Kinetics of sodium-lithium countertransport activity in patients with uncomplicated type I diabetes

1992 ◽  
Vol 82 (3) ◽  
pp. 291-299 ◽  
Author(s):  
Peter A. Rutherford ◽  
Trevor H. Thomas ◽  
Susan J. Carr ◽  
Roy Taylor ◽  
Robert Wllklnson
Keyword(s):  
Type 1 Diabetes ◽  
Essential Hypertension ◽  
Type I Diabetes ◽  
Plasma Lipid ◽  
Maximum Velocity ◽  
Diabetic Patients ◽  
Type I ◽  
High Sodium ◽  
Type 1 Diabetic Patients

1. Increased erythrocyte sodium-lithium countertransport activity has been reported to be associated with nephropathy in type 1 diabetes and linked to a family history of essential hypertension. 2. This study aimed to determine the mechanism of increased sodium-lithium countertransport activity. Sodium-lithium countertransport kinetics were measured in uncomplicated and hyperlipidaemic type 1 diabetic patients. 3. In the nine out of 31 uncomplicated type 1 diabetic patients who had high sodium-lithium countertransport activity, the sodium affinity (Km) was normal but the maximum velocity (Vmax.) was increased. 4. Hyperlipidaemia, when present in diabetic patients, was associated with increased sodium-lithium countertransport activity, but could not explain the high activity in uncomplicated type 1 diabetic patients in whom plasma lipid concentrations were normal. 5. Sodium-lithium countertransport activity is increased in type 1 diabetes by a mechanism different to that in essential hypertension, where the mechanism is a low Km (increased sodium affinity). Hence familial hypertension cannot explain the raised sodium-lithium countertransport activity in type 1 diabetes.

HLA-DQB1 Subtypes Predict Diabetic Retinopathy in Patients with Type I Diabetes Mellitus

2009 ◽  
Vol 19 (4) ◽  
pp. 638-645 ◽  
Author(s):  
Mohammad Hassan Khazaee ◽  
Jalil Tavakol Afshari ◽  
Bahram Khazaee ◽  
Ramin Daneshvar ◽  
Javad Akbarzadeh ◽  
...  
Keyword(s):  
Diabetic Retinopathy ◽  
Type I Diabetes ◽  
Disease Onset ◽  
Human Leukocyte ◽  
Hla Typing ◽  
Diabetic Patients ◽  
Type I ◽  
Study Type ◽  
Type 1 Diabetic Patients

Purpose To investigate if diabetic patients without diabetic retinopathy despite long disease duration have different human leukocyte antigen (HLA) status vs those with an early onset of retinopathy. Methods Retrospective, nonrandomized, masked comparative study. Type 1 diabetic patients with a disease onset before age 30 were recruited to the study. The study population consisted of two groups of diabetic patients: those with normal retinopathy course (retinopathy developed during the first 20 years of diabetes onset) (23 patients) and those with postponed retinopathy (no obvious retinopathy in spite of passing 20 years of diabetes) (19 patients). These groups were matched with regard to level of glycemic control, blood pressure, and lipid profile. A group of 23 healthy patients served as controls. HLA-DQB1 typing of blood samples was done using a polymerase chain reaction with sequence-specific primer (PCR-SSP) method. Results HLA-DQB1*0201/HLA-DQB1*0501 and HLA-DQB1*0201/HLA-DQB1*0504 haplotypes were more common among type 1 diabetic patients with normal retinopathy course than those with postponed retinopathy (26.1% vs 0.0%; p=0.019). HLA-DQB1*0301 and HLA-DQB1*0304 were less common among those diabetic patients with normal retinopathy course than those with a postponed retinopathy (63.2% vs 34.8%; p=0.067). Conclusions Some haplotypes seem to predispose diabetic patients to diabetic retinopathy. HLA typing may be beneficial for predicting the prognosis of diabetic retinopathy in younger diabetic patients.

scholarly journals Nigella Sativa (Ns) Could it be a New Remedy for Type 1 Diabetic Patients

2018 ◽  
Vol 3 (3) ◽  
Keyword(s):  
Type I Diabetes ◽  
Nigella Sativa ◽  
Fasting Blood Glucose ◽  
Diabetic Patients ◽  
Type I ◽  
Mortality And Morbidity ◽  
Regular Treatment ◽  
Wide Range ◽  
Type 1 Diabetic Patients

Nigella sativa (NS) is a widely used medicinal plant throughout the world. Seeds and oil have a long history of folklore usage in various aspects of medicines and food. It has been used to treat a wide range of diseases including diabetes mellitus (DM). DM is a chronic incurable disease with high mortality and morbidity and increasing prevalence. The aim of this study was to investigate the hypoglycemic effect of (NS) in type 1 diabetic patients. 30 patients with type I diabetes aged 5 to 17 years were included in the study after consenting their parents. Their medical history was taken to confirm that they were fit in the last month and their FBG was measured. They were given NS (2gm per day) with yogurt, beside their regular treatment (insulin) without changing their dose or diet for 30 days. Fasting blood glucose (FBG) was rechecked after that and compared with the initial FBG paired t-test in Statistical Package for the Social Sciences (SPSS) 22 software. The mean levels of FBS before and one month after the intervention were 259 ± 102 and 134 ± 70 mg/dl respectively. There was significant reduction in FBS after treatment with NS (P =0.000). In conclusion NS, a natural product, showed a significant improvement in FBG in type 1 diabetic patients. More studies are recommended in the future to determine the optimal dose, duration and frequency of NS as an antidiabetic drug, its mechanism of action in type1 diabetes and to search for the active antidiabetic ingredient as well as to study the effect of NS in prevention of diabetic complications.

Cardiac responses to insulin-induced hypoglycemia in nondiabetic and intensively treated type 1 diabetic patients

2001 ◽  
Vol 281 (5) ◽  
pp. E1029-E1036 ◽  
Author(s):  
Raymond R. Russell ◽  
Deborah Chyun ◽  
Steven Song ◽  
Robert S. Sherwin ◽  
William V. Tamborlane ◽  
...  
Keyword(s):  
Type 1 Diabetes ◽  
Radionuclide Angiography ◽  
Left Ventricular ◽  
Cardiac Response ◽  
Left Ventricular Ejection ◽  
Diabetic Patients ◽  
Plasma Catecholamine ◽  
Ventricular Ejection Fraction ◽  
Type 1 Diabetic Patients

Insulin-induced hypoglycemia occurs commonly in intensively treated patients with type 1 diabetes, but the cardiovascular consequences of hypoglycemia in these patients are not known. We studied left ventricular systolic [left ventricular ejection fraction (LVEF)] and diastolic [peak filling rate (PFR)] function by equilibrium radionuclide angiography during insulin infusion (12 pmol · kg−1 · min−1) under either hypoglycemic (∼2.8 mmol/l) or euglycemic (∼5 mmol/l) conditions in intensively treated patients with type 1 diabetes and healthy nondiabetic subjects ( n = 9 for each). During hypoglycemic hyperinsulinemia, there were significant increases in LVEF (ΔLVEF = 11 ± 2%) and PFR [ΔPFR = 0.88 ± 0.18 end diastolic volume (EDV)/s] in diabetic subjects as well as in the nondiabetic group (ΔLVEF = 13 ± 2%; ΔPFR = 0.79 ± 0.17 EDV/s). The increases in LVEF and PFR were comparable overall but occurred earlier in the nondiabetic group. A blunted increase in plasma catecholamine, cortisol, and glucagon concentrations occurred in response to hypoglycemia in the diabetic subjects. During euglycemic hyperinsulinemia, LVEF also increased in both the diabetic (ΔLVEF = 7 ± 1%) and nondiabetic (ΔLVEF = 4 ± 2%) groups, but PFR increased only in the diabetic group. In the comparison of the responses to hypoglycemic and euglycemic hyperinsulinemia, only the nondiabetic group had greater augmentation of LVEF, PFR, and cardiac output in the hypoglycemic study ( P < 0.05 for each). Thus intensively treated type 1 diabetic patients demonstrate delayed augmentation of ventricular function during moderate insulin-induced hypoglycemia. Although diabetic subjects have a more pronounced cardiac response to hyperinsulinemia per se than nondiabetic subjects, their response to hypoglycemia is blunted.

Plasma lipid levels and nutritional intake in childhood- and adolescence-onset young type 1 diabetic patients in Japan

2006 ◽  
Vol 73 (1) ◽  
pp. 29-34 ◽  
Author(s):  
Mieko Saito ◽  
Hiromi Kuratsune ◽  
Hayami Nitta ◽  
Kazue Kawahara ◽  
Masahiro Hamano ◽  
...  
Keyword(s):  
Plasma Lipid ◽  
Nutritional Intake ◽  
Diabetic Patients ◽  
Childhood And Adolescence ◽  
Lipid Levels ◽  
Type 1 Diabetic Patients

scholarly journals Mitochondrial Alterations and Enhanced Human Leukocyte/Endothelial Cell Interactions in Type 1 Diabetes

2020 ◽  
Vol 9 (7) ◽  
pp. 2155
Author(s):  
Francesca Iannantuoni ◽  
Aranzazu M. de Marañon ◽  
Zaida Abad-Jiménez ◽  
Francisco Canet ◽  
Pedro Díaz-Pozo ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Type 1 Diabetes ◽  
Adhesion Molecules ◽  
Mitochondrial Function ◽  
Mitochondrial Membrane ◽  
Diabetic Patients ◽  
Ros Production ◽  
Mitochondrial Ros ◽  
Type 1 Diabetic Patients

Type 1 diabetes has been associated with oxidative stress. This study evaluates the rates of oxidative stress, mitochondrial function, leukocyte–endothelium interactions and adhesion molecules in type 1 diabetic patients. The study population consisted of 52 diabetic patients and 46 body-composition and age-matched controls. We assessed anthropometric and metabolic parameters, oxidative stress and mitochondrial function by evaluating reactive oxygen species (ROS) production, mitochondrial ROS production, mitochondrial membrane potential and superoxide dismutase (SOD) and catalase (CAT) expression in polymorphonuclear leukocytes from type 1 diabetic patients. In addition, we evaluated interactions between leukocytes and human umbilical vein endothelial cells (HUVEC), and serum expression of adhesion molecules (P-selectin, VCAM-1 and ICAM-1), proinflammatory cytokines (IL-6 and TNFα) and myeloperoxidase (MPO). HbA1C and glucose levels were higher in diabetic patients than in control subjects, as expected. Mitochondrial function was altered and leukocyte–endothelium interactions were enhanced in diabetic patients, which was evident in the increase in total and mitochondrial ROS production, higher mitochondrial membrane potential, enhanced leukocyte rolling and adhesion, and decreased rolling velocity. Furthermore, we observed an increase in levels of adhesion molecules P-selectin, VCAM-1, and ICAM-1 in these subjects. In addition, type 1 diabetic patients exhibited an increase in proinflammatory mediators TNFα and MPO, and a decreased expression of SOD. The enhancement of leukocyte–endothelium interactions and proinflammatory markers correlated with glucose and HbA1Clevels. Mitochondrial alteration, oxidative stress, and enhanced leukocyte–endothelium interactions are features of type 1 diabetes and may be related to cardiovascular implications.

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 Health related quality of life among children with Type I diabetes, Assiut city, Egypt

2017 ◽  
Vol 7 (10) ◽  
pp. 73 ◽  
Author(s):  
Marzoka A. Gadallah ◽  
Taghreed Abdul-Aziz M. Ismail ◽  
Naglaa Saad Abdel Aty
Keyword(s):  
Quality Of Life ◽  
Type 1 Diabetes ◽  
Health Insurance ◽  
Type I Diabetes ◽  
Type I ◽  
Health Related Quality ◽  
Related Quality ◽  
Health Related

Objective: Health related quality of life (HRQOL) is a multidimensional construct that includes physical and psychosocial functioning, has emerged as an important outcome in pediatric population with chronic health conditions. The study objectives are to measure the quality of life among children with type I diabetes compared to healthy peers and to determine factors affecting the QOL among children with type I diabetes.Methods: Analytic cross sectional study was conducted in Sidi Galal health insurance outpatient clinic for children with type 1 diabetes mellitus and a comparison group of healthy peers was taken from other outpatient clinics. A total of four hundred and twelve children, aged from 8-18 years with type 1 diabetes and four hundred and twelve healthy peers matched in age and sex were interviewed. Three tools were used for this study: Demographic questionnaire, Socio-economic scale, and Peds QL4.0 Generic Core Scale was used to measure HRQOL.Results: The mean age of studied children was 12.9 ± 3.2. More than 60% of children with diabetes had uncontrolled glycemic level and 60% of them were in low socio-economic level. Children with diabetes had significantly lower HRQOL than healthy children in all domains. Age, glycemic control status and birth order of the diabetic children showed no significance difference regarding the QOL. Disease duration affected only the emotional function of the QOL and females showed significantly higher score regarding school functioning. Social, school and the total QOL scores were significantly higher among children with highly educated mothers while father's education affected the emotional, school and total QOL scores. Children in the middle and high social class showed significantly higher scores regarding social, school and total QOL. Presence of diabetic parent positively affected the social functioning while had negative effect on the school function of children with type I diabetes.Conclusions and recommendations: Diabetes is negatively affecting all the QOL functioning of the children. We recommend that Integrated programs between child's home, school and health insurance clinics for educating and supporting children with diabetes to improve their HRQOL.

Glycosuria amount in response to hyperglycaemia and risk for diabetic kidney disease and related events in Type 1 diabetic patients

2018 ◽  
Vol 34 (10) ◽  
pp. 1731-1738 ◽  
Author(s):  
Charlyne Carpentier ◽  
Séverine Dubois ◽  
Kamel Mohammedi ◽  
Narimène Belhatem ◽  
Béatrice Bouhanick ◽  
...  
Keyword(s):  
Type 1 Diabetes ◽  
Renal Plasma Flow ◽  
Individual Variability ◽  
Low Risk ◽  
Diabetic Patients ◽  
Risk Patients ◽  
Stage Renal Disease ◽  
End Stage ◽  
Type 1 Diabetic Patients

Abstract Background Hyperglycaemia impairs tubulo-glomerular feedback. We tested whether variable tubulo-glomerular feedback during hyperglycaemia contributes to renal risk heterogeneity seen in Type 1 diabetes. Methods During the period 1990–92, we studied the tubulo-glomerular feedback in Type 1 diabetic patients at high or low renal risk [21 of 54 with glomerular hyperfiltration and/or microalbuminuria against 11 of 55 with normal glomerular filtration rate (GFR) and urinary albumin despite uncontrolled diabetes]. The GFR, effective renal plasma flow, mean arterial pressure and fractional reabsorptions of glucose, osmols, sodium and lithium were measured sequentially during normo- and hyperglycaemia. All patients were followed up until 2016 for incident proteinuria, estimated GFR &lt;60 mL/min/1.73 m2, doubling of serum creatinine, end-stage renal disease or all-cause death. Results Glycaemia increased from 6.1 ± 1.3 to 15.1 ± 1.9 mmol/L in both high-risk and low-risk patients. Glycosuria was lower in the high- versus low-risk patients: 0.34 ± 0.25 versus 0.64 ± 0.44 mmol/min (P = 0.03). Both groups displayed similar kidney function during normoglycaemia. Hyperglycaemia increased more importantly GFR and fractional reabsorptions, and pre-glomerular vasodilatation in the high- than in the low-risk patients (all P &lt; 0.05). Over 21 years, 31.5% high- versus 12.7% low-risk patients developed endpoints (adjusted P = 0.006). In a multi-adjusted survival analysis of patients having undergone renal tests, each 0.10 mmol/min glycosuria during hyperglycaemia reduced the outcome risk by 0.72 (95% confidence interval 0.49–0.97, P = 0.03). Conclusions Reduced tubulo-glomerular feedback and glycosuria during hyperglycaemia indicate high renal risk for Type 1 diabetic patients. Inter-individual variability in tubulo-glomerular feedback activity determines renal risk in Type 1 diabetes.

scholarly journals Plasma osteoprotegerin levels are associated with glycaemic status, systolic blood pressure, kidney function and cardiovascular morbidity in type 1 diabetic patients

2006 ◽  
Vol 154 (1) ◽  
pp. 75-81 ◽  
Author(s):  
Lars Melholt Rasmussen ◽  
Lise Tarnow ◽  
Troels Krarup Hansen ◽  
Hans-Henrik Parving ◽  
Allan Flyvbjerg
Keyword(s):  
Blood Pressure ◽  
Type 1 Diabetes ◽  
Systolic Blood Pressure ◽  
Kidney Function ◽  
Vascular Complications ◽  
Diabetic Patients ◽  
Diabetic Vascular Complications ◽  
Patients With Diabetes ◽  
Type 1 Diabetic Patients

Objective: The bone-related peptide osteoprotegerin (OPG) has recently been found in increased amounts in the vasculature in diabetes. It is produced by vascular smooth muscle and endothelial cells, and may be implicated in the development of vascular calcifications. OPG is present in the circulation, where increased amounts have been observed in patients with diabetes. In this study, we examined whether plasma OPG is associated with the glycaemic and vascular status of patients with type 1 diabetes. Methods: Two gender-, age- and duration-comparable groups of type 1 diabetic patients either with (n = 199) or without (n = 192) signs of diabetic nephropathy were studied. Plasma OPG was determined by an ELISA. Results: The plasma OPG concentration was significantly higher in patients with nephropathy than those without (3.11 (2.49–3.99) vs 2.57 (2.19–3.21) (median (interquartiles), ng/ml), P < 0.001). Plasma OPG correlated with haemoglobin A1c (HbA1c), systolic blood pressure and age in both groups and, in addition, with kidney function in the nephropathic group. These correlations remained significant in multivariate models. In addition, we found that plasma OPG concentrations were increased among patients with cardiovascular diseases (CVD), both in the normoalbuminuric and the nephropathic groups. The differences between nephropathic and normoalbuminuric, as well as subgroups with and without CVD, could largely be ascribed to changes in HbA1c, age, systolic blood pressure and creatinine. Conclusion: OPG is associated with glycaemic control and CVD in patients with type 1 diabetes, compatible with the hypothesis that OPG is associated with the development of diabetic vascular complications.

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.

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