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Graphene Quantum Dots: Synthesis, Characterization, Cell Viability, Genotoxicity for Biomedical Applications
We report the synthesis and applications of a novel N-doped graphene quantum dots (GQDs) using hydrothermal reaction between citric acid and p-aminophenol. The synthesized N-doped GQDs have been characterized physico-chemically and evaluated its antioxidant, antimicrobial, DNA binding and cleavage activities. siRNA loading studies were performed and their effects on cells were evaluated. Obtained results indicate that monodisperse solution of N-doped GQDs has been obtained with particles size ca. ∼10.9±1.3 nm. UV-Vis spectroscopy studies of the interactions between the N-doped GQDs and calf thymus DNA (CT-DNA) showed th...
Source: Saudi Pharmaceutical Journal - May 21, 2019 Category: Drugs & Pharmacology Source Type: research

Parthenolide, a feverfew-derived phytochemical, ameliorates obesity and obesity-induced inflammatory responses via the Nrf2/Keap1 pathway
Publication date: Available online 9 May 2019Source: Pharmacological ResearchAuthor(s): Chae Young Kim, Bobin Kang, Hyung Joo Suh, Hyeon-Son ChoiAbstractParthenolide (PL) is one of the most abundant sesquiterpene lactones found in the plant feverfew (Tanacetum parthenium (L.) Sch.Bip.). PL was investigated for its effect on obesity and obesity-induced inflammatory/oxidant responses in vitro and in vivo. An obesity-induced inflammatory response was induced in various co-culture systems using adipocytes (3T3-L1) and macrophages (RAW264.7) in vitro and the effect of PL and its mechanism of action were determined. PL effective...
Source: Pharmacological Research - May 11, 2019 Category: Drugs & Pharmacology Source Type: research

Magnesium isoglycyrrhizinate ameliorates radiation-induced pulmonary fibrosis by inhibiting fibroblast differentiation via the p38MAPK/Akt/Nox4 pathway
Publication date: July 2019Source: Biomedicine & Pharmacotherapy, Volume 115Author(s): Qunfang Yang, Pan Zhang, Tao Liu, Xuan Zhang, Xichun Pan, Yanyan Cen, Ya Liu, Haigang Zhang, Xiaohong ChenAbstractRadiation-induced pulmonary fibrosis (RIPF) is a severe complication in patients treated with thoracic irradiation. Until now, there are no effective therapeutic drugs for RIPF. In the present study, we attempted to evaluate the effect of Magnesium isoglycyrrhizinate (MgIG) on RIPF, and to further explore the underlying mechanisms. We found that MgIG treatment markedly improved radiation-induced lung pathological changes, red...
Source: Biomedicine and Pharmacotherapy - May 8, 2019 Category: Drugs & Pharmacology Source Type: research

Magnesium isoglycyrrhizinate ameliorates radiation-induced pulmonary fibrosis by inhibiting fibroblast differentiation via the p38MAPK/Akt/Nox4 pathway.
Abstract Radiation-induced pulmonary fibrosis (RIPF) is a severe complication in patients treated with thoracic irradiation. Until now, there are no effective therapeutic drugs for RIPF. In the present study, we attempted to evaluate the effect of Magnesium isoglycyrrhizinate (MgIG) on RIPF, and to further explore the underlying mechanisms. We found that MgIG treatment markedly improved radiation-induced lung pathological changes, reduced collagen deposition, and decreased the transforming growth factor beta1 (TGF-β1) elevation induced by irradiation. In addition, MgIG treatment significantly relieved oxidative d...
Source: Biomedicine and pharmacotherapy = Biomedecine and pharmacotherapie - May 6, 2019 Category: Drugs & Pharmacology Authors: Yang Q, Zhang P, Liu T, Zhang X, Pan X, Cen Y, Liu Y, Zhang H, Chen X Tags: Biomed Pharmacother Source Type: research

Ability to Suppress TGF- β-Activated Myofibroblast Differentiation Distinguishes the Anti-pulmonary Fibrosis Efficacy of Two Danshen-Containing Chinese Herbal Medicine Prescriptions
Conclusion: This study suggests that a clinically efficacious cardiovascular Chinese herbal medicine (DLP) can be successfully repurposed to treat a lung disease in pulmonary fibrosis guided by TCM theory. Our comparative study between DLP and DHP demonstrated a critical requirement of suppressing both pro-inflammatory and pro-fibrotic pathways for the treatment of pulmonary fibrosis, supporting that a multi-component prescription capable of “removing both phlegm and blood stasis” will better achieve co-protection of heart and lung in PHD. Introduction Idiopathic pulmonary fibrosis (IPF) is a chronic ...
Source: Frontiers in Pharmacology - April 23, 2019 Category: Drugs & Pharmacology Source Type: research

Auranofin, an Anti-rheumatic Gold Drug, Aggravates the Radiation-Induced Acute Intestinal Injury in Mice
Conclusion In this study, we found that a non-toxic dose of auranofin significantly aggravated the severity of the radiation-induced intestinal injury. This suggests that auranofin treatment can be an independent factor that influences the risk of intestinal complications after pelvic or abdominal radiotherapy. Ethics Statement All the protocols used in this study were approved by the Institutional Animal Care and Use Committee of the Korean Institute of Radiological and Medical Sciences (IACUC permit number: KIRAMS217-0007). Author Contributions H-JL, JS, and Y-BL designed the experiments. EL and JK conducted the exp...
Source: Frontiers in Pharmacology - April 23, 2019 Category: Drugs & Pharmacology Source Type: research

Resveratrol Promotes Diabetic Wound Healing via SIRT1-FOXO1-c-Myc Signaling Pathway-Mediated Angiogenesis
Conclusion: Our findings indicate that the positive role of RES in diabetic wound healing via its SIRT1-dependent endothelial protection and pro-angiogenic effects involves the inhibition of FOXO1 and the de-repression of c-Myc expression. Introduction Diabetes mellitus is a metabolic disease with an increasing incidence worldwide (Zimmet et al., 2014). The disease often leads to the development of serious complications such as microangiopathy, mainly including retinopathy, nephropathy, neuropathy, and diabetic non-healing skin ulcers (Zheng et al., 2018). Diabetic non-healing skin ulcers such as foot ulcers are ca...
Source: Frontiers in Pharmacology - April 23, 2019 Category: Drugs & Pharmacology Source Type: research

The in vitro and in vivo depigmenting activity of Coenzyme Q10 through the down-regulation of α-MSH signaling pathways and induction of Nrf2/ARE-mediated antioxidant genes in UVA-irradiated skin keratinocytes.
Abstract Coenzyme CoQ10 (CoQ10), a ubiquinone compound, has been reported to inhibit tyrosinase activity and melanin production in melanoma B16F10 cells. However, the molecular mechanism underlying this inhibitory effect is poorly understood. In this paper we aimed to investigate the molecular mechanisms involved in the anti-melanogenic activity of CoQ10 (1-2 μM) in UVA (5 J/cm2)-irradiated keratinocyte HaCaT cells and α-MSH stimulated B16-F10 cells. It was observed that CoQ10 suppressed p53/POMC, α-MSH production as well as inhibited ROS generation in UVA-irradiated keratinocyte HaCaT cells. CoQ10 down-regulat...
Source: Biochemical Pharmacology - April 12, 2019 Category: Drugs & Pharmacology Authors: Hseu YC, Ho YG, Mathew DC, Yen HR, Chen XZ, Yang HL Tags: Biochem Pharmacol Source Type: research

Plant-Derived Alkaloids: The Promising Disease-Modifying Agents for Inflammatory Bowel Disease
Conclusion This paper summarizes the current findings regarding the anti-colitis activity of plant-derived alkaloids and shows how these alkaloids exhibit significant and beneficial effects in alleviating colonic inflammation. These natural alkaloids are not only promising agents for IBD treatment but are also components for developing new wonder drugs. However, the underlying molecular mechanisms or toxicological evaluation of most plant-derived alkaloids still require much scientific research, and their actual efficacies for IBD patients have not been verified well in field research. Thus, further clinical trials to elu...
Source: Frontiers in Pharmacology - April 11, 2019 Category: Drugs & Pharmacology Source Type: research

Lycium barbarum polysaccharide reduces hyperoxic acute lung injury in mice through Nrf2 pathway
ConclusionsLBP improves hyperoxic ALI via Nrf2-dependent manner. The LBP-induced activation of Nrf2 is mediated, at least in part, by AMPK pathway.
Source: Biomedicine and Pharmacotherapy - January 4, 2019 Category: Drugs & Pharmacology Source Type: research

Lycium barbarum polysaccharide reduces hyperoxic acute lung injury in mice through Nrf2 pathway.
CONCLUSIONS: LBP improves hyperoxic ALI via Nrf2-dependent manner. The LBP-induced activation of Nrf2 is mediated, at least in part, by AMPK pathway. PMID: 30611998 [PubMed - as supplied by publisher]
Source: Biomedicine and pharmacotherapy = Biomedecine and pharmacotherapie - January 3, 2019 Category: Drugs & Pharmacology Authors: Zheng G, Ren H, Li H, Li X, Dong T, Xu S, Yan Y, Sun B, Bai J, Li Y Tags: Biomed Pharmacother Source Type: research

Naringenin targets on astroglial Nrf2 to support dopaminergic neurons
Publication date: Available online 6 December 2018Source: Pharmacological ResearchAuthor(s): Guo-Qing Wang, Bei Zhang, Xue-Mei He, Dai-Di Li, Jing-Shan Shi, Feng ZhangAbstractAstroglia serve as a critical role in metabolic and neurotrophic support to neurons. The loss of astroglia-derived neurotrophic effects could be a primary contributor to Parkinson’s disease (PD). Thus, understanding astroglia functions is an important strategy for enhancing neuronal survival. Nuclear factor erythroid 2-related factor 2 (Nrf2) plays a key role in neuronal resistance to oxidative stress and glutamate-induced excitotoxicity. Balancing ...
Source: Pharmacological Research - December 7, 2018 Category: Drugs & Pharmacology Source Type: research

Inhibition of TREM1 reduces inflammation and oxidative stress after spinal cord injury (SCI) associated with HO-1 expressions
Publication date: January 2019Source: Biomedicine & Pharmacotherapy, Volume 109Author(s): Zhenhuan Li, Furong Wu, Dafeng Xu, Zhongzheng Zhi, Guanghui XuAbstractSpinal cord injury (SCI) is a devastating event, leading to the progression of chronic neuropathic pain syndrome. Triggering receptor expressed on myeloid cells 1 (TREM1) is an innate immune receptor expressed on neutrophils and monocytes/macrophages. TREM1 enhances inflammatory response in various models of diseases, but its significance in SCI remains unclear. In the present study, we attempted to explore the effects of TREM1 on the regulation of SCI. Spinal cord ...
Source: Biomedicine and Pharmacotherapy - November 27, 2018 Category: Drugs & Pharmacology Source Type: research

Oxidative stress-elicited YY1 potentiates antioxidative response via enhancement of NRF2-driven transcriptional activity: A potential neuronal defensive mechanism against ischemia/reperfusion cerebral injury
Publication date: December 2018Source: Biomedicine & Pharmacotherapy, Volume 108Author(s): Wei Liu, Qingdong Guo, Haikang ZhaoAbstractCerebral ischemia challenge evokes an adaptive defensive system through the induction of antioxidant enzymes. Many of such antioxidant enzymes are regulated essentially by the nuclear factor erythroid 2-related factor-2 (NRF2). Compelling evidence supports that targeting NRF2 signaling is a promising therapeutic strategy to alleviate post-I/R brain injury, but the molecular mechanisms underlying this strategy have yet to be elucidated. Herein, we show that the expression of transcription fac...
Source: Biomedicine and Pharmacotherapy - October 5, 2018 Category: Drugs & Pharmacology Source Type: research

Inhibition of phosphodiesterase 2 reverses gp91phox oxidase-mediated depression- and anxiety-like behavior.
Abstract Phosphodiesterase 2 (PDE2) plays an important role in treatment of stress-related depression through regulation of antioxidant defense and neuroprotective mechanisms. However, the causal relationship between PDE2 and the prevalence of depression and anxiety upon exposure to oxidative stress has not been investigated. The present study examined whether the effects of PDE2 inhibition on oxidative stress were directly involved in reduced ROS by regulating NADPH subunits gp91phox oxidase. The results suggested that the PDE2 inhibitor Bay 60-7550 reversed oxidative stress-induced behavioral signature, i.e. dep...
Source: Neuropharmacology - September 27, 2018 Category: Drugs & Pharmacology Authors: Huang X, Xiaokaiti Y, Yang J, Pan J, Li Z, Luria V, Li Y, Song G, Zhu X, Zhang HT, O'Donnell JM, Xu Y Tags: Neuropharmacology Source Type: research

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