scholarly journals Molecular-genetic, immunological bases and prophylaxis of diabetes mellitus in children

2011 ◽  
Vol 57 (1) ◽  
pp. 9-18
Author(s):  
E V Titovich
Keyword(s):  
Diabetes Mellitus ◽  
Type 1 Diabetes ◽  
Type 1 Diabetes Mellitus ◽  
Molecular Genetic ◽  
Clinical Manifestations ◽  
Russian Population ◽  
Research Centre ◽  
Diabetic Patients ◽  
Genetic Studies

Since the autoimmune nature of type 1 diabetes mellitus came to become known some 40 years ago, continuous investigations have been carried out in an attempt to improve approaches to prognostication of this disease and develop new safe and efficacious methods for its prevention. For all that, many aspects of diabetes pathogenesis still remain far from clear. In most cases (roughly 85%), type 1 diabetes mellitus (DM1) develops sporadically in the absence of a relevant familial or hereditary history of this condition. Accordingly, the first-degree relatives account for only 15% of all DM1 patients. The risk of development of DM1 in the Russian population estimated by the researchers of the Children' Department, Endocrinological Research Centre, is relatively low (0.2%). It depends on many factors, such as the number of ill and healthy relatives, the chronological age of a given patient and the age of onset of clinical manifestations in his (her) relatives. Type 1 diabetes-predisposing and protective haplotypes were identified in the Russian population based on the results of molecular-genetic studies involving 599 children and adolescents with DM1. These and immunological data were used to distinguish between risk groups in the families of diabetic patients and the rationale was proposed for the dynamic follow-up of these subjects. It is concluded that estimation of the risk of type 1 diabetes mellitus based on the results of molecular-genetic studies and monitoring immunological markers constitutes the first step in the elaboration of preventive measures designed to prevent or delay the development of the disease.

ALLERGIC DISEASES IN TYPE 1 DIABETIC PATIENTS: A BRIEF REVIEW

2015 ◽  
Vol 18 (2-3) ◽  
pp. 65-71
Author(s):  
Alina Gabriela Dutu ◽  
◽  
Silviu Albu ◽  
Keyword(s):  
Diabetes Mellitus ◽  
Type 1 Diabetes ◽  
Autoimmune Disease ◽  
Type 1 Diabetes Mellitus ◽  
Allergic Diseases ◽  
Developed Countries ◽  
Diabetic Patients ◽  
Inverse Association ◽  
Stepping Stones

Type 1 diabetes mellitus is considered an autoimmune disease mediated by Th1 lymphocytes, while allergic diseases are characterized by Th2-mediated immune response. Their incidence is rising in developed countries and the interaction between autoimmune and atopic diseases has been a subject of interest for decades. There are many controversies about the association or mutual exclusion of these diseases, but classical paradigm based on the assumption that diseases mediated by Th1 and Th2 should be mutually exclusive, has been revised considering both the role of regulatory T cells Threg, and the environmental factors involved. The aim of this review is to investigate the association of allergic diseases (rhinitis, asthma, dermatitis) in patient diagnosed with type 1 diabetes mellitus. The studies that attempted to shed light on this topic had surprisingly varied results. These ranged from statistically significant proof of an inverse association between an autoimmune disease and one or several atopic ones to other implying positive associations. Although up to now studies on this subject present seemingly discordant results, each attempt raises new questions and sheds light on new factors involved in the interaction of these diseases. They present much needed stepping stones for future studies to learn from and adapt.

Association between urinary N-acetyl-beta-glucosaminidase and its isoenzyme patterns and microangiopathy in type 1 diabetes mellitus

1991 ◽  
Vol 37 (10) ◽  
pp. 1696-1699 ◽  
Author(s):  
C D Agardh ◽  
E Agardh ◽  
A Isaksson ◽  
B Hultberg
Keyword(s):  
Diabetes Mellitus ◽  
Type 1 Diabetes ◽  
Type 1 Diabetes Mellitus ◽  
Metabolic Control ◽  
Isoenzyme Pattern ◽  
Diabetic Patients ◽  
Type 1 Diabetic Patients ◽  
Isoenzyme Patterns ◽  
Apparently Healthy

Abstract Urinary N-acetyl-beta-glucosaminidase (NAG) and its isoenzymes (NAG A and NAG B) in samples from 87 type 1 diabetic patients and 40 apparently healthy reference subjects were studied with enzyme immunoassays. The diabetic patients had higher concentrations of urinary NAG than did the control subjects (P less than 0.01), but the isoenzyme pattern did not differ. There was a positive correlation between metabolic control (Hb A1c concentrations) and total NAG (P less than 0.01), NAG A (P less than 0.01), and NAG B (P less than 0.001). The diabetic patients were divided into three groups, depending on the degree of retinopathy. Subjects with severe forms of retinopathy did not have increased concentrations of urinary NAG unless they had concomitant nephropathy. The isoenzyme pattern was similar irrespective of degree of retinopathy or nephropathy. The results indicate that concentrations of urinary NAG are positively correlated to the degree of nephropathy, whereas there is no such correlation to the degree of retinopathy.

scholarly journals MECHANISMS IN ENDOCRINOLOGY: Seizures and type 1 diabetes mellitus: current state of knowledge

2012 ◽  
Vol 167 (6) ◽  
pp. 749-758 ◽  
Author(s):  
Alberto Verrotti ◽  
Alessandra Scaparrotta ◽  
Cristina Olivieri ◽  
Francesco Chiarelli
Keyword(s):  
Diabetes Mellitus ◽  
Type 1 Diabetes ◽  
Type 1 Diabetes Mellitus ◽  
Neurological Diseases ◽  
Underlying Mechanism ◽  
Acid Decarboxylase ◽  
Diabetic Patients ◽  
Current State ◽  
Metabolic Conditions

In this review, we will try to analyze the possible coexistence between epilepsy or seizures and type 1 diabetes mellitus (T1DM), in order to establish if there is more than a casual association, and to investigate possible mechanisms underlying this link. Anti-glutamic acid decarboxylase antibodies (GAD-Abs) have been associated with T1DM and a great number of neurological diseases such as epilepsy. Epilepsy can be a feature of a large variety of autoimmune or inflammatory disorders. GAD-Abs can have a role at the basis of the possible link between epilepsy and T1DM, although their real pathogenetic mechanism in neurological diseases is still unknown. Metabolic conditions such as hypoglycemia and hyperglycemia, common problems in diabetic patients, may be also implicated, even if their underlying mechanism is minimally understood.

scholarly journals Autoantibodies to thyroid peroxidase in patients with type 1 diabetes in Taiwan

1998 ◽  
pp. 44-48 ◽  
Author(s):  
CC Chang ◽  
CN Huang ◽  
LM Chuang
Keyword(s):  
Diabetes Mellitus ◽  
Type 1 Diabetes ◽  
Type 1 Diabetes Mellitus ◽  
Thyroid Autoimmunity ◽  
Strong Association ◽  
Thyroid Peroxidase ◽  
Diabetic Patients ◽  
Significant Difference ◽  
Type 1 Diabetic Patients

OBJECTIVE: Type 1 diabetes mellitus is frequently associated with autoimmune thyroid disease (ATD). Genetic susceptibility to autoantibody formation in association with ATD and type 1 diabetes mellitus has been described with varying frequencies, but there is still debate about the situation in the Chinese population. We have, therefore, investigated the prevalence of anti-thyroid peroxidase (anti-TPO) in type 1 diabetic patients, and compared the effect of anti-glutamate decarboxylase (anti-GAD) on the thyroid autoimmunity in patients with type 1 diabetes mellitus in Taiwan. SUBJECTS AND METHODS: Two hundred and forty-three subjects with type 1 diabetes mellitus and seventy unrelated normal controls were recruited for the detection of anti-TPO. Two hundred and seventeen sera from two hundred and forty-three type 1 diabetic patients were tested for anti-GAD. RIA and immunoprecipitation were used for anti-TPO and anti-GAD detection respectively. RESULTS: The intra-assay and interassay coefficients of variation of anti-TPO detected by the RIA method ranged from 5.5% to 11.1%. Among 243 type 1 diabetic patients, 53 (21.8%) were positive for anti-TPO. Compared with those without thyroid autoimmunity, there was a female preponderance for the type 1 diabetic patients with thyroid autoimmunity (female:male, 99:91 vs 37:16 respectively). Among the type 1 diabetic patients with thyroid autoimmunity, anti-TPO tended to occur in those of older age or with long-standing disease. The frequency of anti-GAD was 45.6%, (99 of 217), without gender preponderance (males:females, 18.0% vs 27.61%). Compared with those with negative anti-GAD, no significant difference of anti-TPO positivity for the type 1 diabetic patients with positive anti-GAD was found. CONCLUSION: Our data indicated that the RIA method for anti-TPO detection is sensitive and precise for routine clinical use. The presence of anti-TPO in 21.8% of our type 1 diabetic patients confirmed the strong association of ATD and type 1 diabetes mellitus without ethnic differences. The absence of correlation between anti-TPO and anti-GAD in our type 1 diabetic patients suggested genetic heterogeneity in the role of autoimmunity of type 1 diabetes mellitus and ATD among races.

scholarly journals Association of the CCR5 gene with type 1 diabetes mellitus

2013 ◽  
Vol 59 (2) ◽  
pp. 3-6
Author(s):  
O I Kopylova ◽  
T L Kuraeva ◽  
E Iu Lavrikova ◽  
E V Titovich ◽  
A G Nikitin ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Type 1 Diabetes ◽  
Type 1 Diabetes Mellitus ◽  
Healthy Subjects ◽  
Significant Rise ◽  
Diabetic Patients ◽  
Ccr5 Gene ◽  
Base Pair Deletion ◽  
Time Amplification

Aim of the study. To elucidate the association between the polymorphous marker A/del132 of the CCR5 gene with type 1 diabetes mellitus. Materials and methods. The study included 177 patients with type 1 diabetes mellitus (DM1) and 408 healthy subjects (ethnic Russians). CR5 alleles and genotypes were identified with the use of the real-time amplification technique. Results. It was shown that the CCR5 allele without 32 base pair deletion (allele A) predominated in both diabetic patients and diabetes-free subjects. The difference between their occurrence in the two groups was insignificant. At the same time, we documented a significant rise in the frequency of del132/del132 genotype in the diabetic patients compared with the healthy subjects (p=0.008). It is concluded that carriers of the CCR5-del32/del32 genotype in the Russian population of Moscow are at high risk of developing type 1 diabetes mellitus.

scholarly journals The prevalence of type 1 diabetes mellitus among adolescents and adults in Lithuania during 1991–2004

Medicina ◽  
2007 ◽  
Vol 43 (3) ◽  
pp. 242 ◽  
Author(s):  
Rytas Ostrauskas
Keyword(s):  
Diabetes Mellitus ◽  
Type 1 Diabetes ◽  
Type 1 Diabetes Mellitus ◽  
Age Groups ◽  
Diabetic Patients ◽  
Female Age ◽  
Adolescents And Adults ◽  
The Mean ◽  
Type 1 Diabetic Patients

Objective. The goal of this study was to summarize the data on the prevalence of type 1 diabetes mellitus among Lithuanian population aged more than 15 years. Material and methods. The data on patients aged more than 16 years were collected with the help of general practitioners, endocrinologists, and physicians-internists working in the diabetes care in all towns and regions of Lithuania. The data on patients aged 14 to 16 years were obtained from the National Register of Diabetes Mellitus in Childhood in Lithuania. Results. In Lithuania, on December 31, 1991, there were 2179 adolescent and adult patients with type 1 diabetes mellitus or 75.21 per 100 000 inhabitants of the same age group (95% Poisson CI 72.12–78.43), and at the end of 2004 – 3996 or 140.69 (95% Poisson CI 136.40– 145.12), respectively. During a 14-year period, the mean increase in the number of type 1 diabetic patients was 144.85±23.32 persons per year or 4.66±1.17% or 4.04±1.19 cases per 100 000 population (for males 85.54±10.82 or 5.06±1.02% or 6.81±1.57/100 000 and for females 54.23±9.05 or 3.93±0.86% or 3.56±1.05/100 000). Regression-based linear trends showed that the prevalence of type 1 diabetes mellitus among population aged more than 15 years had a tendency to increase. The prevalence rates of type 1 diabetes mellitus among adolescent and adult subjects, adjusted for Lithuanian male and female age groups, were 80.64/100 000 and 70.23/100 000 in 1991 (P<0.05) and 166.52 and 117.63 in 2004 (P<0.05), respectively. Conclusions. The prevalence of type 1 diabetes mellitus among Lithuanian females aged more than 15 years was lower than among males. The register provides the possibility of highly precise collection of the data on patients from various medical care units in Lithuania.

scholarly journals Electrophysiological Characterization of Neuropathy Complicating Type 1 Diabetes Mellitus

2019 ◽  
Vol 2019 ◽  
pp. 1-6
Author(s):  
Nimat Abuelwafaa ◽  
Hana Ahmed ◽  
Ilham Omer ◽  
Mohamed Abdullah ◽  
Ammar Ahmed ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Type 1 Diabetes ◽  
Peripheral Neuropathy ◽  
Type 1 Diabetes Mellitus ◽  
Conduction Velocity ◽  
Lower Limb ◽  
Diabetic Patients ◽  
Nerve Involvement ◽  
The Common

Diabetic peripheral neuropathy (DPN) involves sensory and motor nerves, resulting in demyelination as well as axonal degeneration. This study was conducted to describe the pattern of lower limb nerve involvement in children with type 1 diabetes mellitus (DM) based on the parameters of nerve conduction study (NCS). This cross-sectional study recruited 50 children with type 1 DM having mean disease duration of 4.92±3.84 years who attended the referred clinic in Sudan Childhood Diabetes Center. Their mean age was 15.00±2.19 years, 42% were males, and 58% were females. Twenty six matched healthy control subjects were involved; their mean age was 13.88±2.46 years, 38.46% were males, and 61.54% were females. Bilateral NCS of the sensory and motor lower limb nerves was performed using Medelec Synergy machine. Interpretation of the patients’ results was based on our own control reference values. Data was analysed using IBM SPSS statistics. Out of the 50 diabetic patients, 44 (88%) had electrophysiological evidence of peripheral neuropathy (abnormalities in at least two of the electrophysiological parameters). The majority (68.2%) had motor involvement and 31.8% had sensorimotor, while none of them (0%) had pure sensory involvement. Regarding abnormal NCS parameters (conduction velocity vs. amplitude of the compound action potential), conduction slowing feature predominated in 61.4% and only few (6.8%) showed amplitude reduction, while 31.8% showed mixed features. The most frequently affected nerve was the common peroneal, followed by posterior tibial, and the least was the sural nerve. The most sensitive parameter was the common peroneal conduction velocity. Motor precedes sensory nerve involvement. The most frequent neurophysiological abnormality was the conduction slowing, and the common peroneal was the most vulnerable nerve. These findings signify generation of a protocol for early screening of neuropathy in children with type 1 diabetes.

scholarly journals Circulating endothelial cells are elevated in patients with type 1 diabetes mellitus

2010 ◽  
Vol 162 (4) ◽  
pp. 711-717 ◽  
Author(s):  
Ebru Asicioglu ◽  
Dilek Gogas Yavuz ◽  
Mehmet Koc ◽  
Beste Ozben ◽  
Dilek Yazici ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Endothelial Cells ◽  
Type 1 Diabetes ◽  
Type 1 Diabetes Mellitus ◽  
Vascular Damage ◽  
Circulating Endothelial Cells ◽  
Diabetic Patients ◽  
Activity Levels ◽  
Type 2 Diabetic Patients

ObjectiveCirculating endothelial cells (CECs) have emerged as vascular damage markers and are increased in type 2 diabetic patients. Since type 1 diabetes is associated with vascular damage, we hypothesized high CEC numbers in this patient population.MethodsThirty-nine patients with type 1 diabetes and 39 controls were included. CECs were isolated using anti-CD146-coated Dynabeads, stained with Ulex lectin-1, and counted by fluorescence microscopy. Endothelial function was measured as flow-mediated dilation (FMD). Thiobarbituric acid reactive substances (TBARS), total glutathione levels (GSH), and paraoxonase (PON) activity levels were measured as oxidative stress markers.ResultsPatients with type 1 diabetes mellitus had higher number of CECs (7.46±5.37 vs 2.13±1.13 cells/ml,P<0.001), lower FMD (7.87±2.19 vs 12.06±2.34%,P<0.001), higher TBARS (4.94±1.20 vs 3.07±0.75 nmol/MDA,P<0.001), lower GSH (206.12±98.06 vs 353.61±68.45 μM,P<0.001), and lower PON activity levels (89.10±17.82 vs 127.65±29.01 U/l,P<0.001) as compared to controls.There was positive correlation between CEC numbers and HbAlc levels (r=0.49,P=0.002). CECs and fasting glucose levels were not correlated. There was no correlation between the number of CECs and FMD. Furthermore, there were no correlations between the number of CECs and TBARS, GSH and PON activity levels. Multiple regression analysis showed that HbAlc levels (r2=0.40,P<0.009) were associated with CEC numbers.ConclusionCECs are elevated in patients with type 1 diabetes mellitus reflecting endothelial damage. This increase is dependent on long-term glucose control.

Sign in / Sign up

Export Citation Format

Share Document