scholarly journals Autoantibodies in Diabetes Mellitus

2017 ◽  
Vol 1 (2) ◽  
pp. 58
Author(s):  
Eka Herawati ◽  
Ardian Susanto ◽  
Christina Noventy Sihombing
Keyword(s):  
Diabetes Mellitus ◽  
Autoimmune Diabetes ◽  
Cost Effective ◽  
Acid Decarboxylase ◽  
Low Grade ◽  
Tissue Destruction ◽  
Islet Antigen ◽  
Low Grade Inflammation

Based on American Diabetes Association (ADA), diabetes can be classified into the following general categories: type 1 diabetes (T1D), type 2 diabetes (T2D), gestational diabetes mellitus (GDM) and specific types of diabetes due to other cause. Obesity is by far the main underlying factor causing T2D and its pathological potential lies in obesity-associated insulin resistance, activation of innate immunity and chronic low-grade inflammation. When tissue inflammation induced, tissue destruction occurs, 'self' antigens, which are generally not accessible to T cells, can be released from the affected tissues and promote autoimmune activation. The 4 major autoantibodies are islet-cell cytoplasmic autoantibodies (ICA), glutamid acid decarboxylase antibody (GADA), islet antigen-2 antibody (IA-2A) and insulin autoantibodies (IAA). In addition, ZnT8A has recently been found to predict T1D. ZnT8 is contained in the islets of Langerhans, with the highest expression is in β cells of the pancreas. ZnT8A measurements simultaneously with GADA, IA-2A and IAA achieve rates of 98% detection for onset level of autoimmune diabetes. Presence of antibodies in T2D also shows the potential serious complications compared with T2D without antibodies. The combination of GADA, IA-2A and ZnT8A can be suggested as the most powerful and cost-effective diagnostic approach in patients with T1D.Keywords: autoantibody, autoimmune, diabetes mellitus, ICA, GADA, IA-2A, IAA, ZnT8A

scholarly journals Prevalence of risk factors of cardiometabolic complications in latent autoimmune diabetes in adults

2021 ◽  
Vol 25 (2(98)) ◽  
pp. 125-129
Author(s):  
I. Tsaryk ◽  
N. Pashkovska ◽  
O. Ilashchuk
Keyword(s):  
Diabetes Mellitus ◽  
Risk Factors ◽  
Metabolic Syndrome ◽  
Clinical Laboratory ◽  
Autoimmune Diabetes ◽  
Acid Decarboxylase ◽  
Latent Autoimmune Diabetes ◽  
Patients With Diabetes

The aim of the study. To determine the prevalence of risk factors for cardiometabolic complications in latent autoimmune diabetes in adults compared to other types of diabetes depending on the phenotype of the disease.Materials and methods. A comprehensive examination of 106 patients with diabetes mellitus: 45 (main group) with latent autoimmune diabetes in adults (LADA), 26 - with type 1 diabetes mellitus (T1DM), 35 - with type 2 diabetes mellitus (T2DM). Complaints, anamnesis data, objective examination, results of general clinical, laboratory researches, indicators of carbohydrate metabolism, titers of antibodies to glutamic acid decarboxylase were evaluated.Results. The prevalence of metabolic syndrome (MS) in LADA was 51% and was significantly higher than in T1DM (19%), but was lower compared with T2DM (94%). The highest incidence of MS was found in patients with the LADA2 phenotype (87%). Of particular note is the fact that this figure was close to that in T2DM. At the same time in LADA1 the incidence of MS was lower (36%), but twice as high as in T1DM. In addition to hyperglycemia, abdominal obesity (62% of patients), hypertension (78%) and dyslipidemia (56%) were commonly reported in LADA.Conclusions. The prevalence of metabolic syndrome as a complex of cardiometabolic risk factors in LADA differs from that in classical types of diabetes, which requires a differential approach to their management.

scholarly journals The Role of MIF in Type 1 and Type 2 Diabetes Mellitus

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Yuriko I. Sánchez-Zamora ◽  
Miriam Rodriguez-Sosa
Keyword(s):  
Diabetes Mellitus ◽  
Macrophage Migration Inhibitory Factor ◽  
Inflammatory Responses ◽  
Current Knowledge ◽  
Low Grade ◽  
Clinical Environment ◽  
Low Grade Inflammation

Autoimmunity and chronic low-grade inflammation are hallmarks of diabetes mellitus type one (T1DM) and type two (T2DM), respectively. Both processes are orchestrated by inflammatory cytokines, including the macrophage migration inhibitory factor (MIF). To date, MIF has been implicated in both types of diabetes; therefore, understanding the role of MIF could affect our understanding of the autoimmune or inflammatory responses that influence diabetic pathology. This review highlights our current knowledge about the involvement of MIF in both types of diabetes in the clinical environment and in experimental disease models.

Latent autoimmune diabetes of adults (LADA): The informative value of autoantibodies

2016 ◽  
Vol 88 (10) ◽  
pp. 42-45 ◽  
Author(s):  
Yu V Silko ◽  
T V Nikonova ◽  
O N Ivanova ◽  
S M Stepanova ◽  
M V Shestakova ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Islet Cell ◽  
Autoimmune Diabetes ◽  
Acid Decarboxylase ◽  
Latent Autoimmune Diabetes ◽  
Immunological Examination ◽  
The Russian Federation ◽  
Islet Antigen

Aim. To investigate the prevalence of autoantibodies (autoAbs) associated with the development of type 1 diabetes mellitus (T1DM) in latent autoimmune diabetes of adults (LADA) in the Russian Federation. Subjects and methods. A total of 96 patients (46 women and 50 men) with LADA were examined. All the patients underwent an immunological examination including the determination of autoAbs, such as glutamic acid decarboxylase autoAbs (GADA), islet antigen-2 auto-Abs (IA-2A), islet cell cytoplasmic auto-Abs (ICA), zinc transporter 8 auto-Abs (ZnT8A), and insulin auto-Abs (IAA). Results. GADAs were found in 61.5% of the examinees. ICAs were detected in 24%, IA-2As were observed in 57.3%. AutoAbs were more frequently observed in combination than alone. IAAs were least commonly seen in 8.3% and only in combinations. ZnT8As were found in 52.1% of the examinees and they were present alone in 5.2%. Conclusion. The antibodies that are most frequently observed in LADA are GADAs, IA-2As and ZnT8As. It is insufficient to identify only GADAs, as the latter are found in only 61.5% of the patients. IA-2As and ZnT8As, which are present in 57.3% and 52.1% of the patients, respectively, should also be used in the diagnosis of LADA. ICAs are much less commonly seen and along with IAAs may be additional markers for LADA.

Type 1 Diabetes-related Autoantibodies in Different Forms of Diabetes

2019 ◽  
Vol 15 (3) ◽  
pp. 199-204 ◽  
Author(s):  
Elin Pettersen Sørgjerd
Keyword(s):  
Type 2 Diabetes ◽  
Type 1 Diabetes ◽  
Autoimmune Diabetes ◽  
Acid Decarboxylase ◽  
Adult Onset ◽  
Latent Autoimmune Diabetes ◽  
Childhood Type 1 Diabetes ◽  
Childhood Type

Autoantibodies against Glutamic Acid Decarboxylase (GADA), insulinoma antigen-2 (IA- 2A), insulin (IAA) and the most recently Zinc Transporter 8 (ZnT8A) are one of the most reliable biomarkers for autoimmune diabetes in both children and adults. They are today the only biomarkers that can distinguish Latent Autoimmune Diabetes in Adults (LADA) from phenotypically type 2 diabetes. As the frequency of autoantibodies at diagnosis in childhood type 1 diabetes depends on age, GADA is by far the most common in adult onset autoimmune diabetes, especially LADA. Being multiple autoantibody positive have also shown to be more common in childhood diabetes compared to adult onset diabetes, and multiple autoantibody positivity have a high predictive value of childhood type 1 diabetes. Autoantibodies have shown inconsistent results to predict diabetes in adults. Levels of autoantibodies are reported to cause heterogeneity in LADA. Reports indicate that individuals with high levels of autoantibodies have a more type 1 diabetes like phenotype and individuals with low levels of autoantibody positivity have a more type 2 diabetes like phenotype. It is also well known that autoantibody levels can fluctuate and transient autoantibody positivity in adult onset autoimmune diabetes have been reported to affect the phenotype.

scholarly journals Fusion Proteins for Combined Analysis of Autoantibodies to the 65-kDa Isoform of Glutamic Acid Decarboxylase and Islet Antigen-2 in Insulin-dependent Diabetes Mellitus

2001 ◽  
Vol 47 (5) ◽  
pp. 926-934 ◽  
Author(s):  
Mathias Rickert ◽  
Jochen Seissler ◽  
Werner Dangel ◽  
Helga Lorenz ◽  
Wiltrud Richter
Keyword(s):  
Diabetes Mellitus ◽  
Fusion Protein ◽  
Cost Effective ◽  
Insulin Dependent Diabetes Mellitus ◽  
Insulin Dependent Diabetes ◽  
Dependent Diabetes Mellitus ◽  
Acid Decarboxylase ◽  
Immune Reactivity ◽  
Insulin Dependent ◽  
Islet Antigen

Abstract Background: Prediction, risk assessment, and diagnosis of autoimmune diseases often rely on detection of autoantibodies directed to multiple target antigens, such as the 65-kDa isoform of glutamic acid decarboxylase (GAD65-abs) and the tyrosine phosphatase-like protein islet antigen-2 (IA2-abs), the two major subspecificities of islet cell antibodies (ICAs) associated with insulin-dependent diabetes mellitus. We hypothesized that a combination of autoantigens in a fusion protein unifying the important immunodominant epitopes could provide an efficient target for cost-effective, one-step screening of sera. Methods: Chimeric proteins composed of GAD65 and IA2 residues were constructed, analyzed for their immune reactivity with monoclonal antibodies and sera, and used in a diagnostic assay with 35S-labeled protein as antigen. Results: Length and order of GAD65 and IA2 sequences were critical for conservation of the conformational epitopes in the fusion protein. Among four chimera tested, only IA2(606–979)/GAD65(1–585) retained wild-type-like folding of GAD65 and IA2 domains and yielded a stable protein after baculovirus expression. Reactivity of GAD65 antibody- and IA2 antibody-positive sera from patients newly diagnosed with insulin-dependent diabetes mellitus, from ICA-positive prediabetics, and from ICA-positive first-degree relatives demonstrated conservation of the relevant autoreactive epitopes. The assay based on the in vitro translated fusion antigen had a sensitivity and specificity identical to those for detection of GAD65- and IA2-abs based on the two separate GAD65 and IA2 proteins. Conclusions: Autoantigens such as GAD65 and IA2 can be combined successfully in a fusion protein of similar immune reactivity. This allows simultaneous detection of GAD65- and IA2-abs in a one-step screening assay and cost-effective identification of positive individuals at risk of diabetes or at onset of disease.

Metabolic Syndrome and Its Effect on the Brain: Possible Mechanism

2018 ◽  
Vol 17 (8) ◽  
pp. 595-603 ◽  
Author(s):  
Nurul ‘Ain Arshad ◽  
Teoh Seong Lin ◽  
Mohamad Fairuz Yahaya
Keyword(s):  
Diabetes Mellitus ◽  
Metabolic Syndrome ◽  
Neurodegenerative Diseases ◽  
Disease Type ◽  
Low Grade ◽  
Oxygen Species ◽  
Metabolic Factors ◽  
Low Grade Inflammation ◽  
The Brain

Background & Objective: Metabolic syndrome (MetS) is an interconnected group of physiological, biochemical, clinical and metabolic factors that directly increase the risk of cardiovascular disease, type 2 diabetes mellitus (T2DM) and mortality. Rising evidence suggests that MetS plays a significant role in the progression of Alzheimer’s disease and other neurodegenerative diseases. Nonetheless, the factors linking this association has not yet been elucidated. As we are facing an increasing incidence of obesity and T2DM in all stages of life, understanding the association of MetS and neurodegenerative diseases is crucial to lessen the burden of the disease. Conclusion: In this review, we will discuss the possible mechanisms which may relate the association between MetS and cognitive decline which include vascular damages, elevation of reactive oxygen species (ROS), insulin resistance and low-grade inflammation.

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