phytohemagglutinin/hypoxia

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Influence of in vivo hypobaric hypoxia on function of lymphocytes, neutrocytes, natural killer cells, and cytokines.

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We have investigated the effects of short-term hypoxia in vivo on the human cellular immune system. Seven young healthy volunteers were placed in a decompression chamber (380 Torr) for 20 min with or without supplemental O2. The leukocyte concentration increased during hypobaric conditions because

Inducible nitric oxide synthase expression and plasma bilirubin changes in rats under intermittent hypoxia treatment.

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It has been reported that intermittent hypoxia treatment prevents oxidative injuries to the brain and protects the heart against ischemia-reperfusion injury. Both anti-oxidative defensive systems and prevention of free intracellular calcium overload might be the result of intermittent hypoxia. Thus,

NF-κB enhances hypoxia-driven T-cell immunosuppression via upregulation of adenosine A(2A) receptors.

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Hypoxia affects inflammation by modulating T-cell activation via the adenosinergic system. We supposed that, in turn, inflammation influences cell hypoxic behavior and that stimulation of T-cells in inflammatory conditions involves the concerted action of the nuclear factor κB (NF-κB) and the

Hypoxia affects cytokine production and proliferative responses by human peripheral mononuclear cells.

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We have shown that hypoxia (2% O2 approximately pO2 14 mmHg) as opposed to O2 atmospheric pressure (20.9% O2 approximately pO2 140 mmHg) can deeply affect the production of cytokines in human peripheral mononuclear cells (PBMC) in the presence or absence of a specific T-cell activator such as

[Protective effects of hepatocyte growth factor on hypoxic human pulmonary microvascular endothelial cells].

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OBJECTIVE To investigate the protective effects of hepatocyte growth factor (HGF) on hypoxic human pulmonary microvascular endothelial cells (HPMECs). METHODS HPMECs were cultured in vitro, and the hypoxic model was established by the physical method. Cells were divided into 4 groups: the control

Human cadaver multipotent stromal/stem cells isolated from arteries stored in liquid nitrogen for 5 years.

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BACKGROUND Regenerative medicine challenges researchers to find noncontroversial, safe and abundant stem cell sources. In this context, harvesting from asystolic donors could represent an innovative and unlimited reservoir of different stem cells. In this study, cadaveric vascular tissues were

Operation Everest II: alterations in the immune system at high altitudes.

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We investigated the effects on immune function after progressive hypobaric hypoxia simulating an ascent to 25,000 ft (7620 m) over 4 weeks. Multiple simultaneous in vitro and in vivo immunologic variables were obtained from subjects at sea level, 7500 ft (2286 m), and 25,000 ft during a

Cobalt Chloride Enhances the Anti-Inflammatory Potency of Human Umbilical Cord Blood-Derived Mesenchymal Stem Cells through the ERK-HIF-1α-MicroRNA-146a-Mediated Signaling Pathway.

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Human mesenchymal stem cells (hMSCs), including human umbilical cord blood-derived mesenchymal stem cells (hUCB-MSCs), which have high proliferation capacity and immunomodulatory properties, are considered to be a good candidate for cell-based therapies. hMSCs show enhanced therapeutic effects via

Propylthiouracil-induced diffuse interstitial pneumonitis.

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Cough productive of sputum, exertional dyspnea, and hypoxemia developed in two patients with Graves' disease after six months (patient 1) or three weeks (patient 2) of treatment with propylthiouracil, 300 mg/day. Chest roentgenograms and transbronchial lung biopsy specimens revealed diffuse

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