Advancing the Art of Mitochondrial Diagnostics and Therapeutics

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atmire.migration.oldid5715
dc.contributor.advisorKhan, Aneal
dc.contributor.advisorShearer, Jane
dc.contributor.authorNewell, Christopher
dc.contributor.committeememberRho, Jong
dc.contributor.committeememberChilds, Sarah
dc.contributor.committeememberShutt, Timothy
dc.contributor.committeememberHaqq, Andrea
dc.date.accessioned2017-07-04T21:48:06Z
dc.date.available2017-07-04T21:48:06Z
dc.date.issued2017
dc.date.submitted2017en
dc.description.abstractObjective: Mitochondrial diseases are panethnic genetic disorders, affecting 1:5000 individuals. Currently with no cure, challenges exist in patient diagnosis, measurement of mitochondrial function, and effective therapies. The primary emphasis of this dissertation was to explore diagnostic and therapeutic targets for mitochondrial disease. Investigated therapies included; mesenchymal stem cell (MSC) therapy, dietary interventions, and side alternating vibration training (SAVT). Novel diagnostic approaches employed were; the hybrid blue-clear native polyacrylamide gel electrophoresis (BCN-PAGE), and circulating cell-free mitochondrial DNA (cf-mtDNA) techniques. Methods: C57BL/6 mice were intravenously treated with MSCs following the induction of metabolic inflammation through prolonged high-fat (HF) feeding. A separate cohort of BTBR, autism-phenotype, mice were treated with a ketogenic diet (KD) to examine the impact on mitochondrial dynamics in a disease commonly experiencing mitochondrial dysfunction. These projects involved a combination of mitochondrial bioenergetics (high resolution respirometry), gut microbiome (fecal and cecal), gene expression (qRT-PCR, gene microarray), and mitochondrial morphology (confocal microscopy) experimentation to evaluate the mitochondrial-specific response to each therapy. Thirdly, clinical assessment of SAVT as a therapeutic in mitochondrial disease patients was performed using a 12-week cross-over study design using peak jumping power (PJP) as a primary functional measurement of mitochondrial function. Diagnostically, mitochondria were isolated from control and mitochondrial disease patient skin fibroblasts to compare our BCN-PAGE technique to existing diagnoses. Secondly, blood was drawn from both control and mitochondrial disease patients for clinical comparisons of mtDNA hapolotyping using our cf-mtDNA technique. Results: Therapeutic studies indicate that MSCs improve metabolic capacity, induce widespread gene shifting, and promote healthy mitochondrial morphology in a model of metabolic inflammation. Moreover, KD administration exerts tissue-specific effects including increased mitochondrial turnover in liver, while the brain remained tightly regulated. Clinically, SAVT was well tolerated in mitochondrial disease patients, with improvements in PJP being measured following therapy. Diagnostically, both BCN-PAGE and cf-mtDNA techniques were successfully able to corroborate clinical diagnostic findings. Conclusions: Experiments completed in this dissertation provide insight into various therapeutic opportunities for both mitochondrial disease and diseases involving mitochondrial dysfunction. Furthermore, our less-invasive diagnostic techniques may be useful to monitor the response to future therapies for mitochondrial disease.en_US
dc.identifier.citationNewell, C. (2017). Advancing the Art of Mitochondrial Diagnostics and Therapeutics (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/24728en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/24728
dc.identifier.urihttp://hdl.handle.net/11023/3920
dc.language.isoeng
dc.publisher.facultyGraduate Studies
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subjectGenetics
dc.subjectBiology--Molecular
dc.subject.othermitochondria
dc.subject.othermitochondrial disease
dc.subject.othermetabolism
dc.subject.otherGenetics
dc.titleAdvancing the Art of Mitochondrial Diagnostics and Therapeutics
dc.typedoctoral thesis
thesis.degree.disciplineMedical Science
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameDoctor of Philosophy (PhD)
ucalgary.item.requestcopytrue
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