keyword
MENU ▼
Read by QxMD icon Read
search

Hormesis

keyword
https://www.readbyqxmd.com/read/28622829/investigation-of-j-shaped-dose-responses-induced-by-exposure-to-the-alkylating-agent-n-methyl-n-nitrosourea
#1
Katherine E Chapman, George R Hoffmann, Shareen H Doak, Gareth J S Jenkins
Hormesis is defined as a biphasic dose-response where biological effects of low doses of a stressor demonstrate the opposite effect to high-dose effects of the same stressor. Hormetic, or J-shaped, dose-response relationships are relatively rarely observed in toxicology, resulting in a limited understanding and even some skepticism of the concept. Low dose-response studies for genotoxicity endpoints have been performed at Swansea University for over a decade. However, no statistically significant decreases below control genotoxicity levels have been detected until recently...
July 2017: Mutation Research
https://www.readbyqxmd.com/read/28617331/hormesis-and-defense-of-infectious-disease
#2
REVIEW
Sebastian Weis, Ignacio Rubio, Kristin Ludwig, Cynthia Weigel, Elisa Jentho
Infectious diseases are a global health burden and remain associated with high social and economic impact. Treatment of affected patients largely relies on antimicrobial agents that act by directly targeting microbial replication. Despite the utility of host specific therapies having been assessed in previous clinical trials, such as targeting the immune response via modulating the cytokine release in sepsis, results have largely been frustrating and did not lead to the introduction of new therapeutic tools...
June 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28599128/acute-and-chronic-sensitivity-to-copper-of-a-promising-ecotoxicological-model-species-the-annual-killifish-nothobranchius-furzeri
#3
Charlotte Philippe, Arnout F Grégoir, Lizanne Janssens, Tom Pinceel, Gudrun De Boeck, Luc Brendonck
Nothobranchius furzeri is a promising model for ecotoxicological research due to the species' short life cycle and the production of drought-resistant eggs. Although the species is an emerging vertebrate fish model for several fundamental as well as applied research domains, its potential for ecotoxicological research has not yet been tested. The aim of this study was to characterise the acute and chronic sensitivity of this species to copper as compared to other model organisms. Effects of both acute and chronic copper exposure were tested on survival, life history and physiological traits...
June 6, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28595318/mediterranean-diet-and-inflammaging-within-the-hormesis-paradigm
#4
Morena Martucci, Rita Ostan, Fiammetta Biondi, Elena Bellavista, Cristina Fabbri, Claudia Bertarelli, Stefano Salvioli, Miriam Capri, Claudio Franceschi, Aurelia Santoro
A coherent set of epidemiological data shows that the Mediterranean diet has beneficial effects capable of preventing a variety of age-related diseases in which low-grade, chronic inflammation/inflammaging plays a major role, but the underpinning mechanism(s) is/are still unclear. It is argued here that the Mediterranean diet can be conceptualized as a form of chronic hormetic stress, similar to what has been proposed regarding calorie restriction, the most thoroughly studied nutritional intervention. Data on the presence in key Mediterranean foods of a variety of compounds capable of exerting hormetic effects are summarized, and the mechanistic role of the nuclear factor erythroid 2 pathway is highlighted...
June 8, 2017: Nutrition Reviews
https://www.readbyqxmd.com/read/28595161/non-linear-actions-of-physiological-agents-finite-disarrangements-elicit-fitness-benefits
#5
REVIEW
Filip Sedlic, Zdenko Kovac
Finite disarrangements of important (vital) physiological agents and nutrients can induce plethora of beneficial effects, exceeding mere attenuation of the specific stress. Such response to disrupted homeostasis appears to be universally conserved among species. The underlying mechanism of improved fitness and longevity, when physiological agents act outside their normal range is similar to hormesis, a phenomenon whereby toxins elicit beneficial effects at low doses. Due to similarity with such non-linear response to toxins described with J-shaped curve, we have coined a new term "mirror J-shaped curves" for non-linear response to finite disarrangement of physiological agents...
May 18, 2017: Redox Biology
https://www.readbyqxmd.com/read/28588428/umbelliprenin-mediates-its-apoptotic-effect-by-hormesis-a-commentary
#6
Omid Gholami
No abstract text is available yet for this article.
April 2017: Dose-response: a Publication of International Hormesis Society
https://www.readbyqxmd.com/read/28570961/nonlinear-responses-to-waterborne-cadmium-exposure-in-zebrafish-an-in-vivo-study
#7
Elisavet A Renieri, Dimitris G Sfakianakis, Athanasios A Alegakis, Irina V Safenkova, Aleksandra Buha, Vesna Matović, Maria Tzardi, Boris B Dzantiev, Pascal Divanach, Maroudio Kentouri, Aristidis M Tsatsakis
Cadmium (Cd) has proved to be associated with numerous toxic effects in aquatic organisms via waterborne exposure. With a view to investigate Cd toxicity along a broad spectrum of exposures reaching from environmental to toxic, we employed adult zebrafish (Danio rerio) for an in vivo study. A number of 10 fish per tank were placed in 40L tanks and were exposed for 30 days to 0.0, 5.0, 25, 50, 75, 100 and 1000μgCd per liter. There were 2 tanks for each Cd exposure (duplicate experiment). Mortality was recorded daily, dead fish were collected and tissue samples were obtained for histologic observation, whereas remaining tissues were stored for Cd burden determination...
August 2017: Environmental Research
https://www.readbyqxmd.com/read/28560404/intermittent-low-dose-irradiation-enhances-the-effectiveness-of-radio-and-chemo-therapy-for-human-colorectal-adenocarcinoma-cell-line-ht-29
#8
Yang Wang, Yezhou Li, Li Yang, Dexin Yin
Low dose irradiation (LDIR) induces hormesis and adaptive response in organism and mammalian cell lines. Notably, LDIR generates distinct biological effects in cancer cells from normal cells, e.g., it may affect the growth of cancer cells via the activation of certain cell signaling pathway, which does not exist in normal cells. Therefore, LDIR is considered as a promising assistant method of clinical cancer therapy. In this study, we chose human colorectal adenocarcinoma cell line HT-29 as the experimental model, and investigated the differential biological effects between 250 mGy single dose LDIR and 250 mGy intermittent LDIR pretreatments in high dose irradiation (HDIR) radiotherapy and 5-fluorouracil (5-FU) based chemotherapy...
May 30, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28539853/treatment-of-cancer-and-inflammation-with-low-dose-ionizing-radiation-three-case-reports
#9
Shuji Kojima, Mitsutoshi Tsukimoto, Noriko Shimura, Hironobu Koga, Akishisa Murata, Tsuyoshi Takara
There is considerable evidence from experimental studies in animals, as well as from clinical reports, that low-dose radiation hormesis is effective for the treatment of cancer and ulcerative colitis. In this study, we present 3 case reports that support the clinical efficacy of low-dose radiation hormesis in patients with these diseases. First, a patient with prostate cancer who had undergone surgical resection showed a subsequent increase in prostate-specific antigen (PSA). His PSA value started decreasing immediately after the start of repeated low-dose X-ray irradiation treatment and remained low thereafter...
January 2017: Dose-response: a Publication of International Hormesis Society
https://www.readbyqxmd.com/read/28520891/sublethal-effects-of-thiamethoxam-on-the-demographic-parameters-of-myzus-persicae-hemiptera-aphididae
#10
Pan Wang, Li-Lin Zhou, Fan Yang, Mang Li, Xiao-Ming Liu, Yong Wang, Chao-Liang Lei, Sheng-Yun Si
The green peach aphid, Myzus persicae Sulzer (Hemiptera: Aphididae), is an important sap-sucking pest of many crops, including Chinese cabbage, Brassinca oleracea L. The neonicotinoid insecticide thiamethoxam has been used as an effective insecticide to control M. persicae in cabbage fields. In this study, we assessed the effects of sublethal concentrations of thiamethoxam on demographic parameters of M. persicae. In leaf-dip bioassays, thiamethoxam showed a relatively high toxicity against M. persicae with an LC50 of 6...
May 17, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28503972/molecular-mechanisms-of-anti-oxidant-and-anti-aging-effects-induced-by-convallatoxin-in-caenorhabditis-elegans
#11
Jia Xu, Youming Guo, Tianzhuo Sui, Qifei Wang, Yue Zhang, Ruining Zhang, Mingyang Wang, Shuwen Guan, Liping Wang
Convallatoxin is widely used as a cardiac glycoside in acute and chronic congestive heart-failure and paroxysmal tachycardia, with many effects and underlying protective mechanisms on inflammation and cellular proliferation. However, convallatoxin has not been investigated in its antioxidant effects and lifespan extension in Caenorhabditis elegans. In this study, we found that convallatoxin (20 μM) could significantly prolong the lifespan of wild-type C. elegans up to 16.3% through daf-16, but not sir-2.1 signaling and increased thermotolerance and resistance to paraquat-induced oxidative stress...
May 14, 2017: Free Radical Research
https://www.readbyqxmd.com/read/28485107/low-doses-of-glyphosate-enhance-growth-co2-assimilation-stomatal-conductance-and-transpiration-in-sugarcane-and-eucalyptus
#12
Renan F Nascentes, Caio A Carbonari, Plinio S Simões, Marcela C Brunelli, Edivaldo D Velini, Stephen O Duke
INTRODUCTION: Sublethal doses of herbicides can enhance plant growth and stimulate other process, an effect known as hormesis. The magnitude of hormesis is dependent on the plant species, the herbicide and its dose, plant development stage, and environmental parameters. Glyphosate hormesis is well established, but relatively little is known of the mechanism of this phenomenon. The objective of this study was to determine if low doses of glyphosate that cause growth stimulation in sugarcane and eucalyptus concomitantly stimulate CO2 assimilation...
May 9, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28481896/physiological-effects-of-autotoxicity-due-to-dhap-stress-on-picea-schrenkiana-regeneration
#13
Li Yang, Xiao Ruan, Dean Jiang, Jianhong Zhang, Cunde Pan, Qiang Wang
Picea Schrenkiana as one of the most important zonal vegetation was an endemic species in Middle Asia. Natural regeneration of P. Schrenkiana is a long existing problem troubling scientists. The autotoxicity of 3,4-dihydroxy-acetophenone (DHAP) was found to be a causative factor causing the failure of P. Schrenkiana natural regeneration. The effects of concentrations of DHAP treatment on the viability of root cell, activities of antioxidant enzymes and levels of P. Schrenkiana phytohormones were performed to disclose the physiological mechanism of DHAP autotoxicity...
2017: PloS One
https://www.readbyqxmd.com/read/28397803/tomatidine-enhances-lifespan-and-healthspan-in-c-elegans-through-mitophagy-induction-via-the-skn-1-nrf2-pathway
#14
Evandro F Fang, Tyler B Waltz, Henok Kassahun, Qiping Lu, Jesse S Kerr, Marya Morevati, Elayne M Fivenson, Bradley N Wollman, Krisztina Marosi, Mark A Wilson, Wendy B Iser, D Mark Eckley, Yongqing Zhang, Elin Lehrmann, Ilya G Goldberg, Morten Scheibye-Knudsen, Mark P Mattson, Hilde Nilsen, Vilhelm A Bohr, Kevin G Becker
Aging is a major international concern that brings formidable socioeconomic and healthcare challenges. Small molecules capable of improving the health of older individuals are being explored. Small molecules that enhance cellular stress resistance are a promising avenue to alleviate declines seen in human aging. Tomatidine, a natural compound abundant in unripe tomatoes, inhibits age-related skeletal muscle atrophy in mice. Here we show that tomatidine extends lifespan and healthspan in C. elegans, an animal model of aging which shares many major longevity pathways with mammals...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28389882/hormetic-efficacy-of-rutin-to-promote-longevity-in-drosophila-melanogaster
#15
Debarati Chattopadhyay, Atith Chitnis, Aishwarya Talekar, Prajakta Mulay, Manyata Makkar, Joel James, Kavitha Thirumurugan
Hormetins are compounds that mediate hormesis by being beneficial at low doses but detrimental at high doses. Recent studies have highlighted that many compounds that extended lifespan in model organisms did so by mediating hormesis. Rutin is a glycosylate conjugate of quercetin and rutinose and is abundant in citrus fruits and buckwheat seeds. Rutin possess ROS scavenging, anti-cancer, cardio-protective, skin-regenerative and neuro-protective properties. Drosophila melanogaster is an attractive model organism for longevity studies owing to its homology of organ and cellular-pathways with mammals...
June 2017: Biogerontology
https://www.readbyqxmd.com/read/28344584/lanthanum-affects-bell-pepper-seedling-quality-depending-on-the-genotype-and-time-of-exposure-by-differentially-modifying-plant-height-stem-diameter-and-concentrations-of-chlorophylls-sugars-amino-acids-and-proteins
#16
Atonaltzin García-Jiménez, Fernando C Gómez-Merino, Olga Tejeda-Sartorius, Libia I Trejo-Téllez
Lanthanum (La) is considered a beneficial element, capable of inducing hormesis. Hormesis is a dose-response relationship phenomenon characterized by low-dose stimulation and high-dose inhibition. Herein we tested the effect of 0 and 10 μM La on growth and biomolecule concentrations of seedlings of four sweet bell pepper (Capsicum annuum L.) varieties, namely Sven, Sympathy, Yolo Wonder, and Zidenka. Seedling evaluations were performed 15 and 30 days after treatment applications (dat) under hydroponic greenhouse conditions...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28333578/hormetic-heat-shock-and-hsf-1-overexpression-improve-c-elegans-survival-and-proteostasis-by-inducing-autophagy
#17
Caroline Kumsta, Malene Hansen
The cellular recycling process of macroautophagy/autophagy is an essential homeostatic system induced by various stresses, but it remains unclear how autophagy contributes to organismal stress resistance. In a recent study, we report that a mild and physiologically beneficial ("hormetic") heat shock as well as overexpression of the heat-shock responsive transcription factor HSF-1 systemically increases autophagy in C. elegans. Accordingly, we found HSF-1- and heat stress-inducible autophagy to be required for C...
March 23, 2017: Autophagy
https://www.readbyqxmd.com/read/28319746/predicting-biphasic-responses-in-binary-mixtures-pelargonic-acid-versus-glyphosate
#18
COMPARATIVE STUDY
Regina G Belz, Hans-Peter Piepho
Predicting hormesis in mixtures is challenging, but essential considering that chemical exposures often occur in mixtures and at low doses. This study investigated mixture effects with two herbicides prone to induce hormesis and to interact, namely pelargonic acid versus glyphosate. Five independent mixture experiments were conducted in vitro to assess effects on root growth of lettuce. Mixture effects on the dose were analyzed using classical joint-action models in terms of deviation from the reference model of concentration addition...
July 2017: Chemosphere
https://www.readbyqxmd.com/read/28318788/hormesis-commonly-observed-in-the-assessment-of-aneuploidy-in-yeast
#19
REVIEW
Edward J Calabrese
Extensive dose response studies have assessed the potential of toxic chemical agents to induce aneuploidy in the yeast model. An assessment of such findings revealed that hormetic-like biphasic dose responses were commonly observed. A preliminary estimate of the frequency of the hormetic responses using a priori entry and evaluative criteria was approximately 65-80%.
June 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28287626/using-delaunay-triangulation-and-voronoi-tessellation-to-predict-the-toxicities-of-binary-mixtures-containing-hormetic-compound
#20
Rui Qu, Shu-Shen Liu, Qiao-Feng Zheng, Tong Li
Concentration addition (CA) was proposed as a reasonable default approach for the ecological risk assessment of chemical mixtures. However, CA cannot predict the toxicity of mixture at some effect zones if not all components have definite effective concentrations at the given effect, such as some compounds induce hormesis. In this paper, we developed a new method for the toxicity prediction of various types of binary mixtures, an interpolation method based on the Delaunay triangulation (DT) and Voronoi tessellation (VT) as well as the training set of direct equipartition ray design (EquRay) mixtures, simply IDVequ...
March 13, 2017: Scientific Reports
keyword
keyword
96658
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"