1
|
Tassinari ID, Rodrigues FDS, Bertram C, Mendes-da-Cruz DA, Guedes RP, Paz AH, Bambini-Junior V, de Fraga LS. Lactate Protects Microglia and Neurons from Oxygen-Glucose Deprivation/Reoxygenation. Neurochem Res 2024; 49:1762-1781. [PMID: 38551797 DOI: 10.1007/s11064-024-04135-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 02/06/2024] [Accepted: 02/20/2024] [Indexed: 06/02/2024]
Abstract
Lactate has received attention as a potential therapeutic intervention for brain diseases, particularly those including energy deficit, exacerbated inflammation, and disrupted redox status, such as cerebral ischemia. However, lactate roles in metabolic or signaling pathways in neural cells remain elusive in the hypoxic and ischemic contexts. Here, we tested the effects of lactate on the survival of a microglial (BV-2) and a neuronal (SH-SY5Y) cell lines during oxygen and glucose deprivation (OGD) or OGD followed by reoxygenation (OGD/R). Lactate signaling was studied by using 3,5-DHBA, an exogenous agonist of lactate receptor GPR81. Inhibition of lactate dehydrogenase (LDH) or monocarboxylate transporters (MCT), using oxamate or 4-CIN, respectively, was performed to evaluate the impact of lactate metabolization and transport on cell viability. The OGD lasted 6 h and the reoxygenation lasted 24 h following OGD (OGD/R). Cell viability, extracellular lactate concentrations, microglial intracellular pH and TNF-ɑ release, and neurite elongation were evaluated. Lactate or 3,5-DHBA treatment during OGD increased microglial survival during reoxygenation. Inhibition of lactate metabolism and transport impaired microglial and neuronal viability. OGD led to intracellular acidification in BV-2 cells, and reoxygenation increased the release of TNF-ɑ, which was reverted by lactate and 3,5-DHBA treatment. Our results suggest that lactate plays a dual role in OGD, acting as a metabolic and a signaling molecule in BV-2 and SH-SY5Y cells. Lactate metabolism and transport are vital for cell survival during OGD. Moreover, lactate treatment and GPR81 activation during OGD promote long-term adaptations that potentially protect cells against secondary cell death during reoxygenation.
Collapse
Affiliation(s)
- Isadora D'Ávila Tassinari
- Graduate Program in Physiology, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, 90050-003, Brazil
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine, Lancaster University, Lancaster, LA1 4YW, UK
| | - Fernanda da Silva Rodrigues
- Graduate Program in Biosciences, Federal University of Health Sciences of Porto Alegre (UFCSPA), Porto Alegre, 90050-170, Brazil
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine, Lancaster University, Lancaster, LA1 4YW, UK
| | - Craig Bertram
- School of Pharmacy and Biomedical Sciences, University of Central Lancashire, Preston, PR1 2HE, UK
| | - Daniella Arêas Mendes-da-Cruz
- Laboratory on Thymus Research, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro, 21040-360, Brazil
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine, Lancaster University, Lancaster, LA1 4YW, UK
| | - Renata Padilha Guedes
- Graduate Program in Biosciences, Federal University of Health Sciences of Porto Alegre (UFCSPA), Porto Alegre, 90050-170, Brazil
| | - Ana Helena Paz
- Graduate Program in Physiology, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, 90050-003, Brazil
| | - Victorio Bambini-Junior
- Division of Biomedical and Life Sciences, Faculty of Health and Medicine, Lancaster University, Lancaster, LA1 4YW, UK
| | - Luciano Stürmer de Fraga
- Graduate Program in Physiology, Institute of Basic Health Sciences (ICBS), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, 90050-003, Brazil.
| |
Collapse
|
2
|
Hladky SB, Barrand MA. Alterations in brain fluid physiology during the early stages of development of ischaemic oedema. Fluids Barriers CNS 2024; 21:51. [PMID: 38858667 PMCID: PMC11163777 DOI: 10.1186/s12987-024-00534-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Accepted: 03/22/2024] [Indexed: 06/12/2024] Open
Abstract
Oedema occurs when higher than normal amounts of solutes and water accumulate in tissues. In brain parenchymal tissue, vasogenic oedema arises from changes in blood-brain barrier permeability, e.g. in peritumoral oedema. Cytotoxic oedema arises from excess accumulation of solutes within cells, e.g. ischaemic oedema following stroke. This type of oedema is initiated when blood flow in the affected core region falls sufficiently to deprive brain cells of the ATP needed to maintain ion gradients. As a consequence, there is: depolarization of neurons; neural uptake of Na+ and Cl- and loss of K+; neuronal swelling; astrocytic uptake of Na+, K+ and anions; swelling of astrocytes; and reduction in ISF volume by fluid uptake into neurons and astrocytes. There is increased parenchymal solute content due to metabolic osmolyte production and solute influx from CSF and blood. The greatly increased [K+]isf triggers spreading depolarizations into the surrounding penumbra increasing metabolic load leading to increased size of the ischaemic core. Water enters the parenchyma primarily from blood, some passing into astrocyte endfeet via AQP4. In the medium term, e.g. after three hours, NaCl permeability and swelling rate increase with partial opening of tight junctions between blood-brain barrier endothelial cells and opening of SUR1-TPRM4 channels. Swelling is then driven by a Donnan-like effect. Longer term, there is gross failure of the blood-brain barrier. Oedema resolution is slower than its formation. Fluids without colloid, e.g. infused mock CSF, can be reabsorbed across the blood-brain barrier by a Starling-like mechanism whereas infused serum with its colloids must be removed by even slower extravascular means. Large scale oedema can increase intracranial pressure (ICP) sufficiently to cause fatal brain herniation. The potentially lethal increase in ICP can be avoided by craniectomy or by aspiration of the osmotically active infarcted region. However, the only satisfactory treatment resulting in retention of function is restoration of blood flow, providing this can be achieved relatively quickly. One important objective of current research is to find treatments that increase the time during which reperfusion is successful. Questions still to be resolved are discussed.
Collapse
Affiliation(s)
- Stephen B Hladky
- Department of Pharmacology, Tennis Court Rd., Cambridge, CB2 1PD, UK.
| | - Margery A Barrand
- Department of Pharmacology, Tennis Court Rd., Cambridge, CB2 1PD, UK
| |
Collapse
|
3
|
Tabata Fukushima C, Dancil IS, Clary H, Shah N, Nadtochiy SM, Brookes PS. Reactive oxygen species generation by reverse electron transfer at mitochondrial complex I under simulated early reperfusion conditions. Redox Biol 2024; 70:103047. [PMID: 38295577 PMCID: PMC10844975 DOI: 10.1016/j.redox.2024.103047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 01/09/2024] [Accepted: 01/15/2024] [Indexed: 02/02/2024] Open
Abstract
Ischemic tissues accumulate succinate, which is rapidly oxidized upon reperfusion, driving a burst of mitochondrial reactive oxygen species (ROS) generation that triggers cell death. In isolated mitochondria with succinate as the sole metabolic substrate under non-phosphorylating conditions, 90 % of ROS generation is from reverse electron transfer (RET) at the Q site of respiratory complex I (Cx-I). Together, these observations suggest Cx-I RET is the source of pathologic ROS in reperfusion injury. However, numerous factors present in early reperfusion may impact Cx-I RET, including: (i) High [NADH]; (ii) High [lactate]; (iii) Mildly acidic pH; (iv) Defined ATP/ADP ratios; (v) Presence of the nucleosides adenosine and inosine; and (vi) Defined free [Ca2+]. Herein, experiments with mouse cardiac mitochondria revealed that under simulated early reperfusion conditions including these factors, total mitochondrial ROS generation was only 56 ± 17 % of that seen with succinate alone (mean ± 95 % confidence intervals). Of this ROS, only 52 ± 20 % was assignable to Cx-I RET. A further 14 ± 7 % could be assigned to complex III, with the remainder (34 ± 11 %) likely originating from other ROS sources upstream of the Cx-I Q site. Together, these data suggest the relative contribution of Cx-I RET ROS to reperfusion injury may be overestimated, and other ROS sources may contribute a significant fraction of ROS in early reperfusion.
Collapse
Affiliation(s)
- Caio Tabata Fukushima
- Departments of Anesthesiology, University of Rochester Medical Center, USA; Departments of Biochemistry, University of Rochester Medical Center, USA; Pharmacology and Physiology, University of Rochester Medical Center, USA
| | - Ian-Shika Dancil
- Departments of Anesthesiology, University of Rochester Medical Center, USA
| | - Hannah Clary
- Departments of Biochemistry, University of Rochester Medical Center, USA
| | - Nidhi Shah
- Pharmacology and Physiology, University of Rochester Medical Center, USA
| | - Sergiy M Nadtochiy
- Departments of Anesthesiology, University of Rochester Medical Center, USA
| | - Paul S Brookes
- Departments of Anesthesiology, University of Rochester Medical Center, USA; Pharmacology and Physiology, University of Rochester Medical Center, USA.
| |
Collapse
|
4
|
Fukushima CT, Dancil IS, Clary H, Shah N, Nadtochiy SM, Brookes PS. Reactive Oxygen Species Generation by Reverse Electron Transfer at Mitochondrial Complex I Under Simulated Early Reperfusion Conditions. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.21.568136. [PMID: 38045326 PMCID: PMC10690194 DOI: 10.1101/2023.11.21.568136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
Ischemic tissues accumulate succinate, which is rapidly oxidized upon reperfusion, driving a burst of mitochondrial reactive oxygen species (ROS) generation that triggers cell death. In isolated mitochondria with succinate as the sole metabolic substrate under non-phosphorylating conditions, 90% of ROS generation is from reverse electron transfer (RET) at the Q site of respiratory complex I (Cx-I). Together, these observations suggest Cx-I RET is the source of pathologic ROS in reperfusion injury. However, numerous factors present in early reperfusion may impact Cx-I RET, including: (i) High [NADH]; (ii) High [lactate]; (iii) Mildly acidic pH; (iv) Defined ATP/ADP ratios; (v) Presence of the nucleosides adenosine and inosine; and (vi) Defined free [Ca2+]. Herein, experiments with mouse cardiac mitochondria revealed that under simulated early reperfusion conditions including these factors, overall mitochondrial ROS generation was only 56% of that seen with succinate alone, and only 52% of this ROS was assignable to Cx-I RET. The residual non-RET ROS could be partially assigned to complex III (Cx-III) with the remainder likely originating from other ROS sources upstream of the Cx-I Q site. Together, these data suggest the relative contribution of Cx-I RET ROS to reperfusion injury may be overestimated, and other ROS sources may contribute a significant fraction of ROS in early reperfusion.
Collapse
Affiliation(s)
- Caio Tabata Fukushima
- Department of Anesthesiology, University of Rochester Medical Center
- Department of Biochemistry, University of Rochester Medical Center
- Department of Pharmacology and Physiology, University of Rochester Medical Center
| | - Ian-Shika Dancil
- Department of Anesthesiology, University of Rochester Medical Center
| | - Hannah Clary
- Department of Biochemistry, University of Rochester Medical Center
| | - Nidhi Shah
- Department of Pharmacology and Physiology, University of Rochester Medical Center
| | | | - Paul S. Brookes
- Department of Anesthesiology, University of Rochester Medical Center
- Department of Pharmacology and Physiology, University of Rochester Medical Center
| |
Collapse
|
5
|
Kaiphanliam KM, Fraser-Hevlin B, Barrow ES, Davis WC, Van Wie BJ. Development of a centrifugal bioreactor for rapid expansion of CD8 cytotoxic T cells for use in cancer immunotherapy. Biotechnol Prog 2023; 39:e3388. [PMID: 37694563 DOI: 10.1002/btpr.3388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 07/27/2023] [Accepted: 08/22/2023] [Indexed: 09/12/2023]
Abstract
One of the current difficulties limiting the use of adoptive cell therapy (ACT) for cancer treatment is the lack of methods for rapidly expanding T cells. As described in the present report, we developed a centrifugal bioreactor (CBR) that may resolve this manufacturing bottleneck. The CBR operates in perfusion by balancing centrifugal forces with a continuous feed of fresh medium, preventing cells from leaving the expansion culture chamber while maintaining nutrients for growth. A bovine CD8 cytotoxic T lymphocyte (CTL) cell line specific for an autologous target cell infected with a protozoan parasite, Theileria parva, was used to determine the efficacy of the CBR for ACT purposes. Batch culture experiments were conducted to predict how CTLs respond to environmental changes associated with consumption of nutrients and production of toxic metabolites, such as ammonium and lactate. Data from these studies were used to develop a kinetic growth model, allowing us to predict CTL growth in the CBR and determine the optimal operating parameters. The model predicts the maximum cell density the CBR can sustain is 5.5 × 107 cells/mL in a single 11-mL conical chamber with oxygen being the limiting factor. Experimental results expanding CTLs in the CBR are in 95% agreement with the kinetic model. The prototype CBR described in this report can be used to develop a CBR for use in cancer immunotherapy.
Collapse
Affiliation(s)
- Kitana M Kaiphanliam
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington, USA
| | - Brenden Fraser-Hevlin
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington, USA
| | - Eric S Barrow
- Voiland College of Engineering and Architecture Professional Shops, Washington State University, Pullman, Washington, USA
| | - William C Davis
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington, USA
| | - Bernard J Van Wie
- Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington, USA
| |
Collapse
|
6
|
Wang 王宇扬 Y, Little AG, Aristizabal MJ, Robertson RM. Low Glycolysis Is Neuroprotective during Anoxic Spreading Depolarization (SD) and Reoxygenation in Locusts. eNeuro 2023; 10:ENEURO.0325-23.2023. [PMID: 37932046 PMCID: PMC10683553 DOI: 10.1523/eneuro.0325-23.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 10/24/2023] [Accepted: 10/31/2023] [Indexed: 11/08/2023] Open
Abstract
Migratory locusts enter a reversible hypometabolic coma to survive environmental anoxia, wherein the cessation of CNS activity is driven by spreading depolarization (SD). While glycolysis is recognized as a crucial anaerobic energy source contributing to animal anoxia tolerance, its influence on the anoxic SD trajectory and recovery outcomes remains poorly understood. We investigated the effects of varying glycolytic capacity on adult female locust anoxic SD parameters, using glucose or the glycolytic inhibitors 2-deoxy-d-glucose (2DG) or monosodium iodoacetate (MIA). Surprisingly, 2DG treatment shared similarities with glucose yet had opposite effects compared with MIA. Specifically, although SD onset was not affected, both glucose and 2DG expedited the recovery of CNS electrical activity during reoxygenation, whereas MIA delayed it. Additionally, glucose and MIA, but not 2DG, increased tissue damage and neural cell death following anoxia-reoxygenation. Notably, glucose-induced injuries were associated with heightened CO2 output during the early phase of reoxygenation. Conversely, 2DG resulted in a bimodal response, initially dampening CO2 output and gradually increasing it throughout the recovery period. Given the discrepancies between effects of 2DG and MIA, the current results require cautious interpretations. Nonetheless, our findings present evidence that glycolysis is not a critical metabolic component in either anoxic SD onset or recovery and that heightened glycolysis during reoxygenation may exacerbate CNS injuries. Furthermore, we suggest that locust anoxic recovery is not solely dependent on energy availability, and the regulation of metabolic flux during early reoxygenation may constitute a strategy to mitigate damage.
Collapse
Affiliation(s)
- Yuyang Wang 王宇扬
- Department of Biology, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | | | - Maria J Aristizabal
- Department of Biology, Queen's University, Kingston, Ontario K7L 3N6, Canada
| | - R Meldrum Robertson
- Department of Biology, Queen's University, Kingston, Ontario K7L 3N6, Canada
| |
Collapse
|
7
|
Rosendo Machado S, Qu J, Koopman WJH, Miesen P. The DEAD-box RNA helicase Dhx15 controls glycolysis and arbovirus replication in Aedes aegypti mosquito cells. PLoS Pathog 2022; 18:e1010694. [PMID: 36441781 PMCID: PMC9731432 DOI: 10.1371/journal.ppat.1010694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 12/08/2022] [Accepted: 11/11/2022] [Indexed: 11/30/2022] Open
Abstract
Aedes aegypti mosquitoes are responsible for the transmission of arthropod-borne (arbo)viruses including dengue and chikungunya virus (CHIKV) but in contrast to human hosts, arbovirus-infected mosquitoes are able to efficiently control virus replication to sub-pathological levels. Yet, our knowledge of the molecular interactions of arboviruses with their mosquito hosts is incomplete. Here, we aimed to identify and characterize novel host genes that control arbovirus replication in Aedes mosquitoes. RNA binding proteins (RBPs) are well-known to regulate immune signaling pathways in all kingdoms of life. We therefore performed a knockdown screen targeting 461 genes encoding predicted RBPs in Aedes aegypti Aag2 cells and identified 15 genes with antiviral activity against Sindbis virus. Amongst these, the three DEAD-box RNA helicases AAEL004419/Dhx15, AAEL008728, and AAEL004859 also acted as antiviral factors in dengue and CHIKV infections. Here, we explored the mechanism of Dhx15 in regulating an antiviral transcriptional response in mosquitoes by silencing Dhx15 in Aag2 cells followed by deep-sequencing of poly-A enriched RNAs. Dhx15 knockdown in uninfected and CHIKV-infected cells resulted in differential expression of 856 and 372 genes, respectively. Interestingly, amongst the consistently downregulated genes, glycolytic process was the most enriched gene ontology (GO) term as the expression of all core enzymes of the glycolytic pathway was reduced, suggesting that Dhx15 regulates glycolytic function. A decrease in lactate production indicated that Dhx15 silencing indeed functionally impaired glycolysis. Modified rates of glycolytic metabolism have been implicated in controlling the replication of several classes of viruses and strikingly, infection of Aag2 cells with CHIKV by itself also resulted in the decrease of several glycolytic genes. Our data suggests that Dhx15 regulates replication of CHIKV, and possibly other arboviruses, by controlling glycolysis in mosquito cells.
Collapse
Affiliation(s)
- Samara Rosendo Machado
- Department of Medical Microbiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Jieqiong Qu
- Department of Medical Microbiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Werner J. H. Koopman
- Department of Pediatrics, Amalia Children’s Hospital, Radboud Institute for Molecular Life Sciences, Radboud Center for Mitochondrial Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Pascal Miesen
- Department of Medical Microbiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
- * E-mail:
| |
Collapse
|
8
|
Lawson D, Vann C, Schoenfeld BJ, Haun C. Beyond Mechanical Tension: A Review of Resistance Exercise-Induced Lactate Responses & Muscle Hypertrophy. J Funct Morphol Kinesiol 2022; 7:jfmk7040081. [PMID: 36278742 PMCID: PMC9590033 DOI: 10.3390/jfmk7040081] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 09/27/2022] [Accepted: 09/29/2022] [Indexed: 11/07/2022] Open
Abstract
The present review aims to explore and discuss recent research relating to the lactate response to resistance training and the potential mechanisms by which lactate may contribute to skeletal muscle hypertrophy or help to prevent muscle atrophy. First, we will discuss foundational information pertaining to lactate including metabolism, measurement, shuttling, and potential (although seemingly elusive) mechanisms for hypertrophy. We will then provide a brief analysis of resistance training protocols and the associated lactate response. Lastly, we will discuss potential shortcomings, resistance training considerations, and future research directions regarding lactate's role as a potential anabolic agent for skeletal muscle hypertrophy.
Collapse
Affiliation(s)
- Daniel Lawson
- School of Kinesiology, Applied Health and Recreation, Oklahoma State University, Stillwater, OK 74078, USA
- Correspondence:
| | - Christopher Vann
- Duke Molecular Physiology Institute, Duke University School of Medicine, Duke University, Durham, NC 27701, USA
| | - Brad J. Schoenfeld
- Department of Exercise Science and Recreation, Lehman College of CUNY, Bronx, NY 10468, USA
| | - Cody Haun
- Fitomics, LLC, Alabaster, AL 35007, USA
| |
Collapse
|
9
|
Li M, Wang S, Liu X, Sheng Z, Li B, Li J, Zhang J, Zhang Z. Cadmium exposure decreases fasting blood glucose levels and exacerbates type-2 diabetes in a mouse model. Endocrine 2022; 76:53-61. [PMID: 35041127 DOI: 10.1007/s12020-021-02974-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 12/22/2021] [Indexed: 01/12/2023]
Abstract
PURPOSE Although the effects of cadmium (Cd) on the development of diabetes have been extensively investigated, the relationship between Cd exposure and the severity of established diabetes is unclear. Herein, we investigate the effects of long-term exposure to Cd in a streptozotocin-induced mouse model of type-2 diabetes mellitus (T2DM) and the underlying mechanism. METHODS C57BL/6 Mice were divided into the following four groups: (1) control group; (2) Cd-exposed group; (3) diabetic group; (4) Cd-exposed diabetic group. Cd exposure was established by the administration of 155 ppm CdCl2 in drinking water. After 25 weeks of treatment, serum fasting glucose and insulin were measured. Meanwhile, the liver and pancreas specimens were sectioned and stained with Hematoxylin and eosin. Gluconeogenesis, glycolysis, lactate concentration, and fibrosis in liver were evaluated. RESULTS Clinical signs attributable to diabetes were more apparent in Cd-exposed diabetic mice, while no effects of Cd exposure were found on non-diabetic mice. Cd exposure significantly decreased fasting blood glucose (FBG) levels in diabetic group. We further demonstrated that the glycolysis related hepatic enzymes, pyruvate kinase M2 (PKM-2) and lactic dehydrogenase A (LDHA) were both increased, while the gluconeogenesis related hepatic enzymes, phosphoenolpyruvate-1 (PCK-1) and glucose-6-phosphatase (G6Pase) were both decreased in Cd exposed diabetic mice, indicating that Cd increased glycolysis and inhibited gluconeogenesis in diabetic model. Moreover, lactate accumulation was noted accompanied by the increased inflammation and fibrosis in the livers of diabetic mice following Cd exposure. CONCLUSIONS Cd exposure disturbed glucose metabolism and exacerbated diabetes, providing a biological relevance that DM patients are at greater risk when exposed to Cd.
Collapse
Affiliation(s)
- Mengyang Li
- School of Public Health, Soochow University, 215123, Suzhou, China
| | - Shuai Wang
- The Shishan Community Hospital of SND in Suzhou, 215011, Suzhou, China
| | - Xiuxiu Liu
- School of Public Health, Soochow University, 215123, Suzhou, China
| | - Zhijie Sheng
- The Fifth People's Hospital in Suzhou, 215007, Suzhou, China
| | - Bingyan Li
- School of Public Health, Soochow University, 215123, Suzhou, China
| | - Jiafu Li
- School of Public Health, Soochow University, 215123, Suzhou, China
| | - Jie Zhang
- School of Public Health, Soochow University, 215123, Suzhou, China.
| | - Zengli Zhang
- School of Public Health, Soochow University, 215123, Suzhou, China.
| |
Collapse
|
10
|
Masharani U, Strycker LA, Lazar AA, Wu K, Brooks GA. Hyperlactatemia in diabetic ketoacidosis. Diabet Med 2022; 39:e14723. [PMID: 34655270 DOI: 10.1111/dme.14723] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 10/13/2021] [Indexed: 11/30/2022]
Abstract
AIMS The study examined the prevalence and degree of lactate elevation in diabetic ketoacidosis, and explored which biochemical abnormalities predicted L-lactate levels. METHODS We reviewed episodes of diabetic ketoacidosis from 79 diabetes patients (one episode per patient). Separate univariate linear regression models were specified to predict lactate level from each of nine biochemical variables. Significant predictors from the univariate models were included in a final multivariate linear regression model to predict lactate levels. RESULTS Mean (SD) lactate level was 3.05 (1.66) mmol/L; about 65% of patients had lactate levels >2 mmol/L. In the final multivariate linear regression model (R2 = 0.45), higher lactate levels were associated with greater hydrogen ion concentration (standardised β = .60, t = 4.16, p < 0.0001), higher blood glucose (standardised β = .28, t = 2.67, p = 0.009) and lower glomerular filtration rate estimated from creatinine (standardised β = -.23, t = 2.29, p = 0.025). Bicarbonate, beta-hydroxybutyrate, body mass index, mean arterial pressure and calculated osmolality were not significant predictors of lactate level. There were three distinct patterns of lactate levels with treatment of diabetic ketoacidosis: group 1 = gradual decline, group 2 = initial increase and then decline and group 3 = initial decline followed by a transient peak and subsequent decline. CONCLUSIONS Elevated lactate level is the norm in patients with diabetic ketoacidosis. Higher blood glucose levels and higher hydrogen ion concentrations are related to greater lactate. With treatment, there are different patterns of decline in lactate levels.
Collapse
Affiliation(s)
- Umesh Masharani
- Department of Medicine, University of California, San Francisco, California, USA
| | | | - Ann A Lazar
- Division of Biostatistics, University of California, San Francisco, California, USA
| | - Karin Wu
- Department of Medicine, University of California, San Francisco, California, USA
| | - George A Brooks
- Department of Integrative Biology, University of California, Berkeley, California, USA
| |
Collapse
|
11
|
Benefits of a plant-based diet and considerations for the athlete. Eur J Appl Physiol 2022; 122:1163-1178. [PMID: 35150294 DOI: 10.1007/s00421-022-04902-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 01/25/2022] [Indexed: 12/31/2022]
Abstract
Individuals may opt to follow a plant-based diet for a variety of reasons, such as religious practices, health benefits or concerns for animal or environmental welfare. Such diets offer a broad spectrum of health benefits including aiding in the prevention and management of chronic diseases. In addition to health benefits, a plant-based diet may provide performance-enhancing effects for various types of exercise due to high carbohydrate levels and the high concentration of antioxidants and phytochemicals found in a plant-based diet. However, some plant-based foods also contain anti-nutrional factors, such as phytate and tannins, which decrease the bioavailability of key nutrients, such as iron, zinc, and protein. Thus, plant-based diets must be carefully planned to ensure adequate intake and absorption of energy and all essential nutrients. The current narrative review summarizes the current state of the research concerning the implications of a plant-based diet for health and exercise performance. It also outlines strategies to enhance the bioavailability of nutrients, sources of hard-to-get nutrients, and sport supplements that could interest plant-based athletes.
Collapse
|
12
|
Borrego-Sánchez A, Vinolo-Gil MJ, de-la-Casa-Almeida M, Rodríguez-Huguet M, Casuso-Holgado MJ, Martín-Valero R. Effects of Training on Cardiorespiratory Fitness in Triathletes: A Systematic Review and Meta-Analysis. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph182413332. [PMID: 34948941 PMCID: PMC8703306 DOI: 10.3390/ijerph182413332] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/13/2021] [Accepted: 12/14/2021] [Indexed: 11/16/2022]
Abstract
Triathlon is an aerobic sport, which is commonly measured by maximal aerobic consumption (VO2max). Objective: to analyze the changes produced in cardiorespiratory and physiological measurements during practice, which determine triathletes’ performance level. A systematic review and a meta-analysis based on PRISMA protocol and registered in PROSPERO (CRD42020189076) was conducted. The research was performed using PubMed, SPORTDiscus, Embase, Dialnet, Web of Science (WOS) and MEDLINE databases during February and March 2020. Studies that measured cardiorespiratory variables in triathletes published in the last 10 years were included. Results: 713 articles were identified, with 25 studies selected for the systematic review and five articles for the meta-analysis. These articles concluded that the main cardiorespiratory variables that determine triathletes’ performance were modified depending on the triathlon segment performed and the athletes’ sex and age. The meta-analysis showed no conclusive results related to the effects of changes in VO2max in triathletes’ performance [SMD = −0.21; 95%CI: (−0.84 to 0.43)]. Conclusions: cardiorespiratory fitness, in terms of VO2max and ventilatory thresholds, is the strongest predictor of performance in triathlon. This response may be affected depending on the triathlon segment performed and the athlete’s age or sex, leading to both physiological and biomechanical alterations that affect competition performance.
Collapse
Affiliation(s)
- Alicia Borrego-Sánchez
- Department of Physiotherapy, Faculty of Health Science, Ampliacion de Campus de Teatinos, University of Malaga, C/Arquitecto Francisco Peñalosa 3, 29071 Malaga, Spain;
| | - Maria Jesus Vinolo-Gil
- Department of Nursing and Physiotherapy, Faculty of Nursing and Physiotherapy, University of Cadiz, 11009 Cadiz, Spain; (M.J.V.-G.); (M.R.-H.)
- CMU Rehabilitation Intercentres-Interlevels Puerto Real and Cadiz Hospitals, Cádiz-La Janda Health District, 11006 Cadiz, Spain
| | - Maria de-la-Casa-Almeida
- Department of Physiotherapy, Faculty of Nursing, Physiotherapy and Podiatry, University of Seville, 41009 Seville, Spain; (M.d.-l.-C.-A.); (M.J.C.-H.)
| | - Manuel Rodríguez-Huguet
- Department of Nursing and Physiotherapy, Faculty of Nursing and Physiotherapy, University of Cadiz, 11009 Cadiz, Spain; (M.J.V.-G.); (M.R.-H.)
| | - María Jesús Casuso-Holgado
- Department of Physiotherapy, Faculty of Nursing, Physiotherapy and Podiatry, University of Seville, 41009 Seville, Spain; (M.d.-l.-C.-A.); (M.J.C.-H.)
| | - Rocío Martín-Valero
- Department of Physiotherapy, Faculty of Health Science, Ampliacion de Campus de Teatinos, University of Malaga, C/Arquitecto Francisco Peñalosa 3, 29071 Malaga, Spain;
- Correspondence: ; Tel.: +34-951952858
| |
Collapse
|
13
|
Ó Maoldomhnaigh C, Cox DJ, Phelan JJ, Mitermite M, Murphy DM, Leisching G, Thong L, O'Leary SM, Gogan KM, McQuaid K, Coleman AM, Gordon SV, Basdeo SA, Keane J. Lactate Alters Metabolism in Human Macrophages and Improves Their Ability to Kill Mycobacterium tuberculosis. Front Immunol 2021; 12:663695. [PMID: 34691015 PMCID: PMC8526932 DOI: 10.3389/fimmu.2021.663695] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 09/16/2021] [Indexed: 11/13/2022] Open
Abstract
In order to mount an appropriate immune response to infection, the macrophage must alter its metabolism by increasing aerobic glycolysis and concomitantly decreasing oxidative phosphorylation; a process known as the Warburg effect. Consequently, lactate, the end-product of glycolysis, accumulates in the extracellular environment. The subsequent effect of lactate on surrounding macrophages is poorly understood. Mycobacterium tuberculosis (Mtb), the causative organism of Tuberculosis (TB), is phagocytosed by macrophages in the airways. Mtb infected macrophages upregulate aerobic glycolysis and effector functions to try to kill the bacteria. Our lab has previously shown that human macrophages produce lactate in response to infection with Mtb. Although lactate has largely been considered a waste product of aerobic glycolysis, we hypothesised that the presence of extracellular lactate would impact subsequent immunometabolic responses and modulate macrophage function. We demonstrate that the presence of exogenous lactate has an immediate effect on the cellular metabolism of resting human macrophages; causing a decrease in extracellular acidification rate (ECAR; analogous to the rate of glycolysis) and an increase in the oxygen consumption rate (OCR; analogous to oxidative phosphorylation). When lactate-treated macrophages were stimulated with Mtb or LPS, glycolysis proceeds to increase immediately upon stimulation but oxidative phosphorylation remains stable compared with untreated cells that display a decrease in OCR. This resulted in a significantly reduced ECAR/OCR ratio early in response to stimulation. Since altered metabolism is intrinsically linked to macrophage function, we examined the effect of lactate on macrophage cytokine production and ability to kill Mtb. Lactate significantly reduced the concentrations of TNF and IL-1β produced by human macrophages in response to Mtb but did not alter IL-10 and IL-6 production. In addition, lactate significantly improved bacillary clearance in human macrophages infected with Mtb, through a mechanism that is, at least in part, mediated by promoting autophagy. These data indicate that lactate, the product of glycolysis, has a negative feedback effect on macrophages resulting in an attenuated glycolytic shift upon subsequent stimulation and reduced pro-inflammatory cytokine production. Interestingly, this pro-resolution effect of lactate is associated with increased capacity to kill Mtb.
Collapse
Affiliation(s)
- Cilian Ó Maoldomhnaigh
- TB Immunology Group, Department of Clinical Medicine, Trinity Translational Medicine Institute, St James's Hospital, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Donal J Cox
- TB Immunology Group, Department of Clinical Medicine, Trinity Translational Medicine Institute, St James's Hospital, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - James J Phelan
- TB Immunology Group, Department of Clinical Medicine, Trinity Translational Medicine Institute, St James's Hospital, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Morgane Mitermite
- School of Veterinary Medicine and Conway Institute, University College Dublin, Dublin, Ireland
| | - Dearbhla M Murphy
- TB Immunology Group, Department of Clinical Medicine, Trinity Translational Medicine Institute, St James's Hospital, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Gina Leisching
- TB Immunology Group, Department of Clinical Medicine, Trinity Translational Medicine Institute, St James's Hospital, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Lorraine Thong
- TB Immunology Group, Department of Clinical Medicine, Trinity Translational Medicine Institute, St James's Hospital, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Seónadh M O'Leary
- TB Immunology Group, Department of Clinical Medicine, Trinity Translational Medicine Institute, St James's Hospital, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Karl M Gogan
- TB Immunology Group, Department of Clinical Medicine, Trinity Translational Medicine Institute, St James's Hospital, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Kate McQuaid
- TB Immunology Group, Department of Clinical Medicine, Trinity Translational Medicine Institute, St James's Hospital, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Amy M Coleman
- TB Immunology Group, Department of Clinical Medicine, Trinity Translational Medicine Institute, St James's Hospital, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Stephen V Gordon
- School of Veterinary Medicine and Conway Institute, University College Dublin, Dublin, Ireland
| | - Sharee A Basdeo
- TB Immunology Group, Department of Clinical Medicine, Trinity Translational Medicine Institute, St James's Hospital, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Joseph Keane
- TB Immunology Group, Department of Clinical Medicine, Trinity Translational Medicine Institute, St James's Hospital, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| |
Collapse
|
14
|
Liu H, Leng B, Li Q, Liu Y, Bao D, Cui Y. The Effect of Eight-Week Sprint Interval Training on Aerobic Performance of Elite Badminton Players. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18020638. [PMID: 33451086 PMCID: PMC7828502 DOI: 10.3390/ijerph18020638] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 12/27/2020] [Accepted: 01/08/2021] [Indexed: 11/25/2022]
Abstract
This study was aimed to: (1) investigate the effects of physiological functions of sprint interval training (SIT) on the aerobic capacity of elite badminton players; and (2) explore the potential mechanisms of oxygen uptake, transport and recovery within the process. Thirty-two elite badminton players volunteered to participate and were randomly divided into experimental (Male-SIT and Female-SIT group) and control groups (Male-CON and Female-CON) within each gender. During a total of eight weeks, SIT group performed three times of SIT training per week, including two power bike trainings and one multi-ball training, while the CON group undertook two Fartlek runs and one regular multi-ball training. The distance of YO-YO IR2 test (which evaluates player’s ability to recover between high intensity intermittent exercises) for Male-SIT and Female-SIT groups increased from 1083.0 ± 205.8 m to 1217.5 ± 190.5 m, and from 725 ± 132.9 m to 840 ± 126.5 m (p < 0.05), respectively, which were significantly higher than both CON groups (p < 0.05). For the Male-SIT group, the ventilatory anaerobic threshold and ventilatory anaerobic threshold in percentage of VO2max significantly increased from 3088.4 ± 450.9 mL/min to 3665.3 ± 263.5 mL/min (p < 0.05),and from 74 ± 10% to 85 ± 3% (p < 0.05) after the intervention, and the increases were significantly higher than the Male-CON group (p < 0.05); for the Female-SIT group, the ventilatory anaerobic threshold and ventilatory anaerobic threshold in percentage of VO2max were significantly elevated from 1940.1 ± 112.8 mL/min to 2176.9 ± 78.6 mL/min, and from 75 ± 4% to 82 ± 4% (p < 0.05) after the intervention, which also were significantly higher than those of the Female-CON group (p < 0.05). Finally, the lactate clearance rate was raised from 13 ± 3% to 21 ± 4% (p < 0.05) and from 21 ± 5% to 27 ± 4% for both Male-SIT and Female-SIT groups when compared to the pre-test, and this increase was significantly higher than the control groups (p < 0.05). As a training method, SIT could substantially improve maximum aerobic capacity and aerobic recovery ability by improving the oxygen uptake and delivery, thus enhancing their rapid repeated sprinting ability.
Collapse
Affiliation(s)
- Haochong Liu
- China Institute of Sport and Health Science, Beijing Sport University, Beijing 100084, China; (H.L.); (Y.L.)
| | - Bo Leng
- Sports Coaching College, Beijing Sport University, Beijing 100084, China; (B.L.); (Q.L.)
| | - Qian Li
- Sports Coaching College, Beijing Sport University, Beijing 100084, China; (B.L.); (Q.L.)
| | - Ye Liu
- China Institute of Sport and Health Science, Beijing Sport University, Beijing 100084, China; (H.L.); (Y.L.)
| | - Dapeng Bao
- China Institute of Sport and Health Science, Beijing Sport University, Beijing 100084, China; (H.L.); (Y.L.)
- Correspondence: (D.B.); (Y.C.)
| | - Yixiong Cui
- AI Sports Engineering Lab, School of Sports Engineering, Beijing Sport University, Beijing 100084, China
- Correspondence: (D.B.); (Y.C.)
| |
Collapse
|
15
|
Powell CL, Davidson AR, Brown AM. Universal Glia to Neurone Lactate Transfer in the Nervous System: Physiological Functions and Pathological Consequences. BIOSENSORS-BASEL 2020; 10:bios10110183. [PMID: 33228235 PMCID: PMC7699491 DOI: 10.3390/bios10110183] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/16/2020] [Accepted: 11/17/2020] [Indexed: 12/13/2022]
Abstract
Whilst it is universally accepted that the energy support of the brain is glucose, the form in which the glucose is taken up by neurones is the topic of intense debate. In the last few decades, the concept of lactate shuttling between glial elements and neural elements has emerged in which the glial cells glycolytically metabolise glucose/glycogen to lactate, which is shuttled to the neural elements via the extracellular fluid. The process occurs during periods of compromised glucose availability where glycogen stored in astrocytes provides lactate to the neurones, and is an integral part of the formation of learning and memory where the energy intensive process of learning requires neuronal lactate uptake provided by astrocytes. More recently sleep, myelination and motor end plate integrity have been shown to involve lactate shuttling. The sequential aspect of lactate production in the astrocyte followed by transport to the neurones is vulnerable to interruption and it is reported that such disparate pathological conditions as Alzheimer's disease, amyotrophic lateral sclerosis, depression and schizophrenia show disrupted lactate signalling between glial cells and neurones.
Collapse
Affiliation(s)
- Carolyn L. Powell
- School of Life Sciences, University of Nottingham, Nottingham NG7 2UH, UK; (C.L.P.); (A.R.D.)
| | - Anna R. Davidson
- School of Life Sciences, University of Nottingham, Nottingham NG7 2UH, UK; (C.L.P.); (A.R.D.)
| | - Angus M. Brown
- School of Life Sciences, University of Nottingham, Nottingham NG7 2UH, UK; (C.L.P.); (A.R.D.)
- Department of Neurology, University of Washington, Seattle, WA 98105, USA
- Correspondence:
| |
Collapse
|
16
|
Ząbczyk M, Natorska J, Janion-Sadowska A, Malinowski KP, Janion M, Undas A. Elevated Lactate Levels in Acute Pulmonary Embolism Are Associated with Prothrombotic Fibrin Clot Properties: Contribution of NETs Formation. J Clin Med 2020; 9:E953. [PMID: 32235490 PMCID: PMC7231195 DOI: 10.3390/jcm9040953] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/24/2020] [Accepted: 03/27/2020] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Elevated plasma lactate levels correlate with high mortality rate in acute pulmonary embolism (PE) patients. We hypothesized that elevated lactate levels correlate with prothrombotic fibrin clot properties and enhanced neutrophil extracellular trap (NET) formation in acute PE. METHODS As many as 126 normotensive acute PE patients (aged 58 ± 14 years) were enrolled. Plasma fibrin clot permeability (Ks), clot lysis time (CLT), endogenous thrombin potential (ETP), citrullinated histone H3 (citH3), and plasminogen activator inhibitor-1 antigen (PAI-1), together with plasma L-lactate levels were evaluated on admission. RESULTS Lactate levels ≥2 mM were found in 70 (55.6%) patients in whom we observed 29% higher neutrophil count and 45% elevated plasma citH3 levels. Elevated lactate levels were associated with more prothrombotic fibrin properties as reflected by 11% reduced Ks, 13% longer CLT, along with 11% increased ETP. Lactate levels were positively associated with plasma citH3 concentrations, ETP, CLT, and PAI-1 (p < 0.05). An increase of lactate levels by 1 mM leading to the prolongation of CLT by 8.82 minutes was shown in the linear regression. CONCLUSIONS Our findings suggest a new mechanism contributing to a negative impact of elevated lactate levels on prognosis in acute PE patients, in particular hypofibrinolysis, associated with enhanced NET formation.
Collapse
Affiliation(s)
- Michał Ząbczyk
- Institute of Cardiology, Jagiellonian University Medical College, 31-202 Krakow, Poland; (M.Z.); (J.N.)
- John Paul II Hospital, 31-202 Krakow, Poland
| | - Joanna Natorska
- Institute of Cardiology, Jagiellonian University Medical College, 31-202 Krakow, Poland; (M.Z.); (J.N.)
- John Paul II Hospital, 31-202 Krakow, Poland
| | - Agnieszka Janion-Sadowska
- The Faculty of Medicine and Health Sciences, The Jan Kochanowski University, 25-317 Kielce, Poland; (A.J.-S.); (M.J.)
| | - Krzysztof P. Malinowski
- Institute of Public Health, Faculty of Health Sciences, Jagiellonian University Medical College, 31-126 Krakow, Poland;
| | - Marianna Janion
- The Faculty of Medicine and Health Sciences, The Jan Kochanowski University, 25-317 Kielce, Poland; (A.J.-S.); (M.J.)
| | - Anetta Undas
- Institute of Cardiology, Jagiellonian University Medical College, 31-202 Krakow, Poland; (M.Z.); (J.N.)
- John Paul II Hospital, 31-202 Krakow, Poland
- The Faculty of Medicine and Health Sciences, The Jan Kochanowski University, 25-317 Kielce, Poland; (A.J.-S.); (M.J.)
| |
Collapse
|
17
|
Hu W, Liang YX, Luo JM, Gu XW, Chen ZC, Fu T, Zhu YY, Lin S, Diao HL, Jia B, Yang ZM. Nucleolar stress regulation of endometrial receptivity in mouse models and human cell lines. Cell Death Dis 2019; 10:831. [PMID: 31685803 PMCID: PMC6828743 DOI: 10.1038/s41419-019-2071-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 09/20/2019] [Accepted: 10/16/2019] [Indexed: 12/17/2022]
Abstract
Embryo implantation is essential to the successful establishment of pregnancy. A previous study has demonstrated that actinomycin D (ActD) could initiate the activation of mouse delayed implantation. However, the mechanism underlying this activation remains to be elucidated. A low dose of ActD is an inducer of nucleolar stress. This study was to examine whether nucleolar stress is involved in embryo implantation. We showed that nucleolar stress occurred when delayed implantation was activated by ActD in mice. ActD treatment also stimulated the Lif-STAT3 pathway. During early pregnancy, nucleolar stress was detected in the luminal epithelial cells during the receptive phase. Blastocyst-derived lactate could induce nucleolar stress in cultured luminal epithelial cells. The inhibition of nucleophosmin1 (NPM1), which was a marker of nucleolar stress, compromised uterine receptivity and decreased the implantation rates in pregnant mice. To translate these mouse data into humans, we examined nucleolar stress in human endometrium. Our data demonstrated that ActD-induced nucleolar stress had positive effects on the embryo attachment by upregulating IL32 expression in non-receptive epithelial cells rather than receptive epithelial cells. Our data should be the first to demonstrate that nucleolar stress is present during early pregnancy and is able to induce embryo implantation in both mice and humans.
Collapse
Affiliation(s)
- Wei Hu
- College of Veterinary Medicine, South China Agricultural University, 510642, Guangzhou, China
| | - Yu-Xiang Liang
- College of Veterinary Medicine, South China Agricultural University, 510642, Guangzhou, China.,Laboratory Animal Center, Shanxi Key Laboratory of Experimental Animal Science and Animal Model of Human Disease, Shanxi Medical University, 030001, Taiyuan, China.,Shanxi Key Laboratory of Birth Defect and Cell Regeneration, Shanxi Medical University, 030001, Taiyuan, China
| | - Jia-Mei Luo
- College of Veterinary Medicine, South China Agricultural University, 510642, Guangzhou, China
| | - Xiao-Wei Gu
- College of Veterinary Medicine, South China Agricultural University, 510642, Guangzhou, China
| | - Zi-Cong Chen
- College of Veterinary Medicine, South China Agricultural University, 510642, Guangzhou, China
| | - Tao Fu
- College of Veterinary Medicine, South China Agricultural University, 510642, Guangzhou, China
| | - Yu-Yuan Zhu
- College of Veterinary Medicine, South China Agricultural University, 510642, Guangzhou, China
| | - Shuai Lin
- College of Veterinary Medicine, South China Agricultural University, 510642, Guangzhou, China
| | - Hong-Lu Diao
- Reproductive Medicine Center, Renmin Hospital, Hubei University of Medicine, 442000, Shiyan, China
| | - Bo Jia
- Jiangxi Provincial Institute of Occupational Medicine, 330006, Nanchang, China
| | - Zeng-Ming Yang
- College of Veterinary Medicine, South China Agricultural University, 510642, Guangzhou, China.
| |
Collapse
|