Effect of exogenous hydrogen sulfide on hypoxia/reoxygenation injury in glomerular mesangial cells and its mechanism / 中国药理学通报

Aim To explore the effect of exogenous hydrogen sulfide ( H2 S ) on hypoxia/reoxygenation ( H/R) injury in glomerular mesangial cells and elucidate its relevant mechanism. Methods H/R induced mouse mesangial cell line ( SV40MES13 ) to establish cell damage model. Cell viability was detected by cell proliferation kit ( CCK8 ), the content of H

Halitosis: a conceptual, etiologic and therapeutic approach / Halitose: uma abordagem conceitual, etiológica e terapêutica

Objective: Halitosis is the offensive odor emanated by the oral and nasal cavities and perceived by the individual and/or by other people. Halitosis is a symptom that directly impacts on the social aspects of an individual's life and may be a sign for a systemic disorder in some cases. Material and Methods: A search was conducted on the literature in order to gather the main aspects about halitosis and make a review about the main features necessary to the clinical practice when a professional deals with a patient with halitosis. Results: The information was summarized and discussed with a focus on what clinicians should be aware of when dealing with a patient with halitosis. Conclusion: Halitosis is a prevalent symptom that affects approximately 25% of the individuals. Its classification takes into consideration the origin of the compounds producing the malodor. The diagnosis must take into consideration the various etiological possibilities before defining the treatment. The treatment must be focused on the cause and since there is a wide range of possible causes, halitosis needs a multidisciplinary approach (AU)

Objetivo: Halitose é um cheiro ofensivo expelido pela cavidade bucal e pela cavidade nasal e percebido pelo indivíduo e/ou pelas outras pessoas. A halitose é um sintoma que impacta diretamente aspectos sociais da vida de um indivíduo e pode ser um sinal de alguma desordem sistêmica em alguns casos. Material e Métodos: Uma busca foi feita na literatura para reunir os principais aspectos da halitose e conduzir uma revisão sobre as principais características necessárias à prática clínica quando um profissional lida com um paciente com a queixa de halitose. Resultados: A informação disponível foi sumarizada e discutida com foco naquilo que um clínico deve estar atento quando lida com um paciente com a queixa de halitose presente. Conclusão: A halitose é um sintoma prevalente que afeta aproximadamente 25% dos indivíduos. Sua classificação leva em consideração a origem dos compostos que produzem o mau hálito. O diagnóstico deve levar em conta as várias etiologias possíveis antes de definir um tratamento. O tratamento deve ser focado na causa e, como há uma ampla variedade de possíveis causas, a halitose é um sintoma que precisa de uma abordagem multidisciplina (AU)

Advances in fluorescence probes for detection of hydrogen polysulfides / 中国药科大学学报

@#Sulfane sulfur species in the reactive sulfur species family include hydrogen polysulfides (H2Sn, n ≥2), which play an essential role in physiological regulation and signal transduction. As a redox pair of H2S, H2Sn can be produced through oxidation or enzyme reaction and regulate protein interaction and enzyme activity.Research has revealed that H2Sn, with higher efficiency of protein S-sulfhydration than H2S, may be responsible for some physiological functions previously attributed to H2S.Therefore, real-time detection of H2Sn is crucial for studying its physiological activity and the relationship between H2S and H2Sn.Traditional detection methods, such as mass spectrometry, are not suitable for living organisms as they require tissue cell disruption.Instead, fluorescence probes are often used for in situ real-time detection due to their high sensitivity and specificity and low biological toxicity.This review summarizes the physiological regulatory activity of H2Sn, as well as the design strategy, response mechanism, fluorescence characteristics, and biological applications of H2Sn fluorescent probes based on the structure of the response group, with a prospect of the challenges and developments in this field.

The Molecular Mechanism of Anti-aging Effects of Hydrogen Sulfide / 中国生物化学与分子生物学报

Aging contributes to age-related diseases such as cardiovascular diseases, diabetes, and Alzheimer’s disease, which are characterized by imbalance of protein homeostasis, accumulation of oxidative damage, stem cell failure, altered intercellular communication, chronic inflammation, and micro-ecological disorders. It is well known that hydrogen sulfide(H

Gasotransmitters: Novel Roles of Ancient Gases in the Plant Response to Temperature Stress / 中国生物化学与分子生物学报

Gas molecules including hydrogen sulfide, nitric oxide, carbon monoxide, ethylene, hydrogen gas, ammonia, methane, hydrogen cyanide, and sulfur dioxide were the main components of primitive atmosphere on the earth four billion years ago. Nowadays, these gases are viewed as gasotransmitters (GTs) in organisms, namely endogenously gaseous molecules. GTs not only regulate many physiological and pathological processes, such as breathing, blood pressure, learning, memory, and the inflammatory response in animals, but also play a key role in the stomatal movement, seed germination, plant growth, development, and response to environmental stress. In this review, we cover the current progress on the metabolism of GTs, their response to temperature stress in plants, and their general characteristics, anabolism, catabolism. In addition, we highlight the key role of the antioxidant system, the osmoregulation system, the ion balance system, the water balance system, heat shock proteins, post-translational modifications, and re-establishment and repair of biomembranes in the mitigation of oxidative stress, osmotic stress, ion stress, water stress, protein denaturation, and biomembrane injury induced by temperature stress. The alleviation of these injuries could increase the resistance of plants to high temperature and low temperature stresses. Furthermore, we summarize the interactions among GTs by initiating chemical reaction, regulating metabolic enzymes, competing target molecules, and triggering new signaling to modulate temperature stress tolerance in plants. The aim of this review is to drive the rapid progress on GTs in the field of plant biology in the future.

Hydrogen Sulfide Regulates the Response to Oxidative Stress in Plants / 中国生物化学与分子生物学报

Oxidative stress is a state of redox imbalance, and it easily leads to oxidative damage in an organism. The main mechanism of oxidative stress is to regulate the redox balance by activating the antioxidant system. As an important signaling molecule, hydrogen sulfide(H

Neuroprotective effect of exogenous hydrogen sulfide and the expression of matrix metalloproteinases-9 and Caspase-1 in mice model of Parkinson’s disease / 解剖学报

[Abstract] Objective To investigate the protective effect of exogenous hydrogen sulfide (H

Establishment and verification of method for detection of hydrogen sulfide in organs by fluorescent probe method / 中国药理学通报

Aim To rapidly prepare and purify hydrogen sulfide specific fluorescent probe (WSP-5), establish and optimize the fluorescent probe method for the determination of hydrogen sulfide in animal tissues, and verify the applicability of the method in the model of malignant pleural effusion. Methods The preparation solvent of fluorescent probe reaction solution, DMSO addition volume, pH, reaction solution solvent and reaction solution volume, sample pretreatment temperature, grinding times, and standing time after grinding were investigated. The mouses model of malignant pleural effusion was established with S-180 ascites tumor cells, and the concentration of hydrogen sulfide in various organs and tissues of the model animal was measured. Results After optimization, silica gel and dextran gel were used as stationary phases, dichloromethane methanol formic acid (60: 1: 0.1, V/V/V) and dichloromethane methanol (1: 1, V/V) were used as eluents for separation and purification, and the first eluting component was taken to prepare WSP-5 with a purity of more than 700 mg. Animal tissue samples and sodium hydrosulfide standard solution were added with 5 times of cold reaction solution, after low temperature vibration grinding, highspeed centrifugation, the supernatant was incubated in dark for 12 hours, the fluorescence intensity was measured by fluorescent microplate reader. Hydrogen sulfide concentration was calculated according to the standard curve. The LOD of this method was about 0. 6 |JLmol • L

Hollow copper sulfide nanoparticles carrying ISRIB for the sensitized photothermal therapy of breast cancer and brain metastases through inhibiting stress granule formation and reprogramming tumor-associated macrophages

As known, the benefits of photothermal therapy (PTT) are greatly limited by the heat tolerance of cancer cells resulting from overexpressed heat shock proteins (HSPs). Then HSPs further trigger the formation of stress granules (SGs) that regulate protein expression and cell viability under various stress conditions. Inhibition of SG formation can sensitize tumor cells to PTT. Herein, we developed PEGylated pH (low) insertion peptide (PEG-pHLIP)-modified hollow copper sulfide nanoparticles (HCuS NPs) encapsulating the SG inhibitor ISRIB, with the phase-change material lauric acid (LA) as a gate-keeper, to construct a pH-driven and NIR photo-responsive controlled smart drug delivery system (IL@H-PP). The nanomedicine could specifically target slightly acidic tumor sites. Upon irradiation, IL@H-PP realized PTT, and the light-controlled release of ISRIB could effectively inhibit the formation of PTT-induced SG to sensitize tumor cells to PTT, thereby increasing the antitumor effect and inducing potent immunogenic cell death (ICD). Moreover, IL@H-PP could promote the production of reactive oxygen species (ROS) by tumor-associated macrophages (TAMs), repolarizing them towards the M1 phenotype and remodeling the immunosuppressive microenvironment. In vitro/vivo results revealed the potential of PTT combined with SG inhibitors, which provides a new paradigm for antitumor and anti-metastases.

Study on inhibitory effect and mechanism of hydrogen sulfide on the proliferation of cardiac fibroblasts / 中国药房

OBJECTIVE To investigate the inhibitory effect and the possible mechanism of hydrogen sulfide （H2S） on the proliferation of cardiac fibroblasts. METHODS The heart of neonatal SD rats was collected， and cardiac fibroblasts were separated with differential centrifugation. Using sodium hydrosulfide as the donor of H2S， the effects of H2S on the proliferation of cardiac fibroblasts induced by angiotensin Ⅱ （Ang Ⅱ）， hydroxyproline content and the expression of sirtuin 3 （SIRT3） protein were detected. After SIRT3 knockdown with siRNA technology， the effects of H2S on the proliferation of cardiac fibroblasts induced by Ang Ⅱ， hydroxyproline content， the expressions of collagen Ⅰ （Col Ⅰ）， collagen Ⅲ （Col Ⅲ ） and optic atrophy protein 1 （OPA1） were detected. RESULTS H2S could inhibit the proliferation of Ang Ⅱ-induced cardiac fibroblasts， reduce the content of hydroxyproline and increase the expression of SIRT3 （P＜0.05）. After down-regulating the expression of SIRT3 with siRNA technology， the inhibition of H2S on the proliferation of Ang Ⅱ-induced cardiac fibroblasts and the reduction of hydroxyproline content were both inhibited， and the effect of H2S on reducing the expression of Col Ⅰ and Col Ⅲ and enhancing the expression of OPA1 was also significantly weakened. CONCLUSIONS H2S inhibits the proliferation of Ang Ⅱ -induced cardiac fibroblasts through increasing the expression of SIRT3.

Co-administration of sodium hydrosulfide and tadalafil modulates hypoxia and oxidative stress on bladder dysfunction in a rat model of bladder outlet obstruction

ABSTRACT Purpose: This study aimed to assess the possible healing effect of combination treatment with a hydrogen sulfide (H2S) donor, sodium hydrosulfide (NaHS) plus tadalafil on partial bladder outlet obstruction (PBOO)-induced bladder dysfunction. Materials and Methods: A total of 75 male Sprague-Dawley rats aged 10-wk and 300-350g were divided into five groups; control; PBOO; PBOO+NaHS (5.6mg/kg/day, i.p., 6-wk); PBOO+tadalafil (2mg/kg/day, oral, 6-wk) and PBOO+NaHS+tadalafil. PBOO was created by partial urethral ligation. 6 weeks after obstruction, the in vitro contractile responses of the detrusor muscle and Western blotting, H2S and malondialdehyde assay were performed in bladder tissues. Results: There was an increase in bladder weight(p<0.001) and a decrease in contractile responses to KCl (p<0.001), carbachol (p<0.01), electrical field stimulation (p<0.05) and ATP (p<0.001) in the detrusor smooth muscle of obstructed rats which was normalized after the combination treatment. Cystathionine γ-lyase and cystathionine β-synthase, and nuclear factor kappa B protein levels did not significantly differ among groups. The obstruction induced decrement in 3-mercaptopyruvate sulfur transferase protein expression(p<0.001) and H2S levels(p<0.01) as well as increment in protein expressions of neuronal nitric oxide synthase (NO, p<0.001), endothelial NOS (p<0.05), inducible NOS(p<0.001), hypoxia-inducible factor 1-alpha (p<0.01), and malondialdehyde levels (p<0.01), when combined treatment entirely normalized. Conclusions: Combination therapy has beneficial effects on bladder dysfunction via regulating both H2S and nitric oxide pathways as well as downregulation of oxidative stress and hypoxia. The synergistic effect of H2S and nitric oxide is likely to modulate bladder function, which supports the combined therapy for enhancing clinical outcomes in men with BPH/LUTS.

Hydrogen sulfide protects against contrast-induced acute kidney injury via regulation of NLRP3 inflammasome / 中华肾脏病杂志

Objective:To investigate the level of endogenous hydrogen sulfide (H 2S) in contrast-induced acute kidney injury (CIAKI), as well as the potential role of H 2S against CIAKI by down-regulating NLRP3 inflammasome. Methods:Twenty-four healthy male Sprague-Dawley rats, weighing 180-220 g, were randomly divided into three groups according to the random number table method: control group, CIAKI group (iopromide 2.9 g/kg) and CIAKI+NaHS group (NaHS 4 mg/kg for three days before 2.9 g/kg iopromide injection). Kidneys were collected for whole-genome sequencing and bioinformatic analysis. HE and PAS staining were used for kidney histological examination. TUNEL assays were applied to detect renal tubular epithelial injury. Expressions of NLRP3 inflammasome (NLRP3, ASC and caspase-1) were evaluated by immunofluorescence staining. The role of H 2S in contrast (iopromide 200 mgI/kg)-induced injury on human renal tubular epithelium (HK-2 cells) was investigated, and CCK-8 assay was used to detect cellular viability. Results:Compared with the control group, the expression of endogenous H 2S synthetases-related genes [cystathionine β-synthase ( CBS), cystathionine-γ-lyase ( CSE) and 3-mercaptopyruvate sulfurtransferase ( 3- MST)] was lower in CIAKI group (all P<0.05). The gene expression levels of CBS, CSE and 3- MST were negatively correlated with renal function biomarkers serum creatinine, blood urea nitrogen and cystatin-C (all P<0.05). Compared with the CIAKI group, CIAKI+NaHS group showed alleviated creatinine, blood urea nitrogen and cystatin-C, improved histological changes, reduced apoptosis. Moreover, the expression levels of NLRP3, ASC and caspase-1 in CIAKI+NaHS group were lower than those in CIAKI group (all P<0.05). In HK-2 cells, compared with the contrast group, the cellular viability was higher in the contrast+NaHS group; reducing endogenous H 2S by CBS inhibitor could enhance contrast-induced cell viability ( P<0.05). Conclusions:Injury of endogenous H 2S system is pivotal to CIAKI pathogenesis. Up-regulation of H 2S ameliorates renal injury of CIAKI rats, which may be related to regulation of NLRP3 inflammasome.

Research progress on the regulation of glucose metabolism by hydrogen sulfide / 中华内分泌代谢杂志

Diabetes mellitus (DM) is a disease with multiple chronic metabolic complications characterized by high glucose concentration. The incidence of diabetes mellitus is increasing, but its specific mechanisms of pathogenesis have not been fully elucidated. Hydrogen sulfide (H 2S), as a new member of the gasotransmitter family, is closely related to the regulation of glucose metabolism. Therefore, this review emphatically summarized the production of endogenous H 2S and the mechanisms involved in the regulation of glucose metabolism by H 2S, aiming to provide new directions and perspectives for the research of diabetes mellitus.

Research progress on toxic mechanisms of cadmium sulfide nanomaterials / 上海预防医学

Cadmium sulfide nanoparticles are a new type of semiconductor nanomaterials used in many applications. Studies have shown that cadmium sulfide nanoparticles have toxic effects on the reproductive system， liver， and kidney of the body， and the toxicities are affected by various factors. This paper summarized the current research on the toxicity of cadmium sulfide nanoparticles at home and abroad， and reviewed the latest research progress on the mechanisms of its toxic effects and influencing factors.

Xuebijing Injection Ameliorates H / 中国结合医学杂志

OBJECTIVE@#To investigate the protective effects and underlying mechanisms of Xuebijing Injection (XBJ) on the lung endothelial barrier in hydrogen sulfide (H@*METHODS@#Sprague-Dawley rats were exposed to H@*RESULTS@#The morphological investigation showed that XBJ attenuated H@*CONCLUSIONS@#XBJ ameliorated H

Efficacy of neuroendoscopic hematoma removal versus soft channel drainage for chronic subdural hematoma / 中国基层医药

Objective:To investigate the clinical efficacy of neuroendoscopic hematoma removal versus soft channel drainage in the treatment of chronic subdural hematoma (CSDH) and their effects on neurological function and quality of life. Methods:The clinical data of 97 patients with CSDH who received treatment between February 2018 and December 2019 were retrospectively analyzed. These patients were divided into group A ( n = 48, soft channel drainage) and group B ( n = 49, neuroendoscopic hematoma removal) according to different surgical methods. Clinical indicators, neurological function, quality of life, and incidence of complications were compared between groups A and B. Results:Operative time, length of hospital stay, and latency to hematoma disappearance in group B were (31.3 ± 2.18) minutes, (8.16 ± 1.32) days, (7.45 ± 1.49) days, which were significantly shorter than those in group A [(35.15 ± 4.32) minutes, (13.18 ± 1.56) days, (11.32 ± 1.88) days, t = 5.53, 17.12, 11.25, all P < 0.001]. At 3 months after surgery, the score of each dimension of SF-36 in each group was increased. The scores of physiological functioning, bodily pain, mental health, general health perceptions, social role functioning, vitality, role limitations due to emotional health, role limitations due to physical health in group B were (84.94 ± 7.25) points, (84.02 ± 6.29) points, (82.85 ± 8.16) points, (84.36 ± 9.15) points, (83.51 ± 10.39) points, (82.68 ± 8.36) points, (84.93 ± 10.15) points, (86.12 ± 9.13) points, which were significantly higher than those in group A [(62.68 ± 5.47) points, (71.39 ± 7.42) points, (69.51 ± 6.39) points, (72.68 ± 7.36) points, (72.81 ± 8.15) points, (73.12 ± 10.13) points, (77.91 ± 9.52) points, (75.32 ± 7.51) points, t = 19.82, 18.34, 19.75, 16.71, 17.94, 20.57, 18.22, 16.44, all P < 0.001]. At 7 days after surgery, neurotrophic factor, neuron specific enolase, hydrogen sulfide and S100B protein levels in group B were (42.53 ± 6.09) μg/L, (6.52 ± 2.79) μg/L, (203.17 ± 15.03) μmol/L, (0.25 ± 0.05) μg/L, respectively, which were significantly lower than those in group A [(67.38 ± 7.42) μg/L, (9.18 ± 2.27) μg/L, (242.79 ± 14.08) μmol/L, (0.36 ± 0.07) μg/L, t = 17.94, 5.12, 13.33, 8.86, all P < 0.001]. There was no significant difference in the incidence of complications between group B and group A [8.16% (4/49) vs. 18.75% (9/48), χ2 = 2.22, P = 0.136]. Conclusion:Compared with soft channel drainage, neuroendoscopic hematoma removal can better improve clinical indicators, neurological function, and quality of life in patients with CSDH, and is highly safe Neuroendoscopic hematoma removal is of certain clinical application value and innovation.

Determination of H2S in rat brain tissues by GC-MS based on bispentafluorobenzyl sulphide / 中国药理学通报

Aim To establish a method for the determination of hydrogen sulfide ( H2S) in rat brain tissues by gas chromatogra- phy-mass spectrometry (GC-MS) on bispentafluorobenzyl sulfide ( C6F5CH2SCH2C6F5 ).Methods Chromatographic conditions: Hie column was HP-5MS(30 m x 250 jxm x 0.25 |xm) and temperature programmed, the injection port temperature was 280 V..Mass spectrometry conditions: The electron bombardment ion source was 20 eV.'Hie ion source, quadrupole and interface temperature was kept at 230.150 and 280 XI, respectively, The MRM mode was used to quantitatively and qualitatively analyze the C6F5CH2SCH2C6F5 ion pair (m/z 394->181, m/z 181->161 ), Results The concentration of sodium hydro- sulfide( NaHS) in brain tissue samples had good linearity in the range of 0.25 ~256 jxmol • L~'.'Hie limit of detection was 0.1 jxmol • L~'.'Hie intra-day and inter-day precision were both less than 15%.There was no obvious matrix effect and the recover)' rate was more than 90%.'Hie H2S concentration in brain tissues could be selectively determined.'Hie basic H2S concentration in rat brain cortex was measured to be ( 11.84 ±0.38) jxmol • L_l.After intravenous injection of NaHS.the H2S concentration in brain tissues increased significantly in a dose-de- pendent manner.Conclusions The GC-MS method based on C6F5CH2SCH2C6F3 established here is reliable and effective to investigate H2S in brain tissues, and H2S could enter brain tissues through the blood-brain barrier.