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Molina Hernandez JB, Scotti L, Valbonetti L, Gioia L, Paparella A, Paludi D, Aceto A, Ciriolo MR, Chaves Lopez C. Effect of membrane depolarization against Aspergillus niger GM31 resistant by ultra nanoclusters characterized by Ag 2+ and Ag 3+ oxidation state. Sci Rep 2023; 13:2716. [PMID: 36792916 PMCID: PMC9932144 DOI: 10.1038/s41598-023-29918-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 02/13/2023] [Indexed: 02/17/2023] Open
Abstract
To date, the impossibility of treating resistant forms of bacteria and fungi (AMR) with traditional drugs is a cause for global alarm. We have made the green synthesis of Argirium silver ultra nanoclusters (Argirium-SUNCs) very effective against resistant bacteria (< 1 ppm) and mature biofilm (0.6 ppm). In vitro and preclinical tests indicate that SUNCs are approximately 10 times less toxic in human cells than bacteria. Unique chemical-physical characteristics such as particle size < 2 nm, a core composed of Ag0, and a shell of Ag +, Ag2+ , Ag3+ never observed before in stable form in ultra pure water, explain their remarkable redox properties Otto Cars (Lancet Glob. Health 9:6, 2021). Here we show that Argirium-SUNCs have strong antimicrobial properties also against resistant Aspergillus niger GM31 mycelia and spore inactivation (0.6 ppm). The membrane depolarization is a primary target leading to cell death as already observed in bacteria. Being effective against both bacteria and fungi Argirium-SUNCs represent a completely different tool for the treatment of infectious diseases.
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Affiliation(s)
- Junior Bernardo Molina Hernandez
- grid.17083.3d0000 0001 2202 794XFaculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Teramo, Italy
| | - Luca Scotti
- Department of Medical, Oral and Biotechnological Sciences, "G. d'Annunzio" University of Chieti-Pescara, Chieti, Italy.
| | - Luca Valbonetti
- grid.17083.3d0000 0001 2202 794XFaculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Teramo, Italy
| | - Luisa Gioia
- grid.17083.3d0000 0001 2202 794XFaculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Teramo, Italy
| | - Antonello Paparella
- grid.17083.3d0000 0001 2202 794XFaculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Teramo, Italy
| | - Domenico Paludi
- grid.17083.3d0000 0001 2202 794XFaculty of Veterinary Medicine, University of Teramo, Teramo, Italy
| | - Antonio Aceto
- grid.412451.70000 0001 2181 4941Department of Medical, Oral and Biotechnological Sciences, “G. d’Annunzio” University of Chieti-Pescara, Chieti, Italy
| | - Maria Rosa Ciriolo
- grid.6530.00000 0001 2300 0941Department of Biology, University of Rome “Tor Vergata”, Via della Ricerca Scientifica 1, 00133 Rome, Italy
| | - Clemencia Chaves Lopez
- grid.17083.3d0000 0001 2202 794XFaculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Teramo, Italy
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Guo Y, Li Q, Xia R, Cai C. Farrerol exhibits inhibitory effects on lung adenocarcinoma cells by activating the mitochondrial apoptotic pathway. J Biochem Mol Toxicol 2022; 36:e23157. [PMID: 35833306 DOI: 10.1002/jbt.23157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 04/11/2022] [Accepted: 07/01/2022] [Indexed: 11/11/2022]
Abstract
Farrerol is an herbal compound extracted from rhododendron. Here, our study is to investigate biological effects of farrerol on lung adenocarcinoma (LAC) cells. Human LAC cell lines and xenograft mouse model were utilized to define the effects of farrerol on tumor growth. Our findings indicated that farrerol significantly reduced LAC cell viability as well as the colony-forming capacity. Flow cytometry analysis demonstrated that farrerol contributed to cell apoptosis and G0/G1 phase cell cycle arrest. Mechanistically, farrerol treatment upregulated proapoptotic molecules (Bak, Bid, cleaved caspase-3 and cleaved caspase-9) and senescence markers (p16 and p2), but downregulated antiapoptosis genes (Bcl-2 and Bcl-XL) and cell cycle-associated genes (CyclinD1 and CDK4); meanwhile, the phosphorylation of retinoblastoma (Rb) protein was attenuated upon pretreatment of LAC cells with farrerol in comparison to untreated control. Further studies indicated that farrerol elevated reactive oxygen species levels, activating mitochondrial apoptotic pathway and causing cell apoptosis. However, exposure to farrerol did not result in significant apoptosis in normal lung epithelial cells, suggesting a tumor-specific effect of farrerol on LAC cells. In animal model, farrerol showed a significant inhibitory effect on LAC xenograft tumor growth. And gene expressions in tumor tissues, as mentioned above, were in line with the in vitro results. Taken together, these results suggested that farrerol caused LAC cell apoptosis by activating mitochondrial apoptotic pathway, whereas farrerol treatment had no notable effect on normal lung epithelial cells. Farrerol might be an effective therapeutic drug for LAC.
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Affiliation(s)
- Yi Guo
- Department of Pneumology, Shanxi Provincial Cancer Hospital, Taiyuan, Shanxi, China
| | - Quan Li
- Department of Oncology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei, China
| | - Rongmu Xia
- School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Chuanshu Cai
- Department of Radiotherapy, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, China
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Das S, Mukherjee S, Bedi M, Ghosh A. Mutations in the Yeast Cox12 Subunit Severely Compromise the Activity of the Mitochondrial Complex IV. Biochemistry (Mosc) 2021; 86:1607-1623. [PMID: 34937540 DOI: 10.1134/s0006297921120105] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2021] [Revised: 10/25/2021] [Accepted: 11/21/2021] [Indexed: 06/14/2023]
Abstract
Cytochrome c oxidase 6B1 (COX6B1) is one of the less characterized subunits of the mitochondrial electron transport chain complex IV (CIV). Here, we studied the pathobiochemical and respiratory functions of Cox12 (yeast ortholog of COX6B1) using Saccharomyces cerevisiae BY4741 (cox12Δ) cells deficient by the Cox12 protein. The cells exhibited severe growth deficiency in the respiratory glycerol-ethanol medium, which could be reverted by complementation with the yeast COX12 or human COX6B1 genes. Cox12 with arginine 17 residue substituted by histidine (R17H) or cysteine (R17C) (mutations analogous to those observed in human patients) failed to complement the loss of Cox12 function. When cox12Δ cells were grown in rich respiratory/fermentative galactose medium, no changes in the expression of individual respiratory chain subunits were observed. Blue native PAGE/Western blotting analysis using antibodies against Rip1 and Cox1, which are specific components of complexes III (CIII) and IV (CIV), respectively, revealed no noticeable decrease in the native CIII2CIV2 and CIII2CIV1 supercomplexes (SCs). However, the association of the respiratory SC factor 2 (Rcf2) and Cox2 subunit within the SCs of cox12Δ cells was reduced, while the specific activity of CIV was downregulated by 90%. Both basal respiration and succinate-ADP stimulated state 3 respiration, as well as the mitochondrial membrane potential, were decreased in cox12Δ cells. Furthermore, cox12Δ cells and cells synthesizing Cox12 mutants R17H and R17C showed higher sensitivity to the H2O2-induced oxidative stress compared to the wild-type (WT) cells. In silico structural modeling of the WT yeast SCs revealed that Cox12 forms a network of interactions with Rcf2 and Cox2. Together, our results establish that Cox12 is essential for the CIV activity.
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Affiliation(s)
- Shubhojit Das
- Department of Biochemistry, University of Calcutta, Kolkata, 700019, India.
| | | | - Minakshi Bedi
- Department of Biochemistry, University of Calcutta, Kolkata, 700019, India.
| | - Alok Ghosh
- Department of Biochemistry, University of Calcutta, Kolkata, 700019, India.
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Dilberger B, Baumanns S, Spieth ST, Wenzel U, Eckert GP. Infertility induced by auxin in PX627 Caenorhabditis elegans does not affect mitochondrial functions and aging parameters. Aging (Albany NY) 2020; 12:12268-12284. [PMID: 32516128 PMCID: PMC7343439 DOI: 10.18632/aging.103413] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 05/01/2020] [Indexed: 12/17/2022]
Abstract
Caenorhabditis elegans is widely used for aging studies. 5-Fluoro-2´-deoxyuridine (FUdR) is commonly used to control offspring. While larvae are stopped from further development, also mitochondrial DNA and function may be affected. Since mitochondria and longevity are closely related, the use of FUdR may falsify possible studies. PX627, an auxin inducible infertility strain to control offspring, allows mitochondrial investigations during senescence without FUdR toxicity.Longevity and health parameters were assessed in 2- and 10-day old nematodes wild-type N2 and PX627 treated with FUdR or auxin, respectively. Mitochondrial membrane potential, energetic metabolites and reactive oxygen species levels, were determined. mRNA expression levels of key genes involved were quantified using quantitative real-time PCR.FUdR significantly increased lifespan and health parameters, as well as, mitochondrial function compared to untreated controls and auxin treated PX627. Although a decrease in all parameters could be observed in aged nematodes, this was less severe after FUdR exposure. Glycolysis was significantly up-regulated in aged PX627 compared to N2. Expression levels of daf-16, sir-2.1, aak-2, skn-1, atp-2 and atfs-1 were regulated accordingly.Hence, auxin in PX627 might be a good alternative to control progeny, for mitochondrial- and longevity-related investigations in nematodes.
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Affiliation(s)
- Benjamin Dilberger
- Institute of Nutritional Sciences, Laboratory for Nutrition in Prevention and Therapy, Biomedical Research Center Seltersberg (BFS), Justus Liebig University Giessen, Giessen 35392, Germany
| | - Stefan Baumanns
- Molecular Nutrition Research, Interdisciplinary Research Center, Justus Liebig University Giessen, Giessen 35392, Germany
| | - Salome T Spieth
- Institute of Nutritional Sciences, Laboratory for Nutrition in Prevention and Therapy, Biomedical Research Center Seltersberg (BFS), Justus Liebig University Giessen, Giessen 35392, Germany
| | - Uwe Wenzel
- Molecular Nutrition Research, Interdisciplinary Research Center, Justus Liebig University Giessen, Giessen 35392, Germany
| | - Gunter P Eckert
- Institute of Nutritional Sciences, Laboratory for Nutrition in Prevention and Therapy, Biomedical Research Center Seltersberg (BFS), Justus Liebig University Giessen, Giessen 35392, Germany
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Abstract
Food restriction causes a set of physiological changes that reduce the rate of aging. At the level of an organism, these changes are initiated by a hormonal response, which in turn activates certain intracellular signaling cascades. As a result, cells increase their antioxidant capacities and decrease the risk of cancerous transformation. A number of small molecule compounds activating these signaling cascades have been described. One could expect that direct pharmacological activation of the signaling can produce a stronger antiaging effect than that achieved by the indirect hormonal stimulation. Data from the literature point to the opposite. Possibly, a problem with pharmacological activators is that they cause generation of mitochondrial reactive oxygen species. Indeed, hyperpolarized mitochondria are known to induce oxidative stress. Such hyperpolarization could happen because of artificial activation of cellular response to caloric restriction in the absence of energy deficit. At the same time, energy deficit seems likely to be a natural consequence of the shortage of nutrients. Thus, there is a possibility that combining the pharmacological activators with compounds that decrease mitochondrial transmembrane potential, uncouplers, could be a powerful antiaging strategy.
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Affiliation(s)
- D A Knorre
- Lomonosov Moscow State University, Belozersky Institute of Physico-Chemical Biology, Moscow, 119991, Russia.
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Su ZJ, Yang J, Luo WJ, Wei YY, Shuai XH, Hu TJ. Inhibitory effect of Sophora subprosrate polysaccharide on mitochondria oxidative stress induced by PCV-2 infection in RAW264.7 cells. Int J Biol Macromol 2016; 95:608-617. [PMID: 27908718 DOI: 10.1016/j.ijbiomac.2016.11.101] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 11/19/2016] [Accepted: 11/26/2016] [Indexed: 01/29/2023]
Abstract
In the present study, the inhibitory effect of Sophora subprosrate polysaccharide (SSP) on PCV-2-induced mitochondrial respiratory burst in RAW264.7 cells was first investigated. The findings suggested that SOD activity and the anti-superoxide anion radical activity of the RAW264.7 cells were significantly decreased after PCV-2 infection, and MnSOD mRNA levels were significantly decreased, while NOX2 mRNA levels and protein expression were increased. Meanwhile, the O2•- levels and mitochondrial membrane potentials were significantly increased. After treatment with SSP, significant increases in the activities of SOD, anti-superoxide anion radical activities, and MnSOD mRNA levels in the PCV-2 infected cells were observed. Meanwhile, significant increases in NOX2 mRNA levels and protein expression, O2•- levels and mitochondrial membrane potentials were also observed. The results showed that PCV2 infection resulted in the mitochondria oxidative stress of RAW264.7 cells as indicated by an increasing mitochondrial membrane potential, which was then inhibited by SSP. It was concluded that RAW264.7 cells treated with SSP could suffer from mitochondrial damage, which may be mediated by the inhibition of the mitochondrial membrane potential.
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Affiliation(s)
- Zi-Jie Su
- College of Animal Science and Technology, Guangxi University, Nanning 530005, PR China
| | - Jian Yang
- College of Animal Science and Technology, Guangxi University, Nanning 530005, PR China
| | - Wen-Juan Luo
- College of Animal Science and Technology, Guangxi University, Nanning 530005, PR China
| | - Ying-Yi Wei
- College of Animal Science and Technology, Guangxi University, Nanning 530005, PR China
| | - Xue-Hong Shuai
- Veterinary Department of Rongchang Campuses, Southwest University, Rongchang, Chongqing 402460, PR China
| | - Ting-Jun Hu
- College of Animal Science and Technology, Guangxi University, Nanning 530005, PR China.
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Kwolek-Mirek M, Molon M, Kaszycki P, Zadrag-Tecza R. L-carnosine enhanced reproductive potential of the Saccharomyces cerevisiae yeast growing on medium containing glucose as a source of carbon. Biogerontology 2016; 17:737-47. [PMID: 27040824 DOI: 10.1007/s10522-016-9645-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 03/30/2016] [Indexed: 01/04/2023]
Abstract
Carnosine is an endogenous dipeptide composed of β-alanine and L-histidine, which occurs in vertebrates, including humans. It has a number of favorable properties including buffering, chelating, antioxidant, anti-glycation and anti-aging activities. In our study we used the Saccharomyces cerevisiae yeast as a model organism to examine the impact of L-carnosine on the cell lifespan. We demonstrated that L-carnosine slowed down the growth and decreased the metabolic activity of cells as well as prolonged their generation time. On the other hand, it allowed for enhancement of the yeast reproductive potential and extended its reproductive lifespan. These changes may be a result of the reduced mitochondrial membrane potential and decreased ATP content in the yeast cells. However, due to reduction of the post-reproductive lifespan, L-carnosine did not have an influence on the total lifespan of yeast. In conclusion, L-carnosine does not extend the total lifespan of S. cerevisiae but rather it increases the yeast's reproductive capacity by increasing the number of daughter cells produced.
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Duicu OM, Mirica SN, Gheorgheosu DE, Privistirescu AI, Fira-Mladinescu O, Muntean DM. Ageing-induced decrease in cardiac mitochondrial function in healthy rats. Can J Physiol Pharmacol 2013; 91:593-600. [PMID: 23889593 DOI: 10.1139/cjpp-2012-0422] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
It is widely recognized that mitochondrial dysfunction is a key component of the multifactorial process of ageing. The effects of age on individual components of mitochondrial function vary across species and strains. In this study we investigated the oxygen consumption, the mitochondrial membrane potential (Δψ), the sensitivity of mitochondrial permeability transition pore (mPTP) to calcium overload, and the production of reactive oxygen species (ROS) in heart mitochondria isolated from old compared with adult healthy Sprague-Dawley rats. Respirometry studies and Δψ measurements were performed with an Oxygraph-2k equipped with a tetraphenylphosphonium electrode. ROS production and calcium retention capacity were measured spectrofluorimetrically. Our results show an important decline for all bioenergetic parameters for both complex I and complex II supported-respiration, a decreased Δψ in mitochondria energized with complex I substrates, and an increased mitochondrial ROS production in the old compared with the adult group. Mitochondrial sensitivity to Ca²⁺-induced mPTP opening was also increased in the old compared with the adult animals. Moreover, the protective effect of cyclosporine A on mPTP opening was significantly reduced in the old group. We conclude that healthy ageing is associated with a decrease in heart mitochondria function in Sprague-Dawley rats.
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Affiliation(s)
- Oana M Duicu
- Department of Pathophysiology, Victor Babeş University of Medicine and Pharmacy Timisoara, 14 Tudor Vladimirescu Street, 300173 Timişoara, Timiş, Romania
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