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Articles by S. Simsek
Total Records ( 3 ) for S. Simsek
  A. W. Van Deutekom , R. J. Heine and S. Simsek
  Latent autoimmune diabetes in the adult (LADA) is a slowly progressive form of autoimmune diabetes, characterized by diabetes-associated autoantibody positivity. A recent hypothesis proposes that LADA consists of a heterogeneous population, wherein several subgroups can be identified based on their autoimmune status. A systematic review of the literature was carried out to appraise whether the clinical characteristics of LADA patients correlate with the titre and numbers of diabetes-associated autoantibodies. We found that the simultaneous presence of multiple autoantibodies and/or a high-titre anti-glutamic acid decarboxylase (GAD)-compared with single and low-titre autoantibody-is associated with an early age of onset, low fasting C-peptide values as a marker of reduced pancreatic B-cell function, a high predictive value for future insulin requirement, the presence of other autoimmune disorders, a low prevalence of markers of the metabolic syndrome including high body mass index, hypertension and dyslipidaemia, and a high prevalence of the genotype known to increase the risk of Type 1 diabetes. We propose a more continuous classification of diabetes mellitus, based on the finding that the clinical characteristics gradually change from classic Type 1 diabetes to LADA and finally to Type 2 diabetes. Future studies should focus on determining optimal cut-off points of anti-GAD for differentiating clinically relevant diabetes mellitus subgroups.
  S. Simsek , C. G. Schalkwijk and B. H. R. Wolffenbuttel
  Aims  To examine whether high-dose statin therapy in Dutch European patients with Type 2 diabetes and dyslipidaemia influenced variables of glycaemic control.

Methods  The CORALL study, which was a 24-week, open-label, randomized, parallel-group, phase IIIb, multi-centre study, was designed to compare the cholesterol-lowering effects of rosuvastatin compared with atorvastatin in patients with Type 2 diabetes. Fasting plasma glucose levels and HbA1c levels were collected at baseline and at 6 and 18 weeks.

Results  Treatment with the highest dose of statins, i.e. atorvastatin 80 mg and rosuvastatin 40 mg at 18 weeks from baseline, was associated with increase in HbA1c levels; baseline 57 ± 11 mmol/l (7.4 ± 1.0%) to 61 ± 14 mmol/mol (7.7 ± 1.3%) (range 5.0-11.9) for atorvastatin (P = 0.003) and from baseline 60 ± 11 mmol/mol (7.6 ± 1.0%) to 63 ± 13 mmol/mol (7.9 ± 1.2%) (range 5.7-12.3) for rosuvastatin (P < 0.001). Mean fasting plasma glucose increased from baseline 8.7 ± 2.4 mmol/l to 9.5 ± 3.0 mmol/l upon treatment with atorvastatin 20 mg (P = 0.002) and 9.0 ± 3.0 mmol/l after treatment with 80 mg (not significant compared with baseline). The mean fasting plasma glucose did not change after treatment with rosuvastatin (9.1 ± 2.7 mmol/l at baseline, 8.9 ± 2.7 mmol/l with 10 mg, 9.4 ± 2.9 mmol/l with 40 mg).

Conclusions  Glycaemic control deteriorated in patients with diabetes following high-dose statin therapy. Future controlled studies are needed to verify these findings and, if confirmed, determine whether such changes represent a true decline in glycaemic control. Presently, it appears that, based on the overwhelming prospective trial data available, the preventive effect of statin therapy supersedes that of the slight increase in HbA1c.

  S. F. Bakker , F. Pouwer , M. E. Tushuizen , R. P. Hoogma , C. J. Mulder and S. Simsek
 

Aims

Type 1 diabetes mellitus and coeliac disease are two chronic illnesses associated with each other. Both diseases and their treatments can seriously impair quality of life. The objective of the present study was to investigate health-related quality of life in adult patients diagnosed with both Type 1 diabetes and coeliac disease and compare this with healthy control subjects and control subjects who have Type 1 diabetes only.

Methods

A generic measure of health-related quality of life (RAND-36) and a measure of diabetes-specific quality of life (DQOL) questionnaires were sent to patients diagnosed with both Type 1 diabetes and coeliac disease. The control group consisted of patients with Type 1 diabetes without coeliac disease matched for age, gender and socio-economic status. Generic quality of life scores were compared with data from healthy Dutch control subjects.

Results

Fifty-seven patients with Type 1 diabetes and coeliac disease were included and no associations between clinical characteristics and quality of life were observed. Women reported a lower quality of life in social functioning, vitality and mental health than men (all < 0.05). A lower diabetes-specific quality of life was observed regarding diabetes-related worries and social worries in patients with Type 1 diabetes and coeliac disease compared with patients with Type 1 diabetes. Compared with healthy control subjects, quality of life in patients with Type 1 diabetes and coeliac disease was significantly lower, particularly social functioning (Cohen's d = 0.76) and general health perception (Cohen's d = 0.86).

Conclusions

The additional diagnosis of coeliac disease and treatment by gluten-free diet in adult patients with Type 1 diabetes has a considerable, negative impact on quality of life and diabetes-specific quality of life. Women are particularly affected and social functioning and general health perception is compromised.

 
 
 
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