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Brain edema in acute liver failure: inhibition by L-histidine.

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Brain edema and the associated increase in intracranial pressure are potentially lethal complications of acute liver failure (ALF). Astrocyte swelling (cytotoxic edema) represents a significant component of the brain edema in ALF, and elevated blood and brain ammonia levels have been strongly

L-histidine but not D-histidine attenuates brain edema following cryogenic injury in rats.

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Oxygen free radicals have been implicated in the genesis of traumatic brain injury and brain edema (BE). Recent studies have suggested that hydroxyl radical can initiate lipid peroxidation, thus producing lipid-free radicals that may become important sources of singlet oxygen. L-histidine, a singlet

Alleviation of ischemia-induced brain edema by activation of the central histaminergic system in rats.

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We have reported that facilitation of central histaminergic activity prevents the development of ischemia-induced brain injury. Since cerebral edema is a major cause of brain damage, we studied effects on brain edema of postischemic administration of L-histidine, a precursor of histamine, and

Changes of the thioredoxin system, glutathione peroxidase activity and total antioxidant capacity in rat brain cortex during acute liver failure: modulation by L-histidine.

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Glutathione and thioredoxin are complementary antioxidants in the protection of mammalian tissues against oxidative-nitrosative stress (ONS), and ONS is a principal cause of symptoms of hepatic encephalopathy (HE) associated with acute liver failure (ALF). We compared the activities of the

Carnosine Attenuates Brain Oxidative Stress and Apoptosis After Intracerebral Hemorrhage in Rats.

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Carnosine, an endogenous dipeptide (β-alanyl-L-histidine), exerts multiple neuroprotective properties, but its role in intracerebral hemorrhage (ICH) remains unclear. This study investigates the effect of Carnosine on brain injury using the rat ICH model, which is established by type IV collagenase

Protective effect of orally administered carnosine on bleomycin-induced lung injury.

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Carnosine is an endogenously synthesized dipeptide composed of beta-alanine and L-histidine. It acts as a free radical scavenger and possesses antioxidant properties. Carnosine reduces proinflammatory and profibrotic cytokines such as transforming growth factor-beta (TGF-beta), IL-1, and TNF-alpha

Role of oxygen intermediates in UV-induced epidermal cell injury.

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To investigate the role of oxygen intermediates (OIs) in sunburn cell (SC) formation and development of UV-inflammation in vivo, groups of mice were injected intravenously with OI scavengers, including bovine blood superoxide dismutase (SOD), bovine liver catalase, L-histidine, D-mannitol, and

Lack of histamine synthesis and down-regulation of H1 and H2 receptor mRNA levels by dexamethasone in cerebral endothelial cells.

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The purpose of this work was to determine whether cerebral endothelial cells have the capacity to synthesize histamine or to express mRNA of receptors that specifically respond to available free histamine. The histamine concentrations and the expression of L-histidine decarboxylase (HDC) and

Carnosine attenuates early brain injury through its antioxidative and anti-apoptotic effects in a rat experimental subarachnoid hemorrhage model.

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Carnosine (β-alanyl-L-histidine) has been demonstrated to provide antioxidative and anti-apoptotic roles in the animal of ischemic brain injuries and neurodegenerative diseases. The aim of this study was to examine whether carnosine prevents subarachnoid hemorrhage (SAH)-induced early brain injury

Brain aquaporin-4 in experimental acute liver failure.

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Intracranial hypertension caused by brain edema and associated astrocyte swelling is a potentially lethal complication of acute liver failure (ALF). Mechanisms of edema formation are not well understood, but elevated levels of blood and brain ammonia and its by-product glutamine have been implicated

Role of histamine in brain protection in surgical brain injury in mice.

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Surgical resection of brain tissue is associated with tissue damage at the resection margin. Studies of ischemic brain injury in rodents have shown that administration of L-histidine and thioperamide reduces ischemic tissue loss, in part by inhibition of apoptotic cell death. In this study we tested

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