keyword
MENU ▼
Read by QxMD icon Read
search

H2s

keyword
https://www.readbyqxmd.com/read/28088960/-role-and-mechanism-of-hydrogen-sulfide-in-cigarette-smoke-induced-chronic-obstructive-pulmonary-disease-related-pulmonary-vascular-remodeling-in-rats
#1
M X Li, Y H Chen, C C Liao, F Lin, Y Bai, W J Mi, Y Sun, Y F Qi
Objective: To investigate the role and mechanism of hydrogen sulfide (H2S) in rats with chronic obstructive pulmonary disease (COPD) related pulmonary vascular remodeling. Methods: Twenty four healthy male Sprague-Dawley rats were randomly divided into 4 groups: control group, cigarette smoke (CS) group, CS+ Sodium hydrosulfide (NaHS) group and CS+ DL-propargylglycine (PPG) group. Rats in control group were fed normally and breathed clear air, and for the rest groups, passive cigarette smoke inhalation method were adopted to establish COPD model...
January 10, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28088675/involvement-of-water-channel-aquaporin-5-in-h2s-induced-pulmonary-edema
#2
Chunyang Xu, Lei Jiang, Yuxia Zou, Jingjing Xing, Hao Sun, Baoli Zhu, Hengdong Zhang, Jun Wang, Jinsong Zhang
Acute exposure to hydrogen sulfide (H2S) poses a significant threat to life, and the lung is one of the primary target organs of H2S. However, the mechanisms involved in H2S-induced acute pulmonary edema are poorly understood. This study aims to investigate the effects of H2S on the expression of water channel aquaporin 5 (AQP5) and to elucidate the signaling pathways involved in AQP5 regulation. In an in vivo study, C57BL6 mice were exposed to sub-lethal concentrations of inhaled H2S, and histological injury of the lungs and ultrastructure injury of the epithelial cells were evaluated...
December 30, 2016: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28088150/optimal-orientation-of-an-asymmetric-top-molecule-with-terahertz-pulses
#3
L H Coudert
Terahertz pulses effects are investigated in an asymmetric top C2v molecule using numerical simulations. The average value of the direction cosine ΦZx is computed solving the time dependent Schrödinger equation for several types of pulses. The H2S molecule taken as a test case is first subject to two short terahertz pulses with a duration smaller than 5 ps, an identical maximum value of the electric field of 2 MV/cm, but a different shape. The thermal average ⟨⟨ΦZx⟩⟩ is calculated for several temperatures, and non-periodic time variations are found even for the lowest temperature...
January 14, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28087442/hydrogen-sulfide-protects-against-endoplasmic-reticulum-stress-and-mitochondrial-injury-in-nucleus-pulposus-cells-and-ameliorates-intervertebral-disc-degeneration
#4
Daoliang Xu, Haiming Jin, Jianxia Wen, Jiaoxiang Chen, Deheng Chen, Ningyu Cai, Yongli Wang, Jianle Wang, Yu Chen, Xiaolei Zhang, Xiangyang Wang
It has been suggested that excessive apoptosis in intervertebral disc cells induced by inflammatory cytokines, such as interleukin (IL)-1β, is related to the process of intervertebral disc degeneration (IVDD). Hydrogen sulfide (H2S), a gaseous signaling molecule, has drawn attention for its anti-apoptosis role in various pathophysiological processes in degenerative diseases. To date, there has been no investigation of the correlation of H2S production and IVDD or of the effects of H2S on IL-1β-induced apoptosis in nucleus pulposus (NP) cells...
January 10, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28081454/study-of-the-adsorption-and-electroadsorption-process-of-cu-ii-ions-within-thermally-and-chemically-modified-activated-carbon
#5
A Macías-García, M Gómez Corzo, M Alfaro Domínguez, M Alexandre Franco, J Martínez Naharro
The aim of this work is to modify the porous texture and superficial groups of a commercial activated carbon through chemical and thermal treatment and subsequently study the kinetics of adsorption and electroadsorption of Cu (II) ion for these carbons. Samples of three activated carbons were used. These were a commercial activated carbon, commercial activated carbon modified thermically (C-N2-900) and finally commercial activated carbon modified chemically C-SO2-H2S-200. The activated carbons were characterized chemically and texturally and the electrical conductivity of them determined...
November 23, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28079151/discovery-and-mechanistic-characterization-of-selective-inhibitors-of-h2s-producing-enzyme-3-mercaptopyruvate-sulfurtransferase-3mst-targeting-active-site-cysteine-persulfide
#6
Kenjiro Hanaoka, Kiyoshi Sasakura, Yusuke Suwanai, Sachiko Toma-Fukai, Kazuhito Shimamoto, Yoko Takano, Norihiro Shibuya, Takuya Terai, Toru Komatsu, Tasuku Ueno, Yuki Ogasawara, Yukihiro Tsuchiya, Yasuo Watanabe, Hideo Kimura, Chao Wang, Masanobu Uchiyama, Hirotatsu Kojima, Takayoshi Okabe, Yasuteru Urano, Toshiyuki Shimizu, Tetsuo Nagano
Very recent studies indicate that sulfur atoms with oxidation state 0 or -1, called sulfane sulfurs, are the actual mediators of some physiological processes previously considered to be regulated by hydrogen sulfide (H2S). 3-Mercaptopyruvate sulfurtransferase (3MST), one of three H2S-producing enzymes, was also recently shown to produce sulfane sulfur (H2Sn). Here, we report the discovery of several potent 3MST inhibitors by means of high-throughput screening (HTS) of a large chemical library (174,118 compounds) with our H2S-selective fluorescent probe, HSip-1...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28076463/in-vitro-effects-of-melaleuca-alternifolia-essential-oil-on-growth-and-production-of-volatile-sulphur-compounds-by-oral-bacteria
#7
Talita Signoreti Graziano, Caroline Morini Calil, Adilson Sartoratto, Gilson César Nobre Franco, Francisco Carlos Groppo, Karina Cogo-Müller
Objective: Halitosis can be caused by microorganisms that produce volatile sulphur compounds (VSCs), which colonize the surface of the tongue and subgingival sites. Studies have reported that the use of natural products can reduce the bacterial load and, consequently, the development of halitosis. The aim of this study was to evaluate the antimicrobial activity of the essential oil of Melaleuca alternifolia on the growth and volatile sulphur compound (VSC) production of oral bacteria compared with chlorhexidine...
November 2016: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28074971/bio-orthogonal-click-and-release-donation-of-caged-carbonyl-sulfide-cos-and-hydrogen-sulfide-h2s
#8
Andrea K Steiger, Yang Yang, Maksim Royzen, Michael D Pluth
Hydrogen sulfide (H2S) is an important biomolecule with high therapeutic potential. Here we leverage the inverse-electron demand Diels-Alder (IEDDA) click reaction between a thiocarbamate-functionalized trans-cyclooctene and a tetrazine to deliver carbonyl sulfide (COS), which is quickly converted to H2S by the uniquitous enzyme carbonic anhydrase (CA), thus providing a new strategy for bio-orthogonal COS/H2S donation.
January 11, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28070795/td-dft-study-of-absorption-and-emission-spectra-of-2-2-aminophenyl-benzothiazole-derivatives-in-water
#9
Natthaporn Manojai, Rathawat Daengngern, Khanittha Kerdpol, Nawee Kungwan, Chanisorn Ngaojampa
Reduction of aromatic azides to amines is an important property of hydrogen sulphide (H2S) which is useful in fluorescence microscopy and H2S probing in cells. The aim of this work is to study the substituent effect on the absorption and emission spectra of 2-(2'-aminophenyl)benzothiazole (APBT) in order to design APBT derivatives for the use of H2S detection. Absorption and emission spectra of APBT derivatives in aqueous environment were calculated using density functional theory (DFT) and time-dependent DFT (TD-DFT) at B3LYP/6-311+G(d,p) level...
January 9, 2017: Journal of Fluorescence
https://www.readbyqxmd.com/read/28070577/sulfur-dioxide-prodrugs-triggered-release-of-so2via-a-click-reaction
#10
Wenyi Wang, Xingyue Ji, Zhenming Du, Binghe Wang
Sulfur dioxide (SO2) is being recognized as a possible endogenous gasotransmitter with importance on par with that of NO, CO, and H2S. Herein we describe a series of SO2 prodrugs that are activated for SO2 release via a bioorthogonal click reaction. The release rate can be tuned by adjusting the substituents on the prodrug.
January 10, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28069557/h2s-as-a-possible-therapeutic-alternative-for-the-treatment-of-hypertensive-kidney-injury
#11
REVIEW
George J Dugbartey
Hypertension is the most common cause of cardiovascular morbidities and mortalities, and a major risk factor for renal dysfunction. It is considered one of the causes of chronic kidney disease, which progresses into end-stage renal disease and eventually loss of renal function. Yet, the mechanism underlying the pathogenesis of hypertension and its associated kidney injury is still poorly understood. Moreover, despite existing antihypertensive therapies, achievement of blood pressure control and preservation of renal function still remain a worldwide public health challenge in a subset of hypertensive patients...
January 6, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28068782/gasotransmitter-heterocellular-signaling
#12
Gopi Kolluru, Shuai Yuan, XInggui Shen, Christopher G Kevil
SIGNIFICANCE: The family of gasotransmitter molecules nitric oxide (NO), carbon monoxide (CO), and hydrogen sulfide (H2S), has emerged as important mediators of numerous cellular signal transduction and pathophysiological responses. As such, these molecules have been reported to influence a diverse array of biochemical, molecular, and cell biology events often impacting one another. Recent Advances: Discrete regulation of gasotransmitter molecule formation, movement, and reaction are critical to their biological function...
January 9, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28067517/temperature-dependent-rate-coefficients-for-the-reaction-of-ch2oo-with-hydrogen-sulfide
#13
Mica C Smith, Wen Chao, Manoj Kumar, Joseph S Francisco, Kaito Takahashi, Jim Jr-Min Lin
The reaction of the simplest Criegee intermediate CH2OO with hydrogen sulfide was measured with transient UV absorption spectroscopy in a temperature-controlled flow reactor, and bimolecular rate coefficients were obtained from 278 to 318 K and from 100 to 500 Torr. The average rate coefficient at 298 K and 100 Torr was (1.7±0.2)×10(-13) cm(3) s(-1). The reaction was found to be independent of pressure and exhibited a weak negative temperature dependence. Ab initio quantum chemistry calculations of the temperature-dependent reaction rate coefficient at the QCISD(T)/CBS level are in reasonable agreement with the experiment...
January 9, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28067226/syntrophic-anaerobic-photosynthesis-via-direct-interspecies-electron-transfer
#14
Phuc T Ha, Stephen R Lindemann, Liang Shi, Alice C Dohnalkova, James K Fredrickson, Michael T Madigan, Haluk Beyenal
Microbial phototrophs, key primary producers on Earth, use H2O, H2, H2S and other reduced inorganic compounds as electron donors. Here we describe a form of metabolism linking anoxygenic photosynthesis to anaerobic respiration that we call 'syntrophic anaerobic photosynthesis'. We show that photoautotrophy in the green sulfur bacterium Prosthecochloris aestaurii can be driven by either electrons from a solid electrode or acetate oxidation via direct interspecies electron transfer from a heterotrophic partner bacterium, Geobacter sulfurreducens...
January 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/28062279/nitric-oxide-induced-synthesis-of-hydrogen-sulfide-alleviates-osmotic-stress-in-wheat-seedlings-through-sustaining-antioxidant-enzymes-osmolyte-accumulation-and-cysteine-homeostasis
#15
M Nasir Khan, M Mobin, Zahid Khorshid Abbas, Manzer H Siddiqui
Nitric oxide (NO) and hydrogen sulfide (H2S) have been shown to act as signaling molecules in various physiological processes, play significant roles in plant cellular processes, and also mediate responses to both biotic and abiotic stresses in plants. The present investigation was carried out to test the effect of exogenous NO on endogenous synthesis of H2S in osmotic-stressed wheat (Triticum aestivum L.) seedlings. The results show that application of NO to wheat seedlings, suffered from PEG8000-induced osmotic stress, considerably enhanced the activities of H2S-synthesizing enzymes l-cysteine desulfhydrase (LCD) and d-cysteine desulfhydrase (DCD) leading to enhanced level of endogenous H2S content...
January 3, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28061934/dynamic-modeling-of-hydrogen-sulfide-within-enclosed-environments-in-biosolids-recovery-facilities
#16
Rita Ventura Matos, Natércia Matias, Filipa Ferreira, José Saldanha Matos
  Hydrogen sulfide emissions from wastewater affect human health and equipment durability, thus presenting a complex issue for utilities. Several VOC emission models have been used before to predict H2S in collection systems and water resources recovery operations, even if with restrictions. By contrast, fewer studies focus on biosolids emissions and modelling. This paper presents a dynamic modelling approach to predict H2S concentration in a tank headspace of a wastewater biosolids recovery facility. Data from one of the largest Portuguese water resources recovery facilities was collected under different facility operating modes...
December 1, 2016: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/28060500/endogenous-hydrogen-sulfide-homeostasis-is-responsible-for-the-alleviation-of-senescence-of-postharvest-daylily-flower-via-increasing-antioxidant-capacity-and-maintaining-energy-status
#17
Dan Liu, Sheng Xu, Hua-Li Hu, Jincheng Pan, Pengxia Li, Wen-Biao Shen
There are limited data concerning the role of endogenous H2S in prolonging postharvest of vegetables and fruits. By using fluorescence microscope with a specific probe, we discovered that during the senescence of postharvest daylily flower, endogenous H2S homeostasis was impaired. The activities of two important synthetic enzymes of H2S, L-cysteine desulfhydrase (LCD) and D-cysteine desulfhydrase (DCD), exhibited decreasing tendencies. By contrast, NaHS (a H2S donor) not only blocked above decreased H2S production, but also extended postharvest life of daylily...
January 6, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28057188/hydrogen-sulfide-as-a-double-faced-compound-one-with-pro-and-antioxidant-effect
#18
B Olas
Hydrogen sulfide (H2S), like other gasotransmitters such as nitric oxide (NO(•)) and carbon monoxide (CO), acts as a signaling molecule in various biological systems. It may also regulate the oxidative stress observed in several diseases sometimes associated with changes of H2S concentration. This chapter describes the "double face" of hydrogen sulfide as both an antioxidant and a prooxidant in biological systems. One proposed mechanism by which H2S exerts its antioxidative effects is its ability to modulate the concentration of glutathione, which is a very important physiological antioxidant...
2017: Advances in Clinical Chemistry
https://www.readbyqxmd.com/read/28051338/activity-dependent-sulfhydration-signal-controls-nmdar-dependent-synaptic-plasticity-via-increasing-d-serine-availability
#19
Yuan-Long Li, Pei-Fei Wu, Jian-Guo Chen, Sheng Wang, Qian-Qian Han, Dan Li, Wen Wang, Xin-Lei Guan, Di Li, Li-Hong Long, Jian-Geng Huang, Fang Wang
AIMS: Reactive sulfur species (RSS) including hydrogen sulfide (H2S) and its oxydates have been raised as novel redox signaling molecules. The present study aimed at examining whether endogenous sulfhydration signal are required for long-term potentiation (LTP), a cellular model for memory. RESULTS: Here, we found that increased synaptic activity triggered sulfide generationand protein sulfhydration. Activity-triggered sulfide production was essential for N-methyl-D-aspartate subtype glutamate receptors (NMDARs)-dependent LTP via maintaining the availability of D-serine, a primary co-agonist for synaptic NMDARs...
January 4, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28049995/clinical-implication-of-plasma-hydrogen-sulfide-levels-in-japanese-patients-with-type-2-diabetes
#20
Kunihiro Suzuki, Masaaki Sagara, Chie Aoki, Seiichi Tanaka, Yoshimasa Aso
Objective The goal of the present study was to investigate the plasma hydrogen sulfide (H2S) levels in patients with type 2 diabetes, as the plasma H2S levels in Japanese patients with type 2 diabetes remain unclear. Methods The plasma H2S levels were measured in 154 outpatients with type 2 diabetes and 66 outpatients without diabetes. All blood samples were collected in the outpatient department from 09:00 to 10:00. The patients had fasted from 21:00 the previous evening and had not consumed alcohol or caffeine or smoked until sample collection...
2017: Internal Medicine
keyword
keyword
65078
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"