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Nweke CO, Nwangwu OR, Okechi RN, Araka NN, Ogbonna CJ. Statistical modeling of hormesis quantities in inverted U-shaped dose-response relationships by reparameterization of a bilogistic model. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2022; 57:1003-1023. [PMID: 36433811 DOI: 10.1080/10934529.2022.2138056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 10/07/2022] [Accepted: 10/07/2022] [Indexed: 06/16/2023]
Abstract
Statistical procedures that allow quantitative determination of hormesis features are required for quantitative characterization of hormesis to provide information on the biphasic dose-response phenomenon and its variability. Only a direct estimate of individual effective doses in hormetic dose-response relationships is possible using prior extensions of the bilogistic model of Beckon and coworkers. This study presented further extensions of the model to determine the toxic potency and hormetic dose zone by estimating two effective doses simultaneously. In addition, the extended models allow for partitioning the hormetic dose zone through the dose of maximum stimulation. This study demonstrated a 4-step statistical modeling approach to quantify 20 hormesis quantities. The applicability and challenges of the mathematical procedures are discussed based on a few examples of hormetic dose-response relationships. The syntaxes for the analyses were provided as Appendix to demonstrate its implementation in SAS® statistical software. Given the variability of hormetic dose-responses generated from toxicological studies in many disciplines, the proposed approach cannot apply to all dose-response patterns. However, we hope the proposed extensions could provide versatile statistical tools for quantitatively exploring a variety of biphasic dose-response curves.
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Affiliation(s)
- Christian O Nweke
- Department of Microbiology, Federal University of Technology Owerri, Owerri, Nigeria
| | - Oluchukwu R Nwangwu
- Department of Microbiology, Federal University of Technology Owerri, Owerri, Nigeria
| | - Reuben N Okechi
- Department of Biotechnology, Federal University of Technology Owerri, Owerri, Nigeria
| | - Nnamdi N Araka
- Department of Mathematics, Federal University of Technology Owerri, Owerri, Nigeria
| | - Chukwudi J Ogbonna
- Department of Statistics, Federal University of Technology Owerri, Owerri, Nigeria
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2
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Albers JL, Steibel JP, Klingler RH, Ivan LN, Garcia-Reyero N, Carvan MJ, Murphy CA. Altered Larval Yellow Perch Swimming Behavior Due to Methylmercury and PCB126 Detected Using Hidden Markov Chain Models. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:3514-3523. [PMID: 35201763 DOI: 10.1021/acs.est.1c07505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Fish swimming behavior is a commonly measured response in aquatic ecotoxicology because behavior is considered a whole organism-level effect that integrates many sensory systems. Recent advancements in animal behavior models, such as hidden Markov chain models (HMM), suggest an improved analytical approach for toxicology. Using both new and traditional approaches, we examined the sublethal effects of PCB126 and methylmercury on yellow perch (YP) larvae (Perca flavescens) using three doses. Both approaches indicate larvae increase activity after exposure to either chemical. The middle methylmercury-dosed larvae showed multiple altered behavior patterns. First, larvae had a general increase in activity, typically performing more behavior states, more time swimming, and more swimming bouts per second. Second, when larvae were in a slow or medium swimming state, these larvae tended to switch between these states more often. Third, larvae swam slower during the swimming bouts. The upper PCB126-dosed larvae exhibited a higher proportion and a fast swimming state, but the total time spent swimming fast decreased. The middle PCB126-dosed larvae transitioned from fast to slow swimming states less often than the control larvae. These results indicate that developmental exposure to very low doses of these neurotoxicants alters YP larvae overall swimming behaviors, suggesting neurodevelopment alteration.
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Affiliation(s)
- Janice L Albers
- Department of Fisheries and Wildlife, Michigan State University, East Lansing, Michigan 48824, United States
| | - Juan P Steibel
- Department of Fisheries and Wildlife, Michigan State University, East Lansing, Michigan 48824, United States
| | - Rebekah H Klingler
- School of Freshwater Sciences, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53204, United States
| | - Lori N Ivan
- Department of Fisheries and Wildlife, Michigan State University, East Lansing, Michigan 48824, United States
| | - Natàlia Garcia-Reyero
- Environmental Laboratory, US Army Engineer Research and Development Center, Vicksburg, Mississippi, 39180, United States
| | - Michael J Carvan
- School of Freshwater Sciences, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53204, United States
| | - Cheryl A Murphy
- Department of Fisheries and Wildlife, Michigan State University, East Lansing, Michigan 48824, United States
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Mimicking caloric restriction for anti-aging effects: the pro-oxidant role of alpha-ketoglutarate. CURRENT OPINION IN TOXICOLOGY 2022. [DOI: 10.1016/j.cotox.2022.02.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Daily acute intermittent hypoxia enhances serotonergic innervation of hypoglossal motor nuclei in rats with and without cervical spinal injury. Exp Neurol 2022; 347:113903. [PMID: 34699788 PMCID: PMC8848979 DOI: 10.1016/j.expneurol.2021.113903] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Revised: 10/17/2021] [Accepted: 10/20/2021] [Indexed: 01/03/2023]
Abstract
Intermittent hypoxia elicits protocol-dependent effects on hypoglossal (XII) motor plasticity. Whereas low-dose, acute intermittent hypoxia (AIH) elicits serotonin-dependent plasticity in XII motor neurons, high-dose, chronic intermittent hypoxia (CIH) elicits neuroinflammation that undermines AIH-induced plasticity. Preconditioning with repeated AIH and mild CIH enhance AIH-induced XII motor plasticity. Since intermittent hypoxia pre-conditioning could enhance serotonin-dependent XII motor plasticity by increasing serotonergic innervation density of the XII motor nuclei, we tested the hypothesis that 3 distinct intermittent hypoxia protocols commonly studied to elicit plasticity (AIH) or simulate aspects of sleep apnea (CIH) differentially affect XII serotonergic innervation. Sleep apnea and associated CIH are common in people with cervical spinal injuries and, since repetitive AIH is emerging as a promising therapeutic strategy to improve respiratory and non-respiratory motor function after spinal injury, we also tested the hypotheses that XII serotonergic innervation is increased by repetitive AIH and/or CIH in rats with cervical C2 hemisections (C2Hx). Serotonergic innervation was assessed via immunofluorescence in male Sprague Dawley rats, with and without C2Hx (beginning 8 weeks post-injury) exposed to 28 days of: 1) normoxia; 2) daily AIH (10, 5-min 10.5% O2 episodes per day; 5-min normoxic intervals); 3) mild CIH (5-min 10.5% O2 episodes; 5-min intervals; 8 h/day); and 4) moderate CIH (2-min 10.5% O2 episodes; 2-min intervals; 8 h/day). Daily AIH, but neither CIH protocol, increased the area of serotonergic immunolabeling in the XII motor nuclei in both intact and injured rats. C2Hx per se had no effect on XII serotonergic innervation density. Thus, daily AIH may increases XII serotonergic innervation and function, enhancing the capacity for serotonin-dependent, AIH-induced plasticity in upper airway motor neurons. Such effects may preserve upper airway patency and/or swallowing ability in people with cervical spinal cord injuries and other clinical disorders that compromise breathing and airway defense.
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Wagner VP, Spuldaro TR, Nör F, Gaio EJ, Castilho RM, Carrard VC, Rösing CK. Can propranolol act as a chemopreventive agent during oral carcinogenesis? An experimental animal study. Eur J Cancer Prev 2021; 30:315-321. [PMID: 33136608 DOI: 10.1097/cej.0000000000000626] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The multistep process of oral carcinogenesis provides a biological rationale for the use of chemoprevention in individuals at increased risk of developing oral cancer. We aimed to determine if low doses of propranolol can prevent the development of oral cancer using a tobacco-relevant and p53-associated animal model of cancer initiation. Twenty-six Wistar rats were randomly allocated into two groups, vehicle, and propranolol. All animals received 4-nitroquinoline N-oxide (4NQO) at 25 ppm diluted in the drinking water for 20 weeks. Animals from the propranolol group received propranolol (0.1 mg/kg) 5 days per week by gavage for 18 weeks. The clinical analysis was performed by measuring the area of the lesion and assessment of scores based on lesion appearance (papule; plaque; nodule or ulcerated). Histopathological analysis was performed to determine the presence of epithelial dysplasia or invasive squamous cell carcinoma (SCC). The average lesion area in 4NQO + vehicle and in 4NQO + propranolol groups were 0.20 and 0.28 mm2, respectively (P = 0.53). The percentage of cases clinically graded as papules, thick plaques, nodular areas, and ulcerated lesions was similar between groups (P = 0.94). Histopathological diagnosis also did not differ between groups (P = 0.65), with 54.5 and 70% of cases being diagnosed as SCC in 4NQO and in 4NQO + propranolol groups, respectively. In conclusion, daily doses propranolol at 0.1 mg/kg were not as effective as a chemopreventive therapy in an animal model of 4NQO-induced carcinogenesis.
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Affiliation(s)
- Vivian P Wagner
- Department of Oral Pathology, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul
- Department of Oral Diagnosis, University of Campinas, Piracicaba, São Paulo
| | - Tobias R Spuldaro
- Department of Periodontology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Felipe Nör
- Department of Oral Pathology, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul
- Department of Oral Pathology, Radiology and Medicine, University of Iowa College of Dentistry, Iowa City, Iowa
| | - Eduardo J Gaio
- Department of Periodontology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Rogerio M Castilho
- Department of Periodontics and Oral Medicine, Laboratory of Epithelial Biology, University of Michigan School of Dentistry; Comprehensive Cancer Center, University of Michigan, Ann Arbor, Michigan, USA
| | - Vinicius C Carrard
- Department of Oral Pathology, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul
| | - Cassiano K Rösing
- Department of Periodontology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
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6
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Pleiotropic effects of alpha-ketoglutarate as a potential anti-ageing agent. Ageing Res Rev 2021; 66:101237. [PMID: 33340716 DOI: 10.1016/j.arr.2020.101237] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 10/23/2020] [Accepted: 12/14/2020] [Indexed: 02/07/2023]
Abstract
An intermediate of tricarboxylic acid cycle alpha-ketoglutarate (AKG) is involved in pleiotropic metabolic and regulatory pathways in the cell, including energy production, biosynthesis of certain amino acids, collagen biosynthesis, epigenetic regulation of gene expression, regulation of redox homeostasis, and detoxification of hazardous substances. Recently, AKG supplement was found to extend lifespan and delay the onset of age-associated decline in experimental models such as nematodes, fruit flies, yeasts, and mice. This review summarizes current knowledge on metabolic and regulatory functions of AKG and its potential anti-ageing effects. Impact on epigenetic regulation of ageing via being an obligate substrate of DNA and histone demethylases, direct antioxidant properties, and function as mimetic of caloric restriction and hormesis-induced agent are among proposed mechanisms of AKG geroprotective action. Due to influence on mitochondrial respiration, AKG can stimulate production of reactive oxygen species (ROS) by mitochondria. According to hormesis hypothesis, moderate stimulation of ROS production could have rather beneficial biological effects, than detrimental ones, because of the induction of defensive mechanisms that improve resistance to stressors and age-related diseases and slow down functional senescence. Discrepancies found in different models and limitations of AKG as a geroprotective drug are discussed.
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7
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Brudzynski K, Sjaarda CP. Colloidal structure of honey and its influence on antibacterial activity. Compr Rev Food Sci Food Saf 2021; 20:2063-2080. [PMID: 33569893 DOI: 10.1111/1541-4337.12720] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 12/23/2020] [Accepted: 01/13/2021] [Indexed: 01/17/2023]
Abstract
Honey colloidal structure emerges as a new trend in research on honey functions since it became recognized as a major factor altering bioactivity of honey compounds. In honey complex matrix, macromolecules self-associate to colloidal particles at the critical concentration, driven by honey viscosity. Sequestration of macromolecules into colloids changes their activities and affects honey antibacterial function. This review fills the 80-year-old gap in research on honey colloidal structure. It summarizes past and current status of the research on honey colloids and describes physicochemical properties and the mechanisms of colloid formation and their dissociation upon honey dilution. The experimental observations are explained in the context of theoretical background of colloidal science. The functional changes and bioactivity of honey macromolecules bound to colloidal particles are illustrated here by the production of H2 O2 by glucose oxidase and the effect they have on antibacterial activity of honey. The changes in the production of H2 O2 and antibacterial activity of honey were coordinated with the changes in the aggregation-dissociation states of honey colloidal particles upon dilution. In all cases, these changes were nonlinear, assuming an inverted U-shaped dose-response curve. At the curve maximum, the production of H2 O2 and antibacterial activity reached the peak. The curve maximum signaled the minimum honey concentration required for the phase separation. With phase transition from two-phase colloidal condense state to dilute state dispersion, the change to opposite effects of dilution on these honey's activities occurred. Thus, the colloidal structure strongly influences bioactivity of honey compounds and affects its antibacterial activity.
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Affiliation(s)
- Katrina Brudzynski
- Department of Drug Discovery, Bee-Bimedical Inc., St. Catharines, Ontario, Canada.,Department of Biological Sciences, Brock University and Department of Drug Discovery, Bee-Biomedicals Inc., St. Catharines, Ontario, Canada
| | - Calvin P Sjaarda
- Queen's Genomics Lab at Ongwanada (Q-GLO), Kingston, Ontario, Canada.,Department of Psychiatry, Queen's University, Kingston, Ontario, Canada
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8
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Nunes S, Viana SD, Preguiça I, Alves A, Fernandes R, Teodoro JS, Figueirinha A, Salgueiro L, Silva S, Jarak I, Carvalho RA, Cavadas C, Rolo AP, Palmeira CM, Pintado MM, Reis F. Blueberry Consumption Challenges Hepatic Mitochondrial Bioenergetics and Elicits Transcriptomics Reprogramming in Healthy Wistar Rats. Pharmaceutics 2020; 12:pharmaceutics12111094. [PMID: 33202669 PMCID: PMC7697217 DOI: 10.3390/pharmaceutics12111094] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 11/04/2020] [Accepted: 11/11/2020] [Indexed: 12/17/2022] Open
Abstract
An emergent trend of blueberries’ (BB) “prophylactic” consumption, due to their phytochemicals’ richness and well-known health-promoting claims, is widely scaled-up. However, the benefits arising from BB indiscriminate intake remains puzzling based on incongruent preclinical and human data. To provide a more in-depth elucidation and support towards a healthier and safer consumption, we conducted a translation-minded experimental study in healthy Wistar rats that consumed BB in a juice form (25 g/kg body weight (BW)/day; 14 weeks’ protocol). Particular attention was paid to the physiological adaptations succeeding in the gut and liver tissues regarding the acknowledged BB-induced metabolic benefits. Systemically, BB boosted serum antioxidant activity and repressed the circulating levels of 3-hydroxybutyrate (3-HB) ketone bodies and 3-HB/acetoacetate ratio. Moreover, BB elicited increased fecal succinic acid levels without major changes on gut microbiota (GM) composition and gut ultra-structural organization. Remarkably, an accentuated hepatic mitochondrial bioenergetic challenge, ensuing metabolic transcriptomic reprogramming along with a concerted anti-inflammatory pre-conditioning, was clearly detected upon long-term consumption of BB phytochemicals. Altogether, the results disclosed herein portray a quiescent mitochondrial-related metabolomics and hint for a unified adaptive response to this nutritional challenge. The beneficial or noxious consequences arising from this dietary trend should be carefully interpreted and necessarily claims future research.
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Affiliation(s)
- Sara Nunes
- Institute of Pharmacology & Experimental Therapeutics & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (S.N.); (S.D.V.); (I.P.); (A.A.); (R.F.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-504 Coimbra, Portugal;
- Clinical Academic Center of Coimbra (CACC), 3004-504 Coimbra, Portugal
| | - Sofia D. Viana
- Institute of Pharmacology & Experimental Therapeutics & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (S.N.); (S.D.V.); (I.P.); (A.A.); (R.F.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-504 Coimbra, Portugal;
- Clinical Academic Center of Coimbra (CACC), 3004-504 Coimbra, Portugal
- Polytechnic Institute of Coimbra, ESTESC-Coimbra Health School, Pharmacy/Biomedical Laboratory Sciences, 3046-854 Coimbra, Portugal
| | - Inês Preguiça
- Institute of Pharmacology & Experimental Therapeutics & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (S.N.); (S.D.V.); (I.P.); (A.A.); (R.F.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-504 Coimbra, Portugal;
- Clinical Academic Center of Coimbra (CACC), 3004-504 Coimbra, Portugal
| | - André Alves
- Institute of Pharmacology & Experimental Therapeutics & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (S.N.); (S.D.V.); (I.P.); (A.A.); (R.F.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-504 Coimbra, Portugal;
- Clinical Academic Center of Coimbra (CACC), 3004-504 Coimbra, Portugal
| | - Rosa Fernandes
- Institute of Pharmacology & Experimental Therapeutics & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (S.N.); (S.D.V.); (I.P.); (A.A.); (R.F.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-504 Coimbra, Portugal;
- Clinical Academic Center of Coimbra (CACC), 3004-504 Coimbra, Portugal
| | - João S. Teodoro
- Department of Life Sciences, Faculty of Science and Technology (FCTUC), University of Coimbra, 3000-456 Coimbra, Portugal; (J.S.T.); (R.A.C.); (A.P.R.); (C.M.P.)
- Center for Neurosciences and Cell Biology of Coimbra (CNC), University of Coimbra, 3004-504 Coimbra, Portugal
| | - Artur Figueirinha
- Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal; (A.F.); (L.S.)
- LAQV, REQUIMTE, Faculty of Pharmacy, University of Coimbra, 3000-456 Coimbra, Portugal
| | - Lígia Salgueiro
- Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal; (A.F.); (L.S.)
- CIEPQPF, Chemical Process Engineering and Forest Products Research Centre, University of Coimbra, 3000-456 Coimbra, Portugal
| | - Sara Silva
- CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Universidade Católica Portuguesa, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (S.S.); (M.M.P.)
| | - Ivana Jarak
- Department of Microscopy, Laboratory of Cell Biology and Unit for Multidisciplinary Research in Biomedicine (UMIB), Institute of Biomedical Sciences Abel Salazar (ICBAS), University of Porto, 4050-313 Porto, Portugal;
| | - Rui A. Carvalho
- Department of Life Sciences, Faculty of Science and Technology (FCTUC), University of Coimbra, 3000-456 Coimbra, Portugal; (J.S.T.); (R.A.C.); (A.P.R.); (C.M.P.)
- Associated Laboratory for Green Chemistry-Clean Technologies and Processes, REQUIMTE, Faculty of Sciences and Technology, University of Porto, 4050-313 Porto, Portugal
| | - Cláudia Cavadas
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-504 Coimbra, Portugal;
- Clinical Academic Center of Coimbra (CACC), 3004-504 Coimbra, Portugal
- Center for Neurosciences and Cell Biology of Coimbra (CNC), University of Coimbra, 3004-504 Coimbra, Portugal
- Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal; (A.F.); (L.S.)
| | - Anabela P. Rolo
- Department of Life Sciences, Faculty of Science and Technology (FCTUC), University of Coimbra, 3000-456 Coimbra, Portugal; (J.S.T.); (R.A.C.); (A.P.R.); (C.M.P.)
- Center for Neurosciences and Cell Biology of Coimbra (CNC), University of Coimbra, 3004-504 Coimbra, Portugal
| | - Carlos M. Palmeira
- Department of Life Sciences, Faculty of Science and Technology (FCTUC), University of Coimbra, 3000-456 Coimbra, Portugal; (J.S.T.); (R.A.C.); (A.P.R.); (C.M.P.)
- Center for Neurosciences and Cell Biology of Coimbra (CNC), University of Coimbra, 3004-504 Coimbra, Portugal
| | - Maria M. Pintado
- CBQF—Centro de Biotecnologia e Química Fina—Laboratório Associado, Universidade Católica Portuguesa, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal; (S.S.); (M.M.P.)
| | - Flávio Reis
- Institute of Pharmacology & Experimental Therapeutics & Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (S.N.); (S.D.V.); (I.P.); (A.A.); (R.F.)
- Center for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, 3004-504 Coimbra, Portugal;
- Clinical Academic Center of Coimbra (CACC), 3004-504 Coimbra, Portugal
- Correspondence: ; Tel.: +351-239-480-053
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Gómez-Sierra T, Medina-Campos ON, Solano JD, Ibarra-Rubio ME, Pedraza-Chaverri J. Isoliquiritigenin Pretreatment Induces Endoplasmic Reticulum Stress-Mediated Hormesis and Attenuates Cisplatin-Induced Oxidative Stress and Damage in LLC-PK1 Cells. Molecules 2020; 25:molecules25194442. [PMID: 32992605 PMCID: PMC7582730 DOI: 10.3390/molecules25194442] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/19/2020] [Accepted: 09/26/2020] [Indexed: 12/11/2022] Open
Abstract
Isoliquiritigenin (IsoLQ) is a flavonoid with antioxidant properties and inducer of endoplasmic reticulum (ER) stress. In vitro and in vivo studies show that ER stress-mediated hormesis is cytoprotective; therefore, natural antioxidants and ER stress inducers have been used to prevent renal injury. Oxidative stress and ER stress are some of the mechanisms of damage involved in cisplatin (CP)-induced nephrotoxicity. This study aims to explore whether IsoLQ pretreatment induces ER stress and produces hormesis to protect against CP-induced nephrotoxicity in Lilly Laboratories Cell-Porcine Kidney 1 (LLC-PK1) cells. During the first stage of this study, both IsoLQ protective concentration and pretreatment time against CP-induced toxicity were determined by cell viability. At the second stage, the effect of IsoLQ pretreatment on cell viability, ER stress, and oxidative stress were evaluated. IsoLQ pretreatment in CP-treated cells induces expression of glucose-related proteins 78 and 94 kDa (GRP78 and GRP94, respectively), attenuates CP-induced cell death, decreases reactive oxygen species (ROS) production, and prevents the decrease in glutathione/glutathione disulfide (GSH/GSSG) ratio, free thiols levels, and glutathione reductase (GR) activity. These data suggest that IsoLQ pretreatment has a moderately protective effect on CP-induced toxicity in LLC-PK1 cells, through ER stress-mediated hormesis, as well as by the antioxidant properties of IsoLQ.
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10
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Putnam HM, Ritson-Williams R, Cruz JA, Davidson JM, Gates RD. Environmentally-induced parental or developmental conditioning influences coral offspring ecological performance. Sci Rep 2020; 10:13664. [PMID: 32788607 PMCID: PMC7423898 DOI: 10.1038/s41598-020-70605-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 06/23/2020] [Indexed: 01/22/2023] Open
Abstract
The persistence of reef building corals is threatened by human-induced environmental change. Maintaining coral reefs into the future requires not only the survival of adults, but also the influx of recruits to promote genetic diversity and retain cover following adult mortality. Few studies examine the linkages among multiple life stages of corals, despite a growing knowledge of carryover effects in other systems. We provide a novel test of coral parental conditioning to ocean acidification (OA) and tracking of offspring for 6 months post-release to better understand parental or developmental priming impacts on the processes of offspring recruitment and growth. Coral planulation was tracked for 3 months following adult exposure to high pCO2 and offspring from the second month were reciprocally exposed to ambient and high pCO2 for an additional 6 months. Offspring of parents exposed to high pCO2 had greater settlement and survivorship immediately following release, retained survivorship benefits during 1 and 6 months of continued exposure, and further displayed growth benefits to at least 1 month post release. Enhanced performance of offspring from parents exposed to high conditions was maintained despite the survivorship in both treatments declining in continued exposure to OA. Conditioning of the adults while they brood their larvae, or developmental acclimation of the larvae inside the adult polyps, may provide a form of hormetic conditioning, or environmental priming that elicits stimulatory effects. Defining mechanisms of positive acclimatization, with potential implications for carry over effects, cross-generational plasticity, and multi-generational plasticity, is critical to better understanding ecological and evolutionary dynamics of corals under regimes of increasing environmental disturbance. Considering environmentally-induced parental or developmental legacies in ecological and evolutionary projections may better account for coral reef response to the chronic stress regimes characteristic of climate change.
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Affiliation(s)
- Hollie M Putnam
- Department of Biological Sciences, University of Rhode Island, Kingston, RI, USA.
| | | | - Jolly Ann Cruz
- Micronesia Islands Nature Alliance, Garapan, Saipan, CNMI, 96950, USA
| | - Jennifer M Davidson
- Hawai'i Institute of Marine Biology, University of Hawai'i, Mānoa, Honolulu, HI, USA
| | - Ruth D Gates
- Hawai'i Institute of Marine Biology, University of Hawai'i, Mānoa, Honolulu, HI, USA
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11
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Reactive Carbonyls Induce TOR- and Carbohydrate-Dependent Hormetic Response in Yeast. ScientificWorldJournal 2020; 2020:4275194. [PMID: 32231465 PMCID: PMC7091552 DOI: 10.1155/2020/4275194] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 01/25/2020] [Accepted: 02/05/2020] [Indexed: 01/03/2023] Open
Abstract
The induction of the beneficial and detrimental effects by reactive carbonyl species in yeast has been investigated. In this study, we have presented evidence that glyoxal and methylglyoxal at low concentrations were able to induce a hormetic adaptive response in glucose-grown but not fructose-grown yeast. The hormetic effect was also TOR-dependent. The mutation in genes encoding either TOR1 or TOR2 protein makes yeast highly sensitive to both α-dicarbonyls studied. Simultaneous disruption of TOR1 and TOR2 resulted in higher yeast sensitivity to the α-dicarbonyls as compared to parental cells, but double mutant survived better under carbonyl stress than its single mutant counterparts. The data obtained are consistent with the previous works which reported high toxicity of the α-dicarbonyls and extend them with the report on the beneficial TOR-dependent hormetic effect of glyoxal and methylglyoxal.
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Md Zin SR, Kassim NM, Mohamed Z, Fateh AH, Alshawsh MA. Potential toxicity effects of Anastatica hierochuntica aqueous extract on prenatal development of Sprague-Dawley rats. JOURNAL OF ETHNOPHARMACOLOGY 2019; 245:112180. [PMID: 31445135 DOI: 10.1016/j.jep.2019.112180] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Revised: 08/13/2019] [Accepted: 08/21/2019] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Anastatica hierochuntica (A. hierochuntica) is a plant consumed in folk medicine for the treatment of reproductive system related problems and metabolic disorders. It is of concern that the herb is commonly consumed by pregnant women towards the end of pregnancy to ease the process of labour, despite the lack of studies evaluating its safety. AIM OF THIS STUDY This study aimed to investigate the potential toxicity effects of A. hierochuntica in pregnant Sprague-Dawley rats and their developing foetuses. MATERIALS AND METHODS Experiments were conducted in accordance to the Organisation for Economic Co-operation and Development guideline 414. Animals were randomly divided into four groups (n = 10 females per group): negative control (received the vehicle only), experimental animals received 250, 500, and 1000 mg/kg A. hierochuntica aqueous extracts (AHAE), respectively. Treatment was administered daily by oral gavage from gestational day (GD) 6-20, and caesarian section performed on GD21. RESULTS There were significant reduction in the corrected maternal weight gain of dams and body weight of foetuses in the lowest and highest dose of AHAE-treated animals compared to the control. These findings were associated with the increase in anogenital distance index and multiple congenital anomalies observed in some of the offspring. On the other hand, rats treated with 500 mg/kg showed higher embryonic survival rate with absence of significant treatment-related effect. CONCLUSION Findings showed that highest and lowest doses of AHAE have prenatal toxicity effects in SD rats. Therefore, AHAE is potentially harmful to the developing foetuses especially when consumed during the period of implantation and organogenesis. As for the rats treated with 500 mg/kg AHAE, there was no significant treatment-related effect. Hence, we postulate that this finding suggests that the disruption on the hormonal regulation could have been compensated by negative feedback response. The compensated effects of AHAE at 500 mg/kg and the presence of lowest observed adverse effect level (LOAEL) at 250 mg/kg has resulted in a non-monotonous dose response curve (NMDRC), which complicates the determination of the value of no-observed-adverse effect level (NOAEL).
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Affiliation(s)
- Siti Rosmani Md Zin
- Department of Anatomy, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Normadiah M Kassim
- Department of Anatomy, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Zahurin Mohamed
- Department of Pharmacology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Abdulmannan H Fateh
- Department of Pharmacology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Mohammed A Alshawsh
- Department of Pharmacology, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia
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Sohrabi M. UNIVERSAL RADIATION PROTECTION SYSTEM (URPS); A NATURAL GLOBAL STANDARDISED TREND FOR HUMAN EXPOSURE CONTROL IN 21st CENTURY. RADIATION PROTECTION DOSIMETRY 2019; 184:277-284. [PMID: 31141148 DOI: 10.1093/rpd/ncz097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Indexed: 06/09/2023]
Abstract
In order to address the many deficiencies with current radiological protection system worldwide, this paper proposes a new Universal Radiation Protection System (URPS) Hypothesis with novel philosophy, concepts and methodologies of applying principles of equal human health-effect risks of an individual per unit radiation dose either from environmental natural background (NBG) or man-made sources; a 'standardised integrated dose system' for integrating all individual doses with emphasis on national NBG doses; considering worker as a member of public; and a 'cause-effect conservation principle' for epidemiology risk estimation. The URPS also a radiation hypothesises fractionation weighting factors (WF); a 'URPS Model' for bridging 'linear no-threshold and hormesis models'; example dose limit for workers; as well as new terms and definitions. State-of-the-art developments on URPS hypothesis are presented and discussed with simple global natural trends for standardised human exposure control in order to protect workers, patients, public and environment by standardised methods independent of source and country of origin in the 21st century.
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Affiliation(s)
- M Sohrabi
- Health Physics and Dosimetry Research Laboratory, Department of Energy Engineering and Physics, Amirkabir University of Technology, Tehran, Iran
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14
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Kale Ş, Korcum AF, Dündar E, Erin N. HSP90 inhibitor PU-H71 increases radiosensitivity of breast cancer cells metastasized to visceral organs and alters the levels of inflammatory mediators. Naunyn Schmiedebergs Arch Pharmacol 2019; 393:253-262. [PMID: 31522240 DOI: 10.1007/s00210-019-01725-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 08/26/2019] [Indexed: 12/11/2022]
Abstract
Heat shock protein 90 (HSP90) inhibitors are considered as new radiosensitizing agents. PU-H71, a novel HSP90 inhibitor, is under evaluation for the treatment of advanced cancer. It is however not known whether PU-H71 alters radiosensitivity of metastatic breast cancer. Hence, we here evaluated mechanisms of possible anti-tumoral and radiosensitizing effects of PU-H71 on breast carcinoma cells metastasized to vital organs such as the liver and brain. The effect of PU-H71 on proliferation of breast carcinoma cells was determined using 4T1 cells and its brain (4TBM), liver (4TLM), and heart (4THM) metastatic subsets as well as non-metastatic 67NR cells. Changes in radiation sensitivity were determined by clonogenic assays. Changes in client proteins and levels of angiogenic and inflammatory mediators from these cancer cell cultures and ex vivo cultures were detected. PU-H71 alone inhibited ERK1/2, p38, and Akt activation and reduced N-cadherin and HER2 which further documented the anti-tumoral effects of PU-H71. The combination of PU-H71 and radiotherapy induced cytotoxic effect than PU-H71 alone, and PU-H71 showed a radiosensitizing effect in vitro. On the other hand, PU-H71 and radiation co-treatment increased p38 phosphorylation which is one of the hallmarks of inflammatory response. Accordingly, IL-6 secretion was increased following PU-H71 and radiotherapy co-treatment ex vivo. Levels of angiogenic and inflammatory factors such as MIP-2, SDF-1, and VEGF were increased under in vitro conditions but not under ex vivo conditions. These results demonstrated for the first time that PU-H71 enhances therapeutic effects of radiotherapy especially in highly metastatic breast carcinoma but a possible increase in inflammatory response should also be considered.
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Affiliation(s)
- Şule Kale
- Department of Pharmacology, School of Medicine, Akdeniz University, B-block, First floor, SBAUM, 07070, Antalya, Turkey
| | - Aylin F Korcum
- Department of Radiation Oncology, School of Medicine, Akdeniz University, 07070, Antalya, Turkey
| | - Ertuğrul Dündar
- Department of Radiation Oncology, School of Medicine, Akdeniz University, 07070, Antalya, Turkey
| | - Nuray Erin
- Department of Pharmacology, School of Medicine, Akdeniz University, B-block, First floor, SBAUM, 07070, Antalya, Turkey.
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15
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Choline-Based Ionic Liquids as Media for the Growth of Saccharomyces cerevisiae. Processes (Basel) 2019. [DOI: 10.3390/pr7070471] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Ionic liquids (ILs) have garnered great attention as alternative solvents in many biological reactions and applications. However, its unknown toxicity is in line with the challenges to use it for biological applications. In this study, three choline based Ionic Liquids—choline saccharinate (CS), choline dihydrogen phosphate (CDHP), and choline tryptophanate (CT) were assessed for their suitability on the growth of Saccharomyces cerevisiae. The ILs were incorporated into the growth media of S. cerevisiae (defined as synthetic media) to access its potential as a substitute to conventional media. The compatibility of the synthetic media was evaluated based on the toxicity (EC50), growth curve, and glucose profile. The results showed that the incorporation of CDHP and CS did promote the growth of S. cerevisiae with a rapid glucose consumption rate. The growth of S. cerevisiae with the media composition of yeast extract, peptone, and CS showed improvement of 13%. We believe that these observations have implications in the biocompatibility studies of ILs to microorganisms.
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16
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Patel H, Patel F, Jani V, Jha N, Ansari A, Paliwal B, Rathod B, Patel D, Patel P, Kothari V. Anti-pathogenic potential of a classical ayurvedic Triphala formulation. F1000Res 2019; 8:1126. [PMID: 33093941 PMCID: PMC7549186 DOI: 10.12688/f1000research.19787.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/22/2020] [Indexed: 11/20/2022] Open
Abstract
A classical
ayurvedic polyherbal formulation namely
Triphala was assessed for its anti-pathogenic potential against five different pathogenic bacteria. Virulence of four of them towards the model host
Caenorhabditis elegans was attenuated (by 18-45%) owing to pre-treatment with
Triphala Formulation (TF) (≤20 µg/ml). TF
could also exert significant therapeutic effect on worms already infected with
Chromobacterium violaceum (MTCC 2656),
Serratia marcescens (MTCC 97) or
Staphylococcus aureus (MTCC 737). Prophylactic use of TF
allowed worms to score 14-41% better survival in face of subsequent pathogen challenge. Repeated exposure to this formulation induced resistance in
S. marcescens, but not in
P. aeruginosa. It also exerted a post-extract effect (PEE) on three of the test pathogens. TF was able to modulate production of quorum sensing (QS)-regulated pigments in three of the multidrug-resistant gram-negative test bacteria. Haemolytic activity of
S. aureus was heavily inhibited under the influence of this formulation.
P. aeruginosa's lysozyme-susceptibility was found to increase by ~25-43% upon TF-pretreatment. These results validate therapeutic potential of one of the most widely used polyherbal
ayurvedic formulations called
Triphala.
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Affiliation(s)
- Hinal Patel
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Foram Patel
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Vinit Jani
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Neha Jha
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Afsa Ansari
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Bhumika Paliwal
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Bharatsingh Rathod
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Dhruvi Patel
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Pooja Patel
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Vijay Kothari
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
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17
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Patel H, Patel F, Jani V, Jha N, Ansari A, Paliwal B, Rathod B, Patel D, Patel P, Kothari V. Anti-pathogenic potential of a classical ayurvedic Triphala formulation. F1000Res 2019; 8:1126. [PMID: 33093941 PMCID: PMC7549186 DOI: 10.12688/f1000research.19787.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/22/2020] [Indexed: 08/27/2023] Open
Abstract
A classical ayurvedic polyherbal formulation namely Triphala was assessed for its anti-pathogenic potential against five different pathogenic bacteria. Virulence of four of them towards the model host Caenorhabditis elegans was attenuated (by 18-45%) owing to pre-treatment with Triphala Formulation (TF) (≤20 µg/ml). TF could also exert significant therapeutic effect on worms already infected with Chromobacterium violaceum (MTCC 2656), Serratia marcescens (MTCC 97) or Staphylococcus aureus (MTCC 737). Prophylactic use of TF allowed worms to score 14-41% better survival in face of subsequent pathogen challenge. Repeated exposure to this formulation induced resistance in S. marcescens, but not in P. aeruginosa. It also exerted a post-extract effect (PEE) on three of the test pathogens. TF was able to modulate production of quorum sensing (QS)-regulated pigments in three of the multidrug-resistant gram-negative test bacteria. Haemolytic activity of S. aureus was heavily inhibited under the influence of this formulation. P. aeruginosa's lysozyme-susceptibility was found to increase by ~25-43% upon TF-pretreatment. These results validate therapeutic potential of one of the most widely used polyherbal ayurvedic formulations called Triphala.
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Affiliation(s)
- Hinal Patel
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Foram Patel
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Vinit Jani
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Neha Jha
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Afsa Ansari
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Bhumika Paliwal
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Bharatsingh Rathod
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Dhruvi Patel
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Pooja Patel
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
| | - Vijay Kothari
- Institute of Science, Nirma University, Ahmedabad, Gujarat, 382481, India
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18
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Complex Relationships between the Blue Pigment Marennine and Marine Bacteria of the Genus Vibrio. Mar Drugs 2019; 17:md17030160. [PMID: 30857186 PMCID: PMC6471480 DOI: 10.3390/md17030160] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 02/28/2019] [Accepted: 03/04/2019] [Indexed: 12/15/2022] Open
Abstract
Marennine, the water-soluble blue pigment produced by the marine diatom Haslea ostrearia, is known to display antibacterial activities. Previous studies have demonstrated a prophylactic effect of marennine on bivalve larvae challenged with a pathogenic Vibrio splendidus, suggesting that the blue Haslea is a good candidate for applications in aquaculture as a source of a natural antimicrobial agent. Indeed, the genus Vibrio is ubiquitous in aquaculture ecosystems, and regular events of pathogenic invasion cause some of the biggest losses worldwide. To better characterize the effects of marennine on Vibrios, a panel of 30 Vibrio strains belonging to 10 different species was tested, including bivalve pathogenic species (e.g., Vibrio crassostreae and Vibrio harveyi). Vibrio strains were first exposed to 10 and 25 µg mL-1 of Blue Water (BW), a concentrated culture supernatant of H. ostrearia containing marennine. This screening evidenced a great diversity in responses, from growth stimulation to a total inhibition, at both the interspecific or intraspecific level. In a second series of experiments, 10 Vibrio strains were exposed to BW at concentrations ranging from 5 to 80 µg mL-1. The highest concentrations of BW did not systematically result in the highest growth inhibition as hormetic responses-opposite effects regarding the concentration-were occasionally evidenced. The relationships between marennine and Vibrio strains appear more complex than expected and justify further study-in particular, on the mechanisms of action-before considering applications as a natural prophylactic or antibiotic agent in aquaculture.
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19
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Simões T, Novais SC, Natal-da-Luz T, Devreese B, de Boer T, Roelofs D, Sousa JP, van Straalen NM, Lemos MFL. Using time-lapse omics correlations to integrate toxicological pathways of a formulated fungicide in a soil invertebrate. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 246:845-854. [PMID: 30623841 DOI: 10.1016/j.envpol.2018.12.069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 12/18/2018] [Accepted: 12/22/2018] [Indexed: 06/09/2023]
Abstract
The use of an integrative molecular approach can actively improve the evaluation of environmental health status and impact of chemicals, providing the knowledge to develop sentinel tools that can be integrated in risk assessment studies, since gene and protein expressions represent the first response barriers to anthropogenic stress. This work aimed to determine the mechanisms of toxic action of a widely applied fungicide formulation (chlorothalonil), following a time series approach and using a soil model arthropod, Folsomia candida. To link effects at different levels of biological organization, data were collected on reproduction, gene expression and protein levels, in a time series during exposure to a natural soil. Results showed a mechanistic mode of action for chlorothalonil, affecting pathways of detoxification and excretion, immune response, cellular respiration, protein metabolism and oxidative stress defense, causing irregular cell signaling (JNK and NOD ½ pathways), DNA damage and abnormal cell proliferation, leading to impairment in developmental features such as molting cycle and reproduction. The omics datasets presented highly significant positive correlations between the gene expression levels at a certain time-point and the corresponding protein products 2-3 days later. The integrated omics in this study has provided useful insights into pesticide mechanisms of toxicity, evidencing the relevance of such analyses in toxicological studies, and highlighting the importance of considering a time-series when integrating these datasets.
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Affiliation(s)
- Tiago Simões
- MARE - Marine and Environmental Sciences Centre, ESTM, Polytechnic Institute of Leiria, Peniche, Portugal; Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Portugal; Department of Ecological Science, Vrije Universiteit, Amsterdam, The Netherlands.
| | - Sara C Novais
- MARE - Marine and Environmental Sciences Centre, ESTM, Polytechnic Institute of Leiria, Peniche, Portugal; Department of Ecological Science, Vrije Universiteit, Amsterdam, The Netherlands
| | - Tiago Natal-da-Luz
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Portugal
| | - Bart Devreese
- Laboratory for Microbiology (LM-Ugent), Ghent University, Belgium
| | - Tjalf de Boer
- Department of Ecological Science, Vrije Universiteit, Amsterdam, The Netherlands
| | - Dick Roelofs
- Department of Ecological Science, Vrije Universiteit, Amsterdam, The Netherlands
| | - José P Sousa
- Centre for Functional Ecology, Department of Life Sciences, University of Coimbra, Portugal
| | - Nico M van Straalen
- Department of Ecological Science, Vrije Universiteit, Amsterdam, The Netherlands
| | - Marco F L Lemos
- MARE - Marine and Environmental Sciences Centre, ESTM, Polytechnic Institute of Leiria, Peniche, Portugal
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20
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Pereira MT, Malik M, Nostro JA, Mahler GJ, Musselman LP. Effect of dietary additives on intestinal permeability in both Drosophila and a human cell co-culture. Dis Model Mech 2018; 11:dmm034520. [PMID: 30504122 PMCID: PMC6307910 DOI: 10.1242/dmm.034520] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 10/06/2018] [Indexed: 12/13/2022] Open
Abstract
Increased intestinal barrier permeability has been correlated with aging and disease, including type 2 diabetes, Crohn's disease, celiac disease, multiple sclerosis and irritable bowel syndrome. The prevalence of these ailments has risen together with an increase in industrial food processing and food additive consumption. Additives, including sugar, metal oxide nanoparticles, surfactants and sodium chloride, have all been suggested to increase intestinal permeability. We used two complementary model systems to examine the effects of food additives on gut barrier function: a Drosophila in vivo model and an in vitro human cell co-culture model. Of the additives tested, intestinal permeability was increased most dramatically by high sugar. High sugar also increased feeding but reduced gut and overall animal size. We also examined how food additives affected the activity of a gut mucosal defense factor, intestinal alkaline phosphatase (IAP), which fluctuates with bacterial load and affects intestinal permeability. We found that high sugar reduced IAP activity in both models. Artificial manipulation of the microbiome influenced gut permeability in both models, revealing a complex relationship between the two. This study extends previous work in flies and humans showing that diet can play a role in the health of the gut barrier. Moreover, simple models can be used to study mechanisms underlying the effects of diet on gut permeability and function.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Matthew T Pereira
- Department of Biological Sciences, Binghamton University, Binghamton, New York 13902, USA
| | - Mridu Malik
- Department of Biomedical Engineering, Binghamton University, Binghamton, New York 13902, USA
| | - Jillian A Nostro
- Department of Biological Sciences, Binghamton University, Binghamton, New York 13902, USA
| | - Gretchen J Mahler
- Department of Biomedical Engineering, Binghamton University, Binghamton, New York 13902, USA
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21
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Herlinger AL, Almeida AR, Presti-Silva SM, Pereira EV, Andrich F, Pires RGW, Martins-Silva C. Behavioral, Biochemical and Molecular Characterization of a Parkinson's Disease Mouse Model Using the Neurotoxin 2'-CH 3-MPTP: A Novel Approach. Neuromolecular Med 2018; 20:73-82. [PMID: 29332269 DOI: 10.1007/s12017-018-8476-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 01/03/2018] [Indexed: 10/18/2022]
Abstract
The neurotoxin MPTP has long been used to create a mouse model of Parkinson's disease (PD). Indeed, several MPTP analogues have been developed, including 2'-CH3-MPTP, which was shown to induce nigrostriatal DA neuronal depletion more potently than MPTP. However, no study on behavioral and molecular alterations in response to 2'-CH3-MPTP has been carried out so far. In the present work, 2'-CH3-MPTP was administered to mice (2.5, 5.0 and 10 mg/kg per injection, once a day, 5 days) and histological, biochemical, molecular and behavioral alterations were evaluated. We show that, despite a dose-dependent-like pattern observed for nigrostriatal dopaminergic neuronal death and dopamine depletion, dose-specific alterations in dopamine metabolism and in the expression of dopaminergic neurotransmission-associated genes could be related to specific motor deficits elicited by the different doses tested. Interestingly, 2'-CH3-MPTP leads to increased DAT and MAO-B transcription, which could explain, respectively, its higher potency and the requirement of higher doses of MAO inhibitors to prevent nigrostriatal neuronal death when compared to MPTP. Also, perturbations in dopamine metabolism as well as possible alterations in dopamine bioavailability in the synaptic cleft were also identified and correlated with strength and ambulation deficits in response to specific doses. Overall, the present work brings new evidence supporting the distinct effects of 2'-CH3-MPTP when compared to its analogue MPTP. Moreover, our data highlight the utmost importance of a precise experimental design, as different administration regimens and doses yield different biochemical, molecular and behavioral alterations, which can be explored to study specific aspects of PD.
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Affiliation(s)
- Alice Laschuk Herlinger
- Laboratory of Molecular and Behavioral Neurobiology, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil. .,Graduate Program in Biochemistry and Pharmacology, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil. .,Department of Genetics, Biology Institute, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, 21941-902, Brazil.
| | - Agihane Rodrigues Almeida
- Laboratory of Molecular and Behavioral Neurobiology, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil.,Graduate Program in Biochemistry and Pharmacology, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Sarah Martins Presti-Silva
- Laboratory of Molecular and Behavioral Neurobiology, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil.,Graduate Program in Biochemistry and Pharmacology, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Evaldo Vitor Pereira
- Graduate Program in Biochemistry and Pharmacology, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil.,Department of Physiological Sciences, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Filipe Andrich
- Laboratory of Molecular and Behavioral Neurobiology, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil.,Graduate Program in Biochemistry and Pharmacology, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Rita Gomes Wanderley Pires
- Laboratory of Molecular and Behavioral Neurobiology, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil.,Graduate Program in Biochemistry and Pharmacology, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil.,Department of Physiological Sciences, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil
| | - Cristina Martins-Silva
- Laboratory of Molecular and Behavioral Neurobiology, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil.,Graduate Program in Biochemistry and Pharmacology, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil.,Department of Physiological Sciences, Health Sciences Center, Federal University of Espirito Santo, Vitoria, ES, Brazil
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22
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Physiological and pathological processes of synaptic plasticity and memory in drug discovery: Do not forget the dose-response curve. Eur J Pharmacol 2017; 817:59-70. [DOI: 10.1016/j.ejphar.2017.05.058] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 03/20/2017] [Accepted: 05/30/2017] [Indexed: 01/24/2023]
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23
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Chevillotte G, Bernard A, Varret C, Ballet P, Bodin L, Roudot AC. Probabilistic assessment method of the non-monotonic dose-responses-Part I: Methodological approach. Food Chem Toxicol 2017; 106:376-385. [PMID: 28579547 DOI: 10.1016/j.fct.2017.05.070] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 05/09/2017] [Accepted: 05/30/2017] [Indexed: 11/15/2022]
Abstract
More and more studies aim to characterize non-monotonic dose response curves (NMDRCs). The greatest difficulty is to assess the statistical plausibility of NMDRCs from previously conducted dose response studies. This difficulty is linked to the fact that these studies present (i) few doses tested, (ii) a low sample size per dose, and (iii) the absence of any raw data. In this study, we propose a new methodological approach to probabilistically characterize NMDRCs. The methodology is composed of three main steps: (i) sampling from summary data to cover all the possibilities that may be presented by the responses measured by dose and to obtain a new raw database, (ii) statistical analysis of each sampled dose-response curve to characterize the slopes and their signs, and (iii) characterization of these dose-response curves according to the variation of the sign in the slope. This method allows characterizing all types of dose-response curves and can be applied both to continuous data and to discrete data. The aim of this study is to present the general principle of this probabilistic method which allows to assess the non-monotonic dose responses curves, and to present some results.
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Affiliation(s)
- Grégoire Chevillotte
- Laboratoire d'Evaluation du Risque Chimique pour le Consommateur (LERCCo), Université Européenne de Bretagne - Université de Bretagne Occidentale (UEB-UBO), UFR Sciences et Techniques, 6 Av. Victor Le Gorgeu, CS93837, 29238 Brest Cedex 3, France.
| | - Audrey Bernard
- Laboratoire d'Evaluation du Risque Chimique pour le Consommateur (LERCCo), Université Européenne de Bretagne - Université de Bretagne Occidentale (UEB-UBO), UFR Sciences et Techniques, 6 Av. Victor Le Gorgeu, CS93837, 29238 Brest Cedex 3, France
| | - Clémence Varret
- Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail (Anses), 14 rue Pierre et Marie Curie, 94701 Maisons-Alfort, Cedex, France
| | - Pascal Ballet
- Laboratoire de Traitement de l'Information Medicale (LaTIM), INSERM UMR 1101, Université Européenne de Bretagne - Université de Bretagne Occidentale (UEB-UBO), Département informatique - UFR Sciences et Techniques, 20 avenue Le Gorgeu, CS93837, 29238 Brest Cedex 3, France
| | - Laurent Bodin
- Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail (Anses), 14 rue Pierre et Marie Curie, 94701 Maisons-Alfort, Cedex, France
| | - Alain-Claude Roudot
- Laboratoire d'Evaluation du Risque Chimique pour le Consommateur (LERCCo), Université Européenne de Bretagne - Université de Bretagne Occidentale (UEB-UBO), UFR Sciences et Techniques, 6 Av. Victor Le Gorgeu, CS93837, 29238 Brest Cedex 3, France
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Shamelashvili KL, Shtemenko NI, Leus ІV, Babiy SO, Shtemenko OV. Changes in oxidative stress intensity in blood of tumor-bearing rats following different modes of administration of rhenium-platinum system. UKRAINIAN BIOCHEMICAL JOURNAL 2016; 88:29-39. [DOI: 10.15407/ubj88.04.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Dietary alpha-ketoglutarate increases cold tolerance in Drosophila melanogaster and enhances protein pool and antioxidant defense in sex-specific manner. J Therm Biol 2016; 60:1-11. [DOI: 10.1016/j.jtherbio.2016.06.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 06/04/2016] [Accepted: 06/05/2016] [Indexed: 12/11/2022]
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Semchyshyn HM, Valishkevych BV. Hormetic Effect of H2O2 in Saccharomyces cerevisiae: Involvement of TOR and Glutathione Reductase. Dose Response 2016; 14:1559325816636130. [PMID: 27099601 PMCID: PMC4822199 DOI: 10.1177/1559325816636130] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
In this study, we investigated the relationship between target of rapamycin (TOR) and H2O2-induced hormetic response in the budding yeast Saccharomyces cerevisiae grown on glucose or fructose. In general, our data suggest that: (1) hydrogen peroxide (H2O2) induces hormesis in a TOR-dependent manner; (2) the H2O2-induced hormetic dose-response in yeast depends on the type of carbohydrate in growth medium; (3) the concentration-dependent effect of H2O2 on yeast colony growth positively correlates with the activity of glutathione reductase that suggests the enzyme involvement in the H2O2-induced hormetic response; and (4) both TOR1 and TOR2 are involved in the reciprocal regulation of the activity of glucose-6-phosphate dehydrogenase and glyoxalase 1.
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Affiliation(s)
- Halyna M Semchyshyn
- Department of Biochemistry and Biotechnology, Vassyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
| | - Bohdana V Valishkevych
- Department of Biochemistry and Biotechnology, Vassyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
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Lushchak VI. Time-course and intensity-based classifications of oxidative stresses and their potential application in biomedical, comparative and environmental research. Redox Rep 2016; 21:262-70. [PMID: 26828292 DOI: 10.1080/13510002.2015.1126940] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
OBJECTIVE We propose some clues for classification of oxidative stresses based on their intensity and time-course. BACKGROUND Oxidative stress is studied for more than three decades and it is clear that it may differ on the parameters of interest. But up to now there is no any system for formal discrimination between different types of the stress. Such approach can provide important benefits at description of experimental data. METHOD We briefly review information on oxidative stresses and show that the theoretical concept is actually poorly developed since introduction of the first definition in 1985 by H. Sies. We argue that the stresses can differ on their intensities and time-curses, but there was no theoretical basis for discrimination between them. RESULTS On the basis of these analyses, we propose two systems of classifications of oxidative stresses enabling their description taking into account their intensity and time-course. We analyze essential biomarkers of oxidative stress to be used for classification such as levels of modified by reactive oxygen species proteins, lipids, nucleic acids, and low molecular mass compounds. Finally, we describe potential applications of the proposed classifications to biomedical, comparative and environmental research. CONCLUSION The proposed classifications of oxidative stress may facilitate description of experimental data and their comparison between different organisms and methods of induction of oxidative stresses. Additionally this work may provide some clues to develop quantitative approaches for formal categorization of oxidative stresses. APPLICATION Most applications of the classifications proposed are theoretical and applied studies where oxidative stress takes place.
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Affiliation(s)
- Volodymyr I Lushchak
- a Department of Biochemistry and Biotechnology , Vasyl Stefanyk Precarpathian National University , 57 Shevchenko Str., Ivano-Frankivsk 76018 , Ukraine
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Carbon Sources for Yeast Growth as a Precondition of Hydrogen Peroxide Induced Hormetic Phenotype. Int J Microbiol 2015; 2015:697813. [PMID: 26843865 PMCID: PMC4710903 DOI: 10.1155/2015/697813] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 12/10/2015] [Indexed: 12/19/2022] Open
Abstract
Hormesis is a phenomenon of particular interest in biology, medicine, pharmacology, and toxicology. In this study, we investigated the relationship between H2O2-induced hormetic response in S. cerevisiae and carbon sources in yeast growth medium. In general, our data indicate that (i) hydrogen peroxide induces hormesis in a concentration-dependent manner; (ii) the effect of hydrogen peroxide on yeast reproductive ability depends on the type of carbon substrate in growth medium; and (iii) metabolic and growth rates as well as catalase activity play an important role in H2O2-induced hormetic response in yeast.
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Rea JNM, Carvalho A, McNerlan SE, Alexander HD, Rea IM. Genes and life-style factors in BELFAST nonagenarians: Nature, Nurture and Narrative. Biogerontology 2015; 16:587-97. [PMID: 25773008 PMCID: PMC4552771 DOI: 10.1007/s10522-015-9567-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 03/04/2015] [Indexed: 12/01/2022]
Abstract
Understanding how to 'Age Longer and Age Well' is a priority for people personally, for populations globally and for government policy. Nonagenarians are the oldest members of our societies and survivors of their generation. Approximately 10 % of nonagenarians reach 90 years and beyond in good condition and seem to have a combination of both age-span and health-span. But what are the factors which help people reach their ninetieth birthday and beyond in good condition? Are they genetics, as in 'nature', or do they depend on 'nurture' and are related to environment, or are both factors inextricably intertwined within the concept of behavioural genetics? Nonagenarians have rich life experiences that can teach us much about ageing well; they are reservoirs of genetic, life-style and behavioural information which can help dissect out how to live not only longer but better. Personal family history and narrative are powerful tools that help to determine familial traits, beliefs and social behaviours and when used in parallel with new biotechnology methods inform and elaborate causality. Here we present themes and insights from personal narrative enquiry from nonagenarian participants from the Belfast Elderly Longitudinal Free-living Ageing STudy (BELFAST) about factors they consider important for good quality ageing and relate these insights to the emerging genetics and life-style evidence associated with healthy longevity.
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Affiliation(s)
- Jennifer Nicola M. Rea
- Research Department Primary Care and Population Health, University College London, London, UK
| | - Ashley Carvalho
- School of Medicine, Dentistry and Biomedical Science, Queens University Belfast, Belfast, Northern Ireland, UK
| | - Susan E. McNerlan
- Regional Cytogenetics Laboratory, Belfast Health and Social Care Trust, Belfast, Northern Ireland, UK
| | - H. Denis Alexander
- School of Biomedical Science, University of Ulster, Coleraine, Northern Ireland, UK
| | - Irene Maeve Rea
- School of Medicine, Dentistry and Biomedical Science, Queens University Belfast, Belfast, Northern Ireland, UK
- School of Biomedical Science, University of Ulster, Coleraine, Northern Ireland, UK
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Lushchak VI. Free radicals, reactive oxygen species, oxidative stress and its classification. Chem Biol Interact 2014; 224:164-75. [PMID: 25452175 DOI: 10.1016/j.cbi.2014.10.016] [Citation(s) in RCA: 884] [Impact Index Per Article: 88.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2014] [Revised: 10/13/2014] [Accepted: 10/17/2014] [Indexed: 12/18/2022]
Abstract
Reactive oxygen species (ROS) initially considered as only damaging agents in living organisms further were found to play positive roles also. This paper describes ROS homeostasis, principles of their investigation and technical approaches to investigate ROS-related processes. Especial attention is paid to complications related to experimental documentation of these processes, their diversity, spatiotemporal distribution, relationships with physiological state of the organisms. Imbalance between ROS generation and elimination in favor of the first with certain consequences for cell physiology has been called "oxidative stress". Although almost 30years passed since the first definition of oxidative stress was introduced by Helmut Sies, to date we have no accepted classification of oxidative stress. In order to fill up this gape here classification of oxidative stress based on its intensity is proposed. Due to that oxidative stress may be classified as basal oxidative stress (BOS), low intensity oxidative stress (LOS), intermediate intensity oxidative stress (IOS), and high intensity oxidative stress (HOS). Another classification of potential interest may differentiate three categories such as mild oxidative stress (MOS), temperate oxidative stress (TOS), and finally severe (strong) oxidative stress (SOS). Perspective directions of investigations in the field include development of sophisticated classification of oxidative stresses, accurate identification of cellular ROS targets and their arranged responses to ROS influence, real in situ functions and operation of so-called "antioxidants", intracellular spatiotemporal distribution and effects of ROS, deciphering of molecular mechanisms responsible for cellular response to ROS attacks, and ROS involvement in realization of normal cellular functions in cellular homeostasis.
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Affiliation(s)
- Volodymyr I Lushchak
- Department of Biochemistry and Biotechnology, Precarpathian National University named after Vassyl Stefanyk, 57 Shevchenko Str., Ivano-Frankivsk 76025, Ukraine.
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