Assessing the effects of mitofusin 2 deficiency in the adult heart using 3D electron tomography. Issue 17 (14th September 2017)

• Record Type: Journal Article
• Authors: Beikoghli Kalkhoran, Siavash; Hall, Andrew R.; White, Ian J.; Cooper, Jackie; Fan, Qiao; Ong, Sang‐Bing; Hernández‐Reséndiz, Sauri; Cabrera‐Fuentes, Hector; Chinda, Kroekkiat; Chakraborty, Bibhas; Dorn, Gerald W.; Yellon, Derek M.; Hausenloy, Derek J.
• Is Part Of: Physiological reports. Volume 5:Issue 17(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-09-14
• Subjects: 3D electron tomography -- MFN2 KO -- mitochondria–jSR junction; Physiology -- Periodicals; 571
• DOI: 10.14814/phy2.13437
• Languages: English
• ISSNs: 2051-817X

Abstract

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. 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.