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Hydrogen sulphide

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https://www.readbyqxmd.com/read/29038536/hydrogen-sulphide-treatment-increases-insulin-sensitivity-and-improves-oxidant-metabolism-through-the-camkkbeta-ampk-pathway-in-pa-induced-ir-c2c12-cells
#1
Xubo Chen, Xueyan Zhao, Fazhang Lan, Tao Zhou, Hua Cai, Haiying Sun, Weijia Kong, Wen Kong
Studies have reported attenuation of insulin resistance (IR) by improving phosphorylation of the insulin signalling pathway. However, the upstream molecular signalling pathway is still elusive. In this study, Western blot was used to evaluate the phosphorylation level of the insulin signalling pathway and the AMPK pathway. 2-NBDG was used to evaluate glucose uptake. Ca(2+) imaging was used to assess change of intracellular Ca(2+) concentration. We found that NaHS enhanced the intracellular Ca(2+) concentration and glucose uptake and activated the insulin signalling cascade in a palmitic acid (PA)-induced IR model in C2C12 cells...
October 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29037570/trace-elements-and-arsenic-speciation-in-tissues-of-tube-dwelling-polychaetes-from-hydrothermal-vent-ecosystems-east-pacific-rise-an-ecological-role-as-antipredatory-strategy
#2
Marta Di Carlo, Donato Giovannelli, Daniele Fattorini, Nadine Le Bris, Costantino Vetriani, Francesco Regoli
Hydrothermal vent systems are inhabited by dense benthic communities adapted to extreme conditions such as high temperature, hydrogen sulphide (H2S) and elevated fluxes of metals. In the present work, a wide range of trace elements (Ag, Al, As, Ba, Cd, Co, Cr, Cu, Fe, Hg, Mn, Ni, Pb, Sb, Se, V and Zn) were measured in tissues of three tube dwelling annelids, Alvinella pompejana, Alvinella caudata and Riftia pachyptila, which colonize distinct habitats of the East Pacific Rise (EPR) at 2500 m depth. Metals concentrations in alvinellids were often 2-4 orders of magnitude higher than those commonly found in marine organisms, while much lower values were observed in the vestimentiferan polychaete...
October 5, 2017: Marine Environmental Research
https://www.readbyqxmd.com/read/29020961/hazardous-waste-and-health-impact-a-systematic-review-of-the-scientific-literature
#3
REVIEW
L Fazzo, F Minichilli, M Santoro, A Ceccarini, M Della Seta, F Bianchi, P Comba, M Martuzzi
Waste is part of the agenda of the European Environment and Health Process and included among the topics of the Sixth Ministerial Conference on Environment and Health. Disposal and management of hazardous waste are worldwide challenges. We performed a systematic review to evaluate the evidence of the health impact of hazardous waste exposure, applying transparent and a priori defined methods. The following five steps, based on pre-defined systematic criteria, were applied. 1. Specify the research question, in terms of "Population-Exposure-Comparators-Outcomes" (PECO)...
October 11, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/29017870/biogas-purification-with-biomass-ash
#4
M Fernández-Delgado Juárez, P Mostbauer, A Knapp, W Müller, S Tertsch, A Bockreis, H Insam
The aim of the study was to investigate the option to purify biogas from small-scale biogas plants by entrapping CO2 and H2S with regionally available biomass ash. Connected to the existing biogas plant Neustift (Tyrol) wood ash placed in a 1 m(3) container was used as a trap for CO2 and H2S in the biogas. With the process conditions chosen, for a period of a few hours CO2 was trapped resulting in pure methane. The removal of H2S was much longer-lasting (up to 34 d). The cumulative H2S uptake by the biomass ash ranged from 0...
October 7, 2017: Waste Management
https://www.readbyqxmd.com/read/28977784/exogenous-h2s-protects-against-diabetic-cardiomyopathy-by-activating-autophagy-via-the-ampk-mtor-pathway
#5
Fan Yang, Linxue Zhang, Zhaopeng Gao, Xiaojiao Sun, Miao Yu, Shiyun Dong, Jichao Wu, Yajun Zhao, Changqing Xu, Weihua Zhang, Fanghao Lu
BACKGROUND/AIM: Autophagy plays an important role in cellular homeostasis through the disposal and recycling of cellular components. Hydrogen sulphide (H2S) is the third endogenous gas that has been shown to confer cardiac protective effects. Given the regulation of autophagy in cardioprotection, this study aimed to investigate the protective effects of H2S via autophagy during high glucose treatment. METHODS: This study investigated the content of H2S in the plasma as well as myocardial, ultrastructural changes in mitochondria and autophagosomes...
October 5, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28944326/the-anti-inflammatory-effect-of-hydrogen-sulphide-on-acute-necrotizing-pancreatitis-in-rats
#6
Kutay Sağlam, Etem Alhan, Serdar Türkyılmaz, Birgül Kural Vanizor, Cengiz Erçin
OBJECTIVE: The aim of this study was to investigate the dose-dependent anti-inflammatory effect of the Hydrogen sulfidedonor sodiumhydrosulphide on acute necrotizing pancreatitis in rats. MATERIAL AND METHODS: A total of 42 male Sprague-Dawley rats were divided into 4 groups: sham+saline (group 1), sham+NaHS (group 2), acute necrotizing pancreatitis+saline (group 3), and acute necrotizing pancreatitis+NaHS (group 4). Acute pancreatitis was induced in rats in groups 3 and 4 with the infusion of glycodeoxycholic acidinto the biliopancreatic canal and infusion of cerulein parenterally...
2017: Turk J Surg
https://www.readbyqxmd.com/read/28943473/h2s-is-a-key-antisecretory-molecule-against-cholera-toxin-induced-diarrhoea-in-mice-evidence-for-non-involvement-of-the-ac-camp-pka-pathway-and-ampk
#7
Francisca B M Sousa, Luan K M Souza, Nayara A Sousa, Thiago S L Araújo, Simone de Araújo, Dvison M Pacífico, Irismara S Silva, Renan O Silva, Lucas A D Nicolau, Fabiana M Souza, Marcelo C Filgueiras, Jefferson S Oliveira, Marcellus H L P Souza, Jand Venes R Medeiros
Hydrogen sulphide (H2S) is a gasotransmitter that participates in various physiological and pathophysiological processes within the gastrointestinal tract. We studied the effects and possible mechanism of action of H2S in secretory diarrhoea caused by cholera toxin (CT). The possible mechanisms of action of H2S were investigated using an intestinal fluid secretion model in isolated intestinal loops on anaesthetized mice treated with CT. NaHS and Lawesson's reagent and l-cysteine showed antisecretory activity through reduction of intestinal fluid secretion and loss of Cl(-) induced by CT...
September 21, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28928375/an-efficient-co3s4-cop-hybrid-catalyst-for-electrocatalytic-hydrogen-evolution
#8
Tingting Wang, Liqian Wu, Xiaobing Xu, Yuan Sun, Yuanqi Wang, Wei Zhong, Youwei Du
The development of efficient, universal and inexpensive electrocatalysts for hydrogen evolution reaction (HER) is central to the area of sustainable energy conversion. Considering the Co-based sulfides/phosphides have the same catalytic mechanism with the hydrogenases occurring in nature. Here, a new catalyst based on Co3S4/CoP hybrid that is comprised entirely cheap and earthabundant elements, was first synthesized via a two-step method, the Co(CO3)0.5(OH)·0.11H2O precursor was prepared by a hydrothermal method, followed by phosphidation and sulphidation under Ar atmosphere simultaneously...
September 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28925377/applied-upper-airway-resistance-instantly-affects-breath-components-a-unique-insight-into-pulmonary-medicine
#9
Pritam Sukul, Jochen Schubert, Svend Kamysek, Phillip Trefz, Wolfram Miekisch
Respiratory parameters such as flow or rate have complex effects onto exhalation of volatile substances and can hamper clinical interpretation of breath biomarkers. We investigated effects of progressively applied upper-airway resistances onto exhalation of volatile organic compounds (VOCs) in healthy humans. We performed real-time mass-spectrometric determination of breath volatiles in 50 subjects with parallel non-invasive hemodynamic monitoring, breath-resolved spirometry and capnometry during controlled tidal breathing (12 breaths/min)...
September 19, 2017: Journal of Breath Research
https://www.readbyqxmd.com/read/28901567/do-penile-haemodynamics-change-in-the-presence-of-hydrogen-sulphide-h2-s-donor-in-metabolic-syndrome-induced-erectile-dysfunction
#10
E Dayar, E Kara, G Yetik-Anacak, N Hocaoglu, O Bozkurt, S Gidener, N Durmus
Erectile dysfunction (ED) is defined in relation to the metabolic syndrome (metS). Hydrogen sulphide (H2 S), a gasotransmitter, has been revealed to get involved in hypertension, insulin secretion and regulation of vascular tone especially in erectile physiology. This study aimed to investigate the effect of H2 S on metS-induced ED. Animals were divided into two groups as control and metS, which were fed with standard diet or 60% high-fructose diet for 10 weeks respectively. The metS model was evaluated with biochemical analyses, waist circumference/tibia length ratio and HOMA index...
September 13, 2017: Andrologia
https://www.readbyqxmd.com/read/28884838/review-article-transient-receptor-potential-channels-as-possible-therapeutic-targets-in-irritable-bowel-syndrome
#11
REVIEW
A B Beckers, Z Z R M Weerts, Z Helyes, A A M Masclee, D Keszthelyi
BACKGROUND: Abdominal pain in irritable bowel syndrome (IBS) remains challenging to treat effectively. Researchers have attempted to elucidate visceral nociceptive processes in order to guide treatment development. Transient receptor potential (TRP) channels have been implied in the generation (TRPV1, TRPV4, TRPA1) and inhibition (TRPM8) of visceral pain signals. Pathological changes in their functioning have been demonstrated in inflammatory conditions, and appear to be present in IBS as well...
September 8, 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28822926/human-exposure-to-hydrogen-sulphide-concentrations-near-wastewater-treatment-plants
#12
Ana Flavia Locateli Godoi, Anderson Marlon Grasel, Gabriela Polezer, Andrew Brown, Sanja Potgieter-Vermaak, Débora Camargo Scremim, Carlos I Yamamoto, Ricardo Henrique Moreton Godoi
The hydrogen sulphide (H2S) levels from wastewater treatment plants (WWTPs) in Curitiba, Brazil have been quantified for the first time. H2S generated by anaerobic decomposition of organic matter in WWTPs is a cause for concern because it is an air pollutant, which can cause eye and respiratory irritation, headaches, and nausea. Considering the requirement for WWTPs in all communities, it is necessary to assess the concentrations and effects of gases such as H2S on populations living and/or working near WWTPs...
January 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/28821266/endogenous-hydrogen-sulphide-attenuates-nlrp3-inflammasome-mediated-neuroinflammation-by-suppressing-the-p2x7-receptor-after-intracerebral-haemorrhage-in-rats
#13
Hengli Zhao, Pengyu Pan, Yang Yang, Hongfei Ge, Weixiang Chen, Jie Qu, Jiantao Shi, Gaoyu Cui, Xin Liu, Hua Feng, Yujie Chen
BACKGROUND: Emerging studies have demonstrated the important physiological and pathophysiological roles of hydrogen sulphide (H2S) as a gasotransmitter for NOD-like receptor family pyrin domain-containing 3 (NLRP3) inflammasome-associated neuroinflammation in the central nervous system. However, the effects of H2S on neuroinflammation after intracerebral haemorrhage (ICH), especially on the NLRP3 inflammasome, remain unknown. METHODS: We employed a Sprague-Dawley rat of collagenase-induced ICH in the present study...
August 18, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28797144/gypsum-in-animal-slurry-systems-enhances-generation-of-hydrogen-sulphide-and-increases-occupational-exposure-hazard
#14
Brian Crook, Stephen Stagg, Alison Bowry, Gillian Frost
Hydrogen sulphide gas (H2S) produced by sulphate reducing bacteria (SRB) in stored animal slurry is highly toxic and, if emitted into poorly ventilated confined spaces, can build up to concentrations capable of causing asphyxiation. Therefore it is important to understand factors influencing H2S emission from slurry. Powdered gypsum (hydrated calcium sulphate) may be used as animal bedding and, if it enters slurry systems, could be metabolised by SRB and further increase H2S generation. Cattle slurry and cattle bedding collected from farms was used in laboratory-scale experiments sealed in 20litre vessels fitted with mechanical stirrers...
December 31, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28796243/exogenous-h2s-facilitating-ubiquitin-aggregates-clearance-via-autophagy-attenuates-type-2-diabetes-induced-cardiomyopathy
#15
Jichao Wu, Zhiliang Tian, Yu Sun, Cuicui Lu, Ning Liu, Zhaopeng Gao, Linxue Zhang, Shiyun Dong, Fan Yang, Xin Zhong, Changqing Xu, Fanghao Lu, Weihua Zhang
Diabetic cardiomyopathy (DCM) is a serious complication of diabetes. Hydrogen sulphide (H2S), a newly found gaseous signalling molecule, has an important role in many regulatory functions. The purpose of this study is to investigate the effects of exogenous H2S on autophagy and its possible mechanism in DCM induced by type II diabetes (T2DCM). In this study, we found that sodium hydrosulphide (NaHS) attenuated the augment in left ventricular (LV) mass and increased LV volume, decreased reactive oxygen species (ROS) production and ameliorated H2S production in the hearts of db/db mice...
August 10, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28777815/biochemical-adaptations-of-four-submerged-macrophytes-under-combined-exposure-to-hypoxia-and-hydrogen-sulphide
#16
Mahfuza Parveen, Takashi Asaeda, Md H Rashid
A hydroponic experiment was performed to investigate the stress responses and biochemical adaptations of four submerged macrophytes, Potamogeton crispus, Myriophyllum spicatum, Egeria densa, and Potamogeton oxyphyllus, to the combined exposure of hypoxia and hydrogen sulfide (H2S, provided by NaHS). The investigated plants were subjected to a control, hypoxia, 0.1mM NaHS, 0.5 mM NaHS, 0.1 mM NaHS+hypoxia and 0.5 mM NaHS+hypoxia conditions. All experimental plants grew optimally under control, hypoxic and NaHS conditions in comparison to that grown in the combined exposure of hypoxia and hydrogen sulfide...
2017: PloS One
https://www.readbyqxmd.com/read/28760322/cytochrome-bd-and-gaseous-ligands-in-bacterial-physiology
#17
Elena Forte, Vitaliy B Borisov, João B Vicente, Alessandro Giuffrè
Cytochrome bd is a unique prokaryotic respiratory terminal oxidase that does not belong to the extensively investigated family of haem-copper oxidases (HCOs). The enzyme catalyses the four-electron reduction of O2 to 2H2O, using quinols as physiological reducing substrates. The reaction is electrogenic and cytochrome bd therefore sustains bacterial energy metabolism by contributing to maintain the transmembrane proton motive force required for ATP synthesis. As compared to HCOs, cytochrome bd displays several distinctive features in terms of (i) metal composition (it lacks Cu and harbours a d-type haem in addition to two haems b), (ii) overall three-dimensional structure, that only recently has been solved, and arrangement of the redox cofactors, (iii) lesser energetic efficiency (it is not a proton pump), (iv) higher O2 affinity, (v) higher resistance to inhibitors such as cyanide, nitric oxide (NO) and hydrogen sulphide (H2S) and (vi) ability to efficiently metabolize potentially toxic reactive oxygen and nitrogen species like hydrogen peroxide (H2O2) and peroxynitrite (ONOO(-))...
2017: Advances in Microbial Physiology
https://www.readbyqxmd.com/read/28751723/hydrogen-sulphide-donors-selectively-potentiate-a-green-tea-polyphenol-egcg-induced-apoptosis-of-multiple-myeloma-cells
#18
Jaehoon Bae, Motofumi Kumazoe, Shuya Yamashita, Hirofumi Tachibana
Hydrogen sulphide (H2S) is a colourless gas with the odour of rotten eggs and has recently been recognized as a signal mediator in physiological activities related with the regulation of homeostasis, the vascular system and the inflammatory system. Here we show that H2S donors, including sodium hydrogen sulphide (NaHS), GYY 4137 and diallyltrisulfide (DATS), synergistically enhanced the anti-cancer effect of a green tea polyphenol (-)-epigallocatechin-3-O-gallate (EGCG) against multiple myeloma cells without affecting normal cells...
July 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28727160/the-long-term-effect-of-a-zinc-acetate-and-chlorhexidine-diacetate-containing-mouth-rinse-on-intra-oral-halitosis-a-randomized-clinical-trial
#19
Seida Erovic Ademovski, Carina Mårtensson, Gösta Rutger Persson, Stefan Renvert
AIM: To evaluate the long-term effects of a zinc acetate and chlorhexidine diacetate mouth rinse (Zn/CHX) on intra-oral halitosis. MATERIALS AND METHODS: Forty-six adults with intra-oral halitosis were randomized into a 6-month, double-blind, placebo-controlled clinical study. The presence of intra-oral halitosis was evaluated at baseline, 3 and 6 months after treatment by assessment of organoleptic score (OLS) and by total volatile sulphur compounds (T-VSC), hydrogen sulphide (H2 S) and methyl mercaptan (MM) concentrations in exhaled air...
July 20, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28718462/-preventive-dentistry-7-getting-rid-of-halitosis
#20
T M H de Jong, M L Laine
Halitosis or bad breath is a problem that affects many people and its source is generally found in the oral cavity (intra-oral halitosis). Bacteria in the oral cavity produce volatile sulphur compounds such as hydrogen sulphide and methyl mercaptan that not only emit an unpleasant odour, but may also have toxic effects on the periodontal tissues. Good oral hygiene, a healthy periodontium and healthy teeth are the basis for the prevention of intra-oral halitosis and dentists and dental hygienists therefore play an essential role in its prevention...
July 2017: Nederlands Tijdschrift Voor Tandheelkunde
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