Metabolic Syndrome and its Correlates among Hypertensive Patients in Abuja, North Central Nigeria

BACKGROUND

Metabolic syndrome is a constellation of abnormalities which includes central obesity, dyslipidaemia, elevated blood pressure and hyperglycemia. Hypertension, (which is a very common component of metabolic syndrome), and diabetes mellitus, are independently associated. Also, studies examining metabolic syndrome inAbuja, a city with affluence-driven lifestyle, are not available. This study aimed to investigate the prevalence of metabolic syndrome among hypertensive patients in Abuja, Nigeria, as well as to examine the associations between metabolic syndrome and certain factors in that cohort of hypertensive patients.

METHODS

This was a retrospective study that used data from hypertensive patients who attended clinic over a period of five years. Eight hundred and fifty-eight, (858-combined), case files of pre-treated, (previously known hypertensive patients) and newly diagnosed hypertensive participants were used for the study. The student t-tests were used to compare continuous variables, while Chi-square (χ2) tests were used for relationship between qualitative variables. The likelihood ratio test was employed to further confirm the statistical significance of certain independent variables relating with metabolic syndrome. A P-value of < 0.05 was considered statistically significant.

RESULTS

The mean ages were 48.70±12.18, 49.19±11.06 and 48.2±13.3 years for combined group, the pre-treated and the newly-diagnosed groups respectively. The pre-treated, group consists of those previously known hypertensive patients, while the new group consists of those who were newly diagnosed hypertensive patients and were treatment naïve. The prevalence of metabolic syndrome in this study was 45.5% in the combined group, 47.23% in the pre-treated group and 37.3% in the newly diagnosed group. The commonest component of metabolic syndrome was reduced high density lipoprotein cholesterol, HDL-C.

CONCLUSION

Metabolic syndrome is prevalent among hypertensive patients in Abuja, Nigeria. Some correlates of metabolic syndrome include; elevated BMI, truncal obesity, elevated total cholesterol, the use of thiazide diuretics and beta blockers as antihypertensives.

[Screening and prevention of diabetes]

A valid and efficient screening for individual diabetes risk is a highly welcomed tool in primary care and specialist medical practice. It is needed to detect early stages of diabetes risk and prediabetes and to start interventions that have the aim to prevent diabetes and also other chronic diseases from developing. The oral glucose tolerance test is the gold standard, but it is difficult to perform in an evidence-based manner in primary care. Furthermore, measuring fasting and 2-h postprandial glucose values detects only late stages of the pathophysiological development of type 2 diabetes. Interestingly, the 1-h glucose value is highly predictive of future diabetes risk, but is rarely used in primary care. Therefore, risk scores are commonly used to evaluate diabetes risk, but unfortunately, they generally do not mirror the relevance of increased risk due to the person's own lifestyle. Measuring waist circumference is another possibility, because the waist is directly associated with the amount of visceral fat, which again directly correlates with the pathophysiology of diabetes development. A further possibility is the EZSCAN™ technology. The EZSCAN™ is based on reverse iontophoresis, a new technology to detect very early forms of peripheral neuropathies, which are commonly associated with early diabetes risk stages. It is important to perform diabetes screening in a targeted manner, in both medical and paramedical environments, and it is mandatory to add targeted interventions, based on the screening evaluated diabetes risk.

Assessment of small C-fiber status for screening of oxidative stress in patients at risk of diabetes

Oxidized LDL (oxLDL), anti-oxLDL antibody (anti-oxLDL) and paraoxonase (PON1) are increasingly being reported to be associated with diabetic atherosclerosis. Oxidative stress could affect also small C-fibers innervating the sweat glands even in prediabetes. Hence it could be hypothesized that sweat dysfunction may be a predictor of oxidative stress status for early detection of diabetes. Ezscan, a new device, has recently been developed to measure the sweat function. Therefore, this study was aimed to determine the relevance of this Ezscan method to identify impairment in oxidative stress parameters. Plasma levels of oxLDL and anti-oxLDL were measured by enzyme immunoassay and ELISA respectively. Small C-fiber status was assessed by measurement of hand and foot sweat function with the help of Ezscan device and subsequent calculation of a risk score. Out of 82 subjects recruited in this study, 38 had impaired glucose tolerance and 6 had newly diagnosed diabetes mellitus. Ezscan risk score was significantly (p=0.004) correlated with oxLDL/anti-oxLDL ratio (0.32). Area under the curve (AUC) of receiver operating characteristics (ROC) analysis for detection of oxLDL/anti-oxLDL ratio (>0.12) was 0.76. For an Ezscan risk score of 50%, the sensitivity and specificity were 68% and 71% respectively. After adjustment for age and BMI, PON1 activity showed significant difference among the 3 risk groups defined by Ezscan risk score. Based on these results it may be concluded that Ezscan could be a useful screening tool in daily practice to assess alterations in oxidative stress parameters in individuals at risk of developing diabetes.

Assessment of small fiber neuropathy to predict future risk of type 2 diabetes

OBJECTIVE

Sudomotor dysfunction due to small fiber neuropathy can be observed very early in pre-diabetes. The aim of this study was to assess the predictive power of EZSCAN, a non invasive, quick and simple measurement of sudomotor function to identify glucose impairment.

RESEARCH DESIGN AND METHODS

The study was performed in 76 German subjects at risk of diabetes. Glucose metabolism was assessed by using, oral glucose tolerance test (OGTT) at baseline and after 2 year follow-up. Sudomotor function was evaluated by measuring hand and foot electrochemical sweat conductances to calculate a risk score.

RESULTS

At baseline, 38 patients had normal glucose tolerance (NGT), 34 had pre-diabetes (impaired fasting glucose, IFG and/or impaired glucose tolerance, IGT) and 4 had newly diagnosed type 2 diabetes. The AUC values for FPG, 2h-OGTT glucose, 1h-OGTT glucose, HbA1C and EZSCAN score to predict pre-diabetes were 0.50, 0.65, 0.64, 0.72 and 0.76, respectively. Subjects having a moderate or high EZSCAN score (>50) at baseline had a substantially increased risk for having IFG and/or IGT at follow-up visit presented by an odds ratio of 12.0 [1.4-100.5], the OR for having 1h-OGTT ≥ 8.6mmol/L at follow-up was 9.8 [1.0-92.8] and for having HbA1C ≥ 5.7% was 15.7 [1.9-131.5] compared to subjects with low EZSCAN risk.

CONCLUSIONS

This preliminary study, which must be confirmed in a larger population, shows that EZSCAN risk score is associated with diabetes progression which have implications for prevention and disease management.

The European perspective of diabetes prevention: the need for individualization of diabetes prevention

Over the last decade the situation for people with diabetes mellitus in Europe has changed significantly. The number of patients increases continuously, the age of diagnosis decreases and effective management grows to become a burden for European healthcare systems. In this situation numerous stakeholders try to develop concepts for innovative chronic care management as well as individualized and personalized diabetes management. A major focus is set to activities for early screening and prevention of the diabetes and associated diseases. The present article will give an overview about current achievements in European projects addressing the unmet needs in diabetes management and also to introduce undergoing projects in the field of diabetes prevention and care. Furthermore, the SweetSmart concept will be presented, which is the initiation of a strategy to individualize interventions for the prevention of diabetes and care management. In the current discussion about the management of health care resources it is important to have a strategic vision about a realistic future of innovative chronic care management.

Circulating very-low-density lipoprotein from subjects with impaired glucose tolerance accelerates adrenocortical cortisol and aldosterone synthesis

Apart from their role in cardiovascular homeostasis and immunomodulation, aldosterone and cortisol are also implicated in the pathogenesis of insulin resistance and type 2 diabetes mellitus (T2DM). Furthermore, glycoxidative modifications of lipoproteins are increasingly recognized as an etiological factor for increased cardiovascular morbidity and mortality in prediabetic individuals. The causative relationship between in vivo lipoprotein modifications and steroidogenesis in subjects with impaired glucose tolerance (IGT), however, is not well defined. Therefore, we aimed to investigate the impact of in vivo modified lipoproteins on aldosterone and cortisol release from human adrenocortical H295R cells. Following an oral glucose tolerance test, 20 individuals with normal glucose tolerance (NGT) and 20 IGT subjects were randomly selected from the ongoing PRAEDIAS prevention study in our department. Cells were incubated for 24 h with lipoproteins isolated from NGT and IGT individuals and aldosterone and cortisol release was measured in the supernatants. VLDL induced a greater stimulating effect on adrenocortical aldosterone and cortisol release compared to HDL and LDL. Moreover, IGT-VLDL evoked a significantly higher effect (p<0.05) on hormone release than NGT-VLDL. Incubation of cells with in vitro modified lipoproteins and specific pharmacological inhibitors suggests that VLDL presumably recruits ERK1/2 as one of the downstream effectors of Jak-2. In summary, in vivo modified VLDL are able to promote prediabetic hormonal dysregulation by modulating adrenocortical steroidogenesis via Jak-2-ERK dependent pathway.

Assessment of small fiber neuropathy through a quick, simple and non invasive method in a German diabetes outpatient clinic

INTRODUCTION

Sudomotor dysfunction is one of the earliest neurophysiologic abnormalities to manifest in distal small fiber neuropathy. SUDOSCAN® was developed to provide a non invasive, quick, simple and quantitative measurement of sweat function. The aim of this observational study was to assess sweat function in a diabetes outpatient consult clinic in Germany.

METHODS

The study was conducted from February 2009 to March 2011 on patients of a diabetes outpatient clinic in Germany with type 1 and type 2 diabetes, and was conducted parallel to standard care. Sweat function was evaluated by measuring the electrochemical conductance (ESC) of the hands and feet. The method's reproducibility between 2 devices and a follow-up according to insulin administration were also assessed.

RESULTS

52 patients with type 1 diabetes and 115 patients with type 2 diabetes (69 receiving insulin) were involved in this observational study. Hand and foot conductances were lower in patients with type 2 diabetes when compared to patients with type 1 diabetes. A slight decrease in hand and foot conductances was observed in patients with type 2 diabetes without insulin, while an increase was observed in patients receiving insulin (-3.8±9.7 vs. 1.0±9.7 µS, p=0.02 for the hands and -2.2±7.5 vs. 4.1±8.8 µS, p<0.001 for the feet). Coefficient of correlation between measurements performed with the 2 different devices was 0.85 for hands and 0.93 for feet, p<0.001. No safety concern was reported and none of the subjects experienced discomfort during the tests.

CONCLUSION

This preliminary study shows that the assessment of small C fiber neuropathy can be performed non invasively, quickly and effectively in standard diabetes outpatient practice with very good reproducibility. The observation that electrochemical skin conductance improves with intensified insulin treatment must be confirmed in a clinical study performed on a larger population.

Prevention of type 2 diabetes: the strategic approach for implementation

A growing need exists to deliver effective and affordable prevention programs and to take urgent action to address the major public health challenge that diabetes represents. Achieving prevention of type 2 diabetes requires moving through a series of steps from basic science discovery to widespread distribution of effective interventions. Understanding the cellular level influences on diabetes prevention will help target particular interventions to those who may be most responsive. Several randomized controlled trials conducted throughout the world have demonstrated that type 2 diabetes can be prevented or delayed. Subsequent real-world translation studies have provided important information necessary to reduce cost and increase access. Ultimately achieving a population impact in diabetes prevention requires widespread distribution of effective interventions, which is supported by policies that help achieve sustainability and reach. The use of a global stakeholder network can help to share experiences and build on partner knowledge gained.

A more simplified Finnish diabetes risk score for opportunistic screening of undiagnosed type 2 diabetes in a German population with a family history of the metabolic syndrome

The aim of the present study was to evaluate the performance of the Finnish diabetes risk score (FINDRISC) for identifying undiagnosed type 2 diabetes in a German population and to develop a more simplified alternative model. We invited 921 individuals with a family history of the metabolic syndrome in a cross-sectional survey. Of these, 771 subjects completed the FINDRISC questionnaire and underwent an oral glucose tolerance test. The performance of the FINDRISC was assessed using the area under the receiver operating characteristics curve (ROC-AUC). The ROC-AUC of the FINDRISC was 0.81 (0.76-0.87). We detected no difference in diabetes prevalence between individuals with or without a family history of diabetes. Two logistic regression models (continuous- and categorical-model) were developed using the diagnosis of diabetes as the dependent variable, and age, body mass index (BMI), waist circumference, use of blood pressure medication, and history of high blood glucose as independent variables. After stepwise backward elimination of the insignificant variables, the following variables remained: age, BMI, and history of high blood glucose. The ROC-AUCs for the continuous- and categorical-models were 0.88 (0.85-0.92) and 0.86 (0.82-0.90), respectively, and were significantly larger than the ROC-AUC of the FINDRISC. There was no significant difference between the ROC-AUC of fasting plasma glucose and those of the two regression models. The FINDRISC questionnaire can be used to identify undetected diabetes in a German population. The simplified version, the categorical-model, may be a useful alternative for identifying asymptomatic type 2 diabetes.

Tools for predicting the risk of type 2 diabetes in daily practice

The discussion about the diagnosis and treatment of type 2 diabetes - and, more generally, dysglycaemia - should be framed in terms of a continuum of risk. A variety of tools have been developed to identify individuals with an increased risk of developing type 2 diabetes and to quantify the probability of type 2 diabetes either cross-sectionally or prospectively. Such scores are based on traditional risk factors for diabetes, such as age, body mass index (BMI), and family history, while others also evaluate metabolic risk factors such as lipid levels. The performance of a diabetes risk-prediction tool is generally assessed by measuring its accuracy, availability, practicability, and costs. This review discusses the validity and use of today's available major risk-prediction tools for clinical practice, and assesses the scope and cost-effectiveness of available tools. Among these prediction tools, American Diabetes Association (ADA) Risk Tools, Finnish Diabetes Risk Score (FINDRISC), National Health and Nutrition Examination Survey (NHANES) Risk Score, and Study to Prevent Non-Insulin Dependents Diabetes Mellitus (STOP-NIDDM) Risk Score were of our concern. We conclude that the FINDRISC tool is currently the best available tool for use in clinical practice in Caucasian populations, but modifications may be required if applied to other ethnic groups.

Polymorphisms in perilipin gene (PLIN) are not associated with obesity and weight variation in people with high risk of type 2 diabetes

Perilipins are hormonally regulated phosphorylated proteins that coat the intracellular lipid storage droplet . They are essential for the regulation of triglyceride deposition and mobilization . The human perilipin gene (PLIN) is located to 15q26.1, near the susceptibility loci for obesity, and insulin-dependent diabetes mellitus, and hypertriglyceridemia. Therefore, it is considered as a candidate gene for these diseases . Some studies shown that lower level of perilipin protein was displayed in obese than lean subjects and polymorphisms in PLIN were associated with obesity in American and Spanish white women as well as in Korean . But some other studies showed that, this association was not significant in Chinese and French . The aim of the current study was to examine whether the associations manifested in a German population with high risk of type 2 diabetes.

The European perspective of type 2 diabetes prevention: diabetes in Europe--prevention using lifestyle, physical activity and nutritional intervention (DE-PLAN) project

BACKGROUND

The prevalence of type 2 diabetes (T2D) has dramatically increased in Europe, and the age-at-diagnosis has become younger. Action is needed now to develop targeted prevention management program for T2D. The DE-PLAN ("Diabetes in Europe - Prevention using Lifestyle, Physical Activity and Nutritional intervention") project, led by the University of Helsinki is currently addressing this major public health concern in Europe.

METHODS

The DE-PLAN project aims at developing and testing models of efficient identification and intervention of individuals at high risk of type 2 diabetes in the community. It conducts a lifestyle modification intervention in people at high risk for T2D. Furthermore, it tests the feasibility and cost-effectiveness of the translation of the current research evidence about preventive intervention program into clinical settings within existing health care systems in 17 European countries.

RESULTS

This 3-year project spanning has commenced mid-2005. By now, 25 institutions from 17 countries are involved.

CONCLUSION

The development of efficient screening strategies for type 2 diabetes risk as well as the development of core intervention strategies for the primary prevention of type 2 diabetes should significantly enhance the ability of health care professionals to respond swiftly to the drastic increase of T2D and its burden to the society.

Genetic polymorphisms of beta2- and beta3-adrenergic receptor genes associated with characteristics of the metabolic syndrome in black South African women

BACKGROUND

Genetic variation in the beta2 (ADRB2) and beta3 (ADRB3) adrenergic receptor genes are associated with obesity and insulin resistance. To further elucidate the role of these genes in the pathophysiology of obesity the present study investigated associations between certain polymorphisms in ADRB2 and ADRB3 and parameters of carbohydrate and lipid metabolism in a population of African origin.

MATERIAL AND METHODS

Data of 102 black South African women obtained in the POWIRS (Profile of Obese Women with the Insulin Resistance Syndrome) study were used. Endpoint measurements included several anthropometric variables, resting blood pressure, plasma glucose, insulin, free fatty acids (FFA), ghrelin, leptin and lipids, and insulin resistance as estimated by the homeostasis model assessment (HOMA-IR) index. Polymorphisms were analyzed via PCR based methods.

RESULTS

The percentage body fat was significantly lower (p< or =0.05) and the FFA significantly higher (p< or =0.05) in lean subjects (BMI< or =25 kg/m2) with the Glu27 variant allele compared to subjects with the Gln27 wildtype allele of the ADRB2 gene. In contrast, the variant allele of the ADRB2 gene was significantly positive associated (p< or =0.05) with the HOMA-IR-index in overweight black African women (BMI>25 kg/m2). No significant differences in parameters of the metabolic syndrome were apparent between subjects with the wildtype and variant alleles in the ADRB3 gene.

CONCLUSION

The presence of the Glu27 and Arg64 polymorphisms of the ADRB2 and ADRB3 genes are not directly related to indices of the metabolic syndrome.

The European perspective of diabetes prevention

The dramatic increase in newly diagnosed cases of type 2 diabetes is a major public health concern within the European Union. However, it has been demonstrated that prevention programmes can significantly reduce the risk of developing diabetes. There is a clear consensus amongst healthcare professionals that action is urgently needed at both EU and community levels. The challenge is to implement proven intervention methods effectively into clinical reality. To achieve this, action is needed not only in the field of policy development but also in the development of targeted intervention programmes, which address the needs of people with an increased diabetes risk, clinical- and community-based healthcare professionals, and the general population. The Diabetes Prevention Forum (DPF), founded by the European region of the International Diabetes Federation, consists of European diabetes experts from a range of backgrounds. The DPF is taking immediate action to co-ordinate and improve the information flow between all relevant stakeholders to enable more effective communication, so helping to improve the ability to prevent type 2 diabetes in Europe.

The health status of Russian-speaking immigrants in Germany

INTRODUCTION

Germany developed today into a country of immigration, which creates an additional burden for the social security system and results in a new challenge for the healthcare. In the last 17 years more than two million "Russia Germans" have been repatriated and about two hundred thousand Jewish refugees have resettled in Germany from the former Soviet Union. Nevertheless relevant data concerning migration-related public health care are very scare.

METHODS

Search of PubMed and Journals extracts combined with the own researches, analysing the health status indices of the Russian-speaking immigrants in Germany.

RESULTS

Both repatriates of German origin and Jewish refugees demonstrated higher prevalence of impaired lipid metabolism in comparison with native population. 42 % of the 503,040 HBsAg (hepatitis B s-Antigen) carriers in Germany were migrants. The Jewish refugees demonstrated the highest rates of depression and anxiety and the highest levels of awakening cortisol. On the other side German resettlers showed lower cardiovascular as well as all-cause death rates compared to the native Germans.

CONCLUSION

The development of adequate health care programmes to address migratory aspects as well as the establishment of quality standards will realistically enhance the capability of responding rapidly to migrant health aspects and help to tackle inequalities in health.

Insulin resistance -- the role of ethnicity: evidence from Caucasian and African cohorts

The risk for insulin resistance and subsequent type 2 diabetes varies between different ethnic populations due to differences in the genetic and environmental background. However, obesity and unhealthy lifestyle, crucial determinants of insulin resistance, are on the rise throughout all population groups though the susceptibility towards those factors may differ. Up to the present day it is not clear whether insulin resistance is based on metabolic changes due to lifestyle modifications or rather an ethnic and thus genetic grounded phenomenon. Genetic variations in secretion products of the active fat tissue (adipokines), a different pathophysiology of changes in glucose metabolism and the deep impact of urbanization (environmental factors) are discussed as primary determinants for differences in manifestation of insulin resistance between Caucasian and African populations. These factors may be influenced or modified by a central theme: visceral obesity. This mini review will elaborate on these issues illustrated by observations from Caucasian and African cohorts.

The Metabolic Syndrome - a global challenge for prevention

In the last years we have learned a lot about the pathopysiology of a cluster of the diseases called Metabolic Syndrome but currently an exciting discussion debates the Metabolic Syndrome in a light of a mystery of medicine or a clinical paradigm with a controversary about diagnostic, treatment or preventive procedure. There is now convincing evidence that prevention is the most important and effective way to reduce the personal and socio-economic burden of the Metabolic Syndrome and its associated complications. Still, it is currently not clear how to implement preventive interventions into clinical practice but will require an integrated and transdisciplinary approach on an international level in order to efficiently reduce premature morbidity and mortality. Nevertheless, global strategies are still lacking but are needed to tackle inequalities in health between industrialized countries and the developing world. A global health strategy has to take into account political, epidemiological, environmental, infrastructural and genetic aspects. The Metabolic Syndrome is not a mystery - it is a clinical paradigm and global challenge.

Genetic variation of Neurogenin 3 is slightly associated with hyperproinsulinaemia and progression toward type 2 diabetes

OBJECTIVE

Transcription factor Neurogenin 3 (NGN3) is considered as a candidate gene for the development of type 2 diabetes. The aim of the current study was to investigate the relevance of NGN3 variants for the clinical spectrum of diabetes development and disease progressions.

RESEARCH DESIGN AND METHODS

A total of 552 subjects with increased risk of type 2 diabetes were investigated. They underwent a 75 g OGTT with measurements of plasma glucose, insulin and proinsulin at fasting and at 30, 60, 90 and 120 minutes after the glucose challenge, repeated after 3 years. The NGN3 SNPs, Gly167Arg and Ser199Phe were genotyped.

RESULT

Patients with type 2 diabetes carrying the variant genotype at SNP199 presented with significantly higher proinsulin levels. Proinsulin level was also associated with progression of diabetes mellitus. There was a discrete association of the Ser199Phe variant with evolution of the disease status.

CONCLUSION

A genetic variation in NGN3 gene may be among the genetic determinants involved in the pathogenesis of diabetes.

The importance and effect of dietary fiber in diabetes prevention with particular consideration of whole grain products

The state of prediabetes is characterized by an increase in insulin resistance and a decrease in pancreatic beta cell function. The prestage of type 2 diabetes mellitus can be identified by an impaired glucose tolerance and/or by an impaired fasting blood sugar. Apart from weight loss and increase in physical activity, the development of type 2 diabetes mellitus can also be prevented by dietary changes. A low-fat diet with a dietary fiber intake of more than 30g/d was shown to represent an effective preventive approach. A high-fiber diet has many positive effects on the physical health status. In addition to positive effects in the gastrointestinal tract it has an obvious potential to support weight reduction and to improve disturbances of carbohydrate and fat metabolism. At the present state of knowledge, insoluble dietary fibers as found in whole grain cereal products are considered to be especially effective in the prevention of type 2 diabetes mellitus. A high intake of fruits and vegetables as well as pulses also exerts health-promoting properties. A high-fiber diet also plays an important role in the prevention of obesity and coronary heart diseases.

Prevention of type 2 diabetes--lessons we have learnt for implementation

The challenge today is to implement successful diabetes prevention programs in general health care. Even if not all questions for the prevention of diabetes are answered, we have today overwhelming evidence that diabetes can be prevented or delayed in high risk population through lifestyle modification or pharmacological interventions. This information has to be translated now into well-defined strategies for screening and treating high risk population in daily practice. It is necessary then to develop and implement prevention programs into clinical practice considering scientific aspects and practical requirements during implementation. While translating the scientific evidence into population based intervention strategies more and more questions arise, mostly related to economic and structural requirements during implementation. At the end, giving the right answers to these questions will decide about the success of implemented prevention strategies. Here, we will try to answer some of the questions which arose during the implementation of a prevention management concept into clinical practice. We focus on the development of a structured prevention management program which will enable implementation of diabetes prevention into clinical practice.

A simplified Finnish diabetes risk score to predict type 2 diabetes risk and disease evolution in a German population

AIMS

The FINDRISC questionnaire is a screening tool to estimate the risks for type 2 diabetes as well as asymptomatic type 2 diabetes. We aimed to evaluate its performance to predict diabetes in a German population and to compare its predictive and detective ability in the same population.

METHODS

A total of 552 subjects with increased risk of type 2 diabetes were investigated. All individuals completed the FINDRISC questionnaires and underwent an oral glucose tolerance test (OGTT). All individuals were followed for 3 years and underwent an OGTT again. The performance of the opportunistic screening was assessed with the area under the receiver operating characteristics curve (AUC). An intervention program was carried out for all diabetic and IFG/IGT patients at baseline.

RESULTS

For identification, the asymptomatic type 2 DM was named Condition 1; prediction of type 2 DM risk in the follow-up survey as Condition 2; and diabetes risk predicting in a hypothetical case of survey without intervention program as Condition 3. The ROC-AUC in the three condition were AUC (FINDRISC1)=0.745, AUC (FINDRISC2)=0.789, and AUC (FINDRISC3)=0.775, respectively. A significant association between FINDRISC and evolution of disease was found, but the variation of plasma glucose during the three years follow-up was not associated with FINDRISC. People in the intervention group with an improvement of glucose tolerance had a smaller FINDRISC score than persons with an unchanged or progressive condition of disease.

CONCLUSION

FINDRISC was validated in our study as a simple tool with high performance to predict diabetes risk and less efficient to identify asymptomatic type 2 diabetes. People with lower FINDRISC score will benefit easier from preventive intervention.

[Prevention of diabetes mellitus: the future of German diabetology]

One of the challenges in clinical diabetology today is to develop and implement diabetes prevention management programs for clinical practice. Recent studies have convincingly demonstrated that lifestyle intervention, addressing diet and exercise as well as pharmacologic preventive strategies reduced the risk of progressing from impaired glucose tolerance to diabetes. With respect to the worldwide burden of diabetes these studies offer a compelling evidence-base for the important translation of the research findings into community-based prevention strategies and the development of a National Diabetes Prevention Program. The workgroup "diabetes prevention" from the German Diabetes Association together with the National Action Forum Diabetes and the German Diabetes Foundation developed a concept for a National Program. This comprises a 3-step-intervention: in a first step individuals at high risk to develop type 2 diabetes are identified. The second step provides an intensive group intervention to prevent diabetes and in a third step continuous intervention should facilitate motivation maintenance and evaluation. This third step is the crucial step to maintain the effect in changing lifestyle. Recently, a compendium for diabetes prevention was developed as a practical guideline explaining how to implement prevention programs. This guideline also includes the structure of a national prevention program with a prevention manager having a central role in the concept and suggestions for evaluation and quality control.

Prävention des Diabetes mellitus

Wir stehen wir nach wie vor – bedingt durch die Zunahme der Zahl von Patienten mit Diabetes mellitus Typ 2 (T2DM) – vor einem schwerwiegenden medizinischen, sozialen und ökonomischen Problem. Es ist dringend an der Zeit, Programme zur Primärprävention und gezielten Früherkennung des Diabetes mellitus umzusetzen. Mehrere große internationale Studien belegen, dass die Prävention des Diabetes mellitus durch Lebensstiländerung bei Risikopersonen sowie einer frühen medikamentösen Intervention möglich und erfolgreich ist. Primäres Ziel ist die Stabilisierung und Verbesserung der Glukosetoleranz über eine Verbesserung der Insulinresistenz. Zielwerte zur Umsetzung entsprechender Programme können genau formuliert werden. Damit ist eine der großen Herausforderungen der Diabetologie unserer Zeit die praktische Umsetzung von Programmen zur Diabetes-Prävention.

Die Arbeitsgruppe Prävention der Dresdner Medizinischen Klinik III hat gemeinsam mit der Arbeitsgemeinschaft Prävention des Typ-2-Diabetes der Deutschen Diabetes-Gesellschaft (AG P2) und des Nationalen Aktionsforum Diabetes mellitus (NAFDM) sowie der Deutschen Diabetes-Stiftung (DDS) ein Konzept für ein nationales Präventionsprogramm erarbeitet. Ein dreischrittiges Programmkonzept wurde entwickelt: Erster Schritt ist die Identifikation der Risikopersonen durch Screening, zweiter Schritt eine Intervention zur Diabetes-Prävention durch Schulung, Training und Motivation. Der dritte, für die Nachhaltigkeit entscheidende Schritt ist die kontinuierliche Weiterbetreuung. Für die praktische Umsetzung wurde ein Leitfaden zur Diabetes-Prävention erarbeitet, der Ziele und Maßnahmen der einzelnen Programmschritte spezifiziert. Zudem sieht das im Leitfaden vorgestellte Konzept eine zentrale Rolle für den Präventionsmanager vor und beinhaltet Empfehlungen für eine zentrale Evaluation und Qualitätskontrolle.

Diabetes prevention--from physiology to implementation

One of the major challenges today is the development of prevention programs for the clinical practice. Our aim was to develop a concept for a primary diabetes prevention program to be implemented in general health care. Lifestyle intervention addressing diet and exercise has reduced the diabetes risk by up to 58%. Early preventive pharmacological strategies have yielded a diabetes risk reduction of 25-30%. These findings offer a compelling evidence base, but delivery of intervention and care is essential. The challenge therefore is the management of prevention and intervention programs considering scientific aspects and practical requirements during implementation. The Diabetes Prevention Workgroup at the German Diabetes Association has developed a concept for a decentralized prevention program. Based on the results of the prevention studies, the intervention concept consists of a three-step program including identification of the individuals at high risk to develop type 2 diabetes (1), followed by general intervention based on individual choice (2) and maintained continuous intervention for motivation maintenance (3). Structured prevention programs will enable nationwide prevention of diabetes mellitus without consuming large resources. This process will be challenging and time consuming, requiring many partners but resulting in a profitable "health" investment.

Haplotypes in the promoter region of the ADIPOQ gene are associated with increased diabetes risk in a German Caucasian population

Adiponectin, which is encoded by the ADIPOQ gene, has been shown to modulate insulin sensitivity and glucose homeostasis. Plasma adiponectin levels are decreased in type 2 diabetes and obesity. Genetic variations within the ADIPOQ gene are associated with decreased adiponectin hormone levels. To analyze specific single-nucleotide polymorphisms (SNPs) and their association with T2D, 365 German subjects with T2D and 323 control subjects were screened. Three common SNPs - +45T>G in exon 2, and 2 promoter variants SNPs -11391G>A and -11377C>G - were analyzed. We found that the variant allele of SNP -11391G>A was significantly more frequent in the diabetic patient group than in the control group (p=0.003). Carrying the haplotype of SNP -11391A and SNP -11377C was associated with a 1.50-fold (p=0.03) increase in diabetes risk. The combination of the A-C haplotype and the G-C haplotype was associated with significantly elevated diabetes risk (OR=2.82 (95% CI: 1.35-5.91), p=0.006) after correction for BMI and age. Our observations suggest that diploid combinations of haplotype in the adiponectin gene promoter region contribute to the genetic risk of T2D in individuals from a German Caucasian population.

Mutations and intronic variants in the HNF-1 beta gene in a group of German and Czech Caucasians with type 2 diabetes mellitus and progressive diabetic nephropathy

Mutations in the hepatocyte nuclear factor - 1 beta (HNF-1 beta) gene cause maturity onset diabetes of the young type 5 (MODY 5). A clinical feature of the resulting phenotype besides impaired glucose tolerance is a variety of renal abnormalities, ranging from renal cysts to end-stage renal failure. Using a candidate gene approach we investigated the prevalence of mutations in the HNF-1 beta gene in a group of 63 patients from two different European populations (33 Germans, 30 Czechs) with type 2 diabetes mellitus and diabetic nephropathy diagnosed by increased albuminuria (39 patients) or end-stage renal failure (24 patients). No mutations were found in any of the 9 exons or in a minimal promoter region. Three intronic variants (single nucleotide polymorphisms - SNPs) were detected. The frequencies of these variants showed no difference between the two studied populations and were comparable to data reported from healthy subjects. No association between SNPs or formed haplotypes and any clinical parameters (like age of disease onset, BMI and severity of renal failure) was found. The results confirm that the genetic variations in the HNF-1 beta gene would be a very uncommon cause of progressive nephropathy in patients with type 2 diabetes mellitus.