title: Porous 3D implants of degradable poly-3-hydroxybutyrate used to enhance regeneration of rat cranial defect.
abstract: The study describes preparation and testing of porous 3D implants of natural degradable polymer of 3-hydroxybutyric acid P(3HB) for regeneration of bone tissue defects. The ability of the P(3HB) implants to favor attachment and facilitate proliferation and directed differentiation of mesenchymal stem cells (MSCs) was studied in the culture of MSCs isolated from bone marrow and adipose tissue. Tissue-engineered hybrid systems (grafts) constructed using P(3HB) and P(3HB) in combination with osteoblasts were used in experiments on laboratory animals (n = 48) with bone defect model. The defect model (5 mm in diameter) was created in the rat parietal bone, and filling of the defect by the new bone tissue was monitored in the groups of animals with P(3HB) implants, with commercial material, and without implants (negative control). Computed tomography (CT) and histologic examination showed that after 120 days, in the group with the osteoblast-seeded P(3HB) implants, the defect was completely closed; in the group with the cell-free P(3HB) implants, the remaining defect was no more than 10% of the initial one (0.5 mm); in both the negative and positive controls, the size of the defect was about 1.0-1.2 mm. These results suggest that P(3HB) has good potential as osteoplastic material for reconstructive osteogenesis. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 566-577, 2017.
authors.affiliation: Siberian Federal University, 79 Svobodnyi Avenue, Krasnoyarsk, 660041.|Institute of Biophysics of Siberian Branch of Russian Academy of Sciences. Akademgorodok, Krasnoyarsk, 660036.
authors.forename: A A
authors.initials: AA
authors.lastname: Shumilova
authors.affiliation: V.F. Voino-Yasenetsky Krasnoyarsk State Medical University, 1 Partizan Zheleznyak Street, Krasnoyarsk, 660022.
authors.forename: M P
authors.initials: MP
authors.lastname: Myltygashev
authors.affiliation: V.F. Voino-Yasenetsky Krasnoyarsk State Medical University, 1 Partizan Zheleznyak Street, Krasnoyarsk, 660022.
authors.forename: A K
authors.initials: AK
authors.lastname: Kirichenko
authors.affiliation: Siberian Federal University, 79 Svobodnyi Avenue, Krasnoyarsk, 660041.
authors.forename: E D
authors.initials: ED
authors.lastname: Nikolaeva
authors.affiliation: Siberian Federal University, 79 Svobodnyi Avenue, Krasnoyarsk, 660041.|Institute of Biophysics of Siberian Branch of Russian Academy of Sciences. Akademgorodok, Krasnoyarsk, 660036.
authors.forename: T G
authors.initials: TG
authors.lastname: Volova
authors.affiliation: Siberian Federal University, 79 Svobodnyi Avenue, Krasnoyarsk, 660041.|Institute of Biophysics of Siberian Branch of Russian Academy of Sciences. Akademgorodok, Krasnoyarsk, 660036.
authors.forename: E I
authors.initials: EI
authors.lastname: Shishatskaya
mesh_terms: D020341:Absorbable Implants; D000818:Animals; D001861:Bone Regeneration / Q000187:drug effects*; D018786:Bone Substitutes / Q000737:chemistry / Q000494:pharmacology; D006885:Hydroxybutyrates / Q000737:chemistry / Q000494:pharmacology; D011091:Polyesters / Q000737:chemistry / Q000494:pharmacology; D016062:Porosity; D051381:Rats; D017208:Rats, Wistar; D012886:Skull / Q000293:injuries / Q000378:metabolism / Q000473:pathology; D000094122:Polyhydroxybutyrates
chemical_list: D018786:Bone Substitutes; D006885:Hydroxybutyrates; D011091:Polyesters; C003182:poly-beta-hydroxybutyrate; D000094122:Polyhydroxybutyrates
keywords: 3D implants; MSC differentiation; grafts for osteogenesis; poly-3-hydroxybutyrate; regeneration of defect cranial