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Hemin-induced apoptosis in PC12 and neuroblastoma cells: implications for local neuronal death associated with intracerebral hemorrhage.

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The exact pathogenesis of neuronal death following bleeding in brain parenchyma is still unknown. Hemoglobin (Hb) toxicity has been postulated to be one of the underlying mechanisms. The purpose of this study was to examine the possible contribution to neurotoxicity of each of the Hb compounds and

Hyperbaric Oxygen Preconditioning Attenuates Hemorrhagic Transformation Through Reactive Oxygen Species/Thioredoxin-Interacting Protein/Nod-Like Receptor Protein 3 Pathway in Hyperglycemic Middle Cerebral Artery Occlusion Rats.

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To clarify whether hyperbaric oxygen preconditioning can attenuate hyperglycemia-enhanced hemorrhagic transformation and to establish a role for Nod-like receptor protein 3 inflammasome in the pathophysiology of hemorrhagic transformation. Controlled prospective animal study. University research

The metabolism and toxicity of hemin in astrocytes.

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Hemin is cytotoxic, and contributes to the brain damage that accompanies hemorrhagic stroke. In order to better understand the basis of hemin toxicity in astrocytes, the present study quantified hemin metabolism and compared it to the pattern of cell death. Heme oxygenase-1 (HO-1) expression was

Phase I clinical trial of isophosphamide (NSC-109724).

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An initial clinical phase I trial of isophosphamide has been carried out at dose levels of 200-10,000 mg/m2 of body surface area using a single-dose, every-3-week schedule. Significant toxicity was not seen at isophosphamide dose levels less than 2900 mg/m2. At higher doses, nausea and vomiting was

Acute ethanol pretreatment increases FAS-mediated liver injury in mice: role of oxidative stress and CYP2E1-dependent and -independent pathways.

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This study evaluated whether acute ethanol pretreatment potentiates Fas-mediated liver injury and if oxidative stress and CYP2E1 play a role in any enhanced hepatotoxicity. There were 3-fold increases of transaminases and more extensive apoptotic necrosis of hepatocytes and focal hemorrhages of the

Potential Utility of N-acetylcysteine for Treating Mustard Lung.

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More than a century after the introduction of sulfur mustard (SM), as a chemical warfare agent, it has affected thousands of military and civilians on several occasions. The most notable toxic effects of this easily produced chemical, are lung damage ranges from necrotic, hemorrhagic, and infectious

Possible role of nicaraven in neuroprotective effect on hippocampal slice culture.

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Nicaraven is an agent that is especially beneficial in vasospasm or brain damage caused by subarachnoid hemorrhage. It ameliorates neurological deficits of patients and protects the central nervous system from ischemia. We investigated the neuroprotective effect of nicaraven against oxygen-glucose

Selective involvement of reactive oxygen intermediates in platelet-activating factor-mediated activation of NF-kappaB.

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Although it has been suggested that some biological activities of platelet-activating factor (PAF) are mediated by, at least in part, reactive oxygen intermediates (ROI), the precise mechanisms underlying the interaction between the two remains to be elucidated. Antioxidants, such as

Hemin-induced necroptosis involves glutathione depletion in mouse astrocytes.

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Intracerebral hemorrhage (ICH) is a devastating neurological injury associated with significant mortality. Astrocytic inflammation may contribute to the pathogenesis of ICH, although the underlying cellular mechanisms remain unclear. In this study, the hemoglobin oxidation by-product, hemin,

Protection from half-mustard-gas-induced acute lung injury in the rat.

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The chemical warfare agent analog, 2-chloroethyl ethyl sulfide, known as 'half-mustard gas' (HMG), is less toxic and less of an environmental hazard than the full molecule and has been shown to produce an acute lung injury in rats when instilled via intrapulmonary injection. This injury is

Activation of polymorphonuclear leukocytes in oleic acid-induced lung injury.

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OBJECTIVE Oleic acid (OA) can produce a lung injury similar to the adult respiratory distress syndrome (ARDS). Elastase and superoxides are thought to have an effect in ARDS. However, the effect that elastase and superoxide have in OA lung injury is unclear. To examine their involvement in OA lung

Role of salivary mucin in the protection of rat esophageal mucosa from acid and pepsin-induced injury.

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The mucosal defensive mechanisms of the esophagus against acid and pepsin remain to be elucidated. In the present study, we investigated the contribution of the salivary mucin in maintaining the integrity of the esophageal mucosa. When an everted esophageal sac, isolated from normal rat, was treated

Melatonin Attenuates Thrombin-induced Inflammation in BV2 Cells and Then Protects HT22 Cells from Apoptosis

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Increasing evidence has revealed that the uncontrolled thrombin-induced inflammation following intracerebral hemorrhage (ICH) plays a key role in ICH. Oxidative stress and neuroinflammatory responses are interdependent and bidirectional events. Melatonin is now recognized as an antioxidant and a

ROS/TXNIP pathway contributes to thrombin induced NLRP3 inflammasome activation and cell apoptosis in microglia.

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There is no effective therapy for intracerebral hemorrhage (ICH) because of poor understanding of the mechanisms of brain injury after hemorrhage. The NLRP3 inflammasome, as a vital component of innate immune system, which is associated with a wide range of human CNS disorders, including ICH. But

Cigarette smoke extract upregulates heme oxygenase-1 via PKC/NADPH oxidase/ROS/PDGFR/PI3K/Akt pathway in mouse brain endothelial cells.

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BACKGROUND In the brain, the inducible form of heme oxygenase (HO-1) has been recently demonstrated to exacerbate early brain injury produced by intracerebral hemorrhagic stroke which incident rate has been correlated with cigarette smoking previously. Interestingly, cigarette smoke (CS) or

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