| Title |
Heat acclimation increases mitochondrial respiration capacity of C2C12 myotubes and protects against LPS-mediated energy deficit
|
|---|---|
| Published in |
Cell Stress and Chaperones, April 2018
|
| DOI | 10.1007/s12192-018-0894-1 |
| Pubmed ID | |
| Authors |
Meghan G Patton, Trevor L Gillum, Mandy C Szymanski, Lacey M Gould, Claire J Lauterbach, Roger A Vaughan, Matthew R Kuennen |
| Abstract |
This work investigated the effect of a 6-day heat acclimation (HA) protocol on myotube metabolic responses at baseline and in response to a subsequent lipopolysaccharide (LPS) challenge. C2C12 myotubes were incubated for 2 h/day at 40 °C for 6 days (HA) or maintained at 37 °C (C). Following 24-h recovery, myotubes were challenged with 500 ng/ml LPS for 2 h, then collected for analysis of protein markers of mitochondrial biogenesis and macronutrient storage. Functional significance of these changes was confirmed with mitochondrial respiration and glycolytic measurements on a Seahorse XF-96 analyzer. HA stimulated mitochondrial biogenesis and increased indicators of mitochondrial content [SIRT1 (+ 62%); PGC-1α (+ 57%); NRF-1 (+ 40%); TFAM (+ 141%); CS (+ 25%); CytC (+ 38%); all p < 0.05]. Altered lipid biosynthesis enzymes [p-ACCa:ACC (+ 59%; p = 0.04) and FAS (- 86%; p < 0.01)] suggest fatty acid generation may have been downregulated, whereas increased GLUT4 (+ 69%; p < 0.01) and LDH-B (+ 366%; p < 0.01) suggest aerobic glycolytic capacity may have been improved. Mitochondrial biogenesis signaling in HA myotubes was suppressed by 500 ng/ml LPS (PGC-1α, NRF-1, TFAM; all p > 0.05) but increased LDH-B (+ 30%; p = 0.02) and CPT-1 (+ 55%; p < 0.01) suggesting improved catabolic function. Basal respiration was increased in HA myotubes (+ 8%; p < 0.01) and HA myotubes maintained elevated basal respiration during LPS challenge (+ 8%; p < 0.01). LPS reduced peak respiration in C myotubes (- 6%; p < 0.01) but did not impair peak respiration in HA myotubes (p > 0.05). Oxidative reliance was elevated in HA over that in control (+ 25%; p < 0.01) and in HA + LPS over C + LPS (+ 30%; p < 0.01). In summary, HA stimulated mitochondrial biogenesis in C2C12 myotubes. HA myotubes exhibited (1) elevated basal/peak mitochondrial respiration capacities; (2) greater oxidative reliance; and (3) protection against LPS-mediated respiration impairment. Collectively, these data suggest HA may improve aerobic metabolism in skeletal muscle and protect against LPS-mediated energy deficit. |
X Demographics
The data shown below were collected from the profiles of 15 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United Kingdom | 6 | 40% |
| United States | 3 | 20% |
| France | 2 | 13% |
| Unknown | 4 | 27% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 12 | 80% |
| Scientists | 3 | 20% |
Mendeley readers
The data shown below were compiled from readership statistics for 37 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 37 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 9 | 24% |
| Student > Master | 6 | 16% |
| Student > Bachelor | 4 | 11% |
| Researcher | 3 | 8% |
| Lecturer | 1 | 3% |
| Other | 2 | 5% |
| Unknown | 12 | 32% |
| Readers by discipline | Count | As % |
|---|---|---|
| Sports and Recreations | 8 | 22% |
| Biochemistry, Genetics and Molecular Biology | 6 | 16% |
| Agricultural and Biological Sciences | 3 | 8% |
| Medicine and Dentistry | 2 | 5% |
| Social Sciences | 1 | 3% |
| Other | 1 | 3% |
| Unknown | 16 | 43% |
Attention Score in Context
This research output has an Altmetric Attention Score of 9. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 05 January 2019.
All research outputs
#4,099,701
of 25,394,764 outputs
Outputs from Cell Stress and Chaperones
#74
of 699 outputs
Outputs of similar age
#75,299
of 343,348 outputs
Outputs of similar age from Cell Stress and Chaperones
#5
of 14 outputs
Altmetric has tracked 25,394,764 research outputs across all sources so far. Compared to these this one has done well and is in the 83rd percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 699 research outputs from this source. They receive a mean Attention Score of 3.7. This one has done well, scoring higher than 89% of its peers.
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We're also able to compare this research output to 14 others from the same source and published within six weeks on either side of this one. This one has gotten more attention than average, scoring higher than 64% of its contemporaries.