1
|
Vergou GA, Bajhaiya AK, Corredor L, Lema Asqui S, Timmerman E, Impens F, Funk C. In vivo proteolytic profiling of the type I and type II metacaspases in Chlamydomonas reinhardtii exposed to salt stress. PHYSIOLOGIA PLANTARUM 2024; 176:e14401. [PMID: 38899462 DOI: 10.1111/ppl.14401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 04/29/2024] [Accepted: 05/07/2024] [Indexed: 06/21/2024]
Abstract
Metacaspases are cysteine proteases present in plants, fungi and protists. While the association of metacaspases with cell death is studied in a range of organisms, their native substrates are largely unknown. Here, we explored the in vivo proteolytic landscape of the two metacaspases, CrMCA-I and CrMCA-II, present in the green freshwater alga Chlamydomonas reinhardtii, using mass spectrometry-based degradomics approach, during control conditions and salt stress. Comparison between the cleavage events of CrMCA-I and CrMCA-II in metacaspase mutants revealed unique cleavage preferences and substrate specificity. Degradome analysis demonstrated the relevance of the predicted metacaspase substrates to the physiology of C. reinhardtii cells and its adaptation during salt stress. Functional enrichment analysis indicated an involvement of CrMCA-I in the catabolism of carboxylic acids, while CrMCA-II plays an important role in photosynthesis and translation. Altogether, our findings suggest distinct cellular functions of the two metacaspases in C. reinhardtii during salt stress response.
Collapse
Affiliation(s)
| | | | | | | | - Evy Timmerman
- VIB-UGent Center for Medical Biotechnology, VIB, Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- VIB Proteomics Core, VIB-UGent Center for Medical Biotechnology, Ghent, Belgium
| | - Francis Impens
- VIB-UGent Center for Medical Biotechnology, VIB, Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
- VIB Proteomics Core, VIB-UGent Center for Medical Biotechnology, Ghent, Belgium
| | | |
Collapse
|
2
|
Lambert L, de Carpentier F, André P, Marchand CH, Danon A. Type II metacaspase mediates light-dependent programmed cell death in Chlamydomonas reinhardtii. PLANT PHYSIOLOGY 2024; 194:2648-2662. [PMID: 37971939 PMCID: PMC10980519 DOI: 10.1093/plphys/kiad618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 10/12/2023] [Accepted: 10/22/2023] [Indexed: 11/19/2023]
Abstract
Among the crucial processes that preside over the destiny of cells from any type of organism are those involving their self-destruction. This process is well characterized and conceptually logical to understand in multicellular organisms; however, the levels of knowledge and comprehension of its existence are still quite enigmatic in unicellular organisms. We use Chlamydomonas (Chlamydomonas reinhardtii) to lay the foundation for understanding the mechanisms of programmed cell death (PCD) in a unicellular photosynthetic organism. In this paper, we show that while PCD induces the death of a proportion of cells, it allows the survival of the remaining population. A quantitative proteomic analysis aiming at unveiling the proteome of PCD in Chlamydomonas allowed us to identify key proteins that led to the discovery of essential mechanisms. We show that in Chlamydomonas, PCD relies on the light dependence of a photosynthetic organism to generate reactive oxygen species and induce cell death. Finally, we obtained and characterized mutants for the 2 metacaspase genes in Chlamydomonas and showed that a type II metacaspase is essential for PCD execution.
Collapse
Affiliation(s)
- Lou Lambert
- Institut de Biologie Paris Seine, UMR 7238, CNRS, Sorbonne Université, Paris 75005, France
| | - Félix de Carpentier
- Institut de Biologie Paris Seine, UMR 7238, CNRS, Sorbonne Université, Paris 75005, France
- Doctoral School of Plant Sciences, Université Paris-Saclay, Saint-Aubin 91190, France
| | - Phuc André
- Institut de Biologie Paris Seine, UMR 7238, CNRS, Sorbonne Université, Paris 75005, France
| | - Christophe H Marchand
- Institut de Biologie Paris Seine, UMR 7238, CNRS, Sorbonne Université, Paris 75005, France
- Institut de Biologie Physico-Chimique, Centre National de la Recherche Scientifique (CNRS), Paris F-75005, France
| | - Antoine Danon
- Institut de Biologie Paris Seine, UMR 7238, CNRS, Sorbonne Université, Paris 75005, France
| |
Collapse
|
3
|
Feng C, Stetina SR, Erpelding JE. Transcriptome Analysis of Resistant Cotton Germplasm Responding to Reniform Nematodes. PLANTS (BASEL, SWITZERLAND) 2024; 13:958. [PMID: 38611488 PMCID: PMC11013486 DOI: 10.3390/plants13070958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 03/22/2024] [Accepted: 03/23/2024] [Indexed: 04/14/2024]
Abstract
Reniform nematode (Rotylenchulus reniformis) is an important microparasite for Upland cotton (Gossypium hirsutum L.) production. Growing resistant cultivars is the most economical management method, but only a few G. barbadense genotypes and some diploid Gossypium species confer high levels of resistance. This study conducted a transcriptome analysis of resistant genotypes to identify genes involved in host plant defense. Seedlings of G. arboreum accessions PI 529728 (A2-100) and PI 615699 (A2-190), and G. barbadense genotypes PI 608139 (GB 713) and PI 163608 (TX 110), were inoculated with the reniform nematode population MSRR04 and root samples were collected on the fifth (D5) and ninth (D9) day after inoculation. Differentially expressed genes (DEGs) were identified by comparing root transcriptomes from inoculated plants with those from non-inoculated plants. Accessions A2-100 and A2-190 showed 52 and 29 DEGs on D5, respectively, with 14 DEGs in common, and 18 DEGs for A2-100 and 11 DEGs for A2-190 on chromosome 5. On D9, four DEGs were found in A2-100 and two DEGs in A2-190. For GB 713, 52 and 43 DEGs were found, and for TX 110, 29 and 117 DEGs were observed on D5 and D9, respectively. Six DEGs were common at the two sampling times for these genotypes. Some DEGs were identified as Meloidogyne-induced cotton (MIC) 3 and 4, resistance gene analogs, or receptor-like proteins. Other DEGs have potential roles in plant defense, such as peroxidases, programmed cell death, pathogenesis related proteins, and systemic acquired resistance. Further research on these DEGs will aid in understanding the mechanisms of resistance to explore new applications for the development of resistant cultivars.
Collapse
Affiliation(s)
- Chunda Feng
- USDA Agricultural Research Service, Crop Genetics Research Unit, Stoneville, MS 38776, USA
| | - Salliana R Stetina
- USDA Agricultural Research Service, Crop Genetics Research Unit, Stoneville, MS 38776, USA
| | - John E Erpelding
- USDA Agricultural Research Service, Crop Genetics Research Unit, Stoneville, MS 38776, USA
| |
Collapse
|
4
|
Zou Y, Sabljić I, Horbach N, Dauphinee AN, Åsman A, Sancho Temino L, Minina EA, Drag M, Stael S, Poreba M, Ståhlberg J, Bozhkov PV. Thermoprotection by a cell membrane-localized metacaspase in a green alga. THE PLANT CELL 2024; 36:665-687. [PMID: 37971931 PMCID: PMC10896300 DOI: 10.1093/plcell/koad289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 10/10/2023] [Accepted: 11/12/2023] [Indexed: 11/19/2023]
Abstract
Caspases are restricted to animals, while other organisms, including plants, possess metacaspases (MCAs), a more ancient and broader class of structurally related yet biochemically distinct proteases. Our current understanding of plant MCAs is derived from studies in streptophytes, and mostly in Arabidopsis (Arabidopsis thaliana) with 9 MCAs with partially redundant activities. In contrast to streptophytes, most chlorophytes contain only 1 or 2 uncharacterized MCAs, providing an excellent platform for MCA research. Here we investigated CrMCA-II, the single type-II MCA from the model chlorophyte Chlamydomonas (Chlamydomonas reinhardtii). Surprisingly, unlike other studied MCAs and similar to caspases, CrMCA-II dimerizes both in vitro and in vivo. Furthermore, activation of CrMCA-II in vivo correlated with its dimerization. Most of CrMCA-II in the cell was present as a proenzyme (zymogen) attached to the plasma membrane (PM). Deletion of CrMCA-II by genome editing compromised thermotolerance, leading to increased cell death under heat stress. Adding back either wild-type or catalytically dead CrMCA-II restored thermoprotection, suggesting that its proteolytic activity is dispensable for this effect. Finally, we connected the non-proteolytic role of CrMCA-II in thermotolerance to the ability to modulate PM fluidity. Our study reveals an ancient, MCA-dependent thermotolerance mechanism retained by Chlamydomonas and probably lost during the evolution of multicellularity.
Collapse
Affiliation(s)
- Yong Zou
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, SE-756 51 Uppsala, Sweden
| | - Igor Sabljić
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, SE-756 51 Uppsala, Sweden
| | - Natalia Horbach
- Department of Chemical Biology and Bioimaging, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland
| | - Adrian N Dauphinee
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, SE-756 51 Uppsala, Sweden
| | - Anna Åsman
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, SE-756 51 Uppsala, Sweden
| | - Lucia Sancho Temino
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, SE-756 51 Uppsala, Sweden
| | - Elena A Minina
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, SE-756 51 Uppsala, Sweden
| | - Marcin Drag
- Department of Chemical Biology and Bioimaging, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland
| | - Simon Stael
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, SE-756 51 Uppsala, Sweden
| | - Marcin Poreba
- Department of Chemical Biology and Bioimaging, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland
| | - Jerry Ståhlberg
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, SE-756 51 Uppsala, Sweden
| | - Peter V Bozhkov
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences and Linnean Center for Plant Biology, SE-756 51 Uppsala, Sweden
| |
Collapse
|
5
|
Wu D, Tian H, Xu F, Yang J, Feng W, Bell S, Gozdzik J, Gao F, Jetter R, Zhang Y. The prodomain of Arabidopsis metacaspase 2 positively regulates immune signaling mediated by pattern-recognition receptors. THE NEW PHYTOLOGIST 2024; 241:430-443. [PMID: 37920109 DOI: 10.1111/nph.19365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 09/29/2023] [Indexed: 11/04/2023]
Abstract
Metacaspases (MCs) are structural homologs of mammalian caspases found in plants, fungi, and protozoa. Type-I MCs carry an N-terminal prodomain, the function of which is unclear. Through genetic analysis of Arabidopsis mc2-1, a T-DNA insertion mutant of MC2, we demonstrated that the prodomain of metacaspase 2 (MC2) promotes immune signaling mediated by pattern-recognition receptors (PRRs). In mc2-1, immune responses are constitutively activated. The receptor-like kinases (RLKs) BAK1/BKK1 and SOBIR1 are required for the autoimmune phenotype of mc2-1, suggesting that immune signaling mediated by the receptor-like protein (RLP)-type PRRs is activated in mc2-1. A suppressor screen identified multiple mutations in the first exon of MC2, which suppress the autoimmunity in mc2-1. Further analysis revealed that the T-DNA insertion at the end of exon 1 of MC2 causes elevated expression of the MC2 prodomain, and overexpression of the MC2 prodomain in wild-type (WT) plants results in the activation of immune responses. The MC2 prodomain interacts with BIR1, which inhibits RLP-mediated immune signaling by interacting with BAK1, suggesting that the MC2 prodomain promotes plant defense responses by interfering with the function of BIR1. Our study uncovers an unexpected function of the prodomain of a MC in plant immunity.
Collapse
Affiliation(s)
- Di Wu
- Department of Botany, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
| | - Hainan Tian
- Department of Botany, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
| | - Fan Xu
- Department of Botany, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
| | - Jianfei Yang
- Department of Botany, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
- College of Life Science, Northeast Forestry University, Harbin, 150040, China
| | - Wenqi Feng
- Department of Botany, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
| | - Sydney Bell
- Department of Chemistry, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada
| | - Jedrzej Gozdzik
- Department of Chemistry, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada
| | - Fang Gao
- Department of Botany, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
| | - Reinhard Jetter
- Department of Botany, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
- Department of Chemistry, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada
| | - Yuelin Zhang
- Department of Botany, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
- College of Life Sciences, Sichuan University, Chengdu, 610065, China
| |
Collapse
|
6
|
Merchán-Gaitán JB, Mendes JHL, Nunes LEC, Buss DS, Rodrigues SP, Fernandes PMB. The Role of Plant Latex in Virus Biology. Viruses 2023; 16:47. [PMID: 38257746 PMCID: PMC10819414 DOI: 10.3390/v16010047] [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: 12/21/2023] [Accepted: 12/25/2023] [Indexed: 01/24/2024] Open
Abstract
At least 20,000 plant species produce latex, a capacity that appears to have evolved independently on numerous occasions. With a few exceptions, latex is stored under pressure in specialized cells known as laticifers and is exuded upon injury, leading to the assumption that it has a role in securing the plant after mechanical injury. In addition, a defensive effect against insect herbivores and fungal infections has been well established. Latex also appears to have effects on viruses, and laticifers are a hostile environment for virus colonization. Only one example of successful colonization has been reported: papaya meleira virus (PMeV) and papaya meleira virus 2 (PMeV2) in Carica papaya. In this review, a summary of studies that support both the pro- and anti-viral effects of plant latex compounds is provided. The latex components represent a promising natural source for the discovery of new pro- and anti-viral molecules in the fields of agriculture and medicine.
Collapse
Affiliation(s)
| | - João H. L. Mendes
- Multidisciplinary Core for Research in Biology, Campus Duque de Caxias, Federal University of Rio de Janeiro, Duque de Caxias 25240-005, RJ, Brazil; (J.H.L.M.); (L.E.C.N.)
| | - Lucas E. C. Nunes
- Multidisciplinary Core for Research in Biology, Campus Duque de Caxias, Federal University of Rio de Janeiro, Duque de Caxias 25240-005, RJ, Brazil; (J.H.L.M.); (L.E.C.N.)
| | - David S. Buss
- School of Life Sciences, Keele University, Newcastle ST5 5BG, UK;
| | - Silas P. Rodrigues
- Multidisciplinary Core for Research in Biology, Campus Duque de Caxias, Federal University of Rio de Janeiro, Duque de Caxias 25240-005, RJ, Brazil; (J.H.L.M.); (L.E.C.N.)
| | | |
Collapse
|
7
|
Diogo-Jr R, de Resende Von Pinho EV, Pinto RT, Zhang L, Condori-Apfata JA, Pereira PA, Vilela DR. Maize heat shock proteins-prospection, validation, categorization and in silico analysis of the different ZmHSP families. STRESS BIOLOGY 2023; 3:37. [PMID: 37981586 PMCID: PMC10482818 DOI: 10.1007/s44154-023-00104-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 07/05/2023] [Indexed: 11/21/2023]
Abstract
Among the plant molecular mechanisms capable of effectively mitigating the effects of adverse weather conditions, the heat shock proteins (HSPs), a group of chaperones with multiple functions, stand out. At a time of full progress on the omic sciences, they look very promising in the genetic engineering field, especially in order to conceive superior genotypes, potentially tolerant to abiotic stresses (AbSts). Recently, some works concerning certain families of maize HSPs (ZmHSPs) were published. However, there was still a lack of a study that, with a high degree of criteria, would fully conglomerate them. Using distinct but complementary strategies, we have prospected as many ZmHSPs candidates as possible, gathering more than a thousand accessions. After detailed data mining, we accounted for 182 validated ones, belonging to seven families, which were subcategorized into classes with potential for functional parity. In them, we identified dozens of motifs with some degree of similarity with proteins from different kingdoms, which may help explain some of their still poorly understood means of action. Through in silico and in vitro approaches, we compared their expression levels after controlled exposure to several AbSts' sources, applied at diverse tissues, on varied phenological stages. Based on gene ontology concepts, we still analyzed them from different perspectives of term enrichment. We have also searched, in model plants and close species, for potentially orthologous genes. With all these new insights, which culminated in a plentiful supplementary material, rich in tables, we aim to constitute a fertile consultation source for those maize researchers attracted by these interesting stress proteins.
Collapse
Affiliation(s)
- Rubens Diogo-Jr
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN, (47907), USA.
- Department of Agriculture, Federal University of Lavras (UFLA), Lavras, MG, (37200-900), Brazil.
| | | | - Renan Terassi Pinto
- Faculty of Philosophy and Sciences at Ribeirao Preto, University of Sao Paulo (USP), Ribeirao Preto, SP, (14040-901), Brazil
| | - Lingrui Zhang
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN, (47907), USA
| | - Jorge Alberto Condori-Apfata
- Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN, (47907), USA
- Faculty of Engineering and Agricultural Sciences, Universidad Nacional Toribio Rodriguez de Mendoza de Amazonas (UNTRM), Chachapoyas, AM, (01001), Peru
| | - Paula Andrade Pereira
- Department of Agriculture, Federal University of Lavras (UFLA), Lavras, MG, (37200-900), Brazil
| | - Danielle Rezende Vilela
- Department of Agriculture, Federal University of Lavras (UFLA), Lavras, MG, (37200-900), Brazil
| |
Collapse
|
8
|
Ivanov PA, Gasanova TV, Repina MN, Zamyatnin AA. Signaling and Resistosome Formation in Plant Innate Immunity to Viruses: Is There a Common Mechanism of Antiviral Resistance Conserved across Kingdoms? Int J Mol Sci 2023; 24:13625. [PMID: 37686431 PMCID: PMC10487714 DOI: 10.3390/ijms241713625] [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: 07/07/2023] [Revised: 08/16/2023] [Accepted: 08/31/2023] [Indexed: 09/10/2023] Open
Abstract
Virus-specific proteins, including coat proteins, movement proteins, replication proteins, and suppressors of RNA interference are capable of triggering the hypersensitive response (HR), which is a type of cell death in plants. The main cell death signaling pathway involves direct interaction of HR-inducing proteins with nucleotide-binding leucine-rich repeats (NLR) proteins encoded by plant resistance genes. Singleton NLR proteins act as both sensor and helper. In other cases, NLR proteins form an activation network leading to their oligomerization and formation of membrane-associated resistosomes, similar to metazoan inflammasomes and apoptosomes. In resistosomes, coiled-coil domains of NLR proteins form Ca2+ channels, while toll-like/interleukin-1 receptor-type (TIR) domains form oligomers that display NAD+ glycohydrolase (NADase) activity. This review is intended to highlight the current knowledge on plant innate antiviral defense signaling pathways in an attempt to define common features of antiviral resistance across the kingdoms of life.
Collapse
Affiliation(s)
- Peter A. Ivanov
- Faculty of Biology, Lomonosov Moscow State University, Moscow 119234, Russia; (P.A.I.); (T.V.G.); (M.N.R.)
| | - Tatiana V. Gasanova
- Faculty of Biology, Lomonosov Moscow State University, Moscow 119234, Russia; (P.A.I.); (T.V.G.); (M.N.R.)
| | - Maria N. Repina
- Faculty of Biology, Lomonosov Moscow State University, Moscow 119234, Russia; (P.A.I.); (T.V.G.); (M.N.R.)
| | - Andrey A. Zamyatnin
- Faculty of Bioengineering and Bioinformatics, Lomonosov Moscow State University, Moscow 119234, Russia
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow 119992, Russia
- Research Center for Translational Medicine, Sirius University of Science and Technology, Sirius 354340, Krasnodar Region, Russia
- Institute of Translational Medicine and Biotechnology, Sechenov First Moscow State Medical University, Moscow 119991, Russia
| |
Collapse
|
9
|
Sun Y, Li J, Wu H, Zhao Z, Cong T, Li L, Zhang X, Yin S, Xiao Z. GABA B Receptor Activation Attenuates Neuronal Pyroptosis in Post-cardiac Arrest Brain Injury. Neuroscience 2023; 526:97-106. [PMID: 37352966 DOI: 10.1016/j.neuroscience.2023.06.001] [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: 02/09/2023] [Revised: 05/30/2023] [Accepted: 06/02/2023] [Indexed: 06/25/2023]
Abstract
Brain injury is a major cause of death and disability after cardiac arrest (CA). Previous studies have shown that activating GABAB receptors significantly improves neurological function after CA, but the mechanism of this neuronal protection of damaged neurons remains unclear. Thus, the present study aimed to investigate whether GABAB receptor activation protects against neuronal injury and to reveal the underlying protective mechanisms. In this study, rats underwent 10 min of asphyxia to induce CA, and SH-SY5Y cells were subjected to oxygen and glucose deprivation/reoxygenation (OGD/R) to establish in vivo and in vitro models of hypoxic neuronal injury. Differential gene expression between CA rats and sham-operated rats was identified using RNA-seq. TUNEL and Nissl staining were used to evaluate cortical neuron damage, while Western blotting, qRT-PCR, and immunofluorescence assays were conducted to measure pyroptosis-related indicators. Furthermore, cellular models with high expression of caspase-11 were established to reveal the novel molecular mechanisms by which GABAB receptor activation exerts neuroprotective effects. Intriguingly, our results showed that caspase-11 and GSDMD were highly expressed in rats experiencing cardiac arrest. Specifically, GSDMD was expressed in neurons in the M1 area of the cerebral cortex. Moreover, activation of the GABAB receptor exerted a protective effect on neurons both in vivo and in vitro. Baclofen attenuated caspase-11 activation and neuronal pyroptosis after CA, and the anti-neuronal pyroptosis effect of baclofen was abolished by overexpression of caspase-11 in neuronal cells. In conclusion, GABAB receptor activation may play a neuroprotective role by alleviating neuronal pyroptosis through a mechanism involving caspase-11.
Collapse
Affiliation(s)
- Ye Sun
- Department of Anesthesiology, The Second Affiliated Hospital of Dalian Medical University, Dalian 116027, China
| | - Jinying Li
- Department of Anesthesiology, The Second Affiliated Hospital of Dalian Medical University, Dalian 116027, China
| | - Haikuo Wu
- Department of Anesthesiology, The Second Affiliated Hospital of Dalian Medical University, Dalian 116027, China
| | - Ziwei Zhao
- Department of Physiology, Basic Medicine College of Dalian Medical University, Dalian 116044, China
| | - Ting Cong
- Department of Anesthesiology, The Second Affiliated Hospital of Dalian Medical University, Dalian 116027, China
| | - Liya Li
- Department of Anesthesiology, The Second Affiliated Hospital of Dalian Medical University, Dalian 116027, China
| | - Xiaonan Zhang
- Department of Physiology, Basic Medicine College of Dalian Medical University, Dalian 116044, China
| | - Shengming Yin
- Department of Physiology, Basic Medicine College of Dalian Medical University, Dalian 116044, China.
| | - Zhaoyang Xiao
- Department of Anesthesiology, The Second Affiliated Hospital of Dalian Medical University, Dalian 116027, China.
| |
Collapse
|
10
|
Zhao ZC, Jiang MY, Huang JH, Lin C, Guo WL, Zhong ZH, Huang QQ, Liu SL, Deng HW, Zhou YC. Honokiol induces apoptosis-like death in Cryptocaryon irritans Tomont. Parasit Vectors 2023; 16:287. [PMID: 37587480 PMCID: PMC10428556 DOI: 10.1186/s13071-023-05910-1] [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: 05/26/2023] [Accepted: 07/31/2023] [Indexed: 08/18/2023] Open
Abstract
BACKGROUND Cryptocaryon irritans, a common parasite in tropical and subtropical marine teleost fish, has caused serious harm to the marine aquaculture industry. Honokiol was proven to induce C. irritans tomont cytoplasm shrinkage and death in our previous study, but the mechanism by which it works remains unknown. METHODS In this study, the changes of apoptotic morphology and apoptotic ratio were detected by microscopic observation and AnnexinV-FITC/PI staining. The effects of honokiol on intracellular calcium ([Ca2+]i) concentration, mitochondrial membrane potential (ΔΨm), reactive oxygen species (ROS), quantity of DNA fragmentations (QDF) and caspase activities were detected by Fluo-3 staining, JC-1 staining, DCFH-DA staining, Tunel method and caspase activity assay kit. The effects of honokiol on mRNA expression levels of 61 apoptosis-related genes in tomonts of C. irritans were detected by real-time PCR. RESULTS The results of the study on the effects of honokiol concentration on C. irritans tomont apoptosis-like death showed that the highest levels of prophase apoptosis-like death rate (PADR), [Ca2+]i concentration, ROS, the activities of caspase-3/9 and the lowest necrosis ratio (NER) were obtained at a concentration of 1 μg/ml, which was considered the most suitable for inducing C. irritans tomont apoptosis-like death. When C. irritans tomonts were treated with 1 μg/ml honokiol, the [Ca2+]i concentration began to increase significantly at 1 h. Following this, the ROS, QDF and activities of caspase-3/9 began to increase significantly, and the ΔΨm began to decrease significantly at 2 h; the highest PADR was obtained at 4 h. The mRNA expression of 14 genes was significantly upregulated during honokiol treatment. Of these genes, itpr2, capn1, mc, actg1, actb, parp2, traf2 and fos were enriched in the pathway related to apoptosis induced by endoplasmic reticulum (ER) stress. CONCLUSIONS This article shows that honokiol can induce C. irritans tomont apoptosis-like death. These results suggest that honokiol may disrupt [Ca2+]i homeostasis in ER and then induce C. irritans tomont apoptosis-like death by caspase cascade or mitochondrial pathway, which might represent a novel therapeutic intervention for C. irritans infection.
Collapse
Affiliation(s)
- Zi-Chen Zhao
- Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, College of Marine Science, Hainan University, Haikou, 570228, People's Republic of China
- School of Life Sciences, Hainan University, Haikou, 570228, People's Republic of China
| | - Man-Yi Jiang
- Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, College of Marine Science, Hainan University, Haikou, 570228, People's Republic of China
| | - Ji-Hui Huang
- Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, College of Marine Science, Hainan University, Haikou, 570228, People's Republic of China
- Technology Center of Haikou Customs District, Haikou, 570105, People's Republic of China
| | - Chuan Lin
- Aquaculture Department, Hainan Agriculture School, Haikou, 571101, People's Republic of China
| | - Wei-Liang Guo
- Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, College of Marine Science, Hainan University, Haikou, 570228, People's Republic of China.
| | - Zhi-Hong Zhong
- Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, College of Marine Science, Hainan University, Haikou, 570228, People's Republic of China
| | - Qing-Qin Huang
- Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, College of Marine Science, Hainan University, Haikou, 570228, People's Republic of China
| | - Shao-Long Liu
- Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, College of Marine Science, Hainan University, Haikou, 570228, People's Republic of China
| | - Heng-Wei Deng
- Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, College of Marine Science, Hainan University, Haikou, 570228, People's Republic of China
| | - Yong-Can Zhou
- Hainan Provincial Key Laboratory for Tropical Hydrobiology and Biotechnology, College of Marine Science, Hainan University, Haikou, 570228, People's Republic of China.
| |
Collapse
|
11
|
Wleklik K, Borek S. Vacuolar Processing Enzymes in Plant Programmed Cell Death and Autophagy. Int J Mol Sci 2023; 24:ijms24021198. [PMID: 36674706 PMCID: PMC9862320 DOI: 10.3390/ijms24021198] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/02/2023] [Accepted: 01/05/2023] [Indexed: 01/11/2023] Open
Abstract
Vacuolar processing enzymes (VPEs) are plant cysteine proteases that are subjected to autoactivation in an acidic pH. It is presumed that VPEs, by activating other vacuolar hydrolases, are in control of tonoplast rupture during programmed cell death (PCD). Involvement of VPEs has been indicated in various types of plant PCD related to development, senescence, and environmental stress responses. Another pathway induced during such processes is autophagy, which leads to the degradation of cellular components and metabolite salvage, and it is presumed that VPEs may be involved in the degradation of autophagic bodies during plant autophagy. As both PCD and autophagy occur under similar conditions, research on the relationship between them is needed, and VPEs, as key vacuolar proteases, seem to be an important factor to consider. They may even constitute a potential point of crosstalk between cell death and autophagy in plant cells. This review describes new insights into the role of VPEs in plant PCD, with an emphasis on evidence and hypotheses on the interconnections between autophagy and cell death, and indicates several new research opportunities.
Collapse
|
12
|
Garcia N, Kalicharan RE, Kinch L, Fernandez J. Regulating Death and Disease: Exploring the Roles of Metacaspases in Plants and Fungi. Int J Mol Sci 2022; 24:ijms24010312. [PMID: 36613753 PMCID: PMC9820594 DOI: 10.3390/ijms24010312] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 12/20/2022] [Accepted: 12/22/2022] [Indexed: 12/28/2022] Open
Abstract
Identified over twenty years ago and distantly related to animal caspases are a group of cysteine proteases known as metacaspases. Throughout the years, much like caspase roles in metazoans, metacaspases have been shown to be involved in regulating cellular death in non-metazoan organisms. Yet, continued research on metacaspases describes these proteins as intricate and multifunctional, displaying striking diversity on distinct biological functions. In this review, we intend to describe the recent advances in our understanding of the divergence of metacaspase functionality in plants and fungi. We will dissect the duality of metacaspase activity in the context of plant-pathogen interactions, providing a unique lens from which to characterize metacaspases in the development, immunity, and stress responses of plants, and the development and virulence of fungi. Furthermore, we explore the evolutionary trajectory of fungal metacaspases to delineate their structure and function. Bridging the gap between metacaspase roles in immunity and pathogenicity of plant-pathogen interactions can enable more effective and targeted phytopathogen control efforts to increase production of globally important food crops. Therefore, the exploitation and manipulation of metacaspases in plants or fungi represent new potential avenues for developing mitigation strategies against plant pathogens.
Collapse
Affiliation(s)
- Nalleli Garcia
- Department of Microbiology and Cell Science, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611, USA
| | - Rachel E. Kalicharan
- Department of Microbiology and Cell Science, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611, USA
| | - Lisa Kinch
- Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Jessie Fernandez
- Department of Microbiology and Cell Science, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL 32611, USA
- Correspondence:
| |
Collapse
|