nematode infections/hypoxia

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Airway obstruction by Ascaris, roundworm in a burned child.

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Ascaris lumbricoides, roundworm, is a Nematode parasite infecting about 1 billion people worldwide. We report the case of a ten-year-old Bedouin girl hospitalized with burns to 45% of her body surface area, including the face. The patient was intubated upon admission and mechanically ventilated.

HIF-1 modulates longevity and healthspan in a temperature-dependent manner.

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The hypoxia-inducible factor HIF-1 has recently been identified as an important modifier of longevity in the roundworm Caenorhabditis elegans. Studies have reported that HIF-1 can function as both a positive and negative regulator of life span, and several disparate models have been proposed for the

Biochemical properties of nematode O-acetylserine(thiol)lyase paralogs imply their distinct roles in hydrogen sulfide homeostasis.

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O-Acetylserine(thiol)lyases (OAS-TLs) play a pivotal role in a sulfur assimilation pathway incorporating sulfide into amino acids in microorganisms and plants, however, these enzymes have not been found in the animal kingdom. Interestingly, the genome of the roundworm Caenorhabditis elegans contains

The neuroscience of adaptive thermoregulation.

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The nervous system acts as a biological thermostat by controlling behaviors that regulate the warming and cooling of animals. We review the structures responsible for thermoregulation in three model species: roundworms (Caenorhabditis elegans), flies (Drosophila melanogaster), and rats (Rattus

Modulation of sensory information processing by a neuroglobin in Caenorhabditis elegans.

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Sensory receptor neurons match their dynamic range to ecologically relevant stimulus intensities. How this tuning is achieved is poorly understood in most receptors. The roundworm Caenorhabditis elegans avoids 21% O2 and hypoxia and prefers intermediate O2 concentrations. We show how this O2

Mechanisms of iron metabolism in Caenorhabditis elegans.

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Iron is involved in many biological processes essential for sustaining life. In excess, iron is toxic due to its ability to catalyze the formation of free radicals that damage macromolecules. Organisms have developed specialized mechanisms to tightly regulate iron uptake, storage and efflux. Over

TOR signaling never gets old: aging, longevity and TORC1 activity.

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The target of rapamycin (TOR) signal transduction network monitors intra- and extracellular conditions that favor cell growth. Research during the last decade has revealed a modular structure of the TOR signaling network. Each signaling module senses a particular set of signals from the cellular

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