1
|
Krumova E, Benkova D, Stoyancheva G, Dishliyska V, Miteva-Staleva J, Kostadinova A, Ivanov K, El-Sayed K, Staneva G, Elshoky HA. Exploring the mechanism underlying the antifungal activity of chitosan-based ZnO, CuO, and SiO 2 nanocomposites as nanopesticides against Fusarium solani and Alternaria solani. Int J Biol Macromol 2024; 268:131702. [PMID: 38643917 DOI: 10.1016/j.ijbiomac.2024.131702] [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: 11/27/2023] [Revised: 04/13/2024] [Accepted: 04/18/2024] [Indexed: 04/23/2024]
Abstract
Chitosan-based nanocomposites (CS NCs) are gaining considerable attention as multifaceted antifungal agents. This study investigated the antifungal activity of NCs against two phytopathogenic strains: Fusarium solani (F. solani) and Alternaria solani (A. solani). Moreover, it sheds light on their underlying mechanisms of action. The NCs, CS-ZnO, CS-CuO, and CS-SiO2, were characterized using advanced methods. Dynamic and electrophoretic light scattering techniques revealed their size range (60-170 nm) and cationic nature, as indicated by the positive zeta potential values (from +16 to +22 mV). Transmission electron microscopy revealed the morphology of the NCs as agglomerates formed between the chitosan and oxide components. X-ray diffraction patterns confirmed crystalline structures with specific peaks indicating their constituents. Antifungal assessments using the agar diffusion technique demonstrated significant inhibitory effects of the NCs on both fungal strains (1.5 to 4-fold), surpassing the performance of the positive control, nystatin. Notably, the NCs exhibited superior antifungal potency, with CS-ZnO NCs being the most effective. A. solani was the most sensitive strain to the studied agents. Furthermore, the tested NCs induced oxidative stress in fungal cells, which elevated stress biomarker levels, such as superoxide dismutase (SOD) activity and protein carbonyl content (PCC), 2.5 and 6-fold for the most active CS-CuO in F. solani respectively. Additionally, they triggered membrane lipid peroxidation up to 3-fold higher compared to control, a process that potentially compromises membrane integrity. Laurdan fluorescence spectroscopy highlighted alterations in the molecular organization of fungal cell membranes induced by the NCs. CS-CuO NCs induced a membrane rigidifying effect, while CS-SiO2 and CS-ZnO could rigidify membranes in A. solani and fluidize them in F. solani. In summary, this study provides an in-depth understanding of the interactions of CS-based NCs with two fungal strains, showing their antifungal activity and offering insights into their mechanisms of action. These findings emphasize the potential of these NCs as effective and versatile antifungal agents.
Collapse
Affiliation(s)
- Ekaterina Krumova
- Institute of Microbiology, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria.
| | - Dayana Benkova
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
| | - Galina Stoyancheva
- Institute of Microbiology, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
| | | | - Jeny Miteva-Staleva
- Institute of Microbiology, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria
| | - Aneliya Kostadinova
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria.
| | - Kamen Ivanov
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria; Institute of Electronics, Bulgarian Academy of Sciences, 1784 Sofia, Bulgaria
| | - Kh El-Sayed
- Faculty of Engineering, Galala University, Attaka 51745, Suez, Egypt; Nanotechnology and Advanced Materials Central Lab, Agricultural Research Center, Giza 12619, Egypt; Regional Center for Food and Feed, Agricultural Research Center, Giza 12619, Egypt
| | - Galya Staneva
- Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria.
| | - Hisham A Elshoky
- Nanotechnology and Advanced Materials Central Lab, Agricultural Research Center, Giza 12619, Egypt; Regional Center for Food and Feed, Agricultural Research Center, Giza 12619, Egypt; Tumor Biology Research Program, Department of Research, Children's Cancer Hospital, Cairo 11441, Egypt.
| |
Collapse
|
2
|
Abrashev R, Krumova E, Petrova P, Eneva R, Dishliyska V, Gocheva Y, Engibarov S, Miteva-Staleva J, Spasova B, Kolyovska V, Angelova M. Glucose Catabolite Repression Participates in the Regulation of Sialidase Biosynthesis by Antarctic Strain Penicillium griseofulvum P29. J Fungi (Basel) 2024; 10:241. [PMID: 38667912 PMCID: PMC11051313 DOI: 10.3390/jof10040241] [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: 02/28/2024] [Revised: 03/18/2024] [Accepted: 03/21/2024] [Indexed: 04/28/2024] Open
Abstract
Sialidases (neuraminidases) catalyze the removal of terminal sialic acid residues from glycoproteins. Novel enzymes from non-clinical isolates are of increasing interest regarding their application in the food and pharmaceutical industry. The present study aimed to evaluate the participation of carbon catabolite repression (CCR) in the regulation of cold-active sialidase biosynthesis by the psychrotolerant fungal strain Penicillium griseofulvum P29, isolated from Antarctica. The presence of glucose inhibited sialidase activity in growing and non-growing fungal mycelia in a dose- and time-dependent manner. The same response was demonstrated with maltose and sucrose. The replacement of glucose with glucose-6-phosphate also exerted CCR. The addition of cAMP resulted in the partial de-repression of sialidase synthesis. The CCR in the psychrotolerant strain P. griseofulvum P29 did not depend on temperature. Sialidase might be subject to glucose repression by both at 10 and 25 °C. The fluorescent assay using 4MU-Neu5Ac for enzyme activity determination under increasing glucose concentrations evidenced that CCR may have a regulatory role in sialidase production. The real-time RT-PCR experiments revealed that the sialidase gene was subject to glucose repression. To our knowledge, this is the first report that has studied the effect of CCR on cold-active sialidase, produced by an Antarctic strain.
Collapse
Affiliation(s)
- Radoslav Abrashev
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113 Sofia, Bulgaria; (R.A.); (E.K.); (V.D.); (J.M.-S.); (B.S.)
| | - Ekaterina Krumova
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113 Sofia, Bulgaria; (R.A.); (E.K.); (V.D.); (J.M.-S.); (B.S.)
| | - Penka Petrova
- Department of General Microbiology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113 Sofia, Bulgaria; (P.P.); (R.E.); (Y.G.); (S.E.)
| | - Rumyana Eneva
- Department of General Microbiology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113 Sofia, Bulgaria; (P.P.); (R.E.); (Y.G.); (S.E.)
| | - Vladislava Dishliyska
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113 Sofia, Bulgaria; (R.A.); (E.K.); (V.D.); (J.M.-S.); (B.S.)
| | - Yana Gocheva
- Department of General Microbiology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113 Sofia, Bulgaria; (P.P.); (R.E.); (Y.G.); (S.E.)
| | - Stefan Engibarov
- Department of General Microbiology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113 Sofia, Bulgaria; (P.P.); (R.E.); (Y.G.); (S.E.)
| | - Jeny Miteva-Staleva
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113 Sofia, Bulgaria; (R.A.); (E.K.); (V.D.); (J.M.-S.); (B.S.)
| | - Boryana Spasova
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113 Sofia, Bulgaria; (R.A.); (E.K.); (V.D.); (J.M.-S.); (B.S.)
| | - Vera Kolyovska
- Institute of Experimental Morphology, Pathology and Anthropology with Museum, Bulgarian Academy of Sciences, Academician G. Bonchev 25, 1113 Sofia, Bulgaria;
| | - Maria Angelova
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113 Sofia, Bulgaria; (R.A.); (E.K.); (V.D.); (J.M.-S.); (B.S.)
| |
Collapse
|
3
|
Dolashki A, Abrashev R, Kaynarov D, Krumova E, Velkova L, Eneva R, Engibarov S, Gocheva Y, Miteva-Staleva J, Dishliyska V, Spasova B, Angelova M, Dolashka P. Structural and functional characterization of cold-active sialidase isolated from Antarctic fungus Penicillium griseofulvum P29. Biochem Biophys Rep 2024; 37:101610. [PMID: 38155944 PMCID: PMC10753047 DOI: 10.1016/j.bbrep.2023.101610] [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: 09/28/2023] [Revised: 12/05/2023] [Accepted: 12/08/2023] [Indexed: 12/30/2023] Open
Abstract
The fungal strain, Penicillium griseofulvum P29, isolated from a soil sample taken from Terra Nova Bay, Antarctica, was found to be a good producer of sialidase (P29). The present study was focused on the purification and structural characterization of the enzyme. P29 enzyme was purified using a Q-Sepharose column and fast performance liquid chromatography separation on a Mono Q column. The determined molecular mass of the purified enzyme of 40 kDa by SDS-PAGE and 39924.40 Da by matrix desorption/ionization mass spectrometry (MALDI-TOF/MS) analysis correlated well with the calculated mass (39903.75 kDa) from the amino acid sequence of the enzyme. P29 sialidase shows a temperature optimum of 37 °C and low-temperature stability, confirming its cold-active nature. The enzyme is more active towards α(2 → 3) sialyl linkages than those containing α(2 → 6) linkages. Based on the determined amino acid sequence and 3D structural modeling, a 3D model of P29 sialidase was presented, and the properties of the enzyme were explained. The conformational stability of the enzyme was followed by fluorescence spectroscopy, and the new enzyme was found to be conformationally stable in the neutral pH range of pH 6 to pH 9. In addition, the enzyme was more stable in an alkaline environment than in an acidic environment. The purified cold-active enzyme is the only sialidase produced and characterized from Antarctic fungi to date.
Collapse
Affiliation(s)
- Aleksandar Dolashki
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia, 1113, Acad. Georgy Bonchev str., bl. 9, Bulgaria
| | - Radoslav Abrashev
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, 1113, Acad. G. Bonchev str., bl. 26, Bulgaria
| | - Dimitar Kaynarov
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia, 1113, Acad. Georgy Bonchev str., bl. 9, Bulgaria
| | - Ekaterina Krumova
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, 1113, Acad. G. Bonchev str., bl. 26, Bulgaria
| | - Lyudmila Velkova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia, 1113, Acad. Georgy Bonchev str., bl. 9, Bulgaria
| | - Rumyana Eneva
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, 1113, Acad. G. Bonchev str., bl. 26, Bulgaria
| | - Stefan Engibarov
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, 1113, Acad. G. Bonchev str., bl. 26, Bulgaria
| | - Yana Gocheva
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, 1113, Acad. G. Bonchev str., bl. 26, Bulgaria
| | - Jeny Miteva-Staleva
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, 1113, Acad. G. Bonchev str., bl. 26, Bulgaria
| | - Vladislava Dishliyska
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, 1113, Acad. G. Bonchev str., bl. 26, Bulgaria
| | - Boryana Spasova
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, 1113, Acad. G. Bonchev str., bl. 26, Bulgaria
| | - Maria Angelova
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, 1113, Acad. G. Bonchev str., bl. 26, Bulgaria
| | - Pavlina Dolashka
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia, 1113, Acad. Georgy Bonchev str., bl. 9, Bulgaria
| |
Collapse
|
4
|
Dishliyska V, Stoyancheva G, Abrashev R, Miteva-Staleva J, Spasova B, Angelova M, Krumova E. Catalase from the Antarctic Fungus Aspergillus fumigatus I-9-Biosynthesis and Gene Characterization. Indian J Microbiol 2023; 63:541-548. [PMID: 38031622 PMCID: PMC10682308 DOI: 10.1007/s12088-023-01110-8] [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: 07/14/2023] [Accepted: 10/07/2023] [Indexed: 12/01/2023] Open
Abstract
Extremely cold habitats are a serious challenge for the existing there organisms. Inhabitants of these conditions are mostly microorganisms and lower mycetae. The mechanisms of microbial adaptation to extreme conditions are still unclear. Low temperatures cause significant physiological and biochemical changes in cells. Recently, there has been increasing interest in the relationship between low-temperature exposure and oxidative stress events, as well as the importance of antioxidant enzymes for survival in such conditions. The catalase is involved in the first line of the cells' antioxidant defense. Published information supports the concept of a key role for catalase in antioxidant defense against cold stress in a wide range of organisms isolated from the Antarctic. Data on representatives of microscopic fungi, however, are rarely found. There is scarce information on the characterization of catalase synthesized by adapted to cold stress organisms. Overall, this study aimed to observe the role of catalase in the survival strategy of filamentous fungi in extremely cold habitats and to identify the gene encoded catalase enzyme. Our results clearly showed that catalase is the main part of antioxidant enzyme defense in fungal cells against oxidative stress caused by low temperature exposure.
Collapse
Affiliation(s)
- Vladislava Dishliyska
- Departament of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G, Bonchev Str. Bl.26, 1113 Sofia, Bulgaria
| | - Galina Stoyancheva
- Departament of General Microbiology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G, Bonchev Str. Bl.26, 1113 Sofia, Bulgaria
| | - Radoslav Abrashev
- Departament of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G, Bonchev Str. Bl.26, 1113 Sofia, Bulgaria
| | - Jeny Miteva-Staleva
- Departament of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G, Bonchev Str. Bl.26, 1113 Sofia, Bulgaria
| | - Boriana Spasova
- Departament of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G, Bonchev Str. Bl.26, 1113 Sofia, Bulgaria
| | - Maria Angelova
- Departament of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G, Bonchev Str. Bl.26, 1113 Sofia, Bulgaria
| | - Ekaterina Krumova
- Departament of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G, Bonchev Str. Bl.26, 1113 Sofia, Bulgaria
| |
Collapse
|
5
|
Stoyancheva G, Dishliyska V, Miteva‐Staleva J, Kostadinova N, Abrashev R, Angelova M, Krumova E. Sequencing and gene expression analysis of catalase genes in Antarctic fungal strain Penicillium griseofulvum P29. Polar Biol 2022. [DOI: 10.1007/s00300-021-03001-4] [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: 11/30/2022]
|
6
|
Krumova E, Abrashev R, Dishliyska V, Stoyancheva G, Kostadinova N, Miteva-Staleva J, Spasova B, Angelova M. Cold-active catalase from the psychrotolerant fungus Penicillium griseofulvum. J Basic Microbiol 2021; 61:782-794. [PMID: 34309887 DOI: 10.1002/jobm.202100209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 04/27/2021] [Revised: 06/23/2021] [Accepted: 07/13/2021] [Indexed: 11/08/2022]
Abstract
Cold-active catalase (CAT) elicits great interest because of its vast prospective at the medical, commercial, and biotechnological levels. The study paper reports the production of cold-active CAT by the strain Penicillium griseofulvum P29 isolated from Antarctic soil. Improved enzyme production was achieved by optimization of medium and culture conditions. Maximum CAT was demonstrated under low glucose content (2%), 10% inoculum size, temperature 20°C, and dissolved oxygen concentration (DO) 40%. An effective laboratory technology based on changing the oxidative stress level through an increase of DO in the bioreactor was developed. The used strategy resulted in a 1.7- and 1.4-fold enhanced total enzyme activity and maximum enzyme productivity. The enzyme was purified and characterized. P. griseofulvum P29 CAT was most active at approximately 20°C and pH 6.0. Its thermostability was in the range between 5°C and 40°C.
Collapse
Affiliation(s)
- Ekaterina Krumova
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Radoslav Abrashev
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Vladislava Dishliyska
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Galina Stoyancheva
- Department of General Microbiology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Nedelina Kostadinova
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Jeny Miteva-Staleva
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Boryana Spasova
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Maria Angelova
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| |
Collapse
|
7
|
Angelova H, Krumova E, Dzhambazova E, Pechlivanova D. Effects of the antinociceptive dipeptide L-tyrosine-L-arginine (kyotorphin) on the motivation, anxiety, and memory in rats. Folia Med (Plovdiv) 2021; 63:189-196. [PMID: 33932008 DOI: 10.3897/folmed.63.e53912] [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: 05/04/2020] [Accepted: 06/15/2020] [Indexed: 11/12/2022] Open
Abstract
INTRODUCTION The endogenous dipeptide L-tyrosine-L-arginine (kyotorphin, KTP) is found in brain structures related to the processing of information for nociception, the control of emotions, and memory formation. Besides the antinociceptive effect of KTP, it has a mild protective activity against the deleterious influence of the brain hypoperfusion and streptozotocin on the behavior and memory. AIM We aimed to study the effects of the intracerebroventricular injection of effective antinociceptive doses of KTP on the motivational behavior, memory, and blood and hippocampal levels of the carbonylated proteins in healthy male adult Wistar rats. MATERIALS AND METHODS We used a paw-pressure test for assessment of acute nociception, an open field test for assessment of exploration and habituation to a new environment, elevated plus maze test for the evaluation of anxiety-like behavior, and novel object recognition test for working memory. Carbonylated protein assay was used for the assessment of the oxidative impairment of the proteins. The results were analyzed by ANOVA. RESULTS The present data showed that all single doses of KTP exerted an antinociceptive effect, but this effect was not observed after chronic administration. Only the highest dose of 100 µg was able to induce anxiolytic and motor inhibiting effects. None of the doses used showed effects on the recognition memory or the level of the carbonylated protein. CONCLUSION Our results showed that KTP exerted its antinociceptive effect without affecting negatively the blood and brain carbonylated protein or basic behavioral parameters related to the exploration, motivation, and memory formation in healthy rats.
Collapse
Affiliation(s)
- Hristina Angelova
- Insitute of Neurobiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Ekaterina Krumova
- Institute of Microbiology, Bulgarian Academy of Sciences,, Sofia, Bulgaria
| | | | | |
Collapse
|
8
|
Affiliation(s)
- Rumyana Eneva
- Department of General Microbiology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Stephan Engibarov
- Department of General Microbiology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Radoslav Abrashev
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Ekaterina Krumova
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Maria Angelova
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| |
Collapse
|
9
|
Abrashev R, Krumova E, Petrova P, Eneva R, Kostadinova N, Miteva-Staleva J, Engibarov S, Stoyancheva G, Gocheva Y, Kolyovska V, Dishliyska V, Spassova B, Angelova M. Distribution of a novel enzyme of sialidase family among native filamentous fungi. Fungal Biol 2021; 125:412-425. [PMID: 33910682 DOI: 10.1016/j.funbio.2020.12.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 08/29/2020] [Revised: 11/18/2020] [Accepted: 12/23/2020] [Indexed: 11/25/2022]
Abstract
Sialidases (neuraminidases, EC 3.2.1.18) are widely distributed in biological systems but there are only scarce data on its production by filamentous fungi. The aim of this study was to obtain information about sialidase distribution in filamentous fungi from non-clinical isolates, to determine availability of sialidase gene, and to select a perspective producer. A total of 113 fungal strains belonging to Ascomycota and Zygomycota compassing 21 genera and 51 species were screened. Among them, 77 strains (11 orders, 14 families and 16 genera) were able to synthesize sialidase. Present data showed a habitat-dependent variation of sialidase activity between species and within species, depending on location. Sialidase gene was identified in sialidase-positive and sialidase-negative strains. . Among three perspective strains, the best producer was chosen based on their sialidase production depending on type of cultivation, medium composition, and growth temperature. The selected P. griseofulvum Р29 was cultivated in 3L bioreactor at 20 °C on medium supplemented with 0.5% milk whey. The results demonstrated better growth and 2.3-fold higher maximum enzyme activity compared to the shaken flask cultures. Moreover, the early occurring maximum (48 h) is an important prerequisite for future up scaling of the process.
Collapse
Affiliation(s)
- Radoslav Abrashev
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113, Sofia, Bulgaria
| | - Ekaterina Krumova
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113, Sofia, Bulgaria
| | - Penka Petrova
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113, Sofia, Bulgaria
| | - Rumyana Eneva
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113, Sofia, Bulgaria
| | - Nedelina Kostadinova
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113, Sofia, Bulgaria
| | - Jeni Miteva-Staleva
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113, Sofia, Bulgaria
| | - Stephan Engibarov
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113, Sofia, Bulgaria
| | - Galina Stoyancheva
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113, Sofia, Bulgaria
| | - Yana Gocheva
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113, Sofia, Bulgaria
| | - Vera Kolyovska
- Institute of Experimental Morphology, Pathology and Anthropology with Museum, Bulgarian Academy of Sciences, Academician G. Bonchev 25, 1113 Sofia, Bulgaria
| | - Vladislava Dishliyska
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113, Sofia, Bulgaria
| | - Boryana Spassova
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113, Sofia, Bulgaria
| | - Maria Angelova
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Academician G. Bonchev 26, 1113, Sofia, Bulgaria.
| |
Collapse
|
10
|
Dimitrova L, Philipov S, Zaharieva MM, Miteva-Staleva J, Popova M, Tserovska L, Krumova E, Zhelezova G, Bankova V, Najdenski H. In vivo assessment of acute and subacute toxicity of ethyl acetate extract from aerial parts of Geum urbanum L. BIOTECHNOL BIOTEC EQ 2020. [DOI: 10.1080/13102818.2020.1848461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Affiliation(s)
- Lyudmila Dimitrova
- Department of Infectious Microbiology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Stanislav Philipov
- Laboratory Pathomorphology, Chair “Anatomy, Histology, Pathology and Forensic Medicine,” Medical Faculty, Sofia University "St. Kliment Ohridski," Sofia, Bulgaria
| | - Maya Margaritova Zaharieva
- Department of Infectious Microbiology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Jeni Miteva-Staleva
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Milena Popova
- Chemistry of Natural Products Laboratory, Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Lilia Tserovska
- Department of Biology, Medical Genetics and Microbiology, Medical Faculty, Sofia University "St. Kliment Ohridski," Sofia, Bulgaria
| | - Ekaterina Krumova
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Galina Zhelezova
- Department of Biology, Medical Genetics and Microbiology, Medical Faculty, Sofia University "St. Kliment Ohridski," Sofia, Bulgaria
| | - Vassya Bankova
- Chemistry of Natural Products Laboratory, Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Hristo Najdenski
- Department of Infectious Microbiology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| |
Collapse
|
11
|
Pechlivanova D, Krumova E, Kostadinova N, Mitreva-Staleva J, Grozdanov P, Stoynev A. Protective effects of losartan on some type 2 diabetes mellitus-induced complications in Wistar and spontaneously hypertensive rats. Metab Brain Dis 2020; 35:527-538. [PMID: 31997264 DOI: 10.1007/s11011-020-00534-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 01/17/2020] [Indexed: 01/13/2023]
Abstract
Diabetes mellitus type 2 (T2DM) is characterized by resistance of insulin receptors and/or inadequate insulin secretion resulting in metabolic and structural complications including vascular diseases, arterial hypertension and different behavioral alterations. We aimed to study the effects of the antihypertensive angiotensin AT1 receptor antagonist losartan on the T2DM-induced changes of exploratory behavior, anxiety, nociception and short term memory in normotensive Wistar and spontaneously hypertensive rats (SHRs). The experimental model of T2DM induced by a combination of high fat diet and streptozotocin, decreased exploratory activity and increased the level of carbonylated proteins in selected brain structures in both strains; as well it increased corticosterone level, pain threshold, anxiety-like behavior, and decline short term memory only in SHRs. Losartan treatment alleviated some of the T2DM- induced metabolic complications, abolished the T2DM-induced hypo activity, and normalized the corticosterone level, carbonylated proteins in brain, nociception and memory. Losartan did not exert effect on the anxiety behavior in both strains. We showed that T2DM exerted more pronounced negative effects on the rats with comorbid hypertension as compared to normotensive rats. Overall effects on the studied behavioral parameters are related to decreased exploration of the new environment, increased anxiety-like behavior, and decline in short-term memory. The systemic sub-chronic treatment with an angiotensin AT1 receptor antagonist losartan ameliorated most of these complications.
Collapse
Affiliation(s)
- Daniela Pechlivanova
- Institute of Neurobiology, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 23, 1113, Sofia, Bulgaria.
| | - Ekaterina Krumova
- Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 23, 1113, Sofia, Bulgaria
| | - Nedelina Kostadinova
- Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 23, 1113, Sofia, Bulgaria
| | - Jeny Mitreva-Staleva
- Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 23, 1113, Sofia, Bulgaria
| | - Petar Grozdanov
- Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 23, 1113, Sofia, Bulgaria
| | - Alexander Stoynev
- Department of Pathophysiology, Medical University-Sofia, St. Georgi Sofiyski Str. 1, 1431, Sofia, Bulgaria
| |
Collapse
|
12
|
Krumova E, Kostadinova N, Miteva-Staleva J, Stoyancheva G, Spassova B, Abrashev R, Angelova M. Potential of ligninolytic enzymatic complex produced by white-rot fungi from genus Trametes isolated from Bulgarian forest soil. Eng Life Sci 2018; 18:692-701. [PMID: 32624949 DOI: 10.1002/elsc.201800055] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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: 03/12/2018] [Revised: 06/14/2018] [Accepted: 06/20/2018] [Indexed: 11/09/2022] Open
Abstract
Because of the crucial role of ligninolytic enzymes in a variety of industrial processes, the demand for a new effective producer has been constantly increasing. Furthermore, information on enzyme synthesis by autochthonous fungal strains is very seldom found. Two fungal strains producing ligninolytic enzymes were isolated from Bulgarian forest soil. They were identified as being Trametes trogii and T. hirsuta. These two strains were assessed for their enzyme activities, laccase (Lac), lignin peroxidase (LiP) and Mn-dependent peroxidase (MnP) in culture filtrate depending on the temperature and the type of nutrient medium. T. trogii was selected as the better producer of ligninolytic enzymes. The production process was further improved by optimizing a number of parameters such as incubation time, type of cultivation, volume ratio of medium/air, inoculum size and the addition of inducers. The maximum activities of enzymes synthesized by T. trogii was detected as 11100 U/L for Lac, 2.5 U/L for LiP and 4.5 U/L for MnP after 14 days of incubation at 25°C under static conditions, volume ratio of medium/air 1:6, and 3 plugs as inoculum. Among the supplements tested, 5% glycerol increased Lac activity to a significant extent. The addition of 1% veratryl alcohol had a positive effect on MnP.
Collapse
Affiliation(s)
- Ekaterina Krumova
- Department of Mycology The Stephan Angeloff Institute of Microbiology Bulgarian Academy of Sciences Sofia Bulgaria
| | - Nedelina Kostadinova
- Department of Mycology The Stephan Angeloff Institute of Microbiology Bulgarian Academy of Sciences Sofia Bulgaria
| | - Jeni Miteva-Staleva
- Department of Mycology The Stephan Angeloff Institute of Microbiology Bulgarian Academy of Sciences Sofia Bulgaria
| | - Galina Stoyancheva
- Department of General Microbiology The Stephan Angeloff Institute of Microbiology Bulgarian Academy of Sciences Sofia Bulgaria
| | - Boryana Spassova
- Department of Mycology The Stephan Angeloff Institute of Microbiology Bulgarian Academy of Sciences Sofia Bulgaria
| | - Radoslav Abrashev
- Department of Mycology The Stephan Angeloff Institute of Microbiology Bulgarian Academy of Sciences Sofia Bulgaria
| | - Maria Angelova
- Department of Mycology The Stephan Angeloff Institute of Microbiology Bulgarian Academy of Sciences Sofia Bulgaria
| |
Collapse
|
13
|
Abrashev R, Feller G, Kostadinova N, Krumova E, Alexieva Z, Gerginova M, Spasova B, Miteva-Staleva J, Vassilev S, Angelova M. Production, purification, and characterization of a novel cold-active superoxide dismutase from the Antarctic strain Aspergillus glaucus 363. Fungal Biol 2016; 120:679-89. [DOI: 10.1016/j.funbio.2016.03.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 02/29/2016] [Accepted: 03/04/2016] [Indexed: 02/07/2023]
|
14
|
Lazarova N, Krumova E, Stefanova T, Georgieva N, Angelova M. The oxidative stress response of the filamentous yeast Trichosporon cutaneum R57 to copper, cadmium and chromium exposure. BIOTECHNOL BIOTEC EQ 2014; 28:855-862. [PMID: 26019570 PMCID: PMC4433943 DOI: 10.1080/13102818.2014.965020] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [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: 04/02/2014] [Accepted: 06/27/2014] [Indexed: 12/15/2022] Open
Abstract
Despite the intensive research in the past decade on the microbial bioaccumulation of heavy metals, the significance of redox state for oxidative stress induction is not completely clarified. In the present study, we examined the effect of redox-active (copper and chromium) and redox-inactive (cadmium) metals on the changes in levels of oxidative stress biomarkers and antioxidant enzyme defence in Trichosporon cutaneum R57 cells. This filamentous yeast strain showed significant tolerance and bioaccumulation capability of heavy metals. Our findings indicated that the treatment by both redox-active and redox-inactive heavy metal induced oxidative stress events. Enhanced concentrations of Cu2+, Cr6+ and Cd2+ caused acceleration in the production of reactive oxygen species (ROS), increase in the level of oxidatively damaged proteins and accumulation of reserve carbohydrates (glycogen and trehalose). Cell response against heavy metal exposure also includes elevation in the activities of antioxidant enzymes, superoxide dismutase and catalase, which are key enzymes for directly scavenging of ROS. Despite the mentioned changes in the stress biomarkers, T. cutaneum did not show a significant growth diminution. Probably, activated antioxidant defence contributes to the yeast survival under conditions of heavy metal stress.
Collapse
Affiliation(s)
- Nevena Lazarova
- Department of Biotechnology, University of Chemical Technology and Metallurgy , 8 Kliment Ohridsky, 1756 Sofia , Bulgaria
| | - Ekaterina Krumova
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences , Academician G. Bonchev 26, 1113 Sofia , Bulgaria
| | - Tsvetanka Stefanova
- Department of Immunology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences , Academician G. Bonchev 26, 1113 Sofia , Bulgaria
| | - Nelly Georgieva
- Department of Biotechnology, University of Chemical Technology and Metallurgy , 8 Kliment Ohridsky, 1756 Sofia , Bulgaria
| | - Maria Angelova
- Department of Mycology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences , Academician G. Bonchev 26, 1113 Sofia , Bulgaria
| |
Collapse
|
15
|
Serkedjieva J, Stefanova T, Krumova E. A Fungal Cu/Zn-Containing Superoxide Dismutase Enhances the Therapeutic Efficacy of a Plant Polyphenol Extract in Experimental Influenza Virus Infection. ACTA ACUST UNITED AC 2014; 65:419-28. [DOI: 10.1515/znc-2010-5-616] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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 combined protective effect of a polyphenol-rich extract, isolated from Geranium sanguineum L. (PC), and a novel naturally glycosylated Cu/Zn-containing superoxide dismutase, produced from the fungal strain Humicula lutea 103 (HL-SOD), in the experimental influenza A virus infection (EIVI) in mice, induced with the virus A/Aichi/2/68 (H3N2), was investigated. The combined application of HL-SOD and PC in doses, which by themselves do not defend significantly mice in EIVI, resulted in a synergistically increased protection, determined on the basis of protective indices and amelioration of lung injury. Lung weights and consolidation as well as infectious lung virus titers were all decreased significantly parallel to the reduction of the mortality rates; lung indices were raised. The excessive production of reactive oxygen species (ROS) by alveolar macrophages (aMØ) as well as the elevated levels of the lung antioxidant enzymes superoxide dismutase (SOD) and catalase (CAT), induced by EIVI, were brought to normal. For comparative reasons the combined protective effect of PC and vitamin C was investigated. The obtained results support the combined use of antioxidants for the treatment of influenza virus infection and in general indicate the beneficial protective role of combinations of viral inhibitors of natural origin with diverse modes of action.
Collapse
Affiliation(s)
- Julia Serkedjieva
- Institute of Microbiology, Bulgarian Academy of Sciences, 26, Acad. G. Bonchev St., 1113 Sofi a, Bulgaria
| | - Tsvetanka Stefanova
- Institute of Microbiology, Bulgarian Academy of Sciences, 26, Acad. G. Bonchev St., 1113 Sofi a, Bulgaria
| | - Ekaterina Krumova
- Institute of Microbiology, Bulgarian Academy of Sciences, 26, Acad. G. Bonchev St., 1113 Sofi a, Bulgaria
| |
Collapse
|
16
|
Krumova E, Lenz M, Frettloeh J, Reinersmann A, Westermann A, Maier C, Tegenthoff M. P1009: Relation between the sensory abnormalities and the treatment response in patients with complex regional pain syndrome of the upper extremity. Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)51044-9] [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: 11/24/2022]
|
17
|
Miteva-Staleva J, Stefanova T, Krumova E, Angelova M. Growth-Phase-Related Changes in Reactive Oxygen Species Generation as a Cold Stress Response in AntarcticPenicilliumStrains. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.5504/bbeq.2011.0131] [Citation(s) in RCA: 3] [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: 11/27/2022] Open
|
18
|
|
19
|
Abrashev R, Krumova E, Dishliska V, Eneva R, Engibarov S, Abrashev I, Angelova M. Differential Effect of Paraquat and Hydrogen Peroxide on the Oxidative Stress Response inVibrio CholeraeNon O1 26/06. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.5504/bbeq.2011.0118] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
|
20
|
Kostadinova N, Krumova E, Tosi S, Pashova, Angelova M. Isolation and Identification of Filamentous Fungi from Island Livingston, Antarctica. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.1080/13102818.2009.10818416] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
21
|
Serkedjieva J, Stefanova T, Krumova E, Tancheva L. Protective Effect of Polyphenol-Rich Extract on Acute Lung Injury in Influenza Virus Infected Mice. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.1080/13102818.2009.10817669] [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: 10/25/2022] Open
|
22
|
Abrashev R, Stoitsova S, Krumova E, Pashova S, Paunova-Krasteva T, Vassilev S, Dolashka-Angelova P, Angelova M. Temperature-stress tolerance of the fungal strain Aspergillus niger 26: physiological and ultrastructural changes. World J Microbiol Biotechnol 2013; 30:1661-8. [DOI: 10.1007/s11274-013-1586-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Accepted: 12/16/2013] [Indexed: 11/30/2022]
|
23
|
Krumova E, Maier C, Tegenthoff M. Neues aus der Forschung zum Komplexen Regionalen Schmerzsyndrom (CRPS). Akt Neurol 2013. [DOI: 10.1055/s-0033-1357177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- E. Krumova
- Neurologische Klinik und Poliklinik, BG-Universitätsklinikum Bergmannsheil, Ruhr-Universität, Bochum
| | - C. Maier
- Abteilung für Schmerzmedizin, BG-Universitätsklinikum Bergmannsheil, Ruhr-Universität, Bochum
| | - M. Tegenthoff
- Neurologische Klinik und Poliklinik, BG-Universitätsklinikum Bergmannsheil, Ruhr-Universität, Bochum
| |
Collapse
|
24
|
Lenz M, Maier C, Höffken O, Lissek S, Stude P, Reinersmann A, Frettlöh J, Krumova E, Tegenthoff M. CRPS I spezifische bilaterale Veränderungen somatosensorischer kortikaler Exzitabilität bleiben nach sechsmonatiger Behandlung bestehen. KLIN NEUROPHYSIOL 2013. [DOI: 10.1055/s-0033-1337190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
25
|
Oaklander AL, Lenz M, Krumova E, Hoeffken O, Stude P, Lissek S, Schwenkreis P, Reinersmann A, Frettloeh J, Richter H, Tegenthoff M, Maier C. Bilateral Somatosensory Cortex Disinhibition in Complex Regional Pain Syndrome Type I. Neurology 2012; 78:606; author reply 606-7. [DOI: 10.1212/wnl.0b013e31824ab936] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
26
|
Blankenburg M, Boekens H, Hechler T, Maier C, Krumova E, Scherens A, Magerl W, Aksu F, Zernikow B. [Reference values for quantitative sensory testing in children and adolescents : Developmental and gender differences in somatosensory perception]. Schmerz 2011; 24:380-2. [PMID: 20680647 DOI: 10.1007/s00482-010-0943-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- M Blankenburg
- Vodafone Stiftungsinstitut und Lehrstuhl für Kinderschmerztherapie und Pädiatrische Palliativmedizin, Vestische Kinder- und Jugendklinik Datteln, Universität Witten/Herdecke, Dr.-Friedrich-Steiner-Str. 5, 45711, Datteln, Deutschland.
| | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Tosi S, Kostadinova N, Krumova E, Pashova S, Dishliiska V, Spassova B, Vassilev S, Angelova M. Antioxidant enzyme activity of filamentous fungi isolated from Livingston Island, Maritime Antarctica. Polar Biol 2010. [DOI: 10.1007/s00300-010-0812-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
28
|
Serkedjieva J, Krumova E, Stefanova T, Tancheva L. Pulmonary protection of a plant polyphenol extract in influenza virus-infected mice. J Infect 2009. [DOI: 10.1016/j.jinf.2009.10.005] [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: 10/20/2022]
|
29
|
Georgiev M, Abrashev R, Krumova E, Demirevska K, Ilieva M, Angelova M. Rosmarinic acid and antioxidant enzyme activities in Lavandula vera MM cell suspension culture: a comparative study. Appl Biochem Biotechnol 2009; 159:415-25. [PMID: 19050834 DOI: 10.1007/s12010-008-8437-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2008] [Accepted: 11/11/2008] [Indexed: 11/27/2022]
Abstract
The growth and intracellular protein content of lavender (Lavandula vera MM) cell suspension culture was followed along with some antioxidant defense system members-non-enzymatic (rosmarinic acid) and enzymatic [superoxide dismutase (EC 1.15.1.1) and catalase (EC 1.11.1.6)]. It was found that the media content and the cultivation mode strongly influenced the production of plant defense compounds as well as the ratio between non-enzymatic and enzymatic ones. The bioreactor culture contains about two times more rosmarinic acid, superoxide dismutase, and catalase compared to the shake-flask cultivation. These findings are discussed with respect to the relative stress levels and plant antioxidant orchestra system. It was concluded that investigated defense system components (enzymatic and non-enzymatic) were closely associated in a complex balance. The three isoenzyme forms of SOD (Cu/ZnSOD, FeSOD, and MnSOD) in the cells of Lavandula vera were revealed by polyacrylamide gel electrophoresis analysis, and the FeSOD isoform exhibited highest activity.
Collapse
Affiliation(s)
- Milen Georgiev
- Department of Microbial Biosynthesis and Biotechnologies-Laboratory in Plovdiv, Institute of Microbiology, Bulgarian Academy of Sciences, 4002 Plovdiv, Bulgaria.
| | | | | | | | | | | |
Collapse
|
30
|
Krumova E, Dolashki A, Pashova S, Dolashka-Angelova P, Stevanovic S, Hristova R, Stefanova L, Voelter W, Angelova M. Unusual location and characterization of Cu/Zn-containing superoxide dismutase from filamentous fungus Humicola lutea. Arch Microbiol 2007; 189:121-30. [PMID: 17805512 DOI: 10.1007/s00203-007-0300-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2007] [Revised: 07/20/2007] [Accepted: 08/09/2007] [Indexed: 10/22/2022]
Abstract
The present study aims to provide new information about the unusual location of Cu/Zn-superoxide dismutase (Cu/Zn-SOD) in lower eukaryotes such as filamentous fungi. Humicola lutea, a high producer of SOD was used as a model system. Subcellular fractions [cytosol, mitochondrial matrix, and intermembrane space (IMS)] were isolated and tested for purity using activity measurements of typical marker enzymes. Evidence, based on electrophoretic mobility, sensitivity to KCN and H(2)O(2) and immunoblot analysis supports the existence of Cu/Zn-SOD in mitochondrial IMS, and the Mn-SOD in the matrix. Enzyme activity is almost equally partitioned between both the compartments, thus suggesting that the intermembrane space could be one of the major sites of exposure to superoxide anion radicals. The mitochondrial Cu/Zn-SOD was purified and compared with the previously published cytosolic enzyme. They have identical molecular mass, cyanide- and H(2)O(2)-sensitivity, N-terminal amino acid sequence, glycosylation sites and carbohydrate composition. The H. lutea mitochondrial Cu/Zn-SOD is the first identified naturally glycosylated enzyme, isolated from IMS. These findings suggest that the same Cu/Zn-SOD exists in both the mitochondrial IMS and cytosol.
Collapse
Affiliation(s)
- Ekaterina Krumova
- The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
| | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Sokmen M, Angelova M, Krumova E, Pashova S, Ivancheva S, Sokmen A, Serkedjieva J. In vitro antioxidant activity of polyphenol extracts with antiviral properties from Geranium sanguineum L. Life Sci 2005; 76:2981-93. [PMID: 15820508 DOI: 10.1016/j.lfs.2004.11.020] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2004] [Accepted: 11/08/2004] [Indexed: 11/17/2022]
Abstract
Recent evidence shows that plant polyphenols exhibit antioxidant and radical scavenging properties. By three separate and complementary methods--DPPH assay, beta-carotene-linoleic acid assay and NBT-reduction assay it was established that a polyphenol-rich extract from the medicinal plant Geranium sanguineum L. with strong anti-influenza virus activity, possessed antioxidant and radical scavenging capacities. For comparative reasons caffeic acid and the synthetic antioxidant BHT were used. Total soluble phenolic constituents of the MeOH extract measured by Folin-Ciocalteu reagent were found as 34.60% (w/w). Further it was demonstrated that the EtOAc fraction, retaining the majority of the in vivo protective effect exhibited a strong O2-scavenging activity while the n-BuOH fraction, containing the majority of the in vitro antiviral activity provoked generation of O2-. The O2- scavenging activity of all three preparations correlated with the rate of the protective effect shown in the murine model of experimental influenza virus infection. The present results are in accordance with our intensive studies on the mode of the protective effect of the plant extract which showed positively that the protection may possibly be attributed to the combination of more than one biological activities and that the use of antioxidants might be an useful approach in the treatment of influenza infection.
Collapse
Affiliation(s)
- Munevver Sokmen
- Department of Biology, Faculty of Science and Literature, Cumhuriyet University, Sivas, Turkey
| | | | | | | | | | | | | |
Collapse
|
32
|
Dolashka-Angelova P, Stevanovic S, Dolashki A, Angelova M, Serkedjieva J, Krumova E, Pashova S, Zacharieva S, Voelter W. Structural and functional analysis of glycosylated Cu/Zn-superoxide dismutase from the fungal strain Humicola lutea 103. Biochem Biophys Res Commun 2004; 317:1006-16. [PMID: 15094369 DOI: 10.1016/j.bbrc.2004.03.142] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2004] [Indexed: 11/19/2022]
Abstract
The fungal strain Humicola lutea 103 produces a naturally glycosylated Cu/Zn-superoxide dismutase (Cu/ZnSOD) (HLSOD). To improve its yield, the effect of increased concentration of Cu2+ (from 1 to 750 microg/ml) on growth and enzyme biosynthesis was studied. The primary structure of this fungal enzyme has been determined by Edman degradation of peptide fragments derived from proteolytic digest. A single chain of the protein, consisting of 152 amino acid residues, reveals a very high degree (74-85%) of structural homology in comparison to the amino acid sequences of other fungal Cu/ZnSODs. The difference of the molecular masses of H. lutea Cu/ZnSOD, measured by MALDI-MS (15,935 Da) and calculated by its amino acid sequence (15,716 Da), is attributed to the carbohydrate chain of one mole of N-acetylglucosamine, attached to the N-glycosylation site Asn23-Glu-Ser. HLSOD protected mice from mortality after experimental influenza A/Aichi/2/68 (H3N2) virus infection. Using the glycosylated HLSOD, the survival rate is increased by 66% (protective index=86.1%) and the survival time prolonged by 5.2 days, similar to the application of ribavarin, while non-glycosylated bovine SOD conferred lower protection.
Collapse
Affiliation(s)
- Pavlina Dolashka-Angelova
- Institute of Organic Chemistry, Bulgarian Academy of Sciences, Academician G. Bonchev 9, 1113 Sofia, Bulgaria.
| | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Mateeva C, Krumova E, Indzova K, Kukleva M, Ivanova K, Encheva R, Stoilova R, Georgieva M, Ilieva E, Petrova M, Kondeva V, Dimitrova M. Incidence of dental caries /Is/ on milk molars /M1,M2/ in 3-8 year-old children from Plovdiv. Folia Med (Plovdiv) 1999; 40:88-91. [PMID: 10206002] [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: 02/11/2023] Open
Abstract
The incidence of dental caries /Is/ on deciduous molars in 1216 children aged 3 to 8 from Plovdiv has been studied. The results showed highest Is in the fissures of m1 and m2 and lowest Is on the smooth surfaces. The incidence of dental caries is getting higher with statistically significant differences in the lower jaw up to the 6th year and in the upper jaw up to 7th year of age. Is in the lower jaw is higher than that of the upper jaw only in the fissures.
Collapse
Affiliation(s)
- C Mateeva
- Department of Children Dentistry, Faculty of Dentistry, Higher Medical Institute, Plovdiv, Bulgaria
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Krumova E, Votov M, Balabanova E, Ilieva E. [Comparative clinical results in the treatment of gingivitis catarrhalis in childhood with the pharmaceuticals BAW-F, Phytodont, Polyminerol]. Stomatologiia (Sofiia) 1987; 69:11-7. [PMID: 3507073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
35
|
Toreva D, Krumova E, Balabanova E. [Experimental study on the pharmaceutical BAW F, used in the treatment of inflammatory diseases of periodontium]. Stomatologiia (Sofiia) 1987; 69:9-12. [PMID: 3507072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
36
|
Vutov M, Krumova E, Enceva R. [Comparative clinical results in the treatment of gingivitis catarrhalis chronica with Furin M, applied by a tray for retention of the drug and by mouth rinsing]. Stomatologiia (Sofiia) 1987; 69:1-6. [PMID: 3333687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
37
|
Vutov M, Krumova E, Indzova K, Ivanova K. [Epidemiology of chronic catarrhal gingivitis in children 3-13 years old in Plovdiv]. Stomatologiia (Sofiia) 1983; 65:5-9. [PMID: 6593946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
|
38
|
Vutov M, Krumova E, Ivanov K, Indzova K. [Incidence of dental caries in children and students from Plovdiv]. Stomatologiia (Sofiia) 1983; 65:1-8. [PMID: 6592801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
|
39
|
Georgiev G, Krumova E, Stoichev M. [Orthopedic treatment of inherited amelogenesis imperfecta]. Stomatologiia (Sofiia) 1979; 61:270-2. [PMID: 299347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
40
|
Vutov M, Krumova E. [Development of dental aid and education in Bulgaria]. Stomatologiia (Sofiia) 1979; 61:133-6. [PMID: 400460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
41
|
Amanasov N, Krumova E. [Aphthous herpetic gingivostomatitis, description of a case]. Stomatologiia (Sofiia) 1979; 61:189-90. [PMID: 299291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
42
|
Giuleva-Peeva D, Krumova E, Katsarov P. [Diagnosis and treatment of lichen planus]. Stomatologiia (Sofiia) 1976; 58:131-6. [PMID: 1077245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|