| 1. |
- Jonsdottir, Berglind, et al.
(författare)
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Thyroid autoimmunity in relation to islet autoantibodies and HLA-DQ genotype in newly diagnosed type 1 diabetes in children and adolescents
- 2013
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Ingår i: Diabetologia. - : Springer Verlag (Germany). - 0012-186X .- 1432-0428. ; 56:8, s. 1735-1742
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Tidskriftsartikel (refereegranskat)abstract
- The aim of this work was to investigate, in children newly diagnosed with type 1 diabetes: (1) the prevalence of autoantibodies against thyroid peroxidase (TPOAb) and thyroglobulin (TGAb); and (2) the association between TPOAb, TGAb or both, with either islet autoantibodies or HLA-DQ genes. less thanbrgreater than less thanbrgreater thanBlood samples from 2,433 children newly diagnosed with type 1 diabetes were analysed for TPOAb and TGAb in addition to autoantibodies against arginine zinc transporter 8 (ZnT8RA), tryptophan zinc transporter 8 (ZnT8WA), glutamine zinc transporter 8 (ZnT8QA), glutamic acid decarboxylase (GADA), insulin (IAA), insulinoma-associated protein-2 (IA-2A), HLA-DQA-B1 genotypes, thyroid-stimulating hormone (TSH) and free thyroxine (T4). less thanbrgreater than less thanbrgreater thanAt type 1 diabetes diagnosis, 12% of the children had thyroid autoantibodies (60% were girls; p andlt; 0.0001). GADA was positively associated with TPOAb (p andlt; 0.001) and with TGAb (p andlt; 0.001). In addition, ZnT8A was associated with both TPOAb (p = 0.039) and TGAb (p = 0.015). DQB1*05:01 in any genotype was negatively associated with TPOAb (OR 0.55, 95% CI 0.37, 0.83, p value corrected for multiple comparisons (p (c)) = 0.012) and possibly with TGAb (OR 0.55, 95% CI 0.35, 0.87, p (c) = 0.07). Thyroid autoimmunity in children newly diagnosed with type 1 diabetes was rarely (0.45%) associated with onset of clinical thyroid disease based on TSH and free T4. less thanbrgreater than less thanbrgreater thanGADA and ZnT8A increased the risk for thyroid autoimmunity at the time of clinical diagnosis of type 1 diabetes, while HLA-DQB1*05:01 reduced the risk. However, the associations between thyroid autoimmunity and HLA-DQ genotype were weak and did not fully explain the co-occurrence of islet and thyroid autoimmunity.
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| 2. |
- Lindskoug, Patrik, et al.
(författare)
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Foreword
- 2013
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Ingår i: Essays in Honour of Michael Bogdan. - 9789154405633 ; , s. 5-8
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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| 3. |
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| 4. |
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| 5. |
- Samuelsson, John, et al.
(författare)
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Poor metabolic control in childhood strongly correlates to diabetes-related premature death in persons <30 years of age-A population-based cohort study
- 2020
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Ingår i: Pediatric Diabetes. - : Wiley-Blackwell Publishing Inc.. - 1399-543X .- 1399-5448. ; 21:3, s. 479-485
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Tidskriftsartikel (refereegranskat)abstract
- Background/objectiveThe importance of metabolic control in childhood regarding excess risk of death in young persons has not been well studied. This registry‐based study aimed to investigate mortality rates and cause of death related to metabolic control in young persons (≤29 years) in Sweden with type 1 diabetes.MethodsAll 12 652 subjects registered in the Swedish pediatric diabetes quality register, from 2006 to 2014, were included. Data were merged with the Swedish Cause of Death Register. Standardized mortality rates were calculated using the official Swedish population register.ResultsOf 68 deaths identified, 38.2% of the deaths were registered as being due to diabetes whereof the major cause of death was acute complications. Overall standardized mortality ratio was 2.7 (2.1‐3.4, 95% CI). Subjects who died from diabetes had a mean HbA1c of 74 ± 19 mmol/mol (8.9 ± 1.7%) during childhood vs 62 ± 12 mmol/mol (7.8 ± 1.1%) in those still alive (P < .001).ConclusionsIn this nationwide cohort of young subjects with type 1 diabetes, there was a high mortality rate compared to the general population. Mean HbA1c in childhood was significantly higher in those who died from diabetes, compared to subjects who were still alive. To decrease mortality in young persons with type 1 diabetes it is essential not only to achieve but also to maintain a good metabolic control during childhood and adolescence.
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| 6. |
- Samuelsson, Mattias, 1976-, et al.
(författare)
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Growth of Ti-C nanocomposite films by reactive high power impulse magnetron sputtering under industrial conditions
- 2012
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Ingår i: Surface & Coatings Technology. - : Elsevier BV. - 0257-8972 .- 1879-3347. ; 206:8-9, s. 2396-2402
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Tidskriftsartikel (refereegranskat)abstract
- Titanium carbide (TiC) films were deposited employing high power impulse magnetron sputtering (HiPIMS) and direct current magnetron sputtering (DCMS) in an Ar-C2H2 atmosphere of various compositions. Analysis of the structural, bonding and compositional characteristics revealed that the deposited films are either TiC and hydrogenated amorphous carbon (a-C:H) nanocomposites, nanocrystalline TiC, or Ti/Tic, depending on the C/Ti ratio. It was found that Ti-C films grown by HiPIMS show a C/Ti ratio of close to 1 for a wide C2H2 flow range (4-15 sccm), with free C ranging from 0 to 20%. Thus, films ranging from near stoichiometric single phase TiC to TiC/a-C:H nanocomposites can be synthesized. This was not the case for DCMS, where films grown using similar deposition rates as for HiPIMS formed larger fractions of amorphous C matrix, thus being nanocomposites in the same C2H2 (above 4 sccm) flow range. For a C/Ti ratio of 1 the resistivity is low (4-8 x 10(2) mu Omega cm) for the HiPIMS films, and high (>100x 10(2) mu Omega cm) for the DCMS films. The hardness also shows a big difference with 20-27 and 6-10 GPa for HiPIMS and DCMS grown films, respectively.
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| 7. |
- Söderström, Ulf, 1947-, et al.
(författare)
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Immigrant childrenwith type 1 diabetes have impaired metabolic control after three years oftreatment : a nation-wide cohort study in Sweden
- 2014
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- Objective: To compare clinical status after three years of treatment and socio-demographic conditions at onset in children with diabetes born to immigrant parents with children to Swedish born parents. Design: Observational nationwide population based cohort-study on prospectively recorded registry data.Setting: All children with diabetes in Sweden and their parents between 2000 and 2010.Patients: 879 children with diabetes born to immigrant parents out of a total of 13 415 children, the immigrant cohort. To these we added 2627 children with diabetes of Swedish born parents, matched for gender, age and year of onset, the Swedish cohort.Main outcome: The immigrant children had a higher median HbA1c, 69 mmol/mol (8.5 %), compared to their Swedish peers 62 (7.8 %), p = 0.002, and the 75th percentile of 72 (8.8 %) vs 70 (8.5 %). There was however no difference in frequency of severe events of hypoglycemia or keto-acidosis between the two cohorts (p = 0.258). A linear regression model with HbA1c as dependent variable pointed out insulin units per kg BW as the main reason for inferior metabolic control, OR 11.410, CI 95% 7.418_15.402, p < 0.001.Conclusions: Children with diabetes born to immigrant parents have worse metabolic status three years after disease onset.
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| 8. |
- Söderström, Ulf, 1947-, et al.
(författare)
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Impaired metabolic control and socio-demographic status in immigrant children at onset of type 1 diabetes
- 2014
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Ingår i: Diabetic Medicine. - : Wiley-Blackwell. - 0742-3071 .- 1464-5491. ; 31:11, s. 1418-1423
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Tidskriftsartikel (refereegranskat)abstract
- Aim: The aim of the present study was to compare clinical and socio-demographic conditions at the onset of Type1 diabetes in children born to immigrant families and children born to Swedish families, and to assess whether those conditions had an impact on metabolic status.Methods and design: This was an observational nationwide population-based matched cohort study on prospectively recorded registry data of all children with diabetes in Sweden and their families during 2000-2010. Out of a total of 13415 children from the Swedish Childhood Diabetes Registry (SWEDIABKIDS), 879 children born to immigrant parents were collected. To these we added 2627 children with Swedish-born parents, matched for gender, age and year of onset of Type1 diabetes.Results: The proportion of low capillary pH (<7.30) at onset was higher in the immigrant cohort [25.8% vs. 16.4% in the Swedish cohort (P<0.001)]. HbA(1c) was also higher [95mmol/mol (10.8%) vs. 88mmol/mol (10.2%), respectively (P<0.001)]. In a logistic regression model with low pH as the dependent variable, we were unable to reveal any significant association to socio-demographic factors, but the odds ratio for HbA(1c) was 0.983 (95%CI 0.976-0.991) and for plasma glucose was 0.953 (95%CI 0.933-0.973).Conclusion: Children born to immigrant parents have lower capillary pH and higher HbA(1c) at diabetes onset. Immigrant families harbour lower socio-demographic living conditions, but this fact does not seem to influence the inferior metabolic condition at diabetes onset.
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| 9. |
- Söderström, Ulf, et al.
(författare)
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National Swedish study of immigrant children with type 1 diabetes showed impaired metabolic control after three years of treatment
- 2016
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Ingår i: Acta Paediatrica. - : WILEY-BLACKWELL. - 0803-5253 .- 1651-2227. ; 105:8, s. 935-939
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Tidskriftsartikel (refereegranskat)abstract
- Aim: This study examined the clinical status and socio-demographic conditions of children with type 1 diabetes at baseline and after three years of treatment, comparing those born to immigrant parents and Swedish parents. Methods: This observational nationwide population-based cohort study used prospectively collected registry data from Swediabkids, the National Quality Registry for Paediatric Diabetes in Sweden from 2000 to 2010. Of the 13 415 children with type 1 diabetes, there were 879 born to immigrant parents. We selected three children born to Swedish parents from the same registry for each immigrant child matching them by gender, age and year of diabetes onset (n = 2627; with 10 control children missing probably due to the matching procedure). Results: Immigrant children had a higher median glycated haemoglobin level (HbA1c) than their Swedish peers, but there was no difference in the frequency of hypoglycaemia or ketoacidosis between the two cohorts. A linear regression model with HbA1c as a dependent variable showed that insulin units per kilogram of body weight were the main reason for inferior metabolic control. Conclusion: Children with type 1 diabetes born to immigrant parents had inferior metabolic control three years after disease onset compared to children with Swedish born parents. Social family support and educational coping programmes are needed to improve treatment outcomes in immigrants with diabetes.
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| 10. |
- Söderström, Ulf, 1947-
(författare)
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Type 1 diabetes in children with non-Swedish background : epidemiology and clinical outcome
- 2014
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Sweden holds third place of diabetes incidence in young people after Finland and Sardinia. One fifth of the population is nowadays of foreign descent. We have a substantial number of immigrants from countries where the risk for T1D is considerably lower. Migration as a natural experiment is a concept to assess the risk for diabetes in offspring of immigrant parents and assess the interaction between genetics (genotype) and the impact of environment (phenotype).Aims: To study the risk of incurring diabetes for children of immigrant parents living in Sweden (I) and further study the risk if the child is born in Sweden or not (II); to specifically study and evaluate if children from East Africa have increased risk to develop T1D (III). To investigate if clinical and sociodemographic status at T1D onset differs between immigrant children compared to their Swedish indigenous peers (IV). Finally to study the clinical outcome and the impact of socio-demographic factors at diabetes onset after three years of treatment (V).Methods: All five studies are observational, nationwide and population based, on prospectively collected data. Statistics mainly by logistic and linear regressions.Results: Parental country of origin is a strong determinant for diabetes in the offspring. Children born to immigrant parents seem to keep their low risk compared to their Swedish peers (I). When adding the factor of being born in Sweden, the pattern changed; there was a significantly (p < 0.001) increased risk for T1D if the child was born in Sweden (II). East Africans have a substantial risk for T1D and especially if the children are born in Sweden (III). Immigrant children and adolescents have worse metabolic start at T1D onset compared to their indigenous Swedish peers (IV). After 3 years of treatment, the immigrant children had a sustained higher median HbA1c, compared to their Swedish peers (V).Conclusions: Genotype and influences during fetal life or early infancy have an important impact for the risk of T1D pointing towards epigenetics playing a substantial role. Children with an origin in East Africa have a high risk of incurring T1D. Immigrant children have worse metabolic start at T1D onset, which sustains after three years of treatment
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