scholarly journals The implications of hyperoxia, type 1 diabetes and sex on cardiovascular physiology in mice

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Katarina Bojkovic ◽  
Jennifer Leigh Rodgers ◽  
Riddhi Vichare ◽  
Asmita Nandi ◽  
Hussein Mansour ◽  
...  
Keyword(s):  
Cardiac Remodeling ◽  
Type I Diabetes ◽  
Comorbid Condition ◽  
Diabetic Patients ◽  
Type I ◽  
Wild Type ◽  
Cardiac Pathophysiology ◽  
Provision Of Care ◽  
Akita Mice

AbstractOxygen supplementation, although a cornerstone of emergency and cardiovascular medicine, often results in hyperoxia, a condition characterized by excessive tissue oxygen which results in adverse cardiac remodeling and subsequent injurious effects to physiological function. Cardiac remodeling is further influenced by various risk factors, including pre-existing conditions and sex. Thus, the purpose of this experiment was to investigate cardiac remodeling in Type I Diabetic (Akita) mice subjected to hyperoxic treatment. Overall, we demonstrated that Akita mice experience distinct challenges from wild type (WT) mice. Specifically, Akita males at both normoxia and hyperoxia showed significant decreases in body and heart weights, prolonged PR, QRS, and QTc intervals, and reduced %EF and %FS at normoxia compared to WT controls. Moreover, Akita males largely resemble female mice (both WT and Akita) with regards to the parameters studied. Finally, statistical analysis revealed hyperoxia to have the greatest influence on cardiac pathophysiology, followed by sex, and finally genotype. Taken together, our data suggest that Type I diabetic patients may have distinct cardiac pathophysiology under hyperoxia compared to uncomplicated patients, with males being at high risk. These findings can be used to enhance provision of care in ICU patients with Type I diabetes as a comorbid condition.

scholarly journals The Implications of Hyperoxia, Type 1 Diabetes and Sex on Cardiovascular Physiology in Mice

2021 ◽  
Author(s):  
Katarina Bojkovic ◽  
Jennifer Rodgers ◽  
Riddhi Vichare ◽  
Asmita Nandi ◽  
Hussein Mansour ◽  
...  
Keyword(s):  
Cardiac Remodeling ◽  
Type I Diabetes ◽  
Comorbid Condition ◽  
Diabetic Patients ◽  
Type I ◽  
Wild Type ◽  
Cardiac Pathophysiology ◽  
Provision Of Care ◽  
Akita Mice

Abstract Oxygen supplementation, although a cornerstone of emergency and cardiovascular medicine, often results in hyperoxia, a condition characterized by excessive tissue oxygen which results in adverse cardiac remodeling and subsequent injurious effects to physiological function. Cardiac remodeling is further influenced by various risk factors, including pre-existing conditions and sex. Thus, the purpose of this experiment was to investigate cardiac remodeling in Type I Diabetic (Akita) mice subjected to hyperoxic treatment. Overall, we demonstrated that Akita mice experience distinct challenges from wild type (WT) mice. Specifically, Akita males at both normoxia and hyperoxia showed significant decreases in body and heart weights, prolonged PR, QRS, and QTc intervals, and reduced %EF and %FS at normoxia compared to WT controls. Moreover, Akita males largely resemble female mice (both WT and Akita) with regards to the parameters studied. Finally, statistical analysis revealed hyperoxia to have the greatest influence on cardiac pathophysiology, followed by sex, and finally genotype. Taken together, our data suggest that Type I diabetic patients may have distinct cardiac pathophysiology under hyperoxia compared to uncomplicated patients, with males being at high risk. These findings can be used to enhance provision of care in ICU patients with Type I diabetes as a comorbid condition.

scholarly journals The Implications of Hyperoxia, Type 1 Diabetes, and Sex on Cardiovascular Physiology in Mice

2021 ◽  
Author(s):  
Katarina Bojkovic ◽  
Jennifer Leigh Rodgers ◽  
Riddhi Vichare ◽  
Asmita Nandi ◽  
Hussein Mansour ◽  
...  
Keyword(s):  
Cardiac Remodeling ◽  
Type I Diabetes ◽  
Comorbid Condition ◽  
Diabetic Patients ◽  
Type I ◽  
Wild Type ◽  
Cardiac Pathophysiology ◽  
Airtight Chamber ◽  
Provision Of Care ◽  
Akita Mice

Abstract BackgroundOxygen supplementation, although a cornerstone of emergency and cardiovascular medicine, often results in hyperoxia, a condition characterized by excessive tissue oxygen which results in adverse cardiac remodeling and subsequent injurious effects to physiological function. Cardiac remodeling is further influenced by various risk factors, including pre-existing conditions and sex. Thus, the purpose of this experiment was to investigate cardiac remodeling in Type I Diabetic (Akita) mice subjected to hyperoxic treatment. MethodsMale and female Akita and wild-type (WT) mice were divided into four groups based on gender and treatment, and were then subjected to either FiO2 > 90% (hyperoxia) for 72 h in an airtight chamber or normal air (normoxia). Physical, functional, and electrophysiological parameters were then evaluated. Finally, we employed correlational analysis and Multi-Way Analysis of Variance (ANOVA) which determined hyperoxia to have the greatest statistical influence on cardiac pathophysiology, followed by sex, and finally genotype.ResultsOverall, we demonstrated that Akita mice experience distinct challenges from wild type (WT) mice. Specifically, Akita males at both normoxia and hyperoxia showed significant decreases in body and heart weights, prolonged PR, QRS, and QTc intervals, and reduced %EF and %FS at normoxia compared to WT controls. Moreover, we found Akita males largely resemble female mice (both WT and Akita) with regards to the parameters studied. ConclusionsTaken together, our data suggest that Type I diabetic patients may have distinct cardiac pathophysiology under hyperoxia compared to uncomplicated patients, with males being at high risk. These findings can be used to enhance the provision of care in ICU patients with Type I diabetes as a comorbid condition.

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.

Antidiabetic effect of Psychotria malayana Jack in induced type 1 diabetic rat

MEDISAINS ◽  
2020 ◽  
Vol 18 (1) ◽  
pp. 19
Author(s):  
Fairuz Fairuz ◽  
Hasna Dewi ◽  
Humaryanto Humaryanto
Keyword(s):  
Blood Glucose ◽  
Side Effects ◽  
Type I Diabetes ◽  
Langerhans Cell ◽  
Diabetic Rat ◽  
Type I ◽  
Antidiabetic Effect ◽  
Glucose Levels ◽  
Blood Glucose Levels

Background: Therapies for hyperglycemic treatment, including insulin and oral diabetes medications, have been confirmed to cause several side effects. Thus, finding new drugs with fewer side effects is of high importance. Salung leaf herb (Psychotria malayana Jack) reported used in traditional societies as a treatment for diabetes. However, the scientific proof of this plant for diabetes treatment is still lacking.Objective: To evaluate the antidiabetic effect of the P. malayana jack in induced type 1 diabetic rats by assessing blood glucose level and pancreatic cells in white rats.Methods: Alloxan used to induce type I diabetes. Rats randomly divided into six groups. A Group P1 received 250 mg/kg BW; group P2 received 500 mg/kg BW, group P3 received 1000 mg/kg BW. While group 4 basal received no treatment, group 5 received distilled water as a negative control, and group 6 received glibenclamide as a positive control. Medications are given for six days. Glucose levels were measured, and observation of pancreatic Langerhans cell damages.Results:  A decrease in blood glucose levels observed in all treatment groups. The most significant reduction (49.76%; 1000 mg/kg BW) occurred in the P3 group. Morphological features of pancreatic Langerhans cell damage were slightly high in the P1 group.Conclusion: P. malayana Jack can consider having an antidiabetic effect in a type 1 diabetic rat by reducing blood glucose levels.

Stem Cell-Based Therapies: A New Ray of Hope for Diabetic Patients

2019 ◽  
Vol 14 (2) ◽  
pp. 146-151 ◽  
Author(s):  
Junaid Khan ◽  
Amit Alexander ◽  
Mukta Agrawal ◽  
Ajazuddin ◽  
Sunil Kumar Dubey ◽  
...  
Keyword(s):  
Stem Cells ◽  
Stem Cell ◽  
Drug Therapy ◽  
Type I Diabetes ◽  
Embryonic Stem ◽  
Health Concern ◽  
Future Research ◽  
Diabetic Patients ◽  
Successful Implementation ◽  
Type I

Diabetes and its complications are a significant health concern throughout the globe. There are physiological differences in the mechanism of type-I and type-II diabetes and the conventional drug therapy as well as insulin administration seem to be insufficient to address the problem at large successfully. Hypoglycemic swings, frequent dose adjustments and resistance to the drug are major problems associated with drug therapy. Cellular approaches through stem cell based therapeutic interventions offer a promising solution to the problem. The need for pancreatic transplants in case of Type- I diabetes can also be by-passed/reduced due to the formation of insulin producing β cells via stem cells. Embryonic Stem Cells (ESCs) and induced Pluripotent Stem Cells (iPSCs), successfully used for generating insulin producing β cells. Although many experiments have shown promising results with stem cells in vitro, their clinical testing still needs more exploration. The review attempts to bring into light the clinical studies favoring the transplantation of stem cells in diabetic patients with an objective of improving insulin secretion and improving degeneration of different tissues in response to diabetes. It also focuses on the problems associated with successful implementation of the technique and possible directions for future research.

A program to reduce onset distress in unselected type I diabetic patients: effects on psychological variables and metabolic control

1995 ◽  
Vol 132 (5) ◽  
pp. 580-586 ◽  
Author(s):  
K Spiess ◽  
G Sachs ◽  
P Pietschmann ◽  
R Prager
Keyword(s):  
Patient Education ◽  
Metabolic Control ◽  
Type I Diabetes ◽  
Intensive Treatment ◽  
Medical Psychology ◽  
Diabetic Patients ◽  
Type I ◽  
Psychological Variables ◽  
Reduction Program

Spiess K, Sachs G, Pietschmann P, Prager R. A program to reduce onset distress in unselected type I diabetic patients: effects on psychological variables and metabolic control. Eur J Endocrinol 1995;132:580–6. ISSN 0804–4643 This paper reports the results of a prospective controlled trial of a program addressing reduction of onset distress and better future adaptation in adults who were enrolled at the time of diagnosis of type I diabetes mellitus. Patients were assigned randomly to either standard intensive treatment and patient education with the distress reduction program (N = 10) or to standard intensive treatment and patient education without this program (N = 13). Prospective follow-up of patients with multiple validated measures of treatment outcome showed less anxious coping behavior, less depression and less denial at the 9-month follow-up and less denial at the 15-month follow-up in the group with the distress reduction program, but no differences in metabolic control between the two groups at any time. We conclude that our program has a positive impact on the crisis at diabetes onset; the lower denial in the treatment group may lead to improved regimen adherence in the long term. Klaus Spiess, Institute of Medical Psychology, University of Vienna, Severingasse 9, A-1090-Vienna, Austria

scholarly journals Calcium Homeostasis in Ventricular Myocytes of Diabetic Cardiomyopathy

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Lina T. Al Kury
Keyword(s):  
Diabetes Mellitus ◽  
Diabetic Cardiomyopathy ◽  
Contractile Function ◽  
Type I Diabetes ◽  
Heart Function ◽  
Diabetic Rat ◽  
Diabetic Patients ◽  
Type I ◽  
High Blood Glucose ◽  
Cardiac Contractile

Diabetes mellitus (DM) is a chronic metabolic disorder commonly characterized by high blood glucose levels, resulting from defects in insulin production or insulin resistance, or both. DM is a leading cause of mortality and morbidity worldwide, with diabetic cardiomyopathy as one of its main complications. It is well established that cardiovascular complications are common in both types of diabetes. Electrical and mechanical problems, resulting in cardiac contractile dysfunction, are considered as the major complications present in diabetic hearts. Inevitably, disturbances in the mechanism(s) of Ca2+ signaling in diabetes have implications for cardiac myocyte contraction. Over the last decade, significant progress has been made in outlining the mechanisms responsible for the diminished cardiac contractile function in diabetes using different animal models of type I diabetes mellitus (TIDM) and type II diabetes mellitus (TIIDM). The aim of this review is to evaluate our current understanding of the disturbances of Ca2+ transport and the role of main cardiac proteins involved in Ca2+ homeostasis in the diabetic rat ventricular cardiomyocytes. Exploring the molecular mechanism(s) of altered Ca2+ signaling in diabetes will provide an insight for the identification of novel therapeutic approaches to improve the heart function in diabetic patients.

scholarly journals Exploring perceptions and use of the patient portal by young adults with type 1 diabetes: A qualitative study

2020 ◽  
Vol 26 (4) ◽  
pp. 2586-2596
Author(s):  
Kathy K Marsh ◽  
Ruth A Bush ◽  
Cynthia D Connelly
Keyword(s):  
Qualitative Study ◽  
Emerging Adults ◽  
Chronic Conditions ◽  
Type I Diabetes ◽  
Chronically Ill ◽  
Chronic Illnesses ◽  
Self Management ◽  
Type I ◽  
Patient Portal

Emerging adults have been raised in the digital age and are therefore prime candidates for using a patient portal to manage chronic conditions. The limited body of research both identifies the underutilization of the patient portal and suggests increased use of the portal for the chronically ill as a tool to alleviate caregiver stress, as well as a potential modality to assist emerging adults to manage their chronic illnesses. This qualitative study was completed to obtain an understanding of emerging adults familiarity with the electronic patient portal and to elicit the perception of the usefulness of the portal to support self-management of type I diabetes. Findings provide a preliminary understanding of how a sampling of emerging adults with type I diabetes uses, perceives the benefits of, and wants to improve technology for diabetes self-management.

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