During chemotherapy for acute leukemias, severe neutropenia allows acquisition of life-threatening infections that are difficult to clear with antibiotics alone. With return of myelopoiesis, even severe infections often improve dramatically. We have sequentially examined oxidative metabolic responses of polymorphonuclear leukocytes (PMNL) from 30 patients with acute leukemias before induction c...

Background: Salviamoorcroftiana Wall. ex Benth. is a herbaceous perennial plant indigenous to the Himalayan mountains and especially common in Kashmir Valley, India. This was selected based on its ethnopharmacological promise dearth of scientific reporting biological activity. study examined anticancer therapeutic potential also sought demonstrate induction apoptosis, autophagy, oxidative stres...

Real-world applications for unmanned and autonomous systems (UAS) teams continue to grow, and the scale and complexity of the teams are continually increasing. To reduce life cycle costs and improve test and evaluation (T&E), we increasingly need to develop a generalized framework that can support the design and development of T&E approaches for multi-UAS teams and validate the feasibility of t...

Opioids generate free radicals that mediate protection in isolated cultured cardiomyocytes. We hypothesize that the nature of these radicals is nitric oxide, and that nitric oxide activates the protein kinase C (PKC) isoform. Through this signal transduction pathway, opiates protect cardiomyocytes during hypoxia and reoxygenation. Cell viability was quantified in chick embryonic ventricular myo...

Flow-induced dilation (FID) is dependent largely on hyperpolarization of vascular smooth muscle cells (VSMCs) in human coronary arterioles (HCA) from patients with coronary disease. Animal studies show that shear stress induces endothelial generation of hydrogen peroxide (H2O2), which is proposed as an endothelium-derived hyperpolarizing factor (EDHF). We tested the hypothesis that H2O2 contrib...

OBJECTIVES Spinocerebellar ataxia type 3/Machado-Joseph disease (SCA3/MJD) is a polyglutamine disorder with no current disease-modifying treatment. Conformational changes in mutant ataxin-3 trigger different pathogenic cascades, including reactive oxygen species (ROS) generation; however, the clinical relevance of oxidative stress elements as peripheral biomarkers of SCA3/MJD remains unknown. W...

BACKGROUND Colorectal cancer has become one of the leading cause of cancer morbidity and mortality throughout world. Hederagenin, a derivative of oleanolic acid isolated from the leaves of ivy (Hedera helix L.), has been shown to have potential anti-tumor activity. The study was conducted to evaluate whether hederagenin could induce apoptosis of human colon cancer LoVo cells and explore the pos...

Perinatal hypoxia-ischemia (HI) gives rise to inadequate substrate supply to the brain tissue, resulting in damage to neural cells. Previous studies at different time points of development, and with different animal species, suggest that the HI insult causes oxidative damage and changes Na+, K+-ATPase activity, which is known to be very susceptible to free radical-related lipid peroxidation. Th...

Acetaminophen (APAP) toxicity in primary mouse hepatocytes occurs in two phases. The initial phase (0-2 h) occurs with metabolism to N-acetyl-p-benzoquinoneimine which depletes glutathione, and covalently binds to proteins, but little toxicity is observed. Subsequent washing of hepatocytes to remove APAP and reincubating in media alone (2-5 h) results in toxicity. We previously reported that th...

BACKGROUND Although such local herb as Streblus asper (family Moraceae) has long been recognized for traditional folk medicines and important ingredient of traditional longevity formula, its anti-neurodegeneration or anti-aging activity is little known. This study aimed to investigate the neuroprotective effect of S. asper leaf extracts (SA-EE) against toxicity of glutamate-mediated oxidative s...