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Evinova A, Baranovicova E, Hajduchova D, Dibdiakova K, Baranova I, Racay P, Strnadel J, Pecova R, Halasova E, Pokusa M. The impact of ATP-sensitive potassium channel modulation on mitochondria in a Parkinson's disease model using SH-SY5Y cells depends on their differentiation state. J Bioenerg Biomembr 2024:10.1007/s10863-024-10018-x. [PMID: 38689156 DOI: 10.1007/s10863-024-10018-x] [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: 02/02/2024] [Accepted: 04/18/2024] [Indexed: 05/02/2024]
Abstract
Inward rectifying potassium channels sensitive to ATP levels (KATP) have been the subject of investigation for several decades. Modulators of KATP channels are well-established treatments for metabolic as well as cardiovascular diseases. Experimental studies have also shown the potential of KATP modulation in neurodegenerative disorders. However, to date, data regarding the effects of KATP antagonists/agonists in experiments related to neurodegeneration remain inconsistent. The main source of confusion in evaluating available data seems to be the choice of experimental models. The present study aims to provide a comprehensive understanding of the effects of both opening and blocking KATP channels in two forms of SH-SY5Y cells. Our results offer valuable insights into the significance of metabolic differences between differentiated and non-differentiated SH-SY5Y cells, particularly in the context of glibenclamide and diazoxide effects under normal conditions and during the initiation of pathological events simulating Parkinson's disease in vitro. We emphasize the analysis of mitochondrial functions and changes in mitochondrial network morphology. The heightened protein expression of KATP channels identified in non-differentiated SH-SY5Y cells seems to be a platform for a more significant impact of KATP modulators in this cell type. The efficiency of rotenone treatment in inducing morphological changes in the mitochondrial network depends on the differentiation status of SH-SY5Y cells.
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Affiliation(s)
- A Evinova
- Biomedical Centre Martin, Jessenius Faculty of Medicine, Comenius University, Bratislava, Slovakia
| | - E Baranovicova
- Biomedical Centre Martin, Jessenius Faculty of Medicine, Comenius University, Bratislava, Slovakia
| | - D Hajduchova
- Department of Pathological Physiology, Jessenius Faculty of Medicine, Comenius University, Bratislava, Slovakia
| | - K Dibdiakova
- Department of Pathological Physiology, Jessenius Faculty of Medicine, Comenius University, Bratislava, Slovakia
| | - I Baranova
- Department of Pathological Physiology, Jessenius Faculty of Medicine, Comenius University, Bratislava, Slovakia
| | - P Racay
- Department of Medical Biochemistry, Jessenius Faculty of Medicine, Comenius University, Bratislava, Slovakia
| | - J Strnadel
- Biomedical Centre Martin, Jessenius Faculty of Medicine, Comenius University, Bratislava, Slovakia
| | - R Pecova
- Department of Pathological Physiology, Jessenius Faculty of Medicine, Comenius University, Bratislava, Slovakia
| | - E Halasova
- Biomedical Centre Martin, Jessenius Faculty of Medicine, Comenius University, Bratislava, Slovakia
| | - M Pokusa
- Biomedical Centre Martin, Jessenius Faculty of Medicine, Comenius University, Bratislava, Slovakia.
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Mukherjee M, Mukherjee C, Ghosh V, Jain A, Sadhukhan S, Dagar S, Sahu BS. Endoplasmic reticulum stress impedes regulated secretion by governing key exocytotic and granulogenic molecular switches. J Cell Sci 2024; 137:jcs261257. [PMID: 38348894 DOI: 10.1242/jcs.261257] [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: 04/19/2023] [Accepted: 02/05/2024] [Indexed: 03/20/2024] Open
Abstract
Dense core vesicles (DCVs) and synaptic vesicles are specialised secretory vesicles in neurons and neuroendocrine cells, and abnormal release of their cargo is associated with various pathophysiologies. Endoplasmic reticulum (ER) stress and inter-organellar communication are also associated with disease biology. To investigate the functional status of regulated exocytosis arising from the crosstalk of a stressed ER and DCVs, ER stress was modelled in PC12 neuroendocrine cells using thapsigargin. DCV exocytosis was severely compromised in ER-stressed PC12 cells and was reversed to varying magnitudes by ER stress attenuators. Experiments with tunicamycin, an independent ER stressor, yielded similar results. Concurrently, ER stress also caused impaired DCV exocytosis in insulin-secreting INS-1 cells. Molecular analysis revealed blunted SNAP25 expression, potentially attributed to augmented levels of ATF4, an inhibitor of CREB that binds to the CREB-binding site. The effects of loss of function of ATF4 in ER-stressed cells substantiated this attribution. Our studies revealed severe defects in DCV exocytosis in ER-stressed cells for the first time, mediated by reduced levels of key exocytotic and granulogenic switches regulated via the eIF2α (EIF2A)-ATF4 axis.
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Affiliation(s)
- Mohima Mukherjee
- National Brain Research Centre, Manesar, Gurgaon, Haryana 122052, India
| | | | - Vinayak Ghosh
- National Brain Research Centre, Manesar, Gurgaon, Haryana 122052, India
| | - Aamna Jain
- National Brain Research Centre, Manesar, Gurgaon, Haryana 122052, India
| | - Souren Sadhukhan
- National Brain Research Centre, Manesar, Gurgaon, Haryana 122052, India
| | - Sushma Dagar
- National Brain Research Centre, Manesar, Gurgaon, Haryana 122052, India
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Hatokova Z, Evinova A, Racay P. STF-083010 an inhibitor of IRE1α endonuclease activity affects mitochondrial respiration and generation of mitochondrial membrane potential. Toxicol In Vitro 2023; 92:105652. [PMID: 37482139 DOI: 10.1016/j.tiv.2023.105652] [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: 03/05/2023] [Revised: 06/18/2023] [Accepted: 07/21/2023] [Indexed: 07/25/2023]
Abstract
STF-083010 is an inhibitor of endonuclease activity of inositol requiring-enzyme 1α (IRE1α) that is involved in activation of IRE1α-XBP1 axis of the unfolded protein response after ER stress. STF-083010 was tested as a possible antitumor agent in some previous studies exhibiting the ability either to induce death of tumour cells or to increase sensitivity of tumours cells to other neoplastic agents. STF-083010 exhibits also hepatoprotective effects in different models of liver injury and hepatic steatohepatitis. We have shown that STF-083010 has significant impact on mitochondrial functions that is not dependent on the way of STF-083010 application. We have observed that STF-083010 decrease of both maximal respiration (representing maximal electron transfer capacity of mitochondrial respiratory chain) and spare respiratory capacity after either incubation of the SH-SY5Y cells with STF-083010 or direct addition of STF-083010 to the respiration medium. In addition, we have documented impact of STF-083010 on generation of mitochondrial membrane potential (ΔΨm) that could be a result of decreased mitochondrial substrate level phosphorylation. Finally, increased sensitivity of ΔΨm to uncoupler in the presence of STF-083010 was documented. Our results indicate that STF-083010 has important impact on mitochondrial functions independently of its ability to inhibit endonuclease activity of IRE1α that is involved in activation of IRE1α-XBP1 axis of the unfolded protein response after ER stress. The impact of STF-083010 on mitochondrial functions could be associated with its possible off-target effect.
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Affiliation(s)
- Zuzana Hatokova
- Biomedical Center Martin, Comenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Slovak Republic
| | - Andrea Evinova
- Biomedical Center Martin, Comenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Slovak Republic
| | - Peter Racay
- Department of Medical Biochemistry JFM CU, JFM CU Martin, Comenius University in Bratislava, Jessenius Faculty of Medicine in Martin (JFM CU), Slovak Republic.
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Talati MN, Vemireddy S, Seelam SD, Halmuthur. M. SK. Synthesis and immunomodulatory activity of novel amino acid analogues of fluoxetine. SYNTHETIC COMMUN 2023. [DOI: 10.1080/00397911.2023.2196024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
Affiliation(s)
- Mamta N. Talati
- OSPC Division, Vaccine Immunology Laboratory, CSIR-Indian Institute of Chemical Technology, Hyderabad, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
| | - Sravanthi Vemireddy
- OSPC Division, Vaccine Immunology Laboratory, CSIR-Indian Institute of Chemical Technology, Hyderabad, India
| | - Siva Deepthi Seelam
- OSPC Division, Vaccine Immunology Laboratory, CSIR-Indian Institute of Chemical Technology, Hyderabad, India
| | - Sampath Kumar Halmuthur. M.
- OSPC Division, Vaccine Immunology Laboratory, CSIR-Indian Institute of Chemical Technology, Hyderabad, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, India
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Asensi-Cantó A, López-Abellán MD, Castillo-Guardiola V, Hurtado AM, Martínez-Penella M, Luengo-Gil G, Conesa-Zamora P. Antitumoral Effects of Tricyclic Antidepressants: Beyond Neuropathic Pain Treatment. Cancers (Basel) 2022; 14:cancers14133248. [PMID: 35805019 PMCID: PMC9265090 DOI: 10.3390/cancers14133248] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 06/26/2022] [Accepted: 06/28/2022] [Indexed: 11/25/2022] Open
Abstract
Simple Summary Tricyclic antidepressants (TCAs) are old and known therapeutic agents whose good safety profile makes them good candidates for drug repurposing. As the relevance of nerves in cancer development and progression is being unveiled, attention now turns to the use of nerve-targeting drugs, such as TCAs, as an interesting approach to combat cancer. In this review, we discuss current evidence about the safety of TCAs, their application to treat neuropathic pain in cancer patients, and in vitro and in vivo demonstrations of the antitumoral effects of TCAs. Finally, the results of ongoing clinical trials and future directions are discussed. Abstract Growing evidence shows that nerves play an active role in cancer development and progression by altering crucial molecular pathways and cell functions. Conversely, the use of neurotropic drugs, such as tricyclic antidepressants (TCAs), may modulate these molecular signals with a therapeutic purpose based on a direct antitumoral effect and beyond the TCA use to treat neuropathic pain in oncology patients. In this review, we discuss the TCAs’ safety and their central effects against neuropathic pain in cancer, and the antitumoral effects of TCAs in in vitro and preclinical studies, as well as in the clinical setting. The current evidence points out that TCAs are safe and beneficial to treat neuropathic pain associated with cancer and chemotherapy, and they block different molecular pathways used by cancer cells from different locations for tumor growth and promotion. Likewise, ongoing clinical trials evaluating the antineoplastic effects of TCAs are discussed. TCAs are very biologically active compounds, and their repurposing as antitumoral drugs is a promising and straightforward approach to treat specific cancer subtypes and to further define their molecular targets, as well as an interesting starting point to design analogues with increased antitumoral activity.
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Affiliation(s)
- Antonio Asensi-Cantó
- Facultad de Ciencias de la Salud, Universidad Católica de Murcia (UCAM), 30107 Guadalupe, Spain; (A.A.-C.); (M.D.L.-A.); (M.M.-P.)
- Servicio de Farmacia Hospitalaria, Hospital Universitario Santa Lucía, 30202 Cartagena, Spain
- Grupo de Investigación en Patología Molecular y Farmacogenética, Servicios de Anatomía Patológica y Análisis Clínicos, Instituto Murciano de Investigación Biosanitaria (IMIB), Hospital Universitario Santa Lucía, 30202 Cartagena, Spain; (V.C.-G.); (A.M.H.)
| | - María Dolores López-Abellán
- Facultad de Ciencias de la Salud, Universidad Católica de Murcia (UCAM), 30107 Guadalupe, Spain; (A.A.-C.); (M.D.L.-A.); (M.M.-P.)
- Grupo de Investigación en Patología Molecular y Farmacogenética, Servicios de Anatomía Patológica y Análisis Clínicos, Instituto Murciano de Investigación Biosanitaria (IMIB), Hospital Universitario Santa Lucía, 30202 Cartagena, Spain; (V.C.-G.); (A.M.H.)
| | - Verónica Castillo-Guardiola
- Grupo de Investigación en Patología Molecular y Farmacogenética, Servicios de Anatomía Patológica y Análisis Clínicos, Instituto Murciano de Investigación Biosanitaria (IMIB), Hospital Universitario Santa Lucía, 30202 Cartagena, Spain; (V.C.-G.); (A.M.H.)
| | - Ana María Hurtado
- Grupo de Investigación en Patología Molecular y Farmacogenética, Servicios de Anatomía Patológica y Análisis Clínicos, Instituto Murciano de Investigación Biosanitaria (IMIB), Hospital Universitario Santa Lucía, 30202 Cartagena, Spain; (V.C.-G.); (A.M.H.)
- Grupo de Investigación en Inmunobiología para la Acuicultura, Departamento de Biología Celular e Histología, Facultad de Biología, Universidad de Murcia, 30100 Murcia, Spain
| | - Mónica Martínez-Penella
- Facultad de Ciencias de la Salud, Universidad Católica de Murcia (UCAM), 30107 Guadalupe, Spain; (A.A.-C.); (M.D.L.-A.); (M.M.-P.)
- Servicio de Farmacia Hospitalaria, Hospital Universitario Santa Lucía, 30202 Cartagena, Spain
| | - Ginés Luengo-Gil
- Grupo de Investigación en Patología Molecular y Farmacogenética, Servicios de Anatomía Patológica y Análisis Clínicos, Instituto Murciano de Investigación Biosanitaria (IMIB), Hospital Universitario Santa Lucía, 30202 Cartagena, Spain; (V.C.-G.); (A.M.H.)
- Correspondence: (G.L.-G.); (P.C.-Z.); Tel.: +34-968-128-600 (ext. 951615) (G.L.-G. & P.C.-Z.)
| | - Pablo Conesa-Zamora
- Facultad de Ciencias de la Salud, Universidad Católica de Murcia (UCAM), 30107 Guadalupe, Spain; (A.A.-C.); (M.D.L.-A.); (M.M.-P.)
- Grupo de Investigación en Patología Molecular y Farmacogenética, Servicios de Anatomía Patológica y Análisis Clínicos, Instituto Murciano de Investigación Biosanitaria (IMIB), Hospital Universitario Santa Lucía, 30202 Cartagena, Spain; (V.C.-G.); (A.M.H.)
- Correspondence: (G.L.-G.); (P.C.-Z.); Tel.: +34-968-128-600 (ext. 951615) (G.L.-G. & P.C.-Z.)
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Umano A, Fang K, Qu Z, Scaglione JB, Altinok S, Treadway CJ, Wick ET, Paulakonis E, Karunanayake C, Chou S, Bardakjian TM, Gonzalez-Alegre P, Page RC, Schisler JC, Brown NG, Yan D, Scaglione KM. The molecular basis of spinocerebellar ataxia type 48 caused by a de novo mutation in the ubiquitin ligase CHIP. J Biol Chem 2022; 298:101899. [PMID: 35398354 PMCID: PMC9097460 DOI: 10.1016/j.jbc.2022.101899] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 03/24/2022] [Accepted: 03/28/2022] [Indexed: 11/25/2022] Open
Abstract
The spinocerebellar ataxias (SCAs) are a class of incurable diseases characterized by degeneration of the cerebellum that results in movement disorder. Recently, a new heritable form of SCA, spinocerebellar ataxia type 48 (SCA48), was attributed to dominant mutations in STIP1 homology and U box-containing 1 (STUB1); however, little is known about how these mutations cause SCA48. STUB1 encodes for the protein C terminus of Hsc70 interacting protein (CHIP), an E3 ubiquitin ligase. CHIP is known to regulate proteostasis by recruiting chaperones via a N-terminal tetratricopeptide repeat domain and recruiting E2 ubiquitin-conjugating enzymes via a C-terminal U-box domain. These interactions allow CHIP to mediate the ubiquitination of chaperone-bound, misfolded proteins to promote their degradation via the proteasome. Here we have identified a novel, de novo mutation in STUB1 in a patient with SCA48 encoding for an A52G point mutation in the tetratricopeptide repeat domain of CHIP. Utilizing an array of biophysical, biochemical, and cellular assays, we demonstrate that the CHIPA52G point mutant retains E3-ligase activity but has decreased affinity for chaperones. We further show that this mutant decreases cellular fitness in response to certain cellular stressors and induces neurodegeneration in a transgenic Caenorhabditis elegans model of SCA48. Together, our data identify the A52G mutant as a cause of SCA48 and provide molecular insight into how mutations in STUB1 cause SCA48.
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Affiliation(s)
- A Umano
- Department of Molecular Genetics and Microbiology, Duke University, Durham, North Carolina, USA
| | - K Fang
- Department of Molecular Genetics and Microbiology, Duke University, Durham, North Carolina, USA
| | - Z Qu
- Department of Molecular Genetics and Microbiology, Duke University, Durham, North Carolina, USA
| | - J B Scaglione
- Department of Molecular Genetics and Microbiology, Duke University, Durham, North Carolina, USA
| | - S Altinok
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - C J Treadway
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA; Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - E T Wick
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA; Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - E Paulakonis
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA; Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - C Karunanayake
- Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio, USA
| | - S Chou
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, Wisconsin, USA; Department of Neurology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - T M Bardakjian
- Department of Neurology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - P Gonzalez-Alegre
- Department of Neurology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - R C Page
- Department of Chemistry and Biochemistry, Miami University, Oxford, Ohio, USA
| | - J C Schisler
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - N G Brown
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA; Lineberger Comprehensive Cancer Center, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - D Yan
- Department of Molecular Genetics and Microbiology, Duke University, Durham, North Carolina, USA
| | - K M Scaglione
- Department of Molecular Genetics and Microbiology, Duke University, Durham, North Carolina, USA; Department of Neurology, Duke University, Durham, North Carolina, USA; Duke Center for Neurodegeneration and Neurotherapeutics, Duke University, Durham, North Carolina, USA.
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Evinova A, Hatokova Z, Tatarkova Z, Brodnanova M, Dibdiakova K, Racay P. Endoplasmic reticulum stress induces mitochondrial dysfunction but not mitochondrial unfolded protein response in SH-SY5Y cells. Mol Cell Biochem 2022; 477:965-975. [DOI: 10.1007/s11010-021-04344-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 12/22/2021] [Indexed: 12/06/2022]
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Expression of 3-Methylcrotonyl-CoA Carboxylase in Brain Tumors and Capability to Catabolize Leucine by Human Neural Cancer Cells. Cancers (Basel) 2022; 14:cancers14030585. [PMID: 35158853 PMCID: PMC8833481 DOI: 10.3390/cancers14030585] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 01/20/2022] [Accepted: 01/21/2022] [Indexed: 02/04/2023] Open
Abstract
Leucine is an essential, ketogenic amino acid with proteinogenic, metabolic, and signaling roles. It is readily imported from the bloodstream into the brain parenchyma. Therefore, it could serve as a putative substrate that is complementing glucose for sustaining the metabolic needs of brain tumor cells. Here, we investigated the ability of cultured human cancer cells to metabolize leucine. Indeed, cancer cells dispose of leucine from their environment and enrich their media with the metabolite 2-oxoisocaproate. The enrichment of the culture media with a high level of leucine stimulated the production of 3-hydroxybutyrate. When 13C6-leucine was offered, it led to an increased appearance of the heavier citrate isotope with a molar mass greater by two units in the culture media. The expression of 3-methylcrotonyl-CoA carboxylase (MCC), an enzyme characteristic for the irreversible part of the leucine catabolic pathway, was detected in cultured cancer cells and human tumor samples by immunoprobing methods. Our results demonstrate that these cancer cells can catabolize leucine and furnish its carbon atoms into the tricarboxylic acid (TCA) cycle. Furthermore, the release of 3-hydroxybutyrate and citrate by cancer cells suggests their capability to exchange these metabolites with their milieu and the capability to participate in their metabolism. This indicates that leucine could be an additional substrate for cancer cell metabolism in the brain parenchyma. In this way, leucine could potentially contribute to the synthesis of metabolites such as lipids, which require the withdrawal of citrate from the TCA cycle.
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