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Andjelković A, Mordas A, Bruinsma L, Ketola A, Cannino G, Giordano L, Dhandapani PK, Szibor M, Dufour E, Jacobs HT. Expression of the Alternative Oxidase Influences Jun N-Terminal Kinase Signaling and Cell Migration. Mol Cell Biol 2018; 38:e00110-18. [PMID: 30224521 PMCID: PMC6275184 DOI: 10.1128/mcb.00110-18] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 04/11/2018] [Accepted: 09/11/2018] [Indexed: 12/25/2022] Open
Abstract
Downregulation of Jun N-terminal kinase (JNK) signaling inhibits cell migration in diverse model systems. In Drosophila pupal development, attenuated JNK signaling in the thoracic dorsal epithelium leads to defective midline closure, resulting in cleft thorax. Here we report that concomitant expression of the Ciona intestinalis alternative oxidase (AOX) was able to compensate for JNK pathway downregulation, substantially correcting the cleft thorax phenotype. AOX expression also promoted wound-healing behavior and single-cell migration in immortalized mouse embryonic fibroblasts (iMEFs), counteracting the effect of JNK pathway inhibition. However, AOX was not able to rescue developmental phenotypes resulting from knockdown of the AP-1 transcription factor, the canonical target of JNK, nor its targets and had no effect on AP-1-dependent transcription. The migration of AOX-expressing iMEFs in the wound-healing assay was differentially stimulated by antimycin A, which redirects respiratory electron flow through AOX, altering the balance between mitochondrial ATP and heat production. Since other treatments affecting mitochondrial ATP did not stimulate wound healing, we propose increased mitochondrial heat production as the most likely primary mechanism of action of AOX in promoting cell migration in these various contexts.
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Affiliation(s)
- Ana Andjelković
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
- BioMediTech Institute, University of Tampere, Tampere, Finland
| | - Amelia Mordas
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
- BioMediTech Institute, University of Tampere, Tampere, Finland
| | - Lyon Bruinsma
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
- BioMediTech Institute, University of Tampere, Tampere, Finland
| | - Annika Ketola
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
- BioMediTech Institute, University of Tampere, Tampere, Finland
| | - Giuseppe Cannino
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
- BioMediTech Institute, University of Tampere, Tampere, Finland
| | - Luca Giordano
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
- BioMediTech Institute, University of Tampere, Tampere, Finland
| | - Praveen K Dhandapani
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
- BioMediTech Institute, University of Tampere, Tampere, Finland
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Marten Szibor
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
- BioMediTech Institute, University of Tampere, Tampere, Finland
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
| | - Eric Dufour
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
- BioMediTech Institute, University of Tampere, Tampere, Finland
| | - Howard T Jacobs
- Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
- BioMediTech Institute, University of Tampere, Tampere, Finland
- Institute of Biotechnology, University of Helsinki, Helsinki, Finland
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Gordon SR. Cell Migration along the Basement Membrane during Wound Repair. The Corneal Endothelium as a Model System. BIOENGINEERING RESEARCH OF CHRONIC WOUNDS 2009. [DOI: 10.1007/978-3-642-00534-3_3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Hartmann-Petersen R, Walmod PS, Berezin A, Berezin V, Bock E. Individual cell motility studied by time-lapse video recording: influence of experimental conditions. CYTOMETRY 2000; 40:260-70. [PMID: 10918277 DOI: 10.1002/1097-0320(20000801)40:4<260::aid-cyto2>3.0.co;2-j] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND Eukaryotic cell motility plays a key role during development, wound healing, and tumour invasion. Computer-assisted image analysis now makes it a realistic task to quantify individual cell motility of a large number of cells. However, the influence of culture conditions before and during measurements has not been investigated systematically. METHODS We have evaluated intraassay and interassay variations in determinations of cellular speed of fibroblastoid L929 cells and investigated the effects of a series of physical and biological parameters on the motile behavior of this cell line. Cellular morphology and organization of filamentous actin were assessed by means of phase-contrast and confocal laser scanning microscopy and compared to the corresponding motility data. RESULTS Cell dissociation procedure, seeding density, time of cultivation, and substrate concentration were shown to affect cellular speed significantly. pH and temperature of the medium most profoundly influenced cell motility and morphology. Thus, the mean cell speed was 40% lower at pH 7.25 than at pH 7.6; at 29 degrees C, it was approximately four times lower than at 39 degrees C. CONCLUSION Of the parameters evaluated, cell motility was most strongly affected by changes in pH and temperature. In general, changes in cell speed were accompanied by alterations in cell morphology and organization of filamentous actin, although no consistent phenotypic characteristics could be demonstrated for cells exhibiting high cell speed.
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Affiliation(s)
- R Hartmann-Petersen
- Protein Laboratory, Institute of Molecular Pathology, University of Copenhagen, Panum Institute, Denmark
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