1
|
Novotny T, Eckhardt A, Doubkova M, Knitlova J, Vondrasek D, Vanaskova E, Ostadal M, Uhlik J, Bacakova L, Musilkova J. The possible role of hypoxia in the affected tissue of relapsed clubfoot. Sci Rep 2022; 12:4462. [PMID: 35292718 PMCID: PMC8924187 DOI: 10.1038/s41598-022-08519-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 03/07/2022] [Indexed: 02/07/2023] Open
Abstract
Our aim was to study the expression of hypoxia-related proteins as a possible regulatory pathway in the contracted side tissue of relapsed clubfoot. We compared the expression of hypoxia-related proteins in the tissue of the contracted (medial) side of relapsed clubfoot, and in the tissue of the non-contracted (lateral) side of relapsed clubfoot. Tissue samples from ten patients were analyzed by immunohistochemistry and image analysis, Real-time PCR and Mass Spectrometry to evaluate the differences in protein composition and gene expression. We found a significant increase in the levels of smooth muscle actin, transforming growth factor-beta, hypoxia-inducible factor 1 alpha, lysyl oxidase, lysyl oxidase-like 2, tenascin C, matrix metalloproteinase-2, matrix metalloproteinase-9, fibronectin, collagen types III and VI, hemoglobin subunit alpha and hemoglobin subunit beta, and an overexpression of ACTA2, FN1, TGFB1, HIF1A and MMP2 genes in the contracted medial side tissue of clubfoot. In the affected tissue, we have identified an increase in the level of hypoxia-related proteins, together with an overexpression of corresponding genes. Our results suggest that the hypoxia-associated pathway is potentially a factor contributing to the etiology of clubfoot relapses, as it stimulates both angioproliferation and fibroproliferation, which are considered to be key factors in the progression and development of relapses.
Collapse
Affiliation(s)
- Tomas Novotny
- Department of Orthopaedics, University J.E. Purkinje and Masaryk Hospital, Usti nad Labem, Czech Republic.,Department of Histology and Embryology, Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Adam Eckhardt
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic.
| | - Martina Doubkova
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic. .,Second Faculty of Medicine, Charles University, Prague, Czech Republic.
| | - Jarmila Knitlova
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - David Vondrasek
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic.,Faculty of Physical Education and Sport, Charles University, Prague, Czech Republic
| | - Eliska Vanaskova
- Department of Orthopaedics, University J.E. Purkinje and Masaryk Hospital, Usti nad Labem, Czech Republic
| | - Martin Ostadal
- Department of Orthopaedics, University Hospital Bulovka, Charles University, Prague, Czech Republic
| | - Jiri Uhlik
- Department of Histology and Embryology, Second Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Lucie Bacakova
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Jana Musilkova
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| |
Collapse
|
2
|
Increased Collagen Crosslinking in Stiff Clubfoot Tissue: Implications for the Improvement of Therapeutic Strategies. Int J Mol Sci 2021; 22:ijms222111903. [PMID: 34769331 PMCID: PMC8584281 DOI: 10.3390/ijms222111903] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 10/26/2021] [Accepted: 10/29/2021] [Indexed: 12/16/2022] Open
Abstract
Congenital clubfoot is a complex musculoskeletal deformity, in which a stiff, contracted tissue forms in the medial part of the foot. Fibrotic changes are associated with increased collagen deposition and lysyl oxidase (LOX)-mediated crosslinking, which impair collagen degradation and increase the tissue stiffness. First, we studied collagen deposition, as well as the expression of collagen and the amount of pyridinoline and deoxypyridinoline crosslinks in the tissue of relapsed clubfoot by immunohistochemistry, real-time PCR, and enzyme-linked immunosorbent assay (ELISA). We then isolated fibroblast-like cells from the contracted tissue to study the potential inhibition of these processes in vitro. We assessed the effects of a LOX inhibitor, β-aminopropionitrile (BAPN), on the cells by a hydroxyproline assay, ELISA, and Second Harmonic Generation imaging. We also evaluated the cell-mediated contraction of extracellular matrix in 3D cell-populated collagen gels. For the first time, we have confirmed significantly increased crosslinking and excessive collagen type I deposition in the clubfoot-contracted tissue. We successfully reduced these processes in vitro in a dose-dependent manner with 10–40 µg/mL of BAPN, and we observed an increasing trend in the inhibition of the cell-mediated contraction of collagen gels. The in vitro inhibitory effects indicate that BAPN has good potential for the treatment of relapsed and resistant clubfeet.
Collapse
|
3
|
Response to: "Quantity," "Quality" and "Distribution Pattern" of Neo Vascular System: Is it the Time to Come Back to Aristotle Categories? J Pediatr Orthop 2021; 41:e199-e200. [PMID: 33003066 DOI: 10.1097/bpo.0000000000001683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
4
|
"Quantity," "Quality," and "Distribution Pattern" of Neovascular System: Is It the Time to Come Back to Aristotle Categories? J Pediatr Orthop 2021; 41:e199. [PMID: 32852368 DOI: 10.1097/bpo.0000000000001671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|