TY  - JOUR
AU  - Ponjavić, Marijana
AU  - Malagurski, Ivana
AU  - Lazić, Jelena
AU  - Jeremić, Sanja
AU  - Pavlović, Vladimir
AU  - Prlainović, Nevena
AU  - Maksimović, Vesna
AU  - Ćosović, Vladan
AU  - Atanase, Leonard Ionut
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5690
AB  - The quest for sustainable biomaterials with excellent biocompatibility and tailorable
properties has put polyhydroxyalkanoates (PHAs) into the research spotlight. However, high production
costs and the lack of bioactivity limit their market penetration. To address this, poly(3-
hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was combined with a bacterial pigment with strong
anticancer activity, prodigiosin (PG), to obtain functionally enhanced PHBV-based biomaterials. The
samples were produced in the form of films 115.6–118.8  m in thickness using the solvent casting
method. The effects of PG incorporation on the physical properties (morphology, biopolymer crystallinity
and thermal stability) and functionality of the obtained biomaterials were investigated. PG
has acted as a nucleating agent, in turn affecting the degree of crystallinity, thermal stability and
morphology of the films. All samples with PG had a more organized internal structure and higher
melting and degradation temperatures. The calculated degree of crystallinity of the PHBV copolymer
was 53%, while the PG1, PG3 and PG3 films had values of 64.0%, 63.9% and 69.2%, respectively.
Cytotoxicity studies have shown the excellent anticancer activity of films against HCT116 (colon
cancer) cells, thus advancing PHBV biomedical application potential.
PB  - Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)
T2  - International Journal of Molecular Sciences
T1  - Advancing PHBV Biomedical Potential with the Incorporation of Bacterial Biopigment Prodigiosin
VL  - 24
SP  - 1906
DO  - 10.3390/ijms24031906
ER  - 

@article{
author = "Ponjavić, Marijana and Malagurski, Ivana and Lazić, Jelena and Jeremić, Sanja and Pavlović, Vladimir and Prlainović, Nevena and Maksimović, Vesna and Ćosović, Vladan and Atanase, Leonard Ionut",
year = "2023",
abstract = "The quest for sustainable biomaterials with excellent biocompatibility and tailorable
properties has put polyhydroxyalkanoates (PHAs) into the research spotlight. However, high production
costs and the lack of bioactivity limit their market penetration. To address this, poly(3-
hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was combined with a bacterial pigment with strong
anticancer activity, prodigiosin (PG), to obtain functionally enhanced PHBV-based biomaterials. The
samples were produced in the form of films 115.6–118.8  m in thickness using the solvent casting
method. The effects of PG incorporation on the physical properties (morphology, biopolymer crystallinity
and thermal stability) and functionality of the obtained biomaterials were investigated. PG
has acted as a nucleating agent, in turn affecting the degree of crystallinity, thermal stability and
morphology of the films. All samples with PG had a more organized internal structure and higher
melting and degradation temperatures. The calculated degree of crystallinity of the PHBV copolymer
was 53%, while the PG1, PG3 and PG3 films had values of 64.0%, 63.9% and 69.2%, respectively.
Cytotoxicity studies have shown the excellent anticancer activity of films against HCT116 (colon
cancer) cells, thus advancing PHBV biomedical application potential.",
publisher = "Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)",
journal = "International Journal of Molecular Sciences",
title = "Advancing PHBV Biomedical Potential with the Incorporation of Bacterial Biopigment Prodigiosin",
volume = "24",
pages = "1906",
doi = "10.3390/ijms24031906"
}

Ponjavić, M., Malagurski, I., Lazić, J., Jeremić, S., Pavlović, V., Prlainović, N., Maksimović, V., Ćosović, V.,& Atanase, L. I.. (2023). Advancing PHBV Biomedical Potential with the Incorporation of Bacterial Biopigment Prodigiosin. in International Journal of Molecular Sciences
Switzerland : Multidisciplinary Digital Publishing Institute (MDPI)., 24, 1906.
https://doi.org/10.3390/ijms24031906

Ponjavić M, Malagurski I, Lazić J, Jeremić S, Pavlović V, Prlainović N, Maksimović V, Ćosović V, Atanase LI. Advancing PHBV Biomedical Potential with the Incorporation of Bacterial Biopigment Prodigiosin. in International Journal of Molecular Sciences. 2023;24:1906.
doi:10.3390/ijms24031906 .

Ponjavić, Marijana, Malagurski, Ivana, Lazić, Jelena, Jeremić, Sanja, Pavlović, Vladimir, Prlainović, Nevena, Maksimović, Vesna, Ćosović, Vladan, Atanase, Leonard Ionut, "Advancing PHBV Biomedical Potential with the Incorporation of Bacterial Biopigment Prodigiosin" in International Journal of Molecular Sciences, 24 (2023):1906,
https://doi.org/10.3390/ijms24031906 . .

TY  - JOUR
AU  - Atanase, Leonard Ionut
AU  - Salhi, Slim
AU  - Cucoveica, Oana
AU  - Ponjavić, Marijana
AU  - Nikodinović-Runić, Jasmina
AU  - Delaite, Christelle
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5581
AB  - Biodegradable polymers contain chains that are hydrolytically or enzymatically cleaved, resulting in soluble degradation products. Biodegradability is particularly desired in biomedical applications, in which degradation of the polymer ensures clearance from the body and eliminates the need for retrieval or explant. In this study, a homologues series of poly(ε-caprolactone)-b-poly(ethylene adipate)-b-poly(ε-caprolactone) (PCL-b-PEA-b-PCL) block copolymers, with constant PEA molar mass and different PCL sequence lengths was obtained. The starting point of these copolymers was a dihydroxy-PEA precursor with a molar mass (Mn) of 2500 g/mol. Mn values of the PCL varied between 1000 and 10,000 g/mol. Both the precursors and the copolymers were characterized using different physicochemical methods, such as: NMR, SEC, Maldi-TOFF, DSC, and ATG. The molecular characteristics of the copolymers were in a direct correlation with the sequence length of the PCL. Enzymatic degradability studies were also conducted by using cell-free extract containing Pseudomonas aeruginosa PAO1 for 10 and 21 days, and it appeared that the presence of the PEA central sequence has an important influence on the biodegradability of the copolymer samples. In fact, copolymer PCL7000-PEA2500-PCL7000 had a weight loss of around 50% after 10 days whereas the weight loss of the homopolymer PCL, with a similar Mn of 14,000 g/mol, was only 6%. The results obtained in this study indicate that these copolymer samples can be further used for the preparation of drug delivery systems with modulated biodegradability.
PB  - MDPI AG
T2  - Polymers
T1  - Biodegradability Assessment of Polyester Copolymers Based on Poly(ethylene adipate) and Poly(ε-caprolactone)
VL  - 14
IS  - 18
SP  - 3736
DO  - 10.3390/polym14183736
ER  - 

@article{
author = "Atanase, Leonard Ionut and Salhi, Slim and Cucoveica, Oana and Ponjavić, Marijana and Nikodinović-Runić, Jasmina and Delaite, Christelle",
year = "2022",
abstract = "Biodegradable polymers contain chains that are hydrolytically or enzymatically cleaved, resulting in soluble degradation products. Biodegradability is particularly desired in biomedical applications, in which degradation of the polymer ensures clearance from the body and eliminates the need for retrieval or explant. In this study, a homologues series of poly(ε-caprolactone)-b-poly(ethylene adipate)-b-poly(ε-caprolactone) (PCL-b-PEA-b-PCL) block copolymers, with constant PEA molar mass and different PCL sequence lengths was obtained. The starting point of these copolymers was a dihydroxy-PEA precursor with a molar mass (Mn) of 2500 g/mol. Mn values of the PCL varied between 1000 and 10,000 g/mol. Both the precursors and the copolymers were characterized using different physicochemical methods, such as: NMR, SEC, Maldi-TOFF, DSC, and ATG. The molecular characteristics of the copolymers were in a direct correlation with the sequence length of the PCL. Enzymatic degradability studies were also conducted by using cell-free extract containing Pseudomonas aeruginosa PAO1 for 10 and 21 days, and it appeared that the presence of the PEA central sequence has an important influence on the biodegradability of the copolymer samples. In fact, copolymer PCL7000-PEA2500-PCL7000 had a weight loss of around 50% after 10 days whereas the weight loss of the homopolymer PCL, with a similar Mn of 14,000 g/mol, was only 6%. The results obtained in this study indicate that these copolymer samples can be further used for the preparation of drug delivery systems with modulated biodegradability.",
publisher = "MDPI AG",
journal = "Polymers",
title = "Biodegradability Assessment of Polyester Copolymers Based on Poly(ethylene adipate) and Poly(ε-caprolactone)",
volume = "14",
number = "18",
pages = "3736",
doi = "10.3390/polym14183736"
}

Atanase, L. I., Salhi, S., Cucoveica, O., Ponjavić, M., Nikodinović-Runić, J.,& Delaite, C.. (2022). Biodegradability Assessment of Polyester Copolymers Based on Poly(ethylene adipate) and Poly(ε-caprolactone). in Polymers
MDPI AG., 14(18), 3736.
https://doi.org/10.3390/polym14183736

Atanase LI, Salhi S, Cucoveica O, Ponjavić M, Nikodinović-Runić J, Delaite C. Biodegradability Assessment of Polyester Copolymers Based on Poly(ethylene adipate) and Poly(ε-caprolactone). in Polymers. 2022;14(18):3736.
doi:10.3390/polym14183736 .

Atanase, Leonard Ionut, Salhi, Slim, Cucoveica, Oana, Ponjavić, Marijana, Nikodinović-Runić, Jasmina, Delaite, Christelle, "Biodegradability Assessment of Polyester Copolymers Based on Poly(ethylene adipate) and Poly(ε-caprolactone)" in Polymers, 14, no. 18 (2022):3736,
https://doi.org/10.3390/polym14183736 . .