Retinal oximetry: Metabolic imaging for diseases of the retina and brain

Publication date: Available online 15 April 2019Source: Progress in Retinal and Eye ResearchAuthor(s): Einar Stefánsson, Olof Birna Olafsdottir, Thorunn S. Eliasdottir, Wouter Wehmeijer, Anna Bryndis Einarsdottir, Toke Bek, Thomas Lee Torp, Jakob Grauslund, Thor Eysteinsson, Robert Arnar Karlsson, Karel Van Keer, Ingeborg Stalmans, Evelien Vandewalle, Margarita G. Todorova, Martin Hammer, Gerhard Garhöfer, Leopold Schmetterer, Martin Šín, Sveinn Hakon HardarsonAbstractRetinal oximetry imaging of retinal blood vessels measures oxygen saturation of hemoglobin. The imaging technology is non-invasive and reproducible with remarkably low variability on test-retest studies and in healthy cohorts. Pathophysiological principles and novel biomarkers in several retinal diseases have been discovered, as well as possible applications for systemic and brain disease.In diabetic retinopathy, retinal venous oxygen saturation is elevated and arteriovenous difference progressively reduced in advanced stages of retinopathy compared with healthy persons. This correlates with pathophysiology of diabetic retinopathy where hypoxia stimulates VEGF production. Laser treatment and vitrectomy both improve retinal oximetry values, which correlate with clinical outcome. The oximetry biomarker may allow automatic measurement of severity of diabetic retinopathy and predict its response to treatment.Central retinal vein occlusion is characterized by retinal hypoxia, which is eviden...
Source: Progress in Retinal and Eye Research - Category: Opthalmology Source Type: research

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CONCLUSION: Arterial hypertension and elevated diastolic blood pressure are associated with a risk for AS requiring surgery in subjects below 60 years of age. Strict blood pressure control in this group is strongly advocated to avoid other cardiovascular diseases correlated to hypertension. If hypertension and elevated diastolic blood pressure are risk factors for developing AS requiring surgery need further investigations. Notably, elevated fasting glucose levels were related to AS requiring surgery in older adults without concomitant CAD. PMID: 31109205 [PubMed - in process]
Source: Scandinavian Cardiovascular Journal - Category: Cardiology Tags: Scand Cardiovasc J Source Type: research
Conclusions: Glucose fluctuation aggravates mesangial cell apoptosis, which may be partly induced by activating oxidative stress and inhibiting the AKT signaling pathway. PMID: 31110541 [PubMed]
Source: Archives of Medical Science - Category: General Medicine Tags: Arch Med Sci Source Type: research
Authors: Grzelak T, Wedrychowicz A, Grupinska J, Pelczynska M, Sperling M, Mikulska AA, Naughton V, Czyzewska K Abstract Introduction: The aim of our study was to determine the relationship between neuropeptide B (NPB), neuropeptide W (NPW), nutritional and antioxidant status and selected fat- and bone-derived factors in type 1 diabetes mellitus (T1DM) treated using pens (T1DM pen group) or insulin pumps (T1DM pump group) in order to investigate the potential role of NPB and NPW in the clinical outcomes of T1DM. Material and methods: Fifty-eight patients with T1DM and twenty-five healthy controls (CONTR) partic...
Source: Archives of Medical Science - Category: General Medicine Tags: Arch Med Sci Source Type: research
Authors: Wierzba W, Pinkas J, Karnafel W, Dziemidok P, Jawień A, Śliwczynski A Abstract Introduction: There are reports that diabetes mellitus reduces the risk of aortic aneurysms and many reports that diabetes mellitus reduces the risk of abdominal aortic aneurysms. In earlier years there were also studies that did not demonstrate any effects of diabetes on the rate of aortic aneurysms. Material and methods: For the year 2012, between 1 January and 31 December, reports for services regarding treatment for aortic aneurysms were found. At the same time, the reports for services associated with diabetes with th...
Source: Archives of Medical Science - Category: General Medicine Tags: Arch Med Sci Source Type: research
Conclusions: Patients with RHS who have an elevated NLR have poor outcomes in terms of the H-B grade. Therefore, the NLR may be useful for evaluating the prognosis of patients with RHS.ORL
Source: ORL - Category: ENT & OMF Source Type: research
AbstractHerein we describe four patients with acquired hemophilia A (AHA) caused by factor VIII (FVIII) inhibitor and histories of dipeptidyl peptidase-4 inhibitor (DPP4-I) treatment for diabetes mellitus (DM). Drug exposure can cause a breakdown of immune tolerance to FVIII associated with CD4 T cells, resulting in the induction of autoantibodies against FVIII. In patient 1 in the present series, FVIII inhibitor disappeared after DPP4-I treatment. The DPP4-I treatment was stopped faster in patient 1 than it was in patient 2, whose FVIII inhibitor titer was higher than patient 1 ’s. Two patients died: patient 3 due t...
Source: Diabetes Therapy - Category: Endocrinology Source Type: research
ConclusionsMaking use of laboratory technology, it is possible to detect new cases of type 2 diabetes and prediabetes and to improve disease monitoring.
Source: Diabetes Therapy - Category: Endocrinology Source Type: research
DiabetesMine offers key information and tips on thriving with menopause when you live with diabetes.
Source: Diabetes Mine - Category: Endocrinology Authors: Source Type: blogs
Conclusions: The frequency of incidental histological diagnosis of PanNET is considerably high, suggesting that their real prevalence is probably underestimated. The present study suggests a possible correlation between the incidental occurrence of PanNET and IPMN.Neuroendocrinology
Source: Neuroendocrinology - Category: Endocrinology Source Type: research
CONCLUSION: In conclusion, cirrhosis in HFE p.C282Y homozygotes is significantly associated with age, diabetes, daily alcohol intake, and iron removed by phlebotomy, taking into account the effect of other variables. PMID: 31104803 [PubMed - in process]
Source: Annals of Hepatology - Category: Gastroenterology Tags: Ann Hepatol Source Type: research
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