Ana Maneva

ORCID: 0000-0002-1982-9420
Publications
Citations
Views
---
Saved
---
About
Contact & Profiles
Research Areas
  • Neonatal Health and Biochemistry
  • Infant Nutrition and Health
  • Iron Metabolism and Disorders
  • Immunodeficiency and Autoimmune Disorders
  • Erythrocyte Function and Pathophysiology
  • Pancreatic function and diabetes
  • Rheumatoid Arthritis Research and Therapies
  • Oral Health Pathology and Treatment
  • Cancer-related Molecular Pathways
  • Atherosclerosis and Cardiovascular Diseases
  • Calcium signaling and nucleotide metabolism
  • Trace Elements in Health
  • Oral microbiology and periodontitis research
  • Adenosine and Purinergic Signaling
  • Pediatric Hepatobiliary Diseases and Treatments
  • Monoclonal and Polyclonal Antibodies Research
  • Thyroid Disorders and Treatments
  • Advanced Glycation End Products research
  • Neonatal Respiratory Health Research
  • Blood disorders and treatments
  • Inflammatory mediators and NSAID effects
  • Melanoma and MAPK Pathways
  • Hyperglycemia and glycemic control in critically ill and hospitalized patients
  • Chemical Analysis and Environmental Impact
  • Hedgehog Signaling Pathway Studies

Medical University Plovdiv
2016-2024

Medical University of Sofia
1993-2015

Military Medical Academy
1983

Rheumatoid arthritis (RA) is the most common inflammatory joint disease. Various proinflammatory cytokines are involved in pathogenesis of this chronic disorder. It characterized by presence autoantibodies, such as rheumatoid factor and antibodies against citrullinated peptides. The present study focuses on investigation possible association between cytokine interleukin 17 anti-CCP, anti-MCV, anti-CarP seropositivity RA patients.To assess serum levels (IL-17) patients with healthy controls...

10.3897/folmed.65.e72448 article EN cc-by Folia Medica 2023-02-28

Binding of lactoferrin (Lf) to its membrane receptors requires an electron for the reduction Fe 3+ LF 2+ LF. It is possible that glyceraldehyde D3-phosphate dehydrogenase, a glycolytic enzyme part erythrocyte membrane, delivers electron. Then Lf, obtaining from coenzyme NADH, might stimulate glycolysis, which oxidised state NAD + . Such possibility supported by finding another extracellular e - acceptor potassium ferricyanide activates glycolysis similar mechanism. Present results show...

10.1515/znc-2003-3-420 article EN cc-by-nc-nd Zeitschrift für Naturforschung C 2003-04-01

10.1016/0020-711x(83)90179-9 article EN International Journal of Biochemistry 1983-01-01

To find the correlations between parameters of iron homeostasis, inflammatory activity and autoimmune disorders in rheumatoid arthritis (RA).The present study included 114 patients with RA 42 healthy controls. We determined homeostasis: serum iron, total binding capacity (TIBC), ferritin soluble transferrin receptor (sTfR), activity: C-reactive protein (CRP), interleukin-6 (IL-6) prohepcidin, disorders: factor (RF), anti-cyclic citrullinated peptide (antiCCP) antibodies DAS 28.The levels...

10.1515/folmed-2017-0068 article EN Folia Medica 2018-03-01

Background and objectives: Lectin-like oxidized low density lipoprotein receptor-1 (LOX-1) has been recognized as the primary receptor for carbamylated low-density lipoproteins (cLDL) is increasingly being viewed a critical mediator of vascular inflammation atherosclerosis. The aim current study was to evaluate possible role circulating cLDL soluble LOX-1 (sLOX-1) potential biomarkers metabolic syndrome (MetS) well coronary artery disease (CAD) among MetS patients. Materials Methods: serum...

10.3390/medicina55080493 article EN cc-by Medicina 2019-08-15

Objective: This study highlights the relationship between some eating habits and iron status during pregnancy.Subjects: The included 219 healthy pregnant women aged 27.6 ± 5.7 years from southern Bulgaria.Methods: Subjects' was assessed on basis of following indicators: hemoglobin (Hb), serum ferritin (SF), transferrin receptor (sTfR), body index (mg/kg).Results: Severe anemia among Bulgaria not observed. Advanced pregnancy are factors that deteriorate status. Women who had consumed fish at...

10.1080/07315724.2015.1014946 article EN Journal of the American College of Nutrition 2015-08-11

Carbamylated low-density lipoprotein (cLDL) has profound proatherogenic properties. Lectin-like oxidized receptor-1 (LOX-1) been identified as the primary cLDL receptor. The soluble form of LOX-1 (sLOX-1) and 3-nitrotyrosine (NT) have recently suggested biomarkers vascular disease. Although type 2 diabetes mellitus (T2DM) is characterised by an increased atherosclerotic risk, clinical data on cLDL, NT sLOX-1 levels in T2DM are limited.To explore possible role potential for disease...

10.3897/folmed.61.e39343 article EN cc-by Folia Medica 2019-09-30

10.1016/0020-711x(93)90357-k article EN International Journal of Biochemistry 1993-05-01

To find correlations between high thiocyanate and nitrate levels low selenium the indicators of iodine iron status postpartum women.The study included 41 mothers aged 26.4±5.9 yrs from Asenovgrad nearby villages. Urinary was determined by Sandell-Kolthoff reaction - interaction these ions with acidic solution KMnO4; for serum nitrates we used colorimetric method; assessed electro-thermal atomic-absorption spectrophotometry; thyroxin (FT4), thyroid stimulating hormone (TSH), ferritin (SF),...

10.1515/folmed-2016-0024 article EN Folia Medica 2016-09-01

To find the correlations between parameters of iron homeostasis, inflammatory activity and autoimmune disorders in rheumatoid arthritis (RA).The present study included 114 patients with RA 42 healthy controls. We determined homeostasis: serum iron, total binding capacity (TIBC), ferritin soluble transferrin receptor (sTfR), activity: C-reactive protein (CRP), interleukin-6 (IL-6) prohepcidin, disorders: factor (RF), anti-cyclic citrullinated peptide (antiCCP) antibodies, DAS 28.The levels...

10.1515/folmed-2016-0040 article EN Folia Medica 2016-12-01

Introduction: TNF-α blocker therapy is part of the treatment with biologics used in management inflammatory joint diseases. In recent years, drug-induced neutralizing antibodies have been shown to a negative effect on course disease process. Aim: To investigate against blocking drugs patients diseases and their clinical disease. Materials methods: The study included 121 (56.8%) rheumatoid arthritis, 50 (23.5%) ankylosing spondylitis, 42 (19.7%) psoriatic 31 sex age-matched healthy...

10.3897/folmed.62.e39402 article EN cc-by Folia Medica 2020-06-30

The aim of the present study was to assess if some flavonic compounds (quercetin, piceatannol and apigenin) ascorbic acid could interfere with Lf stimulatory effect on erythrocyte function. Quercetin (1.5 μm) (30 showed an additive stimulation Na + /K -ATPase when used together Lf. enhancement in presence flavonoids probably due their antioxidative properties and/or involvement signaling. None estimated lactate production. itself enhanced ATPase activity but did not affect formation....

10.1515/znc-2008-9-1025 article EN cc-by-nc-nd Zeitschrift für Naturforschung C 2008-10-01

The kinetics of 59FeTf binding to the neutrophil membrane receptors was evaluated. Results showed that polymorphonuclear leucocytes (PMN) possess not only for lactoferrin, but also transferrin. Receptor experiments biphasic patterns with two peaks saturation: 16% and 30% specific cell receptors. Scatchards analysis evaluated types sites: One—with high affinity low capacity: Ka1 = 9.88 × 108 M−1and 40 300 receptors/cell, (y1 9.92 - 0.182.x, n=2, r= -1, p<0.001), second—with Ka2 12.54 109 M−1...

10.1080/13102818.2009.10818467 article EN Biotechnology & Biotechnological Equipment 2009-01-01

We studied the effect of some modulators signal transduction on erythrocyte Na+/ K+-ATPase. Go6976 and Go6983 (protein kinase C inhibitors) showed a stimulatory calyculin A phosphatase inhibitor) exerted an inhibitory Na pump activity. Some tested cell-signaling [protein phosphatase(s), phosphodiesterase, calmodulin protein kinases] interfered with lactoferrin (Lf) sodium pump. Lf itself was able to modulate agents upon Moreover, additive stimulation found when were used simultaneously. The...

10.1515/znc-2007-11-1219 article EN cc-by-nc-nd Zeitschrift für Naturforschung C 2007-12-01

Thioredoxin (Trx) and lactoferrin (Lf) are multifunctional proteins that part of the body's antioxidant defence counteract oxidative tissue damage. Our study aims to investigate Trx LF levels in serum rheumatoid arthritis (RA) patients establish association these with factor (RF) other disease markers. The included 114 RA 42 healthy subjects. Serum concentrations 1, LF, RF, anti-cyclic citrullinated peptide (anti-CCP) antibodies, Creactive protein (CRP), IL-6 were determined using...

10.5937/jomb0-44758 article EN cc-by Journal of Medical Biochemistry 2024-12-07

Cyclic AMP is a powerful inhibitor of platelet aggregation. In the present study we examined effect aggregation modulators on cyclic content in human thrombocytes. Of agents tested, lactoferrin, wortmannin, quercetin and amiloride are inhibitors, whereas ouabain activator.To investigate quercetin, applied alone combination with lactoferrin production platelets.'Direct cAMP ELISA kit' was used for determination.The studied modulators, individually or combination, stimulate...

10.1515/folmed-2017-0091 article EN Folia Medica 2018-06-01

Purpose: Pregnancy is often complicated by iron deficiency, affecting negatively thyroid gland physiology. The aim of our study to investigate parameters and status during І, ІІ ІІІ trimester pregnancy in order establish potential correlations their dynamics. Materials methods: involved 61 pregnant women 43 controls. Their was determined measuring hemoglobin (Hb), serum ferritin (SF), transferrin receptor (sTfR), thyroxine (FT4) thyroid-stimulating hormone (TSH). Results: Significant...

10.5272/jimab.2022281.4194 article EN cc-by-sa Journal of IMAB - Annual Proceeding (Scientific Papers) 2022-01-20

The aim of the present study was to test ability Lf participate in cell signals involved glycolysis control. We tested Lf's effect on lactate generation presence some modulators protein phosphorylation (protein kinase and phosphatase inhibitors) ion transport (calmodulin, W-7, amiloride ouabain). Statistically reliable decrease stimulatory found wortmannin (with 45%, p<0.001), caffeine 18%, p<0.05), calmodulin (CaM) 22%, p<0.005), ouabain 42% 35%, resp., p<0.001). a CaM antagonist, enhanced...

10.1080/13102818.2009.10818472 article EN Biotechnology & Biotechnological Equipment 2009-01-01

Understanding cancer biology is crucial to the successful diagnosis and application of personalized therapies. Skin carcinogenesis a multi-step process. The first step development potentially malignant disorders (PMDs) known as leukoplakia, erytroplakia, lichen planus, probably trough mutation in proteins regulated cell cycle (p16INK4A, p21Waf1/Cip1/Sdi1, p27 kip1, Cyclin D1) and, second p53 (TP53), Ras, hTert, EGFR, will reverse benign phenotype late precancer lesions into lesion. Third...

10.15520/ijcrr/2018/9/02/436 article EN cc-by International Journal of Contemporary Research and Review 2018-02-26
Coming Soon ...