Saratov JOURNAL of Medical and Scientific Research

biocompatibility

Experimental study of synthetic polymeric materials as a basis in the creation of the advaced carrier matrix for the cultivation of limbal stem cells

Year: 2019, volume 15 Issue: №2 Pages: 495-501
Heading: Ophtalmology Article type: Original article
Authors: Karpovich V.V., Kulikov A.N., Churashov S.V., Chernysh V.F., Grigoriev S.G., Blinova M.I., Nashchekina Yu.A., Aleksandrova O.I., Khorolskaya Yu.I., Nikonov P.O., Tsobkallo E.S., Moskalyuk O.A., Melnikov A.S., Serdobintsev P.Yu., Mashel' T.V., Pisugina G.A., Perepletchikova D.A., Khoroshikh D.A.
Organization: Institute of Cytology, Russian Academy of Sciences, St. Petersburg Polytechnic University, St. Petersburg State University, St. Petersburg State University of Industrial Technology and Design
Summary:

Purpose: to study in the experiment the properties of three diferent types of synthetic polyester matrices, to conduct their comparative assessment and determine the optimum as a carrier for the cultivation and transplantation of limbal stem cells while eliminating limbal insufciency. Material and Methods. Transparency, mechanical properties (strength, elongation at break, modulus of rigidity), biocompatibility with cell cultures of the cornea, as well as the study of the timing of matrix biodegradation in vivo were carried out. Results. The study examined the optical and mechanical properties of matrices made from polylactide-glycolide (PLG), polylactide-caprolactone (PLC) and poly-e-caprolactone (PCL). It was experimentally shown that human and rabbit limbal stem cells, as well as human corneal epithelium cells, adhered on the surface of all types of matrices under investigation, and during cultivation they retained the typical structure of actin cytoskeleton, the ability to proliferate and migrate. Diferences in the interaction of diferent cell cultures with diferent types of carriers were revealed. The terms of biodegradation of PLC matrices with a thickness of 5 μm was about 30 days. Conclusion. The results indicate that it is possible to use 5 μm thick PLC matrices as a carrier of cultured limbal stem cells.

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The estimation of biocompatibility of polycaprolactone matrices mineralized by vat-erite in subcutaneous implantation tests in white rats

Year: 2018, volume 14 Issue: №3 Pages: 451-456
Heading: Physiology and Pathophysiology Article type: Original article
Authors: Ivanov A.N., Kurtukova М.О., Kozadaev M.N., Tyapkina D.A., Kustodov S.V., Saveleva M.S., Bugaeva I.O., Parakhonsky B.V., Galashina E.A., Gladkova E.V., Norkin I.A.
Organization: Saratov National Research University n.a. N. G. Chernyshevsky
Summary:

Aim: to estimate biocompatibility of matrices produced from polycaprolactone (PCL) and mineralized by vaterite (CaC03) by studying local and systemic manifestations of inflammatory reaction in subcutaneous implantation tests in white rats. Material and Methods. The experiment was conducted on 40 rats divided into four equal groups: control, comparison (rats with imitation of implantation), negative control (rats with implanted non-biocompatible matrices) and experimental group, comprised of animals with implanted PCL/CaC03-matrices. Local inflammatory manifestations were analyzed by morphological assay of implantation area tissues. Systemic inflammatory manifestations were estimated by TNF-a concentration and interleukin-lp (IL-1) in blood serum by ELISA. Results. The changes in cellular population content demonstrate that a PCL/CaC03-matriceonthe21 day after the implantation to rats is evenly colonizing by fibroblast cells and vascularizing. This type of matrices does not provoke intense inflammatory reaction seen in negative control animals and accompanied by systemic manifestations such as statistically significant rise in TNF-a and IL-1 concentrations. Conclusion. The data obtained in the study proving the biocompatibility of PLC/CaC03-scaffolds experimentally substantiate the potential for their use in tissue engineering.

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