%), 16 had FID (17.9%)and 24 (27.05%) had normal iron status. The hs-CRP was significantly higher in those with iron deficiency.ConclusionsThe present study found a high prevalence of iron deficiency anaemia in type 2 diabetic patients even in the absence of nephropathy. Most of the diabetic subjects also displayed an iron deficiency state the cause of which needs further investigation.