Medical University of Varna

About: Medical University of Varna is a education organization based out in Varna, Varna, Bulgaria. It is known for research contribution in the topics: Population & Medicine. The organization has 1199 authors who have published 1273 publications receiving 32940 citations. The organization is also known as: MU-Varna & Higher Medical Institute of Varna.

Metabolomic analysis in ophthalmology.

Abstract: Modern science takes into account phenotype complexity and establishes approaches to track changes on every possible level. Many "omics" studies have been developed over the last decade. Metabolomic analysis enables dynamic measurement of the metabolic response of a living system to a variety of stimuli or genetic modifications. Important targets of metabolomics is biomarker development and translation to the clinic for personalized diagnosis and a greater understanding of disease pathogenesis. The current review highlights the major aspects of metabolomic analysis and its applications for the identification of relevant predictive, diagnostic and prognostic biomarkers for some ocular diseases including dry eye, keratoconus, retinal diseases, macular degeneration, and glaucoma. To date, possible biomarker candidates for dry eye disease are lipid metabolites and androgens, for keratoconus cytokeratins, urea, citrate cycle, and oxidative stress metabolites. Palmitoylcarnitine, sphingolipids, vitamin D related metabolites, and steroid precursors may be used for distinguishing glaucoma patients from healthy controls. Dysregulation of amino acid and carnitine metabolism is critical in the development and progression of diabetic retinopathy. Further work is needed to discover and validate metabolic biomarkers as a powerful tool for understanding the molecular mechanisms of ocular diseases, to provide knowledge on their etiology and pathophysiology and opportunities for personalized clinical intervention at an early stage.

Implication of "Down syndrome cell adhesion molecule" in the hippocampal neurogenesis of ischemic monkeys.

Abstract: Molecular signals regulating adult neurogenesis in primates are largely unknown. Here the authors used differential display to analyze gene expression changes that occur in dentate gyrus of adult monkeys after transient global cerebral ischemia. Among 14 genes upregulated, the authors focused on Down syndrome cell adhesion molecule (DSCAM) known to play crucial role during neuronal development, and characterized its expression pattern at the protein level. In contrast with approximately threefold upregulation of Dscam gene on days 5 and 7, immunoblotting and immunofluorescence analyses using specific antibodies showed a gradual decrease of DSCAM after ischemia until day 9 followed by recovery on day 15. In the control, immunofluorescence reactivity of DSCAM was detected in dentate gyrus granule cells and CA4 neurons but decreased after ischemia, being compatible with the immunoblotting data. However, in the subgranular zone, cerebral ischemia led to a marked increase of DSCAM-positive cells on days 9 and 15. DSCAM upregulation was seen in two cell types: one is immature neurons positive for polysialylated neural cell adhesion molecule or βIII-tubulin, while another is astrocytes positive for S100β. Young astrocytes were in intimate contact with newly generated neurons in the subgranular zone. These data suggest implication of DSCAM in the adult neurogenesis of primate hippocampus upregulated after ischemia. © 2006 Wiley-Liss, Inc.

Mortality in childhood-onset type 1 diabetes

Abstract: It is well-recognized that diabetes-related complications are the leading cause of the still increased morbidity and mortality from diabetes and exert a heavy economic burden on society. The discovery of insulin led to a dramatic change in life expectancy of patients with type 1 diabetes (T1D). Furthermore, it caused a major shift in the distribution of causes of death - from diabetic coma in the pre-insulin era, to long-term complications being the predominant causes of death nowadays. The aim of the present review is to assess the trends in the absolute and the relative mortality rates as well as the leading causes of death among patients with childhood-onset (< 18 years) T1D in populations from different latitudes. It is also observed how disease duration, age at diagnosis, and year of diagnosis affect these mortality trends. Eight population-based studies published in English in the last 14 years, as well as another one, published in 2001, with different duration of follow-up, are included in the review. However, it is hard to compare different populations due to the dissimilarities in the study methods and the characteristics of the examined cohorts.

Natural Lipids as Structural Components of Solid Lipid Nanoparticles and Nanostructured Lipid Carriers for Topical Delivery.

Abstract: Background Solid lipid nanoparticles (SLN) and nanostructured lipid carriers (NLC) are useful drug delivery systems for dermal application. Thanks to their biocompatible and biodegradable profile, these carriers offer many advantages such as enhanced bioavailability, low toxicity, viable drug targeting and controlled release. SLN and NLC are composed of well-tolerated lipids, including natural fats and oils that are successfully used in the pharmaceutical and cosmetic dermal formulation. Objective This article presents an overview of the benefits of selecting natural fats and oils as structural components of SLN and NLC for topical application. Methods This review is based on data published over the past 20 years about the development of stable and nontoxic lipid nanoparticles with natural lipids. We shed light on the role of natural fats in skin restoration, as well as on the contributed penetration and occlusive properties of SLN and NLC. Results The deliberate selection of excipients (type and lipid ratio) influences the quality of the final dermal formulation. Natural lipids show good compatibility with different active molecules and are able to create stable lipid matrices that facilitate the biopharmaceutical properties of lipid nanoparticles. Patents involving natural fats and oils in SLN and NLC composition are listed, yet it is important to note that the approved marketed formulations are mainly cosmetic, not pharmaceutical, products. Conclusion Natural lipids can enhance topical drug delivery by adding their ability of improving skin penetration and hydration to the permeation and occlusion properties of SLN and NLC.

3D-printing in contemporary prosthodontic treatment

Abstract: The purpose of the present paper is to make a review of the applications for 3D-printing in contemporary prosthetic treatment as this modern technology has become widely spread not only in the industry but in medicine and dentistry, too. It is a form of additive manufacturing technology where a three-dimensional object is created by laying down successive layers of material.