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Xu P, Wong RSM, Yan X. Early erythroferrone levels can predict the long-term haemoglobin responses to erythropoiesis-stimulating agents. Br J Pharmacol 2024; 181:2833-2850. [PMID: 38653449 DOI: 10.1111/bph.16396] [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: 09/18/2023] [Revised: 03/15/2024] [Accepted: 03/17/2024] [Indexed: 04/25/2024] Open
Abstract
BACKGROUND AND PURPOSE Our previous study reported that erythroferrone (ERFE), a newly identified hormone produced by erythroblasts, responded to recombinant human erythropoietin (rHuEPO) sensitively but its dynamics was complicated by double peaks and circadian rhythm. This study intends to elucidate the underlying mechanisms for the double peaks of ERFE dynamics and further determine whether early ERFE measurements can predict haemoglobin responses to rHuEPO. EXPERIMENTAL APPROACH By using the purified recombinant rat ERFE protein and investigating its deposition in rats, the production of ERFE was deconvoluted. To explore the role of iron in ERFE production, we monitored short-term changes of iron status after injection of rHuEPO or deferiprone. Pharmacokinetic/pharmacodynamic (PK/PD) modelling was used to confirm the mechanisms and examine the predictive ability of ERFE for long-term haemoglobin responses. KEY RESULTS The rRatERFE protein was successfully purified. The production of ERFE was deconvoluted and showed two independent peaks (2 and 8 h). Transient iron decrease was observed at 4 h after rHuEPO injection and deferiprone induced significant increases of ERFE. Based on this mechanism, the PK/PD model could characterize the complex dynamics of ERFE. In addition, the model predictions further revealed a stronger correlation between ERFE and haemoglobin peak values than that for observed values. CONCLUSIONS AND IMPLICATIONS The complex dynamics of ERFE should be composited by an immediate release and transient iron deficiency-mediated secondary production of ERFE. The early peak values of ERFE, which occur within a few hours, can predict haemoglobin responses several weeks after ESA treatment.
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Affiliation(s)
- Peng Xu
- School of Pharmacy, The Chinese University of Hong Kong, HKSAR, China
- Phase I Clinical Trial Center, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Raymond S M Wong
- Division of Hematology, Department of Medicine and Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Xiaoyu Yan
- School of Pharmacy, The Chinese University of Hong Kong, HKSAR, China
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Kumar S, Arora R, Gupta S, Ahuja N, Bhagyaraj E, Nanduri R, Kalra R, Khare AK, Kumawat S, Kaushal V, Sharma M, Gupta P. Nuclear receptor Rev-erbα role in fine-tuning erythropoietin gene expression. Blood Adv 2024; 8:3705-3717. [PMID: 38748870 PMCID: PMC11296239 DOI: 10.1182/bloodadvances.2023012228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 05/08/2024] [Indexed: 07/13/2024] Open
Abstract
ABSTRACT The regulation of red blood cell (RBC) homeostasis by erythropoietin (EPO) is critical for O2 transport and maintaining the adequate number of RBCs in vertebrates. Therefore, dysregulation in EPO synthesis results in disease conditions such as polycythemia in the case of excessive EPO production and anemia, which occurs when EPO is inadequately produced. EPO plays a crucial role in treating anemic patients; however, its overproduction can increase blood viscosity, potentially leading to fatal heart failure. Consequently, the identification of druggable transcription factors and their associated ligands capable of regulating EPO offers a promising therapeutic approach to address EPO-related disorders. This study unveils a novel regulatory mechanism involving 2 pivotal nuclear receptors (NRs), Rev-ERBA (Rev-erbα, is a truncation of reverse c-erbAa) and RAR-related orphan receptor A (RORα), in the control of EPO gene expression. Rev-erbα acts as a cell-intrinsic negative regulator, playing a vital role in maintaining erythropoiesis at the correct level. It accomplishes this by directly binding to newly identified response elements within the human and mouse EPO gene promoter, thereby repressing EPO production. These findings are further supported by the discovery that a Rev-erbα agonist (SR9011) effectively suppresses hypoxia-induced EPO expression in mice. In contrast, RORα functions as a positive regulator of EPO gene expression, also binding to the same response elements in the promoter to induce EPO production. Finally, the results of this study revealed that the 2 NRs, Rev-erbα and RORα, influence EPO synthesis in a negative and positive manner, respectively, suggesting that the modulating activity of these 2 NRs could provide a method to target disorders linked with EPO dysregulation.
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Affiliation(s)
- Sumit Kumar
- Department of Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Rashmi Arora
- Department of Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
| | - Shalini Gupta
- Department of Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Nancy Ahuja
- Department of Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Ella Bhagyaraj
- Department of Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Ravikanth Nanduri
- Department of Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Rashi Kalra
- Department of Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Asheesh Kumar Khare
- Department of Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Saumyata Kumawat
- Department of Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
| | - Vipashu Kaushal
- Department of Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
| | - Mahathi Sharma
- Department of Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Pawan Gupta
- Department of Molecular Biology, CSIR-Institute of Microbial Technology, Chandigarh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
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Ding Y, Zhao F, Hu J, Zhao Z, Shi B, Li S. A conjoint analysis of renal structure and omics characteristics reveal new insight to yak high-altitude hypoxia adaptation. Genomics 2024; 116:110857. [PMID: 38729453 DOI: 10.1016/j.ygeno.2024.110857] [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: 01/23/2024] [Revised: 04/17/2024] [Accepted: 05/05/2024] [Indexed: 05/12/2024]
Abstract
BACKGROUND Yaks have unique adaptive mechanisms to the hypoxic environment, in which the kidney plays an important role. The aim of this study was to explore the histological changes of yak kidney at different altitudes and the metabolites and genes associated with adaptation to the hypoxic environment. METHODS We analyzed the tissue structure and transcriptomic metabolomic data of yak kidney tissue at two altitudes, 2600 and 4400 m. We compared and identified the morphological adaptations of the kidney and the metabolites and genes associated with hypoxia adaptation in yaks. Changes in renal morphological adaptations, differential metabolites and genes were compared and identified, combining the two in a joint analysis. RESULTS High-altitude yak kidneys showed significant adaptive changes: increased mitochondria, increased glomerular thylakoid area, and decreased localized ribosomes. Transcriptomics and metabolomics identified 69 DAMs (Differential metabolites) and 594 DEGs (differential genes). Functional enrichment analysis showed that the DAMs were associated with protein digestion and absorption, ABC transporter, and MTOR signaling pathway; the DEGs were significantly enriched in Cholesterol metabolism and P53 signaling pathway. The joint analysis indicated that metabolites such as lysine and arginine, as well as key genes such as ABCB5 and COL1A2, were particularly affected under hypoxic conditions, whereas changes in mitochondria in the tissue structure may be related to the expression of MFN1 and OPA1, and changes in glomerular thylakoid membranes are related to VEGFA and TGFB3. CONCLUSION The kidney regulates metabolites and gene expression related to hormone synthesis, protein metabolism, and angiogenesis by adjusting the mitochondrial and glomerular thylakoid membrane structure to support the survival of yaks in high-altitude environments.
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Affiliation(s)
- Yuan Ding
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, Faculty of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
| | - Fangfang Zhao
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, Faculty of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China.
| | - Jiang Hu
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, Faculty of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
| | - Zhidong Zhao
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, Faculty of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
| | - Bingang Shi
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, Faculty of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
| | - Shaobin Li
- Gansu Key Laboratory of Herbivorous Animal Biotechnology, Faculty of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China.
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Alves S, Silva F, Esteves F, Costa S, Slezakova K, Alves M, Pereira M, Teixeira J, Morais S, Fernandes A, Queiroga F, Vaz J. The Impact of Sleep on Haematological Parameters in Firefighters. Clocks Sleep 2024; 6:291-311. [PMID: 39051311 PMCID: PMC11270419 DOI: 10.3390/clockssleep6030021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 06/18/2024] [Accepted: 06/20/2024] [Indexed: 07/27/2024] Open
Abstract
Sleep is a vital process that impacts biological functions such as cell renewal, bone regeneration, and immune system support. Disrupted sleep can interrupt erythropoiesis, leading to fewer red blood cells, reduced haemoglobin concentration, and decreased haematocrit levels, potentially contributing to haematological disorders. This is particularly concerning for shift workers for example firefighters. While previous studies have explored sleep's adverse effects on various professions, research specific to firefighters is limited. This study investigates the relationship between sleep quality and haematological parameters among firefighters in Northeast Portugal. From a sample of 201 firefighters, variations in red blood cells, haemoglobin, and haematocrit values were linked to sleep quality. The study utilised non-parametric tests (Wilcoxon-Mann-Whitney, Spearman's correlation) to explore the connection between sleep quality and haematological profile. The impact of covariates on haematological parameters was assessed using non-parametric ANCOVA (Quade's). A multiple regression analysis was employed to further understand how sleep quality and various confounding variables impact haematological levels. Findings suggest a negative link between sleep quality and haematological levels, meaning that as sleep quality deteriorates, there is a tendency for haematological levels to decrease, as indicated by Spearman's correlation (rRBC = -0.157, pRBC = 0.026; rHb = -0.158, pHb = 0.025; rHCT = -0.175, pHCT = 0.013). As observed in scientific literature, the correlation found suggests a possible inhibition of erythropoiesis, the process responsible for red blood cell production. Despite firefighters presenting a haematological profile within the reference range (RBC: 5.1 × 106/mm3 (SD ± 0.4), Hb: 15.6 g/dL (SD ± 1.3), 47% (SD ± 1.0), there is already an observable trend towards lower levels. The analysis of co-variables did not reveal a significant impact of sleep quality on haematological levels. In conclusion, this study underscores the importance of sleep quality in determining haematological parameters among firefighters. Future research should investigate the underlying mechanisms and long-term implications of poor sleep quality on firefighter health. Exploring interventions to enhance sleep quality is vital for evidence-based strategies promoting firefighter well-being.
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Affiliation(s)
- Sara Alves
- Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
| | - Francisca Silva
- Department of Veterinary Sciences, University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal (F.Q.)
| | - Filipa Esteves
- Environmental Health Department, National Institute of Health, Rua das Taipas 135, 4050-600 Porto, Portugal; (F.E.); (S.C.); (J.T.)
- EPIUnit, National Institute of Public Health, University of Porto, Rua das Taipas 135, 4050-600 Porto, Portugal
| | - Solange Costa
- Environmental Health Department, National Institute of Health, Rua das Taipas 135, 4050-600 Porto, Portugal; (F.E.); (S.C.); (J.T.)
- EPIUnit, National Institute of Public Health, University of Porto, Rua das Taipas 135, 4050-600 Porto, Portugal
| | - Klara Slezakova
- REQUIMTE/LAQV, ISEP, Polytechnic of Porto, Rua Dr. António Bernardino de Almeida, 4249-015 Porto, Portugal; (K.S.); (S.M.)
| | - Maria Alves
- AquaValor-Centro de Valorização e Transferência de Tecnologia da Água-Associação, Rua Dr. Júlio Martins n.º 1, 5400-342 Chaves, Portugal;
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal;
| | - Maria Pereira
- LEPABE-ALiCE, Faculdade de Engenharia da Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - João Teixeira
- Environmental Health Department, National Institute of Health, Rua das Taipas 135, 4050-600 Porto, Portugal; (F.E.); (S.C.); (J.T.)
- EPIUnit, National Institute of Public Health, University of Porto, Rua das Taipas 135, 4050-600 Porto, Portugal
| | - Simone Morais
- REQUIMTE/LAQV, ISEP, Polytechnic of Porto, Rua Dr. António Bernardino de Almeida, 4249-015 Porto, Portugal; (K.S.); (S.M.)
| | - Adília Fernandes
- Research Centre for Active Living and Wellbeing (LiveWell), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
| | - Felisbina Queiroga
- Department of Veterinary Sciences, University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal (F.Q.)
| | - Josiana Vaz
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal;
- Research Centre for Active Living and Wellbeing (LiveWell), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
- Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
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Abstract
PURPOSE OF REVIEW The application of spatial transcriptomics technologies to the interrogation of kidney tissue is a burgeoning effort. These technologies share a common purpose in mapping both the expression of individual molecules and entire transcriptomic signatures of kidney cell types and structures. Such information is often superimposed upon a histologic image. The resulting datasets are readily merged with other imaging and transcriptomic techniques to establish a spatially anchored atlas of the kidney. This review provides an overview of the various spatial transcriptomic technologies and recent studies in kidney disease. Potential applications gleaned from the interrogation of other organ systems, but relative to the kidney, are also discussed. RECENT FINDINGS Spatial transcriptomic technologies have enabled localization of whole transcriptome mRNA expression, correlation of mRNA to histology, measurement of in situ changes in expression across time, and even subcellular localization of transcripts within the kidney. These innovations continue to aid in the development of human cellular atlases of the kidney, the reclassification of disease, and the identification of important therapeutic targets. SUMMARY Spatial localization of gene expression will complement our current understanding of disease derived from single cell RNA sequencing, histopathology, protein immunofluorescence, and electron microscopy. Although spatial technologies continue to evolve rapidly, their importance in the localization of disease signatures is already apparent. Further efforts are required to integrate whole transcriptome and subcellular expression signatures into the individualized assessment of human kidney disease.
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Affiliation(s)
- Ricardo Melo Ferreira
- Department of Medicine, Division of Nephrology, Indiana University School of Medicine, Indianapolis IN, USA
| | - Debora Gisch
- Department of Medicine, Division of Nephrology, Indiana University School of Medicine, Indianapolis IN, USA
| | - Michael T. Eadon
- Department of Medicine, Division of Nephrology, Indiana University School of Medicine, Indianapolis IN, USA
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Adamovich Y, Dandavate V, Asher G. Circadian clocks' interactions with oxygen sensing and signalling. Acta Physiol (Oxf) 2022; 234:e13770. [PMID: 34984824 DOI: 10.1111/apha.13770] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 09/14/2021] [Accepted: 01/01/2022] [Indexed: 12/14/2022]
Abstract
In mammals, physiology and metabolism are shaped both by immediate and anticipatory responses to environmental changes through the myriad of molecular mechanisms. Whilst the former is mostly mediated through different acute signalling pathways the latter is primarily orchestrated by the circadian clock. Oxygen is vital for life and as such mammals have evolved different mechanisms to cope with changes in oxygen levels. It is widely accepted that oxygen sensing through the HIF-1 signalling pathway is paramount for the acute response to changes in oxygen levels. Circadian clocks are molecular oscillators that control 24 hours rhythms in various aspects of physiology and behaviour. Evidence emerging in recent years points towards pervasive molecular and functional interactions between these two pathways on multiple levels. Daily oscillations in oxygen levels are circadian clock-controlled and can reset the clock through HIF-1. Furthermore, the circadian clock appears to modulate the hypoxic response. We review herein the literature related to the crosstalk between the circadian clockwork and the oxygen-signalling pathway in mammals at the molecular and physiological level both under normal and pathologic conditions.
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Affiliation(s)
- Yaarit Adamovich
- Department of Biomolecular Sciences Weizmann Institute of Science Rehovot Israel
| | - Vaishnavi Dandavate
- Department of Biomolecular Sciences Weizmann Institute of Science Rehovot Israel
| | - Gad Asher
- Department of Biomolecular Sciences Weizmann Institute of Science Rehovot Israel
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