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Featured researches published by Thomas Kapellen.


Obesity Reviews | 2001

Clinical aspects of obesity in childhood and adolescence

Wieland Kiess; Angela Galler; Andrea Reich; Grit Müller; Thomas Kapellen; J. Deutscher; K. Raile; Jürgen Kratzsch

The level of fatness of a child at which morbidity acutely and/or later in life increases is determined on an acturial basis. Direct measurements of body fat content, e.g. hydrodensitometry, bioimpedance, or DEXA, are useful tools in scientific studies. However, body mass index (BMI) is easy to calculate and is generally accepted now to be used to define obesity in children and adolescents clinically. An increased risk of death from cardiovascular disease in adults has been found in subjects whose BMI had been greater than the 75th percentile as adolescents. Childhood obesity seems to substantially increase the risk of subsequent morbidity whether or not obesity persists into adulthood. The genetic basis of childhood obesity has been elucidated to some extent through the discovery of leptin, the ob gene product, and the increasing knowledge on the role of neuropeptides such as POMC, neuropeptide Y (NPY) and the melanocyte concentrating hormone receptors (for example, MC4R). Environmental/exogenous factors largely contribute to the development of a high degree of body fatness early in life. Twin studies suggest that approximately 50% of the tendency toward obesity is inherited. There are numerous disorders including a number of endocrine disorders (Cushings syndrome, hypothyroidism, etc.) and genetic syndromes (Prader‐Labhard–Willi syndrome, Bardet Biedl syndrome, etc.) that can present with obesity. A simple diagnostic algorithm allows for the differentiation between primary or secondary obesity. Among the most common sequelae of primary childhood obesity are hypertension, dyslipidemia, back pain and psychosocial problems. Therapeutic strategies include psychological and family therapy, lifestyle/behaviour modification and nutrition education. The role of regular exercise and exercise programmes is emphasized. Surgical procedures and drugs used in adult obesity are still not generally recommended in children and adolescents with obesity. As obesity is the most common chronic disorder in industrialized societies, its impact on individual lives as well as on health economics has to be recognized more widely. This review is aimed towards defining the clinical problem of childhood obesity on the basis of current knowledge and towards outlining future research areas in the field of energy homoeostasis and food intake in relation to child health. Finally, one should aim to increase public awareness of the ever increasing health burden and economic dimension of the childhood obesity epidemic that is present around the globe.


Pediatrics | 2004

Insulin sensitivity among obese children and adolescents, according to degree of weight loss.

Thomas Reinehr; Wieland Kiess; Thomas Kapellen; Werner Andler

Objective. Insulin sensitivity is impaired among some obese children, reflecting an atherogenic risk factor profile for the affected subjects. This study was performed to examine the amount of weight reduction required to improve insulin sensitivity. Methods. We studied changes in insulin sensitivity indices (ISIs) for glucose metabolism (homeostasis model assessment and quantitative insulin sensitivity check index) and fat metabolism (free fatty acids) during a 1-year period among obese children who attended an obesity intervention program. The children were divided into 4 groups according to their changes in body mass index (BMI) SD score (SDS), as follows: group I, decrease in SDS-BMI of ≥0.5; group II, decrease in SDS-BMI of ≥0.25 to <0.5; group III, decrease in SDS-BMI of <0.25; group IV, increase in SDS-BMI. Results. Fifty-seven obese children (age range: 6–14 years; median age: 10 years; 46% boys) were included in the study. The 4 groups did not differ with respect to age, gender, degree of overweight (SDS-BMI), or ISI values at baseline. An increase in SDS-BMI (group IV, n = 12) was followed by a significant decrease in ISI values. The ISIs improved for group I (n = 9), whereas there were no significant changes in these parameters for group II (n = 21) and group III (n = 15). Conclusions. During a 1-year period, an increase in weight among obese children was associated with a decrease in insulin sensitivity. Weight loss was followed by significant improvement in insulin sensitivity for glucose and fat metabolism but only if the SDS-BMI decreased by ≥0.5 during the 1-year period.


Hormone Research in Paediatrics | 2007

Evaluation of patients' opinion and metabolic control after transfer of young adults with type 1 diabetes from a pediatric diabetes clinic to adult care.

F.P. Busse; P. Hiermann; Angela Galler; Michael Stumvoll; T. Wiessner; Wieland Kiess; Thomas Kapellen

Background: Transferring adolescents with diabetes from pediatric to adult care remains a challenge and the outcome is often unknown. The aims of this study were to determine the patients’ perception of transfer arrangements and to analyze health care use and metabolic control. Methods: A telephone questionnaire was conducted for patients who had been transferred from the pediatric clinic to adult care between 1995 and 2003. Of 161 identified patients, 101 (58 females, 43 males, mean age 22.1 ± 2.4 years) were interviewed. Pediatric case notes and, if available (n = 44), current notes were analyzed to validate answers from the interview. Results: After transfer, 52.5% of patients changed their health care provider at least once. The mean frequency of changes was 1.47. There was a significant decrease in clinic attendance rate after transition (8.5 ± 2.3/years vs. 6.7 ± 3.2/years). Patients criticized the lack of arrangements, poor information about transfer and the specific age for transition (18 years) set by legislation. The transfer was considered a negative experience by 58 patients. The patients assumed their metabolic control (HbA1c) was better than it really was (7.5 ± 1.3% vs. 8.3 ± 1.6%, p < 0.05). Actual HbA1c from case notes pre- and post-transfer did not change significantly (8.5 ± 1.5% vs. 8.4 ± 1.7%, n = 44, p = 0.441). Conclusion: The establishment of transition clinics and closer cooperation between specialists in pediatric and adult medicine is mandatory. Such changes are demanded by patients and would ensure better uptake of health care services after transfer.


Best Practice & Research Clinical Endocrinology & Metabolism | 2008

Adipocytes and adipose tissue

Wieland Kiess; Stephanie Petzold; Madlen Töpfer; Antje Garten; Susann Blüher; Thomas Kapellen; Antje Körner; Jürgen Kratzsch

An epidemic of obesity is taking place in most societies around the world. Overall obesity substantially increases the risk of subsequent morbidity. In children and adolescents the degree of body fat mass depends upon ethnic background, gender, developmental stage and age. Obesity is characterized by increases in the number or size of fat cells, or a combination of both. It is generally believed that the number of fat cells depends on age of onset and degree of obesity. This chapter provides information on intrauterine growth of fetal adipose tissue, the earliest period of onset of proliferation, and some of the factors that interact to enhance or suppress development. Fetal adipose tissue development is regulated by the complex interaction of transcription factors, nutrients and adipocytokines. Maternal, endocrine, and paracrine factors also influence specific changes in angiogenesis, adipogenesis, and metabolism. During embryogenesis and in fetal life, leptin and adiponectin, two important adipocytokines, are present at high concentrations in the circulation and in tissues. Developmental stages and metabolic processes influenced by specific hormones and paracrine factors have been identified through examination of the offspring of obese and diabetic pregnancies, hormonal manipulation during late pregnancy in animal models, and the use of cell cultures. Collectively, the results of the studies cited herein delineate the basis for imprinting or conditioning of fetal pre-adipocytes at the paracrine/autocrine level, and of fetal adipose tissue development and metabolism.


Diabetic Medicine | 2008

Comparison of continuous subcutaneous insulin infusion (CSII) and multiple daily injections (MDI) in paediatric Type 1 diabetes: a multicentre matched-pair cohort analysis over 3 years.

B. I. Jakisch; V. M. Wagner; B. Heidtmann; R. Lepler; P‐M. Holterhus; Thomas Kapellen; C. Vogel; Joachim Rosenbauer; Reinhard W. Holl

Aims  To conduct a multicentre, matched‐pair cohort analysis comparing glycaemic control and adverse events of continuous subcutaneous insulin infusion (CSII) with multiple daily injections (MDI) in paediatric patients.


Hormone Research in Paediatrics | 2003

Type 2 diabetes mellitus in children and adolescents: a review from a European perspective.

Wieland Kiess; Antje Böttner; K. Raile; Thomas Kapellen; Grit Müller; Angela Galler; R. Paschke; Martin Wabitsch

Changes in food consumption and exercise are fuelling a worldwide increase in obesity in children and adolescents. As a consequence of this dramatic development, an increasing rate of type 2 diabetes mellitus has been recorded in children and adolescents in the USA and, more recently, in many countries around the world. Both genetic and environmental factors contribute to the pathogenesis of type 2 diabetes. Lower susceptibility in white Caucasians and higher susceptibility in Asians, Hispanics and blacks have been noted. There is a high hidden prevalence and a lack of exact data on the epidemiology of the disease in Europe: in Germany only 70 patients below the age of 15 years were identified in the systematic, nationwide DPV (Diabetessoftware für prospektive Verlaufsdokumentation) diabetes survey, but our calculations suggest that more than 5000 young people in Germany at present would meet the diagnostic criteria of type 2 diabetes. In Australasia, the prevalence of type 2 diabetes is reportedly high in some ethnic groups and again is linked very closely to the obesity epidemic. No uniform and evidence-based treatment strategy is available: many groups use metformin, exercise programmes and nutritional education as a comprehensive approach to treat type 2 diabetes in childhood and adolescence. The lack of clear epidemiological data and a strong need for accepted treatment strategies point to the key role of preventive programmes. Prevention of obesity will help to counteract the emerging worldwide epidemic of type 2 diabetes in youth. Preventive programmes should focus on exercise training and reducing sedentary behaviour such as television viewing, encouraging healthy nutrition and supporting general education programmes since shorter school education is clearly associated with higher rates of obesity and hence the susceptibility of an individual to acquire type 2 diabetes.


Diabetes Care | 2008

Arterial hypertension determined by ambulatory blood pressure profiles: contribution to microalbuminuria risk in a multicenter investigation in 2,105 children and adolescents with type 1 diabetes.

Axel Dost; Christoph Klinkert; Thomas Kapellen; Andreas Lemmer; Andrea Naeke; Matthias Grabert; Joachim Kreuder; Reinhard W. Holl

OBJECTIVE—Arterial hypertension is a key player in the development of diabetes complications. We used a nationwide database to study risk factors for abnormal 24-h blood pressure regulation and microalbuminuria in children and adolescents with type 1 diabetes. RESEARCH DESIGN AND METHODS—Ambulatory blood pressure monitoring was performed in 2,105 children and adolescents from 195 pediatric diabetes centers in Germany and Austria. Individual least median squares (LMS)-SD scores were calculated for diurnal and nocturnal systolic (SBP), diastolic (DBP), and mean arterial (MAP) blood pressure according to normalized values of a reference population of 949 healthy German children. The nocturnal blood pressure reduction (dipping) was calculated for SBP as well as DBP. RESULTS—In diabetic children, nocturnal blood pressure in particular was significantly elevated (SBP +0.51, DBP +0.58, MAP +0.80 LMS-SD) and dipping of SBP DBP, and MAP was significantly reduced (P < 0.0001). Age, diabetes duration, sex BMI, A1C, and insulin dose were related to altered blood pressure profiles; dipping, however, was only affected by age, female sex, and A1C. The presence of microalbuminuria was associated with nocturnal DBP (P < 0.0001) and diastolic dipping (P < 0.01). CONCLUSIONS—Our observations revealed a clear link between the quality of metabolic control and altered blood pressure regulation even in pediatric patients with short diabetes duration. Nocturnal blood pressure in particular seems to mainly contribute to diabetes complications such as microalbuminuria.


European Journal of Pediatrics | 2005

Diabetes mellitus type 2 in childhood and adolescence in Germany and parts of Austria

Edith Schober; Reinhard W. Holl; Matthias Grabert; Angelika Thon; Birgit Rami; Thomas Kapellen; Ora Seewi; Thomas Reinehr

A rise in the prevalence of type 2 diabetes mellitus (T2 DM) in adolescence and childhood has been observed in North America, especially in minority populations such as the American Indians, during the past decades [2]. Few epidemiological data on the incidence of the disease in young people exist in Europe [1, 4, 5]. To obtain an estimate of the magnitude of this problem in Germany, we tried to evaluate the prevalence of T2 DM in people under the age of 20 years using the DPV-Wiss database, a database covering half of the existing diabetes patients in this age group in Germany.


Pediatric Diabetes | 2008

Use of complementary and alternative medicine in children with type 1 diabetes mellitus - prevalence, patterns of use, and costs.

Karen Dannemann; Wolfgang Hecker; Holger Haberland; Antje Herbst; Angela Galler; Thorsten Schäfer; Elmar Brähler; Wieland Kiess; Thomas Kapellen

Background:  Complementary and alternative medicine (CAM) is increasingly used in adults and children. Studies on CAM in diabetes have mainly focused on the adult population and its use among children with type 1 diabetes has not been well characterized.


Diabetes Care | 2015

Rates of Diabetic Ketoacidosis: International Comparison With 49,859 Pediatric Patients With Type 1 Diabetes From England, Wales, the U.S., Austria, and Germany

David M. Maahs; Julia M. Hermann; Naomi Holman; Nicole C. Foster; Thomas Kapellen; Jeremy Allgrove; Desmond A. Schatz; Sabine E. Hofer; Fiona Campbell; Claudia Steigleder‐Schweiger; Roy W. Beck; Justin Warner; Reinhard W. Holl

OBJECTIVE Diabetic ketoacidosis (DKA) in children and adolescents with established type 1 diabetes is a major problem with considerable morbidity, mortality, and associated costs to patients, families, and health care systems. We analyzed data from three multinational type 1 diabetes registries/audits with similarly advanced, yet differing, health care systems with an aim to identify factors associated with DKA admissions. RESEARCH DESIGN AND METHODS Data from 49,859 individuals <18 years with type 1 diabetes duration ≥1 year from the Prospective Diabetes Follow-up Registry (DPV) initiative (n = 22,397, Austria and Germany), the National Paediatric Diabetes Audit (NPDA; n = 16,314, England and Wales), and the T1D Exchange (T1DX; n = 11,148, U.S.) were included. DKA was defined as ≥1 hospitalization for hyperglycemia with a pH <7.3 during the prior year. Data were analyzed using multivariable logistic regression models. RESULTS The frequency of DKA was 5.0% in DPV, 6.4% in NPDA, and 7.1% in T1DX, with differences persisting after demographic adjustment (P < 0.0001). In multivariable analyses, higher odds of DKA were found in females (odds ratio [OR] 1.23, 99% CI 1.10–1.37), ethnic minorities (OR 1.27, 99% CI 1.11–1.44), and HbA1c ≥7.5% (≥58 mmol/mol) (OR 2.54, 99% CI 2.09–3.09 for HbA1c from 7.5 to <9% [58 to <75 mmol/mol] and OR 8.74, 99% CI 7.18–10.63 for HbA1c ≥9.0% [≥75 mmol/mol]). CONCLUSIONS These multinational data demonstrate high rates of DKA in childhood type 1 diabetes across three registries/audits and five nations. Females, ethnic minorities, and HbA1c above target were all associated with an increased risk of DKA. Targeted DKA prevention programs could result in substantial health care cost reduction and reduced patient morbidity and mortality.

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