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| Title | Cryogenic electron tomography and elemental analysis of mitochondrial granules in human retinal ganglion cells. |
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| Journal, issue, pages | Structure, Vol. 33, Issue 10, Page 1771-11780.e3, Year 2025 |
| Publish date | Oct 2, 2025 |
Authors | Gong-Her Wu / Cathy Hou / Andrew Thron / Hirenkumar Rajendra Patel / Liam Spillane / Sanket Rajan Gupte / Serena Yeung-Levy / Sahil Gulati / Christopher Booth / Yaping Joyce Liao / Wah Chiu / ![]() |
| PubMed Abstract | Combining three-dimensional (3D) visualization with elemental analysis of vitrified cells can provide crucial insights into subcellular structures and elemental compositions in their native ...Combining three-dimensional (3D) visualization with elemental analysis of vitrified cells can provide crucial insights into subcellular structures and elemental compositions in their native environments. We present a coordinated approach using cryogenic electron energy loss spectroscopy (cryoEELS) and cryogenic electron tomography (cryoET) to characterize the elemental distribution and ultrastructure of vitrified cells. We applied this method to examine calcium disposition in the mitochondria of cultured human retinal ganglion cells (RGCs) exposed to pro-calcifying conditions relevant to optic disc drusen pathology. Our cryoEELS analysis revealed mitochondrial granules with elevated calcium signals, offering direct evidence of mitochondrial calcification. Additionally, cryoET coupled with artificial intelligence-based analysis enabled quantification of the volume and spatial distribution of these calcium granules. This integrated workflow can be broadly applied to various cell types, facilitating the study of ultrastructure and elemental distribution in subcellular structures under diverse physiological and pathological conditions, as well as in response to therapeutic interventions. |
External links | Structure / PubMed:40763734 |
| Methods | EM (tomography) |
| Structure data | ![]() EMDB-49874: CryoET tomogram of hESC-derived retinal ganglion cell treated with calcification media ![]() EMDB-49875: CryoET tomogram of hESC-derived retinal ganglion cell treated with potassium phosphate |
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Homo sapiens (human)