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Lemay SE, Grobs Y, Romanet C, Martineau S, Salem M, Shimauchi T, Breuils-Bonnet S, Bourgeois A, Théberge C, Pelletier A, Potus F, Provencher S, Bonnet S, Boucherat O. Hypusine Signaling Promotes Pulmonary Vascular Remodeling in Pulmonary Arterial Hypertension. Am J Respir Crit Care Med 2024; 209:1376-1391. [PMID: 38261723 DOI: 10.1164/rccm.202305-0909oc] [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: 05/25/2023] [Accepted: 01/23/2024] [Indexed: 01/25/2024] Open
Abstract
Rationale: The ubiquitous polyamine spermidine is essential for cell survival and proliferation. One important function of spermidine is to serve as a substrate for hypusination, a posttranslational modification process that occurs exclusively on eukaryotic translation factor 5A (eIF5A) and ensures efficient translation of various gene products. Pulmonary arterial hypertension (PAH) is a life-threatening disease characterized by progressive obliteration of the small pulmonary arteries (PAs) caused by excessive proliferation of PA smooth muscle cells (PASMCs) and suppressed apoptosis. Objectives: To characterize the role of hypusine signaling in PAH. Methods: Molecular, genetic, and pharmacological approaches were used both in vitro and in vivo to investigate the role of hypusine signaling in pulmonary vascular remodeling. Measurements and Main Results: Hypusine forming enzymes-deoxyhypusine synthase (DHPS) and deoxyhypusine hydroxylase (DOHH)-and hypusinated eukaryotic translation factor 5A are overexpressed in distal PAs and isolated PASMCs from PAH patients and animal models. In vitro, inhibition of DHPS using N1-guanyl-1,7-diaminoheptane or shRNA resulted in a decrease in PAH-PASMC resistance to apoptosis and proliferation. In vivo, inactivation of one allele of Dhps targeted to smooth muscle cells alleviates PAH in mice, and its pharmacological inhibition significantly decreases pulmonary vascular remodeling and improves hemodynamics and cardiac function in two rat models of established PAH. With mass spectrometry, hypusine signaling is shown to promote the expression of a broad array of proteins involved in oxidative phosphorylation, thus supporting the bioenergetic requirements of cell survival and proliferation. Conclusions: These findings support inhibiting hypusine signaling as a potential treatment for PAH.
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MESH Headings
- Animals
- Vascular Remodeling/drug effects
- Vascular Remodeling/physiology
- Rats
- Signal Transduction
- Humans
- Pulmonary Arterial Hypertension/physiopathology
- Pulmonary Arterial Hypertension/drug therapy
- Pulmonary Arterial Hypertension/metabolism
- Male
- Disease Models, Animal
- Pulmonary Artery/physiopathology
- Pulmonary Artery/drug effects
- Mice
- Peptide Initiation Factors/metabolism
- Peptide Initiation Factors/genetics
- Myocytes, Smooth Muscle/drug effects
- Myocytes, Smooth Muscle/metabolism
- Eukaryotic Translation Initiation Factor 5A
- Cell Proliferation/drug effects
- Oxidoreductases Acting on CH-NH Group Donors/genetics
- Oxidoreductases Acting on CH-NH Group Donors/metabolism
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Muscle, Smooth, Vascular/physiopathology
- Hypertension, Pulmonary/physiopathology
- Hypertension, Pulmonary/metabolism
- Lysine/analogs & derivatives
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Affiliation(s)
- Sarah-Eve Lemay
- Pulmonary Hypertension Research Group, Québec Heart and Lung Institute Research Centre, Quebec City, Quebec, Canada; and
| | - Yann Grobs
- Pulmonary Hypertension Research Group, Québec Heart and Lung Institute Research Centre, Quebec City, Quebec, Canada; and
| | - Charlotte Romanet
- Pulmonary Hypertension Research Group, Québec Heart and Lung Institute Research Centre, Quebec City, Quebec, Canada; and
| | - Sandra Martineau
- Pulmonary Hypertension Research Group, Québec Heart and Lung Institute Research Centre, Quebec City, Quebec, Canada; and
| | - Mabrouka Salem
- Pulmonary Hypertension Research Group, Québec Heart and Lung Institute Research Centre, Quebec City, Quebec, Canada; and
| | - Tsukasa Shimauchi
- Pulmonary Hypertension Research Group, Québec Heart and Lung Institute Research Centre, Quebec City, Quebec, Canada; and
| | - Sandra Breuils-Bonnet
- Pulmonary Hypertension Research Group, Québec Heart and Lung Institute Research Centre, Quebec City, Quebec, Canada; and
| | - Alice Bourgeois
- Pulmonary Hypertension Research Group, Québec Heart and Lung Institute Research Centre, Quebec City, Quebec, Canada; and
| | - Charlie Théberge
- Pulmonary Hypertension Research Group, Québec Heart and Lung Institute Research Centre, Quebec City, Quebec, Canada; and
| | - Andréanne Pelletier
- Pulmonary Hypertension Research Group, Québec Heart and Lung Institute Research Centre, Quebec City, Quebec, Canada; and
| | - François Potus
- Pulmonary Hypertension Research Group, Québec Heart and Lung Institute Research Centre, Quebec City, Quebec, Canada; and
| | - Steeve Provencher
- Pulmonary Hypertension Research Group, Québec Heart and Lung Institute Research Centre, Quebec City, Quebec, Canada; and
- Department of Medicine, Laval University, Quebec City, Quebec, Canada
| | - Sébastien Bonnet
- Pulmonary Hypertension Research Group, Québec Heart and Lung Institute Research Centre, Quebec City, Quebec, Canada; and
- Department of Medicine, Laval University, Quebec City, Quebec, Canada
| | - Olivier Boucherat
- Pulmonary Hypertension Research Group, Québec Heart and Lung Institute Research Centre, Quebec City, Quebec, Canada; and
- Department of Medicine, Laval University, Quebec City, Quebec, Canada
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An Undefined Interaction between Polyamines and Heat Shock Proteins Leads to Cellular Protection in Plasmodium falciparum and Proliferating Cells in Various Organisms. Molecules 2023; 28:molecules28041686. [PMID: 36838674 PMCID: PMC9958663 DOI: 10.3390/molecules28041686] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 02/06/2023] [Indexed: 02/12/2023] Open
Abstract
Environmental stimuli can distress the internal reaction of cells and their normal function. To react promptly to sudden environmental changes, a cascade of heat shock proteins (Hsps) functions to protect and act as housekeepers inside the cells. In parallel to the heat shock response, the metabolic polyamine (PA) status changes. Here, we discuss possible ways of putative interactions between Hsps and polyamines in a wide lineage of eukaryotic model organisms with a particular focus on parasitic protozoa such as Plasmodium falciparum (P. falciparum). The supposed interaction between polyamines and Hsps may protect the parasite from the sudden change in temperature during transmission from the female Anopheles mosquito to a human host. Recent experiments performed with the spermidine mimetic inhibitor 15-deoxyspergualine in Plasmodium in vitro cultures show that the drug binds to the C-terminal EEVD motif of Hsp70. This leads to inhibition of protein biosynthesis caused by prevention of eIF5A2 phosphorylation and eukaryotic initiation factor 5A (eIF5A) modification. These observations provide further evidence that PAs are involved in the regulation of protein biosynthesis of Hsps to achieve a protective effect for the parasite during transmission.
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Bi D, Lin J, Luo X, Lin L, Tang X, Luo X, Lu Y, Huang X. Biochemical characteristics of patients with imported malaria. Front Cell Infect Microbiol 2022; 12:1008430. [DOI: 10.3389/fcimb.2022.1008430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 09/13/2022] [Indexed: 11/11/2022] Open
Abstract
ObjectivesThis study aimed to investigate the clinical and biochemical profiles of patients with imported malaria infection between 1 January 2011 and 30 April 2022 and admitted to the Fourth People’s Hospital of Nanning.MethodsThis cohort study enrolled 170 patients with conformed imported malaria infection. The clinical and biochemical profiles of these participants were analyzed with malaria parasite clearance, and signs and symptoms related to malaria disappearance were defined as the primary outcome. A multivariable logistic regression model was used to evaluate the odds ratios (ORs) with 95% confidence intervals (CIs) for cerebral malaria. The Cox model was used to estimate the hazard ratios (HRs) with 95% CIs for parasite clearance.ResultsAdenosine deaminase and parasitemia were found to be independent risk factors for severe malaria in patients with imported malaria (OR = 1.0088, 95% CI: 1.0010–1.0167, p = 0.0272 and OR = 2.0700, 95% CI: 1.2584–3.4050, p = 0.0042, respectively). A 0.5–standard deviation (SD) increase of variation for urea (HR = 0.6714, 95% CI: 0.4911–0.9180), a 0.5-SD increase of variation for creatinine (HR = 0.4566, 95% CI: 0.2762–0.7548), a 0.25-SD increase of variation for albumin (HR = 0.4947, 95% CI: 0.3197–0.7653), a 0.25-SD increase of variation for hydroxybutyrate dehydrogenase (HR = 0.6129, 95% CI: 0.3995–0.9402), and a 1.0-SD increase of variation for ferritin (HR = 0.5887, 95% CI: 0.3799–0.9125) were associated with a higher risk for increased parasite clearance duration than a low-level change.ConclusionsAspartate aminotransferase, urea, creatinine, albumin, hydroxybutyrate dehydrogenase, and ferritin are useful biochemical indicators in routine clinical practice to evaluate prognosis for imported malaria.
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Barba-Aliaga M, Alepuz P. Role of eIF5A in Mitochondrial Function. Int J Mol Sci 2022; 23:1284. [PMID: 35163207 PMCID: PMC8835957 DOI: 10.3390/ijms23031284] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 01/19/2022] [Accepted: 01/21/2022] [Indexed: 12/17/2022] Open
Abstract
The eukaryotic translation initiation factor 5A (eIF5A) is an evolutionarily conserved protein that binds ribosomes to facilitate the translation of peptide motifs with consecutive prolines or combinations of prolines with glycine and charged amino acids. It has also been linked to other molecular functions and cellular processes, such as nuclear mRNA export and mRNA decay, proliferation, differentiation, autophagy, and apoptosis. The growing interest in eIF5A relates to its association with the pathogenesis of several diseases, including cancer, viral infection, and diabetes. It has also been proposed as an anti-aging factor: its levels decay in aged cells, whereas increasing levels of active eIF5A result in the rejuvenation of the immune and vascular systems and improved brain cognition. Recent data have linked the role of eIF5A in some pathologies with its function in maintaining healthy mitochondria. The eukaryotic translation initiation factor 5A is upregulated under respiratory metabolism and its deficiency reduces oxygen consumption, ATP production, and the levels of several mitochondrial metabolic enzymes, as well as altering mitochondria dynamics. However, although all the accumulated data strongly link eIF5A to mitochondrial function, the precise molecular role and mechanisms involved are still unknown. In this review, we discuss the findings linking eIF5A and mitochondria, speculate about its role in regulating mitochondrial homeostasis, and highlight its potential as a target in diseases related to energy metabolism.
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Affiliation(s)
- Marina Barba-Aliaga
- Instituto de Biotecnología y Biomedicina (Biotecmed), Universitat de València, 46100 València, Spain
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas, Universitat de València, 46100 València, Spain
| | - Paula Alepuz
- Instituto de Biotecnología y Biomedicina (Biotecmed), Universitat de València, 46100 València, Spain
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas, Universitat de València, 46100 València, Spain
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Kaiser A, Agostinelli E. Hypusinated EIF5A as a feasible drug target for Advanced Medicinal Therapies in the treatment of pathogenic parasites and therapy-resistant tumors. Amino Acids 2022; 54:501-511. [DOI: 10.1007/s00726-021-03120-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 12/21/2021] [Indexed: 11/30/2022]
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