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Jemaà M, Mokdad Gargouri R, Lang F. Polo-like kinase inhibitor BI2536 induces eryptosis. Wien Med Wochenschr 2023; 173:152-157. [PMID: 36178637 DOI: 10.1007/s10354-022-00966-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 08/17/2022] [Indexed: 11/30/2022]
Abstract
BI2536 is potent inhibitor of polo-like kinases PLK1, 2, and 3. The inhibition of PLKs in nucleated cells induces apoptosis by perturbing the cell cycle with consequent engagement of mitotic catastrophe. BI2536 is being tested as chemotherapy in various phase I/II/III clinical trials. Erythrocytes do not have a nucleus; however, they may undergo programmed suicide with characteristic hallmarks including cell shrinkage and phosphatidylserine translocation to the cell surface. This particular death is baptized eryptosis. Our study explored whether BI2536 induces eryptosis. We used flow cytometry to access death in red blood cells. We analyzed the cellular volume, the intracellular calcium concentration, the cell surface phosphatidylserine exposure, and the ceramide abundance. In addition, we analyzed the effect of BI2536 on hemolysis. Our investigation showed that after 48 h of incubation with PLK inhibitor BI2536, erythrocytes lost volume and were positive for annexin‑V without any effect on hemolysis. Cells also showed an abundance of ceramide and an increase of intracellular calcium. All these finding suggest that BI2536 provokes eryptosis in red blood cells, ostensibly in part due to Ca2+ entry and ceramide accumulation.
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Affiliation(s)
- Mohamed Jemaà
- Laboratory of Molecular Biotechnology of Eukaryotes, Sfax Biotechnology Centre, Sfax University, Sfax, Tunisia.
| | - Raja Mokdad Gargouri
- Laboratory of Molecular Biotechnology of Eukaryotes, Sfax Biotechnology Centre, Sfax University, Sfax, Tunisia
| | - Florian Lang
- Department of Physiology I, Eberhard-Karls University Tübingen, Tübingen, Germany
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2
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Mendonça MM, da Cruz KR, dos Santos Silva FC, Fontes MAP, Xavier CH. Are hemoglobin-derived peptides involved in the neuropsychiatric symptoms caused by SARS-CoV-2 infection? REVISTA BRASILEIRA DE PSIQUIATRIA (SAO PAULO, BRAZIL : 1999) 2022; 44. [PMID: 35896170 PMCID: PMC9375661 DOI: 10.47626/1516-4446-2021-2339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 02/16/2022] [Indexed: 11/29/2022]
Abstract
Follow-up of patients affected by COVID-19 has unveiled remarkable findings. Among the several sequelae caused by SARS-CoV-2 viral infection, it is particularly noteworthy that patients are prone to developing depression, anxiety, cognitive disorders, and dementia as part of the post-COVID-19 syndrome. The multisystem aspects of this disease suggest that multiple mechanisms may converge towards post-infection clinical manifestations. The literature provides mechanistic hypotheses related to changes in classical neurotransmission evoked by SARS-CoV-2 infection; nonetheless, the interaction of peripherally originated classical and non-canonic peptidergic systems may play a putative role in this neuropathology. A wealth of robust findings shows that hemoglobin-derived peptides are able to control cognition, memory, anxiety, and depression through different mechanisms. Early erythrocytic death is found during COVID-19, which would cause excess production of hemoglobin-derived peptides. Following from this premise, the present review sheds light on a possible involvement of hemoglobin-derived molecules in the COVID-19 pathophysiology by fostering neuroscientific evidence that supports the contribution of this non-canonic peptidergic pathway. This rationale may broaden knowledge beyond the currently available data, motivating further studies in the field and paving ways for novel laboratory tests and clinical approaches.
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Affiliation(s)
- Michelle Mendanha Mendonça
- Laboratório de Neurobiologia de Sistemas, Departamento de Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | - Kellen Rosa da Cruz
- Laboratório de Neurobiologia de Sistemas, Departamento de Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, GO, Brazil
| | - Fernanda Cacilda dos Santos Silva
- Laboratório de Fisiologia Cardiovascular, Departamento de Ciências Biológicas, Instituto de Ciências Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, MG, Brazil
| | - Marco Antônio Peliky Fontes
- Laboratório de Hipertensão, Departamento de Fisiologia e Biofísica, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
| | - Carlos Henrique Xavier
- Laboratório de Neurobiologia de Sistemas, Departamento de Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia, GO, Brazil
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3
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Acute Cycling Exercise Induces Changes in Red Blood Cell Deformability and Membrane Lipid Remodeling. Int J Mol Sci 2021; 22:ijms22020896. [PMID: 33477427 PMCID: PMC7831009 DOI: 10.3390/ijms22020896] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 12/31/2020] [Accepted: 01/11/2021] [Indexed: 12/15/2022] Open
Abstract
Here we describe the effects of a controlled, 30 min, high-intensity cycling test on blood rheology and the metabolic profiles of red blood cells (RBCs) and plasma from well-trained males. RBCs demonstrated decreased deformability and trended toward increased generation of microparticles after the test. Meanwhile, metabolomics and lipidomics highlighted oxidative stress and activation of membrane lipid remodeling mechanisms in order to cope with altered properties of circulation resulting from physical exertion during the cycling test. Of note, intermediates from coenzyme A (CoA) synthesis for conjugation to fatty acyl chains, in parallel with reversible conversion of carnitine and acylcarnitines, emerged as metabolites that significantly correlate with RBC deformability and the generation of microparticles during exercise. Taken together, we propose that RBC membrane remodeling and repair plays an active role in the physiologic response to exercise by altering RBC properties.
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4
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Coll-Satue C, Bishnoi S, Chen J, Hosta-Rigau L. Stepping stones to the future of haemoglobin-based blood products: clinical, preclinical and innovative examples. Biomater Sci 2021; 9:1135-1152. [DOI: 10.1039/d0bm01767a] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Critical overview of the different oxygen therapeutics developed so far to be used when donor blood is not available.
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Affiliation(s)
- Clara Coll-Satue
- Department of Health Technology
- Centre for Nanomedicine and Theranostics
- DTU Health Tech
- Technical University of Denmark
- 2800 Lyngby
| | - Shahana Bishnoi
- Department of Health Technology
- Centre for Nanomedicine and Theranostics
- DTU Health Tech
- Technical University of Denmark
- 2800 Lyngby
| | - Jiantao Chen
- Department of Health Technology
- Centre for Nanomedicine and Theranostics
- DTU Health Tech
- Technical University of Denmark
- 2800 Lyngby
| | - Leticia Hosta-Rigau
- Department of Health Technology
- Centre for Nanomedicine and Theranostics
- DTU Health Tech
- Technical University of Denmark
- 2800 Lyngby
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5
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de Jong LAW, Elekonawo FMK, Lambert M, de Gooyer JM, Verheul HMW, Burger DM, de Wilt JHW, Chatelut E, Ter Heine R, de Reuver PR, Bremers AJA, van Erp NP. Wide variation in tissue, systemic, and drain fluid exposure after oxaliplatin-based HIPEC: results of the GUTOX study. Cancer Chemother Pharmacol 2020; 86:141-150. [PMID: 32594200 PMCID: PMC7338818 DOI: 10.1007/s00280-020-04107-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 06/24/2020] [Indexed: 01/02/2023]
Abstract
Purpose In this exploratory study, the effect of postprocedural flushing with crystalloids after oxaliplatin-based hyperthermic intraperitoneal chemotherapy (HIPEC) on platinum concentrations in peritoneal tissue, blood, and drain fluid was studied. Interpatient variability in oxaliplatin pharmacokinetics and the relation between platinum concentration in peritoneal fluid and platinum exposure in tissue and blood was explored. Methods Ten patients with peritoneal carcinomatosis of colorectal origin were treated with HIPEC including postprocedural flushing, followed by ten patients without flushing afterwards. Tissue, peritoneal fluid, blood, and drain fluid samples were collected for measurement of total and ultrafiltered platinum concentrations. Results Peritoneal tissue concentration and systemic ultrafiltered platinum exposure showed large inter individual variability, ranging from 65 to 1640 µg/g dry weight and 10.5 to 28.0 µg*h/ml, respectively. No effect of flushing was found on geometric mean platinum concentration in peritoneal tissue (348 vs. 356 µg/g dry weight), blood (14.8 vs. 18.1 µg*h/ml), or drain fluid (day 1: 7.6 vs. 7.7 µg/ml; day 2: 1.7 vs. 1.9 µg/ml). The platinum concentration in peritoneal fluid at the start of HIPEC differed twofold between patients and was positively correlated with systemic exposure (p = .04) and peak plasma concentration (p = .04). Conclusion In this exploratory study, no effect was found for postprocedural flushing on platinum concentrations in peritoneal tissue, blood, or drain fluid. BSA-based HIPEC procedure leads to large interpatient variability in platinum exposure in all compartments. The study was registered at ClinicalTrials.gov on 7 December 2017 under registration number NCT03364907.
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Affiliation(s)
- Loek A W de Jong
- Department of Pharmacy, Radboud Institute for Health Sciences, Radboud University Medical Center (RUMC), P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands.
| | - Fortuné M K Elekonawo
- Department of Radiology and Nuclear Medicine, Radboud Institute for Health Sciences, Radboud University Medical Center (RUMC), P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands.,Department of Surgery, Radboud Institute for Health Sciences, Radboud University Medical Center (RUMC), P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Marie Lambert
- Institut Claudius‑Regaud, IUCT‑Oncopole, and CRCT, Université de Toulouse, Inserm, 1, avenue Irène Joliot‑Curie, Toulouse, France
| | - Jan Marie de Gooyer
- Department of Radiology and Nuclear Medicine, Radboud Institute for Health Sciences, Radboud University Medical Center (RUMC), P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands.,Department of Surgery, Radboud Institute for Health Sciences, Radboud University Medical Center (RUMC), P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Henk M W Verheul
- Department of Medical Oncology, Radboud Institute for Health Sciences, Radboud University Medical Center (RUMC), P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - David M Burger
- Department of Pharmacy, Radboud Institute for Health Sciences, Radboud University Medical Center (RUMC), P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Johannes H W de Wilt
- Department of Surgery, Radboud Institute for Health Sciences, Radboud University Medical Center (RUMC), P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Etienne Chatelut
- Institut Claudius‑Regaud, IUCT‑Oncopole, and CRCT, Université de Toulouse, Inserm, 1, avenue Irène Joliot‑Curie, Toulouse, France
| | - Rob Ter Heine
- Department of Pharmacy, Radboud Institute for Health Sciences, Radboud University Medical Center (RUMC), P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Philip R de Reuver
- Department of Surgery, Radboud Institute for Health Sciences, Radboud University Medical Center (RUMC), P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Andre J A Bremers
- Department of Surgery, Radboud Institute for Health Sciences, Radboud University Medical Center (RUMC), P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
| | - Nielka P van Erp
- Department of Pharmacy, Radboud Institute for Health Sciences, Radboud University Medical Center (RUMC), P.O. Box 9101, 6500 HB, Nijmegen, The Netherlands
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6
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Paquin-Lefebvre F, Bélair J. On the Effect of Age-Dependent Mortality on the Stability of a System of Delay-Differential Equations Modeling Erythropoiesis. Acta Biotheor 2020; 68:5-19. [PMID: 31350630 DOI: 10.1007/s10441-019-09351-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 07/10/2019] [Indexed: 11/26/2022]
Abstract
We present an age-structured model for erythropoiesis in which the mortality of mature cells is described empirically by a physiologically realistic probability distribution of survival times. Under some assumptions, the model can be transformed into a system of delay differential equations with both constant and distributed delays. The stability of the equilibrium of this system and possible Hopf bifurcations are described for a number of probability distributions. Physiological motivation and interpretation of our results are provided.
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Affiliation(s)
| | - Jacques Bélair
- Département de mathématiques et de statistique and Centre de recherches mathématiques, Université de Montréal, CP 6128 Succ. centre-ville, Montréal, QC, H3C 3J7, Canada.
- Centre for Applied Mathematics in Bioscience and Medicine, McGill University, Montréal, Canada.
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7
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Piccarducci R, Daniele S, Fusi J, Chico L, Baldacci F, Siciliano G, Bonuccelli U, Franzoni F, Martini C. Impact of ApoE Polymorphism and Physical Activity on Plasma Antioxidant Capability and Erythrocyte Membranes. Antioxidants (Basel) 2019; 8:E538. [PMID: 31717561 PMCID: PMC6912376 DOI: 10.3390/antiox8110538] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 11/06/2019] [Accepted: 11/07/2019] [Indexed: 02/07/2023] Open
Abstract
The allele epsilon 4 (ε4) of apolipoprotein E (ApoE) is the strongest genetic risk factor for Alzheimer's disease (AD). ApoE protein plays a pivotal role in the synthesis and metabolism of amyloid beta (Aβ), the major component of the extracellular plaques that constitute AD pathological hallmarks. Regular exercise is an important preventive/therapeutic tool in aging and AD. Nevertheless, the impact of physical exercise on the well-being of erythrocytes, a good model of oxidative stress and neurodegenerative processes, remains to be investigated, particularly depending on ApoE polymorphism. Herein, we evaluate the oxidative status, Aβ levels, and the membrane's composition of erythrocytes in a cohort of human subjects. In our hands, the plasma antioxidant capability (AOC), erythrocytes membrane fluidity, and the amount of phosphatidylcholine (PC) were demonstrated to be significantly decreased in the ApoE ε4 genotype and non-active subjects. In contrast, erythrocyte Aβ content and lipid peroxidation increased in ε4 carriers. Regular physical exercise was associated with an increased plasma AOC and membrane fluidity, as well as to a reduced amount of erythrocytes Aβ. Altogether, these data highlight the influence of the ApoE genotype on erythrocytes' well-being and confirm the positive impact of regular physical exercise.
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Affiliation(s)
- Rebecca Piccarducci
- Department of Pharmacy, University of Pisa, 56126 Pisa, Italy; (R.P.); (S.D.)
| | - Simona Daniele
- Department of Pharmacy, University of Pisa, 56126 Pisa, Italy; (R.P.); (S.D.)
| | - Jonathan Fusi
- Department of Clinical and Experimental Medicine, University of Pisa, 56100 Pisa, Italy; (J.F.); (L.C.); (F.B.); (G.S.); (U.B.)
| | - Lucia Chico
- Department of Clinical and Experimental Medicine, University of Pisa, 56100 Pisa, Italy; (J.F.); (L.C.); (F.B.); (G.S.); (U.B.)
| | - Filippo Baldacci
- Department of Clinical and Experimental Medicine, University of Pisa, 56100 Pisa, Italy; (J.F.); (L.C.); (F.B.); (G.S.); (U.B.)
| | - Gabriele Siciliano
- Department of Clinical and Experimental Medicine, University of Pisa, 56100 Pisa, Italy; (J.F.); (L.C.); (F.B.); (G.S.); (U.B.)
| | - Ubaldo Bonuccelli
- Department of Clinical and Experimental Medicine, University of Pisa, 56100 Pisa, Italy; (J.F.); (L.C.); (F.B.); (G.S.); (U.B.)
| | - Ferdinando Franzoni
- Department of Clinical and Experimental Medicine, University of Pisa, 56100 Pisa, Italy; (J.F.); (L.C.); (F.B.); (G.S.); (U.B.)
| | - Claudia Martini
- Department of Pharmacy, University of Pisa, 56126 Pisa, Italy; (R.P.); (S.D.)
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8
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PLUNCEVIC GLIGOROSKA J, GONTAREV S, DEJANOVA B, TODOROVSKA L, SHUKOVA STOJMANOVA D, MANCHEVSKA S. Red Blood Cell Variables in Children and Adolescents regarding the Age and Sex. IRANIAN JOURNAL OF PUBLIC HEALTH 2019; 48:704-712. [PMID: 31110981 PMCID: PMC6500523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND This study aimed to assess the basic red blood cell variables and hematological indices in children and adolescents and analyze the differences regarding age and sex. METHODS Overall, 320 young participants, age 8 to 18 yr, were enrolled at Laboratory of Sport's Medicine, Medical Faculty, Skopje, Macedonia in 2016. Capillary blood samples were drawn and following hematologic parameters were measured: the red blood cell count (RBC), hemoglobin concentration (Hb), hematocrit level (Hct) and hematological indexes: mean corpuscular volume (MCV), mean hemoglobin concentration (MCH), mean corpuscular hemoglobin concentration (MCHC) and red cell distribution width (RDW). RESULTS RBC variables in male group showed high statistical level of significance between age different groups (P=0.001) for all studied parameters except MCHC (P=0.423) and RDW (P=0.174). ANOVA test and multivariate tests in female group showed that there was no significant difference for all hematological parameters between age different groups. Regarding the sex differences, male participants had significantly higher red blood count (P<0.001), hemoglobin content (P<0.001) and hematocrit (P<0.001). CONCLUSION Hematological parameters in adolescent as inhomogeneous population are not quantified sufficiently, especially hematological indices. RBC variables, regardless of the age, differ very much between male and female examinees, in favor of the male examinees. Hematological indices were insignificantly higher in males. Regarding the age of examinees, RBC variables showed significant inter-groups differences only within male adolescents. While with girls, ages span 8 to 18 yr, we did not find significant differences for most of the hematological variables.
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Affiliation(s)
- Jasmina PLUNCEVIC GLIGOROSKA
- Institute of Physiology and Anthropology, Faculty of Medicine, University Ss Cyril and Methodius, Skopje, Republic of Macedonia,Corresponding Author:
| | - Serjoza GONTAREV
- Faculty of Physical Education, Health and Sport, University Ss Cyril and Methodius, Skopje, Republic of Macedonia
| | - Beti DEJANOVA
- Institute of Physiology and Anthropology, Faculty of Medicine, University Ss Cyril and Methodius, Skopje, Republic of Macedonia
| | - Lidija TODOROVSKA
- Institute of Physiology and Anthropology, Faculty of Medicine, University Ss Cyril and Methodius, Skopje, Republic of Macedonia
| | - Daniela SHUKOVA STOJMANOVA
- Faculty of Physical Education, Health and Sport, University Ss Cyril and Methodius, Skopje, Republic of Macedonia
| | - Sanja MANCHEVSKA
- Institute of Physiology and Anthropology, Faculty of Medicine, University Ss Cyril and Methodius, Skopje, Republic of Macedonia
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Pretorius E, Bester J, Kell DB. A Bacterial Component to Alzheimer's-Type Dementia Seen via a Systems Biology Approach that Links Iron Dysregulation and Inflammagen Shedding to Disease. J Alzheimers Dis 2018; 53:1237-56. [PMID: 27340854 PMCID: PMC5325058 DOI: 10.3233/jad-160318] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The progression of Alzheimer's disease (AD) is accompanied by a great many observable changes, both molecular and physiological. These include oxidative stress, neuroinflammation, and (more proximal to cognitive decline) the death of neuronal and other cells. A systems biology approach seeks to organize these observed variables into pathways that discriminate those that are highly involved (i.e., causative) from those that are more usefully recognized as bystander effects. We review the evidence that iron dysregulation is one of the central causative pathway elements here, as this can cause each of the above effects. In addition, we review the evidence that dormant, non-growing bacteria are a crucial feature of AD, that their growth in vivo is normally limited by a lack of free iron, and that it is this iron dysregulation that is an important factor in their resuscitation. Indeed, bacterial cells can be observed by ultrastructural microscopy in the blood of AD patients. A consequence of this is that the growing cells can shed highly inflammatory components such as lipopolysaccharides (LPS). These too are known to be able to induce (apoptotic and pyroptotic) neuronal cell death. There is also evidence that these systems interact with elements of vitamin D metabolism. This integrative systems approach has strong predictive power, indicating (as has indeed been shown) that both natural and pharmaceutical iron chelators might have useful protective roles in arresting cognitive decline, and that a further assessment of the role of microbes in AD development is more than highly warranted.
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Affiliation(s)
- Etheresia Pretorius
- Department of Physiology, Faculty of Health Sciences, University of Pretoria, Arcadia, South Africa
| | - Janette Bester
- Department of Physiology, Faculty of Health Sciences, University of Pretoria, Arcadia, South Africa
| | - Douglas B Kell
- School of Chemistry, The University of Manchester, Manchester, Lancs, UK.,The Manchester Institute of Biotechnology, The University of Manchester, Manchester, Lancs, UK.,Centre for Synthetic Biology of Fine and Speciality Chemicals, The University of Manchester, Manchester, Lancs, UK
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10
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Lew VL, Tiffert T. On the Mechanism of Human Red Blood Cell Longevity: Roles of Calcium, the Sodium Pump, PIEZO1, and Gardos Channels. Front Physiol 2017; 8:977. [PMID: 29311949 PMCID: PMC5732905 DOI: 10.3389/fphys.2017.00977] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Accepted: 11/15/2017] [Indexed: 11/13/2022] Open
Abstract
In a healthy adult, the transport of O2 and CO2 between lungs and tissues is performed by about 2 · 1013 red blood cells, of which around 1.7 · 1011 are renewed every day, a turnover resulting from an average circulatory lifespan of about 120 days. Cellular lifespan is the result of an evolutionary balance between the energy costs of maintaining cells in a fit functional state versus cell renewal. In this Review we examine how the set of passive and active membrane transporters of the mature red blood cells interact to maximize their circulatory longevity thus minimizing costs on expensive cell turnover. Red blood cell deformability is critical for optimal rheology and gas exchange functionality during capillary flow, best fulfilled when the volume of each human red blood cell is kept at a fraction of about 0.55-0.60 of the maximal spherical volume allowed by its membrane area, the optimal-volume-ratio range. The extent to which red blood cell volumes can be preserved within or near these narrow optimal-volume-ratio margins determines the potential for circulatory longevity. We show that the low cation permeability of red blood cells allows volume stability to be achieved with extraordinary cost-efficiency, favouring cell longevity over cell turnover. We suggest a mechanism by which the interplay of a declining sodium pump and two passive membrane transporters, the mechanosensitive PIEZO1 channel, a candidate mediator of Psickle in sickle cells, and the Ca2+-sensitive, K+-selective Gardos channel, can implement red blood cell volume stability around the optimal-volume-ratio range, as required for extended circulatory longevity.
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Affiliation(s)
- Virgilio L Lew
- Physiological Laboratory, Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, United Kingdom
| | - Teresa Tiffert
- Physiological Laboratory, Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, United Kingdom
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11
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α-Synuclein Aggregates with β-Amyloid or Tau in Human Red Blood Cells: Correlation with Antioxidant Capability and Physical Exercise in Human Healthy Subjects. Mol Neurobiol 2017; 55:2653-2675. [PMID: 28421539 DOI: 10.1007/s12035-017-0523-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 04/06/2017] [Indexed: 10/19/2022]
Abstract
Neurodegenerative disorders (NDs) are characterized by abnormal accumulation/misfolding of specific proteins, primarily α-synuclein (α-syn), β-amyloid1-42 (Aβ), and tau, in both brain and peripheral tissue. In addition to homo-oligomers, the role of α-syn interactions with Aβ or tau has gradually emerged. The altered protein accumulation has been related to both oxidative stress and physical activity; nevertheless, no correlation among the presence of peripheral α-syn hetero-aggregates, antioxidant capacity, and physical exercise has been discovered as of yet. Herein, the content of α-syn, Aβ, tau, and of their heterocomplexes was determined in red blood cells (RBCs) of healthy subjects (sedentary and athletes). Such parameters were related to the extent of the antioxidant capability (AOC), a key marker of oxidative stress in aging-related pathologies, and to physical exercise, which is known to play an important preventive role in NDs and to modulate oxidative stress. Tau content and plasma AOC toward hydroxyl radicals were both reduced in older or sedentary subjects; in contrast, α-syn and Aβ accumulated in elderly subjects and showed an inverse correlation with both hydroxyl AOC and the level of physical activity. For the first time, α-syn heterocomplexes with Aβ or tau were quantified and demonstrated to be inversely related to hydroxyl AOC. Furthermore, α-syn/Aβ aggregates were significantly reduced in athletes and inversely correlated with physical activity level, independent of age. The positive correlation between antioxidant capability/physical activity and reduced protein accumulation was confirmed by these data and suggested that peripheral α-syn heterocomplexes may represent new indicators of ND-related protein misfolding.
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12
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Lang E, Bissinger R, Fajol A, Salker MS, Singh Y, Zelenak C, Ghashghaeinia M, Gu S, Jilani K, Lupescu A, Reyskens KMSE, Ackermann TF, Föller M, Schleicher E, Sheffield WP, Arthur JSC, Lang F, Qadri SM. Accelerated apoptotic death and in vivo turnover of erythrocytes in mice lacking functional mitogen- and stress-activated kinase MSK1/2. Sci Rep 2015; 5:17316. [PMID: 26611568 PMCID: PMC4661433 DOI: 10.1038/srep17316] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 10/28/2015] [Indexed: 12/25/2022] Open
Abstract
The mitogen- and stress-activated kinase MSK1/2 plays a decisive role in apoptosis. In analogy to apoptosis of nucleated cells, suicidal erythrocyte death called eryptosis is characterized by cell shrinkage and cell membrane scrambling leading to phosphatidylserine (PS) externalization. Here, we explored whether MSK1/2 participates in the regulation of eryptosis. To this end, erythrocytes were isolated from mice lacking functional MSK1/2 (msk−/−) and corresponding wild-type mice (msk+/+). Blood count, hematocrit, hemoglobin concentration and mean erythrocyte volume were similar in both msk−/− and msk+/+ mice, but reticulocyte count was significantly increased in msk−/− mice. Cell membrane PS exposure was similar in untreated msk−/− and msk+/+ erythrocytes, but was enhanced by pathophysiological cell stressors ex vivo such as hyperosmotic shock or energy depletion to significantly higher levels in msk−/− erythrocytes than in msk+/+ erythrocytes. Cell shrinkage following hyperosmotic shock and energy depletion, as well as hemolysis following decrease of extracellular osmolarity was more pronounced in msk−/− erythrocytes. The in vivo clearance of autologously-infused CFSE-labeled erythrocytes from circulating blood was faster in msk−/− mice. The spleens from msk−/− mice contained a significantly greater number of PS-exposing erythrocytes than spleens from msk+/+ mice. The present observations point to accelerated eryptosis and subsequent clearance of erythrocytes leading to enhanced erythrocyte turnover in MSK1/2-deficient mice.
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Affiliation(s)
- Elisabeth Lang
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany.,Department of Gastroenterology, Hepatology and Infectious Diseases, University of Düsseldorf, Moorenstrasse 5, 40225 Düsseldorf, Germany
| | - Rosi Bissinger
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany
| | - Abul Fajol
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany
| | - Madhuri S Salker
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany
| | - Yogesh Singh
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany
| | - Christine Zelenak
- Charité Medical University Berlin, Charitéplatz 1, 10117 Berlin, Germany
| | - Mehrdad Ghashghaeinia
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany
| | - Shuchen Gu
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany.,Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - Kashif Jilani
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany.,Department of Biochemistry, University of Agriculture, 38040 Faisalabad, Pakistan
| | - Adrian Lupescu
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany
| | - Kathleen M S E Reyskens
- MRC Phosphorylation Unit, University of Dundee, Dow Street, Dundee DD1 5EH, United Kingdom.,Division of Cell Signaling and Immunology, College of Life Sciences, University of Dundee, Dow Street, Dundee DD1 5EH, United Kingdom
| | - Teresa F Ackermann
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany
| | - Michael Föller
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany.,nstitute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 2, 06120 Halle (Saale), Germany
| | - Erwin Schleicher
- Department of Internal Medicine, University of Tübingen, Otfried-Müller-Straβe 10, 72076 Tübingen, Germany
| | - William P Sheffield
- Department of Pathology and Molecular Medicine, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S4K1, Canada.,Centre for Innovation, Canadian Blood Services, 1280 Main Street West, Hamilton, Ontario L8S4K1, Canada
| | - J Simon C Arthur
- MRC Phosphorylation Unit, University of Dundee, Dow Street, Dundee DD1 5EH, United Kingdom.,Division of Cell Signaling and Immunology, College of Life Sciences, University of Dundee, Dow Street, Dundee DD1 5EH, United Kingdom
| | - Florian Lang
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany
| | - Syed M Qadri
- Department of Physiology, University of Tübingen, Gmelinstr. 5, 72076 Tübingen, Germany.,Department of Pathology and Molecular Medicine, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S4K1, Canada.,Centre for Innovation, Canadian Blood Services, 1280 Main Street West, Hamilton, Ontario L8S4K1, Canada
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