Cardiovascular complications in type 1 diabetes mellitus

Although the issue of cardiovascular complications in type 2 diabetic patients is widely discussed, and recommendations for such screening are available, it is less common to do so for type-1 diabetes. Yet, independent of age, the mortality rate due to ischaemic cardiac disease is higher among type 1 diabetic patients (both male and female) than in the general population. Type 1 diabetic patients have certain specific characteristics related not only to atherosclerotic plaque and cardiovascular risk factors, but also to their capacity for physical activity and to the prevention of cardiovascular complications induced by hypoglycaemia.     

Cardiovascular disease in type 1 diabetes mellitus

The association between type 1 diabetes and coronary heart disease has become very clear since the late 1970. It has been demonstrated that there is an important increased risk in morbidity and mortality caused by coronary artery disease in young adults with type 1 diabetes compared with the non diabetic population. The underlying pathogeneses is still poorly understood. While the role of glycemic control in the development of microvascular disease complication is well established its role in CVD in patients with DM1 remains unclear with epidemiologic studies reporting conflicting data. Recent findings from the DCCT/EDIC showed that prior intensive diabetes treatment during the DCCT was associated with less atherosclerosis, largely because of reduced level of HbA1c during the DCCT. The improvement of glycemic control itself appeared to be particularly effective in younger patients with shorter duration of the disease. Other analyses suggested the glycemia may have a stronger effect on CAD in patients without than in those with albuminúria. Other major determinants of coronary artery disease are the components of metabolic syndrome and the surrogate measure of insulin resistence: eGDR. It is proposed that patients with DM1 should have aggressive medical therapy, risk factor modification and careful monitoring not only of his blood sugar but also of the other processes involved in the atherosclerotic process, mostly the ones with family history of type 2 diabetes.     

Infections in children with type 1 diabetes mellitus

To identify the incidence, type, severity and risk factors of common infections in children with type 1 diabetes mellitus (DM). In this prospective observational study design, 125 children with type 1 DM (group1) and age and sex matched 125 non-diabetic children (group2) were followed up for 12 months from a tertiary care children hospital in Chennai. Infections encountered were documented in both the groups throughout the study period. Risk factors were analyzed. Among the diabetic children 46.2% had infections and the total episodes of infections were significantly high (p?=?0.006). Skin and soft tissue infections (p?=?0.03) and urinary tract infections (UTI) (p?=?0.002) were significantly higher in diabetic children and they were more prone to recurrent infections. Mean HbA1c was significantly higher among the diabetic children with skin infections. Children with type 1 DM are more prone to skin and soft tissue infections and UTI. Skin infections are more severe and these children have higher HbA1c levels.     

Beneficial effects of flexible insulin therapy in children and adolescents with type 1 diabetes mellitus

Abstract. The purpose of this study was to determine the feasibility of a flexible multiple daily insulin (FMDI) regimen in routine pediatric diabetes care by comparing HbA_1c, body mass index (BMI), and episodes of severe hypoglycemia (SH) before and after initiation of FMDI therapy. Data from 44 patients (2–16 years old), on a conventional insulin (CI) regimen, were collected during quarterly diabetes clinic visits. These patients were transitioned from CI to FMDI regimen: pre-meal lispro (bolus) and once or twice daily Humulin Ultralente with or without bedtime Humulin NPH as the basal insulin. There was a significant improvement in HbA_1c in prepubertal (9.3%±1.3% vs. 8.0%±1.1%, p<0.002) and pubertal subjects (9.2%±1.0% vs. 8.2%±0.9%, p<0.001). Pubertal subgroup demonstrated an increase in BMI (21.3±3.1 vs. 22.7±3.2 kg/m², p<0.0001) after one year. The rate of SH was decreased in both prepubertal (p<0.01) and pubertal (p<0.05) groups of patients on FMDI therapy. The use of FMDI in a general pediatric diabetic population is a feasible therapeutic option for maintenance and possible improvement of glycemic control. It may effectively decrease the HbA_1c, and reduce hypoglycemic episodes, without producing an abnormal increase in BMI.     

Exocrine pancreas functions in children with type 1 diabetes mellitus

Background and study aimWe evaluated exocrine pancreas functions using a noninvasive indicator in a case–control study conducted on children and adolescents diagnosed with type 1 diabetes mellitus.Patients and methodsSixty-seven patients who participated in a summer camp were enrolled in this study. Nineteen healthy children in the same age group were assigned to the control group. Fecal pancreatic elastase was assayed using the enzyme-linked immunosorbent assay technique. Values higher than 200 µg/g were considered an indication of sufficient exocrine pancreatic functioning, values between 100 µg/g and 200 µg/g were considered mild exocrine pancreatic insufficiency, and values below 100 µg/g were considered severe exocrine pancreatic insufficiency.ResultsThe mean concentration of fecal elastase was 158.38 ± 59.67 µg/g. The patients were assigned to three groups according to these values. Thirteen patients (22%) had sufficient fecal elastase levels, whereas 36 patients (62%) had mildly insufficient levels, and nine patients (16%) had severely insufficient fecal elastase concentrations. The levels of fecal elastase, amylase, lipase, and zinc were significantly different between the patients and controls (p < 0.001). Only the duration of diabetes was significantly different between patients with different severities of exocrine pancreatic insufficiency (p = 0.037). Additionally, the group with severe pancreatic insufficiency had more frequent hypoglycemic attacks.ConclusionExocrine pancreatic insufficiency may develop in children with diabetes, and hypoglycemia attacks are observed more frequently depending on the severity of pancreatic insufficiency.     

Frequency of Hashimoto's thyroiditis in children with type 1 diabetes mellitus

A total of 1419 children with type 1 diabetes mellitus was investigated in order to assess the true frequency of Hashimoto's thyroiditis (HT), diagnosed by microsomal and/or thyroglobulin autoantibodies, by ultrasound and in many cases also by fine needle biopsy. According to these criteria, 55 cases (3.9%) of HT were identified, a number significantly higher (P<0.0001) than the distribution reported in the normal paediatric population. No typical antibody pattern was seen prior to the onset of HT, nor was an antibody threshold level found which could have been diagnostic for this disease. Patients with subclinical hypothyroidism were treated withl-thyroxine and were investigated regarding the behaviour of anti-thyroid autoantibodies; however, no significant changes were seen. The data showed a high frequency of HT in diabetic children, and therefore we recommend that children with type 1 diabetes mellitus should be screened for thyroid autoantibodies and those positive should undergo periodic thyroid function testing.A collaborative study of the AASGPED-Alpe Adria Study Group of Pediatric Endocrinology and Diabetology     

Microvascular autoregulation in children and adolescents with type 1 diabetes mellitus

Aims/hypothesis

Deterioration of microvascular function may have an early onset in individuals with type 1 diabetes mellitus. We hypothesised that microvascular autoregulation is impaired in children with type 1 diabetes and can be detected non-invasively by postocclusive reactive hyperaemia (PORH).

Methods

Microvascular autoregulation was assessed in 58 children with type 1 diabetes and 58 age- and sex-matched healthy controls by PORH using laser Doppler fluxmetry. Baseline perfusion, biological zero (defined as a ‘no flow’ laser Doppler signal during suprasystolic occlusion), peak perfusion following occlusion, time to peak and recovery time (time until baseline perfusion is resumed) were recorded and compared between the groups.

Results

Peak perfusion was higher in children with type 1 diabetes than in healthy controls (1.7?±?0.93?AU [arbitrary units] vs 1.29?±?0.46?AU; p?=?0.004), and biological zero was lower in children with type 1 diabetes vs controls (0.14?±?0.04?AU vs 0.19?±?0.04?AU; p?Conclusions/interpretation PORH reveals impaired microvascular autoregulation in children with type 1 diabetes. The higher peak perfusion might reflect a decline in the vasoconstrictive ability of arteriolar smooth muscle cells upstream of capillary beds in children with type 1 diabetes.     

Complementary and alternative medicine in children with type 1 diabetes mellitus

Objective: Complementary and alternative medicine (CAM) is increasingly utilized in adults and children for treatment of various conditions. Studies on CAM in diabetes have mainly focused on the adult population and its application in children has not been well established. The aim of this study was to examine the prevalence and characteristics of CAM use in Turkish children with type 1 diabetes mellitus (T1DM). Methods: The information was acquired by a questionnaire completed by a face-to-face interview with the parents of children with T1DM. Results: A total of 195 subjects (mean age: 14.02±4.7 years; F/M: 103/92) were included in this survey. Use of CAM was reported in 85 subjects (43.6%). Herbal medicines were used in 64 subjects (75.3%). Sixty-nine subjects (81.2%) did not inform the diabetes specialist about CAM use. Thirty-eight subjects (44.7%) evaluated CAM as efficacious. Only 3 subjects (3.5%) interrupted the insulin injections to use CAM. No relationships were found between CAM use and parental education or insulin dose. There were significant correlations between CAM use and higher family income (p=0.027), urban residence (p=0.05), presence of complications (p=0.03), dissatisfaction with medical therapy (p=0.034) and prior CAM use among parents (p=0.001). Conclusion: CAM use is a frequent practice among diabetic children, which is usually not shared with their physicians and sometimes leads to cessation of medical treatment. Conflict of interest:None declared.     

Cerebral vasoreactivity in children and adolescents with type 1 diabetes mellitus

It is well established in clinical and experimental settings that diabetes mellitus, especially if long lasting, impairs autoregulation of cerebral blood flow (CBF). However, the onset and the course of development of this dysfunction remain unknown. We hypothesized that assessment of autoregulatory functions of cerebral arteries in children with relatively short duration of type 1 diabetes mellitus may provide an insight into the pathophysiology of the development of impaired autoregulation of CBF. Such a dysfunction of vasodilation of cerebral arteries can be assessed by transcranial Doppler. Therefore, to examine whether and when autoregulation of CBF becomes affected by diabetes, we used transcranial Doppler and a pCO2 challenge in 17 males between the ages of 12-20 years with type 1 diabetes mellitus of 0.2-16 years duration and with varying degrees of glucose control. The results were compared with age-matched, healthy, nondiabetic controls. The CO2 challenge increased cerebral blood-flow velocities and decreased the pulsatility index. These changes were not influenced by the presence or duration of diabetes, insulin dose, or degree of diabetic control.     

SGLT-2抑制剂治疗1型糖尿病的心血管保护作用

T1DM与早发性心血管疾病密切相关。有些T1DM患者血糖控制未达标,需辅助疗法以助其实现达标。钠-葡萄糖协同转运蛋白2抑制剂(SGLT-2i)是独立于Ins作用机制的新型降糖药,SGLT-2i辅助治疗T1DM可改善血糖、血脂、血尿酸、尿蛋白异常,降低体重、BP等心血管事件高危因素且减少每日Ins用量。本文对SGLT-2i联合Ins辅助治疗T1DM的作用机制、心血管保护作用及安全性进行综述。     

Role of immune dysfunction in pathogenesis of type 1 diabetes mellitus in children

Objective:To investigate the function of cytokines,chemokines,and regulatory T cells(Tregs)in the pathogenesis of Type 1 diabeles mellitus(T1DM)in children.Methods:A total of 35 children with T1DM and 30 healthy controls were enrolled in this study.Levels of serum cytokines(IL-1α,IL-6,IL-10,IL-12,and TNF-α)and chemokines(MIP-1α,MIP-1βand MCP-1)were detected by enzyme-linked immunosorbent assay.Peripheral blood mononuclear cells(PBMCs)were isolated and culture supernatant of phytohaemagglutinin(PHA)-stimulatcd PBMCs was subjecled to ELISA for levels of cytokines(IL-1α,IL-6,IL-10,IL-12 and TNV-α)in T1DM and control group.Furthermore,flow cytometty was used to determine the percentage of Tregs in PBMCs of two groups.Results:Levels of serum cytokines including IL-1α,IL-6,IL-10 andd TNF-αas well as chemokines,such as MIP-1αand MIP-1βin children with T1DM children were significantly higher than those in healthy controls(P0.05,respectively).PBMCs with PHA stimulation in T1DM group secreted more IL-1αand TNF-α(P0.05,respectively),but less IL-10(P0.05),as compared with control group.Furthermore,the proportion of CD4~+,CD25~+,Foxp3.Tregs in PBMCs isolated from children with T1DM was obviously lower than those in heathy controls(P0.05).Conclusions:Immune dysfunction.with uprcgulation of inflanunatory factors such as IL-1α.IL-6.TNF-αand MIP-1α.downregulation of IL-10 and Tregs,plays an important role in the pathogenesis of T1DM in children.     

Heterogeneity of type 1 diabetes mellitus

Type 1 diabetes (T1D) comprises all forms of autoimmune-mediated and idiopathic beta-cell destruction leading to absolute insulin deficiency. The etiological heterogeneity of T1D has been recognized for the last decades, but it has been divided into only two subtypes so far: autoimmune (T1D)A and non-autoimmune (T1D)B mediated. Polygenic T1DA (isolated or associated to other autoimmune diseases) is the most prevalent type of T1D. T1DA might be part of rare monogenic syndromes related to mutations in the autoimmune regulator gene (AIRE) and FOXp3. Non-autoimmune forms of T1D correspond to approximately 4 to 7% of newly diagnosed T1D and include T1DB, as well as other types of atypical diabetes, for example fulminant type 1 diabetes and adult ketosis-prone diabetes. A new expression of diabetes in young with insulin resistance and obesity, along with the presence of pancreatic autoimmunity markers, namely auto-antibodies to islet cell antigens, is called double diabetes (DD), T1DA plus type 2 diabetes. Evidence has been collected concerning the potential effect of obesity-linked cytokines in amplifying the autoimmune response in DD. Therefore all these issues are presented and discussed in this review as the concept of heterogeneity of Type 1 Diabetes.     

暴发性1型糖尿病与非暴发性1型糖尿病的临床特征分析

［摘要］　目的　分析暴发性1型糖尿病（FT1DM）的临床特征,提高临床医师对FT1DM的认识。方法　收集2003年10月至2019年12月广西医科大学第九附属医院收治的15例FT1DM患者的临床资料,另选择同期49例非暴发性1型糖尿病（NFT1DM）患者的临床资料进行分析。根据病程、餐后C肽（PCP）、糖化血红蛋白（HbA1c）水平,将NFT1DM患者分为短病程NFT1DM组（25例）、长病程NFT1DM组（24例）;低C肽NFT1DM组（27例）、高C肽NFT1DM组（22例）;低HbA1c NFT1DM组（7例）、高HbA1c NFT1DM组（42例）。对各组间的临床指标进行比较。结果　与NFT1DM组比较,FT1DM组年龄更大,病程更短,HbA1c、空腹C肽（FCP）、PCP水平更低,而血糖、血清肌酐（Scr）、血尿素氮（BUN）、血钾水平更高,差异有统计学意义（P<0.05）。FT1DM组、短病程NFT1DM组和长病程NFT1DM组在年龄、HbA1c、FCP、PCP、Scr、BUN和血钾方面比较差异有统计学意义（P<0.05）。FT1DM组、低C肽NFT1DM组和高C肽NFT1DM组在病程、血糖、HbA1c、FCP、Scr、BUN和血钾方面比较差异有统计学意义（P<0.05）。FT1DM组、低HbA1c NFT1DM组和高HbA1c NFT1DM组在年龄、病程、FCP、PCP、Scr、BUN和血钾方面比较差异有统计学意义（P<0.05）。结论　与NFT1DM相比,FT1DM有其特点。FT1DM的诊断分类值得进一步讨论。