Mariana Cornelia Tilinca, Eniko Csilla Barabas-Hajdu, Gizella Tusa Ferencz and Eniko Nemes-Nagy
Márta Germán-Salló, Enikő Nemes-Nagy, Beáta Baróti, Robert Gabriel Tripon and Zoltán Preg
The current guidelines for the diagnosis and treatment of hypertension recommend screening for cognitive impairment in all hypertensive patients as part of the clinical assessment. However, the implementation of this recommendation in clinical practice is still unsatisfactory. We present the case of an elderly hypertensive female patient in order to highlight the importance of screening for cognitive impairment. A patient with a history of poorly controlled hypertension for the last 12 years and recently diagnosed with type 2 diabetes mellitus is admitted complaining of asthenia, dizziness, visual acuity impairment, and difficulty to remember recent information. Cardiovascular imaging showed 70% internal carotid artery stenosis in a neurologically asymptomatic patient. Cognitive testing showed mild cognitive impairment. Retinal imaging identified stage III hypertensive retinopathy accompanied by irreversible end-organ damage due to microvascular changes. At this point brain MRI was performed, which identified both macro- and microvascular brain lesions in the periventricular white matter and sequelae of a former ischemic stroke in the territory of the left posterior cerebral artery. Cognitive testing helped to unmask silent cerebrovascular disease in an otherwise oligosymptomatic hypertensive diabetic patient. Cognitive function testing should be introduced in routine clinical practice in order to help unmask silent cerebrovascular disease.
Enikő Nemes-Nagy, Robert Gabriel Tripon, Sándor Pál and Mariana Cornelia Tilinca
The association of multiple autoimmune diseases may represent the main focus of physicians treating patients with such pathology presenting no comorbidities of different etiology. However, autoimmune diseases and side effects of drugs may lead to development of silent health-threatening diseases that should be identified promptly. We present the case of an elderly, obese, Caucasian female patient suffering of autoimmune thyroiditis, rheumatoid arthritis, and psoriasis, who developed arterial hypertension and insulin-treated secondary diabetes mellitus (due to long-term oral corticotherapy) with microvascular end-organ changes. Retinal imaging for capillary anomalies identified mild non-proliferative diabetic retinopathy with apparent diabetic macular edema and hypertensive retinopathy. Laboratory investigations looking for further vascular risk factors revealed zinc deficiency, elevated serum homocysteine levels, and constantly high C-reactive protein concentration. Attention should be payed to the proper investigation of patients with autoimmune diseases, targeting the early diagnosis of microvasculopathies due to autoimmune diseases or possible medication side effects, in order to prevent end-organ damage.
Hajnal Kelemen, Gabriel Hancu, Serban Andrei Gâz-Florea, Eniko Nemes-Nagy, Lajos Attila Papp and Eleonora Mircia
Objective: Miconazole, an imidazole antifungal derivative, is a very hydrophobic compound, a major drawback in obtaining topical pharmaceutical formulations with optimal bioavailability. Cyclodextrins (CDs) may increase local drug delivery by enhancing the drug release and/or permeation. The aim of the study is the characterization of inclusion complexes between miconazole and different CD derivatives.
Methods: Several CD derivatives were tested in the experiments. The binary systems between miconazole and different CDs were prepared in 1:1 molar ratios by physical-mixture and kneading methods. Differential scanning calorimetry (DSC) and Fourier transformed-infrared spectroscopy (FT-IR) methods were used to characterize solid state interactions between miconazole and CDs in their binary systems.
Results: The FT-IR analysis suggests the formation of a new solid phase, indicating a molecular interaction between the components. The DSC analysis sustains the hypothesis of formation of partial inclusion complexes between miconazole nitrate and CD.
Conclusion: The thermic behaviour of the complexes depends both on the preparation method and the composition of the products.
Kovacs Zsolt, Tripon Robert, Nemes Nagy Eniko, Balogh Samarghitan Victor, Tilinca Mariana, Martha Orsolya and Fazakas Zita
Arylsulfatase A (ARSA) is a lysosomal enzyme that plays an important role in catalysis of degradation of cerebrosidesulphate. The deficiency of this lysosomal enzyme causes an autosomal recessive disorder, called metachromatic leucodystrophy. However, a low ARSA activity can be observed in clinically healthy people, called ARSA pseudodeficiency. In our study we investigated the possible linkage between ARSA activity and sulfatide deficiency causing characteristic aspects of degenerative diseases, such as end stage kidney disease, type 2 Diabetes mellitus, Parkinson syndrome, prostate cancer and HIV (Human Immunodeficiency Virus) infection. We used a spectrophotometric method to determine the activity of ARSA. This method of enzyme dosage is based on a 4 hour long hydrolysis of the ARSA enzyme on 4-nitrocatechol sulfate (p-NCS) substrate. The unit of this measurement is nmol/ml/4h. Our findings show significant values in type 2 diabetes, Parkinson syndrome and chronic kidney disease. The importance of sulfatide in these diseases is well-known, thus presumably the variation of the ARSA’s activity might play an important role in the pathophysiology of these diseases, involving a vicious cycle between sulfatide degradation andthese diseases.
Adrian Maier, Adrian Man, Călin Chibelean, Teodora Cighir, Eniko Nemes-Nagy, Ioana Maier, Ciprian Todea, Oliver Vida and Orsolya Martha
Objective: To evaluate the bacteriological features in non-struvite nephrolithiasis and in its associated urinary tract infection, and to establish the relationship between the two pathologies.
Methods: The non-struvite calculi from 132 patients were aseptically extracted by percutaneous nephrolithotomy (PNL). The midstream urine and calculi were bacteriologically and biochemically processed.
Results: Most calculi (78%) were located to renal pelvis, associated with hydronephrosis, the biochemical composition confirming the lack of struvite and revealing the predominance of calcium oxalate. The females presented significantly more colonized calculi (50%) than males (21.9%), with higher bacteriological diversity. There is a significant relation between the presence of colonized calculi and urinary tract infections, 24.2% of calculi and 25.8% of the urine samples presenting positive cultures. In 70.4% of cases, we found the same antibiotic resistance pattern between the pathogens isolated from calculi and urine, thus considering them identical strains. The Enterobacteriaceae represented the most predominant bacteria both from calculi (62.5%) and urine (63.6%), approximatively 30% being resistant to cephalosporins and over 50% resistant to fluoroquinolones, ampicillin and tetracycline. There were 3.8% of cases in which the calculi were colonized but the urine was sterile, the bacteria being sensitive to cephalosporins that are used as prophylaxis.
Conclusions: In all the cases, the same bacterial species was found both in calculi and urine, and 70.4% of them were phenotypically identical. The resistance to the second generation cephalosporins is lower than in the case of other antibiotics, which makes them the most suitable for prophylaxis in PNL.
Cosmina Cristina Uzun, Septimiu Voidăzan, Enikő Nemes-Nagy, V. Balogh-Sămărghiţan, Fazakas Zita, B.P. Uzun and B. Szabó
Erzsébet Fogarasi, Mircea Dumitru Croitoru, Ibolya Fülöp, Enikő Nemes-Nagy, Robert Gabriel Tripon, Zsuzsanna Simon-Szabo and Daniela-Lucia Muntean
Oxidative stress appears when the amount of free radicals that are formed in a living organism exceed its spin-trapping ability. One of the most dangerous free radicals that are formed in the human body is the hydroxyl radical. It can alter several biomolecules, including the unsaturated fatty acids; this process is known as lipid peroxidation and can lead to cell necrosis and generation of several harmful byproducts including malondialdehyde, which serves also as a biomarker of oxidative stress. A new HPLC method with visible detection was developed for the detection of malondialdehyde in human serum and saliva samples. The method was verified in terms of specificity, linearity, limits of detection (0.35 ng/ml), limit of quantification (1.19 ng/ml), recovery (90.13±10.25 – 107.29±14.33) and precision (3.84±1.49% – 6.66±1.76%). An analysis time of only 1 minute was obtained and no interferences from the matrices were observed. Statistical analysis (Pearson correlation test) showed a moderate correlation (R = 0.5061, p = 0.0099) between serum and saliva concentrations (N = 25). The possibility of measuring salivary concentrations of malondialdehyde extents the applications of oxidative stress/lipid peroxidation estimations to categories of population unreachable before (pregnant women, small children, etc); repeated sample studies are also easier to make.
Enikő Nemes-Nagy, Zita Fazakas, Victor Balogh-Sămărghițan, Zsuzsánna Simon-Szabó, Lóránd Dénes, Cosmina Cristina Uzun, Márta Andrea Fodor, Mariana Cornelia Tilinca, Deborah Reid and Trefor Higgins
This parameter’s results accuracy has a special importance in the management of diabetic patients since targets for optimal glycemic control are established using HbA1c values. Several error sources can influence the obtained value, some of them can be counteracted (ex. pipetting errors, storage), and others should be taken into consideration at the interpretation of the result (ex. presence of hemoglobin variants). The aim of this study was to compare four chromatographic methods regarding the costs and the influence of certain error sources on the accuracy of the result. Materials and methods: Samples and controls were analyzed using Variant I, Micromat II and In2it (Bio-Rad) systems, and the BIOMIDI reagent kit for HbA1c measurement. Results: Positive correlation could be observed comparing the results obtained using different methods, except the patients presenting elevated HbF. Pipetting errors modify the results up to 5% in case of Variant I, and up to 10% in case of Micromat II in the tested range. One day of improper storage at room temperature causes 3% deviation from the actual value using the Variant I analyzer and 5% in case of Micromat II and In2it equipment. As a conclusion, depending on the number of samples, automated chromatographic analyzers are the most appropriate equipments for the determination of HbA1c.