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Przybyszewska-Podstawka A, Czapiński J, Kałafut J, Rivero-Müller A. Synthetic circuits based on split Cas9 to detect cellular events. Sci Rep 2023; 13:14988. [PMID: 37696879 PMCID: PMC10495424 DOI: 10.1038/s41598-023-41367-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 08/25/2023] [Indexed: 09/13/2023] Open
Abstract
Synthetic biology involves the engineering of logic circuit gates that process different inputs to produce specific outputs, enabling the creation or control of biological functions. While CRISPR has become the tool of choice in molecular biology due to its RNA-guided targetability to other nucleic acids, it has not been frequently applied to logic gates beyond those controlling the guide RNA (gRNA). In this study, we present an adaptation of split Cas9 to generate logic gates capable of sensing biological events, leveraging a Cas9 reporter (EGxxFP) to detect occurrences such as cancer cell origin, epithelial to mesenchymal transition (EMT), and cell-cell fusion. First, we positioned the complementing halves of split Cas9 under different promoters-one specific to cancer cells of epithelial origin (phCEA) and the other a universal promoter. The use of self-assembling inteins facilitated the reconstitution of the Cas9 halves. Consequently, only cancer cells with an epithelial origin activated the reporter, exhibiting green fluorescence. Subsequently, we explored whether this system could detect biological processes such as epithelial to mesenchymal transition (EMT). To achieve this, we designed a logic gate where one half of Cas9 is expressed under the phCEA, while the other is activated by TWIST1. The results showed that cells undergoing EMT effectively activated the reporter. Next, we combined the two inputs (epithelial origin and EMT) to create a new logic gate, where only cancer epithelial cells undergoing EMT activated the reporter. Lastly, we applied the split-Cas9 logic gate as a sensor of cell-cell fusion, both in induced and naturally occurring scenarios. Each cell type expressed one half of split Cas9, and the induction of fusion resulted in the appearance of multinucleated syncytia and the fluorescent reporter. The simplicity of the split Cas9 system presented here allows for its integration into various cellular processes, not only as a sensor but also as an actuator.
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Affiliation(s)
| | - Jakub Czapiński
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-093, Lublin, Poland
| | - Joanna Kałafut
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-093, Lublin, Poland
| | - Adolfo Rivero-Müller
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-093, Lublin, Poland.
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2
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Filipek K, Deryło K, Michalec-Wawiórka B, Zaciura M, González-Ibarra A, Krokowski D, Latoch P, Starosta AL, Czapiński J, Rivero-Müller A, Wawiórka L, Tchórzewski M. Identification of a novel alternatively spliced isoform of the ribosomal uL10 protein. Biochim Biophys Acta Gene Regul Mech 2023; 1866:194890. [PMID: 36328276 DOI: 10.1016/j.bbagrm.2022.194890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 10/06/2022] [Accepted: 10/26/2022] [Indexed: 11/13/2022]
Abstract
Alternative splicing is one of the key mechanisms extending the complexity of genetic information and at the same time adaptability of higher eukaryotes. As a result, the broad spectrum of isoforms produced by alternative splicing allows organisms to fine-tune their proteome; however, the functions of the majority of alternatively spliced protein isoforms are largely unknown. Ribosomal protein isoforms are one of the groups for which data are limited. Here we report characterization of an alternatively spliced isoform of the ribosomal uL10 protein, named uL10β. The uL10 protein constitutes the core element of the ribosomal stalk structure within the GTPase associated center, which represents the landing platform for translational GTPases - trGTPases. The stalk plays an important role in the ribosome-dependent stimulation of GTP by trGTPases, which confer unidirectional trajectory for the ribosome, allosterically contributing to the speed and accuracy of translation. We have shown that the newly identified uL10β protein is stably expressed in mammalian cells and is primarily located within the nuclear compartment with a minor signal within the cytoplasm. Importantly, uL10β is able to bind to the ribosomal particle, but is mainly associated with 60S and 80S particles; additionally, the uL10β undergoes re-localization into the mitochondria upon endoplasmic reticulum stress induction. Our results suggest a specific stress-related dual role of uL10β, supporting the idea of existence of specialized ribosomes with an altered GTPase associated center.
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Affiliation(s)
- Kamil Filipek
- Department of Molecular Biology, Institute of Biological Sciences, Maria Curie-Skłodowska University, Lublin, Poland
| | - Kamil Deryło
- Department of Molecular Biology, Institute of Biological Sciences, Maria Curie-Skłodowska University, Lublin, Poland
| | - Barbara Michalec-Wawiórka
- Department of Molecular Biology, Institute of Biological Sciences, Maria Curie-Skłodowska University, Lublin, Poland
| | - Monika Zaciura
- Department of Molecular Biology, Institute of Biological Sciences, Maria Curie-Skłodowska University, Lublin, Poland
| | - Alan González-Ibarra
- Department of Molecular Biology, Institute of Biological Sciences, Maria Curie-Skłodowska University, Lublin, Poland
| | - Dawid Krokowski
- Department of Molecular Biology, Institute of Biological Sciences, Maria Curie-Skłodowska University, Lublin, Poland
| | - Przemysław Latoch
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw 02-106, Poland; Polish-Japanese Academy of Information Technology, Warsaw 02-008, Poland
| | - Agata L Starosta
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw 02-106, Poland
| | - Jakub Czapiński
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 21-093 Lublin, Poland
| | - Adolfo Rivero-Müller
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 21-093 Lublin, Poland
| | - Leszek Wawiórka
- Department of Molecular Biology, Institute of Biological Sciences, Maria Curie-Skłodowska University, Lublin, Poland
| | - Marek Tchórzewski
- Department of Molecular Biology, Institute of Biological Sciences, Maria Curie-Skłodowska University, Lublin, Poland.
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3
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Kałafut J, Czapiński J, Przybyszewska-Podstawka A, Czerwonka A, Odrzywolski A, Sahlgren C, Rivero-Müller A. Optogenetic control of NOTCH1 signaling. Cell Commun Signal 2022; 20:67. [PMID: 35585598 PMCID: PMC9118860 DOI: 10.1186/s12964-022-00885-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Accepted: 04/19/2022] [Indexed: 11/10/2022] Open
Abstract
The Notch signaling pathway is a crucial regulator of cell differentiation as well as tissue organization, whose deregulation is linked to the pathogenesis of different diseases. NOTCH1 plays a key role in breast cancer progression by increasing proliferation, maintenance of cancer stem cells, and impairment of cell death. NOTCH1 is a mechanosensitive receptor, where mechanical force is required to activate the proteolytic cleavage and release of the Notch intracellular domain (NICD). We circumvent this limitation by regulating Notch activity by light. To achieve this, we have engineered an optogenetic NOTCH1 receptor (optoNotch) to control the activation of NOTCH1 intracellular domain (N1ICD) and its downstream transcriptional activities. Using optoNotch we confirm that NOTCH1 activation increases cell proliferation in MCF7 and MDA-MB-468 breast cancer cells in 2D and spheroid 3D cultures, although causing distinct cell-type specific migratory phenotypes. Additionally, optoNotch activation induced chemoresistance on the same cell lines. OptoNotch allows the fine-tuning, ligand-independent, regulation of N1ICD activity and thus a better understanding of the spatiotemporal complexity of Notch signaling. Video Abstract.
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Affiliation(s)
- Joanna Kałafut
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 21-093, Lublin, Poland
| | - Jakub Czapiński
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 21-093, Lublin, Poland
| | | | - Arkadiusz Czerwonka
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 21-093, Lublin, Poland
| | - Adrian Odrzywolski
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 21-093, Lublin, Poland
| | - Cecilia Sahlgren
- Faculty of Science and Engineering, Biosciences, Åbo Akademi, Turku, Finland.,Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Adolfo Rivero-Müller
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 21-093, Lublin, Poland.
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Michalec-Wawiórka B, Czapiński J, Filipek K, Rulak P, Czerwonka A, Tchórzewski M, Rivero-Müller A. An Improved Vector System for Homogeneous and Stable Gene Regulation. Int J Mol Sci 2021; 22:ijms22105206. [PMID: 34069024 PMCID: PMC8157167 DOI: 10.3390/ijms22105206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/24/2021] [Accepted: 05/08/2021] [Indexed: 11/16/2022] Open
Abstract
Precise analysis of the genetic expression and functioning of proteins requires experimental approaches that, among others, enable tight control of gene expression at the transcriptional level. Doxycycline-induced Tet-On/Tet-Off expression systems provide such an opportunity, and are frequently used to regulate the activity of genes in eukaryotic cells. Since its development, the Tet-system has evolved tight gene control in mammalian cells; however, some challenges are still unaddressed. In the current set up, the establishment of the standard Tet-based system in target cells is time-consuming and laborious and has been shown to be inefficient, especially in a long-term perspective. In this work, we present an optimized inducible expression system, which enables rapid generation of doxycycline-responsive cells according to a one- or two-step protocol. The reported modifications of the Tet-On system expand the toolbox for regulated mammalian gene expression and provide high, stable, and homogenous expression of the Tet-On3G transactivator, which is of fundamental importance in the regulation of transgenes.
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Affiliation(s)
- Barbara Michalec-Wawiórka
- Department of Molecular Biology, Institute of Biological Sciences, Maria Curie-Skłodowska University, 20-033 Lublin, Poland; (K.F.); (P.R.); (M.T.)
- Correspondence:
| | - Jakub Czapiński
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-093 Lublin, Poland; (J.C.); (A.C.); (A.R.-M.)
- Postgraduate School of Molecular Medicine, 02-091 Warsaw, Poland
| | - Kamil Filipek
- Department of Molecular Biology, Institute of Biological Sciences, Maria Curie-Skłodowska University, 20-033 Lublin, Poland; (K.F.); (P.R.); (M.T.)
| | - Patrycja Rulak
- Department of Molecular Biology, Institute of Biological Sciences, Maria Curie-Skłodowska University, 20-033 Lublin, Poland; (K.F.); (P.R.); (M.T.)
| | - Arkadiusz Czerwonka
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-093 Lublin, Poland; (J.C.); (A.C.); (A.R.-M.)
| | - Marek Tchórzewski
- Department of Molecular Biology, Institute of Biological Sciences, Maria Curie-Skłodowska University, 20-033 Lublin, Poland; (K.F.); (P.R.); (M.T.)
| | - Adolfo Rivero-Müller
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-093 Lublin, Poland; (J.C.); (A.C.); (A.R.-M.)
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Tedesco D, Maj M, Malarczyk P, Cingolani A, Zaffagnini M, Wnorowski A, Czapiński J, Benelli T, Mazzoni R, Bartolini M, Jóźwiak K. Application of the SMALP technology to the isolation of GPCRs from low-yielding cell lines. Biochim Biophys Acta Biomembr 2021; 1863:183641. [PMID: 33984320 DOI: 10.1016/j.bbamem.2021.183641] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 04/28/2021] [Accepted: 05/02/2021] [Indexed: 12/21/2022]
Abstract
The ability of styrene-maleic acid (SMAc) co-polymers to spontaneously insert into biological membranes can be exploited to extract G protein-coupled receptors (GPCRs) embedded in styrene-maleic acid lipid particles (SMALPs), preserving the native environment around the protein and thus enhancing the feasibility of functional studies. So far, the SMALP technology has been primarily employed on non-mammalian cells and protocols are not optimized for adherent human cell lines, which cannot be harvested in large amounts. In this work, a fine investigation of key parameters affecting the formation of SMALPs was undertaken with the purpose of maximizing the yield of extraction of a recombinant form of human β2-adrenergic receptor (rhβ2AR) from HEK293T cells. The study highlighted an important influence of ionic strength on the membrane solubilization efficiency and GPCR purification yield of SMAc co-polymers: by lowering the salt concentration of all buffers used in previously published SMALP protocols, the water solubility and extraction efficiency of the selected SMAc co-polymer (commercially supplied as a potassium salt) were enhanced. In-line combination of size-exclusion chromatography (SEC) with immobilized metal affinity chromatography (IMAC) allowed further improvement of the final rhβ2AR yield by reducing the loss of SMALP-embedded GPCRs during the fractionation and purification of SMALPs. The overall findings of this study show that the available SMALP protocols can be significantly optimized in several aspects in order to increase the efficiency of GPCR solubilization and isolation from low-yielding expression systems.
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Affiliation(s)
- Daniele Tedesco
- Department of Pharmacy and Biotechnology, University of Bologna, via Belmeloro 6, Bologna, Italy; Institute for Organic Synthesis and Photoreactivity, National Research Center (ISOF-CNR), via P. Gobetti 101, Bologna, Italy
| | - Maciej Maj
- Department of Biopharmacy, Medical University of Lublin, ulica W. Chodźki 4a, Lublin, Poland
| | - Paulina Malarczyk
- Department of Biopharmacy, Medical University of Lublin, ulica W. Chodźki 4a, Lublin, Poland
| | - Andrea Cingolani
- Department of Industrial Chemistry, University of Bologna, viale del Risorgimento 4, Bologna, Italy
| | - Mirko Zaffagnini
- Department of Pharmacy and Biotechnology, University of Bologna, via Irnerio 42, Bologna, Italy
| | - Artur Wnorowski
- Department of Biopharmacy, Medical University of Lublin, ulica W. Chodźki 4a, Lublin, Poland
| | - Jakub Czapiński
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, ulica W. Chodźki 1, Lublin, Poland; Postgraduate School of Molecular Medicine, Medical University of Warsaw, ulica Żwirki i Wigury 61, Warsaw, Poland
| | - Tiziana Benelli
- Department of Industrial Chemistry, University of Bologna, viale del Risorgimento 4, Bologna, Italy
| | - Rita Mazzoni
- Department of Industrial Chemistry, University of Bologna, viale del Risorgimento 4, Bologna, Italy
| | - Manuela Bartolini
- Department of Pharmacy and Biotechnology, University of Bologna, via Belmeloro 6, Bologna, Italy.
| | - Krzysztof Jóźwiak
- Department of Biopharmacy, Medical University of Lublin, ulica W. Chodźki 4a, Lublin, Poland.
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6
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Kiełbus M, Czapiński J, Kałafut J, Woś J, Stepulak A, Rivero-Müller A. Genetically Engineered Lung Cancer Cells for Analyzing Epithelial-Mesenchymal Transition. Cells 2019; 8:E1644. [PMID: 31847480 PMCID: PMC6953058 DOI: 10.3390/cells8121644] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 12/06/2019] [Accepted: 12/09/2019] [Indexed: 12/13/2022] Open
Abstract
Cell plasticity, defined as the ability to undergo phenotypical transformation in a reversible manner, is a physiological process that also exerts important roles in disease progression. Two forms of cellular plasticity are epithelial-mesenchymal transition (EMT) and its inverse process, mesenchymal-epithelial transition (MET). These processes have been correlated to the poor outcome of different types of neoplasias as well as drug resistance development. Since EMT/MET are transitional processes, we generated and validated a reporter cell line. Specifically, a far-red fluorescent protein was knocked-in in-frame with the mesenchymal gene marker VIMENTIN (VIM) in H2170 lung cancer cells. The vimentin reporter cells (VRCs) are a reliable model for studying EMT and MET showing cellular plasticity upon a series of stimulations. These cells are a robust platform to dissect the molecular mechanisms of these processes, and for drug discovery in vitro and in vivo in the future.
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Affiliation(s)
- Michał Kiełbus
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-093 Lublin, Poland; (M.K.); (J.C.); (J.K.); (A.S.)
| | - Jakub Czapiński
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-093 Lublin, Poland; (M.K.); (J.C.); (J.K.); (A.S.)
- Postgraduate School of Molecular Medicine, 02-091 Warsaw, Poland
| | - Joanna Kałafut
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-093 Lublin, Poland; (M.K.); (J.C.); (J.K.); (A.S.)
| | - Justyna Woś
- Department of Clinical Immunology, Medical University of Lublin, 20-093 Lublin, Poland;
| | - Andrzej Stepulak
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-093 Lublin, Poland; (M.K.); (J.C.); (J.K.); (A.S.)
| | - Adolfo Rivero-Müller
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, 20-093 Lublin, Poland; (M.K.); (J.C.); (J.K.); (A.S.)
- Faculty of Natural Sciences and Technology, Åbo Akademi University, 20500 Turku, Finland
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Kiełbus M, Czapiński J, Odrzywolski A, Stasiak G, Szymańska K, Kałafut J, Kos M, Giannopoulos K, Stepulak A, Rivero-Müller A. Optogenetics in cancer drug discovery. Expert Opin Drug Discov 2018; 13:459-472. [DOI: 10.1080/17460441.2018.1437138] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Michał Kiełbus
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland
| | - Jakub Czapiński
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland
- Postgraduate School of Molecular Medicine, Medical University of Warsaw, Warsaw, Poland
| | - Adrian Odrzywolski
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland
| | - Grażyna Stasiak
- Department of Experimental Haematooncology, Medical University of Lublin, Lublin, Poland
| | - Kamila Szymańska
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland
| | - Joanna Kałafut
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland
| | - Michał Kos
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland
| | - Krzysztof Giannopoulos
- Department of Experimental Haematooncology, Medical University of Lublin, Lublin, Poland
- Department of Hematology, St. John’s Cancer Center, Lublin, Poland
| | - Andrzej Stepulak
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland
| | - Adolfo Rivero-Müller
- Department of Biochemistry and Molecular Biology, Medical University of Lublin, Lublin, Poland
- Cell Biology, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
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8
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Czapiński J, Kiełbus M, Kałafut J, Kos M, Stepulak A, Rivero-Müller A. How to Train a Cell-Cutting-Edge Molecular Tools. Front Chem 2017; 5:12. [PMID: 28344971 PMCID: PMC5344921 DOI: 10.3389/fchem.2017.00012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 02/20/2017] [Indexed: 12/28/2022] Open
Abstract
In biological systems, the formation of molecular complexes is the currency for all cellular processes. Traditionally, functional experimentation was targeted to single molecular players in order to understand its effects in a cell or animal phenotype. In the last few years, we have been experiencing rapid progress in the development of ground-breaking molecular biology tools that affect the metabolic, structural, morphological, and (epi)genetic instructions of cells by chemical, optical (optogenetic) and mechanical inputs. Such precise dissection of cellular processes is not only essential for a better understanding of biological systems, but will also allow us to better diagnose and fix common dysfunctions. Here, we present several of these emerging and innovative techniques by providing the reader with elegant examples on how these tools have been implemented in cells, and, in some cases, organisms, to unravel molecular processes in minute detail. We also discuss their advantages and disadvantages with particular focus on their translation to multicellular organisms for in vivo spatiotemporal regulation. We envision that further developments of these tools will not only help solve the processes of life, but will give rise to novel clinical and industrial applications.
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Affiliation(s)
- Jakub Czapiński
- Department of Biochemistry and Molecular Biology, Medical University of LublinLublin, Poland
- Postgraduate School of Molecular Medicine, Medical University of WarsawWarsaw, Poland
| | - Michał Kiełbus
- Department of Biochemistry and Molecular Biology, Medical University of LublinLublin, Poland
| | - Joanna Kałafut
- Department of Biochemistry and Molecular Biology, Medical University of LublinLublin, Poland
| | - Michał Kos
- Department of Biochemistry and Molecular Biology, Medical University of LublinLublin, Poland
| | - Andrzej Stepulak
- Department of Biochemistry and Molecular Biology, Medical University of LublinLublin, Poland
| | - Adolfo Rivero-Müller
- Department of Biochemistry and Molecular Biology, Medical University of LublinLublin, Poland
- Turku Centre for Biotechnology, University of Turku and Åbo Akademi UniversityTurku, Finland
- Department of Biosciences, Åbo Akademi UniversityTurku, Finland
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Czapiński J. [Functional and radiological assessment of the hip joint after Perthes disease]. Chir Narzadow Ruchu Ortop Pol 2002; 66:597-606. [PMID: 12050874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Basing a group of 33 patients treat conservatively because of Perthes disease some aspects of functional and radiological assessment of the hip joints is presented. Functional assessment was performed according to the authors' own scale. Radiological assessment was performed basing on Heyman-Herndon method, Klisica method and the authors' own head-trochanter factor and head radius assessment. A comparison of the obtained results was performed, and the clinical usefulness of the authors own head-trochanter and head radius was assessed. The head-trochanter factor correlated to the Heyman-Herndon method allowing assessment of the proximal epiphysis and physis of the femur, while the head radius factor correlated to the Klisica method and allows the assessment of head sphericity, head size and the degree of lateral subluxation of the head.
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Affiliation(s)
- J Czapiński
- Klinika Ortopedii i Traumatologii Narzadu Ruchu, Akademia Medyczna we Wrocławiu
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Biliński PJ, Wall A, Morasiewicz L, Orzechowski W, Czapiński J. [Evaluation of knee joint function after fracture of the patella]. Chir Narzadow Ruchu Ortop Pol 1991; 56:40-2. [PMID: 1369881] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/25/2023]
Abstract
Clinical assessment of the function of the knee joint after surgically and conservatively treated fracture of the patella was carried out. On the basis of C. Ranawat criteria it was found that regardless the method of treatment applied restriction of the joint function was expressed mainly by limited range of motion and by weakening of the knee extensors. The results of surgical and conservative management are similar. The best results of treatment for fracture of the patella were achieved in patients operated with the use of wire loop-cerclage.
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11
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Biliński P, Morasiewicz L, Czapiński J, Orzechowski W. [Radiologic analysis of the patello-femoral joint after treatment of patella fracture]. Chir Narzadow Ruchu Ortop Pol 1991; 56:43-6. [PMID: 1369882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/25/2023]
Abstract
Anatomical condition and congruence of the patello-femoral joint after differently treated fracture of the patella was assessed on the basis of roentgenometric analysis of radiographs of 39 patients. The best situation was found in surgically treated cases with the use of the wire loop (cerclage), less favorable in patients managed conservatively and the worst in patients operated after Weber.
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Affiliation(s)
- P Biliński
- Katedry i Kliniki Ortopedii AM we Wrocławiu
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