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Dos Santos BM, Pecenin MF, Borges-Pereira L, Springer E, Przyborski JM, Martins-Jr DC, Hashimoto RF, Garcia CRS. The genetically encoded calcium indicator GCaMP3 reveals spontaneous calcium oscillations at asexual stages of the human malaria parasite Plasmodium falciparum. Mol Biochem Parasitol 2024; 260:111650. [PMID: 39151473 DOI: 10.1016/j.molbiopara.2024.111650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 08/02/2024] [Accepted: 08/13/2024] [Indexed: 08/19/2024]
Abstract
Most protocols used to study the dynamics of calcium (Ca2+) in the malaria parasite are based on dyes, which are invasive and do not allow discrimination between the signal from the host cell and the parasite. To avoid this pitfall, we have generated a parasite line expressing the genetically encoded calcium sensor GCaMP3. The PfGCaMP3 parasite line is an innovative tool for studying spontaneous intracellular Ca2+ oscillations without external markers. Using this parasite line, we demonstrate the occurrence of spontaneous Ca2+ oscillations in the ring, trophozoite, and schizont stages in Plasmodium falciparum. Using the Fourier transform to fluorescence intensity data extracted from different experiments, we observe cytosolic Ca2+ fluctuations. These spontaneous cytosolic Ca2+ oscillations occur in the three intraerythrocytic stages of the parasite, with most oscillations occurring in the ring and trophozoite stages. A control parasite line expressing only a GFP control did not reveal such fluctuations, demonstrating the specificity of the observations. Our results clearly show dynamic, spontaneous Ca2+ oscillations during the asexual stage in P. falciparum, independent from external stimuli.
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Affiliation(s)
- Benedito M Dos Santos
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo, São Paulo 05508-000, Brazil
| | - Mateus F Pecenin
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo, São Paulo 05508-000, Brazil
| | - Lucas Borges-Pereira
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo, São Paulo 05508-000, Brazil
| | - Eric Springer
- Department of Biochemistry and Molecular Biology, Interdisciplinary Research Center, Justus-Liebig University, Gießen 35390, Germany
| | - Jude M Przyborski
- Department of Biochemistry and Molecular Biology, Interdisciplinary Research Center, Justus-Liebig University, Gießen 35390, Germany
| | - David C Martins-Jr
- Center of Mathematics, Computing and Cognition, Federal University of ABC, Santo André 09606-045, Brazil
| | - Ronaldo F Hashimoto
- Institute of Mathematics and Statistics, University of São Paulo, São Paulo 05508-000, Brazil
| | - Célia R S Garcia
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo, São Paulo 05508-000, Brazil.
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Ichimura T, Kakizuka T, Sato Y, Fujioka Y, Ohba Y, Horikawa K, Nagai T. Strength in numbers: Unleashing the potential of trans-scale scope AMATERAS for massive cell quantification. Biophys Physicobiol 2024; 21:e211017. [PMID: 39175860 PMCID: PMC11338690 DOI: 10.2142/biophysico.bppb-v21.s017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Accepted: 03/22/2024] [Indexed: 08/24/2024] Open
Abstract
Singularity biology is a scientific field that targets drastic state changes in multicellular systems, aiming to discover the key cells that induce the state change and investigate the mechanisms behind them. To achieve this goal, we developed a trans-scale optical imaging system (trans-scale scope), that is capable of capturing both macroscale changes across the entire system and the micro-scale behavior of individual cells, surpassing the cell observation capabilities of traditional microscopes. We developed two units of the trans-scale scope, named AMATERAS-1 and -2, which demonstrated the ability to observe multicellular systems consisting of over one million cells in a single field of view with sub-cellular resolution. This flagship instrument has been used to observe the dynamics of various cell species, with the advantage of being able to observe a large number of cells, allowing the detection and analysis of rare events and cells such as leader cells in multicellular pattern formation and cells that spontaneously initiate calcium waves. In this paper, we present the design concept of AMATERAS, the optical configuration, and several examples of observations, and demonstrate how the strength-in-numbers works in life sciences.
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Affiliation(s)
- Taro Ichimura
- Transdimensional Life Imaging Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Suita, Osaka 565-0871, Japan
| | - Taishi Kakizuka
- Department of Biomolecular Science and Engineering, SANKEN, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Yuki Sato
- Department of Anatomy and Cell Biology, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka 812-8582, Japan
| | - Yoichiro Fujioka
- Department of Cell Physiology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido 060-8638, Japan
| | - Yusuke Ohba
- Department of Cell Physiology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Hokkaido 060-8638, Japan
| | - Kazuki Horikawa
- Department of Optical Imaging, Advanced Research Promotion Center, Tokushima University, Tokushima 770-8503, Japan
| | - Takeharu Nagai
- Transdimensional Life Imaging Division, Institute for Open and Transdisciplinary Research Initiatives, Osaka University, Suita, Osaka 565-0871, Japan
- Department of Biomolecular Science and Engineering, SANKEN, Osaka University, Ibaraki, Osaka 567-0047, Japan
- Research Institute for Electronic Science, Hokkaido University, Sapporo, Hokkaido 001-0020, Japan
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Peussa H, Fedele C, Tran H, Marttinen M, Fadjukov J, Mäntylä E, Priimägi A, Nymark S, Ihalainen TO. Light-Induced Nanoscale Deformation in Azobenzene Thin Film Triggers Rapid Intracellular Ca 2+ Increase via Mechanosensitive Cation Channels. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2206190. [PMID: 37946608 PMCID: PMC10724422 DOI: 10.1002/advs.202206190] [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: 10/24/2022] [Revised: 09/15/2023] [Indexed: 11/12/2023]
Abstract
Epithelial cells are in continuous dynamic biochemical and physical interaction with their extracellular environment. Ultimately, this interplay guides fundamental physiological processes. In these interactions, cells generate fast local and global transients of Ca2+ ions, which act as key intracellular messengers. However, the mechanical triggers initiating these responses have remained unclear. Light-responsive materials offer intriguing possibilities to dynamically modify the physical niche of the cells. Here, a light-sensitive azobenzene-based glassy material that can be micropatterned with visible light to undergo spatiotemporally controlled deformations is used. Real-time monitoring of consequential rapid intracellular Ca2+ signals reveals that the mechanosensitive cation channel Piezo1 has a major role in generating the Ca2+ transients after nanoscale mechanical deformation of the cell culture substrate. Furthermore, the studies indicate that Piezo1 preferably responds to shear deformation at the cell-material interphase rather than to absolute topographical change of the substrate. Finally, the experimentally verified computational model suggests that Na+ entering alongside Ca2+ through the mechanosensitive cation channels modulates the duration of Ca2+ transients, influencing differently the directly stimulated cells and their neighbors. This highlights the complexity of mechanical signaling in multicellular systems. These results give mechanistic understanding on how cells respond to rapid nanoscale material dynamics and deformations.
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Affiliation(s)
- Heidi Peussa
- BioMediTechFaculty of Medicine and Health TechnologyTampere UniversityArvo Ylpön katu 34Tampere33520Finland
| | - Chiara Fedele
- Faculty of Engineering and Natural SciencesTampere UniversityKorkeakoulunkatu 3Tampere33720Finland
| | - Huy Tran
- BioMediTechFaculty of Medicine and Health TechnologyTampere UniversityArvo Ylpön katu 34Tampere33520Finland
| | - Mikael Marttinen
- BioMediTechFaculty of Medicine and Health TechnologyTampere UniversityArvo Ylpön katu 34Tampere33520Finland
| | - Julia Fadjukov
- BioMediTechFaculty of Medicine and Health TechnologyTampere UniversityArvo Ylpön katu 34Tampere33520Finland
| | - Elina Mäntylä
- BioMediTechFaculty of Medicine and Health TechnologyTampere UniversityArvo Ylpön katu 34Tampere33520Finland
| | - Arri Priimägi
- Faculty of Engineering and Natural SciencesTampere UniversityKorkeakoulunkatu 3Tampere33720Finland
| | - Soile Nymark
- BioMediTechFaculty of Medicine and Health TechnologyTampere UniversityArvo Ylpön katu 34Tampere33520Finland
| | - Teemu O. Ihalainen
- BioMediTechFaculty of Medicine and Health TechnologyTampere UniversityArvo Ylpön katu 34Tampere33520Finland
- Tampere Institute for Advanced StudyTampere UniversityArvo Ylpön katu 34Tampere33520Finland
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Tseng MC, Lim J, Chu YC, Chen CW, Feng CK, Wang JL. Dynamic Pressure Stimulation Upregulates Collagen II and Aggrecan in Nucleus Pulposus Cells Through Calcium Signaling. Spine (Phila Pa 1976) 2022; 47:1111-1119. [PMID: 34812197 DOI: 10.1097/brs.0000000000004286] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 10/25/2021] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN An in vitro study to investigate the effect of pressure stimulation on nucleus pulposus (NP) cells. OBJECTIVE The aim of this study was to investigate the question whether physical stimulation can be leveraged to enhance extracellular matrix (ECM) synthesis as a preventive measure for intervertebral disc (IVD) degeneration. SUMMARY OF BACKGROUND DATA ECM plays an important role in regulating hydration and pressure balance of the IVD. METHODS Cellular stimulation devices with different pressurizing protocols were used to create a pressurized environment to cells cultures. The setup was used to mimic the pressurized conditions within IVD to investigate the effect of pressure stimulation on NP cells. RESULTS Pressure stimulation at 300 kPa can enhance the synthesis of ECM proteins Collagen II and aggrecan in NP cells and the effect of dynamic pressure stimulation outperformed the static one. The difference between static and dynamic pressure stimulation was due primarily to calcium signaling activated by pressure fluctuation. The superior effect of dynamic pressure holds for a wide range of stimulation durations, relating to the range of spontaneous calcium oscillations in NP cells. CONCLUSION The results link mechanotransduction to the downstream ECM protein synthesis and suggest slow exercises that correspond with spontaneous calcium oscillations in NP cells can be effective to stimulate ECM synthesis in IVD.
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Affiliation(s)
- Mu-Cyun Tseng
- Department of Biomedical Engineering, National Taiwan University, Taipei, Taiwan, ROC
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Wang DL, Dai WY, Wang W, Wen Y, Zhou Y, Zhao YT, Wu J, Liu P. Interfering RNA against PKC-α inhibits TNF-α-induced IP 3R1 expression and improves glomerular filtration rate in rats with fulminant hepatic failure. Am J Physiol Renal Physiol 2018; 314:F942-F955. [PMID: 29357415 DOI: 10.1152/ajprenal.00433.2016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
We have reported that tumor necrosis factor-α (TNF-α) is critical for reduction of glomerular filtration rate (GFR) in rats with fulminant hepatic failure (FHF). The present study aims to evaluate the underlying mechanisms of decreased GFR during acute hepatic failure. Rats with FHF induced by d-galactosamine plus lipopolysaccharide (GalN/LPS) were injected intravenously with recombinant lentivirus harboring short hairpin RNA against the protein kinase C-α ( PKC-α) gene (Lenti-shRNA-PKC-α). GFR, serum levels of aminotransferases, creatinine, urea nitrogen, potassium, sodium, chloride, TNF-α, and endothelin-1 (ET-1), as well as type 1 inositol 1,4,5-trisphosphate receptor (IP3R1) expression in renal tissue were assessed. The effects of PKC-α silencing on TNF-α-induced IP3R1, specificity protein 1 (SP-1), and c-Jun NH2-terminal kinase (JNK) expression, as well as cytosolic calcium content were determined in glomerular mesangial cell (GMCs) with RNAi against PKC-α. Renal IP3R1 overexpression was abrogated by pre-treatment with Lenti-shRNA-PKC-α. The PKC-α silence significantly improved the compromised GFR, reduced Cr levels, and reversed the decrease in glomerular inulin space and the increase in glomerular calcium content in GalN/LPS-exposed rats. TNF-α treatment increased expression of PKC-α, IP3R1, specificity protein 1 (SP-1), JNK, and p-JNK in GMCs and increased Ca2 + release and binding activity of SP-1 to the IP3R1 promoter. These effects were blocked by transfection of siRNA against the PKC-α gene, and the PKC-α gene silence also restored cytosolic Ca2+ concentration. RNAi targeting PKC-α inhibited TNF-α-induced IP3R1 overexpression and in turn improved compromised GFR in the development of acute kidney injury during FHF in rats.
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Affiliation(s)
- Dong-Lei Wang
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, Liaoning Province, People's Republic of China
| | - Wen-Ying Dai
- The Sixth People's Hospital of Shenyang, Shenyang City, Liaoning Province, People's Republic of China
| | - Wen Wang
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, Liaoning Province, People's Republic of China
| | - Ying Wen
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, Liaoning Province, People's Republic of China
| | - Ying Zhou
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, Liaoning Province, People's Republic of China
| | - Yi-Tong Zhao
- The Sixth People's Hospital of Shenyang, Shenyang City, Liaoning Province, People's Republic of China
| | - Jian Wu
- Department of Medical Microbiology, Key Laboratory of Medical Molecular Virology, School of Basic Medical Sciences, Fudan University , Shanghai , China.,Shanghai Institute of Liver Diseases, Fudan University , Shanghai , China
| | - Pei Liu
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, Liaoning Province, People's Republic of China.,The Institute of liver diseases, China Medical University, Shenyang, Liaoning Province, China
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Wang JB, Wang DL, Wang HT, Wang ZH, Wen Y, Sun CM, Zhao YT, Wu J, Liu P. Tumor necrosis factor-alpha-induced reduction of glomerular filtration rate in rats with fulminant hepatic failure. J Transl Med 2014; 94:740-51. [PMID: 24887412 DOI: 10.1038/labinvest.2014.71] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Revised: 04/11/2014] [Accepted: 04/20/2014] [Indexed: 12/16/2022] Open
Abstract
The mechanism of renal failure during fulminant hepatic failure (FHF) or end-stage of liver disease is not fully understood. The present study aims to delineate the mechanisms of decreased glomerular filtration rate (GFR) in acute hepatic failure. A rat model of renal insufficiency in severe liver injury was established by lipopolysaccharide (LPS) plus D-galactosamine (GalN) exposure. GFR was evaluated by continuous infusion of fluorescein isothiocyanate-inulin with implanted micro-osmotic pumps. GalN/LPS intoxication resulted in severe hepatocyte toxicity as evidenced by liver histology and biochemical tests, whereas renal morphology remained normal. GFR was reduced by 33% of the controls 12 h after GalN/LPS exposure, accompanied with a decreased serum sodium levels, a marked increase in serum TNF-α and ET-1 levels as well as significantly upregulated renal type 1 inositol 1,4,5-trisphosphate receptor (IP3R1) expression. The upregulated IP3R1 expression was abrogated by the treatment of anti-TNF-α antibodies, but not by 2-aminoethoxydiphenylborate (2-APB), which blocks the inositol 1,4,5-trisphosphate signaling pathway. Treatments with either TNF-α antibodies or 2-APB also significantly improved the compromised GFR, elevated serum urea nitrogen and creatinine levels, and reversed the decrease in glomerular inulin space and the increase in glomerular calcium content in GalN/LPS-exposed rats. The extent of acute liver injury as reflected by serum ALT levels was much more attenuated by anti-TNF-α antibodies than by 2-APB. Liver histology further confirmed that anti-TNF-α antibodies conferred better protection than 2-APB in GalN/LPS-exposed rats. LPS-elicited TNF-α over-production is responsible for decreased GFR through IP3R1 overexpression, and the compromised GFR resulted in the development of acute renal failure in rats with FHF.
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Affiliation(s)
- Jing-Bo Wang
- 1] Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, People's Republic of China [2] Division of Gastroenterology, Department of Internal Medicine, The Sixth People's Hospital of Shenyang, Shenyang City, People's Republic of China
| | - Dong-Lei Wang
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, People's Republic of China
| | - Hai-Tao Wang
- Division of Hepatobiliary Diseases, Department of Surgery, The Affiliated Shenzhou Hospital of Shenyang Medical College, Shenyang City, People's Republic of China
| | - Zhao-Han Wang
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, People's Republic of China
| | - Ying Wen
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, People's Republic of China
| | - Cui-Ming Sun
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, People's Republic of China
| | - Yi-Tong Zhao
- Division of Gastroenterology, Department of Internal Medicine, The Sixth People's Hospital of Shenyang, Shenyang City, People's Republic of China
| | - Jian Wu
- 1] Department of Internal Medicine, Division of Gastroenterology and Hepatology, University of California, Davis Medical Center, Sacramento, CA, USA [2] Key Laboratory of Molecular Virology, Fudan University College of Basic Medical Sciences, Shanghai, People's Republic of China
| | - Pei Liu
- Department of Infectious Diseases, The First Affiliated Hospital, China Medical University, Shenyang City, People's Republic of China
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Burnstock G, Evans LC, Bailey MA. Purinergic signalling in the kidney in health and disease. Purinergic Signal 2014; 10:71-101. [PMID: 24265071 PMCID: PMC3944043 DOI: 10.1007/s11302-013-9400-5] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Accepted: 10/24/2013] [Indexed: 12/21/2022] Open
Abstract
The involvement of purinergic signalling in kidney physiology and pathophysiology is rapidly gaining recognition and this is a comprehensive review of early and recent publications in the field. Purinergic signalling involvement is described in several important intrarenal regulatory mechanisms, including tuboglomerular feedback, the autoregulatory response of the glomerular and extraglomerular microcirculation and the control of renin release. Furthermore, purinergic signalling influences water and electrolyte transport in all segments of the renal tubule. Reports about purine- and pyrimidine-mediated actions in diseases of the kidney, including polycystic kidney disease, nephritis, diabetes, hypertension and nephrotoxicant injury are covered and possible purinergic therapeutic strategies discussed.
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Affiliation(s)
- Geoffrey Burnstock
- Autonomic Neuroscience Centre, University College Medical School, Rowland Hill Street, London, NW3 2PF, UK,
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