Assessing the effects of mitofusin 2 deficiency in the adult heart using 3D electron tomography

Siavash Beikoghli Kalkhoran, Andrew R. Hall, Ian J. White, Jackie Cooper, Qiao Fan, Sang Bing Ong, Sauri Hernández-Reséndiz, Hector Cabrera-Fuentes, Kroekkiat Chinda, Bibhas Chakraborty, Gerald W. Dorn, Derek M. Yellon, Derek J. Hausenloy

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The effects of mitofusin 2 (MFN2) deficiency, on mitochondrial morphology and the mitochondria-junctional sarcoplasmic reticulum (jSR) complex in the adult heart, have been previously investigated using 2D electron microscopy, an approach which is unable to provide a 3D spatial assessment of these imaging parameters. Here, we use 3D electron tomography to show that MFN2-deficient mitochondria are larger in volume, more elongated, and less rounded; have fewer mitochondria-jSR contacts, and an increase in the distance between mitochondria and jSR, when compared to WT mitochondria. In comparison to 2D electron microscopy, 3D electron tomography can provide further insights into mitochondrial morphology and the mitochondria- jSR complex in the adult heart.

Original languageEnglish
Article numbere13437
JournalPhysiological Reports
Volume5
Issue number17
DOIs
StatePublished - Sep 12 2017

Keywords

  • 3D electron tomography
  • MFN2 KO
  • Mitochondria-jSR junction

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