Construction of A Near-infrared Fluorescent Probe for Ratiometric Imaging of Peroxynitrite during tumor progression

The Analyst ◽  
2021 ◽  
Author(s):  
Zan Li ◽  
Jiao Lu ◽  
Qing Pang ◽  
Jinmao You
Keyword(s):  
Reactive Oxygen Species ◽  
Tumor Progression ◽  
Fluorescent Probe ◽  
Near Infrared ◽  
Malignant Tumors ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Ratiometric Imaging ◽  
Human Death

Malignant tumors are one of the main causes for human death, which are tightly associated with overexpression of reactive oxygen species (ROS) in pathological processes. Therefore, in vivo monitoring of...

Influence of low-dose-rate red and near-infrared radiations on the level of reactive oxygen species, the genetic apparatus and the tumor growth in mice in vivo

BIOPHYSICS ◽  
2013 ◽  
Vol 58 (5) ◽  
pp. 712-717 ◽  
Author(s):  
S. I. Zaichkina ◽  
O. M. Rozanova ◽  
A. R. Dyukina ◽  
N. B. Simonova ◽  
S. P. Romanchenko ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Tumor Growth ◽  
Dose Rate ◽  
Low Dose ◽  
Near Infrared ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Genetic Apparatus ◽  
Low Dose Rate

A two-photon fluorescent probe for ratiometric imaging of endogenous hypochlorous acid in live cells and tissues

2017 ◽  
Vol 53 (78) ◽  
pp. 10800-10803 ◽  
Author(s):  
Yong Woong Jun ◽  
Sourav Sarkar ◽  
Subhankar Singha ◽  
Ye Jin Reo ◽  
Hye Rim Kim ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Fluorescent Probe ◽  
Hypochlorous Acid ◽  
Reactive Oxygen ◽  
Live Cells ◽  
Oxygen Species ◽  
Two Photon ◽  
Ratiometric Imaging ◽  
In Cells

A fluorescent probe enables two-photon ratiometric imaging of endogenous hypochlorous acid, a reactive oxygen species, in cells and tissues.

scholarly journals In Vivo Imaging of Retinal Oxidative Stress Using a Reactive Oxygen Species–Activated Fluorescent Probe

2015 ◽  
Vol 56 (10) ◽  
pp. 5862 ◽  
Author(s):  
Megan C. Prunty ◽  
Moe H. Aung ◽  
Adam M. Hanif ◽  
Rachael S. Allen ◽  
Micah A. Chrenek ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Reactive Oxygen Species ◽  
Fluorescent Probe ◽  
In Vivo Imaging ◽  
Reactive Oxygen ◽  
Oxygen Species

scholarly journals Targeting autophagy enhances atezolizumab-induced mitochondria-related apoptosis in osteosarcoma

2021 ◽  
Vol 12 (2) ◽  
Author(s):  
Zhuochao Liu ◽  
Hongyi Wang ◽  
Chuanzhen Hu ◽  
Chuanlong Wu ◽  
Jun Wang ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Antitumor Immunity ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Specific Monoclonal Antibody ◽  
Osteosarcoma Cells ◽  
Jnk Pathway ◽  
In Vivo Experiments

AbstractIn this study, we identified the multifaceted effects of atezolizumab, a specific monoclonal antibody against PD-L1, in tumor suppression except for restoring antitumor immunity, and investigated the promising ways to improve its efficacy. Atezolizumab could inhibit the proliferation and induce immune-independent apoptosis of osteosarcoma cells. With further exploration, we found that atezolizumab could impair mitochondria of osteosarcoma cells, resulting in increased release of reactive oxygen species and cytochrome-c, eventually leading to mitochondrial-related apoptosis via activating JNK pathway. Nevertheless, the excessive release of reactive oxygen species also activated the protective autophagy of osteosarcoma cells. Therefore, when we combined atezolizumab with autophagy inhibitors, the cytotoxic effect of atezolizumab on osteosarcoma cells was significantly enhanced in vitro. Further in vivo experiments also confirmed that atezolizumab combined with chloroquine achieved the most significant antitumor effect. Taken together, our study indicates that atezolizumab can induce mitochondrial-related apoptosis and protective autophagy independently of the immune system, and targeting autophagy is a promising combinatorial approach to amplify its cytotoxicity.

scholarly journals Plant Extracts and Reactive Oxygen Species as Two Counteracting Agents with Anti- and Pro-Obesity Properties

2019 ◽  
Vol 20 (18) ◽  
pp. 4556 ◽  
Author(s):  
Hanna Zielinska-Blizniewska ◽  
Przemyslaw Sitarek ◽  
Anna Merecz-Sadowska ◽  
Katarzyna Malinowska ◽  
Karolina Zajdel ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Plant Extracts ◽  
Complex Disease ◽  
Reactive Oxygen ◽  
Complementary Therapy ◽  
Biologically Active ◽  
Mitochondrial Activity ◽  
Oxygen Species

Obesity is a complex disease of great public health significance worldwide: It entails several complications including diabetes mellitus type 2, cardiovascular dysfunction and hypertension, and its prevalence is increasing around the world. The pathogenesis of obesity is closely related to reactive oxygen species. The role of reactive oxygen species as regulatory factors in mitochondrial activity in obese subjects, molecules taking part in inflammation processes linked to excessive size and number of adipocytes, and as agents governing the energy balance in hypothalamus neurons has been examined. Phytotherapy is the traditional form of treating health problems using plant-derived medications. Some plant extracts are known to act as anti-obesity agents and have been screened in in vitro models based on the inhibition of lipid accumulation in 3T3-L1 cells and activity of pancreatic lipase methods and in in vivo high-fat diet-induced obesity rat/mouse models and human models. Plant products may be a good natural alternative for weight management and a source of numerous biologically-active chemicals, including antioxidant polyphenols that can counteract the oxidative stress associated with obesity. This review presents polyphenols as natural complementary therapy, and a good nutritional strategy, for treating obesity without serious side effects.

Plasmon-Mediated Generation of Reactive Oxygen Species from Near-Infrared Light Excited Gold Nanocages for Photodynamic Therapyin Vitro

ACS Nano ◽  
2014 ◽  
Vol 8 (7) ◽  
pp. 7260-7271 ◽  
Author(s):  
Liang Gao ◽  
Ru Liu ◽  
Fuping Gao ◽  
Yaling Wang ◽  
Xinglu Jiang ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Near Infrared ◽  
Reactive Oxygen ◽  
Infrared Light ◽  
Oxygen Species ◽  
Near Infrared Light ◽  
Gold Nanocages

scholarly journals Costunolide Induces Apoptosis via the Reactive Oxygen Species and Protein Kinase B Pathway in Oral Cancer Cells

2021 ◽  
Vol 22 (14) ◽  
pp. 7509
Author(s):  
Hai Huang ◽  
Jun-Koo Yi ◽  
Su-Geun Lim ◽  
Sijun Park ◽  
Haibo Zhang ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Cell Cycle ◽  
Flow Cytometry ◽  
Oral Cancer ◽  
Cancer Cells ◽  
Reactive Oxygen ◽  
Migration And Invasion ◽  
Oxygen Species ◽  
Oral Cancer Cells

Oral cancer (OC) has been attracted research attention in recent years as result of its high morbidity and mortality. Costunolide (CTD) possesses potential anticancer and bioactive abilities that have been confirmed in several types of cancers. However, its effects on oral cancer remain unclear. This study investigated the potential anticancer ability and underlying mechanisms of CTD in OC in vivo and in vitro. Cell viability and anchorage-independent colony formation assays were performed to examine the antigrowth effects of CTD on OC cells; assessments for migration and invasion of OC cells were conducted by transwell; Cell cycle and apoptosis were investigated by flow cytometry and verified by immunoblotting. The results revealed that CTD suppressed the proliferation, migration and invasion of oral cancer cells effectively and induced cell cycle arrest and apoptosis; regarding the mechanism, CTD bound to AKT directly by binding assay and repressed AKT activities through kinase assay, which thereby downregulating the downstream of AKT. Furthermore, CTD remarkably promotes the generation of reactive oxygen species by flow cytometry assay, leading to cell apoptosis. Notably, CTD strongly suppresses cell-derived xenograft OC tumor growth in an in vivo mouse model. In conclusion, our results suggested that costunolide might prevent progression of OC and promise to be a novel AKT inhibitor.

Sign in / Sign up

Export Citation Format

Share Document