Abstract | SCOPE: Given the d-lactate dehydrogenase (D- LDH) deficiency, L- but not d- lactate is assumed to be the physiological isomer in mammals. Paradoxically, many fermented foods (e.g., yogurt, sauerkraut, cheeses) often contain substantial amounts of d- lactate. In the present study, dietary d- lactate may be a previously unrecognized nutrient aiding in inflammatory resolution is hypothesized. METHODS AND RESULTS: The anti-inflammatory properties of d- lactate are evaluated in experimental colitis and endotoxemia. Oral administration of d- lactate favorably affects acute inflammation in two different mouse models. Analysis of lactate-the lactate receptor (the hydroxycarboxylic acid receptor 1 HCA1, formerly GPR81) signal axis in inflammation is performed in primary peritoneal macrophages and wild-type (WT) or GPR81 knockout (KO) mice. GPR81 KO mice are susceptible to endotoxic shock than WT mice, while d- lactate exerts its anti-inflammatory activities in a GPR81-dependent manner. Mechanistically, the activation of lactate-GPR81 axis may suppress LPS-TLR4 signaling to modulate M1 macrophage polarization. Although D- LDH deficiency in mammals impairs d- lactate clearance, it might prolong its plasma terminal half-life, and thus provide a pharmacokinetic advantage of d- lactate over l- lactate. CONCLUSION: This study highlights housekeeping function of the lactate-GPR81 axis in inflammation control, and suggests that dietary intake of d- lactate may underlie Metchnikoff's probiotic yogurt theory of life prolongation.
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Authors | Yongheng Yan, Xiu Li, Qin Yang, Hao Zhang, Kasper Hettinga, Haitao Li, Wei Chen |
Journal | Molecular nutrition & food research
(Mol Nutr Food Res)
Vol. 66
Issue 24
Pg. e2200196
(12 2022)
ISSN: 1613-4133 [Electronic] Germany |
PMID | 36239154
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | © 2022 Wiley-VCH GmbH. |
Chemical References |
- Anti-Inflammatory Agents
- Lactic Acid
- Receptors, G-Protein-Coupled
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Topics |
- Animals
- Mice
- Anti-Inflammatory Agents
(pharmacology)
- Inflammation
- Lactic Acid
- Macrophages
- Mice, Knockout
- Receptors, G-Protein-Coupled
(genetics)
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