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Georgieva E, Ananiev J, Yovchev Y, Arabadzhiev G, Abrashev H, Abrasheva D, Atanasov V, Kostandieva R, Mitev M, Petkova-Parlapanska K, Karamalakova Y, Koleva-Korkelia I, Tsoneva V, Nikolova G. COVID-19 Complications: Oxidative Stress, Inflammation, and Mitochondrial and Endothelial Dysfunction. Int J Mol Sci 2023; 24:14876. [PMID: 37834324 PMCID: PMC10573237 DOI: 10.3390/ijms241914876] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Revised: 09/28/2023] [Accepted: 09/28/2023] [Indexed: 10/15/2023] Open
Abstract
SARS-CoV-2 infection, discovered and isolated in Wuhan City, Hubei Province, China, causes acute atypical respiratory symptoms and has led to profound changes in our lives. COVID-19 is characterized by a wide range of complications, which include pulmonary embolism, thromboembolism and arterial clot formation, arrhythmias, cardiomyopathy, multiorgan failure, and more. The disease has caused a worldwide pandemic, and despite various measures such as social distancing, various preventive strategies, and therapeutic approaches, and the creation of vaccines, the novel coronavirus infection (COVID-19) still hides many mysteries for the scientific community. Oxidative stress has been suggested to play an essential role in the pathogenesis of COVID-19, and determining free radical levels in patients with coronavirus infection may provide an insight into disease severity. The generation of abnormal levels of oxidants under a COVID-19-induced cytokine storm causes the irreversible oxidation of a wide range of macromolecules and subsequent damage to cells, tissues, and organs. Clinical studies have shown that oxidative stress initiates endothelial damage, which increases the risk of complications in COVID-19 and post-COVID-19 or long-COVID-19 cases. This review describes the role of oxidative stress and free radicals in the mediation of COVID-19-induced mitochondrial and endothelial dysfunction.
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Affiliation(s)
- Ekaterina Georgieva
- Department of General and Clinical Pathology, Forensic Medicine, Deontology and Dermatovenerology, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria;
| | - Julian Ananiev
- Department of General and Clinical Pathology, Forensic Medicine, Deontology and Dermatovenerology, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria;
| | - Yovcho Yovchev
- Department of Surgery and Anesthesiology, University Hospital “Prof. Dr. St. Kirkovich”, 6000 Stara Zagora, Bulgaria; (Y.Y.); (G.A.)
| | - Georgi Arabadzhiev
- Department of Surgery and Anesthesiology, University Hospital “Prof. Dr. St. Kirkovich”, 6000 Stara Zagora, Bulgaria; (Y.Y.); (G.A.)
| | - Hristo Abrashev
- Department of Vascular Surgery, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria;
| | - Despina Abrasheva
- II Department of Internal Medicine Therapy: Cardiology, Rheumatology, Hematology and Gastroenterology, Medical Faculty, Trakia University, 6000 Stara Zagora, Bulgaria;
| | - Vasil Atanasov
- Forensic Toxicology Laboratory, Military Medical Academy, 3 G. Sofiiski, 1606 Sofia, Bulgaria; (V.A.); (R.K.)
| | - Rositsa Kostandieva
- Forensic Toxicology Laboratory, Military Medical Academy, 3 G. Sofiiski, 1606 Sofia, Bulgaria; (V.A.); (R.K.)
| | - Mitko Mitev
- Department of Diagnostic Imaging, University Hospital “Prof. Dr. St. Kirkovich”, 6000 Stara Zagora, Bulgaria;
| | - Kamelia Petkova-Parlapanska
- Department of Medical Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria; (K.P.-P.); (Y.K.)
| | - Yanka Karamalakova
- Department of Medical Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria; (K.P.-P.); (Y.K.)
| | - Iliana Koleva-Korkelia
- Department of Obstetrics and Gynaecology Clinic, University Hospital “Prof. St. Kirkovich”, 6000 Stara Zagora, Bulgaria;
| | - Vanya Tsoneva
- Department of Propaedeutics of Internal Medicine and Clinical Laboratory, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria;
| | - Galina Nikolova
- Department of Medical Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria; (K.P.-P.); (Y.K.)
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Georgiev T, Nikolova G, Dyakova V, Karamalakova Y, Georgieva E, Ananiev J, Ivanov V, Hadzhibozheva P. Vitamin E and Silymarin Reduce Oxidative Tissue Damage during Gentamycin-Induced Nephrotoxicity. Pharmaceuticals (Basel) 2023; 16:1365. [PMID: 37895836 PMCID: PMC10610356 DOI: 10.3390/ph16101365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 09/20/2023] [Accepted: 09/22/2023] [Indexed: 10/29/2023] Open
Abstract
Aminoglycoside antibiotics and gentamicin (GN), in particular, are still widely used in clinical practice. It is a well-known fact that GN causes nephrotoxicity, and redox disturbances are discussed as a factor in its side effects. Recently, a new type of cell oxidative death, named ferroptosis, was discovered; it is associated with iron accumulation in the cell, glutathione (GSH) depletion and inactivation of glutathione peroxidase-4 (GPX4), reactive oxygen species (ROS) increment with concomitant lipid peroxidation. In this regard, a possible connection between GN-induced renal damage, ferroptosis and the overall antioxidant status of the organism could be investigated. Moreover, due to its beneficial effects, GN is still one of the main choices as a therapeutic agent for several diseases, and the possible reduction of its side effects with the application of certain antioxidants will be of important clinical significance. The study was conducted with adult male white mice divided into several groups (n = 6). GN nephrotoxicity was induced by the administration of GN 100-200 mg/kg i.p. for 10 days. The control group received only saline. The other groups received either Vitamin E (400 mg/kg p.o.) or Silymarin (200 mg/kg p.o.) applied alone or together with GN for the same period. After the end of the study, the animals were sacrificed, and blood and tissue samples were taken for the assessment of biochemical parameters and antioxidant status, as well as routine and specific for GPX4 histochemistry examination. The experimental results indicate that GN-induced nephrotoxicity negatively modulates GPX4 activity and is associated with increased production of ROS and lipid peroxidation. The groups treated with antioxidants demonstrated preserved antioxidant status and better GPX4 activity. In conclusion, the inhibition of ROS production and especially the suppression of ferroptosis, could be of clinical potential and can be applied as a means of reducing the toxic effects of GN application.
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Affiliation(s)
- Tsvetelin Georgiev
- Department of Physiology, Pathophysiology and Pharmacology, Medical Faculty, Trakia University, 6000 Stara Zagora, Bulgaria; (T.G.); (V.D.); (P.H.)
| | - Galina Nikolova
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, 6000 Stara Zagora, Bulgaria;
| | - Viktoriya Dyakova
- Department of Physiology, Pathophysiology and Pharmacology, Medical Faculty, Trakia University, 6000 Stara Zagora, Bulgaria; (T.G.); (V.D.); (P.H.)
| | - Yanka Karamalakova
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, 6000 Stara Zagora, Bulgaria;
| | - Ekaterina Georgieva
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, 6000 Stara Zagora, Bulgaria;
| | - Julian Ananiev
- Department of General and Clinical Pathology, Medical Faculty, Trakia University, 6000 Stara Zagora, Bulgaria;
| | - Veselin Ivanov
- Department of Neurology, Psychiatry and Disaster Medicine, Medical Faculty, Trakia University, 6000 Stara Zagora, Bulgaria;
| | - Petya Hadzhibozheva
- Department of Physiology, Pathophysiology and Pharmacology, Medical Faculty, Trakia University, 6000 Stara Zagora, Bulgaria; (T.G.); (V.D.); (P.H.)
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Goycheva P, Petkova-Parlapanska K, Georgieva E, Karamalakova Y, Nikolova G. Biomarkers of Oxidative Stress in Diabetes Mellitus with Diabetic Nephropathy Complications. Int J Mol Sci 2023; 24:13541. [PMID: 37686346 PMCID: PMC10488183 DOI: 10.3390/ijms241713541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/28/2023] [Accepted: 08/29/2023] [Indexed: 09/10/2023] Open
Abstract
The present study aimed to investigate and compare biomarkers of oxidative stress and the activity of antioxidant enzymes in the plasma of patients with different stages of diabetic nephropathy. For this purpose, we studied (1) the levels of reactive oxygen species and reactive nitrogen species as oxidative stress parameters, (2) lipid and protein oxidation, (3) the activity of antioxidant enzymes, and (4) cytokine production. Patients with type 2 diabetes mellitus were divided into three groups according to the loss of renal function: patients with compensated diabetes mellitus with normal renal function DMT2N0 measured as an estimated glomerular filtration rate (eGFR) ≥ 90 mL/min/1.73 m2, a group with decompensated diabetes mellitus with complication diabetic nephropathy and mild-to-moderate loss of renal function DMT2N1 (eGFR < 60 mL/min/1.73 m2: 59-45 mL/min/1.73 m2), and a decompensated diabetes mellitus with diabetic nephropathy group with moderate-to-severe loss of renal function DMT2N2 (eGFR > 30 mL/min/1.73 m2: 30-44 mL/min/1.73 m2). All results were compared with healthy volunteers. The results showed that patients with diabetic nephropathy had significantly higher levels of ROS, cytokine production, and end products of lipid and protein oxidation compared to healthy volunteers. Furthermore, patients with diabetic nephropathy had depleted levels of nitric oxide (NO), an impaired NO synthase (NOS) system, and reduced antioxidant enzyme activity (p < 0.05). These findings suggest that patients with impaired renal function are unable to compensate for oxidative stress. The decreased levels of NO radicals in patients with advanced renal complications may be attributed to damage NO availability in plasma. The study highlights the compromised oxidative status as a contributing factor to impaired renal function in patients with decompensated type 2 diabetes mellitus. The findings of this study have implications for understanding the pathogenesis of diabetic nephropathy and the role of oxidative stress and chronic inflammation in its development. The assessment of oxidative stress levels and inflammatory biomarkers may aid in the early detection and prediction of diabetic complications.
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Affiliation(s)
- Petya Goycheva
- Propaedeutic of Internal Diseases Department, Medical Faculty, Trakia University Hospital, 6000 Stara Zagora, Bulgaria;
| | - Kamelia Petkova-Parlapanska
- Medical Chemistry and Biochemistry Department, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria; (K.P.-P.); (E.G.)
| | - Ekaterina Georgieva
- Medical Chemistry and Biochemistry Department, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria; (K.P.-P.); (E.G.)
- Department of “General and Clinical Pathology, Forensic Medicine, Deontology and Dermatovenerology”, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria
| | - Yanka Karamalakova
- Medical Chemistry and Biochemistry Department, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria; (K.P.-P.); (E.G.)
| | - Galina Nikolova
- Medical Chemistry and Biochemistry Department, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria; (K.P.-P.); (E.G.)
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Ivanova D, Nikolova G, Karamalakova Y, Semkova S, Marutsova V, Yaneva Z. Water-Soluble Alkali Lignin as a Natural Radical Scavenger and Anticancer Alternative. Int J Mol Sci 2023; 24:12705. [PMID: 37628882 PMCID: PMC10454704 DOI: 10.3390/ijms241612705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 08/09/2023] [Accepted: 08/10/2023] [Indexed: 08/27/2023] Open
Abstract
Several phytochemicals, which display antioxidant activity and inhibit cancer cell phenotypes, could be used for cancer treatment and prevention. Lignin, as a part of plant biomass, is the second most abundant natural biopolymer worldwide, and represents approximately 30% of the total organic carbon content of the biosphere. Historically, lignin-based products have been viewed as waste materials of limited industrial usefulness, but modern technologies highlight the applicability of lignin in a variety of industrial branches, including biomedicine. The aims of our preliminary study were to compare the antioxidant properties of water-soluble alkali lignin solutions, before and after UV-B irradiation, as well as to clarify their effect on colon cancer cell viability (Colon 26), applied at low (tolerable) concentrations. The results showed a high antioxidant capacity of lignin solutions, compared to a water-soluble control antioxidant standard (Trolox) and remarkable radical scavenging activity was observed after their UV-B irradiation. Diminishment of cell viability as well as inhibition of the proliferative activity of the colon cancer cell line with an increase in alkali lignin concentrations were observed. Our results confirmed that, due to its biodegradable and biocompatible nature, lignin could be a potential agent for cancer therapy, especially in nanomedicine as a drug delivery system.
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Affiliation(s)
- Donika Ivanova
- Department of Pharmacology, Animal Physiology, Biochemistry and Chemistry, Faculty of Veterinary Medicine, Trakia University, Student Campus, 6000 Stara Zagora, Bulgaria;
- Department of Medical Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 “Armeyska” St., 6000 Stara Zagora, Bulgaria; (G.N.); (Y.K.)
| | - Galina Nikolova
- Department of Medical Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 “Armeyska” St., 6000 Stara Zagora, Bulgaria; (G.N.); (Y.K.)
| | - Yanka Karamalakova
- Department of Medical Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 “Armeyska” St., 6000 Stara Zagora, Bulgaria; (G.N.); (Y.K.)
| | - Severina Semkova
- Department of Electroinduced and Adhesive Properties, Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, 1040 Sofia, Bulgaria;
| | - Vania Marutsova
- Department of Internal Diseases, Faculty of Veterinary Medicine, Trakia University, Student Campus, 6000 Stara Zagora, Bulgaria;
| | - Zvezdelina Yaneva
- Department of Pharmacology, Animal Physiology, Biochemistry and Chemistry, Faculty of Veterinary Medicine, Trakia University, Student Campus, 6000 Stara Zagora, Bulgaria;
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Georgieva E, Atanasov V, Kostandieva R, Tsoneva V, Mitev M, Arabadzhiev G, Yovchev Y, Karamalakova Y, Nikolova G. Direct Application of 3-Maleimido-PROXYL for Proving Hypoalbuminemia in Cases of SARS-CoV-2 Infection: The Potential Diagnostic Method of Determining Albumin Instability and Oxidized Protein Level in Severe COVID-19. Int J Mol Sci 2023; 24:ijms24065807. [PMID: 36982882 PMCID: PMC10058219 DOI: 10.3390/ijms24065807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/15/2023] [Accepted: 03/16/2023] [Indexed: 03/30/2023] Open
Abstract
Oxidative stress and the albumin oxidized form can lead to hypoalbuminemia, which is a predisposing factor for reduced treatment effectiveness and an increased mortality rate in severe COVID-19 patients. The aim of the study is to evaluate the application of free radical 3-Maleimido-PROXYL and SDSL-EPR spectroscopy in the in vitro determination of ox/red HSA in serum samples from patients with SARS-CoV-2 infection. Venous blood was collected from patients intubated (pO2 < 90%) with a positive PCR test for SARS-CoV-2 and controls. At the 120th minute after the incubation of the serum samples from both groups with the 3-Maleimido-PROXYL, the EPR measurement was started. The high levels of free radicals were determined through the nitroxide radical TEMPOL, which probably led to increased oxidation of HSA and hypoalbuminemia in severe COVID-19. The double-integrated spectra of 3-Maleimido-PROXYL radical showed a low degree of connectivity due to high levels of oxidized albumin in COVID-19 patients. The low concentrations of reduced albumin in serum samples partially inhibit spin-label rotation, with Amax values and ΔH0 spectral parameters comparable to those of 3-Maleimido-PROXYL/DMSO. Based on the obtained results, we suggest that the stable nitroxide radical 3-Maleimido-PROXYL can be successfully used as a marker to study oxidized albumin levels in COVID-19.
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Affiliation(s)
- Ekaterina Georgieva
- Department of "General and Clinical Pathology, Forensic Medicine, Deontology and Dermatovenerology", Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria
- Department of "Medical Chemistry and Biochemistry", Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria
| | - Vasil Atanasov
- Forensic Toxicology Laboratory, Military Medical Academy, 3 G. Sofiiski, 1606 Sofia, Bulgaria
| | - Rositsa Kostandieva
- Forensic Toxicology Laboratory, Military Medical Academy, 3 G. Sofiiski, 1606 Sofia, Bulgaria
| | - Vanya Tsoneva
- Department of Propaedeutics of Internal Medicine and Clinical Laboratory, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria
| | - Mitko Mitev
- Department of "Diagnostic Imaging", University Hospital "Prof. Dr. St. Kirkovich", 6000 Stara Zagora, Bulgaria
| | - Georgi Arabadzhiev
- Department of "Surgery and anesthesiology", University Hospital "Prof. Dr. St. Kirkovich", 6000 Stara Zagora, Bulgaria
| | - Yovcho Yovchev
- Department of "Surgery and anesthesiology", University Hospital "Prof. Dr. St. Kirkovich", 6000 Stara Zagora, Bulgaria
| | - Yanka Karamalakova
- Department of "Medical Chemistry and Biochemistry", Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria
| | - Galina Nikolova
- Department of "Medical Chemistry and Biochemistry", Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria
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Georgieva E, Karamalakova Y, Arabadzhiev G, Atanasov V, Kostandieva R, Mitev M, Tsoneva V, Yovchev Y, Nikolova G. Site-Directed Spin Labeling EPR Spectroscopy for Determination of Albumin Structural Damage and Hypoalbuminemia in Critical COVID-19. Antioxidants (Basel) 2022; 11:antiox11122311. [PMID: 36552520 PMCID: PMC9774111 DOI: 10.3390/antiox11122311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 11/17/2022] [Accepted: 11/20/2022] [Indexed: 11/24/2022] Open
Abstract
The main factors in the COVID-19 pathology, which can initiate extensive structural changes at the cellular and molecular levels, are the generation of free radicals in abnormal amounts, and oxidative stress. Under "oxidative shock" conditions, the proteins undergo various modifications that affect their function and activity, and as a result distribute malfunctioning protein derivatives in the body. Human serum albumin is a small globular protein characterized by a high overall binding capacity for neutral lipophilic and acidic dosage forms. The albumin concentration is crucial for the maintenance of plasma oncotic pressure, the transport of nutrients, amino acids, and drugs, the effectiveness of drug therapy, and the prevention of drug toxicity. Hypoalbuminemia and structural defects molecule in the protein suggest a risk of changed metabolism and increased plasma concentration of unbound drugs. Therefore, the albumin structural and functional changes accompanied by low protein levels can be a serious prerequisite for ineffective therapy, frequent complications, and high mortality in patients with SARS-CoV-2 infection. The current opinion aims the research community the application of Site-Directed Spin Labeling Electron Paramagnetic Resonance spectroscopy (SDSL-EPR) and 3-Maleimido-PROXYL radical in determining abnormalities of the albumin dynamics and protein concentrations in COVID-19 critical patients.
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Affiliation(s)
- Ekaterina Georgieva
- Department of “General and Clinical Pathology, Forensic Medicine, Deontology and Dermatovenerology”, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria
- Department of “Medical Chemistry and Biochemistry”, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria
| | - Yanka Karamalakova
- Department of “Medical Chemistry and Biochemistry”, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria
| | - Georgi Arabadzhiev
- Department of “Surgery and Anesthesiology”, University Hospital “Prof. Dr. St. Kirkovich”, 6000 Stara Zagora, Bulgaria
| | - Vasil Atanasov
- Forensic Toxicology Laboratory, Military Medical Academy, 3 “Sv. Georgi Sofiiski Str.”, 1606 Sofia, Bulgaria
| | - Rositsa Kostandieva
- Forensic Toxicology Laboratory, Military Medical Academy, 3 “Sv. Georgi Sofiiski Str.”, 1606 Sofia, Bulgaria
| | - Mitko Mitev
- Department of “Diagnostic Imaging”, University Hospital “Prof. Dr. St. Kirkovich”, 6000 Stara Zagora, Bulgaria
| | - Vanya Tsoneva
- Department of Propaedeutics of Internal Medicine and Clinical Laboratory, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria
| | - Yovcho Yovchev
- Department of “Surgery and Anesthesiology”, University Hospital “Prof. Dr. St. Kirkovich”, 6000 Stara Zagora, Bulgaria
| | - Galina Nikolova
- Department of “Medical Chemistry and Biochemistry”, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria
- Correspondence: ; Tel.: +359-897771301
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Georgiev T, Hadzhibozheva P, Karamalakova Y, Georgieva E, Perinkadakatt F, Ilinov Z, Petkov K, Ananiev J. Therapeutic approach of glutathione/glutathione peroxidase-4 axis modulation in the light of ferroptosis. PHAR 2022. [DOI: 10.3897/pharmacia.69.e87716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
In the 21st century beginning, the evidence of a new type of programmed cell death, different from apoptosis, began to accumulate. In 2012, the ferroptosis concept was officially introduced. It refers to a kind of cell death that is associated with iron accumulation in the cell, impaired redox potential, and ROS increment with concomitant lipid peroxidation. Ferroptosis plays an important role in the pathophysiology of several organ damages such as tumors, neurodegenerative, ischemia-reperfusion, inflammatory diseases, and others. In ferroptosis, the leading mechanism is the glutathione (GSH) depletion and inactivation of Glutathione peroxidase-4 (GPX4), which strongly shifts the oxidative balance in the cell, leading to the activation of certain signalling pathways to induce oxidative death. The article aims to focus attention on the modulation of the GSH/GPX axis as a key factor in the treatment of these diseases.
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Georgieva E, Benkova K, Vlaeva N, Karamalakova Y, Miteva R, Abrashev H, Nikolova G. Is Illicit Substance Use Gender-Specific? The Basic Points of Mental and Health Disorders. Toxics 2022; 10:toxics10070344. [PMID: 35878250 PMCID: PMC9323370 DOI: 10.3390/toxics10070344] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 06/15/2022] [Accepted: 06/20/2022] [Indexed: 12/20/2022]
Abstract
Among the groups of users of illicit substances, a high percentage are persons deprived of their liberty; at the same time, each social and age group is also affected, to one degree or another. The purpose of this study is to provide general data on the relationship between different psychostimulants, clinical and socio-demographic studies, and gender, both among the general population and in one of the most at-risk groups. This review identifies the use of illicit substances as gender-specific in the general population. A detailed study of the causal relationship between the use of illicit substances and gender was carried out. Electronic databases Academic Search Complete, PubMed, HealthCare, Web of Science, and Google Scholar were searched for relevant studies up to 2022 associated with drug abuse and mental and health disorders. The analysis indicated that the human population showed significant differences between the sex of the consumer as to the type of drug consumers, development of addiction, and relapse. We focus on the pathological changes caused by drug use, the personal and physiological individual traits that influence drug choice, and the extent of use in one of the most affected groups of individuals. The study may provide some guidance in developing gender-specific treatment and prevention, including response to some pharmacological and behavioral therapies. The review is intended for a wide audience of social workers, toxicologists, and pharmacologists.
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Affiliation(s)
- Ekaterina Georgieva
- Department of General and Clinical Pathology, Forensic Medicine, Deontology and Dermatovenerology, Faculty of Medicine, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria; (E.G.); (R.M.)
- Department of Medical Psychology, Social Activities and Foreign Languages, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria; (K.B.); (N.V.)
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria;
| | - Krasimira Benkova
- Department of Medical Psychology, Social Activities and Foreign Languages, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria; (K.B.); (N.V.)
| | - Nadya Vlaeva
- Department of Medical Psychology, Social Activities and Foreign Languages, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria; (K.B.); (N.V.)
| | - Yanka Karamalakova
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria;
| | - Radostina Miteva
- Department of General and Clinical Pathology, Forensic Medicine, Deontology and Dermatovenerology, Faculty of Medicine, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria; (E.G.); (R.M.)
| | - Hristo Abrashev
- Department of Vascular Surgery, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria;
| | - Galina Nikolova
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria;
- Correspondence: ; Tel.: +359-897-771-301
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Karamalakova Y, Stefanov I, Georgieva E, Nikolova G. Pulmonary Protein Oxidation and Oxidative Stress Modulation by Lemna minor L. in Progressive Bleomycin-Induced Idiopathic Pulmonary Fibrosis. Antioxidants (Basel) 2022; 11:antiox11030523. [PMID: 35326173 PMCID: PMC8944767 DOI: 10.3390/antiox11030523] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 03/04/2022] [Accepted: 03/06/2022] [Indexed: 12/23/2022] Open
Abstract
Bleomycin (BLM) administration is associated with multifunctional proteins inflammations and induction of idiopathic pulmonary fibrosis (IPF). Lemna minor L. extract, a free-floating monocot macrophyte possesses antioxidant and anti-inflammatory potential. The aim of the study was to examine the protective effect of L. minor extract on lung protein oxidation and oxidative stress modulation by BLM-induced pulmonary fibrosis in Balb/c mice. For this purpose, the protein carbonyl content, advanced glycation end product, nitroxide protein oxidation (5-MSL), and lipid peroxidation (as MDA and ROS), in lung cells were examined. The histological examinations, collagen deposition, and quantitative measurements of IL-1β, IL-6, and TNF in lung tissues and blood were investigated. Intraperitoneal, BLM administration (0.069 U/mL; 0.29 U/kg b.w.) for 33 days, caused IPF induction in Balb/c mice. Pulmonary combining therapy was administered with L. minor at dose 120 mg/mL (0.187 mg/kg b.w.). L. minor histologically ameliorated BLM induced IPF in lung tissues. L. minor significantly modulated (p < 0.05) BLM-alterations induced in lung hydroxyproline, carbonylated proteins, 5-MSL-protein oxidation. Oxidative stress decreased levels in antioxidant enzymatic and non-enzymatic systems in the lung were significantly regulated (p < 0.05) by L. minor. L. minor decreased the IL-1β, IL-6, and TNF-α expression in lung tissues and plasma. The L. minor improves the preventive effect/defense response in specific pulmonary protein oxidation, lipid peroxidation, ROS identifications, and cytokine modulation by BLM-induced chronic inflammations, and could be a good antioxidant, anti-inflammatory, and anti-fibrotic alternative or IPF prevention involved in their pathogenesis.
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Affiliation(s)
- Yanka Karamalakova
- Department of Medical Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria; (Y.K.); (E.G.)
| | - Ivaylo Stefanov
- Department of Anatomy, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria;
| | - Ekaterina Georgieva
- Department of Medical Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria; (Y.K.); (E.G.)
| | - Galina Nikolova
- Department of Medical Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria; (Y.K.); (E.G.)
- Correspondence: ; Tel.: +359-897771301
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Nikolova G, Karamalakova Y, Gadjeva V. Reducing oxidative toxicity of L-dopa in combination with two different antioxidants: an essential oil isolated from Rosa Damascena Mill., and vitamin C. Toxicol Rep 2019; 6:267-271. [PMID: 30984563 PMCID: PMC6444129 DOI: 10.1016/j.toxrep.2019.03.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 03/14/2019] [Accepted: 03/21/2019] [Indexed: 02/08/2023] Open
Abstract
To avoid L-dopa side effects it’s administration is delayed. Natural antioxidants have wide range of medicinal properties. The natural antioxidants might inhibit oxidation and toxin formation. The L-dopa use with antioxidants, may be a necessary approach in modern PD therapy.
Parkinson disease (PD) is a multifactorial disease that takes a leading place among contemporary frequent diseases of the central nervous system (CNS) with not well-established mechanism. One of the most popular and effective therapy for patients with PD is Levodopa (L-dopa), but clinical effect of the drug diminished by motor complications resulting from prolonged treatment. Due to the L-dopa neurotoxic effect in the disease treatment, the L-dopa administration is delayed as long as possible in order to avoid side effects. In addition, combining L-dopa therapy with antioxidants, may decrease side-effects and provide symptomatic relief. The aim of the current research was to explore the possibility to reduce the oxidative stress (OS) induced by the L-dopa after its combining with two different antioxidants an essential oil isolated from Rosa damascena Mill., and vitamin C through experimental model of healthy mice. For this purpose, some oxidative stress indicators were evaluated - the lipid and protein oxidation end products – such as lipid peroxidation products measured as malondialdehyde (MDA) levels, protein carbonyl content (PCC), and advanced glycation end products (AGEs) in blood plasma of the experimental mice. For this purpose, was studied blood isolated from healthy mice after i.p. treatment with L-dopa (100 mg/kg). The groups with combining therapy were pre-treated first with Ascorbic acid (400 mg/kg), Rose oil (400 mg/kg). Statistically significant increased MDA levels, PCC and AGEs were found in the blood L-dopa treated mice compared to the controls, while the same parameters were significantly decreased in group pre-treated with antioxidants compared to the same controls. As a conclusion, the studied antioxidants can protect organisms from induced L-dopa oxidative toxicity and may play a key role in end products protection.
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Affiliation(s)
- Galina Nikolova
- Department of chemistry and biochemistry, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria
| | - Yanka Karamalakova
- Department of chemistry and biochemistry, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria
| | - Veselina Gadjeva
- Department of chemistry and biochemistry, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria
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Karamalakova Y, Nikolova G, Adhikari M, Stoev S, Agarwal P, Gadjeva V, Zhelev Z. Oxidative-protective effects of Tinospora cordifolia extract on plasma and spleen cells after experimental ochratoxicosis. ACTA ACUST UNITED AC 2018. [DOI: 10.1007/s00580-018-2761-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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12
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Zheleva A, Nikolova G, Karamalakova Y, Hristakieva E, Lavcheva R, Gadjeva V. Comparative study on some oxidative stress parameters in blood of vitiligo patients before and after combined therapy. Regul Toxicol Pharmacol 2018; 94:234-239. [DOI: 10.1016/j.yrtph.2018.02.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 02/09/2018] [Accepted: 02/11/2018] [Indexed: 10/18/2022]
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Tanchev S, Dimitrov S, Nikolova G, Karamalakova Y, Ivanova D, Hristova D, Georgieva S, Zheleva A, Petrov V, Gadjeva V. Effect of antigen stimulation on the oxidative stress parameters in sperm of outbred and inbred rabbits. BIOTECHNOL BIOTEC EQ 2017. [DOI: 10.1080/13102818.2017.1323559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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14
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Nikolova G, Karamalakova Y, Kovacheva N, Stanev S, Zheleva A, Gadjeva V. Protective effect of two essential oils isolated from Rosa damascena Mill. and Lavandula angustifolia Mill, and two classic antioxidants against L-dopa oxidative toxicity induced in healthy mice. Regul Toxicol Pharmacol 2016; 81:1-7. [PMID: 27381452 DOI: 10.1016/j.yrtph.2016.06.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 06/29/2016] [Accepted: 06/30/2016] [Indexed: 01/12/2023]
Abstract
Levodopa (L-dopa) is a "gold standard" and most effective symptomatic agent in the Parkinson's disease (PD) treatment. The several treatments have been developed in an attempt to improve PD treatment, but most patients were still levodopa dependent. The issue of toxicity was raised in vitro studies, and suggests that L-dopa can be toxic to dopaminergic neurons, but it is not yet entirely proven. L-dopa prolonged treatment is associated with motor complications and some limitations. Combining the L-dopa therapy with antioxidants can reduce related sideeffects and provide symptomatic relief. The natural antioxidants can be isolated from any plant parts such as seeds, leaves, roots, bark, etc., and their extracts riched in phenols can retard the oxidative degradation of the lipids, proteins and DNA. Thus, study suggests that combination of essential oils (Rose oil and Lavender oil), Vitamin C and Trolox with Ldopa can reduce oxidative toxicity, and may play a key role in ROS/RNS disarm.
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Affiliation(s)
- Galina Nikolova
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria
| | - Yanka Karamalakova
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria
| | - Natasha Kovacheva
- Agricultural Academy, Institute of Roses and Aromatic Plants, Kazanluk, Bulgaria
| | - Stanko Stanev
- Agricultural Academy, Institute of Roses and Aromatic Plants, Kazanluk, Bulgaria
| | - Antoaneta Zheleva
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria.
| | - Veselina Gadjeva
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 Armeiska Str., 6000 Stara Zagora, Bulgaria
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Karamalakova Y, Chuttani K, Sharma R, Zheleva A, Gadjeva V, Mishra A. Biological evaluation of new potential anticancer agent for tumour imaging and radiotherapy by two methods: 99mTc-radiolabelling and EPR spectroscopy. BIOTECHNOL BIOTEC EQ 2014; 28:1172-1180. [PMID: 26019604 PMCID: PMC4434051 DOI: 10.1080/13102818.2014.978666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Accepted: 05/20/2014] [Indexed: 11/21/2022] Open
Abstract
Recently, a new class of in vitro and ex vivo radiotracers/radioprotectors, the nitroxyl-labelled agent 1-ethyl-1-nitroso-3-[4-(2,2,6,6-tetramethylpiperidine-1-oxyl)]-urea (SLENU), has been discovered. Our previous investigations demonstrated that SLENU is a low-molecular-weight stable free radical which is freely membrane permeable, easily crosses the blood brain barrier and exhibited in/ex vivo the lowest general toxicity and higher anticancer activity against some experimental tumour models. Further investigation was aimed to develop a 99mTc-labelled SLENU (97%) as a chelator and evaluate its labelling efficiency and potential use as a tumour seeking agent and for early diagnosis. Tissue biodistribution of 99mTc-SLENU was determined in normal mice at 1, 2 and 24 h (n = 4/time interval, route of administration i.v.). The distribution data were compared using male albino non-inbred mice and electron paramagnetic resonance investigation. The imaging characteristics of 99mTc-SLENU conjugate examined in BALB/c mice grafted with Ehrlich Ascitis tumour in the thigh of hind leg demonstrated major accumulation of the radiotracer in the organs and tumour. Planar images and auto-radiograms confirmed that the tumours could be visualized clearly with 99mTc-SLENU. Blood kinetic study of radio-conjugate showed a bi-exponential pattern, as well as quick reduced duration in the blood circulation. This study establishes nitroxyls as a general class of new spin-labelled diagnostic markers that reduce the negative lateral effects of radiotherapy and drug damages, and are appropriate for tumour-localization.
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Affiliation(s)
- Yanka Karamalakova
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 Armeiska Street, 6000Stara Zagora, Bulgaria
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Brig S.K. Mazumdar Marg, Delhi110054, India
- Institute of Nuclear Medicine and Allied Sciences, Brig S.K. Mazumdar Marg, Delhi110054, India
| | - Krishna Chuttani
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Brig S.K. Mazumdar Marg, Delhi110054, India
| | - Rakesh Sharma
- Institute of Nuclear Medicine and Allied Sciences, Brig S.K. Mazumdar Marg, Delhi110054, India
| | - Antoaneta Zheleva
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 Armeiska Street, 6000Stara Zagora, Bulgaria
| | - Veselina Gadjeva
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, 11 Armeiska Street, 6000Stara Zagora, Bulgaria
| | - Anil Mishra
- Division of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Brig S.K. Mazumdar Marg, Delhi110054, India
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Arora R, Dhaker AS, Sharma J, Chawla R, Gupta D, Zheleva A, Karamalakova Y, Kumar R, Sharma RK, Sharma A, Sultana S, Tripathi RP, Sharma RK, Gadjeva V. Radical Scavenging and Radiomodulatory Effects of Psoralea corylifolia Linn. Substantiated by in vitro Assays and EPR Spectroscopy. Z NATURFORSCH C 2014. [DOI: 10.1515/znc-2011-1-206] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The present study is the first report of the radiomodulatory effects of Psoralea corylifolia Linn. The extract (IBG-RA-26) prepared from P. corylifolia was chemically analysed by HPLC, LC-MS/MS and NMR. The total polyphenolic content of IBG-RA-26 was 0.287 mg/ ml of quercetin equivalents. IBG-RA-26 exhibited a dose-dependent increase in 2,2-diphenyl- 1-picrylhydrazyl (DPPH) radical scavenging activity. It exhibited comparable (> 50%) site-specific and non-site-specific hydroxyl radical scavenging activity in higher concentration ranges (500 - 1000 μg/ml), while at lower concentrations (5 - 50 μg/ml) it exhibited significantly (p < 0.05) higher non-site-specific scavenging ability compared to site-specific activity. Nitric oxide scavenging activity of IBG-RA-26 (5 - 1000 μg/ml) increased in a concentrationdependent manner, while maximum superoxide ion scavenging ability (79%) was observed at 50 μg/ml. The electron donation potential of IBG-RA-26 was found to be higher than that of ascorbic acid at lower concentrations (up to 5 μg/ml). Analysis of the ability of IBGRA- 26 to protect membranes against γ-radiation, utilizing an artificial membrane system (liposome), revealed a significant (p < 0.05) decrease in the formation of malondialdehyde (MDA) as a function of the concentration of IBG-RA-26. Radiation-induced lysis of human erythrocytes was monitored and efficacy of IBG-RA-26 was tested in the concentration range 25 - 1000 μg/ml, with significant protective efficacy observed in the range 25 - 50 μg/ml. IBG-RA-26 rendered significant (p < 0.05) protection against radiation (0.25 kGy)-induced DNA damage. EPR spectroscopy was used to investigate the DPPH radical scavenging capacity of IBG-RA-26. IBG-RA-26 exhibited a good DPPH radical scavenging capacity in a concentration-dependent manner. By direct EPR spectroscopy we have also demonstrated the possible formation of free radical species in a solution of IBG-RA-26. The wide spectrum of radioprotective and antioxidant properties exhibited by IBG-RA-26 indicate that P. corylifolia has potential as a radiomodulatory agent.
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Affiliation(s)
- Rajesh Arora
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, Armeiska St. 11, Stara Zagora 6000, Bulgaria
- Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization (DRDO), Brig S. K. Mazumdar Marg, Delhi – 110054, India
| | - Atlar Singh Dhaker
- Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization (DRDO), Brig S. K. Mazumdar Marg, Delhi – 110054, India
| | - Jyoti Sharma
- Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization (DRDO), Brig S. K. Mazumdar Marg, Delhi – 110054, India
| | - Raman Chawla
- Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization (DRDO), Brig S. K. Mazumdar Marg, Delhi – 110054, India
| | - Damodar Gupta
- Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization (DRDO), Brig S. K. Mazumdar Marg, Delhi – 110054, India
| | - Antoaneta Zheleva
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, Armeiska St. 11, Stara Zagora 6000, Bulgaria
| | - Yanka Karamalakova
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, Armeiska St. 11, Stara Zagora 6000, Bulgaria
| | - Raj Kumar
- Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization (DRDO), Brig S. K. Mazumdar Marg, Delhi – 110054, India
| | - Raj K. Sharma
- Peoples College of Medical Sciences, Bhopal – 462037, India
| | - Ashok Sharma
- Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization (DRDO), Brig S. K. Mazumdar Marg, Delhi – 110054, India
| | - Sarwat Sultana
- Department of Medical Elementology and Toxicology, Jamia Hamdard, New Delhi – 110062, India
| | - Rajendra P. Tripathi
- Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization (DRDO), Brig S. K. Mazumdar Marg, Delhi – 110054, India
| | - Rakesh K. Sharma
- Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization (DRDO), Brig S. K. Mazumdar Marg, Delhi – 110054, India
| | - Veselina Gadjeva
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, Armeiska St. 11, Stara Zagora 6000, Bulgaria
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Karamalakova Y, Sharma J, Nikolova G, Stanev S, Arora R, Gadjeva V, Zheleva A. Studies on Antioxidant Properties before and after UV- And Γ-Irradiation of Bulgarian Lavender Essential Oil Isolated fromLavandula AngostifoliaMill. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.5504/bbeq.2012.0138] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Georgieva E, Karamalakova Y, Nikolova G, Grigorov B, Pavlov D, Gadjeva V, Zheleva A. Radical Scavenging Capacity of Seeds and Leaves Ethanol Extracts ofCynara Scolymus L.—A Comparative Study. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.5504/50yrtimb.2011.0028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Zheleva A, Karamalakova Y, Nikolova G, Kumar R, Sharma R, Gadjeva V. A New Antioxidant with Natural Origin Characterized by Electron Paramagnetic Resonance Spectroscopy Methods. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.5504/50yrtimb.2011.0027] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Karamalakova Y, Sharma J, Sharma R, Gadjeva V, Kumar R, Zheleva A. Comparative Investigation on Radical Scavenging Activity and Protective Properties of Natural Isolated and Synthetic Antioxidants. BIOTECHNOL BIOTEC EQ 2012. [DOI: 10.5504/50yrtimb.2011.0032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Arora R, Dhaker AS, Adhikari M, Sharma J, Chawla R, Gupta D, Zheleva A, Karamalakova Y, Kumar R, Sharma RK, Sharma A, Sultana S, Tripathi RP, Sharma RK, Gadjeva V. Radical Scavenging and Radiomodulatory Effects of Psoralea corylifolia Linn. Substantiated by in vitro Assays and EPR Spectroscopy. Z NATURFORSCH C 2011. [DOI: 10.5560/znc.2011.66c0035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Arora R, Dhaker AS, Adhikari M, Sharma J, Chawla R, Gupta D, Zheleva A, Karamalakova Y, Kumar R, Sharma RK, Sharma A, Sultana S, Sharma RK, Tripathi RP, Gadjeva V. Radical scavenging and radiomodulatory effects of Psoralea corylifolia Linn. substantiated by in vitro assays and EPR spectroscopy. Z NATURFORSCH C 2011; 66:35-46. [PMID: 21476435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The present study is the first report of the radiomodulatory effects of Psoralea corylifolia Linn. The extract (IBG-RA-26) prepared from P. corylifolia was chemically analysed by HPLC, LC-MS/MS and NMR. The total polyphenolic content of IBG-RA-26 was 0.287 mg/ml of quercetin equivalents. IBG-RA-26 exhibited a dose-dependent increase in 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity. It exhibited comparable (> 50%) site-specific and non-site-specific hydroxyl radical scavenging activity in higher concentration ranges (500-1000 microg/ml), while at lower concentrations (5-50 microg/ml) it exhibited significantly (p < 0.05) higher non-site-specific scavenging ability compared to site-specific activity. Nitric oxide scavenging activity of IBG-RA-26 (5-1000 microg/ml) increased in a concentration-dependent manner, while maximum superoxide ion scavenging ability (79%) was observed at 50 microg/ml. The electron donation potential of IBG-RA-26 was found to be higher than that of ascorbic acid at lower concentrations (up to 5 microg/ml). Analysis of the ability of IBG-RA-26 to protect membranes against gamma-radiation, utilizing an artificial membrane system (liposome), revealed a significant (p < 0.05) decrease in the formation of malondialdehyde (MDA) as a function of the concentration of IBG-RA-26. Radiation-induced lysis of human erythrocytes was monitored and efficacy of IBG-RA-26 was tested in the concentration range 25-1000 microg/ml, with significant protective efficacy observed in the range 25-50 microg/ml. IBG-RA-26 rendered significant (p < 0.05) protection against radiation (0.25 kGy)-induced DNA damage. EPR spectroscopy was used to investigate the DPPH radical scavenging capacity of IBG-RA-26. IBG-RA-26 exhibited a good DPPH radical scavenging capacity in a concentration-dependent manner. By direct EPR spectroscopy we have also demonstrated the possible formation of free radical species in a solution of IBG-RA-26. The wide spectrum of radioprotective and antioxidant properties exhibited by IBG-RA-26 indicate that P. corylifolia has potential as a radiomodulatory agent.
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Affiliation(s)
- Rajesh Arora
- Department of Chemistry and Biochemistry, Medical Faculty, Trakia University, Armeiska St. 11, Stara Zagora 6000, Bulgaria.
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