TY  - JOUR
AU  - Spasojević, Dragica
AU  - Zmejkoski, Danica
AU  - Milčić Matić, Natalija
AU  - Krnjaić, Dejan
AU  - Radotić, Ksenija
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11589
AB  - Bacterial infections and resistance to antibiotics are increasingly severe problems. In recent years, Staphylococcus species have emerged as important pathogens in animals and humans. Current therapeutic methods against these species have serious disadvantages; therefore new agents with antibacterial potential, such as plant-based substances, are very important in therapy. We report a pilot study with new method of fractioning the dehydrogenate polymer DHP obtained from coniferyl alcohol and application of the low-MW fractions of 200–3000 Da for antibacterial activity in healing animal lesions. In vivo experiments were conducted on the dogs having a skin lesion. Dogs were treated with the suspension containing the low-MW DHP fractions as the active ingredient, in combination with alginate for 7 days. Cytological smears and microbiological analyses of the affected area were performed. Staphylococcus spp. was isolated from lesions in all dogs from our research. The results show that the low-MW DHP suspension in alginate promotes skin healing and reduction of the infection of the lesions in the affected animals. Pharmaceutical composition containing the low-MW DHP fractions exerts a soothing effect on the subject in wound treatment. Reduction in the number of bacteria by 30% and more were noticed in 6 dogs, while in 4 dogs this percentage is above 50%. No side effects were noticed. Synthesized lignin oligomers may have a significant place as antimicrobial and skin healing agents, especially since an increasing number of multidrug-resistant staphylococci are found on the skin lesions in animals.
T2  - Veterinary Research Communications
T1  - Therapeutic potential of low-molecular weight lignin model polymer fractions for treating skin lesions in animals: a pilot study
DO  - 10.1007/s11259-023-10224-9
ER  - 

@article{
author = "Spasojević, Dragica and Zmejkoski, Danica and Milčić Matić, Natalija and Krnjaić, Dejan and Radotić, Ksenija",
year = "2023",
abstract = "Bacterial infections and resistance to antibiotics are increasingly severe problems. In recent years, Staphylococcus species have emerged as important pathogens in animals and humans. Current therapeutic methods against these species have serious disadvantages; therefore new agents with antibacterial potential, such as plant-based substances, are very important in therapy. We report a pilot study with new method of fractioning the dehydrogenate polymer DHP obtained from coniferyl alcohol and application of the low-MW fractions of 200–3000 Da for antibacterial activity in healing animal lesions. In vivo experiments were conducted on the dogs having a skin lesion. Dogs were treated with the suspension containing the low-MW DHP fractions as the active ingredient, in combination with alginate for 7 days. Cytological smears and microbiological analyses of the affected area were performed. Staphylococcus spp. was isolated from lesions in all dogs from our research. The results show that the low-MW DHP suspension in alginate promotes skin healing and reduction of the infection of the lesions in the affected animals. Pharmaceutical composition containing the low-MW DHP fractions exerts a soothing effect on the subject in wound treatment. Reduction in the number of bacteria by 30% and more were noticed in 6 dogs, while in 4 dogs this percentage is above 50%. No side effects were noticed. Synthesized lignin oligomers may have a significant place as antimicrobial and skin healing agents, especially since an increasing number of multidrug-resistant staphylococci are found on the skin lesions in animals.",
journal = "Veterinary Research Communications",
title = "Therapeutic potential of low-molecular weight lignin model polymer fractions for treating skin lesions in animals: a pilot study",
doi = "10.1007/s11259-023-10224-9"
}

Spasojević, D., Zmejkoski, D., Milčić Matić, N., Krnjaić, D.,& Radotić, K.. (2023). Therapeutic potential of low-molecular weight lignin model polymer fractions for treating skin lesions in animals: a pilot study. in Veterinary Research Communications.
https://doi.org/10.1007/s11259-023-10224-9

Spasojević D, Zmejkoski D, Milčić Matić N, Krnjaić D, Radotić K. Therapeutic potential of low-molecular weight lignin model polymer fractions for treating skin lesions in animals: a pilot study. in Veterinary Research Communications. 2023;.
doi:10.1007/s11259-023-10224-9 .

Spasojević, Dragica, Zmejkoski, Danica, Milčić Matić, Natalija, Krnjaić, Dejan, Radotić, Ksenija, "Therapeutic potential of low-molecular weight lignin model polymer fractions for treating skin lesions in animals: a pilot study" in Veterinary Research Communications (2023),
https://doi.org/10.1007/s11259-023-10224-9 . .

TY  - CHAP
AU  - Radotić, Ksenija
AU  - Spasojević, Dragica
AU  - Zmejkoski, Danica
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12987
AB  - The material selected for biomedical application must be biocompatible, stable against physiological media, non-toxic, non-carcinogenic, corrosion-resistant, bio-inert, and stimuli-responsive, and have a low wear rate. Lignin is the most abundant aromatic polymer on Earth with a complex, recalcitrant structure. A lot of knowledge is acquired on its pre-treatments and processing for biomedical uses in the forms of hydrogels, films, composite materials, nanoparticles, and aerogels. To avoid the potential toxicity and to control the cytotoxicity of lignin-based materials, it is necessary to increase the purity of the starting source materials and understand their reactivity. The poor water solubility, broad molecular weight (MW) distribution, and highly complex structure of lignin restrict its wider clinical applications. These limitations may be effectively improved by chemical modifications or by using lignin fractions with a narrow MW range. Antioxidant and antimicrobial properties allow lignin to be used in pharmaceuticals, drug delivery, and wound healing. It is also reported as a good candidate for composite materials intended for bone regeneration scaffolds in tissue engineering. Future challenges for lignin-based materials for biomedical applications include achieving a better understanding of the structure, isolation, and batch properties of lignin, as well as structure–function relationships in its applications.
PB  - The Royal Society of Chemistry
T2  - Lignin-based Materials: Health Care and Medical Applications
T1  - Lignin-based material for biomedical applications: Basic requirements and properties
SP  - 85
EP  - 105
DO  - 10.1039/BK9781839167843-00085
ER  - 

@inbook{
author = "Radotić, Ksenija and Spasojević, Dragica and Zmejkoski, Danica",
year = "2023",
abstract = "The material selected for biomedical application must be biocompatible, stable against physiological media, non-toxic, non-carcinogenic, corrosion-resistant, bio-inert, and stimuli-responsive, and have a low wear rate. Lignin is the most abundant aromatic polymer on Earth with a complex, recalcitrant structure. A lot of knowledge is acquired on its pre-treatments and processing for biomedical uses in the forms of hydrogels, films, composite materials, nanoparticles, and aerogels. To avoid the potential toxicity and to control the cytotoxicity of lignin-based materials, it is necessary to increase the purity of the starting source materials and understand their reactivity. The poor water solubility, broad molecular weight (MW) distribution, and highly complex structure of lignin restrict its wider clinical applications. These limitations may be effectively improved by chemical modifications or by using lignin fractions with a narrow MW range. Antioxidant and antimicrobial properties allow lignin to be used in pharmaceuticals, drug delivery, and wound healing. It is also reported as a good candidate for composite materials intended for bone regeneration scaffolds in tissue engineering. Future challenges for lignin-based materials for biomedical applications include achieving a better understanding of the structure, isolation, and batch properties of lignin, as well as structure–function relationships in its applications.",
publisher = "The Royal Society of Chemistry",
journal = "Lignin-based Materials: Health Care and Medical Applications",
booktitle = "Lignin-based material for biomedical applications: Basic requirements and properties",
pages = "85-105",
doi = "10.1039/BK9781839167843-00085"
}

Radotić, K., Spasojević, D.,& Zmejkoski, D.. (2023). Lignin-based material for biomedical applications: Basic requirements and properties. in Lignin-based Materials: Health Care and Medical Applications
The Royal Society of Chemistry., 85-105.
https://doi.org/10.1039/BK9781839167843-00085

Radotić K, Spasojević D, Zmejkoski D. Lignin-based material for biomedical applications: Basic requirements and properties. in Lignin-based Materials: Health Care and Medical Applications. 2023;:85-105.
doi:10.1039/BK9781839167843-00085 .

Radotić, Ksenija, Spasojević, Dragica, Zmejkoski, Danica, "Lignin-based material for biomedical applications: Basic requirements and properties" in Lignin-based Materials: Health Care and Medical Applications (2023):85-105,
https://doi.org/10.1039/BK9781839167843-00085 . .

TY  - JOUR
AU  - Mitrović, Aleksandra Lj.
AU  - Simonović-Radosavljević, Jasna
AU  - Prokopijević, Miloš
AU  - Spasojević, Dragica
AU  - Kovačević, Jovana
AU  - Prodanović, Olivera
AU  - Todorović, Bratislav
AU  - Matović, Branko
AU  - Stanković, Mira
AU  - Maksimović, Vuk
AU  - Mutavdžić, Dragosav
AU  - Skočić, Miloš
AU  - Pešić, Mirjana
AU  - Prokić, Ljiljana
AU  - Radotić, Ksenija
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9129
AB  - The UV-B represents the minor fraction of the solar spectrum, while UV-C is not contained in natural solar radiation, but both radiation types can cause damaging effects in plants. Cell walls (CWs) are one of the targets for external stressors. Juvenile P. omorika trees were treated either with 21 day-high doses UV-B or with 7 day- UV-C in open-top chambers. Using spectroscopic and biochemical techniques, it was shown that the response to UV radiation includes numerous modifications in needle CW structure: relative content of xylan, xyloglucan, lignin and cellulose decreased; cellulose crystallinity changed; yield of lignin monomers with stronger connection of C[dbnd]C in side chain with the ring increased; re-distribution of inter- and intra-polymer H-bonds occurred. The recovery was mediated by an increase in the activities and changes in isoform profiles of CW bound covalent peroxidases (POD) and polyphenol oxidases (PO) (UV–B), and ionic POD and covalent PO (UV–C). A connection between activities of specific POD/PO isoforms and phenolic species (m- and p-coumaric acid, pinoresinol and cinnamic acid derivatives) was demonstrated, and supported by changes in the sRNA profile. In vivo fluorometry showed phenolics accumulation in needle epidermal CWs. These results imply transversal connections between polymers and changed mechanical properties of needle CW as a response to UV. The CW alterations enabled maintenance of physiological functions, as indicated by the preserved chlorophyll content and/or organization. The current study provides evidence that in conifers, needle CW response to both UV-B and UV-C includes biochemical modifications and structural remodeling. © 2021 Elsevier Masson SAS
T2  - Plant Physiology and Biochemistry
T1  - Cell wall response to UV radiation in needles of Picea omorika
VL  - 161
SP  - 176
EP  - 190
DO  - 10.1016/j.plaphy.2021.02.007
ER  - 

@article{
author = "Mitrović, Aleksandra Lj. and Simonović-Radosavljević, Jasna and Prokopijević, Miloš and Spasojević, Dragica and Kovačević, Jovana and Prodanović, Olivera and Todorović, Bratislav and Matović, Branko and Stanković, Mira and Maksimović, Vuk and Mutavdžić, Dragosav and Skočić, Miloš and Pešić, Mirjana and Prokić, Ljiljana and Radotić, Ksenija",
year = "2021",
abstract = "The UV-B represents the minor fraction of the solar spectrum, while UV-C is not contained in natural solar radiation, but both radiation types can cause damaging effects in plants. Cell walls (CWs) are one of the targets for external stressors. Juvenile P. omorika trees were treated either with 21 day-high doses UV-B or with 7 day- UV-C in open-top chambers. Using spectroscopic and biochemical techniques, it was shown that the response to UV radiation includes numerous modifications in needle CW structure: relative content of xylan, xyloglucan, lignin and cellulose decreased; cellulose crystallinity changed; yield of lignin monomers with stronger connection of C[dbnd]C in side chain with the ring increased; re-distribution of inter- and intra-polymer H-bonds occurred. The recovery was mediated by an increase in the activities and changes in isoform profiles of CW bound covalent peroxidases (POD) and polyphenol oxidases (PO) (UV–B), and ionic POD and covalent PO (UV–C). A connection between activities of specific POD/PO isoforms and phenolic species (m- and p-coumaric acid, pinoresinol and cinnamic acid derivatives) was demonstrated, and supported by changes in the sRNA profile. In vivo fluorometry showed phenolics accumulation in needle epidermal CWs. These results imply transversal connections between polymers and changed mechanical properties of needle CW as a response to UV. The CW alterations enabled maintenance of physiological functions, as indicated by the preserved chlorophyll content and/or organization. The current study provides evidence that in conifers, needle CW response to both UV-B and UV-C includes biochemical modifications and structural remodeling. © 2021 Elsevier Masson SAS",
journal = "Plant Physiology and Biochemistry",
title = "Cell wall response to UV radiation in needles of Picea omorika",
volume = "161",
pages = "176-190",
doi = "10.1016/j.plaphy.2021.02.007"
}

Mitrović, A. Lj., Simonović-Radosavljević, J., Prokopijević, M., Spasojević, D., Kovačević, J., Prodanović, O., Todorović, B., Matović, B., Stanković, M., Maksimović, V., Mutavdžić, D., Skočić, M., Pešić, M., Prokić, L.,& Radotić, K.. (2021). Cell wall response to UV radiation in needles of Picea omorika. in Plant Physiology and Biochemistry, 161, 176-190.
https://doi.org/10.1016/j.plaphy.2021.02.007

Mitrović AL, Simonović-Radosavljević J, Prokopijević M, Spasojević D, Kovačević J, Prodanović O, Todorović B, Matović B, Stanković M, Maksimović V, Mutavdžić D, Skočić M, Pešić M, Prokić L, Radotić K. Cell wall response to UV radiation in needles of Picea omorika. in Plant Physiology and Biochemistry. 2021;161:176-190.
doi:10.1016/j.plaphy.2021.02.007 .

Mitrović, Aleksandra Lj., Simonović-Radosavljević, Jasna, Prokopijević, Miloš, Spasojević, Dragica, Kovačević, Jovana, Prodanović, Olivera, Todorović, Bratislav, Matović, Branko, Stanković, Mira, Maksimović, Vuk, Mutavdžić, Dragosav, Skočić, Miloš, Pešić, Mirjana, Prokić, Ljiljana, Radotić, Ksenija, "Cell wall response to UV radiation in needles of Picea omorika" in Plant Physiology and Biochemistry, 161 (2021):176-190,
https://doi.org/10.1016/j.plaphy.2021.02.007 . .

TY  - JOUR
AU  - Zmejkoski, Danica
AU  - Spasojević, Dragica
AU  - Orlovska, Irina V.
AU  - Kozyrovska, Natalia O.
AU  - Soković, Marina
AU  - Glamočlija, Jasmina
AU  - Dmitrović, Svetlana
AU  - Matović, Branko
AU  - Tasić, Nikola B.
AU  - Maksimović, Vuk M.
AU  - Sosnin, Mikhail
AU  - Radotić, Ksenija
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7769
AB  - Lignins and lignin-derived compounds are known to have antibacterial properties. The wound healing agents in the form of dressings produce faster skin repair and decrease pain in patients. In order to create an efficient antimicrobial agent in the form of dressing in the treatment of chronic wounds, a composite hydrogel of bacterial cellulose (BC) and dehydrogenative polymer of coniferyl alcohol (DHP), BC-DHP, was designed. Novel composite showed inhibitory or bactericidal effects against selected pathogenic bacteria, including clinically isolated ones. The highest release rate of DHP was in the first hour, while after 24 h there was still slow release of small amounts of DHP from BC-DHP during 72 h monitoring. High-performance liquid chromatography coupled with mass-spectrometry showed that BC-DHP releases DHP oligomers, which are proposed to be antimicrobially active DHP fractions. Scanning electron microscopy and atomic force microscopy micrographs proved a dose-dependent interaction of DHP with BC, which resulted in a decrease of the pore number and size in the cellulose membrane. The Fourier-transform infrared absorption spectra of the BC-DHP showed that DHP was partly bound to the BC matrix. The swelling and crystallinity degree were dose-dependent. All obtained results confirmed BC-DHP composite as a promising hydrogel for wounds healing.
T2  - International Journal of Biological Macromolecules
T1  - Bacterial cellulose-lignin composite hydrogel as a promising agent in chronic wound healing
VL  - 118
SP  - 494
EP  - 503
DO  - 10.1016/j.ijbiomac.2018.06.067
ER  - 

@article{
author = "Zmejkoski, Danica and Spasojević, Dragica and Orlovska, Irina V. and Kozyrovska, Natalia O. and Soković, Marina and Glamočlija, Jasmina and Dmitrović, Svetlana and Matović, Branko and Tasić, Nikola B. and Maksimović, Vuk M. and Sosnin, Mikhail and Radotić, Ksenija",
year = "2018",
abstract = "Lignins and lignin-derived compounds are known to have antibacterial properties. The wound healing agents in the form of dressings produce faster skin repair and decrease pain in patients. In order to create an efficient antimicrobial agent in the form of dressing in the treatment of chronic wounds, a composite hydrogel of bacterial cellulose (BC) and dehydrogenative polymer of coniferyl alcohol (DHP), BC-DHP, was designed. Novel composite showed inhibitory or bactericidal effects against selected pathogenic bacteria, including clinically isolated ones. The highest release rate of DHP was in the first hour, while after 24 h there was still slow release of small amounts of DHP from BC-DHP during 72 h monitoring. High-performance liquid chromatography coupled with mass-spectrometry showed that BC-DHP releases DHP oligomers, which are proposed to be antimicrobially active DHP fractions. Scanning electron microscopy and atomic force microscopy micrographs proved a dose-dependent interaction of DHP with BC, which resulted in a decrease of the pore number and size in the cellulose membrane. The Fourier-transform infrared absorption spectra of the BC-DHP showed that DHP was partly bound to the BC matrix. The swelling and crystallinity degree were dose-dependent. All obtained results confirmed BC-DHP composite as a promising hydrogel for wounds healing.",
journal = "International Journal of Biological Macromolecules",
title = "Bacterial cellulose-lignin composite hydrogel as a promising agent in chronic wound healing",
volume = "118",
pages = "494-503",
doi = "10.1016/j.ijbiomac.2018.06.067"
}

Zmejkoski, D., Spasojević, D., Orlovska, I. V., Kozyrovska, N. O., Soković, M., Glamočlija, J., Dmitrović, S., Matović, B., Tasić, N. B., Maksimović, V. M., Sosnin, M.,& Radotić, K.. (2018). Bacterial cellulose-lignin composite hydrogel as a promising agent in chronic wound healing. in International Journal of Biological Macromolecules, 118, 494-503.
https://doi.org/10.1016/j.ijbiomac.2018.06.067

Zmejkoski D, Spasojević D, Orlovska IV, Kozyrovska NO, Soković M, Glamočlija J, Dmitrović S, Matović B, Tasić NB, Maksimović VM, Sosnin M, Radotić K. Bacterial cellulose-lignin composite hydrogel as a promising agent in chronic wound healing. in International Journal of Biological Macromolecules. 2018;118:494-503.
doi:10.1016/j.ijbiomac.2018.06.067 .

Zmejkoski, Danica, Spasojević, Dragica, Orlovska, Irina V., Kozyrovska, Natalia O., Soković, Marina, Glamočlija, Jasmina, Dmitrović, Svetlana, Matović, Branko, Tasić, Nikola B., Maksimović, Vuk M., Sosnin, Mikhail, Radotić, Ksenija, "Bacterial cellulose-lignin composite hydrogel as a promising agent in chronic wound healing" in International Journal of Biological Macromolecules, 118 (2018):494-503,
https://doi.org/10.1016/j.ijbiomac.2018.06.067 . .

TY  - JOUR
AU  - Spasojević, Dragica
AU  - Zmejkoski, Danica
AU  - Glamočlija, Jasmina
AU  - Nikolić, Miloš M.
AU  - Soković, Marina
AU  - Milošević, Verica
AU  - Jarić, Ivana
AU  - Stojanović, Marijana
AU  - Marinković, Emilija
AU  - Barisani-Asenbauer, Talin
AU  - Prodanović, Radivoje
AU  - Jovanović, Miloš
AU  - Radotić, Ksenija
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1336
AB  - Nowadays bacterial resistance to known antibiotics is a serious health problem. In order to achieve more efficient treatment, lately there is an effort to find new substances, such as certain biomaterials, that are non-toxic to humans with antibiotic potential. Lignins and lignin-derived compounds have been proposed to be good candidates for use in medicine and health maintenance. In this study, the antibacterial activity of the lignin model polymer dehydrogenate polymer (DHP) in alginate hydrogel (Alg) was studied. The obtained results show that DHP-Alg has strong antimicrobial activity against several bacterial strains and biofilms and does not have a toxic effect on human epithelial cells. These results strongly suggest its application as a wound healing agent or as an adjunct substance for wound treatments. (C) 2016 Elsevier B.V. and International Society of Chemotherapy. All rights reserved.
T2  - International Journal of Antimicrobial Agents
T1  - Lignin model compound in alginate hydrogel: a strong antimicrobial agent with high potential in wound treatment
VL  - 48
IS  - 6
SP  - 732
EP  - 735
DO  - 10.1016/j.ijantimicag.2016.08.014
ER  - 

@article{
author = "Spasojević, Dragica and Zmejkoski, Danica and Glamočlija, Jasmina and Nikolić, Miloš M. and Soković, Marina and Milošević, Verica and Jarić, Ivana and Stojanović, Marijana and Marinković, Emilija and Barisani-Asenbauer, Talin and Prodanović, Radivoje and Jovanović, Miloš and Radotić, Ksenija",
year = "2016",
abstract = "Nowadays bacterial resistance to known antibiotics is a serious health problem. In order to achieve more efficient treatment, lately there is an effort to find new substances, such as certain biomaterials, that are non-toxic to humans with antibiotic potential. Lignins and lignin-derived compounds have been proposed to be good candidates for use in medicine and health maintenance. In this study, the antibacterial activity of the lignin model polymer dehydrogenate polymer (DHP) in alginate hydrogel (Alg) was studied. The obtained results show that DHP-Alg has strong antimicrobial activity against several bacterial strains and biofilms and does not have a toxic effect on human epithelial cells. These results strongly suggest its application as a wound healing agent or as an adjunct substance for wound treatments. (C) 2016 Elsevier B.V. and International Society of Chemotherapy. All rights reserved.",
journal = "International Journal of Antimicrobial Agents",
title = "Lignin model compound in alginate hydrogel: a strong antimicrobial agent with high potential in wound treatment",
volume = "48",
number = "6",
pages = "732-735",
doi = "10.1016/j.ijantimicag.2016.08.014"
}

Spasojević, D., Zmejkoski, D., Glamočlija, J., Nikolić, M. M., Soković, M., Milošević, V., Jarić, I., Stojanović, M., Marinković, E., Barisani-Asenbauer, T., Prodanović, R., Jovanović, M.,& Radotić, K.. (2016). Lignin model compound in alginate hydrogel: a strong antimicrobial agent with high potential in wound treatment. in International Journal of Antimicrobial Agents, 48(6), 732-735.
https://doi.org/10.1016/j.ijantimicag.2016.08.014

Spasojević D, Zmejkoski D, Glamočlija J, Nikolić MM, Soković M, Milošević V, Jarić I, Stojanović M, Marinković E, Barisani-Asenbauer T, Prodanović R, Jovanović M, Radotić K. Lignin model compound in alginate hydrogel: a strong antimicrobial agent with high potential in wound treatment. in International Journal of Antimicrobial Agents. 2016;48(6):732-735.
doi:10.1016/j.ijantimicag.2016.08.014 .

Spasojević, Dragica, Zmejkoski, Danica, Glamočlija, Jasmina, Nikolić, Miloš M., Soković, Marina, Milošević, Verica, Jarić, Ivana, Stojanović, Marijana, Marinković, Emilija, Barisani-Asenbauer, Talin, Prodanović, Radivoje, Jovanović, Miloš, Radotić, Ksenija, "Lignin model compound in alginate hydrogel: a strong antimicrobial agent with high potential in wound treatment" in International Journal of Antimicrobial Agents, 48, no. 6 (2016):732-735,
https://doi.org/10.1016/j.ijantimicag.2016.08.014 . .