Institute of Fundamental Technological Research
Polish Academy of Sciences


Jakub Jaroszewicz

Recent publications
1.  Costantini M., Guzowski J., Żuk P.J., Mozetic P., De Panfilis S., Jaroszewicz J., Heljak M., Massimi M., Pierron M., Trombetta M., Dentini M., Święszkowski W., Rainer A., Garstecki P., Barbetta A., Electric Field Assisted Microfluidic Platform for Generation of Tailorable Porous Microbeads as Cell Carriers for Tissue Engineering, Advanced Functional Materials, ISSN: 1616-301X, DOI: 10.1002/adfm.201800874, Vol.28, pp.1800874-1-13, 2018

Injection of cell‐laden scaffolds in the form of mesoscopic particles directly to the site of treatment is one of the most promising approaches to tissue regeneration. Here, a novel and highly efficient method is presented for preparation of porous microbeads of tailorable dimensions (in the range ≈300–1500 mm) and with a uniform and fully interconnected internal porous texture. The method starts with generation of a monodisperse oil‐in‐water emulsion inside a flow‐focusing microfluidic device. This emulsion is later broken‐up, with the use of electric field, into mesoscopic double droplets, that in turn serve as a template for the porous microbeads. By tuning the amplitude and frequency of the electric pulses, the template droplets and the resulting porous bead scaffolds are precisely produced. Furthermore, a model of pulsed electrodripping is proposed that predicts the size of the template droplets as a function of the applied voltage. To prove the potential of the porous microbeads as cell carries, they are tested with human mesenchymal stem cells and hepatic cells, with their viability and degree of microbead colonization being monitored. Finally, the presented porous microbeads are benchmarked against conventional microparticles with nonhomogenous internal texture, revealing their superior performance.

Costantini M. - Sapienza University of Rome (IT)
Guzowski J. - Institute of Physical Chemistry, Polish Academy of Sciences (PL)
Mozetic P. - Università Campus Bio-Medico di Roma (IT)
De Panfilis S. - Sapienza Istituto Italiano di Tecnologia (IT)
Jaroszewicz J. - other affiliation
Heljak M. - Warsaw University of Technology (PL)
Massimi M. - University of L’Aquila (IT)
Pierron M. - Telecom Physique Strasbourg (FR)
Trombetta M. - Università Campus Bio-Medico di Roma (IT)
Dentini M. - Sapienza University of Rome (IT)
Święszkowski W. - other affiliation
Rainer A. - Università Campus Bio-Medico di Roma (IT)
Garstecki P. - Institute of Physical Chemistry, Polish Academy of Sciences (PL)
Barbetta A. - Sapienza University of Rome (IT)
2.  Heljak M.K., Moczulska-Heljak M., Choińska E., Chlanda A., Kosik-Kozioł A., Jaroszewicz T., Jaroszewicz J., Święszkowski W., Micro and nanoscale characterization of poly(DL-lactic-co-glycolic acid) films subjected to the L929 cells and the cyclic mechanical load, Micron, ISSN: 0968-4328, DOI: 10.1016/j.micron.2018.09.004, Vol.115, pp.64-72, 2018

In this paper, the effect of the presence of L929 fibroblast cells and a cyclic load application on the kinetics of the degradation of amorphous PLGA films was examined. Complex micro and nano morphological, mechanical and physico-chemical studies were performed to assess the degradation of the tested material. For this purpose, molecular weight, glass transition temperature, specimen morphology (SEM, μCT) and topography (AFM) as well as the stiffness of the material were measured. The study showed that the presence of living cells along with a mechanical load accelerates the PLGA degradation in comparison to the degradation occurring in acellular media: PBS and DMEM. The drop in molecular weight observed was accompanied by a distinct increase in the tensile modulus and surface roughness, especially in the case of the film degradation in the presence of cells. The suspected cause of the rise in stiffness during the degradation of PLGA films is a reduction in the molecular mobility of the distinctive superficial layer resulting from severe structural changes caused by the surface degradation. In conclusion, all the micro and nanoscale properties of amorphous PLGA considered in the study are sensitive to the presence of L929 cells, as well as to a cyclic load applied during the degradation process.

L929, aliphatic polyester, stiffness rise

Heljak M.K. - Warsaw University of Technology (PL)
Moczulska-Heljak M. - other affiliation
Choińska E. - Warsaw University of Technology (PL)
Chlanda A. - Warsaw University of Technology (PL)
Kosik-Kozioł A. - Warsaw University of Technology (PL)
Jaroszewicz T. - Warsaw University of Technology (PL)
Jaroszewicz J. - other affiliation
Święszkowski W. - other affiliation
3.  Witecka A., Bogucka A., Yamamoto A., Máthis K., Krajňák T., Jaroszewicz J., Święszkowski W., In vitro degradation of ZM21 magnesium alloy in simulated body fluids, Materials Science and Engineering C-Materials for Biological Applications, ISSN: 0928-4931, DOI: 10.1016/j.msec.2016.04.019, Vol.65, pp.59-69, 2016

In vitro degradation behavior of squeeze cast (CAST) and equal channel angular pressed (ECAP) ZM21 magnesium alloy (2.0 wt% Zn-0.98 wt% Mn) was studied using immersion tests up to 4 w in three different biological environments. Hanks' Balanced Salt Solution (Hanks), Earle's Balanced Salt Solution (Earle) and Eagle minimum essential medium supplemented with 10% (v/v) fetal bovine serum (E-MEM + 10% FBS) were used to investigate the effect of carbonate buffer system, organic compounds and material processing on the degradation behavior of the ZM21 alloy samples. Corrosion rate of the samples was evaluated by their Mg2 + ion release, weight loss and volume loss. In the first 24 h, the corrosion rate sequence of the CAST samples was as following: Hanks > E-MEM + 10% FBS > Earle. However, in longer immersion periods, the corrosion rate sequence was Earle > E-MEM + 10% FBS ≥ Hanks. Strong buffering effect provided by carbonate buffer system helped to maintain the pH avoiding drastic increase of the corrosion rate of ZM21 in the initial stage of immersion. Organic compounds also contributed to maintain the pH of the fluid. Moreover, they adsorbed on the sample surface and formed an additional barrier on the insoluble salt layer, which was effective to retard the corrosion of CAST samples. In case of ECAP, however, this effect was overcome by the occurrence of strong localized corrosion due to the lower pH of the medium. Corrosion of ECAP samples was much greater than that of CAST, especially in Hanks, due to higher sensitivity of ECAP to localized corrosion and the presence of Cl−.

The present work demonstrates the importance of using an appropriate solution for a reliable estimation of the degradation rate of Mg-base degradable implants in biological environments, and concludes that the most appropriate solution for this purpose is E-MEM + 10% FBS, which has the closest chemical composition to human blood plasma.

ZM21 magnesium alloy, ECAP, Simulated body fluids, In vitro degradationBicomponent nanofibers, Biodegradation, Biopolymer

Witecka A. - other affiliation
Bogucka A. - Warsaw University of Technology (PL)
Yamamoto A. - National Institute for Materials Science (JP)
Máthis K. - Charles University in Prague (CZ)
Krajňák T. - Charles University in Prague (CZ)
Jaroszewicz J. - other affiliation
Święszkowski W. - other affiliation
4.  Kucharska M., Walenko K., Lewandowska-Szumieł M., Brynk T., Jaroszewicz J., Ciach T., Chitosan and composite microsphere-based scaffold for bone tissue engineering: evaluation of tricalcium phosphate content influence on physical and biological properties, JOURNAL OF MATERIALS SCIENCE, ISSN: 0022-2461, DOI: 10.1007/s10856-015-5464-9, Vol.26, No.143, pp.1-12, 2015

In the hereby presented work the authors describe a technique of high-compression-resistant biodegradable bone scaffold preparation. The methodology is based on the agglomeration of chitosan (CH) and chitosan/β-tricalcium phosphate (CH/TCP) microspheres and represents a novel approach to 3D matrices design for bone tissue engineering application. The materials were prepared from high deacetylation degree chitosan. The authors describe the method for scaffold fabrication, essential properties of the materials manufactured and the influence of various TCP concentrations on material morphology, mechanical properties (for dry and hydrated materials) and preliminary study on the interaction between CH or CH/TCP scaffolds and within cultured MG-63 osteoblast-like cells. The properties of the obtained materials were significantly affected by the calcium phosphate content, which had a particular influence on the granule microstructure, size distribution and inner biomaterial pore size. The water uptake ability was found to be lower for the materials enriched with the inorganic phase and tended to decrease with the increasing calcium phosphate concentration. The evaluation of mechanical properties has revealed that scaffolds produced with the usage of granule-based technology display a potential to be used as a load-bearing material since the Young’s modulus values were limited to the range of 200–500 MPa for dry materials and 15–20 MPa for the hydrated state of the scaffolds. The cell number, identified in three time points (48 h, 7 and 14 days) by Pico Green assay, was lower for the materials enriched with inorganic phase (75 % of control), however cell distribution, when compared to CH only biomaterial, was acknowledged as steadier on the surface of the material containing the highest calcium phosphate concentration.

Kucharska M. - other affiliation
Walenko K. - other affiliation
Lewandowska-Szumieł M. - other affiliation
Brynk T. - Warsaw University of Technology (PL)
Jaroszewicz J. - other affiliation
Ciach T. - Warsaw University of Technology (PL)

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