Search Results

You are looking at 1 - 3 of 3 items for

  • Author: Margarita L. Alexandrova x
Clear All Modify Search
Open access

Maya P. Danovska, Margarita L. Alexandrova and Irena I. Gencheva

Summary

Individuals with hypertension and diabetes mellitus are at high risk of cerebrovascular and cardiovascular morbidity and mortality. Recent advances in the multifactorial pathophysiology of atherogenesis provide important information about the complex interrelations between traditional risk factors, inflammation and oxidative stress in mediating all stages of atherosclerosis. The objective of the study was to determine if some inflammatory and oxidative stress markers in patients with arterial hypertension and diabetes mellitus differ from those in healthy age-matched controls. Our results revealed a significant difference in blood pro/antioxidant activities in hypertensive diabetics and the controls. The investigation of inflammatory and oxidative stress markers along with traditional risk factors proves useful in complex assessment of vascular risk and primary prophylaxis of cerebrovascular and cardiovascular events.

Open access

Lachezar H. Bogdanov, Margarita L. Alexandrova, Milena A. Atanasova and Nikolay Tz. Tzvetkov

Summary

Immune thrombocytopenia (ІTP) is one of the most common causes of clinically overt hemorrhage. Despite the progress made in recent years in clarifying the pathogenesis of the disease, the exact unlockmechanisms still remain unclear. The aim of the study was to correlate the oxidative stress markers and the severity of immune thrombocytopenia in adults and to investigate their predictive value of transforming the acute formof ITPinto chronicІTP.We studiedatotal of 58 subjects (14 patients with newly diagnosedІTP, 13 patients with chronic form ofІTR, and 31 controls). The plasma levels of human pantetheinase ( vanin-1) and lipid hydroperoxides were measured using commercial assay kits.We found that the form of the disease was not significantly related to the plasma vanin-1 levels (p=0.120). Asignificant difference in the vanin-1concentrations was observed between newly diagnosed IPTand the controls (p=0.046). Further studies with larger and more homogenous groups of patients and including more indicators of oxidative stress are needed to be able to draw statistically valid conclusions about the role of oxidative biomarkers in diagnosing and treatment ofІTP.

Open access

Vanya S. Popova, Svetla O. Blajeva, Margarita L. Alexandrova, Tsvetan H. Lukanov, Silvia Y. Naneva and Nikolay T. Tzvetkov

Summary

Chronic lymphocytic leukemia is one of the most common types of leukemia in adults. It belongs to the group of indolent lymphoproliferative disorders and has a slow clinical course. Approximately 50% of newly diagnosed patients do not require treatment for years. A better understanding of the pathophysiology of the disease has led to the development of models for assessment of the risk.

Our study aimed to evaluate the prognostic significance of the serum marker beta-2 microglobulin (82M) and the flow cytometric marker CD49d in patients with early-stage of B-chronic lymphocytic leukemia (B-CLL) as well as look for a correlation between CD 49d and the early stages of the disease. For this purpose, analysis of 30 untreated patients with known and newly diagnosed B-CLL was carried out. The following methods were used: documentary, flow cytometric analysis of peripheral blood, Rai staging system and chi-square test of independence (Fisher’s Exact Test). The results from our study showed that a small number of patients in the early stage of the disease have high levels of CD49d expression and beta-2 microglobulins. In eight of 29 patients, the flow cytometric marker was higher than 30%, and in ten out of 29 patients, the B2M was above the reference range. No significant correlation between the two markers in early stage B-CLL patients was found.