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Search for the word below: reactive oxygen metabolites
Number of hits: 57
NOVEMBER 30, 2020
The relationship among obstructive sleep apnea syndrome (OSAS), type 2 diabetes mellitus (DM2) and obesity is very complex and multi-directional. Obesity and increased visceral fat are important perpetuating factors for DM2 in patients with OSAS. On the other hand, OSAS itself leads to obesity by causing both leptin and insulin resistance as a consequence of activation of the sympathetic nervous system. Risk for developing DM2 further increases in patients with OSAS and obesity. Data regarding effects of positive airway pressure (PAP) therapy, gold standard treatment for OSAS, on glycemic control were inconsistent due to variability in duration of and adherence to PAP therapy. In our cohort study we investigated effects of PAP treatment on glucose metabolism in normal-weighted non-diabetic OSAS patients, in obese non-diabetic OSAS patients, and in OSAS patients with DM2. We prospectively analyzed 67 patients diagnosed with OSAS and documented to be effectively treated with PAP therapy for three months. Apnea-hypopnea index was highest in the diabetic group, being significantly higher than in the normal-weighted group (p=0.021). Mean HOMA values were significantly higher in obese (p=0.002) and diabetic group (p=0.001) than normal-weighted group; the differences were still significant after PAP therapy. HbA1c levels were significantly higher in diabetic group compared to those in normal-weighted (p=0.012) and obese (p=0.001) groups. After PAP treatment, decrease in HbA1c levels were significant in normal-weighted (p=0.008), obese (p=0.034), and diabetic (p=0.011) groups. There was no correlation with the change in HbA1c levels and age (p=0.212), BMI (p=0.322), AHI (p=0.098) or oxygen levels (p=0.122). Our study showed that treatment of OSAS by PAP therapy offers beneficial effect on glucose metabolism, not only in diabetic patients, but also in obese and normal-weighted OSAS patients. Although data regarding overall effects of PAP therapy on glycemic control present contradictory results in the literature, it should be emphasized that duration and adherence to PAP therapy were main determinants for beneficial outcome of treatment.
NOVEMBER 20, 2015
[Relapsing polychondritis (RP) is an episodic and progressive inflammatory disease of cartilaginous structures. Its diagnosis is based primarily on clinical features such as laboratory parameters, biopsy. Neurological complications occur in 3% of the cases and are classified as an important cause of death. The cranial nerve disorders are most common but hemiplegia, ataxia, myelitis, polyneuritis, seizures, confusion, hallucination and headache can also happen. The aetiology of central nervous system involvement is still unknown. Moreover stroke has rarely reported in these patients. The diagnosis of stroke is challenging because of its rarity among these patients. Perhaps vasculitis is the common underlying mechanism. Also meningitis and encephalitis can occur during the course of RP. A 44 year-old woman was admitted with uncontemplated left hemiparesis, redness, swelling, and tenderness of the metacarpophalangeal and interphalangeal joints of the right hand and the cartilaginous portion. White blood cell count, C-reactive protein and the erythrocyte sedimentation rate were elevated. Vasculitis biomarkers were normal in our patient. Carotid and vertebral artery doppler ultrasonography, cranial and cervical MR Angiography were normal. Echocardiography showed a mild mitral valve prolapse and regurgitation. Our patient had the history of auricular polychondritis but she had not been diagnosed. Hemiparesis was her first neurological manifestation that led her to doctors for diagnosis. Our patient fulfilled the criteria of RP so no biopsy was needed. She was treated with oral prednisolone (80 mg/day) and aspirin (300 mg/day) and now she is on 10 mg prednisolone and 150 mg azathioprine. Two months later her physical and neurological symptoms returned to normal.]
JANUARY 30, 2016
Cheyne-Stokes respiration (CSR) is a form of sleep-disordered breathing characterised by recurrent central sleep apnoea alternating with a crescendo-decrescendo pattern of tidal volume, relatively rare observation in sleep labs. It is mainly seen in severe heart failure and stroke. We report the case of a young man with CSR after sudden onset of seizure in the context of hypertensive exacerbation leading to the diagnosis of a leukoencephalopathy, and comment on differential diagnoses, prognostic and therapeutic outcomes. The very uniqueness of this case consists in the extremely young age for developing a vascular encephalopathy in the absence of genetic diseases and without previous diagnose of hypertension. There is no adequate explanation for the origin of vascular encephalopathy; also there is lack of evidence regarding the benefits and modality of treatment for CSR in neurologic diseases. Thus, we were forced to find the best compromise in a nocturnal oxygen therapy and follow-up.
JANUARY 30, 2020
[Recent data suggest that long-term worsening is common in relapsing-remitting multiple sclerosis patients and is largely independent of relapses or new lesion formation on brain MRI. The current definition of secunder progressive multiple sclerosis is worsening of disability independent of relapses over at least 6-month interval. Early focal inflammatory disease activity and spinal cord lesion are predictors of very-long term disease outcomes in relapse - onset multiple sclerosis. The potential of PET imaging to visualize hidden inflammation in MS brain in vivo is an important contribution for better understanding the progression of the disease. Therefore, PET imaging is a promising tool in detecting the conversion from relapsing remitting multiple sclerosis to secunder progressive form of multiple sclerosis. Furthermore, neuro-axonal damage is the pathological substrate of permanent disability in different neurological disorders including multiple sclerosis. The neurofilament proteins have promise in this context because their levels rise upon neuro-axonal damage not only in the cerebrospinal fluid but also in blood. Patients with increased serum levels of neurofilament at baseline, independent of other clinical and MRI variables, experience significantly more brain and spinal cord volume loss over 2 years and 5 years of follow-up. The kynurenine-pathway abnormalities may be associated with the swich from early-mild stage multiple sclerosis to debilitating progressive forms of the disease. Analysis of these metabolites in serum may have application as multiple sclerosis disease biomarkers. Free radical action has been suggested as a causal factor in the illness. Increased free radical production and consumption of the scavenger molecules were found during the active phase of the disease. Based on the clinical findings (EXPAND Study) and pathomechanism of the disease siponimod is approved by the US Food and Drug Administration for the treatment of relapsing remitting forms of multiple sclerosis, to include secunder progressive multiple sclerosis with active disease, relapsing-remitting multiple sclerosis and clinically isolated syndrome.]
Journal of Nursing Theory and Practice
JUNE 30, 2019
[The Surviving Sepsis Guideline (SSG) is a document that proposed new solutions in the diagnostics and treatment of sepsis. The methods identified were the 100% oxygen therapy, fluid resuscitation, blood culture and microbiological analysis, empiric combination antibiotic therapy, lactate monitoring, comparison of PCT and CRP, and surgical opening. Using the above mentioned methods has proven to improve the quality of sepsis treatment and the safety of patients. Sepsis -6 protocol has been highlighted by the authors as a process that is easy to implement in terms of cost while remaining highly beneficial. This recommendation should also be well known for nurses that do not work in emergency units. This will help recognise sepsis at an early stage, and provide guideline in the analytical examination and the possibilities within the competence. ]
Lege Artis Medicinae
SEPTEMBER 10, 2019
[Peripheral artery disease (PAD) is of high prevalence, and one of the most common clinical manifestations of the atherosclerosis beside ischaemic heart disease and cerebrovascular disease. PAD should be considered as a systemic disease, PAD patients have two times higher ten-year cardiovascular mortality than the normal population. For these reasons, the early recognition of the disease, the appropriate secondary preventive medical and non-medical therapy are of great importance. Risk stratification, proper physical examination, ankle pressure, ankle-brachial index, toe pressure, transcutaneous partial tissue oxygen pressure measurement and duplex ultrasound are the cornerstones to an early diagnosis. This summary aims at calling attention to the fact that lower extremity pain can not only be caused by musculosceletal diseases but limb and/or life-threatening limb ischaemia can be revealed in the background. ]
JULY 30, 2019
Introduction - The aim of this study is to evaluate utility of CHADS2 score to estimate stroke severity and prognosis in patients with ischemic stroke due to non-valvular atrial fibrillation (AF) in addition to evaluate effects of hematologic and echocardiographic findings on stroke severity and prognosis. Methods - This prospective study included 156 ischemic stroke cases due to non-valvular AF in neurology ward of Trakya University Medical School between March 2013-March 2015. National Institute of Health Stroke (NIHS) score was used to evaluate severity of stroke at admission. Carotid and vertebral Doppler ultrasonography findings, brain computed tomography (CT) and magnetic resonance imaging (MRI) of the cases were evaluated. Left atrial diameter and ejection fraction (EF) values were measured. CHADS2 score was calculated. Modified Rankin Scale was used to rate the degree of dependence. Effects of age and sex of the patients, presence of diabetes mellitus (DM), Congestive Heart Failure (CHF), Cerebrovascular Disease (CVD) and C-reactive protein (CRP) levels on CHADS2, NIHS, and mRS were evaluated. Results - In patients with age ≥75, mean NIHS score was 3.3 points and mean mRS score was 1.02 points higher, than in patient below 75 years of age. Compared with the mild risk group, cases in the high risk group had older age, higher serum D-dimer, fibrinogen and CRP levels and lower EF. A positive relation was detected between stroke severity and Hemorrhagic Transformation (HT), previous CVD history, and presence of CHF. A significant association was found between increased stroke severity and Early Neurological Deterioration (END) development. Older age, higher serum fibrinogen, D-dimer, CRP and lower EF values were associated with poor prognosis. History of CVD and presence of CHF were associated with poor prognosis. END development was found to be associated with poor prognosis. In the high-risk group, 30.3% (n = 33) had END. Among those in the high-risk group according to the CHADS2 score, END development rate was found to be significantly higher than in the moderate risk group (p <0.05). There was a strong positive correlation between CHADS2 and NIHS scores. mRS score increased with increasing CHADS2 score and there was a strong correlation between them. Effect of stroke severity on prognosis was assessed and a positive correlation was found between NIHS score and mRS value. Discussion - Our study demonstrated the importance of CHADS2 score, haemostatic activation and echocardiographic findings to assess stroke severity and prognosis. Knowing factors which affect stroke severity and prognosis in patients with ischemic stroke may be directive to decide primary prevention and stroke management.
MARCH 30, 2019
Background - Atrial fibrillation (AF) is the most common arrhythmia diagnosed in clinical practice. We aimed to measure the L-arginine pathway metabolites as well as their ratios in patients with different types of AF or sinus rhythm and to explore the relationship among the markers and clinical variables in the subacute phase of acute ischemic stroke (AIS). Methods - A total of 46 patients with AIS were prospectively enrolled. The patients were divided into three groups based on diagnosis of either sinus rhythm, paroxysmal or permanent AF. Plasma concentration of the L-arginine pathway metabolites were analyzed at post-stroke 24 hours in the three rhythm groups. Besides, clinical variables and laboratory data were recorded. Results - Asymmetric dimetylarginine (ADMA) was significantly higher in patients with permanent AF compared to sinus rhythm (p<0.001). Both ADMA (p<0.001) and symmetric dimethylarginine (SDMA) (p<0.002) at 24 hours were significantly higher among patients with permanent AF compared to those with paroxysmal AF. The L-arginine/SDMA (p<0.031) ratios at 24 hours were significantly higher among patients with sinus rhythm compared to those with permanent AF. ROC analysis also revealed that plasma SDMA cut-off level over 0.639 μmol/L discriminated permanent AF from paroxysmal AF or sinus rhythm with a 90.9% sensitivity and 77.1% specificity. Neutrophil-lymphocyte ratio also showed significantly higher value in individuals with both paroxysmal and permanent AF (p=0.029). Conclusions - Plasma level of SDMA could discriminate permanent from paroxysmal AF in the subacute phase of ischemic stroke. In addition, an increased neutrophil-lymphocyte ratio may suggest inflammatory process in the evolution of atrial fibrillation.
Lege Artis Medicinae
DECEMBER 10, 2018
[The Immunoglobulin G4-related disease (IgG4-RD) along with its synonyms is recently a popular topic in the medical literature. This illness can affect almost every organ in the body therefore it is frequently discussed in any type of interdisciplinary forums. We presented an instructive case of IgG4-RD with gastric involvement in 2016. Hereby we share our pertinent experiences. We are not dealing with the IgG4-RD in general including its terminology problems, epidemiology, pathogenesis, detailed clinical/pathological appearances, diagnostic criteria and treatment. A 63-year-old male presented with symptoms of pylorus stenosis. The endoscopic findings and CT images were interpreted as those of a malignant tumour in the antrum of the stomach. So a subtotal resection was performed although the biopsy showed reactive proliferation of plasma cells without evidence of malignancy. Pathological examination of the surgical specimen confirmed an IgG4- associated sclerosing inflammation. The patient had an uneventful recovery. Our case is an example of rare, isolated formof IgG4-RD. ]
NOVEMBER 30, 2018
Objective - Benign paroxysmal positional vertigo (BPPV) is the most common cause of recurrent vertigo. Inflammation is a hypothetic etiological factor in BPPV. The aim of this study was to evaluate inflammatory biomarker levels in BPPV patients and compare these with the healthy subjects. Materials and methods - This prospective case-control study was conducted with 114 newly diagnosed BPPV patients and age- and sex- matched 83 healthy subjects. The laboratory investigations included serum hemogram, full biochemistry profiles, vitamin levels, thyroid hormone profiles, high sensitivity C-reactive protein (hsCRP) and erythrocyte sedimentation rate (ESR). Neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), and monocyte to HDL-cholesterol ratio (MHR) values were calculated and compared between the patients and healthy subjects. Results - The mean age was 39.1 ± 12.4 years for patients, and 37.0 ± 11.9 for controls. Vitamin B12, hematocrit (Hct), creatinine, urea, and fT4 values, lymphocyte, total bilirubin, direct bilirubin and indirect bilirubin levels were significantly lower in BPPV patients (p ˂ 0.05), while HDL, SGOT, and ESR values were significantly higher. In the BPPV patients the mean NLR, PLR, and mean platelet volume (MPV) values were significantly higher than in the control subjects. Neutrophil, platelet, monocyte, MHR, and CRP values were similar in both groups (p ˃ 0.05). Conclusion - Our result suggests that NLR, PLR, MPV, ESR, and bilirubin levels should be taken into account as potential biomarkers of BPPV. As they are inexpensive parameters and widely available, they can be used in clinical practice for prediction of BPPV. However, further large-scale studies are required to confirm this relationship.
Clinical NeuroscienceLate carcinomatous meningitis as vertigo
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