Rausser 2021 Elife

Rausser S, Trumpff C, McGill MA, Junker A, Wang W, Ho SH, Mitchell A, Karan KR, Monk C, Segerstrom SC, Reed RG, Picard M (2021) Mitochondrial phenotypes in purified human immune cell subtypes and cell mixtures. Elife 10:e70899. https://doi.org/10.7554/eLife.70899

» PMID: 34698636 Open Access

Rausser S, Trumpff C, McGill MA, Junker A, Wang W, Ho SH, Mitchell A, Karan KR, Monk C, Segerstrom SC, Reed RG, Picard M (2021) Elife

Abstract: Using a high-throughput mitochondrial phenotyping platform to quantify multiple mitochondrial features among molecularly defined immune cell subtypes, we quantify the natural variation in mitochondrial DNA copy number (mtDNAcn), citrate synthase, and respiratory chain enzymatic activities in human neutrophils, monocytes, B cells, and naïve and memory T lymphocyte subtypes. In mixed peripheral blood mononuclear cells (PBMCs) from the same individuals, we show to what extent mitochondrial measures are confounded by both cell type distributions and contaminating platelets. Cell subtype-specific measures among women and men spanning four decades of life indicate potential age- and sex-related differences, including an age-related elevation in mtDNAcn, which are masked or blunted in mixed PBMCs. Finally, a proof-of-concept, repeated-measures study in a single individual validates cell type differences and also reveals week-to-week changes in mitochondrial activities. Larger studies are required to validate and mechanistically extend these findings. These mitochondrial phenotyping data build upon established immunometabolic differences among leukocyte subpopulations, and provide foundational quantitative knowledge to develop interpretable blood-based assays of mitochondrial health.

• Bioblast editor: Gnaiger E

Correction: beta-Oxidation and CII ambiguity

beta-Oxidation is shown to be linked to CI (correct) and CII (wrong) in a Figure published in refs. [1,2,3,4,5]. For clarification, see ref. [6].

1. Picard M, McEwen BS (2018) Psychological stress and mitochondria: a systematic review. Psychosom Med 80:141-53. - »Bioblast link«
2. Picard M, Prather AA, Puterman E, Cuillerier A, Coccia M, Aschbacher K, Burelle Y, Epel ES (2018) A mitochondrial health index sensitive to mood and caregiving stress. Biol Psychiatry 84:9-17. - »Bioblast link«
3. Karan KR, Trumpff C, McGill MA, Thomas JE, Sturm G, Lauriola V, Sloan RP, Rohleder N, Kaufman BA, Marsland AL, Picard M (2020) Mitochondrial respiratory capacity modulates LPS-induced inflammatory signatures in human blood. Brain Behav Immun Health 5:100080. - »Bioblast link«
4. Bindra S, McGill MA, Triplett MK, Tyagi A, Thaker PH, Dahmoush L, Goodheart MJ, Ogden RT, Owusu-Ansah E, R Karan K, Cole S, Sood AK, Lutgendorf SK, Picard M (2021) Mitochondria in epithelial ovarian carcinoma exhibit abnormal phenotypes and blunted associations with biobehavioral factors. Sci Rep 11:11595. - »Bioblast link«
5. Rausser S, Trumpff C, McGill MA, Junker A, Wang W, Ho SH, Mitchell A, Karan KR, Monk C, Segerstrom SC, Reed RG, Picard M (2021) Mitochondrial phenotypes in purified human immune cell subtypes and cell mixtures. Elife 10:e70899. - »Bioblast link«
6. Gnaiger E (2023) Complex II ambiguities ― FADH₂ in the electron transfer system. MitoFit Preprints 2023.3.v6. https://doi.org/10.26124/mitofit:2023-0003.v6

Correction: FADH₂ and Complex II

FADH₂ is shown as the substrate feeding electrons into Complex II (CII). This is wrong and requires correction - for details see Gnaiger (2024).

Gnaiger E (2024) Complex II ambiguities ― FADH₂ in the electron transfer system. J Biol Chem 300:105470. https://doi.org/10.1016/j.jbc.2023.105470 - »Bioblast link«

Labels: MiParea: mtDNA;mt-genetics 

Organism: Human  Tissue;cell: Blood cells, Platelet 

Enzyme: Complex II;succinate dehydrogenase, Marker enzyme 

Pathway: F 

PBMCs