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Effects of endotoxin on lactate metabolism in humans

Overview of attention for article published in Critical Care, July 2012
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Title
Effects of endotoxin on lactate metabolism in humans
Published in
Critical Care, July 2012
DOI 10.1186/cc11444
Pubmed ID
Authors

Burkhard Michaeli, Alexandre Martinez, Jean-Pierre Revelly, Marie-Christine Cayeux, René L Chioléro, Luc Tappy, Mette M Berger

Abstract

ABSTRACT: INTRODUCTION: Hyperlactatemia represents one prominent component of the metabolic response to sepsis. In critically ill patients, hyperlactatemia is related to the severity of the underlying condition. Both an increased production and a decreased utilization and clearance might be involved in this process, but their relative contribution remains unknown. The present study aimed at assessing systemic and muscle lactate production and systemic lactate clearance in healthy human volunteers, using intravenous endotoxin (LPS) challenge. METHODS: Fourteen healthy male volunteers were enrolled in 2 consecutive studies (n = 6 in trial 1 and n = 8 in trial 2). Each subject took part in one of two investigation days (LPS-day with endotoxin injection and placebo-day with saline injection) separated by one week at least and in a random order. In trial 1, their muscle lactate metabolism was monitored using microdialysis. In trial 2, their systemic lactate metabolism was monitored by means of a constant infusion of exogenous lactate. Energy metabolism was monitored by indirect calorimetry and glucose kinetics was measured with 6,6-H2 glucose. RESULTS: In both trials, LPS increased energy expenditure (p = 0.011), lipid oxidation (p<0.0001), and plasma lactate concentration (p = 0.016). In trial 1, lactate concentration in the muscle microdialysate was higher than in blood, indicating lactate production by muscles. This was, however, similar with and without LPS. In trial 2, calculated systemic lactate production increased after LPS (p = 0.031), while lactate clearance remained unchanged. CONCLUSIONS: LPS administration increases lactatemia by increasing lactate production rather than by decreasing lactate clearance. Muscle is, however, unlikely to be a major contributor to this increase in lactate production. TRIAL REGISTRATION: ClinicalTrials.gov NCT01647997.

Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 87 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Brazil 2 2%
United Kingdom 2 2%
Italy 1 1%
India 1 1%
France 1 1%
Unknown 80 92%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 13 15%
Researcher 13 15%
Student > Postgraduate 9 10%
Student > Doctoral Student 9 10%
Student > Bachelor 9 10%
Other 22 25%
Unknown 12 14%
Readers by discipline Count As %
Medicine and Dentistry 53 61%
Agricultural and Biological Sciences 8 9%
Biochemistry, Genetics and Molecular Biology 5 6%
Pharmacology, Toxicology and Pharmaceutical Science 2 2%
Nursing and Health Professions 2 2%
Other 4 5%
Unknown 13 15%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. 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 03 September 2012.
All research outputs
#17,489,487
of 25,654,806 outputs
Outputs from Critical Care
#5,504
of 6,599 outputs
Outputs of similar age
#118,526
of 179,634 outputs
Outputs of similar age from Critical Care
#77
of 106 outputs
Altmetric has tracked 25,654,806 research outputs across all sources so far. This one is in the 21st percentile – i.e., 21% of other outputs scored the same or lower than it.
So far Altmetric has tracked 6,599 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 20.7. This one is in the 10th percentile – i.e., 10% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 179,634 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 24th percentile – i.e., 24% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 106 others from the same source and published within six weeks on either side of this one. This one is in the 19th percentile – i.e., 19% of its contemporaries scored the same or lower than it.